CN113790191A - High-frequency oil cylinder - Google Patents
High-frequency oil cylinder Download PDFInfo
- Publication number
- CN113790191A CN113790191A CN202111267608.7A CN202111267608A CN113790191A CN 113790191 A CN113790191 A CN 113790191A CN 202111267608 A CN202111267608 A CN 202111267608A CN 113790191 A CN113790191 A CN 113790191A
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- CN
- China
- Prior art keywords
- oil
- cylinder
- piston
- frequency
- wall
- 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.)
- Withdrawn
Links
- 239000003921 oil Substances 0.000 claims abstract description 45
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 23
- 230000002706 hydrostatic effect Effects 0.000 claims abstract description 6
- 239000011248 coating agent Substances 0.000 claims description 10
- 238000000576 coating method Methods 0.000 claims description 10
- 239000004809 Teflon Substances 0.000 claims description 3
- 229920006362 Teflon® Polymers 0.000 claims description 3
- 238000007789 sealing Methods 0.000 abstract description 9
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
- F15B15/1447—Pistons; Piston to piston rod assemblies
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
- F15B15/1447—Pistons; Piston to piston rod assemblies
- F15B15/1452—Piston sealings
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Actuator (AREA)
Abstract
The invention relates to a high-frequency oil cylinder which is characterized by comprising a cylinder body; a piston rod, the inner end of which is inserted into the cylinder body; the piston body is fixedly connected with the inner end of the piston rod; the outer wall of the piston body is provided with labyrinth seal, and an oil film gap is formed between the piston body and the inner wall of the cylinder body; the hydraulic oil in the labyrinth seal is suitable for generating hydrostatic support to the oil film clearance, so that an oil film is formed in the oil film clearance, and the hydraulic oil in the rod cavity and the rodless cavity is blocked from flowing. According to the high-frequency oil cylinder, a sealing ring on the traditional piston body is omitted, the friction force between the piston body and the inner wall of the cylinder body is reduced, the expansion frequency of the piston rod is greatly improved, and the expansion frequency of the piston rod can reach more than 50 Hz.
Description
Technical Field
The invention relates to a high-frequency oil cylinder.
Background
For some special industries, such as the steel-making industry, a high-frequency oil cylinder is needed;
in the existing common oil cylinder, a sealing ring is arranged on a piston, the circulation of hydraulic oil between a rod cavity and a rodless cavity in the oil cylinder is blocked by the sealing ring, when a piston rod in the oil cylinder moves in an extending mode, oil enters the rodless cavity, oil exits from the rod cavity, the piston moves together with the sealing ring, and due to the friction force between the sealing ring and the inner wall of a cylinder body, the moving speed of the piston is influenced, the telescopic frequency of the piston rod is influenced, so that the telescopic frequency of the piston rod in the existing common oil cylinder is 0.001-0.2 Hz, and the frequency cannot be changed all the time.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the defects of the prior art are overcome, the high-frequency oil cylinder is provided, and the problem that the telescopic frequency of a piston rod in the existing oil cylinder is low is solved.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a high-frequency oil cylinder is provided, which comprises
A cylinder body;
a piston rod, the inner end of which is inserted into the cylinder body;
the piston body is fixedly connected with the inner end of the piston rod; the outer wall of the piston body is provided with labyrinth seal, and an oil film gap is formed between the piston body and the inner wall of the cylinder body;
the hydraulic oil in the labyrinth seal is suitable for generating hydrostatic support to the oil film clearance, so that an oil film is formed in the oil film clearance, and the hydraulic oil in the rod cavity and the rodless cavity is blocked from flowing.
Furthermore, the outer wall of the piston body is provided with a coating, and the piston body is supported by the coating and the inner wall of the cylinder body.
Furthermore, the coating is made of Teflon.
Furthermore, the size of the radial gap is 0.05-0.09 mm.
Further, the hydraulic oil in the cylinder body is 46# hydraulic oil.
The invention has the beneficial effects that:
according to the high-frequency oil cylinder, a sealing ring on the traditional piston body is omitted, the friction force between the piston body and the inner wall of the cylinder body is reduced, the expansion frequency of the piston rod is greatly improved, and the expansion frequency of the piston rod can reach more than 50 Hz.
The hydrostatic supporting force generated by the hydraulic oil in the labyrinth seal to the oil film gap enables an oil film to be formed in the oil film gap, the hydraulic oil in the rod cavity and the rodless cavity in the cylinder body is blocked from flowing through the oil film, and the piston body can still form a sliding seal structure with the inner wall of the cylinder body.
Drawings
The invention is further described below with reference to the accompanying drawings.
FIG. 1 is a schematic structural view of a high-frequency oil cylinder of the present invention;
the oil-gas separator comprises a cylinder body 1, a cylinder body 2, a piston rod 3, a piston body 31, a labyrinth seal 4, a coating 5 and an oil film gap.
Detailed Description
The invention will now be further described with reference to the accompanying drawings. These drawings are simplified schematic diagrams only illustrating the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.
As shown in FIG. 1, a high frequency oil cylinder comprises
A cylinder body 1;
a piston rod 2, the inner end of which is inserted into the cylinder body 1;
the piston body 3 is fixedly connected with the inner end of the piston rod 2; the outer wall of the piston body 3 is provided with a labyrinth seal 31, and an oil film gap 5 is formed between the piston body 3 and the inner wall of the cylinder body 1;
the hydraulic oil in the labyrinth seal 31 is suitable for generating hydrostatic support to the oil film gap 5, so that an oil film is formed in the oil film gap 5, and the hydraulic oil in the rod cavity and the rodless cavity is blocked from flowing.
Specifically, as an alternative embodiment in this embodiment, the outer wall of the piston body 3 is provided with a coating 4, and the piston body 3 is supported by the coating 4 and the inner wall of the cylinder body 1.
In this embodiment, the coating 4 is made of teflon.
Specifically, as an optional implementation manner in this embodiment, the size of the oil film gap 5 is 0.05-0.09 mm.
In this embodiment, the oil film gap 5 is 0.06 mm.
Specifically, as an optional implementation manner in this embodiment, 46# hydraulic oil is used as the hydraulic oil in the cylinder 1.
The working principle of the high-frequency oil cylinder is as follows:
the sealing ring on the piston body 3 is eliminated, the labyrinth seal 31 is arranged on the outer wall of the piston body 3 instead, the gap between the outer wall of the piston body 3 and the inner wall of the cylinder body 1 is controlled at the same time, because the labyrinth seal 31 can store hydraulic oil, the part of hydraulic oil is immobile and is static, therefore, the part of hydraulic oil has larger pressure than the flowing hydraulic oil (the flow rate is larger, the pressure is smaller, the flow rate is smaller, and the pressure is larger), the hydrostatic supporting force of the hydraulic oil in the labyrinth seal 31 is applied to the gap, so that an oil film is formed in the gap, the oil film gap 5 can obstruct the circulation of the hydraulic oil in a rod cavity and a rodless cavity, so that the piston body 3 can play a normal sealing supporting role, meanwhile, the piston body 3 is not provided with the sealing ring, the friction force between the piston body 3 and the cylinder body 1 is very small, and the piston body 3 is only in sliding fit with the inner wall of the cylinder body 1 through the oil film, the friction force is close to 0, so the piston body 3 can be quickly pushed to finally drive the piston rod 2 to quickly move, and the high-frequency expansion and contraction of the piston rod 2 are realized.
In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (5)
1. A high-frequency oil cylinder is characterized by comprising
A cylinder body;
a piston rod, the inner end of which is inserted into the cylinder body;
the piston body is fixedly connected with the inner end of the piston rod; the outer wall of the piston body is provided with labyrinth seal, and an oil film gap is formed between the piston body and the inner wall of the cylinder body;
the hydraulic oil in the labyrinth seal is suitable for generating hydrostatic support to the oil film clearance, so that an oil film is formed in the oil film clearance, and the hydraulic oil in the rod cavity and the rodless cavity is blocked from flowing.
2. The high-frequency cylinder according to claim 1,
the outer wall of the piston body is provided with a coating, and the piston body is supported by the coating and the inner wall of the cylinder body.
3. The high-frequency cylinder according to claim 2,
the coating is made of Teflon.
4. The high-frequency cylinder according to claim 1,
the size of the radial gap is 0.05-0.09 mm.
5. The high-frequency cylinder according to claim 1,
and the hydraulic oil in the cylinder body adopts No. 46 hydraulic oil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111267608.7A CN113790191A (en) | 2021-10-29 | 2021-10-29 | High-frequency oil cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111267608.7A CN113790191A (en) | 2021-10-29 | 2021-10-29 | High-frequency oil cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113790191A true CN113790191A (en) | 2021-12-14 |
Family
ID=78878332
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111267608.7A Withdrawn CN113790191A (en) | 2021-10-29 | 2021-10-29 | High-frequency oil cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113790191A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0351505A (en) * | 1989-07-18 | 1991-03-05 | Eiko Sokki Kk | Air cylinder |
| KR19990085065A (en) * | 1998-05-13 | 1999-12-06 | 안승일 | Oil leakage prevention structure of hydraulic cylinder |
| CN203176053U (en) * | 2013-04-12 | 2013-09-04 | 泸州市江阳区红岩机械有限公司 | Gap-sealed oil cylinder |
| CN204458256U (en) * | 2015-02-03 | 2015-07-08 | 沈阳远大压缩机股份有限公司 | A kind of piston with teflon coatings |
| KR101598330B1 (en) * | 2015-03-19 | 2016-03-14 | 한국기계연구원 | Hydrostatic Servo Actuator |
| RU199474U1 (en) * | 2020-04-24 | 2020-09-02 | Общество с ограниченной ответственностью "Уральский инжиниринговый центр" | Double Acting Hydraulic Cylinder with Hydrostatic Guides |
| CN216199461U (en) * | 2021-10-29 | 2022-04-05 | 江苏军宏机械有限公司 | High-frequency oil cylinder |
-
2021
- 2021-10-29 CN CN202111267608.7A patent/CN113790191A/en not_active Withdrawn
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0351505A (en) * | 1989-07-18 | 1991-03-05 | Eiko Sokki Kk | Air cylinder |
| KR19990085065A (en) * | 1998-05-13 | 1999-12-06 | 안승일 | Oil leakage prevention structure of hydraulic cylinder |
| CN203176053U (en) * | 2013-04-12 | 2013-09-04 | 泸州市江阳区红岩机械有限公司 | Gap-sealed oil cylinder |
| CN204458256U (en) * | 2015-02-03 | 2015-07-08 | 沈阳远大压缩机股份有限公司 | A kind of piston with teflon coatings |
| KR101598330B1 (en) * | 2015-03-19 | 2016-03-14 | 한국기계연구원 | Hydrostatic Servo Actuator |
| RU199474U1 (en) * | 2020-04-24 | 2020-09-02 | Общество с ограниченной ответственностью "Уральский инжиниринговый центр" | Double Acting Hydraulic Cylinder with Hydrostatic Guides |
| CN216199461U (en) * | 2021-10-29 | 2022-04-05 | 江苏军宏机械有限公司 | High-frequency oil cylinder |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20211214 |