SU436668A1 - Filter element - Google Patents

Description

I

The invention relates to the field of mechanical engineering and is intended for the purification of liquid and gas, in particular for the purification of oil and fuel in internal combustion engines.

Filtering elements are known that contain a paper corrugated tape with corrugations of different lengths placed around a perforated tube.

However, these elements have a small filtering surface and low rigidity.

The aim of the invention is to increase the filtering surface and increase the stiffness of the element.

For this, the number of corrugations of maximum length is determined by the ratio

d, ts (vn + 2e) P

and the number of intermediate corrugations in the sector between the corrugations of the maximum length is the ratio

 BH, 2c)

one,

Apr -

РК

and DH

inner and outer diameters of the tape, mm:

p - maximum corrugation width, mm;

c is the distance from the top of the corrugation to its maximum width, mm.

FIG. 1 shows the proposed element, a longitudinal section and section AA; in fig. 2 - the ribbon from which the corrugated filter element is folded is bent; in fig. 3 - proposed item with

four nromelchnymi.my corrugations in the sector of meladu corrugations of maximum length; in fig. 4 - the same, with five corrugations; in fig. 5 - the same, with six corrugations; on phpg. 6 - the same, with seven intermediate corrugations.

The filter element consists of a corrugated, for example paper, tape 1, wrapped around an internal perforated tube 2, glued into a ring and protected with a broken perforated tube 3. Ends

4 ф of the lining element are filled, for example, with plastic, which ensures tightness between the external and internal cavities of the element. Tape 1 is made in such a way that

The maximum length corrugated corrugated maladus, defining the broken "O" and the inner diameters of the filter element, are routed by weft corrugations of different lengths. Number (K) of corrugations maximum

lengths and number of intermediate corrugations

(Cyrus) in the sector between corrugations of maximum length is determined in accordance with the conversion ratios with rounding to an integer.

The length of the intermediate corrugations should ensure the maximum possible filling of the element space.

In the filter element shown in FIG. 6, the length of intermediate corrugations I, 1P, V, VII is equal, for example, to / 3 the length of the normal corrugation, the length of the corrugations P and VI - / 3 the length of the normal corrugation, the length of the corrugation IV - / e of the length of the normal corrugation.

Rational placement of intermediate corrugations can be achieved, for example, by graphing. Consider a variant of such a construction for the case of seven intermediate corrugations. For this, from one center O (see Fig. 6), two circles are made with predetermined diameters equal to the outer diameter of the filter element DH, reduced by 2 seconds, and the inner diameter, increased by 2 seconds.

The value of c is determined experimentally, it depends on the thickness and quality of the material from which the filter element is made.

On a circle with a diameter vp + 2 s lay an arc equal to p. Then, through the ends of the arc p, the radii of a circle with a diameter of /) n - 2 s are drawn; these will be the axial lines of the corrugations of normal length.

FIG. 6 the following notation is accepted: MN - arc of a circle with a diameter of DH - 2c, bounded by radii: I - VII - intermediate points obtained on the arc MN by dividing it into parts equal to the arc p; the last digit indicates the number of intermediate corrugations / (ex.

The arc on a circle with a diameter is divided in half, get the point S and connect it with straight lines with the points M and N. The obtained lines are the sides of two adjacent corrugations of maximum length.

Inside the SMN sector, lay the segment EF, parallel to the chord MN and equal in magnitude to p. Points E and P are connected by straight lines with point IV on the M-N arc, and the dimensions of the intermediate central corrugation IV are obtained. A similar construction is carried out for corrugations II and VI, using the EMIV and FNIV sectors. Using the resulting new sectors, the corrugations of I, III, V, VIL are constructed in a similar way.

Intermediate corrugations, with their ends, form peculiar supports for the filtering surfaces of adjacent corrugations and prevent their closure when the pressure difference in the outer and inner cavities of the element is increased.

Thus, get a sector with two

adjacent sides of corrugations maximum

length and seven intermediate corrugations.

The number of such sectors is equal to the number

corrugations of maximum length.

In order to increase the gap between the corrugations of the maximum length, the value of s in the calculation

can be reduced to 0.

The variants with four and six intermediate corrugations (see Figs. 3 and 5) are characterized by an asymmetrical arrangement of intermediate corrugations in the sector.

For the variant with five intermediate corrugations, it is possible both their symmetrical arrangement (see Fig. 4) and asymmetrical with ensuring the maximum possible filling of the space between the corrugations

maximum length.

Filtered media, such as the oil of a lubrication system for an internal combustion engine, passes under pressure through a non-perforated outer tube 3, then through

the corrugated tape I is in the inner cavity of the element, while the particles that pollute the oil remain on the outer surface of the belt 1. The cleaned oil leaves through the perforated inner tube 2 and enters the main oil line and to the engine parts.

Subject invention

A filter element containing a corrugated tape arranged around a perforated tube, for example, of paper with corrugations of different lengths, characterized in that, in order to increase the filtering surface and increase the rigidity, the number of corrugations of maximum length is determined by the relation:

f. (h-2s)

R

and the number of intermediate corrugations in the sector between the corrugations of maximum length - the ratio

., city (He-2c). And by - ::: t

etc

rk

YVN to DK - inner and outer diameters of the tape, mm;

p - maximum corrugation width, mm;

c is the distance from the top of the corrugation to its maximum width, mm.

one

 3

fpuz.S