CN107461376A - For improving the hydraulic cylinder of sealing property - Google Patents
For improving the hydraulic cylinder of sealing property Download PDFInfo
- Publication number
- CN107461376A CN107461376A CN201710601636.5A CN201710601636A CN107461376A CN 107461376 A CN107461376 A CN 107461376A CN 201710601636 A CN201710601636 A CN 201710601636A CN 107461376 A CN107461376 A CN 107461376A
- Authority
- CN
- China
- Prior art keywords
- sealing ring
- cylinder
- ring
- hydraulic cylinder
- hydraulic
- 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
- 238000007789 sealing Methods 0.000 title claims abstract description 82
- 238000003780 insertion Methods 0.000 claims abstract description 10
- 230000037431 insertion Effects 0.000 claims abstract description 10
- 238000009434 installation Methods 0.000 claims abstract description 3
- 239000000428 dust Substances 0.000 claims description 6
- 230000000694 effects Effects 0.000 abstract description 9
- 238000000034 method Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 230000008602 contraction Effects 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 239000010720 hydraulic oil Substances 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 208000033999 Device damage Diseases 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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
- F15B15/1457—Piston rods
- F15B15/1461—Piston rod 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
- F15B15/08—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
- F15B15/1438—Cylinder to end cap 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
- F15B15/1471—Guiding means other than in the end cap
-
- 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
- F15B15/202—Externally-operated valves mounted in or on the actuator
-
- 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
- F15B2215/00—Fluid-actuated devices for displacing a member from one position to another
- F15B2215/30—Constructional details thereof
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Actuator (AREA)
Abstract
The present invention relates to a kind of hydraulic cylinder for being used to improve sealing property, two ends of cylinder barrel of the hydraulic cylinder are respectively arranged with back cylinder cover and front end housing, and the piston rod in the piston being arranged in cylinder barrel and one end insertion piston middle part, it is characterised in that：Also include the hydraulic pressure influent stream chamber for being arranged on the outer end of front end housing and the seal assembly of inside and being arranged in cylinder barrel, and it is arranged on the back cavity in back cylinder cover, the seal assembly includes the first sealing ring and the second sealing ring of installation on the piston rod, and the guide sleeve on the outside of the second sealing ring and the taper control valve from cylinder barrel in insertion front end housing, the lower region of the taper control valve are respectively arranged with the second sealing ring of insertion and the pipe fitting of hydraulic pressure influent stream intracavitary.The hydraulic cylinder pressure maintaining performance is good, and pressure-bearing is high, and sealing property is preferable, and friction factor is small, and can improve the service life of hydraulic cylinder, so as to reduce production cost, has ideal technique effect.
Description
Technical field
The present invention relates to a kind of hydraulic cylinder for being used to improve sealing property.
Background technology
Hydraulic cylinder is that hydraulic energy is changed into mechanical energy, does straight reciprocating motion（Or oscillating motion）Hydraulic pressure perform member
Part.Its simple in construction, reliable operation, during with it to realize reciprocating motion, deceleration device can be removed from, and there is no drive gap,
Stable movement, therefore be used widely in various mechanical hydraulic systems；It is also power output and piston effective area and
The directly proportional linear motion type executive component of the pressure difference on its both sides；The most popular generally single-piston rod of existing hydraulic cylinder
Hydraulic cylinder, its structure are usually to be made up of the part such as dust ring, guide sleeve, sealing ring, cylinder barrel, piston rod, piston, cylinder cap, and
And existing single-piston-rod hydraulic cylinder only sets one layer of sealing ring on the inside of guide sleeve, in the enterprises such as steel production, a part
Piston rod type hydraulic cylinder is chronically under the very severe operating mode of the environment such as high temperature, high dust, dust-proof in hydraulic cylinder piston rod
Sealing ring, piston rod seals are very easy to damage, easily cause hydraulic cylinder to leak.In daily production, due to leaking frequently
And cause repeatedly to change hydraulic cylinder, to be forced to interrupt production every time, and changing a hydraulic cylinder needs 35 hours.If
More transducer set import sealing ring is expensive, cost is high, delivery cycle length, existing single living so as to cause the efficiency of production to reduce
Although stopper rod hydraulic cylinder can play a role in common operating mode, the sealing of its own is easily reduced, so as to cause zero
Part damage, hydraulic oil the problems such as leaking, therefore, the sealing property of existing single-piston-rod hydraulic cylinder need further lifting and
It is perfect.
Therefore, entitled " a kind of hydraulic cylinder for improving sealing property " of 104235112 No. A bulletins of Chinese patent provides
A kind of improvement project.The hydraulic cylinder includes cylinder body, and cylinder body both ends are sealed and installed with cylinder cap and cylinder bottom, coaxially slided in cylinder cap respectively
Dynamic to install a piston rod, one end of the piston rod is fixed with piston, oil inlet and oil-out is separately installed with cylinder body end walls,
The piston rod is solidly installed by nut and piston, moreover, it is close that three O types are coaxially installed with the outer rim of the piston
Seal；Moreover, the outer rim of the piston electroplates a layers of copper, the thickness of the layers of copper is 0.4mm；Moreover, the cylinder cap is a circle
Post sheath structure, and be coaxially mounted in cylinder body, the cylinder cap one end is coaxially installed with sealing ring, the other end and cylinder body with cylinder body
Between be co-axially mounted a cylindrical sleeve, the cylinder cap outboard end and piston rod are co-axially mounted a dust-proof cushion.The invention improves sealing
The scheme of energy is that three O-ring seals are co-axially mounted in the outer rim of piston, although ensure that close between piston and back cavity
Feng Xing, but the sealing property between influent stream chamber and guide sleeve is not improved, and it is past between influent stream chamber and guide sleeve
It is maximum toward the pressure born, therefore can a kind of hydraulic cylinder of raising sealing property of invention proposition effectively lift-off seal
It can need further to inquire into.
The content of the invention
The mode of double-layer sealing structure is set to solve sealing using on the outside of piston it is an object of the invention to provide a kind of
A kind of hydraulic cylinder for being used to improve sealing property of can be poor, plant equipment service life is low and raises production cost the problems such as.
Two ends of cylinder barrel of hydraulic cylinder for improving sealing property proposed by the invention are respectively arranged with back cylinder cover
And the piston rod in front end housing, and the piston being arranged in cylinder barrel and one end insertion piston middle part, in addition to it is arranged on preceding cylinder
The outer end of lid and the seal assembly of inside and the hydraulic pressure influent stream chamber being arranged in cylinder barrel, and the backflow being arranged in back cylinder cover
Chamber, the seal assembly include the first sealing ring and the second sealing ring of installation on the piston rod, and installed in the second sealing
The guide sleeve in outside and the taper control valve inserted from cylinder barrel in front end housing are enclosed, the lower region of the taper control valve is set respectively
It is equipped with the second sealing ring of insertion and the pipe fitting of hydraulic pressure influent stream intracavitary.
First sealing ring and the second sealing ring are formed by the annular part of nesting, and the annular part includes being located at
The support ring and pressure ring of both sides, and the sealing ring among support ring and pressure ring is nested in, and the support ring, sealing ring and pressure
Pass through inner ring connection mutually nested with the v-depression that outer shroud junction is set between ring.
The side of the guide sleeve is provided with dust ring.
Hydraulics inlet and hydraulic output are respectively arranged with the outside of the front end housing and back cylinder cover.
The proposed by the invention seal assembly for being used to improve in the hydraulic cylinder of sealing property be provided with the first sealing ring and
Second sealing ring, and the second sealing ring is controlled by taper control valve, beneficial effect is：Under normal circumstances, second is close
Seal is not involved in work, and its v-depression opening is in contraction state, only as seal assembly does opposing pistons motion, can rise auxiliary
When helping guide effect, and causing the hydraulic cylinder to leak situations such as loosening occurs in the first sealing ring or damages, taper control valve is beaten
To open, hydraulic oil flows into pipe fitting by taper control valve, then is met by pipe fitting into guide sleeve looping pit with the second sealing ring, from
And the second sealing ring is activated, so that the first sealing ring and the second sealing ring play sealing function simultaneously, to improve hydraulic test
Service life；In addition, first sealing ring and the second sealing ring are formed by support ring, sealing ring and pressure ring nested encryptions,
And make between support ring, sealing ring and pressure ring by the connection mutually nested with the v-depression that outer shroud junction is set of its inner ring
The opening of sealing ring v-depression after being under pressure is obtained to expand respectively inwards and outwards, so as to reach better seal effect, because
Pressure maintaining performance is good under static state for this hydraulic cylinder proposed by the invention, and pressure-bearing is high in motion, and sealing property is preferable, friction
Factor is small, and can improve the service life of hydraulic cylinder, so as to reduce production cost, has ideal technique effect.
Brief description of the drawings：
Accompanying drawing 1 is the cross-sectional view for being used to improve hydraulic cylinder one embodiment of sealing property proposed by the invention；
Accompanying drawing 2 is Fig. 1 ring structure schematic diagram；
Accompanying drawing 3 is the cross-sectional structure schematic diagram of support ring in Fig. 2, sealing ring and pressure ring.
Embodiment：
Referring to Fig. 1 to Fig. 3, these three width accompanying drawings provide one reality of hydraulic cylinder for being used to improve sealing property proposed by the invention
Apply the cross-sectional view of example and the concrete structure schematic diagram of sealing ring.
The hydraulic cylinder includes cylinder barrel 1, and 1 two ends of the cylinder barrel are respectively arranged with back cylinder cover 11 and front end housing 12, with
And the piston rod 21 in the piston 2 in cylinder barrel 1 and the middle part of one end insertion piston 2 is arranged on, in addition to it is arranged on front end housing 12
The seal assembly 3 of outer end and inside and the hydraulic pressure influent stream chamber 13 being arranged in cylinder barrel 1, and it is arranged on returning in back cylinder cover 11
Chamber 14 is flowed, the seal assembly 3 includes the first sealing ring 4 and the second sealing ring 5 being arranged on piston rod 21, and is arranged on
The guide sleeve 31 in the outside of the second sealing ring 5 and the taper control valve 32 inserted from cylinder barrel 1 in front end housing 12, the taper control valve
32 effect is that it is possible to be operated to choose whether to activate the second sealing ring 5 by the switch of itself, and the taper controls
The lower region of valve 32 is respectively arranged with the pipe fitting 33 in the second sealing ring 5 of insertion and hydraulic pressure influent stream chamber 13；The guide sleeve 31
Side be provided with dust ring 34, and the outside of the front end housing 12 and back cylinder cover 11 is respectively arranged with hydraulics inlet 15 and hydraulic pressure
Outlet 16.
First sealing ring 4 is formed with the second sealing ring 5 by nested annular part, and the annular part includes position
Support ring 6 and pressure ring 7 in both sides, and be nested in the sealing ring 8 among support ring 6 and pressure ring 7, and it is the support ring 6, close
V-depression is provided between seal ring 8 and the inner ring of pressure ring 7 61 and outer shroud 62, inner ring 81 and outer shroud 82, inner ring 71 and outer shroud 72
63rd, v-depression 83 and v-depression 73, and pass through mutually nested side between v-depression 63, v-depression 83 and v-depression 73
Formula connects, and the sealing ring effect of this kind of structure is, is adjacent to using v-depression opening to piston rod direction, when what is be under pressure
When, its V-arrangement opening can be made to produce bigger pressure to piston rod direction, and its bigger sealing property of pressure is more preferable,
Effect using the first sealing ring 4 and the double sealing structure of the second sealing ring 5 is, strengthens hydraulic cylinder totality sealing property and effect
Fruit, under normal circumstances, the second sealing ring 5 are not involved in work, and its v-depression opening is in contraction state, is not opened, only with work
Plug assembly 2 does relatively reciprocating motion, and does not seal, and only plays auxiliary guide effect.Led when the first sealing ring 4 loosens or damaged
When causing hydraulic cylinder leakage, taper control valve 32 is opened, hydraulic pressure activates the second sealing ring 5, the He of the first sealing ring 4 by pipe fitting 33
Second sealing ring 5 simultaneously participates in work, improves the sealing property and service life of hydraulic cylinder, greatly reduces hydraulic pressure
Leak situations such as causing device damage, pressure maintaining performance is good under static state for the hydraulic cylinder of this kind of double sealing structure, is held in motion
Press performance stronger, and good seal performance, friction factor is small, is adapted to use in the adverse circumstances such as high temperature, high pressure, high dust.
Claims (4)
1. the hydraulic cylinder for improving sealing property, two ends of cylinder barrel of the hydraulic cylinder are respectively arranged with back cylinder cover and preceding cylinder
Piston rod in the middle part of lid, and the piston being arranged in cylinder barrel and one end insertion piston, it is characterised in that：Also include being arranged on
The outer end of front end housing and the seal assembly of inside and the hydraulic pressure influent stream chamber being arranged in cylinder barrel, and be arranged in back cylinder cover
Back cavity, the seal assembly include the first sealing ring and the second sealing ring of installation on the piston rod, and installed in second
Guide sleeve on the outside of sealing ring and the taper control valve from cylinder barrel in insertion front end housing, the lower region point of the taper control valve
The second sealing ring of insertion and the pipe fitting of hydraulic pressure influent stream intracavitary are not provided with.
2. hydraulic cylinder according to claim 1, it is characterised in that：First sealing ring and the second sealing ring are by nesting
Annular part form, the annular part includes the support ring and pressure ring positioned at both sides, and is nested in support ring and pressure ring
Middle sealing ring, and the v-depression set between the support ring, sealing ring and pressure ring by inner ring and outer shroud junction
Mutually nested connection.
3. hydraulic cylinder according to claim 1, it is characterised in that：The side of the guide sleeve is provided with dust ring.
4. hydraulic cylinder according to claim 1, it is characterised in that：It is respectively arranged with the outside of the front end housing and back cylinder cover
Hydraulics inlet and hydraulic output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710601636.5A CN107461376A (en) | 2017-07-21 | 2017-07-21 | For improving the hydraulic cylinder of sealing property |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710601636.5A CN107461376A (en) | 2017-07-21 | 2017-07-21 | For improving the hydraulic cylinder of sealing property |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107461376A true CN107461376A (en) | 2017-12-12 |
Family
ID=60543878
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710601636.5A Pending CN107461376A (en) | 2017-07-21 | 2017-07-21 | For improving the hydraulic cylinder of sealing property |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107461376A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112609031A (en) * | 2020-12-09 | 2021-04-06 | 本钢板材股份有限公司 | Hydraulic clay gun |
| CN114321088A (en) * | 2021-12-31 | 2022-04-12 | 山东福阳液压科技有限公司 | Front-mounted dumper double-channel sealing hydraulic oil cylinder |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6658987B1 (en) * | 1999-05-19 | 2003-12-09 | Log Hydraulik Gmbh | Sealing device for a piston which is subjected to the action of a pressure medium and which is arranged in a working cylinder |
| JP2010190383A (en) * | 2009-02-20 | 2010-09-02 | Mitsubishi Heavy Ind Ltd | Sealing device for hydraulic cylinder, hydraulic cylinder device, and operation method for the same |
| CN203793361U (en) * | 2014-04-09 | 2014-08-27 | 南车二七车辆有限公司 | Clay and ring spring combined buffer for railway vehicle |
| CN104235112A (en) * | 2013-06-08 | 2014-12-24 | 天津福存液压机械科技有限公司 | Hydraulic cylinder capable of improving sealing property |
| CN206972654U (en) * | 2017-07-21 | 2018-02-06 | 本钢板材股份有限公司 | For improving the hydraulic cylinder of sealing property |
-
2017
- 2017-07-21 CN CN201710601636.5A patent/CN107461376A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6658987B1 (en) * | 1999-05-19 | 2003-12-09 | Log Hydraulik Gmbh | Sealing device for a piston which is subjected to the action of a pressure medium and which is arranged in a working cylinder |
| JP2010190383A (en) * | 2009-02-20 | 2010-09-02 | Mitsubishi Heavy Ind Ltd | Sealing device for hydraulic cylinder, hydraulic cylinder device, and operation method for the same |
| CN104235112A (en) * | 2013-06-08 | 2014-12-24 | 天津福存液压机械科技有限公司 | Hydraulic cylinder capable of improving sealing property |
| CN203793361U (en) * | 2014-04-09 | 2014-08-27 | 南车二七车辆有限公司 | Clay and ring spring combined buffer for railway vehicle |
| CN206972654U (en) * | 2017-07-21 | 2018-02-06 | 本钢板材股份有限公司 | For improving the hydraulic cylinder of sealing property |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112609031A (en) * | 2020-12-09 | 2021-04-06 | 本钢板材股份有限公司 | Hydraulic clay gun |
| CN114321088A (en) * | 2021-12-31 | 2022-04-12 | 山东福阳液压科技有限公司 | Front-mounted dumper double-channel sealing hydraulic oil cylinder |
| CN114321088B (en) * | 2021-12-31 | 2024-02-23 | 山东福阳液压科技有限公司 | Double-channel sealing hydraulic cylinder of front dump truck |
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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: 20171212 |
|
| RJ01 | Rejection of invention patent application after publication |