CN112683520B - Hydraulic valve cavitation erosion test device under multiphase flow condition and test method thereof - Google Patents
Hydraulic valve cavitation erosion test device under multiphase flow condition and test method thereof Download PDFInfo
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Abstract
The invention discloses a hydraulic valve cavitation erosion test device under multiphase flow conditions and a test method thereof, wherein the test device comprises a gas supply module, a liquid supply module, a gas-liquid mixing module, a vibration module, a cavitation test section and a cavitation test section; the gas supply module and the liquid supply module are mixed at the gas-liquid mixing module to output gas-liquid multiphase flow, the vibration module acts on the gas-liquid mixing module, the vibration module can enable the gas-liquid mixing module to output gas-liquid multiphase flow of multiple flow patterns by changing vibration acceleration and vibration frequency, the gas-liquid multiphase flow sequentially passes through a cavitation test section and a cavitation test section, a hydraulic valve is installed in the cavitation test section, and a test piece is installed in the cavitation test section. The invention can change the gas-liquid mixing state in the test device, thereby obtaining multiphase flow of various flow patterns, and can be used for analyzing the influence of the flow patterns of the multiphase flow on the cavitation and cavitation erosion of the medium in the hydraulic valve under the conditions of different gas contents.
Description
Technical Field
The invention relates to a hydraulic valve cavitation erosion test device and a test method thereof, in particular to a hydraulic valve cavitation erosion test device and a test method thereof under a multiphase flow condition.
Background
In important industrial fields such as water conservancy and hydropower, power generation, coal chemical industry, petrochemical industry and the like, the hydraulic valve needs to face the impact of gas-liquid-solid multi-flow-type multiphase flow with different components, when fluid flows through a throttling area of the hydraulic valve, pressure mutation is easy to generate, cavitation can happen to the fluid, finally cavitation erosion phenomena occur at an outlet and a downstream pressure recovery area of the hydraulic valve, the service life of the hydraulic valve is seriously influenced, and abnormal phenomena such as noise, vibration and the like are caused. Aiming at the mechanism and the law of fluid cavitation erosion, a large number of theoretical and experimental researches are carried out at present, a plurality of cavitation erosion test devices are designed to simulate various working conditions and carry out deep researches on the working conditions, the conventional cavitation erosion test device can only test multiphase flow of a single flow type generally, the application range is narrow, but the hydraulic valve needs to face the action of gas-liquid-solid multiphase flow of various flow types and components under different working conditions, and a specific test device needs to be selected for testing aiming at different working conditions, so that the realization difficulty is high, and huge cost is also consumed. Therefore, a test device capable of simulating the conditions that media with various gas-liquid ratios, gas-liquid-solid ratios, liquid-solid ratios and various flow patterns flow through the hydraulic valve is needed so as to be suitable for cavitation erosion simulation tests of the hydraulic valve under various working conditions.
Disclosure of Invention
The invention aims to provide a hydraulic valve cavitation erosion test device under a multiphase flow condition and a test method thereof. The invention can change the gas-liquid mixing state in the test device, thereby obtaining multi-phase flow of various flow patterns, and can be used for analyzing the influence of the flow patterns of the multi-phase flow on the medium cavitation and cavitation erosion in the hydraulic valve under the conditions of different gas contents.
The technical scheme of the invention is as follows: a hydraulic valve cavitation erosion test device under multiphase flow conditions comprises a gas supply module, a liquid supply module, a gas-liquid mixing module, a vibration module, a cavitation test section and a cavitation test section; the gas supply module and the liquid supply module are mixed at the gas-liquid mixing module to output gas-liquid multiphase flow, the vibration module acts on the gas-liquid mixing module, the vibration module can enable the gas-liquid mixing module to output gas-liquid multiphase flow of multiple flow patterns by changing vibration acceleration and vibration frequency, the gas-liquid multiphase flow sequentially passes through a cavitation test section and a cavitation test section, a hydraulic valve is installed in the cavitation test section, and a test piece is installed in the cavitation test section.
Compared with the prior art, the invention has the beneficial effects that: the vibration module is arranged at the gas-liquid mixing module, the gas-liquid mixing module can output gas-liquid multiphase flow of various flow patterns by changing the vibration acceleration and the vibration frequency, the cavitation erosion phenomenon of the hydraulic valve under various flow pattern working conditions can be simulated in one device, the application range is wide, and a good hardware basis is provided for the research of cavitation erosion of the hydraulic valve under the multiphase flow condition. Furthermore, the invention also provides two independent test sections for cavitation and cavitation erosion, and because the states of multiphase flow and the forming mechanism thereof are very complex, the multiphase flow and the forming mechanism thereof are difficult to distinguish and define by data at present, so the cavitation test section of the hydraulic valve is arranged for observing the cavitation flow state of gas-liquid multiphase flow at the outlet of the hydraulic valve, the cavitation test section is arranged for enabling the gas-liquid two-phase flow at the outlet of the hydraulic valve to impact a test piece at a high speed to form cavitation erosion, and the two test sections respectively play their roles, thereby providing a good simulation test for the cavitation erosion of the hydraulic valve under the condition of multiphase flow.
In the hydraulic valve cavitation erosion test device under the multiphase flow condition, the gas-liquid mixing module comprises a gas-liquid mixer, the gas-liquid mixer is connected with a hydraulic hose, and the hydraulic hose is connected with the cavitation test section; the vibration module comprises a vibration driving device, the vibration driving device is connected with a rigid connecting support, and vibration is transmitted to the hydraulic hose through the rigid connecting support.
In the device for testing cavitation and erosion of the hydraulic valve under the condition of multiphase flow, a visual pipeline is further connected between the hydraulic hose and the cavitation test section.
In the hydraulic valve cavitation erosion test device under the multiphase flow condition, a visual Laval nozzle is arranged at an inlet of the cavitation erosion test section.
In the hydraulic valve cavitation erosion test device under the multiphase flow condition, a particle feeding module is connected between the cavitation test section and the cavitation test section through a branch, and the particle feeding module can output solid particles which are mixed with gas-liquid multiphase flow output by the cavitation test section to form gas-liquid-solid multiphase flow; the particle feeding module comprises an electric screw particle feeding device and a contraction nozzle, and solid particles can be sprayed into the inlet of the visual Laval nozzle through the contraction nozzle.
In the device for testing cavitation and cavitation of the hydraulic valve under the condition of multiphase flow, the liquid supply module comprises a hydraulic oil tank, an electric proportional hydraulic pump and a liquid flowmeter which are sequentially connected, and the liquid flowmeter is connected with the gas-liquid mixer.
In the device for testing cavitation erosion of the hydraulic valve under the multiphase flow condition, the gas supply module comprises an air compressor, a gas storage tank, a flow regulating valve and a gas flowmeter which are sequentially connected, and the gas flowmeter is connected with a gas-liquid mixer.
In the hydraulic valve cavitation erosion test device under the multiphase flow condition, the device further comprises a recovery module, the recovery module comprises a gas-liquid separation tank, the gas-liquid separation tank is connected with two branches, one branch is connected to a gas supply module through a gas particle filter and a suction pump, and the other branch is connected to a liquid supply module through a hydraulic pump and a liquid particle filter.
In the device for the hydraulic valve cavitation and cavitation erosion test under the multiphase flow condition, the device further comprises an industrial personal computer, and the industrial personal computer is respectively connected with the gas supply module, the liquid supply module, the vibration module and the particle feeding module and respectively controls the gas supply module, the liquid supply module, the vibration module and the particle feeding module.
A hydraulic valve cavitation erosion test method under multiphase flow conditions comprises the following steps:
(1) starting an air compressor to generate compressed air, sequentially entering an air storage tank and a flow regulating valve, and then entering a gas-liquid mixer;
(2) starting the electro-hydraulic proportional hydraulic pump, conveying hydraulic oil in a hydraulic oil tank to a gas-liquid mixer, and mixing the hydraulic oil with compressed air output by an air storage tank;
(3) the compressed air and the hydraulic oil are mixed in the gas-liquid mixer to form gas-liquid multiphase flow, the gas-liquid multiphase flow enters the hydraulic hose, the vibration driving device is started, the gas-liquid mixing state in the hydraulic hose is changed by adjusting the vibration acceleration and the vibration frequency of the vibration driving device, the gas-liquid multiphase flow of a required flow pattern is obtained, and the flow pattern of the gas-liquid multiphase flow is observed and verified in the visual pipeline;
(4) the gas-liquid multi-phase flow at the outlet of the visual pipeline sequentially enters a cavitation test section, a visual Laval nozzle and a cavitation test section, the gas-liquid multi-phase flow with cavitation at the outlet of the hydraulic valve is observed in the visual Laval nozzle, and the gas-liquid multi-phase flow carries out a multi-phase flow cavitation test in the cavitation test section;
or starting the electric screw particle feeding device, mixing the particles with the gas-liquid multi-phase flow at the outlet of the cavitation test section through the contraction nozzle, sequentially feeding the mixed gas-liquid-solid multi-phase flow into the visual Laval nozzle and the cavitation test section, observing the distribution rule of the particles in the gas-liquid multi-phase flow in the visual Laval nozzle, and carrying out a multi-phase flow cavitation test on the gas-liquid-solid multi-phase flow in the cavitation test section;
(5) and the multiphase flow at the outlet of the cavitation test section enters a gas-liquid separation tank to separate hydraulic oil and compressed air, the hydraulic oil returns to a hydraulic oil tank after passing through an oil slurry pump, and the compressed air returns to an air storage tank through an air suction pump.
Drawings
FIG. 1 is a schematic diagram of the connection of components of the present invention;
fig. 2 is a schematic view of a connection structure between the vibration module and the hydraulic hose.
Reference numerals are as follows: 1-an air supply module, 2-a liquid supply module, 3-a gas-liquid mixing module, 4-a vibration module, 5-a cavitation test section, 6-a cavitation test section, 7-a hydraulic valve, 8-a test piece, 9-a visual Laval nozzle, 10-a particle feeding module, 11-an air compressor, 12-an air storage tank, 13-a flow regulating valve, 14-a gas flowmeter, 21-a hydraulic oil tank, 22-an electric proportional hydraulic pump, 23-a liquid flowmeter, 31-a gas-liquid mixer, 32-a hydraulic hose, 33-a visual pipeline, 41-a vibration driving device, 42-a rigid connecting support, 43-a hoop, 101-an electric screw particle feeding device, 102-a contraction nozzle and 111-a gas-liquid separation tank, 112-gas particle filter, 113-suction pump, 114-hydraulic pump, 115-liquid particle filter, 200-industrial control computer.
Detailed Description
The invention is further illustrated by the following figures and examples, which are not to be construed as limiting the invention.
Example 1: a hydraulic valve cavitation erosion test device under multiphase flow conditions is structurally shown in figures 1 and 2 and comprises a gas supply module 1, a liquid supply module 2, a gas-liquid mixing module 3, a vibration module 4, a cavitation test section 5 and a cavitation test section 6; the gas supply module 1 and the liquid supply module 2 are mixed at the gas-liquid mixing module 3 to output gas-liquid multiphase flow, the vibration module 4 acts on the gas-liquid mixing module 3, the vibration module 4 can enable the gas-liquid mixing module 3 to output gas-liquid multiphase flow of multiple flow patterns by changing vibration acceleration and vibration frequency, the gas-liquid multiphase flow sequentially passes through a cavitation test section 5 and a cavitation test section 6, a hydraulic valve 7 is installed in the cavitation test section 5, and a test piece 8 is installed in the cavitation test section 6.
The cavitation test section 5 is arranged for observing the cavitation flow state of gas-liquid multiphase flow at the outlet of the hydraulic valve 7, and the cavitation test section 6 is arranged for enabling the gas-liquid multiphase flow at the outlet of the hydraulic valve 7 to impact the test piece 8 at a high speed to form cavitation erosion. A hydraulic valve 7 is arranged in the cavitation test section 5, and after gas-liquid multiphase flow entering the hydraulic valve 7 flows through the hydraulic valve 7, part of liquid can be cavitated; and a test piece 8 is arranged in the cavitation erosion test section 6 and used for carrying out cavitation erosion tests.
Preferably, the gas-liquid mixing module 3 comprises a gas-liquid mixer 31, the gas-liquid mixer 31 is connected with a hydraulic hose 32, and the hydraulic hose 32 is connected with the cavitation test section 5; the vibration module 4 includes a vibration driving device 41, and the vibration driving device 41 is connected with a rigid connecting bracket 42 and transmits vibration to the hydraulic hose 32 through the rigid connecting bracket 42.
Further, 4 clips 43 are installed on the hydraulic hose 32, and the distance between each clip 43 is equal. The clamp 43 is connected with the rigid connecting bracket 42 by welding, the other end of the rigid connecting bracket 42 is provided with an internal thread, and a panel of the vibration driving device 41 is provided with a threaded hole which is connected with the panel by the thread.
The test device of the invention relates to horizontal multiphase flow, and bubble flow or mist flow can be formed when the vibration frequency of the hydraulic hose 32 is higher; when the vibration frequency of the hydraulic hose 32 is low, an air mass flow or slug flow is formed; under specific conditions, wave flow or annular flow can be formed, and can be selected according to the requirements of subsequent tests.
Preferably, a visualization pipeline 33 is further connected between the hydraulic hose 32 and the cavitation test section 5, and the visualization pipeline 33 can observe and verify multiphase flows of various flow patterns.
Preferably, a visual laval nozzle 9 is arranged at the inlet of the cavitation erosion test section 6, the visual laval nozzle 9 is semitransparent, and the cavitation flow state at the outlet of the hydraulic valve 7 can be observed in the visual laval nozzle 9.
An outlet of the cavitation test section 5 can generate gas-liquid multiphase flow containing cavitation bubbles, and after the gas-liquid multiphase flow passes through the visual Laval nozzle 9, the flow rate is further improved, so that a test piece 8 in the cavitation erosion test section 6 is impacted, and cavitation erosion is generated.
Preferably, a particle feeding module 10 is connected between the cavitation test section 5 and the cavitation test section 6 through a branch, and the particle feeding module 10 can output solid particles to be mixed with gas-liquid multi-phase flow output by the cavitation test section 5 to form gas-liquid-solid multi-phase flow; the particle feeding module 10 comprises an electric screw particle feeding device 101 and a converging nozzle 102, through which converging nozzle 102 solid particles can be injected at the inlet of the visualization laval nozzle 9.
In the test process, the electric screw particle feeding device 101 can be started or closed according to whether solid particles need to be added into the incoming flow or not, if the solid particles need to be added, the electric screw particle feeding device 101 is started, the feeding amount of the particles is continuously adjustable, the contraction nozzle 102 is used for spraying the solid particles from the inlet of the visual Laval nozzle, a tester can observe the distribution rule of the particles in gas-liquid multiphase flow through the visual Laval nozzle, and the cavitation erosion acceleration process of the cavitation flow at the outlet of the hydraulic valve 7 on the wall surface under the condition of containing the solid particles is analyzed.
Preferably, the liquid supply module 2 comprises a hydraulic oil tank 21, an electric proportional hydraulic pump 22 and a liquid flow meter 23 which are connected in sequence, the liquid flow meter 23 is connected with a gas-liquid mixer 31, and the flow rate of liquid is continuously adjustable.
Preferably, the air supply module 1 comprises an air compressor 11, an air storage tank 12, a flow regulating valve 13 and a gas flow meter 14 which are connected in sequence, wherein the gas flow meter 14 is connected with a gas-liquid mixer 31, and the flow of gas is continuously adjustable.
Preferably, the test device of the invention further comprises a recovery module, the recovery module comprises a gas-liquid separation tank 111, the gas-liquid separation tank 111 is connected with two branches, one branch is connected to the gas supply module 1 through a gas particle filter 112 and a suction pump 113, the gas particle filter 112 is used for filtering solid particles in compressed air, the other branch is connected to the liquid supply module 2 through a hydraulic pump 114 and a liquid particle filter 115, and the liquid particle filter 115 is used for filtering solid particles in hydraulic oil, so that the tested liquid, gas and solid can be classified and recovered, the test device is environment-friendly, and the cost is saved.
Preferably, the testing device of the present invention further comprises an industrial personal computer 200, wherein the industrial personal computer 200 is respectively connected with and controls the air supply module 1, the liquid supply module 2, the vibration module 4 and the particle feeding module 10, and specifically, the industrial personal computer 200 can control the start and stop of the air compressor 11, the electric proportional hydraulic pump 22, the vibration driving device 41 and the electric screw particle feeding device 101, and can adjust the vibration amplitude, the vibration acceleration and the vibration frequency of the vibration driving device 41. The cavitation and cavitation erosion processes of the hydraulic valve under the condition that incoming flow contains gas/solid can be simulated through the control of the industrial personal computer 200, namely the cavitation erosion phenomenon caused by cavitation flow at the outlet of the hydraulic valve and cavitation erosion phenomenon caused by cavitation flow when media with various gas-liquid ratios, gas-liquid-solid ratios, liquid-solid ratios and various flow patterns flow through the hydraulic valve can be simulated, and the flow rates of liquid and gas and the feeding amount of particles are continuously adjustable.
Example 2: a cavitation and cavitation erosion test method for a hydraulic valve under a multiphase flow condition is used for independently simulating cavitation and cavitation erosion states of media in the hydraulic valve under an incoming flow gas-containing condition, and comprises the following steps:
(1) starting an air compressor 11 to generate compressed air, and sequentially entering an air storage tank 12, a flow regulating valve 13 and a gas-liquid mixer 31;
(2) starting the electro-hydraulic proportional hydraulic pump 114, conveying the hydraulic oil in the hydraulic oil tank 21 to the gas-liquid mixer 31, and mixing the hydraulic oil with the compressed air output by the air storage tank 12, wherein the mixing proportion of gas and liquid can be adjusted according to the situation;
(3) the compressed air and the hydraulic oil are mixed in the gas-liquid mixer 31 to form gas-liquid multiphase flow, the gas-liquid multiphase flow enters the hydraulic hose 32, the vibration driving device 41 is started, the gas-liquid mixing state in the hydraulic hose 32 is changed by adjusting the vibration acceleration and the vibration frequency of the vibration driving device 41, the gas-liquid multiphase flow of a required flow pattern is obtained, and the flow pattern of the gas-liquid multiphase flow is observed and verified in the visual pipeline 33;
(4) the electric screw particle feeding device 101 is kept in a closed state, gas-liquid multiphase flow at the outlet of the visual pipeline 33 sequentially enters the cavitation test section 5, the visual Laval nozzle 9 and the cavitation test section 6, cavitation gas-liquid multiphase flow at the outlet of the hydraulic valve 7 is observed in the visual Laval nozzle 9, and a multiphase flow cavitation test is carried out on the gas-liquid multiphase flow in the cavitation test section 6;
(5) multiphase flow at the outlet of the cavitation test section 6 enters a gas-liquid separation tank 111 to be separated into hydraulic oil and compressed air, the hydraulic oil returns to the hydraulic oil tank 21 after passing through a hydraulic pump 114, and the compressed air returns to the air storage tank 12 through an air suction pump 113.
The starting and stopping of the air compressor 11, the electric proportional hydraulic pump 22, the vibration driving device 41 and the electric screw particle feeding device 101 are controlled by an industrial personal computer 200, and the industrial personal computer 200 is also responsible for adjusting the vibration amplitude, the vibration acceleration and the vibration frequency of the vibration driving device 41.
Example 3: a cavitation and cavitation erosion test method for a hydraulic valve under multiphase flow conditions is provided, and the embodiment simultaneously simulates cavitation and cavitation erosion states of media in the hydraulic valve under the conditions that incoming flow contains gas and solid, and comprises the following steps:
(1) starting an air compressor 11 to generate compressed air, and sequentially entering an air storage tank 12, a flow regulating valve 13 and a gas-liquid mixer 31;
(2) starting the electro-hydraulic proportional hydraulic pump 114, conveying the hydraulic oil in the hydraulic oil tank 21 to the gas-liquid mixer 31, and mixing the hydraulic oil with the compressed air output by the air storage tank 12, wherein the mixing proportion of gas and liquid can be adjusted according to the situation;
(3) the compressed air and the hydraulic oil are mixed in the gas-liquid mixer 31 to form gas-liquid multiphase flow, the gas-liquid multiphase flow enters the hydraulic hose 32, the vibration driving device 41 is started, the gas-liquid mixing state in the hydraulic hose 32 is changed by adjusting the vibration acceleration and the vibration frequency of the vibration driving device 41, the gas-liquid multiphase flow with the required flow pattern is obtained, and the flow pattern of the gas-liquid multiphase flow is observed and verified in the visual pipeline 33;
(4) starting an electric screw particle feeding device 101, mixing particles with gas-liquid multi-phase flow at an outlet of a cavitation test section 5 through a contraction nozzle 102, sequentially feeding the mixed gas-liquid-solid multi-phase flow into a visual Laval nozzle 9 and a cavitation test section 6, observing the distribution rule of the particles in the gas-liquid multi-phase flow in the visual Laval nozzle 9, carrying out a multi-phase flow cavitation test on the gas-liquid-solid multi-phase flow in the cavitation test section 6, and analyzing the cavitation erosion acceleration process of cavitation flow at an outlet of a hydraulic valve 7 on a wall surface under the condition of containing solid particles;
(5) multiphase flow at an outlet of the cavitation test section 6 enters a gas-liquid separation tank 111, hydraulic oil containing solid particles and compressed air containing the solid particles are separated, the hydraulic oil containing the solid particles returns to a hydraulic oil tank 21 after passing through a hydraulic pump 114, and a liquid particle filter 115 is arranged between the hydraulic pump 114 and the hydraulic oil tank 21 and used for filtering the solid particles in the hydraulic oil; the compressed air containing solid particles is returned to the air tank 12 through the suction pump 113, and a gas particle filter 112 for filtering solid particles in the compressed air is installed between the gas-liquid separation tank 111 and the suction pump 113.
The starting and stopping of the air compressor 11, the electric proportional hydraulic pump 22, the vibration driving device 41 and the electric screw particle feeding device 101 are controlled by an industrial personal computer 200, and the industrial personal computer 200 is also responsible for adjusting the vibration amplitude, the vibration acceleration and the vibration frequency of the vibration driving device 41.
Example 4: a cavitation erosion test method for a hydraulic valve under multiphase flow conditions is provided, and the embodiment of the method is used for independently simulating cavitation and cavitation erosion states of media in the hydraulic valve under the condition that incoming flow contains solid, and comprises the following steps:
(1) the air compressor 11 keeps a closed state, the electro-hydraulic proportional hydraulic pump 114 is started, and hydraulic oil in the hydraulic oil tank 21 is conveyed to the gas-liquid mixer 31;
(2) the hydraulic oil directly enters the hydraulic hose 32, the vibration driving device 41 is started, the liquid state in the hydraulic hose 32 is changed by adjusting the vibration acceleration and the vibration frequency of the vibration driving device 41, the fluid with the required flow pattern is obtained, and the flow pattern of the fluid is observed and verified in the visual pipeline 33;
(3) starting an electric screw particle feeding device 101, mixing particles with fluid at an outlet of a cavitation test section 5 through a contraction nozzle 102, enabling the mixed liquid-solid multiphase flow to sequentially enter a visual Laval nozzle 9 and a cavitation test section 6, observing the distribution rule of the particles in the liquid-solid multiphase flow in the visual Laval nozzle 9, and carrying out a multiphase flow cavitation test on the liquid-solid multiphase flow in the cavitation test section 6;
(4) multiphase flow at the outlet of the cavitation test section 6 enters a gas-liquid separation tank 111 to separate hydraulic oil containing solid particles, the hydraulic oil containing the solid particles returns to the hydraulic oil tank 21 after passing through a hydraulic pump 114, and a liquid particle filter 115 is arranged between the hydraulic pump 114 and the hydraulic oil tank 21 and used for filtering the solid particles in the hydraulic oil.
The start and stop of the electric proportional hydraulic pump 22, the vibration driving device 41 and the electric screw particle feeding device 101 are controlled by the industrial personal computer 200, and the industrial personal computer 200 is also responsible for adjusting the vibration amplitude, the vibration acceleration and the vibration frequency of the vibration driving device 41.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
The above are only preferred embodiments of the present invention, and the scope of the present invention is not limited to the above examples, and all technical solutions that fall under the spirit of the present invention belong to the scope of the present invention. It should be noted that modifications and adaptations to those skilled in the art without departing from the principles of the present invention should also be considered as within the scope of the present invention.
Claims (7)
1. A hydraulic valve cavitation erosion test device under multiphase flow conditions is characterized in that: the device comprises a gas supply module (1), a liquid supply module (2), a gas-liquid mixing module (3), a vibration module (4), a cavitation test section (5) and a cavitation test section (6); the gas supply module (1) and the liquid supply module (2) are mixed at the gas-liquid mixing module (3) to output gas-liquid multiphase flow, the vibration module (4) acts on the gas-liquid mixing module (3), the vibration module (4) can enable the gas-liquid mixing module (3) to output gas-liquid multiphase flow of various flow patterns by changing vibration acceleration and vibration frequency, the gas-liquid multiphase flow sequentially passes through a cavitation test section (5) and a cavitation test section (6), a hydraulic valve (7) is installed in the cavitation test section (5), and a test piece (8) is installed in the cavitation test section (6);
a visual Laval nozzle (9) is arranged at an inlet of the cavitation test section (6); a particle feeding module (10) is connected between the cavitation test section (5) and the cavitation test section (6) through a branch, and the particle feeding module (10) can output solid particles which are mixed with gas-liquid multiphase flow output by the cavitation test section (5) to form gas-liquid-solid multiphase flow; the particle feeding module (10) comprises an electric screw particle feeding device (101) and a convergent nozzle (102), and solid particles can be sprayed into the inlet of the visual Laval nozzle (9) through the convergent nozzle (102).
2. The device of claim 1 for testing cavitation erosion of hydraulic valve under multiphase flow conditions, wherein: the gas-liquid mixing module (3) comprises a gas-liquid mixer (31), the gas-liquid mixer (31) is connected with a hydraulic hose (32), and the hydraulic hose (32) is connected with the cavitation test section (5); the vibration module (4) comprises a vibration driving device (41), the vibration driving device (41) is connected with a rigid connecting support (42), and vibration is transmitted to the hydraulic hose (32) through the rigid connecting support (42).
3. The device for testing cavitation and cavitation of the hydraulic valve under the condition of multiphase flow according to claim 2, is characterized in that: a visual pipeline (33) is also connected between the hydraulic hose (32) and the cavitation test section (5).
4. A hydraulic valve cavitation erosion test apparatus under multiphase flow conditions as claimed in claim 1, 2 or 3, wherein: the liquid supply module (2) comprises a hydraulic oil tank (21), an electric proportional hydraulic pump (22) and a liquid flowmeter (23) which are sequentially connected, and the liquid flowmeter (23) is connected with a gas-liquid mixer (31).
5. A hydraulic valve cavitation erosion test device under multiphase flow conditions as claimed in claim 1, 2 or 3, wherein: the gas supply module (1) comprises an air compressor (11), a gas storage tank (12), a flow regulating valve (13) and a gas flowmeter (14) which are sequentially connected, wherein the gas flowmeter (14) is connected with a gas-liquid mixer (31).
6. A hydraulic valve cavitation erosion test apparatus under multiphase flow conditions as claimed in claim 1, 2 or 3, wherein: the device is characterized by further comprising a recovery module, wherein the recovery module comprises a gas-liquid separation tank (111), the gas-liquid separation tank (111) is connected with two branches, one branch is connected to the gas supply module (1) through a gas particle filter (112) and a suction pump (113), and the other branch is connected to the liquid supply module (2) through a hydraulic pump (114) and a liquid particle filter (115).
7. The device for testing cavitation and cavitation of the hydraulic valve under the condition of multiphase flow according to claim 1, is characterized in that: the particle feeder is characterized by further comprising an industrial personal computer (200), wherein the industrial personal computer (200) is respectively connected with the gas supply module (1), the liquid supply module (2), the vibration module (4) and the particle feeding module (10) and respectively controls the gas supply module, the liquid supply module, the vibration module and the particle feeding module.
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