A modular powertrain test system and its application

Abstract

The present invention relates to the technical field of engineering machinery powertrain equipment, and in particular to a modular powertrain test system and application. According to different powertrain assembly test requirements and on-site test environmental conditions, the system uses the following test modules for structural and positional combination, including: an engine power module; this module serves as the power source of the tested power system, and can install and match different engines to ensure the normal operation of the tested power system; and / or, one or more linear motion servo loading modules; this module is used to simulate and dynamically load the linear motion within the module; and / or, one or more rotary motion servo loading modules; this module is used to simulate and dynamically load the rotary motion within the module; and, a servo oil source module; this module is used to provide a constant pressure servo control oil source to each servo loading module. The entire modular powertrain test system greatly improves the test function and efficiency of the test bench.

Description

Technical Field

[0001] The present invention relates to the technical field of engineering machinery assembly equipment, and in particular to a modular powertrain test system and application thereof. Background Art

[0002] The workload of construction machinery is a dynamic random process, and the load changes dramatically and in a short period during the operation process. Most of the traditional transmission system designs are matched and designed according to the static parameter matching theory. The system matching performance cannot be fully utilized, its efficiency and fuel economy cannot reach the optimal level, and the applicability of components such as engines, hydraulic systems, and hydraulic components cannot be fully verified. If the research method of actual prototype test analysis is adopted, it will require high costs, many influencing factors, and it will be difficult to change the configuration parameters and control strategies. The test cycle is too long, and the reproducibility and consistency of the test data are poor. When hydraulic proportional loading control technology is used, due to the poor dynamic response of the loading control, the load change process under actual working conditions cannot be well reproduced, resulting in large test errors. In addition, the entire powertrain test system is technically difficult, has poor versatility, and a long design and manufacturing cycle, making it difficult to quickly meet different test requirements. Summary of the invention

[0003] The present invention provides a modular powertrain test system and application to solve the technical problems existing in the known technology.

[0004] In order to achieve the above object, the present invention adopts the following technical solution:

[0005] A modular powertrain test system can be configured with the following different test modules for structure and position combination according to different powertrain assembly test requirements and field test environment conditions, including:

[0006] Engine power module: As the power source of the tested power system, this module can be installed and matched with different engines to ensure the normal operation of the tested power system;

[0007] and / or, one or more linear motion servo loading modules; the modules are used to simulate and dynamically load the linear motion forms within the modules;

[0008] and / or, one or more rotary motion servo loading modules; the modules are used to simulate and dynamically load the rotary motion forms within the modules;

[0009] And, a servo oil source module; the module is used to provide a constant pressure servo control oil source to the above servo loading modules.

[0010] Furthermore, the engine power module at least includes an engine mounting structure and a fuel consumption meter and fuel temperature control system, an intercooler system, a water cooling system and a sound-absorbing and smoke-exhausting structure to ensure the normal operation of the engine; the engine mounting structure includes a mounting platform, an engine support leg, an engine, a flywheel connecting seat, a first transmission shaft, a torque speed sensor, a hydraulic pump mounting seat and a tested hydraulic pump; the engine is fixed to the mounting platform through the engine support leg; the flywheel connecting seat is connected to one end of the first transmission shaft through the flywheel of the engine; the hydraulic pump mounting seat is fixed to the side where the output end of the engine is located; the tested hydraulic pump is fixed on the hydraulic pump mounting seat; the torque speed sensor is connected between the first transmission shaft and the hydraulic pump mounting seat, so that the flywheel mounting seat can output power to the hydraulic pump mounting seat through the flywheel of the engine in sequence through the first transmission shaft and the torque speed sensor, thereby driving the tested hydraulic pump to work.

[0011] Furthermore, the linear motion servo loading structure includes a cylinder fixing structure, a test hydraulic cylinder and a servo hydraulic cylinder; the test hydraulic cylinder and the servo hydraulic cylinder are coaxially arranged on the cylinder fixing structure, and the test hydraulic cylinder and the servo hydraulic cylinder can reciprocate along the axial line.

[0012] Further, the cylinder body fixing structure includes a cylinder barrel mounting seat, a hydraulic cylinder mounting frame, a cylinder barrel support, a supporting guide rail, a cylinder rod mounting seat, a tension and compression sensor and a servo cylinder mounting seat;

[0013] The cylinder mounting seat, cylinder support and servo cylinder mounting seat are respectively connected to the hydraulic cylinder mounting frame at a certain interval along the axial direction of the tested hydraulic cylinder; the servo cylinder mounting frame is arranged at one end of the hydraulic cylinder mounting frame away from the cylinder mounting seat; the support guide rail is connected between the servo cylinder mounting seat and the cylinder support along the axial direction of the tested hydraulic cylinder; the cylinder rod mounting seat is slidably connected with the support guide rail to ensure that the cylinder rod mounting seat moves linearly along the axial direction of the tested hydraulic cylinder; the tested hydraulic cylinder includes a cylinder pin, a cylinder and a cylinder rod pin; the cylinder pin is connected to the cylinder support, the cylinder is connected to the hydraulic cylinder mounting frame, and the cylinder rod pin is connected to the servo hydraulic cylinder through the cylinder rod mounting seat and the tension and compression sensor in turn; the tested hydraulic cylinder is coaxially arranged with the servo hydraulic cylinder, and the cylinder rod pin of the tested hydraulic cylinder is connected to the servo hydraulic cylinder through the cylinder rod mounting seat and the tension and compression sensor; the servo hydraulic cylinder is fixed to the hydraulic cylinder mounting frame through the servo cylinder mounting seat; a servo valve group and a displacement sensor are installed on the servo hydraulic cylinder; an accumulator group is designed on one side of the servo valve group.

[0014] Furthermore, the rotary motion servo loading module includes a servo control valve group, an accumulator group and a rotary motion servo loading structure; the rotary motion servo loading structure mainly includes a motor mounting frame; a servo loading motor, a coupling, a torque tachometer, a second transmission shaft, a bearing seat, a bushing and a mounting flange are installed on the motor mounting frame; the output shaft, the coupling, the torque tachometer and the second transmission shaft of the servo loading motor are coaxially connected in sequence, and the bearing seat is arranged on the side of the motor mounting frame facing the second transmission shaft; the test motor is fixed to the bearing seat by a mounting flange; a bushing is arranged in the bearing seat, one end of the bushing is connected to the output shaft of the test motor, and the other end is connected to the second transmission shaft.

[0015] Furthermore, the servo oil source module includes more than one modular hydraulic station, a high-pressure oil outlet pipe, a low-pressure oil return pipe, a high-pressure main oil supply pipe, a low-pressure main oil return pipe and a module connecting oil pipe; the multiple modular hydraulic stations in the system are arranged according to the site environment, and adjacent modular hydraulic stations are connected in series through module connecting oil pipes; the high-pressure oil source is converged into a large-flow high-pressure oil supply equipment through the high-pressure oil outlet pipe and the high-pressure main oil supply pipe, and the used large-flow low-pressure return oil is then divided into multiple small return oils through the low-pressure main return oil pipe and returned to the hydraulic oil tanks of each module for recycling.

[0016] Furthermore, each of the modular hydraulic stations mainly includes a chassis, on which a hydraulic oil tank and a hydraulic motor are placed side by side; the hydraulic oil tank is provided with an oil outlet, a pressure oil supply port and an oil return port; an oil suction port butterfly valve, a hydraulic pump, a pipeline filter and a pressure regulating valve group are connected in sequence between the oil outlet and the pressure oil supply port, the hydraulic pump is connected to the hydraulic motor, the hydraulic oil in the hydraulic oil tank flows into the hydraulic pump through the oil suction port butterfly valve, the hydraulic motor drives the hydraulic pump to pressurize the hydraulic oil into high-pressure oil, and the high-pressure oil enters the pressure regulating valve group after being filtered by the pipeline filter; the pressure regulating valve group includes a high-pressure port and an overflow port, wherein the high-pressure port serves as the pressure oil supply port, the overflow port is connected to one end of the radiator II after merging with the pipeline where the oil return port is located, and the other end of the radiator II is connected to the return oil filter.

[0017] Furthermore, the hydraulic oil tank is provided with a connecting oil port, and a plurality of modular hydraulic stations are arranged according to the site environment. According to the arrangement distance, adjacent modular hydraulic stations are connected in series through a module connecting oil pipe to connect the connecting oil ports of each modular hydraulic station.

[0018] Furthermore, the system also includes a circulating oil pipe, a circulating motor, a circulating hydraulic pump, a radiator I and an auxiliary oil return port; one end of the circulating hydraulic pump is connected to the circulating motor, and the other end is connected to the radiator I, and the radiator I is connected to the auxiliary oil return port on the top of another hydraulic oil tank through the circulating oil pipe.

[0019] Furthermore, the present invention also discloses the application of the above-mentioned modular powertrain test system: the test modules of the test system can be combined into a full hydraulic central drive walking test system, and / or a full hydraulic two-wheel drive test system, and / or a hybrid transmission test system.

[0020] The advantages and positive effects of the present invention are:

[0021] 1. Aiming at the form of typical engineering machinery powertrain, the present invention divides the entire powertrain test system into four major module structures, namely, engine power module, linear motion servo loading module, rotary motion servo loading module, and servo oil source module. Different test modules can be selected for various flexible modular combinations according to different powertrain assembly test requirements and on-site test environment conditions.

[0022] 2. Aiming at the two main working drive forms of engineering machinery hydraulic cylinder and hydraulic motor, two typical loading modules, linear motion servo loading module and rotary motion servo loading module, are designed. Each module is designed with simple overall structure, relatively independent functions and convenient replacement. It is easy to combine and has strong versatility, which reduces the difficulty of design and manufacturing and the processing and manufacturing cycle.

[0023] 3. In view of the high response and dynamic random change characteristics of the workload of engineering machinery, the hydraulic servo loading control method is adopted to load the working device of the engineering machinery powertrain, realizing the dynamic loading and control of two typical movements of the engineering machinery cylinder and motor, and well simulating the typical working conditions of the engineering machinery powertrain, realizing the powertrain matching and related technical research, filling the gap in the research methods of powertrain dynamic matching technology.

[0024] 4. For powertrain systems of different power, the flow requirements of the servo oil source system are also different; the use of a modular combination of distributed hydraulic oil source system design can effectively improve the versatility of the servo oil source system.

[0025] 5. Aiming at the needs of various engine drive systems, the engine power module can provide installation conditions for different engines and guarantee the normal operation of the engine; BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a schematic diagram of the engine mounting structure of the present invention;

[0027] Figure 2 It is a schematic diagram of the linear motion servo loading structure in the present invention;

[0028] Figure 3 It is a schematic diagram of the rotary motion servo loading structure in the present invention;

[0029] Figure 4is a top view of the distributed hydraulic oil source system of the present invention;

[0030] Figure 5 is a front view of the modular hydraulic station of the present invention;

[0031] Figure 6 yes Figure 5 Top view of the .

[0032] Among them: 11. Installation platform; 12. Engine support leg; 13. Engine; 14. Flywheel connection seat; 15. First transmission shaft; 16. Torque speed sensor; 17. Hydraulic pump mounting seat; 18. Tested hydraulic pump; 19. Support;

[0033] 21. Cylinder mounting seat; 22. Hydraulic cylinder mounting frame; 23. Tested hydraulic cylinder; 24. Cylinder support; 25. Support guide rail; 26. Cylinder rod mounting seat; 27. Tension and compression sensor; 28. Servo cylinder mounting seat; 29. ​​Servo hydraulic cylinder; 210. Accumulator group; 211. Servo valve group; 212. Displacement sensor;

[0034] 31. Motor mounting frame; 32. Servo loading motor; 33. Coupling; 34. Torque tachometer; 35. Second transmission shaft; 36. Bearing seat; 37. Bushing; 38. Mounting flange; 39. Test motor;

[0035] 41. Hydraulic station; 41-1. Chassis; 41-2. Hydraulic oil tank; 41-3. Motor support; 41-4. Hydraulic motor; 41-5. Pressure oil supply port; 41-6. Oil return port; 41-7. Connecting oil port; 41-8. Auxiliary oil return port; 41-9. Radiator II; 41-10. Oil suction port butterfly valve; 41-11. Hydraulic pump; 41-12. Pipeline filter; 41-13. Pressure regulating valve group, 41-14. 1-14, air filter; 41-15, temperature sensor; 41-16, electrical control cabinet; 41-17, oil return filter; 42, module connecting oil pipe I; 43, module connecting oil pipe II; 44, high-pressure oil outlet pipe; 45, low-pressure oil return pipe; 46, high-pressure main oil supply pipe; 47, low-pressure main oil return pipe; 48, circulating oil pipe; 49, circulating motor; 410, circulating hydraulic pump; 411, radiator I. DETAILED DESCRIPTION

[0036] 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. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without creative work are within the scope of protection of the present invention.

[0037] The present invention provides a modular powertrain test system, which includes an engine power module, a linear motion servo loading module, a rotary motion servo loading module and a servo oil source module. Among them, the engine power module, as the power source of the tested power system, can be installed and matched with different engines to ensure the normal operation of the tested power system; the linear motion servo loading module is mainly used to simulate and dynamically load linear motion forms such as hydraulic cylinders; the rotary motion servo loading module is mainly used to simulate and dynamically load rotary motion forms such as hydraulic motors; the servo oil source module mainly provides a constant pressure servo control oil source for each servo loading module; the modular powertrain test system can select one or more different test modules for modular matching and combination according to different powertrain assembly test needs and on-site test environment conditions.

[0038] Specifically, the engine power module at least includes an engine mounting structure, a fuel consumption meter and a fuel temperature control system, an intercooler system, a water cooling system, and a noise and smoke exhaust structure to ensure the normal operation of the engine. Figure 1 As shown, it mainly includes a mounting platform 11, an engine leg 12, an engine 13, a flywheel connection seat 14, a first transmission shaft 15, a torque speed sensor 16, a hydraulic pump mounting seat 17 and a tested hydraulic pump 18; the engine 13 is fixed on the mounting platform 11 through the engine leg 12, and the engine leg 12 can be adjusted up and down according to different engine 13 installation requirements; the flywheel connection seat 14 is sleeved on the rear end of the crankshaft of the engine 13 and connected to one end of the first transmission shaft 15 through the engine flywheel; the hydraulic pump mounting seat 17 is fixed to the side where the output end of the engine 13 is located through the support 19 on the mounting platform 11; the tested hydraulic pump 18 is fixed to the spline sleeve through the mounting flange 38 on the hydraulic pump mounting seat 17; the torque speed sensor 16 is connected between the first transmission shaft 15 and the hydraulic pump mounting seat 17. In this way, the flywheel mounting seat can output power to the hydraulic pump mounting seat 17 through the flywheel of the engine 13 through the first transmission shaft 15 and the torque speed sensor 16 in sequence, thereby driving the tested hydraulic pump 18 to work.

[0039] Linear motion servo loading structure such as Figure 2 As shown, it mainly includes a cylinder fixing structure, a tested hydraulic cylinder 23 and a servo hydraulic cylinder 29; the cylinder fixing structure includes a cylinder mounting seat 21, a hydraulic cylinder mounting frame 22, a cylinder support 24, a support guide rail 25, a cylinder rod mounting seat 26, a tension and compression sensor 27 and a servo cylinder mounting seat 28; the cylinder mounting seat 21, the cylinder support 24 and the servo cylinder mounting seat 28 are respectively connected to the hydraulic cylinder mounting frame 22 at a certain distance;

[0040] The cylinder mounting seat 21, cylinder support 24 and servo cylinder mounting seat 28 are respectively connected to the hydraulic cylinder mounting frame 22 along the axial direction of the tested hydraulic cylinder 23 at a certain interval; the servo cylinder mounting frame is arranged at one end of the hydraulic cylinder mounting frame 22 away from the cylinder mounting seat 21; the support guide rail 25 is connected between the servo cylinder mounting seat 28 and the cylinder support 24 along the axial direction of the tested hydraulic cylinder 23; the cylinder rod mounting seat 26 is slidably connected to the support guide rail 25 to ensure that the cylinder rod mounting seat 26 moves linearly along the axial direction of the tested hydraulic cylinder 23; the tested hydraulic cylinder 23 includes a cylinder pin, a cylinder and a cylinder rod pin; the cylinder pin is connected to the cylinder support Then, the cylinder is connected to the hydraulic cylinder mounting frame 22, and the cylinder rod pin is connected to the servo hydraulic cylinder 29 through the cylinder rod mounting seat 26 and the tension and compression sensor 27 in turn; the tested hydraulic cylinder 23 is coaxially arranged with the servo hydraulic cylinder 29, and the cylinder rod pin of the tested hydraulic cylinder 23 is connected to the servo hydraulic cylinder 29 through the cylinder rod mounting seat 26 and the tension and compression sensor 27; the servo hydraulic cylinder 29 is fixed to the hydraulic cylinder mounting frame 22 through the servo cylinder mounting seat 28; a servo valve group 211 and a displacement sensor 212 are installed on the servo hydraulic cylinder 29; in order to ensure the stability of the servo valve control pressure, an accumulator group 210 is designed near the servo valve group 211. The present invention can also meet different installation and loading requirements of the tested hydraulic cylinder 23 by adjusting the position of the cylinder barrel mounting seat 21 and the pin tooling of the tested hydraulic cylinder 23. It can be seen that the hydraulic cylinder mounting frame 22 carries many other components of the module, which is convenient for the overall adjustment and installation of the module.

[0041] The rotary motion servo loading module mainly includes a servo control valve group, an accumulator group and a rotary motion servo loading structure; the rotary motion servo loading structure is as follows Figure 3 As shown, it mainly includes a motor mounting frame 31; a servo loading motor 32, a coupling 33, a torque tachometer 34, a second transmission shaft 35, a bearing seat 36, a sleeve 37 and a mounting flange 38 are installed on the motor mounting frame 31; specifically, the output shaft of the servo loading motor 32, the coupling 33, the torque tachometer 34 and the second transmission shaft 35 are coaxially connected in sequence, and the bearing seat 36 is arranged on the side of the motor mounting frame 31 facing the second transmission shaft 35; the tested motor 39 is fixed to one end of the bearing seat 36 facing the second transmission shaft 35 through the mounting flange 38; a sleeve 37 is arranged in the bearing seat 36, one end of the sleeve 37 is connected to the output shaft of the tested motor 39, and the other end is connected to the second transmission shaft 35;: since the tested motor is an actual hydraulic motor used in the power system to be tested, different tested motors need to be replaced according to different power systems, and the servo loading motor is a motor used for load simulation loading of the tested motor, which can be fixed without replacement. The module meets the installation requirements of different tested motors 39 by replacing different shaft sleeves 37 and mounting flanges 38, and is convenient for flexible assembly with other modules.

[0042] Distributed hydraulic oil source system such as Figure 4-6 As shown, it includes one or more modular hydraulic stations 41, a high-pressure oil outlet pipe 44, a low-pressure oil return pipe 45, a high-pressure main oil supply pipe 46, a low-pressure main oil return pipe 47, a circulating oil pipe 48, a circulating motor 49, a circulating motor 410 and a radiator I 411. Each modular hydraulic station 41 mainly includes a chassis 41-1, on which a hydraulic oil tank 41-2, a motor support 41-3 and a corresponding hydraulic motor 41-4 are placed side by side; the hydraulic oil tank 41-2 is provided with an oil outlet, a pressure oil supply port 41-5, an oil return port 41-6, a connecting oil port 41-7 and an auxiliary oil return port 41-8; between the oil outlet and the pressure oil supply port 41-5 are connected an oil suction port butterfly valve 41-10, a hydraulic pump 41-11, a pipeline filter 41-12 and a pressure regulating valve group 41-13 in sequence, and the hydraulic pump 41-11 is connected to the hydraulic motor 41-4; thus, the hydraulic oil in the hydraulic oil tank 41-2 flows into the hydraulic pump 41-11 through the oil suction port butterfly valve 41-10, The hydraulic motor 41-4 drives the hydraulic pump 41-11 to pressurize the hydraulic oil into high-pressure oil. The high-pressure oil enters the pressure regulating valve group 41-13 after being filtered by the pipeline filter 41-12. The high-pressure oil of the pressure regulating valve group 41-13 is pressure-adjusted and then supplied to the system through the pressure oil supply port 41-5; the pressure regulating valve group 41-13 includes a high-pressure port and an overflow port, wherein the high-pressure port serves as the pressure oil supply port, and the overflow port is connected to one end of the radiator II 41-9 after merging with the pipeline where the return oil port 41-6 is located, and the other end of the radiator II 41-9 is connected to the return oil filter, so that the overflowed hydraulic oil merges with the low-pressure oil flowing back from the return oil port 41-6 and then flows through the radiator II 41-9, the return oil filter 41-17, and then flows back to the hydraulic oil tank 41-2 through the overflow port.

[0043] The upper part of the hydraulic oil tank 41-2 is also designed with an auxiliary oil return port 41-8, an air filter 41-14, and a temperature sensor 41-15. Each modular hydraulic station 41 is designed with an independent electrical control cabinet 41-16, which can independently complete the detection and control of the control valve group such as the motor, hydraulic oil temperature, pressure regulating valve group 41-13, hydraulic oil pressure, hydraulic oil tank 41-2 liquid level, oil suction port butterfly valve 41-10; the system is equipped with a master electronic control device to centrally control and manage the electrical control cabinets 41-16 of all hydraulic stations 41, which is convenient for managing and controlling the master electronic control device by communication.

[0044] The multiple modular hydraulic stations 41 in the system are arranged according to the on-site environment. According to the arrangement distance, the adjacent modular hydraulic stations 41 are connected in series through the short module connecting oil pipe I 42 or the long module connecting oil pipe II 43 to connect the connecting oil port 41-7 of each modular hydraulic station 41, so as to ensure that the liquid level of the hydraulic oil tank 41-2 of each modular hydraulic station 41 is at the same height. One end of the high-pressure oil outlet pipe 44 of each modular hydraulic station 41 is connected to the pressure oil supply port 41-5, and the other end is connected to the high-pressure main oil supply pipe 46; one end of each low-pressure oil return pipe 45 is connected to the oil return port 41-6, and the other end is connected to the low-pressure main oil return pipe 47, so that the high-pressure oil sources on multiple hydraulic stations 41 can be merged into a large-flow high-pressure oil supply equipment on the high-pressure main oil supply pipe 46, and the large-flow low-pressure return oil after use is divided into multiple small return oils through the low-pressure main oil return pipe 47 and returned to each module hydraulic oil tank 41-2 for recycling. In addition, one end of the circulation motor 410 is connected to the circulation motor 49, and the other end is connected to the radiator I411. The radiator I is connected to the auxiliary oil return port 41-8 on the upper part of another hydraulic oil tank 41-2 through a circulation oil pipe, so that the circulation motor 49 drives the circulation motor 410 to output the hydraulic oil in a hydraulic oil tank 41-2 to the radiator I411, and the hydraulic oil flows into another hydraulic station after the heat is dissipated by the radiator I411, which helps to circulate the hydraulic oil and make the oil temperature uniform in the entire distributed hydraulic oil source system.

[0045] A modular powertrain test system can select different test modules for various flexible modular combinations according to different powertrain assembly test requirements and on-site test environment conditions. Examples are as follows:

[0046] 1. Fully hydraulic central drive walking test system

[0047] An engine power module, a rotary motion servo loading module and a servo oil source module are selected, and the corresponding hydraulic pipelines of each module are connected to form a full hydraulic tractor transmission system; the engine of the engine power module drives the hydraulic pump, and the hydraulic pump drives the test hydraulic motor of the rotary motion servo module. The servo loading motor uses the high-pressure servo oil source of the servo oil source module to control and load the torque and speed of the test motor.

[0048] 2. Fully hydraulic two-wheel drive test system

[0049] Select an engine power module, two rotary motion servo loading modules and a servo oil source module, and connect the corresponding hydraulic pipelines of each module to form a full hydraulic bulldozer transmission system. The engine of the engine power module drives the double hydraulic pump, and the double hydraulic pump drives the tested hydraulic motors of the two rotary motion servo modules. The servo loading motor uses the high-pressure servo oil source of the servo oil source module to control and load the torque and speed of the tested motor.

[0050] 3. Hybrid transmission test system

[0051] Select an engine power module, three linear motion servo loading modules, a rotary motion servo loading module and a servo oil source module, and connect the corresponding hydraulic pipelines of each module to form a hydraulic excavator transmission system. The engine of the engine power module drives the hydraulic pump, and the hydraulic pump drives the tested cylinders of the three linear motion servo loading modules and the tested motor of the rotary motion servo module through a multi-way reversing valve. The servo loading cylinder uses the high-pressure servo oil source of the servo oil source module to control and load the speed and tension of the tested cylinder, and the servo loading motor uses the high-pressure servo oil source of the servo oil source module to control and load the torque and speed of the tested motor.

[0052] The entire modular powertrain test system greatly improves the test function and test efficiency of the test bench.

[0053] The embodiments of the present invention are described in detail above, but the contents are only preferred embodiments of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made according to the scope of application of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A modular powertrain test system, characterized in that: These include: Engine power module: As the power source of the tested power system, this module can be installed and matched with different engines to ensure the normal operation of the tested power system; and / or, one or more linear motion servo loading modules; the modules are used to simulate and dynamically load the linear motion forms within the modules; and / or, one or more rotary motion servo loading modules; the modules are used to simulate and dynamically load the rotary motion forms within the modules; and, a servo oil source module; the module is used to provide a constant pressure servo control oil source to each of the above servo loading modules; According to different powertrain assembly test requirements and on-site test environment conditions, the modular powertrain test system can use the following different test modules for structure and position combination; specifically: When the modular powertrain test system is a full hydraulic central drive walking test system: select an engine power module, a rotary motion servo loading module and a servo oil source module, and connect the hydraulic pipelines corresponding to each module to form a full hydraulic tractor transmission system; When the modular powertrain test system is a full hydraulic two-wheel drive test system: select an engine power module, two rotary motion servo loading modules and a servo oil source module, and connect the hydraulic pipelines corresponding to each module to form a full hydraulic bulldozer transmission system; When the modular powertrain test system is a hybrid transmission test system: selecting an engine power module, three linear motion servo loading modules, a rotary motion servo loading module and a servo oil source module, and connecting the hydraulic pipelines corresponding to the modules to form a hydraulic excavator transmission system; The engine power module at least includes an engine mounting structure, a fuel consumption meter and a fuel temperature control system, an intercooler system, a water cooling system and a sound-absorbing and smoke-exhausting structure to ensure the normal operation of the engine; the engine mounting structure includes a mounting platform, an engine support leg, an engine, a flywheel connecting seat, a first transmission shaft, a torque speed sensor, a hydraulic pump mounting seat and a tested hydraulic pump; the engine is fixed to the mounting platform through the engine support leg; the flywheel connecting seat is connected to one end of the first transmission shaft through the flywheel of the engine; the hydraulic pump mounting seat is fixed to the side where the output end of the engine is located; the tested hydraulic pump is fixed to the hydraulic pump mounting seat; the torque speed sensor is connected between the first transmission shaft and the hydraulic pump mounting seat, so that the flywheel mounting seat can output power to the hydraulic pump mounting seat through the flywheel of the engine in sequence through the first transmission shaft and the torque speed sensor, thereby driving the tested hydraulic pump to work; The linear motion servo loading structure comprises a cylinder fixing structure, a tested hydraulic cylinder and a servo hydraulic cylinder; the tested hydraulic cylinder and the servo hydraulic cylinder are coaxially arranged on the cylinder fixing structure, and the tested hydraulic cylinder and the servo hydraulic cylinder can reciprocate along the axial straight line; The rotary motion servo loading module includes a servo control valve group, an accumulator group and a rotary motion servo loading structure; the rotary motion servo loading structure mainly includes a motor mounting frame; a servo loading motor, a coupling, a torque tachometer, a second transmission shaft, a bearing seat, a sleeve and a mounting flange are installed on the motor mounting frame; the output shaft, the coupling, the torque tachometer and the second transmission shaft of the servo loading motor are coaxially connected in sequence, and the bearing seat is arranged on the side of the motor mounting frame facing the second transmission shaft; the tested motor is fixed on the bearing seat by a mounting flange; a sleeve is arranged in the bearing seat, one end of the sleeve is connected to the output shaft of the tested motor, and the other end is connected to the second transmission shaft; The servo oil source module includes more than one modular hydraulic station, a high-pressure oil outlet pipe, a low-pressure oil return pipe, a high-pressure main oil supply pipe, a low-pressure main oil return pipe and a module connecting oil pipe; the multiple modular hydraulic stations in the system are arranged according to the site environment, and adjacent modular hydraulic stations are connected in series through module connecting oil pipes; the high-pressure oil source is converged into a large-flow high-pressure oil supply equipment through the high-pressure oil outlet pipe and the high-pressure main oil supply pipe, and the large-flow low-pressure return oil after use is then divided into multiple small return oils through the low-pressure main return oil pipe and returned to the hydraulic oil tanks of each module for recycling.

2. The modular powertrain test system according to claim 1, characterized in that: The cylinder body fixing structure includes a cylinder barrel mounting seat, a hydraulic cylinder mounting frame, a cylinder barrel support, a supporting guide rail, a cylinder rod mounting seat, a tension and compression sensor and a servo cylinder mounting seat; The cylinder mounting seat, cylinder support and servo cylinder mounting seat are respectively connected to the hydraulic cylinder mounting frame at a certain interval along the axial direction of the tested hydraulic cylinder; the servo cylinder mounting frame is arranged at one end of the hydraulic cylinder mounting frame away from the cylinder mounting seat; the support guide rail is connected between the servo cylinder mounting seat and the cylinder support along the axial direction of the tested hydraulic cylinder; the cylinder rod mounting seat is slidably connected with the support guide rail to ensure that the cylinder rod mounting seat moves linearly along the axial direction of the tested hydraulic cylinder; the tested hydraulic cylinder includes a cylinder pin, a cylinder and a cylinder rod pin; the cylinder pin is connected to the cylinder support, the cylinder is connected to the hydraulic cylinder mounting frame, and the cylinder rod pin is connected to the servo hydraulic cylinder through the cylinder rod mounting seat and the tension and compression sensor in turn; the tested hydraulic cylinder is coaxially arranged with the servo hydraulic cylinder, and the cylinder rod pin of the tested hydraulic cylinder is connected to the servo hydraulic cylinder through the cylinder rod mounting seat and the tension and compression sensor; the servo hydraulic cylinder is fixed to the hydraulic cylinder mounting frame through the servo cylinder mounting seat; a servo valve group and a displacement sensor are installed on the servo hydraulic cylinder; an accumulator group is designed on one side of the servo valve group.

3. The modular powertrain test system according to claim 2, characterized in that: Each modular hydraulic station mainly includes a chassis, on which a hydraulic oil tank and a hydraulic motor are placed side by side; the hydraulic oil tank is provided with an oil outlet, a pressure oil supply port and an oil return port; the oil outlet and the pressure oil supply port are connected in sequence with an oil suction port butterfly valve, a hydraulic pump, a pipeline filter and a pressure regulating valve group, the hydraulic pump is connected to the hydraulic motor, the hydraulic oil in the hydraulic oil tank flows into the hydraulic pump through the oil suction port butterfly valve, the hydraulic motor drives the hydraulic pump to pressurize the hydraulic oil into high-pressure oil, and the high-pressure oil enters the pressure regulating valve group after being filtered by the pipeline filter; the pressure regulating valve group includes a high-pressure port and an overflow port, wherein the high-pressure port serves as the pressure oil supply port, the overflow port is connected to one end of the radiator II after merging with the pipeline where the oil return port is located, and the other end of the radiator II is connected to the return oil filter.

4. The modular powertrain test system according to claim 3, characterized in that: The hydraulic oil tank is provided with a connecting oil port, and a plurality of modular hydraulic stations are arranged according to the on-site environment. According to the arrangement distance, adjacent modular hydraulic stations are connected in series through a module connecting oil pipe to connect the connecting oil ports of each modular hydraulic station.

5. The modular powertrain test system according to claim 4, characterized in that: The system also includes a circulating oil pipe, a circulating motor, a circulating hydraulic pump, a radiator I and an auxiliary oil return port; one end of the circulating hydraulic pump is connected to the circulating motor, and the other end is connected to the radiator I, and the radiator I is connected to the auxiliary oil return port on the top of another hydraulic oil tank through the circulating oil pipe.

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