Wet clutch low temperature environment static hydraulic cycle durability test measurement device

Abstract

The present invention provides a static hydraulic cycle durability test measuring device for a wet clutch in a low temperature environment, comprising a test bench, a test cabin, a refrigeration device, an oil supply device and a control system, the wet clutch to be tested is fixedly installed in the test cabin, the oil supply device is used to provide oil of different pressures and temperatures for the wet clutch to be tested, the refrigeration device is connected to the test cabin and refrigerates the inner cavity of the test cabin; the oil supply device comprises an oil pressure sensor and an oil temperature sensor; the control system is respectively connected to the refrigeration device, the oil supply device, the oil pressure sensor and the oil temperature sensor signals. The device can measure the service life of the return spring and the piston seal under the reliable working state of the wet clutch in a low temperature environment, thereby optimizing the design of the wet clutch and improving the overall performance and service life of the wet clutch.

Description

Technical Field

[0001] The invention relates to the technical field of automobile component testing, and in particular to a static hydraulic cycle durability test measuring device for a wet clutch in a low temperature environment. Background Art

[0002] The wet clutch is the core component of the transmission system of energy-saving and new energy vehicles, and is mainly used for the intermittent control of the power of the vehicle transmission system. The wet clutch is mainly composed of friction plates, dual steel plates, pistons, return springs, piston seals, and clutch inner and outer hubs. The wet clutch is engaged and separated by controlling the oil pressure in the wet clutch piston cavity, thereby controlling the intermittent power of the transmission system. When the wet clutch is controlled to separate, the pressure in the wet clutch piston cavity is relieved, and the piston returns to its position under the action of the return spring. The friction pair will quickly separate and the power transmission will be cut off. In this process, the return spring and piston seal work repeatedly, which will cause durable failure problems. Especially in low temperature environments, when the performance of the return spring and piston seal materials is reduced, the failure problem is more prominent. Since the return spring and piston seal play an important role in the normal operation of the wet clutch, in order to ensure that the return spring and piston seal of the wet clutch can work reliably during the life cycle, it is necessary to carry out static hydraulic cycle durability tests in low temperature environments on the newly developed wet clutch.

[0003] At present, there is no report on the static hydraulic cycle durability test measurement device for wet clutch in low temperature environment. Therefore, designing a static hydraulic cycle durability test measurement device for wet clutch in low temperature environment has important engineering value for optimizing wet clutch design and improving wet clutch application reliability. Summary of the invention

[0004] In view of the deficiencies of the above-mentioned prior art, the main purpose of the present invention is to provide a static hydraulic cycle durability test measuring device for a wet clutch in a low-temperature environment, which can measure the service life of the return spring and the piston seal under the reliable working state of the wet clutch in a low-temperature environment, thereby optimizing the design of the wet clutch and improving the overall performance and life of the wet clutch.

[0005] The present invention provides a wet clutch low temperature environment static hydraulic cycle endurance test measuring device, comprising a test bench, the test bench is provided with a test cabin, a refrigeration device, an oil supply device and a control system, the wet clutch to be tested is fixedly installed in the test cabin, the oil supply device is used to provide the wet clutch to be tested with oil of different pressures and temperatures, the refrigeration device is connected with the test cabin and cools the cabin inner cavity of the test cabin;

[0006] The oil supply device includes an oil pressure sensor and an oil temperature sensor;

[0007] The control system is respectively connected to the refrigeration device, the oil supply device, the oil pressure sensor and the oil temperature sensor signals.

[0008] Compared with the prior art, the present invention simulates the working conditions of the hydraulic reciprocating action of the wet clutch return spring and piston seal of an actual vehicle in a low-temperature static environment by designing a simple device. Specifically, the refrigeration device in the device cools the inner cavity of the test cabin to ensure that the wet clutch to be tested is in a low-temperature environment. The oil supply device is used to provide oil of different pressures and temperatures to the wet clutch to be tested, simulating the hydraulic cycle durability test of the return spring and piston seal of the wet clutch at different pressurized oil temperatures, and collecting the oil pressure signal of the wet clutch through the oil pressure sensor and feeding it back to the control system for judgment. The pressure signal is used as the basis for judging its static hydraulic cycle durability failure. When the pressure signal of the wet clutch is abnormal during the test, the control system stops the hydraulic cycle durability test and outputs the result that the wet clutch has not passed the cycle durability test, and outputs the service life of the wet clutch, which is the cumulative number of engagements of the wet clutch calculated by the control system using the test-specific software; when the pressure signal of the wet clutch is not abnormal during the test, and the number of engagements of the wet clutch hydraulic cycle durability test reaches the design service life, the control system stops the hydraulic cycle durability test and outputs the result that the wet clutch has passed the cycle durability test, and outputs the service life of the wet clutch, which is the preset service life. The hydraulic cycle durability test measurement device has a simple structure, is easy to operate, and has reliable tests, providing very valuable reference opinions for optimizing the design of wet clutches and improving the reliability of wet clutch applications.

[0009] As a preferred solution of the present invention, the test chamber is provided with a first shaft support seat and a second shaft support seat which are spaced apart from each other, and a support shaft for installing the wet clutch to be tested is arranged between the first shaft support seat and the second shaft support seat. The wet clutch to be tested is supported by the first shaft support seat, the second shaft support seat and the support shaft, so that the wet clutch to be tested can be stably tested during the test.

[0010] Furthermore, an adjustment rail is fixedly provided at the bottom of the test chamber, and a slider is provided at the bottom of the first shaft support seat and the second shaft support seat, and the slider is slidably arranged on the adjustment rail, and the sliding direction of the slider is parallel to the axial direction of the support shaft. By designing the adjustment rail and the slider, the wet clutch to be tested can be adjusted and installed according to the requirements of different models during installation, ensuring the versatility of the test device.

[0011] As a preferred solution of the present invention, the oil supply device includes a hydraulic station and a mold temperature controller installed on the test bench, the hydraulic station and the mold temperature controller are connected through a first oil pipe, the mold temperature controller is connected to the wet clutch to be tested through a second oil pipe, and the oil temperature sensor and the oil pressure sensor are arranged at the oil outlet of the mold temperature controller. The hydraulic station is the total source of oil supply, the mold temperature controller is used to control the pressure oil temperature required for the test, the oil of the hydraulic station flows into the mold temperature controller through the first oil pipe, and after the temperature control of the mold temperature controller, it is transported to the wet clutch to be tested through the second oil pipe at the set oil temperature to supply oil for it.

[0012] Furthermore, the end of the support shaft is provided with an axial oil supply seat connected to the wet clutch to be tested, and the second oil pipe is connected to the axial oil supply seat. The wet clutch is installed on the support shaft according to the actual vehicle method, the support shaft is provided with an axial oil supply seat, and the relevant oil channels on the wet clutch are correspondingly connected to the oil channels on the axial oil supply seat according to the actual vehicle method, and the second oil pipe is connected to the axial oil supply seat to supply oil to the wet clutch to be tested.

[0013] Furthermore, the second oil pipe includes a hard connection oil pipe and a soft connection oil pipe, one end of the hard connection oil pipe is connected to the oil outlet of the mold temperature controller, the other end of the hard connection oil pipe is connected to one end of the soft connection oil pipe, the hard connection oil pipe is located outside the test cabin, the soft connection oil pipe is located inside the test cabin, and the other end of the soft connection oil pipe is connected to the shaft center oil supply seat. Through the oil circuit connection, the hydraulic station can stably supply oil to the wet clutch.

[0014] As a preferred embodiment of the present invention, the refrigeration device comprises a low-temperature refrigeration station installed on the test bench, and the low-temperature refrigeration station is connected to the test cabin through a cold air delivery pipe.

[0015] As a preferred solution of the present invention, the control system includes a computer, a data collector and a hydraulic system controller. The data collector, the hydraulic system controller, the mold temperature controller and the low-temperature refrigeration station are respectively connected to the computer signal, the hydraulic system controller is connected to the hydraulic station signal, the oil temperature sensor and the oil pressure sensor are respectively arranged on the mold temperature controller, and the oil temperature sensor and the oil pressure sensor are respectively connected to the data collector signal. The intelligent control of the hydraulic cycle durability test measuring device is realized by the control system, and the oil temperature signal and oil pressure signal collected by the data collector are transmitted to the computer for processing. The computer uses the temperature and pressure of the oil as feedback control signals to adjust the oil pressure controlled by the hydraulic station and the oil temperature controlled by the mold temperature controller, thereby ensuring the required oil pressure and temperature during the hydraulic cycle durability test. At the same time, the oil pressure signal can be used as a basis for judging the static hydraulic cycle durability failure of the wet clutch to be tested. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0017] Figure 2 It is a schematic diagram of data acquisition signals in the present invention.

[0018] Description of reference numerals:

[0019] 1. Bench mounting base; 2. Equipment mounting base; 3. Test cabin; 4. Adjustment slide rail; 5. First shaft support seat; 6. Support shaft; 7. Wet clutch to be tested; 8. Second shaft support seat; 9. Axis oil supply seat; 10. Soft-connected oil pipe; 11. Hard-connected oil pipe; 12. Mold temperature controller; 13. Hydraulic station; 14. Data acquisition device; 15. Hydraulic system controller; 16. Computer; 17. Low-temperature refrigeration station; 18. Cold air delivery pipe. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] like Figure 1 and Figure 2 As shown, the present invention shows a static hydraulic cycle durability test measuring device for a wet clutch in a low temperature environment, comprising a test bench, on which a test cabin 3, a refrigeration device, an oil supply device and a control system are provided.

[0022] Specifically, the test bench includes a bench mounting base 1, on which an equipment mounting base 2 is provided, a test cabin 3 is installed on the equipment mounting base 2, a wet clutch 7 to be tested is fixed in the test cabin 3, the test cabin 3 is filled with engine oil, and the wet clutch is immersed in the oil.

[0023] The test chamber 3 is provided with a first shaft support seat 5 and a second shaft support seat 8 which are spaced apart from each other, and a support shaft 6 for installing the wet clutch 7 to be tested is arranged between the first shaft support seat 5 and the second shaft support seat 8. The wet clutch 7 to be tested is supported by the first shaft support seat 5, the second shaft support seat 8 and the support shaft 6, so that the wet clutch 7 to be tested can be tested stably during the test.

[0024] An adjustment rail 4 is fixedly provided at the bottom of the test chamber 3, and a slider is provided at the bottom of the first shaft support seat 5 and the second shaft support seat 8. The slider is slidably arranged on the adjustment rail 4, and the sliding direction of the slider is parallel to the axial direction of the support shaft 6. By designing the adjustment rail 4 and the slider, the wet clutch 7 to be tested can be adjusted and installed according to the requirements of different models during installation, ensuring the versatility of the test device.

[0025] The refrigeration device includes a low-temperature refrigeration station 17 installed on the bench mounting base 1. The low-temperature refrigeration station 17 is connected to the test chamber 3 through a cold air delivery pipe 18 to provide refrigeration cold air for the test chamber 3 to ensure that the wet clutch 7 to be tested is always in a low-temperature environment.

[0026] The end of the support shaft 6 in the test chamber 3 is connected to an oil supply device, which is used to provide oil of different pressures and temperatures to the wet clutch 7 to be tested.

[0027] Specifically, the oil supply device includes a hydraulic station 13 and a mold temperature controller 12 installed on the test bench. The hydraulic station 13 and the mold temperature controller 12 are connected through a first oil pipe, and the mold temperature controller 12 is connected to the wet clutch 7 to be tested through a second oil pipe. The oil temperature sensor and the oil pressure sensor are arranged at the oil outlet of the mold temperature controller 12. The hydraulic station 13 is the total source of oil supply, and the mold temperature controller 12 is used to control the pressure oil temperature required for the test. The oil of the hydraulic station 13 flows into the mold temperature controller 12 through the first oil pipe, and after the temperature control of the mold temperature controller 12, it is transported to the wet clutch 7 to be tested through the second oil pipe at a set oil temperature to supply oil to it.

[0028] The end of the support shaft 6 is provided with an axial oil supply seat 9 connected to the wet clutch 7 to be tested, and the second oil pipe is connected to the axial oil supply seat 9. The wet clutch is installed on the support shaft 6 according to the actual vehicle method, the support shaft 6 is provided with an axial oil supply seat 9, and the relevant oil channels on the wet clutch are correspondingly connected to the oil channels on the axial oil supply seat 9 according to the actual vehicle method, and the second oil pipe is connected to the axial oil supply seat 9 to supply oil to the wet clutch 7 to be tested.

[0029] The second oil pipe includes a hard connection oil pipe 11 and a soft connection oil pipe 10, one end of the hard connection oil pipe 11 is connected to the oil outlet of the mold temperature controller 12, the other end of the hard connection oil pipe 11 is connected to one end of the soft connection oil pipe 10, the hard connection oil pipe 11 is located outside the test chamber 3, the soft connection oil pipe 10 is located inside the test chamber 3, and the other end of the soft connection oil pipe 10 is connected to the shaft center oil supply seat 9. Through the oil circuit connection, the hydraulic station 13 can stably supply oil to the wet clutch, ensuring that the pressure oil output by the hydraulic station 13 enters the wet clutch after temperature control by the mold temperature controller 12, and reaches the wet clutch piston chamber to realize the separation and combination control of the wet clutch.

[0030] In addition, the oil supply device also includes an oil pressure sensor and an oil temperature sensor. The oil pressure sensor is used to monitor the oil pressure signal of the pressure oil provided by the hydraulic station 13, and the oil temperature sensor is used to monitor the oil temperature signal of the pressure oil controlled by the mold temperature machine 12.

[0031] The control system includes a computer 16, a data collector 14 and a hydraulic system controller 15. The data collector 14, the hydraulic system controller 15, the mold temperature controller 12 and the low-temperature refrigeration station 17 are respectively connected to the computer 16 signals. The hydraulic system controller 15 is connected to the hydraulic station 13 signals. The oil temperature sensor and the oil pressure sensor are respectively arranged on the mold temperature controller 12, and the oil temperature sensor and the oil pressure sensor are respectively connected to the data collector 14 signals.

[0032] The computer 16 controls the hydraulic station 13 to output the pressure oil required for the hydraulic cycle endurance test through the hydraulic system controller 15; the computer 16 controls the mold temperature controller 12 to operate through communication to achieve temperature control of the pressure oil required for the test; the computer 16 controls the low-temperature refrigeration station 17 to output low-temperature cold air through communication, and the cold air delivery pipe 18 delivers the low-temperature cold air output by the low-temperature refrigeration station 17 into the test chamber 3 to achieve simulation of the low-temperature environment of the wet clutch 7 to be tested.

[0033] The data collector 14 collects the temperature and pressure of the pressure oil at the outlet of the mold temperature controller 12 in real time during the test, and inputs the data into the computer 16 for processing, display and storage.

[0034] The control system is used to realize intelligent control of the hydraulic cycle durability test measuring device, and the oil temperature signal and oil pressure signal collected by the data acquisition device 14 are transmitted to the computer 16 for processing. The computer 16 uses the temperature and pressure of the oil as feedback control signals to adjust the oil pressure controlled by the hydraulic station 13 and the oil temperature controlled by the mold temperature controller 12, thereby ensuring the required oil pressure and temperature during the hydraulic cycle durability test. At the same time, the oil pressure signal can be used as a basis for judging the dynamic hydraulic cycle durability failure of the wet clutch 7 to be tested.

[0035] The present invention simulates the working condition of the hydraulic reciprocating action of the wet clutch return spring and piston seal in a low-temperature static environment of an actual vehicle by designing a simple device. Specifically, the refrigeration device in the device cools the inner cavity of the test cabin 3 to ensure that the wet clutch 7 to be tested is in a low-temperature environment. The oil supply device is used to provide oil with different pressures and temperatures to the wet clutch 7 to be tested, simulating the hydraulic cycle durability test of the return spring and piston seal of the wet clutch at different pressurized oil temperatures, and collecting the oil pressure signal of the wet clutch through the oil pressure sensor and feeding it back to the control system for judgment. The pressure signal is used as the basis for judging its static hydraulic cycle durability failure. When the pressure signal of the wet clutch is abnormal during the test, the control system stops the static hydraulic cycle durability test and outputs the result that the wet clutch has not passed the static hydraulic cycle durability test in a low-temperature environment, and outputs the service life of the wet clutch at the same time, and its service life is the cumulative number of engagements of the wet clutch calculated by the control system using the test-specific software; when the pressure signal of the wet clutch is not abnormal during the test, and the number of engagements of the wet clutch hydraulic cycle durability test reaches the design service life, the control system stops the static hydraulic cycle durability test and outputs the result that the wet clutch has passed the static hydraulic cycle durability test in a low-temperature environment, and outputs the service life of the wet clutch at the same time, and its service life is the preset service life. The hydraulic cycle durability test measurement device has a simple structure, is easy to operate, and has reliable tests, and provides very valuable reference opinions for optimizing the design of the wet clutch and improving the reliability of the wet clutch application.

[0036] In summary, the durability data of the wet clutch return spring and piston seal measured by the test measurement device of the present invention are accurate and reliable, and the pressure, temperature and other changes in the static hydraulic cycle durability test process of the wet clutch can be recorded throughout the entire process. The measurement results of the present invention are of great significance for optimizing the design of the wet clutch.

[0037] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, inside, outside...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0038] In the present invention, unless otherwise clearly specified and limited, the terms "installation", "connection", "fixation" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] In addition, in the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes, and do not specifically refer to the order or sequence, nor are they used to limit the present invention. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0040] The above are only preferred embodiments of the present invention, and are not intended to limit the implementation methods and protection scope of the present invention. Those skilled in the art should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A wet clutch low temperature environment static hydraulic cycle durability test measuring device, including a test bench, characterized in that: The test bench is provided with a test cabin (3), a refrigeration device, an oil supply device and a control system; the wet clutch (7) to be tested is fixedly installed in the test cabin (3); the oil supply device is used to provide oil with different pressures and temperatures for the wet clutch (7) to be tested; the refrigeration device is connected to the test cabin (3) and cools the inner cavity of the cabin of the test cabin (3); The oil supply device includes an oil pressure sensor and an oil temperature sensor; The control system is respectively connected to the refrigeration device, the oil supply device, the oil pressure sensor and the oil temperature sensor signal; The test chamber (3) is provided with a first shaft support seat (5) and a second shaft support seat (8) which are arranged at intervals, and a support shaft (6) for installing the wet clutch (7) to be tested is arranged between the first shaft support seat (5) and the second shaft support seat (8); an adjustment slide rail (4) is fixedly arranged at the bottom of the test chamber (3), and a slider is arranged at the bottom of the first shaft support seat (5) and the second shaft support seat (8), and the slider is slidably arranged on the adjustment slide rail (4), and the sliding direction of the slider is parallel to the axial direction of the support shaft (6); the oil supply device comprises a hydraulic station (13) and a mold temperature controller (12) installed on the test bench, the hydraulic station (13) and the mold temperature controller (12) are connected to each other through a first oil pipe, and the mold temperature controller (12) is connected to the wet clutch (7) to be tested through a second oil pipe, and the oil temperature sensor and the oil pressure sensor are arranged at the oil outlet of the mold temperature controller (12).

2. The wet clutch low temperature environment static hydraulic cycle durability test measuring device according to claim 1, characterized in that: An axial oil supply seat (9) connected to the wet clutch (7) to be tested is provided at the end of the support shaft (6), and the second oil pipe is connected to the axial oil supply seat (9).

3. The wet clutch low temperature environment static hydraulic cycle durability test measuring device according to claim 2, characterized in that: The second oil pipe comprises a hard-connected oil pipe (11) and a soft-connected oil pipe (10), one end of the hard-connected oil pipe (11) is connected to the oil outlet of the mold temperature controller (12), and the other end of the hard-connected oil pipe (11) is connected to one end of the soft-connected oil pipe (10), the hard-connected oil pipe (11) is located outside the test chamber (3), the soft-connected oil pipe (10) is located inside the test chamber (3), and the other end of the soft-connected oil pipe (10) is connected to the axial oil supply seat (9).

4. The wet clutch low temperature environment static hydraulic cycle durability test measuring device according to claim 3, characterized in that: The refrigeration device comprises a low-temperature refrigeration station (17) installed on the test bench, and the low-temperature refrigeration station (17) is connected to the test chamber (3) through a cold air delivery pipe (18).

5. The wet clutch low temperature environment static hydraulic cycle durability test measuring device according to claim 4, characterized in that: The control system comprises a computer (16), a data acquisition device (14) and a hydraulic system controller (15); the data acquisition device (14), the hydraulic system controller (15), the mold temperature controller (12) and the low-temperature refrigeration station (17) are respectively connected to the computer (16) by signal; the hydraulic system controller (15) is connected to the hydraulic station (13) by signal; the oil temperature sensor and the oil pressure sensor are respectively arranged on the mold temperature controller (12); and the oil temperature sensor and the oil pressure sensor are respectively connected to the data acquisition device (14) by signal.

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