A roots pump test bench suitable for multiple models and multiple media

Abstract

The present application belongs to the technical field of Roots pump testing, and particularly relates to a Roots pump test bench suitable for multiple models and multiple media. In the present application, a power mechanism drives a test pump to move. During testing, different pipeline communication modes and different on-off modes of valve groups are used to introduce different gas media into the cloth-silica gel pipe and the surge tank. The introduction mode of the gas media changes according to the properties of the gas media, thereby eliminating the problem of mutual mixing and interference between different gas media. During the testing process, a first acquisition mechanism and a second acquisition mechanism are used to acquire data during the testing process, so that the performance and reliability of the test pump can be judged according to the acquired data. The present application introduces different properties of gas into the Roots pump for testing, thereby avoiding the problem that when the properties of the gas are greatly different, the actual test results may be biased. At the same time, the present application effectively solves the problem of test result deviation caused by the mixing of different properties of gas during the testing process.

Description

Technical Field

[0001] This invention belongs to the field of Roots pump testing technology, and in particular relates to a Roots pump test bench suitable for multiple models and media. Background Technology

[0002] Roots pumps are widely used in petrochemical, semiconductor equipment, shipbuilding, and fuel cell hydrogen recirculation systems for new energy vehicles. With the advancement of energy conservation, emission reduction, and intelligent development, the requirements for equipment fault diagnosis, vibration signal acquisition, and performance testing are constantly increasing, especially in on-board fuel cell hydrogen recirculation systems, where the performance and reliability requirements for Roots pumps are even more stringent.

[0003] Because Roots pumps have a wide range of applications, they transport a diverse variety of gases. Currently, most tests use air as the medium to represent different gases, and the results tend to be similar to some extent. However, when the gas properties differ significantly, the actual test results may deviate significantly. Summary of the Invention

[0004] The purpose of this invention is to provide a Roots pump test bench suitable for multiple models and media, in order to solve the above-mentioned problems.

[0005] To achieve the above objectives, the present invention provides the following solution:

[0006] A test bench for Roots pumps suitable for multiple models and media includes:

[0007] Support section;

[0008] The test pump is fixedly mounted on the support.

[0009] A power mechanism is fixedly installed on the support and is connected to the test pump via a transmission connection.

[0010] A first acquisition mechanism is disposed on the power mechanism and the power mechanism;

[0011] Two fabric-reinforced silicone tubes are connected to the air inlet and air outlet of the test pump, respectively.

[0012] The second acquisition mechanism is disposed on the two fabric-reinforced silicone tubes;

[0013] A valve assembly is installed on the fabric-reinforced silicone tube that communicates with the inlet end of the test pump, and the valve assembly is located at the end of the fabric-reinforced silicone tube away from the test pump.

[0014] A pressure relief tank is disposed on the fabric-reinforced silicone tube that communicates with the outlet end of the test pump, and the pressure relief tank is located at the end of the fabric-reinforced silicone tube away from the test pump.

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

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

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

[0018] Preferably, the support portion includes:

[0019] stand;

[0020] Multiple adjustable feet are arrayed at the bottom end of the platform, and the adjustable feet are threadedly connected to the platform.

[0021] A support plate is fixedly installed on the top surface of the frame. The top surface of the support plate has multiple T-slots. The T-slots are arranged along the length direction of the support plate, and the multiple T-slots are evenly spaced along the width direction of the support plate.

[0022] Multiple mounting components are respectively disposed in multiple T-slots, with the top end of each mounting component extending out of the T-slot. The mounting components are used to install the fabric-reinforced silicone tube, the valve assembly, and the air purification component.

[0023] Preferably, the power mechanism includes:

[0024] The motor is fixedly mounted on the top surface of the support plate;

[0025] The bearing housing has its input end coaxially fixed to the output shaft of the motor, and its output end is connected to the power end of the test pump via a transmission connection.

[0026] Preferably, the first acquiring mechanism includes:

[0027] The vibration transmitter is fixedly mounted on the bearing housing;

[0028] The torque meter has its input end coaxially fixed to the output end of the bearing housing via a coupling, and its output end is coaxially fixed to the power input end of the test pump.

[0029] Preferably, the second obtaining mechanism includes:

[0030] Both the pressure sensor and the temperature sensor are mounted on the fabric-reinforced silicone tube that is connected to the air inlet of the test pump.

[0031] A flow meter is installed on the fabric-reinforced silicone tube that is connected to the outlet of the test pump.

[0032] Preferably, the valve assembly includes:

[0033] The first three-way valve has its left end opening connected to the fabric-reinforced silicone tube that is connected to the inlet end of the test pump, and its top end opening is connected to or closed with the air purification component.

[0034] The second three-way valve has its left end opening connected to or closed with the right end opening of the first three-way valve, its right end opening connected to the pressure relief tank, and its top end opening connected to or closed with the external environment or the gas supply mechanism.

[0035] Preferably, the pressure-reducing tank is connected to a plurality of quick-connect fittings II, which are located on the side of the pressure-reducing tank and are equally spaced along the length of the pressure-reducing tank. The bottom surface of the pressure-reducing tank is connected to a micro valve, and a plug is provided at each end opening of the pressure-reducing tank.

[0036] The pressure-reducing tank is fixedly installed inside the frame;

[0037] One of the quick-connect fittings is connected to the right end opening of the second three-way valve, and the other quick-connect fitting is connected to the fabric-reinforced silicone tube that is connected to the air outlet of the test pump.

[0038] The micro valve is connected to the gas supply mechanism or to the external environment, or it can be closed.

[0039] Preferably, the gas supply mechanism includes:

[0040] Gas cylinder support;

[0041] The gas cylinder is fixedly installed inside the gas cylinder bracket;

[0042] A gas cylinder pressure reducing valve is connected to the gas outlet of the gas cylinder. The gas cylinder pressure reducing valve is connected to the top opening of the second three-way valve or to the micro valve.

[0043] Preferably, the mounting components include:

[0044] T-shaped screws, with the nut located in the T-slot, and the threaded section of the T-shaped screw protruding above the top surface of the support plate;

[0045] Angle brackets are fixedly installed on the threaded section of the T-screw by means of nuts;

[0046] A bracket base is fixedly connected to the corner bracket, and the bracket base is vertically arranged.

[0047] The ferrule is fixedly installed on the top of the bracket base, and the fabric-reinforced 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 of the platform, and threaded holes 2 are provided at the four corners of the top surface of the bearing plate. Multiple threaded holes 2 are provided in a one-to-one correspondence with multiple threaded holes 1. The diameter of the threaded hole 2 is larger than the diameter of the threaded hole 1. The threaded section of the lifting ring passes through the threaded hole 2 and is threadedly connected to the threaded hole 1.

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

[0050] In this invention, a power mechanism drives the test pump to move. During testing, different gaseous media are introduced into the silicone-reinforced tubing and the pressure-reducing tank through different pipeline connection methods and different valve group on / off methods. The gas medium introduction method changes according to the properties of the gas medium, thereby eliminating the problem of mutual mixing and interference between different gaseous media. During the test, the first acquisition mechanism and the second acquisition mechanism acquire the data during the test, so that the performance and reliability of the test pump can be judged based on the acquired data.

[0051] The test bench of this invention, based on the properties of the gas transported by the Roots pump, allows gases of different properties to be introduced into the Roots pump for testing, thus avoiding the problem of potential deviations in actual test results when the gas properties differ significantly. At the same time, it effectively solves the problem of test result deviations caused by the mixing of gases of different properties during the testing process. Attached Figure Description

[0052] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly described below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

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

[0054] Figure 2 This is a schematic diagram of the support portion in this invention;

[0055] Figure 3 This is a schematic diagram of the valve assembly in this invention;

[0056] Figure 4 This is a schematic diagram of the pressure-reducing tank in this invention;

[0057] Figure 5This is a connection diagram for inflation in air medium test mode;

[0058] Figure 6 This is a schematic diagram of the pipeline connection during inflation in a low-density gas medium test mode.

[0059] Figure 7 This is a schematic diagram of the pipeline connection during inflation in the high-density gas medium test mode.

[0060] Figure 8 This is a schematic diagram of the piping connections during long-term testing;

[0061] Figure 9 This is a schematic diagram of signal conditioning according to the present invention;

[0062] Figure 10 This is a schematic diagram showing the arrangement of the first and second acquisition mechanisms in this invention;

[0063] The components include: 1. Vibration transmitter; 2. Motor; 3. Bearing housing; 4. Coupling; 5. Torque meter; 6. Test pump; 7. Air filter; 8. Fabric-reinforced silicone tubing; 9. Pressure sensor; 10. Temperature sensor; 11. Pressure reducing valve; 12. Flow meter; 13. Valve assembly; 14. Pipe assembly; 15. Gas cylinder pressure reducing valve; 16. Gas cylinder; 17. Gas cylinder bracket; 18. Pressure easing tank; 19. Heat exchanger; 20. Power supply frame; 21. DC power supply; 22. Controller; 23. Stand; 24. Power cord; 25. Base plate; 26. Reducing quick-connect fitting; 131. First three-way valve; 132. Quick-connect fitting; 133. Second three-way valve; 134. Quick-tight fitting one; 135. Compression fitting; 141. Pipe one; 142. Pipe two; 143. Pipe three ; 144. Pipe 4; 145. Pipe 5; 146. Pipe 6; 147. Pipe 7; 148. Pipe 8; 181. Quick-connect coupling 2; 182. Miniature valve; 183. Mounting hole; 184. Plug; 185. Threaded hole 3; 231. Stand bracket; 232. Threaded hole 1; 233. Bearing plate; 234. Threaded hole 2; 235. T-screw; 236. Angle bracket; 237. Bracket base; 238. Compression sleeve; 239. Lifting ring; 2310. Adjustable foot; 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. Host computer mobile terminal. Detailed Implementation

[0064] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0065] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

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

[0067] Support section;

[0068] Test pump 6 is fixedly mounted on the support.

[0069] The power mechanism is fixedly mounted on the support and is connected to the test pump 6 via a transmission.

[0070] The first acquisition mechanism is installed on the power mechanism and the power mechanism;

[0071] Two silicone tubes 8 are connected to the air inlet and air outlet of the test pump 6, respectively.

[0072] Among them, pressure reducing valves 11 are respectively installed on the stainless steel pipes after the two fabric-reinforced silicone tubes 8;

[0073] The second acquisition mechanism is set on the stainless steel tube after the two fabric-reinforced silicone tubes 8;

[0074] Valve assembly 13 is installed on the fabric-reinforced silicone tube 8 that is connected to the inlet end of the test pump 6. Valve assembly 13 is located on the stainless steel tube behind the end of the fabric-reinforced silicone tube 8 that is away from the test pump 6.

[0075] The pressure relief tank 18 is installed on the fabric-reinforced silicone tube 8, which is connected to the outlet end of the test pump 6. The pressure relief tank 18 is located at the end of the fabric-reinforced silicone tube 8 that is away from the test pump 6.

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

[0077] The air purification components include an air filter 7;

[0078] In the low-density gas medium test mode, when the gas is being filled, the valve group 13 is connected to the gas supply mechanism and the pressure tank 18, and the gas medium enters through the valve group 13 and is discharged through the pressure 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 exits through the valve group 13.

[0080] Further optimization of the plan, the support department includes:

[0081] The stand 23 specifically includes the stand support 231.

[0082] Multiple adjustable feet 2310 are arrayed at the bottom of the platform support 231, and the adjustable feet 2310 are threadedly connected to the platform support 231; thereby making the height of the adjustable feet 2310 adjustable, thereby adjusting the horizontal state of the platform support 231.

[0083] The support plate 233 is fixedly installed on the top surface of the frame 23. Multiple T-slots are opened on the top surface of the support plate 233. The T-slots are arranged along the length direction of the support plate 233 and the multiple T-slots are evenly spaced along the width direction of the support plate 233.

[0084] Multiple mounting components are respectively set in multiple T-slots, with the top of the mounting components extending out of the T-slots. The mounting components are used to install the fabric-reinforced silicone tube 8, the valve group 13, and the air purification components.

[0085] The scheme has been further optimized, and the power mechanism includes:

[0086] Motor 2 is fixedly mounted on the top surface of the support plate 233;

[0087] The bearing housing 3 has its input end coaxially fixed to the output shaft of the motor 2, and its output end is connected to the power end of the test pump 6.

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

[0089] The motor 2 is electrically connected to the controller 22 via the power cord 24. The controller 22 is electrically connected to the DC power supply 21, which is fixedly mounted on the power supply frame 20. The motor 2 is powered by the DC power supply 21.

[0090] The plan has been further optimized, and the primary acquisition agencies include:

[0091] Vibration transmitter 1 is fixedly mounted on bearing housing 3;

[0092] The input end of the torque meter 5 is coaxially fixed to the output end of the bearing housing 3 via a coupling 4, and the output end of the torque meter 5 is coaxially fixed to the power input end of the test pump 6.

[0093] The plan has been further optimized, and the second acquisition agency includes:

[0094] Pressure sensor 9 and temperature sensor 10 are both mounted on the stainless steel tube after the fabric-reinforced silicone tube 8, which is connected to the air inlet of test pump 6.

[0095] The flow meter 12 is installed on the stainless steel tube after the silicone tube 8, which is connected to the outlet of the test pump 6.

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

[0097] Further optimization of the scheme, valve group 13 includes:

[0098] The first three-way valve 131 has its left end opening connected to the stainless steel tube behind the silicone tube 8 that is connected to the inlet end of the test pump 6, and its top end opening is connected to or closed with the air purification component.

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

[0100] The top of both the first three-way valve 131 and the second three-way valve 133 are connected to quick-connect fittings 132 for easy assembly and disassembly of various pipelines; the left opening of the first three-way valve 131 is connected to the stainless steel pipe behind the fabric-reinforced silicone tube 8 through a compression fitting 135, and the right opening of the first three-way valve 131 is connected to a rigid pipe through a compression fitting 135. The rigid pipe is connected to the second three-way valve 133 through a compression fitting 135, and the second three-way valve 133 is connected to the pipe 143 through a quick-connect fitting 134.

[0101] Further optimization of the scheme: multiple quick-connect fittings 181 are connected to the pressure tank 18. The multiple quick-connect fittings 181 are located on the side of the pressure tank 18 and are equally spaced along the length of the pressure tank 18. A micro valve 182 is connected to the bottom surface of the pressure tank 18. A plug 184 is provided at the end opening of the pressure tank 18.

[0102] The bottom end of the pressure relief tank 18 is fixedly connected to a support frame, and the support frame has a mounting hole 183. After the bolt passes through the mounting hole 183, it is threaded onto the positioning hole 2311 opened on the inner bottom plate of the platform 23.

[0103] The top of the pressure relief tank 18 is provided with a threaded hole 3 185, which is used to connect components such as plugs, pressure gauges, and safety valves.

[0104] Pressure relief tank 18 is fixedly installed inside the frame 23;

[0105] One of the quick-connect fittings 181 is connected to the right end opening of the second three-way valve 133, and the other quick-connect fitting 181 is connected to the stainless steel tube behind the fabric-reinforced silicone tube 8, which is connected to the air outlet of the test pump 6.

[0106] Miniature valve 182 is connected to the gas supply mechanism or to the external environment, or it can be closed.

[0107] Further optimization of the plan, the gas supply providers include:

[0108] Cylinder support 17;

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

[0110] The gas cylinder pressure reducing valve 15 is connected to the gas outlet of the gas cylinder 16. The gas cylinder pressure reducing valve 15 is connected to the top opening of the second three-way valve 133 or to the miniature valve 182.

[0111] The solution has been further optimized, and the installation components include:

[0112] T-screw 235, the nut is located in the T-slot, and the threaded section of T-screw 235 is higher than the top surface of the bearing plate 233;

[0113] Angle bracket 236 is fixedly installed on the threaded section of T-screw 235 by a nut;

[0114] The bracket base 237 is fixedly connected to the corner bracket 236, and the bracket base 237 is set vertically.

[0115] The ferrule 238 is fixedly installed on the top of the bracket base 237, and the fabric-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 design, threaded holes 232 are provided at the four corners of the top of the platform 23, and threaded holes 234 are provided at the four corners of the top surface of the bearing plate 233. The multiple threaded holes 234 are set one-to-one with the multiple threaded holes 232. The diameter of the threaded holes 234 is larger than the diameter of the threaded holes 232. The threaded section of the lifting ring 239 passes through the threaded holes 234 and is threadedly connected to the threaded holes 232.

[0117] The scheme is further optimized so that the second three-way valve 133 is connected to the pressure tank 18, the pressure tank 18 is connected to the gas cylinder 16, the first three-way valve 131 is connected to the air purification component, and the second three-way valve 133 is connected to the gas cylinder 16 through the pipe assembly 14.

[0118] Specifically, pipe group 14 includes pipe 141, pipe 2 142, pipe 3 143, pipe 4 144, pipe 5 145, pipe 6 146, pipe 7 147, and pipe 8 148.

[0119] The top opening of the first three-way valve 131 is connected to the air filter 7 through pipe 141. One of the quick-connect fittings 181 of the pressure relief tank 18 is connected to the stainless steel pipe behind the silicone tube 8 through pipe 5 145. The other quick-connect fitting 181 of the pressure relief tank 18 is connected to the right end opening of the second three-way valve 133 through pipe 3 143. The outlet of the gas cylinder pressure reducing valve 15 is connected to the micro valve 182 or pipe 2 142 through pipe 4 144. Pipe 2 142 is connected to the top opening of the second three-way valve 133.

[0120] The present invention also includes a circuit board 27, a DIN35 guide 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.

[0121] The power distribution box 272 is electrically connected to multiple 24V power modules 273 and is fixedly mounted on the circuit board 27 via DIN35 rails 271. The power distribution box 272, 24V power modules 273, and signal conversion and conditioning module 274 are all integrated on the circuit board 27, reducing the use of wiring and avoiding clutter.

[0122] The vibration transmitter 1, pressure sensor 9, temperature sensor 10, torque meter 5, pressure reducing valve 11, and flow meter 12 are powered by a 24V power supply module 273. The signals from the vibration transmitter 1, pressure sensor 9, temperature sensor 10, torque meter 5, pressure reducing valve 11, and flow meter 12 are conditioned and converted by a signal conversion and conditioning module 274. Data is acquired by a data acquisition card 28 and transmitted to a host computer 291 and a host computer mobile terminal 292. The host computer 291 / host computer mobile terminal 292 controls the opening and closing degree of the pressure reducing valve 11. The controller 22 regulates the operating conditions of the test pump 6.

[0123] The device of the present invention operates in 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 pipe 141, the right opening of the first three-way valve 131 is closed, and the left opening is connected to the test pump 6. The top opening of the second three-way valve 133 is connected to pipe 2142, the left opening of the second three-way valve 133 is closed, and the right opening of the second three-way valve 133 is connected to the pressure tank 18 through pipe 3143 and quick-connect fitting 2181. The pressure tank 18 is connected to the test pump 6 through pipe 5145, and the micro valve 182 is closed.

[0126] The rotation of motor 2 drives the test pump 6 to move. Air enters the top opening of the first three-way valve 131 through the air filter 7, and then enters the test pump 6. Under the action of the test pump 6, the air enters the pressure tank 18 through pipe five 145, then enters the right opening of the second three-way valve 133 through pipe three 143, and finally exits through pipe two 142.

[0127] Low-density gas medium test mode:

[0128] Low-density gaseous media refers to gaseous media 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 open, the micro valve 182 is open, the top opening of the second three-way valve 133 is connected to pipe two 142, pipe two 142 is connected to pipe four 144 through reducing quick connector 26, pipe four 144 is connected to gas cylinder 16 through gas cylinder pressure reducing valve 15, the right end opening of the second three-way valve 133 is connected to pressure tank 18 through pipe three 143 and quick connector 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 test pump 6, test pump 6 is connected to pressure tank 18 through pipe five 145, and the micro valve 182 is open.

[0130] When inflating, because the density of the medium is less than that of air, the medium is introduced from the top and the air is discharged from the bottom. Specifically, the medium enters the second three-way valve 133 through the gas cylinder pressure reducing valve 15, pipe four 144, and pipe two 142, and then passes through the test pump 6 to discharge the air to the pressure tank 18 and discharge it through the micro valve 182.

[0131] During testing, the top opening of the second three-way valve 133 is closed, and the motor 2 rotates to drive the test pump 6 to circulate the gas and perform the test.

[0132] High-density gas medium test mode:

[0133] 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 pipe 4 144. The pressure relief tank 18 is connected to pipe 3 143 and pipe 5 145 through two quick-connect fittings 2 181 respectively. Pipe 5 145 is connected to the outlet of the test pump 6. Pipe 3 143 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 pipe 2 142. 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, because the density of the medium is greater than that of the air, the medium enters through the bottom and exits through the top. Specifically, the medium enters the pressure tank 18 through the micro valve 182, and the air is discharged through the pipe 145 and the pipe 143 and then through the pipe 142.

[0136] During testing, the top opening of the second three-way valve 133 is closed, and the motor 2 rotates to drive the test pump 6 to circulate the gas and perform the test.

[0137] Long-term testing:

[0138] As the test time increases, the gas temperature 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 openings of the first three-way valve 131 and the second three-way valve 133 are connected through pipe 8 148. The right end opening of the second three-way valve 133 is connected to the pressure tank 18 through pipe 3 143 and quick-connect fitting 2 181. 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 pipe 4 144. The pressure tank 18 is connected to the gas outlet of the heat exchanger 19 through quick-connect fitting 2 181 and pipe 6 146. 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 connected to the external heat exchange medium respectively.

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

[0140] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0141] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A test bench for Roots pumps suitable for multiple models and media, characterized in that, include: Support section; The test pump (6) is fixedly installed on the support. The power mechanism is fixedly installed on the support and is connected to the test pump (6) in a transmission manner; A first acquisition mechanism is disposed on the power mechanism and the power mechanism; Two fabric-reinforced silicone tubes (8) are respectively connected to the air inlet and air outlet of the test pump (6); The second acquisition mechanism is set on the two fabric-reinforced silicone tubes (8); Valve assembly (13) is provided on the fabric-reinforced silicone tube (8) which is connected to the inlet end of the test pump (6), and the valve assembly (13) is located at the end of the fabric-reinforced silicone tube (8) away from the test pump (6). A pressure relief tank (18) is provided on the fabric-reinforced silicone tube (8) which is connected to the outlet end of the test pump (6). The pressure relief tank (18) is located at the end of the fabric-reinforced silicone tube (8) away from the test pump (6). In the air medium test mode, the valve group (13) is connected to the air purification component and the pressure relief tank (18); In the low-density gas medium test mode, when the gas is being filled, the valve group (13) is connected to 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 connected to the gas supply mechanism and the valve group (13), and the gas medium enters through the pressure relief tank (18) and exits through the valve group (13); The support portion includes: Stand (23); Multiple adjustable feet (2310) are arranged in an array at the bottom end of the platform (23), and the adjustable feet (2310) are threadedly connected to the platform (23); A support plate (233) is fixedly installed on the top surface of the frame (23). The top surface of the support plate (233) has multiple T-shaped grooves. The T-shaped grooves are arranged along the length direction of the support plate (233), and the multiple T-shaped grooves are arranged at equal intervals along the width direction of the support plate (233). Multiple mounting components are respectively disposed in multiple T-slots, with the top end of each mounting component protruding from the T-slot. The mounting components are used to install the fabric-reinforced silicone tube (8), the valve group (13), and the air purification component. The valve assembly (13) includes: The first three-way valve (131) has its left end opening connected to the fabric-reinforced silicone tube (8) which is connected to the inlet end of the test pump (6), and the top opening of the first three-way valve (131) is connected to or closed with the air purification component. The second three-way valve (133) has its left end opening connected to or closed with the right end opening of the first three-way valve (131), and its right end opening connected to the pressure relief tank (18). The top opening of the second three-way valve (133) is connected to or closed with the external environment or with the gas supply mechanism. The pressure relief tank (18) is connected to a plurality of quick-connect fittings (181), which are located on the side of the pressure relief tank (18) and are equally spaced along the length of the pressure relief tank (18). The bottom surface of the pressure relief tank (18) is connected to a miniature valve (182), and a plug (184) is provided at the end opening of the pressure relief tank (18). The pressure relief tank (18) is fixedly installed inside the frame (23); One of the quick-connectors (181) is connected to the right end opening of the second three-way valve (133), and the other quick-connector (181) is connected to the fabric-reinforced silicone tube (8) which is connected to the air outlet of the test pump (6). The micro valve (182) is connected to the gas supply mechanism or to the external environment, or it may be closed. The gas supply mechanism includes: Gas cylinder support (17); The gas cylinder (16) is fixedly installed inside the gas cylinder bracket (17); The gas cylinder pressure reducing valve (15) is connected to the outlet of the gas cylinder (16). The gas cylinder pressure reducing valve (15) is connected to the top opening of the second three-way valve (133) or to the micro valve (182).

2. The Roots pump test bench suitable for multiple models and multiple media as described in claim 1, characterized in that, The power mechanism includes: The motor (2) is fixedly installed on the top surface of the bearing plate (233); The bearing housing (3) has its input end coaxially fixed to the output shaft of the motor (2), and its output end is connected to the power end of the test pump (6) via transmission.

3. The Roots pump test bench suitable for multiple models and multiple media as described in claim 2, characterized in that, The first acquiring organization includes: The vibration transmitter (1) is fixedly installed on the bearing housing (3); The input end of the torque meter (5) is coaxially fixed to the output end of the bearing housing (3) via a coupling (4), and the output end of the torque meter (5) is coaxially fixed to the power input end of the test pump (6).

4. The Roots pump test bench suitable for multiple models and multiple media as described in claim 1, characterized in that, The second acquiring organization includes: The pressure sensor (9) and the temperature sensor (10) are both mounted on the fabric-reinforced silicone tube (8) which is connected to the air inlet of the test pump (6). A flow meter (12) is installed on the fabric-reinforced silicone tube (8) that is connected to the outlet of the test pump (6).

5. A test bench for Roots pumps suitable for multiple models and media as described in claim 1, characterized in that, The installation components include: T-screw (235), with the nut located in the T-slot, and the threaded section of the T-screw (235) protruding above the top surface of the bearing plate (233); Angle bracket (236) is fixedly installed on the threaded section of the T-screw (235) by a nut; The bracket base (237) is fixedly connected to the corner bracket (236), and the bracket base (237) is vertically arranged; The ferrule (238) is fixedly installed on the top of the bracket base (237), and the fabric-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).

6. The Roots pump test bench suitable for multiple models and multiple media as described in claim 1, characterized in that, The top four corners of the platform (23) are provided with threaded holes 1 (232), and the top four corners of the bearing plate (233) are provided with threaded holes 2 (234). The multiple threaded holes 2 (234) are provided in a one-to-one correspondence with the multiple threaded holes 1 (232). The diameter of the threaded hole 2 (234) is larger than the diameter of the threaded hole 1 (232). The threaded section of the lifting ring (239) passes through the threaded hole 2 (234) and is threadedly connected to the threaded hole 1 (232).

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