Method for preventing looseness of rotating rod of feedback signal potentiometer of hydrogovernor

Abstract

The invention discloses a method for preventing looseness of a rotating rod of a feedback signal potentiometer of a hydrogovernor, relates to the field of actions of servomotors of hydrogovernors, and aims to solve the problems of set instability caused by looseness in the connecting place due to small contact area and small fastening force in a traditional connecting mode between a servomotor displacement transmission rod and a potentiometer rotating rod and limitation on a connecting environment. The surfaces of two ends of the servomotor displacement transmission rod are machined to threads with gradually decreased diameters, and are both provided with center holes inside; four annular grooves are uniformly formed on the side wall of each end in the peripheral direction of the center hole; two wedged nuts with growing internal threads are respectively inserted at one ends of two potentiometer rotating rods; one end of each potentiometer rotating rod is correspondingly screwed into the center hole of one end of the servomotor displacement transmission rod; and the two wedged nuts are tightened with the threads on the surface of one end of the servomotor displacement transmission rod after passing through one end of one potentiometer rotating rod. The method can be used for fixing the servomotor displacement transmission rod and the potentiometer rotating rod.

Description

technical field [0001] The invention relates to a method for preventing a rotating rod of a feedback signal potentiometer of a water turbine governor from loosening. It belongs to the action field of a hydraulic turbine governor servomotor. Background technique [0002] The safe operation of hydraulic turbines has always been concerned. There are various reasons for the dynamic instability of the turbine. Not all of them are related to technical content. As mentioned in this article, the inherent defect of a part of the governor, which has a simple linking process, buried hidden dangers in the regulating system of the turbine and once became a thorny problem in a power plant. Dealing with this fault must be carried out in an anhydrous state of the steel pipe. It is necessary to stop |, remove the backup, close the steel pipe valve to empty the steel pipe water, and then repeatedly adjust the opening of the guide vane and adjust the position of the potentiometer shaft and ...

AI Technical Summary

Problems solved by technology

[0006] The present invention aims to solve the problem that the connection between the existing servomotor displacement transmission rod and the potentiometer rotating rod has small contact area and small fastening force, which leads to loosening of the connection and instability of the unit

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