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Fault Treatment Of Gear Reduction Box
Aug 31, 2018

Due to the poor running environment of the reducer, there are often faults such as wear and leakage:

   1. Wear of bearing chamber of gear reduction box, including wear of shell bearing box, bore bearing chamber of box body and bearing chamber of gearbox.

When the reducer fails, 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 condensed by the moisture produced after the heat becomes cold during the operation and shutdown of the reducer; of course, it is also related to the bearing quality and the assembly process. Law is closely related.

    2. Reducer gear shaft diameter wear, the main wear parts in the shaft head, key way and so on;

    3. Wear of reducer drive shaft bearing position.

    4. Leakage of reducer surface.

    5. Heating and oil leakage

In order to improve the efficiency of worm gear reducer, non-ferrous metal is generally used as worm gear, and harder steel is used as worm gear. Because it is sliding friction drive, higher heat will be produced during operation, so that the thermal expansion between the parts and seals of the reducer will be different, resulting in clearance in each mating surface, and oil Thinning due to rising temperature is easy to cause leakage. There are four main reasons. One is whether the material matching is reasonable, the other is the surface quality of meshing friction surface, the third is the choice of lubricating oil, whether the addition is correct, the fourth is the assembly quality and the use environment.

    6. Worm gear wear

The worm gear is generally made of tin bronze. The matching worm material is usually hardened with 45 steel to HRC45-55. The hardened HRC50-55 is also commonly used 40C: hardened. The roughness RaO.8 FCM is grinded by worm grinder. When the reducer is in normal operation, the worm is like a hardened "file", which is constantly filed to make the worm gear wear. Generally speaking, this kind of wear is very slow, like some reducer in a certain factory can be used for more than 10 years. If the wear rate is fast, it is necessary to consider the correct selection of the reducer, whether there is overload operation, worm gear and worm material, assembly quality or the use of the environment and other reasons.

    7. Helical gear wear

Generally occurs in vertical installation of the gear reduction box, mainly with the amount of lubricant added and the choice of lubricant. Vertical installation, it is easy to cause insufficient lubricating oil, when the reducer stops running, the motor and reducer transmission gear oil loss, gear can not get the proper lubrication protection, start or operation process can not be effective lubrication resulting in mechanical wear and even damage.

  In view of the wear problem, the traditional solution is repair welding or brush plating, but both have certain drawbacks: repair welding high temperature thermal stress can not be completely eliminated, easy to cause material damage, resulting in bending or fracture parts; and brush plating by coating thickness limitation, easy to peel off, and the above two methods are both The metal is repaired with metal, can not change the "hard-to-hard" relationship, under the combined action of various forces, will still cause re-wear. For some large bearing enterprises, it is impossible to solve them at the scene. Contemporary western countries often use polymer composites to repair the above problems, which have super adhesive force, excellent compressive strength and other comprehensive properties. Repairing with high polymer material can avoid dismantling and machining without the influence of welding thermal stress, and the thickness of repairing is not limited. At the same time, the metal material possessed by the product does not have the concession, can absorb the shock vibration of the equipment, avoid the possibility of wearing again, and greatly prolong the service life of equipment components, saving for enterprises. A lot of downtime will create enormous economic value.

   In view of the leakage problem, the traditional method needs to remove and open the reducer, replace the seal gasket or apply sealant, not only time-consuming and laborious, but also difficult to ensure the sealing effect, in operation there will be leakage again. Macromolecule material can be used to control leakage on site. It has excellent adhesion, oil resistance and 350% tensile strength. It can overcome the influence of vibration of reducer and solve the leakage problem of reducer for enterprises.

    *For more detailed parameters,size,price.Pls contact the Hangzhou Starred-River Machinery Co., Ltd.




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