When a large hydraulic excavator rotates and debugs the whole machine, the operation is not stable and the noise exceeds the standard. Through investigation and analysis, it is found that most of the previous abnormal noise treatment methods of rotary mechanism are to replace the frame, rotary support, rotary motor and chassis related to the rotary mechanism of excavator respectively, until the rotary mechanism no longer produces abnormal noise.
The disadvantages of solution for abnormal noise of rotary mechanisim of excavator:On the one hand, it is necessary to disassemble and reassemble the excavator, and it can not ensure that the problem can be solved by one disassembly and reassembly, which wastes a lot of human, material and financial resources. On the other hand, this treatment is not conducive to the rapid solution of similar problems and avoid the recurrence of similar problems.
The rotary mechanism of hydraulic excavator is mainly composed of rotary support, rotary motor, rotary control valve providing working oil for rotary motor and pilot control handle for remote control of rotary action. By analyzing the composition of rotary mechanism of hydraulic excavator, the abnormal noise of rotary mechanism can be divided into abnormal noise of rotary mechanism caused by hydraulic system fault and abnormal noise of rotary mechanism caused by mechanical fault. The failure of hydraulic system usually leads to the slowness and weakness of the rotary mechanism, which is not easy to cause the abnormal noise of the rotary mechanism. Even if the abnormal noise is caused, it is easy to determine the abnormal noise by the sound because of which hydraulic element.