Worm gear wpdx70 reducer is a transmission machinery with compact structure, large transmission ratio and self-locking function under certain conditions. It is one of the commonly used reducers. Among them, hollow shaft worm gear wpdx70 reducer not only has the above characteristics, but also has convenient installation and reasonable structure, and is more and more widely used. The hollow shaft worm gear wpdx70 reducer is equipped with a helical gear reducer at the input end of the worm gear reducer. The multi-stage reducer can obtain very low output speed. It is a combination of helical gear stage and worm gear stage, and has higher efficiency than the pure single-stage worm gear wpdx70 reducer. Moreover, it has the advantages of low vibration, low noise and low energy consumption.
Common problems and their causes. 1) The reducer is heated and leaking oil, (2) the worm gear is worn, (3) the transmission pinion is worn, (4) the bearing (worm) is damaged.
1. Heat and oil leakage of reducer. In order to improve the efficiency of worm gear and worm wpdx70 reducer, non-ferrous metal is generally used as worm gear, and the worm is made of hard steel. Because it is sliding friction transmission, it will generate high heat during operation, resulting in differences in thermal expansion between various parts and seals of the reducer, resulting in gaps on various mating surfaces, and the oil becomes thinner due to the increase of temperature, Easy to cause leakage. There are four main reasons: first, whether the material matching is reasonable; second, the surface quality of the meshing and friction surface; third, whether the selection and addition amount of lubricating oil are correct; fourth, the assembly quality and use environment.
2. Worm gear is worn. The worm gear is generally made of tin bronze. The matched worm material is generally hardened to hrc45-55 with 45 steel. It is also commonly hardened to hrc50-55 with 40C and ground to roughness Rao by worm grinder 8fcm, during normal operation of the reducer, the worm is like a hardened file, constantly filing the worm gear, causing wear to the worm gear. Generally speaking, this kind of wear is very slow. Like some reducers in a factory, they can be used for more than 10 years. If the wear speed is fast, it is necessary to consider whether the selection of reducer is correct, whether there is overload operation, the material of worm gear, assembly quality or service environment.
3. The transmission pinion is worn. It usually occurs on the reducer installed vertically, which is mainly related to the addition amount of lubricating oil and the selection of lubricating oil. During vertical installation, it is easy to cause insufficient lubricating oil. When the reducer stops running, the transmission gear oil between the motor and the reducer loses, the gear does not get due lubrication protection, and the effective lubrication is not obtained during startup or operation, resulting in mechanical wear and even damage.
4. The worm bearing is damaged. When the reducer breaks down, even if the gearbox is well sealed, the factory often finds that the gear oil in the reducer has been emulsified and the bearing has been rusted, corroded and damaged. This is because the gear oil is caused by the condensation of water generated after heating and cooling during the operation and shutdown of the reducer; Of course, it is also closely related to bearing quality and assembly process.
resolvent:
(1) Ensure assembly quality. In order to ensure the assembly quality, the factory purchased and made some special tools. When disassembling and installing the worm gear, worm, bearing, gear and other parts of the reducer, try to avoid direct knocking with hammer and other tools; When replacing gears, worm gears and worms, try to select original accessories and replace them in pairs; When assembling the output shaft, pay attention to the tolerance fit, d50mm, H7 / K6, d50mm, H7 / M6. At the same time, anti sticking agent or red lead oil shall be used to protect the hollow shaft from wear and rust and scale on the mating area, which is difficult to disassemble during maintenance.
(2) Selection of lubricating oil and additives. The worm gear wpdx70 reducer generally adopts 220# gear oil. For some reducers with heavy load, frequent startup and poor service environment, the factory also selects some lubricating oil additives (such as those of Anzhi chemical company). When the reducer stops running, the gear oil is still attached to the gear surface to form a protective film to prevent heavy load and low speed, Metal to metal contact during high torque and start-up. The additive also contains sealing ring regulator and anti leakage agent to keep the sealing ring soft and elastic and effectively reduce lubricating oil leakage.
(3) Selection of installation position of reducer. If the location permits, vertical installation shall not be adopted as far as possible. In vertical installation, the amount of lubricating oil added is much more than that in horizontal installation, which is easy to cause heating and oil leakage of the reducer. Some of the 40000 bottles / hour pure draft beer production lines introduced by the factory are installed vertically. After a period of operation, the transmission pinion has been greatly worn or even damaged. After adjustment, the situation has been greatly improved.
(4) Establish corresponding lubrication maintenance system. According to the five principles of lubrication work, the factory maintains the reducer so that each reducer is regularly inspected by your personnel. When the oil temperature rises significantly, the temperature rise exceeds 40 ℃ or the oil temperature exceeds 80 ℃, the quality of the oil decreases, or more copper powder is found in the oil and abnormal noise is generated, it shall stop using immediately and repair in time to eliminate the fault, Replace the lubricating oil before use. When refueling, pay attention to the consistency of oil quantity and installation position to ensure that the reducer is properly lubricated.
In short, the hollow shaft worm wpdx70 reducer has the advantages of convenient installation, reasonable structure, reliability and durability. Of course, we should also pay attention to the brand of wpdx70 reducer. Powerful companies will produce high-quality, reliable and durable reducer according to the design key points of reducer, such as the shape of reducer, the arrangement of heat dissipation ribs, the calculation of heat balance, the design of oil circuit and so on, combined with the actual use and operation conditions of reducer. Users can get satisfactory results as long as they use and maintain them correctly.