CN109630497A - A kind of preload sealing fluid cylinder pressure - Google Patents
A kind of preload sealing fluid cylinder pressure Download PDFInfo
- Publication number
- CN109630497A CN109630497A CN201811456541.XA CN201811456541A CN109630497A CN 109630497 A CN109630497 A CN 109630497A CN 201811456541 A CN201811456541 A CN 201811456541A CN 109630497 A CN109630497 A CN 109630497A
- Authority
- CN
- China
- Prior art keywords
- sealing ring
- sealing
- plunger
- guide sleeve
- preload
- 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.)
- Pending
Links
Classifications
-
- 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
-
- 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
- F15B15/20—Other details, e.g. assembly with regulating devices
Abstract
The invention discloses a kind of preload sealing fluid cylinder pressures, including cylinder body and plunger；The cylinder body is cylindrical in shape and upper end opening, is provided with guide sleeve at the cylinder body upper end opening；The plunger passes through guide sleeve from upper end and protrudes into cylinder body, is provided with sealing device between the plunger and guide sleeve；The sealing device includes the first sealing ring, the second sealing ring and elastic packing mechanism, first sealing ring and the second sealing ring are close to plunger and guide sleeve respectively, and the elastic packing mechanism can make it be close to plunger and guide sleeve respectively by the clearance seal between the first sealing ring and the second sealing ring and to the two pressure.The design applies pretightning force to the first sealing ring and the second sealing ring by elastic packing mechanism, and when it is worn, pretightning force will push the first sealing ring and the second sealing ring compensates, and realizes sealing, improves the service life of hydraulic cylinder.
Description
Technical field
The present invention relates to a kind of hydraulic cylinders, more particularly to a kind of preload sealing fluid cylinder pressure.
Background technique
Plunger and guide sleeve are sealed currently, hydraulic cylinder generallys use sealing ring, but in use, sealing
Circle and plunger may have some abrasions and lead to seal failure occur, influence hydraulic cylinder normal use.
Summary of the invention
The present invention is directed to solve above-mentioned technical problem at least to a certain extent.For this purpose, the present invention propose it is a kind of pre- close
Sealing liquid cylinder pressure.
The technical solution adopted by the present invention to solve the technical problems is: a kind of preload sealing fluid cylinder pressure, including cylinder body and
Plunger；The cylinder body is cylindrical in shape and upper end opening, is provided with guide sleeve at the cylinder body upper end opening；The plunger is worn from upper end
It crosses guide sleeve and protrudes into cylinder body, be provided with sealing device between the plunger and guide sleeve；The sealing device includes first
Sealing ring, the second sealing ring and elastic packing mechanism, first sealing ring and the second sealing ring respectively with plunger and guide sleeve
It is close to, the elastic packing mechanism can make it by the clearance seal between the first sealing ring and the second sealing ring and to the two pressure
It is close to plunger and guide sleeve respectively.
Further, first sealing ring outer ring is provided with the first narrowed outward inclined-plane, elastic packing mechanism packet
Third sealing ring and spring are included, the third sealing ring is arranged between the first sealing ring and the second sealing ring, and the third is close
Seal is provided with the inclined-plane with the first inclined-plane Corresponding matching, and the spring one end is against on third sealing ring and it is pushed to squeeze the
One sealing ring makes the first sealing ring compress plunger.
Further, there are two the first inclined-plane settings and arranged symmetrically, corresponding, the elastic packing mechanism is symmetrical
There are two settings.
Further, the second sealing ring inner ring is provided with the second inwardly narrowed inclined-plane, the third sealing ring setting
There is matching inclined-plane.
Further, there are two second inclined-plane is symmetrical arranged.
Further, the guide sleeve is provided with the holding tank for accommodating sealing device.
Further, the holding tank is provided with the spring for accommodating spring on the side wall at plunger axis direction both ends
Hole, the spring one end are against spring eye bottom, and the other end is against on third sealing ring.
Further, the cylinder body lower end is provided with the gland for sealing.
Further, the cylinder side wall is provided with fluid-through port.
Further, the 4th sealing ring is provided between the plunger and guide sleeve.
It is pre-tightened the beneficial effects of the present invention are: being applied by elastic packing mechanism to the first sealing ring and the second sealing ring
Power, when it is worn, pretightning force will push the first sealing ring and the second sealing ring compensates, and realize sealing, improve hydraulic
The service life of cylinder.
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and examples.
Fig. 1 is mounting structure cross-sectional view of the present invention；
Fig. 2 is enlarged view at the A of Fig. 1.
Specific embodiment
The present invention is described in detail with reference to the accompanying drawings and examples.
Referring to figs. 1 to Fig. 2, a kind of preload sealing fluid cylinder pressure of the invention, including cylinder body 1 and plunger 3.The cylinder body 1 is in
Tubular and upper end opening are provided with guide sleeve 2 at 1 upper end opening of cylinder body, and 1 lower end of cylinder body is provided with for sealing
Gland 8.1 side wall of cylinder body is provided with fluid-through port 7, and fluid-through port 7 is for being filled with hydraulic oil.In order between plunger 3 and guide sleeve 2
Sealing, be provided with the 4th sealing ring 6 between the plunger 3 and guide sleeve 2.Guide sleeve 2 is embedded in the realization of the opening of cylinder body 1 and cylinder body
The sealing of 1 side wall, guide sleeve 2 are provided centrally with centre bore, and the plunger 3 passes through guide sleeve 2 from upper end and protrudes into cylinder body 1,
Plunger 3 can be moved up and down along its axis.Sealing device 4 is provided between the plunger 3 and guide sleeve 2.Cylinder body 1, is led at plunger 3
It is coaxially disposed to set 2 and gland 8.
The sealing device 4 includes the first sealing ring 41, the second sealing ring 42 and elastic packing mechanism, first sealing
Circle 41 and the second sealing ring 42 are close to plunger 3 and guide sleeve 2 respectively, and the elastic packing mechanism can be by 41 He of the first sealing ring
Clearance seal between second sealing ring 42 simultaneously makes it be close to plunger 3 and guide sleeve 2 respectively the two pressure.When plunger 3 and lead
When being worn to set 2, it will usually which generating gap influences leakproofness, but under the action of elastic packing mechanism, can push first close
Seal 41, the second sealing ring 42 compensate, so that the first sealing ring 41 and the second sealing ring 42 tightly touch plunger 3 and guiding
Set 2 realizes sealing.
Lower mask body introduces the structure of sealing device.
First sealing ring, 41 outer ring is provided with the first narrowed outward inclined-plane, and the elastic packing mechanism includes third
Sealing ring 43 and spring 5, the third sealing ring 43 are arranged between the first sealing ring 41 and the second sealing ring 42, the third
Sealing ring 43 is provided with the inclined-plane with the first inclined-plane Corresponding matching, and described 5 one end of spring is against on third sealing ring 43 and pushes
It, which squeezes the first sealing ring 41, makes the first sealing ring 41 compress plunger 3.For third sealing ring 43 under the promotion of spring 5, third is close
The first inclined-plane snug fit on the inclined-plane of seal 43 and the first sealing ring 41, the pressure to internal pressure is applied with to the first sealing ring 41
Power makes the first sealing ring 41 be close to plunger 3.And third sealing ring 43 is also due to the reaction force, presses to the second sealing ring 42
So that the second sealing ring 42 is close to 2 inner wall of guide sleeve and realize sealing, third sealing ring 43 is also sealed with the first sealing ring 41 and second
Circle 42 is close to, and realizes that all sealing stations pre-tighten sealing, improves leakproofness.From foregoing description, it is known that the second sealing ring 42
Section can be the achievable abutting to guide sleeve 2 of rectangle either other shapes.In order to improve leakproofness and active force
Balance, there are two the first inclined-plane settings and is symmetrical arranged, and corresponding, the elastic packing mechanism is symmetrically arranged with two
It is a.The section of first sealing ring 41 is then triangle or trapezoidal as shown in Figure 2.
In order to which the second sealing ring 42 is by bigger clinging force, 42 inner ring of the second sealing ring is provided with inwardly narrowed
Second inclined-plane, the third sealing ring 43 are provided with matching inclined-plane, it is preferred that the second inclined-plane is symmetrical arranged, and second is close
42 section of seal be then be triangle or trapezoidal as shown in Figure 2.The inner ring of the second sealing ring 42 is arranged in first sealing ring 41
It is interior.
The guide sleeve 2 is provided with the holding tank 21 for accommodating sealing device 4, and the holding tank 21 is in 3 axis of plunger
The spring eye 22 for accommodating spring 5 is provided on the side wall at direction both ends, described 5 one end of spring is against 22 bottom of spring eye,
The other end is against on third sealing ring 43.
The above embodiments are merely illustrative of the technical solutions of the present invention and is not intended to limit it, all without departing from the present invention
Any modification of spirit and scope or equivalent replacement, shall fall within the scope of the technical solution of the present invention.
Claims (10)
1. a kind of preload sealing fluid cylinder pressure, it is characterised in that: including cylinder body (1), guide sleeve (2) and plunger (3)；
The cylinder body (1) is cylindrical in shape and upper end opening, is provided with guide sleeve (2) at cylinder body (1) upper end opening；
The plunger (3) passes through guide sleeve (2) from upper end and protrudes into cylinder body (1), between the plunger (3) and guide sleeve (2)
It is provided with sealing device (4)；
The sealing device (4) includes the first sealing ring (41), the second sealing ring (42) and elastic packing mechanism, and described first is close
Seal (41) and the second sealing ring (42) are close to plunger (3) and guide sleeve (2) respectively, and the elastic packing mechanism can be by first
Clearance seal between sealing ring (41) and the second sealing ring (42) simultaneously makes it be close to plunger (3) respectively and be oriented to the two pressure
It covers (2).
2. preload sealing fluid cylinder pressure according to claim 1, it is characterised in that: the first sealing ring (41) outer ring setting
There is the first narrowed outward inclined-plane, the elastic packing mechanism includes third sealing ring (43) and spring (5), the third sealing
It encloses (43) to be arranged between the first sealing ring (41) and the second sealing ring (42), the third sealing ring (43) is provided with and first
The inclined-plane of inclined-plane Corresponding matching, described spring (5) one end are against on third sealing ring (43) and it are pushed to squeeze the first sealing ring
(41) the first sealing ring (41) is made to compress plunger (3).
3. preload sealing fluid cylinder pressure according to claim 2, it is characterised in that: there are two the first inclined-plane settings and right
Claim setting, it is corresponding, the elastic packing mechanism be symmetrical arranged there are two.
4. preload sealing fluid cylinder pressure according to claim 3, it is characterised in that: the second sealing ring (42) inner ring setting
There is the second inwardly narrowed inclined-plane, the third sealing ring (43) is provided with matching inclined-plane.
5. preload sealing fluid cylinder pressure according to claim 4, it is characterised in that: second inclined-plane is symmetrically arranged with two
It is a.
6. preload sealing fluid cylinder pressure according to claim 5, it is characterised in that: the guide sleeve (2) is provided with for holding
Receive the holding tanks (21) of sealing device (4).
7. preload sealing fluid cylinder pressure according to claim 6, it is characterised in that: the holding tank (21) is in plunger (3) axis
The spring eye (22) for accommodating spring (5) is provided on the side wall at line direction both ends, described spring (5) one end is against spring eye
(22) bottom, the other end are against on third sealing ring (43).
8. preload sealing fluid cylinder pressure according to claim 1, it is characterised in that: cylinder body (1) lower end, which is provided with, to be used for
The gland (8) of sealing.
9. preload sealing fluid cylinder pressure according to claim 1, it is characterised in that: cylinder body (1) side wall is provided with logical liquid
Mouth (7).
10. preload sealing fluid cylinder pressure according to claim 1, it is characterised in that: the plunger (3) and guide sleeve (2) it
Between be provided with the 4th sealing ring (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811456541.XA CN109630497A (en) | 2018-11-30 | 2018-11-30 | A kind of preload sealing fluid cylinder pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811456541.XA CN109630497A (en) | 2018-11-30 | 2018-11-30 | A kind of preload sealing fluid cylinder pressure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109630497A true CN109630497A (en) | 2019-04-16 |
Family
ID=66070561
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811456541.XA Pending CN109630497A (en) | 2018-11-30 | 2018-11-30 | A kind of preload sealing fluid cylinder pressure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109630497A (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3732561A1 (en) * | 1987-09-26 | 1989-04-13 | Daimler Benz Ag | LOCKABLE HYDRAULIC CYLINDER |
| CN2849343Y (en) * | 2005-06-14 | 2006-12-20 | 攀枝花新钢钒股份有限公司 | Hydraulic oil cylinder sealer |
| JP2008082513A (en) * | 2006-09-28 | 2008-04-10 | Ckd Corp | Cylinder device |
| CN102384129A (en) * | 2010-08-30 | 2012-03-21 | 龚晓建 | Single-acting plunger type hydraulic cylinder |
| CN102889267A (en) * | 2012-11-16 | 2013-01-23 | 江阴市洪腾机械有限公司 | Self-restoration single-action type hydraulic cylinder |
| CN202883550U (en) * | 2012-07-30 | 2013-04-17 | 邯钢集团邯宝钢铁有限公司 | Improved hydraulic cylinder locking mechanism |
| CN203394921U (en) * | 2013-07-03 | 2014-01-15 | 飞翼股份有限公司 | Plunger hydraulic cylinder |
| CN205277970U (en) * | 2015-12-15 | 2016-06-01 | 浙江华昌液压机械有限公司 | Stable form pneumatic cylinder structure |
| CN105715613A (en) * | 2014-12-04 | 2016-06-29 | 中联重科股份有限公司 | Multi-stage oil cylinder |
| CN106704586A (en) * | 2017-02-28 | 2017-05-24 | 中冶华天南京工程技术有限公司 | Sealing device for changing groove filling rate of sealing ring |
-
2018
- 2018-11-30 CN CN201811456541.XA patent/CN109630497A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3732561A1 (en) * | 1987-09-26 | 1989-04-13 | Daimler Benz Ag | LOCKABLE HYDRAULIC CYLINDER |
| CN2849343Y (en) * | 2005-06-14 | 2006-12-20 | 攀枝花新钢钒股份有限公司 | Hydraulic oil cylinder sealer |
| JP2008082513A (en) * | 2006-09-28 | 2008-04-10 | Ckd Corp | Cylinder device |
| CN102384129A (en) * | 2010-08-30 | 2012-03-21 | 龚晓建 | Single-acting plunger type hydraulic cylinder |
| CN202883550U (en) * | 2012-07-30 | 2013-04-17 | 邯钢集团邯宝钢铁有限公司 | Improved hydraulic cylinder locking mechanism |
| CN102889267A (en) * | 2012-11-16 | 2013-01-23 | 江阴市洪腾机械有限公司 | Self-restoration single-action type hydraulic cylinder |
| CN203394921U (en) * | 2013-07-03 | 2014-01-15 | 飞翼股份有限公司 | Plunger hydraulic cylinder |
| CN105715613A (en) * | 2014-12-04 | 2016-06-29 | 中联重科股份有限公司 | Multi-stage oil cylinder |
| CN205277970U (en) * | 2015-12-15 | 2016-06-01 | 浙江华昌液压机械有限公司 | Stable form pneumatic cylinder structure |
| CN106704586A (en) * | 2017-02-28 | 2017-05-24 | 中冶华天南京工程技术有限公司 | Sealing device for changing groove filling rate of sealing ring |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190416 |
|
| RJ01 | Rejection of invention patent application after publication |