CN113701949A - 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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- CN113701949A CN113701949A CN202110966532.0A CN202110966532A CN113701949A CN 113701949 A CN113701949 A CN 113701949A CN 202110966532 A CN202110966532 A CN 202110966532A CN 113701949 A CN113701949 A CN 113701949A
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- air compressor
- oil
- liquid level
- test
- oil seal
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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
Abstract
The invention relates to the technical field of automobile parts and discloses a method for testing the sealing performance and reliability of an oil seal of an air compressor, which comprises the following steps: calculating the level of the horizontal running engine oil and the maximum engine oil level of the crankcase of the air compressor, arranging a transparent pipe, arranging two liquid level lines corresponding to the level of the horizontal running engine oil and the maximum engine oil level on the transparent pipe, and adjusting a switch valve of an oil return box on a test bench to enable the engine oil to be respectively positioned at the height of the two liquid level lines to carry out oil leakage test. The method for testing the air compressor oil seal tightness and reliability can accurately feed back the actual assembly and operation conditions of the air compressor assembly on the whole vehicle, thereby truly feeding back the air compressor assembly oil seal tightness and reliability.
Description
Technical Field
The invention relates to the technical field of automobile parts, in particular to a method for testing the sealing performance and reliability of an oil seal of an air compressor.
Background
At present, the air compressor assembly tightness test is carried out to check the air compressor assembly tightness, 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 goes up and down a slope and turns left and right, so that the risk of oil leakage of the air compressor assembly on the whole vehicle is possible.
Disclosure of Invention
The invention aims to provide a method for testing the sealing performance and the reliability of the oil seal of the air compressor, which can accurately feed back the actual assembly and operation conditions of an air compressor assembly on a whole vehicle so as to truly feed back the sealing performance and the reliability of the oil seal of the air compressor assembly.
In order to achieve the purpose, the method for testing the air compressor oil seal tightness and reliability comprises the following steps:
A) simulating actual assembly of the air compressor assembly on the whole vehicle through computer three-dimensional simulation software, and calculating a horizontal driving engine oil liquid level H1 of an air compressor crankcase when the actual vehicle is driven horizontally, and a highest engine oil liquid level H2 under various special road conditions such as up and down slopes, left and right turns and the like;
B) a transparent pipe is arranged on an air compressor crankcase on a test bed, two ends of the transparent pipe are both 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 a horizontal driving engine oil level H1, and the second liquid level line corresponds to a highest engine oil level H2;
D) adjusting a switch valve of an oil return tank on a test bench to enable the liquid level in the transparent pipe to reach the first liquid level line, entering a horizontal driving working condition, wherein the oil level height in a crankcase of the air compressor is the horizontal driving oil level H1, then enabling the air compressor assembly to run on the test bench at a rated rotating speed, recording initial time t0 and ending time t1, observing whether oil leakage occurs in an oil seal of the air compressor assembly within a time period from t0 to t1, if oil leakage is poor, stopping the test, performing disassembly analysis on the air compressor assembly, performing design check on the oil seal, and if oil leakage is not poor, entering step E);
E) increasing the oil inlet pressure in the air compressor assembly, enabling the liquid level in the transparent pipe to slowly rise until the liquid level reaches the second liquid level line, enabling the oil liquid level height in the crankcase of the air compressor to be the highest oil liquid level H2 at the moment, entering the working condition of special road conditions, then enabling the air compressor assembly to run at a rated rotating speed on a test bench, 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 within the time period from t2 to t3, stopping the test and carrying out disassembly analysis on the air compressor assembly if oil leakage is poor, carrying out design and check on the oil seal, and completing the test if oil leakage is not poor.
Preferably, after the step E) is completed, reducing the oil inlet pressure in the air compressor assembly, returning to the step D), and repeatedly executing the steps D) and E) until the test requirement is completed.
Preferably, the transparent tube has a U-shaped structure.
Preferably, a box body oil return opening and a box body oil outlet are formed in the air compressor crankcase from top to bottom, a port at the lower end of the transparent pipe is communicated with the box body oil outlet, and a port at the upper end of the transparent pipe is communicated with the box body oil return opening.
Compared with the prior art, the invention has the following advantages: the oil level of the engine oil in the crankcase of the air compressor is monitored in real time through the transparent tube with the scale lines, the durability test result of the air compressor assembly on the whole vehicle is simulated by combining the transparent tube with the scale lines with the bench test, the oil seal sealing performance and reliability of the air compressor are checked, and compared with the durability of the whole vehicle, the bench test is easier to control, simpler to operate, higher in efficiency, lower in cost and capable of checking the sealing performance and reliability of the oil seal of the air compressor
Drawings
FIG. 1 is a schematic view of the installation of a transparent tube in the method for testing the sealing performance and reliability of an oil seal of an air compressor according to the present invention;
FIG. 2 is a schematic structural view of the transparent tube in FIG. 1;
FIG. 3 is a side view of FIG. 2;
FIG. 4 is a schematic diagram of an air compressor crankcase in the air compressor oil seal tightness and reliability testing method of the present invention;
fig. 5 is a test condition diagram.
The components in the figures are numbered 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 is described in further detail below with reference to the figures and the specific embodiments.
The invention discloses a method for testing the sealing performance and reliability of an oil seal of an air compressor, which comprises the following steps:
A) simulating actual assembly of the air compressor assembly on the whole vehicle through computer three-dimensional simulation software, and calculating a horizontal driving engine oil liquid level H1 of an air compressor crankcase when the actual vehicle is driven horizontally, and a highest engine oil liquid level H2 under various special road conditions such as up and down slopes, left and right turns and the like;
B) as shown in fig. 1, a transparent tube 2 is arranged on an air compressor crankcase 1 on a test bed, two ends of the transparent tube 2 are both communicated with an engine oil channel in the air compressor crankcase 1, and two ends of the transparent tube 2 are arranged up and down;
C) referring to fig. 2 and 3, a first liquid level line 3 and a second liquid level line 4 are provided on the transparent tube 2, the first liquid level line 3 corresponds to a horizontal traveling oil level H1, and the second liquid level line 4 corresponds to a maximum oil level H2;
D) as shown in fig. 4, adjusting a switch valve of an oil return tank on a test bench to enable the liquid level in a transparent tube 2 to reach a first liquid level line 3, entering a horizontal driving working condition, wherein the liquid level of the engine oil in a crankcase 1 of the air compressor is the horizontal driving engine oil level H1, then enabling the air compressor assembly to operate at a rated rotation speed on the test bench, as shown in fig. 5, recording an initial time t0 and an end time t1, and observing whether the oil seal 5 of the air compressor assembly leaks oil 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 drives on urban road conditions or on flat roads to check the sealing performance of the oil seal 5 of the air compressor under the working condition, if the oil leakage is poor, stopping the test and performing disassembly analysis on the air compressor assembly, performing design check on the oil seal 5, and if the oil leakage is not poor, entering step E);
E) increasing the oil inlet pressure in the air compressor assembly, slowly raising the liquid level in the transparent pipe 2 until reaching a second liquid level line 4, wherein the oil liquid level height in the air compressor crankcase 1 is the highest oil liquid level H2, entering a special road condition working condition, then operating the air compressor assembly on a test bench at a rated rotating speed, recording the starting time t2 and the ending time t3, observing whether oil leakage occurs in the oil seal 5 when the air compressor assembly works in a time period from t2 to t3, wherein the working condition mainly simulates the working state of the air compressor assembly when the whole vehicle runs on special road sections such as up and down slopes, bumps and winding roads and the like, so as to check the sealing performance of the oil seal 5 of the air compressor under the working condition, if oil leakage occurs badly, stopping the test and performing disassembly analysis on the air compressor assembly, designing and checking the oil seal 5, and if oil leakage badly occurs, and (6) completing the test.
In this embodiment, in order to further test the sealing performance 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 executed 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 pipe 2 returns to the first liquid level line 3, and then the air compressor assembly enters the horizontal driving condition again, at this time, the oil level height in the air compressor crankcase 1 is the horizontal driving oil level H1, then the air compressor assembly is operated on the test bed at the rated rotation speed, the initial time t4 is recorded, and the following steps D) and E) are performed.
In addition, in this embodiment, the transparent tube 2 is a U-shaped structure, the air compressor crankcase 1 is provided with a tank oil return opening 7 and a tank oil outlet 6 from top to bottom, 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 opening 7.
In the embodiment, the oil level height in the air compressor crankcase 1 is monitored through 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 a test bed of the air compressor, so that the actual operation working conditions of the air compressor assembly on the whole vehicle are reflected, and the sealing performance and the reliability of the oil seal 5 of the air compressor under the working conditions are reflected.
The air compressor oil seal tightness and reliability testing method monitors the engine oil liquid level in the air compressor crankcase 1 in real time through the transparent tube 2 with the scale lines, combines a bench test to simulate the endurance test result of the air compressor assembly on the whole vehicle, and is used for checking the tightness and reliability of the air compressor oil seal 5.
Claims (4)
1. The air compressor oil seal tightness and reliability testing method is characterized by comprising the following steps of: the method comprises the following steps:
A) simulating actual assembly of the air compressor assembly on the whole vehicle through computer three-dimensional simulation software, and calculating a horizontal driving engine oil liquid level H1 of an air compressor crankcase when the actual vehicle is driven horizontally, and a highest engine oil liquid level H2 under various special road conditions such as up and down slopes, left and right turns 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 a horizontal running engine oil level H1, and the second liquid level line (4) corresponds to a highest engine oil level H2;
D) adjusting a switch valve of an oil return tank on a test bench to enable the liquid level in the transparent pipe (2) to reach the first liquid level line (3), and entering a horizontal running working condition, wherein the liquid level of the engine oil in the crankcase (1) of the air compressor is the horizontal running engine oil level H1, then enabling the air compressor assembly to run at a rated speed on the test bench, 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 time period from t0 to t1, stopping the test and performing disassembly analysis on the air compressor assembly if the oil leakage is poor, designing and checking the oil seal (5), and entering a step E if the oil leakage is not poor;
E) increasing the oil inlet pressure in the air compressor assembly, enabling the liquid level in the transparent pipe (2) to slowly rise until the liquid level reaches the second liquid level line (4), enabling the oil liquid level in the air compressor crankcase (1) to be the highest oil liquid level H2 at the moment, entering a working condition of special road conditions, then enabling the air compressor assembly to run at a rated speed on a test bench, recording the starting time t2, the ending time t3, observing whether oil leakage exists in an oil seal (5) when the air compressor assembly works in the time period from t2 to t3, stopping the test and carrying out disassembly analysis on the air compressor assembly if the oil leakage is bad, carrying out design and check on the oil seal (5), and completing the test if the oil leakage is not bad.
2. The air compressor oil seal tightness and reliability test method according to claim 1, characterized in that: and E), 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, characterized in that: 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, characterized in that: the air compressor is characterized in that the air compressor crankcase (1) is provided with a box oil return opening (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 opening (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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| 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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| CN113701949A true CN113701949A (en) | 2021-11-26 |
| CN113701949B CN113701949B (en) | 2023-04-25 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114923682A (en) * | 2022-05-17 | 2022-08-19 | 北京通嘉宏瑞科技有限公司 | Testing machine and testing method for accelerated verification of shaft seal service life |
| CN116519220A (en) * | 2023-06-29 | 2023-08-01 | 太仓奥林吉汽车零部件有限公司 | Engine part tightness detector |
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2021
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114923682A (en) * | 2022-05-17 | 2022-08-19 | 北京通嘉宏瑞科技有限公司 | Testing machine and testing method for accelerated verification of shaft seal service life |
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| 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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| CN113701949B (en) | 2023-04-25 |
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