CN113701949B - Air compressor oil seal tightness and reliability testing method - Google Patents
Air compressor oil seal tightness and reliability testing method Download PDFInfo
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- CN113701949B CN113701949B CN202110966532.0A CN202110966532A CN113701949B CN 113701949 B CN113701949 B CN 113701949B CN 202110966532 A CN202110966532 A CN 202110966532A CN 113701949 B CN113701949 B CN 113701949B
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- air compressor
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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
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/02—Lubrication
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B51/00—Testing machines, pumps, or pumping installations
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
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- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Control Of Positive-Displacement Pumps (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
The invention relates to the technical field of automobile parts, and discloses a method for testing the tightness and reliability of an oil seal of an air compressor, which comprises the following steps: calculating the horizontal running engine oil level and the highest engine oil level of an air compressor crankcase, arranging a transparent pipe, arranging two liquid level lines corresponding to the horizontal running engine oil level and the highest engine oil level on the transparent pipe, adjusting a switch valve of an oil return box on a test bench to enable engine oil to be respectively located at the heights of the two liquid level lines, and performing oil leakage test. The method for testing the tightness and the reliability of the air compressor oil seal can accurately feed back the actual assembly and the operation condition of the air compressor assembly on the whole vehicle, thereby truly feeding back the tightness and the reliability of the air compressor assembly oil seal.
Description
Technical Field
The invention relates to the technical field of automobile parts, in particular to a method for testing the tightness and reliability of an oil seal of an air compressor.
Background
At present, the tightness of the air compressor assembly is checked by carrying out a static tightness test on the air compressor assembly, and the test method cannot accurately feed back the tightness of an oil seal in the air compressor assembly under the dynamic working condition, and cannot accurately feed back the tightness of the oil seal of the air compressor assembly when the whole vehicle turns up and down slopes and left and right, so that the risk of oil leakage of the air compressor assembly on the whole vehicle is likely.
Disclosure of Invention
The invention aims to overcome the defects of the technology, and provides a method for testing the tightness and reliability of an air compressor oil seal, which can accurately feed back the actual assembly and operation conditions of an air compressor assembly on a whole vehicle, thereby truly feeding back the tightness and reliability of the air compressor assembly oil seal.
In order to achieve the above purpose, the air compressor oil seal tightness and reliability testing method designed by the invention comprises the following steps:
a) Simulating the actual assembly of the air compressor assembly on the whole vehicle through computer three-dimensional simulation software, and calculating the horizontal running engine oil level H1 of the crankcase of the air compressor during the horizontal running of the real vehicle, and the highest engine oil level H2 under various special road conditions such as ascending and descending slopes, left and right turning and the like;
b) A transparent pipe is arranged on an air compressor crankcase on the test bed, two ends of the transparent pipe are communicated with an engine oil channel in the air compressor crankcase, and two ends of the transparent pipe are arranged up and down;
c) A first liquid level line and a second liquid level line are arranged on the transparent pipe, the first liquid level line corresponds to the horizontal running engine oil level H1, and the second liquid level line corresponds to the highest engine oil level H2;
d) Adjusting a switch valve of an oil return box on a test bench to enable the liquid level in the transparent pipe to reach the first liquid level line and enter a horizontal running working condition, wherein the liquid level of engine oil in an air compressor crankcase is the horizontal running engine oil level H1 at the moment, then enabling the air compressor assembly to run on the test bench at a rated rotation speed, recording initial time t0 and ending time t1, observing whether oil leakage exists in an oil seal of the air compressor assembly in a time period from t0 to t1, stopping a test and carrying out disassembly analysis on the air compressor assembly if the oil leakage is bad, and carrying out design checking on the oil seal if the oil leakage is not bad, and entering a step E);
e) Increasing the oil inlet pressure in the air compressor assembly, slowly increasing the liquid level in the transparent pipe until reaching the second liquid level line, enabling the oil level in the air compressor crankcase to be the highest oil level H2, entering special road condition working conditions, enabling the air compressor assembly to run on a test bench at a rated rotation speed, recording the starting time t2 and the ending time t3, observing whether oil leakage exists in an oil seal when the air compressor assembly works in a time period from t2 to t3, stopping a test and carrying out disassembly analysis on the air compressor assembly if the oil leakage is bad, and carrying out design checking on the oil seal if the oil leakage is not bad, and completing the test.
Preferably, after the step E) is completed, the oil inlet pressure in the air compressor assembly is reduced, the air compressor assembly returns to the step D), and the step D) and the step E) are repeatedly performed until the test requirement is completed.
Preferably, the transparent tube has a U-shaped structure.
Preferably, a box oil return port and a box oil outlet are arranged on the crankcase of the air compressor from top to bottom, a port at the lower end of the transparent pipe is communicated with the box oil outlet, and a port at the upper end of the transparent pipe is communicated with the box oil return port.
Compared with the prior art, the invention has the following advantages: the engine oil liquid level in the crankcase of the air compressor is monitored in real time through the transparent pipe with the scale marks, and the endurance test result of the air compressor assembly on the whole car is simulated by combining the engine oil liquid level with the bench test, and the engine oil liquid level is used for checking the sealing performance and reliability of the oil seal of the air compressor, so that compared with the endurance of the whole car, the bench test is easier to control, simpler to operate, higher in efficiency and lower in cost
Drawings
FIG. 1 is a schematic diagram of the installation of a transparent tube in the method for testing the tightness and reliability of an oil seal of an air compressor according to the present invention;
FIG. 2 is a schematic view of the transparent tube of FIG. 1;
FIG. 3 is a side view of FIG. 2;
FIG. 4 is a schematic diagram of an air compressor crankcase in a method for testing the seal tightness and reliability of an air compressor oil seal according to the invention;
FIG. 5 is a graph of test conditions.
The reference numerals of the components in the drawings are as follows:
the air compressor comprises an air compressor crankcase 1, a transparent pipe 2, a first liquid level line 3, a second liquid level line 4, an oil seal 5, a box oil outlet 6 and a box oil return opening 7.
Detailed Description
The invention will now be described in further detail with reference to the drawings and to specific examples.
The invention relates to a method for testing the tightness and reliability of an oil seal of an air compressor, which comprises the following steps:
a) Simulating the actual assembly of the air compressor assembly on the whole vehicle through computer three-dimensional simulation software, and calculating the horizontal running engine oil level H1 of the crankcase of the air compressor during the horizontal running of the real vehicle, and the highest engine oil level H2 under various special road conditions such as ascending and descending slopes, left and right turning and the like;
b) As shown in fig. 1, a transparent pipe 2 is arranged on an air compressor crankcase 1 on a test bed, two ends of the transparent pipe 2 are communicated with an engine oil channel in the air compressor crankcase 1, and two ends of the transparent pipe 2 are arranged up and down;
c) As shown in fig. 2 and 3, a first liquid level line 3 and a second liquid level line 4 are arranged on the transparent pipe 2, wherein the first liquid level line 3 corresponds to the horizontal running engine oil level H1, and the second liquid level line 4 corresponds to the highest engine oil level H2;
d) As shown in fig. 4, adjusting a switch valve of an oil return box on a test bench to enable the liquid level in a transparent pipe 2 to reach a first liquid level line 3, entering a horizontal running working condition, wherein the liquid level of engine oil in an air compressor crankcase 1 is the liquid level H1 of the engine oil for horizontal running, then enabling an air compressor assembly to run on the test bench at a rated rotation speed, recording an initial time t0 and an end time t1 as shown in fig. 5, observing whether oil leakage exists in an oil seal 5 of the air compressor assembly in a time period from t0 to t1, wherein the working condition mainly simulates the working state of the air compressor assembly when the whole vehicle runs on urban road conditions or on a flat road, and is used for checking the tightness of the oil seal 5 of the air compressor under the working condition, stopping the test and carrying out disassembly analysis on the air compressor assembly if the oil leakage is bad, carrying out design check on the oil seal 5, and entering step E if the oil leakage is not bad;
e) The oil inlet pressure in the air compressor assembly is increased, the liquid level in the transparent pipe 2 is slowly increased until reaching the second liquid level line 4, the liquid level of engine oil in the air compressor crankcase 1 is the highest engine oil level H2, the special road condition working condition is entered, then the air compressor assembly is enabled to operate on a test bench at the rated rotation speed, the starting time t2 and the ending time t3 are recorded, whether oil leakage exists in the oil seal 5 when the air compressor assembly works in the time period from t2 to t3 is observed, the working condition is mainly used for simulating the working state of the air compressor assembly when the whole vehicle runs on special road sections such as uphill and downhill, jolt, mountain and the like, the tightness of the air compressor oil seal 5 under the working condition is checked, if the oil leakage is bad, the test is stopped, the air compressor assembly is disassembled and analyzed, the oil seal 5 is designed and checked, and if the oil leakage is not bad, the test is completed.
In this embodiment, in order to further test the tightness and reliability of the oil seal 5, after the step E) is completed, the oil inlet pressure in the air compressor assembly is reduced, and the steps D) and E) are repeatedly performed until the test requirement is completed, wherein the oil inlet pressure in the air compressor assembly is reduced until the liquid level in the transparent tube 2 returns to the first liquid level line 3, and the horizontal running condition is again entered, and at this time, the oil level in the air compressor crankcase 1 is the horizontal running oil level H1, and then the air compressor assembly is operated on the test bench at the rated rotation speed, and the initial time t4 is recorded, and the steps D) and E) are performed.
In addition, in this embodiment, the transparent tube 2 has a U-shaped structure, and the crankcase 1 of the air compressor is provided with a tank oil return port 7 and a tank oil outlet 6 from top to bottom, and a port at the lower end of the transparent tube 2 is communicated with the tank oil outlet 6, and a port at the upper end of the transparent tube 2 is communicated with the tank oil return port 7.
In this embodiment, the oil level height in the air compressor crankcase 1 is monitored by the position of the liquid level in the transparent pipe 2, and the oil level height in the air compressor crankcase 1 can be stabilized at H1 or H2 by adjusting the oil inlet pressure and the oil return speed of the test stand of the air compressor, so as to reflect the actual running condition of the air compressor assembly on the whole vehicle and reflect the tightness and reliability of the air compressor oil seal 5 under these conditions.
According to the method for testing the tightness and reliability of the air compressor oil seal, disclosed by the invention, the engine oil level in the air compressor crankcase 1 is monitored in real time through the transparent pipe 2 with the scale marks, and the endurance test result of the air compressor assembly on the whole vehicle is simulated by combining the bench test, so that the tightness and reliability of the air compressor oil seal 5 are checked.
Claims (4)
1. A method for testing the tightness and reliability of an oil seal of an air compressor is characterized by comprising the following steps: the method comprises the following steps:
a) Simulating the actual assembly of the air compressor assembly on the whole vehicle through computer three-dimensional simulation software, and calculating the horizontal running engine oil level H1 of the crankcase of the air compressor during the horizontal running of the real vehicle, and the highest engine oil level H2 under various special road conditions such as ascending and descending slopes, left and right turning and the like;
b) A transparent pipe (2) is arranged on an air compressor crankcase (1) on a test bed, two ends of the transparent pipe (2) are communicated with an engine oil channel in the air compressor crankcase (1), and two ends of the transparent pipe (2) are arranged up and down;
c) A first liquid level line (3) and a second liquid level line (4) are arranged on the transparent pipe (2), the first liquid level line (3) corresponds to the horizontal running engine oil level H1, and the second liquid level line (4) corresponds to the highest engine oil level H2;
d) Adjusting a switch valve of an oil return box on a test bench to enable the liquid level in a transparent pipe (2) to reach a first liquid level line (3) and enter a horizontal running working condition, wherein the oil level in an air compressor crankcase (1) is the horizontal running oil level H1, then enabling an air compressor assembly to run on the test bench at a rated rotation speed, recording an initial time t0 and an end time t1, observing whether oil leakage exists in an oil seal (5) of the air compressor assembly within a period from t0 to t1, stopping a test and carrying out disassembly analysis on the air compressor assembly if the oil leakage is bad, carrying out design check on the oil seal (5), and entering a step E if the oil leakage is not bad;
e) Increasing the oil inlet pressure in the air compressor assembly, enabling the liquid level in the transparent pipe (2) to slowly rise until reaching the second liquid level line (4), enabling the oil level in the air compressor crankcase (1) to be the highest oil level H2 at the moment, entering special road condition working conditions, enabling the air compressor assembly to run on a test bench at rated rotation speed, recording the starting time t2 and the ending time t3, observing whether oil leakage exists in an oil seal (5) when the air compressor assembly works in a time period from t2 to t3, stopping a test and carrying out disassembly analysis on the air compressor assembly if poor oil leakage exists, and carrying out design checking on the oil seal (5) if poor oil leakage does not exist, and completing the test.
2. The air compressor oil seal tightness and reliability test method according to claim 1, wherein: and after the step E) is finished, reducing the oil inlet pressure in the air compressor assembly, returning to the step D), and repeatedly executing the step D) and the step E) until the test requirement is finished.
3. The air compressor oil seal tightness and reliability test method according to claim 1, wherein: the transparent tube (2) is of a U-shaped structure.
4. The air compressor oil seal tightness and reliability test method according to claim 1, wherein: the air compressor crankcase (1) is provided with a box oil return port (7) and a box oil outlet (6) from top to bottom, a port at the lower end of the transparent pipe (2) is communicated with the box oil outlet (6), and a port at the upper end of the transparent pipe (2) is communicated with the box oil return port (7).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110966532.0A CN113701949B (en) | 2021-08-23 | 2021-08-23 | Air compressor oil seal tightness and reliability testing method |
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| CN202110966532.0A CN113701949B (en) | 2021-08-23 | 2021-08-23 | Air compressor oil seal tightness and reliability testing method |
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| CN113701949A CN113701949A (en) | 2021-11-26 |
| CN113701949B true CN113701949B (en) | 2023-04-25 |
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| CN114923682B (en) * | 2022-05-17 | 2023-10-24 | 北京通嘉宏瑞科技有限公司 | Shaft seal service life acceleration verification testing machine and testing method |
| CN116519220B (en) * | 2023-06-29 | 2023-11-07 | 太仓奥林吉汽车零部件有限公司 | Engine part tightness detector |
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| DE4238577A1 (en) * | 1992-11-16 | 1994-05-19 | Kloeckner Humboldt Deutz Ag | Leak testing method, esp. for hydraulic systems - involves filling test vol. and test device partial vol. with test liquid, changing test vol. and measuring resulting press. step |
| JP2000228464A (en) * | 1999-02-05 | 2000-08-15 | Hitachi Ltd | Method for evaluating strength of sealing connection part |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP4163727B2 (en) * | 2006-08-31 | 2008-10-08 | 本田技研工業株式会社 | Oil level detection device for internal combustion engine |
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- 2021-08-23 CN CN202110966532.0A patent/CN113701949B/en active Active
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| DE4238577A1 (en) * | 1992-11-16 | 1994-05-19 | Kloeckner Humboldt Deutz Ag | Leak testing method, esp. for hydraulic systems - involves filling test vol. and test device partial vol. with test liquid, changing test vol. and measuring resulting press. step |
| JP2000228464A (en) * | 1999-02-05 | 2000-08-15 | Hitachi Ltd | Method for evaluating strength of sealing connection part |
| CN101210853A (en) * | 2006-12-27 | 2008-07-02 | 比亚迪股份有限公司 | Electric engine oil seal detection device |
| CN107421691A (en) * | 2017-08-28 | 2017-12-01 | 西北工业大学 | A kind of fuel tank low temperature airtightness reliability test system and method |
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Non-Patent Citations (1)
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