CN111306056A - Piston structure - Google Patents
Piston structure Download PDFInfo
- Publication number
- CN111306056A CN111306056A CN201911382518.5A CN201911382518A CN111306056A CN 111306056 A CN111306056 A CN 111306056A CN 201911382518 A CN201911382518 A CN 201911382518A CN 111306056 A CN111306056 A CN 111306056A
- Authority
- CN
- China
- Prior art keywords
- piston
- ball
- ball bearing
- oil
- oil inlet
- 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.)
- Granted
Links
- 230000002093 peripheral effect Effects 0.000 claims 1
- 239000003921 oil Substances 0.000 abstract description 57
- 239000010687 lubricating oil Substances 0.000 abstract description 16
- 230000007246 mechanism Effects 0.000 abstract description 7
- 230000001050 lubricating effect Effects 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- 230000007306 turnover Effects 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 230000002035 prolonged effect Effects 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
- F04B53/14—Pistons, piston-rods or piston-rod connections
- F04B53/144—Adaptation of piston-rods
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/18—Lubricating
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Details Of Reciprocating Pumps (AREA)
- Compressor (AREA)
Abstract
The invention discloses a piston structure, which comprises a piston and a piston rod, wherein the piston rod is rotationally connected with the piston through a ball bearing, the piston comprises a piston cover and a piston body, the piston cover and the piston body are connected in a matching way to form a closed oil cavity, the ball bearing is embedded at the bottom of the oil cavity, the ball bearing comprises a joint ball, a ball bearing upper shell and a ball bearing lower shell, the joint ball is arranged in a ball cavity formed by the ball bearing upper shell and the ball bearing lower shell, and the piston rod is in sliding fit with the ball cavity, penetrates through the piston cover and is fixedly connected with the joint ball, a first oil inlet and outlet passage is arranged inside the lower end of the piston rod, a second oil inlet and outlet passage is arranged inside the lower end of the joint ball, the upper end of the first oil inlet and outlet passage is communicated with the oil cavity, the lower end of the first oil inlet and outlet passage is communicated with the upper end of the second oil inlet and outlet passage, and the lower end of the second oil inlet and outlet passage is communicated with a fit clearance between the joint ball and the ball bearing lower. By adopting the invention, the lubricating and pressure-bearing characteristics of the ball bearing can be ensured without frequently adding or replacing lubricating oil in a mechanism.
Description
Technical Field
The invention belongs to the technical field of piston pumps, and particularly relates to a piston structure.
Background
At present, mechanical equipment such as an internal combustion engine, a compressor, a pump and the like which are widely used mostly carry out reciprocating motion, and the rotary motion of prime movers such as a rotary motor, a steam turbine, the internal combustion engine and the like is converted into reciprocating linear motion through a traditional crank connecting rod mechanism to drive a piston to carry out reciprocating motion, so that the volume of a sealed working cavity in a cylinder is periodically changed, and the designed working process is finished.
Above-mentioned reciprocating power machinery equipment of tradition simple structure, joint department adopts the bearing to connect usually, to bearing lubrication, is generally the lubricating oil that the bearing was taken when dispatching from the factory, or uses the back and adds lubricating oil regularly, nevertheless to the higher mechanism of leakproofness requirement, can not frequently dismouting add or change lubricating oil, for example: the ball bearing is connected between the piston rod and the piston, and in the reciprocating motion process of the piston, the piston rod drives the joint ball to repeatedly extrude the bearing ball cavity, so that the lubricating oil is required to have not only a lubricating characteristic but also a certain pressure bearing characteristic. Therefore, when the lubricating oil is lost or lost and the lubricating oil cannot be frequently added in a dismounting way, the friction force of the mechanism is increased, the energy consumption is increased, the abrasion of the sliding mating piece is increased, and the service life of the piston is shortened.
Disclosure of Invention
The invention aims to solve the problem of providing a piston structure which can ensure the lubricating and pressure-bearing characteristics of a ball bearing without frequently adding or replacing lubricating oil in a mechanism for assembling and disassembling.
In order to solve the technical problems, one aspect of the present invention provides a piston structure, which includes a piston and a piston rod, wherein the piston rod is rotatably connected to the piston through a ball bearing, the piston includes a piston cover and a piston body, the piston cover and the piston body are cooperatively connected to form a closed oil cavity, the ball bearing is embedded at the bottom of the oil cavity, the ball bearing includes a joint ball, a ball bearing upper shell and a ball bearing lower shell, the joint ball is disposed in a ball cavity formed by the ball bearing upper shell and the ball bearing lower shell and is in sliding fit with the ball cavity, the piston rod passes through the piston cover and is fixedly connected to the joint ball, a first oil inlet and outlet passage is disposed inside the lower end of the piston rod, a second oil inlet and outlet passage is disposed inside the lower end of the joint ball, the upper end of the first oil inlet and outlet passage is communicated with the oil cavity, the lower end of the first oil inlet and outlet passage is communicated with the, and the lower end of the second oil inlet and outlet channel is communicated with the fit clearance between the joint ball and the ball bearing lower shell.
As a preferable scheme of the present invention, a check valve is provided on the first oil inlet/outlet passage.
As a preferable scheme of the present invention, a check valve is provided on the second oil inlet/outlet passage.
As a preferable scheme of the present invention, a sleeve through which the piston rod can pass is fixedly disposed on the piston cover, and a lower end surface of the sleeve abuts against an upper end surface of the ball bearing upper shell.
As a preferable aspect of the present invention, an oil hole communicating with the oil chamber is provided in a circumferential wall of the sleeve.
As the preferable scheme of the invention, the bottom of the oil cavity is provided with a concave cavity matched with the ball bearing, and the ball bearing is embedded in the concave cavity.
In addition, another aspect of the present invention provides a piston pump including the piston structure described in the above.
Compared with the prior art, the piston structure and the piston pump applying the technology have the following beneficial effects:
according to the invention, through the arrangement of the oil cavity, the first oil inlet and outlet channel and the second oil inlet and outlet channel, on one hand, lubricating oil can be stored in the oil cavity, sufficient lubricating oil is ensured in the piston, so that the piston can be conveniently used for a long time, and the lubricating oil is prevented from being added or replaced by frequently assembling and disassembling the mechanism; on the other hand lubricating oil can get into the fit clearance between joint ball and the ball chamber through first business turn over oil duct, second business turn over oil duct in proper order to make the surface of joint ball form the pressure-bearing oil reservoir, guaranteed to form the lubricating film between joint ball and the ball chamber, avoided taking place direct collision between joint ball and the ball chamber, and then improve ball bearing's life. Therefore, the invention has the advantages of simple structure, reliability, stability and long service life.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments will be briefly described below.
Fig. 1 is a schematic structural diagram of a piston structure provided by the invention.
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.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "top", "bottom", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. It should be understood that the terms "first", "second", etc. are used herein to describe various information, but the information should not be limited to these terms, which are only used to distinguish one type of information from another. For example, "first" information may also be referred to as "second" information, and similarly, "second" information may also be referred to as "first" information, without departing from the scope of the present invention.
As shown in fig. 1, the preferred embodiment of a piston structure provided by the present invention includes a piston 1 and a piston rod 2, the piston rod 2 is rotatably connected with the piston 1 through a ball bearing 3, the piston 1 includes a piston cover 11 and a piston body 12, the piston cover 11 and the piston body 12 are cooperatively connected to form a closed oil chamber 4, the ball bearing 3 is embedded at the bottom of the oil chamber 4, the ball bearing 3 includes a joint ball 31, an upper ball bearing shell 32 and a lower ball bearing shell 33, the joint ball 31 is disposed in a ball chamber formed by the upper ball bearing shell 32 and the lower ball bearing shell 33 and slidably engaged with the ball chamber, the piston rod 2 passes through the piston cover 11 and is fixedly connected with the joint ball 31, a first oil inlet and outlet passage 21 is disposed inside the lower end of the piston rod 2, a second oil inlet and outlet passage 34 is disposed inside the lower end of the joint ball 31, the upper end of the first oil inlet and outlet passage 21 is communicated with the oil chamber 4, the lower end of the first oil inlet and outlet passage 21 is communicated with the upper end of the second oil inlet and outlet passage 34, and the lower end of the second oil inlet and outlet passage 34 is communicated with the fit clearance between the joint ball 31 and the ball bearing lower shell 33.
Therefore, through the arrangement of the oil cavity 4, the first oil inlet and outlet channel 21 and the second oil inlet and outlet channel 34, on one hand, lubricating oil can be stored in the oil cavity 4, sufficient lubricating oil is ensured in the piston 1, the piston is convenient to use for a long time, and the lubricating oil is prevented from being added or replaced by frequently assembling and disassembling the mechanism; on the other hand, lubricating oil can enter the fit clearance between the joint ball 31 and the ball cavity through the first oil inlet and outlet passage 21 and the second oil inlet and outlet passage 34 in sequence, so that a pressure-bearing oil layer is formed on the outer surface of the joint ball 31, the lubrication degree between the joint ball 31 and the ball cavity is ensured, direct collision between the joint ball 31 and the ball cavity is avoided, and the service life of the ball bearing 3 is prolonged. Therefore, the invention has the advantages of simple structure, reliability, stability and long service life.
It should be noted that, in the reciprocating motion process of the piston 1, the piston rod 2 drives the joint ball 31 to repeatedly extrude the ball bearing upper shell 32 and the ball bearing lower shell 33, and particularly, when the piston 1 is in a high-pressure discharge state, the piston rod 2 drives the joint ball 31 to move downwards and extrude the ball bearing lower shell 33, a pressure-bearing oil layer on one side of the ball bearing lower shell 33 of the joint ball 31 can flow back to the oil chamber 4 under the action of high pressure, so that the pressure-bearing oil layer disappears, and the joint ball 31 directly collides with the ball bearing lower shell 33 to cause damage. Therefore, in order to prevent the pressurized oil layer of the joint ball 31 on the side of the ball bearing lower shell 33 from flowing back to the oil chamber 4 under high pressure, the check valve 5 is provided on the first oil inlet/outlet passage 21 or the second oil inlet/outlet passage 34.
Illustratively, a sleeve 13 through which the piston rod 2 can pass is fixedly arranged on the piston cover 11, and a lower end surface of the sleeve 13 abuts against an upper end surface of the ball bearing upper shell 32, so as to prevent the joint ball 31 from pulling the ball bearing 3 to be separated from the installation position in the process of pulling the piston 1 upwards by the piston rod 2. In addition, an oil hole 14 communicating with the oil chamber 4 is provided on the circumferential wall of the sleeve 13 to ensure that the oil inlet and outlet passages communicate with the oil chamber 4.
Illustratively, in order to facilitate the positioning and installation of the ball bearing 3, a concave cavity matched with the ball bearing 3 is arranged at the bottom of the oil cavity 4, and the ball bearing 3 is embedded in the concave cavity.
In addition, another aspect of the present invention provides a piston pump including the piston structure described in the above. Since the piston pump includes the piston structure of the above embodiment, all the advantages of the above piston 1 structure are provided, and no description is made here.
The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention, and it is therefore to be understood that the invention is not limited by the scope of the appended claims.
Claims (7)
1. A piston structure is characterized by comprising a piston and a piston rod, wherein the piston rod is rotatably connected with the piston through a ball bearing, the piston comprises a piston cover and a piston body, the piston cover and the piston body are connected in a matched manner to form a closed oil cavity, the ball bearing is embedded at the bottom of the oil cavity, the ball bearing comprises a joint ball, a ball bearing upper shell and a ball bearing lower shell, the joint ball is arranged in a ball cavity formed by the ball bearing upper shell and the ball bearing lower shell and is in sliding fit with the ball cavity, the piston rod penetrates through the piston cover to be fixedly connected with the joint ball, a first oil inlet and outlet passage is arranged inside the lower end of the piston rod, a second oil inlet and outlet passage is arranged inside the lower end of the joint ball, the upper end of the first oil inlet and outlet passage is communicated with the oil cavity, and the lower end of the first oil inlet and outlet passage is communicated with the, and the lower end of the second oil inlet and outlet channel is communicated with the fit clearance between the joint ball and the ball bearing lower shell.
2. The piston structure according to claim 1, wherein a check valve is provided on said first oil inlet/outlet passage.
3. The piston structure according to claim 1, wherein a check valve is provided on said second oil inlet/outlet passage.
4. The piston structure as claimed in claim 1, wherein a sleeve for the piston rod to pass through is fixedly arranged on the piston cover, and the lower end surface of the sleeve is abutted against the upper end surface of the ball bearing upper shell.
5. The piston structure as claimed in claim 4, wherein said sleeve is provided at a peripheral wall thereof with an oil hole communicating with said oil chamber.
6. The piston structure as claimed in claim 1, wherein a bottom of said oil chamber is provided with a concave cavity for fitting said ball bearing, said ball bearing being embedded in said concave cavity.
7. A piston pump, characterized in that it comprises a piston structure according to any one of claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911382518.5A CN111306056B (en) | 2019-12-27 | 2019-12-27 | Piston structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911382518.5A CN111306056B (en) | 2019-12-27 | 2019-12-27 | Piston structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111306056A true CN111306056A (en) | 2020-06-19 |
| CN111306056B CN111306056B (en) | 2024-03-22 |
Family
ID=71154453
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911382518.5A Active CN111306056B (en) | 2019-12-27 | 2019-12-27 | Piston structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111306056B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111911397A (en) * | 2020-07-17 | 2020-11-10 | 西安交通大学 | Piston assembly and application thereof |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2101999A7 (en) * | 1970-09-03 | 1972-03-31 | Bosch | |
| JPS55148985A (en) * | 1979-05-09 | 1980-11-19 | Hitachi Ltd | Reciprocating compressor |
| CN1036445A (en) * | 1988-04-09 | 1989-10-18 | 吉恩·弗雷德里克·梅尔基奥尔 | The piston that is used for internal-combustion engine or similar machinery |
| KR20060130891A (en) * | 2005-06-09 | 2006-12-20 | 삼성광주전자 주식회사 | A reciprocating compressor |
| DE102005039268A1 (en) * | 2005-08-19 | 2007-02-22 | Danfoss Compressors Gmbh | Piston for a refrigeration compressor comprises an oil collector arranged in an inner chamber and having a collecting surface lying next to a piston shroud and directed toward an access opening |
| CN201474957U (en) * | 2009-08-19 | 2010-05-19 | 赵皖东 | Oil-pumping connecting rod |
| WO2014052594A1 (en) * | 2012-09-28 | 2014-04-03 | U.S. Environmental Protection Agency | Ball and socket joint retention for a hydraulic pump/motor |
| CN106401909A (en) * | 2016-09-26 | 2017-02-15 | 加西贝拉压缩机有限公司 | Piston connecting rod device for refrigeration compressor |
| CN211777969U (en) * | 2019-12-27 | 2020-10-27 | 刘大磊 | Piston structure and piston pump using same |
-
2019
- 2019-12-27 CN CN201911382518.5A patent/CN111306056B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2101999A7 (en) * | 1970-09-03 | 1972-03-31 | Bosch | |
| JPS55148985A (en) * | 1979-05-09 | 1980-11-19 | Hitachi Ltd | Reciprocating compressor |
| CN1036445A (en) * | 1988-04-09 | 1989-10-18 | 吉恩·弗雷德里克·梅尔基奥尔 | The piston that is used for internal-combustion engine or similar machinery |
| KR20060130891A (en) * | 2005-06-09 | 2006-12-20 | 삼성광주전자 주식회사 | A reciprocating compressor |
| DE102005039268A1 (en) * | 2005-08-19 | 2007-02-22 | Danfoss Compressors Gmbh | Piston for a refrigeration compressor comprises an oil collector arranged in an inner chamber and having a collecting surface lying next to a piston shroud and directed toward an access opening |
| CN201474957U (en) * | 2009-08-19 | 2010-05-19 | 赵皖东 | Oil-pumping connecting rod |
| WO2014052594A1 (en) * | 2012-09-28 | 2014-04-03 | U.S. Environmental Protection Agency | Ball and socket joint retention for a hydraulic pump/motor |
| CN106401909A (en) * | 2016-09-26 | 2017-02-15 | 加西贝拉压缩机有限公司 | Piston connecting rod device for refrigeration compressor |
| CN211777969U (en) * | 2019-12-27 | 2020-10-27 | 刘大磊 | Piston structure and piston pump using same |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111911397A (en) * | 2020-07-17 | 2020-11-10 | 西安交通大学 | Piston assembly and application thereof |
| CN111911397B (en) * | 2020-07-17 | 2021-08-10 | 西安交通大学 | Piston assembly and application thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111306056B (en) | 2024-03-22 |
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| TA01 | Transfer of patent application right |
Effective date of registration: 20211119 Address after: 21 Shiqiao street, Xiaguan District, Nanjing, Jiangsu 210000 Applicant after: Liu Dalei Applicant after: Guangdong Haiyuan Technology Co.,Ltd. Address before: 21 Shiqiao street, Xiaguan District, Nanjing, Jiangsu 210000 Applicant before: Liu Dalei |
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| GR01 | Patent grant |