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Water erosion test device

A test device, water erosion technology, applied in the direction of testing wear resistance, using repetitive force/pulsation force to test the strength of materials, etc., can solve the problems of inability to achieve precise control of pressure and damage area, long test time, etc.

Inactive Publication Date: 2010-08-18
湖南省湘电锅炉压力容器检验中心有限公司
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the device adjusts the impact speed through the blade rotation speed, and the water droplets are distributed randomly in space during the impact process, the precise control of the pressure and damage area cannot be achieved, resulting in a long test time

Method used

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Embodiment Construction

[0016] The structure of the present invention is as figure 1 As shown, it consists of a high-pressure pulse water jet device and a workpiece clamping table; the high-pressure pulse water jet device includes a water tank 3 and a water pump device 5, the water pump device 5 is connected to the water tank 3, and the water pump device 5 adopts a three-plunger pump. The outlet pipe 6 of the water device 5 is connected with a return pipe 8 and a jet pipe 21, the jet pipe 21 is equipped with a pressure gauge 9 and a nozzle 10, the return pipe 8 is connected with the water tank 3, and the return pipe 8 is provided with an electric pressure relief valve 7; The workpiece clamping table includes a turntable 13 provided with clamps 12, the periphery of the turntable 13 is provided with a glass edge 11, and the lower half of the glass edge 11 has a drain hole 22 with a diameter of 2mm, and the turntable 13 is installed on the motor 14, and the motor 14 is contained on the lifting device 15...

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Abstract

The invention discloses a water erosion test device which comprises a high-voltage pulse water jet device and a workpiece clamping table; the high-voltage pulse water jet device comprises a water tank and a water pumping device, wherein the water pumping device is connected with the water tank, a water outlet pipe of the water pumping device is connected with a water return pipe and a jet pipe, a pressure gauge and a nozzle are installed on the jet pipe, the water return pipe is connected with the water tank, and a pressure relief valve is arranged on the water return pipe; the nozzle is arranged above the workpiece clamping table; and the water erosion test device also comprises a control plate, and the control plate is connected with the water pumping device, the pressure gauge and the pressure relief valve of the high-voltage pulse water jet device and a motor and a hoisting device of the workpiece clamping table through leads. Compared with the prior art, the device has the advantages that the equipment structure is simple, and meanwhile, the water erosion test process also can be accurately simulated, the test cost is greatly lowered, and the device is easy to control and has short test time.

Description

technical field [0001] The invention relates to a water erosion test device, which belongs to the technical field of fluid machinery. Background technique [0002] Turbine blade failure is one of the leading causes of power plant shutdowns. The water erosion of the last stage blade of the steam turbine refers to the phenomenon that the moving blade working in the wet steam area collides with the secondary water droplets entrained in the air flow at high speed, resulting in the damage and peeling off of the surface material of the last stage blade. The serrated burrs formed by the water erosion on the steam outlet edge of the final stage blade of the steam turbine will cause stress concentration and reduce the area of ​​the root section of the blade, affect the vibration characteristics of the blade, greatly weaken the strength of the blade, and deteriorate the aerodynamic performance of the blade cascade. Stage efficiency declines; severe water erosion of the blades increas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/56G01N3/36
Inventor 谢国胜杨兵丁辉杨湘伟万克洋
Owner 湖南省湘电锅炉压力容器检验中心有限公司
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