CN113758705B - Test detection method for AT gearbox - Google Patents
Test detection method for AT gearbox Download PDFInfo
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- CN113758705B CN113758705B CN202110939216.4A CN202110939216A CN113758705B CN 113758705 B CN113758705 B CN 113758705B CN 202110939216 A CN202110939216 A CN 202110939216A CN 113758705 B CN113758705 B CN 113758705B
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- 238000012360 testing method Methods 0.000 title claims abstract description 60
- 238000001514 detection method Methods 0.000 title claims abstract description 37
- 230000005540 biological transmission Effects 0.000 claims abstract description 85
- 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 16
- 238000000034 method Methods 0.000 claims description 6
- 238000005461 lubrication Methods 0.000 claims description 5
- 238000001816 cooling Methods 0.000 abstract description 2
- 238000012545 processing Methods 0.000 abstract description 2
- 239000010687 lubricating oil Substances 0.000 abstract 1
- 230000009347 mechanical transmission Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000004075 alteration Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000005299 abrasion Methods 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
- 238000011156 evaluation Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007774 longterm Effects 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
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The invention discloses a test detection method of an AT gearbox, which comprises the following steps: 1) The idle power loss of the measured AT transmission 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, finishing the test of each gear. 4) Under different rotation speeds, detecting whether the change relation between the rotation speed and the flow and the pressure of the hydraulic pump is normal or not. 5) Checking whether all the oil paths of the operating parts are normal. After the transmission part is assembled, the transmission part and the hydraulic oil way seal are subjected to detection tests, the main oil pressure, the control oil pressure, the lubricating oil pressure, the clutch oil pressure, the hydraulic torque converter input port oil pressure, the radiator cooling oil flow are tested, the working pressure and flow of the oil pump are tested, the gear shifting test, the speed and idle torque of the gearbox are tested, the transmission ratio of the gearbox is tested, the processing and assembling quality of the whole machine is evaluated, and the complete detection and fault positioning before delivery of the gearbox transmission body can be performed to the greatest extent.
Description
Technical Field
The invention relates to the field of gearbox detection, in particular to a test detection method of an AT gearbox.
Background
AT present, an AT gearbox gradually enters the market of medium and heavy commercial vehicles such as engineering machinery, special vehicles and the like. The high reliability requirements of special vehicles necessitate that the AT gearbox must improve the quality of the product to the greatest possible extent.
The AT gearbox is a comprehensive transmission gearbox integrating machine, electricity and liquid. From the current gearbox fault statistics, the software and hardware of the gearbox in the aspect of electricity are verified by experiments, and the batch production faults are fewer. Most faults show the mechanical or hydraulic aspects of the gearbox in the range of 5000-20000 km. The main manifestation of the machine is the abnormal abrasion of the mechanical transmission body; the main manifestation of the machine is a leak tightness failure of the hydraulic system.
Aiming AT the fault distribution condition of the AT gearbox, and combining the structural characteristics of the AT gearbox, it is necessary to develop a method capable of efficiently detecting the AT gearbox.
Disclosure of Invention
The invention aims to provide a test detection method of an AT gearbox so as to improve the fault-free mileage of the gearbox.
The technical scheme adopted for realizing the purpose of the invention is that the test detection method of the AT gearbox comprises the following steps:
1) The idle power loss of the measured AT transmission 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, finishing the test of each gear.
4) Under different rotation speeds, detecting whether the change relation between the rotation speed and the flow and the pressure of the hydraulic pump is normal or not.
5) Checking whether all the oil paths of the operating parts are normal.
Further, the detection and testing is performed by a test detection system that includes a powertrain, a platform, an AT transmission mount, a main machine control cabinet, a main machine console, and a hydraulic system mounted 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 tested AT speed changer through a universal transmission shaft, the hydraulic system is connected with a hydraulic system operating platform, the power assembly is connected with a host control cabinet, and the host control cabinet is connected with a host operating platform.
Further, an oil receiving box is arranged on the platform and is positioned right below the tested AT speed changer.
Further, in the step 1), a strain type torque sensor is adopted to measure torque, and no-load power loss is obtained through calculation of torque and speed values.
Further, in step 2), the tested AT transmission is configured 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 completes 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 tested AT transmission and the operation data of the test detection system to the database, and the product quality is traced and the product failure is judged by analyzing the data of the database.
Further, the operation data fed back to the measurement and control system by the automatic gearbox control module comprises the actual gear, output shaft speed, hydraulic pressure value and temperature value of the measured AT transmission. The operation data fed back to the database by the test detection system comprises the driving rotation speed, torque and power of the power assembly.
Further, in step 3), the automatic gearbox control module and the hydraulic system are not assembled on the tested AT transmission, a plurality of pipelines are connected between the hydraulic system and the tested AT transmission, during test, a user inputs working parameters of the tested AT transmission 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 tested AT transmission, the power assembly is started, the tested AT transmission works according to a set gear, the hydraulic system provides a hydraulic circuit for the tested AT transmission and records pressure and flow of each circuit, and the mechanical part of the transmission body, the hydraulic oil duct and the piston seal are checked and tested.
Further, the hydraulic system comprises an oil tank, a control system and a valve group, and the hydraulic system provides a hydraulic circuit for the tested AT transmission, wherein the hydraulic circuit comprises a gear shifting control circuit, a lubrication circuit, a torque converter oil inlet circuit and a total oil return circuit.
Further, the inspection of step 5) is whether the oil path is unblocked and whether the oil path is leaked.
The invention has the technical effects that the invention is undoubtedly used for carrying out detection tests on the transmission part and the hydraulic oil way seal after mainly assembling the transmission part, testing the main oil pressure, the control oil pressure, the lubrication oil pressure, the clutch oil pressure, the hydraulic torque converter input port oil pressure and the radiator cooling oil flow, and evaluating the processing and assembling quality of the whole machine, such as working pressure and flow test of an oil pump, gear shifting test, gearbox rotating speed and idle torque test, gearbox transmission ratio test and the like, so that the actual measurement is effective, and the invention can carry out comprehensive detection and fault positioning before leaving the factory on the gearbox transmission body to the greatest extent.
Drawings
FIG. 1 is a schematic diagram of a test detection system;
FIG. 2 is a schematic illustration of a mechanical transmission portion and hydraulic valve body portion of an 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 speed changer 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 speed changer 10, a pipeline 11 and an oil receiving box 12.
Detailed Description
The present invention is further described below with reference to examples, but it should not be construed that the scope of the above subject matter of the present invention is limited to the following examples. Various substitutions and alterations are made according to the ordinary skill and familiar means of the art without departing from the technical spirit of the invention, and all such substitutions and alterations are intended to be included in the scope of the invention.
Example 1:
the test detection method disclosed in the embodiment performs detection and test by 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 operation table 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 measured is fixed to the AT transmission support 3 and the auxiliary support 9.
The power assembly 1 is connected with the tested AT speed changer 10 through the 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. An oil receiving box 12 is arranged on the platform 2, and the oil receiving box 12 is positioned right below the tested AT speed changer 10.
The method specifically comprises the following steps:
1) The idle power loss of the measured AT transmission 10 is detected. The torque is measured by a strain type torque sensor, and the power obtained through calculation of the torque and the speed value can be regarded as a direct measurement value of no-load power loss. The strain type torque sensor has long-term stability and can avoid complicated zeroing operation.
2) And under the hydraulic working condition, the practical performance test of each gear rack test is completed. The automatic transmission control module is used for controlling the automatic transmission control module to complete 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 measured AT transmission 10 and the operation data of the test detection system to the database, and the product quality is traced and judged by analyzing the data of the database. The operation data fed back to the measurement and control system by the automatic gearbox control module comprises the actual gear, output shaft speed, hydraulic pressure value and temperature value of the measured AT transmission 10. The operation data fed back to the database by the test detection system comprises the driving rotation speed, torque and power of the power assembly 1.
3) And under the mechanical working condition, finishing the test of each gear. The tested AT speed changer 10 is not provided with an automatic speed changer control module and a hydraulic system, a plurality of pipelines 11 are connected between the hydraulic system 7 and the tested AT speed changer 10, during test, a user inputs working parameters of the tested AT speed changer 10 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 tested AT speed changer 10, the power assembly 1 is started, the tested AT speed changer 10 works according to a set gear, the hydraulic system 7 provides a hydraulic loop for the tested AT speed changer 10 and records pressure and flow of each loop, and the mechanical part of the speed changer body, the hydraulic oil duct and the piston seal 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 circuit for the tested AT transmission 10, wherein the hydraulic circuit comprises a gear shifting control circuit, a lubrication circuit, a torque converter oil inlet circuit and a total oil return circuit.
4) Under different rotation speeds, detecting whether the change relation between the rotation speed and the flow and the pressure of the hydraulic pump is normal or not. The pressure is applied to the outlet loop of the hydraulic pump, the pressure can be adjusted, and the measurement and control software can form a rotating speed-flow and flow-pressure characteristic curve.
5) Checking whether all the oil ways of the operating parts are normal or not, and checking whether the oil ways are smooth or not and whether the oil ways 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 gearbox, after the mechanical transmission part of the gearbox is assembled, the transmission, the hydraulic pipeline, the piston seal and the oil pump performance of the gearbox are comprehensively evaluated through the test detection of the hydraulic valve body part removed in fig. 2 by the 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 test detection method disclosed by the embodiment comprises the following steps:
1) The idle power loss of the measured AT transmission 10 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, finishing the test of each gear.
4) Under different rotation speeds, detecting whether the change relation between the rotation speed and the flow and the pressure of the hydraulic pump is normal or not.
5) Checking whether all the oil paths of the operating parts are normal.
Example 3
The main steps of this embodiment are the same as those of embodiment 2, and further, the detection and the test are performed by a test detection system including a power assembly 1, a platform 2, an AT transmission support 3, a main machine control cabinet 5, a main machine operation table 6 and a hydraulic system 7 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 measured is fixed to the AT transmission support 3 and the auxiliary support 9.
The power assembly 1 is connected with the tested AT speed changer 10 through the 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.
Example 4
The main steps of this embodiment are the same as those of embodiment 3, further referring to fig. 1, an oil receiving box 12 is installed on the platform 2, and the oil receiving box 12 is located under the measured AT transmission 10.
Example 5
The main steps of this embodiment are the same as those of embodiment 2, and further, in step 1), a strain type torque sensor is used to measure torque, and no-load power loss is obtained through calculation of torque and speed values.
Example 6
In step 2), the measured AT transmission 10 is configured with an automatic gearbox control module and a hydraulic oil bottom box, and during testing, the automatic gearbox control module is controlled to complete gear shifting operation, the automatic gearbox control module feeds back operation data to a measurement and control system, the measurement and control system synchronously records the operation data fed back by the measured AT transmission 10 and the operation data of a test detection system to a database, and the product quality is traced and the product failure is judged by analyzing the data of the database.
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 gearbox control module includes the actual gear, output shaft speed, hydraulic pressure value and temperature value of the measured AT transmission 10. The operation data fed back to the database by the test detection system comprises the driving rotation speed, torque and power of the power assembly 1.
Example 8
In step 3), the automatic gearbox control module and the hydraulic system are not assembled in the tested AT transmission 10, a plurality of pipelines 11 are connected between the hydraulic system 7 and the tested AT transmission 10, during test, a user inputs working parameters of the tested AT transmission 10 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 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 hydraulic circuits for the tested AT transmission 10 and records pressure and flow of each circuit, and the mechanical parts, the hydraulic oil ducts and the piston seals of the transmission body are checked and tested.
Example 9
The main steps of this embodiment are the same as those of embodiment 8, 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 gear shift control circuit, a lubrication circuit, a torque converter oil inlet circuit and a total oil return circuit for the measured AT transmission 10.
Example 10
The main steps of this embodiment are the same as those of embodiment 2, and further, the inspection contents of step 5) are whether the oil path is unblocked and whether the oil path leaks.
Claims (4)
1. A test detection method of an AT gearbox is characterized by comprising the following steps of: the test detection system is used for detection and test, 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) which are arranged on the ground;
the AT transmission support (3) and the auxiliary support (9) which are spaced from each other 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 tested AT speed changer (10) through the 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); the hydraulic system (7) comprises an oil tank, a control system and a valve group, and the hydraulic system (7) provides a hydraulic circuit for the tested AT transmission (10) and comprises a gear shifting control circuit, a lubrication circuit, a torque converter oil inlet circuit and a total oil return circuit;
the test detection method comprises the following steps:
1) Detecting an idle power loss of the measured AT transmission (10);
2) Under the hydraulic working condition, the practical performance test of each gear rack test is completed; the automatic transmission control system comprises a tested AT speed changer (10), a hydraulic oil bottom box, a gear shifting control module, a measurement and control system, a control system and a control system, wherein the tested AT speed changer (10) is provided with the automatic transmission control module and the hydraulic oil bottom box, during test, the automatic transmission control module controls the automatic transmission control module to complete 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 tested AT speed changer (10) and the operation data of the test detection system to a database, and the product quality is traced and the product failure is judged through analyzing the data of the database; the operation data fed back to the measurement and control system by the automatic gearbox control module comprises the actual gear, output shaft speed, hydraulic pressure value and temperature value of the measured AT (10); the operation data fed back to the database by the test detection system comprises the driving rotation speed, torque and power of the power assembly (1);
3) Under the mechanical working condition, each gear test is completed; the automatic transmission control system comprises a tested AT transmission (10), an automatic transmission control module and a hydraulic valve body, wherein a plurality of pipelines (11) are connected between a hydraulic system (7) and the tested AT transmission (10), when in test, a user inputs working parameters of the tested AT transmission (10) through a host operating table (6) and a hydraulic system operating table (8), the host operating table (6) sends instructions to a power assembly (1) and a 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 pressure and flow of each loop, and the mechanical part, a hydraulic oil duct and a piston seal of the transmission body are checked and tested;
4) Detecting whether the change relation between the rotating speed and the flow and the pressure of the hydraulic pump is normal or not under different rotating speeds;
5) Checking whether all the oil paths of the operating parts are normal.
2. The method for testing and detecting an AT gearbox according to claim 1, wherein: an oil receiving box (12) is arranged on the platform (2), and the oil receiving box (12) is positioned under the tested AT speed changer (10).
3. The method for testing and detecting an AT gearbox according to claim 1, wherein: and (3) measuring torque by adopting a strain type torque sensor in the step (1), and calculating the idle power loss through torque and speed values.
4. The method for testing and detecting an AT gearbox according to claim 1, wherein: the checking content of the step 5) is whether the oil way is unblocked and whether the oil way is leaked.
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| Application Number | Priority Date | Filing Date | Title |
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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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| CN113758705B true CN113758705B (en) | 2023-11-07 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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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 |
| CN114486246B (en) * | 2022-03-02 | 2023-06-30 | 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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| CN112326237A (en) * | 2020-06-05 | 2021-02-05 | 南京农业大学 | Performance detection test bed for hydraulic mechanical continuously variable transmission |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| ITMO20110296A1 (en) * | 2011-11-18 | 2013-05-19 | Cnh Italia Spa | METHOD FOR TESTING A HYDROSTATIC TRANSMISSION. |
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