CN109296592A - A kind of piston assembly for high pressure low friction hydraulic cylinder - Google Patents
A kind of piston assembly for high pressure low friction hydraulic cylinder Download PDFInfo
- Publication number
- CN109296592A CN109296592A CN201811471821.8A CN201811471821A CN109296592A CN 109296592 A CN109296592 A CN 109296592A CN 201811471821 A CN201811471821 A CN 201811471821A CN 109296592 A CN109296592 A CN 109296592A
- Authority
- CN
- China
- Prior art keywords
- sealing ring
- ring
- seal
- blind hole
- high pressure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000007789 sealing Methods 0.000 claims abstract description 139
- 239000000463 material Substances 0.000 claims description 12
- 229910000906 Bronze Inorganic materials 0.000 claims description 2
- 239000000956 alloy Substances 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 125000004122 cyclic group Chemical group 0.000 claims 1
- 230000000712 assembly Effects 0.000 abstract 1
- 238000000429 assembly Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 9
- 239000003921 oil Substances 0.000 description 7
- 238000005299 abrasion Methods 0.000 description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 239000010720 hydraulic oil Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
- F15B15/1447—Pistons; Piston to piston rod assemblies
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
- F15B15/1447—Pistons; Piston to piston rod assemblies
- F15B15/1452—Piston sealings
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
- Y02T10/86—Optimisation of rolling resistance, e.g. weight reduction
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Sealing Devices (AREA)
Abstract
The present invention relates to a kind of piston assemblies for high pressure low friction 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 present invention 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 invention belongs to the piston technical fields of high pressure low friction hydraulic cylinder.More particularly to it is a kind of for high pressure low friction liquid
The piston assembly of cylinder pressure.
Background technique
At present in some high pressure low friction hydraulic cylinders, rub to reduce using permanent clearance seal, but this sealing
It since there are gaps, thus cannot prevent completely leak, when piston pressure at both sides difference is larger, cause leakage rate big, so that liquid
The volumetric efficiency of cylinder pressure reduces, therefore sealing performance is poor, and furthermore this sealing processes essence to the geometry of part and surface
Degree has higher requirement, and can not be compensated automatically after wearing.
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 present invention is directed to overcome above-mentioned technological deficiency, it is therefore an objective to provide a kind of small frictional force, high frequency sound, can bear high pressure,
Good seal performance, long working life, energy adjust automatically seal clearance and the work for high pressure low friction hydraulic cylinder convenient for disassembly and assembly
Fill in sub-assembly.
To achieve the goals above, the technical solution adopted by the present invention is that: the piston assembly of high pressure low friction hydraulic cylinder
It is made of support ring, seal ring assembly, sealing ring and piston.
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 present invention has the following advantages:
(1) present invention machined multiple groups blind hole in sealing ring outer wall, and every group of blind hole is big blind by four small blind holes and one
Hole composition, has hydraulic oil in every group of blind hole, and as the piston moves, the hydraulic oil in blind hole is carried over, automatically piston with
Inner wall of cylinder forms oil film in gap, reduces frictional force, and lubrication and sealing performance are more preferable.
(2) present invention is machined with concave curved surface in the two sides of sealing ring, and under high pressure oil effect, lip is opened 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) present invention is equipped with one piece of rubber pad in the incision position of sealing ring, can not only prevent high pressure oil from disconnecting mouth from circle
Leakage, and it is easy to disassemble.
(4) material of sealing ring of the invention is the aluminium bronze with certain flexible deformation, and coefficient of friction is small, can be added
The response frequency of fast hydraulic cylinder, when there is small abrasion on its surface, since sealing ring is to disconnect, so freely past can extend out
, it is compensated with this by the gap of small abrasion, improves sealing ring working life, and adjust automatically seal clearance, anti-stopping leak
Leakage.
Therefore, the present invention has small frictional force, high frequency sound, can bear high pressure, good seal performance, long working life, energy certainly
Dynamic adjustment 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 invention；
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
Present invention will be further described below with reference to the accompanying drawings and specific embodiments, not to the limit of its protection scope
System.
Embodiment 1
A kind of piston assembly for high pressure low friction hydraulic cylinder.The piston assembly of high pressure low friction hydraulic cylinder is by propping up
Carrier ring 1, seal ring assembly 2, sealing 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 high pressure low friction hydraulic cylinder.For the present embodiment in addition to following technical parameters, remaining is same
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 high pressure low friction hydraulic cylinder, it is characterised in that the piston assembly is by support ring
(1), seal ring assembly (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 high pressure low friction hydraulic cylinder, it is characterised in that sealing ring (7)
0.5~0.6 times with a thickness of seal groove (6) depth, the material of the sealing ring (7) is aluminum-bronze alloy material.
3. the piston assembly according to claim 1 for high pressure low friction hydraulic cylinder, it is characterised in that the sealing
0.4~0.5 times with a thickness of seal groove (6) depth of ring (3)；The material of sealing ring (3) is fluorubber.
4. the piston assembly according to claim 1 for high pressure low friction hydraulic cylinder, it is characterised in that the rubber
The material for padding (8) is fluorubber.
5. the piston assembly according to claim 1 for high pressure low friction hydraulic cylinder, it is characterised in that described big blind
The diameter in hole is 0.15~0.2 times of sealing ring (7) width, and the depth of big-diameter blind hole is the 0.16~0.18 of sealing ring (7) thickness
Times.
6. the piston assembly according to claim 1 for high pressure low friction hydraulic cylinder, it is characterised in that described small blind
The diameter in hole is 0.1~0.15 times of sealing ring (7) width, and the depth of small blind hole is the 0.1~0.15 of sealing ring (7) thickness
Times.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811471821.8A CN109296592B (en) | 2018-12-04 | 2018-12-04 | Piston assembly for high-pressure low-friction hydraulic cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811471821.8A CN109296592B (en) | 2018-12-04 | 2018-12-04 | Piston assembly for high-pressure low-friction hydraulic cylinder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109296592A true CN109296592A (en) | 2019-02-01 |
| CN109296592B CN109296592B (en) | 2023-12-22 |
Family
ID=65141430
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811471821.8A Active CN109296592B (en) | 2018-12-04 | 2018-12-04 | Piston assembly for high-pressure low-friction hydraulic cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109296592B (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1225152A (en) * | 1996-12-05 | 1999-08-04 | 曼B与W狄赛尔公司 | A cylinder element, such as a cylinder liner, A piston, a piston skirt or a piston ring, in an internal combustion engine of the diesel type,and a piston ring for such an engine |
| JP2001146908A (en) * | 1999-11-22 | 2001-05-29 | Kayaba Ind Co Ltd | Cushioning device of hydraulic cylinder |
| WO2008072738A1 (en) * | 2006-12-14 | 2008-06-19 | Nok Corporation | Sealing device and method of manufacturing the device |
| CN201884362U (en) * | 2010-08-17 | 2011-06-29 | 北京福坛嘉业科技有限公司 | No-leakage and constant performance wear compensation type hydraulic cylinder |
| CN102305289A (en) * | 2011-08-04 | 2012-01-04 | 武汉科技大学 | Gap seal hydraulic cylinder based on deformable piston ring |
| CN202348815U (en) * | 2011-11-15 | 2012-07-25 | 浙江师范大学 | Hydraulic cylinder of hydraulic hinge |
| CN103867526A (en) * | 2014-04-11 | 2014-06-18 | 武汉科技大学 | Low-friction hybrid support guide sleeve hydraulic cylinder |
| CN208024654U (en) * | 2018-04-04 | 2018-10-30 | 四川川钨硬质合金有限公司 | A kind of piston packing ring |
| CN209146036U (en) * | 2018-12-04 | 2019-07-23 | 武汉科技大学 | A kind of piston assembly for hydraulic cylinder |
-
2018
- 2018-12-04 CN CN201811471821.8A patent/CN109296592B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1225152A (en) * | 1996-12-05 | 1999-08-04 | 曼B与W狄赛尔公司 | A cylinder element, such as a cylinder liner, A piston, a piston skirt or a piston ring, in an internal combustion engine of the diesel type,and a piston ring for such an engine |
| JP2001146908A (en) * | 1999-11-22 | 2001-05-29 | Kayaba Ind Co Ltd | Cushioning device of hydraulic cylinder |
| WO2008072738A1 (en) * | 2006-12-14 | 2008-06-19 | Nok Corporation | Sealing device and method of manufacturing the device |
| CN201884362U (en) * | 2010-08-17 | 2011-06-29 | 北京福坛嘉业科技有限公司 | No-leakage and constant performance wear compensation type hydraulic cylinder |
| CN102305289A (en) * | 2011-08-04 | 2012-01-04 | 武汉科技大学 | Gap seal hydraulic cylinder based on deformable piston ring |
| CN202348815U (en) * | 2011-11-15 | 2012-07-25 | 浙江师范大学 | Hydraulic cylinder of hydraulic hinge |
| CN103867526A (en) * | 2014-04-11 | 2014-06-18 | 武汉科技大学 | Low-friction hybrid support guide sleeve hydraulic cylinder |
| CN208024654U (en) * | 2018-04-04 | 2018-10-30 | 四川川钨硬质合金有限公司 | A kind of piston packing ring |
| CN209146036U (en) * | 2018-12-04 | 2019-07-23 | 武汉科技大学 | A kind of piston assembly for hydraulic cylinder |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109296592B (en) | 2023-12-22 |
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