CN107560803B - Micro negative pressure sealing inspection device for intermediate water jacket of supercharger - Google Patents
Micro negative pressure sealing inspection device for intermediate water jacket of supercharger Download PDFInfo
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- CN107560803B CN107560803B CN201710940482.2A CN201710940482A CN107560803B CN 107560803 B CN107560803 B CN 107560803B CN 201710940482 A CN201710940482 A CN 201710940482A CN 107560803 B CN107560803 B CN 107560803B
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- water jacket
- negative pressure
- detection
- air passage
- shaped pressure
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 58
- 238000007789 sealing Methods 0.000 title claims abstract description 39
- 238000007689 inspection Methods 0.000 title claims description 11
- 238000001514 detection method Methods 0.000 claims abstract description 46
- 230000001105 regulatory effect Effects 0.000 claims abstract description 21
- 230000006835 compression Effects 0.000 claims abstract description 14
- 238000007906 compression Methods 0.000 claims abstract description 14
- 210000000476 body water Anatomy 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- 230000033228 biological regulation Effects 0.000 claims description 3
- 238000005259 measurement Methods 0.000 claims description 2
- 239000000543 intermediate Substances 0.000 abstract 4
- 239000003350 kerosene Substances 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
Classifications
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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
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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- Examining Or Testing Airtightness (AREA)
Abstract
The invention relates to the technical field of supercharger detection, in particular to a micro negative pressure sealing and detecting device for a water jacket of a supercharger intermediate, which comprises a compression cylinder, a reversing valve, a negative pressure generator and two U-shaped pressure gauges, wherein a compressed air source is connected with the reversing valve through a first air path, the compression cylinder is controlled to stretch out and draw back through the reversing valve, one end of a water jacket cavity of the intermediate to be detected extends out and is blocked through the compression cylinder, and the other end of the water jacket cavity of the intermediate to be detected is connected with the first U-shaped pressure gauges in a sealing way through a first detection air path; the compressed air source is connected with the negative pressure generator in a sealing way through a second air passage, a plurality of pressure regulating valves are arranged on the second air passage, the negative pressure generator is connected with the second U-shaped pressure gauge in a sealing way through a second detection air passage, the second detection air passage is connected with the first detection air passage through a third air passage, and a stop valve and an orifice piece are arranged on the third air passage. The invention can rapidly and accurately identify the leaked intermediates with different degrees, and the detection efficiency is greatly improved.
Description
Technical Field
The invention relates to the technical field of supercharger detection, in particular to a micro negative pressure sealing inspection device for a supercharger intermediate water jacket.
Background
The components in the supercharger are tightly combined, and various detection is important to the quality of products, wherein the detection of the sealing performance of the intermediate water jacket is particularly important. In the prior art, the sealing inspection of the intermediate water jacket is to introduce compressed air into the water jacket cavity, simultaneously, plug other openings of the intermediate water jacket with a plug, then put the intermediate water jacket into kerosene to observe whether bubbles emerge, and the qualified intermediate water jacket is obtained when no bubbles emerge. The main disadvantages of this inspection method are: 1. the working environment is not good, kerosene is easy to pollute the environment, and certain influence can be caused on human bodies; 2. the sealing test efficiency is low; 3. sometimes, due to the existence of oxide scale in cast iron, the oxide scale is pressed on a leakage part under the action of air pressure, and an error test result is easy to occur.
Disclosure of Invention
The invention aims to provide a micro negative pressure sealing inspection device for a water jacket of a supercharger intermediate, which can rapidly and accurately identify the leaked intermediate with different degrees and greatly improve the detection efficiency.
The aim of the invention is realized by the following technical scheme:
The micro negative pressure sealing inspection device for the water jacket of the supercharger intermediate comprises a compression cylinder, a reversing valve, a negative pressure generator and two U-shaped pressure gauges, wherein a compressed air source is connected with the reversing valve through a first air path, the compression cylinder is controlled to stretch out and draw back through the reversing valve, one end of a water jacket cavity of the intermediate to be inspected extends out of the compression cylinder to be plugged, and the other end of the water jacket cavity of the intermediate to be inspected is connected with the first U-shaped pressure gauges in a sealing manner through a first detection air path; the compressed air source is connected with the negative pressure generator in a sealing way through a second air passage, a plurality of pressure regulating valves are arranged on the second air passage, the negative pressure generator is connected with a second U-shaped pressure gauge in a sealing way through a second detection air passage, the second detection air passage is connected with the first detection air passage through a third air passage, and a stop valve and an orifice piece are arranged on the third air passage.
The second gas path is provided with a first pressure regulating valve for pressure stabilization and a second pressure regulating valve for pressure regulation in sequence along the gas inflow direction.
The upper side of the intermediate to be detected is provided with an upper sealing gasket, the lower side of the intermediate to be detected is provided with a lower supporting plate, and a lower sealing gasket is arranged between the intermediate to be detected and the lower supporting plate.
And a positioning pin sleeve for fixing the end part of the first detection gas circuit is arranged in the lower supporting plate.
And when the intermediate to be detected is closed and no leakage exists, the water column drop of the first U-shaped pressure gauge is increased to be equivalent to that of the second U-shaped pressure gauge.
When the water column drop of the first U-shaped pressure gauge is equal to that of the second U-shaped pressure gauge, the stop valve is closed, and when the water jacket of the intermediate to be detected has slight leakage, the high-level water column of the first U-shaped pressure gauge descends.
The invention has the advantages and positive effects that:
1. According to the invention, the leaked booster intermediate can be rapidly identified through the comparison of the rising heights of the water columns of the two U-shaped pressure gauges, and the slightly leaked intermediate can be further identified through pressure maintaining detection, so that the detection purpose of accurately identifying the leaked intermediate with different degrees is realized.
2. The invention uses the compression cylinder to rapidly plug and clamp the fixed intermediate, and has simple and rapid operation.
3. The invention does not use polluted medium, and has good working environment.
4. The invention detects intermediate sealing by utilizing micro negative pressure, and the problem that the scale influences the leakage detection result is avoided.
Drawings
Figure 1 is a schematic view of the present invention,
Fig. 2 is an enlarged view of the intermediate to be inspected in fig. 1.
The device comprises a first U-shaped pressure gauge 1, a second U-shaped pressure gauge 2, a stop valve 3, an orifice piece 4, a second pressure regulating valve 5, a first pressure regulating valve 6, a compression cylinder 7, a compression rod 8, an upper sealing gasket 9, a to-be-detected intermediate 10, a lower sealing gasket 11, a positioning pin sleeve 12, a lower supporting plate 13, a reversing valve 14, a compressed air source 15, a negative pressure generator 16, a first air channel 17, a second air channel 18, a first detection air channel 19, a second detection air channel 20 and a third air channel 21.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings.
As shown in fig. 1-2, the invention comprises a compacting cylinder 7, a reversing valve 14, a negative pressure generator 16 and two U-shaped pressure gauges, wherein a compressed air source 15 is connected with the reversing valve 14 through a first air channel 17, the reversing valve 14 is connected with the compacting cylinder 7, the compacting cylinder 7 controls expansion and contraction through the reversing valve 14, one end of a water jacket cavity in an intermediate body 10 to be detected is plugged through the compacting cylinder 7 during detection, the compacting cylinder 7 simultaneously realizes sealing and clamping of the intermediate body 10 to be detected, the other end of the water jacket cavity of the intermediate body 10 to be detected is connected with the first U-shaped pressure gauge 1 in a sealing manner through a first detection air channel 19, the compressed air source 15 is connected with the negative pressure generator 16 in a sealing manner through a second air channel 18, a first pressure regulating valve 6 and a second pressure regulating valve 5 are sequentially arranged on the second air channel 18 along the air inflow direction, the negative pressure generator 16 is connected with the second U-shaped pressure gauge 2 in a sealing manner through a second detection air channel 20, the second detection air channel 20 is connected with the first detection air channel 19 through a third detection air channel 21, and a stop valve 3 and a stop valve 4 are arranged on the third air channel 21. In this embodiment, the reversing valve 14 is a two-position four-way reversing valve, and the negative pressure generator 16, the U-shaped pressure gauge, the orifice member 4, and other valve bodies are all well known in the art.
As shown in fig. 1-2, an upper sealing gasket 9 is arranged on the upper side of the intermediate body 10 to be inspected, a lower sealing gasket 11 and a lower supporting plate 13 are arranged on the lower side of the intermediate body 10 to be inspected, the lower sealing gasket 11 is arranged between the intermediate body 10 to be inspected and the lower supporting plate 13, when the compression rod 8 of the compression cylinder 7 stretches out, the intermediate body 10 to be inspected is propped against, and the upper sealing gasket 9 and the lower sealing gasket 11 jointly act with the lower supporting plate 13 to achieve the purpose of clamping the intermediate body 10 to be inspected, and at the moment, the upper sealing gasket 9 and the lower sealing gasket 11 ensure the sealing of a water jacket cavity in the intermediate body 10 to be inspected.
As shown in fig. 2, a positioning pin sleeve 12 is provided in the lower support plate 13 for fixing an end portion of the first detection gas path 19, and the positioning pin sleeve 12 simultaneously penetrates the lower seal 11.
The working principle of the invention is as follows:
During detection, the pressing cylinder 7 can be controlled to clamp and block or loosen the intermediate 10 to be detected by manually pressing the reversing valve 14, and after the compressed air input by the compressed air source 15 (P0) is stabilized by the first pressure regulating valve 6, the negative pressure generator 16 generates negative pressure with continuously adjustable pressure of 0 to 8KPa by manually regulating the second pressure regulating valve 5.
The stop valve 3 on the third air path 21 is in an open state before measurement, so that the first detection air path 19 and the second detection air path 20 are in a communicated state. The second pressure regulating valve 5 is firstly regulated to enable the water column drop in the second U-shaped pressure gauge 2 to reach P1 pressure (600-800 mm water column), at the moment, the intermediate body 10 to be detected is not blocked and clamped, and is influenced by the orifice piece 4, air cannot quickly flow into the first detection air passage 19 in a large quantity, the air pressure in the intermediate body water jacket and the first detection air passage 19 is not greatly different from the outside, and at the moment, the water column drop of the first U-shaped pressure gauge 1 is small.
During detection, the intermediate body 10 to be detected is clamped and sealed, if the water jacket cavity of the intermediate body 10 to be detected is not leaked, the negative pressure P2 value in the intermediate body water jacket and the first detection air path 19 can quickly rise to P1, namely the first U-shaped pressure gauge 1 water column drop can rise to be equivalent to the second U-shaped pressure gauge 2 water column drop, and if the intermediate body is leaked, the negative pressure P2 is necessarily smaller than P1, namely the first U-shaped pressure gauge 1 water column drop is smaller than the second U-shaped pressure gauge 2 water column drop.
If the first U-shaped pressure gauge 1 water column drop is equal to the second U-shaped pressure gauge 2 water column drop, the stop valve 3 is closed, and whether the intermediate water jacket has slight leakage can be further detected. After closing the shut-off valve 3, if there is a slight leakage of the intermediate water jacket, the first U-shaped manometer 1 high-water column will slowly drop, and if it is observed that the first U-shaped manometer 1 high-water column does not drop for a certain period of time (30 seconds in this embodiment), it means that the intermediate water jacket has no leakage.
Claims (3)
1. A micro negative pressure sealing inspection method for a water jacket of a supercharger intermediate is characterized by comprising the following steps of: the micro negative pressure sealing inspection device for the water jacket of the supercharger intermediate is used and comprises a compression cylinder (7), a reversing valve (14), a negative pressure generator (16) and two U-shaped pressure gauges, a compressed air source (15) is connected with the reversing valve (14) through a first air passage (17), the compression cylinder (7) is controlled to stretch and retract through the reversing valve (14), one end of a water jacket cavity of the intermediate to be inspected (10) is plugged by extending out of the compression cylinder (7), and the other end of the water jacket cavity of the intermediate to be inspected (10) is connected with the first U-shaped pressure gauges (1) in a sealing mode through a first detection air passage (19); the compressed air source (15) is connected with the negative pressure generator (16) in a sealing way through a second air passage (18), a plurality of pressure regulating valves are arranged on the second air passage (18), the negative pressure generator (16) is connected with the second U-shaped pressure gauge (2) in a sealing way through a second detection air passage (20), the second detection air passage (20) is connected with the first detection air passage (19) through a third air passage (21), and a stop valve (3) and an orifice piece (4) are arranged on the third air passage (21);
A first pressure regulating valve (6) for pressure regulation and a second pressure regulating valve (5) for pressure regulation are sequentially arranged on the second gas path (18) along the gas inflow direction;
During detection, the pressing cylinder (7) is controlled to clamp and block or loosen the intermediate (10) to be detected by manually pressing the reversing valve (14), and after the compressed air input by the compressed air source (15) is stabilized by the first pressure regulating valve (6), the negative pressure generator (16) generates 0-8 KPa continuously adjustable negative pressure by manually regulating the second pressure regulating valve (5);
The stop valve (3) on the third air channel (21) is in an open state before measurement to enable the first detection air channel (19) to be communicated with the second detection air channel (20), the second pressure regulating valve (5) is firstly regulated to enable the water column drop in the second U-shaped pressure gauge (2) to reach P1 pressure, at the moment, because an intermediate body (10) to be detected is not blocked and clamped and is influenced by the orifice piece (4), air cannot quickly flow into the first detection air channel (19), the air pressure in the intermediate body water jacket and the first detection air channel (19) is not greatly different from the outside, and the water column drop of the first U-shaped pressure gauge (1) is small;
When the intermediate body (10) to be detected is clamped and sealed during detection, if the water jacket cavity of the intermediate body (10) to be detected is not leaked, the negative pressure P2 value in the intermediate body water jacket and the first detection air path (19) can quickly rise to P1, namely the water column drop of the first U-shaped pressure gauge (1) can rise to be equivalent to the water column drop of the second U-shaped pressure gauge (2), and if the intermediate body is leaked, the negative pressure P2 is necessarily smaller than P1, namely the water column drop of the first U-shaped pressure gauge (1) is smaller than the water column drop of the second U-shaped pressure gauge (2);
If the water column drop of the first U-shaped pressure gauge (1) is equal to that of the second U-shaped pressure gauge (2), the stop valve (3) is closed to further detect whether the intermediate water jacket is slightly leaked, after the stop valve (3) is closed, if the intermediate water jacket is slightly leaked, the high-level water column of the first U-shaped pressure gauge (1) can slowly descend, and if the high-level water column of the first U-shaped pressure gauge (1) is observed not to descend in a period of time, the intermediate water jacket is indicated to be free from leakage.
2. The supercharger intermediate water jacket micro-negative pressure seal inspection method according to claim 1, characterized by comprising the following steps: the upper side of the intermediate body (10) to be detected is provided with an upper sealing gasket (9), the lower side of the intermediate body (10) to be detected is provided with a lower supporting plate (13), and a lower sealing gasket (11) is arranged between the intermediate body (10) to be detected and the lower supporting plate (13).
3. The supercharger intermediate water jacket micro-negative pressure seal inspection method according to claim 2, characterized by comprising the following steps: a positioning pin sleeve (12) for fixing the end part of the first detection gas circuit (19) is arranged in the lower supporting plate (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710940482.2A CN107560803B (en) | 2017-10-11 | 2017-10-11 | Micro negative pressure sealing inspection device for intermediate water jacket of supercharger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710940482.2A CN107560803B (en) | 2017-10-11 | 2017-10-11 | Micro negative pressure sealing inspection device for intermediate water jacket of supercharger |
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| Publication Number | Publication Date |
|---|---|
| CN107560803A CN107560803A (en) | 2018-01-09 |
| CN107560803B true CN107560803B (en) | 2024-04-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710940482.2A Active CN107560803B (en) | 2017-10-11 | 2017-10-11 | Micro negative pressure sealing inspection device for intermediate water jacket of supercharger |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111157182B (en) * | 2020-01-15 | 2021-02-19 | 东风汽车集团有限公司 | Engine oil sealing test method of supercharger |
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