CN107884186B - Clutch assembly fatigue test system and method - Google Patents
Clutch assembly fatigue test system and method Download PDFInfo
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- CN107884186B CN107884186B CN201711319835.3A CN201711319835A CN107884186B CN 107884186 B CN107884186 B CN 107884186B CN 201711319835 A CN201711319835 A CN 201711319835A CN 107884186 B CN107884186 B CN 107884186B
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- 238000009661 fatigue test Methods 0.000 title claims abstract description 36
- 238000000034 method Methods 0.000 title abstract description 11
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 43
- 238000012360 testing method Methods 0.000 claims abstract description 41
- 230000007246 mechanism Effects 0.000 claims abstract description 31
- 239000003921 oil Substances 0.000 claims description 31
- 230000001105 regulatory effect Effects 0.000 claims description 29
- 230000005540 biological transmission Effects 0.000 claims description 14
- 238000010998 test method Methods 0.000 claims description 9
- 238000005461 lubrication Methods 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 2
- 230000006837 decompression Effects 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 230000000712 assembly Effects 0.000 description 4
- 238000000429 assembly Methods 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000002159 abnormal effect Effects 0.000 description 3
- 238000012806 monitoring device Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000013459 approach Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000002679 ablation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000012956 testing procedure Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
- G01M13/02—Gearings; Transmission mechanisms
- G01M13/022—Power-transmitting couplings or clutches
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- General Physics & Mathematics (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The invention relates to the field of automobile manufacturing, and particularly discloses a fatigue test system and method for a clutch assembly, wherein the test system comprises a driving mechanism, a clutch assembly and a clutch assembly driving mechanism, wherein the driving mechanism is connected with the clutch assembly and is used for driving the clutch assembly to rotate, and the output rotating speed of the clutch assembly is adjustable; the hydraulic device is used for driving a piston in the clutch assembly to compress, the output hydraulic pressure of the hydraulic device is adjustable, and the hydraulic device comprises a first pressure sensor for testing the pressure of hydraulic oil for driving the piston to compress. According to the invention, the piston of the clutch assembly is driven to compress by the hydraulic device, the driving mechanism drives the clutch assembly to rotate, and the actual working state of the clutch assembly is simulated, so that the fatigue of the clutch assembly is integrally tested; and comparing the pressure value fed back by the first pressure sensor with a preset value to judge whether each part in the clutch assembly is unqualified in fatigue test.
Description
Technical Field
The invention relates to the technical field of automobile manufacturing, in particular to a fatigue test system and method for a clutch assembly.
Background
The clutch assembly is one of important components of the automobile, has very close influence on the control stability, riding comfort and the like of the automobile, has been developed for centuries, and the functions and the action effects of the clutch assembly are continuously improved and perfected.
The clutch assembly is a key component for realizing a gear shifting function of an automobile, if the clutch assembly fails, the gear shifting smoothness of the transmission is affected if the clutch assembly is light, the transmission cannot shift due to abnormal sound, and the transmission cannot shift due to heavy weight. The fatigue life of the clutch assembly will directly affect the life of the transmission, so that fatigue life testing is essential during design and development of the clutch assembly.
Therefore, a series of test tests must be performed on a clutch prior to its actual application to a vehicle. The test for the clutch specifically comprises the test for each part of the clutch assembly; the parts of the clutch assembly comprise friction plates, diaphragm springs, pistons, release bearings and the like.
However, in the automobile development and manufacturing industry, the testing of each part of the clutch assembly has been generally performed separately by testing equipment having different structures, so that the existing testing procedures are complicated and have high cost.
Disclosure of Invention
One object of the present invention is to: the fatigue test system for the clutch assembly is provided to solve the problems of complex test procedures and high test cost of the clutch in the prior art.
Another object of the invention is: a fatigue testing method for a clutch assembly is provided.
In one aspect, the invention provides a fatigue testing system for a clutch assembly, wherein a spring for driving the piston to return is arranged in a piston of the clutch assembly, and the fatigue testing system comprises:
the hydraulic device comprises a hydraulic oil tank, a hydraulic pump and a first pressure regulating valve which are sequentially connected, the first pressure regulating valve is connected with a first end of a three-way valve, a second end of the three-way valve is connected with a piston of the clutch assembly through a pressurizing pipeline and is used for driving the piston to compress, a third end of the three-way valve is connected with the hydraulic oil tank through an oil return pipeline, and the first end of the three-way valve is communicated with a second end of the three-way valve or the second end of the three-way valve is communicated with the third end of the three-way valve; the pressurizing pipeline is also connected with a first pressure sensor;
the reset mechanism is used for driving the piston to return;
and the driving mechanism is connected with the clutch assembly and can drive the clutch assembly to rotate, and the output rotating speed of the driving mechanism is adjustable.
Preferably, the clutch assembly further comprises a bearing seat connected with a release bearing in the clutch assembly, wherein a pressurizing oil port is arranged on the bearing seat, and a third end of the three-way valve is connected with the pressurizing oil port through a pressurizing pipeline.
Preferably, the hydraulic device further includes a second pressure sensor and a first temperature sensor for testing the pressure and temperature of the hydraulic pump output port, respectively.
Preferably, the hydraulic device further includes a second temperature sensor and a heater both disposed in the hydraulic oil tank.
Preferably, the output end of the hydraulic pump is connected with a lubrication oil port of the clutch assembly through a second pressure regulating valve.
Preferably, the return mechanism comprises a solenoid valve connected with the output end of the hydraulic pump and a hydraulic cylinder connected with the solenoid valve, wherein the output end of the hydraulic cylinder is connected with the piston and used for driving the piston to return.
Preferably, the driving mechanism comprises a high-speed motor, a transmission component connected with the high-speed motor and the clutch assembly, a frequency converter connected with the high-speed motor, and a rotation speed sensor for testing the rotation speed of the clutch assembly.
Preferably, the transmission assembly comprises a spline shaft connected with the input end of the clutch assembly, a first toothed belt pulley arranged on the spline shaft, a second toothed belt pulley arranged on the output shaft of the high-speed motor, and a toothed belt connected with the first toothed belt pulley and the second toothed belt pulley.
Preferably, an alarm device is also included.
In another aspect, the present invention provides a method for testing fatigue of a clutch assembly, which is applicable to the fatigue testing system of a clutch assembly in any of the above schemes, and includes:
s10: cooling the clutch assembly to enable the surface and the interior of the clutch assembly to reach-20 ℃ to-40 ℃;
s20: the hydraulic pump is pressurized, and the pressure is regulated to P through the first pressure regulating valve;
s30: the driving mechanism drives the clutch assembly to operate at a rotating speed V;
s40: the first end and the second end of the three-way valve are communicated, the second end and the third end of the three-way valve are closed, the duration time T1 is long, the hydraulic oil drives the piston to compress, and the T1 is the pressurization time;
s50: the first end and the second end of the three-way valve are closed, the second end of the three-way valve is communicated with the third end, and the duration time T2 are decompression time;
s60: repeating steps S40 and S50 in time T, if the value of the first pressure sensor is in a preset range in time T, testing the fatigue of the clutch assembly to be qualified, and if the value fluctuation of the first pressure sensor exceeds the preset range, testing the fatigue of the clutch assembly to be unqualified, and stopping testing.
The beneficial effects of the invention are as follows: the clutch assembly is driven to rotate through the driving mechanism, the piston of the clutch assembly is driven to compress through the hydraulic device, the piston is driven to return through the spring and the reset mechanism in the clutch assembly, the temperature of hydraulic oil is regulated through the heater, the first temperature sensor and the second temperature sensor, and the temperature of the hydraulic oil is ensured to be between 110 ℃ and 130 ℃, so that the actual working state and the working environment of the clutch assembly can be simulated, the fatigue test result is more objective and real, and the integral fatigue test of the clutch assembly is realized; and the pressure value fed back by the first pressure sensor is compared with a preset range, so that whether the fatigue test failure condition occurs to each part in the clutch assembly can be reflected, and the problems of complex test program and high test cost of the clutch assembly in the prior art can be effectively solved through the arrangement.
Drawings
FIG. 1 is a schematic diagram of a driving mechanism of a fatigue testing system for a clutch assembly according to an embodiment of the present invention;
fig. 2 is a schematic structural view of a hydraulic device and a return mechanism of a fatigue test system for a clutch assembly according to an embodiment of the present invention.
In the figure:
1. a hydraulic device; 101. a hydraulic oil tank; 102. a hydraulic pump; 103. a pressurizing electromagnetic valve; 104. a first pressure regulating valve; 105. a three-way valve; 106. a first pressure sensor; 107. a second pressure sensor; 108. a third pressure sensor; 109. a first temperature sensor; 110. a second temperature sensor; 111. a heater; 112. a hydraulic gauge; 113. a second pressure regulating valve; 114. an oil return pipeline; 115. a pressurizing pipeline; 116. a lubrication line;
2. a reset mechanism; 201. an electromagnetic valve; 202. a hydraulic cylinder;
3. a bearing seat; 301. a pressurizing oil port;
4. a clutch assembly;
5. a driving mechanism; 51. a high-speed motor; 52. a frequency converter; 53. a transmission assembly; 531. a spline shaft; 532. a first toothed pulley; 533. a second toothed pulley; 534. toothed belts; 54. a rotation speed sensor.
Detailed Description
The technical scheme of the invention is further described below by the specific embodiments with reference to the accompanying drawings.
The embodiment provides a fatigue test system for a clutch assembly, as shown in fig. 1-2, which comprises a driving mechanism 5, a hydraulic device 1, an electric control device (not shown in the drawing), a reset mechanism 2 and an alarm device (not shown in the drawing), wherein the driving mechanism 5 and the hydraulic device 1 are both arranged on a workbench (not shown in the drawing).
As shown in fig. 1, the driving mechanism 5 includes a high-speed motor 51, a frequency converter 52, a transmission assembly 53, and a rotation speed sensor 54, the transmission assembly 53 includes a spline shaft 531, a first toothed pulley 532, a second toothed pulley 533, and a toothed belt 534, an input end of the clutch assembly 4 is connected to the spline shaft 531, the first toothed pulley 532 is mounted on the spline shaft 531, the second toothed pulley 533 is mounted on an output shaft of the high-speed motor 51, the first toothed pulley 532 and the second toothed pulley 533 are connected through a toothed belt 534, the frequency converter 52 is connected to the high-speed motor 51 and an electric control device, the electric control device adjusts the rotation speed of the high-speed motor 51 through the frequency converter 52, the rotation speed sensor 54 is mounted on the input end of the clutch assembly 4 or the spline shaft 531, and is connected to the electric control device for testing the actual rotation speed of the clutch assembly 4, in this embodiment, the rotation speed of the clutch assembly 4 is preset on a memory of the electric control device, the electric control device drives the clutch assembly 4 through the frequency converter 52 to set the rotation speed, and at the same time, whether the preset actual rotation speed of the clutch assembly 4 can be fed back to the electric control device through the rotation speed sensor 54.
As shown in fig. 2, the release bearing of the clutch assembly 4 is connected with the bearing seat 3, the bearing seat 3 is provided with a pressurizing oil port 301, and the pressurizing oil port 301 is communicated with the cavity of the piston in the clutch assembly 4 through the internal oil path of the bearing seat 3 and the internal oil path in the clutch assembly 4. In this embodiment, the pressurization oil port 301 is disposed on the bearing seat 3 and is connected with the pressurization pipeline 115, so that the direct connection between the pressurization pipeline 115 and the clutch assembly 4 is avoided, and further, the situation that the pressurization pipeline 115 follows the clutch assembly 4 to integrally rotate and the pressurization pipeline 115 and the clutch assembly 4 are wound together when the clutch assembly 4 rotates is avoided.
As shown in fig. 2, the hydraulic device 1 includes a hydraulic tank 101, a hydraulic pump 102, and a pressurizing solenoid valve 103, a first pressure regulating valve 104, a three-way valve 105, a first pressure sensor 106, a second pressure sensor 107, a third pressure sensor 108, a first temperature sensor 109, a second temperature sensor 110, and a heater 111, all of which are connected to an electronic control device.
The input end of the hydraulic pump 102 is connected with the hydraulic oil tank 101, the output end is connected with the first pressure regulating valve 104, the first end of the three-way valve 105 is connected with the first pressure regulating valve 104, the third end is communicated with the hydraulic oil tank 101 through an oil return pipeline 114, and the second end of the three-way valve 105 is connected with a pressurizing oil port 301 on the bearing seat 3 through a pressurizing pipeline 115. It should be noted that, in the present embodiment, the three-way valve 105 is preferably a two-position three-way solenoid valve, so that when the three-way valve 105 is connected to the first pressure regulating valve 104 and the pressurizing pipe 115, then the three-way valve 105 and the oil return pipe 114 are disconnected, and in particular, when the first end and the second end of the three-way valve 105 are connected, the second end and the third end are closed, and hydraulic oil can enter the piston cavity and drive the piston to compress under the driving of the hydraulic pump 102. When the three-way valve 105 is disconnected from the first pressure regulating valve 104, then the three-way valve 105 and the oil return pipeline 114 are in a communication state, and at this time, the unloading of the hydraulic oil can be realized. Specifically, at this time, the first end and the second end of the three-way valve 105 are closed, the second end of the three-way valve 105 is communicated with the third end, the oil return pipeline 114 is communicated with the pressurizing pipeline 115, the hydraulic pressure acting on the piston is released, the piston returns under the action of the spring in the piston, and the hydraulic oil in the piston cavity sequentially enters the hydraulic oil tank 101 through the pressurizing pipeline 115 and the oil return pipeline 114.
The first pressure regulating valve 104 can regulate the pressure of the hydraulic oil entering the three-way valve 105, and a required pressure value can be set on a memory of the electric control device in advance, and in the fatigue test, the electric control device automatically controls the first pressure regulating valve 104 to regulate the pressure of the hydraulic oil to the preset pressure value.
The pressurizing solenoid valve 103 is connected to the hydraulic pump 102, the pressurizing solenoid valve 103 can control the hydraulic pump 102 to pressurize, in this embodiment, the hydraulic pump 102 adopts a pneumatic hydraulic pump, the pressurizing solenoid valve 103 controls the connection and disconnection of the power gas of the pneumatic hydraulic pump, and the pressurizing solenoid valve 103 controls the pressurizing of the hydraulic pump 102, however, an electric pump may also be adopted for the hydraulic pump 102.
The first pressure sensor 106 is used for testing the oil pressure in the pressurized pipeline 115, when the tested clutch assembly 4 is qualified in fatigue, the pressure value fed back to the electronic control device by the first pressure sensor 106 can be in a normal range, and when the tested clutch assembly 4 is unqualified in fatigue, for example: when the piston in the clutch assembly 4 breaks, resulting in leakage of the hydraulic oil being loaded, the pressure of the first pressure sensor 106 may significantly decrease beyond the normal range described above. Thus, when the fatigue test of the clutch assembly 4 is performed, whether the fatigue test of the clutch assembly 4 is failed can be judged by whether the pressure value fed back to the electronic control device by the first pressure sensor 106 exceeds a predetermined range. It should be noted that the predetermined range refers to a range of pressure value fluctuation that is set in advance on the memory of the electronic control device before the start of the test and that corresponds to the model of the clutch assembly 4 under test and the first pressure sensor 106 under the current test conditions.
The second pressure sensor 107 and the first temperature sensor 109 are both disposed at the output port of the hydraulic pump 102, and are respectively used for testing the pressure and the temperature of the hydraulic oil pressurized by the hydraulic pump 102, the third pressure sensor 108, the second temperature sensor 110 and the heater 111 are all disposed in the hydraulic tank 101, the third pressure sensor 108 and the second temperature sensor 110 are respectively used for testing the pressure and the temperature of the hydraulic oil in the hydraulic tank 101, and in the fatigue test process, the temperature of the hydraulic oil only simulates the actual temperature in the vehicle operation process, so that the objectivity of the test result can be ensured, and in the test process, the temperature of the hydraulic oil needs to be controlled to be 110-130 ℃ according to the actual operation state of the vehicle, in the embodiment, when the temperature value fed back by the second temperature sensor 110 or the first temperature sensor 109 gradually decreases and approaches 110 ℃, the electric control device automatically controls the heater 111 to heat the hydraulic oil in the hydraulic tank 101, and when the temperature value fed back by the first temperature sensor 109 or the second temperature sensor 110 increases to approach 130 ℃, the electric control device automatically controls the heater 111 to stop heating, so that the temperature of the hydraulic oil can be controlled to be at 110-130 ℃. In this embodiment, the electronic control device may determine the pressure boost of the hydraulic pump 102 through the difference between the pressure values measured by the second pressure sensor 107 and the third pressure sensor 108, and determine the pressure value to be adjusted by the first pressure regulating valve 104 through the difference between the pressure value measured by the second pressure sensor 107 and the preset pressure value of the pressurizing oil port 301.
Preferably, the hydraulic device 1 further comprises a hydraulic gauge 112, and the hydraulic gauge 112 is installed on the connecting pipeline between the first pressure regulating valve 104 and the three-way valve 105, so that an operator can conveniently directly observe the actual value of the pressurized oil pressure through the hydraulic gauge 112.
Preferably, the hydraulic pump 102 in this embodiment can simultaneously provide hydraulic drive for a plurality of clutch assemblies 4 with the same or different types, so as to improve the fatigue detection efficiency of the clutch assemblies 4, and save the input quantity of equipment and the occupied area of the field. Specifically, the number of clutch assemblies 4 that can be driven simultaneously may be determined based on the pressurized oil pressure required for fatigue testing of the clutch assemblies 4 and the particular model of the hydraulic pump 102.
Preferably, the hydraulic device 1 further comprises a second pressure regulating valve 113, one end of the second pressure regulating valve 113 is connected to the output end of the hydraulic pump 102, and the other end is connected to the clutch assembly 4 through a lubrication line 116, and lubrication oil required for operation of each mechanical component inside the clutch assembly 4 is provided through the lubrication line 116.
The reset mechanism 2 comprises an electromagnetic valve 201 and a hydraulic oil cylinder 202, the hydraulic oil cylinder 101 is connected with the electromagnetic valve 201 through a pipeline, the electromagnetic valve 201 is connected with the hydraulic oil cylinder 202 through a pipeline, the output end of the hydraulic oil cylinder 202 is connected with a piston, hydraulic drive is provided for the piston through the hydraulic oil cylinder 202, and the piston is assisted to reset. In this embodiment, the inside of piston cavity is provided with the spring, and the one end butt of spring is on the piston other end butt on the inner wall of piston cavity, can be used for the piston return, but when the pressure release time is very short, only rely on the elasticity of spring self not necessarily can ensure that the piston returns in place in very short time, at this moment, can ensure through canceling release mechanical system 2 that the piston is quick, accurate return in the pressure release time.
Preferably, the clutch assembly further comprises an alarm device, wherein the alarm device is connected with the electric control device, the alarm device can be a tri-color lamp and/or a buzzer, and when the numerical value of the first pressure sensor 106 exceeds a preset range, namely, the fatigue test of the clutch assembly 4 is failed, the electric control device controls the alarm device to give an alarm.
Preferably, the clutch assembly further comprises a monitoring device (not shown in the drawing), the monitoring device comprises four cameras and a display, the four cameras are aligned to the workbench from the front, back, left and right directions of the workbench to monitor, when the fatigue test time of the clutch assembly 4 is long, the whole process of the test can be recorded by arranging the monitoring device, an operator is prevented from manually monitoring on the test site for a long time, the labor intensity of the operator is reduced, and meanwhile, the operation safety of the operator is guaranteed.
In the embodiment, the clutch assembly 4 is driven to rotate through the driving mechanism 5, the piston of the clutch assembly 4 is driven to compress through the hydraulic device 1, the piston of the clutch assembly 4 is driven to return through the spring in the piston and the reset mechanism 2, the temperature of hydraulic oil is regulated through the heater 111, the first temperature sensor 109 and the second temperature sensor 110, and the temperature of the hydraulic oil is ensured to be between 110 ℃ and 130 ℃, so that the actual working state and working environment of the clutch assembly 4 can be simulated, the fatigue test result is more objective and real, and the integral test on the fatigue of the clutch assembly 4 is realized; the comparison between the pressure value fed back by the first pressure sensor 106 and the preset range can reflect whether the fatigue test failure occurs in each part in the clutch assembly 4, and the problems of complex test procedure and high test cost of the clutch assembly in the prior art are solved.
The embodiment also provides a fatigue test method for the clutch assembly, as shown in fig. 1-2, which is applicable to the fatigue test system for the clutch assembly in the embodiment, and comprises the following steps:
s10: the clutch assembly 4 is cooled to a temperature of-40 ℃ to-20 ℃ on the surface and inside.
The whole temperature of the clutch assembly 4 is controlled to be-40 ℃ to-20 ℃ at the beginning of the test, so that the use condition of the clutch assembly 4 in winter in the north can be simulated, and the fatigue test data of the clutch assembly 4 is more objective and real.
S11: the rotational speed V, the pressurization pressure P, the pressurization time T1, the depressurization time T2 of the clutch assembly 4, the predetermined range of the first pressure sensor 106, the temperature value T1 of the heater 111 for starting heating, the temperature value T2 of the heater 111 for stopping heating, and the injection pressure P1 of the lubricating oil are preset on the memory of the electronic control device.
S20: the pressurizing solenoid valve 103 is activated, the hydraulic pump 102 pressurizes, the pressure is adjusted to P by the first pressure regulating valve 104, and the pressure of the hydraulic oil for lubrication is adjusted to P1 by the second pressure regulating valve 113;
s30: the driving mechanism 5 drives the clutch assembly 4 to operate at a rotating speed V;
in step S30, the electronic control device combines the transmission ratio of the transmission component 53, adjusts the rotation speed of the high-speed motor 51 through the frequency converter 52, so that the clutch assembly 4 can operate at the rotation speed V after the rotation speed of the high-speed motor 51 is transmitted to the clutch assembly 4 through the transmission component 53, and simultaneously feeds back the actual rotation speed of the clutch assembly 4 to the electronic control device in real time through the rotation speed sensor 54, thereby ensuring the accuracy of the rotation speed of the clutch assembly 4, and when the difference between the actual rotation speed of the clutch assembly 4 and the rotation speed V is large, determining that the driving mechanism 5 is abnormal according to the difference.
S40: the input end of the three-way valve 105 is communicated with a pipeline between the first pressure regulating valve 104 and an oil return pipeline 114 between the three-way valve and the hydraulic oil tank 101 is closed, hydraulic oil drives the piston to compress, and the duration time T1 and T1 are pressurization time;
in step S40, the hydraulic oil with pressure P enters the bearing seat 3 through the three-way valve 105, the pressurization pipeline 115 and the pressurization oil port 301, and enters the piston cavity through the internal oil path of the bearing seat 3 and the internal oil path of the clutch assembly 4, so as to drive the piston to compress for a time T1.
S50: the input end of the three-way valve 105 is communicated with an oil return pipeline 114 between the hydraulic oil tank 101 and a pipeline between the three-way valve and the first pressure regulating valve 104 is closed, and the duration time T2 and T2 are pressure relief time;
in step S50, the electronic control device controls the solenoid valve 201 to open, the hydraulic cylinder 202 and the spring in the piston drive the piston to return together, and during this period, the hydraulic oil in the piston cavity returns to the hydraulic oil tank 101 through the pressurization pipeline 115 and the oil return pipeline 114, so as to achieve unloading of the hydraulic oil.
S60: repeating steps S40 and S50 for a time T, if the value of the first pressure sensor 106 is within the predetermined range, the fatigue test of the clutch assembly 4 is acceptable, if the value of the first pressure sensor 106 fluctuates beyond the predetermined range, the fatigue test of the clutch assembly 4 is unacceptable, and the test is stopped.
In step S60, if the fatigue test of the clutch assembly 4 is not qualified, the electronic control device also controls the alarm device to give an alarm.
It should be noted that in the above steps S20 to S60, when the temperature value measured by the first temperature sensor 109 and/or the second temperature sensor 110 is equal to or less than t1, the heater 111 is started and heats the hydraulic oil in the hydraulic oil tank 101, and when the temperature value measured by the first temperature sensor 109 and/or the second temperature sensor 110 is equal to or more than t2, the heater 111 stops heating.
Preferably, V is not less than 2000r/min and not more than 6500r/min, and specifically, V can be 2000r/min, 3000r/min, 4000r/min, 4500r/min, 5000r/min or 6500r/min.
Preferably, T1 is 1 s.ltoreq.T1 is 10s, and specifically, T1 may be 1s, 2s, 2.5s, 3s, 3.5s, 4s, 5s, 6s, 7s, 8s, 9s or 10s.
Preferably, 1 s.ltoreq.T2.ltoreq.10s, and in particular, T2 may be 0.5s, 1s, 1.5s, 2s, 2.5s, 4s, 5s, 6s, 7s, 8s, 9s, or 10s.
Preferably, 1455 kpa.ltoreq.P.ltoreq.3100 kpa, and in particular, P may be 1455kpa, 2115kpa, 2314kpa or 3100kpa.
Preferably, t1=110 to 115 ℃, t2=125 to 130 ℃, in particular, t1=115 ℃, t2=130 ℃.
It will be appreciated that during the fatigue testing of the clutch assembly 4, if any one or more of breakage, ablation, cracking, and abnormal wear of the parts in the clutch assembly 4 occurs, it is also possible to directly determine that the fatigue of the clutch assembly 4 is unacceptable.
The present embodiment may test the clutch assembly 4 by setting multiple sets of parameters, respectively, for example,
when t1=2s; t2=1s; v is equal to 2000r/min, 3000r/min, 4000r/min, 4500r/min, 5000r/min or 6500r/min, respectively; at each rotation speed of V, P is 1455kpa, 2115kpa, 2314kpa and 3100kpa in sequence, 24 conditions are used for testing the fatigue of the clutch assembly 4 under each condition, and the objectivity of the test result of the clutch assembly 4 is further ensured. Of course, the test parameters in the embodiment can be arbitrarily valued in the range of the test parameters and be arbitrarily matched.
It is to be understood that the above examples of the present invention are provided for clarity of illustration only and are not limiting of the embodiments of the present invention. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the invention are desired to be protected by the following claims.
Claims (7)
1. A test method for a clutch assembly fatigue test system, the clutch assembly fatigue test system comprising:
the hydraulic device (1) comprises a hydraulic oil tank (101), a hydraulic pump (102) and a first pressure regulating valve (104) which are sequentially connected, wherein the first pressure regulating valve (104) is connected with a first end of a three-way valve (105), a second end of the three-way valve (105) is connected with a piston of the clutch assembly (4) through a pressurizing pipeline (115) and is used for driving the piston to compress, a third end of the three-way valve (105) is connected with the hydraulic oil tank (101) through an oil return pipeline (114), and the first end of the three-way valve (105) is communicated with the second end or the second end of the three-way valve (105) is communicated with the third end; the pressurizing pipeline (115) is also connected with a first pressure sensor (106);
the reset mechanism (2) is used for driving the piston to return;
the driving mechanism (5) is connected with the clutch assembly (4) and can drive the clutch assembly (4) to rotate, and the output rotating speed of the driving mechanism (5) is adjustable;
the clutch device further comprises a bearing seat (3) connected with a release bearing in the clutch assembly (4), wherein a pressurizing oil port (301) is arranged on the bearing seat (3), and a third end of the three-way valve (105) is connected with the pressurizing oil port (301) through a pressurizing pipeline (115);
the hydraulic device (1) further comprises a second pressure sensor (107) and a first temperature sensor (109) for testing the pressure and temperature of the output port of the hydraulic pump (102), respectively;
the test method comprises the following steps:
s10: cooling the clutch assembly (4) to enable the surface and the interior of the clutch assembly to reach-40 ℃ to-20 ℃;
s20: the hydraulic pump (102) is pressurized and the pressure is regulated to P through the first pressure regulating valve (104);
s30: the driving mechanism (5) drives the clutch assembly (4) to operate at a rotating speed V;
s40: the first end and the second end of the three-way valve (105) are communicated, the second end and the third end of the three-way valve (105) are closed, the duration time T1 is long, the hydraulic oil drives the piston to compress, and the T1 is the pressurization time;
s50: the first end and the second end of the three-way valve (105) are closed, the second end of the three-way valve (105) is communicated with the third end, and the duration time T2 are decompression time;
s60: repeating steps S40 and S50 within a time T, if the value of the first pressure sensor (106) is within a preset range within the time T, the fatigue test of the clutch assembly (4) is qualified, and if the value fluctuation of the first pressure sensor (106) exceeds the preset range, the fatigue test of the clutch assembly (4) is failed, and stopping the test.
2. The testing method according to claim 1, characterized in that the hydraulic device (1) further comprises a second temperature sensor (110) and a heater (111) both arranged in the hydraulic tank (101).
3. The test method according to claim 1, characterized in that the output end of the hydraulic pump (102) is connected with a lubrication port of the clutch assembly (4) through a second pressure regulating valve (113).
4. The test method according to claim 1, characterized in that the return mechanism (2) comprises a solenoid valve (201) connected to the output of the hydraulic pump (102), and a hydraulic cylinder (202) connected to the solenoid valve (201), the output of the hydraulic cylinder (202) being connected to the piston and being adapted to drive the piston back.
5. The test method according to claim 1, characterized in that the drive mechanism (5) comprises a high-speed motor (51), a transmission assembly (53) connecting the high-speed motor (51) and the clutch assembly (4), a frequency converter (52) connected to the high-speed motor (51), and a rotational speed sensor (54) for testing the rotational speed of the clutch assembly (4).
6. The method of testing according to claim 5, wherein the transmission assembly (53) comprises a spline shaft (531) connected to the input of the clutch assembly (4), a first toothed pulley (532) mounted on the spline shaft (531), a second toothed pulley (533) mounted on the output shaft of the high speed motor (51), and a toothed belt (534) connecting the first toothed pulley (532) and the second toothed pulley (533).
7. The test method of claim 1, further comprising an alarm device.
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| CN107884186B true CN107884186B (en) | 2023-12-05 |
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| JP7051609B2 (en) * | 2018-06-26 | 2022-04-11 | 株式会社神戸製鋼所 | Rotating machine abnormality treatment device and rotating machine system |
| CN112816812A (en) * | 2020-12-30 | 2021-05-18 | 嘉兴毅拓汽车科技有限公司 | Function test equipment for non-intelligent electric control actuator and test method thereof |
| CN113551906B (en) * | 2021-07-30 | 2023-11-28 | 博格华纳汽车零部件(北京)有限公司 | Device and method for testing pressure fluctuation of hydraulic drive system |
| CN113776822A (en) * | 2021-09-22 | 2021-12-10 | 西安法士特汽车传动有限公司 | Torsion fatigue test system and method for separating clutch assembly |
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| CN102053039A (en) * | 2010-12-07 | 2011-05-11 | 浙江大学 | Engine body hydraulic fatigue test system |
| CN202836963U (en) * | 2012-07-31 | 2013-03-27 | 上海通用汽车有限公司 | Fatigue test apparatus for wet type clutch plate group |
| CN105403404A (en) * | 2015-12-11 | 2016-03-16 | 北京金风科创风电设备有限公司 | Conveyer belt fatigue test device |
| CN207636300U (en) * | 2017-12-12 | 2018-07-20 | 上海交运汽车动力系统有限公司 | A kind of clutch assembly fatigue test system |
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| CN102053039A (en) * | 2010-12-07 | 2011-05-11 | 浙江大学 | Engine body hydraulic fatigue test system |
| CN202836963U (en) * | 2012-07-31 | 2013-03-27 | 上海通用汽车有限公司 | Fatigue test apparatus for wet type clutch plate group |
| CN105403404A (en) * | 2015-12-11 | 2016-03-16 | 北京金风科创风电设备有限公司 | Conveyer belt fatigue test device |
| CN207636300U (en) * | 2017-12-12 | 2018-07-20 | 上海交运汽车动力系统有限公司 | A kind of clutch assembly fatigue test system |
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