CN220828557U - Valve core of pressure limiting valve - Google Patents
Valve core of pressure limiting valve Download PDFInfo
- Publication number
- CN220828557U CN220828557U CN202322298670.3U CN202322298670U CN220828557U CN 220828557 U CN220828557 U CN 220828557U CN 202322298670 U CN202322298670 U CN 202322298670U CN 220828557 U CN220828557 U CN 220828557U
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- Prior art keywords
- valve core
- pressure limiting
- pipe
- valve
- wall
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- 238000007789 sealing Methods 0.000 claims abstract description 49
- 238000005096 rolling process Methods 0.000 claims description 9
- 210000001503 joint Anatomy 0.000 claims description 7
- 239000003921 oil Substances 0.000 abstract description 14
- 239000010687 lubricating oil Substances 0.000 abstract description 9
- 238000000034 method Methods 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 3
- 230000000630 rising effect Effects 0.000 abstract description 3
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
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- Safety Valves (AREA)
Abstract
The utility model relates to the technical field of pressure limiting valves, in particular to a valve core of a pressure limiting valve, which comprises a valve body, wherein a pressure limiting pipe is arranged at one end of the valve body, a first connecting pipe and a second connecting pipe are respectively arranged on the circumferential outer wall of the pressure limiting pipe, a valve core body is arranged in the pressure limiting pipe, the valve core body is positioned right above the second connecting pipe, and a sleeve is arranged in the valve body. According to the utility model, when the valve core body resets after the pressure of lubricating oil is released, the sealing ring at the bottom of the valve core body is clamped in the first sealing groove arranged at the bottom of the pressure limiting pipe, so that the valve core body is ensured to still maintain a good sealing effect after pressure release for many times, the situation of oil leakage and the like is avoided, meanwhile, the roller arranged at the bottom of the valve core body slides in the sliding groove in the rising process of the valve core body, and the situation that the valve core body cannot stably rise and release pressure when the oil pressure is overlarge due to overlarge friction between the sealing gasket and the second sealing groove is avoided.
Description
Technical Field
The utility model relates to the technical field of pressure limiting valves, in particular to a valve core of a pressure limiting valve.
Background
Currently, in order to ensure the normal operation of an engine, some important friction pairs of the engine need to be pressure lubricated, such as pistons, main journals, connecting rod shaft diameters, superchargers and the like.
In order to ensure the safety and reliability of the engine lubrication system, the pressure of the lubrication system needs to be limited, and a pressure limiting valve is needed. The pressure limiting valve commonly used in the diesel engine mainly comprises an oil pump pressure limiting valve, a main oil duct pressure limiting valve, an auxiliary oil duct pressure limiting valve and the like, when the system pressure exceeds the opening pressure of the pressure limiting valve, a valve core of the pressure limiting valve moves upwards in a valve body, a plunger valve opens leakage flow, and the constant pressure of a lubricating system is ensured.
When the valve core of the pressure limiting valve works, the pressure limiting valve moves back and forth in the valve hole of the pressure limiting valve to achieve stability due to the action of lubricating oil pressure of the head part and elastic force of the tail part spring, so that the oil pressure of lubricating oil is controlled through the elastic force of the spring, and the inner wall abrasion caused by friction between the outer wall of the valve core and the inner wall of the valve hole is caused due to uneven stress of the valve core in the moving process, so that oil leakage caused by sealing failure between the valve core and the valve hole is finally caused, and finally, the flow and pressure of lubricating oil cannot be accurately controlled. Therefore, there is a need for a pressure limiting valve cartridge that solves the above-mentioned problems.
Disclosure of utility model
Based on the shortcomings in the prior art mentioned in the background art, the utility model provides a valve core of a pressure limiting valve.
The utility model adopts the following technical scheme to overcome the technical problems, and specifically comprises the following steps:
The valve core of the pressure limiting valve comprises a valve body, wherein a pressure limiting pipe is arranged at one end of the valve body, a first connecting pipe and a second connecting pipe are respectively arranged on the circumferential outer wall of the pressure limiting pipe, and a valve core body is arranged inside the pressure limiting pipe;
The valve core body is positioned right above the second connecting pipe;
The inside of valve body is provided with the sleeve pipe, sheathed tube inside is pegged graft there is the slide bar, the slide bar is located sheathed tube one end fixedly connected with slide, the slide with sleeve pipe sliding connection, the circumference outer wall of slide bar has cup jointed the spring.
As a further scheme of the utility model: the sliding rod is far away from one end fixedly connected with butt joint of slide, the circumference outer wall fixedly connected with screwed pipe of case body, the butt joint with screwed pipe threaded connection.
As still further aspects of the utility model: the inside of valve body has seted up the draw-in groove, the inside joint of draw-in groove has the fixed plate.
As still further aspects of the utility model: the top outer wall fixedly connected with of fixed plate rotates the seat, the inside rotation of rotating the seat is connected with the fixing screw, the fixing screw is kept away from the one end of rotating the seat extends to the outside of valve body.
As still further aspects of the utility model: the outer wall of the bottom of the valve core body is provided with a mounting groove, and a sealing ring is arranged in the mounting groove;
the bottom inner wall of the pressure limiting pipe is provided with a first sealing groove, and the sealing ring is matched with the first sealing groove.
As still further aspects of the utility model: rectangular grooves are formed in the inner walls of the bottoms of the pressure limiting pipes, and rolling assemblies and sealing assemblies are arranged in the rectangular grooves.
As still further aspects of the utility model: the sealing assembly comprises a second sealing groove which is formed in the inner wall of the bottom of the pressure limiting pipe, the second sealing groove is communicated with the rectangular groove, a sealing gasket is arranged in the second sealing groove, and the sealing gasket is fixedly connected to the outer circumferential wall of the valve core body.
As still further aspects of the utility model: the rolling assembly comprises a connecting rod fixedly connected with the outer wall of the bottom of the sealing gasket, connecting seats are fixedly connected to the outer walls of the two sides of the connecting rod, rollers are rotatably connected to the inner walls of the two sides of the connecting seats, sliding grooves are formed in the inner walls of the two sides of the rectangular groove, and the rollers are in rolling connection with the sliding grooves.
After adopting the structure, compared with the prior art, the utility model has the following advantages:
1. According to the utility model, through the arrangement of the fixing screw, the sleeve, the spring, the sliding rod and the valve core body, when the oil pressure of lubricating oil in the second connecting pipe is gradually increased, upward pressure is applied to the valve core body to jack the valve core body, at the moment, the spring positioned in the valve body is in a compressed state, when the valve core body jacks up, lubricating oil in the second connecting pipe can diffuse into the pressure limiting pipe and is discharged from the first connecting pipe, and when the pressure in the second connecting pipe is restored to a rated value, the compressed spring can immediately restore deformation and apply downward pressure to the valve core body so as to restore the valve core body to finish sealing of the second connecting pipe.
2. According to the utility model, the valve core body, the sealing assembly and the rolling assembly are arranged, when the valve core body resets after the pressure of lubricating oil is released, the sealing ring at the bottom of the valve core body is clamped in the first sealing groove arranged at the bottom of the pressure limiting pipe, so that the valve core body can still keep a good sealing effect after pressure is released for many times, the conditions of oil leakage and the like are avoided, meanwhile, the roller arranged at the bottom of the valve core body can slide in the sliding groove in the rising process of the valve core body, and the condition that the valve core body cannot stably rise and release the pressure when the oil pressure is overlarge due to overlarge friction between the sealing gasket and the second sealing groove is avoided.
Drawings
Fig. 1 is a schematic overall perspective view of the present utility model.
Fig. 2 is a schematic overall sectional structure of the present utility model.
Fig. 3 is an enlarged schematic view of the structure of fig. 2a according to the present utility model.
Fig. 4 is a schematic view of the valve core body structure of the present utility model.
Fig. 5 is an enlarged schematic view of the structure of fig. 4B according to the present utility model.
In the figure: 1. a valve body; 2. a fixed screw; 3. a first connection pipe; 4. a second connection pipe; 5. a pressure limiting tube; 6. a fixing plate; 7. a rotating seat; 8. a clamping groove; 9. a sleeve; 10. a slide bar; 11. a slide plate; 12. a spring; 13. butt joint; 14. a valve core body; 15. a first seal groove; 16. a sealing gasket; 17. a second seal groove; 18. rectangular grooves; 19. a chute; 20. a connecting rod; 21. a roller; 22. a connecting seat; 23. a threaded tube; 24. a mounting groove; 25. and (3) sealing rings.
Detailed Description
The technical scheme of the patent is further described in detail below with reference to the specific embodiments.
Embodiments of the present patent are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present patent and are not to be construed as limiting the present patent.
Referring to fig. 1 to 5, in an embodiment of the present utility model, a pressure limiting valve core includes a valve body 1, one end of the valve body 1 is provided with a pressure limiting pipe 5, a first connecting pipe 3 and a second connecting pipe 4 are respectively disposed on a circumferential outer wall of the pressure limiting pipe 5, and a valve core body 14 is disposed inside the pressure limiting pipe 5;
the valve core body 14 is positioned right above the second connecting pipe 4;
The inside of valve body 1 is provided with sleeve pipe 9, and the inside grafting of sleeve pipe 9 has slide bar 10, and slide bar 10 is located the one end fixedly connected with slide 11 of sleeve pipe 9, slide 11 and sleeve pipe 9 sliding connection, and the circumference outer wall of slide bar 10 has cup jointed spring 12.
Preferably, one end of the sliding rod 10 far away from the sliding plate 11 is fixedly connected with a butt joint 13, the circumferential outer wall of the valve core body 14 is fixedly connected with a threaded pipe 23, and the butt joint 13 is in threaded connection with the threaded pipe 23.
Preferably, draw-in groove 8 has been seted up to the inside of valve body 1, and the inside joint of draw-in groove 8 has fixed plate 6, has guaranteed that the condition such as displacement can not appear after the fixed plate 6 is installed.
Preferably, the top outer wall fixedly connected with of fixed plate 6 rotates seat 7, rotates the inside rotation of seat 7 and is connected with fixing screw rod 2, and fixing screw rod 2 keeps away from the one end of rotating seat 7 and extends to the outside of valve body 1, can realize the locking fixed to fixed plate 6 through fixing screw rod 2.
Preferably, the outer wall of the bottom of the valve core body 14 is provided with a mounting groove 24, and a sealing ring 25 is arranged in the mounting groove 24;
The first seal groove 15 is arranged on the inner wall of the bottom of the pressure limiting pipe 5, the seal ring 25 is matched with the first seal groove 15, when the pressure in the second connecting pipe 4 is restored to the rated value, the compressed spring 12 can immediately restore to deform and apply downward pressure to the valve core body 14 so as to restore the valve core body to complete the sealing of the second connecting pipe 4.
Preferably, the bottom inner wall of the pressure limiting pipe 5 is provided with a rectangular groove 18, and a rolling assembly and a sealing assembly are arranged in the rectangular groove 18.
Preferably, the seal assembly comprises a second seal groove 17 formed in the inner wall of the bottom of the pressure limiting pipe 5, the second seal groove 17 is communicated with a rectangular groove 18, a seal gasket 16 is arranged in the second seal groove 17, the seal gasket 16 is fixedly connected to the outer circumferential wall of the valve core body 14, and through the mutual matching of the seal gasket 16 and the second seal groove 17, the secondary sealing of the valve core body 14 can be realized, and the sealing performance of the valve core body 14 is further ensured.
Preferably, the rolling assembly includes the connecting rod 20 of fixed connection in sealed 16 bottom outer wall, the equal fixedly connected with connecting seat 22 of both sides outer wall of connecting rod 20, the equal rotation of both sides inner wall of connecting seat 22 is connected with gyro wheel 21, spout 19 has all been seted up to the both sides inner wall of rectangular channel 18, gyro wheel 21 and spout 19 roll connection, the gyro wheel 21 that sets up in its bottom at the in-process that valve core body 14 risees can slide in spout 19 inside, avoid sealed 16 and the too big circumstances emergence that can not stably rise the pressure release of case body 14 when leading to the oil pressure too big of frictional force between the second seal groove 17.
Working principle: when the pressure limiting valve works, when the oil pressure of lubricating oil in the second connecting pipe 4 is gradually increased, upward pressure is applied to the valve core body 14 to jack the valve core body, at the moment, the spring 12 positioned in the valve body 1 is in a compressed state, when the valve core body 14 is jacked up upwards, lubricating oil in the second connecting pipe 4 can diffuse into the pressure limiting pipe 5 and is discharged from the first connecting pipe 3, when the pressure in the second connecting pipe 4 is restored to a rated value, the compressed spring 12 can immediately restore deformation and apply downward pressure to the valve core body 14 so as to reset the valve core body 14, sealing rings 25 positioned at the bottom of the valve core body 14 can be clamped in the first sealing groove 15 arranged at the bottom of the pressure limiting pipe 5, so that the valve core body 14 can still keep good sealing effect after pressure relief for many times, the situation of oil leakage and the like can not occur, and meanwhile, the roller 21 arranged at the bottom of the valve core body 14 can slide in the chute 19 in the process of rising, and the situation that the valve core body 14 cannot be stably lifted when the oil pressure is excessively large due to the excessive friction force between the sealing gasket 16 and the second sealing groove 17 is avoided.
It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof.
Claims (8)
1. The valve core of the pressure limiting valve comprises a valve body (1) and is characterized in that a pressure limiting pipe (5) is arranged at one end of the valve body (1), a first connecting pipe (3) and a second connecting pipe (4) are respectively arranged on the circumferential outer wall of the pressure limiting pipe (5), and a valve core body (14) is arranged in the pressure limiting pipe (5);
The valve core body (14) is positioned right above the second connecting pipe (4);
The inside of valve body (1) is provided with sleeve pipe (9), the inside grafting of sleeve pipe (9) has slide bar (10), slide bar (10) are located one end fixedly connected with slide plate (11) of sleeve pipe (9), slide plate (11) with sleeve pipe (9) sliding connection, spring (12) have been cup jointed to the circumference outer wall of slide bar (10).
2. The pressure limiting valve core according to claim 1, characterized in that one end of the sliding rod (10) far away from the sliding plate (11) is fixedly connected with a butt joint (13), the circumferential outer wall of the valve core body (14) is fixedly connected with a threaded pipe (23), and the butt joint (13) is in threaded connection with the threaded pipe (23).
3. The pressure limiting valve core according to claim 2, characterized in that a clamping groove (8) is formed in the valve body (1), and a fixing plate (6) is clamped in the clamping groove (8).
4. A pressure limiting valve core according to claim 3, characterized in that the top outer wall of the fixed plate (6) is fixedly connected with a rotating seat (7), the inside of the rotating seat (7) is rotationally connected with a fixing screw (2), and one end of the fixing screw (2) far away from the rotating seat (7) extends to the outside of the valve body (1).
5. The pressure limiting valve core according to claim 4, characterized in that a mounting groove (24) is formed in the outer wall of the bottom of the valve core body (14), and a sealing ring (25) is arranged in the mounting groove (24);
The bottom inner wall of the pressure limiting pipe (5) is provided with a first sealing groove (15), and the sealing ring (25) is matched with the first sealing groove (15).
6. The pressure limiting valve core according to claim 5, wherein a rectangular groove (18) is formed in the inner wall of the bottom of the pressure limiting pipe (5), and a rolling assembly and a sealing assembly are arranged in the rectangular groove (18).
7. The pressure limiting valve spool according to claim 6, characterized in that the sealing assembly comprises a second sealing groove (17) formed in the inner wall of the bottom of the pressure limiting pipe (5), the second sealing groove (17) is communicated with the rectangular groove (18), a sealing gasket (16) is arranged in the second sealing groove (17), and the sealing gasket (16) is fixedly connected to the outer circumferential wall of the spool body (14).
8. The pressure limiting valve core according to claim 7, wherein the rolling assembly comprises a connecting rod (20) fixedly connected to the outer wall of the bottom of the sealing gasket (16), connecting seats (22) are fixedly connected to the outer walls of the two sides of the connecting rod (20), rollers (21) are rotatably connected to the inner walls of the two sides of the connecting seats (22), sliding grooves (19) are formed in the inner walls of the two sides of the rectangular groove (18), and the rollers (21) are in rolling connection with the sliding grooves (19).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322298670.3U CN220828557U (en) | 2023-08-25 | 2023-08-25 | Valve core of pressure limiting valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322298670.3U CN220828557U (en) | 2023-08-25 | 2023-08-25 | Valve core of pressure limiting valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220828557U true CN220828557U (en) | 2024-04-23 |
Family
ID=90723665
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322298670.3U Active CN220828557U (en) | 2023-08-25 | 2023-08-25 | Valve core of pressure limiting valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220828557U (en) |
-
2023
- 2023-08-25 CN CN202322298670.3U patent/CN220828557U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant |