Roots pump test bed suitable for multiple types of media

Abstract

The invention belongs to the technical field of roots pump testing, and particularly relates to a roots pump test bench suitable for multiple types and multiple media, in the roots pump test bench, a test pump is driven by a power mechanism to move, and different gas media are introduced into a cloth-sandwiched silicone tube and a pressure relief tank through different pipeline communication modes and different on-off modes of a valve group during testing, so that the testing efficiency is improved; according to the invention, the gas medium is introduced into the test chamber, and the introduction mode of the gas medium is changed according to the property of the gas medium, so that the problem that different gas mediums are mixed and interfered with each other is eliminated; the performance and the reliability of the test pump can be judged according to the acquired data; according to the invention, the gases with different properties are introduced into the roots pump for testing, so that the problem that the actual test result may have deviation when the gas property difference is large is avoided, and meanwhile, the problem of test result deviation caused by mixing of the gases with different properties in the test process is effectively solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of Roots pump testing, and particularly relates to a Roots pump test bench applicable to multiple models and multiple media. Background Art

[0002] Roots pumps are widely used in fields such as petrochemical industry, semiconductor equipment, ships, and hydrogen circulation in fuel cells of new energy vehicles. With the promotion of energy conservation, emission reduction, and intelligent development, the requirements for equipment fault diagnosis, vibration signal acquisition, and performance testing are continuously increasing. Especially in the on-vehicle fuel cell hydrogen circulation system, the performance and reliability requirements for Roots pumps are more stringent.

[0003] Due to the wide application scenarios of Roots pumps, the types of gases they transport are diverse. Currently, most testings use air as the medium to replace the testing of different gases, and the result trends are somewhat similar to a certain extent. However, when the gas properties vary greatly, there may be significant deviations in the actual test results. Summary of the Invention

[0004] The purpose of the present invention is to provide a Roots pump test bench applicable to multiple models and multiple media to solve the above problems.

[0005] To achieve the above purpose, the present invention provides the following solutions:

[0006] A Roots pump test bench applicable to multiple models and multiple media, comprising:

[0007] A support part;

[0008] A test pump, fixedly installed on the support part;

[0009] A power mechanism, fixedly installed on the support part and drivingly connected to the test pump;

[0010] A first acquisition mechanism, arranged on the power mechanism and the power mechanism;

[0011] Two reinforced silicone hoses, respectively communicating with the intake end and the outlet end of the test pump;

[0012] A second acquisition mechanism, arranged on the two reinforced silicone hoses;

[0013] A valve group, arranged on the reinforced silicone hose communicating with the inlet end of the test pump, and the valve group is located at the end of the reinforced silicone hose far from the test pump;

[0014] A pressure relief tank, arranged on the reinforced silicone hose communicating with the outlet end of the test pump, and the pressure relief tank is located at the end of the reinforced silicone hose far from the test pump;

[0015] In the air medium test mode, the valve group is communicated with the air purification component and the pressure relief tank;

[0016] In the low-density gas medium test mode, during inflation, the valve group is communicated with the gas supply mechanism and the pressure relief tank, and the gas medium enters through the valve group and is discharged through the pressure relief tank;

[0017] In the high-density gas medium test mode, during inflation, the pressure relief tank is communicated with the gas supply mechanism and the valve group, and the gas medium enters through the pressure relief tank and is discharged through the valve group.

[0018] Preferably, the support part includes:

[0019] A bench;

[0020] A plurality of adjustable floor feet, which are arrayed and distributed at the bottom end of the bench, and the adjustable floor feet are threadedly connected to the bench;

[0021] A bearing plate, which is fixedly installed on the top surface of the bench, and a plurality of T-shaped grooves are formed on the top surface of the bearing plate. The T-shaped grooves are arranged along the length direction of the bearing plate, and the plurality of T-shaped grooves are equally spaced along the width direction of the bearing plate;

[0022] A plurality of installation components are respectively arranged in the plurality of T-shaped grooves. The top ends of the installation components pass through the T-shaped grooves, and the installation components are used to install the cloth-clamped silicone tube, the valve group and the air purification component.

[0023] Preferably, the power mechanism includes:

[0024] A motor, which is fixedly installed on the top surface of the bearing plate;

[0025] A bearing seat, the input end of which is coaxially and fixedly connected to the output shaft of the motor, and the output end of the bearing seat is in transmission connection with the power end of the test pump.

[0026] Preferably, the first acquisition mechanism includes:

[0027] A vibration transmitter, which is fixedly installed on the bearing seat;

[0028] A torque meter, the input end of which is coaxially and fixedly connected to the output end of the bearing seat through a coupling, and the output end of the torque meter is coaxially and fixedly connected to the power input end of the test pump.

[0029] Preferably, the second acquisition mechanism includes:

[0030] A pressure sensor and a temperature sensor, both of which are arranged on the cloth-clamped silicone tube communicated with the air inlet end of the test pump;

[0031] A flowmeter is provided on the cloth-clamped silica gel tube communicating with the air outlet end of the test pump.

[0032] Preferably, the valve group includes:

[0033] A first three-way valve, the left end opening is communicated with the cloth-clamped silica gel tube communicating with the inlet end of the test pump, and the top opening of the first three-way valve is communicated or closed with the air purification assembly;

[0034] A second three-way valve, the left end opening is communicated or closed with the right end opening of the first three-way valve, the right end opening of the second three-way valve is communicated with the pressure-relief tank, and the top opening of the second three-way valve is communicated with the external environment or communicated or closed with the gas supply mechanism.

[0035] Preferably, a plurality of quick-connect fittings II are communicated with the pressure-relief tank, the plurality of quick-connect fittings II are located on the side surface of the pressure-relief tank and are arranged at equal intervals along the length direction of the pressure-relief tank, a micro-valve is communicated with the bottom surface of the pressure-relief tank, and plugs are arranged at the opening ends of the pressure-relief tank;

[0036] The pressure-relief tank is fixedly installed in the bench;

[0037] One of the quick-connect fittings II is communicated with the right end opening of the second three-way valve, and the other quick-connect fitting II is connected to the cloth-clamped silica gel tube communicating with the air outlet end of the test pump;

[0038] The micro-valve is communicated with the gas supply mechanism or communicated with the external environment or closed.

[0039] Preferably, the gas supply mechanism includes:

[0040] A gas cylinder bracket;

[0041] A gas cylinder, fixedly installed in the gas cylinder bracket;

[0042] A gas cylinder pressure reducing valve, communicated with the air outlet of the gas cylinder, and the gas cylinder pressure reducing valve is communicated with the top opening of the second three-way valve or communicated with the micro-valve.

[0043] Preferably, the installation assembly includes:

[0044] A T-shaped screw, the nut is located in the T-shaped groove, and the threaded section of the T-shaped screw protrudes above the top surface of the bearing plate;

[0045] An angle code, fixedly installed on the threaded section of the T-shaped screw through a nut;

[0046] A bracket base, fixedly connected with the angle code, and the bracket base is vertically arranged;

[0047] The ferrule is fixedly installed at the top end of the bracket base, and the cloth clamping silicone tube, the first three-way valve, and the second three-way valve are respectively fixedly installed on different ferrules.

[0048] Preferably, threaded holes 1 are provided at the four corners of the top end of the bench, threaded holes 2 are provided at the four corners of the top surface of the bearing plate, and a plurality of the threaded holes 2 are arranged in one-to-one correspondence with a plurality of the threaded holes 1. The diameter of the threaded holes 2 is larger than that of the threaded holes 1. The threaded section of the lifting ring passes through the threaded holes 2 and is threadedly connected to the threaded holes 1.

[0049] Compared with the prior art, the present invention has the following advantages and technical effects:

[0050] In the present invention, the test pump is driven by a power mechanism. During the test, different gas media are introduced into the cloth clamping silicone tube and the pressure relief tank through different pipeline connection methods and different on-off methods of the valve group, and the introduction method of the gas medium changes according to the properties of the gas medium, so as to eliminate the problem of mutual mixing interference between different gas media. During the test process, data during the test is acquired by a first acquisition mechanism and a second acquisition mechanism, so that the performance and reliability of the test pump can be judged according to the acquired data;

[0051] The test bench of the present invention introduces gases with different properties into the roots pump for testing according to the properties of the gases transported by the roots pump, avoiding the problem that the actual test results may be deviated when the gas properties are quite different. At the same time, it effectively solves the problem of test result deviation caused by the mixing of gases with different properties during the test process. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts:

[0053] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0054] Figure 2 It is a schematic diagram of the structure of the support part in the present invention;

[0055] Figure 3 It is a schematic diagram of the structure of the valve group in the present invention;

[0056] Figure 4 It is a schematic diagram of the structure of the pressure relief tank in the present invention;

[0057] Figure 5Schematic diagram of connection during inflation in air medium test mode;

[0058] Figure 6 Schematic diagram of pipeline connection during inflation in low-density gas medium test mode;

[0059] Figure 7 Schematic diagram of pipeline connection during inflation in high-density gas medium test mode;

[0060] Figure 8 Schematic diagram of pipeline connection during long-term test;

[0061] Figure 9 Schematic diagram of signal conditioning of the present invention;

[0062] Figure 10 Schematic layout diagram of the first acquisition mechanism and the second acquisition mechanism in the present invention;

[0063] Among them, 1. Vibration transmitter; 2. Motor; 3. Bearing housing; 4. Coupling; 5. Torque meter; 6. Test pump; 7. Air filter; 8. Rubber hose with fabric; 9. Pressure sensor; 10. Temperature sensor; 11. Pressure reducing valve; 12. Flow meter; 13. Valve group; 14. Pipe group; 15. Cylinder pressure reducing valve; 16. Cylinder; 17. Cylinder bracket; 18. Pressure relief tank; 19. Heat exchanger; 20. Power supply rack; 21. DC power supply; 22. Controller; 23. Bench; 24. Power cord; 25. Bottom plate; 26. Reducing quick connector; 131. First three-way valve; 132. Quick connector; 133. Second three-way valve; 134. First quick-turning joint; 135. Ferrule joint; 141. Pipe one; 142. Pipe two; 143. Pipe three; 144. Pipe four; 145. Pipe five; 146. Pipe six; 147. Pipe seven; 148. Pipe eight; 181. Second quick-turning joint; 182. Micro valve; 183. Mounting hole; 184. Plug; 185. Threaded hole three; 231. Bench bracket; 232. Threaded hole one; 233. Bearing plate; 234. Threaded hole two; 235. T-shaped screw; 236. Angle code; 237. Bracket base; 238. Ferrule; 239. Hoisting ring; 2310. Adjustable floor feet; 2311. Positioning hole; 27. Circuit board; 271. DIN35 guide rail; 272. Power distribution box; 273. 24V power module; 274. Signal conversion and conditioning module; 28. Data acquisition card; 291. Host computer; 292. Mobile terminal of the host computer. Detailed implementation manners

[0064] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0065] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0066] Reference Figures 1 to 10 The present invention discloses a Roots pump test bench suitable for multiple models and multiple media, comprising:

[0067] Supporting part;

[0068] A test pump 6 is fixedly mounted on the support;

[0069] A power mechanism, fixedly mounted on the support portion and drivingly connected to the test pump 6;

[0070] A first acquisition mechanism is provided on the power mechanism and the power mechanism;

[0071] Two cloth-reinforced silicone tubes 8 are connected to the air inlet and outlet of the test pump 6 respectively;

[0072] Among them, the stainless steel pipes behind the two cloth-reinforced silicone tubes 8 are respectively provided with pressure reducing valves 11;

[0073] The second acquisition mechanism is arranged on the stainless steel tube behind the two cloth-reinforced silicone tubes 8;

[0074] The valve group 13 is arranged on the cloth-reinforced silicone tube 8 connected to the inlet end of the test pump 6, and the valve group 13 is located on the stainless steel tube behind the end of the cloth-reinforced silicone tube 8 away from the test pump 6;

[0075] The pressure relief tank 18 is arranged on the cloth-reinforced silicone tube 8 connected to the outlet end of the test pump 6, and the pressure relief tank 18 is located at one end of the cloth-reinforced silicone tube 8 away from the test pump 6;

[0076] In the air medium test mode, the valve group 13 is connected with the air purification component and the pressure relief tank 18;

[0077] The air purification component includes an air filter 7;

[0078] In the low-density gas medium test mode, when inflating, the valve group 13 is connected with the gas supply mechanism and the pressure relief tank 18, and the gas medium enters through the valve group 13 and is discharged through the pressure relief tank 18;

[0079] In the high-density gas medium test mode, during inflation, the pressure relief tank 18 is connected to the gas supply mechanism and the valve group 13, and the gas medium enters through the pressure relief tank 18 and is discharged through the valve group 13.

[0080] For a further optimized solution, the support part includes:

[0081] A bench 23, specifically including a bench bracket 231,

[0082] A plurality of adjustable feet 2310, which are arranged in an array at the bottom end of the bench bracket 231, and the adjustable feet 2310 are threadedly connected to the bench bracket 231; thus, the height of the adjustable feet 2310 can be adjusted, thereby adjusting the horizontal state of the bench bracket 231;

[0083] A bearing plate 233, which is fixedly installed on the top surface of the bench 23. A plurality of T-shaped grooves are provided on the top surface of the bearing plate 233. The T-shaped grooves are arranged along the length direction of the bearing plate 233, and a plurality of T-shaped grooves are equally spaced along the width direction of the bearing plate 233;

[0084] A plurality of mounting components are respectively arranged in the plurality of T-shaped grooves. The top ends of the mounting components penetrate through the T-shaped grooves, and the mounting components are used for mounting the cloth clamping silicone tube 8, the valve group 13, and the air purification component.

[0085] For a further optimized solution, the power mechanism includes:

[0086] A motor 2, which is fixedly installed on the top surface of the bearing plate 233;

[0087] A bearing seat 3, whose input end is coaxially and fixedly connected to the output shaft of the motor 2, and the output end of the bearing seat 3 is drivingly connected to the power end of the test pump 6.

[0088] Among them, the motor 2, the bearing seat 3, the torque meter 5, and the test pump 6 are all fixedly installed on the bottom plate 25, and the bottom plate 25 is fixedly installed on the top surface of the bearing plate 233;

[0089] The motor 2 is electrically connected to a controller 22 through a power cord 24, the controller 22 is electrically connected to a DC power supply 21, and the DC power supply 21 is fixedly installed on a power supply frame 20; the motor 2 is powered by the DC power supply 21;

[0090] For a further optimized solution, the first acquisition mechanism includes:

[0091] A vibration transmitter 1, which is fixedly installed on the bearing seat 3;

[0092] A torque meter 5, whose input end is coaxially and fixedly connected to the output end of the bearing seat 3 through a coupling 4, and the output end of the torque meter 5 is coaxially and fixedly connected to the power input end of the test pump 6.

[0093] For a further optimized solution, the second acquisition mechanism includes:

[0094] The pressure sensor 9 and the temperature sensor 10 are both arranged on the stainless steel pipe behind the cloth-reinforced silicone tube 8 that is communicated with the intake end of the test pump 6;

[0095] The flow meter 12 is arranged on the stainless steel pipe behind the cloth-reinforced silicone tube 8 that is communicated with the outlet end of the test pump 6.

[0096] The vibration and the input torque during the operation of the test pump 6 are measured by the vibration transmitter 1 and the torque meter 5, the gas temperature and pressure entering the test pump 6 are measured by the pressure sensor 9 and the temperature sensor 10, and the gas pressure at the outlet end of the test pump 6 is measured by the flow meter 12;

[0097] In a further optimized solution, the valve group 13 includes:

[0098] The first three-way valve 131, the left end opening of which is communicated with the stainless steel pipe behind the cloth-reinforced silicone tube 8 that is communicated with the inlet end of the test pump 6, and the top opening of the first three-way valve 131 is communicated or closed with the air purification assembly;

[0099] The second three-way valve 133, the left end opening of which is communicated or closed with the right end opening of the first three-way valve 131, the right end opening of the second three-way valve 133 is communicated with the pressure relief tank 18, and the top opening of the second three-way valve 133 is communicated with the external environment or with the gas supply mechanism or closed.

[0100] Quick connectors 132 are connected to the tops of both the first three-way valve 131 and the second three-way valve 133, facilitating the quick disassembly and assembly of various pipelines; the left end opening of the first three-way valve 131 is connected to the stainless steel pipe behind the cloth-reinforced silicone tube 8 through a ferrule joint 135, the right end opening of the first three-way valve 131 is connected to a rigid pipe through a ferrule joint 135, the rigid pipe is connected to the second three-way valve 133 through a ferrule joint 135, and the second three-way valve 133 is connected to the pipeline three 143 through a quick-connect fitting one 134;

[0101] In a further optimized solution, a plurality of quick-connect fittings two 181 are communicated with the pressure relief tank 18, the plurality of quick-connect fittings two 181 are located on the side surface of the pressure relief tank 18 and are equally spaced along the length direction of the pressure relief tank 18, a micro-valve 182 is communicated with the bottom surface of the pressure relief tank 18, and plugs 184 are arranged at the end openings of the pressure relief tank 18;

[0102] A support frame is fixedly connected to the bottom end of the pressure relief tank 18, an installation hole 183 is opened on the support frame, and a bolt passes through the installation hole 183 and is threadedly connected to a positioning hole 2311 opened on the inner bottom plate of the bench 23;

[0103] A threaded hole three 185 is opened at the top end of the pressure relief tank 18, and the threaded hole three 185 is used to connect components such as plugs, pressure gauges, and safety valves.

[0104] The pressure relief tank 18 is fixedly installed inside the bench 23;

[0105] One of the quick-connect fittings II 181 is communicated with the right-end opening of the second three-way valve 133, and the other quick-connect fitting II 181 is connected to the stainless steel pipe after the canvas-reinforced silicone tube 8 communicated with the air outlet end of the test pump 6;

[0106] The micro-valve 182 is communicated with the gas supply mechanism, or communicated with the external environment, or closed.

[0107] In a further optimized solution, the gas supply mechanism includes:

[0108] The gas cylinder bracket 17;

[0109] The gas cylinder 16 is fixedly installed inside the gas cylinder bracket 17;

[0110] The gas cylinder pressure reducing valve 15 is communicated with the air outlet of the gas cylinder 16, and the gas cylinder pressure reducing valve 15 is communicated with the top opening of the second three-way valve 133 or communicated with the micro-valve 182.

[0111] In a further optimized solution, the installation assembly includes:

[0112] The T-shaped screw 235, the nut is located in the T-shaped groove, and the threaded section of the T-shaped screw 235 protrudes above the top surface of the bearing plate 233;

[0113] The angle bracket 236 is fixedly installed on the threaded section of the T-shaped screw 235 through a nut;

[0114] The bracket base 237 is fixedly connected to the angle bracket 236, and the bracket base 237 is arranged vertically;

[0115] The ferrule 238 is fixedly installed at the top end of the bracket base 237, and the canvas-reinforced silicone tube 8, the first three-way valve 131, and the second three-way valve 133 are respectively fixedly installed on different ferrules 238.

[0116] In a further optimized solution, threaded holes I 232 are respectively opened at the four corners of the top end of the bench 23, threaded holes II 234 are respectively opened at the four corners of the top surface of the bearing plate 233, a plurality of threaded holes II 234 and a plurality of threaded holes I 232 are arranged in one-to-one correspondence, the diameter of the threaded hole II 234 is larger than the diameter of the threaded hole I 232, and the threaded section of the lifting ring 239 passes through the threaded hole II 234 and is threadedly connected to the threaded hole I 232.

[0117] In a further optimized solution, the second three-way valve 133 and the pressure relief tank 18, the pressure relief tank 18 and the gas cylinder 16, the first three-way valve 131 and the air purification assembly, and the second three-way valve 133 and the gas cylinder 16 are all communicated through the pipe group 14;

[0118] Specifically, the pipe group 14 includes pipe one 141, pipe two 142, pipe three 143, pipe four 144, pipe five 145, pipe six 146, pipe seven 147, and pipe eight 148;

[0119] The top opening of the first three-way valve 131 is connected to the air filter 7 through the pipe one 141. One of the quick-connect fittings two 181 of the pressure relief tank 18 is connected to the stainless steel pipe behind the cloth-clamped silica gel tube 8 through the pipe five 145. The other quick-connect fitting two 181 of the pressure relief tank 18 is connected to the right-end opening of the second three-way valve 133 through the pipe three 143. The air outlet of the gas cylinder pressure reducer 15 is connected to the micro-valve 182 or the pipe two 142 through the pipe four 144, and the pipe two 142 is connected to the top opening of the second three-way valve 133;

[0120] In the present invention, a circuit board 27, a DIN35 rail 271, a power distribution box 272, a 24V power module 273, a signal conversion and conditioning module 274, a data acquisition card 28, a host computer 291, and a host computer mobile terminal 292 are also provided;

[0121] The power distribution box 272 is electrically connected to multiple 24V power modules 273 and is fixedly installed on the circuit board 27 through the DIN35 rail 271. The power distribution box 272, the 24V power module 273, and the signal conversion and conditioning module 274 are all integrated on the circuit board 27, reducing the use of wires and avoiding mess;

[0122] The 24V power module 273 supplies power to the vibration transmitter 1, the pressure sensor 9, the temperature sensor 10, the torque meter 5, the pressure reducer 11, and the flow meter 12. The signal conversion and conditioning module 274 conditions and converts the signals of the vibration transmitter 1, the pressure sensor 9, the temperature sensor 10, the torque meter 5, the pressure reducer 11, and the flow meter 12. The data acquisition card 28 collects the data and transmits the data to the host computer 291 and the host computer mobile terminal 292. The opening and closing degree of the pressure reducer 11 is controlled through the host computer 291 / host computer mobile terminal 292, and the operating conditions of the test pump 6 are regulated through the controller 22.

[0123] When the device of the present invention is working, it is divided into multiple test modes:

[0124] Air medium test mode:

[0125] In this mode, the top opening of the first three-way valve 131 is connected to the air filter 7 through the first pipe 141, the right-end opening of the first three-way valve 131 is closed, and the left-end opening is connected to the test pump 6. The top opening of the second three-way valve 133 is connected to the second pipe 142. The left-end opening of the second three-way valve 133 is closed, and the right-end opening of the second three-way valve 133 is connected to the pressure-relief tank 18 through the third pipe 143 and the second quick-connect fitting 181. The pressure-relief tank 18 is connected to the test pump 6 through the fifth pipe 145, and the micro-valve 182 is closed.

[0126] The motor 2 rotates to drive the test pump 6 to move. Air enters the top opening of the first three-way valve 131 through the air filter 7, then enters the test pump 6. Under the action of the test pump 6, the air enters the pressure-relief tank 18 through the fifth pipe 145, then enters the right-end opening of the second three-way valve 133 through the third pipe 143, and finally is discharged through the second pipe 142.

[0127] Low-density gas medium test mode:

[0128] The low-density gas medium refers to a gas medium with a density less than that of air.

[0129] In this mode, the top opening of the first three-way valve 131 is closed, all three openings of the second three-way valve 133 are opened, the micro-valve 182 is opened. The top opening of the second three-way valve 133 is connected to the second pipe 142. The second pipe 142 is connected to the fourth pipe 144 through the reducing quick-connect fitting 26. The fourth pipe 144 is connected to the gas cylinder 16 through the gas cylinder pressure-reducing valve 15. The right-end opening of the second three-way valve 133 is connected to the pressure-relief tank 18 through the third pipe 143 and the second quick-connect fitting 181. The left-end opening of the second three-way valve 133 is connected to the right-end opening of the first three-way valve 131. The left-end opening of the first three-way valve 131 is connected to the test pump 6. The test pump 6 is connected to the pressure-relief tank 18 through the fifth pipe 145, and the micro-valve 182 is opened.

[0130] During inflation, since the density of the medium is less than that of air, the medium is introduced from above and the air is discharged from below. Specifically, the medium enters the second three-way valve 133 through the gas cylinder pressure-reducing valve 15, the fourth pipe 144, and the second pipe 142, then passes through the test pump 6, and the air is discharged to the pressure-relief tank 18 and discharged through the micro-valve 182.

[0131] During testing, the top opening of the second three-way valve 133 is closed, the motor 2 rotates to drive the test pump 6 to move, so that the gas circulates for testing.

[0132] High-density gas medium test mode:

[0133] The high-density gas medium refers to a gas medium with a density greater than that of air.

[0134] In this mode, the micro-valve 182 is connected to the gas cylinder pressure reducing valve 15 through Pipeline Four 144. The pressure relief tank 18 is connected to Pipeline Three 143 and Pipeline Five 145 respectively through two quick-connect joints Two 181. Pipeline Five 145 is connected to the air outlet of the test pump 6. Pipeline Three 143 is connected to the right-end opening of the second three-way valve 133. The top opening of the second three-way valve 133 is connected to Pipeline Two 142. All three openings of the second three-way valve 133 are connected. The left-end opening of the second three-way valve 133 is connected to the first three-way valve 131. The left-end opening of the first three-way valve 131 is connected to the test pump 6. The top opening of the first three-way valve 131 is closed.

[0135] During inflation, since the density of the medium is greater than, the medium enters through the bottom and is discharged from the top. Specifically, the medium enters the pressure relief tank 18 through the micro-valve 182, and the air is discharged from Pipeline Two 142 after passing through Pipeline Five 145 and Pipeline Three 143.

[0136] During testing, close the top opening of the second three-way valve 133. The motor 2 rotates to drive the test pump 6 to move, so that the gas circulates for testing.

[0137] Long-term testing:

[0138] As the testing time extends, the temperature of the gas gradually rises. At this time, the top openings of the first three-way valve 131 and the second three-way valve 133 are closed, and the top opening of the first three-way valve 131 is connected to the top opening of the second three-way valve 133 through Pipeline Eight 148. The right-end opening of the second three-way valve 133 is connected to the pressure relief tank 18 through Pipeline Three 143 and quick-connect joint Two 181. The left-end opening of the second three-way valve 133 is connected to the right-end opening of the first three-way valve 131. The left-end opening of the first three-way valve 131 is connected to the air inlet of the test pump 6. The micro-valve 182 is connected to the gas cylinder pressure reducing valve 15 through Pipeline Four 144. The pressure relief tank 18 is connected to the gas outlet of the heat exchanger 19 through quick-connect joint Two 181 and Pipeline Six 146. The gas inlet of the heat exchanger 19 is connected to the air outlet of the test pump 6. The two heat exchange ports of the heat exchanger 19 are respectively connected to the external heat exchange medium.

[0139] In this state, during the circulation process of the medium, it continuously exchanges heat with the flowing heat exchange medium in the heat exchanger 19 to prevent the medium from overheating and affecting the test results.

[0140] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0141] The embodiments described above are only for describing the preferred mode of the present invention, and do not limit the scope of the present invention. Without departing from the design spirit of the present invention, various deformations and improvements made by those of ordinary skill in the art to the technical solution of the present invention shall fall within the protection scope determined by the claims of the present invention.

Claims

1. A Roots pump test bench applicable to multiple machine models and multiple media, characterized in that, Comprising: A support part; A test pump (6), fixedly installed on the support part; A power mechanism, fixedly installed on the support part and in transmission connection with the test pump (6); A first acquisition mechanism, arranged on the power mechanism and the power mechanism; Two cloth-clamped silicone hoses (8), respectively communicated with the air inlet end and the air outlet end of the test pump (6); A second acquisition mechanism, arranged on the two cloth-clamped silicone hoses (8); A valve group (13), arranged on the cloth-clamped silicone hose (8) communicated with the inlet end of the test pump (6), and the valve group (13) is located at one end of the cloth-clamped silicone hose (8) far away from the test pump (6); A pressure relief tank (18), arranged on the cloth-clamped silicone hose (8) communicated with the outlet end of the test pump (6), and the pressure relief tank (18) is located at one end of the cloth-clamped silicone hose (8) far away from the test pump (6); In the air medium test mode, the valve group (13) is communicated with the air purification component and the pressure relief tank (18); In the low-density gas medium test mode, during inflation, the valve group (13) is communicated with the gas supply mechanism and the pressure relief tank (18), and the gas medium enters through the valve group (13) and is discharged through the pressure relief tank (18); In the high-density gas medium test mode, during inflation, the pressure relief tank (18) is communicated with the gas supply mechanism and the valve group (13), and the gas medium enters through the pressure relief tank (18) and is discharged through the valve group (13).

2. The Roots pump test bench applicable to multiple machine models and multiple media according to claim 1, characterized in that, The support part includes: A bench (23); A plurality of adjustable floor feet (2310), arrayed at the bottom end of the bench (23), and the adjustable floor feet (2310) are in threaded connection with the bench (23); A bearing plate (233), fixedly installed on the top surface of the bench (23), and a plurality of T-shaped grooves are formed on the top surface of the bearing plate (233), the T-shaped grooves are arranged along the length direction of the bearing plate (233), and the plurality of T-shaped grooves are equally spaced along the width direction of the bearing plate (233); A plurality of installation components, respectively arranged in the plurality of T-shaped grooves, the top ends of the installation components penetrate out of the T-shaped grooves, and the installation components are used for installing the cloth-clamped silicone hose (8), the valve group (13) and the air purification component.

3. The Roots pump test bench applicable to multiple machine models and multiple media according to claim 2, characterized in that, The power mechanism includes: A motor (2), fixedly installed on the top surface of the bearing plate (233); A bearing seat (3), the input end of which is coaxially and fixedly connected with the output shaft of the motor (2), and the output end of the bearing seat (3) is in transmission connection with the power end of the test pump (6).

4. The Roots pump test bench applicable to multiple machine models and multiple media according to claim 3, characterized in that The first acquisition mechanism includes: A vibration transmitter (1), fixedly installed on the bearing seat (3); A torque meter (5), the input end of which is coaxially and fixedly connected with the output end of the bearing seat (3) through a coupling (4), and the output end of the torque meter (5) is coaxially and fixedly connected with the power input end of the test pump (6).

5. The Roots pump test bench applicable to multiple machine models and multiple media according to claim 1, characterized in that, The second acquisition mechanism includes: A pressure sensor (9) and a temperature sensor (10), both arranged on the cloth-clamped silicone hose (8) communicated with the air inlet end of the test pump (6); A flowmeter (12) is provided on the cloth-lined silicone tube (8) communicating with the air outlet end of the test pump (6).

6. The Roots pump test bench applicable to multiple machine models and multiple media according to claim 2, characterized in that, The valve group (13) includes: A first three-way valve (131) with its left end opening communicating with the cloth-lined silicone tube (8) communicating with the inlet end of the test pump (6), and the top opening of the first three-way valve (131) communicating or closing with the air purification assembly; A second three-way valve (133) with its left end opening communicating or closing with the right end opening of the first three-way valve (131), the right end opening of the second three-way valve (133) communicating with the pressure-relief tank (18), and the top opening of the second three-way valve (133) communicating with the external environment or communicating or closing with the gas supply mechanism.

7. The Roots pump test bench applicable to multiple machine models and multiple media according to claim 6, characterized in that, A plurality of quick-connect fittings II (181) are connected to the pressure-relief tank (18). The plurality of quick-connect fittings II (181) are located on the side of the pressure-relief tank (18) and are equally spaced along the length direction of the pressure-relief tank (18). A micro-valve (182) is connected to the bottom surface of the pressure-relief tank (18), and plugs (184) are provided at the end openings of the pressure-relief tank (18); The pressure-relief tank (18) is fixedly installed in the bench (23); One of the quick-connect fittings II (181) communicates with the right end opening of the second three-way valve (133), and the other quick-connect fitting II (181) is connected to the cloth-lined silicone tube (8) communicating with the air outlet end of the test pump (6); The micro-valve (182) communicates with the gas supply mechanism or communicates with the external environment or closes.

8. A Roots pump test bench applicable to multiple machine models and multiple media according to claim 7, characterized in that, The gas supply mechanism includes: A gas cylinder bracket (17); A gas cylinder (16) fixedly installed in the gas cylinder bracket (17); A gas cylinder pressure reducing valve (15) connected to the air outlet of the gas cylinder (16), and the gas cylinder pressure reducing valve (15) communicates with the top opening of the second three-way valve (133) or communicates with the micro-valve (182).

9. The Roots pump test bench applicable to multiple machine models and multiple media according to claim 6, characterized in that, The installation assembly includes: A T-shaped screw (235) with its nut located in the T-shaped groove, and the threaded section of the T-shaped screw (235) protruding above the top surface of the carrier plate (233); An angle code (236) fixedly installed on the threaded section of the T-shaped screw (235) through a nut; A bracket base (237) fixedly connected to the angle code (236), and the bracket base (237) is vertically arranged; A ferrule (238) fixedly installed at the top end of the bracket base (237), and the cloth-lined silicone tube (8), the first three-way valve (131), and the second three-way valve (133) are respectively fixedly installed on different ferrules (238).

10. A Roots pump test bench applicable to multiple machine models and multiple media according to claim 2, characterized in that, Threaded holes one (232) are provided at the four corners of the top end of the bench (23), threaded holes two (234) are provided at the four corners of the top surface of the bearing plate (233), and the multiple threaded holes two (234) are arranged in one-to-one correspondence with the multiple threaded holes one (232). The diameter of the threaded hole two (234) is larger than the diameter of the threaded hole one (232). The threaded section of the lifting ring (239) passes through the threaded hole two (234) and is threadedly connected to the threaded hole one (232).

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