CN113758705A - Test detection method for AT gearbox - Google Patents
Test detection method for AT gearbox Download PDFInfo
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- CN113758705A CN113758705A CN202110939216.4A CN202110939216A CN113758705A CN 113758705 A CN113758705 A CN 113758705A CN 202110939216 A CN202110939216 A CN 202110939216A CN 113758705 A CN113758705 A CN 113758705A
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- 238000012360 testing method Methods 0.000 title claims abstract description 73
- 238000001514 detection method Methods 0.000 title claims abstract description 42
- 230000005540 biological transmission Effects 0.000 claims abstract description 112
- 239000003921 oil Substances 0.000 claims abstract description 47
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 10
- 238000011056 performance test Methods 0.000 claims abstract description 5
- 238000005259 measurement Methods 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 5
- 238000004364 calculation method Methods 0.000 claims description 2
- 230000001050 lubricating effect Effects 0.000 claims description 2
- 238000001816 cooling Methods 0.000 abstract description 2
- 239000010687 lubricating oil Substances 0.000 abstract description 2
- 238000003754 machining Methods 0.000 abstract 1
- 230000009347 mechanical transmission Effects 0.000 description 4
- 238000004458 analytical method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 238000010923 batch production Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 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
Abstract
The invention discloses a test detection method of an AT gearbox, which comprises the following steps: 1) an idle power loss of the AT transmission under test is detected. 2) And under the hydraulic working condition, the practical performance test of each gear rack test is completed. 3) And under the mechanical working condition, completing each gear test. 4) And detecting whether the variation relation between the rotating speed, the flow and the pressure of the hydraulic pump is normal or not at different rotating speeds. 5) And checking whether the oil passages of all the operating piece machines are normal. After the transmission part is assembled, the invention carries out detection tests on the transmission part and hydraulic oil circuit seal, tests main oil pressure, control oil pressure, lubricating oil pressure, oil pressure of each clutch, oil pressure of an input port of a hydraulic torque converter, cooling oil flow of a radiator, working pressure and flow tests of an oil pump, gear shifting tests, tests of rotating speed and idling torque of a gearbox, tests of transmission ratio of the gearbox and the like, evaluates the machining and assembling quality of the whole machine, and can carry out comprehensive detection and fault location before delivery of a gearbox transmission body to the greatest extent.
Description
Technical Field
The invention relates to the field of gearbox detection, in particular to a test detection method for an AT gearbox.
Background
AT present, AT transmissions gradually enter heavy commercial vehicle markets such as engineering machinery, special vehicles and the like. The high reliability requirements of special vehicles force the AT gearbox to be of the highest possible quality.
The AT gearbox is a comprehensive transmission gearbox integrating mechanical, electric and hydraulic functions. From the current gearbox fault statistics, after software and hardware of the gearbox in the aspect of 'electricity' are verified through tests, batch production faults are fewer. Most faults are reflected in the aspect of 'mechanical' or 'hydraulic' of the gearbox of about 5000-. The main manifestation of the 'machine' is abnormal wear of a mechanical transmission body; the main manifestation of the machine is the leak-tightness failure of the hydraulic system.
Aiming AT the fault distribution condition of the AT gearbox, the method for efficiently detecting the AT gearbox is necessary to be developed by combining the structural characteristics of the AT gearbox.
Disclosure of Invention
The invention aims to provide a test detection method of an AT (automatic transmission) so as to improve the fault-free mileage of the transmission.
The technical scheme adopted for achieving the purpose of the invention is that the test detection method of the AT gearbox comprises the following steps:
1) an idle power loss of the AT transmission under test is detected.
2) And under the hydraulic working condition, the practical performance test of each gear rack test is completed.
3) And under the mechanical working condition, completing each gear test.
4) And detecting whether the variation relation between the rotating speed, the flow and the pressure of the hydraulic pump is normal or not at different rotating speeds.
5) And checking whether the oil passages of all the operating piece machines are normal.
Further, detection and test are carried out through a test detection system, and the test detection system comprises a power assembly, a platform, an AT transmission support, a host control cabinet, a host operating platform and a hydraulic system, wherein the power assembly, the platform, the AT transmission support, the host control cabinet, the host operating platform and the hydraulic system are installed on the ground.
The AT transmission support and the auxiliary support which are mutually spaced are arranged on the platform, and the AT transmission to be tested is fixed on the AT transmission support and the auxiliary support.
The power assembly is connected with the AT transmission to be tested through a universal transmission shaft, the hydraulic system is connected with the hydraulic system operating platform, the power assembly is connected with the host control cabinet, and the host control cabinet is connected with the host operating platform.
Further, install on the platform and connect the oil box, connect the oil box to be located under the AT derailleur that is surveyed.
Further, in the step 1), a strain type torque sensor is adopted to measure torque, and no-load power loss is calculated through the torque and speed value.
Further, the method comprises the following steps: in step 2), the AT transmission to be tested is provided with an automatic transmission control module and a hydraulic oil bottom box, during testing, the automatic transmission control module is controlled, the automatic transmission control module finishes gear shifting operation, the automatic transmission control module feeds back operation data to the measurement and control system, the measurement and control system synchronously records the operation data fed back by the AT transmission to be tested and the operation data of the test detection system to the database, and the product quality is traced back and the product fault is judged by analyzing the data of the database.
Furthermore, the operation data fed back to the measurement and control system by the automatic gearbox control module comprises the actual gear of the measured AT transmission, the speed of the output shaft, a hydraulic pressure value and a temperature value. The operation data fed back to the database by the test detection system comprises the driving rotating speed, the torque and the power of the power assembly.
Further, in step 3), the AT transmission to be tested is not provided with an automatic transmission control module and a hydraulic system, a plurality of pipelines are connected between the hydraulic system and the AT transmission to be tested, during testing, a user inputs working parameters of the AT transmission to be tested through the host operating platform and the hydraulic system operating platform, the host operating platform sends instructions to the power assembly and the self controller of the AT transmission to be tested, the power assembly is started, the AT transmission to be tested works according to a set gear, the hydraulic system provides a hydraulic loop for the AT transmission to be tested and records pressure and flow of each loop, and the mechanical part, the hydraulic oil duct and the piston seal of the transmission body are checked and tested.
Further, hydraulic system includes oil tank, control system and valves, and hydraulic system provides hydraulic circuit including the manipulation return circuit of shifting gears, lubrication circuit, torque converter oil feed return circuit and total oil return circuit for the AT derailleur that is surveyed.
Further, the checking content of the step 5) is whether the oil way is smooth or not and whether the oil way is leaked or not.
The technical effects of the invention are undoubted, after the transmission components are assembled, the detection test of the transmission part and the hydraulic oil circuit seal is carried out, the main oil pressure, the control oil pressure, the lubricating oil pressure, the oil pressure of each clutch, the oil pressure of the input port of the hydraulic torque converter, the cooling oil flow of the radiator, the working pressure and flow test of the oil pump, the gear shifting test, the test of the rotating speed and the idling torque of the gearbox, the test of the transmission ratio of the gearbox and the like are tested, the processing and assembling quality of the whole machine is evaluated, the actual measurement is effective, and the comprehensive detection and the fault location before the transmission body of the gearbox leaves the factory can be carried out to the maximum extent.
Drawings
FIG. 1 is a schematic view of a test detection system;
FIG. 2 is a schematic view of a mechanical transmission portion and a hydraulic valve body portion of the AT transmission under test;
fig. 3 is a schematic diagram of a dedicated hydraulic pressure detection system.
In the figure: the device comprises a power assembly 1, a platform 2, an AT transmission support 3, a universal transmission shaft 4, a host control cabinet 5, a host operating platform 6, a hydraulic system 7, a hydraulic system operating platform 8, an auxiliary support 9, a tested AT transmission 10, a pipeline 11 and an oil receiving box 12.
Detailed Description
The present invention is further illustrated by the following examples, but it should not be construed that the scope of the above-described subject matter is limited to the following examples. Various substitutions and alterations can be made without departing from the technical idea of the invention and the scope of the invention is covered by the present invention according to the common technical knowledge and the conventional means in the field.
Example 1:
the test detection method disclosed by the embodiment performs detection and test through a test detection system, and the test detection system comprises a power assembly 1, a platform 2, an AT transmission support 3, a host control cabinet 5, a host operating platform 6 and a hydraulic system 7 which are installed on the ground.
Referring to fig. 1, the AT transmission support 3 and the auxiliary support 9 spaced apart from each other are mounted on the platform 2, and the AT transmission 10 to be tested is fixed to the AT transmission support 3 and the auxiliary support 9.
The power assembly 1 is connected with an AT transmission 10 to be tested through a universal transmission shaft 4, the hydraulic system 7 is connected with a hydraulic system operating platform 8, the power assembly 1 is connected with a host control cabinet 5, and the host control cabinet 5 is connected with a host operating platform 6. An oil receiving box 12 is installed on the platform 2, and the oil receiving box 12 is located right below the AT transmission 10 to be tested.
The method specifically comprises the following steps:
1) the no-load power loss of the AT transmission 10 under test is detected. Wherein, adopt strain gauge torque sensor to measure the moment of torsion, and the power that obtains through moment of torsion and speed value calculation can be regarded as the direct measurement value of no-load power loss. The strain type torque sensor has long-term stability and can avoid the complex operation of zero setting.
2) And under the hydraulic working condition, the practical performance test of each gear rack test is completed. Survey AT derailleur 10 and dispose automatic transmission control module (TCU) and hydraulic oil end box, during the experiment, control automatic transmission control module, automatic transmission control module accomplishes the operation of shifting gears, automatic transmission control module feeds back operating data to observing and controlling system, the operating data synchronous record of the operating data that is surveyed AT derailleur 10 feedback and experimental detecting system to the database is surveyed to observing and controlling system, through the data to the database carry out the analysis, trace back and product failure to product quality and judge. The operation data fed back to the measurement and control system by the automatic gearbox control module comprises the actual gear of the measured AT transmission 10, the speed of the output shaft, the hydraulic pressure value and the temperature value. The operation data fed back to the database by the test detection system comprises the driving rotating speed, the torque and the power of the power assembly 1.
3) And under the mechanical working condition, completing each gear test. The automatic transmission control module and the hydraulic system are not assembled on the AT transmission 10 to be tested, a plurality of pipelines 11 are connected between the hydraulic system 7 and the AT transmission 10 to be tested, during testing, a user inputs working parameters of the AT transmission 10 to be tested through the host operating platform 6 and the hydraulic system operating platform 8, the host operating platform 6 sends instructions to the power assembly 1 and the self controller of the AT transmission 10 to be tested, the power assembly 1 is started, the AT transmission 10 to be tested works according to a set gear, the hydraulic system 7 provides a hydraulic loop for the AT transmission 10 to be tested and records pressure and flow of each loop, and a mechanical part, a hydraulic oil duct and a piston seal of the transmission body are checked and tested. The hydraulic system 7 comprises an oil tank, a control system and a valve group, and the hydraulic system 7 provides a hydraulic loop for the AT transmission 10 to be tested, wherein the hydraulic loop comprises a gear shifting control loop, a lubricating loop, a torque converter oil inlet loop and a total oil return loop.
4) And detecting whether the variation relation between the rotating speed, the flow and the pressure of the hydraulic pump is normal or not at different rotating speeds. The outlet loop of the hydraulic pump is pressurized, the pressure can be adjusted, and the measurement and control software can form a rotating speed-flow and flow-pressure characteristic curve.
5) And checking whether the oil passages of all the operating piece machines are normal or not, wherein the checking contents are whether the oil passages are smooth or not and whether the oil passages are leaked or not.
It should be noted that, in the method of this embodiment, a single test and a test evaluation index are mainly performed on the mechanical transmission aspect of the AT transmission, and after the mechanical transmission part of the transmission is assembled, the transmission, the hydraulic pipeline, the piston seal and the oil pump performance of the transmission are comprehensively evaluated by performing a test detection on the hydraulic valve body part removed as shown in fig. 2 through a special hydraulic detection system inside the hydraulic system 7. Referring to fig. 3, a schematic diagram of the dedicated hydraulic pressure detection system is shown.
Example 2
The embodiment discloses a test detection method, which comprises the following steps:
1) the no-load power loss of the AT transmission 10 under test is detected.
2) And under the hydraulic working condition, the practical performance test of each gear rack test is completed.
3) And under the mechanical working condition, completing each gear test.
4) And detecting whether the variation relation between the rotating speed, the flow and the pressure of the hydraulic pump is normal or not at different rotating speeds.
5) And checking whether the oil passages of all the operating piece machines are normal.
Example 3
The main steps of this embodiment are the same as embodiment 2, and further, the detection and the test are performed by a test detection system, and the test detection system includes a power assembly 1 installed on the ground, a platform 2, an AT transmission support 3, a host control cabinet 5, a host console 6 and a hydraulic system 7.
Referring to fig. 1, the AT transmission support 3 and the auxiliary support 9 spaced apart from each other are mounted on the platform 2, and the AT transmission 10 to be tested is fixed to the AT transmission support 3 and the auxiliary support 9.
The power assembly 1 is connected with an AT transmission 10 to be tested through a universal transmission shaft 4, the hydraulic system 7 is connected with a hydraulic system operating platform 8, the power assembly 1 is connected with a host control cabinet 5, and the host control cabinet 5 is connected with a host operating platform 6.
Example 4
The main steps of this embodiment are the same as those of embodiment 3, and further, referring to fig. 1, an oil receiving box 12 is installed on the platform 2, and the oil receiving box 12 is located right below the AT transmission 10 to be tested.
Example 5
The main steps of the embodiment are the same as those of embodiment 2, and further, in step 1), a strain type torque sensor is adopted to measure torque, and no-load power loss is calculated through the torque and speed values.
Example 6
This embodiment main step is with embodiment 3, and is further, in step 2), it disposes automatic transmission control module and hydraulic oil bottom box to be surveyed AT derailleur 10, during the experiment, control automatic transmission control module, automatic transmission control module accomplishes the operation of shifting gears, automatic transmission control module feeds back operating data to observing and controlling system, the operating data synchronous record to the database of operating data and the experimental detecting system that is surveyed AT derailleur 10 feedback is observed and controlled to observing and controlling system, through the data to the database analysis, trace back and product failure to product quality and judge.
Example 7
The main steps of this embodiment are the same as those of embodiment 6, and further, the operation data fed back to the measurement and control system by the automatic transmission control module includes the actual gear position of the AT transmission 10 to be measured, the speed of the output shaft, the hydraulic pressure value and the temperature value. The operation data fed back to the database by the test detection system comprises the driving rotating speed, the torque and the power of the power assembly 1.
Example 8
The main steps of this embodiment are the same as embodiment 3, further, in step 3), the AT transmission 10 to be tested is not equipped with an automatic transmission control module and a hydraulic system, a plurality of pipelines 11 are connected between the hydraulic system 7 and the AT transmission 10 to be tested, during testing, a user inputs working parameters of the AT transmission 10 to be tested through the host operation console 6 and the hydraulic system operation console 8, the host operation console 6 sends an instruction to the power assembly 1 and the self controller of the AT transmission 10 to be tested, the power assembly 1 is started, the AT transmission 10 to be tested works according to a set gear, the hydraulic system 7 provides a hydraulic loop for the AT transmission 10 to be tested, and records pressure and flow of each loop, so as to check and test the mechanical part of the transmission body, the hydraulic oil duct and the piston seal.
Example 9
The main steps of this embodiment are the same as those of embodiment 8, and further, the hydraulic system 7 includes an oil tank, a control system and a valve group, and the hydraulic system 7 provides a hydraulic circuit including a shift control circuit, a lubrication circuit, a torque converter oil inlet circuit and a main oil return circuit to the AT transmission 10 to be tested.
Example 10
The main steps of the embodiment are the same as those of embodiment 2, and further, the content of the step 5) is to check whether the oil path is smooth or not and whether the oil path is leaked or not.
Claims (9)
1. A test detection method of an AT gearbox is characterized by comprising the following steps: the method comprises the following steps:
1) detecting an idle power loss of the AT transmission (10) under test;
2) under the hydraulic working condition, the practical performance test of each gear bench test is completed;
3) under the mechanical working condition, completing each gear test;
4) detecting whether the change relation between the rotating speed, the flow and the pressure of the hydraulic pump is normal or not at different rotating speeds;
5) and checking whether the oil passages of all the operating piece machines are normal.
2. The test detection method of the AT gearbox according to claim 1, characterized in that: the test system is used for detecting and testing, and comprises a power assembly (1), a platform (2), an AT transmission support (3), a host control cabinet (5), a host operating platform (6) and a hydraulic system (7), wherein the power assembly is arranged on the ground;
the AT transmission support (3) and the auxiliary support (9) which are mutually spaced are arranged on the platform (2), and the AT transmission (10) to be tested is fixed on the AT transmission support (3) and the auxiliary support (9);
the power assembly (1) is connected with the AT transmission (10) to be tested through a universal transmission shaft (4), the hydraulic system (7) is connected with the hydraulic system operating platform (8), the power assembly (1) is connected with the host control cabinet (5), and the host control cabinet (5) is connected with the host operating platform (6).
3. The test detection method of the AT gearbox according to claim 1, characterized in that: an oil receiving box (12) is installed on the platform (2), and the oil receiving box (12) is located under the AT transmission (10) to be tested.
4. The test detection method of the AT gearbox according to claim 2, characterized in that: in the step 1), a strain type torque sensor is adopted to measure torque, and no-load power loss is obtained through calculation of the torque and a speed value.
5. The test detection method of the AT gearbox according to claim 2, characterized in that: in step 2), the AT transmission (10) to be tested is provided with an automatic transmission control module and a hydraulic oil bottom box, during testing, the automatic transmission control module is controlled, the automatic transmission control module finishes gear shifting operation, the automatic transmission control module feeds back operating data to the measurement and control system, the measurement and control system synchronously records the operating data fed back by the AT transmission (10) to be tested and the operating data of the test detection system to the database, and the product quality is traced back and the product fault is judged by analyzing the data of the database.
6. The test detection method of the AT gearbox according to claim 5, characterized in that: the operation data fed back to the measurement and control system by the automatic gearbox control module comprise the actual gear of the measured AT transmission (10), the speed of an output shaft, a hydraulic pressure value and a temperature value; the operation data fed back to the database by the test detection system comprises the driving rotating speed, the torque and the power of the power assembly (1).
7. The test detection method of the AT gearbox according to claim 2, characterized in that: in the step 3), the automatic gearbox control module and the hydraulic system are not assembled on the tested AT transmission (10), a plurality of pipelines (11) are connected between the hydraulic system (7) and the tested AT transmission (10), during testing, a user inputs working parameters of the tested AT transmission (10) through the host operating console (6) and the hydraulic system operating console (8), the host operating console (6) sends instructions to the power assembly (1) and the self controller of the tested AT transmission (10), the power assembly (1) is started, the tested AT transmission (10) works according to a set gear, the hydraulic system (7) provides a hydraulic loop for the tested AT transmission (10) and records the pressure and the flow of each loop, and the mechanical part, the hydraulic oil duct and the piston seal of the transmission body are checked and tested.
8. The test detection method of the AT gearbox according to claim 7, characterized in that: the hydraulic system (7) comprises an oil tank, a control system and a valve group, and the hydraulic system (7) provides a hydraulic loop for the AT transmission (10) to be tested, wherein the hydraulic loop comprises a gear shifting control loop, a lubricating loop, a torque converter oil inlet loop and a total oil return loop.
9. The test detection method of the AT gearbox according to claim 1, characterized in that: and 5) checking whether the oil way is smooth or not and whether the oil way is leaked or not.
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| CN202110939216.4A CN113758705B (en) | 2021-08-16 | 2021-08-16 | Test detection method for AT gearbox |
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| CN202110939216.4A CN113758705B (en) | 2021-08-16 | 2021-08-16 | Test detection method for AT gearbox |
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| CN114414239A (en) * | 2021-12-21 | 2022-04-29 | 陕西法士特齿轮有限责任公司 | Gearbox rack calibration method, system, device, terminal equipment and storage medium |
| CN114486246A (en) * | 2022-03-02 | 2022-05-13 | 中国北方车辆研究所 | Hydraulic mechanical transmission device inspection and calibration system |
| CN115903759A (en) * | 2023-01-30 | 2023-04-04 | 陕西法士特齿轮有限责任公司 | Function detection device and method for transmission controller |
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