CN110671316A - High-abrasion-resistance high-sealing piston - Google Patents
High-abrasion-resistance high-sealing piston Download PDFInfo
- Publication number
- CN110671316A CN110671316A CN201911033244.9A CN201911033244A CN110671316A CN 110671316 A CN110671316 A CN 110671316A CN 201911033244 A CN201911033244 A CN 201911033244A CN 110671316 A CN110671316 A CN 110671316A
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- Prior art keywords
- piston
- oval
- elastic
- pit
- pits
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- 238000007789 sealing Methods 0.000 title claims abstract description 33
- 238000005299 abrasion Methods 0.000 claims description 8
- 239000004677 Nylon Substances 0.000 claims description 6
- 229920001971 elastomer Polymers 0.000 claims description 6
- 229920001778 nylon Polymers 0.000 claims description 6
- 229920002635 polyurethane Polymers 0.000 claims description 6
- 239000004814 polyurethane Substances 0.000 claims description 6
- 239000005060 rubber Substances 0.000 claims description 6
- 229910003460 diamond Inorganic materials 0.000 claims 1
- 239000010432 diamond Substances 0.000 claims 1
- 238000003754 machining Methods 0.000 claims 1
- 239000010687 lubricating oil Substances 0.000 abstract description 5
- 230000007547 defect Effects 0.000 abstract description 3
- 238000009434 installation Methods 0.000 abstract description 3
- QNRATNLHPGXHMA-XZHTYLCXSA-N (r)-(6-ethoxyquinolin-4-yl)-[(2s,4s,5r)-5-ethyl-1-azabicyclo[2.2.2]octan-2-yl]methanol;hydrochloride Chemical compound Cl.C([C@H]([C@H](C1)CC)C2)CN1[C@@H]2[C@H](O)C1=CC=NC2=CC=C(OCC)C=C21 QNRATNLHPGXHMA-XZHTYLCXSA-N 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 229910052755 nonmetal Inorganic materials 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000013013 elastic material Substances 0.000 description 2
- 230000001050 lubricating effect Effects 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- 238000005553 drilling Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
Images
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
- F04B53/14—Pistons, piston-rods or piston-rod connections
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
- F05C2225/00—Synthetic polymers, e.g. plastics; Rubber
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
- F05C2225/00—Synthetic polymers, e.g. plastics; Rubber
- F05C2225/02—Rubber
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
- F05C2225/00—Synthetic polymers, e.g. plastics; Rubber
- F05C2225/06—Polyamides, e.g. NYLON
Abstract
The invention discloses a high-wear-resistance high-sealing piston which comprises an elastic piston, wherein a piston rod hole is formed in the center of the elastic piston along the axial direction of the elastic piston, and a concave pit array is arranged on the circumferential surface of the elastic piston, which is in contact with a cylinder sleeve; the pit array is formed by oval pits which are regularly arranged; the minor axis direction of the oval concave pit is parallel to the axial direction of the elastic piston; the ratio of the minor axis to the major axis of the oval pit is 0.5-0.75; the depth of the oval concave pits is 0.3-0.4 times of the minor axis of the oval concave pits. The invention overcomes the defects of poor wear resistance and sealing performance of the existing piston, the elliptical pit is processed on the surface of the elastic piston, the piston is extruded during installation by utilizing the interference fit between the piston and the cylinder sleeve, and the elliptical pit deforms to form the circular pit, thereby increasing the storage capacity of lubricating oil, improving the wear resistance and sealing performance of the piston and prolonging the service life of the piston.
Description
Technical Field
The invention relates to the technical field of pistons, in particular to a high-abrasion-resistance high-sealing piston.
Background
The piston is used as one of core parts in a linear reciprocating motion pump class, such as a slurry pump in the petroleum industry and a drilling pump in the building field. During the working stroke of the piston, the pressure is high, the abrasion between the surface of the piston and the cylinder sleeve is intensified, the lubricating effect between the piston and the cylinder sleeve is poor, and the abrasion of the piston is also intensified.
The piston and the cylinder sleeve are installed in an interference fit mode, and the sealing effect is poor. Meanwhile, the storage capacity of the piston lubricating oil is poor, a stable lubricating oil film cannot be established between the piston and the cylinder sleeve, the lubricating performance is poor, the abrasion of the piston is aggravated, the sealing effect of the piston is poor, and the service life of the piston is shortened. The use demand of non-metal pistons is increasing year by year, especially in the petroleum industry, but the working life of the piston is still not limited due to the wear resistance, the sealing performance and the like of the piston.
Therefore, how to provide a high wear-resistant and high-sealing piston is a problem that needs to be solved by those skilled in the art.
Disclosure of Invention
In view of the above, the invention provides a high-wear-resistance high-sealing piston, aiming at overcoming the defects of poor wear resistance and sealing performance of the existing piston, an elliptical pit is processed on the surface of an elastic piston, the piston is extruded during installation by utilizing interference fit between the piston and a cylinder sleeve, the elliptical pit deforms to form a circular pit, the storage capacity of lubricating oil is increased, the wear resistance and the sealing performance of the piston are improved, and the service life of the piston is prolonged.
In order to achieve the purpose, the invention adopts the following technical scheme:
a high-abrasion-resistance high-sealing piston comprises an elastic piston, wherein a piston rod hole is formed in the center of the elastic piston along the axial direction of the elastic piston, and a concave pit array is arranged on the circumferential surface of the elastic piston, which is in contact with a cylinder sleeve; the pit array is formed by oval pits which are regularly arranged; the minor axis direction of the oval concave pit is parallel to the axial direction of the elastic piston; the ratio of the minor axis to the major axis of the oval pit is 0.5-0.75; the depth of the oval pits is 0.3-0.4 times of the major axis of the oval pits.
Preferably, in the above high-wear-resistance high-sealing piston, the area of the pit array accounts for 15-30% of the circumferential area of the elastic piston.
Preferably, in the high-wear-resistance high-sealing piston, the distribution distance of the long axis directions of the oval concave pits is 1.9-4 times that of the long axis directions of the oval concave pits.
Preferably, in the high-abrasion-resistance high-sealing piston, the distance from the oval pit array to the bottom end of the elastic piston is H, and H is 3-8 times of the minor axis of the oval pit.
Preferably, in the above-mentioned piston with high wear resistance and high sealing performance, the oval concave pits are uniformly distributed in the circumferential direction of the surface of the elastic piston.
Preferably, in the above-mentioned piston with high wear resistance and high sealing performance, the oval concave pits are distributed in a rhombic shape in the circumferential direction of the surface of the elastic piston.
Preferably, in the above-mentioned piston with high wear resistance and high sealing performance, the elliptical pits in the pit array are distributed at equal intervals along the minor axis direction.
Preferably, in the above-mentioned piston with high wear resistance and high sealing performance, the lengths of the major axis and the minor axis of the elliptical pits in the pit array vary along the minor axis direction with equal difference.
Preferably, in the above high wear-resistant high-sealing piston, the pit array provided on the circumferential surface of the elastic piston is processed by one or a combination of a mold, a numerical control method and a laser processing method.
Preferably, in the above-mentioned piston with high wear resistance and high sealing performance, the elastic piston is made of rubber, nylon or polyurethane.
According to the technical scheme, compared with the prior art, the invention discloses the high-wear-resistance high-sealing piston, the invention processes the oval pits on the surface of the elastic piston made of the non-metal elastic material according to the matching relation between the piston and the cylinder sleeve, and utilizes the interference fit between the piston and the cylinder sleeve, the piston is extruded and deformed during installation, and the oval pits on the surface are deformed into the round pits, so that the storage capacity of lubricating oil is increased, the wear of the piston is reduced, the lubrication is facilitated to establish oil film pressure, the wear resistance and the sealing performance of the piston are facilitated to be improved, the service life of the piston is finally prolonged, the replacement period is prolonged, and the economic performance is improved.
The invention relates to a high-wear-resistance high-sealing piston which can be widely applied to pistons made of non-metal elastic materials.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings 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 embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a perspective view of the present invention;
FIG. 2 is a schematic view showing an arrangement in which the elliptical depressions are uniformly distributed in the surface of the elastic piston in example 1;
FIG. 3 is a schematic diagram showing the structure of the elliptical pits on the surface of the elastic piston in a rhombic distribution in example 2;
FIG. 4 is a schematic view showing the structure of the elliptical pits on the surface of the elastic piston distributed at equal intervals along the minor axis direction thereof in example 3;
FIG. 5 is a schematic diagram of the structure of the distribution of the variable-diameter oval pits on the surface of the elastic piston along the minor axis direction at equal intervals in example 4.
The piston comprises a piston 1, a piston 2, an elastic piston 3, a piston rod 4, a pit array 5, an elliptical pit a, an elliptical pit b, an elliptical pit long radius, an L-elliptical pit, an adjacent elliptical pit, an L-elliptical pit, an H-elliptical pit array and an elastic piston bottom, wherein the L-elliptical pit is distributed at intervals in the minor axis direction, the t-adjacent elliptical pit is distributed at intervals in the minor axis direction, and the H-pit array is spaced from the elastic piston bottom.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The embodiment of the invention discloses a high-wear-resistance high-sealing piston, which overcomes the defects of poor wear resistance and poor sealing performance of the existing piston.
Example one
The elliptic pits on the surface of the elastic piston 3 are of an evenly distributed structure.
A high abrasion-resistant high-sealing piston comprises an elastic piston 3, a piston rod hole 4 is formed in the center of the elastic piston 3 along the axial direction of the elastic piston, and a concave pit array 5 is arranged on the circumferential surface of the elastic piston 3, which is in contact with a cylinder sleeve; the pit array 5 is formed by regularly arranged oval pits; the minor axis direction of the oval concave pit is parallel to the axial direction of the elastic piston 3; the ratio of the minor axis to the major axis of the oval concave pit is 0.6; the depth of the oval pits is 0.3 times of the major axis of the oval pits.
In order to further optimize the above solution, the area of the pit array 5 occupies 20% of the circumferential area of the elastic piston 3.
In order to further optimize the technical scheme, the distribution spacing of the long axis direction of the oval pits is 3 times of the long axis direction of the oval pits.
In order to further optimize the technical scheme, the distance between the elliptical pit array 5 and the bottom end of the elastic piston 3 is H, and H is 4 times of the minor axis of the elliptical pit.
In order to further optimize the above technical solution, the oval shaped dimples are evenly distributed in the circumferential direction of the surface of the elastic piston 3.
In order to further optimize the technical scheme, the pit array 5 arranged on the circumferential surface of the elastic piston 3 is processed and manufactured by one or more of the combination of a mould, numerical control and laser processing modes.
In order to further optimize the above technical solution, the elastic piston 3 is made of rubber or nylon or polyurethane.
Example two
The elliptic pits on the surface of the elastic piston 3 adopt a rhombic distribution structure.
A high abrasion-resistant high-sealing piston comprises an elastic piston 3, a piston rod hole 4 is formed in the center of the elastic piston 3 along the axial direction of the elastic piston, and a concave pit array 5 is arranged on the circumferential surface of the elastic piston 3, which is in contact with a cylinder sleeve; the pit array 5 is formed by regularly arranged oval pits; the minor axis direction of the oval concave pit is parallel to the axial direction of the elastic piston 3; the ratio of the minor axis to the major axis of the oval concave pit is 0.6; the depth of the oval pits is 0.4 times the major axis of the oval pits.
In order to further optimize the above solution, the area of the pit array 5 occupies 20% of the circumferential area of the elastic piston 3.
In order to further optimize the technical scheme, the distribution spacing of the long axis direction of the oval pits is 2 times of the long axis direction of the oval pits.
In order to further optimize the technical scheme, the distance between the elliptical pit array 5 and the bottom end of the elastic piston 3 is H, and H is 5 times of the minor axis of the elliptical pit.
In order to further optimize the technical scheme, the oval pits are distributed in a rhombic shape in the circumferential direction of the surface of the elastic piston 3.
In order to further optimize the technical scheme, the pit array 5 arranged on the circumferential surface of the elastic piston 3 is processed and manufactured by one or more of the combination of a mould, numerical control and laser processing modes.
In order to further optimize the above technical solution, the elastic piston 3 is made of rubber or nylon or polyurethane.
EXAMPLE III
The elliptical pits on the surface of the elastic piston 3 are distributed at equal intervals along the minor axis direction.
A high abrasion-resistant high-sealing piston comprises an elastic piston 3, a piston rod hole 4 is formed in the center of the elastic piston 3 along the axial direction of the elastic piston, and a concave pit array 5 is arranged on the circumferential surface of the elastic piston 3, which is in contact with a cylinder sleeve; the pit array 5 is formed by regularly arranged oval pits; the minor axis direction of the oval concave pit is parallel to the axial direction of the elastic piston 3; the ratio of the minor axis to the major axis of the oval concave pit is 0.5; the depth of the oval pits is 0.3 times of the major axis of the oval pits.
In order to further optimize the above solution, the area of the dimple array 5 occupies 15% of the circumferential area of the elastic piston 3.
In order to further optimize the technical scheme, the distribution spacing of the long axis direction of the oval pits is 1.9 times of the long axis of the oval pits.
In order to further optimize the technical scheme, the distance between the elliptical pit array 5 and the bottom end of the elastic piston 3 is H, and H is 3 times of the minor axis of the elliptical pit.
In order to further optimize the technical scheme, the elliptical pits in the pit array 5 are distributed along the minor axis direction at equal intervals, the interval is L, and the difference is t.
In order to further optimize the technical scheme, the pit array 5 arranged on the circumferential surface of the elastic piston 3 is processed and manufactured by one or more of the combination of a mould, numerical control and laser processing modes.
In order to further optimize the above technical solution, the elastic piston 3 is made of rubber or nylon or polyurethane.
Example four
The variable diameter elliptic concave pits on the surface of the elastic piston 3 are distributed along the minor axis direction at equal intervals.
A high abrasion-resistant high-sealing piston comprises an elastic piston 3, a piston rod hole 4 is formed in the center of the elastic piston 3 along the axial direction of the elastic piston, and a concave pit array 5 is arranged on the circumferential surface of the elastic piston 3, which is in contact with a cylinder sleeve; the pit array 5 is formed by regularly arranged oval pits; the minor axis direction of the oval concave pit is parallel to the axial direction of the elastic piston 3; the ratio of the minor axis to the major axis of the oval concave pit is 0.75; the depth of the oval pits is 0.4 times the major axis of the oval pits.
In order to further optimize the above solution, the area of the pit array 5 occupies 30% of the circumferential area of the elastic piston 3.
In order to further optimize the technical scheme, the elliptical pits in the pit array 5 are distributed at equal intervals along the minor axis direction of the elliptical pits.
In order to further optimize the above technical solution, the lengths of the major axis and the minor axis of the elliptical pits in the pit array 5 are varied along the minor axis direction with equal difference.
In order to further optimize the technical scheme, the pit array 5 arranged on the circumferential surface of the elastic piston 3 is processed and manufactured by one or more of the combination of a mould, numerical control and laser processing modes.
In order to further optimize the above technical solution, the elastic piston 3 is made of rubber or nylon or polyurethane.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A high abrasion-resistant high sealing piston is characterized by comprising an elastic piston, wherein a piston rod hole is formed in the center of the elastic piston along the axial direction of the elastic piston, and a concave pit array is arranged on the circumferential surface of the elastic piston, which is in contact with a cylinder sleeve; the pit array is formed by oval pits which are regularly arranged; the minor axis direction of the oval concave pit is parallel to the axial direction of the elastic piston; the ratio of the minor axis to the major axis of the oval pit is 0.5-0.75; the depth of the oval pits is 0.3-0.4 times of the major axis of the oval pits.
2. The piston as claimed in claim 1, wherein said array of dimples is 15-30% of the circumferential area of said elastomeric piston.
3. The piston as claimed in claim 1, wherein the distribution distance of the major axis direction of the oval pits is 1.9-4 times of the major axis of the oval pits.
4. The piston as claimed in claim 1, wherein the distance between the array of oval shaped dimples and the bottom end of the resilient piston is H, which is 3 to 8 times the minor axis of the oval shaped dimple.
5. The piston as claimed in claim 1, wherein said oval depressions are uniformly distributed in the circumferential direction of said elastic piston surface.
6. The piston as claimed in claim 1, wherein said oval depressions are distributed in a diamond shape in the circumferential direction of said elastic piston surface.
7. The piston as claimed in claim 1, wherein said oval dimples of said array are equally spaced along the minor axis of said array.
8. The piston as claimed in claim 8, wherein the length of the major axis and the length of the minor axis of said oval pits in said pit array vary with equal difference along the minor axis.
9. The piston as claimed in claim 1, wherein the array of dimples formed on the circumferential surface of the resilient piston is formed by one or more of die, numerical control, and laser machining.
10. The piston as claimed in claim 1, wherein said elastic piston is made of rubber, nylon or polyurethane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911033244.9A CN110671316A (en) | 2019-10-28 | 2019-10-28 | High-abrasion-resistance high-sealing piston |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911033244.9A CN110671316A (en) | 2019-10-28 | 2019-10-28 | High-abrasion-resistance high-sealing piston |
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| Publication Number | Publication Date |
|---|---|
| CN110671316A true CN110671316A (en) | 2020-01-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911033244.9A Pending CN110671316A (en) | 2019-10-28 | 2019-10-28 | High-abrasion-resistance high-sealing piston |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005108788A1 (en) * | 2004-04-14 | 2005-11-17 | Siemens Aktiengesellschaft | Radial piston pump |
| CN1782358A (en) * | 2004-12-02 | 2006-06-07 | 本田技研工业株式会社 | Piston for internal combustion engine |
| JP2006275002A (en) * | 2005-03-30 | 2006-10-12 | Aisin Seiki Co Ltd | Piston for internal combustion engine |
| CN202006339U (en) * | 2010-06-07 | 2011-10-12 | 江苏大学 | Laser micro-textured piston skirt |
| CN102691654A (en) * | 2012-06-15 | 2012-09-26 | 吉林大学 | Mud pump piston with pits on surface |
| KR20150053044A (en) * | 2013-11-07 | 2015-05-15 | 현대중공업 주식회사 | Piston Pin for Ship Engine |
| CN106481542A (en) * | 2016-12-02 | 2017-03-08 | 三汽车制造有限公司 | Concrete piston and pumping system and concrete pump |
| CN109185119A (en) * | 2018-11-12 | 2019-01-11 | 吉林大学 | A kind of bionical piston of BW-250 type slush pump |
| CN211202277U (en) * | 2019-10-28 | 2020-08-07 | 吉林大学 | High-abrasion-resistance high-sealing piston |
-
2019
- 2019-10-28 CN CN201911033244.9A patent/CN110671316A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005108788A1 (en) * | 2004-04-14 | 2005-11-17 | Siemens Aktiengesellschaft | Radial piston pump |
| CN1782358A (en) * | 2004-12-02 | 2006-06-07 | 本田技研工业株式会社 | Piston for internal combustion engine |
| JP2006275002A (en) * | 2005-03-30 | 2006-10-12 | Aisin Seiki Co Ltd | Piston for internal combustion engine |
| CN202006339U (en) * | 2010-06-07 | 2011-10-12 | 江苏大学 | Laser micro-textured piston skirt |
| CN102691654A (en) * | 2012-06-15 | 2012-09-26 | 吉林大学 | Mud pump piston with pits on surface |
| KR20150053044A (en) * | 2013-11-07 | 2015-05-15 | 현대중공업 주식회사 | Piston Pin for Ship Engine |
| CN106481542A (en) * | 2016-12-02 | 2017-03-08 | 三汽车制造有限公司 | Concrete piston and pumping system and concrete pump |
| CN109185119A (en) * | 2018-11-12 | 2019-01-11 | 吉林大学 | A kind of bionical piston of BW-250 type slush pump |
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Non-Patent Citations (1)
| Title |
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| 孙艺文 等: ""仿生凹坑形钻井泥浆泵活塞磨损寿命试验"", 石油学报, vol. 38, no. 2, 28 February 2017 (2017-02-28), pages 234 - 240 * |
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