Cavitation-resistant structure surface layer

A technology of structural surface and surface layer, used in propellers, mechanical equipment, valve devices, etc., can solve problems such as failure and reduced turbine mechanical efficiency, and achieve reduced cavitation damage, good anti-cavitation effect, and easy assembly. Effect

Active Publication Date: 2018-01-16
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The cavitation damage of key components will reduce the efficiency of turbomachinery or even fail

Method used

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  • Cavitation-resistant structure surface layer
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  • Cavitation-resistant structure surface layer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Such as figure 2 As shown, the surface layer comprises a substrate 1 and a layer 2 of elastic material. The base 1 is a propeller, and the layer of elastic material is arranged on the surface of the propeller at the lowest pressure part away from the incoming flow direction.

[0028] The propeller is slotted, and the elastic material layer is a piece of rubber, which is embedded in the slot of the propeller.

[0029] During the implementation, the water flow is impacted and passed through the propeller. After testing, it is found that:

[0030] In the absence of the elastic material layer, the cavitation bubble collapsing jet forms cavitation erosion towards the propeller surface.

[0031] When the elastic material layer exists, the cavitation bubble collapse jet deviates from the elastic surface of the propeller, avoiding cavitation erosion.

Embodiment 2

[0033] Such as image 3 As shown, the surface layer comprises a substrate 1 and a layer 2 of elastic material. The base 1 is the valve core, and the elastic material layer is arranged on the surface of the lowest pressure part of the valve core.

[0034] In the valve, an annular groove is formed on the surface of the valve core facing the liquid inlet, and the elastic material layer is an annular rubber, which is embedded in the annular groove of the valve core.

[0035] During the implementation, the water flow is impacted and passed through the valve core. After testing, it is found that:

[0036] In the absence of the elastic material layer, the cavitation bubble collapsing jet forms cavitation towards the surface of the valve core.

[0037] When the elastic material layer exists, the cavitation bubble collapse jet deviates from the elastic surface of the valve core to avoid cavitation erosion.

[0038] It can be seen that the structure of the present invention is very s...

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PUM

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Abstract

The invention discloses a cavitation-resistant structure surface layer. The surface layer comprises a base and an elastic material layer arranged on the surface of the base and used for resisting cavitation; the elastic material layer is inlaid in or adheres to the base as a protective layer and is located on the portion or surface, impacted by liquid, of the base. By means of the cavitation-resistant structure surface layer, cavitation damage can be effectively inhibited, and thus important parts can be protected.

Description

technical field [0001] The invention relates to the industrial fields of water conservancy, hydraulic pressure, chemical industry, etc., and in particular relates to a structural surface layer for suppressing cavitation and reducing cavitation damage, as a protective layer for important components in a fluid system. Background technique [0002] Fluid machinery such as hydraulic pumps, valves and water conservancy machinery are subject to cavitation in modern high-demand applications. Cavitation refers to the process that when the partial pressure of the fluid is lower than the vaporization pressure of the liquid, steam or gas is formed inside the liquid to form vapor bubbles, that is, cavitation bubbles. When the cavitation bubble flows from the low-pressure area to the high-pressure area, the volume shrinks and collapses under the action of the high pressure of the surrounding liquid, followed by pressure shock waves, high-speed micro jets, and luminescence. Serious conse...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F03B11/00B64C11/00F16K51/00
CPCY02E10/20
Inventor 邹俊李博吉晨杨华勇
Owner ZHEJIANG UNIV
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