The application of dc motor speed control system

When should I choose to use a dc motor speed control system?
 The DC governor is required for the following occasions:

1. A wide speed range is required.
2. A faster dynamic response process is required.
3. An automatic smooth transition process is required for acceleration and deceleration.
4. When the low speed operation is required, the torque is large.
5. Need better excavator characteristics, can automatically limit the overload current to the set current.


The application of dc motor speed control system:
DC governor in CNC machine tools, paper printing, textile printing and dyeing, cable and cable equipment, packaging machinery, electrical machinery, food processing machinery, rubber machinery, biological equipment, printed circuit board equipment, laboratory equipment, welding and cutting, light industrial machinery , logistics and transportation equipment, rolling stock, medical equipment, communications equipment, radar equipment, satellite ground receiving systems and other industries are widely used.
The application of dc motor speed control system, the working principle of the DC governor is briefly introduced:
The DC governor is the device for adjusting the speed of the DC motor. The upper end is connected to the AC power supply, the application of dc motor speed control system, the lower end is connected to the DC motor, and the DC governor converts the AC power into two output DC power supplies, one input to the DC motor neodymium (stator), all the way Input to the DC motor armature (rotor), the DC governor adjusts the DC motor speed by controlling the armature DC voltage. At the same time, the DC motor gives a feedback current to the governor. The governor determines the speed of the dc motor speed control system according to the feedback current. If necessary, the armature voltage output is corrected to adjust the motor speed again.


The application of dc motor speed control system, DC motor speed control scheme generally has the following three ways: 1, change the armature voltage; 2, change the excitation winding voltage; 3, change the armature loop resistance. The most commonly used is the voltage regulation system, which is 1 (changing the armature voltage).


The application of dc motor speed control system,A modular DC motor governor integrates power supply, control and drive circuits, adopts a three-dimensional structure layout, and the control circuit uses micro-power components to realize current and voltage isolation and conversion with a photocoupler. Constants, integral constants, and differential constants are adjusted using a PID adapter. The governor is small in size and light in weight. It can be used alone or directly on adc motor speed control system to form an integrated DC speed-regulating motor. It can have all the functions that the governor should have.
The application of dc motor speed control system, the rapid development of modern industrial automation also provides a wide range of applications and updates for the application of dc motor speed control system: such as remote signal transmission, remote speed regulation, remote control speed control and control of high temperature environment, manual automatic integration.

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Gear Lubricants knowledge introduction

Gear Lubricants knowledge introduction
Bevel gear, helical gears ,cylindrical gear (SPUR GEARS),spiral bevel gear,worm snail bar (WORM & WORM WHEELS),reducer (SPEED REDUCERS) / gearbox, etc.
Gear Lubricants referred gear oil, which is mainly used to lubricate the various mechanical gears.Gear oils and engine lubricants, as also the group consisting of mineral oil type (or synthetic) base oil and additives corresponding
A. Gear oils and gear oil can be divided into two categories industrial gear oils.
Gear oil Introduction
Vehicle gear oil is mainly used in automobile, engineering machinery transmission, steering, front and rear drive axle. Gearbox, universal joints needle bearings and other parts, but also for tanks, ships, and the corresponding load and working conditions
Gear member. Industrial gear oil is mainly used to open under various load conditions, semi-open, closed and Worm gear.
First, the gear oil working conditions and its role:
A variety of mechanical transmission gear mechanism, according to its different axes of the mutual positional relationship can be divided into parallel Shaft drive, intersect and cross shaft drive shaft drive. According to the shape of each type of transmission in different gears and teeth have different
Transmission methods, such as parallel shaft drive spur gears, helical gears, spur gears herringbone; Intersecting axis drive straight bevel gears, helical bevel gears, spiral bevel gears; staggered shaft drive has hyperbolic
Gears, worm, helical gear.
1. gear characteristics and working conditions of gear oil
    (1) high-efficiency gear, generally cylindrical gear transmission efficiency up to 98%, compared with the bearing, gear
Equivalent curve radius wheel is small, wedge poor conditions.
    (2) gear tooth is in line contact with the teeth, and therefore, the contact area, contact pressure units high.
General Automotive gear unit contact pressure up 2000-3000MPa, while higher hypoid gear up to
3000 a 4000MPa.
    (3) gear not only line contact, there is sliding contact, especially between the hypoid gear, tooth
They have a higher relative sliding velocity, generally up to about 8m / o. This is in the high speed high load conditions, will
Thin film and even a partial rupture, leading to increased friction and wear, and even cause abrasions and bite.
    (4) gear oil operating temperature is generally lower than the internal combustion engine oil, in large part with the ambient temperature changes
Changes, vehicle gear oil temperature is generally not higher than 100'C. Modern cars use hypoid gear, its axis
Line a large offset high gear side will ask the vehicle speed is high relative sliding speed, the oil temperature reaches
160'C a 180'C.
2. The role of gear oil in the gear
   (1) reduce wear gears and other moving parts, prolong gear life.
   (2) reduce friction, reduce power loss.
   (3) dispersing the heat, since a certain cooling effect.
   (4) to prevent corrosion and rust.
   (5) reduces operating noise and reduce vibration and shock effect between gears.
   (6) washing the dirt, especially among rushed tooth surface dirt, reducing wear and tear.
Second, the gear oil properties:
The purpose of the use of different gear oil, conditions of use varies widely with its performance as follows Claim:
    1. Good oil and extreme pressure anti-wear
    Oily refers gear oil can effectively adsorb oil film lubrication between moving surfaces, have lower
The nature of the low friction. Abrasion resistance refers to the oil held in the oil film between the moving parts, can effectively prevent the metal
Direct contact between the ability to add some of the active substance with polar molecules in the gear oil can improve its oil
Sex, oxides of these oily agents polar end and the metal surface adsorption occurs, to form a strong oily
Membranes, polar end oiliness agent may also form a metal soap type lubricant film and the metal oxide surface, to strengthen the tooth
Wheel lubrication oil, to prevent direct contact tooth surface, to reduce friction, thereby reducing wear. Some of the gear transmission
Move, often working under extreme pressure lubrication harsh conditions, the pressure, sliding speed and local temperatures
High, which requires adding extreme pressure gear oil additives. Extreme pressure additives are typically chemically active
Parathion, parathion chlorine-type or oil-soluble zinc compounds, these additives at high temperature and pressure conditions and extreme metal tooth shape
To iron chlorine, sulfur, phosphorus compounds or complexes, to form a high melting point of the inorganic film, this film has a very
Extreme pressure resistance properties, but also have the role of resistance to shock loading, can be effectively prevented under high load conditions
Tooth surface scratches and bite.
2. Good viscosity-temperature characteristics
      All kinds of lubricating oil viscosity decreases with increasing temperature, the smaller the proportion of decline, its viscosity-temperature performance
The better. Especially in the automotive and construction machinery gear oil operating temperature range varies greatly, therefore, hope that the gear oil
Viscosity change with temperature as low as possible. Gear oil viscosity-temperature characteristics as well, when you start the viscosity is too large,
Easy to start, and run to a temperature high limit viscosity is too small. Viscosity gear oil is also important usability
One great energy, viscosity influence on the formation of the oil film. In general, high viscosity gear oil can effectively prevent the gear
And bearing damage, reduce noise and minimize leakage mechanical operation; low-viscosity oil to improve the operating efficiency of machinery plus
Transmission is stronger cooling and cleaning action and the oil has an advantage. In order to reduce fuel consumption, foreign introduced hair
Engine oil, gear oil of low viscosity. The advantages of low viscosity gear oil agitating resistance is small gear teeth, and
Has good low temperature fluidity, at low temperature to ensure lubrication. In recent years, the country has produced some of the low viscosity
Degree of gear oil, in order to change its lubricating properties and Poor's added some pleiotropic additives which reduce power loss
Is very favorable. Of course, in the use of its body, to strengthen the gear box sealed to prevent gear oil
Leakage.
3. Good low temperature fluidity
    Automotive gear oil requirements at low temperatures can maintain the necessary fluidity, if the gear oil at a low temperature strip
Lower member wax precipitation, a sharp rise in viscosity, it can not ensure effective lubrication, low temperature start torque is increased, so that
Was an increase in fuel consumption.
   Tests showed low apparent viscosity gear oil lubrication reliability of the vehicle starting an important shadow
Ring. Inflows driving bevel gear axle vehicles after the start, rear axle (front axle) gear oil is Jijian to upper rear axle housing
Cheng, when asked if this is too long, there may be due to lack of oil bearing burned. Therefore, the requirements of the vehicle so that the gear oil
With the apparent viscosity at low temperature of not more than 1.5X100000mPa.s. Vehicle gear oil specifications apparent bid out
1.5X100000mpa.s temperature viscosity when it determines the gear oil for the minimum temperature, the election
One important basis for gear oil used. In order to be able to adapt to the requirements of gear oil under low temperature in winter conditions, tooth
Round to join the oil pour point depressants, to improve its low temperature fluidity.
4. Good thermal oxidation stability
     Gear oil under severe operating conditions, in air, water and metal catalyzed oxidation rate
Accelerate, the viscosity increases, resulting insolubles and corrosive substances and resin and asphaltene, nature deterioration and easy milk
Technology and produce foam, so Huanyouzhouqi shortened. To retard oxidation gear oils, typically added phenol in oil,
Amine or curing type antioxidant additives.
5. Good rust and corrosion
   Rust resistance refers to the gear oil to protect gear from corrosion, thus ensuring performance and prolong gear so
Life. Gear during operation, the moisture in the air condenses into water gearbox, thus requiring gear
Oil should have good rust resistance. In order to enhance rust resistance gear oil, generally added salt or salts of fatty acids
And other anti-corrosion additives. Plus there is extreme pressure gear oil additives, extreme pressure additives due to sulphide, sulfur on copper
Easy to produce corrosion, therefore, to join in the gear oil in anti-corrosion additives, which can form on the metal surface protection
Protective film to prevent corrosion of metal corrosive substances.
6. Good anti-foam
   Gear oils requires a good anti-foam to ensure under operating conditions, intense stir in gear
Mixing process produces less foam and easy to disappear.

The Holiday of Labors Day

We will have a holiday for The Labors Day from 1st to 3rd May. and will get back to work on 4th. During this time, all our sale department will have limit access to check emails or others.

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ZLYJ extruder gearbox manual chapter one

I. Introduction
ZLYJ reducers are a kind of high-precision rigid gear assembly specially designed for the single-screw plastic/rubber extruder. Taking the JB/T 8853-2001 Cylindrical Gear Reducer as a reference for design, the products applies the high-strength low-carbon alloy steel for gears and gear shaft, with tooth flank carbureted, quenched and ground, to meet the gear precision at Level 6 (GB/T 10095) and hardness of tooth flank HRC54~62. A huge thrust bearing is mounted on the front of the output shaft to bear the thrust from the screw.

II. Use Scope
 The input rotation of prime mover shall be ≤ 1500 rpm.
 The peripheral speed of gear drive shall be ≤ 20m/s.
 The working ambient temperature shall be within -40℃~45℃. Preheat the lubricating oil to above 0℃ or choose the low temperature lubricating oil when the ambient temperature is below 0℃.

Note:
 Rotation is available both forwards and backwards. However, the high-speed shaft of some types of reducers has a single-way oil pump directing as defaulted to the output shaft which rotates clockwise.


III. Reducer Types
Product nameplates: When delivered, all reducers are attached with nameplates to specify the type, capability, production date, ex-factory number and other features for the purpose of maintenance, which shall not be removed at random.
Nameplate explanation:

ZLYJ

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ZLYJ EXTRUDER GEARBOX MANUAL CHAPTER THREE

VII. Fault Analysis and Solutions

Faults

Causes

Solutions

 

Faults

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The characteristics and application of dc motor

The characteristics and application of dc motor:

    Main advantages: Compared with AC three-phase asynchronous motor, the characteristics and application of dc motor has good starting characteristics and speed regulation characteristics, the characteristics and application of dc motor ,which is convenient for speed regulation. Therefore, for the production machinery with high starting and speed regulation performance, DC motor drive is often used.The characteristics and application of dc motor main disadvantage: you need to configure the DC power supply, the price is relatively expensive.

The characteristics and application of dc motor:

   1) When the production machine needs to maintain a constant speed under different load conditions and the speed can be adjusted, a DC motor can be used. For example, a shunt DC motor can be used to drive a grinding machine, a planer, and the like.

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Contacts

NER GROUP CO.,LIMITED

Mobile Phone: +86-18563806647

Tel: +86-535-6330966 (24×7 message available)

Viber/Line/Whatsapp/Wechat: 008618563806647

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ZLYJ EXTRUDER GEARBOX MANUAL CHAPTER TWO

Attention:

      ◇ Cut off and prevent (by a warning tag, etc.) the re-connection of power supply to the motor before installing the couplings.

      ◇ Striking by hammer or other similar tools is not allowed when mounting the couplings and small gears onto the shaft end.

      ◇ Ensure the correct tension of belt when installing belt wheel.

              ◇ Do not install or uninstall the screw by force in respect of the output part.

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Main Catalogue Overview

-gearbox-catalog
-gear-reducer-catalog
-inline-gear-motor
-crane-gearmotor-gear-reducer
-cycloidal-gearmotor
-worm-reducer-gearmotor
-electric-motor-factory
-industrial-gearbox-speed-reducer
-flender-gearboxes
-extruder-gearbox-plastic-industry
-gear-reducers
speed-reducer-factory

Customer Reference

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The helical gear advantages and disadvantages

The helical gear advantages and disadvantages is a novel reduction gearing. It has many advantages, such as

Small size and light weight. Thanks to the optimized cash design concept, the weighted average of the performance makes the advantages complement each other. The transmitted torque is increased, the transmission ratio is finely graded, the load carrying capacity is enhanced, the use is durable, and the economy is good.


1. The helical gear advantages and disadvantages
The involute helical gear reducer has the characteristics of small size, light weight, high bearing capacity, high efficiency, long service life, convenient installation, wide motor power range and fine classification of transmission ratio. Can be widely used in equipment that needs to be decelerated in various industries.


2,The helical gear advantages and disadvantages
The helical gear worm reducer adopts the direct connection mode of the motor, and the structure is a first stage helical gear plus a first stage worm gear transmission.move. The helical gear advantages and disadvantages,The output is shaft mounted and comes in six basic mounting styles. It can be reversed and reversed. The helical gear adopts hard tooth surface, stable operation, large carrying capacity, working environment temperature -10 °C ~ 40 °C. The helical gear advantages and disadvantages。This product has the characteristics of large speed variation range, compact structure and convenient installation compared with similar products. Can be widely used in metallurgy, mining, lifting, light industry, chemical, transportation, construction and other mechanical equipment speed reduction mechanism.

The helical gear advantages and disadvantages,gears are one of the most important components in large-scale industrial equipment. A very important application of helical gear spur gear transmission. The helical gear advantages and disadvantages transmission has good meshing performance, which makes the transmission process tend to be stable and the noise is small. It has the advantages of relatively large coincidence degree, relatively low load between teeth, thereby improving the ability of the gear to withstand pressure, and the like. Helical gear transmission has important applications in the field of life and production. The helical gear advantages and disadvantages.Through the understanding of the characteristics and application of the helical gear transmission, we have a deeper understanding of the helical gear transmission and facilitate future use. The helical gear reducer is a novel reduction gearing. It adopts the advanced design concept of the optimized module combination system. The helical gear advantages and disadvantages.It is a helical gear reducer with small size, light weight, large transmission torque, stable starting, fine transmission ratio, and can be connected according to user requirements and various installation positions. The helical gear advantages and disadvantages,and the carrying capacity is strong and durable.

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Which of the following is not an advantage of helical gears

which of the following is not an advantage of helical gears.Both high-power gear reducers and low-power gear reducers use helical gears. In some cases, helical gears have an irreplaceable role; let us analyze the characteristics and shortcomings of the lower helical gears:

 which of the following is not an advantage of helical gears. The characteristics of the helical gear: the number of teeth without root cutting is small; the degree of coincidence is large, the load of each pair of gears is reduced, and the bearing capacity of the gear is improved;which of the following is not an advantage of helical gears, the meshing property is good, the transmission is stable, and the noise is small.

  which of the following is not an advantage of helical gears.Disadvantages of the helical gear: compact structure, when the helical gear is cut with a rack-shaped cutter, the number of small teeth without the undercut gear is less than that of the spur gear, so that a more compact structure can be obtained; the degree of coincidence is large, Under the same conditions,which of the following is not an advantage of helical gears, the meshing process of the helical gear is longer than that of the spur gear, that is,which of the following is not an advantage of helical gears, the coincidence degree is large, which reduces the load capacity of each pair of gears, thereby improving the bearing capacity of the gear, prolonging the service life of the gear, and making the transmission smooth. The manufacture of herringbone gears is cumbersome, the manufacturing process is complicated, and the cost.

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How to select the gear reducers model correctly?

Selection of general speed reducer includes condition, select the type, determine the specifications and other steps.
In contrast, the type selection is more simple, while providing accurate reducer working conditions, master reducer design, manufacture and use of key common feature is a reasonable choice reducer correct specifications. Specifications choose strength, thermal equilibrium, the shaft extension portion radial load and other conditions to be met.


1. Selecting by mechanical power or torque (strength checking)
The biggest difference is GM reducer and special reducer design selection process is that the former applies to all sectors, but the deceleration only by a particular design of working conditions, so users need to consider the selection of different correction coefficients according to individual requirements plant selection should be based on the actual motor power (not the gear unit rated power) play nameplate; the latter according to the user's special conditions designed to consider factors that, the design has been made generally considered, as long as the selection using a power less than or equal reduction The power rating can be, the method is relatively simple.
2. the heat power balance checking
Universal reducer allowable thermal power values are (under normal ambient temperature of 20 ℃, per hour, 100%, continuous operation, the power efficiency of 100%), the maximum allowed by the lubricant equilibrium temperature (usually 85 specific working conditions ℃) determined. The condition is not at the same time pressing the corresponding coefficient (sometimes integrated into a coefficient) be amended.
3. Checking shaft extension portion bear radial load
Universal reducer often required to input shaft, an output shaft extending middle part withstand the maximum allowed radial load to be limiting and should be checked, the manufacturer shall propose bold and increase the bearing shaft diameter exceeds requirements.

Which of the following transmission gear ratios reduces transmission output shaft speed the most

The gearbox is composed of a shifting transmission mechanism and a shifting operating mechanism. The main function of the variable speed transmission mechanism is to change the value and direction of the torque and speed; which of the following transmission gear ratios reduces transmission output shaft speed the most,the main function of the operating mechanism is to control the transmission mechanism to realize the transformation of the transmission ratio, that is, to realize the shifting to achieve the variable speed torque.which of the following transmission gear ratios reduces transmission output shaft speed the most

The simple transmission has the advantages of high efficiency, simple structure and convenient use, but the number of gears is small, and the range of i change is small (traction force and speed range are small), which of the following transmission gear ratios reduces transmission output shaft speed the most,and it is only suitable for some turners with few gears. If the range of i is increased, the size of the transmission is increased, and the shaft span is increased. In order to increase the number of steps without making the shaft span too large, a component type transmission can be used.which of the following transmission gear ratios reduces transmission output shaft speed the most. The so-called component transmission is usually composed of two simple transmissions,which of the following transmission gear ratios reduces transmission output shaft speed the most, wherein the number of gears is called the main transmission, and the less is called the auxiliary transmission.


The mechanical gearbox mainly uses the principle of gear reduction. which of the following transmission gear ratios reduces transmission output shaft speed the most.To put it simply, there are multiple sets of gear pairs in the gearbox, and the shifting behavior when the car is running, that is, the different gear pairs in the gearbox are operated by the operating mechanism. For example, at low speeds, let the gear ratio work with a larger gear pair, and at high speeds, let the gear ratio work with a smaller gear pair.

which of the following transmission gear ratios reduces transmission output shaft speed the most
1. Accelerated deceleration, which is often referred to as the variable speed gearbox.
2. Change the direction of the drive. For example, we use two sector gears to transmit the force vertically to the other.
3. Change the turning moment. Under the same power condition, the faster the speed turns, the smaller the torque the shaft receives, and vice versa.
4. Clutch function: We can separate the engine from the load by separating the two originally meshed gears, such as brake clutch.
5. Distribute the power. For example, we can use one engine to drive multiple slave shafts through the gearbox main shaft, thus realizing the function of one engine to drive multiple loads.

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Why is backlash required between meshing gears

why is backlash required between meshing gears.Engagement refers to a transmission relationship between two mechanical parts, called an engagement drive. Gear transmission is the most typical meshing transmission and is the most widely used form of transmission. why is backlash required between meshing gears.According to the different transmission principle, there are spur gear meshing transmission and helical gear meshing transmission.


Gear meshing transmission has the characteristics of large adaptability range, high transmission efficiency, long working life, stable transmission, high reliability, constant instantaneous transmission ratio, and can realize various position requirements. It is used in modern mechanical transmission. Very extensive. why is backlash required between meshing gears.It consists of a drive gear, a driven gear and a frame. Through the meshing action of the gears, the movement and power of the driving wheel (shaft) are transmitted to the driven (shaft), and the required rotational speed and torque are obtained.

why is backlash required between meshing gears
(1) Advantages: It can adapt to a wide range of speed and power transmission. Its peripheral speed can be from very low to as high as 300m / s; high transmission efficiency, long working life, smooth transmission, high reliability; can ensure a constant instantaneous transmission ratio;why is backlash required between meshing gears, can achieve two-axis transmission of various position requirements.
(2) Disadvantages: The two wheels must be in contact, so it is not suitable for transmissions with large distance between shafts; the precision for manufacturing and installation is high, otherwise large noise will be generated.

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The electric motor gear reduction calculator

The electric motor gear reduction calculator

1. The geared motor is manufactured in accordance with international technical requirements and has a high technological content.
2. Compact structure, reliable and durable, with high overload capacity and high power.
3, low energy consumption, superior performance, reducer efficiency of up to 95%.The electric motor gear reduction calculator.


4, low vibration, low noise, high energy saving, high-quality segment steel material, steel cast iron box, high-end gear reducer motor uses special aluminum alloy die-casting box, the gear surface is subjected to high-frequency heat treatment.The electric motor gear reduction calculator.
5. After precision machining to ensure positioning accuracy, the gear reducer of the gear reducer of the reducer can be configured with all kinds of mainstream motors in the market, forming a new product feature of mechatronics and modular structure, which fully guarantees the quality characteristics of the product.
6. The product adopts serialized and modular design ideas, has wide adaptability, can be combined with various types of motors, installation positions and structural schemes, The electric motor gear reduction calculator and the gear reducer can select any speed and various structural forms according to actual needs.


The electric motor gear reduction calculator Gear reducer features:
1. The gear reduction motor is manufactured according to the technical requirements of the national professional standard ZBJ19004;
2, space saving, reliable and durable, The electric motor gear reduction calculator,with high overload capacity, power up to 95KW or more;
3, low energy consumption, superior performance, the efficiency of the reducer is as high as 95% or more;
4, low vibration, low noise, high energy saving, the selection of high-quality segment steel material, steel cast iron box, the gear surface after high-frequency heat treatment;The electric motor gear reduction calculator.
5, through precision machining to ensure positioning accuracy, all of which constitute the gear transmission assembly gear reduction motor is equipped with various types of motors, forming a mechanical and electrical integration, fully guarantee the quality characteristics of the product;
6, the product uses a series of, modular design ideas, has a wide range of adaptability, this series of products have a large number of motor assembly installation, installation location and structural solutions, you can choose any speed and various structural forms according to actual needs.


The electric motor gear reduction calculator is widely used, and it is an indispensable power transmission equipment for automatic mechanical equipment, especially in printing machinery, corrugated machinery, packaging machinery, conveying machinery, food machinery, color box machinery, automatic storage, three-dimensional warehouse, three-dimensional parking.The electric motor gear reduction calculator Field equipment, textile, dyeing and finishing, chemical and other equipment.

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How does an electric motor work physics

An electric motor is a rotary electric machine that converts electrical energy into mechanical energy.How does an electric motor work physics. It mainly consists of an electromagnet winding or distributed stator winding for generating a magnetic field and a rotating armature or rotor. How does an electric motor work physics.Under the action of the rotating magnetic field of the stator winding, it has a current passing through the effective side of the stator winding and is rotated by the action of the magnetic field.

According to the principle of motor reversibility, if the motor does not change its structure, the motor is used as a motor and can also be used as a generator.How does an electric motor work physics. It is a machine that converts electrical energy into mechanical energy. Usually, the work part of the motor is rotated. This type of motor is called a rotor motor.How does an electric motor work physics. It is also called a linear motor.
The most widely used of various motors is an AC asynchronous motor (also known as an induction motor).How does an electric motor work physics. It is easy to use, reliable in operation, low in price, and firm in structure, but with low power factor and difficult speed regulation. Synchronous motors are commonly used in high-capacity, low-speed power machines (see Synchronous Motors).How does an electric motor work physics. The synchronous motor not only has a high power factor, but its speed is independent of the load and is determined only by the grid frequency.

The work is more stable. DC motors are often used where wide-range speed regulation is required.How does an electric motor work physics. However, it has a commutator, which is complicated in structure, expensive, difficult to maintain, and unsuitable for harsh environments. How does an electric motor work physics.After the 1970s, with the development of power electronics technology, the speed control technology of AC motors has gradually matured, and the price of equipment has been decreasing, and it has begun to be applied.

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The list of gearbox manufacturing companies

(1) Drive gear and driven gear.  The list of gearbox manufacturing companies.The input shaft can be understood as being connected to the clutch and rotating under the driving of the engine. The gear fixed on the input shaft rotates synchronously. The gear is called the driving gear, and the gear connected to the output shaft is forced to rotate. This gear is called a driven gear.
(2) Transmission ratio i. The list of gearbox manufacturing companies.The ratio of the number of teeth of the driven gear to the number of teeth of the driving gear is defined as the gear ratio.


When the relationship between the number of teeth of the driven gear and the number of teeth of the driving gear changes, the transmission ratio i changes, and under the condition that the engine speed does not change, the output shaft speed change, that is, the wheel speed changes. The list of gearbox manufacturing companies.A pair of intermeshing gears does not change in the number of teeth used, so its gear ratio is fixed. If a plurality of gears of different numbers of teeth are mounted on the input shaft and the corresponding number of teeth on the output shaft is also a variable gear meshing, a set of stepped transmissions having different gear ratios i can be obtained.The list of gearbox manufacturing companies. The car transmission is based on this basic principle to achieve shifting shifting.
(3) Forward gear, a gear that can drive the car forward. Reverse gear, which can make the car reverse the driving position. In the neutral position, the gears in the transmission are not in the working position. The list of gearbox manufacturing companies.At this time, after the engine power is input to the input shaft, it is no longer transmitted to the output shaft.
(4) Direct file. The engine power is transmitted through any gear in the transmission, but the gear output directly through the transmission input shaft and the output shaft directly connected thereto is called direct gear.The list of gearbox manufacturing companies. The direct gear ratio is 1.


(5) Overspeed gear. That is, the output shaft speed is higher than the input shaft speed.
(6) Number of files. Refers to the number of gear positions in a stepped gear transmission. The number of gears in common gear transmissions is four to five, and the three-speed transmission is rare. The list of gearbox manufacturing companies.The more the number of gears, the better the car's adaptability to driving conditions, and the lower the fuel consumption, but the more complicated the transmission transmission mechanism and the operating mechanism, the more difficult it is to operate and the higher the cost.
(7) Low grade, high grade. In the gear position of the transmission, the small number of gears is called low gear, the smaller the gear, the larger the gear ratio, the greater the traction, and the lower the speed.The list of gearbox manufacturing companies. For example, the gear ratio of the first gear is the largest in the forward gear, the lowest speed and the highest traction. The digital gear is called high-grade, the larger the number, the smaller the gear ratio, the smaller the traction, but the higher the speed.


(8) Shifting. The shifting process of the transmission to complete the gear ratio is called shifting. The list of gearbox manufacturing companies.The shifting of the sleeve is performed by integrating with the gear, and the engaging ring ring on the flank and the engaging sleeve are engaged (or separated) to realize a gear ratio change called a sleeve shift. The synchronizer shifts and uses the synchronizer to shift gears. The list of gearbox manufacturing companies.The shifting not only has no impact and noise on the engaging teeth but also a short shifting time.
(9) Jumping. The list of gearbox manufacturing companies.During the running of the car, due to the wear and vibration of the engaging teeth, the clutch sleeve and the engaging ring gear are separated to make the transmission in a neutral state.

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The difference between single stage and two stage gearbox

The difference between single stage and two stage gearbox

1, structurally different

The three-axle transmission has three shafts, and the two-shaft transmission has two shafts; the input shaft and the output shaft of the two-shaft transmission are not on the same axis, and the two shafts are the first shaft (input shaft) and the second shaft (output) axis).

The first axis is the driven shaft of the clutch, the second shaft is the main shaft of the main reducer, and the single-stage shifting is used by the car due to its small size. The difference between single stage and two stage gearbox.Unlike the two-shaft transmission, the input shaft and the output shaft of the three-shaft transmission are on the same axis, one more intermediate shaft than the two-shaft transmission, and is a two-stage shift. Due to the large torque generated, the body is large and mostly used by heavy-duty vehicles.

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The design and analysis of a two stage reduction gearbox

The external gear of the wind power gear box generally adopts a carburizing and quenching grinding process. The design and analysis of a two stage reduction gearbox.The introduction of high-efficiency and high-precision CNC forming gear grinding machines has made our foreign gear finishing level not much different from that of foreign countries. There is no difficulty in achieving the 5-level precision technology specified by the 19073 standard and the 6006 standard. The design and analysis of a two stage reduction gearbox. However, there are still gaps between China's advanced technology in heat treatment deformation control, effective layer depth control, tooth surface grinding tempering control, and gear tooth shaping technology.


Due to the large size of the ring gear of the wind turbine gearbox and the high processing precision,  The design and analysis of a two stage reduction gearbox.the manufacturing technology of the inner ring gear in China is quite different from the international advanced level, which is mainly reflected in the gear processing and heat treatment deformation control of the helical internal gear.


The machining accuracy of the structural parts such as the box body, the planet carrier and the input shaft has a very important influence on the meshing quality of the gear transmission and the bearing life.  The design and analysis of a two stage reduction gearbox.The quality of the assembly also determines the length of the wind turbine gearbox and the reliability. . China has realized from the importance of the processing and assembly precision of structural parts that there is a certain gap between the level of equipment and the advanced level of foreign countries.  The design and analysis of a two stage reduction gearbox.The acquisition of high-quality, high-reliability wind turbine gearboxes, in addition to advanced design techniques and necessary manufacturing equipment support, is inseparable from the strict quality control of every step of the manufacturing process.  The design and analysis of a two stage reduction gearbox.The 6006 standard provides strict and detailed regulations on the quality assurance of the gearbox.


The lubrication system of the gearbox is very important for the normal operation of the gearbox.  The design and analysis of a two stage reduction gearbox.The large wind turbine gearbox must be equipped with a reliable forced lubrication system to inject the oil to the gear meshing area and bearings.  The design and analysis of a two stage reduction gearbox.In the cause of the failure of the gearbox, the lack of lubrication accounted for more than half.  The design and analysis of a two stage reduction gearbox.Lubricating oil temperature is related to component fatigue and overall system life. Generally speaking, the maximum oil temperature of the gearbox should not exceed 80 °C during normal operation, and the temperature difference between different bearings should not exceed 15 °C. The design and analysis of a two stage reduction gearbox.When the oil temperature is higher than 65 °C, the cooling system starts to work; when the oil temperature is lower than 10 °C, the oil should be heated to the predetermined temperature and then turned on.

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