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常见的气密性泄漏检测方法

发布时间:2017-11-20 11:40:16   发布人:
压力表疲劳试验台的密封性是指在给确定被测密封件加一定压力介质的情况下,允许介质泄漏的极限量。
The tightness of the fatigue test stand for pressure gauges refers to the allowable limit of the leakage of the medium in the case of adding a certain pressure medium to the sealed part to be measured.
气密性检测可根据测试手段不同分为两大类:一类是通过目测的气泡量来判断,即在向工件腔内充一定压力的气体时,将其浸入水中或涂肥皂泡,根据目测肥皂泡或水中的气泡来判断工件是否有漏及泄漏的成都。
Air tightness test according to different testing methods are divided into two categories: one is judged by the amount of air bubbles in the visual, gas to the workpiece cavity pressure, be immersed in water or lather, to judge whether the workpiece leakage and leakage according to visual bubbles and water bubbles in Chengdu.
目前这种方法在冰箱、空调的密封管道以及箱体检漏时仍普遍采用。但这种方法测试效率低,受主观因素影响较大,同时用这种方法测试后,还必须对工件进行干燥和防锈处理。
At present, this method is still widely used in refrigerators, air conditioning sealing pipes and box leak detection. But this method has low test efficiency and is affected by subjective factors. At the same time, the drying and antirust treatment of the workpiece must be done by this method.
另一类是通过传感器的信号输出来判断,即向工作腔内充一定压力的气体,通过压力传感器的信号输出来判断工件是否有漏,并计算出其泄漏率,即单位时间内压力传感器输出的变化值。
The other is through the sensor signal output judgment, that is to the work cavity filled with a certain pressure of gas, through the pressure sensor signal output to determine whether the leakage of the workpiece, and calculate its leakage rate, that is, the unit pressure sensor output changes in the unit time.
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