SU1699519A1 - Device for checking static strength of filter elements - Google Patents

Abstract

The invention relates to devices for testing filter elements for static strength, which makes it possible to determine the strength of a filter element by the action of a uniformly distributed load. The purpose of the invention is to provide a uniformly distributed load that simulates the effect of pressure forces on the filter element. The static strength of the filter element is tested by subjecting the working medium to pressure on the filter element being tested for strength through an intermediate element. The device for checking the static strength of the filter element includes a housing with a filter element, an intermediate flexible element is installed in the working cavity of the body, in contact with the filter element, the flexible element is designed as a membrane, the cavity between the membrane and the filter element can be filled with powder. 1 hp f-ly, 2 ill. (L

Description

The invention relates to hydraulic filters, in particular to devices for testing filter elements for static strength.

The purpose of the invention is to ensure uniform distribution of the load on the filter element.

FIG. 1 shows a device with a membrane attached to the wall of the housing; a slit is shown in FIG. 2 - device with an intermediate element made of powder (for example, metal), section.

The device includes a housing 1, a tested power element 2, sealing an intermediate element in the form of a groundwalk 3 (Fig. 1) or in combination with powder 4 (Fig. 2), a working cavity 5, a spindle 6 with a socket 7 for creating pressure , system 8 with travel sensor and tripod 9.

The device works as follows.

By creating a pressure P in cavity 5 (Fig. 1), the membrane is pressed against the filter element 2 evenly distributed over the surface of the intermediate element 3 with a load simulating the effect of the differential pressure D P on the filter element that occurs during the transportation of a liquid or gas through it .

The pressure value P is determined from the condition

P & P (Fg - Fc) AP. 4F, where F-. - the cross-sectional area of the trunk (-Roooffovod) - body 1;

about with so

SP

with

F - in the light area (live

cross section) of the filter element.

By creating a pressure P, the value of which is determined by the indicated formula, in the cavity 5 of the device (FIG. 2) the intermediate element 3 is pressed between the filter element and the intermediate element to powder 4, with which the cavity is filled. The load from the intermediate element 3 through the powder 4 is transferred to the filter element 2. The use of the powder eliminates sharp corners and narrow depressions.

The maximum hydraulic pressure drop iPn, which can occur during the operation of an object, determines the pressure of the hydraulic test of the filter element of the RTM and the pressure of the hydraulic shadow

filter element P

T

When testing the strength of the filter elements, depending on the type of static tests in the cavity 5, they create pressure, or pressure Ргк, and if the filter element is not destroyed under pressure РГр, increase pressure in. Q

0

five

5 until the filter element is destroyed. The value of the fracture pressure is fixed,

Claims (2)

1. A device for testing the static strength of a filter element, comprising a housing including a working medium chamber with a supply nozzle, and a filter element, are provided. in order to ensure uniform distribution of the load on the filter element, the device is equipped with a flexible movable intermediate element in contact with the filter element, sealing the working environment chamber. 2. A device according to claim 1, characterized in that the intermediate element at the periphery is hermetically attached to the wall of the housing. b 1 / 77 / t fm FIG. 2 /////////