When the concentricity of the assembly between the drive motor and the reducer is maintained well, the output shaft of the drive motor bears only the rotational force (torque), and the operation will remain smooth without pulsation.When the two are not concentric, the output shaft of the drive motor needs to bear the radial force (bending moment) from the input end of the reducer.The action of this radial force will force the output shaft of the drive motor to bend, and the direction of bending will change continuously with the rotation of the output shaft.If the concentricity error is large, the radial force will also increase the local temperature of the motor output shaft, which will cause the metal structure of the machine parts to be continuously damaged, and eventually cause the output shaft of the drive motor to fail due to local excessive fatigue. break off.The greater the concentricity error between the two, the shorter the time required for the output shaft of the drive motor to break.While the output shaft of the drive motor may be broken, the input end of the reducer will also bear the force from the output shaft of the drive motor. Read More

1. Cause analysis a. Insufficient lubricating oil.When the oil level of the lubricating oil is insufficient or cannot reach a reasonable height due to the oil leakage of the reducer, it may cause the bearing temperature of the reducer to be high or there may be noise; b. The friction of the bearing cover or the sealing part is too large.When the bearing cover or the sealing part and the connecting part are worn due to improper bearing installation, improper bearing cover or long-term use, the temperature of the reducer bearing will be high or there will be noise; c. Bearing damage or wear.It mainly includes the damage of the bearing cage, the wear or deformation of the inner and outer rings, and the wear or drop of the balls, which will make the reducer unable to work normally; d. The bearing clearance is too large or too small.When long-term use causes the gap between the ball of the reducer bearing and the inner and outer rings or the gap between the bearing inner ring and the shaft, and the gap between the bearing and the end cover to become larger, symptoms of bearing overheating noise may appear; e. The helical gear key handle is loose.The looseness of the key handle of the helical gear will cause the mismatch between the gear and the shaft. Read More

1. Smooth movement, strong shock and vibration resistance: due to the adoption of several planetary gears with the same structure, which are evenly distributed around the center wheel, the forces of the planetary gear and the rotating arm are balanced.The coaxial feature also increases the number of meshing teeth, making the planetary gear drive stable, strong in shock and vibration resistance, and reliable in work.2. The transmission ratio is large, which can realize the synthesis and decomposition of motion: as long as the appropriate type and gear matching scheme are selected, a few gears can be used to obtain a large transmission ratio, up to several thousand.While the transmission ratio is large, it can still maintain the characteristics of compact structure, small mass and small volume.In particular, it should be pointed out that it can also realize the synthesis and decomposition of motion and various complex speed-changing motions.3. The planetary gear reducer is small in size, small in mass, compact and reasonable in structure, and has a carrying capacity: due to the power split of the planetary gear transmission and the coaxial transmission formed by each center wheel, it can be reasonably applied Read More

During the use of the gear reducer, there will occasionally be a phenomenon of stuck teeth. Once this happens, first of all, don’t be impatient. Most of the time it is negligent in the process of using the gear reducer, and the bearings are not lubricated and maintained, which leads to this phenomenon. The next step is to confirm whether this is the case. If it is indeed such a problem, you can directly remove the gear reducer from the machine, clean the bearing and add lubricating oil to avoid similar stuck teeth.Teeth jamming is not only a reason for bearing lubrication, there are usually the following reasons. First, the surface hardness of the gear itself is not enough, and the surface of the gear is damaged and seized after being stressed; There is a problem with the bearing; the third is that there is a problem with the proper lubrication system; and the torque transmitted by the gear exceeds the design capacity.There are many possible reasons.Fourth, the gears and bearings of the reducer are broken, which manifests as noise, excessive clearance, and high temperature. Read More

Choice of vibration measurement method There are two measurement methods for the vibration of the gear unit, one is to measure the vibration of the box and the other is to measure the vibration of the shaft.Combining these two measurement methods to obtain the absolute movement of the shaft in the gear unit is also a more effective method.For gear units supported by rolling bearings, the bearing radial clearance is small, and the relative movement between the bearing and the box is also small, so the box vibration measurement should be used.For gear units supported by ordinary sliding bearings, shaft vibration measurement or box vibration measurement can be used.However, when the frequency is in the range of 0-500Hz, the vibration measurement of the box is insensitive and difficult to measure the tiny vibration, so the shaft vibration measurement should be used.The vibration measurement of the box can obtain a wide frequency range and dynamic characteristics, which can provide the necessary basis for the analysis of the meshing frequency of the gear teeth.(2) Vibration measurement of the shaft The vibration displacement of the shaft should be measured relative to the box.Should use non-contact Read More

When the planetary reducer is running at high speed, the temperature and pressure changes in the inner cavity directly affect its load rate, continuous rotation speed and service life.In order to ensure that the input end and output shaft of the planetary reducer are sealed bearings and sealing rings, but the sealed bearings and sealing rings will also affect the temperature and pressure changes in the internal cavity of the reducer.Therefore, under the premise of considering the cost, it is necessary to consider that moderate is to reduce temperature and blood pressure.The temperature and pressure limit the maximum rotation efficiency of the planetary reducer to 98%, and 2% of the input energy is turned into heat and lost.This kind of damage mainly comes from the friction of the sealing ring and the bearing, which will increase the temperature of the inner cavity of the planetary reducer.Sometimes the relatively high natural ambient temperature outside will also increase the temperature of the internal cavity of the reducer.The temperature of the inner cavity of the reducer immediately limits the output torque and output speed ratio.There are many ways to reduce the pressure in the inner cavity of the planetary reducer: one is Read More