CN209638388U - A kind of piston in combination sealing element - Google Patents
A kind of piston in combination sealing element Download PDFInfo
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- CN209638388U CN209638388U CN201920229860.0U CN201920229860U CN209638388U CN 209638388 U CN209638388 U CN 209638388U CN 201920229860 U CN201920229860 U CN 201920229860U CN 209638388 U CN209638388 U CN 209638388U
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- piston
- elastomer
- sealing ring
- groove
- sealing element
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Abstract
The utility model relates to technical field of sealing technology, disclose a kind of piston in combination sealing element, including sealing ring and are attached at the elastomer of the sealing ring medial surface, the sealing ring and the elastomer are in a ring；The sealing ring has first end and second end, the first end offers first groove of the opening towards the second end, the second end is equipped with the first protrusion with first groove cooperation clamping, the second end offers second groove of the opening towards the first end, and the first end is equipped with the second protrusion with second groove cooperation clamping.The utility model has the following beneficial effects: setting opening form for sealing ring, and the double card fitting structure that groove is mutually clamped with protrusion is respectively set at the both ends of sealing ring, is easily installed piston in combination sealing element and guarantees leakproofness.
Description
Technical field
The utility model relates to technical field of sealing technology, more particularly to a kind of piston in combination sealing element.
Background technique
For piston in combination sealing element as the key components and parts inside hydraulic device, installation process has decided on whether can be sufficiently
Play the sealing performance of piston in combination sealing element.It is easily installed since there is elastomer elasticity can be strutted, and sealing ring is strong
Degree is more high-leveled and difficult to be strutted, and is easy to produce torsional deformation strutting, is caused piston in combination sealing element that cannot be fully sealed, to draw
The various failures of hydraulic device are played, therefore the installation of sealing ring is particularly significant；The mounting means of currently used sealing ring be by
Sealing ring, which is immersed in immersion 20min in 100 DEG C of oil liquid, makes sealing ring soften, and sealing ring is then packed into piston with tooling again
In card slot, but this mounting means is complicated for operation and inconvenient；
In addition, elastomer generally uses " O " type rubber or polyurethane, " O " type elastomer plays elastic compensating, improves sealing
Property effect；But " O " type elastomer is easy overturning under high pressure, high-frequency vibration working condition, makes the reliable of piston in combination sealing element
Property reduce；
Furthermore the plastics of common polytetrafluoroethylene (PTFE) material can play reduction frictional resistance as sealing ring at present, improve
Wearability extends the effect of the service life of piston in combination sealing element；But such as in spies such as rough surface, high pressure, high-frequency vibrations
Very using under working condition, the sealing ring of polytetrafluoroethylene (PTFE) material is since surface hardness is low, scratch-resistant, mechanical strength be not high
Disadvantage easily causes piston in combination seal durability short, generates leakage soon, and seal under high pressures ring is easy to squeeze out,
High-intensitive and hardness retaining ring need to be increased, increase the complexity of sealing system in this way.
Utility model content
The purpose of the utility model is to overcome the deficiencies in the prior art, provide a kind of piston in combination sealing element, can make piston
Combination seal is easily installed and can guarantee leakproofness.
To achieve the goals above, the utility model provides a kind of piston in combination sealing element comprising sealing ring and is sticked
In the elastomer of the sealing ring medial surface, the sealing ring and the elastomer are in a ring；
The sealing ring has first end and second end, and the first end offers opening towards the first of the second end
Groove, the second end are equipped with the first protrusion with first groove cooperation clamping, and the second end offers opening court
To the second groove of the first end, the first end is equipped with the second protrusion with second groove cooperation clamping.
Preferably, first groove through the first end lateral surface, second groove through
The lateral surface of the second end.
Preferably, first groove is through the lower end surface of the first end, second groove through
The upper surface of the second end.
Preferably, the medial surface of first protrusion offers first step, and the end face of the first step is supported
It is connected to the side of the first end corresponding thereto；The medial surface of second protrusion offers second step, and described second
The end face of step is connected to the side of the second end corresponding thereto.
Preferably, first groove and second groove are arranged in a staggered manner along the vertical direction.
Preferably, when observing along the axial section of the elastomer, the medial surface of the elastomer is in straight
Line, the lateral surface of the elastomer are in convex arc line.
Preferably, when observing along the axial section of the elastomer, the both ends of the surface of the elastomer are in
Straight line.
Preferably, along the axial cross-section observation of the elastomer, the elastomer is integrally in " D " type.
Preferably, the sealing ring is the sealing ring of polyether-ether-ketone material.
Preferably, the elastomer is the elastomer of nitrile rubber material.
Compared with prior art, the utility model has the beneficial effects that:
Piston in combination sealing element provided by the utility model includes sealing ring and the elastomer in sealing ring, sealing ring
It is set as opening form, the double card fitting structure that protrusion is mutually mutually clamped with groove is respectively set by the both ends of sealing ring, can make
Piston in combination sealing element is easily installed and can guarantee leakproofness；
Further, it is the shape that inside is linear, outside is in convex arc line by the way that the axial cross section of elastomer is arranged, makes to live
Plug combination seal is not easy to overturn, and improves the stability of piston in combination sealing element；
Further, using the sealing ring of polyether-ether-ketone material, piston in combination sealing element hardness height, scratch-resistant, machine can be made
Tool intensity is high, it is extrudability good to resist, to improve the reliability of piston in combination sealing element.
Detailed description of the invention
Fig. 1 is the schematic diagram of a kind of piston in combination sealing element in actual use in the present embodiment；
Fig. 2 is a kind of structure chart of sealing ring in the utility model embodiment；
A kind of axial, cross-sectional view of piston in combination sealing element in the utility model embodiment in Fig. 3；
In figure, 1, sealing ring；11, first end；111, the first groove；112, the second protrusion；113, second step；12,
Two ends；121, the first protrusion；122, the second groove；123, first step；2, elastomer；3, card slot；4, piston cylinder；5, piston.
Specific embodiment
With reference to the accompanying drawings and examples, specific embodiment of the present utility model is described in further detail.Below
Embodiment is not intended to limit the scope of the present invention for illustrating the utility model.
In the description of the present invention, it should be understood that term " on ", "lower", "left", "right", "top", "bottom" etc.
The orientation or positional relationship of instruction is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of description the utility model
It is described with simplifying, rather than the device or element of indication or suggestion meaning must have a particular orientation, with specific orientation structure
It makes and operates, therefore should not be understood as limiting the present invention.It should be understood that using term in the utility model
" first ", " second " etc. describe various information, but these information should not necessarily be limited by these terms, these terms are only used to will be same
The information of type is distinguished from each other out.For example, " first " information can also be claimed in the case where not departing from the scope of the utility model
Similar for " second " information, " second " information can also be referred to as " first " information.
As shown in Figure 1-Figure 3, the utility model provides a kind of piston in combination sealing element, including sealing ring 1 and is attached at institute
The elastomer 2 of 1 medial surface of sealing ring is stated, the sealing ring 1 and elastic 2 body are in a ring；
The sealing ring 1 has first end 11 and second end 12, and the first end 11 offers opening towards described second
First groove 111 at end 12, the second end 12 are equipped with the first protrusion 121 with first groove 111 cooperation clamping, institute
It states second end 12 and offers second groove 122 of the opening towards the first end 11, the first end 11 is equipped with and described the
Second protrusion 112 of two grooves 122 cooperation clamping.
Specifically, as follows in the installation process of piston in combination sealing element: elastomer 2 is socketed on to the card slot 3 of piston 5 first
On；Then the access section of sealing ring 1 is opened to adjust the circumferential size of sealing ring 1, is socketed on elastomer 2 convenient for sealing ring 1
Outside；Sealing ring 2 is finally closed to the diameter of piston cylinder 4, will be cased with combination seal piston 5 be packed into piston cylinder 4 in
Complete installation；In piston in combination sealing element use process, the elastomer 2 plays the role of elastic compensating, and the sealing ring 1 can be with
Reduction frictional resistance is played, wearability is improved, extends the effect of the service life of combination seal.
Preferably, through the lateral surface of the first end 11, second groove 122 runs through first groove 111
In the lateral surface of the second end 12, which, just can be convex by first by being staggered the both ends of sealing ring 1 along inward-outward direction
121 are stuck in the first groove 111, and the second protrusion 112 is directed at the second groove 122, more conducively install.
Preferably, in the present embodiment, first groove 111 is through the lower end surface of the first end 11, and described second
Groove 122 is through the upper surface of the second end 12, just can be by first by the both ends for the sealing ring 1 that is staggered along the vertical direction
Protrusion 121 is aligned with the first groove 111, the second protrusion 112 with the second groove 122, to complete to be clamped.
Preferably, the medial surface of first protrusion 121 offers first step 123, the end face of the first step 123
It is connected to the side of the first end 11 corresponding thereto；The medial surface of second protrusion 112 offers second step
113, the end face of the second step 113 is connected to the side of the second end 12 corresponding thereto, which can be effective
Improve the sealing ring 1 along the circumferential direction on leakproofness.
Preferably, in order to further increase the sealing ring 1 in axial direction on leakproofness, first groove 111
It is arranged in a staggered manner along the vertical direction with second groove 122.
Preferably, when observing along the axial section of the elastomer 2, the medial surface of the elastomer 2 is linear, institute
The lateral surface of elastomer 2 is stated in convex arc line；With " O " type elastomer phase ratio, elastic 2 body has under high pressure, high-frequency vibration
It is not easy to overturn, the higher feature of stability.
Specifically, as shown in Figure 1, when being observed along the axial section of the elastomer 2, the both ends of the elastomer 2
Face is linear.
Specifically, along the axial cross-section observation of the elastomer 2, the elastomer 2 it is whole in " D " type (in attached drawing not
Such embodiment is shown).
Preferably, the sealing ring 1 is the sealing ring of polyether-ether-ketone material, and polyether-ether-ketone has such as wearability, chemically-resistant
The performances such as corrosivity, self-lubrication, preferable intensity and toughness, stability, can be as the sealing of reciprocating hydraulic piston seal
Material.
Specifically, the material of the sealing ring 1 in the present embodiment is modified polyether-ether-ketone, piston group in the present embodiment
In the manufacturing process for closing sealing element, polyether-ether-ketone uses diameter for 15-75 microns of fine powder, first by polyether-ether-ketone powder,
Extruding pelletization after wear resistant filler, solid lubricant mixed at high speed, molding or injection molding are blank materials in the tube, then use lathe process
At semi-finished product, last Milling Machining is at sealing ring 1 as shown in Figure 2.The sealing ring 1 has low-friction coefficient, high-wearing feature, height
The performances such as intensity, self-lubricating, can be effectively reduced the resistance of piston in combination sealing element, increase scratch resistance and resist it is extrudability, from
And improve the reliability of piston in combination sealing element.
Specifically, wear resistant filler includes any one of carbon black, carbon fiber, mineral fibres, wollastonite or their group
It closes.
Specifically, solid lubricant includes any one of graphite, molybdenum disulfide, polytetrafluoroethylene (PTFE) or their group
It closes.
Specifically, the elastomer 2 is the elastomer of nitrile rubber material, and the elastomer 2 can play elastic compensating,
Improve leakproofness effect.
Preferably, the material of the elastomer 2 use Shore A hardness for 70-75, compression set no more than 30%,
Elongation at break is not less than 100% oil-resistant acrylonitrile-butadirubber rubber, and the elastomer 2 has oil resistant, low compression set, high rebound
The characteristics of property.
Specifically, the piston in combination sealing element is not higher than suitable for rough surface, unbalance loading, big fit clearance, pressure
The reciprocating-piston of 50MPa, speed no more than 1.5m/s, temperature not higher than 110 DEG C not less than -35 DEG C seals occasion.
The performance comparison of the sealing ring of the sealing ring and the prior art one and the prior art two of 1 the present embodiment of table
Table 1 is the performance comparison of the sealing ring 1 of the present embodiment and the sealing ring of the prior art one and the prior art two, existing
Elastomer in technology one and the prior art two uses structure and material identical with the elastomer 2 in the present embodiment.Existing
In the piston in combination sealing element manufacturing process of technology one, first by polyether-ether-ketone powder extruding pelletization, molding or injection molding are
Blank tubing, then with lathe process at semi-finished product, last Milling Machining is at the sealing ring in the prior art one.In the prior art two
Piston in combination sealing element manufacturing process in, first by mixed at high speed such as polytetrafluorethylepowder powder, wear resistant filler, solid lubricants
Afterwards, cold-rolled sintered at blank materials in the tube, then with lathe process at the sealing ring of the prior art two.
As shown in Table 1, the sealing ring 1 of the present embodiment is compared with the performance of the sealing ring of the prior art one, the present embodiment
1 coefficient of friction of sealing ring is lower, abrasion loss is lower, hardness is higher, tensile strength is larger, elongation at break is lower, line expansion system
Number it is smaller, thus make the smaller frictional resistance of piston in combination sealing element, scratch-resistant, hardness are higher, resist it is extrudability preferably, reliability
It is higher.
As shown in Table 1, the sealing ring 1 of the present embodiment is compared with the performance of the sealing ring of the prior art two, although this implementation
The coefficient of friction of the sealing ring 1 of example is not so good as the prior art two, but the abrasion loss of the sealing ring 1 of the present embodiment, elongation at break
And linear expansion coefficient will be significantly larger than the prior art two well below the prior art two, hardness and tensile strength, this keeps this practical
Novel piston in combination sealing element has that scratch-resistant, hardness are high, it is extrudability good and other effects to resist compared with the prior art two.
To sum up, the sealing ring 1 of piston in combination sealing element provided by the utility model is set as opening form, passes through sealing ring
The double card fitting structure that protrusion is mutually clamped with groove is respectively set in 1 both ends, and piston in combination sealing element can be made to be easily installed and energy
Guarantee leakproofness；
Further, it is the shape that inside is linear, outside is in convex arc line by the way that the axial cross section of elastomer 2 is arranged, makes
Piston in combination sealing element is not easy to overturn, and improves the stability of piston in combination sealing element；
Further, using the sealing ring 2 of polyether-ether-ketone material, piston in combination sealing element hardness height, scratch-resistant, machine can be made
Tool intensity is high, it is extrudability good to resist, to improve the reliability of piston in combination sealing element.
The above is only the preferred embodiment of the utility model, it is noted that for the common skill of the art
For art personnel, without deviating from the technical principle of the utility model, several improvement and replacement can also be made, these change
It also should be regarded as the protection scope of the utility model into replacement.
Claims (10)
1. a kind of piston in combination sealing element, which is characterized in that including sealing ring and be attached at the elasticity of the sealing ring medial surface
Body, the sealing ring and the elastomer are in a ring；
The sealing ring has first end and second end, and the first end offers opening towards the first recessed of the second end
Slot, the second end are equipped with the first protrusion with first groove cooperation clamping, and the second end offers opening direction
Second groove of the first end, the first end are equipped with the second protrusion with second groove cooperation clamping.
2. piston in combination sealing element as described in claim 1, which is characterized in that first groove is through the first end
Lateral surface, lateral surface of second groove through the second end.
3. piston in combination sealing element as described in claim 1, which is characterized in that first groove is through the first end
Lower end surface, second groove is through the upper surface of the second end.
4. piston in combination sealing element as described in claim 1, which is characterized in that the medial surface of first protrusion offers
One step, the end face of the first step are connected to the side of the first end corresponding thereto；Second protrusion it is interior
Side offers second step, and the end face of the second step is connected to the side of the second end corresponding thereto.
5. piston in combination sealing element as described in claim 1, which is characterized in that first groove and second groove edge
Up and down direction is arranged in a staggered manner.
6. piston in combination sealing element as described in claim 1, which is characterized in that seen along the axial section of the elastomer
When examining, the medial surface of the elastomer is linear, and the lateral surface of the elastomer is in convex arc line.
7. piston in combination sealing element as claimed in claim 6, which is characterized in that seen along the axial section of the elastomer
When examining, the both ends of the surface of the elastomer are linear.
8. piston in combination sealing element as described in claim 1, which is characterized in that see in the axial section along the elastomer
It examines, the elastomer is integrally in " D " type.
9. such as the described in any item piston in combination sealing elements of claim 1-8, which is characterized in that the sealing ring is polyether-ether-ketone
The sealing ring of material.
10. such as the described in any item piston in combination sealing elements of claim 1-8, which is characterized in that the elastomer is butyronitrile rubber
The elastomer of glue material matter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920229860.0U CN209638388U (en) | 2019-02-21 | 2019-02-21 | A kind of piston in combination sealing element |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920229860.0U CN209638388U (en) | 2019-02-21 | 2019-02-21 | A kind of piston in combination sealing element |
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| CN209638388U true CN209638388U (en) | 2019-11-15 |
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| CN201920229860.0U Active CN209638388U (en) | 2019-02-21 | 2019-02-21 | A kind of piston in combination sealing element |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111734825A (en) * | 2020-05-20 | 2020-10-02 | 上海巨乾工贸有限公司 | Constant pressure impels extrusion sealing ring |
| CN114192751A (en) * | 2020-09-18 | 2022-03-18 | 丰田自动车株式会社 | Plunger head and sliding method |
-
2019
- 2019-02-21 CN CN201920229860.0U patent/CN209638388U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111734825A (en) * | 2020-05-20 | 2020-10-02 | 上海巨乾工贸有限公司 | Constant pressure impels extrusion sealing ring |
| CN114192751A (en) * | 2020-09-18 | 2022-03-18 | 丰田自动车株式会社 | Plunger head and sliding method |
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