SU1255166A1 - Self-cleaning filter - Google Patents

Description

The invention relates to the field of filtration and is intended for the purification of liquids, in particular fuel and oils, in systems of internal combustion engines in which the regeneration (cleaning) of the filtering surface is countercurrent during operation.

The purpose of the invention is to increase the period of autonomous (maintenance-free) filter operation by increasing the efficiency of regeneration of filter elements.

The drawing shows a filter, a longitudinal section.

The filter includes a housing 1 with connections for cleaning 2 and discharging 3 purified liquid, the outer 4 separated into two coaxial chambers and the inner 5 with a cylindrical septum 6 with windows 7 in the lower part. The outer chamber 4 has a bottom in the form of a reverse truncated cone, the smaller base of which is adjacent to the cylindrical partition 6 at the lower edges of the windows 7. The lower part of the inner chamber 5 (below the windows 7) serves as a dust collector 8 having a plug 9 for removing soils. The chambers 4 and 5 of the housing 1 contain porous filter elements 10 and 11. The filter elements 11 of the inner chamber 5 have a pore size larger than the pore size of the filter elements 10 located in the outer chamber 4 The self-cleaning filter has a regenerating device containing a distribution mechanism 12 to remove the filter elements 10 and 11 from the filtration process, which has a rotary mechanism 13, hydron-, soy 14 (for example, of the piston type) for supplying the washing liquid to the regeneration. The washing liquid to the hydraulic pump 13 is supplied through the pipe 15 from the filtrate cavity.

The self-cleaning filter operates as follows.

The filtered fluid is pumped (not shown in the drawing) to the liquid supply pipe 2, enters the outer chamber 4 where the filter elements 10 are located. The passage from the outside to the inside through the filter wall of the filter elements 10 is cleaned and passed through the pipe 3 to the consumer . Part of the filtered fluid

flows through the pipeline 15 into the hydraulic pump 14. At the same time, part of the liquid entering the outer chamber 4 (about 15%) moves downward, passes through the openings 7 of the cylindrical partition 6 into the inner chamber 5 is then cleaned on filter elements 11 having a pore size larger than the pore size filter elements 10, enters the cavity of the purified liquid and then is discharged through the nozzle 3. When retained on the surface of the filter elements 10 of the outer chamber 4 soil particles create a significant hydraulic resistance, sig alu sensor (sensors and to filter the control unit not shown) of the rotating mechanism 13 rotates the switchgear mechanism of 12, which reaches the next filter elements 10 and 11 of the two chambers 4 and 5 and disconnects them from the filtration cycle. Under the action of the return flow of the filtrate, which comes from the hydraulic pump 14, the contaminant particles deposited on the filter elements 10 are washed away, captured by the flow of fluid passing from the outer chamber 4 through the windows

7 cylindrical partitions 6 into the inner chamber 5. Thereby preventing the possibility of involving them (washed particles of contaminants) in

A flow of fluid passing through the filter elements 10 and their secondary deposition on the latter. In the inner chamber 5, the largest particles of contaminants and products of regeneration are deposited in the dust collector 8; since the latter (filtering elements) receive a more concentrated suspension, and the fineness of screening them is lower. The smaller fineness of screening out the filtering elements 11 of the inner chamber 5 as compared with the filtering elements 10 of the outer chamber 4 provides also the creation of an efficient flow formed in the outer chamber 4 and entering the inner chamber 5.

8 during the regeneration of the filter elements 10 of the outer chamber 4 at the same time and regeneration

. 312551664

filter elements 11. internal and sediment into the filter chamber 8. chamber 5. At the same time, the enlarged con- centrations from the filter container 8 remove contaminants from the filter periodically from surface samples of the filter elements 10 ku 9-.

Compiled by I. Dybovska Editor S. Patrusheva Tehred L. Serdyukoby Proofreader V. But g4

Order 4739/5 Circulation 663 Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zht35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, st. Project, 4

Claims (1)

A SELF-CLEANING FILTER containing a housing with fluid inlet and outlet nozzles, porous filter elements, a regenerating device with a rotary mechanism, and a dirt collector, characterized in that, in order to increase the autonomous (maintenance-free) filter life by increasing the efficiency of the regeneration of the filter elements, the filter is equipped with a cylindrical partition with windows in the lower part located inside the case coaxially to it with the formation of two chambers, of which the outer one has a bottom in the form of a reverse truncated a nus, the smaller base of which is adjacent to the cylindrical partition at the level of the lower edges of the windows, while the pore size of the filter elements installed in the inner chamber is larger than the pore size of the filter elements mounted in the outer chamber. SU „, 1255166 A1 .1255166