A dht valve plate testing device

Abstract

The utility model provides a kind of DHT valve plate testing device, including test bench, test oil tank, product fixed plate, rotor driving mechanism, hydraulic test pipeline and control module.Test oil tank is located on test bench, and built-in liquid level sensor;Product fixed plate is used to install the valve plate to be measured;Rotor driving mechanism includes first motor and second motor, and two sets of rotors are driven respectively;Hydraulic test pipeline includes multiple detection branch, for detecting the pressure and flow of multiple oil liquid;Control module is electrically connected with motor and electromagnetic valve, for controlling rotational speed and current.The device integrates double-motor independent drive and multi-way hydraulic detection, realizes valve plate multi-working condition automatic test, improves test precision and efficiency.

Description

Technical Field

[0001] This utility model relates to the field of gearbox testing technology, and more specifically, to a DHT valve plate testing device. Background Technology

[0002] As a core hydraulic control component in the hybrid system of new energy vehicles, the DHT150 valve plate directly affects the power transmission efficiency and operational stability of the entire vehicle. This valve plate incorporates two sets of rotor structures and three solenoid valves with different functions, undertaking the precise distribution of lubricating oil to the engine and related shaft gears, the drive motor clutch and related shaft gears, and the cooling lubricating oil. During the performance testing phase, two independent motors drive the two sets of rotors respectively, while simultaneously precisely controlling the opening and closing states and timing of the three solenoid valves. This simulates the pressure and flow changes of the three lubricating oils under different operating conditions, verifying the hydraulic control accuracy and reliability of the valve plate.

[0003] Currently, there is no dedicated testing equipment for this valve plate in the industry, and companies mostly use general-purpose testing instruments to cobble together testing platforms. Such makeshift equipment suffers from poor compatibility and cumbersome parameter control. It not only requires frequent manual adjustments to motor speed and solenoid valve control parameters, but also struggles to achieve automated continuous testing under multiple operating conditions, resulting in long test cycles and low efficiency. Furthermore, manual operation is prone to introducing errors, and general-purpose equipment cannot accurately match the specific testing requirements of this valve plate, leading to insufficient test data accuracy. This makes it difficult to comprehensively identify potential product defects, ultimately affecting quality control in mass production and failing to meet the high quality standards required for core components in hybrid systems. Utility Model Content

[0004] This application primarily addresses the problems of poor compatibility of existing general-purpose testing equipment with DHT valve plates, cumbersome parameter adjustment, inability to achieve automated continuous testing under multiple operating conditions, and low testing accuracy and efficiency. To overcome the above-mentioned defects of the prior art, this application provides a DHT valve plate testing device.

[0005] This application provides a DHT valve plate testing device, comprising: The test stand is used to provide support. A test oil tank, which is installed on the test bench, is used to contain and supply test oil to the valve plate under test. A level sensor is installed inside the test oil tank. The product mounting plate is installed inside the test oil tank and is used to install and position the valve plate under test. The rotor drive mechanism includes a first motor and a second motor mounted on a test bench. The first motor is connected to the first set of rotors of the valve plate under test via a first drive shaft system. The second motor is connected to the second drive shaft system via a belt drive mechanism. The second drive shaft system is connected to the second set of rotors of the valve plate under test. The hydraulic test pipeline is connected to the test oil tank and the valve plate under test, and is used to form a test oil circuit and detect oil parameters. The control module is electrically connected to the first motor, the second motor, and the solenoid valve of the valve plate under test, and is used to control the rotor speed and the solenoid valve current.

[0006] Compared with existing technologies, the DHT valve plate testing device proposed in this application has the following advantages: It constructs a dedicated DHT valve plate testing device, integrating independent dual-motor drive, precise hydraulic detection, and centralized control functions, thus solving the problem of poor compatibility of existing general-purpose equipment. It achieves independent power supply for two sets of rotors and precise control of the solenoid valves, eliminating the need for frequent manual parameter adjustments, meeting the requirements for automated continuous testing under multiple operating conditions, shortening the testing cycle, and improving efficiency. It is specifically matched to the structural and functional requirements of the DHT valve plate, comprehensively detecting relevant parameters of three-channel lubricating oil, improving the accuracy of test data, assisting in the identification of potential defects, and ensuring effective product control in mass production.

[0007] In one possible implementation, the first motor is mounted on a first sliding adjustment assembly, which is configured to allow the first motor to move vertically and lock. The second motor is mounted on a second sliding adjustment assembly, which is configured to allow the second motor to move horizontally and lock. Compared with the prior art, the first motor can move vertically and the second motor can move horizontally, flexibly adapting to different installation positions or debugging requirements, and achieving precise docking between the motor and the valve plate rotor. After movement, it can be locked in place to ensure stability during the driving process, avoid test errors caused by connection deviations, and improve the operational reliability of the device.

[0008] In one possible implementation, both the first and second sliding adjustment components include a sliding guide rail mechanism and a cylinder locking mechanism for locking the motor onto the sliding guide rail mechanism. Compared with the prior art, the sliding guide rail mechanism provides smooth guidance for motor movement, ensuring the stability and accuracy of the adjustment process and reducing operational difficulty. The cylinder locking mechanism enables rapid and reliable locking of the motor, reducing operation time and errors compared to manual locking, further improving the debugging efficiency and operational stability of the device.

[0009] In one possible implementation, the hydraulic test pipeline includes: a first detection branch for detecting the pressure and flow rate of lubricating oil for the engine and related shaft gears; a second detection branch for detecting the pressure and flow rate of lubricating oil for the drive motor clutch and related shaft gears; and a third detection branch for detecting the pressure and flow rate of cooling lubricating oil. Compared with existing technologies, this method divides the lubricating oil into three independent detection branches based on its function, specifically detecting the pressure and flow rate of engine-related, drive motor clutch-related, and cooling lubricating oils, covering all hydraulic control functions of the valve plate. This enables simultaneous detection of multi-dimensional parameters, avoiding the incomplete detection problems of general-purpose equipment, and ensuring comprehensive verification of the valve plate's hydraulic control accuracy.

[0010] In one possible implementation, the first, second, and third detection branches are each equipped with an oil pressure sensor for detecting hydraulic pressure, a flow meter for detecting oil flow, and an on / off valve for switching the oil circuit on and off. Compared with existing technologies, the oil pressure sensor and flow meter enable real-time and accurate acquisition of oil parameters, providing accurate data support for valve plate performance evaluation and solving the problem of large errors in manual testing. The on / off valve can flexibly control the on / off of the oil circuit in each branch, facilitating the switching of different test conditions, improving the flexibility and convenience of test operations, and helping to achieve continuous testing under multiple conditions.

[0011] In one possible implementation, the first and second detection branches are each equipped with a flow resistance block, which is connected to the pipeline via a threaded detachable connection; the third detection branch is also equipped with a proportional valve. Compared with the prior art, the detachable flow resistance block supports replacement with different orifice sizes, can simulate different flow resistance conditions, expands the test scenario coverage of the device, and meets the performance verification requirements of the valve plate under complex working conditions. The proportional valve in the third detection branch can accurately control the cooling and lubricating oil parameters, further improving the accuracy of this type of oil test and ensuring the comprehensive verification of the valve plate's cooling and lubrication control function.

[0012] In one possible implementation, a torque sensor and a torque limiter are connected in series in both the first and second drive shaft systems. The drive shafts in both systems have a flat rectangular structure, fitted with a snap-fit ​​fixture that engages with the flat rectangular structure for insertion and locking during torque calibration. Compared to existing technologies, the torque sensor monitors shaft torque parameters in real time, providing data support for performance evaluation related to the valve plate rotor's operating load, thus enriching the testing dimensions. The torque limiter prevents shaft torque overload, protecting the valve plate under test and the device itself, and reducing the risk of equipment damage during testing. The flat rectangular structure, in conjunction with the snap-fit ​​fixture, simplifies torque calibration operations, ensuring the convenience and accuracy of the calibration process and improving the reliability of test data.

[0013] In one possible implementation, a storage tank is also included. The storage tank is connected to a test oil tank via an oil outlet pipe and an oil inlet pipe. An on / off ball valve is installed on the oil outlet pipe, and an oil pump is installed on the oil inlet pipe. The oil pump is used to transport the oil from the storage tank to the test oil tank. Compared with existing technologies, the storage tank enables the storage and recycling of test oil. The oil pump and on / off ball valve precisely control the oil supply, ensuring a stable liquid level in the test oil tank and preventing test interruptions due to insufficient oil. This facilitates oil replacement and maintenance, reduces oil waste during testing, and improves the economic efficiency and ease of maintenance of the device.

[0014] In one possible implementation, a mold temperature controller is also included, which is connected to the test oil tank. Compared with the prior art, the mold temperature controller can precisely control the oil temperature in the test oil tank, simulating the temperature environment of the oil in the valve plate during actual operation, making the test conditions more consistent with actual usage scenarios. This avoids test data deviations caused by oil temperature fluctuations, further improving the authenticity and reliability of test results, and ensuring that the valve plate meets performance standards under actual operating conditions.

[0015] In one possible implementation, an auxiliary oil pump is also included, which is connected to the test oil tank and is used to supply oil to the static valve plate under test. Compared with the prior art, the auxiliary oil pump supplies oil to the static valve plate under test, realizing hydraulic performance testing under static conditions, making up for the deficiency of existing equipment that can only test dynamic conditions, and improving the coverage of test scenarios. It can also identify oil distribution defects in the static state of the valve plate, further improving the comprehensiveness of the test and helping to improve the factory quality of valve plate products. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the three-dimensional structure of this application. Figure 1 ; Figure 2 This is a schematic diagram of the three-dimensional structure of this application. Figure 2 ; Figure 3 This is a schematic diagram of the planar structure of this application; Figure 4 for Figure 3 Partial illustration Figure 1 ; Figure 5 for Figure 3 Partial illustration Figure 2 ; Figure 6 for Figure 3 Partial illustration Figure 3 ; Explanation of reference numerals in the attached figures: 1. Test bench; 2. Test oil tank; 3. Product fixing plate; 4. Rotor drive mechanism; 41. First motor; 42. Second motor; 43. First drive shaft system; 44. Belt drive mechanism; 45. Second drive shaft system; 5. Control module; 6. First sliding adjustment component; 7. Second sliding adjustment component; 8. First detection branch; 9. Second detection branch; 10. Third detection branch; 11. Oil pressure sensor; 12. Flow meter; 13. On / off valve; 14. Flow resistance block; 15. Proportional valve; 16. Torque sensor; 17. Torque limiter; 18. Storage tank; 19. On / off ball valve; 20. Oil pump; 21. Mold temperature controller; 22. Auxiliary oil pump; 100. Valve plate to be tested. Detailed Implementation

[0017] First, those skilled in the art should understand that these embodiments are merely used to explain the technical principles of the embodiments of this application and are not intended to limit the scope of protection of the embodiments of this application. Those skilled in the art can make adjustments as needed to adapt to specific application scenarios.

[0018] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0019] In the embodiments of this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0020] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0021] See Figures 1 to 6 This application discloses a DHT valve plate testing device, including a test bench 1 and a test oil tank 2, a product fixing plate 3, a rotor drive mechanism 4, a hydraulic test pipeline, and a control module 5 installed on the test bench 1.

[0022] Test bench 1 adopts a rigid metal frame structure to provide overall support and installation foundation. Shock-absorbing pads can be installed at the bottom of test bench 1 to stabilize the device and reduce vibration interference.

[0023] The test oil tank 2 is fixedly installed on the test bench 1, with an opening at the top. The tank volume is designed according to the test requirements. A level sensor (such as a float-type or capacitive sensor) is installed inside the tank to monitor the oil level in real time, preventing insufficient or overflowing oil. The test oil tank 2 is connected to the oil inlet of the valve plate 100 under test, supplying test oil. A filter is installed at the oil inlet of the valve plate 100 under test to filter the oil entering the valve plate 100.

[0024] The product fixing plate 3 is installed inside the test oil tank 2. It is equipped with a positioning pin and a bolt locking mechanism for precise installation and positioning of the valve plate 100 under test, thereby ensuring that the valve plate 100 under test is aligned with the drive shaft system.

[0025] The rotor drive mechanism 4 includes a first motor 41 and a second motor 42 (both servo motors), which are mounted on the test bench 1. The first motor 41 is directly connected to the first set of rotors of the valve plate 100 under test via a first drive shaft system 43 (a combination of a transmission shaft and a coupling). The second motor 42 is connected to a second drive shaft system 45 via a belt drive mechanism 44 (a combination of a synchronous belt and a pulley), and the second drive shaft system 45 is then connected to the second set of rotors of the valve plate 100 under test. This mechanism provides independent driving force for the two sets of rotors, simulating the speed and torque during actual operation. The first drive shaft system 43 and the second drive shaft system 45 have the same structure.

[0026] The hydraulic test pipeline consists of multiple sets of oil pipes and connectors, connecting the test oil tank 2 and the valve plate to be tested 100 to form a closed test oil circuit for detecting oil parameters.

[0027] The control module 5 uses an industrial computer and is electrically connected to the first motor 41, the second motor 42, and the solenoid valve of the valve plate 100 under test via cables. The control module 5 sets test parameters (such as speed curve, solenoid valve current, and timing) through a software interface to achieve automated test control and data acquisition.

[0028] In this embodiment, the first motor 41 is mounted on the first sliding adjustment assembly 6, which includes a vertical sliding guide mechanism (such as a combination of a linear guide, a slider, and a lead screw) and a cylinder locking mechanism. The first motor 41 can move up and down along the guide to adjust the docking height with the first set of rotors of the valve plate 100 to be tested; after the position is determined, it is fixed by the cylinder locking mechanism to ensure driving stability.

[0029] The second motor 42 is mounted on the second sliding adjustment assembly 7, which includes a horizontal sliding guide rail mechanism (linear cylinder structure) and a cylinder locking mechanism. The second motor 42 can move horizontally along the guide rail to adjust its horizontal docking position with the second set of rotors of the valve plate 100 under test; after moving into position, it is fixed by the cylinder locking mechanism to prevent displacement during the test. The above-mentioned cylinder locking mechanism is a prior art cylinder-cooperating gripper structure.

[0030] In this embodiment, the hydraulic test pipeline includes a first test branch 8, a second test branch 9, and a third test branch 10. The first test branch 8 is connected to the engine lubricating oil port of the valve plate 100 under test, and is used to detect the pressure and flow rate of the lubricating oil in the engine and related shaft gears. The first test branch 8 is connected to the test oil tank 2, forming a complete test oil circuit. The second test branch 9 is connected to the drive motor clutch lubricating oil port of the valve plate 100 under test, and is used to detect the pressure and flow rate of the lubricating oil in the drive motor clutch and related shaft gears. The second test branch 9 is connected to the test oil tank 2, forming a complete test oil circuit. The inlet of the third test branch 10 is connected to the cooling lubricating oil outlet of the valve plate 100 under test, and the outlet of the third test branch 10 is connected to the cooling lubricating oil inlet of the valve plate 100 under test, used to detect the pressure and flow rate of the cooling lubricating oil.

[0031] In this embodiment, each of the first detection branch 8, the second detection branch 9, and the third detection branch 10 is equipped with an oil pressure sensor 11, a flow meter 12, and an on / off valve 13. The oil pressure sensor 11 monitors the oil circuit pressure in real time and transmits the signal to the control module 5. The flow meter 12 is used to measure the oil flow rate, and the data is uploaded to the control module 5 via a cable. The on / off valve 13 is controlled by the control module 5 to open and close, simulating the on / off conditions of the oil circuit or isolating a specific branch.

[0032] In this embodiment, flow resistance blocks 14 are detachably connected to the first detection branch 8 and the second detection branch 9 via threaded joints. Flow resistance blocks 14 are metal blocks with different orifice diameters and can be replaced according to testing requirements to simulate oil characteristics under different flow resistance conditions. An electronically controlled proportional valve 15 is installed on the third detection branch 10, and its opening is adjusted by the control module 5 to precisely control the flow rate and pressure of the cooling lubricating oil, achieving dynamic regulation.

[0033] In this embodiment, a torque sensor 16 and a torque limiter 17 are installed in series in both the first drive shaft system 43 and the second drive shaft system 45. The torque sensor 16 monitors the transmission torque in real time, and the torque limiter 17 automatically disconnects in case of overload, protecting the test product and equipment.

[0034] In this embodiment, a flat rectangular structure (i.e., a design with flat sides) is machined on the transmission shafts in the first drive shaft system 43 and the second drive shaft system 45, and a matching snap-fit ​​fixture (a U-shaped slot tool) is provided. During calibration, the snap-fit ​​fixture is inserted into the flat rectangular structure and the shaft system is locked to prevent rotation, which facilitates the zeroing or calibration of the torque sensor 16.

[0035] In this embodiment, the device further includes a storage tank 18. The storage tank 18 is separate from the test oil tank 2 and is used to store spare test oil. A level gauge is installed inside the storage tank 18. The storage tank 18 is connected to the test oil tank 2 via an oil outlet pipe and an oil inlet pipe. An on / off ball valve 19 is installed on the oil outlet pipe, and an oil pump 20 is installed on the oil inlet pipe. The on / off ball valve 19 is controlled by the control module 5 to open or close the oil flow. The oil pump 20, also controlled by the control module 5, pumps the oil from the storage tank 18 into the test oil tank 2 to replenish or replace the oil. A filter and a check valve are also installed on the oil inlet pipe.

[0036] In this embodiment, the device also includes a mold temperature controller 21. The mold temperature controller 21 is connected to the test oil tank 2 via inlet and outlet oil pipes. The mold temperature controller 21 contains a heater and a cooler to regulate the oil temperature. A temperature sensor is installed inside the test oil tank 2. The control module 5 sets the temperature parameters, and the mold temperature controller 21 automatically maintains the oil temperature to simulate different environmental conditions. Filters and one-way valves are installed on the inlet and outlet oil pipes.

[0037] In this embodiment, the device also includes an auxiliary oil pump 22. The auxiliary oil pump 22 is connected to the test oil tank 2 via an oil pipe and is a small hydraulic pump. When the valve plate 100 under test is in a static state (rotor does not rotate), the auxiliary oil pump 22 starts and supplies oil to the valve plate to test the static hydraulic performance such as solenoid valve response and leakage. A pressure sensor, a filter, and a manual pressure regulating valve are provided on the oil pipe.

[0038] The beneficial effects of this application include: I. Specifically designed for DHT valve plates, integrating dual-motor independent drive, precise hydraulic detection and centralized control functions, solving the problem of poor compatibility with general equipment, and adapting to the exclusive testing needs of valve plates.

[0039] Second, it enables independent drive of two sets of rotors and precise control of solenoid valves, eliminating the need for frequent manual parameter adjustments, supporting automated continuous testing under multiple operating conditions, and significantly shortening the testing cycle and improving testing efficiency.

[0040] Third, the pressure and flow rate of different functional lubricating oils are detected in three separate channels. Combined with components such as sensors and flow meters, the accuracy of test data is improved, which helps to comprehensively identify potential product defects and ensure quality control.

[0041] Fourth, it has functions such as motor position adjustment, flow resistance simulation, and oil temperature control, which expands the coverage of test scenarios, improves the comprehensiveness and realism of testing, and realizes oil recycling, reduces operating costs, and protects equipment safety.

[0042] In the description of the embodiments of this application, it should be noted that the terms "inner" and "outer" and other terms indicating direction or positional relationship are based on the direction or positional relationship shown in the drawings. This is only for the convenience of description and does not indicate or imply that the device or component must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this application.

[0043] In the description of this application, the references to terms such as "an embodiment," "some embodiments," "in this embodiment," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0044] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A DHT valve plate testing device, characterized in that, include: The test stand is used to provide support. A test oil tank, which is installed on the test bench, is used to contain and supply test oil to the valve plate under test. A level sensor is installed inside the test oil tank. The product mounting plate is installed inside the test oil tank and is used to install and position the valve plate under test. The rotor drive mechanism includes a first motor and a second motor mounted on a test bench. The first motor is connected to the first set of rotors of the valve plate under test via a first drive shaft system. The second motor is connected to the second drive shaft system via a belt drive mechanism. The second drive shaft system is connected to the second set of rotors of the valve plate under test. The hydraulic test pipeline is connected to the test oil tank and the valve plate under test, and is used to form a test oil circuit and detect oil parameters. The control module is electrically connected to the first motor, the second motor, and the solenoid valve of the valve plate under test, and is used to control the rotor speed and the solenoid valve current.

2. The DHT valve plate testing device according to claim 1, characterized in that, The first motor is mounted on a first sliding adjustment assembly, which is configured to allow the first motor to move and lock in a vertical direction; the second motor is mounted on a second sliding adjustment assembly, which is configured to allow the second motor to move and lock in a horizontal direction.

3. The DHT valve plate testing device according to claim 2, characterized in that, Both the first sliding adjustment assembly and the second sliding adjustment assembly include a sliding guide rail mechanism and a cylinder locking mechanism for locking the motor onto the sliding guide rail mechanism.

4. The DHT valve plate testing device according to claim 1, characterized in that, The hydraulic test pipeline includes: a first test branch for detecting the pressure and flow rate of lubricating oil for the engine and related shaft gears; a second test branch for detecting the pressure and flow rate of lubricating oil for the drive motor clutch and related shaft gears; and a third test branch for detecting the pressure and flow rate of cooling lubricating oil.

5. The DHT valve plate testing device according to claim 4, characterized in that, The first detection branch, the second detection branch, and the third detection branch are each equipped with an oil pressure sensor for detecting oil pressure, a flow meter for detecting oil flow, and an on / off valve for switching the oil circuit on and off.

6. The DHT valve plate testing device according to claim 5, characterized in that, The first and second detection branches are also equipped with flow resistance blocks, which are connected to the pipeline by a threaded detachable connection and can be replaced with flow resistance blocks with different orifice diameters; the third detection branch is also equipped with a proportional valve.

7. The DHT valve plate testing device according to claim 1, characterized in that, Both the first and second drive shaft systems are equipped with a torque sensor and a torque limiter connected in series. The drive shafts in the first and second drive shaft systems are provided with a flat rectangular structure and are equipped with a snap-fit ​​fixture that can cooperate with the flat rectangular structure, which is used to insert and lock the shaft system when calibrating the torque.

8. The DHT valve plate testing device according to claim 1, characterized in that, It also includes a storage tank, which is connected to the test oil tank through an oil outlet pipe and an oil inlet pipe. The oil outlet pipe is equipped with an on / off ball valve, and the oil inlet pipe is equipped with an oil pump. The oil pump is used to transport the oil in the storage tank to the test oil tank.

9. The DHT valve plate testing device according to claim 1, characterized in that, It also includes a mold temperature controller, which is connected to the test oil tank.

10. The DHT valve plate testing device according to claim 1, characterized in that, It also includes an auxiliary oil pump, which is connected to the test oil tank and is used to supply oil to the static test valve plate.

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