Device and method for measuring maximum aperture of filter element by dry method

• Main Authors: WANG WEIYI, ZHAO SHIZHE, YANG PENG, LIANG LIZHI, GUO XINFENG, LIU JIANFENG
• Format: Patent
• Language: Chinese; English
• Published: 09.02.2011
• Subjects: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; PHYSICS; TESTING

The invention relates to a device and a method for measuring the maximum aperture of a filter element by a dry method. In the conventional filtering industry, apertures are measured universally by a bubble point test method; in the method, the filter element is tested in the state of complete immersing, so a test finishing point is difficult to judge due to the influence of the static pressure of infiltration liquid; and the absolute pressure of air inflow instead of pressure difference on both sides of air inflow and air discharge is detected in the measuring process, so a test result has the large deviation, and the numerical value of the maximum aperture of filter element cannot be reflected really. In the method of the invention, the maximum aperture is measured by a vacuum infiltration method so as to shorten the infiltration time substantially; the accuracy of measuring data is ensured by using a differential pressure method; and the influence of hydrostatic pressure in the state of the immersing on the