Servomotor locking spindle end cover sealing device

Abstract

Disclosed is a sealing device of a servomotor lock end cover. The sealing device of the servomotor lock end cover comprises the lock end cover and a lock piston rod, wherein a reset spring is arranged on the inner side of the lock end cover, a flange is arranged on the inner side of the lock end cover, the flange is connected with a combined sealing pressing plate, a combined sealing device is arranged between the flange and the combined sealing pressing plate, a fixing disk is arranged on the outer side of the lock end cover, a sealing cover is arranged on the outer side of the fixing disk, the fixing disk and the lock end cover are fixedly welded, the fixing disk is provided with fixing threaded holes, the inner cylindrical surface of the sealing cover is inserted into an annular hole of the fixing disk, and a U-shaped sealing ring is arranged between the inner end face of the sealing cover and the outer end face of the lock end cover. According to the sealing device of the servomotor lock end cover, a seal is additionally arranged outside the lock end cover, every time the leakage phenomenon happens, a sealing gland can be adjusted at any time or the seal can be replaced at any time, operation is convenient, and a set can still be adjusted smoothly even though the set is in operation.

Description

technical field [0001] The invention relates to a sealing device, in particular to a sealing device for a locking spindle end cover of a servomotor. Background technique [0002] The mixed-flow reversible hydro-generator set uses two sets of servomotors, the main and auxiliary, to complete the adjustment task of the guide vane. The main servomotor is equipped with an automatic locking spindle, which is put into operation when the unit is in standby state. The withdrawal and input of the lock spindle are completed by the cooperation of oil pressure and spring. When the unit is turned on, the oil pressure acts on the opening of the lock spindle piston to overcome the resistance of the spring part to withdraw the lock spindle, and the servomotor can operate to operate the guide vane. When the unit is shut down, the spindle lock is activated by the force of the spring to realize the spindle lock function. At present, there is a relatively serious leakage problem at the end cove...

AI Technical Summary

Problems solved by technology

This is inseparable from the frequent start and stop of the unit and the frequent movement of the lock spindle. The frequent movement of the lock spindle will inevitably cause the combined seal to wear and eventually lead to oil leakage

If it is not dealt with, the oil spill problem will become more serious and cause greater economic losses

For this reason, the combined seal inside the end cover was replaced and the sealing gland was adjusted accordingly in the previous maintenance. However, after running for a period of time, due to the wear of the seal, the gland could not be adjusted inside, and it would fail again. oil spill

If the combination seal is replaced or the gland is adjusted, the pressure oil in the servomotor must be discharged, which is time-consuming and labor-intensive, which brings great inconvenience to the maintenance work

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