CN208702806U - A kind of sealing structure for oil cylinder of hydraulic support - Google Patents
A kind of sealing structure for oil cylinder of hydraulic support Download PDFInfo
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- CN208702806U CN208702806U CN201820999643.5U CN201820999643U CN208702806U CN 208702806 U CN208702806 U CN 208702806U CN 201820999643 U CN201820999643 U CN 201820999643U CN 208702806 U CN208702806 U CN 208702806U
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- cylinder barrel
- piston rod
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- end cap
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Abstract
The utility model discloses a kind of sealing structures for oil cylinder of hydraulic support, including cylinder barrel, one end of the cylinder barrel is enclosed construction, and the other end of cylinder barrel is hatch frame, cylinder barrel open end periphery is welded with convex edge, the internal activity of the cylinder barrel is equipped with piston, the piston is fixedly installed with piston rod on the one side far from cylinder barrel closed end, the one end of the piston rod far from piston extends to the outside of cylinder barrel through end cap, the inside of the end cap is inlaid with the axle sleeve being sleeved on outside piston rod, the axle sleeve is slidably connected with piston rod, the end cap is integrally formed with the boss that middle part has through-hole on the side of piston.The sealing structure stability is good, long service life, the hydraulic oil inside cylinder barrel can be effectively prevent to leak out the outside of cylinder barrel, it is ensured that the hydraulic oil inside cylinder barrel will not be by leaking out between end cap and convex edge, it is possible to reduce frequency of maintenance saves use cost.
Description
Technical field
The utility model belongs to technical field of hydraulic oil cylinder, is specifically related to a kind of sealing knot for oil cylinder of hydraulic support
Structure.
Background technique
Hydraulic cylinder abbreviation hydraulic cylinder, be hydraulic energy is changed into mechanical energy, do straight reciprocating motion (or swing fortune
It is dynamic) hydraulic actuator.Its structure is simple, reliable operation.Deceleration device when realizing reciprocating motion, can be removed from it, and
And there is no drive gap, movement is steady, therefore is used widely in the hydraulic system of various machinery.Hydraulic cylinder power output and
Piston effective area and its pressure difference on both sides are directly proportional；Hydraulic cylinder is substantially filled by cylinder barrel and cylinder cap, piston and piston rod, sealing
It sets, buffer unit and exhaust apparatus composition.
Sealing performance, the scheme for sealing of hydraulic cylinder in the prior art are reinforced in hydraulic cylinder oil leak in order to prevent
Have following several:
Chinese patent application 201620343098.5 discloses a kind of hydraulic using the medium-speed pulverizer of new type sealing device
Cylinder, as shown in Figure 1 comprising hydraulic cylinder body and hydraulic cylinder piston rod, the company of the hydraulic cylinder body and hydraulic cylinder piston rod
The place of connecing is equipped with external sealing device, sliding sleeve and fixing sleeve including being set on hydraulic cylinder piston rod, the lower end of fixing sleeve
It is connect with hydraulic cylinder body, the both ends of sliding sleeve pass through retaining ring respectively and are fixed on hydraulic cylinder piston rod and fixing sleeve.The skill
Art scheme is sealed by a set of external ram increased on the basis of original sealing, thoroughly solves hydraulic oil system entrance
The deterioration of oil caused by coal dust, dust, hydraulic cylinder piston and bad seals frequently adjust failure, Maintenance and Repair heavy workload
The problems such as.
Chinese patent application 201320040658.6 discloses a kind of hydraulic cylinder rod sealing device, as shown in Figure 2 comprising
Cylinder barrel, piston, piston rod, cylinder cap, oil inlet, piston seal, flexible combination sealing element and oil outlet, piston rod pass through flexibility
Combination seal is matched with piston, and piston is matched by piston seal with cylinder barrel, and cylinder barrel both ends are provided with cylinder cap, cylinder
It covers and is respectively arranged with oil inlet and oil outlet.Technical solution use is steady safe and reliable, reduces leakage, improves piston cylinder
Efficiency, also considerably increase the service life of oil cylinder.
But the sealing structure of hydraulic cylinder in the prior art and unreliable, stability is not so good, and there is also leakages
Problem, cannot be fully sealed, and thus cause oil cylinder service life short, be easy oil leak, need to be regularly maintained, increase making for user
Use cost.
Utility model content
The purpose of this utility model is to provide a kind of sealing structures for oil cylinder of hydraulic support, and stability is good, use
Service life is long, the hydraulic oil inside cylinder barrel can be effectively prevent to leak out the outside of cylinder barrel, it is ensured that the hydraulic oil inside cylinder barrel will not lead to
It crosses between end cap and convex edge and leaks out, it is possible to reduce frequency of maintenance saves use cost, mentioned above in the background art to solve
Problem.
To achieve the above object, the utility model provides the following technical solutions: a kind of sealing for oil cylinder of hydraulic support
Structure, including cylinder barrel, one end of the cylinder barrel is enclosed construction, and the other end of cylinder barrel is hatch frame, the cylinder barrel opening
End periphery is welded with convex edge, is equipped with end cap by bolt on the convex edge, the internal activity of the cylinder barrel is equipped with piston, institute
It states and is fixedly installed with piston rod on one side of the piston far from cylinder barrel closed end, the one end of the piston rod far from piston is through end
Lid extends to the outside of cylinder barrel, and the inside of the end cap is inlaid with the axle sleeve being sleeved on outside piston rod, the axle sleeve and piston
Bar is slidably connected, and the end cap is integrally formed with the boss that middle part has through-hole on the side of piston, and the boss is set in
The outside of piston rod, and symmetrically opened up on the inner surface of boss there are two annular slot, the inside of two annular slots is equal
It is connected with first annular rubber seal, the inner sidewall of the first annular rubber seal offsets with the outside of piston rod
Touching.
Preferably, the first dome-type groove, the convex edge and end cap are offered on the side that the end cap is contacted with convex edge
Offer the second dome-type groove on the side of contact, the center of circle of the first dome-type groove and the second dome-type groove is mutually overlapped
It closes, and is connected with the second ring-shaped rubber sealing ring between the first dome-type groove and the second dome-type groove.
Preferably, the bolt is socket cap hexagon socket head cap screw.
Preferably, the longitudinal section of the first annular rubber seal is rectangular, the second ring-shaped rubber sealing ring
Longitudinal section is round or oval.
Preferably, the longitudinal section diameter of the second ring-shaped rubber sealing ring is not less than the diameter of the first dome-type groove.
Preferably, the diameter of the through-hole in the middle part of the boss is not less than the diameter of piston rod.
Preferably, the inside surface roughness of the cylinder barrel, the surface roughness of piston, piston rod surface roughness and first
The surface roughness of ring-shaped rubber sealing ring, axle sleeve inside surface roughness no more than Ra0.2.
Preferably, the first annular rubber seal is identical with the material of the second ring-shaped rubber sealing ring, is
(NBR) nitrile rubber.
Preferably, the material of the first annular rubber seal is NBR nitrile rubber, the sealing of the second ring-shaped rubber
The material of circle is silicon rubber.
Preferably, in order to improve sealing effect, the slot cross-section product of the annular slot is B1, first annular rubber seal
The sectional area of circle is B2,1.1≤B2/B1≤1.3.
Preferably, placement the second ring-shaped rubber sealing ring that the first dome-type groove and the second dome-type groove are formed
Slot cross-section product be A1, the sectional area of the second ring-shaped rubber sealing ring is A2,1.2≤A2/A1≤1.6.Further, in order to
Realize that staged seals step by step, B2/B1≤A2/A1.
Preferably, the Young's modulus of lasticity E 1 of the nitrile rubber is 0.25-0.34MPa, and tensile strength R is 25.5-
27.8MPa.Further, 6.4≤E1R≤9.5.
Preferably, in order to further realize the sealing effect of hydraulic cylinder, the slot cross-section product B1 of the annular slot, the
The annular rubber of the placement second that the sectional area B2 of one ring-shaped rubber sealing ring, the first dome-type groove and the second dome-type groove are formed
Slot cross-section product A1, the sectional area A2 of the second ring-shaped rubber sealing ring, the Young's modulus of lasticity E 1 of nitrile rubber, drawing of glue sealing ring
It stretches and meets following relationship between intensity R:
Wherein, μ is adjustment factor, value range 6.3-9.5；Above formula only carries out numerical operation, is not related to unit-distance code.
Compared with prior art, the utility model has the beneficial effects that
1, the sealing structure for oil cylinder of hydraulic support of the utility model, is inlaid with by the inside in end cap and is sleeved on
Axle sleeve outside piston rod, axle sleeve are slidably connected with piston rod, by using above-mentioned technical proposal, it is ensured that piston rod is stable
It is flexible, so that the sealing structure stability is good, long service life；
2, the sealing structure for oil cylinder of hydraulic support of the utility model, by one on side of the end cap close to piston
Body is equipped with the boss that middle part has through-hole, and boss is set in the outside of piston rod, and two are symmetrically offered on the inner surface of boss
A annular slot, the inside of two annular slots are connected with first annular rubber seal, first annular rubber seal
Inner sidewall is inconsistent with the outside of piston rod, by using above-mentioned technical proposal, the hydraulic oil that can be effectively prevent inside cylinder barrel
Leak out the outside of cylinder barrel；
3, the sealing structure for oil cylinder of hydraulic support of the utility model, by the side that end cap is contacted with convex edge
The first dome-type groove is offered, the second dome-type groove is offered on the side that convex edge is contacted with end cap, the first dome-type is recessed
The center of circle of slot and the second dome-type groove coincides, and is connected with second between the first dome-type groove and the second dome-type groove
Ring-shaped rubber sealing ring can increase the leakproofness between end cap and convex edge by using above-mentioned technical proposal, to guarantee cylinder barrel
Internal hydraulic oil will not be by leaking out between end cap and convex edge；
4, the sealing structure for oil cylinder of hydraulic support of the utility model has double sealing structure, can effectively prevent
Oil cylinder oil leak, so that oil cylinder service life is longer, performance is stablized, and reduces frequency of maintenance, saves use cost；
5, the sealing structure for oil cylinder of hydraulic support of the utility model, by be arranged first annular rubber seal,
The relationship for the aerial cross sectional that second ring-shaped rubber sealing ring is prevented with it, preferably to improve sealing performance；
6, the sealing structure for oil cylinder of hydraulic support of the utility model, long-pending by the slot cross-section of setting annular slot,
The annular rubber of the placement second that the sectional area of first annular rubber seal, the first dome-type groove and the second dome-type groove are formed
The slot cross-section product of glue sealing ring, the sectional area of the second ring-shaped rubber sealing ring, the Young's modulus of elasticity of nitrile rubber, tensile strength
Between, to further realize the sealing effect of hydraulic cylinder.
Detailed description of the invention
Fig. 1 is a kind of hydraulic cylinder schematic diagram using new type sealing device in the prior art；
Fig. 2 is a kind of hydraulic cylinder rod sealing device schematic diagram in the prior art；
Fig. 3 is the sealed structural schematic diagram for oil cylinder of hydraulic support of the utility model；
Fig. 4 is the sealing structure cross-sectional view for oil cylinder of hydraulic support of the utility model；
Fig. 5 is the sealing structure partial section enlarged view for oil cylinder of hydraulic support of the utility model.
In Fig. 3-5: 1, cylinder barrel；2, convex edge；3, end cap；4, piston rod；5, bolt；6, the second ring-shaped rubber sealing ring；7,
Axle sleeve；8, piston；9, the first dome-type groove；10, the second dome-type groove；11, boss；12, annular slot；13, the first ring
Shape rubber seal.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, fall within the protection scope of the utility model.
Embodiment 1
Please refer to Fig. 3-5, a kind of sealing structure for oil cylinder of hydraulic support, including cylinder barrel 1, one end of the cylinder barrel 1
For enclosed construction, and the other end of cylinder barrel 1 is hatch frame, and the 1 open end periphery of cylinder barrel is welded with convex edge 2, the convex edge 2
Upper to be equipped with end cap 3 by bolt 5, the internal activity of the cylinder barrel 1 is equipped with piston 8, and the piston 8 is closed far from cylinder barrel 1
Piston rod 4 is fixedly installed on the one side at end, the one end of the piston rod 4 far from piston 8 extends to cylinder barrel 1 through end cap 3
Outside, the inside of the end cap 3 is inlaid with the axle sleeve 7 being sleeved on outside piston rod 4, and the axle sleeve 7 is slided with piston rod 4
Connection, the end cap 3 are integrally formed with the boss 11 that middle part has through-hole on the side of piston 8, which lives for interspersed
Stopper rod 4, the boss 11 are set in the outside of piston rod 4, and are symmetrically opened up on the inner surface of boss 11 there are two annular slot
12, the inside of two annular slots 12 is connected with first annular rubber seal 13.The first annular rubber seal
The inner sidewall of circle 13 is inconsistent with the outside of piston rod 4.
The bolt 5 is socket cap hexagon socket head cap screw, convenient for operating the bolt 5 by allen wrench, by convex edge 2 and end
Lid 3 is fixedly installed togather.
The longitudinal section of the first annular rubber seal 13 be it is rectangular, the vertical of the second ring-shaped rubber sealing ring 6 cuts
Face is circle, and first annular rubber seal 13 makes the sealing performance between boss 11 and piston rod 4 preferable, the second annular rubber
Glue sealing ring 6 makes the sealing performance between convex edge 2 and end cap 3 preferable.
The longitudinal section diameter of the second ring-shaped rubber sealing ring 6 is not less than the diameter of the first dome-type groove 9, can make
The surface for obtaining the first dome-type groove 9 and the inner surface and the second ring-shaped rubber sealing ring 6 of the second dome-type groove 10 is mutually tight
Contiguity touching so that the sealing performance between convex edge 2 and end cap 3 is preferable, hydraulic oil cylinder barrel 1 inside can be prevented by end cap 3 and
It is leaked out between convex edge 2.
The diameter of the through-hole at 11 middle part of the boss is not less than the diameter of piston rod 4, can prevent the surface of piston rod 4 with
The inner wall of the interior bone of boss 11 generates friction, avoids the smoothness for influencing 4 surface of piston rod, be effectively ensured piston rod 4 with
Leakproofness between axle sleeve 7 and first annular rubber seal 13.
The inside surface roughness of the cylinder barrel 1, the surface roughness of piston 8,4 surface roughness of piston rod and first annular
The surface roughness of rubber seal 13,7 inside surface roughness of axle sleeve no more than Ra0.2, can reduce cylinder barrel 1, piston 8,
The abrasion of piston rod 4, first annular rubber seal 13, axle sleeve 7, while can guarantee the leakproofness between cylinder barrel 1 and piston 8
Sealing performance, axle sleeve 7 between energy, piston rod 4 and first annular rubber seal 13 and the sealing performance between piston rod 4.
Working principle: this is used for the sealing structure of oil cylinder of hydraulic support, is sleeved on work by being inlaid in the inside of end cap 3
Axle sleeve 7 outside stopper rod 4, axle sleeve 7 are slidably connected with piston rod 4, it is ensured that piston rod 4 is stable to be stretched, so that the sealing knot
Structure stability is good, long service life；By being integrally formed with the boss that middle part has through-hole on the side of piston 8 in end cap 3
11, boss 11 is set in the outside of piston rod 4, and is symmetrically opened up on the inner surface of boss 11 there are two annular slot 12, two
The inside of annular slot 12 is connected with first annular rubber seal 13, the inner sidewall of first annular rubber seal 13 with
The outside of piston rod 4 is inconsistent, and the hydraulic oil inside cylinder barrel 1 can be effectively prevent to leak out the outside of cylinder barrel 1；By end cap 3 with
The first dome-type groove 9 is offered on the side that convex edge 2 contacts, the second half are offered on the side that convex edge 2 is contacted with end cap 3
The center of circle of ball-type groove 10, the first dome-type groove 9 and the second dome-type groove 10 coincides, and 9 He of the first dome-type groove
It is connected with the second ring-shaped rubber sealing ring 6 between second dome-type groove 10, the leakproofness between end cap 3 and convex edge 2 can be increased,
To guarantee that the hydraulic oil inside cylinder barrel 1 will not be by leaking out between end cap 3 and convex edge 2.
Embodiment 2
Please refer to Fig. 3-5, a kind of sealing structure for oil cylinder of hydraulic support, including cylinder barrel 1, one end of the cylinder barrel 1
For enclosed construction, and the other end of cylinder barrel 1 is hatch frame, and the 1 open end periphery of cylinder barrel is welded with convex edge 2, the convex edge 2
Upper to be equipped with end cap 3 by bolt 5, the internal activity of the cylinder barrel 1 is equipped with piston 8, and the piston 8 is closed far from cylinder barrel 1
Piston rod 4 is fixedly installed on the one side at end, the one end of the piston rod 4 far from piston 8 extends to cylinder barrel 1 through end cap 3
Outside, the inside of the end cap 3 is inlaid with the axle sleeve 7 being sleeved on outside piston rod 4, and the axle sleeve 7 is slided with piston rod 4
Connection, the end cap 3 are integrally formed with the boss 11 that middle part has through-hole on the side of piston 8, which lives for interspersed
Stopper rod 4, the boss 11 are set in the outside of piston rod 4, and are symmetrically opened up on the inner surface of boss 11 there are two annular slot
12, the inside of two annular slots 12 is connected with first annular rubber seal 13.The first annular rubber seal
The inner sidewall of circle 13 is inconsistent with the outside of piston rod 4.
The first dome-type groove 9 is offered on the side that the end cap 3 is contacted with convex edge 2, the convex edge 2 connects with end cap 3
The second dome-type groove 10, the center of circle of the first dome-type groove 9 and the second dome-type groove 10 are offered on the side of touching
It coincides, and is connected with the second ring-shaped rubber sealing ring 6 between the first dome-type groove 9 and the second dome-type groove 10.
The bolt 5 is socket cap hexagon socket head cap screw, convenient for operating the bolt 5 by allen wrench, by convex edge 2 and end
Lid 3 is fixedly installed togather.
The longitudinal section of the first annular rubber seal 13 be it is rectangular, the vertical of the second ring-shaped rubber sealing ring 6 cuts
Face is ellipse, and first annular rubber seal 13 makes the sealing performance between boss 11 and piston rod 4 preferable, the second annular
Rubber seal 6 makes the sealing performance between convex edge 2 and end cap 3 preferable.
The longitudinal section diameter of the second ring-shaped rubber sealing ring 6 is not less than the diameter of the first dome-type groove 9, can make
The surface for obtaining the first dome-type groove 9 and the inner surface and the second ring-shaped rubber sealing ring 6 of the second dome-type groove 10 is mutually tight
Contiguity touching so that the sealing performance between convex edge 2 and end cap 3 is preferable, hydraulic oil cylinder barrel 1 inside can be prevented by end cap 3 and
It is leaked out between convex edge 2.
The diameter of the through-hole at 11 middle part of the boss is not less than the diameter of piston rod 4, can prevent the surface of piston rod 4 with
The inner wall of the interior bone of boss 11 generates friction, avoids the smoothness for influencing 4 surface of piston rod, be effectively ensured piston rod 4 with
Leakproofness between axle sleeve 7 and first annular rubber seal 13.
The inside surface roughness of the cylinder barrel 1, the surface roughness of piston 8,4 surface roughness of piston rod and first annular
The surface roughness of rubber seal 13,7 inside surface roughness of axle sleeve no more than Ra0.2, can reduce cylinder barrel 1, piston 8,
The abrasion of piston rod 4, first annular rubber seal 13, axle sleeve 7, while can guarantee the leakproofness between cylinder barrel 1 and piston 8
Sealing performance, axle sleeve 7 between energy, piston rod 4 and first annular rubber seal 13 and the sealing performance between piston rod 4.
The first annular rubber seal is identical with the material of the second ring-shaped rubber sealing ring, is nitrile rubber.
In order to improve sealing effect, the slot cross-section product of the annular slot is B1, and first annular rubber seal is cut
Area is B2,1.1≤B2/B1≤1.3.
The slot for placement the second ring-shaped rubber sealing ring that the first dome-type groove and the second dome-type groove are formed is cut
Area is A1, and the sectional area of the second ring-shaped rubber sealing ring is A2,1.2≤A2/A1≤1.6.Further, in order to realize ladder
Formula seals step by step, B2/B1≤A2/A1.
The Young's modulus of lasticity E 1 of the nitrile rubber is 0.25-0.34MPa, and tensile strength R is 25.5-
27.8MPa.Further, 6.4≤E1R≤9.5.
Embodiment 3
Please refer to Fig. 3-5, a kind of sealing structure for oil cylinder of hydraulic support, including cylinder barrel 1, one end of the cylinder barrel 1
For enclosed construction, and the other end of cylinder barrel 1 is hatch frame, and the 1 open end periphery of cylinder barrel is welded with convex edge 2, the convex edge 2
Upper to be equipped with end cap 3 by bolt 5, the internal activity of the cylinder barrel 1 is equipped with piston 8, and the piston 8 is closed far from cylinder barrel 1
Piston rod 4 is fixedly installed on the one side at end, the one end of the piston rod 4 far from piston 8 extends to cylinder barrel 1 through end cap 3
Outside, the inside of the end cap 3 is inlaid with the axle sleeve 7 being sleeved on outside piston rod 4, and the axle sleeve 7 is slided with piston rod 4
Connection, the end cap 3 are integrally formed with the boss 11 that middle part has through-hole on the side of piston 8, which lives for interspersed
Stopper rod 4, the boss 11 are set in the outside of piston rod 4, and are symmetrically opened up on the inner surface of boss 11 there are two annular slot
12, the inside of two annular slots 12 is connected with first annular rubber seal 13.The first annular rubber seal
The inner sidewall of circle 13 is inconsistent with the outside of piston rod 4.
The first dome-type groove 9 is offered on the side that the end cap 3 is contacted with convex edge 2, the convex edge 2 connects with end cap 3
The second dome-type groove 10, the center of circle of the first dome-type groove 9 and the second dome-type groove 10 are offered on the side of touching
It coincides, and is connected with the second ring-shaped rubber sealing ring 6 between the first dome-type groove 9 and the second dome-type groove 10.
The bolt 5 is socket cap hexagon socket head cap screw, convenient for operating the bolt 5 by allen wrench, by convex edge 2 and end
Lid 3 is fixedly installed togather.
The longitudinal section of the first annular rubber seal 13 be it is rectangular, the vertical of the second ring-shaped rubber sealing ring 6 cuts
Face is circle, and first annular rubber seal 13 makes the sealing performance between boss 11 and piston rod 4 preferable, the second annular rubber
Glue sealing ring 6 makes the sealing performance between convex edge 2 and end cap 3 preferable.
The longitudinal section diameter of the second ring-shaped rubber sealing ring 6 is not less than the diameter of the first dome-type groove 9, can make
The surface for obtaining the first dome-type groove 9 and the inner surface and the second ring-shaped rubber sealing ring 6 of the second dome-type groove 10 is mutually tight
Contiguity touching so that the sealing performance between convex edge 2 and end cap 3 is preferable, hydraulic oil cylinder barrel 1 inside can be prevented by end cap 3 and
It is leaked out between convex edge 2.
The diameter of the through-hole at 11 middle part of the boss is not less than the diameter of piston rod 4, can prevent the surface of piston rod 4 with
The inner wall of the interior bone of boss 11 generates friction, avoids the smoothness for influencing 4 surface of piston rod, be effectively ensured piston rod 4 with
Leakproofness between axle sleeve 7 and first annular rubber seal 13.
The inside surface roughness of the cylinder barrel 1, the surface roughness of piston 8,4 surface roughness of piston rod and first annular
The surface roughness of rubber seal 13,7 inside surface roughness of axle sleeve no more than Ra0.2, can reduce cylinder barrel 1, piston 8,
The abrasion of piston rod 4, first annular rubber seal 13, axle sleeve 7, while can guarantee the leakproofness between cylinder barrel 1 and piston 8
Sealing performance, axle sleeve 7 between energy, piston rod 4 and first annular rubber seal 13 and the sealing performance between piston rod 4.
The first annular rubber seal is identical with the material of the second ring-shaped rubber sealing ring, is nitrile rubber.
In order to improve sealing effect, the slot cross-section product of the annular slot is B1, and first annular rubber seal is cut
Area is B2,1.1≤B2/B1≤1.3.
The slot for placement the second ring-shaped rubber sealing ring that the first dome-type groove and the second dome-type groove are formed is cut
Area is A1, and the sectional area of the second ring-shaped rubber sealing ring is A2,1.2≤A2/A1≤1.6.Further, in order to realize ladder
Formula seals step by step, B2/B1≤A2/A1.
The Young's modulus of lasticity E 1 of the nitrile rubber is 0.25-0.34MPa, and tensile strength R is 25.5-
27.8MPa.Further, 6.4≤E1R≤9.5.
It is the slot cross-section product B1 of the annular slot, first annular in order to further realize the sealing effect of hydraulic cylinder
The second ring-shaped rubber of placement sealing that the sectional area B2 of rubber seal, the first dome-type groove and the second dome-type groove are formed
Slot cross-section the product A1, the sectional area A2 of the second ring-shaped rubber sealing ring, the Young's modulus of lasticity E 1 of nitrile rubber, tensile strength of circle
Meet following relationship between R:
Wherein, μ is adjustment factor, value range 6.3-9.5；Above formula only carries out numerical operation, is not related to unit-distance code.
While there has been shown and described that the embodiments of the present invention, for the ordinary skill in the art,
It is understood that these embodiments can be carried out with a variety of variations in the case where not departing from the principles of the present invention and spirit, repaired
Change, replacement and variant, the scope of the utility model is defined by the appended claims and the equivalents thereof.
Claims (6)
1. a kind of sealing structure for oil cylinder of hydraulic support, it is characterised in that: the sealing structure includes cylinder barrel (1), the cylinder
One end of cylinder (1) is enclosed construction, and the other end of cylinder barrel (1) is hatch frame, and cylinder barrel (1) the open end periphery is welded with
Convex edge (2) is equipped with end cap (3) on the convex edge (2) by bolt (5), and the internal activity of the cylinder barrel (1) is equipped with piston
(8), for the piston (8) far from being fixedly installed with piston rod (4) on the one side of cylinder barrel (1) closed end, the piston rod (4) is remote
One end from piston (8) extends to the outside of cylinder barrel (1) through end cap (3), and the inside of the end cap (3), which is inlaid with, is sleeved on work
The external axle sleeve (7) of stopper rod (4), the axle sleeve (7) are slidably connected with piston rod (4), and the end cap (3) is close to piston (8)
The boss (11) that middle part has through-hole is integrally formed on side, the boss (11) is set in the outside of piston rod (4), and boss
(11) it is symmetrically opened up on inner surface there are two annular slot (12), the inside of two annular slots (12) is connected with the
One ring-shaped rubber sealing ring (13), external phase of the inner sidewall of the first annular rubber seal (13) with piston rod (4)
It contradicts；The first dome-type groove (9), the convex edge (2) and end are offered on the side that the end cap (3) contacts with convex edge (2)
The second dome-type groove (10) is offered on the side of lid (3) contact, the first dome-type groove (9) and the second dome-type are recessed
The center of circle of slot (10) coincides, and the second annular is connected between the first dome-type groove (9) and the second dome-type groove (10)
Rubber seal (6).
2. a kind of sealing structure for oil cylinder of hydraulic support according to claim 1, it is characterised in that: the bolt
It (5) is socket cap hexagon socket head cap screw.
3. a kind of sealing structure for oil cylinder of hydraulic support according to claim 1, it is characterised in that: first ring
The longitudinal section of shape rubber seal (13) is rectangular.
4. a kind of sealing structure for oil cylinder of hydraulic support according to claim 1, it is characterised in that: second ring
The longitudinal section of shape rubber seal (6) is round or oval.
5. a kind of sealing structure for oil cylinder of hydraulic support according to claim 1, it is characterised in that: the boss
(11) diameter of the through-hole in the middle part of is not less than the diameter of piston rod (4).
6. a kind of sealing structure for oil cylinder of hydraulic support according to claim 1, it is characterised in that: the cylinder barrel
(1) surface roughness, piston rod (4) surface roughness and the first annular rubber seal of inside surface roughness, piston (8)
(13) surface roughness, axle sleeve (7) inside surface roughness no more than Ra0.2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820999643.5U CN208702806U (en) | 2018-06-27 | 2018-06-27 | A kind of sealing structure for oil cylinder of hydraulic support |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820999643.5U CN208702806U (en) | 2018-06-27 | 2018-06-27 | A kind of sealing structure for oil cylinder of hydraulic support |
Publications (1)
| Publication Number | Publication Date |
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| CN208702806U true CN208702806U (en) | 2019-04-05 |
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ID=65936687
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820999643.5U Expired - Fee Related CN208702806U (en) | 2018-06-27 | 2018-06-27 | A kind of sealing structure for oil cylinder of hydraulic support |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112268033A (en) * | 2020-09-21 | 2021-01-26 | 蚌埠隆华压铸机有限公司 | Internal leakage prevention device for hydraulic system of die casting machine |
| CN114109964A (en) * | 2021-11-24 | 2022-03-01 | 侯祖刚 | Hydraulic cylinder top cap and oil cylinder connecting structure |
| CN118088519A (en) * | 2024-04-17 | 2024-05-28 | 合肥倍豪海洋装备技术有限公司 | Power mechanism for large sealing ring test fixture |
-
2018
- 2018-06-27 CN CN201820999643.5U patent/CN208702806U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112268033A (en) * | 2020-09-21 | 2021-01-26 | 蚌埠隆华压铸机有限公司 | Internal leakage prevention device for hydraulic system of die casting machine |
| CN114109964A (en) * | 2021-11-24 | 2022-03-01 | 侯祖刚 | Hydraulic cylinder top cap and oil cylinder connecting structure |
| CN118088519A (en) * | 2024-04-17 | 2024-05-28 | 合肥倍豪海洋装备技术有限公司 | Power mechanism for large sealing ring test fixture |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
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Granted publication date: 20190405 Termination date: 20200627 |