CN207421016U - A kind of double sealing structure hydraulic cylinder - Google Patents
A kind of double sealing structure hydraulic cylinder Download PDFInfo
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- CN207421016U CN207421016U CN201721240124.2U CN201721240124U CN207421016U CN 207421016 U CN207421016 U CN 207421016U CN 201721240124 U CN201721240124 U CN 201721240124U CN 207421016 U CN207421016 U CN 207421016U
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- seals
- hydraulic cylinder
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Abstract
The utility model discloses a kind of double sealing structure hydraulic cylinders, including gray iron and piston rod, cylinder cap is mounted on cylinder body, piston rod is mounted on cylinder cap, the inside of cylinder cap is equipped with the first sealing structure and second seals structure, oil leak hole, oil leak hole communication seals switching construction are equipped on cylinder cap between first sealing structure and second seals structure.The utility model can not only efficiently solve the pocketed oil problem between two seals, the stressing conditions of second sealing ring can also be improved, make it before first of sealing is not failed, it works in the unloaded state always, work abrasion are greatly reduced, so as to effectively extend the service life of second sealing.After first of sealing ring fails, the leakage oil circuit of double containment switching device cut-out failure sealing, second starts carry load work to sealing.Finally the reliability of sealing system and the performance of hydraulic cylinder and service life are improved to greatest extent.
Description
Technical field
The utility model is related to hydraulic cylinder, more particularly to a kind of double sealing structure hydraulic cylinder.
Background technology
In heavy duty equipment, hydraulic cylinder is main executive component, and the reliability and service life of work are crucial
Depending on sealing system.Under high pressure, big flow occasion, bar, which is used, seals generally use two seals, two seals and single track
The reliability for greatly improving sealing system is compared in sealing, and improves the service life of executing agency, but two seals
Use there is also it is serious the defects of, first, various forms of sealing rings or its is residual with the sealing ring under form different conditions
Oily pumpback ability will not be identical, so this may result in occurring between two seals pocketed oil and builds the pressure phenomenon.Pocketed oil pressure is very
Cylinder system pressure can be extremely higher than, cause the serious extrusion deformation of sealing ring.So two seals while carry load work, pass through simultaneously
It is worn away by work.Second, being sealed by special construction, pocketed oil phenomenon can be avoided, but two seals can not be avoided to be pressurized simultaneously,
In this case two seals bear work abrasion simultaneously, do not have the effect of due extension hydraulic cylinder service life, even
Reaction can be played.These defects cause the performance of hydraulic cylinder and service life that can not further improve.
Utility model content
The purpose of this utility model is that providing a kind of double sealing structure hydraulic cylinder, twice can be not only efficiently solved
Pocketed oil problem between sealing ring can also improve the stressing conditions of second sealing ring, it is made not fail in first of sealing
Before, work in the unloaded state always, greatly reduce work abrasion, so as to effectively extend making for second sealing
Use the service life.After first of sealing ring fails, the leakage oil circuit of double containment switching device cut-out failure sealing, second opens to sealing
Beginning carry load work.Finally the reliability of sealing system and the performance of hydraulic cylinder are improved to greatest extent and using the longevity
Life.
In order to solve the above technical problems, the utility model adopts the following technical scheme：
A kind of double sealing structure hydraulic cylinder, including gray iron and piston rod, cylinder cap is mounted on cylinder body, piston rod peace
On cylinder cap, the inside of cylinder cap is equipped with the first sealing structure and second seals structure, the first sealing structure and second on cylinder cap
Oil leak hole, oil leak hole communication seals switching construction are equipped between sealing structure.
In a kind of foregoing double sealing structure hydraulic cylinder, sealing switching construction include fittings body, throttling valve core, gasket and
Elastic construction, fittings body have centre bore, and the one of centre bore is terminated with hose assembly, and the other end has slot position；It is throttling valve core, close
Packing and elastic construction are located in the slot position, and between gasket and throttling valve core, throttling valve core is equipped with elastic construction
Throttle orifice, throttle orifice is towards gasket.
In a kind of foregoing double sealing structure hydraulic cylinder, clamp spring is equipped in the slot position, one end of throttling valve core contradicts card
Spring, the other end contradict elastic construction.
In a kind of foregoing double sealing structure hydraulic cylinder, the elastic construction is disc spring.
In a kind of foregoing double sealing structure hydraulic cylinder, first sealing structure is this spy's envelope, and second seals structure is Y
Shape circle, this spy's envelope is between oil leak hole and cylinder body.
In a kind of foregoing double sealing structure hydraulic cylinder, the fittings body is integral into T-shaped, the bottom side tool at the top of fittings body
There is mounting groove, O-ring is equipped in mounting groove, O-ring one side contradicts fittings body, and opposite side contradicts cylinder cap.
In a kind of foregoing double sealing structure hydraulic cylinder, the throttling valve core into cylindric, close to elasticity tie by throttling valve core
One end of structure has locating slot, and one end of the elastic construction is located in the locating slot.
Compared with prior art, the utility model can not only efficiently solve the pocketed oil problem between two seals,
The stressing conditions of second sealing ring can also be improved, make it before first of sealing is not failed, always in the unloaded state
Work greatly reduces work abrasion, so as to effectively extend the service life of second sealing.In first of sealing ring
After failure, the leakage oil circuit of double containment switching device cut-out failure sealing, second starts carry load work to sealing.Final maximum limit
Improve the reliability of sealing system and the performance of hydraulic cylinder and service life degree.
Description of the drawings
Fig. 1 is a kind of structure diagram of embodiment of the utility model；
Fig. 2 is the partial enlarged view of Fig. 1.
Reference numeral：1- fittings bodies, 2-O type circles, 3- throttling valve cores, 4- clamp springs, 5- elastic constructions, 6- throttle orifices, 7- are close
Packing, 8- hose assemblies, 9- sealing switching constructions, 10- oil leak holes, the first sealing structures of 11-, 12- second seals structures, 13-
Piston rod, 14- cylinder bodies, 15- cylinder caps, 16- centre bores.
The utility model is further described with reference to the accompanying drawings and detailed description.
Specific embodiment
The embodiment 1 of the utility model：As depicted in figs. 1 and 2, a kind of double sealing structure hydraulic cylinder, including cylinder body 14, cylinder
Lid 15 and piston rod 13, cylinder cap 15 are mounted on cylinder body 14, and piston rod 13 is mounted on cylinder cap 15, which is characterized in that cylinder cap 15
Inside be equipped with the first sealing structure 11 and second seals structure 12, the first sealing structure 11 and second seals structure on cylinder cap 15
Oil leak hole 10,10 communication seals switching construction 9 of oil leak hole are equipped between 12.
Sealing switching construction 9 includes fittings body 1, throttling valve core 3, gasket 7 and elastic construction 5, and fittings body 1 has center
Hole 16, the one of centre bore 16 is terminated with hose assembly 8, and the other end has slot position；Throttling valve core 3, gasket 7 and elastic construction 5
In the slot position, for elastic construction 5 between gasket 7 and throttling valve core 3, throttling valve core 3 is equipped with throttle orifice 6, section
Discharge orifice 6 is towards gasket 7.
Clamp spring 4 is equipped in the slot position, one end of throttling valve core 3 contradicts clamp spring 4, and the other end contradicts elastic construction 5.It is described
Elastic construction 5 is disc spring.For the fittings body 1 integral into T-shaped, the bottom side at 1 top of fittings body has mounting groove, is set in mounting groove
There is O-ring 2,2 one side of O-ring contradicts fittings body 1, and opposite side contradicts cylinder cap 15.The throttling valve core 3 is into cylindric, throttle valve
Core 3 has locating slot close to one end of elastic construction 5, and one end of the elastic construction 5 is located in the locating slot.
Embodiment 2：As depicted in figs. 1 and 2, a kind of double sealing structure hydraulic cylinder, including cylinder body 14, cylinder cap 15 and piston rod
13, cylinder cap 15 is mounted on cylinder body 14, and piston rod 13 is mounted on cylinder cap 15, which is characterized in that the inside of cylinder cap 15 is equipped with the
One sealing structure 11 and second seals structure 12 are equipped between first sealing structure 11 and second seals structure 12 on cylinder cap 15
Oil leak hole 10,10 communication seals switching construction 9 of oil leak hole.
Sealing switching construction 9 includes fittings body 1, throttling valve core 3, gasket 7 and elastic construction 5, and fittings body 1 has center
Hole 16, the one of centre bore 16 is terminated with hose assembly 8, and the other end has slot position；Throttling valve core 3, gasket 7 and elastic construction 5
In the slot position, for elastic construction 5 between gasket 7 and throttling valve core 3, throttling valve core 3 is equipped with throttle orifice 6, section
Discharge orifice 6 is towards gasket 7.
Clamp spring 4 is equipped in the slot position, one end of throttling valve core 3 contradicts clamp spring 4, and the other end contradicts elastic construction 5.It is described
First sealing structure 11 is this spy's envelope, and second seals structure 12 is Y shape circle, this spy's envelope is between oil leak hole 10 and cylinder body 14.
For the fittings body 1 integral into T-shaped, the bottom side at 1 top of fittings body has mounting groove, and O-ring 2, O-ring 2 are equipped in mounting groove
One side contradicts fittings body 1, and opposite side contradicts cylinder cap 15.The throttling valve core 3 is into cylindric, and throttling valve core 3 is close to elastic construction
5 one end has locating slot, and one end of the elastic construction 5 is located in the locating slot.
Embodiment 3：As depicted in figs. 1 and 2, a kind of double sealing structure hydraulic cylinder, including cylinder body 14, cylinder cap 15 and piston rod
13, cylinder cap 15 is mounted on cylinder body 14, and piston rod 13 is mounted on cylinder cap 15, which is characterized in that the inside of cylinder cap 15 is equipped with the
One sealing structure 11 and second seals structure 12 are equipped between first sealing structure 11 and second seals structure 12 on cylinder cap 15
Oil leak hole 10,10 communication seals switching construction 9 of oil leak hole.
Sealing switching construction 9 includes fittings body 1, throttling valve core 3, gasket 7 and elastic construction 5, and fittings body 1 has center
Hole 16, the one of centre bore 16 is terminated with hose assembly 8, and the other end has slot position；Throttling valve core 3, gasket 7 and elastic construction 5
In the slot position, for elastic construction 5 between gasket 7 and throttling valve core 3, throttling valve core 3 is equipped with throttle orifice 6, section
Discharge orifice 6 is towards gasket 7.Throttling valve core 3 and the mating surface of gasket 7 need to ensure that roughness is less than 0.0032mm.
Clamp spring 4 is equipped in the slot position, one end of throttling valve core 3 contradicts clamp spring 4, and the other end contradicts elastic construction 5.It is described
Elastic construction 5 is disc spring.First sealing structure 11 is this spy's envelope, and second seals structure 12 is Y shape circle, this spy's envelope, which is located at, lets out
Between oilhole 10 and cylinder body 14.For the fittings body 1 integral into T-shaped, the bottom side at 1 top of fittings body has mounting groove, mounting groove
Interior to be equipped with O-ring 2,2 one side of O-ring contradicts fittings body 1, and opposite side contradicts cylinder cap 15.The throttling valve core 3 is into cylindric, section
Flow valve core 3 has locating slot close to one end of elastic construction 5, and one end of the elastic construction 5 is located in the locating slot.
A kind of operation principle of the embodiment of the utility model：In bar sealing, before first of sealing ring damages, just
The hydraulic oil often leaked returns to fuel tank by the throttle orifice stream 6 of the mechanism, so can effectively solve between two seals
Pocketed oil problem, while also avoid second sealing ring compressive deformation, second sealing ring is under low abrasion state at this time
Work.Once first of seal failure, a large amount of hydraulic oil can leak in the fit clearance from first of sealing with piston rod 13, this
When Leakage Energy throttling valve core 3 can be promoted to compress disc spring, and then compress gasket 7, finally cut off throttle circuit, mechanism closing is in
Packing state, second sealing start normal carry load work.Mechanism is mounted on the type of attachment of screw thread on cylinder cap, and and cylinder
End face seal is used between lid.
Claims (7)
1. a kind of double sealing structure hydraulic cylinder, including cylinder body (14), cylinder cap (15) and piston rod (13), cylinder cap (15) is mounted on cylinder
On body (14), piston rod (13) is mounted on cylinder cap (15), which is characterized in that the inside of cylinder cap (15) is equipped with the first sealing structure
(11) and second seals structure (12), it is equipped with and lets out between the first sealing structure (11) and second seals structure (12) on cylinder cap (15)
Oilhole (10), oil leak hole (10) communication seals switching construction (9).
2. a kind of double sealing structure hydraulic cylinder according to claim 1, which is characterized in that sealing switching construction (9) includes
Fittings body (1), throttling valve core (3), gasket (7) and elastic construction (5), fittings body (1) have centre bore (16), centre bore
(16) one is terminated with hose assembly (8), and the other end has slot position；Throttling valve core (3), gasket (7) and elastic construction (5) position
In in the slot position, elastic construction (5) is located between gasket (7) and throttling valve core (3), and throttling valve core (3) is equipped with throttling
Hole (6), throttle orifice (6) is towards gasket (7).
3. a kind of double sealing structure hydraulic cylinder according to claim 2, which is characterized in that clamp spring is equipped in the slot position
(4), one end of throttling valve core (3) contradicts clamp spring (4), and the other end contradicts elastic construction (5).
4. a kind of double sealing structure hydraulic cylinder according to claim 2, which is characterized in that the elastic construction (5) is dish
Spring.
A kind of 5. double sealing structure hydraulic cylinder according to claim 3 or 4, which is characterized in that first sealing structure
(11) it is this spy's envelope, second seals structure (12) is Y shape circle, this spy's envelope is between oil leak hole (10) and cylinder body (14).
6. a kind of double sealing structure hydraulic cylinder according to claim 5, which is characterized in that the fittings body (1) is integral into T
Font, the bottom side at the top of fittings body (1) have mounting groove, O-ring (2) are equipped in mounting groove, and O-ring (2) one side contradicts connector
Body (1), opposite side contradict cylinder cap (15).
A kind of 7. double sealing structure hydraulic cylinder according to claim 6, which is characterized in that throttling valve core (3) Cheng Yuan
Column, throttling valve core (3) have locating slot close to one end of elastic construction (5), and one end of the elastic construction (5) is positioned at described
In locating slot.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721240124.2U CN207421016U (en) | 2017-09-26 | 2017-09-26 | A kind of double sealing structure hydraulic cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721240124.2U CN207421016U (en) | 2017-09-26 | 2017-09-26 | A kind of double sealing structure hydraulic cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207421016U true CN207421016U (en) | 2018-05-29 |
Family
ID=62313004
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721240124.2U Active CN207421016U (en) | 2017-09-26 | 2017-09-26 | A kind of double sealing structure hydraulic cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207421016U (en) |
-
2017
- 2017-09-26 CN CN201721240124.2U patent/CN207421016U/en active Active
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