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Why should planetary reducers be equipped with servo motors?
First of all, the servo motor does not necessarily have to be equipped with a planetary reducer. In addition to the characteristics of being able to withstand large loads, planetary reducers can also make the transmission accuracy particularly high, and the backlash accuracy of the output end can reach less than 1 point. Usually when the positioning accuracy requirements are not so high, it can be equipped with other reducers, helical gear reducers, bevel gear reducers K series, R series, F series, with low backlash option / R, transmission accuracy is also particularly high, general transmission accuracy requirements are no problem.
Common problems and reasons of reducer
Reducer is a kind of transmission machinery with compact structure, large transmission ratio, and self-locking function under certain conditions, and it is easy to install, reasonable structure, and is more and more widely used. Common problems and their causes. 1) The reducer is heated and leaks, (2) the worm gear is worn, (3) the transmission small helical gear is worn, and (4) the bearing (at the worm) is damaged. 1. The reducer is hot and leaks. Reducer in order to improve efficiency, generally use non-ferrous metal as worm gear, worm is made of harder steel, because it is sliding friction transmission, in the process of operation, will produce higher heat, so that the reducer parts and seal thermal expansion difference, thereby producing gaps in each mating surface, and oil due to the increase of temperature thinner, easy to cause leakage. There are four main reasons, one is whether the material matching is reasonable, the second is the surface quality of the meshing friction surface, the third is the choice of lubricating oil, whether the amount of addition is correct, and the fourth is the assembly quality and use environment. 2. Worm gear wear. The worm gear is generally made of tin bronze, and the paired worm material is generally hardened to HRC45-55 with 45 steel, and 40C: hardened HRC50-55, ground to roughness RaO by worm grinder. 8 fcm, when the reducer is operating normally, the worm is like a hardened "file", constantly filing the worm gear, so that the worm gear wears. Generally speaking, this wear is very slow, like some reducers in a certain factory can be used for more than 10 years. If the wear speed is fast, it is necessary to consider whether the selection of the reducer is correct, whether there is overload operation, the material of the worm gear, the assembly quality or the use environment.
The problem of broken shaft caused by the output of the reducer is too small
In addition to the broken shaft of the reducer caused by the poor concentricity of the assembly of the output end of the reducer, if the output shaft of the reducer is broken, it is nothing more than the following reasons. First of all, the wrong selection leads to insufficient output of the equipped reducer. Some users mistakenly think that as long as the rated output torque of the selected reducer meets the working requirements, in fact, it is not, first, the rated output torque of the equipped motor is multiplied by the reduction ratio, and the value obtained is in principle less than the rated output torque of the similar reducer provided by the product sample, and the second is to consider the overload capacity of the drive motor and the actual required working torque. Theoretically, the operating torque required by the user. It must be less than 2 times the rated output torque of the reducer. Especially in some applications, this criterion must be strictly observed, which not only protects the reducer, but also avoids the output shaft of the reducer being twisted off. This is mainly because, if there is a problem with the equipment installation, the output shaft of the reducer and its load are stuck, and the overload capacity of the drive motor will still make it continue to increase the output, and in turn, the output bearing of the reducer may be subjected to more than 2 times its rated output torque and the output shaft of the reducer may be torsqueed. Secondly, in the process of acceleration and deceleration, if the instantaneous torque of the output shaft of the reducer exceeds 2 times of its rated output torque, and this acceleration and deceleration are too frequent, it will also make the reducer break the shaft. Considering that this situation is rare, it will not be described further here.
How to deal with the surface damage of the reducer
The surface of the reducer is easily damaged, if there is surface damage, how should we deal with it, the following for the reducer surface damage should be dealt with a brief understanding: 1. Once the bearing is severely worn, overloaded or impacted and the reducer bearing is slightly deformed or bent, it will cause the rotor to sweep. As a result of sweeping, the surface of the iron core is scratched, and the heavy core is worn and the winding is burned by touching the shell, and the power supply should be cut off immediately, so that the gearmotor stops working and inspects. 2. The silicon steel sheet at the core abrasion part is annealed due to friction overheating, resulting in a decrease in the magnetic permeability of the silicon steel sheet, if not treated in time, with the aging of the core insulation of the planetary gear reducer, the eddy current continues to increase, resulting in an increase in the temperature rise of the planetary gear reducer, and the micro motor overheats or even burns out. 3. The winding insulation breakdown short circuit or the winding short circuit to the ground produces an arc, so that the surface of the core is burned, and the surface of the burned core is often uneven. This not only affects the normal operation of the reducer, but also leads to a short circuit between silicon steel sheets, which increases the core vortex. After understanding how to deal with the surface damage of the reducer, I hope that it will be more helpful to us in the future, and at the same time will bring greater benefits, which is also more conducive to our use.
Performance characteristics and use skills of reducer
Reducers are widely used in metallurgy, mining, lifting, transportation, cement, construction, chemical industry, textile, printing and dyeing hard tooth surface reducer, pharmaceutical and other fields. Hard tooth surface reducer is a power transmission mechanism that uses the speed converter of the gear to decelerate the number of rotations of the motor to the required number of rotations and obtain a larger torque. Four major skills for the use of the reducer: First, during the work, when the oil temperature rises more than 80 °C or the oil pool temperature exceeds 100 °C and produces abnormal noise, it should be stopped, check the cause, eliminate the fault, and replace the lubricating oil before continuing to operate Second, when changing the oil, wait for the reducer to cool down without the risk of combustion, but it should still be kept warm, because after complete cooling, the viscosity of the oil increases and it is difficult to drain oil. Note: Cut off the power to the transmission to prevent unintentional power. Third, after 200~300 hours of operation, the yi oil change should be carried out, and the quality of the oil should be checked regularly in the future use, and the oil mixed with impurities or deterioration must be replaced in time. Under normal circumstances, for the reducer that works continuously for a long time, replace the new oil according to 5000 hours of operation or once a year, and the reducer that has been out of service for a long time should also be replaced with new oil before re-operation. The reducer should be added with the same oil as the original brand, and should not be mixed with different brands of oil, and oils of the same brand but different viscosity are allowed to be mixed. 4. The user should have reasonable use and maintenance rules and regulations, and the operation of the reducer and the problems found in the inspection should be carefully recorded, and the above provisions should be strictly implemented.