CN113109045B - Durability test method for booster assembly - Google Patents
Durability test method for booster assembly Download PDFInfo
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- CN113109045B CN113109045B CN202110266771.5A CN202110266771A CN113109045B CN 113109045 B CN113109045 B CN 113109045B CN 202110266771 A CN202110266771 A CN 202110266771A CN 113109045 B CN113109045 B CN 113109045B
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- 238000010998 test method Methods 0.000 title claims abstract description 16
- 238000012360 testing method Methods 0.000 claims abstract description 54
- 238000009413 insulation Methods 0.000 claims abstract description 21
- 239000003921 oil Substances 0.000 claims description 39
- 239000010720 hydraulic oil Substances 0.000 claims description 34
- 238000000034 method Methods 0.000 claims description 14
- 238000004321 preservation Methods 0.000 claims description 7
- 238000005299 abrasion Methods 0.000 claims description 2
- 238000001514 detection method Methods 0.000 abstract description 3
- 238000005259 measurement Methods 0.000 description 10
- 230000033001 locomotion Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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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
- G01M13/025—Test-benches with rotational drive means and loading means; Load or drive simulation
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Abstract
The invention relates to a durability test method of a booster assembly, which comprises the following steps: according to the new state of the friction plate of the clutch in the whole vehicle, the position of a piston of a booster assembly is adjusted on a rack through a push rod, and the booster assembly is placed in an insulation box; sequentially and correspondingly carrying out endurance cycle tests of the booster assembly according to the sequence of normal temperature, high temperature and low temperature; according to the state of the clutch in the whole vehicle after the friction plate is worn, the position of a piston of the booster assembly is adjusted on a bench through a push rod, and the booster assembly is placed in the heat insulation box; and correspondingly carrying out the endurance cycle test of the booster assembly according to the sequence of normal temperature, high temperature and low temperature. The endurance test method of the booster assembly can truly simulate the actual working condition environment of the vehicle in various temperature environments, effectively verify the reliability of the booster assembly, reduce the failure rate of the booster assembly in the market, and realize the tightness detection of multiple measuring points of the piston.
Description
Technical Field
The invention relates to the technical field of hydraulic technology and pneumatic technology, in particular to a durability test method of a booster assembly.
Background
At present, the booster assembly is a power output actuating mechanism in a clutch system, and the booster assembly pushes the separation shifting fork through the push rod, so that the clutch is separated and combined remotely, and further manual gear selection and gear shifting operation is conveniently completed.
In the related art, the reliability and smoothness of the booster assembly directly influence the service life and the applicable environment of the whole vehicle clutch system, so that the working durability of the booster assembly is very critical, the booster assembly with good durability can ensure the reliability of clutch separation and combination, and in order to ensure the reliability of the booster assembly, a durability test is required to be carried out on the booster assembly so as to determine whether the reliability of the durable operation of the booster assembly can meet the corresponding requirements in the whole vehicle durability test standard.
Accordingly, there is a need to devise a method of endurance testing a booster assembly that overcomes the above-described problems.
Disclosure of Invention
The embodiment of the invention provides a endurance test method of a booster assembly, which aims to solve the problem that endurance tests are needed to be carried out on the booster assembly in the related art to determine whether the reliability of endurance operation of the booster assembly can meet corresponding requirements in the whole vehicle endurance test standard.
In a first aspect, there is provided a method of endurance testing a booster assembly, comprising the steps of: adjusting the position of a piston of a booster assembly according to the state before the friction plate of a clutch in the whole vehicle is worn, and placing the booster assembly in an insulation box; sequentially controlling the temperature in the heat insulation box according to the sequence of normal temperature, high temperature and low temperature, and driving the piston to reciprocate correspondingly at each temperature; adjusting the position of a piston of the booster assembly according to the state of a clutch plate in the whole vehicle after being worn, and placing the booster assembly in the heat insulation box; and controlling the temperature in the heat preservation box again according to the sequence of normal temperature, high temperature and low temperature, and driving the piston to reciprocate correspondingly at each temperature.
In some embodiments, before adjusting the position of the piston of the booster assembly according to the state before the friction plate of the clutch in the whole vehicle is worn, and placing the booster assembly in the insulation box, the method further comprises: the booster assembly was allowed to stand at room temperature for at least 3 hours.
In some embodiments, the booster assembly has a cylinder block, the adjusting the position of the piston of the booster assembly according to the state before the friction plate of the clutch in the whole vehicle is worn, and placing the booster assembly in the incubator, including: and adjusting the piston of the booster assembly to the middle position of the cylinder body of the cylinder, and then placing the booster assembly in the heat insulation box.
In some embodiments, the booster assembly has a cylinder body, the temperature in the incubator is controlled in order of normal temperature, high temperature, low temperature in turn, and the piston is driven to reciprocate at each temperature correspondingly, including: the temperature in the heat preservation box is adjusted to be in a normal temperature state, air is filled into an air inlet of the booster assembly and an air inlet of the gear shifting control valve in the normal temperature state, hydraulic oil is filled into an oil inlet of the booster assembly at intervals, and the piston is driven to reciprocate; the temperature in the incubator is adjusted to be in a high-temperature state, gas is filled into the air inlet of the booster assembly and the air inlet of the gear shifting control valve in the high-temperature state, hydraulic oil is filled into the oil inlet of the booster assembly at intervals, and the piston is driven to reciprocate; and adjusting the temperature in the incubator to be in a low-temperature state, filling air into an air inlet of the booster assembly and an air inlet of the gear shifting control valve in the low-temperature state, and filling hydraulic oil into an oil inlet of the booster assembly at intervals to drive the piston to reciprocate.
In some embodiments, the test temperature at ambient temperature is 60 ℃ ± 3 ℃, the test temperature at elevated temperature is 100 ℃ ± 3 ℃, and the test temperature at low temperature is-40 ℃ ± 3 ℃.
In some embodiments, the range of air pressure charged by the air inlet of the booster assembly is 0.8-1 Mpa, the range of air pressure charged by the air inlet of the gear shift control valve is 0.8-1 Mpa, and the oil pressure charged by the oil inlet of the booster assembly is 4Mpa.
In some embodiments, in step a1, the piston is driven to reciprocate 15 to 30 times per minute and at least 37 ten thousand times in total; in step a2, driving the piston to reciprocate 15-30 times per minute and performing at least 12.5 ten thousand times in total; in step a3, the piston is driven to reciprocate 4 to 8 times per minute and at least 5000 times in total.
In some embodiments, the position of the piston of the booster assembly is adjusted according to the state of the clutch plate in the whole vehicle after the friction plate is worn, the temperature in the heat insulation box is adjusted to be room temperature before the booster assembly is placed in the heat insulation box, and the booster assembly is taken out from the heat insulation box after being placed for a preset time.
In some embodiments, the booster assembly has a push rod connected with the piston, the position of the piston of the booster assembly is adjusted according to the state of the worn friction plate of the clutch in the whole vehicle, and the booster assembly is placed in the insulation box, including: and according to the state of the clutch in the whole vehicle after the friction plate is worn, moving the piston of the booster assembly to a preset position in a direction close to the push rod, and then placing the booster assembly in the heat insulation box again.
In some embodiments, after sequentially controlling the temperature in the incubator according to the sequence of normal temperature, high temperature and low temperature, and driving the piston to reciprocate at each temperature correspondingly, the method further comprises: taking the position of one end of a cylinder body of the booster assembly, which is moved to the piston, as an initial point, and taking a measuring point from the initial point to the other end of the cylinder body at intervals delta s; and filling gas and hydraulic oil into the booster assembly, so that the piston moves to each measuring point from the initial point in sequence, and detecting the tightness of the booster assembly at each measuring point.
The technical scheme provided by the invention has the beneficial effects that:
the embodiment of the invention provides a endurance test method of a booster assembly, wherein the position of a piston of the booster assembly is adjusted according to the state before the friction plate of a clutch is worn, the booster assembly is placed in an incubator to drive the piston of the booster assembly to reciprocate, so that the booster assembly sequentially carries out endurance tests in a normal-temperature, high-temperature and low-temperature environment for a plurality of times, then the position of the piston of the booster assembly is adjusted according to the state after the friction plate of the clutch is worn, and the booster assembly is placed in the incubator to drive the piston of the booster assembly again to reciprocate, so that the booster assembly sequentially carries out endurance tests in a normal-temperature, high-temperature and low-temperature environment for a plurality of times, the actual working condition environment of a vehicle can be truly simulated in various temperature environments, the reliability of the booster assembly is effectively verified, and the marketing failure rate of the booster assembly is reduced; meanwhile, a plurality of endurance tests are carried out at positions corresponding to the booster assembly after the friction plate is worn, the unknown risk in a new movable range due to the change of the movable range of the piston caused by the friction plate wear is avoided, the plurality of endurance tests of the piston in different movable ranges are realized, and whether the reliability of the booster assembly in endurance work at a plurality of mounting positions can meet the corresponding requirements in the whole vehicle endurance test standard can be determined.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of a method of endurance testing a booster assembly provided in an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a booster assembly according to an embodiment of the present invention.
In the figure:
1. a booster assembly;
11. a cylinder block;
12. a piston;
13. a push rod.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The embodiment of the invention provides a endurance test method of a booster assembly, which can solve the problem that endurance test is required to be carried out on the booster assembly in the related art to determine whether the reliability of endurance operation of the booster assembly can meet corresponding requirements in the whole vehicle endurance test standard.
Referring to fig. 1 and 2, a method for testing durability of a booster assembly according to an embodiment of the present invention may include the following steps:
s101: and adjusting the position of a piston 12 of the booster assembly 1 according to the state before the friction plate of the clutch in the whole vehicle is worn, and placing the booster assembly 1 in an insulation box.
In some embodiments, before step S101, it may include: the booster assembly 1 is left to stand in a room temperature environment for at least 3 hours, for example, the booster assembly 1 is transported from other areas, so that the temperature of the booster assembly 1 is different from the room temperature in a laboratory, and the booster assembly 1 needs to stand for a period of time so that the temperature of the booster assembly 1 is approximately the same as the room temperature, so that the accuracy of a subsequent endurance test is facilitated; and the booster assembly 1 may also be mounted on a stand for positioning.
In some alternative embodiments, in step S101, the booster assembly 1 has a cylinder block 11, and the piston 12 is movable in the cylinder block 11, and one side of the piston 12 is connected to the push rod 13, and the adjusting the position of the piston 12 of the booster assembly 1 according to the state before the friction plate of the clutch in the whole vehicle is worn, and placing the booster assembly 1 in the incubator may include: the piston 12 of the booster assembly 1 is adjusted to the middle position of the cylinder body 11, that is, when the friction plate of the clutch is in a new plate state, the piston 12 of the booster assembly 1 is approximately positioned at the middle position of the length of the cylinder body 11, the position of the piston 12 is adjusted on the bench according to the corresponding mounting position of the booster assembly 1 in the new plate state to simulate, and the position is defined as the first position of the piston 12, wherein the position of the piston 12 in the cylinder body 11 is adjusted by moving the push rod 13, and then the booster assembly 1 can be integrally placed in the insulation box after the position of the piston 12 is adjusted.
S102: the temperature in the incubator is controlled sequentially in the order of normal temperature, high temperature, and low temperature, and the piston 12 is driven to reciprocate correspondingly at each temperature.
In some embodiments, in step S102, the controlling the temperatures in the incubator sequentially according to the normal temperature, the high temperature, and the low temperature, and driving the piston 12 to reciprocate at the respective temperatures may include the following steps:
a1: the temperature in the incubator is adjusted to be in a normal temperature state, air is filled into the air inlet of the booster assembly 1 and the air inlet of the gear shifting control valve in the normal temperature state, hydraulic oil is filled into the oil inlet of the booster assembly 1 at intervals, specifically, the air in the air inlet and the air inlet of the gear shifting control valve is always filled, the hydraulic oil in the oil inlet is filled in every interval, when the hydraulic oil is filled into the oil inlet, the hydraulic oil opens the air cavity valve, so that the air enters the cylinder body 11, the air in the cylinder body 11 pushes the piston 12 to move in a direction away from the air inlet, when the oil pressure is removed, the air cavity valve is closed, the air in the cylinder body 11 can be slowly discharged from a small channel on one side, and the piston 12 automatically returns through the return spring so as to drive the piston 12 to reciprocate, and the endurance test in the normal temperature state is realized.
a2: the temperature in the incubator can be adjusted to be in a high-temperature state, air is filled into the air inlet of the booster assembly 1 and the air inlet of the gear shifting control valve in the high-temperature state, hydraulic oil is filled into the oil inlet of the booster assembly 1 at intervals, specifically, the air in the air inlet and the air inlet of the gear shifting control valve are always filled, the hydraulic oil in the oil inlet is filled every time, when the hydraulic oil is filled into the oil inlet, the hydraulic oil opens the air cavity valve, so that the air enters the cylinder body 11, and then the air in the cylinder body 11 pushes the piston 12 to move in a direction away from the air inlet, when the oil pressure is removed, the air cavity valve is closed, the air in the cylinder body 11 can be slowly discharged from a small channel on one side, and the piston 12 automatically returns through the return spring so as to drive the piston 12 to reciprocate, and the endurance test in the high-temperature state is realized.
a3: the temperature in the incubator is adjusted to be in a low-temperature state, air is filled into an air inlet of the booster assembly 1 and an air inlet of the gear shifting control valve in the low-temperature state, hydraulic oil is filled into an oil inlet of the booster assembly 1 at intervals, specifically, the air inlet and the air inlet of the gear shifting control valve are filled with the hydraulic oil at intervals, when the hydraulic oil is filled into the oil inlet, the hydraulic oil opens an air cavity valve, so that the air enters the cylinder body 11, the air in the cylinder body 11 pushes the piston 12 to move in a direction away from the air inlet, when the oil pressure is removed, the air cavity valve is closed, the air in the cylinder body 11 can be slowly discharged from a small channel on one side, and the piston 12 automatically returns through a return spring to drive the piston 12 to reciprocate, so that a endurance test in the low-temperature state is realized; wherein, step a 1-a 3 is a round of endurance cycle test of the piston 12 in the first position state, and the small passage for air release of the cylinder body 11 is smaller, the air release is slower, and the small passage can be always opened.
In some embodiments, in step S102, the maximum angle between the push rod 13 and the axis of the cylinder body 11 may be controlled to be not more than 3 ° by using the bench during the test, so as to satisfy the movement range of the push rod 13 in the real vehicle.
Further, in step S102, the test temperature at normal temperature is preferably 60±3 ℃, the test temperature at high temperature is preferably 100±3 ℃, and the test temperature at low temperature is preferably-40±3 ℃, because the booster assembly 1 is near the heat source after being mounted on the real vehicle, the normal temperature is higher than 20 ℃ and the high temperature is higher than 80 ℃, the normal temperature, high temperature and low temperature of the incubator can simulate the normal temperature, high temperature and low temperature in the real vehicle more truly, and the durability of the booster assembly 1 is accurately verified; table 1 below is the test temperature:
TABLE 1
| Normal temperature | High temperature | Low temperature | |
| Test temperature (. Degree. C.) | 60±3 | 100±3 | -40±3 |
Further, in step S102, the air pressure range of the air inlet of the booster assembly 1 may be 0.8-1 Mpa, the air pressure range of the air inlet of the shift control valve may be 0.8-1 Mpa, in this embodiment, the air pressures of the air inlet and the air inlet of the shift control valve are both preferably 0.8Mpa, the oil pressure of the air inlet of the booster assembly 1 may be 4Mpa, and the oil pressure is higher than 1 Mpa.
Further, in step a1, the piston 12 may be driven to reciprocate 15 to 30 times per minute, and at least 37 ten thousand times of reciprocation are performed in total, and compared with 22.5 ten thousand times, the test index is higher; in the step a2, the piston 12 can be driven to reciprocate 15-30 times per minute, and at least 12.5 ten thousand times of reciprocating motions are performed in one round, compared with 7.5 ten thousand times, the test index is higher; in step a3, the piston 12 can be driven to reciprocate for 4-8 times per minute, and a round of reciprocating motion is performed for at least 5000 times in total, compared with 3000 times, the test index is higher, so that the booster assembly 1 is more severely verified in the product design stage, the design defect can be avoided in the development stage, the booster assembly 1 is not caused to be represented in the market due to failure, and the public praise of claim and manufacturer is reduced; wherein, the heat preservation time of each stage of the steps a1, a2 and a3 can be set according to the need, and is generally set to be 12 hours; table 2 below is information on the number of times the piston 12 is subjected to two runs in the first position:
TABLE 2
Further, the position of the piston 12 at one end of the cylinder block 11 of the booster assembly 1 may be taken as an initial point, in this embodiment, the piston 12 is moved to the leftmost end of the cylinder block 11, then, a measurement point is taken from the initial point to the right end of the cylinder block 11 at intervals of Δs, where the condition allows, and Δs is generally taken as a small and round measurement point, in this embodiment, taking the full stroke l=85 mm of the piston 12 as an example, and taking Δs=5 mm, that is, taking one measurement point every 5mm, where the initial point is the initial measurement point, and adding 18 measurement points to the initial point; in step S102, gas and hydraulic oil may be respectively filled into the booster assembly 1 after steps a1, a2 and a3 of each round, so that the piston 12 moves to each measurement point sequentially from the initial point, and the tightness of the booster assembly 1 is detected at each measurement point, so that the tightness of the air pressure and the oil pressure is detected for the full stroke of the booster assembly 1 after each temperature cycle test, and the full stroke of the piston 12 in the cylinder body 11 is covered, thereby the test method can adapt to the booster assembly 1 variety of any working stroke, and the limitation of single-point detection can be eliminated; meanwhile, when the piston 12 moves to each measuring point, the position of the piston 12 can be precisely controlled through limiting the push rod 13 by the rack, so that the piston 12 accurately moves to each measuring point.
S103: and adjusting the position of a piston 12 of the booster assembly 1 according to the state of the clutch plate in the whole vehicle after abrasion, and placing the booster assembly 1 in an insulation box.
In some embodiments, the temperature in the incubator may be adjusted to room temperature before step S103, and the booster assembly 1 may be taken out of the incubator after being left in the incubator for a preset time.
In some embodiments, in step S103, the adjusting the position of the piston 12 of the booster assembly 1 according to the worn state of the friction plate of the clutch in the whole vehicle, and placing the booster assembly 1 in the incubator may include: according to the mounting position of the booster assembly 1 corresponding to the worn friction plate of the clutch in the whole vehicle, the piston 12 of the booster assembly 1 is moved to a preset position on the rack through the push rod 13 in the direction close to the push rod 13, specifically, the thickness of the worn friction plate is reduced relative to that of a new plate, the position of the corresponding push rod 13 and the position of the piston 12 are moved in the direction far away from the oil inlet, in this embodiment, the push rod 13 is positioned on the right side of the piston 12, after the friction plate is worn, in order to enable the positions of the piston 12 and the push rod 13 to truly simulate the actual positions in the real vehicle, the piston 12 and the push rod 13 need to be moved rightward for a certain distance according to the worn state of the friction plate, the piston 12 is positioned at a preset second position, and then the booster assembly 1 is placed in the heat insulation box again after the position of the piston 12 is adjusted.
S104: the temperature in the incubator is controlled again in the order of normal temperature, high temperature, and low temperature, and the piston 12 is driven to reciprocate correspondingly at each temperature.
In some embodiments, in step S104, the controlling the temperature in the incubator again in the order of normal temperature, high temperature, and low temperature, while driving the piston 12 to reciprocate correspondingly at each temperature may include the following steps:
b1: the temperature in the incubator is adjusted to be in a normal temperature state, air is filled into the air inlet of the booster assembly 1 and the air inlet of the gear shifting control valve in the normal temperature state, hydraulic oil is filled into the oil inlet of the booster assembly 1 at intervals, specifically, the air in the air inlet and the air inlet of the gear shifting control valve is always filled, the hydraulic oil in the oil inlet is filled in every interval, when the hydraulic oil is filled into the oil inlet, the hydraulic oil opens the air cavity valve, so that the air enters the cylinder body 11, the air in the cylinder body 11 pushes the piston 12 to move in a direction away from the air inlet, when the oil pressure is removed, the air cavity valve is closed, the air in the cylinder body 11 can be slowly discharged from a small channel on one side, and the piston 12 automatically returns through the return spring so as to drive the piston 12 to reciprocate, and the endurance test in the normal temperature state is realized.
b2: the temperature in the incubator can be adjusted to be in a high-temperature state, air is filled into the air inlet of the booster assembly 1 and the air inlet of the gear shifting control valve in the high-temperature state, hydraulic oil is filled into the oil inlet of the booster assembly 1 at intervals, specifically, the air in the air inlet and the air inlet of the gear shifting control valve are always filled, the hydraulic oil in the oil inlet is filled every time, when the hydraulic oil is filled into the oil inlet, the hydraulic oil opens the air cavity valve, so that the air enters the cylinder body 11, and then the air in the cylinder body 11 pushes the piston 12 to move in a direction away from the air inlet, when the oil pressure is removed, the air cavity valve is closed, the air in the cylinder body 11 can be slowly discharged from a small channel on one side, and the piston 12 automatically returns through the return spring so as to drive the piston 12 to reciprocate, and the endurance test in the high-temperature state is realized.
b3: the temperature in the incubator is adjusted to be in a low-temperature state, air is filled into an air inlet of the booster assembly 1 and an air inlet of the gear shifting control valve in the low-temperature state, hydraulic oil is filled into an oil inlet of the booster assembly 1 at intervals, specifically, the air inlet and the air inlet of the gear shifting control valve are filled with the hydraulic oil at intervals, when the hydraulic oil is filled into the oil inlet, the hydraulic oil opens an air cavity valve, so that the air enters the cylinder body 11, the air in the cylinder body 11 pushes the piston 12 to move in a direction away from the air inlet, when the oil pressure is removed, the air cavity valve is closed, the air in the cylinder body 11 can be slowly discharged from a small channel on one side, and the piston 12 automatically returns through a return spring to drive the piston 12 to reciprocate, so that a endurance test in the low-temperature state is realized; wherein, step b 1-b 3 is a round of endurance cycle test performed by the piston 12 in the second position state, and the small passage for air release of the cylinder body 11 is smaller, the air release is slower, and the small passage can be always opened.
In some embodiments, in step S104, the maximum angle between the push rod 13 and the axis of the cylinder body 11 may be controlled to be not more than 3 ° by using the bench during the test, so as to satisfy the movement range of the push rod 13 in the real vehicle.
Further, in step S104, the test temperature at normal temperature is preferably 60+ -3 ℃, the test temperature at high temperature is preferably 100+ -3 ℃, and the test temperature at low temperature is preferably-40+ -3 ℃; the air pressure range of the booster assembly 1 filled with the air inlet can be 0.8-1 Mpa, the air pressure range of the gear shift control valve filled with the air inlet can be 0.8-1 Mpa, and the oil pressure of the booster assembly 1 filled with the oil inlet can be 4Mpa.
Further, in step b1, the piston 12 may be driven to reciprocate 15 to 30 times per minute, and at least 37 ten thousand times in total are performed in one round; in step b2, the piston 12 is driven to reciprocate 15 to 30 times per minute, and at least 12.5 ten thousand times are performed in total in one round; in step b3, the piston 12 is driven to reciprocate 4 to 8 times per minute, and at least 5000 times in total are performed in one round.
Further, in step S103, gas and hydraulic oil may be filled into the booster assembly 1 after steps b1, b2 and b3 of each round, so that the piston 12 moves to each measurement point sequentially from the initial point, and the tightness of the booster assembly 1 is detected at each measurement point, so that the tightness of the air pressure and the oil pressure is detected for the full stroke of the booster assembly 1 after each temperature cycle test, the tightness detection of multiple measurement points of the booster assembly piston 12 at different temperatures is realized, the full stroke of the piston 12 in the cylinder body 11 is covered, the reliability of the booster assembly 1 is effectively verified, and the marketing failure rate of the booster assembly 1 is reduced.
The principle of the endurance test method of the booster assembly provided by the embodiment of the invention is as follows:
the position of the piston 12 of the booster assembly 1 is adjusted according to the state before the friction plate of the clutch is worn, the booster assembly 1 is placed in the heat insulation box to drive the piston of the booster assembly 1 to reciprocate, so that the booster assembly 1 sequentially carries out endurance test in the environment with normal temperature, high temperature and low temperature, then the position of the piston 12 of the booster assembly 1 is adjusted according to the state after the friction plate of the clutch is worn, and the booster assembly 1 is placed in the heat insulation box to drive the piston of the booster assembly 1 again to reciprocate, so that the booster assembly 1 sequentially carries out endurance test in the environment with normal temperature, high temperature and low temperature for multiple times, the actual working condition environment of a vehicle can be truly simulated under multiple environments with normal temperature, high temperature and low temperature, the reliability of the booster assembly 1 is effectively verified, and the marketing failure rate of the booster assembly 1 is reduced; meanwhile, the durability test is carried out for a plurality of times (comprising 100 thousands of times) at the positions corresponding to the booster assembly 1 after the friction plate is worn, so that the reliability of the booster assembly 1 after the clutch is used for a period of time can be verified, the unknown risk in a new movable range due to the change of the movable range of the piston 12 caused by the friction plate wear is avoided, the plurality of times of durability tests of the piston 12 in different movable ranges are realized, and whether the reliability of the booster assembly 1 in durable operation at a plurality of mounting positions can meet the corresponding requirements in the whole vehicle durability test standard can be determined.
In the description of the present invention, it should be noted that the azimuth or positional relationship indicated by the terms "upper", "lower", etc. are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of describing the present invention and simplifying the description, and are not indicative or implying that the apparatus or element in question must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present invention. Unless specifically stated or limited otherwise, the terms "mounted," "connected," and "coupled" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
It should be noted that in the present invention, relational terms such as "first" and "second" and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The foregoing is only a specific embodiment of the invention to enable those skilled in the art to understand or practice the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (8)
1. A endurance test method of a booster assembly (1) having a cylinder block (11) and a push rod (13) connected to a piston (12), characterized in that it comprises the steps of:
adjusting a piston (12) of a booster assembly (1) to the middle position of the cylinder body (11), and then placing the booster assembly (1) in an insulation box;
sequentially controlling the temperature in the incubator according to the sequence of normal temperature, high temperature and low temperature, and driving the piston (12) to reciprocate correspondingly at each temperature;
according to the state of the clutch in the whole vehicle after the friction plate is worn, moving a piston (12) of the booster assembly (1) to a preset position in a direction close to a push rod (13) of the booster assembly (1), and then placing the booster assembly (1) in the heat insulation box again;
and controlling the temperature in the heat preservation box again according to the sequence of normal temperature, high temperature and low temperature, and driving the piston (12) to reciprocate correspondingly at each temperature.
2. The method of endurance testing of a booster assembly as claimed in claim 1, wherein:
before adjusting the position of a piston (12) of the booster assembly (1) according to the state before the friction plate of the clutch in the whole vehicle is worn, and placing the booster assembly (1) in the heat insulation box, the booster further comprises: the booster assembly (1) is allowed to stand at room temperature for at least 3 hours.
3. A durability test method of a booster assembly according to claim 1, wherein the booster assembly (1) has a cylinder block (11), and the sequentially controlling the temperatures in the incubator in the order of normal temperature, high temperature, and low temperature while driving the piston (12) to reciprocate correspondingly at the respective temperatures includes:
the temperature in the incubator is adjusted to be in a normal temperature state, air is filled into an air inlet of the booster assembly (1) and an air inlet of a gear shifting control valve in the normal temperature state, hydraulic oil is filled into an oil inlet of the booster assembly (1) at intervals, and the piston (12) is driven to reciprocate;
the temperature in the incubator is adjusted to be in a high-temperature state, gas is filled into the air inlet of the booster assembly (1) and the air inlet of the gear shifting control valve in the high-temperature state, hydraulic oil is filled into the oil inlet of the booster assembly (1) at intervals, and the piston (12) is driven to reciprocate;
and adjusting the temperature in the incubator to be in a low-temperature state, filling air into an air inlet of the booster assembly (1) and an air inlet of a gear shifting control valve in the low-temperature state, filling hydraulic oil into an oil inlet of the booster assembly (1) at intervals, and driving the piston (12) to reciprocate.
4. A method of testing the durability of a booster assembly according to claim 3 wherein:
the test temperature at the normal temperature is 60+/-3 ℃, the test temperature at the high temperature is 100+/-3 ℃, and the test temperature at the low temperature is-40+/-3 ℃.
5. A method of testing the durability of a booster assembly according to claim 3 wherein:
the range of air pressure filled in the air inlet of the booster assembly (1) is 0.8-1 Mpa, the range of air pressure filled in the air inlet of the gear shifting control valve is 0.8-1 Mpa, and the oil pressure filled in the oil inlet of the booster assembly (1) is 4Mpa.
6. A method of testing the durability of a booster assembly according to claim 3 wherein:
in step a1, the piston (12) is driven to reciprocate 15 to 30 times per minute and is performed at least 37 ten thousand times in total;
in step a2, the piston (12) is driven to reciprocate 15 to 30 times per minute and at least 12.5 ten thousand times in total;
in step a3, the piston (12) is driven to reciprocate 4 to 8 times per minute and at least 5000 times in total.
7. The method of endurance testing of a booster assembly as claimed in claim 1, wherein:
and adjusting the position of a piston (12) of the booster assembly (1) according to the state of the clutch plate in the whole vehicle after abrasion, adjusting the temperature in the heat preservation box to room temperature before the booster assembly (1) is placed in the heat preservation box, and taking the booster assembly (1) out of the heat preservation box after standing for a preset time.
8. The endurance test method of the booster assembly as claimed in claim 1, further comprising, after sequentially controlling the temperatures in the incubator in order of normal temperature, high temperature, and low temperature while driving the pistons (12) to reciprocate correspondingly at the respective temperatures:
taking the position of one end of a cylinder body (11) of the booster assembly (1) moved by the piston (12) as an initial point, and taking a measuring point from the initial point to the other end of the cylinder body (11) at intervals of delta s;
and filling gas and hydraulic oil into the booster assembly (1), enabling the piston (12) to sequentially move to each measuring point from the initial point, and detecting the tightness of the booster assembly (1) at each measuring point.
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