CN109296592B - Piston assembly for high-pressure low-friction hydraulic cylinder - Google Patents
Piston assembly for high-pressure low-friction hydraulic cylinder Download PDFInfo
- Publication number
- CN109296592B CN109296592B CN201811471821.8A CN201811471821A CN109296592B CN 109296592 B CN109296592 B CN 109296592B CN 201811471821 A CN201811471821 A CN 201811471821A CN 109296592 B CN109296592 B CN 109296592B
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- sealing ring
- ring
- sealing
- curved surface
- width
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- 238000007789 sealing Methods 0.000 claims abstract description 194
- 229920001971 elastomer Polymers 0.000 claims abstract description 36
- 229920001973 fluoroelastomer Polymers 0.000 claims description 6
- 229910000906 Bronze Inorganic materials 0.000 claims description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 5
- 229910052782 aluminium Inorganic materials 0.000 claims description 5
- 239000000956 alloy Substances 0.000 claims description 3
- 238000012856 packing Methods 0.000 description 9
- 239000003921 oil Substances 0.000 description 7
- 239000010720 hydraulic oil Substances 0.000 description 6
- 230000001050 lubricating effect Effects 0.000 description 3
- 230000005489 elastic deformation Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000003754 machining 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
Abstract
The present invention relates to a piston assembly for a high pressure low friction hydraulic cylinder. The technical proposal is as follows: the piston assembly consists of a supporting ring (1), a sealing ring assembly (2), a sealing ring (3) and a piston (4). A sealing groove (6) is formed in the center of two supporting ring grooves (5) of the piston (4), a sealing ring (3) is arranged at the bottom of the sealing groove (6), and a sealing ring assembly (2) is sleeved on the outer wall of the sealing ring (3) in a close fit mode. The sealing ring assembly (2) is a complete circular ring formed by a sealing ring (7) and a rubber pad (8), the outer wall of the sealing ring (7) is uniformly provided with large blind holes, the large blind holes are positioned on the central line of the sealing ring (7), and 2 small blind holes respectively arranged in the directions of positive 45 degrees and negative 45 degrees passing through the hole center of the large blind holes and the central line of the sealing ring (7); the sealing ring (3) is a ring-shaped break type. The invention has the characteristics of small friction force, high frequency response, high bearing pressure, good sealing performance, long service life, automatic adjustment of sealing clearance and convenient disassembly and assembly, and is suitable for the hydraulic cylinders with high pressure and low friction.
Description
Technical Field
The invention belongs to the technical field of pistons of high-pressure low-friction hydraulic cylinders. And more particularly to a piston assembly for a high pressure, low friction hydraulic cylinder.
Background
In some high-pressure low-friction hydraulic cylinders, constant clearance sealing is adopted for reducing friction, but the sealing cannot completely prevent leakage due to clearance, when the pressure difference between two sides of a piston is large, the leakage amount is large, the volumetric efficiency of the hydraulic cylinder is reduced, the sealing performance is poor, in addition, the sealing has high requirements on the geometric shape and the surface machining precision of parts, and automatic compensation cannot be performed after abrasion.
The packing ring is sealed by the aid of the packing ring, the packing ring is manufactured strictly according to the size requirement of the hydraulic cylinder, the packing ring is small in elasticity and difficult to install, when the packing ring is worn, the worn packing gap is difficult to compensate, if the packing ring is too tight to fit, an oil film on the inner wall of the packing ring and the inner wall of the cylinder barrel is damaged, friction force is increased, and lubricating performance of the packing gap is difficult to guarantee due to a general structure.
Disclosure of Invention
The invention aims to overcome the technical defects, and aims to provide a piston assembly for a high-pressure low-friction hydraulic cylinder, which has the advantages of small friction force, high frequency response, high bearing pressure, good sealing performance, long service life, capability of automatically adjusting a sealing gap and convenience in disassembly and assembly.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows: the piston assembly of the high-pressure low-friction hydraulic cylinder consists of a supporting ring, a sealing ring assembly, a sealing ring and a piston.
Support ring grooves are symmetrically formed in the position, close to two side surfaces, of the cylindrical surface of the piston, and support rings are respectively arranged in the two support ring grooves; the width of the supporting ring groove is the same as that of the supporting ring, and the depth of the supporting ring groove is the same as that of the supporting ring.
A sealing groove is formed in the center of the two supporting ring grooves of the piston, a sealing ring is arranged at the bottom of the sealing groove, and a sealing ring assembly is sleeved on the outer wall of the sealing ring in a manner of clinging to the sealing ring; the width of the sealing groove is the same as the width of the sealing ring and the width of the sealing ring assembly, and the depth of the sealing groove is the sum of the thickness of the sealing ring and the thickness of the sealing ring assembly.
The sealing ring component is a complete circular ring formed by a sealing ring and a rubber pad, and the arc length of the rubber pad is 0.005-0.01 times of that of the complete circular ring; the cross section of the sealing ring is rectangular, and the cross section of the rubber pad is the same as the cross section of the sealing ring.
One end of the sealing ring connected with the rubber pad is a concave curved surface, the other end of the sealing ring is a convex curved surface, the intersection lines of the concave curved surface and the convex curved surface of the sealing ring and the outer wall of the sealing ring are arc-shaped, and the arc-shaped curvature radius of the two ends of the sealing ring is 0.5-0.55 times of the width of the sealing ring; one end of the rubber pad connected with the sealing ring is a corresponding convex curved surface, the other end of the rubber pad is a corresponding concave curved surface, the intersection lines of the concave curved surface and the convex curved surface of the rubber pad and the outer wall of the rubber pad are arc-shaped, and the arc-shaped curvature radius of the two ends of the rubber pad is 0.5-0.55 times of the width of the rubber pad.
The outer wall of the sealing ring is uniformly provided with large blind holes, the large blind holes are positioned on the central line of the sealing ring, and the distance between the large blind holes is 3.5-4 times of the width of the sealing ring; 2 small blind holes are respectively formed in the directions of positive 45 degrees and negative 45 degrees which pass through the hole center of the large blind hole and form the center line of the sealing ring, and the distance between each small blind hole and the adjacent small blind hole is 0.6-0.7 times of the width of the sealing ring.
The sealing ring is of a circular ring breaking type, one end of the breaking part is a concave curved surface, the other end of the breaking part is a convex curved surface, the intersecting lines of the concave curved surface and the convex curved surface of the sealing ring and the outer wall of the sealing ring are arc-shaped, and the arc-shaped curvature radiuses at the two ends of the sealing ring are 0.5-0.55 times of the width of the sealing ring; the two side surfaces of the sealing ring are symmetrical annular concave curved surfaces; the cross section of the annular concave curved surface is arc-shaped, and the arc-shaped curvature radius of the two sides of the sealing ring is 0.5-0.55 times of the thickness of the sealing ring.
The thickness of the sealing ring is 0.5-0.6 times of the depth of the sealing groove, and the sealing ring is made of aluminum bronze alloy material.
The thickness of the sealing ring is 0.4-0.5 times of the depth of the sealing groove; the sealing ring is made of fluororubber.
The rubber pad is made of fluororubber.
The diameter of the large blind hole is 0.15-0.2 times of the width of the sealing ring, and the depth of the large blind hole is 0.16-0.18 times of the thickness of the sealing ring.
The diameter of the small blind hole is 0.1-0.15 times of the width of the sealing ring, and the depth of the small blind hole is 0.1-0.15 times of the thickness of the sealing ring.
By adopting the technical scheme, compared with the prior art, the invention has the following advantages:
(1) According to the invention, the outer wall of the sealing ring is provided with a plurality of groups of blind holes, each group of blind holes consists of four small blind holes and one large blind hole, hydraulic oil is stored in each group of blind holes, when the piston moves, the hydraulic oil in the blind holes is carried out, and an oil film is automatically formed in a gap between the piston and the inner wall of the cylinder barrel, so that friction force is reduced, and lubricating and sealing performances are better.
(2) According to the invention, the concave curved surfaces are processed on the two side surfaces of the sealing ring, the lip edges of the sealing ring are outwards opened under the action of high-pressure oil, and the higher the pressure of the hydraulic oil is, the more the lip edges are opened, so that the sealing performance of the hydraulic cylinder can be enhanced when the hydraulic cylinder bears high pressure.
(3) According to the invention, the rubber gasket is arranged at the fracture of the sealing ring, so that high-pressure oil can be prevented from leaking from the circular fracture, and the sealing ring is convenient to assemble and disassemble.
(4) The sealing ring is made of aluminum bronze alloy with certain elastic deformation, has small friction coefficient, can accelerate the response frequency of the hydraulic cylinder, and can be freely expanded outwards due to the fact that the sealing ring is broken when the surface of the sealing ring is slightly worn, so that the gap of the slightly worn sealing ring is compensated, the service life of the sealing ring is prolonged, the sealing gap is automatically adjusted, and leakage is prevented.
Therefore, the invention has the characteristics of small friction force, high frequency response, high pressure bearing, good sealing performance, long service life, automatic adjustment of sealing clearance and convenient disassembly and assembly, and is suitable for the hydraulic cylinders with high pressure and low friction.
Drawings
FIG. 1 is a schematic diagram of a structure of the present invention;
fig. 2 is a schematic view of the piston 4 in fig. 1;
FIG. 3 is an enlarged schematic view of part of I in FIG. 1;
FIG. 4 is a schematic view of the seal ring assembly 2 of FIG. 1;
FIG. 5 is an expanded schematic view of the seal ring assembly 2 of FIG. 3;
FIG. 6 is a schematic view of the view A-A of FIG. 5;
FIG. 7 is a schematic view in the B-B direction of FIG. 5;
FIG. 8 is a schematic view of the shape of the seal ring 3 of FIG. 1;
FIG. 9 is an expanded schematic view of the seal ring 3 of FIG. 3;
fig. 10 is a schematic view in the C-C direction of fig. 9.
Detailed Description
The invention is further described below in connection with the drawings and the detailed description, without limiting the scope thereof.
Example 1
A piston assembly for a high pressure, low friction hydraulic cylinder. The piston assembly of the high-pressure low-friction hydraulic cylinder consists of a supporting ring 1, a sealing ring assembly 2, a sealing ring 3 and a piston 4.
As shown in fig. 1 and 2, support ring grooves 5 are symmetrically formed on the cylindrical surface of the piston 4 near two side surfaces, and the two support ring grooves 5 are respectively provided with a support ring 1; the width of the support ring groove 5 is the same as the width of the support ring 1, and the depth of the support ring groove 5 is the same as the thickness of the support ring 1.
As shown in fig. 1 to 3, a sealing groove 6 is formed in the center of two supporting ring grooves 5 of a piston 4, a sealing ring 3 is arranged at the bottom of the sealing groove 6, and a sealing ring assembly 2 is sleeved on the outer wall of the sealing ring 3; the width of the sealing groove 6 is the same as the width of the sealing ring 3 and the width of the sealing ring assembly 2, and the depth of the sealing groove 6 is the sum of the thickness of the sealing ring 3 and the thickness of the sealing ring assembly 2.
As shown in fig. 4, the sealing ring assembly 2 is a complete circular ring shape formed by a sealing ring 7 and a rubber gasket 8, and the arc length of the rubber gasket 8 is 0.005-0.008 times of the complete circular ring shape; the cross section of the sealing ring 7 is rectangular, and the cross section of the rubber pad 8 is the same as the cross section of the sealing ring 7.
As shown in fig. 5, one end of the sealing ring 7 connected with the rubber pad 8 is a concave curved surface, the other end is a convex curved surface, the intersection lines of the concave curved surface and the convex curved surface of the sealing ring 7 and the outer wall of the sealing ring 7 are arc-shaped, and the arc-shaped curvature radiuses of the two ends of the sealing ring 7 are 0.5-0.55 times of the width of the sealing ring 7; one end of the rubber pad 8 connected with the sealing ring 7 is a corresponding convex curved surface, the other end is a corresponding concave curved surface, the intersection line of the concave curved surface and the convex curved surface of the rubber pad 8 and the outer wall of the rubber pad 8 is arc-shaped, and the arc-shaped curvature radius of the two ends of the rubber pad 8 is 0.5-0.55 times of the width of the rubber pad 8.
As shown in fig. 5 and 6, the outer wall of the sealing ring 7 is uniformly provided with large blind holes, the large blind holes are positioned on the central line of the sealing ring 7, and the distance between the large blind holes is 3.5-4 times of the width of the sealing ring 7; as shown in fig. 5 and 7, 2 small blind holes are respectively formed in the directions of positive 45 degrees and negative 45 degrees which pass through the hole center of the large blind hole and form a center line of the sealing ring 7, and the distance between each small blind hole and the adjacent small blind hole is 0.6-0.65 times of the width of the sealing ring 7.
As shown in fig. 8, the seal ring 3 is a ring-broken type; as shown in fig. 9, one end of the break is a concave curved surface, the other end is a convex curved surface, the intersection lines of the concave curved surface and the convex curved surface of the sealing ring 3 and the outer wall of the sealing ring 3 are arc-shaped, and the arc-shaped curvature radius of the two ends of the sealing ring 3 is 0.5-0.55 times of the width of the sealing ring 3; as shown in fig. 10, both sides of the seal ring 3 are symmetrical annular concave curved surfaces; the cross section of the annular concave curved surface is arc-shaped, and the arc-shaped curvature radius of the two sides of the sealing ring 3 is 0.5-0.55 times of the thickness of the sealing ring 3.
The thickness of the sealing ring 7 is 0.5-0.55 times of the depth of the sealing groove 6, and the sealing ring 7 is made of aluminum bronze alloy material.
The thickness of the sealing ring 3 is 0.4-0.45 times of the depth of the sealing groove 6; the material of the seal ring 3 is fluororubber.
The rubber pad 8 is made of fluororubber.
The diameter of the large blind hole is 0.15-0.18 times of the width of the sealing ring 7, and the depth of the large blind hole is 0.16-0.17 times of the thickness of the sealing ring 7.
The diameter of the small blind hole is 0.1-0.15 times of the width of the sealing ring 7, and the depth of the small blind hole is 0.1-0.15 times of the thickness of the sealing ring 7.
Example 2
A piston assembly for a high pressure, low friction hydraulic cylinder. This example is the same as example 1 except for the following technical parameters:
the arc length of the rubber pad 8 is 0.007 to 0.01 times of that of the complete ring shape;
the distance between each small blind hole and the adjacent small blind hole is 0.65-0.7 times of the width of the sealing ring 7;
the thickness of the sealing ring 7 is 0.55-0.6 times of the depth of the sealing groove 6;
the thickness of the sealing ring 3 is 0.45-0.5 times of the depth of the sealing groove 6;
the diameter of the large blind hole is 0.17-0.2 times of the width of the sealing ring 7, and the depth of the large blind hole is 0.17-0.18 times of the thickness of the sealing ring 7.
Compared with the prior art, the specific embodiment has the following advantages:
(1) According to the embodiment, a plurality of groups of blind holes are processed on the outer wall of the sealing ring 7, each group of blind holes consists of four small blind holes and one large blind hole, hydraulic oil is stored in each group of blind holes, when the piston 4 moves, the hydraulic oil in the blind holes is carried out, an oil film is automatically formed in a gap between the piston and the inner wall of the cylinder barrel, friction force is reduced, and lubricating and sealing performances are better.
(2) In the specific embodiment, concave curved surfaces are machined on two side surfaces of the sealing ring 3, the lip edges of the sealing ring are outwards opened under the action of high-pressure oil, and the higher the pressure of the hydraulic oil is, the more the lip edges are opened, so that the sealing performance of the hydraulic cylinder can be enhanced when the hydraulic cylinder bears high pressure.
(3) In the specific embodiment, the rubber gasket 8 is arranged at the fracture of the sealing ring 7, so that high-pressure oil can be prevented from leaking from the circular fracture, and the disassembly and the assembly are convenient.
(4) The material of the sealing ring 7 in this embodiment is an aluminum bronze alloy with certain elastic deformation, the friction coefficient is small, the response frequency of the hydraulic cylinder can be accelerated, when the surface of the sealing ring is slightly worn, the sealing ring 7 can be freely expanded outwards because of being disconnected, so that the gap worn slightly can be compensated, the working life of the sealing ring is prolonged, the sealing gap is automatically adjusted, and leakage is prevented.
Therefore, the special embodiment has the characteristics of small friction force, high frequency response, high bearing pressure, good sealing performance, long service life, automatic adjustment of sealing clearance and convenient disassembly and assembly, and is suitable for the high-pressure low-friction hydraulic cylinder.
Claims (4)
1. A piston assembly for a high pressure low friction hydraulic cylinder, characterized in that the piston assembly consists of a support ring (1), a sealing ring assembly (2), a sealing ring (3) and a piston (4);
support ring grooves (5) are symmetrically formed in the position, close to two side surfaces, of the cylindrical surface of the piston (4), and the two support ring grooves (5) are respectively provided with a support ring (1); the width of the supporting ring groove (5) is the same as that of the supporting ring (1), and the depth of the supporting ring groove (5) is the same as that of the supporting ring (1);
a sealing groove (6) is formed in the center of the two supporting ring grooves (5) of the piston (4), a sealing ring (3) is arranged at the bottom of the sealing groove (6), and a sealing ring assembly (2) is sleeved on the outer wall of the sealing ring (3); the width of the sealing groove (6) is the same as the width of the sealing ring (3) and the width of the sealing ring assembly (2), and the depth of the sealing groove (6) is the sum of the thickness of the sealing ring (3) and the thickness of the sealing ring assembly (2);
the sealing ring assembly (2) is a complete circular ring formed by a sealing ring (7) and a rubber gasket (8), and the arc length of the rubber gasket (8) is 0.005-0.01 times of that of the complete circular ring; the section of the sealing ring (7) is rectangular, and the section of the rubber pad (8) is the same as the section of the sealing ring (7);
one end of a sealing ring (7) connected with the rubber pad (8) is a concave curved surface, the other end of the sealing ring is a convex curved surface, the intersection lines of the concave curved surface and the convex curved surface of the sealing ring (7) and the outer wall of the sealing ring (7) are arc-shaped, and the arc-shaped curvature radiuses at the two ends of the sealing ring (7) are 0.5-0.55 times of the width of the sealing ring (7); one end of a rubber pad (8) connected with the sealing ring (7) is a corresponding convex curved surface, the other end of the rubber pad is a corresponding concave curved surface, the intersection lines of the concave curved surface and the convex curved surface of the rubber pad (8) and the outer wall of the rubber pad (8) are arc-shaped, and the arc-shaped curvature radiuses at the two ends of the rubber pad (8) are 0.5-0.55 times of the width of the rubber pad (8);
the outer wall of the sealing ring (7) is uniformly provided with large blind holes, the large blind holes are positioned on the central line of the sealing ring (7), and the distance between the large blind holes is 3.5-4 times of the width of the sealing ring (7); 2 small blind holes are respectively formed in the directions of positive 45 degrees and negative 45 degrees which pass through the hole center of the large blind hole and form a center line of the sealing ring (7), and the distance between each small blind hole and the adjacent small blind hole is 0.6-0.7 times of the width of the sealing ring (7);
the sealing ring (3) is of a circular ring breaking type, one end of the breaking part is a concave curved surface, the other end of the breaking part is a convex curved surface, the intersecting lines of the concave curved surface and the convex curved surface of the sealing ring (3) and the outer wall of the sealing ring (3) are arc-shaped, and the arc-shaped curvature radiuses at the two ends of the sealing ring (3) are 0.5-0.55 times of the width of the sealing ring (3); two side surfaces of the sealing ring (3) are symmetrical annular concave curved surfaces; the cross section of the annular concave curved surface is arc-shaped, and the arc-shaped curvature radius of the two sides of the sealing ring (3) is 0.5-0.55 times of the thickness of the sealing ring (3);
the thickness of the sealing ring (7) is 0.5-0.6 times of the depth of the sealing groove (6), and the sealing ring (7) is made of aluminum bronze alloy material;
the thickness of the sealing ring (3) is 0.4-0.5 times of the depth of the sealing groove (6); the sealing ring (3) is made of fluororubber.
2. Piston assembly for a high pressure low friction hydraulic cylinder according to claim 1, characterized in that the rubber pad (8) is made of fluororubber.
3. The piston assembly for a high-pressure low-friction hydraulic cylinder according to claim 1, wherein the diameter of the large blind hole is 0.15-0.2 times the width of the sealing ring (7), and the depth of the large blind hole is 0.16-0.18 times the thickness of the sealing ring (7).
4. The piston assembly for a high-pressure low-friction hydraulic cylinder according to claim 1, characterized in that the diameter of the small blind hole is 0.1-0.15 times the width of the sealing ring (7), and the depth of the small blind hole is 0.1-0.15 times the thickness of the sealing ring (7).
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 CN109296592A (en) | 2019-02-01 |
| CN109296592B true 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 |
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| 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 |
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| Publication number | Publication date |
|---|---|
| CN109296592A (en) | 2019-02-01 |
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