CN212774731U - Multi-lip sealing ring for plunger rod assembly and plunger pump - Google Patents
Multi-lip sealing ring for plunger rod assembly and plunger pump Download PDFInfo
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- CN212774731U CN212774731U CN202021599494.7U CN202021599494U CN212774731U CN 212774731 U CN212774731 U CN 212774731U CN 202021599494 U CN202021599494 U CN 202021599494U CN 212774731 U CN212774731 U CN 212774731U
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Abstract
A multi-lip sealing ring for a plunger rod assembly and a plunger pump relate to the technical field of sealing rings. Wherein the plunger rod assembly comprises: plunger pole and plunger seat, many lips sealing washer include: the sealing ring comprises a sealing ring inner sleeve, a sealing ring outer sleeve and an elastic piece; the sealing ring inner sleeve is sleeved on the plunger rod and is assembled with the plunger rod in a sliding and sealing manner, and the sealing ring inner sleeve is used for increasing the sealing length between the sealing ring inner sleeve and the plunger rod and storing abrasive dust generated when the plunger rod and the sealing ring inner sleeve slide relatively; the outer sealing ring sleeve is sleeved on the inner sealing ring sleeve to protect the inner sealing ring sleeve; the elastic member is arranged between the sealing ring inner sleeve and the sealing ring outer sleeve, is close to one side of the plunger seat and is used for locking one side, close to the plunger seat, of the sealing ring inner sleeve so as to play a sealing role. The multi-lip sealing ring adopting the technical scheme has the advantages of large sealing section area, good sealing effect, long service life, simple structure and ingenuity.
Description
Technical Field
The utility model relates to a sealing washer technical field, concretely relates to a plunger rod subassembly and plunger pump that is used for many lips of plunger rod subassembly sealing washer and application.
Background
The sealing ring is widely applied to various industries as a common mechanical part and mainly plays a role in preventing liquid and gas from leaking. And the sealing ring for the plunger rod assembly is mainly sleeved on the plunger rod, and can always keep a sealing effect when the plunger rod and the sealing ring move relatively.
Most of the existing sealing rings for plunger rod assemblies are made of PTFE (polytetrafluoroethylene) materials, and spring steel wires are embedded in the front ends of the sealing rings. Although it can perform a good sealing function, the sealing length is short. When current sealing washer is used for sealed strong acid, the alkali, it is volatile, when meeting the easy crystallization liquid of air, have the defect:
(1) the embedded stainless steel spring steel wire at the front end is soaked in a strong corrosive liquid for a long time and is easy to corrode, so that the sealing performance is reduced;
(2) because the sealing ring is sleeved on the plunger rod, and the sealing length is short, when the plunger rod moves back, the strongly-corrosive liquid attached to the surface of the plunger rod is contacted with air, so that chemical reaction is easy to occur, crystallization is generated, the wear resistance is reduced, and the practical service life is further influenced.
Therefore, in order to solve the above problems, a seal ring used for a plunger rod, having a long service life and a good sealing effect is desired to be developed.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects and shortcomings of the prior art, the first purpose of the utility model is to provide a multi-lip sealing ring for a plunger rod assembly, which is contacted with a plunger rod through a first lip opening and a second lip opening, so that the contact area of the multi-lip sealing ring and the plunger rod is fully prolonged, and the sealing effect of the multi-lip sealing ring is improved; and when the plunger rod assembly works, the liquid attached to the plunger rod assembly is scraped through the first lip part arranged, the contact of sealed liquid and external air is avoided, meanwhile, the accommodating cavity formed by enclosing the second lip part and the first lip part is arranged, the abrasive dust generated by friction winding between the second lip part and the plunger rod is accommodated, the abrasive dust is prevented from entering the sealed liquid, the sealing section area is large, the sealing effect is good, the service life is long, the structure is simple, and the advantages are ingenious.
In order to achieve the above object, the utility model adopts the following technical scheme: a multi-lip seal for a plunger rod assembly, the plunger rod assembly comprising: plunger pole and plunger seat, many lips sealing washer includes: the sealing ring comprises a sealing ring inner sleeve, a sealing ring outer sleeve and an elastic piece; the sealing ring inner sleeve is sleeved on the plunger rod and is assembled with the plunger rod in a sliding and sealing mode, and the sealing ring inner sleeve is used for increasing the sealing length between the sealing ring inner sleeve and the plunger rod and storing abrasive dust generated when the plunger rod and the sealing ring inner sleeve slide relatively; the outer sealing ring sleeve is sleeved on the inner sealing ring sleeve to protect the inner sealing ring sleeve; the elastic piece set up in the sealing washer endotheca with between the sealing washer overcoat, just the elastic piece is close to plunger seat one side, the elastic piece is used for locking be close to on the sealing washer endotheca plunger seat one side to play sealed effect.
The sealing washer endotheca includes: an inner sleeve body; the first lip opening is arranged on the inner sleeve body, is far away from one side of the elastic part and is in contact with the plunger rod, and when the plunger rod slides relative to the sealing ring, the first lip opening is used for scraping off residual liquid on the plunger rod; and the second lip opening part is arranged on the inner sleeve body, is close to one side of the elastic part and is in contact with the plunger rod, and is surrounded with the first lip opening part to form an accommodating cavity which is used for collecting abrasive dust generated by friction between the second lip opening part and the plunger rod.
The first lip opening part forms a first inner hole, the second lip opening part forms a second inner hole, and the aperture of the first inner hole and the aperture of the second inner hole are smaller than the outer diameter of the plunger rod.
The inner wall of the first inner hole is a conical surface, and the inner diameter close to one side of the accommodating cavity is larger than the inner diameter far away from one side of the accommodating cavity.
The inner wall of the second inner hole is a conical surface, and the inner diameter close to one side of the accommodating cavity is smaller than the inner diameter far away from one side of the accommodating cavity.
The inner sleeve of the sealing ring is made of an elastic plastic part, and the position, corresponding to the elastic part, of the second lip part is sunken towards one side of the plunger rod under the elastic action of the elastic part.
The material of sealing washer overcoat is 304 stainless steel, the elastic component is ring spring, and the material of elastic component is 316 stainless steel.
After the technical scheme is adopted, the utility model discloses beneficial effect does:
1. through the contact of the first lip oral area and the second lip oral area that set up with the plunger rod, increase the elastic component and seal, increase sealed length, fully prolong the area of contact of many lips sealing washer and plunger rod, avoid liquid and air contact to produce the crystallization to promote the sealed effect of many lips sealing washer.
2. The inner walls of the first inner hole and the second inner hole are set to be conical surfaces, so that the first lip opening part (turning right from left) and the second lip opening part (turning right from left) can hold the plunger rod more and more when the sealing pressure is larger, and a good sealing effect is achieved when the high pressure is (5 MPa).
3. Liquid attached to the plunger rod assembly is scraped through the first lip opening portion, sealed liquid is prevented from contacting with external air, meanwhile, the second lip opening portion and the first lip opening portion are arranged in a surrounding mode to form a containing cavity, abrasive dust generated by friction winding between the second lip opening portion and the plunger rod is stored, and the abrasive dust is prevented from entering sealed liquid.
The second aim at provides a plunger pump, has simple structure, design benefit, long service life, sealed effectual advantage to prior art's defect and not enough.
In order to achieve the above object, the utility model adopts the following technical scheme: a plunger pump comprising: plunger pole subassembly and the many lips mouth sealing washer that cover was located on the plunger pole as above.
After the technical scheme is adopted, the utility model discloses beneficial effect does: at the plunger rod subassembly during operation, its first lip portion through setting up will be attached to the liquid on the plunger rod subassembly and strike off, sealed liquid and outside air contact have been avoided, and simultaneously, the second through setting up says that lip portion encloses the chamber that holds that forms with first lip portion, wear-resistant bits that twine the production between second lip portion and the plunger rod are accomodate, avoided the wear-resistant bits to get into in the sealed liquid, thereby the sealed effect of plunger rod has been promoted and the long service life of plunger rod has been prolonged, and the plunger rod structure is simple, and the design is ingenious, long service life, sealed effectual advantage.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
FIG. 1 is a schematic view of the present embodiment after being cut;
FIG. 2 is an enlarged view corresponding to detail A in FIG. 1;
fig. 3 is a schematic structural view of the multi-lip seal ring in this embodiment.
Description of reference numerals: 1. a plunger rod; 2. a plunger seat; 3. an inner sleeve of the sealing ring; 31. an inner sleeve body; 32. a first lip portion; 33. a second lip portion; 4. a sealing ring is sleeved outside; 5. an elastic member; 6. a receiving cavity.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications to the present embodiment as required without making a contribution, but all the embodiments are protected by the patent law within the scope of the claims of the present invention.
This embodiment relates to a multi-lip seal, which is primarily intended for use in plunger rod assemblies, as shown in fig. 1-3. Wherein the plunger rod 1 belongs to the prior art and the plunger rod assembly comprises: a plunger rod 1 and a plunger seat 2. It should be noted that the multi-lip sealing ring is not limited to be used for the plunger rod assembly, and may be used alone for other components requiring a sleeving sealing (e.g., sealing column, sealing plug, etc.).
Specifically, as shown in fig. 1 to 3, the multi-lip seal includes: a seal ring inner sleeve 3, a seal ring outer sleeve 4 and an elastic member 5. The sealing ring inner sleeve 3 is sleeved on the plunger rod 1 and is assembled with the plunger rod 1 in a sliding and sealing mode (namely, when the plunger rod 1 moves relative to the multi-lip sealing ring, the plunger rod 1 and the sealing ring are always kept in a sealing state). The sealing ring inner sleeve 3 is used for increasing the sealing length between the sealing ring inner sleeve and the plunger rod 1, so that the sealing effect of the multi-lip sealing ring is improved. In addition, the sealing ring inner sleeve 3 is also used for storing abrasive dust generated when the plunger rod 1 and the sealing ring inner sleeve 3 slide relatively, so that the abrasive dust is prevented from entering sealed liquid. The outer sealing ring sleeve 4 is sleeved on the inner sealing ring sleeve 3 to protect the inner sealing ring sleeve 3. The elastic member 5 is disposed between the inner seal ring sleeve 3 and the outer seal ring sleeve 4, and the elastic member 5 is close to one side (i.e., the right side) of the plunger seat 2. The elastic member 5 is used for locking one side of the sealing ring inner sleeve 3 close to the plunger seat 2 to play a sealing role.
Further, as shown in fig. 1 to 3, the inner sleeve 3 of the seal ring includes: an inner sleeve body 31, a first lip portion 32, and a second lip portion 33.
Specifically, as shown in fig. 1 to 3, the inner sleeve body 31 is fitted to the outer seal ring sleeve 4 through a stepped fitting surface. The first lip portion 32 is disposed on the inner sleeve body 31 on a side away from the elastic member 5 and contacts the plunger rod 1. When the plunger rod 1 slides relative to the sealing ring, the first lip part 32 is used for scraping the residual liquid on the plunger rod 1, so that the liquid attached to the plunger rod 1 is prevented from contacting with air to generate chemical reaction, the wear resistance of the plunger rod 1 or the first lip is reduced, and the service life of the multi-lip sealing ring is further prolonged. The second lip 33 is disposed on the inner sleeve body 31 near the elastic member 5 and contacts the plunger rod 1. The second lip portion 33 and the first lip portion 32 are enclosed to form a containing cavity 6, and the containing cavity 6 is used for collecting abrasive dust generated by friction between the second lip portion 33 and the plunger rod 1.
Preferably, as shown in fig. 1-3, the first lip portion 32 forms a first inner hole, the second lip portion 33 forms a second inner hole, and the diameter of the first inner hole and the diameter of the second inner hole are smaller than the outer diameter of the plunger rod 1. Thereby the good sealing effect is also played when the pressure value is smaller.
Further, as shown in fig. 1 to 3, the inner wall of the first inner hole is a conical surface, and the inner diameter of the side close to the accommodating cavity 6 is larger than the inner diameter of the side far from the accommodating cavity 6 (i.e., the inner diameter of the inner wall of the first inner hole gradually increases from left to right). The first inner hole arranged in this way is sleeved on the plunger rod 1, and the plunger rod 1 is held more and more when the pressure is larger and larger, so that the high-pressure (5MPa) sealing effect is achieved.
Further, as shown in fig. 1 to 3, the inner wall of the second inner hole is a conical surface, and the inner diameter of the side close to the accommodating cavity 6 is smaller than the inner diameter of the side far from the accommodating cavity 6. I.e., the inner diameter of the inner wall of the first bore gradually increases from left to right). The second inner hole arranged in this way is sleeved on the plunger rod 1, and the plunger rod 1 is held more and more when the pressure is larger and larger, so that the high-pressure (5MPa) sealing effect is achieved.
Preferably, as shown in fig. 1-3, the inner sleeve of the sealing ring is made of an elastic plastic member, and the position of the second lip 33 corresponding to the elastic member 5 grips the plunger rod 1 under the elastic force of the elastic member 5, so as to improve the sealing effect of the multi-lip sealing ring.
Preferably, as shown in fig. 1-3, the material of the seal ring housing 4 is 304 stainless steel. The elastic member 5 is a ring spring, and the material of the elastic member 5 is 316 stainless steel.
The working principle of the present embodiment is roughly as follows: the contact area of the multi-lip sealing ring and the plunger rod 1 is fully prolonged by the contact of the first lip opening part 32 and the second lip opening part 33 with the plunger rod 1, so that the sealing effect of the multi-lip sealing ring is improved; and when the plunger rod subassembly worked, it will be attached to the liquid scraping on the plunger rod subassembly through the first lip oral area 32 that sets up, sealed liquid and outside air contact have been avoided, and simultaneously, the second through the setting says that lip oral area 33 encloses the chamber 6 that holds that forms with first lip oral area 32, to the friction winding production abrasive dust between second way lip oral area 33 and the plunger rod 1 accomodate, avoided the abrasive dust to get into in the sealed liquid, it is big to have a sealed section area, it is sealed effectual, long service life, moreover, the steam generator is simple in structure, ingenious advantage.
Based on the above embodiments, the present embodiment also provides a plunger pump, including: plunger rod assembly and the multi-lip sealing ring of the above embodiments. The multi-lip sealing ring is sleeved on a plunger rod 1 of the plunger rod assembly. The plunger pump adopting the technical scheme has the advantages of simple structure, ingenious design, long service life and good sealing effect.
The above description is only for the purpose of illustration and not limitation, and other modifications or equivalent replacements made by those skilled in the art to the technical solution of the present invention should be covered by the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solution of the present invention.
Claims (8)
1. A multi-lip seal for a plunger rod assembly, the plunger rod assembly comprising: plunger rod (1) and plunger seat (2), its characterized in that, many lips sealing washer includes: the sealing ring comprises a sealing ring inner sleeve (3), a sealing ring outer sleeve (4) and an elastic piece (5);
the sealing ring inner sleeve (3) is sleeved on the plunger rod (1) and is assembled with the plunger rod (1) in a sliding and sealing mode, the sealing ring inner sleeve (3) is used for increasing the sealing length between the sealing ring inner sleeve and the plunger rod (1), and abrasive dust generated when the plunger rod (1) and the sealing ring inner sleeve (3) slide relatively is stored;
the outer sealing ring sleeve (4) is sleeved on the inner sealing ring sleeve (3) to protect the inner sealing ring sleeve (3);
elastic component (5) set up in sealing washer endotheca (3) with between sealing washer overcoat (4), just elastic component (5) are close to plunger seat (2) one side, elastic component (5) are used for locking be close to on sealing washer endotheca (3) plunger seat (2) one side to play sealed effect.
2. The multi-lip seal for a plunger rod assembly according to claim 1, wherein the inner seal ring sleeve (3) comprises:
an inner sleeve body (31);
the first lip opening part (32) is arranged on the inner sleeve body (31) and is far away from one side of the elastic part (5) and is in contact with the plunger rod (1), and when the plunger rod (1) slides relative to the sealing ring, the first lip opening part (32) is used for scraping off residual liquid on the plunger rod (1); and the number of the first and second groups,
the second lip opening part (33) is arranged on the inner sleeve body (31), is close to one side of the elastic part (5) and is in contact with the plunger rod (1), the second lip opening part (33) and the first lip opening part (32) are arranged in a surrounding mode to form a containing cavity (6), and the containing cavity (6) is used for collecting abrasive dust generated by friction between the second lip opening part (33) and the plunger rod (1).
3. The multi-lip sealing ring according to claim 2, wherein the first lip portion (32) forms a first inner hole, the second lip portion (33) forms a second inner hole, and the first inner hole and the second inner hole have a hole diameter smaller than the outer diameter of the plunger rod (1).
4. The multi-lip sealing ring according to claim 3, wherein the inner wall of the first inner bore is a conical surface, and the inner diameter of the side close to the accommodating cavity (6) is larger than the inner diameter of the side far from the accommodating cavity (6).
5. The multi-lip sealing ring according to claim 3, wherein the inner wall of the second inner bore is a conical surface, and the inner diameter of the side close to the accommodating cavity (6) is smaller than the inner diameter of the side far from the accommodating cavity (6).
6. The multi-lip sealing ring according to claim 5, wherein the inner sleeve of the sealing ring is made of an elastic plastic member, and the second lip portion (33) is located at a position corresponding to the elastic member (5) and clasps the plunger rod (1) under the elastic force of the elastic member (5).
7. The multi-lip gasket according to claim 6, wherein the gasket housing (4) is made of 304 stainless steel, the elastic member (5) is an annular spring, and the elastic member (5) is made of 316 stainless steel.
8. A plunger pump, comprising: plunger rod assembly and multi-lip sealing ring according to any one of claims 1 to 7 fitted on the plunger rod (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021599494.7U CN212774731U (en) | 2020-08-03 | 2020-08-03 | Multi-lip sealing ring for plunger rod assembly and plunger pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021599494.7U CN212774731U (en) | 2020-08-03 | 2020-08-03 | Multi-lip sealing ring for plunger rod assembly and plunger pump |
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| Publication Number | Publication Date |
|---|---|
| CN212774731U true CN212774731U (en) | 2021-03-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202021599494.7U Active CN212774731U (en) | 2020-08-03 | 2020-08-03 | Multi-lip sealing ring for plunger rod assembly and plunger pump |
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| CN (1) | CN212774731U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111749882A (en) * | 2020-08-03 | 2020-10-09 | 深圳市益思精密五金有限公司 | Multi-lip sealing ring for plunger rod assembly and plunger pump |
-
2020
- 2020-08-03 CN CN202021599494.7U patent/CN212774731U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111749882A (en) * | 2020-08-03 | 2020-10-09 | 深圳市益思精密五金有限公司 | Multi-lip sealing ring for plunger rod assembly and plunger pump |
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