CN206468815U - A kind of V-type polytetrafluoroethylcombination combination sealing ring - Google Patents

Abstract

The utility model discloses a kind of V-type polytetrafluoroethylcombination combination sealing ring, the combined seal ring includes pressure ring (1), support ring (3) and is arranged at sealing ring (2) between the two, wherein, the upper end of the pressure ring (1) and support ring (3) is contraction-like, area in sealing contact is reduced, the service life of sealing ring is extended；Section is offered in the support ring (3) in funnelform annular recess, enhance the stress reduction ability of support ring, simultaneously first step (334) and second step (335) are provided with the upper end of support ring (3), after sealing contact surface is worn, first step (334) and second step (335) continue to keep sealing property with needing sealed component contact.Combined seal ring structure novel described in the utility model, and use polytetrafluoroethylene (PTFE) to be prepared for raw material, while having good sealing property.

Description

A kind of V-type polytetrafluoroethylcombination combination sealing ring

Technical field

The utility model is related to sealing device, more particularly to sealing ring, and more particularly to a kind of V-type polytetrafluoroethylcombination combination is close Seal.

Background technology

At present, with sealing device sealed using sealing ring using more universal axle, it is mainly used in moving back and forth The sealing of ultrahigh-pressure hydraulic oil cylinder piston and piston rod, in order to further improve the sealing property of sealing device, it will usually use Combined seal ring, it is made up of pressure ring, sealing ring and support ring.

And similar combined seal ring has that stability is poor, the low defect of service life in the market.It is being used When, sealing ring is with needing the contact surface of sealed part (generally axle or set) larger, and the heat of generation is more, and heat is close It is difficult to shed in seal, causes sealing ring temperature distortion, service life reduction.

Utility model content

In order to overcome above mentioned problem, present inventor has performed studying with keen determination, each part of combined seal ring is changed Enter, reduce sealing ring with needing the contact area of sealed part, thus friction area is small, the heat produced in use It is few, so as to extend the life-span of sealing ring and ensure that its stable sealing, so as to complete the utility model.

Specifically, the purpose of this utility model is to provide following aspect：

(1) a kind of V-type polytetrafluoroethylcombination combination sealing ring, the combined seal ring includes pressure ring 1, support ring 3 and set Sealing ring 2 between the two is placed in, wherein, the pressure ring 1 is ring bodies of the section in class triangular structure 11, the class triangle Shape structure 11 includes top margin 113 and positioned at the lower end of top margin 113 and the first side 111 and second side of interconnection 112, wherein,

The first side 111 is that arc-shaped transition is connected with the second side 112；

The first side 111 is shunk in its upper end to the direction of second side 112, is formed first and is connected side 114, described First connection side 114 connection first side 111 and top margin 113；

The second side 112 is shunk in its upper end to the direction of first side 111, is formed second and is connected side 115, described Second connection side 115 connection second side 112 and top margin 113.

(2) combined seal ring according to above-mentioned (1), wherein,

The length of the first side 111 is equal to the length of the second side 112；And/or

Described first connects when 114 length is equal to the described second connection 115 length；And/or

The length ratio that the first side 111 is connected side 114 with described first is (4~5)： 1.

(3) combined seal ring according to above-mentioned (2), wherein,

Angle between the first side 111 and the second side 112 is 80~100 °；And/or

Angle between the connection of first side 111 and first side 114 is connected equal to the second side 112 with second Angle between side 115；And/or

Angle between the connection of first side 111 and first side 114 is 6~8 °.

(4) combined seal ring according to one of above-mentioned (1) to (3), wherein, the sealing ring 2 is the V-shaped knot in section The endless v cell body of structure 21, the V-structure 21 includes one 211, V-type outside 2 212, V-type inner edge 1 and V outside V-type Type inner edge 2 214, wherein, one 211 be that arc-shaped transition is connected with outside V-type 2 212 outside the V-type.

(5) combined seal ring according to above-mentioned (4), wherein,

One 211 shrink in its upper end to outside V-type 2 212 direction outside the V-type, form V-type connection side 1, The V-type connection side 1 connection V-type outside 1 and V-type inner edge 1；And/or

2 212 shrink in its upper end to outside V-type 1 direction outside the V-type, form V-type connection side 2 216, The V-type connection side 2 216 connection V-type outside 2 212 and V-type inner edge 2 214；And/or

The length ratio on the V-type connection side 1 and V-type outside 1 is (0.5~1.5)：4.

(6) combined seal ring according to above-mentioned (5), wherein, after the embedding sealing ring 2 of pressure ring 1,

2 212 paste with first side 111 and second side 112 respectively outside the V-type outside 1 and the V-type Close；And/or

V-type connection is 114 conllinear when one 215 are connected with described first；And/or

V-type connection is 115 conllinear when 2 216 are connected with described second.

(7) combined seal ring according to above-mentioned (5) or (6), wherein, the support ring 3 is ring bodies, in the branch The V-type groove body 31 V-shaped for the section that accommodates sealing ring 2 is offered on pushing out ring 3, is opened up in the lower section of V-type groove body 31 There is the groove body 32 of rectangular in cross-section, wherein, the lower end of the V-type groove body 31 is connected with the upper end of the groove body 32, shape It is in funnelform annular groove into section.

(8) combined seal ring according to above-mentioned (7), wherein,

The ratio between width and depth of the groove body 32 are (1.5~2)：(2.5~3)；And/or

The ratio between the width of the groove body 32 and the thickness of support ring 3 are (1.5~2)：(2.5~3).

(9) combined seal ring according to above-mentioned (8), wherein, the concave structure 33 in section of support ring 3 is described recessed Shape structure 33 includes concave side edges 1, spill base 333 and the concave side edges 2 332 being connected with each other successively, wherein, it is described Spill base 333 is that chamfering is connected with concave side edges 1, concave side edges 2 332.

(10) combined seal ring according to above-mentioned (8) or (9), wherein,

The concave side edges 1 are supported or opposed in its upper end from the direction protrusion of concave side edges 2 332, form first step 334；And/or

The concave side edges 2 332 are supported or opposed in its upper end from the direction protrusion of concave side edges 1, form second step 335。

Brief description of the drawings

Fig. 1 shows the structure of the V-type polytetrafluoroethylcombination combination sealing ring according to a kind of preferred embodiment of the utility model Schematic diagram；

Fig. 2 shows the longitdinal cross-section diagram of pressure ring；

Fig. 3 shows the longitdinal cross-section diagram of sealing ring；

Fig. 4 shows the longitdinal cross-section diagram of support ring；

Fig. 5 shows the amplifier section at a in Fig. 2；

Fig. 6 shows the amplifier section at b in Fig. 3；

Fig. 7 shows the amplifier section at c in Fig. 4.

Drawing reference numeral explanation：

1- pressure rings；

11- triangular structures；

111- first sides；

112- second sides；

113- top margins；

The connections of 114- first side；

The connections of 115- second side；

2- sealing rings；

21-V type structures；

One outside 211-V types；

Two outside 212-V types；

213-V types inner edge one；

214-V types inner edge two；

215-V types connect side one；

216-V types connect side two；

3- support rings；

31-V type groove bodies；

32- groove bodies；

33- concave structures；

331- concave side edges one；

332- concave side edges two；

333- spills base；

334- first steps；

335- second steps.

Embodiment

The utility model is further described below by drawings and examples.Illustrated by these, this practicality is new The characteristics of type and advantage will become more apparent from clearly.

Special word " exemplary " is meant " being used as example, embodiment or illustrative " herein.Here as " exemplary " Illustrated any embodiment should not necessarily be construed as preferred or advantageous over other embodiments.Although each of embodiment is shown in the drawings In terms of kind, but unless otherwise indicated, it is not necessary to accompanying drawing drawn to scale.

The utility model provides a kind of V-type polytetrafluoroethylcombination combination sealing ring, as shown in Fig. 1~4, the combination sealing Circle includes pressure ring 1, support ring 3 and is arranged at sealing ring 2 between the two, wherein, the pressure ring 1 is section in class triangle The ring bodies of structure 11, the sealing ring 2 is the endless v cell body of the V-shaped structure 21 in section, and the support ring 3 is ring bodies, The V-type groove 31 for accommodating sealing ring 2 is offered in the support ring 3.

Wherein, pressure ring 1 is embedded just below in the V-structure 21 of sealing ring 2, and the V-type that sealing ring 2 is embedded just below support ring 3 is recessed In groove 31, combined seal ring is constituted.Wherein, the effect of pressure ring is to transfer the pressure to sealing ring, makes V-type both sides and needs sealing Part fully contact, play sealing function, the effect of support ring is to alleviate pressure, strengthens the anti-extrusion energy of combined seal ring Power, and sealing function can be played with sealing ring simultaneously.

It is a kind of preferred embodiment according to the utility model, be provided between pressure ring 1 and support ring 3 1~10 it is close Seal ring.

In further preferred embodiment, 2~8 sealing rings are provided between pressure ring 1 and support ring 3.

In embodiment still more preferably, 3~5 sealing rings are provided between pressure ring 1 and support ring 3.

It is a kind of preferred embodiment according to the utility model, as shown in figure 5, it is in class triangle that the pressure ring 1, which is section, The ring bodies of structure 11, the class triangular structure 11 include top margin 113 and positioned at the lower end of top margin 113 and be connected with each other First side 111 and second side 112.

In further preferred embodiment, the first side 111 is arc-shaped transition with the second side 112 Connection.

Wherein, the convex structure is different from the right-angle structure of prior art, and when in use, convex structure is easier to Combination assembling.

In embodiment still more preferably, as shown in Figure 5：

The first side 111 is shunk in its upper end to the direction of second side 112, is formed first and is connected side 114, described First connection side 114 connection first side 111 and top margin 113；

The second side 112 is shunk in its upper end to the direction of first side 111, is formed second and is connected side 115, described Second connection side 115 connection second side 112 and top margin 113.

Wherein, as shown in figure 5, the top left and right sides of pressure ring is detained into kernel of section, after pressure ring embedding sealing ring, the Face of one connection where at the face where 114 and the second connection 115 is emerging in outside, in application with needing sealed part Contacted, this reduces contact area.

It is a kind of preferred embodiment according to the utility model, as shown in figure 5, the length of the first side 111 is equal to The length of the second side 112.

In further preferred embodiment, as shown in figure 5, the length on the first connection side 114 is equal to described the The length on two connection sides 115.

In embodiment still more preferably, the first side 111 is connected the length ratio on side 114 with described first For (4~5)：1, such as 4.5:1.

Wherein, the section of pressure ring is axially symmetric structure.

It is a kind of preferred embodiment according to the utility model, the first side 111 and the second side 112 it Between angle be 80~100 °, preferably 90 °.

In further preferred embodiment, the angle between the connection of first side 111 and first side 114 is equal to Angle between the connection of second side 112 and second side 115.

In embodiment still more preferably, the angle between the connection of first side 111 and first side 114 is 6~8 °, preferably 7 °.

Wherein, first side 111 shrinks 6~8 ° in its upper end to the direction of second side 112, and second side 112 is at it 6~8 ° are shunk to the direction of first side 111 in upper end.

It is a kind of preferred embodiment according to the utility model, as shown in fig. 6, the sealing ring 2 is the V-shaped structure in section 21 endless v cell body, the V-structure 21 includes one 211, V-type outside 2 212, V-type inner edge 1 and V-type outside V-type Inner edge 2 214.

Wherein, the V-type outside 1 and V-type outside 2 212 are located at the outside of V-structure 21, the V-type inner edge one 213 and V-type inner edge 2 214 be located at V-structure 21 inner side.

In further preferred embodiment, one 211 be that arc-shaped transition connects with outside V-type 2 212 outside the V-type Connect.

Wherein, the convex structure is different from the right-angle structure of prior art, and when in use, convex structure is easier to Combination assembling.

It is a kind of preferred embodiment according to the utility model, as shown in fig. 6, V types outside 1 is in its upper end 2 212 direction is shunk outside to V-type, V-type connection side 1 is formed, for connecting V-type outside 1 and V-type inner edge one 213。

In further preferred embodiment, 2 212 direction in its upper end to outside V-type 1 outside the V-type Shrink, V-type connection side 2 216 is formed, for connecting V-type outside 2 212 and V-type inner edge 2 214.

It is a kind of preferred embodiment according to the utility model, the V-type connection side 1 and outside the V-type one 211 length ratio is (0.5~1.5)：4, such as 1:4.

In further preferred embodiment, one 211 parallel to V types inner edge 1 outside the V-type.

In embodiment still more preferably, 2 212 parallel to V-type inner edge 2 214 outside the V-type.

It is a kind of preferred embodiment according to the utility model, after the embedding sealing ring 2 of pressure ring 1, one outside the V-type 211 and the V-type outside 2 212 fitted respectively with first side 111 and second side 112.

In further preferred embodiment, V-type connection is 114 conllinear when one 215 are connected with described first.

In embodiment still more preferably, V-type connection is 115 conllinear when 2 216 are connected with described second.

Wherein, after pressure ring embedding sealing ring, the first connection is where when the ring surface where 114 is connected with V-type 1 Ring surface it is coplanar, it is frictional contact surface, and the first connection is when 114 and V-type are connected one 215 to contract so that friction Contact area reduces, and the frictional heat of generation is reduced, and extends the service life of sealing ring.Side 2 216 and institute are connected for V types It is same to state the second connection side 115.

It is a kind of preferred embodiment according to the utility model, as shown in fig. 7, the support ring 3 is ring bodies, described The V-shaped V-type groove body 31 in section is offered in support ring 3, for accommodating sealing ring 2.

In further preferred embodiment, as shown in fig. 7, offering section in the lower section of V-type groove body 31 in square The groove body 32 of shape, the lower end of the V-type groove body 31 is connected with the upper end of the groove body 32, and Formation cross-section is in funnelform Annular groove.

Wherein, because the effect of support ring is to alleviate pressure, and groove body 32 increases support ring under the pressure of pressure ring Elasticity, improve its stress reduction ability because, if not opening up groove body 32, the elasticity of support ring (or stress reduction Ability) can only depend on support ring material elasticity, and groove body 32 enhances the stress reduction energy of support ring in structure Power.

It is a kind of preferred embodiment according to the utility model, the ratio between width of the groove body 32 and depth for (1.5~ 2)：(2.5~3), preferably 2:3.

In further preferred embodiment, the ratio between the width of the groove body 32 and the thickness of support ring 3 are (1.5 ~2)：(2.5~3), preferably 2:3.

Wherein, in support ring, groove body can not be too big, because too big meeting reduces the intensity of support ring, but too small, The elasticity of support ring can be reduced again.

It is a kind of preferred embodiment according to the utility model, as shown in fig. 7, the concave structure in the section of support ring 3 33, the concave structure 33 includes concave side edges 1, spill base 333 and the concave side edges 2 332 being connected with each other successively.

In further preferred embodiment, as shown in fig. 7, the spill base 333 and concave side edges 1, recessed Shape side 2 332 is chamfering connection.

Wherein, the chamfering is connected as 30~50 ° of chamfering connections, 45 ° of chamferings connection preferably as shown in Figure 7.

It is a kind of preferred embodiment according to the utility model, as shown in fig. 7, the concave side edges 1 are in its upper end To away from the direction of concave side edges 2 332 protrusion, first step 334 is formed.

In further preferred embodiment, as shown in fig. 7, the concave side edges 2 332 are supported or opposed from recessed in its upper end The direction protrusion of shape side 1, forms second step 335.

Wherein, support ring and sealing ring with need sealing surface that sealed part is contacted can with use time by Abrasion, still, in the utility model, pressure ring then is passed to sealing ring and support ring successively by the pressure of workpiece, due to recessed The presence of cell body, the V-type groove body of support ring is easy to magnify so that when the V-type connection of sealing ring is connected in one 215 and V-type 2 216, first step 334 and second step 335 with support ring continue to play sealing work respectively with needing sealed component contact With.

A kind of preferred embodiment according to the utility model, the combined seal ring uses polytetrafluoroethylene (PTFE) for raw material system .

The utility model have the advantage that including：

(1) contact area between combined seal ring described in the utility model and the sealed part of need is smaller, thus friction Area is small, and the heat produced during use is few, extends the service life of the combined seal ring；

(2) combined seal ring described in the utility model offers the groove body of rectangular in cross-section in support ring, improves The stress reduction ability of support ring；

(3) combined seal ring described in the utility model is provided with first step and second step in support ring, it is ensured that former After beginning sealing contact surface is worn, first step and second step play sealing function respectively with needing sealed component contact.

, it is necessary to explanation in description of the present utility model, the side of the instruction such as term " on ", " under ", " interior " and " outer " Position or position relationship be based on the plan positional relationship in the utility model accompanying drawing, be for only for ease of description the utility model and Simplify description, rather than indicate or imply that the device or element of meaning there must be specific orientation, with specific azimuth configuration And operation, therefore it is not intended that to limitation of the present utility model.Above in association with preferred embodiment to the utility model It is illustrated, but these embodiments are only exemplary, only play illustrative effect.On this basis, can be right The utility model carries out a variety of replacements and improvement, and these are each fallen within protection domain of the present utility model.

Claims (10)

1. a kind of V-type polytetrafluoroethylcombination combination sealing ring, the combined seal ring includes pressure ring (1), support ring (3) and set In sealing ring (2) between the two, it is characterised in that the pressure ring (1) is ring bodies of the section in class triangular structure (11), The class triangular structure (11) includes top margin (113) and positioned at top margin (113) lower end and the first side of interconnection (111) and second side (112), wherein,

The first side (111) is that arc-shaped transition is connected with the second side (112)；

The first side (111) is shunk in its upper end to the direction of second side (112), forms the first connection side (114), institute State the first connection side (114) connection first side (111) and top margin (113)；

The second side (112) is shunk in its upper end to the direction of first side (111), forms the second connection side (115), institute State the second connection side (115) connection second side (112) and top margin (113).

2. combined seal ring according to claim 1, it is characterised in that

The length of the first side (111) is equal to the length of the second side (112)；And/or

Described first connects the length of when the length of (114) is equal to the described second connection (115)；And/or

The length ratio that the first side (111) is connected side (114) with described first is (4~5)：1.

3. combined seal ring according to claim 2, it is characterised in that

Angle between the first side (111) and the second side (112) is 80~100 °；And/or

The angle that the first side (111) is connected with first between side (114) is equal to the second side (112) and connected with second Angle between edge fit (115)；And/or

The angle that the first side (111) is connected with first between side (114) is 6~8 °.

4. the combined seal ring according to one of claims 1 to 3, it is characterised in that the sealing ring (2) is that section is in V The endless v cell body of type structure (21), the V-structure (21) includes one (211) outside V-type, two (212), V-type outside V-type Inner edge one (213) and V-type inner edge two (214), wherein, one (211) and two (212) outside V-type are arc-shaped mistake outside the V-type Cross connection.

5. combined seal ring according to claim 4, it is characterised in that

One (211) are shunk in its upper end to the direction of two (212) outside V-type outside the V-type, form V-type connection side one (215), one (211) and V-type inner edge one (213) outside V-type connection side one (215) the connection V-type；And/or

Two (212) are shunk in its upper end to the direction of one (211) outside V-type outside the V-type, form V-type connection side two (216), two (212) and V-type inner edge two (214) outside V-type connection side two (216) the connection V-type；And/or

The length ratio of V-type connection side one (215) and one (211) outside the V-type is (0.5~1.5)：4.

6. combined seal ring according to claim 5, it is characterised in that after pressure ring (1) embedding sealing ring (2),

Outside the V-type one (211) and two (212) of V-type outside respectively with first side (111) and second side (112) Laminating；And/or

The V-type connection (114) when one (215) are connected with described first is conllinear；And/or

The V-type connection (115) when two (216) are connected with described second is conllinear.

7. the combined seal ring according to claim 5 or 6, it is characterised in that the support ring (3) is ring bodies, in institute State and the V-shaped V-type groove body (31) in the section for being used for accommodating sealing ring (2) is offered in support ring (3), in V-type groove body (31) groove body (32) of rectangular in cross-section is offered below, wherein, lower end and the groove of the V-type groove body (31) The upper end connection of body (32), Formation cross-section is in funnelform annular groove.

8. combined seal ring according to claim 7, it is characterised in that

The ratio between width and depth of the groove body (32) are (1.5~2)：(2.5~3)；And/or

The ratio between the width of the groove body (32) and the thickness of support ring (3) are (1.5~2)：(2.5~3).

9. combined seal ring according to claim 8, it is characterised in that the concave structure in section (33) of support ring (3), The concave structure (33) includes concave side edges one (331), spill base (333) and the concave side edges two being connected with each other successively (332), wherein, the spill base (333) is that chamfering is connected with concave side edges one (331), concave side edges two (332).

10. combined seal ring according to claim 9, it is characterised in that

The concave side edges one (331) are supported or opposed in its upper end from the direction protrusion of concave side edges two (332), form first step (334)；And/or

The concave side edges two (332) are supported or opposed in its upper end from the direction protrusion of concave side edges one (331), form second step (335)。