CN218780395U

CN218780395U - Self-balancing pressure limiting valve core

Info

Publication number: CN218780395U
Application number: CN202223294211.XU
Authority: CN
Inventors: 雷元; 陈连山; 蒲屹; 段胜秋; 胡文强
Original assignee: Sichuan Aerospace Shiyuan Technology Co ltd
Current assignee: Sichuan Aerospace Shiyuan Technology Co ltd
Priority date: 2022-12-09
Filing date: 2022-12-09
Publication date: 2023-03-31
Anticipated expiration: 2032-12-09

Abstract

The utility model discloses a self-balancing pressure limiting valve case, including the case, the afterbody and the spring fit of case are provided with the inlet port that does not run through on the head of case, are provided with a plurality of bleeder ports that run through on the bottom lateral wall of inlet port, are provided with annular oil groove on the outer wall of case, and the output setting of bleeder port is provided with annular compensating groove in going out the oil groove on the outer wall of case, and the compensating groove setting is between the tip of inlet port and oil groove. The valve core is located the valve opening of pressure limiting valve, and the spring mounting face of valve core is located the inside position that is close to the center of valve core, and the draining hole equipartition is on going out the oil groove, and the case atress is balanced when the draining can be realized to the draining of equipartition draining hole, reaches the effect of case self-balancing. A balance groove with smaller width is arranged between the oil outlet groove and the opening part of the oil inlet hole, on one hand, the balance groove can improve the differential pressure effect of a high-pressure area at the head part of the valve core, on the other hand, the effect of oil storage lubrication can be achieved, and further, the self-balancing of the valve core is facilitated.

Description

Self-balancing pressure limiting valve core

Technical Field

The utility model relates to a case technical field, in particular to self-balancing pressure limiting valve case.

Background

The oil pump is a key part of an engine lubricating system, is usually installed inside an engine oil pan and provides lubricating oil for circulation of all parts inside the engine. The flow and pressure of the lubricating oil have very important influence on the lubricating effect, a pressure limiting valve on an oil pump is a key structure for controlling the pressure of the lubricating oil, a valve core of the pressure limiting valve is acted by the pressure of the lubricating oil at the head part and the elastic force of a spring at the tail part when working, and moves back and forth in a valve hole of the pressure limiting valve to achieve stability, so that the oil pressure of the lubricating oil is controlled by the elastic force of the spring, the inner wall abrasion is caused by friction between the outer wall of the valve core and the inner wall of the valve hole due to uneven stress of the valve core in the moving process, meanwhile, friction is generated between the oil outlet channel and the outer wall of the valve core due to the fact that the end part of the valve core moves to the other side of the oil outlet channel in the oil drainage process, oil leakage is finally caused due to the fact that the valve core and the valve hole cannot be sealed, and finally the flow and pressure of the lubricating oil cannot be accurately controlled. The conventional valve cartridge is shown in fig. 1 before being opened, and in fig. 2 after being opened.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art's not enough, provide a self-balancing pressure limiting valve case.

The purpose of the utility model is realized through the following technical scheme:

the valve element of the self-balancing pressure limiting valve comprises a valve element, wherein the tail part of the valve element is matched with a spring, an oil inlet hole which is not penetrated is formed in the end face of the head part of the valve element, a plurality of penetrating oil drainage holes are formed in the side wall of the bottom of the oil inlet hole, an annular oil outlet groove is formed in the outer wall of the valve element, the output end of each oil drainage hole is arranged in the oil outlet groove, an annular balance groove is formed in the outer wall of the valve element, and the balance groove is formed in the end part of the oil inlet hole and between the oil outlet grooves.

Furthermore, an installation hole which does not penetrate through is formed in the end face of the tail part of the valve core, the bottom of the installation hole is arranged in the middle of the valve core, and the end part of the spring is arranged in the installation hole.

Furthermore, at least two identical oil drainage holes are uniformly formed in the side wall of the bottom of each oil drainage hole.

Furthermore, four identical oil drainage holes are uniformly formed in the side wall of the bottom of each oil drainage hole.

Further, the cross section of the valve core is circular.

Further, the oil drainage hole is a circular hole, and the diameter of the oil drainage hole is not larger than the width of the oil outlet groove.

Furthermore, chamfers are arranged between the end parts of the two ends of the valve core and the outer wall of the valve core.

Furthermore, the valve core is arranged in the valve body in a sliding mode, the oil inlet hole is matched with the oil inlet channel on the valve body, and the oil drainage hole is matched with the oil outlet channel on the valve body.

The utility model has the advantages that:

1) In the technical scheme, the valve core is positioned in a valve hole of the pressure limiting valve, the spring mounting surface of the valve core is positioned in the position close to the center inside the valve core, the oil drainage holes are uniformly distributed on the oil outlet groove, and the uniformly distributed oil drainage holes can realize balanced stress of the valve core during oil drainage, so that the self-balancing effect of the valve core is achieved. A balance groove with smaller width is arranged between the oil outlet groove and the opening part of the oil inlet hole, on one hand, the balance groove can improve the differential pressure effect of a high-pressure area at the head part of the valve core, on the other hand, the effect of oil storage and lubrication can be achieved, and further, the self-balancing of the valve core is facilitated.

2) In the technical scheme, the bottom of the mounting hole is positioned at the central position of the valve core, so that the head and the tail of the valve core are supported by the hole wall when the valve core moves, and the stable movement and the self-balancing of the valve core are facilitated.

Drawings

FIG. 1 is a schematic structural view of a conventional valve cartridge in a valve body before opening;

FIG. 2 is a schematic structural view of a conventional valve element in a valve body after the valve element is opened;

FIG. 3 is a perspective view of the valve cartridge;

FIG. 4 is a front view structural view of the valve core;

FIG. 5 is an internal structural view of the valve body;

FIG. 6 is a schematic structural view of the valve cartridge in the valve body before opening;

FIG. 7 is a schematic structural view of the valve cartridge in the valve body after opening;

in the figure, 1-valve core, 2-oil inlet hole, 3-oil drain hole, 4-oil outlet groove, 5-balance groove, 6-mounting hole, 7-chamfer, 8-valve body, 9-oil inlet channel and 10-oil outlet channel.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 3-7, the present invention provides a technical solution:

the utility model provides a self-balancing pressure-limiting valve case, includes case 1, case 1's afterbody and spring fit, be provided with the inlet port 2 that does not run through on case 1's the head terminal surface, be provided with a plurality of bleeder vents 3 that run through on the bottom lateral wall of inlet port 2, be provided with annular oil groove 4 on case 1's the outer wall, the output setting of bleeder vent 3 is in oil groove 4, be provided with annular balancing tank 5 on case 1's the outer wall, balancing tank 5 sets up between the tip of inlet port 2 and oil groove 4. At least two same oil drainage holes 3 are uniformly arranged on the side wall of the bottom of the oil drainage hole 3. Four same oil drainage holes 3 are uniformly arranged on the side wall of the bottom of the oil drainage hole 3. The section of the valve core 1 is circular. The valve core 1 is arranged in the valve body 8 in a sliding mode, the oil inlet hole 2 is matched with the oil inlet channel 9 on the valve body 8, and the oil drainage hole 3 is matched with the oil outlet channel 10 on the valve body 8. The oil drainage hole 3 is a circular hole, and the diameter of the oil drainage hole 3 is not more than the width of the oil outlet groove 4. And chamfers 7 are arranged between the end parts of the two ends of the valve core 1 and the outer wall of the valve core 1. The valve body 8 is a valve body of the pressure limiting valve, the valve core 1 is positioned in a valve hole of the pressure limiting valve, the oil drainage holes 3 are uniformly distributed on the oil outlet groove 4, and the uniformly distributed oil drainage holes 3 can realize the stress balance of the valve core 1 during oil drainage, so that the self-balancing effect of the valve core is achieved. A balance groove 5 with smaller width is arranged between the oil outlet groove 4 and the opening part of the oil inlet hole 2, on one hand, the balance groove 5 can improve the pressure difference effect of a high-pressure area at the head part of the valve core 1, on the other hand, the effect of oil storage and lubrication can be achieved, and further, the self-balancing of the valve core is facilitated. The chamfer 7 is arranged to facilitate the movement of the valve core 1, and the situation that the edge of the end part is scratched when the valve core 1 moves is prevented. Oil inlet 2 and mounting hole 6 all belong to circular port and coaxial setting, do not communicate between oil inlet 2 and the mounting hole 6.

In some embodiments, the tail end surface of the valve core 1 is provided with a mounting hole 6 which does not penetrate through, the bottom of the mounting hole 6 is arranged in the middle of the valve core 1, and the end of the spring is arranged in the mounting hole 6. The spring mounting surface in the valve core 1 is positioned in the position close to the center in the valve core, so that the friction between the outer wall of the valve core 1 and the valve body 8 due to the deviation of the spring caused by acting force is prevented. The bottom of the mounting hole is positioned at the central position of the valve core, so that the head and the tail of the valve core are supported by hole walls when the valve core moves, and the stable movement and self-balancing of the valve core are facilitated.

The foregoing is illustrative of the preferred embodiments of the present invention, and it is to be understood that the invention is not limited to the precise forms disclosed herein and that the invention is not to be considered as limited to the disclosed embodiments, but is capable of use in various other combinations, modifications, and environments and is capable of changes within the scope of the inventive concept as expressed herein, commensurate with the above teachings, or the skill or knowledge of the relevant art. But that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention, which is to be limited only by the claims appended hereto.

Claims

1. A self-balancing pressure limiting valve spool is characterized in that: including case (1), the afterbody and the spring fit of case (1), be provided with oil inlet (2) that do not run through on the head terminal surface of case (1), be provided with a plurality of bleeder (3) that run through on the bottom lateral wall of oil inlet (2), be provided with annular oil groove (4) on the outer wall of case (1), the output setting of bleeder (3) is in go out in oil groove (4), be provided with annular compensating groove (5) on the outer wall of case (1), compensating groove (5) set up the tip of oil inlet (2) with go out between oil groove (4).

2. The valve core of the self-balancing pressure limiting valve according to claim 1, wherein: the end face of the tail part of the valve core (1) is provided with a mounting hole (6) which does not penetrate through, the bottom of the mounting hole (6) is arranged in the middle of the valve core (1), and the end part of the spring is arranged in the mounting hole (6).

3. The self-balancing pressure-limiting valve spool according to claim 1 or 2, wherein: the bottom side wall of the oil drainage hole (3) is uniformly provided with at least two same oil drainage holes (3).

4. The valve core of self-balancing pressure limiting valve according to claim 3, characterized in that: the bottom side wall of the oil drainage hole (3) is uniformly provided with four identical oil drainage holes (3).

5. The valve core of self-balancing pressure limiting valve according to claim 1 or 2, characterized in that: the section of the valve core (1) is circular.

6. The self-balancing pressure-limiting valve spool according to claim 1 or 2, wherein: the oil drainage hole (3) is a circular hole, and the diameter of the oil drainage hole (3) is not larger than the width of the oil outlet groove (4).

7. The self-balancing pressure-limiting valve spool according to claim 1 or 2, wherein: chamfers (7) are arranged between the end parts of the two ends of the valve core (1) and the outer wall of the valve core (1).

8. The valve core of self-balancing pressure limiting valve according to claim 1 or 2, characterized in that: the valve core (1) is arranged in the valve body (8) in a sliding mode, the oil inlet hole (2) is matched with an oil inlet channel (9) in the valve body (8), and the oil drainage hole (3) is matched with an oil outlet channel (10) in the valve body (8).