CN117267115A - Sealing structure of plunger type movement mechanism - Google Patents
Sealing structure of plunger type movement mechanism Download PDFInfo
- Publication number
- CN117267115A CN117267115A CN202311546410.1A CN202311546410A CN117267115A CN 117267115 A CN117267115 A CN 117267115A CN 202311546410 A CN202311546410 A CN 202311546410A CN 117267115 A CN117267115 A CN 117267115A
- Authority
- CN
- China
- Prior art keywords
- plunger
- medium
- pressure
- annular groove
- ring channel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000007246 mechanism Effects 0.000 title claims abstract description 48
- 238000007789 sealing Methods 0.000 title claims abstract description 24
- 230000001105 regulatory effect Effects 0.000 claims abstract description 14
- 239000012530 fluid Substances 0.000 claims description 23
- 230000009194 climbing Effects 0.000 claims description 9
- 239000000295 fuel oil Substances 0.000 claims description 4
- 239000010687 lubricating oil Substances 0.000 claims description 4
- 239000000446 fuel Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 5
- 239000003921 oil Substances 0.000 description 5
- 238000012423 maintenance Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 230000001050 lubricating effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
Classifications
-
- 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
- F04B53/02—Packing the free space between cylinders and pistons
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/04—Feeding by means of driven pumps
- F02M37/043—Arrangements for driving reciprocating piston-type pumps
-
- 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
- F04B53/16—Casings; Cylinders; Cylinder liners or heads; Fluid connections
- F04B53/162—Adaptations of cylinders
-
- 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
- F04B53/18—Lubricating
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Sealing Devices (AREA)
Abstract
The invention relates to the technical field of plunger type movement mechanisms, and discloses a sealing structure of a plunger type movement mechanism, which comprises a plunger and an outer sleeve, wherein the plunger is arranged in the outer sleeve, a gap is formed between the plunger and the outer sleeve, a high-pressure cavity is formed between the top of the plunger and the outer sleeve, a medium A is arranged in the high-pressure cavity, a plurality of annular grooves with openings facing the plunger are formed in the outer sleeve opposite to the side surface of the plunger, the annular grooves comprise a first annular groove, a second annular groove and a third annular groove, a pressure sensor is arranged in the first annular groove, a medium A is filled in the gap between the second annular groove and the top of the plunger, a medium B is externally connected with a medium conveying pipeline B, a pressure regulating valve is arranged on the medium B, and the medium B controls the pressure of the medium A to be equal to the medium pressure of the first annular groove through the pressure regulating valve. According to the invention, the medium A leaked in the high-pressure cavity is discharged by utilizing the pressure of the medium B, so that the medium A is prevented from further leakage, and the sealing is realized.
Description
Technical Field
The invention relates to the technical field of plunger type movement mechanisms, in particular to a sealing structure of a plunger type movement mechanism.
Background
At present, the fuel in the fuel pump on the diesel engine has leakage problem, the fuel leaks to the oil pan (the oil is filled) and can cause the oil to be polluted by the fuel, so that the further internal circulation of the oil cannot be performed.
The traditional solution is to design a complex sealing mechanism in the oil pan to isolate the high-pressure fluid leaked from the fuel chamber, and the sealing is usually an O-ring, however, the O-ring is easy to age, harden, temperature sensitivity and other problems, so that the original elasticity and tightness of the sealing ring are lost, and meanwhile, under the working environment of high temperature and high pressure, the service lives of the sealing rings are influenced, so that the sealing rings need to be checked and replaced regularly, thereby increasing the maintenance cost.
Therefore, the sealing structure of the plunger type movement mechanism of the fuel pump is easy to damage and has high maintenance cost.
Disclosure of Invention
The invention aims to solve the technical problems that the sealing structure of the plunger type movement mechanism of the existing fuel pump is easy to damage, short in service life and high in maintenance cost.
In order to solve the technical problems, the technical scheme of the invention is to provide a sealing structure of a plunger type movement mechanism, which comprises a plunger and an outer sleeve, wherein the plunger is arranged in the outer sleeve, a gap is arranged between the plunger and the outer sleeve, a high-pressure cavity is arranged between the top of the plunger and the outer sleeve, medium A is arranged in the high-pressure cavity, a plurality of annular grooves with openings facing the plunger are arranged on the outer sleeve opposite to the side surface of the plunger at the position of the gap, the annular grooves comprise a first annular groove, a second annular groove and a third annular groove, the first annular groove is close to the high-pressure cavity and is lower than the top of the plunger, the third annular groove is close to the bottom of the plunger and higher than the bottom of the plunger, the second annular groove is positioned between the first annular groove and the third annular groove, medium A is filled in a part of the gap between the first annular groove and the top of the plunger, medium B is externally connected with a medium B conveying pipeline, medium B is arranged in the medium conveying pipeline, a pressure sensor is arranged on the first annular groove, a pressure regulating valve is arranged on the medium B conveying pipeline, the pressure regulating valve is used for receiving a pressure signal of the pressure sensor, the pressure medium A is filled in a part between the first annular groove and the third annular groove and the first annular groove is lower than the pressure medium A and the pressure medium B is equal to the pressure medium in the third annular groove.
By adopting the technical scheme, the medium A leaked in the high-pressure cavity is discharged by utilizing the pressure of the medium B, so that the medium A is prevented from being further leaked, and the sealing is realized.
Optionally, the first annular groove is externally connected with a low-pressure fluid tank.
Optionally, a lifting mechanism chamber is arranged at the bottom of the plunger, the lower end of the plunger is connected with a plunger lifting mechanism, and the plunger lifting mechanism is arranged in the lifting mechanism chamber.
Optionally, a part of the medium B flows into the second annular groove along the gap, and the other part flows into the climbing mechanism chamber.
Optionally, the second annular groove is externally connected with a mixed fluid tank.
Optionally, the medium A is fuel oil, and the medium B is lubricating oil.
In summary, the invention has at least one of the following advantages:
1. the invention isolates the fluid in the high-pressure cavity and the jacking mechanism chamber by utilizing the pressure difference of the fluid, thereby realizing the sealing effect.
2. The invention reduces the traditional sealing mechanism, reduces the number of parts in the plunger lifting mechanism, reduces the size and the failure rate, prolongs the inspection and replacement period of the whole plunger type movement mechanism, has simple structural design, is easy to process and reduces the manufacturing cost.
3. The medium B for sealing has a lubricating effect, can fully lubricate the bottom of the plunger, and reduces friction and abrasion between kinematic pairs.
4. The pressure sensor and the pressure regulating valve are arranged, so that the pressure of the medium B can be automatically controlled, manual regulation is not needed, the operation is simple, and time and labor are saved.
Drawings
FIG. 1 is a schematic diagram of the structural principle of the present invention;
in the figure: 1. a plunger; 2. an outer sleeve; 3. a plunger lifting mechanism; 4. a high pressure chamber; 5. a low pressure fluid tank; 6. a first annular groove; 7. a second annular groove; 8. a third annular groove; 9. a medium conveying pipeline; 10. a climbing mechanism chamber; 11. a gap; 12. a mixing fluid tank; 13. a pressure sensor; 14. and a pressure regulating valve.
Detailed Description
The present invention is described in further detail below in conjunction with fig. 1.
The invention discloses a sealing structure of a plunger type movement mechanism, referring to fig. 1, comprising a plunger 1 and an outer sleeve 2, wherein the plunger 1 is arranged in the outer sleeve 2, a gap 11 is arranged between the plunger 1 and the outer sleeve 2, a high-pressure cavity 4 is arranged between the top of the plunger 1 and the outer sleeve 2, a medium A is arranged in the high-pressure cavity 4, a jacking mechanism chamber 10 is arranged at the bottom of the plunger 1, the lower end of the plunger 1 is connected with a plunger jacking mechanism 3, the plunger jacking mechanism 3 is arranged in the jacking mechanism chamber 10, a plurality of annular grooves with openings facing the plunger 1 are arranged on the outer sleeve 2 opposite to the side surface of the plunger 1 at the position of the gap 11, each annular groove comprises a first annular groove 6, a second annular groove 7 and a third annular groove 8, the first annular groove 6 is close to the top of the high-pressure cavity 4 and lower than the plunger (1), the third annular groove 8 is close to the bottom of the plunger 1 and higher than the bottom of the plunger (1), and the second annular groove 7 is positioned between the first annular groove 6 and the third annular groove 8;
the first annular groove 6 is externally connected with the low-pressure fluid tank 5, the second annular groove 7 is externally connected with the mixed fluid tank 12, a gap (11) is filled with a medium A in a part between the first annular groove (6) and the top of the plunger (1), the third annular groove 8 is externally connected with a medium B conveying pipeline 9, a medium B is arranged in the medium B conveying pipeline 9, a pressure sensor 13 is arranged on the first annular groove 6, a pressure regulating valve 14 is arranged on the medium B conveying pipeline 9, the pressure sensor 13 is connected with the pressure regulating valve 14, the pressure sensor 13 is used for monitoring the pressure of the medium A in the first annular groove 6, a pressure signal is given to the pressure regulating valve 14 introduced into the medium B conveying pipeline 9, and the pressure of the medium B is controlled to be equal to the pressure of the medium A in the first annular groove 6;
the pressure loss of the medium A occurs in the leakage process, so that the pressure of the medium A leaked to the second annular groove 7 is lower than the pressure of the medium A and the pressure of the medium B leaked to the third annular groove 8 in the first annular groove 6, the medium B flows to the second annular groove 7 to be mixed with the medium A due to the principle that the high-pressure fluid flows to the low-pressure fluid, the gap 11 is positioned between the first annular groove 6 and the third annular groove 8 to be filled with the mixed fluid of the medium A and the medium B, the pressure loss of the medium B is also caused in the process that the medium B flows to the second annular groove 7, and the pressure of the mixed fluid is lower than the pressure of the medium A in the first annular groove 6 and the pressure of the medium B in the third annular groove 8, so that mutual cross flow between the two mediums due to pressure difference fluctuation in the flowing process is prevented.
Another part of the medium B flows into the second annular groove 7 along the gap 11, and another part flows into the climbing mechanism chamber 10.
The medium A is fuel oil, the medium B is lubricating oil, and the lubricating oil is continuously introduced when the plunger type movement mechanism works and is used for lubricating the plunger.
The working principle of the invention is as follows: when the plunger 1 moves up and down in the outer sleeve 2, the gap 11 exists between the plunger 1 and the outer sleeve, so that fuel oil in the high-pressure cavity 4 leaks, after the A medium in the high-pressure cavity 4 leaks to the first annular groove 6, part of the leaked A medium flows back to the low-pressure fluid tank 5, the pressure of the other part of the A medium drops sharply due to unloading action of the first annular groove 6, and flows further to the second annular groove 7 along the gap 11, at this time, the pressure sensor 13 reads the A medium pressure in the first annular groove 6 and transmits a signal to the pressure regulating valve 14, the B medium pressure in the B medium conveying pipeline 9 is regulated to be the same as the A medium pressure in the first annular groove 6, part of the B medium flows to the second annular groove 7 along the gap 11 between the plunger 1 and the outer sleeve 2, and the B medium pressure is equal to the pressure in the first annular groove 6, so that the B medium intercepts the leaked A medium between the third annular groove 8 and the first annular groove 6 to form mixed fluid, and then the mixed fluid in the gap 11 is led out from the second annular groove 7 to the first annular groove 12, and the other part of the B medium flows to the climbing mechanism 10 as the high-pressure climbing mechanism in the annular groove 10, and the climbing mechanism is sealed in the climbing mechanism, and the climbing mechanism is sealed in the high-pressure medium 10.
The invention utilizes the pressure difference of the fluid to isolate the fluid in the high-pressure cavity 4 and the jacking mechanism chamber 10, realizes the sealing effect, reduces the traditional sealing mechanism, reduces the number of parts in the plunger jacking mechanism, reduces the size and the failure rate, prolongs the inspection and replacement period of the whole plunger type movement mechanism, has simple structural design, is easy to process and reduces the manufacturing cost; and set up pressure sensor 13 and air-vent valve 14, can automatically regulated B medium's pressure, realize dynamic seal, the fluid in clearance 11 has the lubrication action simultaneously, can fully lubricate plunger 1, reduces the frictional wear between the kinematic pair.
It should be noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solution of the present invention may be modified or substituted without departing from the spirit and scope of the technical solution of the present invention, which is intended to be covered in the scope of the claims of the present invention.
Claims (6)
1. The utility model provides a seal structure of plunger formula motion mechanism, its characterized in that includes plunger (1) and outer sleeve (2), plunger (1) are established in outer sleeve (2), and be equipped with clearance (11) between plunger (1) and outer sleeve (2), be high-pressure chamber (4) between plunger (1) top and outer sleeve (2), be equipped with A medium in high-pressure chamber (4), be equipped with a plurality of openings on outer sleeve (2) that are located in clearance (11) and are opposite with plunger (1) side, the ring channel includes first ring channel (6), second ring channel (7) and third ring channel (8), first ring channel (6) are close to high-pressure chamber (4) and are less than plunger (1) top, third ring channel (8) are close to plunger (1) bottom and are higher than plunger (1) bottom, second ring channel (7) are located between first ring channel (6) and third ring channel (8), clearance (11) are located in the part between first ring channel (6) and plunger (1) top and are filled in portion A, third ring channel (9) are equipped with medium delivery groove (9) on the ring channel B, medium delivery groove (9) are equipped with in the ring channel B, the pressure regulating valve (14) is arranged on the medium conveying pipeline (9) B, the pressure regulating valve (14) receives a pressure signal of the pressure sensor (13), a gap (11) is positioned between the first annular groove (6) and the third annular groove (8), mixed fluid of medium A and medium B is filled in the part, the pressure of the mixed fluid is smaller than the pressure of medium B in the third annular groove (8) and the pressure of medium A in the first annular groove (6), and the pressure of medium B in the third annular groove (8) is equal to the pressure of medium A in the first annular groove (6).
2. The sealing structure of a plunger type movement mechanism according to claim 1, wherein the first annular groove (6) circumscribes a low pressure fluid tank (5).
3. The sealing structure of the plunger type movement mechanism according to claim 1, wherein a jack mechanism chamber (10) is provided at the bottom of the plunger (1), the plunger jack mechanism (3) is connected to the lower end of the plunger (1), and the plunger jack mechanism (3) is provided in the jack mechanism chamber (10).
4. A sealing arrangement for a plunger type movement mechanism according to claim 3, characterized in that the medium B flows partly along the gap (11) into the second annular groove (7) and partly into the climbing mechanism chamber (10).
5. A sealing arrangement for a plunger type movement mechanism according to claim 1, characterized in that the second annular groove (7) circumscribes a mixing fluid tank (12).
6. The seal structure of a plunger type movement mechanism according to claim 1, wherein the medium a is fuel oil and the medium B is lubricating oil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311546410.1A CN117267115A (en) | 2023-11-20 | 2023-11-20 | Sealing structure of plunger type movement mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311546410.1A CN117267115A (en) | 2023-11-20 | 2023-11-20 | Sealing structure of plunger type movement mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117267115A true CN117267115A (en) | 2023-12-22 |
Family
ID=89214650
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311546410.1A Pending CN117267115A (en) | 2023-11-20 | 2023-11-20 | Sealing structure of plunger type movement mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117267115A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB9018810D0 (en) * | 1989-08-30 | 1990-10-10 | Waertsilae Nsd Oy Ab | Injection pump for fuel |
| CN109098691A (en) * | 2018-08-01 | 2018-12-28 | 张洪源 | A kind of hydraulic oil pumping system and its application method |
| CN111396221A (en) * | 2020-03-31 | 2020-07-10 | 潍柴重机股份有限公司 | High-pressure oil pump sealing oil control system and method under light-heavy oil conversion |
| CN112523909A (en) * | 2020-11-30 | 2021-03-19 | 重庆红江机械有限责任公司 | Isobaric injection pump of high-speed machine |
| CN218971408U (en) * | 2022-10-12 | 2023-05-05 | 王彪 | Sealing device for plunger pump |
| CN116773109A (en) * | 2023-04-10 | 2023-09-19 | 烟台东德氢能技术有限公司 | Method for detecting leakage of plunger cylinder body of circulating liquid seal compressor |
-
2023
- 2023-11-20 CN CN202311546410.1A patent/CN117267115A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB9018810D0 (en) * | 1989-08-30 | 1990-10-10 | Waertsilae Nsd Oy Ab | Injection pump for fuel |
| CN109098691A (en) * | 2018-08-01 | 2018-12-28 | 张洪源 | A kind of hydraulic oil pumping system and its application method |
| CN111396221A (en) * | 2020-03-31 | 2020-07-10 | 潍柴重机股份有限公司 | High-pressure oil pump sealing oil control system and method under light-heavy oil conversion |
| CN112523909A (en) * | 2020-11-30 | 2021-03-19 | 重庆红江机械有限责任公司 | Isobaric injection pump of high-speed machine |
| CN218971408U (en) * | 2022-10-12 | 2023-05-05 | 王彪 | Sealing device for plunger pump |
| CN116773109A (en) * | 2023-04-10 | 2023-09-19 | 烟台东德氢能技术有限公司 | Method for detecting leakage of plunger cylinder body of circulating liquid seal compressor |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2022016911A1 (en) | Plunger pump and pump station | |
| CN102278479A (en) | Y-shaped sealing unit | |
| CN104358705A (en) | Cartridge mechanical sealing device for abrasion-resistant pump | |
| CN112855520B (en) | Double-cylinder pumping device with stroke controlled for viscous material | |
| CN110345064A (en) | A kind of drilling pump swimming type intermediate draw bar sealing structure | |
| CN108266429A (en) | A kind of water-oil separating water hydraulic standing balance sealing and lubrication plunger | |
| CN117267115A (en) | Sealing structure of plunger type movement mechanism | |
| CN108533430B (en) | Super-high pressure fuel pump structure of diesel engine | |
| CN201687688U (en) | Oilless packing assembly of piston type compressor | |
| CN210496847U (en) | Centrifuge scraper seal structure | |
| CN102734131A (en) | Full-automatic oil injection system of high-pressure compressor | |
| CN102777496B (en) | Many oil pocket static pressure film thickness autocompensation installations and system | |
| CN103192546B (en) | Forcing press balancer piston lubricating apparatus | |
| CN202468766U (en) | Oil lubrication non-contact type back stopper | |
| CN212616283U (en) | External cooling type sealing box structure | |
| CN210800114U (en) | Lifting plug valve | |
| CN209800241U (en) | Sealing and lubricating structure of low-viscosity liquid plunger pump | |
| CN109654229B (en) | Compensation spring external protection integrated mechanical sealing device | |
| CN2866902Y (en) | Directional sealing lubricating ring | |
| CN219774246U (en) | High-efficient lubricated direct injection type fuel injection pump | |
| US3249062A (en) | High speed triplex pump | |
| CN106593729B (en) | Anti-internal leakage structure of single pump and single pump with same | |
| CN107827018B (en) | A kind of interior jacking system of press bench | |
| CN111911406A (en) | High-pressure grouting pump hydraulic end with linear bearing | |
| CN111706502A (en) | Sealing device for high-pressure plunger water injection pump packing of offshore oil platform |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |