Chengming Machinery Co., Ltd.


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Improve damage caused by fatigue of gear reducer

Edit: ChengMingRelease time: 2019-Feb-23

       The cause of fatigue damage of the toothed gear reducer (Retarder) is due to the quality problems (Emerson) appearing in the manufacturing process of the reducer (Emerson); the second is the wrong selection of process equipment (shèbèi), thermal power ( Refers to the amount of work done by the object in a unit of time) that does not meet the requirements of the production process, resulting in a large amount of load during the actual operation, and the hidden defects are gradually exposed, resulting in a final The gear is subjected to contact fatigue damage, the rack is peeled off and fractured, and the equipment is scrapped.

       Hardened gear reducer uses all kinds of gear transmission to achieve the purpose of speed reduction. The reducer is composed of gear pairs of various stages. For example, the gear can be driven by a small gear to achieve a certain speed reduction, and then multi-stage The structure can greatly reduce the speed.

        Therefore, the selection of hardened gear reducers must be cautious. Improve the fatigue of the hardened gear reducer (Retarder) (pointer to solution)

  (1) In consultation with the manufacturer, the material of the gear shaft was changed from 20CrMnTi to 20CrMnMo to improve its comprehensive mechanical properties and increase the life. Gear reducer is a slewing mechanism widely used in China's East China and East China for tower-introduction crane machinery. It is widely used in metallurgy, mining, lifting, transportation, cement, construction, chemical, textile, printing and dyeing, pharmaceutical and other fields. .


       (2)Adjust the amount of reduction, reduce the load (load) to prevent low-temperature rolling, so as to ensure that the reduction power (Retarder) thermal power (refers to the amount of work done by the object in a unit of time) Drop (descend).


       (3)Improve the environmental conditions of the reducer, take forced air, and reduce the oil temperature of the reducer.

      (4)Carefully maintain the operation control, strengthen the inspection, ensure the lubrication and cooling oil quantity, and replace the medium (the material that plays a decisive role) in time to ensure the oil quality performance.


      (5)It is planned to increase the fuel circulation facility; the deep well pump replaces the small-capacity oil pool with the flowing oil to further reduce the cooling and fuel injection. It also improves lubrication and improves contact. Planetary gear reducers are also known as planetary reducers and servo reducers. In the family of reducers, planetary reducers are widely used in servo systems, stepping motors, DC motors and other transmission systems due to their small size, high transmission efficiency, wide deceleration range and high precision. Its role is to reduce the speed increase torque and reduce the load/motor moment of inertia ratio under the premise of ensuring precision transmission.