What to do with the wear-resistant drive gear effect of excavators?

by:Join Machinery     2021-04-22
What to do with the wear-resistant driving tooth effect of excavators? We analyze the failure of the wear-resistant driving teeth of excavators as follows:    The force analysis of the excavator, the working surface of the wear-resistant driving tooth is in contact with the excavated material, and our excavating machinery is in a complete excavation The force is different at different working stages in the process. When the tooth tip of the excavating machine first contacts the surface of the material, due to the faster speed, the wear-resistant drive tooth tip is subject to a stronger impact. If the yield strength of the wear-resistant drive tooth is low , It will produce plastic deformation at the tip. As the digging depth increases, the force of the wear-resistant drive tooth will change. When the wear-resistant drive tooth cuts the material, the wear-resistant drive tooth and the material move relative to each other, which can be A large positive squeezing force is generated on the surface, thereby generating a large friction force between the wear-resistant driving tooth working surface and the material. If the excavating machine material is hard rock, concrete, etc., the friction force of the machine will be Very large. As a result of the repeated action of this process, different degrees of surface wear are produced on the wear-resistant driving tooth working surface, resulting in a deeper furrow. The positive pressure of the front working surface is significantly greater than the rear working surface, and the front working surface is seriously worn. , It can be judged that positive pressure and friction are the main external mechanical factors for the failure of wear-resistant driving teeth, and they play a major role in the process of failure.
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