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A machine oil cooler leakage detection method

An oil cooler, leak detection technology, applied in the direction of detecting the appearance of the fluid at the leak point, by measuring the acceleration and deceleration rate of the fluid, and using the liquid/vacuum degree for liquid tightness measurement, etc., which can solve the complicated operation and long cycle time. , oil cooler corrosion and other problems, to achieve the effect of simple and convenient operation, short measurement process rhythm, accurate leak detection and positioning

Inactive Publication Date: 2015-09-23
CHINA FIRST AUTOMOBILE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such detection method has the following disadvantages: 1. The oil cooler is immersed in water for leak detection, which cannot simulate the normal working condition of the oil cooler on the engine, and easily causes quality problems such as rust of the oil cooler; the leak test of the water immersion method The mode operation is cumbersome, the beat is long, and it cannot adapt to automated large-scale production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Leak testing for oil cooler model 1013000-81D includes the following steps:

[0019] 1), the interface is blocked and connected to the detection equipment:

[0020] Use process bolts to fix the oil cooler on the tray, and seal the full-flow machine filter port of the oil cooler; the outlet of the cooling medium of the oil cooler is connected, and the inlet of the cooling medium is connected to the inflatable device;

[0021] 2), leak detection and result judgment:

[0022] 2.1) Leakage rate detection: Inflate the oil cooler with air, the inflation pressure is 4bar, and the inflation time is 55 seconds; then wait for the pressure to balance, the balance time is 10s, and the measured pressure in the oil cooler after pressure balance is 3.9bar; Then, the leak rate of the oil cooler is detected by a leak detector. The detection time is 10 seconds, and the leak rate is 0.76cm 3 / min;

[0023] 2.2) Leak point detection: use the soap bubble method to detect the pressure reg...

Embodiment 2

[0027] Leak testing for oil cooler model 1013000-81D includes the following steps:

[0028] 1), the interface is blocked and connected to the detection equipment:

[0029] Use process bolts to fix the oil cooler on the tray, and seal the full-flow machine filter port of the oil cooler; the outlet of the cooling medium of the oil cooler is connected, and the inlet of the cooling medium is connected to the inflatable device;

[0030] 2), leak detection and result judgment:

[0031] 2.1) Leakage rate detection: Inflate the oil cooler with air, the inflation pressure is 4bar, and the inflation time is 55 seconds; then wait for the pressure to balance, the balance time is 10s, and the measured pressure in the oil cooler after pressure balance is 3.9bar; Then, the leakage rate of the oil cooler is detected by a leak detector. The detection time is 10 seconds, and the leakage rate is 15.6cm. 3 / min;

[0032] 2.2) Leak point detection: use the soap bubble method to detect the press...

Embodiment 3

[0036] Leak testing for oil cooler model 1013000-81D includes the following steps:

[0037] 1), the interface is blocked and connected to the detection equipment:

[0038] Use process bolts to fix the oil cooler on the tray, and seal the full-flow machine filter port of the oil cooler; the outlet of the cooling medium of the oil cooler is connected, and the inlet of the cooling medium is connected to the inflatable device;

[0039] 2), leak detection and result judgment:

[0040] 2.1) Leakage rate detection: Inflate the oil cooler with air, the inflation pressure is 4bar, and the inflation time is 55 seconds; then wait for the pressure to balance, the balance time is 10s, and the measured pressure in the oil cooler after pressure balance is 3.6bar; Then, the leakage rate of the oil cooler is detected by a leak detector. The detection time is 10 seconds, and the leakage rate is 106.6cm 3 / min;

[0041] 2.2) Leak point detection: use the soap bubble method to detect the press...

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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 [0001] The invention relates to a leakage detection method of auto parts, in particular to a leakage detection method of a heavy oil cooler, which belongs to the technical field of diesel engine production. Background technique [0002] In the automotive industry, the leak detection of the engine oil cooler usually adopts the wet leak test technology of the water immersion method, which immerses the oil cooler in a container filled with water and fills the oil cooler with compressed air. There are blister overflow methods to detect leaks from components. Such detection method has the following disadvantages: 1. The oil cooler is immersed in water for leak detection, which cannot simulate the normal working condition of the oil cooler on the engine, and easily causes quality problems such as rust of the oil cooler; the leak test of the water immersion method The mode operation is cumbersome, the beat is long, and it cannot adapt to automated large-scale produ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M3/32G01M3/12
Inventor 陈磊史胜祥朱炜张俊雄平志谦
Owner CHINA FIRST AUTOMOBILE
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