Low speed high torque hydraulic motor The drive mode has been more applicable to nonferrous industry equipment because of its advantages of adapting to low speed, heavy duty, large torque and stepless speed regulation. However, it is the first time to apply this drive mode to the drive near the ball mill in China, and there is no report and application in the world
two Hydraulic motor Driving system composition and principle
The hydraulic motor drive system contains low speed High torque hydraulic motor And hydraulic power oil station, with a difference of about 8m. The power oil station transmits driving force to the hydraulic motor through the oil pipe
2.1 Low speed high torque hydraulic motor
The long shaft can be withdrawn by hydraulic drive in the drive near the ball mill, but the input end of the pinion shaft needs to be optimized according to the installation method of the hydraulic motor. The installation method is shown in Figure 1. The CA100 radial plunger type low speed high torque hydraulic motor of Ruiquhegelon Company is used in the figure
1. Its full displacement is 6.28V/r, rated speed is 190r/min, and rated output torque can reach 30000N-m
The pinion shaft 5 is supported by two end bearings (bearing 12 is only shown in the figure). The input end of the pinion shaft is a smooth shaft, and the output shaft 10 of the hydraulic motor is
The output end of the hollow shaft is a smooth hole. During installation, the hydraulic motor is loosely sleeved on the smooth shaft of the pinion shaft, and the screw on the locking plate 8 is tightened. The locking plate is tightened. The tightening force makes the wedge sleeve 9
Then the hollow shaft 10 forms elastic retraction and transmits torque by virtue of the great friction force on the matching surface of the hole and shaft in the rotating link
The hydraulic motor housing is hinged with the pull rod 3 through the torque arm 2 fixed on it, and the pull rod 3 is hinged with the connecting block 11 fixed on the base 4
In this way, it is possible to keep the hydraulic pressure to the housing from turning easily
The above installation methods have the following characteristics:
(1) The output shaft of the hydraulic motor is matched with the pinion shaft without clearance and coaxiality deviation. At the same time, when the pinion shaft has radial runout, the hydraulic motor will also follow the corresponding runout, and there will be no additional vibration and impact caused by the coaxiality deviation of the two shafts
(2) The hydraulic motor means that the hydraulic oil is used as the working medium. Therefore, the ball mill can be started stably with low impact load
(3) The inlet, outlet and drain ports of the hydraulic jack are connected with the output pipe of the hydraulic power oil station by means of hoses, so that the vibration of the external structure is not easily transmitted to the pinion shaft through the hydraulic motor