CN104931214A - A machine oil cooler leakage detection method - Google Patents
A machine oil cooler leakage detection method Download PDFInfo
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- CN104931214A CN104931214A CN201510389420.8A CN201510389420A CN104931214A CN 104931214 A CN104931214 A CN 104931214A CN 201510389420 A CN201510389420 A CN 201510389420A CN 104931214 A CN104931214 A CN 104931214A
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- oil cooler
- leakage
- slip
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- detecting
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Abstract
The invention relates to a machine oil cooler leakage detection method characterized in that the method comprises steps of interface plugging and detection equipment connecting; leakage detecting and result determining; and result determining and processing. The leakage detecting and result determining step comprises two sub-steps of leakage rate detecting and leakage point detecting. According to the invention, a measuring principle of a pressure reducing method is employed; pressure drop in a workpiece is measured through a sensor and is converted into a leakage rate; local leakage detecting is carried out through a soap bubble method; the method is applicable to leakage detecting of machine oil coolers; part soaking is not needed in a leakage testing process; a normal working state of a machine oil cooler on an engine can be simulated; the operation is simple and convenient; the leakage detecting positioning is accurate; the measuring process is short in beat; measuring data can be bound with the engine and is traceable; and the machine oil cooler leakage detection method is applicable to automatic jug line production.
Description
Technical field
The present invention relates to the leakage detection method of auto parts and components, specifically a kind of heavy machine oil cooler leakage detection method, belongs to technical field of diesel engine production.
Background technology
In automobile industry, the Leak Detection of cooler for engine oil normally adopts the wet type leak test technology of bowssening, oil cooler immerses and is equipped with in the container of water by it, and in oil cooler, be filled with pressurized air, by observing the leakage situation whether having method that bubble overflows to carry out detection part.There is following shortcoming in such detection method: 1, oil cooler is immersed in the water and carries out leak test detection, cannot analog machine oil cooler normal operating conditions on the engine, and easily cause the quality problems such as oil cooler corrosion; The leak test pattern operation of bowssening is comparatively loaded down with trivial details, and beat is longer, and the large line that cannot adapt to robotization is produced.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of oil cooler leakage detection method is provided, it is for carrying out Leak Detection to oil cooler, without the need to soaking parts and can analog machine oil cooler normal operating conditions on the engine in leak test process, simple to operation, leakage detection accurate positioning, measuring process beat is short, measurement data can be bound and can review with engine, and the large line that can adapt to robotization is produced.
According to technical scheme provided by the invention: oil cooler leakage detection method, it is characterized in that comprising the following steps:
1), interface shutoff connect checkout equipment:
Oil cooler is fixed on pallet by operation bolt, and the sealed bolster plate on pallet carries out shutoff to by-pass valve in oil cooler and pressure regulator valve side pipe mouth, and the full flow type machine filter mouth of oil cooler adopts shutoff frock to carry out manual shutoff; Utilize the mouth of pipe of pressure regulator valve side to inflate workpiece, the mouth of pipe is connected with leak test instrument, and sensor in leakage instrument detects the flowing reaching gas after equilibrium stage, and is converted to slip;
2), Leak Detection and result judge:
2.1), slip detects: to oil cooler inner inflatable, charge pressure is 4bar, and inflationtime is 55 seconds; Then wait for pressure equilibrium, equilibration time is 10s, and the measurement pressure in the oil cooler after pressure equilibrium should be 3.8 ~ 4.1bar; Then carry out slip detection by leakage detector to oil cooler, detection time is 10 seconds;
2.2), leakage point detects: to the pressure regulator valve in oil cooler, by-pass valve, three hexagonal socket head plugs, technique silently and seal pad place detect, judge whether to there is leakage point;
2.3) result judges and process: if the oil cooler slip 1. in step 2.1 is not more than 10cm
3/ min, but step 2.2 finds leakage point, then measure after needing to reprocess oil cooler again, qualified, lets pass or 2. process according to flow process; If the oil cooler slip 2. in step 2.1 is more than 10cm
3/ min, but step 2.2 does not find leakage point, then need again to measure oil cooler, and qualified, let pass, again measure overproof, carry out water examination, water examination is qualified, directly rolls off the production line, and water examination finds that leak source is then reprocessed, until roll off the production line after qualified; If the oil cooler slip 3. in step 2.1 is more than 10cm
3/ min, and step 2.2 finds leakage point, then measure after needing to reprocess oil cooler again, qualified, lets pass or 2. process according to flow process.
As a further improvement on the present invention, the gas being filled with oil cooler in described step 2.1 adopts dry pressurized air.
As a further improvement on the present invention, described step 2.3 adopts soap bubble method may carry out detection judgement by leakage position to each in oil cooler, and detecting the leakage agent adopted is OKS2811 Leak Detection liquid.
compared with prior art, tool has the following advantages in the present invention:the present invention adopts the measuring principle of pressure reduction, by the pressure drop in sensor measurement workpiece, convert slip to, and carry out local leakage detection by soap bubble method, be applicable to carry out Leak Detection to oil cooler, without the need to soaking parts and can analog machine oil cooler normal operating conditions on the engine in leak test process, simple to operation, leakage detection accurate positioning, measuring process beat is short, measurement data can be bound and can review with engine, and the large line that can adapt to robotization is produced.
Embodiment
Below in conjunction with specific embodiment, the invention will be further described.
Instrument and equipment:
Adopt the MPS200 type leakage instrument that German FROEHLICH company produces.
Embodiment 1
Leak Detection is carried out to the oil cooler that model is 1013000-81D, comprises the following steps:
1), interface shutoff connect checkout equipment:
Oil cooler is fixed on pallet by operation bolt, carries out shutoff to the full flow type machine filter mouth of oil cooler; The heat eliminating medium outlet of oil cooler connects, and cooling medium inlet connects charger;
2), Leak Detection and result judge:
2.1), slip detects: to oil cooler inner inflatable, charge pressure is 4bar, and inflationtime is 55 seconds; Then wait for pressure equilibrium, equilibration time is 10s, and the measurement pressure in the oil cooler after pressure equilibrium is 3.9bar; Then carry out slip detection by leakage detector to oil cooler, detection time is 10 seconds, detects and show that slip is 0.76cm
3/ min;
2.2), leakage point detects: adopt soap bubble method to the pressure regulator valve in oil cooler, by-pass valve, three hexagonal socket head plugs, technique silently and seal pad place detect, detecting the leakage agent adopted is OKS2811 Leak Detection liquid, does not find leak source after testing;
2.3) result judges and process: after testing, the oil cooler slip in step 2.1 is not more than 10cm
3/ min, and step 2.2 does not find leak source, deteminate machine oil cooler is qualified, beats to carve bar code and roll off the production line.
The gas being filled with oil cooler in the present embodiment 1 step 2.1 adopts dry pressurized air.
Embodiment 2
Leak Detection is carried out to the oil cooler that model is 1013000-81D, comprises the following steps:
1), interface shutoff connect checkout equipment:
Oil cooler is fixed on pallet by operation bolt, carries out shutoff to the full flow type machine filter mouth of oil cooler; The heat eliminating medium outlet of oil cooler connects, and cooling medium inlet connects charger;
2), Leak Detection and result judge:
2.1), slip detects: to oil cooler inner inflatable, charge pressure is 4bar, and inflationtime is 55 seconds; Then wait for pressure equilibrium, equilibration time is 10s, and the measurement pressure in the oil cooler after pressure equilibrium is 3.9bar; Then carry out slip detection by leakage detector to oil cooler, detection time is 10 seconds, detects and show that slip is 15.6cm
3/ min;
2.2), leakage point detects: adopt soap bubble method to the pressure regulator valve in oil cooler, by-pass valve, three hexagonal socket head plugs, technique silently and seal pad place detect, detecting the leakage agent adopted is OKS2811 Leak Detection liquid, finds that leaking appears in a hexagonal socket head plug place after testing;
2.3) result judges and process: after testing, the oil cooler slip in step 2.1 is more than 10cm
3/ min, and step 2.2 finds leak source, then deteminate machine oil cooler is defective, again detects to qualified after reprocessing.
The gas being filled with oil cooler in the present embodiment 2 step 2.1 adopts dry pressurized air.
Embodiment 3
Leak Detection is carried out to the oil cooler that model is 1013000-81D, comprises the following steps:
1), interface shutoff connect checkout equipment:
Oil cooler is fixed on pallet by operation bolt, carries out shutoff to the full flow type machine filter mouth of oil cooler; The heat eliminating medium outlet of oil cooler connects, and cooling medium inlet connects charger;
2), Leak Detection and result judge:
2.1), slip detects: to oil cooler inner inflatable, charge pressure is 4bar, and inflationtime is 55 seconds; Then wait for pressure equilibrium, equilibration time is 10s, and the measurement pressure in the oil cooler after pressure equilibrium is 3.6bar; Then carry out slip detection by leakage detector to oil cooler, detection time is 10 seconds, detects and show that slip is 106.6cm
3/ min;
2.2), leakage point detects: adopt soap bubble method to the pressure regulator valve in oil cooler, by-pass valve, three hexagonal socket head plugs, technique silently and seal pad place detect, detecting the leakage agent that adopts is OKS2811 Leak Detection liquid, find after testing technique silently and seal pad place occur leaking;
2.3) result judges and process: after testing, the oil cooler slip in step 2.1 is more than 10cm
3/ min, measure the acceptability limit of pressure lower than 3.8 ~ 4.1bar, and step 2.2 finds leak source, then deteminate machine oil cooler is defective, again detects to qualified after reprocessing.
The gas being filled with oil cooler in the present embodiment 3 step 2.1 adopts dry pressurized air.
Claims (3)
1. oil cooler leakage detection method, is characterized in that comprising the following steps:
1), interface shutoff connect checkout equipment:
Oil cooler is fixed on pallet by operation bolt, and the sealed bolster plate on pallet carries out shutoff to by-pass valve in oil cooler and pressure regulator valve side pipe mouth, and the full flow type machine filter mouth of oil cooler adopts shutoff frock to carry out manual shutoff; Utilize the mouth of pipe of pressure regulator valve side to inflate workpiece, the mouth of pipe is connected with leak test instrument, and sensor in leakage instrument detects the flowing reaching gas after equilibrium stage, and is converted to slip;
2), Leak Detection and result judge:
2.1), slip detects: to oil cooler inner inflatable, charge pressure is 4bar, and inflationtime is 55 seconds; Then wait for pressure equilibrium, equilibration time is 10s, and the measurement pressure in the oil cooler after pressure equilibrium should be 3.8 ~ 4.1bar; Then carry out slip detection by leakage detector to oil cooler, detection time is 10 seconds;
2.2), leakage point detects: to the pressure regulator valve in oil cooler, by-pass valve, three hexagonal socket head plugs, technique silently and seal pad place detect, judge whether to there is leakage point;
2.3) result judges and process: if the oil cooler slip 1. in step 2.1 is not more than 10cm
3/ min, but step 2.2 finds leakage point, then measure after needing to reprocess oil cooler again, qualified, lets pass or 2. process according to flow process; If the oil cooler slip 2. in step 2.1 is more than 10cm
3/ min, but step 2.2 does not find leakage point, then need again to measure oil cooler, and qualified, let pass, again measure overproof, carry out water examination, water examination is qualified, directly rolls off the production line, and water examination finds that leak source is then reprocessed, until roll off the production line after qualified; If the oil cooler slip 3. in step 2.1 is more than 10cm
3/ min, and step 2.2 finds leakage point, then measure after needing to reprocess oil cooler again, qualified, lets pass or 2. process according to flow process.
2. oil cooler leakage detection method as claimed in claim 1, is characterized in that: the gas being filled with oil cooler in described step 2.1 adopts dry pressurized air.
3. oil cooler leakage detection method as claimed in claim 1, it is characterized in that: described step 2.3 adopts soap bubble method may carry out detection judgement by leakage position to each in oil cooler, and detecting the leakage agent adopted is OKS2811 Leak Detection liquid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510389420.8A CN104931214A (en) | 2015-07-06 | 2015-07-06 | A machine oil cooler leakage detection method |
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| CN201510389420.8A CN104931214A (en) | 2015-07-06 | 2015-07-06 | A machine oil cooler leakage detection method |
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| CN201510389420.8A Pending CN104931214A (en) | 2015-07-06 | 2015-07-06 | A machine oil cooler leakage detection method |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106525346A (en) * | 2016-12-05 | 2017-03-22 | 蚌埠市国乐汽配有限公司 | Production leakage detection process and system thereof for automobile engine oil coolers |
| CN106595960A (en) * | 2016-12-29 | 2017-04-26 | 广东鸿图科技股份有限公司 | Test method of accuracy and stability of differential pressure leakage detection equipment |
| CN106644282A (en) * | 2016-12-05 | 2017-05-10 | 蚌埠市国乐汽配有限公司 | Automobile engine oil cooler production leakage detecting process |
| CN108956051A (en) * | 2018-10-15 | 2018-12-07 | 苏州绿控传动科技股份有限公司 | A kind of portable airtight test method |
| CN109883626A (en) * | 2019-01-28 | 2019-06-14 | 北京铂阳顶荣光伏科技有限公司 | A kind of water route detection device, device and method |
| CN112857137A (en) * | 2021-01-14 | 2021-05-28 | 白银有色集团股份有限公司 | Cleaning device and cleaning method for oil cooler of air compressor |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106525346A (en) * | 2016-12-05 | 2017-03-22 | 蚌埠市国乐汽配有限公司 | Production leakage detection process and system thereof for automobile engine oil coolers |
| CN106644282A (en) * | 2016-12-05 | 2017-05-10 | 蚌埠市国乐汽配有限公司 | Automobile engine oil cooler production leakage detecting process |
| CN106644282B (en) * | 2016-12-05 | 2020-02-18 | 蚌埠市国乐汽配有限公司 | Production leakage detection process for automobile oil cooler |
| CN106595960A (en) * | 2016-12-29 | 2017-04-26 | 广东鸿图科技股份有限公司 | Test method of accuracy and stability of differential pressure leakage detection equipment |
| CN108956051A (en) * | 2018-10-15 | 2018-12-07 | 苏州绿控传动科技股份有限公司 | A kind of portable airtight test method |
| CN109883626A (en) * | 2019-01-28 | 2019-06-14 | 北京铂阳顶荣光伏科技有限公司 | A kind of water route detection device, device and method |
| CN112857137A (en) * | 2021-01-14 | 2021-05-28 | 白银有色集团股份有限公司 | Cleaning device and cleaning method for oil cooler of air compressor |
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Application publication date: 20150923 |
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