Back-swing electric servomotor device for water turbine

A technology of hydraulic turbines and servomotors, applied in safety devices, hydroelectric power generation, machines/engines, etc., can solve problems such as motion jamming, cumbersome maintenance, and large space occupation, and achieve high-precision linear motion, large range of motion, and space occupation small effect

Active Publication Date: 2021-05-18
WUHAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The servomotor in the traditional hydroelectric unit or hydraulic turbine model test device is mostly operated by hydraulic pressure, which takes up a lot of space, and the structure of the oil circuit is complicated, it is difficult to control the speed of the servomotor, the maintenance is cumbersome and the reliability is poor
The casting structure of the servomotor of some axial flow and tubular turbines is complex, welding is difficult, and the cost is high
The conventional servomotor is fixed in position and cannot rotate itself. The piston rod and the push-pull rod of the guide vane actuator are connected by a cardan shaft. Since the push-pull rod runs along the circumference of the volute, the servomotor can only move in a straight line, so dead zones often occur , motion jamming and other phenomena, and limit the range of motion of the push-pull rod
The existence of the above problems has brought adverse effects on the flexible control, safe, stable and efficient operation of hydropower units

Method used

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  • Back-swing electric servomotor device for water turbine
  • Back-swing electric servomotor device for water turbine
  • Back-swing electric servomotor device for water turbine

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Embodiment Construction

[0028] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0029] Such as figure 1 The shown rear-swing electric servomotor device for a water turbine is composed of a servo motor 1, an electric cylinder 4, a rotating base 3, a telescopic connecting rod, a guide sleeve 12, a linear displacement sensor 20 and a mechanical limit plate. Such as image 3 and Figure 4 As shown, the rotating base 3 includes a top plate 21, a vertical shaft 22, upper bearings 24 and 25, an upper support 27, and a lower support 26. The top plate 21 is fixed to the top cover of the water turbine by 4 bolts through the positioning screw holes 33 of the rotating base. Or on the water turbine layer platform 19, the upper support 27 and the lower support 26 clamp the trunnion 6 through the hexagon socket bolt 29, and the electric cylinder 4 is fixed on the rotating base 3, and the upper bearing 24 is placed on the uppe...

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PUM

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Abstract

The invention discloses a rear-swing electric servomotor device for a water turbine. The device of the present invention has the advantages of small occupied space, flexible degree of freedom, large stroke range, convenient control, etc., and can effectively avoid problems such as dead zone, jamming, and movable limit during the movement of the guide vane of the water turbine. As a rear-swing electric servomotor device, the present invention can be widely used in model test devices of various types of water turbines and pumped storage units; it can also flexibly select servo motors and electric cylinders according to the driving force requirements of guide vanes, and be applied in practice Hydropower stations and pumped storage power stations.

Description

technical field [0001] The invention belongs to the technical field of hydropower generation, and in particular refers to a rear-swing electric servomotor device for a water turbine. Background technique [0002] The servomotor is an indispensable part of the hydropower station and the pumped storage power station, and is the main part of the governor to control the opening and closing of the guide vane. The servomotor in the traditional hydroelectric unit or hydraulic turbine model test device is mostly operated by hydraulic pressure, which takes up a lot of space, and the structure of the oil circuit is complicated, it is difficult to control the speed of the servomotor, and the maintenance is cumbersome and the reliability is poor. The casting structure of the servomotor of some axial flow and tubular turbines is complicated, the welding is difficult and the cost is high. The conventional servomotor is fixed in position and cannot rotate itself. The piston rod and the pu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F03B15/04F03B3/18
CPCF03B3/183F03B15/04Y02E10/20
Inventor 赵志高杨建东彭涛王学武杨威嘉
Owner WUHAN UNIV
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