CN111022431A - Sealing device of piston rod - Google Patents
Sealing device of piston rod Download PDFInfo
- Publication number
- CN111022431A CN111022431A CN201911387262.7A CN201911387262A CN111022431A CN 111022431 A CN111022431 A CN 111022431A CN 201911387262 A CN201911387262 A CN 201911387262A CN 111022431 A CN111022431 A CN 111022431A
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- CN
- China
- Prior art keywords
- piston rod
- sealing
- oil
- groove
- ring
- 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.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/20—Other details, e.g. assembly with regulating devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/20—Other details, e.g. assembly with regulating devices
- F15B15/22—Other details, e.g. assembly with regulating devices for accelerating or decelerating the stroke
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16N—LUBRICATING
- F16N1/00—Constructional modifications of parts of machines or apparatus for the purpose of lubrication
Abstract
The invention discloses a sealing device of a piston rod, which comprises a piston rod and a mounting seat, wherein the piston rod is arranged in the mounting seat, a sealing ring assembly, an oil conveying assembly, a gas leakage ring assembly and an oil scraping ring assembly are arranged in the mounting seat, the sealing ring assembly comprises a sealing ring and a sealing groove, a first telescopic column is arranged at the bottom of the sealing groove, a second telescopic column is arranged at the side edge of the sealing groove, the oil conveying assembly comprises an oil conveying tank and an oil conveying pipe, the oil conveying tank is arranged on the outer surface of the mounting seat, one end of the oil conveying pipe is communicated with the oil conveying tank, and the other end of the oil conveying pipe penetrates through the mounting. The invention has the advantages that: the friction between piston rod and the mount pad and between sealing washer and the seal groove can be effectual reduces, and reducing wear prolongs the life of piston rod and sealing member.
Description
Technical Field
The invention belongs to the technical field of piston rods, and particularly relates to a sealing device of a piston rod.
Background
The piston rod is a connecting part for supporting the piston to do work, most of the piston rod is applied to oil cylinder and air cylinder movement executing parts and is a movement part with frequent movement and high technical requirement, the piston rod is mainly used for piston rods for hydraulic pneumatics, engineering machinery and automobile manufacturing, guide posts of plastic machinery, roll shafts of packaging machinery and printing machinery, shafts of textile machinery and conveying machinery, and the piston rod needs to be sealed in the future by sealing to prevent dust from entering and leakage.
The key point of the existing piston rod related to sealing lies in the region where the piston rod penetrates into the cylinder, wherein the passage is also called as a piston rod sealing assembly, if the sealing effect is poor, dust easily enters the piston to cause the interior of the piston to be worn, the service life of the piston is reduced, and no lubricating adding device is arranged between the sealing element and the piston rod, so that dry friction is easy to occur, the sealing element is required to bear extremely high mechanical load and thermal load, the abrasion of the sealing element is increased, and the sealing element is required to be frequently replaced and is inconvenient.
Disclosure of Invention
In order to solve the above problems, the present invention provides the following technical solutions: the utility model provides a sealing device of piston rod, includes piston rod and mount pad, the piston rod sets up in the mount pad, be equipped with seal ring subassembly, oil transportation subassembly, gas leakage ring subassembly and oil scraping ring subassembly in the mount pad, the seal ring subassembly includes sealing washer and seal groove, the bottom of seal groove is equipped with first flexible post, the side of seal groove is equipped with the flexible post of second, the oil transportation subassembly includes oil transportation tank and defeated oil pipe, the mount pad surface is located to the oil transportation tank, defeated oil pipe one end intercommunication oil transportation tank, the inside wall of seal groove is connected to the one end through the mount pad.
Further, first flexible post and the flexible post of second constitute by magnet, the side and the base of seal groove all are equipped with the post groove that holds first flexible post and the flexible post of second, the post inslot is equipped with the electro-magnet.
Furthermore, the leakage ring assembly comprises a leakage sealing ring and a leakage pipeline, an inner hole is formed in the leakage sealing ring and tightly attached to the piston rod, and the leakage pipeline is communicated with the inner hole in the leakage sealing ring.
Further, the oil scraper ring assembly comprises an oil scraper ring, a telescopic annular seam arranged around the oil scraper ring and an annular cover arranged outside, an annular clamping key capable of being clamped into the telescopic annular seam in a rotating mode is arranged on the annular cover, and the annular width of one side, far away from the annular cover, of the annular seam is smaller than the annular width of one side, close to the annular cover.
Furthermore, the bottom of the oil delivery tank is provided with a pushing plate, the top of the pushing plate is provided with a connecting rod, and the top of the pushing plate is connected with the top of the piston rod through the connecting rod.
Furthermore, a valve for controlling the opening and closing of the oil conveying pipe is arranged on the oil conveying tank.
Further, the top of mount pad is equipped with the mounting groove, the mounting groove is inlayed and is had dustproof cap.
Furthermore, the quantity of sealing washer and seal groove is a plurality of, sets up along the mount pad is vertical.
Furthermore, at least two first telescopic columns and two second telescopic columns are arranged in the sealing groove.
The invention has the advantages that:
1. according to the invention, the sealing effect of the piston rod can be effectively improved by arranging the plurality of sealing ring assemblies, and meanwhile, the oil conveying assembly is arranged to provide lubricating oil when the piston rod works, so that the friction between the piston rod and the mounting seat is reduced, the abrasion of the piston rod is reduced, and the service life of the piston rod is prolonged.
2. According to the invention, the first telescopic column and the second telescopic column are arranged on the sealing groove, and the gap between the sealing ring and the sealing groove is adjusted through the two telescopic columns, so that lubricating oil can conveniently enter the surface of the piston rod better, friction between the sealing ring and the sealing groove can be reduced, and the service life of the sealing ring assembly is prolonged.
3. The outer side of the oil scraper ring is provided with the telescopic annular seam and the annular cover arranged outside, the annular cover is provided with the annular clamping key which can be rotatably clamped into the telescopic annular seam, when the oil scraper ring is worn after being used for a long time, the annular clamping key penetrates into the telescopic annular seam through rotating the annular cover, the worn part of the oil scraper ring can be supplemented, and the service life of the oil scraper ring is prolonged.
4. According to the invention, the piston rod and the pushing plate are connected through the connecting rod, the piston rod is used for providing power for the oil delivery tank, the energy utilization rate is improved, meanwhile, the pushing plate can provide certain buffer force for the piston rod when the piston rod sucks air, and the piston rod is prevented from moving to the top, so that the speed is high, and great impact is exerted on connecting equipment.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
FIG. 2 is a schematic structural view of a seal ring and a seal groove when a piston rod sucks air;
FIG. 3 is a schematic view of the piston rod in a compressed configuration;
FIG. 4 is a schematic view of the sealing ring being stressed when the piston rod is inhaling;
fig. 5 is a schematic view of the structure of the dust cap.
In the figure: 1. a piston rod; 2. a mounting seat; 3. a seal ring; 4. a sealing groove; 5. a first telescopic column; 6. a second telescopic column; 7. an oil delivery tank; 8. an oil delivery pipe; 9. a column groove; 10. an electromagnet; 11. a leakage sealing ring; 12. a gas leakage pipeline; 13. an oil scraper ring; 14. expansion circular seams; 15. a ring cover; 16. a card key; 17. a push plate; 18. a connecting rod; 19. mounting grooves; 20. a dust cap.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
Referring to fig. 1-4, a piston rod sealing device comprises a piston rod 1 and a mounting seat 2, the piston rod 1 is disposed in the mounting seat 2, the mounting seat 2 is provided with a seal ring assembly, an oil delivery assembly, a gas leakage ring assembly and an oil scraping ring assembly, the seal ring assembly comprises a seal ring 3 and a seal groove 4, the bottom of the seal groove 4 is provided with a first telescopic column 5, the side of the seal groove 4 is provided with a second telescopic column 6, the oil delivery assembly comprises an oil delivery tank 7 and an oil delivery pipe 8, the oil delivery tank 7 is disposed on the outer surface of the mounting seat 2, one end of the oil delivery pipe 8 is communicated with the oil delivery tank 7, the other end of the oil delivery pipe penetrates through the mounting seat 2 and is connected with the inner side wall of the seal groove 4, the first telescopic column 5 and the second telescopic column 6 are both composed of magnets, the side and the bottom edge of the seal groove 4 are both provided with a column groove 9 for accommodating the first telescopic column 5 and the second telescopic column, the first gap needs to be achieved by extending the second telescopic column 6, the purpose of the second telescopic column 6 is to achieve radial movement of the sealing ring 3, the initial purpose is to achieve centering of the sealing ring 3 relative to the piston rod 1, meanwhile, lubricating oil can be introduced into the sealing groove 4 through the gap, meanwhile, lubricating oil can enter the surface of the piston rod 1 through the gap in the sealing groove 4, in fact, only a small part of lubricating oil entering the sealing groove 4 can flow into the surface of the piston rod 1, meanwhile, due to the action of the second telescopic rod, the sealing ring 3 can generate friction with the sealing groove 4 while moving in the sealing groove 4 in the radial direction, so that abrasion is caused, in order to overcome the problems, the second telescopic column 6 is arranged at the bottom of the sealing groove 4, the second telescopic column 6 can slightly lift the sealing ring 3 by a distance of 0.1 to 1mm, and when the piston rod 1, a constant suction force is generated at the sealing groove 4, as shown in fig. 4, the sealing ring 3 originally receives only the pressure P1 between the sealing ring 3 and the surface of the piston rod 1, the pressure P2 between the top of the sealing ring 3 and the top of the inner side of the sealing groove 4, and the pressure P3 between the top of the sealing ring 3 and the gap of the inner side wall of the sealing groove 4, when the first telescopic rod acts, the bottom of the sealing ring 3 is lifted for a certain distance, at this time, the bottom of the sealing ring 3 receives an upward pressure P4 generated by the occurrence of the gap, at this time, the whole force of the sealing ring 3 acting on the bottom of the inner cavity of the sealing groove 4 originally is reduced due to the generation of P4, and after the whole force is reduced, the friction force between the bottom of the sealing ring 3 and the bottom of the inner cavity of the sealing groove 4 is reduced, so that the, the abrasion of the bottom of the sealing ring 3 is reduced, and lubricating oil can conveniently flow into the surface of the piston rod 1 from the sealing groove 4 along with a gap generated by the first telescopic column 5, so that not only can the friction between the surface of the piston rod 1 and the mounting seat 2 be reduced, but also the friction between the bottom of the sealing ring 3 and the bottom of the inner cavity of the sealing groove 4 can be reduced as the lubricating oil passes through the bottom of the sealing ring 3, the first telescopic rod and the second telescopic rod are made of magnets, an electromagnet 10 in a column groove 9 is started through an internal power supply or an external power supply, so that a magnetic field can be generated around the first telescopic rod and the second telescopic rod to drive the telescopic rods to move, the two telescopic rods can be driven to move through other known driving modes besides the magnetic field, the first telescopic rod can only be started when the piston rod 1 performs suction motion, other states are in normal states, and the bottom of, the mounting seat 2 is also provided with an air leakage ring assembly which comprises an air leakage sealing ring 11 and an air leakage pipeline 12, an inner hole on the air leakage sealing ring 11 is tightly attached to the piston rod 1, the air leakage pipeline 12 is communicated with the inner hole on the air leakage sealing ring 11, the air leakage ring assembly aims to reduce the leakage amount of the sealing ring assembly, so that leaked air is dissipated through the air leakage pipeline 12, the assembly is the prior art and is not limited in the application, the air leakage ring assembly can be one of any leakage assemblies in the piston rod 1 on the market, the oil scraper ring assembly is also arranged in the application, the oil scraper ring assembly comprises an oil scraper ring 13, a telescopic annular seam 14 arranged around the oil scraper ring 13 and an annular cover 15 arranged outside, the annular cover 15 is provided with an annular clamping key 16 capable of being clamped into the telescopic annular seam 14 in a rotating manner, the annular width of the telescopic annular seam 14 far away from one side of the annular cover 15 is smaller than the annular width close to one side of the annular cover 15, and the surface, at this time, through the rotating ring cover 15, the part of the annular clamp key 16 extending into the telescopic annular gap 14 is increased, the telescopic annular gap 14 is expanded by the periphery of the extrusion annular gap of the clamp key 16, the oil scraper ring 13 generates a pressure tightened in the axis direction of the piston rod 1, the worn part of the oil scraper ring 13 can be supplemented, the service life of the oil scraper ring 13 is prolonged, the bottom of the oil delivery box 7 of the application is provided with a push plate 17, the top of the push plate 17 is provided with a connecting rod 18, the top of the push plate 17 is connected with the top of the piston rod 1 through the connecting rod 18, the oil delivery box 7 is provided with a valve for controlling the opening and closing of the oil delivery pipe 8, when the piston rod 1 moves upwards in an air suction motion, the push plate, make lubricating oil in the fuel delivery tank 7 get into mount pad 2 inside, the top of mount pad 2 is equipped with mounting groove 19, has inlayed dust cap 20 in the mounting groove 19 for further guarantee the inside clean and tidy of mount pad 2.
The use principle of the invention is as follows: when the piston rod 1 is sucked and lifted upwards, the pushing plate 17 is driven to move upwards, the pushing plate 17 extrudes lubricating oil in the oil conveying tank 7 to enter the sealing groove 4, at the moment, the first telescopic column 5 is lifted upwards under the action of the electromagnet 10 and then drives the second telescopic column 6 to act, a certain space is provided for the entering of the lubricating oil while the centering adjustment of the sealing ring 3 around the piston rod 1 is completed, the lubricating oil enters the surface of the piston rod 1 along a gap in the sealing groove 4, in the process, the bottom friction force of the sealing ring 3 is reduced, the abrasion caused by radial movement is reduced, the abrasion of the oil scraper ring 13 can be compensated by rotating the ring cover 15 at the bottom, the sealing effect of the piston rod 1 can be effectively improved by arranging a plurality of sealing ring assemblies, meanwhile, the oil conveying assembly is arranged to provide the lubricating oil when the piston rod 1 works, and the friction between the piston rod 1 and the mounting seat, reduce the piston rod 1 wearing and tearing, prolong piston rod 1 life.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1. The utility model provides a sealing device of piston rod, includes piston rod (1) and mount pad (2), piston rod (1) sets up in mount pad (2), its characterized in that: be equipped with sealing ring subassembly, oil transportation subassembly, gas leakage ring subassembly and frizing ring subassembly in mount pad (2), the sealing ring subassembly includes sealing washer (3) and seal groove (4), the bottom of seal groove (4) is equipped with first flexible post (5), the side of seal groove (4) is equipped with the flexible post of second (6), the oil transportation subassembly includes oil transportation case (7) and defeated oil pipe (8), mount pad (2) surface is located in oil transportation case (7), defeated oil pipe (8) one end intercommunication oil transportation case (7), the inside wall of seal groove (4) is connected in mount pad (2) is run through to one end.
2. A piston rod seal assembly according to claim 1, wherein: first flexible post (5) and the flexible post of second (6) constitute by magnet, the side and the base of seal groove (4) all are equipped with post groove (9) that hold first flexible post (5) and the flexible post of second (6), be equipped with electro-magnet (10) in post groove (9).
3. A piston rod seal assembly according to claim 1, wherein: the gas leakage ring assembly comprises a gas leakage sealing ring (11) and a gas leakage pipeline (12), an inner hole is formed in the gas leakage sealing ring (11) and tightly attached to the piston rod (1), and the gas leakage pipeline (12) is communicated with the inner hole in the gas leakage sealing ring (11).
4. A piston rod seal assembly according to claim 1, wherein: the oil scraper ring assembly comprises an oil scraper ring (13), a telescopic annular seam (14) arranged around the oil scraper ring (13) and an annular cover (15) arranged outside, wherein an annular clamping key (16) capable of being clamped into the telescopic annular seam (14) in a rotating mode is arranged on the annular cover (15), and the annular width of one side, far away from the annular cover (15), of the annular seam is smaller than the annular width of one side, close to the annular cover (15).
5. A piston rod seal assembly according to claim 1, wherein: the bottom of the oil conveying tank (7) is provided with a pushing plate (17), the top of the pushing plate (17) is provided with a connecting rod (18), and the top of the pushing plate (17) is connected with the top of the piston rod (1) through the connecting rod (18).
6. A piston rod seal assembly according to claim 1, wherein: and a valve for controlling the opening and closing of the oil conveying pipe (8) is arranged on the oil conveying tank (7).
7. A piston rod seal assembly according to claim 1, wherein: the top of mount pad (2) is equipped with mounting groove (19), inlay in mounting groove (19) and have dustproof cap (20).
8. A piston rod seal assembly according to claim 1, wherein: the number of the sealing rings (3) and the sealing grooves (4) is a plurality of, and the sealing rings and the sealing grooves are longitudinally arranged along the mounting seat (2).
9. A piston rod seal assembly according to claim 1, wherein: at least two first telescopic columns (5) and two second telescopic columns (6) are arranged in the sealing groove (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911387262.7A CN111022431A (en) | 2019-12-30 | 2019-12-30 | Sealing device of piston rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911387262.7A CN111022431A (en) | 2019-12-30 | 2019-12-30 | Sealing device of piston rod |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111022431A true CN111022431A (en) | 2020-04-17 |
Family
ID=70195467
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911387262.7A Pending CN111022431A (en) | 2019-12-30 | 2019-12-30 | Sealing device of piston rod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111022431A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112628236A (en) * | 2020-12-16 | 2021-04-09 | 宁波盛德气动液压有限公司 | Hydraulic cylinder dust-adhering prevention device for supplementing auxiliary hydraulic oil by utilizing self movement |
-
2019
- 2019-12-30 CN CN201911387262.7A patent/CN111022431A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112628236A (en) * | 2020-12-16 | 2021-04-09 | 宁波盛德气动液压有限公司 | Hydraulic cylinder dust-adhering prevention device for supplementing auxiliary hydraulic oil by utilizing self movement |
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