High-pressure cavitation and erosion test device containing solid particle hydraulic oil and test method thereof

Abstract

The invention discloses a high-pressure cavitation and erosion test device containing solid particle hydraulic oil and a test method thereof. The characteristics of the device are that the device comprises a hydraulic oil storage tank, a pressurize pump, a cooler, a heater, a flow regulating valve, a liquid-solid mixing cavity, a shrinking nozzle, a visual test section, a hydrocyclone and a pressure control valve which are sequentially connected to form a circulation loop. The pressurize pump is connected to a two-position five-way solenoid valve; the two-position five-way solenoid valve is respectively connected to a first gas source for controlling the commutation of the two-position five-way solenoid valve and a second gas source for driving the pressurize pump; the outlet of the firstgas source is connected to the two-position five-way solenoid valve through a pneumatic filter and a first electric proportional valve; the second air source is connected to the two-position five-waysolenoid valve through a second electrical proportional valve. The high-pressure cavitation and erosion test device containing solid particle hydraulic oil and the test method thereof has advantages that high temperature and high pressure can be achieved and the particle feed amount can be continuously adjusted.

Description

technical field [0001] The invention relates to a high-pressure cavitation and cavitation test device for hydraulic oil, in particular to a high-pressure cavitation and cavitation test for hydraulic oil containing solid particles and a test method thereof. Background technique [0002] High pressure, high speed and high power have become the development trend of modern hydraulic technology. As the inlet pressure of hydraulic components increases, the flow rate of hydraulic oil increases, causing the pressure to drop rapidly. Cavitation occurs when the partial pressure within a hydraulic component is lower than the saturated vapor pressure of the hydraulic oil at that temperature. When the cavitation bubbles flow to the pressure recovery zone with the hydraulic oil, the external pressure of the flow field is higher than the internal pressure, and the cavitation bubbles will collapse. A large number of cavitation collapses will produce a series of adverse consequences such a...

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Problems solved by technology

[0003] The existing hydraulic oil cavitation and cavitation test devices mainly have the following defects: 1) Most of the cavitation and cavitation test research can only be carried out at room temperature, and the oil temperature of the hydraulic oil cannot be adjusted and controlled; 2) It does not involve The influence of solid particles on cavitation and cavitation of hydraulic oil; 3) The inlet pressure of the test section is generally lower than 6.0 MPa, and the cavitation and cavitation test under high pressure conditions cannot be carried out; 4) The cavitation and cavitation tests of hydraulic oil are mainly used in It is difficult to test the influence of cavitation flow on cavitation erosion in the same test section in real time if it is distributed in the same test section or carried out separately in two test sections; Research, and the establishment of the correlation between cavitation and cavitation have had a great impact

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