WO2015072874A1

WO2015072874A1 - Oil filter

Info

Publication number: WO2015072874A1
Application number: PCT/RU2013/001005
Authority: WO
Inventors: Борис Константинович ЗУЕВ
Original assignee: Борис Константинович ЗУЕВ
Priority date: 2013-11-12
Filing date: 2013-11-12
Publication date: 2015-05-21

Abstract

An oil filter containing a housing, a cap, a cap reinforcement, an anti-drain valve and an overflow valve, and a filter element including a filter material positioned between an upper end cap and a lower end cap. The lower end cap of the filter element is spring-loaded, relative to the housing, in the direction in which the filter element is pressed against the cap reinforcement. The central portion of the upper end cap is provided with two axially-arranged annular elements which protrude outwardly from the filter element to different heights, and which are connected to one another by means of ribs, forming overflow valve channels. An inner annular element has a greater height and presses against the cap reinforcement, defining a gap between the cap reinforcement and an outer surface of the upper end cap, said gap being necessary for oil to pass through to the filter material; the height of an outer annular element is less than that of the inner annular element by an amount which defines a gap between the cap reinforcement and the outer annular element, said gap being necessary for oil to pass through to the overflow valve. In accordance with the invention, the overflow valve and the anti-drain valve are arranged in parallel in the oil filter, thus precluding filtered particles from entering an engine during a cold start.

Description

OIL FILTER

Technical field

The invention relates to the field of engine manufacturing, namely the production of oil filters for internal combustion engines. State of the art

Known oil filter according to patent US 4935127, comprising a housing, a cover, an amplifier, an anti-drain valve, an annular bypass valve with a washer and a spring, and a filter curtain with upper and lower covers installed at its ends. In this case, the anti-drainage and bypass valves are made as a separate unit, which increases the complexity of manufacturing the feed due to the need to manufacture the body and cover of the bypass valve and their assembly.

Closest to the present invention is the oil filter according to US Pat. No. 3,669,144, comprising a housing, a cover, a cover amplifier, anti-drainage and bypass valves, as well as a filter element including filter material located between the upper and lower end caps. In this case, the lower end cover of the filter element is spring-loaded relative to the housing in the direction of pressing the filter element to the cover amplifier. The disadvantage of this design is the high complexity of manufacturing, due to the fact that the top cover and the bypass valve are made separately. In addition, in this design, anti-drainage and bypass valves are installed in series, which does not exclude the ingress of filtered dirt particles into the engine during cold start.

The objective of the invention is to improve the manufacturability of the design and to prevent the ingress of filtered particles from the dirty cavity of the filter into the engine during cold start.

Disclosure of invention

The specified problem is solved in an oil filter containing a housing; cover; cover amplifier; anti-drainage and bypass valves; as well as a filter element including filter material, located between the upper and lower end caps, and the lower end cover of the filter element is spring-loaded relative to the housing in the direction of pressing the filter element to the amplifier cover.

According to the invention, in the central part of the upper end cap there are two axially arranged annular elements protruding outward from the filter element at different heights and interconnected by ribs, forming channels of the bypass valve, while the inner ring element has a large height and abuts against the cover amplifier, defining a gap between the cover amplifier and the outer surface of the upper end cover, which is necessary for oil to pass to the filter material, and the height of the outer ring element is less the height of the inner ring element by an amount that determines the gap between the cover amplifier and the outer ring element, necessary for the passage of oil to the bypass valve.

This embodiment of the oil filter allows you to press the upper end cap directly to the amplifier, providing the necessary emphasis and tightness, eliminates the need for spacers, and also allows you to place the bypass valve in the upper end cap.

In this case, the bypass and anti-drainage valves are parallel located, which eliminates the ingress of filtered particles into the engine during cold start. In addition, the location of the bypass and anti-drain valves on the top cover reduces the complexity of manufacturing the filter.

The outer and inner annular elements can be made protruding from the upper end cap into the filter element, forming a bypass valve seat. In this case, preferably the upper end cap has a perimeter around the flange covering the filter material, and the protrusion height of the outer and inner ring elements inside the filter element is 0.5 to 1 of the height of the specified flange.

This allows you to move the saddle of the bypass valve from the inner surface of the upper end cover of the filter element, on which, in the manufacture of this filter element, adhesive is applied to fasten the filter material to this cover, thereby eliminating the possibility of glue getting on the surface of the seat of the bypass valve.

Preferably, on the lower part of the inner annular element there are several posts connected by a jumper, and on the bottom the end cover has a central protrusion directed inside the filter element and in contact with the specified racks.

This embodiment of the end caps of the filter element allows you to refuse to use the internal perforated spacer tube in it, thereby reducing the cost of its manufacture.

At the same time, protrusions for stopping the bypass valve spring can be made on the struts. Thanks to these protrusions, the bypass valve with the upper end cap and spring can be assembled as a separate assembly unit, which simplifies the assembly process and allows you to automate the assembly of the filter.

Preferably, the outer surface of the outer annular element comprises cylindrical and conical sections, the diameter of the cylindrical section being substantially equal to the diameter of the central hole in the anti-drain valve, and the larger diameter of the conical section is 1, 01 - 1.03 of this diameter, while on the anti-drain valve around the perimeter of the central the hole is made tide, the height of which is essentially equal to the height of the specified conical section. This embodiment of the seat under the anti-drainage valve allows you to fix its cylindrical tide with an interference fit, ensuring tightness, but at the same time avoid undesirable axial deformation of its disk-shaped part that occurs when its inner diameter is stretched.

At the upper end of the anti-drainage valve, at least three protrusions in contact with the cover amplifier can be made. This allows you to lock the anti-drain valve in the axial direction and provide a sufficient flow area for oil from the inlet of the amplifier to the bypass valve.

Preferably, the upper part of the annular inner element in contact with the amplifier of the cover is made pointed, therefore, it is easily deformed in contact with the amplifier of the cover, providing a better fit of the upper end cover to the surface of the amplifier at the junction, thereby ensuring reliable tightness.

Mostly the top cover is made of heat-resistant plastic, for example, glass-filled polyamide.

Features and advantages of the invention will be better understood from the description of the preferred options for its implementation with reference to the attached drawings. Brief Description of the Drawings

In FIG. 1 shows a filter according to the invention, a perspective view with a quarter cut out;

in FIG. 2 - place A in FIG. 1 on an enlarged scale;

in FIG. 3 separately shows the upper end cap of the filter element, a perspective view with a quarter cut out.

An embodiment of the invention

As shown in FIG. 1 and 2, in the housing 1 with a cover 2 and a cover amplifier 3 having inlet openings 4 for passage of unfiltered oil, a filter element 5 is located. The filter element 5 consists of a filter material 6, an upper end cover 7 located on the oil inlet and outlet from the filter, and the lower end cover 8 located on the opposite side of the filter element 5. Between the lower end cover 8 and the housing 1 is installed a spring 9 (Fig. 1), which presses the filter element 5 to the amplifier 3 of the cover.

In the central part of the upper end cover 7, two axially arranged annular elements 10 and 11 are made, protruding outward from the filter element 5 at different heights and interconnected by ribs 12 (Fig. 3), forming channels 13 (Fig. 1, 2) of the bypass valve 14. In this case, the inner ring element 10 has a large height, so that the filter element 5 abuts against the cover amplifier 3 by the upper part 15 of the indicated inner ring element 10. The upper part 15 of the inner ring element 10 is made pointed, therefore, it can easily be ormiruetsya in contact with the amplifier cover 3, providing a snug fit of the annular inner member 10 to cover the surface of the amplifier 3, thereby ensuring the tightness of joint.

The height of the protrusion of the inner annular element 10 above the outer surface of the upper end cover 7 forms a gap hi between the end face of the upper end cover 7 and the cover amplifier 3, which determines the flow area required for oil to pass from the inlets 4 of the cover amplifier 3 to the filter material 6.

The height of the outer ring element 11 is less than the height of the inner ring element 10 by an amount defining the gap h2 between the amplifier 3 the cover and the outer annular element 11, necessary for the passage of oil to the bypass valve 14.

Between the cover amplifier 3 and the end face of the upper end cover 7, there is an anti-drain valve 16 made of an elastic rubber-like material in the form of a disk with a central hole. Along the perimeter of the central hole of the anti-drainage valve 16 from the side of the amplifier 3 of the cover several tides 17 are filled, and from the side of the upper end cover 7 there is a cylindrical bead 18 (Fig. 2).

An anti-drain valve 16 (Fig. 1, 2) is mounted on the outer surface of the outer annular element 11 of the upper end cap 7 and abuts with its peripheral part in the amplifier 3 of the cap, ensuring the tightness of the joint due to elastic deformation during assembly. In addition, the tides 17 located along the perimeter of the Central hole of the anti-drain valve 16, also abut against the amplifier 3 of the cover, excluding axial movement of the Central part of the anti-drain valve 16.

The outer surface of the outer annular element 11 is formed by cylindrical and conical sections 19 and 20 (Fig. 2, 3), and the diameter of the cylindrical section 19 is essentially equal to the diameter of the Central hole in the anti-drain valve 16 (Fig. 1, 2) to avoid deformation, and the larger diameter of the base of the conical section 20 (Fig. 2, 3) is 1.01 - 1.03 of the diameter of the specified cylindrical section 19. Moreover, the height of the conical section 20 is essentially equal to the height of the cylindrical collar 18 (Fig. 2), made along the perimeter of the central hole I antidrenazhnom valve 16 (FIGS. 1, 2). As a result, the anti-drain valve 16 is securely fixed in the filter design, while leaving sufficient clearance b2 for oil to flow to the bypass valve 14. In addition, the presence on the outer surface of the outer annular element 11 of the conical and cylindrical sections 19 and 20 allows an interference fit of the cylindrical collar 18 of the anti-drainage valve 16 to the outer annular element 11 and, therefore, the necessary tightness, while eliminating undesirable axial deformation of the anti-drainage valve 16, which can It would occur when the central hole is stretched.

The bypass valve 14, spring-loaded with a spring 21 through the washer 22, blocks the channels 13 formed by the outer annular element 11, the inner annular element 10 and the connecting ribs 12 (Fig. 3). The ribs 12 have such a height that, when the sharp edge of the upper part 15 of the inner annular element 10 deforms under the action of the spring 9 (Fig. 1) and the forces arising from the action of pressure on the upper end cover 7 and the lower end cover 8 when the filter is working, between the ribs 12 and the amplifier 3 covers the minimum clearance. Thus, the ribs 12 perform the function of safety support elements, which in case of an unforeseen increase in the load on the filter structure will absorb the load, while maintaining the operability of the structure.

The second end of the spring 21 (Fig. 1, 2) has a smaller diameter and abuts against the protrusions 23 made on the uprights 24 of the upper end cover 7. The uprights 24 are connected by a jumper 25. The uprights 24 perform the function of a spacer between the upper and lower end caps 7 and 8 and perceive axial forces from oil pressure on these covers during engine operation. Jumper 25 increases the rigidity of the racks 24.

The lower end cover 8 has a central protrusion 26, in which a step 27 is made (Fig. 1) to support the spring 9. At the upper end of the central protrusion 26, an annular element 28 is made along which the racks 24 are centered. In the jumper 25 there is a central hole, which includes the remainder of the gate of the lower end cover 8, along which the upper end cover 7 can be centered relative to the lower end cover 8, excluding the annular element 28. Between the uprights 24 passages 29 are formed connecting the clean cavity 30 with the central hole in the amplifier 3 flanges for flowing clean oil into the engine. Between the outer surface of the filter element 5 and the housing 1 there is a “dirty” cavity 31 in which filtered oil-contaminating particles accumulate. The amplifier 3 covers, the upper end cover 7 and the anti-drain valve 16 form a distribution oil cavity 32, which receives unfiltered oil from the engine.

At the ends of the outer and inner annular elements 11 and 10 facing the filter element 5, a bypass valve seat 33 is formed in the form of two axially arranged annular protrusions, each of which in cross section has the shape of a triangle with a radius at the apex to reduce the contact area of the seat 33 with a bypass valve 14 to increase its tightness. The upper end cap 7 has a flange 34 around the perimeter, covering the filter material 6, and the protrusion height of the outer and inner annular elements 11, 10 inside the filter element 5 is 0.5 to 1 of the height of the flange 34. This allows you to move the seat 33 of the bypass valve 14 away from the inner surface of the upper end cover 7, on which glue is applied to fasten this end cover 7 with filter material, thereby eliminating the possibility of glue getting on the surface of the saddle 33 in the manufacture of the filter element.

Since the upper end cover 7 is a product of complex geometric shape, it is advisable to obtain it by casting, and for this heat-resistant plastic with the necessary strength is quite suitable. In particular, glass-filled polyamide can be used as heat-resistant plastic.

The oil filter operates as follows.

Unfiltered oil from the engine through the holes 4 (Fig. 1, 2) in the cover amplifier 3 enters a single oil distribution cavity 32. In the case of hot oil, its entire flow, deforming the anti-drain valve 16, enters the “dirty” cavity 31, is filtered, passing through the filter material 6, it enters a clean cavity 30 and, flowing through the passages 29, enters the engine lubrication system.

In the case of starting a cold engine, the viscosity of the oil prevents its passage through the filter material 6, while the pressure in the "dirty" cavity 31 rises. After reaching the specified pressure in the dirty cavity 31 and the distribution 32, the oil, acting through the channels 13 on the bypass valve 14, moves it, compressing the spring 21, thereby opening the oil passage into the clean cavity 30, bypassing the "dirty" cavity 31, and then into the system engine lubrication.

The presence of a central protrusion 26 made in the lower end cover 8 significantly reduces the volume of the clean cavity 30, thereby reducing the dry friction time of the engine during start-up.

Claims

CLAIM

1. An oil filter comprising a housing (1); cover (2); amplifier (3) covers; anti-drainage and bypass valves (16, 14); as well as a filter element (5) including filter material (6) located between the upper and lower end caps (7, 8), the lower end cover (8) of the filter element being spring-loaded relative to the housing (1) in the direction of pressing the filter element (5) to a cover amplifier (3), characterized in that in the central part of the upper end cover (7) there are two axially arranged annular elements (10, 11) protruding outward from the filter element (5) at different heights and interconnected ribs (12), forming channels ( 13) the bypass valve (14), while the inner ring element (10) has a large height and abuts against the cover amplifier (3), determining the gap (s) between the cover amplifier (3) and the outer surface of the upper end cover (7), which is necessary for the passage of oil to the filter material (6), and the height of the outer ring element (11) is less than the height of the inner ring element (10) by an amount that defines the gap (h2) between the cover amplifier (3) and the outer ring element (11), necessary for oil passage to the bypass valve (14).

2. The oil filter according to claim 1, characterized in that the outer and inner annular elements (11, 10) are made protruding from the upper end cap (7) inside the filter element (5), forming a seat (33) of the bypass valve (14).

3. The oil filter according to claim 2, characterized in that the upper end cap (7) has a flange (34) around the perimeter, covering the filter material (6), and the protrusion height of the outer and inner ring elements (11, 10) inside the filter element (5) is 0.5 - 1 of the height of said shoulder (34).

4. The oil filter according to claim 1, characterized in that on the lower part of the inner ring element (10) there are several posts (24) connected by a jumper (25), and on the bottom end cover (8) there is a central protrusion (26) ), directed inside the filter element (5) and in contact with the specified racks (24).

5. The oil filter according to claim 4, characterized in that on the uprights (24) protrusions (23) are made for the spring stop (21) of the bypass valve (14).

6. The oil filter according to claim 1, characterized in that the outer surface of the outer annular element (11) contains cylindrical and conical sections (19, 20), the diameter of the cylindrical section (19) being essentially equal to the diameter of the central hole in the anti-drain valve (16) ), and the larger diameter of the conical section (20) is 1, 01 - 1.03 of this diameter, while on the anti-drain valve (16) along the perimeter of the central hole there is a tide (18) whose height is essentially equal to the height of the specified conical section (20) )

7. The oil filter according to claim 6, characterized in that at least three protrusions (17) are contacted with the cover amplifier (3) at the upper end of the anti-drain valve (16).

8. The oil filter according to claim 1, characterized in that the upper part (15) of the inner annular element (10) in contact with the cover amplifier (3) is pointed.

9. The oil filter according to claim 1, characterized in that the upper end cap (7) is made of heat-resistant plastic.

10. The oil filter according to claim 9, characterized in that the heat-resistant plastic is a glass-filled polyamide.