Reducers Knowledge

We often see the installation of a cooling fan on the high-speed shaft of the geared motor. As we all know, the installation of a cooling fan is to enhance the cooling of the temperature of the geared motor. Thermal power refers to the actual power that does not exceed a certain calculated oil temperature during continuous operation of the gearbox. The heat treatment method of the gearbox is generally carburizing and quenching. When selecting a hard-tooth surface reducer, an important parameter is the thermal power. The thermal power of the reducer is closely related to its heat dissipation. To increase the thermal power, the heating problem in the box should be solved first. When the reducer is running due to excessive heat (heating and heat dissipation process), due to meshing loss, bearing loss, oil stirring loss, and sealing loss, a large amount of heat is generated, which causes the temperature of the reducer to rise due to excessive power loss, which limits the system The normal ...

Cycloidal pinwheel reducer is a common equipment in the factory. Since it is a mechanical device, more or less mechanical problems will naturally occur. Let's introduce some common problems of cycloid pinwheel reducer. 1. Noise The most common fault of the cycloid reducer is noise, which is also the easiest problem to find. Generally speaking, if there is noise, it is likely to be poor gear meshing or corresponding damage. If there is a noise, you need to turn off the equipment immediately and disassemble it to check the condition of the relevant parts. If you leave it alone, it is prone to bigger problems. 2. The host is overheated The host is overheated. If the host is overheated, it is most likely due to overload or too little grease. At this time, we need to let the reducer take a break. If the operation still overheats after the break, it may be that the model does not match, and the model needs to be replaced. In addition, it is necessary to confirm the grease indicator line,...

1. Definition of reduction ratio: The reducer is generally used for low-speed and high-torque transmission equipment. The motor, internal combustion engine or other high-speed running power is used to achieve the purpose of deceleration through the gear with a small number of teeth on the input shaft of the reducer and the large gear on the output shaft. The reducer will also have several pairs of gears with the same principle to achieve the ideal reduction effect. The ratio of the number of teeth of the large and small gears is the reduction ratio, also called the transmission ratio (referred to as ""speed ratio""). 2. Calculation method of reduction ratio 1. Define the calculation method: reduction ratio = input speed ÷ output speed. 2. General calculation method: reduction ratio = operating torque ÷ 9550 ÷ motor power × motor power input revolutions ÷ use coefficient. 3. Gear system calculation method: reduction ratio = number of driven gear teeth ÷ number of dri...

When installing the reducer, it is necessary to install a coupling. The installation of the coupling is very important. If the coupling is not installed properly, it will cause problems such as broken shaft of the reducer, which will bring unnecessary trouble to the user. How to install the coupling of the reducer? What should I pay attention to when installing?  Here is an introduction for everyone: If you purchase a coupling by yourself, please pay special attention to the following dynamic/static balance requirements for the coupling, otherwise the coupling will generate additional radial and axial forces on the reducer shaft and bearings, and accidentally damage the reducer . When the peripheral speed of the outer diameter of the coupling is 30m/s and below, it must be statically balanced; when the peripheral speed of the outer diameter of the coupling exceeds 30m/s, it must be dynamically balanced. If the coupling needs to be pre-heated during installation, it is recommended t...

With the rise of tribology in the 1860s, an organic connection was established between friction, wear, lubrication, and part design. 1. Wear Initial wear stage – Due to manufacturing and installation reasons, the initial wear of the parts is relatively fast, so the first oil change time is short Stable wear stage – The wear rate is slow and constant, usually the length of the mechanical life refers to this period of time Accelerated wear stage – Decrease in mechanical efficiency, change in gap and shape, generate noise and vibration, and must be repaired or replaced 2. Lubrication The lubrication mechanism of gear transmission is to allow lubricant to enter the meshing gear surface, forming a lubricating film to force the meshing tooth surfaces to separate, and turning the dry friction of the meshing tooth surface into internal friction between the internal molecules of the lubricant. Reduce friction Avoid direct contact between metal and metal, turning dry friction into fluid friction...

There are many types of reducers. According to the type of transmission, it can be divided into cycloid reducer, gear reducer, worm reducer and planetary gear reducer. Reducers usually use tapered bearings and deep groove ball bearings. So how to correctly replace the reducer bearing in use? 1. If the reducer is running and the bearing is in an abnormally high position, stop the machine and check whether the bearing is damaged. If it is damaged, it should be replaced immediately, and the transmission will not fail to prevent damage to other parts and reduce productivity. 2. When the reducer is running, the bearing position produces noise. Stop the equipment at this time and check whether the bearings are damaged. If damaged, it should be replaced immediately. In this case, consider whether the noise is caused by the bearing or gear meshing. 3. If there is no oil in the reducer, it is forbidden to run. Using proper lubricating oil, during the operation of the reducer, a very thin protec...

1. The bearing cavity is not cleaned or the grease added is not clean. For example, the tiny rigid material in the bearing cage is not completely cleaned up, and the bearing raceway is damaged during operation, causing excessive temperature rise to burn the bearing. Solution The gearbox cleaning and maintenance machine uses the original lubricating oil of the gearbox to clean the gearbox without adding any cleaning agent, which will not cause secondary pollution to the gear; the filtered oil can also be used again in low-end occasions to achieve Resource reuse. 2.Due to the excessively high operating temperature of the motor body and the lack of oil in the bearing and the lack of grease in the bearing in time, the bearing may even be burned. 3. Improper assembly of the bearing, such as unevenly knocking the inner ring of the bearing during cold assembly to cause the shaft to wear out, causing the inner ring of the bearing and the bearing to lose or reduce the amount of interference, an...

The reason why the reducer produces noise is mainly due to the friction, vibration and collision of the transmission gear. How to effectively reduce and reduce the noise and make the reducer more in line with environmental protection requirements is also a key research topic at home and abroad. Reducing the gear transmission noise during the operation of the reducer has become an important research topic in the industry. Many scholars at home and abroad regard the change of gear tooth meshing stiffness in gear transmission as the main factor of gear dynamic load, vibration and noise. Use the method of shape modification to minimize the dynamic load and speed fluctuation to achieve the purpose of reducing noise. This method has proved to be a more effective method in practice. However, with this method, the process requires shaping equipment, which is often impossible for the majority of small and medium-sized factories. After years of research, some scholars have proposed that by optim...

Reason analysis:   There are many ways of oil leakage in the reducer, but the most common one is the oil leakage at the seals of the driving and driven shaft heads, especially the oil leakage at the sealing ring of the driving shaft. In addition to the above cases, there are the following 3 oil leakage locations.   a. Oil leakage along the box surface of the reducer; b. Oil leakage along the sight hole cover above the reducer; c. Oil leakage along the oil drain hole at the bottom of the reducer;   Oil leakage at the sight hole cover and the oil drain hole is mainly caused by the fixing bolts are not fully tightened or the sealing gasket is not installed. When assembling the box for individual reducers, there are iron filings on the box surface, which makes the box surface not tight and leaks oil. In addition to the above-mentioned factors, the reason for oil leakage on the sealing surface is that the housing of the reducer is deformed after a period of use, causing the se...

When the reducer is in normal operation, due to the loss of efficiency, part of the input power will be converted into heat energy, making the internal temperature of the reducer rise, if the temperature is too high, it will cause damage to the internal parts. Therefore, the pre-selection and checking of reducer should meet the requirements of thermal power. Cause of reducer fever: 1. Possible causes: reducer overload operation, bearing wear, improper assembly of bearings, gears, shafts and other parts, too high or too low voltage, too much start and stop in a short time, poor lubrication, etc. 2. In steel rolling production, excessive load operation may cause frequent failures of multiple reducer, and bearing wear is common. 3.Abnormal heating of the reducer refers to the serious heating of the bearing part or shell part of the reducer, which is beyond the normal temperature range. The most common is the heating of the bearing part. Solutions: 1. Water-cooled coil is installed at the ...

The reducer manufacturer’s friendly reminder:  The operating environment of the reducer needs to be clean and tidy. Due to the poor operating environment of some customers, the reducer often suffers from wear and leakage.  To summarize, the main faults include the following: Fault 1: The shaft diameter of the gear shaft of the reducer is worn, and the main wear parts are on the shaft head, keyway, etc.; Fault 2: wear of the bearing chamber of the reducer, including the wear of the housing bearing box, the bearing chamber of the box bore, and the bearing chamber of the gearbox; Fault 3: Leakage on the joint surface of the reducer; Fault 4: The bearing of the reducer drive shaft is worn out. The processing methods given for the above faults: For the wear problem, the traditional solution is repair welding or machining and repair after brush plating, but both have certain drawbacks: the thermal stress generated by the high temperature of repair welding cannot be completely elimin...

Oil seal leakage, abnormal noise, abnormal vibration, high temperature, auxiliary transmission failure...Is it due to unstable installation, improper operation, or failure of the reducer itself...How to troubleshoot? Let's listen to the advice of Flender after-sales technical experts. Oil seal leaking Troubleshooting points: 1) Check the operating oil temperature of the reducer. Too high oil temperature will cause the oil seal to age too quickly. The maximum allowable use temperature of mineral oil is 90 degrees, and the limit temperature of synthetic oil is 100 degrees. 2) Check the lubrication method of the reducer and the type of lubricating oil. Generally, lubricating oil is divided into PG, PAO, and MIN. Among them, PG has a greater impact on the life of the oil seal. 3) Check the alignment accuracy of the reducer coupling. The installation of the reducer has strict alignment requirements. The adjustment accuracy is an important factor that determines the service life of the s...

1. Wear and tear of the reducer bearing chamber It also includes the wear of the housing bearing box, the inner bore bearing chamber of the box, and the gearbox bearing chamber. This situation is mainly caused by the improper adjustment of the parallelism and coaxiality of the shafts when installing the shafts and bearings; in the process of long-term operation Deflection force (radial or axial) or abnormal vibration of the box body appears in the process, causing the shaft and bearing to be stressed to a certain degree of wear on the bearing chamber. 2. The shaft diameter of the gear shaft of the reducer is worn The main wear parts are the shaft head, keyway, etc. The reason for this kind of failure is the frequent overload start and the material problem of some parts during operation. 3. The bearing position of the drive shaft of the reducer is worn or the bearing is faulty Incorrect assembly will not only accelerate the wear of the bearing, but also breakage and high-temperature sei...

The correct use method can make the equipment exert their powerful skills, let's understand what are the use skills of the reducer. 1. After 200 to 300 hours of operation, the oil should be changed for the first time, and the quality of the oil should be checked regularly in the future use, and the oil mixed with impurities or deteriorated should be replaced in time. Under normal circumstances, for a long-term continuous working reducer, the new oil should be replaced with new oil after 5000 hours of operation or once a year. For a reducer that has been out of service for a long time, the new oil should also be replaced before re-operation. The reducer should be added with the same oil as the original brand, and should not be mixed with oils of different brands. Oils with the same brand but different viscosities are allowed to be mixed; 2. When changing the oil, wait until the reducer has cooled down and there is no danger of burning, but it should still be kept warm, because after...

1. Installation and adjustment   a. In order to ensure the assembly accuracy of the reducer, it is not necessary to start the machine during installation and do not damage the sealing and filling. You can check by opening the oil cover or use kerosene (diesel) to wash the surface of the gear with anti-rust grease.   b. Flexible couplings can also be used between the reducer and the motor or the main engine and other couplings. Gear couplings or other non-rigid couplings can also be used.   c. The reducer should be installed steadily and firmly, and the base adjustment gasket must be tight (steel gasket is used). The deviation of the coaxiality with the coupling shall not be greater than the allowable value of the coupling used.   d. Check whether the bolts on each contact surface of the box body are loose, and re-tighten them if they are loose.   2. Use and maintenance   a. The load test must be carried out before the reducer is officially used.   b. B...

1. The bearing is broken:   1.1 Reason analysis: The bearing fracture of the reducer mainly occurs in the driving shaft bearing. The main reason is that when the driving shaft moves, axial sliding will occur between the inner ring of the bearing and the rollers, causing the inner ring of the bearing to move axially, causing the inner bearing rollers to move first. damage;   1.2 Prevention and elimination methods:   Increase the interference between the inner ring and the shaft, or add a retaining ring on the outer side of the inner ring of the bearing to prevent axial movement; 2. The reducer has abnormal noise   2.1 Reason analysis:   a. Reducer overload operation; b. The load of the working machine is unbalanced; c. Lubricating oil deterioration; d. The gear tooth surface is worn or the manufacturing quality is poor; e. The bearing clearance is too large or too small; f. There are adhesions on the tooth surface; g. There are sundries in the box.   2.2 Pre...

The reducer is a power transmission mechanism that uses a gear speed converter to decelerate the number of revolutions of the motor to the required number of revolutions and obtain a larger torque. In the current mechanism used to transmit power and motion, the application range of the reducer is quite wide. It can be seen in almost all kinds of mechanical transmission systems, from ships, automobiles, locomotives, heavy machinery used in construction, processing machinery and automated production equipment used in the machinery industry, to the common ones in daily life Home appliances, clocks and so on. Its applications range from large power transmission work to small load and precise angle transmission. The reducer can be seen in the application, and in industrial applications, the reducer has the function of reducing speed and increasing torque. Therefore, it is widely used in speed and torque conversion equipment. Precautions for installation of reducer: 1. Before assembling the ...

First, above all, confirm before installation whether the motor and the planetary reducer are intact, and strictly check whether the dimensions of the parts connected to the motor and the planetary reducer match. Here is the installation flange of the motor, the positioning convex platform, the output shaft and the reducer groove and the coordination tolerances.  Step 2: Connect the motor to the planetary reducer naturally. When connection, the reducer output shaft and the motor input shaft are concentric, and the lateral flange is parallel. As with inconsistent consistency, motor shaft fracture or reducer gear wear. During installation, it is not prohibited to strike with hammers to prevent excessive axial or radial damage to the bearing or gear. Be sure to tighten the mounting bolts before twisting the tight force bolts. Before installation, the rust-proof oil of the motor input shaft, positioning convex platform and reducer connection site shall be wiped clean with gasoline or z...

The main steps of the reducer installation are as follows: First step: Before installation, confirm whether the motor and reducer are intact, and strictly check whether the dimensions of the parts connecting the motor and the reducer match, including the size and matching tolerances of the positioning boss of the motor, the input shaft and the groove of the reducer. Second step: Unscrew the screw on the dust-proof hole on the outer side of the reducer flange, adjust the PCS system clamping ring to align the side hole with the dust-proof hole, and insert the inner hexagon to tighten. After that, remove the motor shaft key. Third step: Connect the motor and the reducer naturally. When connecting, it must be ensured that the concentricity of the output shaft of the reducer and the input shaft of the motor is the same, and the outer flanges of the two are parallel. If the center is inconsistent, it will cause the motor shaft to break or the gear of the reducer to wear. In addition, during ...

The reducer plays an important role in industrial production. The normal operation of the equipment is inseparable from the credit of its internal parts. Let's understand the molding method of the main parts in the gear reducer equipment. 1. Box body and lid The box body and the box cover are the support and containment parts of the transmission parts in the reducer. Relatively speaking, the structure is more complicated. In use, it requires good rigidity, shock absorption and sealing performance. If it is a small batch production, it can be molded by hand. When mass production, it needs to use its gray cast iron and use the machine molding method to cast it. 2. Shafts, gear shafts and gears Shafts, gear shafts and gears are all important transmission parts in the reducer. The shafts of shafts and gear shafts are subjected to the combined effect of bending and torsion, which requires good comprehensive mechanical properties; gear shafts and gear teeth Part of it is subject to great...