CN109630402B - Self-lubricating wear-resistant oil pump plunger - Google Patents
Self-lubricating wear-resistant oil pump plunger Download PDFInfo
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- CN109630402B CN109630402B CN201910066260.1A CN201910066260A CN109630402B CN 109630402 B CN109630402 B CN 109630402B CN 201910066260 A CN201910066260 A CN 201910066260A CN 109630402 B CN109630402 B CN 109630402B
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- Prior art keywords
- self
- lubricating
- elastic element
- limiting
- plunger
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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
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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
- F04B47/00—Pumps or pumping installations specially adapted for raising fluids from great depths, e.g. well pumps
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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
- F04B53/18—Lubricating
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Details Of Reciprocating Pumps (AREA)
Abstract
The application discloses a self-lubricating wear-resistant oil pump plunger, which relates to the field of oil extraction equipment in an oil field, and comprises a plunger body, an elastic element, a self-lubricating element and a temporary elastic element limiting piece; the self-lubricating element limiting blind holes are distributed on the whole side wall of the plunger body in an array mode, the outer edge of the plunger body, which is radially projected along the plunger body, of the self-lubricating element limiting blind holes is circular, and temporary elastic element limiting part fixing holes are formed in the bottoms of the self-lubricating element limiting blind holes; the self-lubricating element is matched in the limit blind hole of the self-lubricating element, and the self-lubricating element is always contacted with the inner wall of the pump cylinder under the action of the elastic force of the elastic element to form a layer of lubricating film, so that the friction coefficient between the plunger and the pump cylinder is reduced, the self-lubricating film is continuously generated until the self-lubricating element is consumed completely, the wear resistance of the plunger is improved, and the movement resistance of the plunger in the pump cylinder is reduced.
Description
Technical Field
The application relates to the field of oil extraction equipment in oil fields, in particular to a self-lubricating wear-resistant oil pump plunger.
Background
Aiming at environments such as diversified corrosive mediums developed in oil fields, increased sand content, rising water content, increased oil well inclination, deepening pump hanging and the like, oil pump manufacturers purposefully produce various special oil pumps. Through years of development, the pump efficiency of the oil pump is from the original pump detection period of less than 100 days to the current period of more than 1 year. The performance of a pump is good and bad, and depends largely on the quality and performance of the plunger, and many enterprise researchers and manufacturers have recognized the importance of plunger research. Some have studied deeply from the structural design of the plunger process, have achieved very good effects; some researches are started from the plunger surface treatment process, and the surface materials of the plunger and the pump barrel are improved by methods of chromeplating, carburizing or nitriding, surface spraying and the like, so that the wear resistance of the plunger is improved, but the processing cost is higher. Before 2010, a self-fluxing alloy spray-melting technology is successfully applied to an oil field oil pump plunger, a layer of self-fluxing alloy powder is sprayed on the surface of a failed workpiece, then oxygen-acetylene or medium-frequency induction heating is used for remelting the alloy powder, a smooth and flat cladding layer can be formed on the surface of the part, if P, si and other elements with affinity to oxygen are added into alloy elements, the melting point of the alloy can be reduced, the wettability of a base metal can be improved, the single-layer thickness of the cladding layer is generally 1.6mm, and 4 self-fluxing alloy powders of the technology are used, such as nickel base, cobalt base, iron base and tungsten carbide. The technology is not accepted by wide factories because of higher cost; the introduction of the laser cladding technology has the advantages that the surface hardness, the wear resistance and the corrosion resistance of the plunger are stronger, and a better effect is obtained; the AOM special ceramic oil pump and the plunger are proposed, the plunger and the pump barrel are processed by special precision ceramic materials, the toughness of the plunger is higher than that of common ceramics through a phase change toughening mechanism, and the plunger has the characteristics of high melting point, high heat resistance, high chemical stability, high corrosion resistance, high hardness and high wear resistance. However, the high friction coefficient between the plunger and the inner wall of the pump barrel causes difficulty in greatly improving the wear resistance of the plunger, and even if someone tries to improve the wear resistance by reducing the friction coefficient through the surface coating, the low friction coefficient cannot be sustained with the abrasion of the coating, and the lifting effect is limited. Therefore, research to improve the wear resistance of the plunger by continuously reducing the friction system between the plunger and the inner wall of the pump barrel is of great importance.
Disclosure of Invention
In order to improve the wear resistance of the plunger of the oil pump, the application provides the plunger of the oil pump with continuous self-lubricating wear-resistant characteristic, wherein the surface of the plunger is provided with a self-lubricating element limiting blind hole, the self-lubricating element is matched in the self-lubricating element limiting blind hole, and the self-lubricating element is always contacted with the inner wall of the pump cylinder under the elastic action of an elastic element to form a layer of lubricating film, so that the friction coefficient between the plunger and the pump cylinder is reduced, the self-lubricating film is continuously generated until the self-lubricating element is depleted, the wear resistance of the plunger is improved, and the movement resistance of the plunger in the pump cylinder is reduced.
The application adopts the following technical scheme: a self-lubricating wear-resistant oil pump plunger, comprising: a plunger body, an elastic element a self-lubricating element and a temporary elastic element limiter;
the self-lubricating element limiting blind holes are distributed on the whole side wall of the plunger body in an array mode, the outer edge of the plunger body, which is radially projected along the plunger body, of the self-lubricating element limiting blind holes is circular, and temporary elastic element limiting part fixing holes are formed in the bottoms of the self-lubricating element limiting blind holes;
the elastic element comprises a spring body and spring end parts, the spring body is a pressure spring, two end parts of the spring body are respectively connected with one spring end part, and the spring end parts are of circular ring structures; the two spring ends are parallel to each other and perpendicular to the axis of the spring body, and the elastic element is arranged in the self-lubricating element limiting blind hole and fixedly connected with the bottom of the self-lubricating element limiting blind hole;
the self-lubricating element is arranged in the self-lubricating element limiting blind hole, and the first side surface of the self-lubricating element is a cambered surface which is matched with the outer column surface of the plunger body; the second side surface of the self-lubricating element is opposite to the first side surface, and the second side surface of the self-lubricating element is in contact with the elastic element; a temporary elastic element limiting part channel is formed in the center of the self-lubricating element, and a limiting step is formed at the end part of the temporary elastic element limiting part channel;
the temporary elastic element limiting part comprises a fixing part and a limiting part, wherein the fixing part and the limiting part are of an integrated structure, and the fixing part sequentially penetrates through the self-lubricating element and the elastic element to be fixedly connected with a fixing hole of the temporary elastic element limiting part; the shape of the limiting part is matched with the shape of the limiting step and is in tight elastic contact with the limiting step, and the material used for the limiting part softens or decomposes in oil for a period of time and then releases the limit on the elastic element.
The ratio of the diameter of each self-lubricating element limiting blind hole to the spacing between any two adjacent self-lubricating element limiting blind holes is 1: (1.2-3.5).
The elastic element and the bottom of the limit blind hole of the self-lubricating element are fixedly connected through welding or strong adhesion.
The elastic element is connected with the fixing hole of the temporary elastic element limiting part in a threaded or strong-adhesion mode.
Wherein the material of the limiting part is oil-soluble resin and rubber material.
Through the design scheme, the application has the following beneficial effects: the application comprises a plunger body, an elastic element, a self-lubricating element and a temporary elastic element limiting part, wherein the elastic element is used for continuously applying pressure to the self-lubricating element, so that the self-lubricating element is always in close contact with the inner wall of a pump cylinder to generate a continuous self-lubricating film, low-friction reciprocating motion is realized, the working period of the plunger-pump cylinder is prolonged, the single well productivity is increased in oilfield exploitation, and the single well oil extraction cost is reduced.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute a limitation on the application, wherein:
FIG. 1 is a schematic diagram of the overall structure of a self-lubricating wear-resistant oil pump plunger of the present application.
Fig. 2 is a schematic cross-sectional view of a self-lubricating wear-resistant oil pump plunger of the present application.
Fig. 3 is a schematic cross-sectional view of the plunger body according to the present application.
Fig. 4 is a schematic view of the structure of the elastic element in the present application.
Fig. 5 is a drawing showing a stretched state of the elastic member in the present application.
Fig. 6 is a state of the art spring tension.
Fig. 7 is a schematic view of the structure of the self-lubricating element in the present application.
Fig. 8 is a schematic view of a temporary elastic element retainer according to the present application.
The figures are marked as follows: the device comprises a 1-plunger body, a 2-elastic element, a 3-self-lubricating element, a 4-temporary elastic element limiting piece, a 11-self-lubricating element limiting blind hole, a 12-temporary elastic element limiting piece fixing hole and a 21-spring body; 22-spring end parts, 31-limit steps, 32-cambered surfaces, 33-temporary elastic element limit piece channels, 41-fixing parts and 42-limit parts.
Detailed Description
In the description of the present application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and that the features defining "first" and "second" are not necessarily indicative of any order, quantity, or importance, but are merely used to distinguish between different components.
Referring to fig. 1, 2, 3, 4, 7 and 8, the present application provides a self-lubricating wear-resistant oil pump plunger, which comprises a plunger body 1, an elastic element 2, a self-lubricating element 3 and a temporary elastic element limiting member 4, wherein the elastic element 2 is used for continuously applying pressure to the self-lubricating element 3, so that the self-lubricating element 3 is always in close contact with the inner wall of a pump barrel to generate a continuous self-lubricating film, and low-friction reciprocating motion is realized.
The whole side wall of the plunger body 1 is provided with self-lubricating element limit blind holes 11 in an array arrangement, and the spacing ratio of the diameter of each self-lubricating element limit blind hole 11 to any two adjacent self-lubricating element limit blind holes 11 is 1: (1.2-3.5); the self-lubricating element limiting blind hole 11 is distributed on the plunger body 1 along the outer edge of the radial projection of the plunger body 1 to form a circle, and a temporary elastic element limiting part fixing hole 12 is formed in the bottom of the self-lubricating element limiting blind hole 11.
The elastic element 2 comprises a spring body 21 and a spring end 22, the spring body 21 is a pressure spring, two ends of the spring body 21 are respectively connected with the spring end 22, the spring end 22 is of a circular structure, and the spring end 22 and the spring body 21 are made of the same material; the two spring ends 22 are parallel to each other and perpendicular to the axis of the spring body 21, and the elastic element 2 is placed in the self-lubricating element limiting blind hole 11 and is fixedly connected with the bottom of the self-lubricating element limiting blind hole 11 by welding or strong adhesion, fig. 5 shows a drawing state diagram of the elastic element 2 in the application, and fig. 6 shows a drawing state diagram of the spring in the prior art.
The self-lubricating element 3 is arranged in the self-lubricating element limiting blind hole 11, and the first side surface of the self-lubricating element 3 is a cambered surface 32 which is matched with the outer column surface of the plunger body 1; the second side of the self-lubricating element 3 is opposite to the first side, and the second side of the self-lubricating element 3 is in contact with the elastic element 2; a temporary elastic element limiting piece channel 33 is formed in the center of the self-lubricating element 3, and a limiting step 31 is arranged at the end part of the temporary elastic element limiting piece channel 33.
The temporary elastic element limiting piece 4 comprises a fixing part 41 and a limiting part 42, the fixing part 41 and the limiting part 42 are integrally formed, or the fixing part 41 and the limiting part 42 are fixedly connected to form an integral structure, and the fixing part 41 sequentially penetrates through the self-lubricating element 3 and the elastic element 2 to be in threaded or strong-adhesion connection with the temporary elastic element limiting piece fixing hole 12; the shape of the limiting part 42 is adapted to the shape of the limiting step 31 and is in tight elastic contact with the limiting step, so as to limit the elastic element 2, in the application, the material of the limiting part 42 softens or decomposes in oil for a period of time, and then the limitation on the elastic element 2 is released, preferably, the material of the limiting part 42 is oil-soluble resin or rubber material.
The working principle and the process of the application are as follows:
before the plunger enters the pump cylinder and the oil pipe: the limiting part 42 of the temporary elastic element limiting part 4 is tightly and elastically contacted with the limiting step 31, so as to limit the elastic element 2, the self-lubricating element 3 is not contacted with the inner wall of the pump cylinder, and at the moment, the self-lubricating element 3 does not generate a self-lubricating film between the plunger and the pump cylinder.
After the plunger enters the pump cylinder and the oil pipe: the limiting part 42 of the temporary elastic element limiting part 4 softens or breaks down after being immersed in oil, the limitation of the elastic element 2 is eliminated, the self-lubricating element 3 is in pressure contact with the inner wall of the pump cylinder, and at the moment, a continuous self-lubricating film is generated between the plunger and the pump cylinder during the reciprocating motion of the plunger by the self-lubricating element 3.
Claims (5)
1. A self-lubricating wear-resistant oil pump plunger, comprising: the device comprises a plunger body (1), an elastic element (2), a self-lubricating element (3) and a temporary elastic element limiting piece (4);
self-lubricating element limiting blind holes (11) are arrayed on the whole side wall of the plunger body (1), the self-lubricating element limiting blind holes (11) are distributed on the plunger body (1) and are circular along the outer edge of the radial projection of the plunger body (1), and temporary elastic element limiting part fixing holes (12) are formed in the bottom of the self-lubricating element limiting blind holes (11);
the elastic element (2) comprises a spring body (21) and spring end parts (22), the spring body (21) is a pressure spring, two end parts of the spring body (21) are respectively connected with one spring end part (22), and the spring end parts (22) are of circular ring structures; the two spring ends (22) are parallel to each other and perpendicular to the axis of the spring body (21), and the elastic element (2) is arranged in the self-lubricating element limiting blind hole (11) and is fixedly connected with the bottom of the self-lubricating element limiting blind hole (11);
the self-lubricating element (3) is arranged in a self-lubricating element limit blind hole (11), and the first side surface of the self-lubricating element (3) is a cambered surface (32) which is matched with the outer column surface of the plunger body (1); the second side surface of the self-lubricating element (3) is opposite to the first side surface, and the second side surface of the self-lubricating element (3) is in contact with the elastic element (2); a temporary elastic element limiting part channel (33) is formed in the center of the self-lubricating element (3), and a limiting step (31) is formed at the end part of the temporary elastic element limiting part channel (33);
the temporary elastic element limiting part (4) comprises a fixing part (41) and a limiting part (42), wherein the fixing part (41) and the limiting part (42) are of an integrated structure, and the fixing part (41) sequentially penetrates through the self-lubricating element (3) and the elastic element (2) to be fixedly connected with the temporary elastic element limiting part fixing hole (12); the shape of the limiting part (42) is matched with the shape of the limiting step (31) and is in tight elastic contact with the limiting step, and the material used for the limiting part (42) is softened or decomposed after being in oil for a period of time so as to release the limit of the elastic element (2).
2. The self-lubricating wear-resistant oil pump plunger according to claim 1, wherein: the ratio of the diameter of each self-lubricating element limiting blind hole (11) to the spacing of any two adjacent self-lubricating element limiting blind holes (11) is 1: (1.2-3.5).
3. The self-lubricating wear-resistant oil pump plunger according to claim 1, wherein: the elastic element (2) is fixedly connected with the bottom of the self-lubricating element limit blind hole (11) through welding or strong adhesion.
4. The self-lubricating wear-resistant oil pump plunger according to claim 1, wherein: the elastic element (2) is connected with the temporary elastic element limiting part fixing hole (12) in a threaded or strong-adhesion mode.
5. The self-lubricating wear-resistant oil pump plunger according to claim 1, wherein: the material of the limiting part (42) is oil-soluble resin or rubber material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910066260.1A CN109630402B (en) | 2019-01-24 | 2019-01-24 | Self-lubricating wear-resistant oil pump plunger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910066260.1A CN109630402B (en) | 2019-01-24 | 2019-01-24 | Self-lubricating wear-resistant oil pump plunger |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109630402A CN109630402A (en) | 2019-04-16 |
| CN109630402B true CN109630402B (en) | 2023-10-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910066260.1A Active CN109630402B (en) | 2019-01-24 | 2019-01-24 | Self-lubricating wear-resistant oil pump plunger |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB720531A (en) * | 1950-03-16 | 1954-12-22 | David William Edgar Kyle | Improvements in or relating to the lubrication of pistons and cylinders of auxiliaryequipment for internal combustion engines |
| GB861726A (en) * | 1958-08-12 | 1961-02-22 | Kidde Walter Co Ltd | Improvements in or relating to gas release devices |
| CN101832257A (en) * | 2010-05-20 | 2010-09-15 | 丹东市金属密封厂 | Reciprocating oil-well pump plunger sealing device |
| CN104040176A (en) * | 2011-11-16 | 2014-09-10 | 惠而浦股份公司 | Restrictor and production process of a fluid leakage restrictor for aerostatic bearings |
| CN206448935U (en) * | 2016-12-02 | 2017-08-29 | 三一汽车制造有限公司 | Concrete piston and pumping system and concrete pump |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104209891B (en) * | 2013-05-31 | 2016-12-28 | 富泰华工业（深圳）有限公司 | The swelling assembly of detent mechanism and employing thereof |
-
2019
- 2019-01-24 CN CN201910066260.1A patent/CN109630402B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB720531A (en) * | 1950-03-16 | 1954-12-22 | David William Edgar Kyle | Improvements in or relating to the lubrication of pistons and cylinders of auxiliaryequipment for internal combustion engines |
| GB861726A (en) * | 1958-08-12 | 1961-02-22 | Kidde Walter Co Ltd | Improvements in or relating to gas release devices |
| CN101832257A (en) * | 2010-05-20 | 2010-09-15 | 丹东市金属密封厂 | Reciprocating oil-well pump plunger sealing device |
| CN104040176A (en) * | 2011-11-16 | 2014-09-10 | 惠而浦股份公司 | Restrictor and production process of a fluid leakage restrictor for aerostatic bearings |
| CN206448935U (en) * | 2016-12-02 | 2017-08-29 | 三一汽车制造有限公司 | Concrete piston and pumping system and concrete pump |
Non-Patent Citations (2)
| Title |
|---|
| Wear Performance of Bionic Dimpled-Shape Pistons of Mud Pump;Xuejing Cheng;Advances in Materials Science and Engineering * |
| 见聚井有杆抽油泵柱塞下行阻力;何岩峰;石油钻采工艺;参见第117-121 * |
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| CN109630402A (en) | 2019-04-16 |
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