CN109209854B - Plunger sealing element of high-pressure constant-flow pump - Google Patents
Plunger sealing element of high-pressure constant-flow pump Download PDFInfo
- Publication number
- CN109209854B CN109209854B CN201811144309.2A CN201811144309A CN109209854B CN 109209854 B CN109209854 B CN 109209854B CN 201811144309 A CN201811144309 A CN 201811144309A CN 109209854 B CN109209854 B CN 109209854B
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- plunger
- pump
- sealing
- cleaning
- cavity
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/14—Pistons, piston-rods or piston-rod connections
- F04B53/143—Sealing provided on the piston
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Details Of Reciprocating Pumps (AREA)
Abstract
The invention provides a plunger sealing element of a high-pressure constant-current pump, which comprises a pump main body and a pump head fixedly connected with the pump main body, wherein a pump chamber, a pump inlet hole and a pump outlet hole communicated with the pump chamber are arranged in the pump head, a plunger sliding in the pump chamber is arranged in the pump main body, the plunger sealing element comprises a sealing ring fixed on the plunger, the sealing ring is sleeved on the plunger, the sealing ring is generally in a circular truncated cone shape, the diameter of one end, close to the pump chamber, of the sealing ring is smaller than that of the other end of the sealing ring, the sealing ring comprises an integrally formed sliding section and a matching sealing section, the sliding section is in a columnar shape, the matching sealing section is in a circular truncated cone shape, a sealing cavity for accommodating the matching sealing section is arranged in the pump head, the. The invention reduces the friction force between the plunger and the sealing element, prolongs the service life of the plunger and does not influence the sealing effect.
Description
Technical Field
The invention relates to the technical field of high-pressure infusion pumps, in particular to a plunger sealing element of a high-pressure constant-flow pump.
Background
The plunger assembly and the sealing ring in the high-pressure constant flow pump are arranged on the pump head, respectively play a role in conveying liquid and sealing a high-pressure mobile phase in the pump cavity, and are one of the core components of the high-pressure constant flow pump. The existing sealing structure adopts a compression type packing seal, the structure of the sealing structure is sealed by pressing packing to enable the sealing structure to be in close contact with the surface of a plunger and the inner surface of a box body, the plunger and the sealing structure move relatively to each other to generate larger friction force, the sealing structure is an important wearing part of a high-pressure constant flow pump, and meanwhile, the plunger also receives larger friction force, so that the plunger is abraded after a long time, the coaxiality of the plunger can be influenced, and the service life of the plunger can be influenced.
Disclosure of Invention
In order to solve the technical problems, the invention provides the plunger sealing element of the high-pressure constant-flow pump, which reduces the friction force between the plunger and the sealing element, prolongs the service life of the plunger and does not influence the sealing effect.
The invention adopts the following technical scheme:
a plunger sealing element of a high-pressure constant-flow pump comprises a pump main body and a pump head fixedly connected with the pump main body, a pump chamber, a pump inlet hole and a pump outlet hole which are communicated with the pump chamber are arranged in the pump head, a plunger piston which slides in the pump chamber is arranged in the pump main body, the plunger sealing element comprises a sealing ring fixed on the plunger, the sealing ring is sleeved on the plunger, the sealing ring is generally in a circular truncated cone shape, the diameter of one end of the sealing ring close to the pump chamber is smaller than that of the other end of the sealing ring, the sealing ring comprises an integrally formed sliding section and a matched sealing section, the sliding section is columnar, the matching sealing section is in a circular truncated cone shape, a sealing cavity for accommodating the matching sealing section is arranged in the pump head, the matched sealing section can slide in the sealing cavity, and a conical surface matched with the matched sealing section is arranged at the inner bottom of the sealing cavity.
Preferably, a guide post is coaxially arranged in the middle of the sealing cavity, a through hole for the plunger to pass through is coaxially arranged in the guide post, the through hole is communicated with the pump chamber, a sliding cavity for accommodating the guide post is arranged at the end part of the matching sealing section, and the matching sealing section slides on the guide post through the sliding cavity.
Preferably, the guide post comprises a plurality of guide blocks extending along the axial direction of the plunger, the guide blocks are uniformly distributed along the circumferential direction of the plunger, a gap is reserved between every two adjacent guide blocks, a sliding block corresponding to the gap is arranged in the sliding cavity, and the sliding block extends along the axial direction of the plunger.
Preferably, the slider is integrally formed with the seal ring.
Preferably, still be equipped with in the pump head with the purge chamber of pump chamber intercommunication and with the washing entry and the washing export of purge chamber intercommunication, be equipped with the washing piece in the purge chamber, follow on the washing piece the axial of plunger is equipped with the washing chamber, the washing piece passes through wash the chamber cover and locate on the plunger, be equipped with on the washing piece with wash the feed liquor hole and the play liquid hole of chamber intercommunication, the feed liquor hole with wash the entry intercommunication, go out the liquid hole with wash the export intercommunication, be equipped with on the washing piece and hold the cavity of sliding section, the cavity with distance between the sealed chamber is greater than the thickness of sealing ring, the sliding section slide in the cavity, the interior bottom of cavity be equipped with sliding section complex sealing end face.
Preferably, still be equipped with the washing runner in the washing piece, it includes entry runner and export runner to wash the runner, entry runner's one end with feed liquor hole intercommunication, entry runner's the other end with the cavity intercommunication, export runner's one end with the cavity intercommunication, entry runner's the other end with go out liquid hole intercommunication.
Preferably, wash the entry with wash the export symmetry set up in radial both sides of plunger on the pump head, the feed liquor hole with go out liquid hole symmetry set up in radial both sides of plunger wash on the piece, the entry runner with the export runner symmetry set up in the both sides of plunger.
Preferably, the openings of the inlet channel and the outlet channel on the sealing end surface are circular, the sealing ring is further provided with a lug which is matched with the inlet channel and the outlet channel respectively, and the lug is in a circular truncated cone shape.
The invention has the beneficial effects that: according to the invention, the sealing element is fixed on the plunger, the sealing element and the plunger move synchronously, so that the friction force between the plunger and the sealing element is reduced, the service life of the plunger is prolonged, and the whole sealing effect is not influenced by matching the sealing section with the sealing cavity in the moving process.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic structural view of the mating seal segment of FIG. 1 in sealing engagement with the seal cavity;
FIG. 3 is a schematic view of the sliding section of FIG. 1 in sealing engagement with the sealing end face;
FIG. 4 is a schematic diagram of a pump head according to the present invention;
FIG. 5 is a schematic view of the seal ring of the present invention;
FIG. 6 is a schematic view of a bump on a sealing ring according to the present invention;
fig. 7 is a schematic structural view of the guide post in the sealing cavity of the present invention.
Labeled as: 1. a pump body; 2. a pump head; 3. a pump chamber; 4. a pump-in hole; 5. a pump-out bore; 6. a plunger; 7. a seal ring; 8. a sliding section; 9. a mating seal section; 10. sealing the cavity; 11. a guide post; 12. a sliding cavity; 13. a guide block; 14. a slider; 15. a cleaning chamber; 16. cleaning the inlet; 17. cleaning the outlet; 18. cleaning the block; 19. a cleaning chamber; 20. a liquid inlet hole; 21. a liquid outlet hole; 22. a concave cavity; 23. an inlet flow passage; 24. an outlet flow passage; 25. and (4) a bump.
Detailed Description
The following describes embodiments of the present invention with reference to the drawings.
As shown in fig. 1 to 7, a high-pressure constant flow pump plunger sealing element according to this embodiment, a high-pressure constant flow pump includes a pump main body 1 and a pump head 2 fixedly connected to the pump main body 1, a pump chamber 3 and a pump inlet hole 4 and a pump outlet hole 5 communicated with the pump chamber 3 are provided in the pump head 2, a plunger 6 sliding in the pump chamber 3 is provided in the pump main body 1, the plunger sealing element includes a sealing ring 7 fixed on the plunger 6, the sealing ring 7 is sleeved on the plunger 6, the sealing ring 7 is substantially in a circular truncated cone shape, a diameter of one end of the sealing ring 7 close to the pump chamber 3 is smaller than a diameter of the other end of the sealing ring 7, the sealing ring 7 includes an integrally formed sliding section 8 and a matching sealing section 9, the sliding section 8 is in a column shape, the matching sealing section 9 is in a circular truncated cone shape, a sealing cavity 10 accommodating the matching sealing section 9 is provided in the pump head 2, the matching sealing section.
A guide post 11 is coaxially arranged in the middle of the sealing cavity 10, a through hole for the plunger 6 to pass through is coaxially arranged in the guide post 11, the through hole is communicated with the pump chamber 3, a sliding cavity 12 for accommodating the guide post 11 is arranged at the end part of the matching sealing section 9, and the matching sealing section 9 slides on the guide post 11 through the sliding cavity 12; the guide column 11 is composed of a plurality of guide blocks 13 extending along the axial direction of the plunger 6, the guide blocks 13 are uniformly distributed along the circumferential direction of the plunger 6, a gap is reserved between every two adjacent guide blocks 13, sliding blocks 14 corresponding to the gaps are arranged in the sliding cavity 12 respectively, and the sliding blocks 14 extend along the axial direction of the plunger 6; the slider 14 is integrally formed with the seal ring 7.
Still be equipped with the purge chamber 15 that communicates with pump chamber 3 in the pump head 2 and with the washing entry 16 and the washing export 17 of purge chamber 15 intercommunication, be equipped with cleaning block 18 in the purge chamber 15, cleaning block 18 is last to be equipped with along plunger 6's axial and to wash chamber 19, cleaning block 18 is located on plunger 6 through washing chamber 19 cover, be equipped with on the cleaning block 18 with wash the feed liquor hole 20 and the play liquid hole 21 of chamber 19 intercommunication, feed liquor hole 20 and washing entry 16 intercommunication, go out liquid hole 21 and washing export 17 intercommunication, be equipped with the cavity 22 that holds sliding section 8 on the cleaning block 18, the distance between cavity 22 and the sealed chamber 10 is greater than the thickness of sealing ring 7, sliding section 8 slides in cavity 22, the interior bottom of cavity 22 is equipped with the sealing end face with sliding section 8 matched with.
A cleaning flow channel is further arranged in the cleaning block 18, the cleaning flow channel comprises an inlet flow channel 23 and an outlet flow channel 24, one end of the inlet flow channel 23 is communicated with the liquid inlet hole 20, the other end of the inlet flow channel 23 is communicated with the concave cavity 22, one end of the outlet flow channel 24 is communicated with the concave cavity 22, and the other end of the inlet flow channel 23 is communicated with the liquid outlet hole 21; the cleaning inlet 16 and the cleaning outlet 17 are symmetrically arranged on the pump heads 2 at two radial sides of the plunger 6, the liquid inlet hole 20 and the liquid outlet hole 21 are symmetrically arranged on the cleaning blocks 18 at two radial sides of the plunger 6, and the inlet flow channel 23 and the outlet flow channel 24 are symmetrically arranged at two sides of the plunger 6; the openings of the inlet channel 23 and the outlet channel 24 on the sealing end surface are circular, the sealing ring 7 is further provided with a convex block 25 which is respectively matched with the inlet channel 23 and the outlet channel 24, and the convex block 25 is in a circular truncated cone shape.
The working principle of the invention is as follows:
when the plunger 6 moves backwards to suck liquid, the sealing ring 7 moves backwards along with the plunger 6, the matching sealing section 9 of the sealing ring 7 is separated from the sealing cavity 10, the matching sealing section 9 slides along the guide post 11, the sliding block 14 in the sliding cavity 12 slides along the gap between the guide blocks 13 until the sliding section 8 is in sealing fit with the sealing end face of the concave cavity 22, the convex block 25 respectively extends into the inlet flow channel 23 and the outlet flow channel 24 to seal the inlet flow channel 23 and the outlet flow channel 24, the plunger 6 is cleaned only through the cleaning cavity 19 of the cleaning block 18, the sliding block 14 is still in sealing fit with the guide block 13, the overall sealing performance is not influenced, no relative movement and no friction exist between the plunger 6 and the sealing ring 7, the loss of the plunger 6 can be reduced, and the service life of the plunger 6 is prolonged; when the plunger 6 moves forwards to pump liquid outwards, the sealing ring 7 moves forwards along with the plunger 6, the matching sealing section 9 slides along the guide column 11, the sliding block 14 in the sliding cavity 12 slides along the gap between the guide blocks 13 until the matching sealing section 9 is in sealing fit with the inner bottom conical surface of the sealing cavity 10, the convex block 25 is separated from the inlet flow channel 23 and the outlet flow channel 24 respectively, at the moment, the plunger 6 can be cleaned along with the plunger 6 in the cavity 22 through the cleaning block 18, the plunger 6 can be cleaned to the greatest extent, and the service life of the plunger 6 is prolonged.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. The utility model provides a plunger sealing member of high-pressure constant current pump, high-pressure constant current pump include pump main part and with pump main part fixed connection's pump head, be equipped with the pump chamber in the pump head and with pump inlet hole and pump outlet of pump chamber intercommunication, be equipped with in the pump main part and slide in the plunger in the pump chamber, its characterized in that, the plunger sealing member is including being fixed in sealing ring on the plunger, sealing ring cover is located on the plunger, the sealing ring is the round platform type roughly, the one end diameter that the sealing ring is close to the pump chamber is less than the diameter of the sealing ring other end, the sealing ring includes integrated into one piece's sliding segment and cooperation sealing segment, the sliding segment is the column, cooperation sealing segment is the round platform type, be equipped with in the pump head and hold the sealed chamber of cooperation sealing segment, cooperation sealing segment can slide in sealed intracavity, the interior bottom of sealed chamber be equipped with cooperation sealing segment, the middle part of the sealing cavity is coaxially provided with a guide post, a through hole for the plunger to pass through is coaxially arranged in the guide post, the through hole is communicated with the pump chamber, the end part of the matching sealing section is provided with a sliding cavity for accommodating the guide post, and the matching sealing section slides on the guide post through the sliding cavity.
2. The plunger sealing member of a high-pressure constant-flow pump according to claim 1, wherein the guide post is composed of a plurality of guide blocks extending along the axial direction of the plunger, the plurality of guide blocks are uniformly distributed along the circumferential direction of the plunger, a gap is left between every two adjacent guide blocks, and sliding blocks corresponding to the gaps are arranged in the sliding cavity and extend along the axial direction of the plunger.
3. The plunger seal of a high-pressure constant flow pump according to claim 2, wherein the slider is integrally formed with the seal ring.
4. The plunger seal of a high-pressure constant-flow pump according to any one of claims 1 to 3, it is characterized in that a cleaning chamber communicated with the pump chamber, a cleaning inlet and a cleaning outlet communicated with the cleaning chamber are also arranged in the pump head, a cleaning block is arranged in the cleaning chamber, a cleaning cavity is arranged on the cleaning block along the axial direction of the plunger, the cleaning block is sleeved on the plunger through the cleaning cavity, the cleaning block is provided with a liquid inlet hole and a liquid outlet hole which are communicated with the cleaning cavity, the liquid inlet hole is communicated with the cleaning inlet, the liquid outlet hole is communicated with the cleaning outlet, the cleaning block is provided with a concave cavity for accommodating the sliding section, the distance between the concave cavity and the sealing cavity is larger than the thickness of the sealing ring, the sliding section slides in the concave cavity, and the inner bottom of the concave cavity is provided with a sealing end face matched with the sliding section.
5. The plunger seal piece of a high-pressure constant-flow pump according to claim 4, wherein a cleaning flow channel is further arranged in the cleaning block, the cleaning flow channel comprises an inlet flow channel and an outlet flow channel, one end of the inlet flow channel is communicated with the liquid inlet hole, the other end of the inlet flow channel is communicated with the cavity, one end of the outlet flow channel is communicated with the cavity, and the other end of the inlet flow channel is communicated with the liquid outlet hole.
6. The plunger seal piece of claim 5, wherein the cleaning inlet and the cleaning outlet are symmetrically arranged on the pump head at two radial sides of the plunger, the liquid inlet hole and the liquid outlet hole are symmetrically arranged on the cleaning block at two radial sides of the plunger, and the inlet flow channel and the outlet flow channel are symmetrically arranged at two sides of the plunger.
7. The plunger seal of a high-pressure constant-flow pump according to claim 6, wherein the openings of the inlet channel and the outlet channel on the sealing end surface are circular, the sealing ring is further provided with a projection which is respectively matched with the inlet channel and the outlet channel, and the projection is in a circular truncated cone shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811144309.2A CN109209854B (en) | 2018-09-29 | 2018-09-29 | Plunger sealing element of high-pressure constant-flow pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811144309.2A CN109209854B (en) | 2018-09-29 | 2018-09-29 | Plunger sealing element of high-pressure constant-flow pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109209854A CN109209854A (en) | 2019-01-15 |
| CN109209854B true CN109209854B (en) | 2020-05-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811144309.2A Active CN109209854B (en) | 2018-09-29 | 2018-09-29 | Plunger sealing element of high-pressure constant-flow pump |
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| Country | Link |
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| CN (1) | CN109209854B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4077940A4 (en) * | 2019-12-20 | 2023-11-29 | Microfluidics International Corporation | High-pressure pump configuration |
| CN114483514B (en) * | 2022-02-14 | 2023-05-23 | 广州雪霸专用设备有限公司 | Multi-combination constant flow pump |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6776419B2 (en) * | 2002-06-05 | 2004-08-17 | Gregory S. Antoun | Seal for a reciprocating plunger |
| CN102338076A (en) * | 2011-09-28 | 2012-02-01 | 吴祎 | High-pressure self-cleaning plunger pump |
| CN205172919U (en) * | 2015-10-13 | 2016-04-20 | 广东新宝电器股份有限公司 | Electromagnetism vibrates pump |
| CN105508611A (en) * | 2015-11-25 | 2016-04-20 | 南方泵业股份有限公司 | Stuffing sealing structure and plunger pump with same |
| CN206860417U (en) * | 2017-06-07 | 2018-01-09 | 日照原野机械制造有限公司 | One kind opens draining oil well pump by force |
| CN207297338U (en) * | 2017-08-08 | 2018-05-01 | 江苏同济分析仪器有限公司 | A kind of plunger mechanism of liquid chromatograph high pressure pump |
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2018
- 2018-09-29 CN CN201811144309.2A patent/CN109209854B/en active Active
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| CN109209854A (en) | 2019-01-15 |
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