CN105041765A - Hydraulic cylinder with stepped lip edge guide sleeve - Google Patents
Hydraulic cylinder with stepped lip edge guide sleeve Download PDFInfo
- Publication number
- CN105041765A CN105041765A CN201510395979.1A CN201510395979A CN105041765A CN 105041765 A CN105041765 A CN 105041765A CN 201510395979 A CN201510395979 A CN 201510395979A CN 105041765 A CN105041765 A CN 105041765A
- Authority
- CN
- China
- Prior art keywords
- guide sleeve
- ladder
- cylinder body
- stepped shaft
- lip limit
- 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.)
- Pending
Links
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
-
- 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
- F15B15/1471—Guiding means other than in the end cap
-
- 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
- F15B15/20—Other details, e.g. assembly with regulating devices
Abstract
The invention relates to a hydraulic cylinder with a stepped lip edge guide sleeve, and belongs to the technical field of low-friction hydraulic cylinders. The hydraulic cylinder comprises a left end cover, the guide sleeve, a piston rod, a cylinder body, a piston and a right end cover; an annular boss is arranged on the inner wall of the cylinder body, and the left end cover, the cylinder body and the annular boss concentrically fix the guide sleeve in the cylinder body; one end, stretching into the cylinder body, of the piston rod is concentrically and fixedly connected with the piston, and the other end of the piston rod penetrates through a center hole of the guide sleeve and a center hole of the left end cover to stretch out of the cylinder body; a first oil port and a second oil port are formed in one side of the cylinder body; a first seal groove for installing a first O-type seal ring is formed in the contact face of the guide sleeve and the left end cover, a second seal groove for installing a second O-type seal ring is formed in the contact face of the guide sleeve and the cylinder body, and a stepped lip edge tightly attached to the piston rod is arranged at one side, close to the piston, of the guide sleeve. The hydraulic cylinder has the advantages of long service life, low friction, high frequency response, low abrasion loss and leakage, high reliability and dynamic pressure lubricating supporting.
Description
Technical field
The present invention relates to low friction hydraulic cylinder technical field, be specifically related to a kind of oil hydraulic cylinder with stepped shaft lip limit guide sleeve.
Background technique
Oil hydraulic cylinder is one of critical piece of Hydraulic Power Transmission System, and it is that the pressure energy of fluid is converted to mechanical energy, realizes the energy conversion device of linear reciprocating motion or swing, is also apply maximum parts in hydraulic system.
Existing oil hydraulic cylinder contacts with the sealing between guide sleeve and mostly is seal ring contact seal, the sealing of this mode adds the resistance to motion between piston rod and guide sleeve, exacerbate the wearing and tearing between guide sleeve inwall and piston rod, make the dynamic characteristic of oil hydraulic cylinder be difficult to improve, working life reduces greatly.
Existing guide sleeve Gap Sealing Technology has several balancing slits on guide sleeve internal surface, and its Main Function makes Radial pressure distribution even, reduces hydraulic card clamping force, make the centering of piston rod and guide sleeve good simultaneously.Patent of invention " a kind of oil film supporting servo hydraulic cylinder " as application number 200910060877.9 discloses and has 3-7 road compensating groove in guide sleeve inner wall surface, to reduce wearing and tearing between piston and inner wall of cylinder and to reduce leakage rate, but still there is certain shortcoming in this mode, as wear extent under fast state is still comparatively large, during pressure increase, leakage rate also can increase.
And for example the utility model patent " a kind of active and static pressure clearance seal guide sleeve oil hydraulic cylinder " of application number 201420174484 discloses and be evenly provided with three active and static pressure oil grooves on the hole wall of guide sleeve, reach and reduce oil hydraulic cylinder friction and improve oil hydraulic cylinder frequency response, but " work " shaped oil groove involved by this mode is difficult to processing, simultaneously along with its leakage rate of increase also corresponding increase of pressure.
In sum, the guide sleeve in existing oil hydraulic cylinder exists that frictional force between guide sleeve and piston rod is large, wear extent large, and fluid leaks serious through guide sleeve, the defect that the overall frequency response of oil hydraulic cylinder is low and the hydraulic cylinder guide sleeve life-span is low.
Summary of the invention
The object of the invention is, in order to overcome the above-mentioned defect existed in prior art, to provide a kind of oil hydraulic cylinder with stepped shaft lip limit guide sleeve.
The present invention proposes a kind of oil hydraulic cylinder with stepped shaft lip limit guide sleeve, comprise left end cap, guide sleeve, piston rod, cylinder body, piston and right end cap; Described inboard wall of cylinder block is provided with annular boss, and guide sleeve is fixed in cylinder body by described left end cap, cylinder body and annular boss concentrically; One end that described piston rod stretches into cylinder body is fixedly connected with piston is concentricity, and the other end of piston rod stretches out cylinder body through the center of guide sleeve and the center of left end cap successively; Described cylinder body side has rod chamber hydraulic fluid port and rodless cavity hydraulic fluid port; The surface of contact of described guide sleeve and left end cap is provided with the first seal groove, and described first seal groove internal fixtion is provided with an O RunddichtringO; The surface of contact of described guide sleeve and cylinder body is provided with the second seal groove, and described second seal groove internal fixtion is provided with the 2nd O RunddichtringO; Described guide sleeve is provided with the stepped shaft lip limit being close to piston rod near the side of piston, the thickness of the ladder on described stepped shaft lip limit increases successively along with away from guide sleeve.
In technique scheme, described stepped shaft lip limit is three sections of ladder distributions, and rightmost side ladder is the first ladder, and secondary right side ladder is the second ladder, and leftmost side ladder is the 3rd ladder, described first ladder outer surface and guide sleeve internal face distance d
1=2-3mm, the second ladder outer surface and guide sleeve internal face distance d
2=(0.7-0.8) d
1, the 3rd ladder outer surface and guide sleeve internal face distance d
3=(0.4-0.6) d
1; 3rd ladder left side and guide sleeve right side distance b
1=9-12mm, the second ladder left side and guide sleeve right side distance b
2=(0.6-0.7) b
1, the first ladder left side and guide sleeve right side distance b
3=(0.3-0.35) b
1; The 3rd ladder left ladder place fillet radius R on stepped shaft lip limit
1=0.4-0.55mm, right ladder place fillet radius R
2=(0.5-0.6) R
1, the second ladder right ladder place fillet radius R
3=R
2.
In technique scheme, the internal face of described guide sleeve and plunger rod contacts has rhombus texture and rectangle balancing slit.
In technique scheme, the quantity of described rectangle balancing slit is 3 roads, 5 roads, 7 roads or 9 roads.
In technique scheme, described rhombus texture and rectangle balancing slit are alternately uniformly distributed in the axial direction.
In technique scheme, when described rhombus Texture axial direction and circumferencial direction are uniformly distributed, be arranged on the spacing L=0.8-1mm of rhombus Texture axis between twice rectangle balancing slit, width B=(0.5-0.6) L of rhombus Texture axial direction, the along the circumferential direction radial depth H=0.2-0.3L of rhombus texture; Along the circumferential direction adjacent two rhombus texture angle α=8-12 degree, along the circumferential direction angle β=(0.6-0.8) α of rhombus texture 3.
In technique scheme, described guide sleeve material is tin bronze.
The oil hydraulic cylinder with stepped shaft lip limit guide sleeve in the present invention is close at the right-hand member of guide sleeve the stepped shaft lip limit that piston rod place is provided with the distribution in multistage stepped shaft, wherein the ladder section thickness of the rightmost side is maximum, and each step-thickness reduces successively along left side in the axial direction; During hydraulic cylinder works, along with the change of hydraulic fluid pressure, the distortion on stepped shaft lip limit increases along with the increase of pressure, the distortion of outermost ladder is maximum, because the thickness of outermost ladder is also maximum, the amount of deformation along with pressure increase causes can be compensated, make the amount of deformation homogenization on whole stepped shaft lip limit, on stepped shaft lip limit, be provided with fillet simultaneously, stepped shaft lip limit stress can be avoided to concentrate and cause the fracture of lip limit and piston rod to clamp the generation of phenomenon; Simultaneously under the effect of hydraulic fluid pressure, stepped shaft lip limit can be expanded outward, reduce the gap between guide sleeve and piston rod, along with the pressure of hydraulic oil changes, the amount of expansion on stepped shaft lip limit also changes thereupon, and its gap value also changes thereupon, the gap between the adaptive adjustment guide sleeve of energy and piston rod, effective minimizing flow leaks, and oil hydraulic cylinder volumetric efficiency is improved.
The present invention is processed with rhombus texture at guide sleeve inwall simultaneously, the pit unit of each rhombus texture is in the process of reciprocating motion of the pistons, be equivalent to a fine motion pressure lubricating bearing, hydrodynamic lubrication oil film can be formed between piston rod and guide sleeve, reduce friction, be conducive to the frequency response improving oil hydraulic cylinder; Be processed with balancing slit at guide sleeve inwall simultaneously, make to form clearance seal between piston rod and guide sleeve, avoid the rigid contact between piston rod and guide sleeve, avoid fretting wear, and balancing slit can produce pressure balance, avoid the generation that piston rod is stuck.Balancing slit and the rhombus texture of guide sleeve inwall processing in the present invention are alternately uniformly distributed, several rhombus texture is provided with between adjacent twice rectangle balancing slit, both mating reactions, when making work, fluid is evenly distributed in the pit unit of balancing slit and rhombus texture, can start at oil hydraulic cylinder and in working procedure, provide fluid to lubricate, avoid the formation of three body frictions, improve the life-span of oil hydraulic cylinder greatly, decrease the leakage rate of fluid; Adopt tin bronze to make guide sleeve simultaneously, while guarantee higher-strength, there is corrosion resistance, wear resistance, can increase the service life.
In sum, it is long that the present invention has the life-span, and rub low, that frequency response is high, wear extent is low, it is low to leak, reliability is high and hydrodynamic lubrication supports advantage.
Accompanying drawing explanation
Fig. 1 is the structural representation of oil hydraulic cylinder in the present invention;
Fig. 2 is the cross-sectional view of guide sleeve in Fig. 1;
Fig. 3 is the A-A place cross-sectional view of the rhombus texture in Fig. 2;
Fig. 4 is the close-up schematic view of the rhombus Texture axial direction at I place in Fig. 2;
Fig. 5 is the close-up schematic view on II stepped shaft lip limit, place in Fig. 2.
In figure: 1-left end cap; 2-first seal groove; 3-guide sleeve;
4-second seal groove; 5-rod chamber hydraulic fluid port; 6-piston rod;
7-cylinder body; 8-piston; 9-rodless cavity hydraulic fluid port;
10-right end cap; 11-rhombus texture; 12 rectangle balancing slits;
13-annular boss; 14-stepped shaft lip limit.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
Embodiment 1
There is an oil hydraulic cylinder for stepped shaft lip limit guide sleeve, as shown in Figure 1, Figure 2, shown in Fig. 3, Fig. 4, Fig. 5, comprise left end cap 1, guide sleeve 3, piston rod 6, cylinder body 7, piston 8 and right end cap 10; Cylinder body 7 inwall is provided with annular boss 13, and guide sleeve 3 is fixed in cylinder body 7 by left end cap 1, cylinder body 7 and annular boss 13 concentrically; One end that piston rod 6 stretches into cylinder body 7 is fixedly connected with piston 8 is concentricity, and the other end of piston rod 6 stretches out cylinder body 7 through the center of guide sleeve 3 and the center of left end cap 1 successively; Cylinder body 7 side has rod chamber hydraulic fluid port 5 and rodless cavity hydraulic fluid port 9; Guide sleeve 3 is provided with the first seal groove 2, first seal groove 2 internal fixtion with the surface of contact of left end cap 1 and is provided with an O RunddichtringO; Guide sleeve 3 is provided with the second seal groove 4, second seal groove 4 internal fixtion with the surface of contact of cylinder body 7 and is provided with the 2nd O RunddichtringO; Guide sleeve 3 is provided with the stepped shaft lip limit 14 being close to piston rod 6 near the side of piston 8, the thickness of the ladder on stepped shaft lip limit 14 increases successively along with away from guide sleeve 3; Stepped shaft lip limit 14 is in three sections of ladder distributions, rightmost side ladder farthest away from guide sleeve 3 is the first ladder, the secondary time right side ladder away from guide sleeve 3 is the second ladder, and the leftmost side ladder near guide sleeve 3 is the 3rd ladder, the first ladder outer surface and guide sleeve 3 internal face distance d
1=2mm, the second ladder outer surface and guide sleeve 3 internal face distance d
2=1.6mm, the 3rd ladder outer surface and guide sleeve 3 internal face distance d
3=1.2mm; 3rd ladder left side and guide sleeve 3 right side distance b
1=9mm, the second ladder left side and guide sleeve 3 right side distance b
2=5.4mm, the first ladder left side and guide sleeve 3 right side distance b
3=2.7mm; The 3rd ladder left ladder place fillet radius R on stepped shaft lip limit 14
1=0.4mm, right ladder place fillet radius R
2=0.2mm, the second ladder right ladder place fillet radius R
3=0.2mm; The internal face that guide sleeve 3 contacts with piston rod 6 has rhombus texture 11 and 5 road rectangle balancing slit 12; Rhombus texture 11 and rectangle balancing slit 12 are alternately uniformly distributed in the axial direction; Two rhombus texture 11 are provided with in the axial direction between equally distributed every twice rectangle balancing slit 12; Be arranged on two rhombus texture 3 spacing L=0.8mm vertically between twice rectangle balancing slit 12, rhombus texture 11 width B=0.4mm in axial direction, along the circumferential direction the radial depth H=0.16mm of rhombus texture 11; Along the circumferential direction adjacent two rhombus texture 11 angle α=8 degree, along the circumferential direction angle β=4.8 degree of rhombus texture 11, guide sleeve 3 material is tin bronze.
Embodiment 2
There is an oil hydraulic cylinder for stepped shaft lip limit guide sleeve, as shown in Figure 1, Figure 2, shown in Fig. 3, Fig. 4, Fig. 5, comprise left end cap 1, guide sleeve 3, piston rod 6, cylinder body 7, piston 8 and right end cap 10; Cylinder body 7 inwall is provided with annular boss 13, and guide sleeve 3 is fixed in cylinder body 7 by left end cap 1, cylinder body 7 and annular boss 13 concentrically; One end that piston rod 6 stretches into cylinder body 7 is fixedly connected with piston 8 is concentricity, and the other end of piston rod 6 stretches out cylinder body 7 through the center of guide sleeve 3 and the center of left end cap 1 successively; Cylinder body 7 side has rod chamber hydraulic fluid port 5 and rodless cavity hydraulic fluid port 9; Guide sleeve 3 is provided with the first seal groove 2, first seal groove 2 internal fixtion with the surface of contact of left end cap 1 and is provided with an O RunddichtringO; Guide sleeve 3 is provided with the second seal groove 4, second seal groove 4 internal fixtion with the surface of contact of cylinder body 7 and is provided with the 2nd O RunddichtringO; Guide sleeve 3 is provided with the stepped shaft lip limit 14 being close to piston rod 6 near the side of piston 8, the thickness of the ladder on stepped shaft lip limit 14 increases successively along with away from guide sleeve 3; Stepped shaft lip limit 14 is in three sections of ladder distributions, rightmost side ladder farthest away from guide sleeve 3 is the first ladder, the secondary time right side ladder away from guide sleeve 3 is the second ladder, and the leftmost side ladder near guide sleeve 3 is the 3rd ladder, the first ladder outer surface and guide sleeve 3 internal face distance d
1=3mm, the second ladder outer surface and guide sleeve 3 internal face distance d
2=2.1mm, the 3rd ladder outer surface and guide sleeve 3 internal face distance d
3=1.2mm; 3rd ladder and guide sleeve 3 right side distance b
1=12mm, the second ladder and guide sleeve 3 right side distance b
2=7.2mm, the first ladder and guide sleeve 3 right side distance b
3=3.6mm; The 3rd ladder left ladder place fillet radius R on stepped shaft lip limit 14
1=0.55mm, right ladder place fillet radius R
2=0.33mm, the second ladder right ladder place fillet radius R
3=0.33mm.The internal face that guide sleeve 3 contacts with piston rod 6 has rhombus texture 11 and 5 road rectangle balancing slit 12; Rhombus texture 11 and rectangle balancing slit 12 are alternately uniformly distributed in the axial direction; Two rhombus texture 11 are provided with in the axial direction between equally distributed every twice rectangle balancing slit 12; Be arranged on two rhombus texture 3 spacing L=1mm vertically between twice rectangle balancing slit 12, rhombus texture 11 width B=0.6mm in axial direction, along the circumferential direction the radial depth H=0.3mm of rhombus texture 11; Along the circumferential direction adjacent two rhombus texture 11 angle α=10 degree, along the circumferential direction angle β=8 degree of rhombus texture 11, guide sleeve 3 material is tin bronze.
The content be not described in detail in this specification belongs to the known prior art of professional and technical personnel in the field.
Claims (7)
1. one kind has the oil hydraulic cylinder of stepped shaft lip limit guide sleeve, it is characterized in that: comprise left end cap (1), guide sleeve (3), piston rod (6), cylinder body (7), piston (8) and right end cap (10); Described cylinder body (7) inwall is provided with annular boss (13), and guide sleeve (3) is fixed in cylinder body (7) by described left end cap (1), cylinder body (7) and annular boss (13) concentrically; One end that described piston rod (6) stretches into cylinder body (7) is fixedly connected with piston (8) is concentricity, and the other end of piston rod (6) stretches out cylinder body (7) through the center of guide sleeve (3) and the center of left end cap (1) successively; Described cylinder body (7) side has rod chamber hydraulic fluid port (5) and rodless cavity hydraulic fluid port (9); Described guide sleeve (3) is provided with the first seal groove (2) with the surface of contact of left end cap (1), and described first seal groove (2) internal fixtion is provided with an O RunddichtringO; Described guide sleeve (3) is provided with the second seal groove (4) with the surface of contact of cylinder body (7), and described second seal groove (4) internal fixtion is provided with the 2nd O RunddichtringO; Described guide sleeve (3) is provided with near the side of piston (8) the stepped shaft lip limit (14) being close to piston rod (6), and the thickness of the ladder of described stepped shaft lip limit (14) increases successively along with away from guide sleeve (3).
2. the oil hydraulic cylinder with stepped shaft lip limit guide sleeve according to claim 1, it is characterized in that: described stepped shaft lip limit (14) distributes in three sections of ladders, rightmost side ladder is the first ladder, secondary right side ladder is the second ladder, leftmost side ladder is the 3rd ladder, described first ladder outer surface and guide sleeve (3) internal face distance d
1=2-3mm, the second ladder outer surface and guide sleeve (3) internal face distance d
2=(0.7-0.8) d
1, the 3rd ladder outer surface and guide sleeve (3) internal face distance d
3=(0.4-0.6) d
1; 3rd ladder left side and guide sleeve (3) right side distance b
1=9-12mm, the second ladder left side and guide sleeve (3) right side distance b
2=(0.6-0.7) b
1, the first ladder left side and guide sleeve (3) right side distance b
3=(0.3-0.35) b
1; The 3rd ladder left ladder place fillet radius R on stepped shaft lip limit (14)
1=0.4-0.55mm, right ladder place fillet radius R
2=(0.5-0.6) R
1, the second ladder right ladder place fillet radius R
3=R
2.
3. the oil hydraulic cylinder with stepped shaft lip limit guide sleeve according to claim 2, is characterized in that: the internal face that described guide sleeve (3) contacts with piston rod (6) has rhombus texture (11) and rectangle balancing slit (12).
4. the oil hydraulic cylinder with stepped shaft lip limit guide sleeve according to claim 3, is characterized in that: the quantity of described rectangle balancing slit (12) is 3 roads, 5 roads, 7 roads or 9 roads.
5. the oil hydraulic cylinder with stepped shaft lip limit guide sleeve according to claim 4, is characterized in that: described rhombus texture (11) and rectangle balancing slit (12) are alternately uniformly distributed in the axial direction.
6. the oil hydraulic cylinder with stepped shaft lip limit guide sleeve according to claim 5, it is characterized in that: when described rhombus texture (11) is uniformly distributed with circumferencial direction in the axial direction, be arranged on rhombus texture (3) the spacing L=0.8-1mm vertically between twice rectangle balancing slit (12), rhombus texture (11) width B in axial direction=(0.5-0.6) L, along the circumferential direction the radial depth H=0.2-0.3L of rhombus texture (11); Along the circumferential direction adjacent two rhombus texture (11) angle α=8-12 degree, along the circumferential direction angle β=(0.6-0.8) α of rhombus texture (11).
7. the oil hydraulic cylinder with stepped shaft lip limit guide sleeve according to any one of claim 1-6, is characterized in that: described guide sleeve (3) material is tin bronze.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510395979.1A CN105041765A (en) | 2015-07-07 | 2015-07-07 | Hydraulic cylinder with stepped lip edge guide sleeve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510395979.1A CN105041765A (en) | 2015-07-07 | 2015-07-07 | Hydraulic cylinder with stepped lip edge guide sleeve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105041765A true CN105041765A (en) | 2015-11-11 |
Family
ID=54448627
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510395979.1A Pending CN105041765A (en) | 2015-07-07 | 2015-07-07 | Hydraulic cylinder with stepped lip edge guide sleeve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105041765A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112555225A (en) * | 2020-12-11 | 2021-03-26 | 彭志远 | Guide sleeve for hydraulic cylinder |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1408121A1 (en) * | 1984-11-19 | 1988-07-07 | Брянский Завод Ирригационных Машин | Hydraulic cylinder |
| CN101498327A (en) * | 2009-02-27 | 2009-08-05 | 武汉科技大学 | Oil film supporting servo hydraulic cylinder |
| CN201925261U (en) * | 2010-12-01 | 2011-08-10 | 安徽星马汽车股份有限公司 | Split gland of concrete pumping cylinder |
| CN202707674U (en) * | 2012-08-10 | 2013-01-30 | 中船重工中南装备有限责任公司 | Novel hydraulic cylinder |
| DE102012217531A1 (en) * | 2012-09-27 | 2014-03-27 | Jungheinrich Aktiengesellschaft | Hydraulic cylinder e.g. lifting cylinder, for e.g. industrial truck, has spiral groove serving as throttle element of damping device for throttling discharge of medium from one of chamber areas to end area of driving-out movement area |
| CN204152892U (en) * | 2014-10-17 | 2015-02-11 | 重庆大江工业有限责任公司 | A kind of hydraulic cylinder guide sleeve |
| CN104454757A (en) * | 2014-11-12 | 2015-03-25 | 三一重型装备有限公司 | Hydraulic cylinder and cylinder cover structure thereof |
| CN204327645U (en) * | 2013-12-04 | 2015-05-13 | 徐州徐工液压件有限公司 | Hydraulic jack anti-deforming guide structure |
| CN104747528A (en) * | 2014-07-23 | 2015-07-01 | 施周平 | Hydraulic oil cylinder |
| CN204985140U (en) * | 2015-07-07 | 2016-01-20 | 武汉科技大学 | Pneumatic cylinder with stairstepping lip limit uide bushing |
-
2015
- 2015-07-07 CN CN201510395979.1A patent/CN105041765A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1408121A1 (en) * | 1984-11-19 | 1988-07-07 | Брянский Завод Ирригационных Машин | Hydraulic cylinder |
| CN101498327A (en) * | 2009-02-27 | 2009-08-05 | 武汉科技大学 | Oil film supporting servo hydraulic cylinder |
| CN201925261U (en) * | 2010-12-01 | 2011-08-10 | 安徽星马汽车股份有限公司 | Split gland of concrete pumping cylinder |
| CN202707674U (en) * | 2012-08-10 | 2013-01-30 | 中船重工中南装备有限责任公司 | Novel hydraulic cylinder |
| DE102012217531A1 (en) * | 2012-09-27 | 2014-03-27 | Jungheinrich Aktiengesellschaft | Hydraulic cylinder e.g. lifting cylinder, for e.g. industrial truck, has spiral groove serving as throttle element of damping device for throttling discharge of medium from one of chamber areas to end area of driving-out movement area |
| CN204327645U (en) * | 2013-12-04 | 2015-05-13 | 徐州徐工液压件有限公司 | Hydraulic jack anti-deforming guide structure |
| CN104747528A (en) * | 2014-07-23 | 2015-07-01 | 施周平 | Hydraulic oil cylinder |
| CN204152892U (en) * | 2014-10-17 | 2015-02-11 | 重庆大江工业有限责任公司 | A kind of hydraulic cylinder guide sleeve |
| CN104454757A (en) * | 2014-11-12 | 2015-03-25 | 三一重型装备有限公司 | Hydraulic cylinder and cylinder cover structure thereof |
| CN204985140U (en) * | 2015-07-07 | 2016-01-20 | 武汉科技大学 | Pneumatic cylinder with stairstepping lip limit uide bushing |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112555225A (en) * | 2020-12-11 | 2021-03-26 | 彭志远 | Guide sleeve for hydraulic cylinder |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204419752U (en) | A kind of oil hydraulic cylinder based on Surface Texture hydrodynamic lubrication performance | |
| CN101324245B (en) | Hydraulic cylinder of low friction force | |
| US7954823B2 (en) | Sealing ring for reciprocating motion | |
| CN202327104U (en) | Variable taper type wave-shaped curved surface mechanical seal device | |
| CN101725588A (en) | Hydraulic cylinder with clearance sealed type deformed piston | |
| CN204985140U (en) | Pneumatic cylinder with stairstepping lip limit uide bushing | |
| CN101498327A (en) | Oil film supporting servo hydraulic cylinder | |
| CN102162479A (en) | Composite boosting oil cylinder | |
| CN105041765A (en) | Hydraulic cylinder with stepped lip edge guide sleeve | |
| CN202867395U (en) | Low-friction high-frequency sound hydraulic cylinder | |
| CN104747428B (en) | Self-adaptive unbalance loading combined type valve plate for plunger pump | |
| CA3078031C (en) | Annular sealing assembly | |
| CN111237163A (en) | Piston ring sealing system with long service life | |
| CN211573723U (en) | Long-life piston ring sealing system | |
| CN104564901B (en) | A kind of low friction hydraulic cylinder based on miniature round pool | |
| CN107269520B (en) | Magnetic compensation floating side plate sub-assembly | |
| CN105065675A (en) | Seal ring with streamline groove end face and mechanical seal device | |
| CN108895056A (en) | A kind of static pressure chamber bearing guiding device hydraulic cylinder | |
| CN209067582U (en) | A kind of sealing piston of hydraulic cylinder device that seal clearance is variable | |
| CN105179157A (en) | Outer-curve radial plunger hydraulic motor | |
| CN206801847U (en) | A kind of piston that can improve nuclear submarine rudder arrangement servo variable pump sealing property | |
| CN109296592B (en) | Piston assembly for high-pressure low-friction hydraulic cylinder | |
| CN205064173U (en) | Radial plunger hydraulic motor of outer curve | |
| CN107642486B (en) | Novel plunger pump static pressure supports side cap | |
| CN203009155U (en) | Oil distribution disc of hydraulic motor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20151111 |
|
| WD01 | Invention patent application deemed withdrawn after publication |