CN104500498B - A kind of pressure changeable oil feeding type anti-bias load horizontal servo oil cylinder method for designing - Google Patents
A kind of pressure changeable oil feeding type anti-bias load horizontal servo oil cylinder method for designing Download PDFInfo
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- CN104500498B CN104500498B CN201410845041.0A CN201410845041A CN104500498B CN 104500498 B CN104500498 B CN 104500498B CN 201410845041 A CN201410845041 A CN 201410845041A CN 104500498 B CN104500498 B CN 104500498B
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- oil
- lubricating pad
- pressure
- piston rod
- pad
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Classifications
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- 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
-
- 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
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/04—Special measures taken in connection with the properties of the fluid
- F15B21/041—Removal or measurement of solid or liquid contamination, e.g. filtering
Abstract
The invention discloses a kind of pressure changeable oil feeding type anti-bias load horizontal servo oil cylinder method for designing, horizontal servo oil cylinder includes cylinder body and piston rod, oil cylinder guide sleeve arranges upper and lower asymmetric lubricating pad (5,10) in the axial direction, wherein piston rod (1) downside lubricating pad is for supporting lubricating pad (10), and piston rod (1) upside lubricating pad is support reaction lubricating pad (5)；Being passed into pressure oil by independent oil supply system to each lubricating pad, the pressure of the pressure oil that oil supply system provides is controlled by proportional pressure control valve (9) simultaneously.The present invention, by supporting the application of lubricating pad and support reaction lubricating pad, by being provided pressure oil by independent oil supply system to each lubricating pad, increases bearing capacity and the offset load resistance of system, substantially prolongs the reliability of horizontal servo oil cylinder and life-span.
Description
Technical field
The invention belongs to servo-hydraulic field, be specifically related to a kind of pressure changeable oil feeding type anti-bias load horizontal servo oil cylinder method for designing, it is adaptable to the industries such as high low speed, high frequency, heavy duty, the large-scale metallurgical equipment that bears under the bad working environments such as radial force.
Background technology
Servo-cylinder is the executive component of Hydrauservo System, and to realize high accuracy, high response controls.The performance quality of servo-cylinder directly affects control accuracy and the sound state quality of system, thus the design of servo-cylinder need to have excellent steering capability, low friction, without leaking outside, without creeping, without advantages such as inertia unsmooth, little, high response, long-lives, the requirement of servosystem static accuracy, dynamic quality could be met better.The stress of general oil cylinder belongs to desirable two power bar states, and piston rod is solely subjected to axial force, it does not have radial force.Owing to installation, carrying characteristic or other reasons can cause having certain radial force to exist on the piston rod in practical application so that piston rod rubs partially with fairlead, piston and cylinder barrel existence, has a strong impact on output characteristics and the reliability of servoBcylinder.Reduce and even overcome the radial force impact on servoBcylinder characteristic and reliability of service life, be the significant design of servosystem and servo-cylinder and the main contents of control mode design.
Summary of the invention
The present invention provides a kind of pressure changeable oil feeding type anti-bias load horizontal servo oil cylinder method for designing, described horizontal servo oil cylinder includes cylinder body and piston rod, oil cylinder guide sleeve arranges upper and lower asymmetric lubricating pad in the axial direction, wherein on the downside of piston rod, lubricating pad is for supporting lubricating pad, and on the upside of piston rod, lubricating pad is support reaction lubricating pad；Being passed into pressure oil by independent oil supply system to each lubricating pad, the pressure of the pressure oil that oil supply system provides is by proportional pressure control valve control simultaneously.
Wherein, oil supply system is made up of fuel tank, hydraulic pump, proportional pressure control valve and filter, and the oil-out of hydraulic pump connects proportional pressure control valve and filter respectively.
Wherein, lubricating pad is made up of oil pocket, center fuel feed hole, sealing oil edge and oil-recovery tank, is respectively connected to a displacement transducer in supporting the oil pocket of lubricating pad and support reaction lubricating pad.
Wherein, the pressure oil of hydraulic pump output enters in lubricating pad by lubricating pad centre bore, detected the position of piston rod by displacement transducer and then control the setting pressure of proportional pressure control valve, now in oil pocket, oil pressure is P, fluid flows out through the sealing oil edge of lubricating pad, fuel tank is flowed back to by oil-recovery tank, supporting in lubricating pad oil pocket owing to acting on of oil pressure P forms certain support force on the downside of piston rod in this process, and the size of this support force can adjust automatically along with the change in elevation of gap h, in this process, the support reaction lubricating pad on the upside of piston rod also adjusts pressure with the change of gap h, piston rod is made to be suspended in fairlead and cylinder body, it is finally reached self adaptation.
Wherein, described upper and lower asymmetric lubricating pad is one or more pairs of.
The present invention, by supporting the application of lubricating pad and support reaction lubricating pad, by being provided pressure oil by independent oil supply system to each lubricating pad, increases bearing capacity and the offset load resistance of system, substantially prolongs the reliability of horizontal servo oil cylinder and life-span.
Accompanying drawing explanation
Fig. 1: pressure changeable oil feeding type anti-bias load horizontal servo cylinder structure schematic diagram of the present invention；
Fig. 2: the piston rod force diagram of pressure changeable oil feeding type anti-bias load horizontal servo oil cylinder of the present invention.
Description of reference numerals:
1-piston rod；2-cylinder body；
3-sensor；4-support reaction oil-recovery tank；
5-support reaction lubricating pad；6-filter；
7-hydraulic pump；8-fuel tank；
9-proportional pressure control valve；10-supports lubricating pad；
11-supports oil-recovery tank.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is specifically described.
As shown in Figure 1, the horizontal servo oil cylinder of the present invention includes cylinder body 2 and piston rod 1, oil cylinder guide sleeve arranges one or more pairs of upper and lower asymmetric lubricating pad in the axial direction, wherein on the downside of piston rod 1, lubricating pad, for supporting lubricating pad 10, supports lubricating pad 10 and is made up of oil pocket, center fuel feed hole, sealing oil edge and support oil-recovery tank 11.On the upside of piston rod 1, lubricating pad is support reaction lubricating pad 5, and support reaction lubricating pad 5 is made up of oil pocket, center fuel feed hole, sealing oil edge, support reaction oil-recovery tank 4.And passed into pressure oil by independent oil supply system to each lubricating pad simultaneously.Oil supply system includes fuel tank 8, hydraulic pump 7, proportional pressure control valve 9 and filter 6, and the oil-out of hydraulic pump 7 connects proportional pressure control valve 9 and filter 6, hydraulic pump 7 fuel feeding respectively, and hydraulic pump 7 output pressure Ps is controlled by proportional pressure control valve 9.A displacement transducer 3 respectively it is connected to, for monitoring the position of piston rod and forming the input control instruction of proportional pressure control valve in supporting lubricating pad 10 and support reaction lubricating pad 5.
Owing to support reaction lubricating pad 5 setting up and down and support lubricating pad 10 are asymmetric, after passing into pressure oil in lubricating pad, upper and lower lubricating pad just forms couple, the radial force that this couple causes for balance external load and piston rod deadweight etc..
Structure shown in Fig. 1, the fluid of hydraulic pump 7 output pressure Ps supplies each lubricating pad, and pressure oil is entered in lubricating pad by lubricating pad centre bore, and now in oil pocket, oil pressure is P, and pressure oil flows out through the sealing oil edge of lubricating pad, flows back to fuel tank 8 by oil-recovery tank.In the process, supporting in lubricating pad 10 oil pocket owing to acting on of oil pressure P forms certain support force on the downside of piston rod 1, and the size of this support force can adjust automatically along with the change in elevation of oil clearance h, in this process, the support reaction lubricating pad 5 on the upside of piston rod 1 also adjusts pressure with the change of gap h, piston rod 1 is made to be suspended in fairlead and in cylinder body 2, be finally reached self adaptation.
Fig. 2 illustrates the pressure schematic diagram of anti-bias load horizontal servo oil cylinder of the present invention.
When cylinder efficient, the additional radial pressure FL formed by outer load can cause that piston rod 1 front end has and deflect down tendency around barycenter O, make to support lubricating pad 10 and the sealing oil edge of support reaction lubricating pad 5 to change with the gap h of piston rod 1, and then have influence on the pressure size in the oil pocket of each lubricating pad, as shown in Figure 2:
Force balance type: F1=FL+F2+G
Moment-equilibrium equation: FL*L1=F1*L2+F2*L3+G*L4
In fig. 2, as radial force FLIncrease, due to the existence of barycenter O, support lubricating pad 10 and the sealing oil edge of support reaction lubricating pad 5 and all reduce with the gap of piston rod 1.Load decision systems pressure, increase due to offset loading force, system charge oil pressure increases, when system pressure is sufficiently large, oil pocket pressure F1 and the F2 of piston rod about 1 lubricating pad all increases, forming bigger retroaction couple, the couple that the couple after this increase is formed with outer load offsets, thus reaching the purpose of balance external load.Along with the motion change of piston rod 1 in work process, the radial force that outer load is formed also can change, and then cause that piston rod 1 makes corresponding change with sealing oil edge gap, in upper and lower lubricating pad, the pressure of oil pocket will make corresponding adjustment, makes piston rod 1 realize the counterbalance effect of self adaptation centering in fairlead.
In whole work process, self gravitation by piston and piston rod, the unbalanced couple that outer carrying is formed, in certain scope, the couple that all can change pressure change in the oil pocket that be caused upper and lower lubricating pad by gap between piston rod and sealing oil edge and formed carries out Automatic adjusument, all the time make to keep between piston rod and piston and fairlead and cylinder body certain gap, form film lubrication, reduce piston rod and fairlead, the friction of piston and cylinder body, increase bearing capacity and the offset load resistance of system, substantially prolongs the reliability of horizontal servo oil cylinder and life-span.
Claims (7)
1. a pressure changeable oil feeding type anti-bias load horizontal servo oil cylinder method for designing, horizontal servo oil cylinder includes cylinder body and piston rod, it is characterised in that:
Oil cylinder guide sleeve arranges upper and lower asymmetric lubricating pad (5,10) in the axial direction, wherein piston rod (1) downside lubricating pad is for supporting lubricating pad (10), and piston rod (1) upside lubricating pad is support reaction lubricating pad (5)；
Being passed into pressure oil by independent oil supply system to each lubricating pad, the pressure of the pressure oil that oil supply system provides is controlled by proportional pressure control valve (9) simultaneously.
2. method for designing according to claim 1, it is characterized in that: oil supply system is made up of fuel tank (8), hydraulic pump (7), proportional pressure control valve (9) and filter (6), the oil-out of hydraulic pump (7) connects proportional pressure control valve (9) and filter (6) respectively.
3. method for designing according to claim 1 and 2, it is characterized in that: lubricating pad (5,10) is made up of oil pocket, center fuel feed hole, sealing oil edge and oil-recovery tank, in supporting the oil pocket of lubricating pad (10) and support reaction lubricating pad (5), be respectively connected to a displacement transducer (3).
4. method for designing according to claim 3, it is characterised in that: the pressure oil that hydraulic pump (7) exports enters in lubricating pad by the center fuel feed hole of lubricating pad, displacement transducer detect the position of piston rod and then control the setting pressure of proportional pressure control valve.
5. method for designing according to claim 4, it is characterized in that: in oil pocket, oil pressure is P, fluid flows out through the sealing oil edge of lubricating pad, fuel tank (8) is flowed back to by oil-recovery tank, owing to acting on of oil pressure P forms certain support force in support lubricating pad (10) oil pocket of piston rod (1) downside in this process, and the size of this support force can adjust along with the change of charge oil pressure, in this process, the support reaction lubricating pad (5) of piston rod (1) upside also adjusts pressure with the change of charge oil pressure, piston rod (1) is made to be suspended in fairlead and cylinder body (2), it is finally reached self adaptation.
6. the method for designing according to any one of claim 1,2,4,5, it is characterised in that: described upper and lower asymmetric lubricating pad (5,10) is a pair.
7. the method for designing according to any one of claim 1,2,4,5, it is characterised in that: described upper and lower asymmetric lubricating pad (5,10) is for multipair.
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| CN201410845041.0A CN104500498B (en) | 2014-12-31 | 2014-12-31 | A kind of pressure changeable oil feeding type anti-bias load horizontal servo oil cylinder method for designing |
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| CN201410845041.0A CN104500498B (en) | 2014-12-31 | 2014-12-31 | A kind of pressure changeable oil feeding type anti-bias load horizontal servo oil cylinder method for designing |
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| CN104500498B true CN104500498B (en) | 2016-07-06 |
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| 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 |
| CN110173481B (en) * | 2019-05-29 | 2020-07-03 | 太原科技大学 | Hydraulic test bed control system with offset load and dead weight cooperative compensation |
Citations (6)
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| DE3026788C2 (en) * | 1980-07-15 | 1987-01-02 | Hydromatik Gmbh, 7900 Ulm, De | |
| JPH0539804A (en) * | 1991-08-01 | 1993-02-19 | Kayaba Ind Co Ltd | Cylinder device |
| JPH10169609A (en) * | 1996-12-12 | 1998-06-23 | Mitsubishi Heavy Ind Ltd | Static pressure bearing for hydraulic servo cylinder |
| JP2002327710A (en) * | 2001-04-27 | 2002-11-15 | Teruyuki Maeda | Air cylinder in use of static pressure bearing |
| CN101498327A (en) * | 2009-02-27 | 2009-08-05 | 武汉科技大学 | Oil film supporting servo hydraulic cylinder |
| CN202251235U (en) * | 2011-09-19 | 2012-05-30 | 广东天恒液压机械有限公司 | Oil tank sealing and static pressure supporting device for high-frequency vibration |
-
2014
- 2014-12-31 CN CN201410845041.0A patent/CN104500498B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3026788C2 (en) * | 1980-07-15 | 1987-01-02 | Hydromatik Gmbh, 7900 Ulm, De | |
| JPH0539804A (en) * | 1991-08-01 | 1993-02-19 | Kayaba Ind Co Ltd | Cylinder device |
| JPH10169609A (en) * | 1996-12-12 | 1998-06-23 | Mitsubishi Heavy Ind Ltd | Static pressure bearing for hydraulic servo cylinder |
| JP2002327710A (en) * | 2001-04-27 | 2002-11-15 | Teruyuki Maeda | Air cylinder in use of static pressure bearing |
| CN101498327A (en) * | 2009-02-27 | 2009-08-05 | 武汉科技大学 | Oil film supporting servo hydraulic cylinder |
| CN202251235U (en) * | 2011-09-19 | 2012-05-30 | 广东天恒液压机械有限公司 | Oil tank sealing and static pressure supporting device for high-frequency vibration |
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