CN103867526B - A kind of low friction dynamic and static back guide sleeve oil hydraulic cylinder - Google Patents
A kind of low friction dynamic and static back guide sleeve oil hydraulic cylinder Download PDFInfo
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- CN103867526B CN103867526B CN201410144495.5A CN201410144495A CN103867526B CN 103867526 B CN103867526 B CN 103867526B CN 201410144495 A CN201410144495 A CN 201410144495A CN 103867526 B CN103867526 B CN 103867526B
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- oil groove
- guide sleeve
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- static pressure
- pressure oil
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Abstract
The present invention relates to a kind of low friction dynamic and static back guide sleeve oil hydraulic cylinder.Its technological scheme is: the hole wall of described guide sleeve (4) is provided with equably three I-shaped active and static pressure oil grooves (8), the middle part vertical slot of I-shaped groove is arranged vertically, be axial oil groove, two that communicate with axial oil groove two ends symmetrical translots circumferentially, are Circumferential oil groove.The middle position of each active and static pressure oil groove (8) radially has oil inlet hole (9), and oil inlet hole (9) side of each active and static pressure oil groove (8) bottom radially has pressure tap (10); Two hydrostatic support grooves (13) are provided with symmetrically between active and static pressure oil groove (8), the side of active and static pressure oil groove (8) has annular drain pan (6), annular drain pan (6) is near the side of end cap (5), and the bottom of annular drain pan (6) radially has oil leak hole (7).The present invention have frictional force little, wear and tear little, frequency response is high, reliability is high, the life-span is long, be conducive to piston correction, structure is simple and the feature of easy accessibility.
Description
Technical field
The invention belongs to oil hydraulic cylinder technical field.Particularly relate to a kind of low friction dynamic and static back guide sleeve oil hydraulic cylinder.
Background technique
Since self-application oil hydraulic cylinder, Sealing between guide sleeve and piston, has all been adopted to seal, to prevent hydraulic fluid leak to the outer befouling environment of cylinder.Such a structure increases surface friction drag during piston rod movement, be difficult to the dynamic performance improving oil hydraulic cylinder, and shorten the operating life of oil hydraulic cylinder.Oil hydraulic cylinder with seal ring perplexs the raising of hydraulic system performance always, particularly the raising of Hydrauservo System performance.Traditional mode improves Sealing material, improves seal configuration to reach the wearing and tearing reducing frictional force and piston rod as much as possible, but poor effect.Also be difficult to adapt to high-speed motion and high frequency response requirement simultaneously.
The many employings of existing hydrostatic support oil hydraulic cylinder four rectangle oil recess structures, need four throttle valve adjustment oil pocket pressure, increase and regulate difficulty; Four rectangle oil pocket independent bearings, positive loading capability is little, easy to wear; It is a strong point that the using dynamic and static pressures of single oil pocket is concentrated, and is unfavorable for the correction of piston rod and piston.
In sum, there are the following problems for existing oil hydraulic cylinder: frictional force is large, and piston rod easily weares and teares, and operating life is short, and frequency response is low.
Summary of the invention
The present invention is intended to overcome above-mentioned technological deficiency, object be propose a kind of frictional force little, wear and tear little, frequency response is high, reliability is high, the life-span is long, be conducive to piston correction, structure simply and the low friction dynamic and static back guide sleeve oil hydraulic cylinder of easy accessibility.
To achieve these goals, the technical solution used in the present invention is: described low friction dynamic and static back guide sleeve oil hydraulic cylinder comprises cylinder body, piston, piston rod, guide sleeve and end cap.End cap is fixedly equipped with in one end of cylinder body, the inner side surface that end cap is close to by guide sleeve is fixed in cylinder body concentrically, piston loads in cylinder body actively, and one end of piston rod is fixedly connected with concentrically with piston, and the other end of piston rod passes the center hole of guide sleeve and end cap.Cylinder body has the first hydraulic fluid port and the second hydraulic fluid port, and the first hydraulic fluid port is near guide sleeve, and the second hydraulic fluid port is near the end of the cylinder body the other end.
The hole wall of described guide sleeve is provided with equably three active and static pressure oil grooves, three active and static pressure oil grooves form three active and static pressure oil pockets with the cylndrical surface of piston rod respectively.Three active and static pressure oil grooves are I-shaped groove, and the middle part vertical slot of I-shaped groove is arranged vertically, is axial oil groove; Two that communicate with axial oil groove two ends symmetrical translots circumferentially, are Circumferential oil groove; The middle position of each active and static pressure oil groove radially has oil inlet hole, and the oil inlet hole side bottom each active and static pressure oil groove radially has pressure tap, and pressure tap is near the side of rod chamber.Between active and static pressure oil groove, be provided with two hydrostatic support grooves symmetrically, two hydrostatic support grooves are all positioned on each self-corresponding hole wall element line.The side of active and static pressure oil groove has annular drain pan, and annular drain pan is near the side of end cap, and the bottom of annular drain pan radially has oil leak hole.
The arc length of hydrostatic support groove and the Circumferential oil groove arc length sum of active and static pressure oil groove are 1 ~ 1.2 times of guide sleeve hole wall girth.
Piston and inboard wall of cylinder block adopt clearance seal, and gap value is 15 ~ 30 μm; Gap between piston rod and guide sleeve is 15 ~ 30 μm; Piston rod and end cap adopt seal ring to seal.
The radian of the Circumferential oil groove of described active and static pressure oil groove is 50 ~ 70 °, and the wide of Circumferential oil groove is 10 ~ 20mm, Circumferential oil groove be 1 ~ 2mm deeply; The wide of axial oil groove is 20 ~ 30mm, axial oil groove be 1 ~ 2mm deeply.
The material of described guide sleeve is bronze.
Owing to adopting technique scheme, the present invention adopts clearance seal, is provided with three I-shaped active and static pressure oil grooves in gap, and three active and static pressure oil grooves form three active and static pressure oil pockets with the cylndrical surface of piston rod respectively; After supply pressure oil, have again throttle valve pressure regulation, make active and static pressure oil pocket form gap and self-compensating pressure, piston rod is remained in guide sleeve, and pressure film supports, save the seal ring between piston and cylinder body, seal ring between piston rod and guide sleeve, reduce wearing and tearing.Two circumferential oil pockets of active and static pressure oil pocket are all supporting points, are conducive to correcting tilting of the piston, reduce piston wear.Adopt three I-shaped active and static pressure oil pockets to reach the uniformity of piston rod support pressure completely, simplify the structure.Between I-shaped active and static pressure oil pocket, machined two hydrostatic support grooves, to strengthen hydrostatic support effect, favourable active and static pressure oil film is formed.In order to prevent piston rod and guide sleeve fluid from leaking, the side of active and static pressure oil pocket has annular drain pan, and the bottom of annular drain pan radially has oil leak hole, by oil leak hole, fluid is flowed to fuel tank.
Therefore the present invention compared with prior art tool have the following advantages:
1, three active and static pressure oil pockets are formed and stand like the legs of a tripod, and make support pressure even, make frictional force little, reduce wearing and tearing;
2, the dynamic and static back point of each active and static pressure oil pocket is two, is more conducive to piston rod and piston correction;
3, active and static pressure oil pocket and hydrostatic support groove are linked to be two bearing rings in guide sleeve, play effectively with one heart, reduce the leakage and wearing and tearing that increase because piston rod is eccentric.
4, piston rod is when high-speed straight-line moves, and always has pressure oil to play supporting and lubrication, improve frequency response, add reliability between each active and static pressure oil pocket.
Therefore, the present invention have frictional force little, wear and tear little, frequency response is high, reliability is high, the life-span is long, be conducive to piston correction, structure is simple and the feature of easy accessibility.
Accompanying drawing explanation
Fig. 1 is a kind of structural representation of the present invention;
Fig. 2 is that the inwall of guide sleeve 4 in Fig. 1 launches planimetric map.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described further, not limiting the scope of the invention.
embodiment 1
A kind of low friction dynamic and static back guide sleeve oil hydraulic cylinder.As shown in Figure 1, described low friction dynamic and static back guide sleeve oil hydraulic cylinder comprises cylinder body 1, piston 2, piston rod 3, guide sleeve 4 and end cap 5.End cap 5 is fixedly equipped with in one end of cylinder body 1, the inner side surface that end cap 5 is close to by guide sleeve 4 is fixed in cylinder body 1 concentrically, piston 2 loads in cylinder body 1 actively, and one end of piston rod 3 is fixedly connected with concentrically with piston 2, and the other end of piston rod 3 passes the center hole of guide sleeve 4 and end cap 5.Cylinder body 1 has the first hydraulic fluid port 11 and the second hydraulic fluid port 12, first hydraulic fluid port 11 near guide sleeve 4, and the second hydraulic fluid port 12 is near the end of cylinder body 1 the other end.
The hole wall of described guide sleeve 4 is provided with equably three active and static pressure oil grooves, 8, three active and static pressure oil grooves 8 and forms three active and static pressure oil pockets with the cylndrical surface of piston rod 3 respectively.Fig. 2 is that the inwall of guide sleeve 4 launches planimetric map, and as shown in Figure 2, three active and static pressure oil grooves 8 are I-shaped groove, and the middle part vertical slot of I-shaped groove is arranged vertically, is axial oil groove; Two that communicate with axial oil groove two ends symmetrical translots circumferentially, are Circumferential oil groove; The middle position of each active and static pressure oil groove 8 radially has oil inlet hole 9, and oil inlet hole 9 side bottom each active and static pressure oil groove 8 radially has pressure tap 10, and pressure tap 10 is near the side of rod chamber.Between active and static pressure oil groove 8, be provided with two hydrostatic support grooves, 13, two hydrostatic support grooves 13 symmetrically be all positioned on each self-corresponding hole wall element line.The side of active and static pressure oil groove 8 has annular drain pan 6, and annular drain pan 6 is near the side of end cap 5, and the bottom of annular drain pan 6 radially has oil leak hole 7.
The arc length of hydrostatic support groove 13 and the Circumferential oil groove arc length sum of active and static pressure oil groove 8 are 1 ~ 1.1 times of guide sleeve 4 hole wall girth.
Piston 2 and cylinder body 1 inwall adopt clearance seal, and gap value is 15 ~ 25 μm; Gap between piston rod 3 and guide sleeve 4 is 15 ~ 25 μm; Piston rod 3 and end cap 5 adopt seal ring to seal.
The radian of the Circumferential oil groove of described active and static pressure oil groove 8 is 50 ~ 60 °, and the wide of Circumferential oil groove is 10 ~ 15mm, Circumferential oil groove be 1 ~ 1.5mm deeply; The wide of axial oil groove is 20 ~ 25mm, axial oil groove be 1 ~ 1.5mm deeply.
The material of described guide sleeve 4 is bronze.
embodiment 2
A kind of low friction dynamic and static back guide sleeve oil hydraulic cylinder.Except following technical parameter, all the other are with embodiment 1.
The arc length of hydrostatic support groove 13 and the Circumferential oil groove arc length sum of active and static pressure oil groove 8 are 1.1 ~ 1.2 times of guide sleeve 4 hole wall girth.
Piston 2 and cylinder body 1 inwall adopt clearance seal, and gap value is 20 ~ 30 μm; Gap between piston rod 3 and guide sleeve 4 is 20 ~ 30 μm.
The radian of the Circumferential oil groove of described active and static pressure oil groove 8 is 60 ~ 70 °, and the wide of Circumferential oil groove is 15 ~ 20mm, Circumferential oil groove be 1.5 ~ 2mm deeply; The wide of axial oil groove is 25 ~ 30mm, axial oil groove be 1.5 ~ 2mm deeply.
This embodiment adopts clearance seal, is provided with three I-shaped active and static pressure oil grooves, 8, three active and static pressure oil grooves 8 and forms three active and static pressure oil pockets with the cylndrical surface of piston rod 3 respectively in gap; After supply pressure oil, there is again throttle valve pressure regulation, make active and static pressure oil pocket form gap and self-compensating pressure, make piston rod 3 remain that pressure film supports in guide sleeve 4, save the seal ring between piston 2 and cylinder body 1, seal ring between piston rod 3 and guide sleeve 4, reduce wearing and tearing.Two circumferential oil pockets of active and static pressure oil pocket are all supporting points, are conducive to correcting tilting of the piston, reduce piston wear.Adopt three I-shaped active and static pressure oil pockets to reach the uniformity of piston rod support pressure completely, simplify the structure.Between I-shaped active and static pressure oil pocket, machined two hydrostatic support grooves 13, to strengthen hydrostatic support effect, favourable active and static pressure oil film is formed.In order to prevent piston rod 3 and guide sleeve 4 fluid from leaking, the side of active and static pressure oil pocket has annular drain pan 6, and the bottom of annular drain pan 6 radially has oil leak hole 7, by oil leak hole 7, fluid is flowed to fuel tank.
Therefore this embodiment compared with prior art tool have the following advantages:
1, three active and static pressure oil pockets are formed and stand like the legs of a tripod, and make support pressure even, make frictional force little, reduce wearing and tearing;
2, the dynamic and static back point of each active and static pressure oil pocket is two, is more conducive to rectifying a deviation to piston rod 3 and piston 2;
3, active and static pressure oil pocket and hydrostatic support groove 13 are linked to be two bearing rings in guide sleeve 4, play effectively with one heart, reduce the leakage and wearing and tearing that increase because piston rod 3 is eccentric.
4, piston rod 3 is when high-speed straight-line moves, and always has pressure oil to play supporting and lubrication, improve frequency response, add reliability between each active and static pressure oil pocket.
Therefore, this embodiment have frictional force little, wear and tear little, frequency response is high, reliability is high, the life-span is long, be conducive to piston correction, structure is simple and the feature of easy accessibility.
Claims (3)
1. one kind low friction dynamic and static back guide sleeve oil hydraulic cylinder, it is characterized in that: described low friction dynamic and static back guide sleeve oil hydraulic cylinder comprises cylinder body (1), piston (2), piston rod (3), guide sleeve (4) and end cap (5); End cap (5) is fixedly equipped with in one end of cylinder body (1), the inner side surface that end cap (5) is close to by guide sleeve (4) is fixed in cylinder body (1) concentrically, piston (2) loads in cylinder body (1) actively, one end of piston rod (3) is fixedly connected with concentrically with piston (2), and the other end of piston rod (3) passes the center hole of guide sleeve (4) and end cap (5); Cylinder body (1) has the first hydraulic fluid port (11) and the second hydraulic fluid port (12), first hydraulic fluid port (11) is near guide sleeve (4), and the second hydraulic fluid port (12) is near the end of cylinder body (1) the other end;
The hole wall of described guide sleeve (4) is provided with equably three active and static pressure oil grooves (8), three active and static pressure oil grooves (8) are I-shaped groove, the middle part vertical slot of I-shaped groove is arranged vertically, be axial oil groove, two that communicate with axial oil groove two ends symmetrical translots circumferentially, are Circumferential oil groove; The middle position of each active and static pressure oil groove (8) radially has oil inlet hole (9), oil inlet hole (9) side of each active and static pressure oil groove (8) bottom radially has pressure tap (10), and pressure tap (10) is near the side of rod chamber; Between active and static pressure oil groove (8), be provided with two hydrostatic support grooves (13) symmetrically, two hydrostatic support grooves (13) are all positioned on each self-corresponding hole wall element line; The side of active and static pressure oil groove (8) has annular drain pan (6), annular drain pan (6) is near the side of end cap (5), and the bottom of annular drain pan (6) radially has oil leak hole (7);
The arc length of hydrostatic support groove (13) and the Circumferential oil groove arc length sum of active and static pressure oil groove (8) are 1 ~ 1.2 times of guide sleeve (4) hole wall girth;
Piston (2) and cylinder body (1) inwall adopt clearance seal, and gap value is 15 ~ 30 μm; Gap between piston rod (3) and guide sleeve (4) is 15 ~ 30 μm; Piston rod (3) and end cap (5) adopt seal ring to seal.
2. low friction dynamic and static back guide sleeve oil hydraulic cylinder according to claim 1, its feature is 50 ~ 70 ° at the radian of the Circumferential oil groove of described active and static pressure oil groove (8), and the wide of Circumferential oil groove is 10 ~ 20mm, Circumferential oil groove be 1 ~ 2mm deeply; The wide of axial oil groove is 20 ~ 30mm, axial oil groove be 1 ~ 2mm deeply.
3. low friction dynamic and static back guide sleeve oil hydraulic cylinder according to claim 1, is characterized in that the material of described guide sleeve (4) is for bronze.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410144495.5A CN103867526B (en) | 2014-04-11 | 2014-04-11 | A kind of low friction dynamic and static back guide sleeve oil hydraulic cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410144495.5A CN103867526B (en) | 2014-04-11 | 2014-04-11 | A kind of low friction dynamic and static back guide sleeve oil hydraulic cylinder |
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| Publication Number | Publication Date |
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| CN103867526A CN103867526A (en) | 2014-06-18 |
| CN103867526B true CN103867526B (en) | 2015-10-21 |
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| CN201410144495.5A Expired - Fee Related CN103867526B (en) | 2014-04-11 | 2014-04-11 | A kind of low friction dynamic and static back guide sleeve oil hydraulic cylinder |
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| CN104766755B (en) * | 2014-11-17 | 2017-09-26 | 平高集团有限公司 | Operating mechanism energy storage device and the hydraulic actuating mechanism using the device |
| CN104632755B (en) * | 2014-12-31 | 2016-09-07 | 太原科技大学 | A kind of heavily loaded servo hydraulic cylinder of anti-bias load |
| CN104989696B (en) * | 2015-07-03 | 2017-04-12 | 武汉科技大学 | Variable-gap sealing type hydraulic cylinder of guide system |
| CN107013528A (en) * | 2017-05-03 | 2017-08-04 | 哈尔滨理工大学 | A kind of low friction static pressure oil film guide hydraulic cylinder |
| CN108194453A (en) * | 2018-03-22 | 2018-06-22 | 哈尔滨理工大学 | A kind of hydrostatic support sealing fluid cylinder pressure of anti-bias load |
| CN108895056A (en) * | 2018-07-28 | 2018-11-27 | 韶关液压件厂有限公司 | A kind of static pressure chamber bearing guiding device 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 |
| CN110030226A (en) * | 2019-04-19 | 2019-07-19 | 武汉科技大学 | A kind of anti-bias load hydraulic cylinder based on heterogeneous frictional interface elastohydrodynamic lubrication performance |
| CN111980986A (en) * | 2020-08-19 | 2020-11-24 | 江苏恒立液压股份有限公司 | Single-rod high-frequency impact test hydraulic cylinder |
| CN113983026A (en) * | 2021-10-12 | 2022-01-28 | 中国重型机械研究院股份公司 | Long-life high-frequency actuating servo hydraulic cylinder |
| CN115898827A (en) * | 2022-11-24 | 2023-04-04 | 上海羿弓氢能科技有限公司 | Novel high-frequency action decompression cylinder for diaphragm compressor |
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| JPH06144255A (en) * | 1992-11-10 | 1994-05-24 | Toyota Autom Loom Works Ltd | Hydraulic cylinder |
| JP3009605B2 (en) * | 1995-04-28 | 2000-02-14 | 株式会社椿本チエイン | Hydraulic tensioner |
| CN100373059C (en) * | 2006-04-27 | 2008-03-05 | 中冶连铸技术工程股份有限公司 | Hydraulic cylinder with static pressure support guide |
| CN101324245B (en) * | 2008-07-03 | 2010-12-08 | 武汉科技大学 | Hydraulic cylinder of low friction force |
| CN101498327A (en) * | 2009-02-27 | 2009-08-05 | 武汉科技大学 | Oil film supporting servo hydraulic cylinder |
| CN101725588B (en) * | 2009-11-10 | 2012-05-23 | 武汉科技大学 | Hydraulic cylinder with clearance sealed type deformed piston |
| CN101832307A (en) * | 2010-01-26 | 2010-09-15 | 西安交通大学 | Frictionless balancing cylinder |
| CN102705295A (en) * | 2012-05-30 | 2012-10-03 | 马鞍山市裕华机械制造有限公司 | Guide sleeve of hydraulic oil cylinder |
| CN203770299U (en) * | 2014-04-11 | 2014-08-13 | 武汉科技大学 | Dynamic and static pressure gap seal guide sleeve hydraulic cylinder |
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Granted publication date: 20151021 Termination date: 20160411 |