CN111323223A - Oil seal acceleration life testing device and method for new energy automobile - Google Patents
Oil seal acceleration life testing device and method for new energy automobile Download PDFInfo
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- CN111323223A CN111323223A CN201811527605.0A CN201811527605A CN111323223A CN 111323223 A CN111323223 A CN 111323223A CN 201811527605 A CN201811527605 A CN 201811527605A CN 111323223 A CN111323223 A CN 111323223A
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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 discloses a device and a method for testing the accelerated service life of an oil seal for a new energy automobile, wherein the device comprises an oil seal test box, a control unit and a motor, a rotating shaft is arranged in the oil seal test box, an output shaft of the motor is connected with the rotating shaft through a bearing, and an oil seal to be tested is arranged on the outer side of the bearing and fixedly arranged on the side wall of the oil seal test box during testing; the control unit is used for receiving and storing a rotating speed-time curve of the motor rotating speed which is edited and input by a user and changes along with time, and controlling the rotating speed of the motor in a frequency conversion mode according to the rotating speed-time curve; the motor is connected with the control unit and the rotating speed of the motor is controlled by the control unit. The invention can simulate the actual use environment to perform the life test in the early stage of oil seal design selection, and can greatly improve the use reliability of the oil seal.
Description
Technical Field
The invention relates to the technical field of automobile transmission systems, in particular to a device and a method for testing the accelerated service life of an oil seal for a new energy automobile.
Background
The main components of the new energy transmission system are a gear box and a motor, the protection grade requirement of the transmission system of each mainstream automobile factory in China is not lower than IP67, the use protection grade requirement of the gear box and the motor is continuously improved, however, the rotary sealing of the gear box and the motor is realized through an oil seal, so the service life of the oil seal directly determines the protection grade of the gear box and the motor, the service life of the gear box and the motor is directly influenced, and the oil seal is more and more paid attention by customers. The service life of the oil seal is related to design, process and materials, and also has great relation with the application environment, such as linear velocity, temperature, installation precision, lubrication and the like. The service life test can be carried out by simulating the environment of actual use in the earlier stage of oil seal design selection, and the reliability of oil seal use can be greatly improved.
Disclosure of Invention
The invention provides a device and a method for testing the accelerated service life of an oil seal for a new energy automobile, which are used for solving the technical problem that the existing oil seal testing device cannot simulate actual working conditions.
In order to solve the technical problems, the technical scheme provided by the invention is as follows:
an oil seal accelerated life testing device for a new energy automobile comprises an oil seal test box, a control unit and a motor, wherein a rotating shaft is arranged in the oil seal test box, an output shaft of the motor is connected with the rotating shaft through a bearing, and an oil seal to be tested is arranged on the outer side of the bearing and fixedly arranged on the side wall of the oil seal test box during testing;
the control unit is used for receiving and storing a rotating speed-time curve of the rotating speed of the motor, which is edited and input by a user, along with the change of time, and controlling the rotating speed of the motor in a variable frequency mode according to the rotating speed-time curve; the motor is connected with the control unit and the rotating speed of the motor is controlled by the control unit.
As a further improvement of the device of the invention:
the epaxial dress of pivot is equipped with oil pump gear, and the oil blanket proof box includes and installs the stirring section and the steady section that the direction arranged and communicate each other along the pivot, and oil pump gear is arranged in stirring the section when changeing epaxial oil pump gear and installing in the oil blanket proof box.
The radial cross-sectional area of the stirring section is larger than that of the stationary section.
The stirring section and the stabilizing section are both cuboids and are communicated through a circular channel.
The side wall of the oil seal test box is arranged to be a transparent shell, and oil liquid scale marks are arranged on the transparent shell in a marking mode.
The oil seal test box is also provided with a temperature sensor, the temperature sensor collects oil temperature values in the oil seal test box in real time and sends the oil temperature values to the control unit, the control unit receives the oil temperature values and detects whether the oil temperature values exceed a threshold range, and when the oil temperature values exceed the threshold range, oil temperature alarm signals are generated.
The oil seal test box is also provided with an air pressure sensor and a vent plug, the air pressure sensor collects air pressure values in the oil seal test box in real time and sends the air pressure values to the control unit, the control unit receives the air pressure values and detects whether the air pressure values exceed a threshold range, and when the air pressure values exceed the threshold range, an air pressure alarm signal is generated.
The device also comprises a data display, wherein the data display is connected with the control unit and used for receiving a rotating speed-time curve, a real-time rotating speed of the motor, a real-time oil temperature numerical value and a real-time air pressure numerical value, service life and cycle times sent by the control unit;
the data display is also connected with the storage unit and used for storing a rotating speed-time curve, the real-time rotating speed of the motor, a real-time oil temperature numerical value and a real-time air pressure numerical value, the service life and the cycle number.
The data display also receives and displays the oil temperature alarm signal and/or the air pressure alarm signal sent by the control unit.
The invention also provides a method for testing the service life of the oil seal by adopting the oil seal accelerated service life testing device for the new energy automobile, which comprises the following steps: installing an oil seal to be tested at the outer side of the bearing and fixedly installing the oil seal to be tested on the side wall of the oil seal test box;
measuring the data of the change of the motor rotating speed along with time in the actual using environment, editing the data into a rotating speed-time curve of the change of the motor rotating speed along with time, and inputting the rotating speed-time curve into a control unit, wherein the control unit controls the rotating speed of the motor in a frequency conversion mode according to the rotating speed-time curve;
and a data display and a storage unit are adopted to display and store a rotating speed-time curve, the real-time rotating speed of the motor, a real-time oil temperature numerical value and a real-time air pressure numerical value, the service life and the cycle number.
The invention has the following beneficial effects:
1. according to the oil seal accelerated life testing device and the testing method for the new energy automobile, the motor is connected with the control unit, the rotating speed of the motor is controlled through the preset rotating speed-time curve of the control unit, the actual using environment is simulated to carry out the oil seal life test, the purpose of test circulation is achieved, and the testing result is more accurate.
2. In a preferred scheme, the oil seal test box is provided with an oil pump gear through a rotating shaft and used for stirring lubricating oil in the oil seal test box so as to simulate the actual lubricating condition; can carry out motor oil blanket experiment, also can carry out gear box oil blanket experiment, the range of application is wider.
In addition to the objects, features and advantages described above, other objects, features and advantages of the present invention are also provided. The present invention will be described in further detail below with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is an exploded schematic view of an oil seal accelerated life testing device for a new energy vehicle according to a preferred embodiment of the present invention;
fig. 2 is an assembly schematic diagram of an oil seal accelerated life testing device for a new energy automobile according to a preferred embodiment of the invention;
FIG. 3 is a schematic diagram of the side wall structure of the oil seal experimental box of the preferred embodiment of the present invention;
FIG. 4 is a flow chart illustrating a testing method according to a preferred embodiment of the present invention.
The reference numerals in the figures denote:
1. a control unit; 2. an oil seal test box; 3. a rotating shaft; 4. a bearing; 5. an air pressure sensor; 6. a temperature sensor; 7. a motor; 8. oil sealing; 9. a data display; 10. a vent plug; 11. oil liquid scale marks; 12. a transparent shell.
Detailed Description
The embodiments of the invention will be described in detail below with reference to the drawings, but the invention can be implemented in many different ways as defined and covered by the claims.
Referring to fig. 1 and 2, the oil seal accelerated life testing device for the new energy automobile comprises an oil seal test box 2, a control unit 1 and a motor 7, wherein a rotating shaft 3 is arranged in the oil seal test box 2, an output shaft of the motor 7 is connected with the rotating shaft 3 through a bearing 4, two ends of the rotating shaft 3 are subjected to radial load through the bearing 4, a shell of the motor 7 is fixedly connected with the oil seal test box 2, and an oil seal 8 to be tested is arranged on the outer side of the bearing 4 and fixedly arranged on the side wall of the oil seal test box 2 during testing. The control unit 1 is used for receiving and storing a rotating speed-time curve of the motor rotating speed changing along with time, which is edited and input by a user, and controlling the rotating speed of the motor 7 in a variable frequency mode according to the rotating speed-time curve; the motor 7 is connected with the control unit 1 and the rotating speed of the motor is controlled by the control unit 1. Through linking to each other motor 7 and control unit 1, through predetermineeing the rotational speed-time curve control motor rotational speed of control unit 1, the simulation actual service environment carries out the oil blanket life test, reaches the experimental circulation purpose, and the test result is more accurate.
In this embodiment, the oil pump gear is installed on the rotating shaft 3, the oil seal test box 2 includes a stirring section and a stabilizing section which are arranged along the installation direction of the rotating shaft 3 and are communicated with each other, the stirring section and the stabilizing section are cuboids, and the stirring section and the stabilizing section are communicated with each other through a circular channel. The oil pump gear on the rotating shaft 3 is positioned in the stirring section when the oil pump gear is arranged in the oil seal test box 2. The radial cross-sectional area of the stirring section is larger than that of the stationary section. The rotating shaft 3 is provided with an oil pump gear and is used for stirring lubricating oil in the oil seal test box 2 so as to simulate the actual lubricating condition. Referring to fig. 3, the side wall of the oil seal test box 2 is set to be a transparent shell 12, oil scale marks 11 are arranged on the transparent shell 12 in a marking mode, oil changes are observed in real time, and the actual test conditions are conveniently known.
In the embodiment, the oil seal test box 2 is a constant temperature test box for ensuring that the test oil temperature is relatively stable; the oil seal test box 2 is also provided with a temperature sensor 6, an air pressure sensor 5 and a vent plug 10. The temperature sensor 6 collects the oil temperature value in the oil seal test box 2 in real time and sends the oil temperature value to the control unit 1, the control unit 1 receives the oil temperature value and detects whether the oil temperature value exceeds a threshold range, and when the oil temperature value exceeds the threshold range, an oil temperature alarm signal is generated and sent to the data display 9 for displaying and alarming. The air pressure sensor 5 collects air pressure values in the oil seal test box 2 in real time and sends the air pressure values to the control unit 1, the control unit 1 receives the air pressure values and detects whether the air pressure values exceed a threshold range, and when the air pressure values exceed the threshold range, air pressure alarm signals are generated and sent to the data display 9 for displaying and alarming. The vent plug 10 ensures that the pressure in the oil seal test box 2 does not exceed the standard. In the experimental process, the control unit 1 also records the service life of the oil seal and the cycle number of the experiment according to the rotating speed-time curve and the experimental process. The data display 9 is connected with the control unit 1, receives, displays and stores the rotating speed-time curve sent by the control unit 1, the real-time rotating speed of the motor 7, the real-time oil temperature numerical value and air pressure numerical value, the service life time and the cycle number, and further can display the stored data in a report file with a format template so as to generate an experimental report.
The device can be used for motor oil seal tests and gear box oil seal tests. When the motor oil seal test is carried out, lubricating oil is not added in the oil seal test box 2, and other conditions are consistent. Whether oil leakage and oil leakage of the oil seal 8 occur or not is observed in the test process, whether the lip of the oil seal 8 is abnormal or not is observed, the oil level value is obtained, the vent plug 10 is disassembled, the vent plug hole is connected with an air tightness tester, and the air pressure loss or leakage is tested to evaluate the test result.
Referring to fig. 4, the embodiment further provides a method for testing the service life of an oil seal by using the oil seal accelerated life testing device for a new energy vehicle, which includes the following steps:
s1, installing the oil seal 8 to be tested on the outer side of the bearing 4 and fixedly installing the oil seal on the side wall of the oil seal test box 2;
s2, measuring the data of the change of the motor rotating speed along with the time in the actual using environment, editing the data into a rotating speed-time curve of the change of the motor rotating speed along with the time, inputting the curve into the control unit 1, and controlling the rotating speed of the motor 7 by the control unit 1 according to the rotating speed-time curve in a frequency conversion mode;
and S3, displaying and storing the rotating speed-time curve, the real-time rotating speed of the motor 7, the real-time oil temperature numerical value and air pressure numerical value, the service life and the cycle number by using the data display 9 and the storage unit.
In conclusion, the invention can simulate the actual use environment to carry out the service life test in the early stage of oil seal design selection, and can greatly improve the use reliability of the oil seal.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The oil seal acceleration service life testing device for the new energy automobile is characterized by comprising an oil seal test box (2), a control unit (1) and a motor (7), wherein a rotating shaft (3) is arranged in the oil seal test box (2), an output shaft of the motor (7) is connected with the rotating shaft (3) through a bearing (4), and an oil seal (8) to be tested is arranged on the outer side of the bearing (4) and fixedly arranged on the side wall of the oil seal test box (2) during testing;
the control unit (1) is used for receiving and storing a rotating speed-time curve of the motor rotating speed which is edited and input by a user and changes along with time, and controlling the rotating speed of the motor (7) according to the rotating speed-time curve in a frequency conversion mode; the motor (7) is connected with the control unit (1) and the rotating speed of the motor is controlled by the control unit (1).
2. The oil seal accelerated life testing device for the new energy automobile as claimed in claim 1, wherein an oil pump gear is installed on the rotating shaft (3), the oil seal test box (2) comprises a stirring section and a stabilizing section which are arranged along the installation direction of the rotating shaft (3) and are communicated with each other, and the oil pump gear is located in the stirring section when the oil pump gear on the rotating shaft (3) is installed in the oil seal test box (2).
3. The oil seal accelerated life test device for the new energy automobile as claimed in claim 2, wherein a radial sectional area of the agitating section is larger than a radial sectional area of the stationary section.
4. The oil blanket acceleration life test device for the new energy automobile of claim 3, characterized in that the stirring section and the stationary section are cuboids, and the stirring section and the stationary section are communicated through a circular channel.
5. The oil seal accelerated life testing device for the new energy automobile is characterized in that a transparent shell (12) is arranged on the side wall of the oil seal test box (2), and oil scale marks (11) are marked on the transparent shell (12).
6. The oil seal acceleration life testing device for the new energy automobile as claimed in any one of claims 1 to 5, wherein a temperature sensor (6) is further disposed on the oil seal test box (2), the temperature sensor (6) collects an oil temperature value in the oil seal test box (2) in real time and sends the oil temperature value to the control unit (1), the control unit (1) receives the oil temperature value and detects whether the oil temperature value exceeds a threshold range, and when the oil temperature value exceeds the threshold range, an oil temperature alarm signal is generated.
7. The oil seal acceleration life testing device for the new energy automobile as claimed in claim 6, wherein an air pressure sensor (5) and a vent plug (10) are further arranged on the oil seal test box (2), the air pressure sensor (5) collects an air pressure value in the oil seal test box (2) in real time and sends the air pressure value to the control unit (1), the control unit (1) receives the air pressure value and detects whether the air pressure value exceeds a threshold range, and when the air pressure value exceeds the threshold range, an air pressure alarm signal is generated.
8. The oil seal accelerated life testing device for the new energy automobile is characterized by further comprising a data display (9), wherein the data display (9) is connected with the control unit (1) and receives a rotating speed-time curve, a real-time rotating speed of the motor (7), a real-time oil temperature numerical value and a real-time air pressure numerical value, a service life and cycle times, which are sent by the control unit (1);
the data display (9) is also connected with a storage unit and used for storing the rotating speed-time curve, the real-time rotating speed of the motor (7), the real-time oil temperature numerical value and air pressure numerical value, the service life and the cycle number.
9. The oil seal acceleration life testing device for the new energy automobile as claimed in claim 8, wherein the data display (9) further receives and displays an oil temperature alarm signal and/or an air pressure alarm signal sent by the control unit (1).
10. A method for testing the service life of an oil seal by using the oil seal accelerated service life testing device for the new energy automobile as claimed in any one of claims 1 to 9, characterized by comprising the following steps: installing an oil seal to be tested on the outer side of the bearing (4) and fixedly installing the oil seal to be tested on the side wall of the oil seal test box (2);
measuring data of the change of the motor rotating speed along with time in an actual using environment, editing the data into a rotating speed-time curve of the change of the motor rotating speed along with time, and inputting the rotating speed-time curve into the control unit (1), wherein the control unit (1) controls the rotating speed of the motor (7) in a frequency conversion mode according to the rotating speed-time curve;
and a data display (9) and a storage unit are adopted to display and store the rotating speed-time curve, the real-time rotating speed of the motor (7), the real-time oil temperature numerical value and air pressure numerical value, the service life and the cycle number.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811527605.0A CN111323223B (en) | 2018-12-13 | 2018-12-13 | Oil seal acceleration life testing device and method for new energy automobile |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811527605.0A CN111323223B (en) | 2018-12-13 | 2018-12-13 | Oil seal acceleration life testing device and method for new energy automobile |
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| CN111323223A true CN111323223A (en) | 2020-06-23 |
| CN111323223B CN111323223B (en) | 2022-03-15 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117191387A (en) * | 2023-09-11 | 2023-12-08 | 昆山健博密封件科技有限公司 | Oil seal detection method and system |
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| CN111323223B (en) | 2022-03-15 |
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