CN102954062A - Low-leakage magnetic buffering hydraulic cylinder - Google Patents
Low-leakage magnetic buffering hydraulic cylinder Download PDFInfo
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- CN102954062A CN102954062A CN 201210532481 CN201210532481A CN102954062A CN 102954062 A CN102954062 A CN 102954062A CN 201210532481 CN201210532481 CN 201210532481 CN 201210532481 A CN201210532481 A CN 201210532481A CN 102954062 A CN102954062 A CN 102954062A
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Abstract
The invention discloses a low-leakage magnetic buffering hydraulic cylinder, and belongs to hydraulic oil cylinders of engineering machines. The sealing of a piston utilizes a sealing component capable of radially deforming by utilizing the pressure of a working medium, so that the sealing performance during seal abrasion and high loads are ensured. Coils are wound around a connection part of a cylinder cover and a cylinder barrel, an inner cylindrical surface of the piston and a cylindrical surface of a guide sleeve, and the cylinder cover, the piston and the guide sleeve respectively form three electromagnets after the coils are electrified, so that the directions of magnetic poles of the electromagnets are controlled by respectively controlling the switch-on of the three coils and changing athe direction of current. A bidirectional buffering function of the hydraulic oil cylinder is realized through the difference of the magnetic poles of the three electromagnets.
Description
Technical field
The present invention relates to the hydraulic jack that engineering machinery is used, especially relate to a kind of hypotonic leakage field power buffering hydraulic cylinder.
Background technique
In engineering machinery, the Environmental Conditions of hydraulic jack is more abominable, and the load change that hydraulic jack bears is complicated.When hydraulic jack drags heavy parts and does high-speed motion to stroke terminal, tend to occur violent mechanical collision.In addition, the motion of piston cut also usually can cause the water hammer of pressure piping, thereby produces very large impact and noise.The generation of above mechanical shock not only affects the service behaviour of engineering machinery, and can damage other elements of hydraulic jack and hydraulic system, has very large danger.Studies show that now the impact of hydraulic jack mainly from inertial force, hydraulic thrust, overburden and Action of Gravity Field, wherein obvious with the effect of inertial force.
Domestic Sealing mostly is the rubber of various shapes or the seal ring of poly-nitrogen vinegar material, and its sealing mechanism is basically all the same, and topic exists always between seepage.External building rubber compound seal ring is because superior materials require the auxiliary equipment machining accuracy high, embody certain superiority in working life, but do not break through on the sealing mechanism, sealing effect is not very good yet, and expensive, so be very limited in the use.
Summary of the invention
The invention provides a kind of hypotonic leakage field power buffering hydraulic cylinder, the sealing configuration that this kind oil hydraulic cylinder adopts and cylinder barrel matching used with it can produce good high low pressure sealing effect.In addition, this oil hydraulic cylinder can effectively reduce the cylinder body of hydraulic oil cylinder vibrations, and the noise and the crawling problems that produce during the hydraulic jack commutation further avoid hydraulic jack and driving element to cause damage, increase the working life of hydraulic jack.
The present invention realizes with following technological scheme: a kind of hypotonic leakage field power buffering hydraulic cylinder comprises cylinder body, cylinder bottom, piston, coil, piston rod, guide sleeve, seal ring and support ring; Cylinder bottom adopts welding manner to be connected with cylinder barrel, hot-wire coil is twined in cylinder bottom and inboard wall of cylinder block junction, and hot-wire coil is twined in the guide sleeve cylndrical surface, after an end of piston rod passes guide sleeve, piston rod one end that is positioned at cylinder is equipped with piston, is wound with hot-wire coil on the piston inner cylindrical surface.Piston rod cylndrical surface axial surface has groove, and the guiding of cylinder bottom coil, piston coil and guide sleeve coil is drawn outside the cylinder body by groove respectively.Piston packing is cavity, the U font ring bodies that the pressure change of medium is out of shape in can stopping with cylinder.In above-mentioned U font ring bodies, when hydraulic cylinder works, inject working medium and make the ring bodies radial deformation, finish sealing function.Piston packing is that the compressive deformation external diameter increases.It is identical with the seal ring external diameter and the supporting ring of through hole arranged at wall thickness that the opening of U font seal ring is placed inner opening width, external diameter that a width equals U font seal ring.
Principle of the present invention is: utilize at cylinder cap and cylinder barrel junction, piston cylndrical surface and guide sleeve cylndrical surface winding around, coil electricity back cylinder cover, piston and guide sleeve form respectively three electromagnet.The electromagnet pole direction is controlled in the break-make of the electric current by controlling respectively three coils and the change of current direction.Realize the bidirectional buffering function of hydraulic jack by the difference of magnetic pole between three electromagnet.Seal ring be can be with internal pressure the U font ring bodies of radial deformation, when hydraulic cylinder works, the pressure that injects working medium makes the ring bodies radial deformation, finishes sealing function with the cylinder barrel close contact, external diameter increases behind the sealed ring deformation, prevents the seepage of hydraulic oil.
Description of drawings
Fig. 1 is hypotonic leakage field power buffering hydraulic cylinder principle schematic;
Wherein, 1, cylinder barrel, 2, cylinder bottom, 3, piston, 4, the piston coil, 5, the cylinder bottom coil, 6, piston rod, 7, guide sleeve, 8, the guide sleeve coil, 9, seal ring, 10, support ring.
Embodiment
Below in conjunction with drawings and Examples structure of the present invention is further specified.
As shown in Figure 1, hydraulic jack of the present invention comprises cylinder barrel 1, cylinder bottom 2, piston 3, piston coil 4, cylinder bottom coil 5, piston rod 6, guide sleeve 7, guide sleeve coil 8, seal ring 9 and support ring 10; Cylinder bottom 2 is welded to connect with cylinder barrel 1; Cylinder bottom 2 twines cylinder bottom coil 5 with the inboard wall of cylinder block junction, guide sleeve 7 is fixed on the opposite side of cylinder barrel 1, guide sleeve coil 8 is twined in the cylndrical surface of guide sleeve 8, after one end of piston rod 6 passes guide sleeve 7, piston rod 6 one ends that are positioned at cylinder are equipped with piston 3, are wound with piston coil 4 on piston 3 inner cylindrical surfaces; Seal ring 9 sections are the U character form structure, are fixed in the peripheral groove of piston 3, and it is identical with seal ring 9 external diameters and the supporting ring 10 of through hole arranged at wall thickness that the opening of U font seal ring 9 is placed inner opening width, external diameter that a width equals U font seal ring 9
It is different according to the On current direction,, the attraction force and the repulsive force that form between cylinder bottom coil 5, piston coil 4 and the guide sleeve coil 9 stop piston in the motion of end of travel.
Do when piston rod and to stretch out when action, the A chamber passes into working medium, pressure by zero to working pressure be a change procedure.When pressure is zero or when very little, the sealing of piston realizes by the interference of seal ring and internal diameter of cylinder.Sealing is along with the A cavity pressure increases, and by the inlet opening that communicates with the A chamber, the pressure that enters the C chamber together raises.Therefore pressure action promotes seal ring and outwards expands in the active force that the surface of seal ring produces in the C chamber, so the piston cavity sealing force is automatically to finish sealing along with the pressure increase and decrease of working medium.When piston rod was done the withdrawal action, the sealing principle in B chamber was identical with aforesaid A chamber, and the sealing principle in A chamber is identical with front fan's B chamber.
Claims (2)
1. a hypotonic leakage field power buffering hydraulic cylinder comprises cylinder barrel (1), cylinder bottom (2), piston (3), piston coil (4), cylinder bottom coil (5), piston rod (6), guide sleeve (7), guide sleeve coil (8), seal ring (9) and support ring (10); Cylinder bottom (2) is welded to connect with cylinder barrel (1); It is characterized in that, cylinder bottom (2) twines cylinder bottom coil (5) with the inboard wall of cylinder block junction, guide sleeve (7) is fixed on the opposite side of cylinder barrel (1), guide sleeve coil (8) is twined in the cylndrical surface of guide sleeve (8), after one end of piston rod (6) passes guide sleeve (7), piston rod (6) one ends that are positioned at cylinder are equipped with piston (3), are wound with piston coil (4) on piston (3) inner cylindrical surface; Seal ring (9) section is the U character form structure, be fixed in the peripheral groove of piston (3), it is identical with seal ring (9) external diameter and the supporting ring (10) of through hole arranged at wall thickness that the opening of U font seal ring (9) is placed inner opening width, external diameter that a width equals U font seal ring (9).
2. a kind of hypotonic leakage field power buffering hydraulic cylinder according to claim 1, it is characterized in that, different according to the On current direction, the attraction force and the repulsive force that form between cylinder bottom coil (5), piston coil (4) and the guide sleeve coil (9) stop piston in the motion of end of travel.Seal ring (9) be can be with internal pressure the U font ring bodies of radial deformation, when hydraulic cylinder works, the pressure that injects working medium makes the ring bodies radial deformation, finishes sealing function with cylinder barrel (1) close contact, external diameter increases after seal ring (9) distortion, prevents the seepage of hydraulic oil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210532481 CN102954062A (en) | 2012-12-11 | 2012-12-11 | Low-leakage magnetic buffering hydraulic cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210532481 CN102954062A (en) | 2012-12-11 | 2012-12-11 | Low-leakage magnetic buffering hydraulic cylinder |
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| Publication Number | Publication Date |
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| CN102954062A true CN102954062A (en) | 2013-03-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201210532481 Pending CN102954062A (en) | 2012-12-11 | 2012-12-11 | Low-leakage magnetic buffering hydraulic cylinder |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103174834A (en) * | 2013-04-10 | 2013-06-26 | 玉林市川迪机器制造有限公司 | Sealing device of excavator tension track oil cylinder |
| CN104314911A (en) * | 2014-08-20 | 2015-01-28 | 青岛开世密封工业有限公司 | Pneumatic sealing device |
| CN105156399A (en) * | 2015-08-24 | 2015-12-16 | 济南大学 | Self-adaptation sealing, anti-loosening and auxiliary motion device of hydraulic cylinder piston |
| CN109281890A (en) * | 2018-11-09 | 2019-01-29 | 湖南师范大学 | A kind of hydraulic cylinder combined sealing structure and hydraulic cylinder |
| CN109281891A (en) * | 2018-11-09 | 2019-01-29 | 湖南师范大学 | A kind of sealing piston of hydraulic cylinder device and hydraulic cylinder that seal clearance is variable |
| CN111059095A (en) * | 2019-11-26 | 2020-04-24 | 衡阳市林肯液压设备有限公司 | Hydraulic oil cylinder capable of effectively preventing hydraulic oil from running off |
-
2012
- 2012-12-11 CN CN 201210532481 patent/CN102954062A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103174834A (en) * | 2013-04-10 | 2013-06-26 | 玉林市川迪机器制造有限公司 | Sealing device of excavator tension track oil cylinder |
| CN104314911A (en) * | 2014-08-20 | 2015-01-28 | 青岛开世密封工业有限公司 | Pneumatic sealing device |
| CN105156399A (en) * | 2015-08-24 | 2015-12-16 | 济南大学 | Self-adaptation sealing, anti-loosening and auxiliary motion device of hydraulic cylinder piston |
| CN109281890A (en) * | 2018-11-09 | 2019-01-29 | 湖南师范大学 | A kind of hydraulic cylinder combined sealing structure and hydraulic cylinder |
| CN109281891A (en) * | 2018-11-09 | 2019-01-29 | 湖南师范大学 | A kind of sealing piston of hydraulic cylinder device and hydraulic cylinder that seal clearance is variable |
| CN111059095A (en) * | 2019-11-26 | 2020-04-24 | 衡阳市林肯液压设备有限公司 | Hydraulic oil cylinder capable of effectively preventing hydraulic oil from running off |
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Legal Events
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130306 |