Testing system and testing method for hydraulic coupler

Abstract

The invention discloses a test system and a test method of a hydraulic coupler, and belongs to the technical field of hydraulic couplers. The testing system comprises a driving device, and the driving device is used for being in transmission fit with the hydraulic coupler so as to drive the hydraulic coupler to conduct testing work. The testing system further comprises a load device, the load device is electrically connected with the driving device, and the load device is used for being in transmission fit with the hydraulic coupler so as to recycle energy output by the hydraulic coupler and supply power to the driving device. Through the mode, the energy consumption of the test system can be reduced, and the test cost can be reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of hydraulic couplings, and in particular to a hydraulic coupling test system and a test method. BACKGROUND

[0002] A hydraulic coupling is a typical hydraulic transmission machine that relies on the conversion of fluid kinetic energy to achieve power transmission. In the field of nuclear power, it is often used with conventional island feed water pumps. The main functions of the hydraulic coupling are: to achieve stepless smooth speed regulation and adapt to load fluctuation requirements; to buffer the starting impact and protect the motor and working machine; to isolate vibration and reduce equipment wear; to reduce the starting current, save energy, and improve the operation stability and economy of the entire transmission system.

[0003] The performance of a hydraulic coupling directly affects the operating efficiency, reliability, and energy consumption of the host equipment. Currently, performance testing of a hydraulic coupling, including external characteristic curves, efficiency determination, overload protection performance, starting characteristics, and reliability, is a key link to ensure product quality and application effectiveness. Traditional hydraulic coupling test benches are usually open test benches (such as using a hydraulic dynamometer or an eddy current dynamometer as a load), which simulate working mechanical conditions by consuming load power. All input energy is ultimately dissipated in the form of heat, resulting in high testing costs, especially for high-power hydraulic couplings, where energy consumption is a major concern. SUMMARY

[0004] The embodiments of the present application provide a hydraulic coupling test system and a test method, which can reduce the energy consumption of the test system and reduce the testing cost.

[0005] To achieve the above-mentioned purpose, according to the first aspect of the present application, a hydraulic coupling test system is provided. The test system includes a driving device for driving the hydraulic coupling to perform test work in transmission cooperation with the hydraulic coupling. The test system also includes a load device electrically connected to the driving device, and the load device is used to recover the energy output by the hydraulic coupling and supply power to the driving device.

[0006] Optionally, the driving power provided by the driving device is W1, and the load power provided by the load device is W2, satisfying: 1 MW≤W1-W2≤1.55 MW.

[0007] Optionally, the driving device includes a first driving motor and a second driving motor, and the first driving motor is in transmission cooperation with the hydraulic coupling through the second driving motor.

[0008] Optionally, the driving device further comprises a driving side test gearbox connected with the second driving motor; and a first driving coupling, the driving side test gearbox is connected with the hydraulic coupler through the first driving coupling.

[0009] Optionally, the driving device further comprises a driving side soundproof cover; wherein the driving side soundproof cover comprises a first soundproof main body covering the outside of the first driving motor, the second driving motor and the driving side test gearbox; and a first muffler barrel arranged in the first soundproof main body, the first muffler barrel wraps the outer periphery of the first driving coupling.

[0010] Optionally, the driving device further comprises a driving side torque sensor, the first driving coupling is connected with the hydraulic coupler through the driving side torque sensor, and the driving side torque sensor is used for detecting the torque output by the driving device.

[0011] Optionally, the load device comprises a first load motor; and a second load motor, the first load motor is connected with the hydraulic coupler through the second load motor.

[0012] Optionally, the load device further comprises a load side test gearbox connected with the second load motor; and a first load coupling, the load side test gearbox is connected with the hydraulic coupler through the first load coupling.

[0013] Optionally, the load device further comprises a load side soundproof cover; wherein the load side soundproof cover comprises a second soundproof main body covering the outside of the first load motor, the second load motor and the load side test gearbox; and a second muffler barrel arranged in the second soundproof main body, the second muffler barrel wraps the outer periphery of the first load coupling.

[0014] Optionally, the load device further comprises a load side torque sensor, the first load coupling is connected with the hydraulic coupler through the load side torque sensor, and the load side torque sensor is used for detecting the torque output by the load device.

[0015] Optionally, the first load motor and the second load motor are both alternating current motors.

[0016] Optionally, the test system further comprises at least two soundproof covers, each soundproof cover covers the outside of the driving device and the load device.

[0017] Optionally, the soundproof cover comprises a soundproof main body; a soundproof plate arranged in the soundproof main body, the soundproof plate and the soundproof main body cooperatively enclose a soundproof cavity, wherein the soundproof plate comprises a porous sub-plate, an acoustic absorption sub-plate and a soundproof sub-plate arranged in a direction away from the soundproof cavity; and an exhaust muffler arranged in the soundproof main body, the exhaust muffler is used for performing muffling treatment on the gas exhausted from the soundproof cavity.

[0018] Optionally, the test system further comprises a test platform, the driving device and the load device are arranged on the test platform, and the test platform is isolated from the building foundation by the buffering material.

[0019] According to a second aspect of the present application, a test method of a hydraulic coupling is provided, the test method is based on the test system as described in the above embodiments, the test method comprises: controlling the driving device of the test system to drive the hydraulic coupling to perform test work, and controlling the load device of the test system to recover the energy output by the hydraulic coupling and supply power to the driving device; and performing performance test on the hydraulic coupling.

[0020] In the test system of the hydraulic coupling according to the embodiments of the present application, the driving device of the test system is in transmission cooperation with the hydraulic coupling to drive the hydraulic coupling to perform test work, and the load device is in transmission cooperation with the hydraulic coupling to recover the energy output by the hydraulic coupling and supply power to the driving device. In other words, the driving device and the load device of the test system according to the embodiments of the present application construct an electric power closed loading loop, the load device recovers the energy output by the hydraulic coupling and supplies power to the driving device, realizes internal circulation of energy, significantly reduces the energy consumption of the test system, and is conducive to reducing the test cost.

[0021] Other features and advantages of the present application will be described in detail in the following detailed description. BRIEF DESCRIPTION OF DRAWINGS In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0022] In order to more completely understand the present application and its advantages, the following will be described in conjunction with the drawings, wherein the same reference numerals in the following description represent the same parts.

[0023] Figure 1 is a structural schematic diagram of an embodiment of the test system of the hydraulic coupling of the present application; Figure 2 is a structural schematic diagram of an embodiment of the driving side sound shield of the present application; Figure 3 is a structural schematic diagram of an embodiment of the first sound shield plate of the present application; Figure 4 is a structural schematic diagram of an embodiment of the load side sound shield of the present application; Figure 5 is a structural schematic diagram of an embodiment of the second sound shield plate of the present application; Figure 6is a flow chart of an embodiment of a test method for the hydraulic coupling of the present application.

[0024] Legend: 10 - drive device; 11 - first drive motor; 12 - second drive motor; 13 - drive side test gear box; 141 - first drive coupling; 142 - second drive coupling; 143 - third drive coupling; 15 - drive side soundproof cover; 151 - first soundproof body; 152 - first sound muffler; 153 - first soundproof plate; 1531 - first porous sub-plate; 1532 - first sound-absorbing sub-plate; 1533 - first soundproof sub-plate; 154 - first exhaust muffler; 16 - drive side torque sensor; 20 - load device; 21 - first load motor; 22 - second load motor; 23 - load side test gear box; 241 - first load coupling; 242 - second load coupling; 243 - third load coupling; 25 - load side soundproof cover; 251 - second soundproof body; 252 - second sound muffler; 253 - second soundproof plate; 2531 - second porous sub-plate; 2532 - second sound-absorbing sub-plate; 2533 - second soundproof sub-plate; 254 - second exhaust muffler; 26 - load side torque sensor; 30 - hydraulic coupling; 40 - test platform. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by a person skilled in the art without creative labor fall within the protection scope of the present application.

[0026] The traditional hydraulic coupling test bench mainly has the following problems: 1. Serious energy waste. The traditional hydraulic coupling test bench is usually an open test bench (such as using a hydraulic dynamometer or an eddy current dynamometer as a load) which simulates the working mechanical condition by consuming load power. All input energy is finally dissipated in the form of heat energy, and the test cost is high. Especially for high-power hydraulic couplings, the energy consumption problem is particularly prominent.

[0027] 2. Limited test conditions. Limited by the power of the drive motor and the capacity of the loading device, it is difficult to realize the full-range and long-time stable test of the hydraulic coupling from no load to rated load and even overload, especially the test under large slip condition is difficult to continue.

[0028] 3. Background noise interference is large. The traditional test device (such as a driving motor, an eddy current dynamometer, a test box, etc.) generates a large mechanical noise and an air dynamic noise when it runs, which seriously interferes with the accurate measurement and analysis of the noise of the fluid coupling body, and it is difficult to meet the increasingly strict low-noise product research and development requirements.

[0029] Therefore, the embodiments of the present application provide a test system and a test method of a fluid coupling to at least solve part of the above technical problems.

[0030] To solve the technical problem of high energy consumption of the fluid coupling test bench in the prior art, an embodiment of the present application provides a test system of a fluid coupling. The test system comprises a driving device, which is used to drive the fluid coupling to perform test work in transmission cooperation with the fluid coupling. The test system further comprises a load device, which is electrically connected with the driving device and is used to recover the energy output by the fluid coupling and supply power to the driving device in transmission cooperation with the fluid coupling. The following will be described in detail.

[0031] Please refer to Figure 1 , Figure 1 which is a structural schematic diagram of an embodiment of the test system of the fluid coupling of the present application.

[0032] In an embodiment, the test system of the fluid coupling 30 comprises a driving device 10, which is used to drive the fluid coupling 30 to perform test work in transmission cooperation with the fluid coupling 30. The test system further comprises a load device 20, which is electrically connected with the driving device 10 and is used to recover the energy output by the fluid coupling 30 and supply power to the driving device 10 in transmission cooperation with the fluid coupling 30.

[0033] In the above manner, the driving device 10 and the load device 20 of the test system of the present embodiment construct an electric power closed loading loop, the load device 20 recovers the energy output by the fluid coupling 30 and supplies power to the driving device 10, realizes internal circulation of energy, significantly reduces the energy consumption of the test system, and is conducive to reducing the test cost. In the electric power closed system of the present embodiment, the electric energy emitted by the load device 20 is directly sent back to the driving device 10 and does not have to be consumed by the power grid or by a resistor. From the perspective of energy, the power grid only needs to supply the part of power that becomes heat due to mechanical friction, fluid friction and electronic element loss in the above circulation to make the test system run, which greatly reduces the electric energy consumption of the test system, and the electric energy consumption is only about 15% of that of the conventional test platform.

[0034] It should be noted that the driving power provided by the driving device 10 is W1, and the load power provided by the load device 20 is W2, which satisfies: 1MW≤W1-W2≤1.55MW, especially under full power working condition. In the test process of the hydraulic coupler 30, the difference between the driving power and the load power is controlled in a small range, which is beneficial to further reduce the energy consumption of the test system.

[0035] In an embodiment, the driving device 10 includes a first driving motor 11 and a second driving motor 12, and the first driving motor 11 is in transmission cooperation with the hydraulic coupler 30 through the second driving motor 12. The driving device 10 in this embodiment adopts the form of series connection of the first driving motor 11 and the second driving motor 12, which can provide larger driving power to meet the test requirements of the high-power hydraulic coupler 30. The first driving motor 11 and the second driving motor 12 can be 4.5MW level AC synchronous servo motors, and frequency converters with common DC bus structure are arranged to control the working mode of the first driving motor 11 and the second driving motor 12.

[0036] Further, the driving device 10 further includes a driving side test gear box 13, and the driving side test gear box 13 is in transmission connection with the second driving motor 12. The driving device 10 further includes a first driving shaft 141, and the driving side test gear box 13 is in transmission connection with the hydraulic coupler 30 through the first driving shaft 141. The driving side test gear box 13 can be a mature gear box product adapted to the rotation speed of the tested hydraulic coupler 30 and the first driving motor 11 and the second driving motor 12, which is not limited here.

[0037] The driving device 10 further includes a driving side torque sensor 16, and the first driving shaft 141 is connected with the hydraulic coupler 30 through the driving side torque sensor 16, and the driving side torque sensor 16 is used for detecting the torque output by the driving device 10. The driving side torque sensor 16 can be a strain torque sensor or the like. The input end of the driving side torque sensor 16 is selected to have a range of 0-50000Nm, the output end is selected to have a range of 0-20000Nm, and the accuracy is ±0.1%.

[0038] It should be noted that the driving device 10 further includes a second driving shaft 142 and a third driving shaft 143, and the first driving motor 11 and the second driving motor 12 are in transmission connection through the second driving shaft 142, and the driving side test gear box 13 and the second driving motor 12 are in transmission connection through the third driving shaft 143. The first driving shaft 141, the second driving shaft 142 and the third driving shaft 143 can be diaphragm couplings or the like, which are not limited here.

[0039] In an embodiment, the load device 20 comprises a first load motor 21 and a second load motor 22, and the first load motor 21 is in transmission cooperation with the hydraulic coupler 30 through the second load motor 22. The load device 20 in this embodiment adopts the form of series connection of the first load motor 21 and the second load motor 22, and can provide larger load power to meet the test requirements of the hydraulic coupler 30 of large power.

[0040] The first load motor 21 and the second load motor 22 can both be AC motors. In this embodiment, the AC motor which can be accurately controlled is used as the load motor (i.e. the first load motor 21 and the second load motor 22), so that all working conditions of the hydraulic coupler 30 from no load to rated load and even short-time overload can be accurately and smoothly simulated, and the test data is accurate and reliable. The first load motor 21 and the second load motor 22 can both be 4.5MW-level AC synchronous servo motors, and a frequency converter with a common DC bus structure is arranged to control the working mode of the first load motor 21 and the second load motor 22.

[0041] Further, the load device 20 further comprises a load-side test gear box 23, and the load-side test gear box 23 is in transmission cooperation with the second load motor 22. The load device 20 further comprises a first load shaft coupling 241, and the load-side test gear box 23 is in transmission cooperation with the hydraulic coupler 30 through the first load shaft coupling 241. The load-side test gear box 23 can be a mature gear box product which is adapted to the rotation speed of the hydraulic coupler 30 and the first load motor 21 and the second load motor 22, and is not limited here.

[0042] The load device 20 further comprises a load-side torque sensor 26, and the first load shaft coupling 241 is connected with the hydraulic coupler 30 through the load-side torque sensor 26, and the load-side torque sensor 26 is used to detect the torque output by the load device 20. The load-side torque sensor 26 can be a strain torque sensor or the like. The input end of the load-side torque sensor 26 is selected to have a range of 0-50000Nm, the output end is selected to have a range of 0-20000Nm, and the accuracy is ±0.1%.

[0043] It should be noted that the load device 20 further comprises a second load shaft coupling 242 and a third load shaft coupling 243, and the first load motor 21 and the second load motor 22 are in transmission cooperation through the second load shaft coupling 242, and the load-side test gear box 23 and the second load motor 22 are in transmission cooperation through the third load shaft coupling 243. The first load shaft coupling 241, the second load shaft coupling 242 and the third load shaft coupling 243 can all be diaphragm shaft couplings or the like, and are not limited here.

[0044] The embodiment of the present application adopts two independent hydraulic stations to provide lubricating oil for two test gearboxes (i.e. the driving side test gearbox 13 and the load side test gearbox 23) and four motors (i.e. the first driving motor 11, the second driving motor 12, the first load motor 21 and the second load motor 22). The cooling water meeting the flow requirement is provided to the heat exchanger of the test fluid coupling 30 to meet the cooling requirement of the oil supply of the fluid coupling 30.

[0045] The test system of the embodiment of the present application also integrates an advanced measurement and control system, which integrates a PLC (Programmable Logic Controller) and an industrial computer, and is used to control the motor rotating speed, torque, power of the driving device 10 and the load device 20, and the opening of the scoop pipe of the fluid coupling 30 speed regulation mechanism. The data of the driving side torque sensor 16 and the load side torque sensor 26 and the temperature, pressure, rotating speed, displacement, flow and vibration data of each monitoring point of the fluid coupling 30 are collected, and the parameters of each oil supply system are monitored, so as to realize the automatic control, data collection and processing of the test process, and improve the test efficiency and reliability. During the operation of the test system, the frequency converter controls the first driving motor 11 and the second driving motor 12 to work in the rotating speed control mode, and adjusts the output rotating speed of the first driving motor 11 and the second driving motor 12 according to the instruction. As for the first load motor 21 and the second load motor 22, the frequency converter controls them to work in the power mode (for example, the DC constant voltage mode), and can flexibly output the corresponding load torque or load power according to the set load demand instruction, so as to meet the test requirement of the whole working condition of the fluid coupling 30 from the no-load to the rated load and even the short-time overload.

[0046] Please refer to Figures 2 to 5 , Figure 2 is a structural schematic diagram of an embodiment of the driving side soundproof cover of the present application, Figure 3 is a structural schematic diagram of an embodiment of the first soundproof board of the present application, Figure 4 is a structural schematic diagram of an embodiment of the load side soundproof cover of the present application, Figure 5 is a structural schematic diagram of an embodiment of the second soundproof board of the present application.

[0047] In an embodiment, the test system further comprises at least two soundproof covers (for example, the driving side soundproof cover 15 and the load side soundproof cover 25 below), and each soundproof cover is arranged outside the driving device 10 and the load device 20. In this embodiment, the soundproof cover is arranged outside the driving device 10 and the load device 20, which effectively isolates the air sound and structure sound of the motor, the test gearbox and the transmission shaft system, creates a relatively pure acoustic test environment, makes it possible to accurately measure the body noise of the fluid coupling 30, and effectively supports the research and development of the low-noise fluid coupling 30.

[0048] The soundproof cover comprises a soundproof body (e.g., the first soundproof body 151 and the second soundproof body 251 below), which constitutes a frame of the soundproof cover and can be a steel structure frame, etc. The soundproof cover further comprises a soundproof plate (e.g., the first soundproof plate 153 and the second soundproof plate 253 below), which is arranged on the soundproof body and cooperates with the soundproof body to enclose a soundproof cavity. The driving device 10 and the load device 20 are located in the soundproof cavity, which constitutes a relatively closed cavity space and can effectively isolate the air-borne sound and structure-borne sound of the motor, the test gear box and the transmission shaft system.

[0049] Specifically, the soundproof plate comprises a porous sub-plate (e.g., the first porous sub-plate 1531 and the second porous sub-plate 2531 below), an acoustic absorption sub-plate (e.g., the first acoustic absorption sub-plate 1532 and the second acoustic absorption sub-plate 2532 below) and a soundproof sub-plate (e.g., the first soundproof sub-plate 1533 and the second soundproof sub-plate 2533 below) arranged in layers in a direction away from the soundproof cavity. The soundproof plate adopts a multi-layer composite soundproof structure, the air-borne sound and structure-borne sound are transmitted to the acoustic absorption sub-plate via the porous sub-plate and finally blocked by the soundproof sub-plate, which can greatly weaken the sound volume. The porous sub-plate can be formed by perforating a galvanized metal plate, and the thickness of the porous sub-plate can be 0.5-2 mm, such as 0.5 mm, 1 mm, 1.5 mm, 2 mm, etc. The acoustic absorption sub-plate can be rock wool, etc., the density of the rock wool can be 80K, etc., and the thickness of the acoustic absorption sub-plate can be 50-200 mm, such as 50 mm, 60 mm, 70 mm, 80 mm, 90 mm, 100 mm, 110 mm, 120 mm, 130 mm, 140 mm, 150 mm, 160 mm, 170 mm, 180 mm, 190 mm, 200 mm, etc. The soundproof sub-plate can be a steel plate, etc., and the thickness of the soundproof sub-plate can be 1-5 mm, such as 1 mm, 2 mm, 3 mm, 4 mm, 5 mm, etc. In combination with the above parameters, the overall soundproof volume of the soundproof plate of the present embodiment is ≥25 dB (A).

[0050] The soundproof cover further comprises a sound-absorbing cylinder (e.g., the first sound-absorbing cylinder 152 and the second sound-absorbing cylinder 252 below), which is wrapped around the outer periphery of the transmission shaft system of the driving device 10 and the load device 20. In this way, while ensuring that the driving device 10 and the load device 20 can be connected to the fluid coupler 30 through the respective transmission shaft systems, the air-borne sound and structure-borne sound of the transmission shaft system are effectively isolated.

[0051] The soundproof cover further comprises an exhaust muffler (e.g., the first exhaust muffler 154 and the second exhaust muffler 254 below) arranged in the soundproof body, and the exhaust muffler is used for performing muffling treatment on the gas exhausted from the soundproof cavity. It can be understood that the exhaust muffler reduces the exhaust noise by gradually reducing the exhaust pressure and attenuating the pulsation of the exhaust pressure. The muffling amount of the exhaust muffler is ≥ 30 dB (A).

[0052] The test system further comprises a test platform 40, and the driving device 10 and the load device 20 are arranged on the test platform 40. The test platform 40 is isolated from the building foundation by a buffering material. The test platform 40 can be a cast iron platform, and the test platform 40 is isolated from the building foundation by the buffering material, which can effectively block the transmission of structural noise.

[0053] It should be noted that the design of the soundproof cover and the test platform 40 of the test system in the embodiment of the present application effectively isolates the air sound and the structural sound of the motor, the test gear box and the transmission shaft system through the comprehensive design of system-level sound insulation, muffling and vibration reduction, effectively suppresses the air sound and the structural sound generated during the operation of the test system, creates a relatively pure acoustic test environment, makes it possible to accurately measure the noise of the fluid coupling 30, provides a good test environment for the noise reduction design of the fluid coupling 30, and effectively supports the research and development of the low-noise fluid coupling 30. The soundproof cover can also be provided with a personnel access door, an internal lighting system and a fire extinguishing system, etc., which are not limited herein.

[0054] In an embodiment, as shown in Figure 2 and Figure 3 The driving device 10 further comprises a driving side soundproof cover 15. The driving side soundproof cover 15 comprises a first soundproof body 151, and the first soundproof body 151 covers the outside of the first driving motor 11, the second driving motor 12 and the driving side test gear box 13. The driving side soundproof cover 15 further comprises a first muffling cylinder 152, and the first muffling cylinder 152 is arranged in the first soundproof body 151 and wrapped around the outer periphery of the first driving coupling 141. In this way, the air sound and the structural sound of the first driving coupling 141 are effectively isolated while ensuring that the driving device 10 can be connected to the fluid coupling 30 through the first driving coupling 141.

[0055] Further, the driving side soundproof cover 15 further comprises a first soundproof plate 153, the first soundproof plate 153 is arranged on the first soundproof body 151, the first soundproof plate 153 and the first soundproof body 151 cooperatively enclose a soundproof cavity, and the driving device 10 is located in the soundproof cavity. The soundproof cavity forms a relatively closed cavity space, which can effectively isolate the air sound and structure sound of the motor, the test gear box and the transmission shaft system. The first soundproof plate 153 comprises a first porous sub-plate 1531, a first sound-absorbing sub-plate 1532 and a first soundproof sub-plate 1533 which are arranged in a stacking manner away from the soundproof cavity. The driving side soundproof cover 15 further comprises a first exhaust muffler 154, the first exhaust muffler 154 is arranged on the first soundproof body 151, and the first exhaust muffler 154 is used for performing sound-absorbing treatment on the gas discharged from the soundproof cavity.

[0056] In an embodiment, as shown in Figure 4 and Figure 5 , the load device 20 further comprises a load side soundproof cover 25. The load side soundproof cover 25 comprises a second soundproof body 251, the second soundproof body 251 covers the outside of the first load motor 21, the second load motor 22 and the load side test gear box 23. The load side soundproof cover 25 further comprises a second sound-absorbing cylinder 252, the second sound-absorbing cylinder 252 is arranged on the second soundproof body 251, and the second sound-absorbing cylinder 252 is wrapped around the outer periphery of the first load shaft coupling 241. In this way, while ensuring that the load device 20 can be connected to the hydraulic coupler 30 through the first load shaft coupling 241, the air sound and structure sound of the first load shaft coupling 241 are effectively isolated.

[0057] Further, the load side soundproof cover 25 further comprises a second soundproof plate 253, the second soundproof plate 253 is arranged on the second soundproof body 251, the second soundproof plate 253 and the second soundproof body 251 cooperatively enclose a soundproof cavity, and the load device 20 is located in the soundproof cavity. The soundproof cavity forms a relatively closed cavity space, which can effectively isolate the air sound and structure sound of the motor, the test gear box and the transmission shaft system. The second soundproof plate 253 comprises a second porous sub-plate 2531, a second sound-absorbing sub-plate 2532 and a second soundproof sub-plate 2533 which are arranged in a stacking manner away from the soundproof cavity. The load side soundproof cover 25 further comprises a second exhaust muffler 254, the second exhaust muffler 254 is arranged on the second soundproof body 251, and the second exhaust muffler 254 is used for performing sound-absorbing treatment on the gas discharged from the soundproof cavity.

[0058] The test method of the hydraulic coupler 30 of the embodiment of the present application is described below.

[0059] Please refer to Figure 6 , Figure 6is a flow chart of an embodiment of a test method of the hydraulic coupler of the present application. The test method of the hydraulic coupler 30 described in this embodiment is based on the test system of the hydraulic coupler 30 described in the above embodiment.

[0060] S101: Control the driving device of the test system to drive the hydraulic coupler to perform test work, and control the load device of the test system to recover the energy output by the hydraulic coupler and use it to power the driving device.

[0061] In this embodiment, the hydraulic coupler 30 is installed in the test system of this embodiment, the driving device 10 of the test system is controlled to drive the hydraulic coupler 30 to perform test work, and the load device 20 of the test system is controlled to recover the energy output by the hydraulic coupler 30 and use it to power the driving device 10.

[0062] The driving device 10 and the load device 20 of the test system of this embodiment form an electric power closed loading loop, the load device 20 recovers the energy output by the hydraulic coupler 30 and uses it to power the driving device 10, realizes internal circulation of energy, significantly reduces the energy consumption of the test system, and is conducive to reducing the test cost. In the electric power closed system of this embodiment, the electric energy emitted by the load device 20 is directly sent back to the driving device 10 and does not have to pass through the power grid or be consumed by a resistor. From the perspective of energy, the power grid only needs to supply the part of the power that becomes heat due to mechanical friction, hydraulic friction and electronic element loss in the above cycle to make the test system operate, which greatly reduces the electric energy consumption of the test system, which is only about 15% of the electric energy consumption of a conventional test platform.

[0063] Further, under full power working conditions, the driving power provided by the driving device 10 is W1, and the load power provided by the load device 20 is W2, which satisfies: 1 MW≤W1-W2≤1.55 MW. In the test process of the hydraulic coupler 30 of this embodiment, the difference between the driving power and the load power is controlled to be in a small range, which is conducive to further reducing the energy consumption of the test system.

[0064] S102: Perform performance test on the hydraulic coupler.

[0065] In this embodiment, performance test is performed on the hydraulic coupler 30. Specifically, full performance test can be performed on the hydraulic coupler 30 according to the test outline of each type of hydraulic coupler 30, and the test content can include external characteristic curve, efficiency determination, overload protection performance, starting characteristic, noise and reliability, etc. The test process can be automatically controlled and data acquisition and processing.

[0066] In summary, the test system and test method of the hydraulic coupler 30 of the embodiments of the present application have the following advantages: 1. High efficiency and energy saving: the electric power closed loading technology is adopted, the energy is internally circulated between the driving device 10 and the load device 20, and the power grid only compensates for system loss, so that the energy saving of the open test bench can reach more than 85%, the test cost is greatly reduced, and the test is especially suitable for long-time test of high-power products.

[0067] 2. Full load and high precision test: the embodiment can smoothly and stably simulate all working conditions from no load to rated power and even short-time overload, especially can maintain large slip working condition for a long time, so that the heating and overload protection performance of the fluid coupling 30 can be researched. The driving side torque sensor 16 and the load side torque sensor 26 arranged at both ends of the fluid coupling 30 can directly measure the input and output torques, so that the intermediate link error is reduced, and the test precision is high.

[0068] 3. Lower background noise: the design of the soundproof cover and the test platform 40 of the test system is adopted, the air sound and the structure sound of the motor, the test gear box and the transmission shaft system are effectively isolated through the comprehensive design of system-level sound insulation, sound elimination and vibration reduction, the air sound and the structure sound generated during the operation of the test system are effectively suppressed, a relatively pure acoustic test environment is created, the accurate measurement of the fluid coupling 30 body noise is possible, a good test environment is provided for the noise reduction design of the fluid coupling 30, and the research and development of the low-noise fluid coupling 30 is supported.

[0069] 4. Compact structure and high automation: the whole test system has high integration, the automation of the test process and the real-time processing of the test data can be realized through the control unit, and the test efficiency and reliability are improved.

[0070] In the description of the present application, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0071] In the above embodiments, the description of each embodiment has its own emphasis, and the parts not described in detail in a certain embodiment can be referred to the related description of other embodiments.

[0072] The embodiments, implementation manners and related technical features of the present application can be combined, replaced or modified without conflict.

[0073] The above is only a preferred embodiment of the present application, and does not limit the present application in any form, but any simple modification, equivalent change and modification made to the above embodiment without departing from the technical solution of the present application and according to the technical essence of the present application, still belongs to the scope of the technical solution of the present application.

Claims

1. A test system for a fluid coupling, characterized by, The test system comprises: a driving device configured to be in driving cooperation with the hydraulic coupler to drive the hydraulic coupler to perform a test operation; and a load device electrically connected to the driving device, the load device being configured to be in driving cooperation with the hydraulic coupler to recover energy output by the hydraulic coupler and to supply power to the driving device.

2. The test system of claim 1, wherein the driving device provides a driving power of W1, and the load device provides a load power of W2, and 1 MW≤W1-W2≤1.55 MW is satisfied.

3. The test system of claim 1 or 2, wherein the driving device comprises: a first driving motor; and a second driving motor, the first driving motor being in driving cooperation with the hydraulic coupler through the second driving motor.

4. The test system of claim 3, wherein the driving device further comprises: a driving-side test gear box connected in driving cooperation with the second driving motor; and a first driving coupling, the driving-side test gear box being connected in driving cooperation with the hydraulic coupler through the first driving coupling.

5. The test system of claim 4, wherein the driving device further comprises a driving-side soundproof cover, wherein the driving-side soundproof cover comprises: a first soundproof main body covering the outside of the first driving motor, the second driving motor, and the driving-side test gear box; and a first sound-absorbing cylinder arranged in the first soundproof main body, the first sound-absorbing cylinder being wrapped around the outer periphery of the first driving coupling.

6. The test system of claim 4, wherein the driving device further comprises: a driving-side torque sensor, the first driving coupling being connected with the hydraulic coupler through the driving-side torque sensor, the driving-side torque sensor being configured to detect the torque output by the driving device.

7. The test system of claim 1 or 2, wherein the load device comprises: a first load motor; and a second load motor, the first load motor being in driving cooperation with the hydraulic coupler through the second load motor.

8. The test system of claim 7, wherein the load device further comprises: a load-side test gear box connected in driving cooperation with the second load motor; and a first load coupling, the load-side test gear box being connected in driving cooperation with the hydraulic coupler through the first load coupling.

9. The test system of claim 8, wherein the load device further comprises a load-side soundproof cover, wherein the load-side soundproof cover comprises: a second soundproof main body covering the outside of the first load motor, the second load motor, and the load-side test gear box; and a second sound-absorbing cylinder arranged in the second soundproof main body, the second sound-absorbing cylinder being wrapped around the outer periphery of the first load coupling.

10. The test system of claim 8, wherein the load device further comprises: A load side torque sensor, the first load coupling is connected with the hydraulic coupling through the load side torque sensor, the load side torque sensor is used for detecting the torque output by the load device.

11. The test system of claim 7, wherein, The first load motor and the second load motor are both AC motors.

12. The test system of claim 1 or 2, wherein, The test system further comprises at least two soundproof enclosures, each of the soundproof enclosures is respectively arranged outside the drive device and the load device.

13. The test system of claim 12, wherein, The soundproof enclosure comprises: A soundproof main body; A soundproof plate arranged in the soundproof main body, the soundproof plate and the soundproof main body cooperatively define a soundproof cavity, wherein the soundproof plate comprises a plurality of sub-plates stacked in a direction away from the soundproof cavity, the plurality of sub-plates comprises a porous sub-plate, a sound-absorbing sub-plate and a soundproof sub-plate; and An exhaust muffler arranged in the soundproof main body, the exhaust muffler is used for performing sound-absorbing treatment on the gas exhausted from the soundproof cavity.

14. The test system of claim 1 or 2, wherein, The test system further comprises: A test platform, the drive device and the load device are arranged on the test platform, and the test platform is isolated from the building foundation by a buffering material.

15. A method of testing a fluid coupling, characterized by, The test method is based on the test system as claimed in any one of claims 1 to 14, and the test method comprises: Controlling the drive device of the test system to drive the hydraulic coupling to perform test work, and controlling the load device of the test system to recover the energy output by the hydraulic coupling and used for power supply to the drive device; Performing performance test on the hydraulic coupling.

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