SU1237236A1 - Filtering element - Google Patents

Description

The invention relates to mechanical engineering and is intended for filtering liquid media, mainly oils and topes, for example, for self-cleaning filters of internal combustion engines.

A filter cartridge is known which contains a perforated tube, on which filter cloth is worn, pressed against the tube with helically wound wire.

Due to pressing the filter fabric directly onto the perforated pipe surface, the flow area of the fabric is used only on surface areas that coincide with the perforation holes. Thus, there is an inefficient use of the surface of the filter material.

The purpose of the invention is to increase the efficiency of use of the surface of the filter material.

This goal is achieved by the fact that the filter element containing a perforated cylindrical frame, filter material, a spiral element that fixes the filter material on the frame, provides a supporting spiral element between the filter material and the frame, both spiral elements having the same clamp and direction winding, and the distance between the axes of adjacent turns of the supporting and securing spirals is 1.25-2 spiral diameters.

The filter material, resting on the helix worn on the perforated frame, does not fit tightly the surface areas of the frame between 12727261

versti mi perforation. As a result, the proportion of the surface of the filtration material involved in filtering, i.e. decreases

5 total blockage of the filter material through passage.

The drawing shows a filter element, a longitudinal section.

The filtering element contains a car 0 tangent (perforated pipe) I, a supporting spiral 2 located on it, a filter sheet material (fabric) 3 located above the supporting spiral, a fixing spiral 4, an end cap 5 and a bushing head 6. the cap is a perforated tube, filtering sheet material and both spirals are attached with polymer glue 7.

20 Wiping fluid (oil, fuel) enters the filter element from the outside, is filtered through the fabric 3, enters the perforated pipe I, and is discharged through the fitting 6. Based on experimental data, it was found that the largest value of the useful surface of the filter material (K) is provided in a given filter 30 to the rubbing element, if the value of t is to be chosen within 1, 25-2, where

25

t is the pitch between the supporting and securing spirals; d is the diameter of the helix

35 Smaller values give a sharp decrease in K, large values can cause deformation of the material under the effect of pressure drop and partial loss of its useful surface.

40 due to adherence to the surface of the frame.

Compiled by L. Buzmakova Editor N. Kistutulinets Tehred L. Oleynik Proofreader T. Kolba

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VNISHI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Rauschska nab., 4/5

Production and printing company, Uzhgorod, st. Design, D

t is the pitch between the supporting and securing spirals; d is the diameter of the helix

Smaller values give a sharp decrease in K, large values can cause deformation of the material under the effect of pressure drop and partial loss of its useful surface.

due to adherence to the surface of the frame.

Claims (1)

A FILTER ELEMENT comprising a cylindrical perforated frame, a filter material, a spiral element securing the filter material on the frame, adhering in that, in order to increase the efficiency of use of the surface of the filter material, the filter element is provided with a supporting spiral element mounted between the filter material and the frame, both spiral elements are made with the same pitch and direction of winding, and the distance between the axes of adjacent turns of the supporting and fixing spirals equal to 1, 25-2 diameters of the spiral. SU ,, „1237236