Optimized Design of Rexroth Rotary Hydraulic System
In view of the fault phenomenon of damage to the rotary mechanism broken tooth,broken shaft and Rexroth A2FE rotary hydraulic motor oil port connection plate 192 caused by the start impact of the rotary mechanism of large mining hydraulic excavator and the reverse rotation of the brake stop instantaneous loading assembly,the starting and braking characteristics of the rotary transmission system were optimized by adding hydraulic components such as rotary buffer valve and pressure transmitter,to reduce the impact of the rotary mechanism when starting braking,and prolong its service life.The results show that compared with the rotary hydraulic system be-fore optimization,the time between the starting of the output shaft pinion of the rotary reducer and the contact of the rotary roller wheel teeth of the optimized rotary hydraulic system is extended from 0.5 s to 1 s under the condition of the same tooth side clearance,which effectively reduces the starting impact of the system.At the moment of braking stop,the maximum pressure difference between ports A and B of the rotary motor is reduced from 3.6 MPa to 2.0 MPa,which suppresses the phenomenon of brake swing,reduces brake impact,and significantly improves handling comfort.The trouble-free operating time of the rotary hydraulic system is increased from 1 000 h to 5 368 h.
rotary hydraulic systemrotary buffer valveimpacttooth side clearance
万方数据
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