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System for weakening pressure pulsation of draft tube of water-turbine generator set

A generator set, pressure pulsation technology, applied in the direction of hydropower, engine components, machines/engines, etc., to achieve the effect of reducing pressure pulsation

Inactive Publication Date: 2020-01-10
YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0005] This application provides a system for weakening the pressure pulsation of the draft tube of the hydroelectric generating set to solve the technical problems of eliminating circulation and adapting to different working conditions

Method used

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  • System for weakening pressure pulsation of draft tube of water-turbine generator set
  • System for weakening pressure pulsation of draft tube of water-turbine generator set
  • System for weakening pressure pulsation of draft tube of water-turbine generator set

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Embodiment Construction

[0036] In order to enable those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described The embodiments are only some of the embodiments of the present application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.

[0037] See attached figure 1 , figure 1 It shows a structural schematic diagram of a system for reducing the pressure pulsation of the draft tube of a hydroelectric generator set provided by an embodiment of the present invention. Attached below figure 1 A system for reducing the pressure pulsation of the draft pipe of the hydroelectric ge...

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Abstract

The invention provides a system for weakening pressure pulsation of a draft tube of a water-turbine generator set. The system comprises a runner body, a runner cone, a main shaft, a flow guide bladecontrol device and a spindle center air supply device. On one hand, the flow guide blade control device can change the angle of flow guide blades according to the operating condition of the water-turbine generator set, so that water current flowing out of a runner flows to the draft tube with a good posture, thus vortex strips of the draft tube are damaged, and the pressure pulsation of the drafttube is weakened; on the other hand, through an air supply valve, an air conveying pipeline and air supply holes, air is conveyed to an outlet of the runner body, and dissolved in water at the outletof the runner body, thus pressure at the outlet of the runner body is increased, then the low-pressure state at the outlet of the runner body is damaged, the vortex strips of the draft tube are further damaged, and the pressure pulsation of the draft tube is weakened; therefore, through the combination of the flow guide blades and the air supply device, the vortex strips of the draft tube are effectively damaged, the pressure pulsation of the draft tube is effectively weakened, and stable operation of the set is guaranteed.

Description

technical field [0001] The present application relates to the technical field of design optimization of hydroelectric generating units, and in particular to a system for reducing pressure pulsation of draft pipes of hydroelectric generating units. Background technique [0002] A hydroelectric generator set is a device that converts the kinetic energy and potential energy of water with a certain height of water head and flow into mechanical energy and finally into electrical energy; a hydroelectric generator set includes hydroelectric power generation equipment composed of a water turbine, a hydroelectric generator and its ancillary equipment , where the water turbine consists of a volute, a runner, and a draft tube. The role of the draft tube is to guide the water leaving the runner to the downstream outlet, and to utilize part of the energy of the water flow at the outlet of the runner. [0003] When the hydro-generator unit is running under partial working conditions, the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F03B3/18F03B15/00F03B11/04
CPCF03B3/183F03B11/04F03B15/00Y02E10/20
Inventor 陈晓云李寒熠邱方程陆海
Owner YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
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