CN219034870U

CN219034870U - Oil filter assembly with bypass valve

Info

Publication number: CN219034870U
Application number: CN202222826664.6U
Authority: CN
Inventors: 李征乾; 周林阳; 陈彬; 徐连奎; 李运禄; 王文涛; 张继尧; 韩昊; 王段林; 秦帅波
Original assignee: Xinxiang Aviation Industry Group Co Ltd
Current assignee: Xinxiang Aviation Industry Group Co Ltd
Priority date: 2022-10-26
Filing date: 2022-10-26
Publication date: 2023-05-16
Anticipated expiration: 2032-10-26

Abstract

The utility model belongs to the field of design of lubricating oil systems of aeroengines, and particularly relates to an oil filter assembly with a bypass valve. The traditional bypass valve assembly has a plurality of components, is unfavorable for weight reduction and has large installation space. The utility model relates to an oil filter assembly with a bypass valve, which comprises a filter element, an outer pipeline and an inner pipeline, wherein the outer pipeline enters the filter element, the inner pipeline flows out of the filter element, the outer pipeline surrounds the inner pipeline, the oil filter assembly is provided with the bypass valve between an outlet position of the filter element and the inner pipeline, the bypass valve consists of a valve shell, a disc spring and a valve end cover, the valve shell is combined with the valve end cover to clamp the disc spring and seal the disc spring at the clamping position, and the part, close to the edge, of the disc spring is immersed in the outer pipeline; when the filter element is blocked, the belleville springs deform under the action of oil pressure, so that the outer pipeline and the inner pipeline are communicated. The space utilization rate of the product is improved, the weight of the product is reduced, the product is not easy to block, and the pollution resistance level is higher than that of the traditional bypass valve.

Description

Oil filter assembly with bypass valve

Technical Field

The utility model belongs to the field of design of lubricating oil systems of aeroengines, and particularly relates to an oil filter assembly with a bypass valve.

Background

In the lubricating oil system, a bypass valve assembly is integrated on the oil filter, and when the oil filter is blocked or has larger flow resistance, the pressure is required to be unloaded through the bypass valve assembly, so that pipelines and other accessories are prevented from being damaged due to overhigh pressure, and the safety of the lubricating oil system is ensured.

The traditional bypass valve assembly consists of a valve shell, a steel ball, a spring, a valve end cover and a steel wire retainer ring, so that a plurality of parts are formed, the weight reduction is not facilitated, the installation space integrated together is large, and the product space utilization rate is reduced.

Disclosure of Invention

The purpose of the utility model is that: an oil filter assembly with a bypass valve is provided to reduce the occupation space of an oil filter and to reduce the weight of the oil filter assembly.

An oil filter assembly with a bypass valve, the oil filter assembly comprises a filter element, an outer pipeline which enters the filter element and an inner pipeline which flows out of the filter element, the outer pipeline surrounds the inner pipeline, the oil filter assembly is provided with the bypass valve between the outlet position of the filter element and the inner pipeline, the bypass valve consists of a valve shell, a disc spring and a valve end cover, the valve shell is combined with the valve end cover to clamp the disc spring and seal the disc spring at the clamping position, and the part of the disc spring close to the edge is immersed in the outer pipeline; when the filter element is blocked, the belleville springs deform under the action of oil pressure, so that the outer pipeline and the inner pipeline are communicated through radial holes in the valve shell.

Advantageously, the valve housing has an annular structure with an annular boss in a central region, a connecting screw thread combined with the valve end cover is arranged at the upper part of the annular boss, an external screw thread of the valve housing connected with the inner pipeline is arranged at the lower part of the annular boss, and the disc spring is arranged on the annular boss.

Advantageously, the lower part of the shutter housing also has a shutter housing inner tooth surface for auxiliary mounting.

Advantageously, an oil filter seal is also provided between the upper part of the valve housing and the filter insert.

Advantageously, the flap end cap has a conical surface at the lower end, which provides a deformation gap for the belleville springs.

Advantageously, a limit groove is also provided at the edge of the conical surface, which engages the outer edge of the disk spring.

Advantageously, the flap end cap also has an end cap aperture for auxiliary installation.

The method has the following beneficial effects: under the prerequisite of realizing original function, replace steel ball, spring and steel wire retaining ring with belleville spring, can realize original function, improve product space utilization, alleviate product weight, belleville spring annular week is the import moreover, is difficult for blockking up, and dirt resistance level is higher than traditional bypass valve.

Drawings

FIG. 1 is a schematic diagram of an oil circuit during normal operation of an oil filter;

FIG. 2 is a schematic view of an oil circuit when a filter element is blocked;

FIG. 3 is a schematic view of the bypass valve.

1-filter element, 2-valve shell, 3-belleville spring, 4-valve end cover, 5-end cover hole, 6-connecting screw thread, 7-valve shell inner tooth surface, 8-valve shell outer screw thread, 9-oil filter sealing ring and 10-pipeline shell

Detailed Description

The utility model is further described below with reference to the drawings and examples.

As shown in fig. 1, the bypass valve in the oil filter assembly of the present utility model is mainly composed of a valve housing 2, a belleville spring 3 and a valve end cover 4. The valve housing 2 has an external thread at the bottom for connecting the inner pipe 11. The valve housing 2 also has a valve housing inner tooth surface 7 at the bottom, which secures the valve housing 2 when it is assembled with the valve end cap 4. The middle part of the valve shell 2 is provided with an annular boss for limiting the disc spring 3 and forming a seal (isolating the outer pipeline 10 from the inner pipeline 11). The valve housing 2 has an external thread in the upper region of the annular boss, which is used for the threaded connection with the valve end cap 4 and provides a preload for the disc spring 3. The bottom of the valve end cover 4 is provided with a conical surface which provides a deformation clearance for the disc spring 3. The top of the valve end cap 4 is provided with an end cap hole 5 for facilitating the assembly with the valve end cap 4.

The valve shell 2 and the valve end cover 3 are connected through threads 6, and the disc spring 3 has a certain compression amount; the filter cartridge 1 of the oil filter assembly is mounted on the valve housing 2 of the bypass valve assembly. As shown in fig. 2, when the filter element 1 is not blocked, oil flows through the oil filter element 1 by the outer pipe 10, and flows out of the circular hole in the middle of the belleville spring after being filtered. At this time, the disc spring 3 is compressed by the shutter housing 2 and the shutter end cover 4, so that oil does not flow from the position where the edge of the disc spring 3 is bonded to the shutter end cover 4.

As shown in fig. 3, when the oil filter element 1 is clogged, oil cannot normally flow in from the oil filter element 1. When the pressure reaches a certain value, the disc spring 3 in the bypass valve assembly is stressed to deform under the action of the hydraulic pressure of oil, and the oil flows out from a gap between the edge of the disc spring 3 and the valve end cover 4 and flows into the inner pipeline 11 through the radial hole 12 of the valve shell 2 to perform bypass pressure relief.

The main innovation point of the utility model is that the steel ball, the spring and the steel wire retainer ring are replaced by the disc spring through ingenious mechanical structure design. The oil filter and the bypass valve of the traditional structure adopt a split type structure, and besides more installation space, two oil ways are required to be arranged. The bypass valve assembly saves installation space and can realize the function of the traditional structure by only one oil way. This is helpful for the form design, weight design and thus function design of the matched product.

Claims

1. An oil filter assembly with bypass valve, comprising a filter element (1), and an outer pipe (10) entering the filter element (1) and an inner pipe (11) exiting the filter element (1), the outer pipe (10) surrounding the inner pipe (11), characterized in that: the oil filter assembly is provided with a bypass valve between the outlet position of the filter element (1) and the inner pipeline (11), the bypass valve consists of a valve shell (2), a disc spring (3) and a valve end cover (4), the disc spring (3) is clamped after the valve shell (2) is combined with the valve end cover (4) and is sealed at the clamping position, and the part, close to the edge, of the disc spring (3) is immersed in the outer pipeline (10); when the filter element (1) is blocked, the belleville springs (3) deform under the action of oil pressure, so that the outer pipeline (10) and the inner pipeline (11) are communicated through radial holes (12) in the valve shell (2).

2. An oil filter assembly according to claim 1, wherein: the valve shell (2) is of an annular structure with an annular boss in the middle area, a connecting thread (6) combined with the valve end cover (4) is arranged at the upper part of the annular boss, an external thread (8) of the valve shell connected with the inner pipeline (11) is arranged at the lower part of the annular boss, and the belleville spring (3) is arranged on the annular boss.

3. An oil filter assembly according to claim 2, wherein: the lower part of the valve housing (2) is also provided with a valve housing inner tooth surface (7) for auxiliary installation.

4. An oil filter assembly according to claim 3, wherein: an oil filter sealing ring (9) is arranged between the upper part of the valve shell (2) and the filter element (1).

5. An oil filter assembly according to claim 1, wherein: the flap end cap (4) has a conical surface at the lower end, which provides a deformation gap for the disk spring (3).

6. An oil filter assembly as set forth in claim 5 wherein: the edge of the conical surface is also provided with a limit groove for clamping the outer edge of the disc spring (3).

7. An oil filter assembly as defined in claim 6, wherein: the valve end cover (4) is also provided with an end cover hole (5) for auxiliary installation.