Special tool for pulling out woodruff key of crank arm of water guide mechanism of water turbine

Abstract

The invention discloses a special tool for pulling out a woodruff key of a crank arm of a water guide mechanism of a water turbine. The special tool is composed of a full-thread pull rod, a hollow pedestal, a hollow hydraulic jack, a gasket, a nut and an electric pressure pump, wherein the bottom end of the full-thread pull rod is matched with a screw hole of the woodruff key, the hollow pedestal, the hollow hydraulic jack, the gasket and the nut are sequentially installed on the full-thread pull rod from bottom to top, the bottom end of the hollow pedestal is pressed against a guide vane shaft head and the crank arm, and the hollow hydraulic jack is connected with the electric pressure pump through a pipeline. The special tool is simple in structure, convenient to operate, safe, reliable and high in working efficiency, saves labor, and effectively solves the problem that the woodruff key consumes labor and is difficult to pull out.

Description

technical field [0001] The invention belongs to the technical field of special tools, in particular to a special tool for pulling out a semicircular key of a crank arm of a hydraulic turbine water guiding mechanism. Background technique [0002] At present, there is no effective method for the half-round key of the crank arm of the hydraulic turbine water guide mechanism. Usually, a T-shaped tie rod is screwed into the screw hole of the head of the half-round key, and screw jacks are added to both sides of the T-shaped tie rod. Two people shake the jack at the same time to make the T-shaped Pull out the semi-circular key under the force of the T-shaped tie rod. In this pull-out method, it is difficult to control the consistent output of two people, and the output is inconsistent. The force on both sides of the T-shaped tie rod is unbalanced. There are often the following problems: The arm is broken; ②It cannot be pulled out, and one person taps on the T-shaped lever; ③The ha...

AI Technical Summary

Problems solved by technology

[0002] At present, there is no effective method for the half-round key of the crank arm of the hydraulic turbine water guide mechanism. Usually, a T-shaped tie rod is screwed into the screw hole of the head of the half-round key, and screw jacks are added to both sides of the T-shaped tie rod. Two people shake the jack at the same time to make the T-shaped Pull out the semi-circular key under the force of the T-shaped tie rod. In this pull-out method, it is difficult to control the consistent output of two people, and the output is inconsistent. The force on both sides of the T-shaped tie rod is unbalanced. There are often the following problems: The arm is broken; ②It cannot be pulled out, and one person taps on the T-shaped lever; ③The half-round key is hard to pull out.

Images