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Rotating disk cavitation and erosion experiment apparatus and method thereof

A cavitation cavitation and experimental device technology, applied in the direction of testing wear resistance, etc., can solve problems such as the unusable runner, blade damage, unit vibration, etc., to achieve the effect of convenient observation

Inactive Publication Date: 2018-01-26
HOHAI UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

The cavitation phenomenon of the water turbine causes the surface of the working parts of the water turbine to be eroded and peeled off on the one hand, causing pits or honeycomb holes to be formed in the flow-through parts of the water turbine. In severe cases, the blades will be damaged, so that the runner cannot be used; , reducing the efficiency and output of the turbine

Method used

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  • Rotating disk cavitation and erosion experiment apparatus and method thereof
  • Rotating disk cavitation and erosion experiment apparatus and method thereof
  • Rotating disk cavitation and erosion experiment apparatus and method thereof

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Embodiment

[0048] The method for cavitation cavitation erosion using the rotating disc cavitation erosion experimental device of the present invention comprises the following steps:

[0049] Step (1) Determine the type of cavitation that requires cavitation, determine the outlet pressure p of the water supply pump, and determine the speed n of the cavitation test plate;

[0050] Step (2) Valve opening and closing state: open valves k1, k2, k3, k4; close valves k5, k6;

[0051] Step (3) Put the cavitation test disk into the turntable chamber, install the circular cavitation test piece at the corresponding position, and arrange and install the sensors for signal collection and processing at the same time;

[0052] Step (4) Start the water supply pump and frequency converter, and supply water to the turntable chamber where the cavitation turntable is located through the water supply pump;

[0053] Step (5) Turn on the motor and adjust the speed of the cavitation test plate through the cont...

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Abstract

The invention discloses a rotating disk cavitation and erosion experiment apparatus and a method thereof. The rotating disk cavitation and erosion experiment apparatus comprises a water pump system, ameasure apparatus system, a rotating disk chamber, a motor system, and a water supply system, wherein the water pump system is composed of a water pump and a cycle water pump, and can supply water tothe whole experiment apparatus; the measure apparatus system is composed of an electromagnetic flowmeter, a rotating speed measuring instrument, a pressure meter and a thermometer, and is used for measuring flow, rotating speed, pressure, and temperature data of the whole apparatus; the rotating disk chamber is composed of a water inlet pipe, a drainage device, a front cover, a cavitation erosiontest disk, a choked flow grid and a motor shaft, and is a place for generating a cavitation erosion phenomenon; the motor system is composed of a motor and a control cabinet containing a frequency converter, and provides power for the experiment apparatus; and the water supply system is composed of a water collection pool and an underground reservoir, and can guarantee the normal operation of thewater system of the experiment apparatus. The rotating disk cavitation and erosion experiment apparatus is convenient for theory research for the cavitation and erosion phenomenon of a hydraulic machinery metal material in a laboratory.

Description

technical field [0001] The invention relates to a rotating disc cavitation erosion experimental device and method, belonging to the technical field of cavitation wear in hydraulic machinery. Background technique [0002] Cavitation and cavitation erosion are physical phenomena that exist objectively in nature and widely exist in hydraulic machinery. The process of generation, development and collapse of cavitation bubbles in the liquid flow due to pressure changes and the resulting series of physical and chemical changes are called cavitation. eclipse. Cavitation occurs in different parts of the turbine, there are three types of airfoil cavitation, cavity cavitation and gap cavitation. The cavitation phenomenon of the water turbine causes the surface of the working parts of the water turbine to be eroded and peeled off on the one hand, causing pits or honeycomb holes to be formed in the flow-through parts of the water turbine. In severe cases, the blades will be damaged, s...

Claims

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Application Information

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IPC IPC(8): G01N3/56
Inventor 葛新峰陈慧楠徐旭
Owner HOHAI UNIV
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