CN207906196U - A kind of cylinder piston rod V group sealing structure units - Google Patents
A kind of cylinder piston rod V group sealing structure units Download PDFInfo
- Publication number
- CN207906196U CN207906196U CN201820271627.4U CN201820271627U CN207906196U CN 207906196 U CN207906196 U CN 207906196U CN 201820271627 U CN201820271627 U CN 201820271627U CN 207906196 U CN207906196 U CN 207906196U
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- piston rod
- rear end
- end cap
- gland
- copper sheathing
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Abstract
The utility model is related to a kind of cylinder piston rod V group sealing structure units, support copper sheathing, V groups sealing ring and locating part are sequentially installed in the circumferential weld between rear end cap and piston rod, last gland, which is inserted into circumferential weld, fastens locating part；The shape that traditional support copper sheathing is changed in the utility model goes to V groups sealing ring in the endoporus of rear end cap from the endoporus of support copper sheathing, even if there is damage inside support copper sheathing, V groups sealing ring blocks the channel of oil leak from end；The group sealing ring one end V is contacted with support copper sheathing, and the other end is set to finite place piece, is limited to V group sealing elements, and preventing piston rod, V groups sealing ring is squeezed out from gap in the process of moving；Gland is transferred in locating part V group sealing ring limit functions, the distance between gland and piston rod increase, and reduce the possibility pulled to piston rod surface.
Description
【Technical field】
The utility model is related to mud bubble hydraulic cylinder field, specially a kind of cylinder piston rod V group sealing structure units.
【Background technology】
The sealing of hydraulic cylinder rod chamber end include at end cap the dynamic sealing at static seal and piston rod, dynamic sealing it is main
Using V group sealing structure forms, major function has：(1) play the role of supporting sealing bar in piston rod moving process, prevent
Only piston rod and piston are not parallel during the motion；(2) piston rod surface is sealed in piston rod moving process, is prevented
Only hydraulic oil oil leak from piston rod causes rod chamber pressure release, therefore the dynamic sealing at piston rod plays the service life of oil cylinder and closes
Keyness acts on.
Now common dynamic sealing V group sealing devices are monoblock type copper sheathing V group sealing devices, schematic device such as Fig. 1 institutes
Show：O-ring seals static seal is used between cylinder tube and rear end cap, it is quiet close by O-ring seals between rear end cap and support copper sheathing
Envelope supports and passes through V group sealing ring dynamic sealings between copper sheathing and piston rod；The monoblock type copper sheathing V group sealing devices have following two
A defect：(1) since support copper sheathing is casting, if copper sheathing because casting itself is defective, can not pressure-bearing, leakage point is possible to keep away
O-ring seals and V groups sealing ring are opened directly from the oil leak outward of copper sheathing ontology, lead to seal failure, cylinder rod chamber pressure release；(2)
In the V group sealing devices, the gap of gland and piston rod is too small, is susceptible to gland and pulls piston rod, it is close that piston rod damages V groups
Sealing makes V group seal fails, pulled from piston rod from oil leak；The gap of gland and piston rod is excessive, in rod chamber boosting
V groups sealing ring can be caused to be squeezed out from the gap of gland and piston rod in the process, to make V group sealing rings damage, sealing is caused to be lost
Effect, oil cylinder oil leak.
【Utility model content】
The shortcomings that the purpose of the utility model is to overcome the above-mentioned prior arts provides a kind of cylinder piston rod V groups sealing
Structure.The utility model improves sealing structure, changes the shape of support copper sheathing, make V groups sealing ring from sealing support copper sheathing and
Gap between piston rod is changed to the gap between sealing rear end cap and piston rod；It is increased on rear end cap ontology simultaneously
Support, sealing device, make oil cylinder have two layers of seal protection measure.
To achieve the above objectives, the utility model is achieved by the following technical programs.
A kind of cylinder piston rod V group sealing structure units, including rear end cap and the piston rod in rear end cap endoporus；
Support copper sheathing, V groups sealing ring, locating part and for compressing locating part are sequentially installed in circumferential weld between rear end cap and piston rod
Gland.
Gland is provided with support seal assembly in the medial surface close to piston rod, and gland is set in the lateral surface close to rear end cap
It is equipped with sealing element；Gland is further opened with the correspondence of several installation support seal assemblies and sealing element on medial surface and lateral surface
Groove.
Support seal assembly includes two support guide bands and the band that is arranged among two support guide bands.
Seal assembly is supported to select Glais ring combination；Sealing element selects O-ring seals.
Locating part selects copper sheathing.
Rear end cap is mounted in the endoporus of cylinder tube, and O-ring seals are provided between rear end cap and cylinder tube.
Gland is equipped with dustband in edge of its medial surface far from locating part.
Support the female coaxial of the endoporus and rear end cap of copper sheathing.
Compared with prior art, the utility model has following advantageous effect.
The utility model is related to a kind of cylinder piston rod V group sealing structure units, the ring between rear end cap and piston rod
Support copper sheathing, V groups sealing ring and locating part are sequentially installed in seam, last gland, which is inserted into circumferential weld, fastens locating part；This
Utility model changes the shape of traditional support copper sheathing, and V groups sealing ring is gone to from the endoporus of support copper sheathing in rear end cap
Kong Zhong, even if there is damage inside support copper sheathing, V groups sealing ring blocks the channel of oil leak from end；The group sealing ring one end V and support
Copper sheathing contacts, and the other end sets to finite place piece, limited to V group sealing elements, and preventing piston rod, V groups are close in the process of moving
Seal is squeezed out from gap；Gland is transferred in locating part V group sealing ring limit functions, between gland and piston rod away from
From increase, reduce the possibility pulled to piston rod surface.
Further, gland is being provided with support seal assembly on the inside of piston rod, close to the outside of rear end cap
It is provided with sealing element, sealing device is arranged in its both sides in gland, if the failure of V group sealing rings, gland can be with to the sealing structure
Secondary seal is carried out, prevents fluid from leaking.
Further, the support seal assembly on gland includes the sealing among support guide band and two support guide bands
Band, support guide band play a supportive role, and prevent gland and plunger rod contacts, pull piston rod；Band seals, and prevents
Grease leaks out.
Further, the support seal assembly of the utility model gland medial surface selects Glais ring component, and Glais ring is double
Piston seal is acted on, frictional force is low, high pressure resistant and sealing；The lateral surface of gland is static seal, selects common O-ring seals,
It is at low cost, liquid leakage can be effectively prevented in a static condition.
Further, locating part selects copper sheathing, and copper sheathing is wear-resisting and hardness is less than piston rod, will not be pulled with plunger rod contacts
Piston rod, and can play the role of limiting V group sealing rings.
Further, it is provided with static seal O-ring seals between rear end cap and cylinder tube, further prevents oozing for liquid
Leakage.
Further, gland is equipped with dustband in the edge of its medial surface, prevents external dust from falling to hydraulic cylinder
Inside influences lubricant effect.
Further, the endoporus of copper sheathing and the female coaxial of rear end cap are supported, during ensureing that piston rod moves axially,
Support the stationarity of copper sheathing support piston rod.
【Description of the drawings】
Fig. 1 is traditional monoblock type copper sheathing V group sealing devices；
Fig. 2 is the utility model V group sealing structure unit schematic diagrames；
Wherein：1- piston rods；2- cylinder tubes；3- rear end caps；4- supports copper sheathing；5- locating parts；6- glands；7-O shapes are close
Seal；8-V group sealing rings；9- dustbands；10- supports seal assembly；11- sealing elements.
【Specific implementation mode】
The utility model is related to a kind of cylinder piston rod V group sealing structure units, including cylinder tube 2, rear end cap 3 and work
Stopper rod 1；Piston rod 1 is mounted in the endoporus of rear end cap 3, and rear end cap 3 is mounted in the endoporus of cylinder tube 2；2 He of cylinder tube
By 7 static seal of O-ring seals between rear end cap 3, set gradually from left to right in the gap between rear end cap 3 and piston rod 1
Have and supports copper sheathing 4, V groups sealing ring 8, locating part 5 and gland 6,5 preferred copper sheathing of locating part in the utility model；Gland 6 is close
Support seal assembly 10, the preferred Glais ring combination of the utility model are provided on the side of piston rod 1；Gland 6 is close to rear end
Sealing element 11, the preferred O-ring seals of the utility model are provided on the side of lid 3；Peace is offered including gland 6, on lateral surface
The groove of dress support seal assembly 10 and sealing element 11；Gland 6 is equipped with dustband 9 in the edge of its medial surface.
Installation process
(1) O-ring seals 7 are mounted in the groove of rear end cap 3, rear end cap 3 is mounted on from the right side of cylinder tube 2
In cylinder tube 2, and it is bolted；
(2) it will support 4 hot charging of copper sheathing in the endoporus of rear end cap 3, support copper sheathing 4 and rear end cap 3 made to be interference fitted；System
The endoporus of one process support copper sheathing 4 and rear end cap 3, it is ensured that the concentricity of exit orifice in rear end cap 3 also preferably ensures copper sheathing branch
Support the stationarity of piston rod 1；
(3) piston rod 1 is fitted into from the left side of cylinder tube 2 in rear end cap 3 and support copper sheathing 4, piston rod 1 can be in oil cylinder
Axial movement in cylinder barrel 2；
(4) V groups sealing ring 8 is packed into rear end cap 3 in the annular groove of piston rod 1, is reloaded into locating part 5；
(5) support seal assembly 10 is mounted on gland 6 in the groove of 1 medial surface of piston rod, sealing element 11 is installed
In gland 6 in the groove of 3 lateral surface of rear end cap；
(6) gland 6 for installing sealing element is packed into the annular groove of piston rod 1 and rear end cap 3, and compresses locating part 5；
(7) it is packed into dustband 9 at the right end of gland 6, gland 6 and the gap of piston rod 1.
Sealing principle
When hydraulic cylinder works, cylinder tube 2, rear end cap 3, support copper sheathing 4, locating part 5 and gland 6 are fixed not
Dynamic, piston rod 1 axially moves along cylinder tube 2, and piston rod 1 can be with support copper sheathing 4, the V groups sealing ring 8 in rear end cap 3
Sliding friction is generated with gland 6, the hydraulic oil in motion process cylinder tube 2 does not leak outside along piston rod 1, then requires V groups
Sealing ring 8 is not damaged, and 1 outer surface of piston rod is not pulled, and otherwise easily leads to V group seal failures, oil cylinder oil leak.
As shown in Figure 1, the monoblock type copper sheathing V group sealing devices of the prior art, rear end cap and support copper sheathing static seal, V groups
Sealing ring is packed into support copper sleeve inner hole, between support copper sheathing and piston rod, is split when support copper sheathing itself has caused by casting
When line or other defects, lubricating oil possibly through flowed directly into inside copper sheathing to rear end cap with support copper sheathing gap in (such as
Arrow is directed toward in Fig. 1), cross V groups sealing ring and O-ring seals；In addition, because gland is metal material, hardness is higher, works as gland
When closer with plunger rod contacts, gland is possible to pull piston rod；Gland and piston rod gap are excessive, in piston rod moving process
In, V group sealing rings are possible to squeeze out from the gap of support copper sheathing and piston rod.
As shown in Fig. 2, the V group sealing structures of the utility model, it is hot charging that support copper sheathing 4, which is packed into rear end cap 3, makes support copper
Set 4 is interference fitted with rear end cap 3, is then punched to support copper sheathing 4 and rear end cap 3, it is ensured that copper sheathing 4 and 3 coaxial line of rear end cap；
After piston rod 1 is enclosed in the endoporus of rear end cap 3 and support copper sheathing 4, V groups sealing ring 8 is directly installed in the endoporus of rear end cap 3, i.e.,
Just support copper sheathing 4 itself is problematic is possible to generate oil leakage phenomenon, and V groups sealing ring 8 can be carried out directly from the end of support copper sheathing 4
Sealing；It after V groups sealing ring 8 is enclosed in the endoporus of rear end cap 3, is limited by locating part 5, locating part 5 and piston rod 1
Gap is smaller, avoids piston rod 1 from during the motion squeezing out V groups sealing ring 8 from gap and damages, causes seal failure,
5 preferred copper sheathing of locating part in the utility model (because copper sheathing is wear-resisting and opposing pistons bar 1 the material is soft, moved in piston rod 1
During, piston rod will not be pulled)；It is contacted with V groups sealing ring 8 since gland 6 is not direct, therefore its endoporus and piston rod 1
Gap can be bigger than normal, and to avoid piston rod 1 is pulled, damage V groups sealing ring 8 causes draining；Also increase between gland 6 and piston rod 1
Supporting sealing member 10 is added, the front and back combination sealing is support guide band, and centre is sealing element, which suitably increases rear end
Gap between lid 3 and piston rod 1 can preferably prevent pulling between gland 6 and piston rod 1, and have support and sealing
Effect；Sealing element 11 is additionally provided between gland 6 and rear end cap 3, gland 6 is respectively provided with sealing in internal and external walls, ensures in V groups
In the case that sealing ring 8 fails, oil cylinder will not oil leak, play secondary seal effect, supporting sealing member 10 in the utility model
It is preferred that Glais ring；Rear end cap 3 is also filled with dustband 9 in the edge of its medial surface, prevents dust from falling into piston rod 1 and rear end
In circumferential weld between lid 3, lubricant effect is influenced.
In conclusion there are two the stages of sealing for the utility model：
(1) piston rod 1 is in moving process, if support copper sheathing 4 is because itself there is crackle to cause grease inside support copper sheathing 4
Exudation, the V groups sealing ring 8 mounted on 4 one end of support copper sheathing can prevent fluid from continuing to leak outside；
(2) when V groups sealing ring 8 fails, the sealing support component 10 and sealing element 11 of gland 6 hinder the access of grease
It is disconnected, prevent fluid from leaking outside.
The utility model not only has double-layer seal to fluid, and the gap between gland 6 and piston rod 1 also can suitably increase,
Reduce gland 6 and pull the possibility of piston rod 1, and then reduce 8 impaired possibility of V groups sealing ring, extends the sealing of V groups
The service life of circle 8.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Within the spirit and principle of utility model, any modification, equivalent replacement, improvement and so on should be included in the utility model
Protection domain within.
Claims (8)
1. a kind of cylinder piston rod V group sealing structure units, which is characterized in that including rear end cap (3) and be mounted on rear end cap (3)
Piston rod (1) in endoporus；It is close that support copper sheathing (4), V groups are sequentially installed in circumferential weld between rear end cap (3) and piston rod (1)
Seal (8), locating part (5) and the gland (6) for compressing locating part (5).
2. a kind of cylinder piston rod V group sealing structure units according to claim 1, which is characterized in that gland (6) by
The medial surface of nearly piston rod (1) is provided with support seal assembly (10), and gland (6) is arranged in the lateral surface close to rear end cap (3)
There is sealing element (11)；Gland (6) is further opened with several installation support seal assemblies (10) and close on medial surface and lateral surface
The respective grooves of sealing (11).
3. a kind of cylinder piston rod V group sealing structure units according to claim 2, which is characterized in that support sealing group
Part (10) includes two support guide bands and the band that is arranged among two support guide bands.
4. a kind of cylinder piston rod V group sealing structure units according to claim 2 or 3, which is characterized in that support sealing
Component (10) selects Glais ring combination；Sealing element (11) selects O-ring seals.
5. a kind of cylinder piston rod V group sealing structure units according to claim 1, which is characterized in that locating part (5) selects
Use copper sheathing.
6. a kind of cylinder piston rod V group sealing structure units according to claim 1, which is characterized in that rear end cap (3) is pacified
In the endoporus of cylinder tube (2), O-ring seals (7) are provided between rear end cap (3) and cylinder tube (2).
7. a kind of cylinder piston rod V group sealing structure units according to claim 1, which is characterized in that gland (6) is at it
Edge of the medial surface far from locating part (5) is equipped with dustband (9).
8. a kind of cylinder piston rod V group sealing structure units according to claims 1 or 2 or 3 or 5 or 6 or 7, feature
It is, the female coaxial of the endoporus and rear end cap (3) of support copper sheathing (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820271627.4U CN207906196U (en) | 2018-02-26 | 2018-02-26 | A kind of cylinder piston rod V group sealing structure units |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820271627.4U CN207906196U (en) | 2018-02-26 | 2018-02-26 | A kind of cylinder piston rod V group sealing structure units |
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| Publication Number | Publication Date |
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| CN207906196U true CN207906196U (en) | 2018-09-25 |
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| CN201820271627.4U Active CN207906196U (en) | 2018-02-26 | 2018-02-26 | A kind of cylinder piston rod V group sealing structure units |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108286541A (en) * | 2018-02-26 | 2018-07-17 | 中钢集团西安重机有限公司 | A kind of cylinder piston rod V groups sealing structure unit and its installation method |
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2018
- 2018-02-26 CN CN201820271627.4U patent/CN207906196U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108286541A (en) * | 2018-02-26 | 2018-07-17 | 中钢集团西安重机有限公司 | A kind of cylinder piston rod V groups sealing structure unit and its installation method |
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