CN209146036U - A kind of piston assembly for hydraulic cylinder - Google Patents
A kind of piston assembly for hydraulic cylinder Download PDFInfo
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- CN209146036U CN209146036U CN201822020809.7U CN201822020809U CN209146036U CN 209146036 U CN209146036 U CN 209146036U CN 201822020809 U CN201822020809 U CN 201822020809U CN 209146036 U CN209146036 U CN 209146036U
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- sealing ring
- ring
- blind hole
- seal
- rubber pad
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Abstract
The utility model relates to a kind of piston assemblies for hydraulic cylinder.Its technical solution is: the piston assembly is made of support ring (1), seal ring assembly (2), sealing ring (3) and piston (4).Seal groove (6) are provided at the center of two supports annular groove (5) of piston (4), the bottom of seal groove (6) is equipped with sealing ring (3), and the outer wall for being close to sealing ring (3) is set with seal ring assembly (2).Seal ring assembly (2) is the complete circular ring shape being made of sealing ring (7) and rubber pad (8), the outer wall of sealing ring (7) is equably provided with big-diameter blind hole, big-diameter blind hole is located on the center line of sealing ring (7), passes through the big-diameter blind hole hole heart and with sealing ring (7) center line in positive 45 ° and in having 2 small blind holes on minus 45 ° of directions；Sealing ring (3) is annulus breakaway-element.The utility model has the characteristics that small frictional force, high frequency sound, can bear high pressure, good seal performance, long working life, energy adjust automatically seal clearance and convenient for disassembly and assembly, the hydraulic cylinder suitable for high pressure low friction.
Description
Technical field
The utility model belongs to the piston technical field of hydraulic cylinder.More particularly to a kind of piston in combination for hydraulic cylinder
Part.
Background technique
At present in some hydraulic cylinders, in order to reduce friction using permanent clearance seal, but this sealing is due between presence
Gap, thus cannot prevent completely leak, when piston pressure at both sides difference is larger, cause leakage rate big, so that the volume of hydraulic cylinder
Efficiency reduces, therefore sealing performance is poor, and furthermore this sealing has the geometry and surface processing accuracy of part higher
It is required that and can not be compensated automatically after abrasion.
It is sealed using Glais ring, and must require to manufacture in strict accordance with hydraulic cylinder size, and its elasticity is small and difficult to install,
After sealing part abrasion, it is difficult the seal clearance of compensation abrasion, if the oil film of sealing element and inner wall of cylinder is broken when cooperation tension
Bad to will increase frictional force instead, general structure is also it is difficult to ensure that the greasy property of seal clearance.
Summary of the invention
The utility model is intended to overcome above-mentioned technological deficiency, it is therefore an objective to provide a kind of small frictional force, high frequency sound, can bear height
Pressure, good seal performance, long working life, energy adjust automatically seal clearance and the piston in combination for hydraulic cylinder convenient for disassembly and assembly
Part.
To achieve the goals above, the technical solution adopted in the utility model is: the piston assembly of hydraulic cylinder is by supporting
Ring, seal ring assembly, sealing ring and piston composition.
It is symmetrically provided with support annular groove at two sides on the cylindrical surface of piston, is respectively provided with branch in two support annular grooves
Carrier ring；Support annular groove width and support ring it is of same size, support the depth of annular groove identical as the thickness of support ring.
Seal groove is provided at the center of two support annular grooves of piston, the bottom of seal groove is equipped with sealing ring, is close to close
The outer wall of seal ring is set with seal ring assembly；The width of seal groove and the width of sealing ring and seal ring assembly it is of same size,
The depth of seal groove is the sum of thickness and thickness of seal ring assembly of sealing ring.
Seal ring assembly is the complete circular ring shape being made of sealing ring and rubber pad, and the arc length of rubber pad is described complete
Annular 0.005~0.01 times；Sealing ring cross-section is rectangle, and the section of rubber pad and the section of sealing ring are identical.
The one end for the sealing ring being connected with rubber pad is concave curved surface, and the other end is convex surface, and the spill of sealing ring is bent
The intersection of the outer wall of face and convex surface and sealing ring is arc-shaped, and the arc curvature radius at sealing ring both ends is that sealing ring is wide
0.5~0.55 times of degree；One end with the rubber pad of sealing ring linking is corresponding convex surface, and the other end is corresponding spill
The intersection of curved surface, the outer wall of the concave curved surface and convex surface and rubber pad of rubber pad is arc-shaped, the arc at rubber pad both ends
Radius of curvature is 0.5~0.55 times of rubber pad width.
It is equably provided with big-diameter blind hole in the outer wall of sealing ring, big-diameter blind hole is located on the center line of sealing ring, between big-diameter blind hole
Away from 3.5~4 times for sealing ring width；Across the big-diameter blind hole hole heart and with sealing ring center line in positive 45 ° and on minus 45 ° of directions
Have 2 small blind holes, each small blind hole between adjacent small blind hole at a distance from be 0.6~0.7 times of sealing ring width.
Sealing ring is annulus breakaway-element, and one end of gap is concave curved surface, and the other end is convex surface, sealing ring it is recessed
The intersection of the outer wall of shape curved surface and convex surface and sealing ring is arc, and the arc curvature radius at sealing ring both ends is sealing
0.5~0.55 times of ring width；Two sides of sealing ring are symmetrical annular concave curved surface；The cross section of annular concave curved surface
Arc-shaped, the arc curvature radius of sealing ring two sides is 0.5~0.55 times of thickness of sealing ring.
0.5~0.6 times with a thickness of seal groove depth of the sealing ring, the material of the sealing ring are aluminium bronze
Material.
0.4~0.5 times with a thickness of seal groove depth of the sealing ring；The material of sealing ring is fluorubber.
The material of the rubber pad is fluorubber.
The diameter of the big-diameter blind hole is 0.15~0.2 times of sealing ring width, and the depth of big-diameter blind hole is sealing ring thickness
0.16~0.18 times.
The diameter of the small blind hole is 0.1~0.15 times of sealing ring width, and the depth of small blind hole is sealing ring thickness
0.1~0.15 times.
Due to the adoption of the above technical scheme, compared to the prior art the utility model has the advantage that
(1) the utility model machined multiple groups blind hole in sealing ring outer wall, and every group of blind hole is by four small blind holes and one
Big-diameter blind hole forms, and has hydraulic oil in every group of blind hole, as the piston moves, the hydraulic oil in blind hole is carried over, automatically in work
Oil film is formed in plug and inner wall of cylinder gap, reduces frictional force, lubrication and sealing performance are more preferable.
(2) the utility model is machined with concave curved surface in the two sides of sealing ring, and under high pressure oil effect, lip is outward
It opens, hydraulic fluid pressure is higher, and lip is more opened, so that hydraulic cylinder can also enhance sealing performance when bearing high pressure.
(3) the utility model is equipped with one piece of rubber pad in the incision position of sealing ring, and high pressure oil can not only be prevented disconnected from circle
Opening leaks, and it is easy to disassemble.
(4) material of the sealing ring of the utility model is the aluminium bronze with certain flexible deformation, and coefficient of friction is small,
The response frequency that can accelerate hydraulic cylinder, when there is small abrasion on its surface, since sealing ring is to disconnect, so can freely outward
Expansion is compensated by the gap of small abrasion with this, improves sealing ring working life, and adjust automatically seal clearance, prevent
Leakage.
Therefore, the utility model have frictional force is small, high frequency sound, can bear high pressure, good seal performance, long working life,
Energy adjust automatically seal clearance and feature convenient for disassembly and assembly, the hydraulic cylinder suitable for high pressure low friction.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of the utility model；
Fig. 2 is the structural schematic diagram of piston 4 in Fig. 1；
Fig. 3 is the partial enlargement diagram of I in Fig. 1；
Fig. 4 is the structural schematic diagram of seal ring assembly 2 in Fig. 1；
Fig. 5 is the expanded schematic diagram of seal ring assembly 2 in Fig. 3；
Fig. 6 be Fig. 5 in A-A to view schematic diagram；
Fig. 7 is that the B-B direction in Fig. 5 regards schematic diagram；
Fig. 8 is the schematic shapes of sealing ring 3 in Fig. 1；
Fig. 9 is the expanded schematic diagram of sealing ring 3 in Fig. 3；
Figure 10 be Fig. 9 in C-C to view schematic diagram.
Specific embodiment
The utility model is further described with reference to the accompanying drawings and detailed description, not to its protection scope
Limitation.
Embodiment 1
A kind of piston assembly for hydraulic cylinder.The piston assembly of hydraulic cylinder is by support ring 1, seal ring assembly 2, close
Seal ring 3 and piston 4 form.
As depicted in figs. 1 and 2, support annular groove 5, two branch are symmetrically provided at two sides on the cylindrical surface of piston 4
Support ring 1 is respectively provided in pushing out ring slot 5；Support annular groove 5 width and support ring 1 it is of same size, support annular groove 5 depth and
The thickness of support ring 1 is identical.
As shown in FIG. 1 to 3, seal groove 6, the bottom of seal groove 6 are provided at the center of two support annular grooves 5 of piston 4
Portion is equipped with sealing ring 3, and the outer wall for being close to sealing ring 3 is set with seal ring assembly 2；The width of seal groove 6 and the width of sealing ring 3
Of same size with seal ring assembly 2, the depth of seal groove 6 is the sum of thickness and thickness of seal ring assembly 2 of sealing ring 3.
As shown in figure 4, seal ring assembly 2 is the complete circular ring shape being made of sealing ring 7 and rubber pad 8, rubber pad 8
Arc length is 0.005~0.008 times of the complete annular；7 section of sealing ring is rectangle, the section of rubber pad 8 and sealing ring 7
Section it is identical.
As shown in figure 5, the one end for the sealing ring 7 being connected with rubber pad 8 is concave curved surface, the other end is convex surface, close
The concave curved surface of seal 7 and the intersection of convex surface and the outer wall of sealing ring 7 are arc-shaped, the arc curvature at 7 both ends of sealing ring
Radius is 0.5~0.55 times of 7 width of sealing ring；It is that corresponding convex is bent with the one end for the rubber pad 8 that sealing ring 7 is connected
Face, the other end are corresponding concave curved surface, and the concave curved surface of rubber pad 8 and the intersection of convex surface and the outer wall of rubber pad 8 are equal
Arc-shaped, the arc curvature radius at 8 both ends of rubber pad is 0.5~0.55 times of 8 width of rubber pad.
As shown in Figure 5 and Figure 6, it is equably provided with big-diameter blind hole in the outer wall of sealing ring 7, big-diameter blind hole is located in sealing ring 7
On heart line, the spacing of big-diameter blind hole is 3.5~4 times of 7 width of sealing ring；As shown in figure 5 and figure 7, pass through the big-diameter blind hole hole heart and with
7 center line of sealing ring is in positive 45 ° and in having 2 small blind holes on minus 45 ° of directions, each small blind hole and adjacent small blind hole
Between distance be 0.6~0.65 times of 7 width of sealing ring.
As shown in figure 8, sealing ring 3 is annulus breakaway-element；As shown in figure 9, one end of gap is concave curved surface, the other end
For convex surface, the intersection of the outer wall of the concave curved surface and convex surface and sealing ring 3 of sealing ring 3 is arc, and 3 liang of sealing ring
The arc curvature radius at end is 0.5~0.55 times of 3 width of sealing ring；As shown in Figure 10, two sides of sealing ring 3 are pair
The annular concave curved surface of title；The cross section of annular concave curved surface is arc-shaped, and the arc curvature radius of 3 two sides of sealing ring is sealing ring
0.5~0.55 times of 3 thickness.
0.5~0.55 times with a thickness of 6 depth of seal groove of the sealing ring 7, the material of the sealing ring 7 are aluminium bronze
Alloy material.
0.4~0.45 times with a thickness of 6 depth of seal groove of the sealing ring 3；The material of sealing ring 3 is fluorubber.
The material of the rubber pad 8 is fluorubber.
The diameter of the big-diameter blind hole is 0.15~0.18 times of 7 width of sealing ring, and the depth of big-diameter blind hole is 7 thickness of sealing ring
0.16~0.17 times.
The diameter of the small blind hole is 0.1~0.15 times of 7 width of sealing ring, and the depth of small blind hole is 7 thickness of sealing ring
0.1~0.15 times.
Embodiment 2
A kind of piston assembly for hydraulic cylinder.The present embodiment is in addition to following technical parameters, remaining is with embodiment 1:
The arc length of rubber pad 8 is 0.007~0.01 times of the complete annular；
Each small blind hole between adjacent small blind hole at a distance from be 0.65~0.7 times of 7 width of sealing ring；
0.55~0.6 times with a thickness of 6 depth of seal groove of the sealing ring 7；
0.45~0.5 times with a thickness of 6 depth of seal groove of the sealing ring 3；
The diameter of the big-diameter blind hole is 0.17~0.2 times of 7 width of sealing ring, and the depth of big-diameter blind hole is 7 thickness of sealing ring
0.17~0.18 times.
Compared to the prior art present embodiment has the advantage that
(1) present embodiment machined multiple groups blind hole in 7 outer wall of sealing ring, every group of blind hole be by four small blind holes and
One big-diameter blind hole forms, and has hydraulic oil in every group of blind hole, and when piston 4 moves, the hydraulic oil in blind hole is carried over, automatically
Oil film is formed in piston and inner wall of cylinder gap, reduces frictional force, lubrication and sealing performance are more preferable.
(2) present embodiment is machined with concave curved surface in the two sides of sealing ring 3, under high pressure oil effect, lip
Side is opened outward, and hydraulic fluid pressure is higher, and lip is more opened, so that hydraulic cylinder can also enhance leakproofness when bearing high pressure
Energy.
(3) present embodiment sealing ring 7 incision position, be equipped with one piece of rubber pad 8, can not only prevent high pressure oil from
The disconnected opening leaks of circle, and it is easy to disassemble.
(4) material of the sealing ring 7 of present embodiment is the aluminium bronze with certain flexible deformation, friction system
Number is small, can accelerate the response frequency of hydraulic cylinder, when there is small abrasion on its surface, since sealing ring 7 is to disconnect, so can be certainly
It by expanding outward, is compensated with this by the gap of small abrasion, improves sealing ring working life, and between adjust automatically sealing
Gap prevents from leaking.
Therefore, present embodiment is with frictional force is small, high frequency sound, can bear high pressure, good seal performance, working life
Long, energy adjust automatically seal clearance and feature convenient for disassembly and assembly, the hydraulic cylinder suitable for high pressure low friction.
Claims (6)
1. a kind of piston assembly for hydraulic cylinder, it is characterised in that the piston assembly is by support ring (1), sealing ring group
Part (2), sealing ring (3) and piston (4) composition；
Support annular groove (5), difference in two support annular grooves (5) are symmetrically provided at two sides on the cylindrical surface of piston (4)
Equipped with support ring (1)；Support of same size, the depth and bearing of support annular groove (5) of the width of annular groove (5) with support ring (1)
The thickness of ring (1) is identical；
It is provided with seal groove (6) at the center of two supports annular groove (5) of piston (4), the bottom of seal groove (6) is equipped with sealing ring
(3), the outer wall for being close to sealing ring (3) is set with seal ring assembly (2)；The width of seal groove (6) and the width of sealing ring (3) and
Seal ring assembly (2) it is of same size, the depth of seal groove (6) is the thickness of sealing ring (3) and the thickness of seal ring assembly (2)
The sum of；
Seal ring assembly (2) is the complete circular ring shape being made of sealing ring (7) and rubber pad (8), and the arc length of rubber pad (8) is
0.005~0.01 times of the complete annular；Sealing ring (7) section is rectangle, the section and sealing ring (7) of rubber pad (8)
Section it is identical；
The one end for the sealing ring (7) being connected with rubber pad (8) is concave curved surface, and the other end is convex surface, sealing ring (7) it is recessed
The intersection of shape curved surface and convex surface and the outer wall of sealing ring (7) is arc-shaped, and the arc curvature radius at sealing ring (7) both ends is equal
It is 0.5~0.55 times of sealing ring (7) width；One end with the rubber pad (8) of sealing ring (7) linking is that corresponding convex is bent
Face, the other end are corresponding concave curved surface, the friendship of the outer wall of the concave curved surface and convex surface and rubber pad (8) of rubber pad (8)
Line is arc-shaped, and the arc curvature radius at rubber pad (8) both ends is 0.5~0.55 times of rubber pad (8) width；
It is equably provided with big-diameter blind hole in the outer wall of sealing ring (7), big-diameter blind hole is located on the center line of sealing ring (7), big-diameter blind hole
Spacing is 3.5~4 times of sealing ring (7) width；Across the big-diameter blind hole hole heart and with sealing ring (7) center line in positive 45 ° and in negative
Have 2 small blind holes on 45 ° of directions, each small blind hole between adjacent small blind hole at a distance from be sealing ring (7) width
0.6~0.7 times；
Sealing ring (3) is annulus breakaway-element, and one end of gap is concave curved surface, and the other end is convex surface, sealing ring (3)
The intersection of concave curved surface and convex surface and the outer wall of sealing ring (3) is arc, the arc curvature radius at sealing ring (3) both ends
It is 0.5~0.55 times of sealing ring (3) width；Two sides of sealing ring (3) are symmetrical annular concave curved surface；It is cyclic annular recessed
The cross section of shape curved surface is arc-shaped, and the arc curvature radius of sealing ring (3) two sides is 0.5~0.55 times of sealing ring (3) thickness.
2. the piston assembly according to claim 1 for hydraulic cylinder, it is characterised in that sealing ring (7) with a thickness of close
0.5~0.6 times of sealing groove (6) depth, the material of the sealing ring (7) are aluminum-bronze alloy material.
3. the piston assembly according to claim 1 for hydraulic cylinder, it is characterised in that the thickness of the sealing ring (3)
It is 0.4~0.5 times of seal groove (6) depth；The material of sealing ring (3) is fluorubber.
4. the piston assembly according to claim 1 for hydraulic cylinder, it is characterised in that the material of the rubber pad (8)
For fluorubber.
5. the piston assembly according to claim 1 for hydraulic cylinder, it is characterised in that the diameter of the big-diameter blind hole is
0.15~0.2 times of sealing ring (7) width, the depth of big-diameter blind hole are 0.16~0.18 times of sealing ring (7) thickness.
6. the piston assembly according to claim 1 for hydraulic cylinder, it is characterised in that the diameter of the small blind hole is
0.1~0.15 times of sealing ring (7) width, the depth of small blind hole are 0.1~0.15 times of sealing ring (7) thickness.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822020809.7U CN209146036U (en) | 2018-12-04 | 2018-12-04 | A kind of piston assembly for hydraulic cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822020809.7U CN209146036U (en) | 2018-12-04 | 2018-12-04 | A kind of piston assembly for hydraulic cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209146036U true CN209146036U (en) | 2019-07-23 |
Family
ID=67288838
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822020809.7U Active CN209146036U (en) | 2018-12-04 | 2018-12-04 | A kind of piston assembly for hydraulic cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209146036U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109296592A (en) * | 2018-12-04 | 2019-02-01 | 武汉科技大学 | A kind of piston assembly for high pressure low friction hydraulic cylinder |
-
2018
- 2018-12-04 CN CN201822020809.7U patent/CN209146036U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109296592A (en) * | 2018-12-04 | 2019-02-01 | 武汉科技大学 | A kind of piston assembly for high pressure low friction hydraulic cylinder |
| CN109296592B (en) * | 2018-12-04 | 2023-12-22 | 武汉科技大学 | Piston assembly for high-pressure low-friction hydraulic cylinder |
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