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Helical bevel gear reducer

Wednesday - 07/10/2020 04:56
Our RV series is a bevel gear reducer with a high-strength cast iron case. This series of reducer is designed and manufactured on the basis of modular combination system. There are many motor combinations, installation forms and structural schemes.
Helical bevel gear reducer
The transmission ratio is finely graded to meet different working conditions, realize electromechanical integration, high transmission efficiency and low energy consumption superior performance. RV series spiral bevel gear reducer ofthe hard tooth surface gear is made of high quality alloy steel, the surface is hardened by carburizing and quenching, the grinding teeth are finely processed, the transmission is stable, the noise is low, and the bearing capacity is large. Low temperature rise and long life. Widely used in industrial metallurgical equipment, building materials industry, chemical, mining, petroleum, transportation, paper, sugar, engineering machinery, etc.

What are the working principles of the speed reducer? In fact, (speed reducer) reducer is simply to increase the torque to reduce the speed! The reducer is generally used for transmission equipment with low speed and high torque. The motor, internal combustion engine or other high-speed power is driven by the gears with few teeth on the input shaft of the reducer to mesh the large gear on the output shaft to achieve the purpose of deceleration. The reducer will also have several pairs of identical principle gears to achieve the desired deceleration effect.

The ratio of the number of teeth of the large and small gears is the transmission ratio. Reducer products have a wide range of applications. Food light industry, electric machinery, construction machinery, metallurgical machinery, cement machinery, environmental protection machinery, electronic appliances, road construction machinery, water conservancy machinery, chemical machinery, mining machinery, transportation machinery, building materials machinery, rubber machinery, petroleum machinery and other industries.

The following are commonly used helical bevel gear reducer classifications:

1. Hard tooth surface helical gear reducer
2. small micro gear reduction
3. hard tooth surface cylindrical gear reducer
4. Planetary gear reducer (servo planetary reducer)

The ring gear is fixed, the sun gear is active, and the planet carrier is passive. As can be seen from the demonstration, this combination is a speed reduction transmission, usually the transmission ratio is generally 2.5 to 5, and the steering is the same. Soft tooth surface reducer 5, three ring reducer 6, crane three-in-one reducer 7, worm gear reduction 8, shaft mounted hard surface reducer 9, stepless speed changer. The main feature of the helical bevel gear reducer is the reverse self-locking function. Our reducer can achieve the oil-free export quality. The worm gear reducer can have a large reduction ratio. The input shaft and the output shaft are not on the same axis. Not on the same plane. However, the volume is generally large, the transmission efficiency is not high, and the accuracy is not high.

The harmonic drive of the harmonic reducer is the elastic deformation controlled by the flexible element to transmit motion and power. The volume is small and the precision is high, but the disadvantage is that the flexible wheel has limited life and is not impact resistant. The rigidity is compared with the metal parts. difference. The input speed cannot be too high. The planetary reducer has the advantages of compact structure, small return clearance, high precision, long service life and large rated output torque. But the price is slightly more expensive. Fault handling Due to the poor operating environment of the reducer, there are often faults such as wear and leakage. The most important ones are:

1. The bearing chamber of the reducer is worn, which in turn includes the wear of the bearing housing of the housing, the bearing chamber of the housing, and the bearing chamber of the transmission;

2. The shaft diameter of the gear shaft of the reducer is worn, and the main wear parts are in the shaft head and keyway;

3. The bearing position of the reducer drive shaft is worn;

4. The reducer joint surface leaks.

According to different types of reducers, the industry I have done is a relatively traditional worm gear and hardened gear reducer. The general principle of these two reducers is achieved by friction drive and rolling drive. Common worm gear drive It is driven by friction, which is realized by rolling the worm, meshing the worm wheel and intermediate friction, so the transmission efficiency is low (the friction will generate heat). Because of the friction, the service life is relatively short (wearing), and the hard-toothed gear The reducer is driven by rolling, so the efficiency will be high, except for the S series, because the S series is friction + rolling combined.

Throughout all the reducers, there are two working principles of friction and rolling, but how to achieve the specifics. The following is a rough classification of the working principle of the reducer that I understand. If there are errors and deficiencies, please correct the friction drive with worm gear. Reducer, S series hardened surface reducer (middle part) rolling drive, R, F series hardened reducer (parallel rolling); K series hardened reducer (bevel gear rolling drive + parallel rolling) planetary reduction Machine (planetary rolling mode) cycloidal pinwheel reducer (planetary rolling) harmonic reducer, etc.  Due to the harsh operating environment of the reducer, there are often faults such as wear and leakage. The main ones are:

1. The bearing chamber of the reducer is worn, which in turn includes the wear of the bearing housing of the housing, the bearing chamber of the housing, and the bearing chamber of the transmission;
2. The shaft diameter of the gear shaft of the reducer is worn, and the main wear parts are in the shaft head and keyway;
3. The bearing position of the reducer drive shaft is worn;
4. The reducer joint surface leaks.

For the leakage problem, the traditional method needs to disassemble and open the reducer, replace the sealing gasket or apply the sealant, which is not only time-consuming and laborious, but also difficult to ensure the sealing effect, and leakage will occur again during operation. The polymer material can be used to treat leakage on site. The material has excellent adhesion, oil resistance and 350% elongation, which overcomes the impact caused by the vibration of the reducer, and solves the problem of leakage of the reducer for the enterprise.

NMRV worm gear reducers, also known as RV reducers, are from Italy, and before 2014, users were used all over the world. However, with the rise of automation equipment, the precision and wear resistance of the reducer are very high. The precision and wear resistance of the
NMRV worm reducer are beyond control. However, NMRV worm gear reducers are still very popular on many mechanical devices, so there are still many fans for their small size and multi-directional installation optimization. The 025 specification models are: NMRV025 reducer and NRV025 reducer, which is the smallest of the NMRV worm gear reducers. The volume is only as large as the palm of an adult, but the price is not the cheapest. Many people think that the reducer with a small size is cheaper. Because of its small size, it will be more complicated in manufacturing.

The speed reducer combines the speed of rotation and the transmission of torque between the prime mover and the working machine or the actuator, and is widely used in modern machinery. According to the application, the reducer can be divided into two types: universal reducer and special reducer. The design, manufacture and use characteristics of the two are different. The reducer is a separate closed transmission between the prime mover and the working machine. It is used to reduce the speed and increase the torque to meet the working needs. In some cases, it is also used to increase the speed, called the speed increaser.

When selecting the reducer, according to the selection conditions of the working machine, technical parameters, performance of the power machine, economy and other factors, compare the outer dimensions of different types and types of reducers, transmission efficiency, price, etc., select the most suitable reducer. The reducer is a relatively precise machine that is used to reduce the speed and increase the torque development trend: In the 1970s and 1980s, the world's reducer technology has developed greatly and is closely integrated with the development of the new technological revolution. The development trend of universal reducers is as follows:

1. High level and high performance:

Cylindrical gears generally adopt carburizing and quenching, grinding teeth, and the bearing capacity is increased by more than 4 times. The volume is small, the weight is light, the noise is low, the efficiency is high, and the reliability is high;

2. Building block combination design:

The basic parameters use the priority number, the size specifications are neat, the parts are versatile and interchangeable, the series is easy to expand and the pattern is refurbished, which is conducive to organizing mass production and reducing costs.

3. The variety of types, variant design:

Get rid of the traditional single base installation, add hollow shaft suspension, floating support base, motor and reducer integrated connection, multi-directional mounting surface and other different types, expand the scope of use . The main factors driving the increase of the speed reducer are:

1. The theoretical knowledge is becoming more and more perfect, and it is closer to reality (such as gear strength calculation method, shape modification technology, deformation calculation, optimization design method, root smooth transition, new structure, etc.);
2. the use of good materials, the general use of a variety of high-quality alloy steel forgings, material and heat treatment quality control level;
3. The structure design is more reasonable;
4. The processing accuracy is improved to ISO5-6 level;
5. bearing quality and life expectancy;
6. The quality of lubricating oil is improved.

Features:

The gear reducer has the characteristics of small size and large transmission torque. The gear reducer is designed and manufactured on the basis of the modular combination system. There are many motor combinations, installation forms and structural schemes. The transmission ratio is finely graded to meet different working conditions and realize electromechanical integration. The gear reducer has high transmission efficiency, low energy consumption and superior performance. The cycloidal pinwheel reducer is a transmission type that adopts the principle of cycloidal pin gear meshing planetary transmission. It is an ideal transmission device with many advantages, wide application and forward and reverse operation. Analysis of the reasons for the oil leakage of the reducer:

1. The pressure difference between the inside and outside of the reducer:

During the operation of the reducer, the friction of the motion pair is heated and affected by the ambient temperature, so that the temperature of the reducer rises. If there is no vent hole or the vent hole is blocked, the pressure inside the machine gradually increases. The higher the internal temperature, the greater the pressure difference from the outside, and the lubricating oil leaks from the gap under the pressure difference.

2. The structure design of the reducer is unreasonable.

1) Check that the hole cover is too thin, and it is easy to deform after tightening the bolt, so that the joint surface is not flat and oil leakage from the contact gap;
2) During the manufacturing process of the reducer, the casting is not annealed or aging treated, the internal stress is not eliminated, deformation is inevitable, and a gap is generated, resulting in
leakage;
3) There is no oil return tank on the tank, and the lubricating oil accumulates in the shaft seal, the end cover, the joint surface, etc., and leaks from the gap under the pressure difference;
4) The design of the shaft seal structure is unreasonable

3. Too much fuel:

During the operation of the reducer, the oil pool is agitated very much. The lubricating oil splashes everywhere in the machine. If the amount of oil is too much, a large amount of lubricating oil will accumulate in the shaft seal, joint surface, etc. Causes a leak.

4, improper maintenance process:

In the equipment maintenance, due to the incomplete removal of dirt on the joint surface, or the improper selection of sealant, the direction of the seal is reversed, the seal is not replaced in time, etc. will also cause oil leakage. The reducer is a separate component consisting of a gear drive, a worm drive, and a gear-worm drive enclosed in a rigid housing. It is often used as a reduction gear between the prime mover and the work machine. The function of matching the rotational speed and transmitting torque between the prime mover and the working machine or the actuator is widely used in modern machinery.

Introduction:

The reducer is generally used for transmission equipment with low speed and high torque. The motor, internal combustion engine or other high-speed power is driven by the gears with few teeth on the input shaft of the reducer to mesh the large gear on the output shaft to achieve the purpose of deceleration. The reducer will also have several pairs of identical principle gears to achieve the desired deceleration effect. The ratio of the number of teeth of the large and small gears is the transmission ratio.

Application areas:

The reducer is a mechanical transmission device in many fields of the national economy. The product categories involved in the industry include various types of gear reducers, planetary gear reducers and worm reducers, as well as various special transmission devices, such as speed increase devices and speed control. Devices, and various types of composite transmissions including flexible transmissions. The product service field covers metallurgy, nonferrous metals, coal, building materials, ships, water conservancy, electric power, engineering machinery and petrochemical industries.

The market with great potential has spawned fierce competition in the industry. In the brutal market competition, enterprises in the helical bevel gear reducer industry must speed up the elimination of backward production capacity, vigorously develop high-efficiency energy-saving products, make full use of the national energy-saving products, benefit the project policy opportunities, and increase product renewal efforts. Adjust the product structure and pay attention to the national industrial policy to cope with the complex and volatile economic environment and maintain a good momentum of development.

Oil level check:

1. Turn off the power to prevent electric shock. Waiting for the reducer to cool down;
2. Remove the oil level screw plug to check whether the oil is full;
3. Install the oil level screw plug. Oil inspection:
1. Turn off the power to prevent electric shock. Waiting for the reducer to cool down;
2. Open the oil drain plug and take the oil sample;
3. Check the viscosity index of the oil: If the oil is obviously turbid, it is recommended to replace it as soon as possible;
4. For reducer with oil level screw plug: Check the oil level, if it is qualified; install the oil level screw plug.

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