Article List
- The main characteristics of planetary gear reducer transmission1. 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
- Reasons for the gear of the reducer to be stuckDuring 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.
- Vibration measurement of gear reducerChoice 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
- Method to relieve internal pressure of planetary reducerWhen 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
- Analysis of the easy-to-produce faults of worm gear reducerAs a traditional transmission system, the internal structure is a worm gear, and the tooth profile is involute.Many consumers of worm gear reducers have very limited understanding of worm gear reducers, not to mention the research on some existing problems. Next, the editor will work with you to understand the analysis of the existing problems of worm gear reducers.1. The reducer is hot and leaks oil.In order to better improve work efficiency, worm gear reducers usually use non-ferrous metals as the worm wheel, and the worm runs on harder materials.Because it is a sliding friction transmission, more heat will be generated during operation, which will cause differences in thermal expansion and contraction between the parts and seals of the reducer, and then gaps will be generated on each mating surface, and the lubricating oil will become thinner due to the increase in temperature. prone to leakage.There are four key factors that produce this situation, one is the unscientific matching of materials; the other is the poor quality of the meshing friction surface; the third is the incorrect choice of lubricating oil addition;
- Whether the reducer manufacturer is reliable or not, you will know by asking these five points clearlyAfter years of testing, we have summarized some performance indicators to evaluate the quality of the reducer, especially the places that are prone to problems during the research and development process of the reducer.No one can escape these pits.Whether it can be solved and when it will be solved depends on the strength of research and development.Therefore, the next time a reducer manufacturer comes to your door, you can ask them if they have encountered these problems, and you will know whether this company is reliable or not.No matter what the reducer is, oil leakage is a problem that must be faced.The cause of oil leakage is more complicated, involving the brand of oil seal, oil seal assembly, shaft processing technology, use method, etc., and oil leakage can be divided into real oil leakage and fake oil leakage.The so-called false oil leakage refers to the oil leakage that occurs shortly after operation, the amount of oil leakage is not much, and it will not appear again after a short period of time.This is generally an internal pressure release, and once the pressure is released, everything will be fine.But the timing of the real oil spill is uncertain, it may be
- Why is the planetary reducer the most precise reducer?Acceptance criteria for gearboxes: Appearance inspection; no-load, temperature rise test; bearing clearance test; box vibration measurement test; shaft vibration displacement measurement test; installation and adjustment requirements; gearbox daily inspection and maintenance.1 Appearance inspection 1. Check by visual inspection. The appearance should be glossy, the paint should be evenly closed, whether the end cover, upper and lower covers and other studs are complete; whether there is a nameplate, and whether the content of the nameplate is clear and correct; 2. No gaskets are allowed to be filled, but sealant or water glass can be applied to ensure the sealing; 3. During assembly, before tightening the bolts of the box body, a 0.05mm feeler gauge should be used to check the sealing between the joint surface of the box cover and the box seat 4. The seal of the shaft extension should be coated with grease.The sealing devices of the reducer should be installed in strict accordance with the requirements.2 No-load and temperature rise test Add enough clean lubricating oil according to the specified oil quantity, and carry out forward and reverse no-load test runs at the rated speed.Trial run time
- How to choose a cost-effective hard tooth surface reducerReducer With the rapid development of China's manufacturing industry, especially in the field of automation technology, the demand for reducers is increasing.But for the industry, ordinary reducers can no longer be achieved, and the emergence of hard tooth surface or helical gear reducers just fills this gap, so how to choose a cost-effective
- How to install a shaft-mounted reducerHow to install a shaft-mounted geared motor.Here we mainly explain the installation relationship between the shaft-mounted geared motor and the working machine, the connection between the shaft-mounted geared motor and the working machine, and the installation of the counter-torque bracket.The following is a Shanghai reducer to describe in detail how to install it.1. The installation relationship between the shaft-mounted deceleration motor and the working machine In order to avoid the bending of the main shaft of the working machine and the additional force on the bearing of the reducer, the distance between the reducer and the working machine should be as far as possible without affecting the normal work. Small, its value is 5-10mm.2. The connection between the shaft-mounted deceleration motor and the working machine. The reducer is directly set on the main shaft of the working machine. When the reducer is running, the reaction torque acting on the reducer box is installed on the reducer box. Other ways to balance.The machine is directly matched, and the other end is connected with the fixed bracket.3. The installation of the anti-torque bracket The anti-torque bracket should be installed on the side of the working machine facing the reducer, so as to
- Why does the planetary reducer have a broken shaft?Why does the planetary reducer have a broken shaft?The first possible problem with a large broken shaft is the quality of the planetary reducer.Of course, this is what we ordinary people can think of, and the main reason is the reason that occurs during the usual use.For example, what should we pay attention to during the acceleration and deceleration process of using the planetary reducer, and what is the best way.1. Some applications must strictly abide by this criterion. This is not only to protect the reducer, but more importantly, to prevent the output shaft of the planetary reducer from being twisted.This is mainly because, if there is a problem with the installation of the equipment, the output shaft of the reducer and its load are stuck, and the overload capacity of the driving motor will still increase its output, which may cause the output bearing of the reducer to be damaged. The output shaft of the reducer is twisted off if the force exceeds 2 times its rated output torque.2. In the process of acceleration and deceleration, if the instantaneous torque multiplied by the output shaft of the planetary reducer