CN209688083U - Ultrahigh pressure cylinder seal assembly - Google Patents

Abstract

The utility model relates to the technical fields of sealing element, disclose a kind of ultrahigh pressure cylinder seal assembly, its key points of the technical solution are that including support ring, cloth oil ring and sealing ring, the outer ring side of support ring is arranged in the cloth oil ring, the sealing ring is coated on the outer surface of cloth oil ring, the two sides of the support ring is respectively equipped with graphite bottom, and the graphite bottom is equipped with bearing ring, and the bearing ring is higher than sealing ring.In the utility model, support ring can be pressed between inner wall of cylinder and piston by the setting of bearing ring and graphite bottom, reached between inner wall of cylinder and piston with this, and the effect for compressing support ring is stablized.

Description

Ultrahigh pressure cylinder seal assembly

Technical field

The utility model relates to the technical field of sealing element, in particular to a kind of ultrahigh pressure cylinder seal assembly.

Background technique

Superhigh Pressure Hydraulic System is in field of industrial production important role.Superhigh Pressure Hydraulic System, since oil pressure is very high, Compared to general hydraulic system, oil cylinder executing agency is easier to leak, and influences the performance of oil cylinder.Therefore for superelevation hydraulic fluid How pressure system guarantees that oil cylinder executing agency does not leak, and is the major issue that oil cylinder designer must be taken into consideration.Especially The internal leakage of oil cylinder will guarantee oil cylinder starting pressure when designing the sealing structure between super high pressure oil the cylinder piston and cylinder barrel It is no more than requirements of the national standard with internal leakage, guarantees the service life of cylinder seal again, and is reduced as far as possible because sealing produces The raw hydraulic loss of energy.Superhigh Pressure Hydraulic System in the prior art for the sealing of oil cylinder be using by system pressure by from oil It is introduced into sealing structure in cylinder, realizes the sealing of ultrahigh-pressure hydraulic cylinder.

Currently, the Chinese patent that notification number is CN207005299U discloses a kind of ultrahigh pressure cylinder seal assembly, including Sealed pressure oil interface is distributed in the support ring in support ring, cloth oil ring and sealing ring, be provided on the cloth oil ring with it is close The sealed pressure oil oil circuit of seal pressure oil orifice, the sealed pressure oil oil circuit is connected to the outer surface of cloth oil ring, in cloth The outer surface of oil ring also arranges that Circumferential oil groove and longitudinal oil groove, the longitudinal direction oil groove are connected to Circumferential oil groove.

In actual use, sealing ring is realized by pressure oil to be expanded this ultrahigh pressure cylinder seal assembly, thus It is pressed between inner wall of cylinder and piston, but in process of expansion, support ring does not follow the expansion of sealing ring and expands, when When sealing ring support is risen between inner wall of cylinder and piston, support ring is in a vacant state, in a high voltage state, the branch of airborne Pushing out ring is extremely easy the impact being under pressure and generates shaking, and seal assembly is be easy to cause to generate between inner wall of cylinder and piston The leakage of oil liquid is caused in gap.

Utility model content

The purpose of the utility model is to provide a kind of ultrahigh pressure cylinder seal assembly, have inner wall of cylinder and piston it Between, stablize the advantages of compressing support ring.

The above-mentioned technical purpose of the utility model has the technical scheme that

A kind of ultrahigh pressure cylinder seal assembly, including support ring, cloth oil ring and sealing ring, the cloth oil ring setting are supporting The outer ring side of ring, the sealing ring are coated on the outer surface of cloth oil ring, and the two sides of the support ring is respectively equipped with graphite bottom, The graphite bottom is equipped with bearing ring, and the bearing ring is higher than sealing ring.

By using above-mentioned technical proposal, when seal assembly is pressed between inner wall of cylinder and piston, graphite bottom by To extruding, since graphite has elasticity, so that bearing ring is pushed against between inner wall of cylinder and piston.Support ring is by holding The setting of pressure ring and graphite bottom can be pressed between inner wall of cylinder and piston, reached with this in inner wall of cylinder and piston Between, stablize the effect for compressing support ring.

Further, the graphite bottom is provided with several mounting holes along its circumferential surface, is equipped with and adds in the mounting hole Force spring.

By using above-mentioned technical proposal, reinforces pressure spring and further improve the elastic force of graphite bottom.So that pressure-bearing Ring can more effectively fit in inner wall of cylinder and piston, close between inner wall of cylinder and piston so as to improve bearing ring Sealing property.

Further, the surface of the support ring is provided with holding tank, and the bottom surface of the graphite bottom is located in holding tank.

By using above-mentioned technical proposal, when graphite bottom is pressurized and generates radial force, holding tank plays limitation and makees With a possibility that can reduce graphite bottom and generate displacement, be detached from support ring surface.

Further, the slot bottom of the holding tank is serrated.

By using above-mentioned technical proposal, the slot bottom of holding tank, which is serrated to be arranged, improves holding tank to graphite bottom It pulls, after further reduced graphite bottom by radial force with this, a possibility that disengaging from support ring.

Further, the one side that the bearing ring fits in graphite bottom is equipped with insertion graphite bottom positioning protrusion.

By using above-mentioned technical proposal, when bearing ring is pressed between inner wall of cylinder and piston, positioning protrusion is embedding Entering in graphite bottom, the setting of positioning protrusion reduces a possibility that relative motion is generated between bearing ring and graphite bottom, from And bearing ring is reduced due to a possibility that being generated displacement by radial force.

Further, the bearing ring is provided with annular groove, the annular groove along its circumferential surface away from the one side of graphite bottom It is interior to be equipped with the resistance ring made of graphite.

By using above-mentioned technical proposal, when bearing ring is pressed between inner wall of cylinder and piston, the fitting of resistance ring In inner wall of cylinder and piston, on the one hand, resistance ring improves frictional force of the bearing ring between inner wall of cylinder and piston, reduces A possibility that bearing ring generates displacement due to radial force, on the other hand, resistance ring is made of graphite, can further increase and hold Sealing performance of the pressure ring between inner wall of cylinder and piston.

Further, the resistance ring is successively wound by the graphite flake of M type.

By using above-mentioned technical proposal, the graphite flake of M type is according to there is bigger elasticity, by inner wall of cylinder and piston When compression, bounce can promote resistance ring to be closely fitted between inner wall of cylinder and piston.

Further, the resistance ring is equidistantly equipped with twice along the radial of support ring.

By using above-mentioned technical proposal, twice resistance ring can be born more balancedly from inner wall of cylinder and piston Pressure, reduce the pressure that single resistance ring is born, extend the service life of resistance ring.

In conclusion the utility model has the following beneficial effects: support ring passes through the setting of bearing ring and graphite bottom It can be pressed between inner wall of cylinder and piston, reached between inner wall of cylinder and piston with this, stablize and compress support ring Effect.

Detailed description of the invention

Fig. 1 is the structural schematic diagram for embodying the utility model；

Fig. 2 is the cross-sectional view for embodying connection relationship between each technical characteristic in the utility model.

In figure, 1, support ring；11, holding tank；2, cloth oil ring；21, sealing ring；3, graphite bottom；31, mounting hole；4, it holds Pressure ring；41, positioning protrusion；42, annular groove；5, pressure spring is reinforced；6, resistance ring.

Specific embodiment

The utility model is described in further detail below in conjunction with attached drawing.

Embodiment: a kind of ultrahigh pressure cylinder seal assembly, referring to Fig.1, including support ring 1, cloth oil ring 2(reference Fig. 2) and The outer ring side of support ring 1 is arranged in sealing ring 21, cloth oil ring 2, and sealing ring 21 is coated on the surface of cloth oil ring 2.Support ring 1 Two sides is respectively equipped with graphite bottom 3(referring to Fig. 2), and graphite bottom 3 is connected to support ring 1 by the mode being glued.At graphite bottom Bearing ring 4(is connected with referring to Fig. 2) by bonding mode on layer 3, and bearing ring 4 is higher than sealing ring 21.It is compacted in sealing ring 21 When between inner wall of cylinder and piston, graphite bottom 3 is deformed after being pressurized, and with this support ring 1 is pressed in cylinder barrel It between wall and piston, avoids support ring 1 and empties between inner wall of cylinder and piston, improve support ring 1 in use Stability.

Referring to Fig. 2, the surface of graphite bottom 3 is provided with several mounting holes 31, several mounting holes 31 along graphite bottom 3 circle Perimeter surface equidistantly opens up, and reinforcing pressure spring 5 is placed in mounting hole 31, and bearing ring 4 is fitted in graphite bottom 3 and reinforcing pressure spring On 5.During the work time, it reinforces pressure spring 5 and graphite bottom 3 cooperates jointly, can give bearing ring 4 bigger bounce, from And bearing ring 4 is closely fitted between inner wall of cylinder and piston.

Referring to Fig. 2, the surface of support ring 1 is provided with holding tank 11, and the slot bottom of holding tank 11 is serrated, graphite bottom 3 Bottom surface is located in holding tank 11.When the setting of holding tank 11 reduces graphite bottom 3 by radial force, the possibility of displacement is generated Property, while the bottom of holding tank 11 is serrated, and further improves the power of pullling to graphite bottom 3, has reached limitation with this The effect of 3 position of graphite bottom.

Referring to Fig. 2, the one side that bearing ring 4 fits in graphite bottom 3 is equipped with positioning protrusion 41, when bearing ring 4 is pressed in When between inner wall of cylinder and piston, positioning protrusion 41 is embedded in graphite bottom 3.Positioning protrusion 41 plays limitation bearing ring 4 and stone The relationship of relative position between black bottom 3, reduces bearing ring 4 in pressurized process, generates displacement relative to graphite bottom 3 Possibility.

Referring to Fig. 2, bearing ring 4 is provided with annular groove 42 along its circumferential surface away from the one side of graphite bottom 3, sets in annular groove 42 There is the resistance ring 6 made of graphite.The setting of resistance ring 6 can be improved friction of the bearing ring 4 between inner wall of cylinder and piston Power reduces bearing ring 4 due to a possibility that being generated displacement by radial force.Resistance ring 6 is made of graphite simultaneously, graphite tool There is excellent sealing performance, therefore leakproofness of the bearing ring 4 between inner wall of cylinder and piston can be further increased.

Referring to Fig. 2, resistance ring 6 is successively wound by the graphite flake of M type.M type have more excellent elasticity, with this into One step improves sealing performance of the resistance ring 6 between inner wall of cylinder and piston.Meanwhile in order to improve when bearing ring 4 is pressurized Uniformity, resistance ring 6 are equidistantly equipped with twice along the radial of support ring 1.

Concrete operating principle: when seal assembly is pressed between inner wall of cylinder and piston, bearing ring 4 is adjacent in cylinder barrel Wall and piston after graphite bottom 3 is by inner wall of cylinder and the compression of piston, generate screen resilience, so that bearing ring 4 be promoted to be closely attached on Inner wall of cylinder and piston.

At the same time, the reinforcing pressure spring 5 being arranged in graphite bottom 3 further improves the elastic force of graphite bottom 3, to make Obtaining bearing ring 4 can closely be adjacent between inner wall of cylinder and piston, further improve the leakproofness of bearing ring 4 Energy.

6 one side of resistance ring of 4 surface of bearing ring setting enables bearing ring 4 to be closely fitted in inner wall of cylinder Between piston, on the other hand, resistance ring 6 is made of the graphite flake of M type, itself has elastic force, by inner wall of cylinder and work When plug compresses, resistance ring 6 can be closely fitted between inner wall of cylinder and piston, thus further improve bearing ring 4 sealing performance.

This specific embodiment is only the explanation to the utility model, is not limitations of the present invention, ability Field technique personnel can according to need the modification that not creative contribution is made to the present embodiment after reading this specification, but As long as all by the protection of Patent Law in the scope of the claims of the utility model.

Claims (8)

1. a kind of ultrahigh pressure cylinder seal assembly, including support ring (1), cloth oil ring (2) and sealing ring (21), the cloth oil ring (2) it is arranged in the outer ring side of support ring (1), the sealing ring (21) is coated on the outer surface of cloth oil ring (2), and feature exists In: the two sides of the support ring (1) is respectively equipped with graphite bottom (3), and the graphite bottom (3) is equipped with bearing ring (4), described Bearing ring (4) is higher than sealing ring (21).

2. ultrahigh pressure cylinder seal assembly according to claim 1, it is characterised in that: the graphite bottom (3) is along it Circumferential surface is provided with several mounting holes (31), and reinforcing pressure spring (5) is equipped in the mounting hole (31).

3. ultrahigh pressure cylinder seal assembly according to claim 1, it is characterised in that: open on the surface of the support ring (1) Have holding tank (11), the bottom surface of the graphite bottom (3) is located in holding tank (11).

4. ultrahigh pressure cylinder seal assembly according to claim 3, it is characterised in that: the slot bottom of the holding tank (11) is in Zigzag.

5. ultrahigh pressure cylinder seal assembly according to claim 1, it is characterised in that: the bearing ring (4) fits in stone The one side of black bottom (3) is equipped with insertion graphite bottom (3) positioning protrusion (41).

6. ultrahigh pressure cylinder seal assembly according to claim 1, it is characterised in that: the bearing ring (4) deviates from graphite The one side of bottom (3) is provided with annular groove (42) along its circumferential surface, and the resistance ring made of graphite is equipped in the annular groove (42) (6)。

7. ultrahigh pressure cylinder seal assembly according to claim 6, it is characterised in that: the resistance ring (6) by M type stone Ink sheet is successively wound.

8. ultrahigh pressure cylinder seal assembly according to claim 6, it is characterised in that: the resistance ring (6) is along support The radial of ring (1) is equidistantly equipped with twice.