CN103867526A - Low-friction hybrid support guide sleeve hydraulic cylinder - Google Patents
Low-friction hybrid support guide sleeve hydraulic cylinder Download PDFInfo
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- CN103867526A CN103867526A CN201410144495.5A CN201410144495A CN103867526A CN 103867526 A CN103867526 A CN 103867526A CN 201410144495 A CN201410144495 A CN 201410144495A CN 103867526 A CN103867526 A CN 103867526A
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Abstract
The invention relates to a low-friction hybrid support guide sleeve hydraulic cylinder. According to the technical scheme, three I-shaped hybrid oil grooves (8) are evenly formed in a hole wall of a guide sleeve (4), the middle vertical groove body of each I-shaped groove is axially arranged, namely the middle vertical groove body of each I-shaped groove is an axial oil groove, and the two symmetrical horizontal groove bodies communicated with the two ends of the corresponding axial oil groove are arranged in the peripheral direction, namely the horizontal groove bodies of each I-shaped groove are peripheral oil grooves; an oil inlet (9) is formed in the middle of each hybrid oil groove (8) in the radial direction, a pressure measuring hole (10) is formed in one side of the part, located on the bottom of the corresponding hybrid oil groove (8), of each oil inlet (9) in the radial direction, two static pressure support grooves (13) are symmetrically arranged between the hybrid oil grooves (8), an annular oil drainage groove (6) is formed in one side of each hybrid oil groove (8) and is close to one side of an end cover (5), and an oil drainage hole (7) is formed in the bottom of each annular oil drainage groove (6) in the radial direction. The low-friction hybrid support guide sleeve hydraulic cylinder has the advantages of being low in friction, light in abrasion, high in frequency response, high in reliability, long in service life, capable of facilitating piston deviation rectification, simple in structure, and convenient to dismantle.
Description
Technical field
The invention belongs to oil hydraulic cylinder technical field.Relate in particular to a kind of low friction active and static pressure support guide sleeve oil hydraulic cylinder.
Background technique
Since self-application oil hydraulic cylinder, between guide sleeve and piston, all adopt Sealing to seal, to prevent hydraulic fluid leak befouling environment outside cylinder.Surface friction drag when this structure has increased piston rod movement, is difficult to improve the dynamic performance of oil hydraulic cylinder, and has shortened 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 is to improve Sealing material, improves seal configuration to reach the wearing and tearing that reduce as much as possible frictional force and piston rod, but poor effect.Also be difficult to adapt to high-speed motion and high frequency response requirement simultaneously.
Four rectangle oil recess structures of the many employings of existing hydrostatic support oil hydraulic cylinder, 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 that piston is rectified a deviation, the low friction active and static pressure support guide sleeve oil hydraulic cylinder of simple in structure and easy accessibility.
To achieve these goals, the technical solution used in the present invention is: described low friction active and static pressure support 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 guide sleeve is close to end cap is fixed in cylinder body concentrically, piston packs 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.
On the hole wall of described guide sleeve, be 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 symmetrical translots that communicate with axial oil groove two ends, along circumferential arrangement, are Circumferential oil groove; The neutral position place of each active and static pressure oil groove radially has oil inlet hole, and oil inlet hole one side of each active and static pressure oil groove bottom radially has pressure tap, and pressure tap is near a side of rod chamber.Between active and static pressure oil groove, be provided with symmetrically two hydrostatic support grooves, two hydrostatic support grooves are all positioned on each self-corresponding hole wall element line.One side of active and static pressure oil groove has annular drain pan, and annular drain pan is near a side of end cap, and the bottom of annular drain pan radially has draining hole.
The Circumferential oil groove arc length sum of the arc length of hydrostatic support groove and active and static pressure oil groove is 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 μ m; Gap between piston rod and guide sleeve is 15～30 μ m; Piston rod and end cap adopt seal ring sealing.
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; Supply with after pressure oil, there is again throttle valve pressure regulation, make active and static pressure oil pocket form gap and pressure auto-compensation, make piston rod in guide sleeve, remain pressure film supporting, save the seal ring between seal ring, piston rod and the guide sleeve between piston and cylinder body, reduce wearing and tearing.Two circumferential oil pockets of active and static pressure oil pocket are all supporting points, are conducive to correct 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, process two hydrostatic support grooves, to strengthen hydrostatic support effect, favourable active and static pressure oil film forms.In order to prevent that piston rod and guide sleeve fluid from leaking, a side of active and static pressure oil pocket has annular drain pan, and the bottom of annular drain pan radially has draining hole, by draining 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 form and stand like the legs of a tripod, and make support pressure even, make frictional force little, reduce wearing and tearing;
2, the active and static pressure supporting 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, have reduced because of eccentric leakage and the wearing and tearing that increase of piston rod.
4, piston rod, in the time that high-speed straight-line moves, always has pressure oil to play supporting and lubrication between each active and static pressure oil pocket, has improved frequency response, has increased reliability.
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, the feature of simple in structure and 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 active and static pressure support guide sleeve oil hydraulic cylinder.As shown in Figure 1, described low friction active and static pressure support 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 guide sleeve 4 is close to end cap 5 is fixed in cylinder body 1 concentrically, piston 2 packs 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 have the first hydraulic fluid port 11 and the second hydraulic fluid port 12, the first hydraulic fluid ports 11 near guide sleeve 4, the second hydraulic fluid ports 12 end near cylinder body 1 the other end.
On the hole wall of described guide sleeve 4, be provided with equably 8, three active and static pressure oil grooves 8 of three active and static pressure oil grooves and form 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 symmetrical translots that communicate with axial oil groove two ends, along circumferential arrangement, are Circumferential oil groove; The neutral position place of each active and static pressure oil groove 8 radially has oil inlet hole 9, and oil inlet hole 9 one sides of each active and static pressure oil groove 8 bottoms radially have pressure tap 10, and pressure tap 10 is near a side of rod chamber.All be positioned on each self-corresponding hole wall element line being provided with symmetrically 13, two hydrostatic support grooves 13 of two hydrostatic support grooves between active and static pressure oil groove 8.One side of active and static pressure oil groove 8 has annular drain pan 6, and annular drain pan 6 is near a side of end cap 5, and the bottom of annular drain pan 6 radially has draining hole 7.
The Circumferential oil groove arc length sum of the arc length of hydrostatic support groove 13 and active and static pressure oil groove 8 is 1 ~ 1.1 times of guide sleeve 4 hole wall girths.
Piston 2 adopts clearance seal with cylinder body 1 inwall, and gap value is 15～25 μ m; Gap between piston rod 3 and guide sleeve 4 is 15～25 μ m; Piston rod 3 adopts seal ring sealing with end cap 5.
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 active and static pressure support guide sleeve oil hydraulic cylinder.Except following technical parameter, all the other are with embodiment 1.
The Circumferential oil groove arc length sum of the arc length of hydrostatic support groove 13 and active and static pressure oil groove 8 is 1.1 ~ 1.2 times of guide sleeve 4 hole wall girths.
Piston 2 adopts clearance seal with cylinder body 1 inwall, and gap value is 20～30 μ m; Gap between piston rod 3 and guide sleeve 4 is 20～30 μ m.
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 8, three active and static pressure oil grooves 8 of three I-shaped active and static pressure oil grooves and forms three active and static pressure oil pockets with the cylndrical surface of piston rod 3 respectively in gap; Supply with after pressure oil, there is again throttle valve pressure regulation, make active and static pressure oil pocket form gap and pressure auto-compensation, make piston rod 3 in guide sleeve 4, remain pressure film supporting, save the seal ring between seal ring, piston rod 3 and the guide sleeve 4 between piston 2 and cylinder body 1, reduce wearing and tearing.Two circumferential oil pockets of active and static pressure oil pocket are all supporting points, are conducive to correct 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, process two hydrostatic support grooves 13, to strengthen hydrostatic support effect, favourable active and static pressure oil film forms.In order to prevent that piston rod 3 and guide sleeve 4 fluid from leaking, a side of active and static pressure oil pocket has annular drain pan 6, and the bottom of annular drain pan 6 radially has draining hole 7, by draining 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 form and stand like the legs of a tripod, and make support pressure even, make frictional force little, reduce wearing and tearing;
2, the active and static pressure supporting point of each active and static pressure oil pocket is two, is more conducive to piston rod 3 and piston 2 to be rectified a deviation;
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, have reduced because of eccentric leakage and the wearing and tearing that increase of piston rod 3.
4, piston rod 3, in the time that high-speed straight-line moves, always has pressure oil to play supporting and lubrication between each active and static pressure oil pocket, has improved frequency response, has increased reliability.
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, the feature of simple in structure and easy accessibility.
Claims (3)
1. one kind low friction active and static pressure support guide sleeve oil hydraulic cylinder, it is characterized in that: described low friction active and static pressure support 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 guide sleeve (4) is close to end cap (5) is fixed in cylinder body (1) concentrically, piston (2) packs 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), the 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;
On the hole wall of described guide sleeve (4), be 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 symmetrical translots that communicate with axial oil groove two ends, along circumferential arrangement, are Circumferential oil groove; The neutral position place of each active and static pressure oil groove (8) radially has oil inlet hole (9), oil inlet hole (9) one sides of each active and static pressure oil groove (8) bottom radially have pressure tap (10), and pressure tap (10) is near a side of rod chamber; Between active and static pressure oil groove (8), be provided with symmetrically two hydrostatic support grooves (13), two hydrostatic support grooves (13) are all positioned on each self-corresponding hole wall element line; One side of active and static pressure oil groove (8) has annular drain pan (6), annular drain pan (6) is near a side of end cap (5), and the bottom of annular drain pan (6) radially has draining hole (7);
The Circumferential oil groove arc length sum of the arc length of hydrostatic support groove (13) and active and static pressure oil groove (8) is 1 ~ 1.2 times of guide sleeve (4) hole wall girth;
Piston (2) adopts clearance seal with cylinder body (1) inwall, and gap value is 15～30 μ m; Gap between piston rod (3) and guide sleeve (4) is 15～30 μ m; Piston rod (3) adopts seal ring sealing with end cap (5).
2. low friction active and static pressure support 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), 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 active and static pressure support guide sleeve oil hydraulic cylinder according to claim 1, the material that it is characterized in that described guide sleeve (4) is 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 |
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| Application Number | Priority Date | Filing Date | Title |
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| 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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| CN103867526A true CN103867526A (en) | 2014-06-18 |
| CN103867526B CN103867526B (en) | 2015-10-21 |
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Cited By (11)
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| CN104632755A (en) * | 2014-12-31 | 2015-05-20 | 太原科技大学 | Anti-unbalance-loading overloading servo hydraulic cylinder |
| CN104766755A (en) * | 2014-11-17 | 2015-07-08 | 平高集团有限公司 | Energy storage device for operating mechanisms and hydraulic operating mechanism using same |
| CN104989696A (en) * | 2015-07-03 | 2015-10-21 | 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 |
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| 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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Cited By (15)
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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 |
| CN104766755A (en) * | 2014-11-17 | 2015-07-08 | 平高集团有限公司 | Energy storage device for operating mechanisms and hydraulic operating mechanism using same |
| 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 |
| CN104632755A (en) * | 2014-12-31 | 2015-05-20 | 太原科技大学 | Anti-unbalance-loading overloading servo hydraulic cylinder |
| CN104989696B (en) * | 2015-07-03 | 2017-04-12 | 武汉科技大学 | Variable-gap sealing type hydraulic cylinder of guide system |
| CN104989696A (en) * | 2015-07-03 | 2015-10-21 | 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 |
| CN109296592A (en) * | 2018-12-04 | 2019-02-01 | 武汉科技大学 | A kind of piston assembly for high pressure low friction hydraulic cylinder |
| CN109296592B (en) * | 2018-12-04 | 2023-12-22 | 武汉科技大学 | Piston assembly for high-pressure low-friction hydraulic cylinder |
| 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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