CN102374208A - Aerostatic bearing guiding cylinder without friction interference - Google Patents
Aerostatic bearing guiding cylinder without friction interference Download PDFInfo
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- CN102374208A CN102374208A CN2011103462333A CN201110346233A CN102374208A CN 102374208 A CN102374208 A CN 102374208A CN 2011103462333 A CN2011103462333 A CN 2011103462333A CN 201110346233 A CN201110346233 A CN 201110346233A CN 102374208 A CN102374208 A CN 102374208A
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Abstract
The invention relates to an aerostatic bearing guiding cylinder without friction interference. In the cylinder, a sliding guiding structure and a rubber ring sealing structure adopted by the traditional cylinder mechanism are changed, linear aerostatic bearing guiding replaces the traditional sliding guiding, and clearance sealing replaces the traditional rubber ring sealing, thus, a frictional force generated when a piston and a piston rod move relatively is greatly reduced, the influence of friction interference force on movement precision is weakened, and the accurate and precise control capacity of the acting force of the cylinder is improved.
Description
Technical field
The present invention is the no frictional interference cylinder of a kind of aerostatic bearing guiding, belongs to the technical field of structures of product.
Background technique
Cylinder is the actuator commonly used in the industrial products, is used to realize displacement transmission and Thrust Control.In some occasion, need carry out accurate and constant control to the thrust of cylinder.Because the influence of the frictional force that rubber sealing that adopts in traditional air cylinder structure and slide-and-guide cause, cylinder thrust can not realize accurately, accurate and constant control; Because the sliding friction force direction is always opposite with moving direction, makes the actual thrust of cylinder receive the interference of frictional force and can not realize constant; And frictional force is non-linear force, and the actual thrust of cylinder can not realize accurate and accurate control.
The tradition cylinder is as shown in Figure 1, and O-ring seal B adopts the mode of interference to cooperate with piston rod A or cylinder sleeve F usually, to guarantee sealing effect, so can produce with bigger kinetic friction resistance.Between piston rod A and the guide sleeve D, all adopt the guiding that is slidingly matched between piston E and the cylinder liner F, also can produce certain kinetic friction resistance.The direction of frictional force is always opposite with moving direction, so when the constant pressure of cylinder air feed C, along with the variation of cylinder moving direction, frictional force can make the size of cylinder thrust output change; And frictional force is non-linear viscous resistance, and along with the variation of speed, the size of frictional force also can change; So frictional force has great influence to the accuracy and the constancy of cylinder thrust in this structure.In the occasion that cylinder thrust accuracy is had higher control requirement, the use of traditional cylinder has narrow limitation.
Characteristics such as that traditional rubber sealing air cylinder structure has is simple and reliable for structure, low cost of manufacture, service condition are less demanding have wide range of applications, but in the occasion that needs precise motion control, have certain performance deficiency.
In lathe with vertical motion parts and instrument and equipment, often need carry out accurate gravitational equilibrium to the moving-mass of vertical motion parts, accurate gravitational equilibrium is the basis of realizing precise motion control.The cylinder balancing method is one of frequent method that adopts of vertical motion parts gravitational equilibrium.Precision and ultra-precision machine tool are very high to the requirement of gravitational equilibrium, not only require accurately stable gravitational equilibrium, and the non-linear force that requires balance sysmte to produce disturbs minimum to the kinematic accuracy of machine tool guideway system.
Summary of the invention
The present invention designs to the shortcoming that exists in the above-mentioned existing technology just provides a kind of aerostatic bearing guiding no frictional interference cylinder; Its purpose is exactly in order to overcome traditional cylinder in the defective that exists aspect the precise motion control; A kind of mechanism that realizes accurate control with cylinder thrust is provided; Realize the cylinder moving mechanism of no friction interference power, this mechanism adopts aerostatic bearing to do the guiding and the sealing of cylinder, does not have the motion of friction interference power when realizing cylinder moving; Thrust output is accurate, accurate and constant when realizing cylinder moving, realizes the fine balance control of cylinder.
The objective of the invention is to realize through following technological scheme:
The no frictional interference cylinder of this kind aerostatic bearing guiding; Comprise cylinder liner and air vent thereof, piston rod, piston and piston rod guide sleeve; It is characterized in that: on piston rod guide sleeve and the contacted annular inner surface of piston rod; Be processed with radially evenly distributed piston rod guiding aerostatic bearing accessory air-space along circumference; Each piston rod guiding aerostatic bearing accessory air-space links to each other with the air feed mouth to the bearing throttle orifice through the radial piston rod guidance that is processed in the piston rod guide sleeve; Make and form the aerostatic bearing pair between piston rod and the guide sleeve, in addition, on piston rod guide sleeve and the contacted annular inner surface of piston rod, between piston rod guiding aerostatic bearing accessory air-space and cylinder pressure chamber; Also be processed with a pressure release ring that communicates with ambient atmosphere, between pressure release ring and the cylinder pressure chamber, piston rod guide sleeve and the contacted annular inner surface of piston rod adopt little clearance seal;
On piston and the contacted annular outer surface of cylinder liner; Be processed with radially evenly distributed piston guide aerostatic bearing accessory air-space along circumference; Each piston guide aerostatic bearing accessory air-space through be processed in the piston radial piston guide bearing throttle orifice with link to each other through the piston guide hydrostatic bearing air vent in the piston; Make and form the aerostatic bearing pair between piston and the cylinder liner; In addition; On piston and the contacted annular outer surface of cylinder liner, between piston guide aerostatic bearing accessory air-space and cylinder pressure chamber, also be processed with a pressure release ring that communicates with ambient atmosphere, between pressure release ring and the cylinder pressure chamber, piston and the contacted annular outer surface of cylinder liner adopt little clearance seal.
This mechanism changes gliding movement targeting structure and the rubber sealing that traditional cylinder mechanism adopts; Adopt the aerostatic bearing linear movement guide to replace traditional slide-and-guide; Adopt clearance seal to replace traditional rubber sealing; Thereby friction interference power is to the influence of kinematic accuracy when greatly having reduced piston motion, and the control that has improved cylinder action power is accurate.
Aerostatic bearing adopts air as lubricant medium, and the friction factor of static air pressure is very little, have only under the normal condition below one of the percentage of the coefficient of sliding friction, and the variation of the The friction coefficient movement velocity of static air pressure is little, the frictional force substantially constant.So substantially invariable Thrust Control when aerostatic bearing guiding cylinder can be realized cylinder moving does not have the motion of friction interference power when realizing cylinder moving, realize the accurate, accurate and constant of cylinder thrust output, realize the fine balance control of cylinder.
Description of drawings
Fig. 1 is the structural representation of existing cylinder
Fig. 2 is the structural representation of cylinder of the present invention
Embodiment
Below with reference to accompanying drawing and embodiment technical scheme of the present invention is done to describe in detail further:
Shown in accompanying drawing 2; The no frictional interference cylinder of this kind aerostatic bearing guiding; Comprise cylinder liner 4 and air vent 13 thereof, piston rod 1, piston 5 and piston rod guide sleeve 6; It is characterized in that: on piston rod guide sleeve 6 and piston rod 1 contacted annular inner surface, be processed with radially evenly distributed piston rod guiding aerostatic bearing accessory air-space 7 along circumference, each piston rod guiding aerostatic bearing accessory air-space 7 links to each other with air feed mouth 8 to bearing throttle orifice 2 through being processed in piston rod guide sleeve 6 interior radial piston rod guidance; Make and form the aerostatic bearing pair between piston rod 1 and the guide sleeve 6; In addition, on piston rod guide sleeve 6 and the piston rod 1 contacted annular inner surface, between piston rod guiding aerostatic bearing accessory air-space 7 and cylinder pressure chamber 9, also be processed with a pressure release ring 10 that communicates with ambient atmosphere; Between pressure release ring 10 and the cylinder pressure chamber 9, piston rod guide sleeve 6 adopts little clearance seal with piston rod 1 contacted annular inner surface, this clearance D 1 is 0.008 millimeter;
On piston 5 and cylinder liner 4 contacted annular outer surfaces; Be processed with radially evenly distributed piston guide aerostatic bearing accessory air-space 11 along circumference; Each piston guide aerostatic bearing accessory air-space 11 through be processed in the piston 5 radial piston guide bearing throttle orifice 3 with link to each other through the piston guide hydrostatic bearing air vent 12 in the piston; Make and form the aerostatic bearing pair between piston 5 and the cylinder liner 4; In addition, on piston 5 and cylinder liner 4 contacted annular outer surfaces, between piston guide aerostatic bearing accessory air-space 11 and cylinder pressure chamber 9, also be processed with a pressure release ring 10 that communicates with ambient atmosphere; Between pressure release ring 10 and the cylinder pressure chamber 9, piston 5 adopts little clearance seal with cylinder liner 4 contacted annular outer surfaces, this clearance D 2 is 0.009 millimeter.
Structure of the present invention is the guiding and the realization of sealing employing aerostatic bearing structure with cylinder piston rod 1 and piston 5.Be that a complete aerostatic bearing is secondary between piston rod 1 and the piston rod guide sleeve 6, do not have the solid contact friction fully between piston rod 1 and the piston rod guide sleeve 6.Be that a complete aerostatic bearing is secondary between piston 5 and the cylinder liner 4, do not have the solid contact friction fully between piston 5 and the cylinder liner 4.
In above structure; On piston rod guide sleeve 6, be evenly equipped with 8 piston rod guiding aerostatic bearing accessory air-spaces 7 and corresponding piston rod guide bearing throttle orifice 2; Piston rod guide bearing throttle orifice 2 diameters are 0.15 millimeter; Piston rod guiding aerostatic bearing accessory air-space 7 degree of depth are 0.18 millimeter, and the matching gap D1 between piston rod guide sleeve 6 and the piston rod 1 is 0.008 millimeter, have realized the aerostatic bearing guiding and the contactless sealing of piston rod 1 motion.
On piston 5, also be evenly equipped with 8 piston guide aerostatic bearing accessory air-spaces 11 and corresponding piston guide bearing throttle orifice 3; The diameter of piston guide bearing throttle orifice 3 is 0.15 millimeter; The degree of depth of piston guide aerostatic bearing accessory air-space 11 is 0.18 millimeter; Matching gap D2 between piston 5 and the cylinder liner 4 is 0.009 millimeter, has realized the aerostatic bearing guiding and the contactless sealing of piston 5 motions.
Piston rod guiding aerostatic bearing and piston guide hydrostatic bearing are 4 * 10 through the pressure of air vent 8 and air vent 12 air feed
5During Pascal,, be in complete float state during cylinder moving through experimental test, no solid contact friction resistance, resistance is less than 20 grams, more than the little one magnitude of resistance to motion that can realize than traditional cylinder during low-speed motion.
Compared with prior art; Frictional force when technological scheme of the present invention has greatly reduced cylinder moving; Improved the accuracy and the accuracy of cylinder ouput force, substantially invariable ouput force in the time of can realizing cylinder moving is favourable to the realization ten minutes of the precision control that realizes cylinder moving and micro-displacement.
Claims (1)
1. the no frictional interference cylinder of aerostatic bearing guiding; Comprise cylinder liner (4) and air vent (13) thereof, piston rod (1), piston (5) and piston rod guide sleeve (6) etc.; It is characterized in that: on piston rod guide sleeve (6) and the contacted annular inner surface of piston rod (1); Be processed with radially evenly distributed piston rod guiding aerostatic bearing accessory air-space (7) along circumference; Each piston rod guiding aerostatic bearing accessory air-space (7) links to each other with air feed mouth (8) to bearing throttle orifice (2) through the radial piston rod guidance that is processed in the piston rod guide sleeve (6); Make and form the aerostatic bearing pair between piston rod (1) and the guide sleeve (6); In addition; On piston rod guide sleeve (6) and the contacted annular inner surface of piston rod (1), between piston rod guiding aerostatic bearing accessory air-space (7) and cylinder pressure chamber (9), also be processed with a pressure release ring (10) that communicates with ambient atmosphere, between pressure release ring (10) and cylinder pressure chamber (9), piston rod guide sleeve (6) and the contacted annular inner surface of piston rod (1) adopt little clearance seal;
On piston (5) and the contacted annular outer surface of cylinder liner (4); Be processed with radially evenly distributed piston guide aerostatic bearing accessory air-space (11) along circumference; Each piston guide aerostatic bearing accessory air-space (11) is through being processed in the interior radial piston guide bearing throttle orifice (3) of piston (5) and linking to each other through the piston guide hydrostatic bearing air vent (12) in the piston; Make and form the aerostatic bearing pair between piston (5) and the cylinder liner (4); In addition; On piston (5) and the contacted annular outer surface of cylinder liner (4), between piston guide aerostatic bearing accessory air-space (11) and cylinder pressure chamber (9), also be processed with a pressure release ring (10) that communicates with ambient atmosphere, between pressure release ring (10) and cylinder pressure chamber (9), piston (5) and the contacted annular outer surface of cylinder liner (4) adopt little clearance seal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103462333A CN102374208A (en) | 2011-11-04 | 2011-11-04 | Aerostatic bearing guiding cylinder without friction interference |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103462333A CN102374208A (en) | 2011-11-04 | 2011-11-04 | Aerostatic bearing guiding cylinder without friction interference |
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| CN102374208A true CN102374208A (en) | 2012-03-14 |
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| CN2011103462333A Pending CN102374208A (en) | 2011-11-04 | 2011-11-04 | Aerostatic bearing guiding cylinder without friction interference |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103016441A (en) * | 2012-12-31 | 2013-04-03 | 浙江工业大学 | Air flotation cylinder for forming stable air film by microporous material |
| CN103016442A (en) * | 2012-12-31 | 2013-04-03 | 浙江工业大学 | Air suspension friction-free air cylinder provided with spherical hinge and uninfluenced by high pressure gas |
| CN103047221A (en) * | 2012-12-31 | 2013-04-17 | 浙江工业大学 | Double-acting air-suspending friction-free air cylinder |
| CN104265764A (en) * | 2014-09-23 | 2015-01-07 | 哈尔滨工程大学 | Ring-belt multi-throttler type static pressure gas cylinder bearing |
| CN104806584A (en) * | 2015-04-20 | 2015-07-29 | 广东工业大学 | Frictionless quick-response balance system |
| CN105179362A (en) * | 2015-09-02 | 2015-12-23 | 张响芝 | Unbalance load-resisting servo oil cylinder |
| CN105298799A (en) * | 2014-06-24 | 2016-02-03 | Lg电子株式会社 | Linear compressor |
| CN106870507A (en) * | 2017-04-26 | 2017-06-20 | 四川森洁燃气设备有限公司 | Can anti-polarization cylinder dynamic structure |
| 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 |
| CN108953471A (en) * | 2018-07-10 | 2018-12-07 | 哈尔滨工业大学 | It is a kind of without friction gravity unloading mechanism |
| CN113700697A (en) * | 2021-08-25 | 2021-11-26 | 江苏大学 | Friction adjustable cylinder based on vacuum generator |
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| US4932313A (en) * | 1988-09-30 | 1990-06-12 | Gutknecht William H | Air bearing piston and cylinder assembly |
| CN1309247A (en) * | 2000-02-18 | 2001-08-22 | 速睦喜股份有限公司 | Fluid pressure cylinder |
| JP3803474B2 (en) * | 1997-10-17 | 2006-08-02 | シーケーディ株式会社 | Air bearing cylinder and cylinder system |
| CN101087949A (en) * | 2004-12-22 | 2007-12-12 | 艾罗拉斯有限公司 | Piston/cylinder unit |
| CN102155465A (en) * | 2011-03-24 | 2011-08-17 | 浙江大学 | Zero-friction air cylinder with air bearing |
-
2011
- 2011-11-04 CN CN2011103462333A patent/CN102374208A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4932313A (en) * | 1988-09-30 | 1990-06-12 | Gutknecht William H | Air bearing piston and cylinder assembly |
| JP3803474B2 (en) * | 1997-10-17 | 2006-08-02 | シーケーディ株式会社 | Air bearing cylinder and cylinder system |
| CN1309247A (en) * | 2000-02-18 | 2001-08-22 | 速睦喜股份有限公司 | Fluid pressure cylinder |
| CN101087949A (en) * | 2004-12-22 | 2007-12-12 | 艾罗拉斯有限公司 | Piston/cylinder unit |
| CN102155465A (en) * | 2011-03-24 | 2011-08-17 | 浙江大学 | Zero-friction air cylinder with air bearing |
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103016442B (en) * | 2012-12-31 | 2015-12-30 | 浙江工业大学 | A kind of gas suspension do not affected by pressurized gas with spherical hinge is without friction cylinder |
| CN103047221B (en) * | 2012-12-31 | 2015-12-30 | 浙江工业大学 | Double-action gas suspension is without friction cylinder |
| CN103016441A (en) * | 2012-12-31 | 2013-04-03 | 浙江工业大学 | Air flotation cylinder for forming stable air film by microporous material |
| CN103016442A (en) * | 2012-12-31 | 2013-04-03 | 浙江工业大学 | Air suspension friction-free air cylinder provided with spherical hinge and uninfluenced by high pressure gas |
| CN103047221A (en) * | 2012-12-31 | 2013-04-17 | 浙江工业大学 | Double-acting air-suspending friction-free air cylinder |
| CN103016441B (en) * | 2012-12-31 | 2015-02-18 | 浙江工业大学 | Air flotation cylinder for forming stable air film by microporous material |
| CN105298799A (en) * | 2014-06-24 | 2016-02-03 | Lg电子株式会社 | Linear compressor |
| US10352313B2 (en) | 2014-06-24 | 2019-07-16 | Lg Electronics Inc. | Linear compressor |
| CN105298799B (en) * | 2014-06-24 | 2017-07-21 | Lg电子株式会社 | Linearkompressor |
| CN104265764A (en) * | 2014-09-23 | 2015-01-07 | 哈尔滨工程大学 | Ring-belt multi-throttler type static pressure gas cylinder bearing |
| CN104806584A (en) * | 2015-04-20 | 2015-07-29 | 广东工业大学 | Frictionless quick-response balance system |
| CN104806584B (en) * | 2015-04-20 | 2017-02-01 | 广东工业大学 | Frictionless quick-response balance system |
| CN105179362A (en) * | 2015-09-02 | 2015-12-23 | 张响芝 | Unbalance load-resisting servo oil cylinder |
| CN106870507A (en) * | 2017-04-26 | 2017-06-20 | 四川森洁燃气设备有限公司 | Can anti-polarization cylinder dynamic structure |
| 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 |
| CN108953471A (en) * | 2018-07-10 | 2018-12-07 | 哈尔滨工业大学 | It is a kind of without friction gravity unloading mechanism |
| CN113700697A (en) * | 2021-08-25 | 2021-11-26 | 江苏大学 | Friction adjustable cylinder based on vacuum generator |
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Application publication date: 20120314 |