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滚动隔膜是一种位移量可以很大的滚动密封隔膜。由于它的滚动作用,所以在往复运动过程中摩擦力极小,灵敏度很高,两三公分的水柱压力都能反应出来,它没有弹性梯度(也有人叫弹性损耗),也就是说在它的行程范围内的任意一点其有效面积都是相等的,出力大小不变,滞纹现象极小,使用寿命也很长,最多的可达1亿次。因此它是一种理想的气(液)动密封元件,而被广泛地应用于土工仪器中。我国自
Rolling diaphragm is a displacement can scroll seal diaphragm. Because of its rolling effect, so in the process of reciprocating friction is very small, high sensitivity, two or three centimeters of water column pressure can react, it has no elastic gradient (also known as elastic loss), that is to say in its Any point within the travel range of its effective area are equal, the output size unchanged, hysteresis is minimal, the service life is also very long, up to 100 million times. Therefore, it is an ideal gas (liquid) dynamic sealing components, which are widely used in geotechnical instruments. My country since