Water Pump Turbine Spatial Surface Guide Vane

A technology of water pump turbine and guide vane, which is applied in the field of hydraulic machinery to achieve the effect of improving operation stability, reasonable distribution and eliminating influence

Inactive Publication Date: 2011-12-21
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Practice has shown that the stability of the turbine is not limited to the disturbance of the runner and the pressure pulsation of the draft tube. The unstable flow of the water flow inside the water guide part of the turbine also affects the safety and stability of the turbine.

Method used

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  • Water Pump Turbine Spatial Surface Guide Vane
  • Water Pump Turbine Spatial Surface Guide Vane
  • Water Pump Turbine Spatial Surface Guide Vane

Examples

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Embodiment Construction

[0034] like figure 2 and image 3 As shown, the space curved guide vane of the water pump turbine mainly includes: an upper end surface (1), a lower end surface (2) and a ruled surface (3) composed of several straight lines between the upper and lower end surfaces. The connection point A between the guide vane water inlet (4) and the upper end surface (1) and the rotation center O of the guide vane on the upper end surface form a straight line OA, and the connection point A' between the guide vane water inlet edge (4) and the lower end surface (2) It is connected with the rotation center O' of the guide vane on the lower end surface to form a straight line O'A', and the straight line OA and the straight line O'A' are not parallel to each other and not in the same plane.

[0035] In the above implementation method, the water inlet side (4) of the guide vane is the high-pressure side of the guide vane, that is, the water flow inflow side of the turbine working condition.

[0...

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Abstract

The invention discloses a special curved guide vane of a pump turbine, which mainly comprises an upper end face, a lower end face and a ruled surface. The ruled surfaces is arranged between the upper end face and the lower end face and comprises a plurality of straight lines, a connecting point A of the water inlet edge of the guide vane and the upper end face and a rotating center O of the guide vane on the upper end face are connected to form a straight line OA, a connecting point A' of the water inlet edge of the guide vane and the lower end face and a rotating center O' of the guide vane on the lower end face are connected to form a straight line O'A', and the straight line OA and the straight line O'A' are not parallel and are not arranged in the same plane. Based on the same function of cutting off water flow like the traditional guide vane, hydraulic losses of a grating with double rows of vanes can be reduced, and the working condition and efficiency of the turbine can be improved. Moreover, the distribution of circulation at the inlet of a rotating wheel and the operating stability of the pump turbine can be improved.

Description

Technical field: [0001] The invention belongs to the technical field of hydraulic machinery, in particular to a movable guide vane of a water pump turbine. technical background: [0002] The movable guide vane of the water pump turbine has two functions: the working condition of the water turbine bears the function of forming circulation and controlling the flow; the working condition of the water pump adjusts the direction of the outlet water flow to adapt to the flow of the volute. The guide vanes in the above two working conditions have the function of cutting off the water flow. It can be seen that the guide vane of the pump turbine is an important part to ensure that the pump turbine has good hydraulic performance and reliability. After long-term development, the turbine guide vane has been basically finalized. [0003] The existing water turbine guide vanes have the following two situations: [0004] 1. If Picture 1-1 As shown, in the axial direction of the guid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F03B3/18
CPCY02E10/223Y02E10/20
Inventor 纪兴英赖旭赖弈
Owner WUHAN UNIV
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