Hydraulic servomotor for hydroelectric generating set

Abstract

The invention relates to a hydraulic servomotor for a hydroelectric generating set, which comprises a piston, a piston rod and a cylinder barrel, wherein the front and rear ends of the cylinder barrel are respectively provided with a front cylinder cover and a rear cylinder cover, the piston is in hydraulically sealing fit and arranged in the cylinder barrel, and the piston is fixedly connected with the piston rod; one end of the piston rod protrudes out of the cylinder barrel, and the piston rod is rotatably connected with a connecting mechanism by a connecting pin; and the connecting mechanism comprises an upper connecting plate and a lower connecting plate, and a connecting part between the connecting pin and the upper connecting plate and a connecting part between the connecting pin and the lower connecting plate are respectively provided with a fiber-wound bearing. Because of adopting the fiber-wound bearings, the hydraulic servomotor of the invention is convenient for processing and installation, and has high load capacity, good impact resistance, high boundary bearing capacity, low friction, abrasion resistance, corrosion resistance, good dimensional stability, low moisture absorption and no expansion.

Description

technical field [0001] The invention relates to the technical field of hydro-generator sets, in particular to a servomotor used for a hydro-generator set to drive a water-guiding mechanism of a hydro-generator set or operate a butterfly valve. Background technique [0002] The water guiding mechanism is composed of a top cover, a bottom ring, guide vanes, a connecting rod mechanism and a servomotor. The servomotor is a hydraulic actuator (that is, the oil cylinder in the hydraulic system) specially matched with the water turbine and the water inlet valve. The servomotor is similar to the oil cylinder. It mainly includes piston, piston rod, cylinder barrel, front cylinder head and rear cylinder head, etc. The piston rod of the servomotor reciprocates in the cylinder barrel, and the front end of the piston rod extends out of the cylinder head to connect with the connecting rod mechanism. The position of the guide vane controls the opening of the guide vane, changes the flow of...

AI Technical Summary

Problems solved by technology

The piston rod extends out of the cylinder head and connects with the connecting rod mechanism. In the prior art, there is usually a connecting mechanism between the piston rod and the connecting rod mechanism. The connecting part of the piston rod and the connecting mechanism is provided with a steel sleeve. The disadvantage of the steel sleeve: low load capacity , no impact resistance, high friction coefficient, easy to wear, not corrosion resistant, etc.

Images