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Method and device for measuring rated guide vane water leakage of water turbine

A measurement method and technology of water turbines, applied in the direction of detecting fluid flow by measuring differential pressure, volume/mass flow generated by mechanical effects, etc. Possibilities, Improved Test Efficiency, Fast Results

Active Publication Date: 2017-09-05
STATE GRID CORP OF CHINA +3
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Problems solved by technology

[0005] In order to solve the problems existing in the existing measurement method due to the large number of parameters involved and the complicated test process, which lead to large errors in the measurement results and affect the construction period, the embodiment of the present invention provides a method and device for measuring the water leakage of the rated guide vane of a hydraulic turbine

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  • Method and device for measuring rated guide vane water leakage of water turbine
  • Method and device for measuring rated guide vane water leakage of water turbine
  • Method and device for measuring rated guide vane water leakage of water turbine

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Embodiment Construction

[0017] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are the Some, but not all, embodiments are invented. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0018] figure 1 The partial structure schematic diagram of the water turbine provided for the embodiment of the present invention; figure 1 As shown, the local structure includes the working gate 104 of the turbine, the vent hole 102, the movable guide vane 105, the draft tube 106, the upper flat section 107-1 of the inlet pipe, the inclined shaft section 107-2 of the ...

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Abstract

The invention provides a method and device for measuring rated guide vane water leakage of a water turbine. The method comprises the following steps: determining reference pressure head on the basis of pressure difference between water pressure in a water inlet pipe of the water turbine and water pressure in a tail water pipe when a flat pressing facility of the water turbine is closed; and determining the rated guide vane water leakage of the water turbine on the basis of the reference pressure head, the area of the horizontal cross section of an inclined shaft section of the water inlet pipe of the water turbine or the area of a ventilating hole of the water turbine. According to the method and device for measuring the rated guide vane water leakage of the water turbine, an algorithm is simple, calculating parameters are less, the water leakage of a gate does not need to be measured, and the testing efficiency of a testing field for the rated guide vane water leakage of the water turbine is improved effectively.

Description

technical field [0001] The invention relates to the technical field of on-site testing of hydroelectric power generation, in particular to a method and a measuring device for measuring water leakage of rated guide vanes of hydraulic turbines. Background technique [0002] Water leakage in the guide vanes of hydraulic turbines is a common problem. Excessive leakage of guide vanes will not only cause waste of water resources, but also aggravate gap cavitation damage, and even cause the turbine to fail to shut down normally; or, in the shutdown state, the guide vanes Excessive water leakage caused the turbine to squirm and cause the thrust tile and guide tile to be burned. Therefore, it is generally required to measure the water leakage of the guide vane before and after the overhaul of the turbine to check the sealing effect and check the maintenance and adjustment quality of the guide vane. [0003] The existing guide vane leakage measurement method is to express the nominal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01F1/34
CPCG01F1/34
Inventor 黄波毕智伟田海平肖剑张军乔亮亮
Owner STATE GRID CORP OF CHINA
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