Maintenance tool for large water guide mechanism straight cylinder servomotor of hydraulic turbine generator unit

Abstract

The invention discloses a maintenance tool for a large water guide mechanism straight cylinder servomotor of a hydraulic turbine generator unit. Track height adjusting devices are mounted at the bottoms of axial traveling track assemblies. Axial traveling mechanisms are mounted on the axial traveling track assemblies in a rolling fit mode. Longitudinal slide rail assemblies are mounted on the axial traveling mechanisms. Longitudinal sliding mechanisms are mounted on the longitudinal slide rail assemblies in a sliding fit mode. The longitudinal sliding mechanisms are symmetrically arranged on the longitudinal slide rail assemblies. A hydraulic driving device is mounted between every two opposite longitudinal sliding mechanisms. Locking mechanisms are arranged on the longitudinal sliding mechanisms. The locking mechanisms are arranged on the two side faces of the corresponding longitudinal slide rail assemblies. A carrier roller mechanism is mounted on each longitudinal sliding mechanism. The hydraulic driving devices are connected with a hydraulic system. The maintenance tool can be used for conducting height adjustment and axial movement on a push-pull rod of the servomotor conveniently, so that the maintenance, disassembling and assembling efficiency is improved, the safety during the maintenance process is guaranteed, and workload of maintenance personnel is reduced.

Description

technical field [0001] The invention belongs to the field of auxiliary maintenance devices for a straight cylinder servomotor of a large-scale water guiding mechanism of a hydroelectric generating set, in particular to a maintenance tool for the straight cylinder servomotor of a large water guiding mechanism of a hydroelectric generating set. Background technique [0002] The function of the water guiding part in the hydro-generator set is to rotate the water flow before entering the runner, and to change the incident angle of the water flow. When shutting down due to an accident, the water guide part cuts off the water flow. [0003] The servomotor is the core component of the guide vane operating mechanism. Generally, large-scale turbines have two or more even-numbered servomotors, and their mechanisms are basically the same, with two main components: the servomotor cylinder and the piston. The servomotor cylinder is composed of a cylinder block, a front cylinder cover an...

AI Technical Summary

Problems solved by technology

[0004] If the unit runs for a long time, due to vibration and other reasons, the fastening parts of the servomotor of the governor will loosen, the fatigue damage of the parts and the aging of the seal will occur, which will cause the servomotor to move inaccurately, jam, Leakage and other phenomena occur, affecting the stable operation of the unit

It is necessary to dismantle and overhaul the push-pull rod of the servomotor, and the diameter of the push-pull rod of the servomotor is relatively large, and the weight is in tons. If a crane is used for hoisting, it will be limited by the space conditions of the plant and cannot be hoisted; if the traditional If scaffolding is used for support, its height cannot be adjusted conveniently, and its centering cannot be guaranteed, which will bring difficulties to subsequent installation and adjustment; if manual support is used for maintenance, there may be inconvenient support, which will lead to unsafe hidden dangers

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