CN102817915A - Air flotation assembly for large-scale precise rotary table - Google Patents

Air flotation assembly for large-scale precise rotary table Download PDF

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Publication number
CN102817915A
CN102817915A CN2012103212807A CN201210321280A CN102817915A CN 102817915 A CN102817915 A CN 102817915A CN 2012103212807 A CN2012103212807 A CN 2012103212807A CN 201210321280 A CN201210321280 A CN 201210321280A CN 102817915 A CN102817915 A CN 102817915A
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CN
China
Prior art keywords
air
air supporting
air flotation
bearing
support
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Pending
Application number
CN2012103212807A
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Chinese (zh)
Inventor
黎启胜
张瑞杰
张映梅
卢永刚
王云
刘伟
贾晓英
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General Engineering Research Institute China Academy of Engineering Physics
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General Engineering Research Institute China Academy of Engineering Physics
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Priority to CN2012103212807A priority Critical patent/CN102817915A/en
Publication of CN102817915A publication Critical patent/CN102817915A/en
Pending legal-status Critical Current

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Abstract

The invention discloses an air flotation assembly for a large-scale precise rotary table. The air flotation assembly comprises an air floatation support and an air flotation shaft sleeve which is sleeved on the air flotation support, wherein the air floatation support comprises a vertical barrel and a bearing base arranged at the bottom of the vertical barrel; the air flotation shaft sleeve comprises a base and a shaft drum arranged on the base; the shaft drum is sleeved outside the vertical barrel; the base is arranged on the bearing base; an air outlet hole of which the inner part and the outer part are communicated with each other is formed on the top surface of the bearing base and the wall of the vertical barrel; an air inlet hole of which the inner part and the outer part are communicated with each other is formed on the bearing base; and the air outlet hole is communicated with the air inlet hole. When the air flotation assembly is used, high-pressure gas is introduced from the air inlet hole and is exhausted from the air outlet hole, and a layer of rigid air membrane is formed between the air flotation support and the air flotation sleeve, so that large-scale heavy objects are borne by the air flotation shaft sleeve, the no-friction or small-friction rotation of the air flotation shaft sleeve relative to the air flotation support can be realized, the rotation eccentricity of the air flotation sleeve is avoided, and the borne objects can be stably rotated.

Description

Large-scale precision turntable air supporting assembly
Technical field
The present invention relates to a kind of accessory of large-scale turntable, relate in particular to a kind of air supporting assembly that can carry the large-scale precision turntable of large and heavy objects and the rotation of ability held stationary.
Background technique
Turret plant has been widely used in manufacturing industry at present, like numerical control hydraulic swivel etc.Can carry the large-scale turntable that is of large and heavy objects in the turret plant.
In existing large-scale turntable, adopt simple and mechanical device as whirligig, like the bearing connection set more; These traditional whirligigs are in that to carry workpiece weight hour no problem; But when carrying large and heavy objects, this device just breaks down easily, as: owing to be difficult to keep and bearing apparatus coaxial on center of gravity by bearing material; Cause to make bearing material steadily to move, like the centrifugal phenomenon in the rotation; Because bearing material is very heavy, so the friction between the rotation surface of contact in the whirligig is also bigger, cause wearing and tearing more serious, the lighter shortens the life-span of whirligig, and security incident appears in weight person in rotary course.
Summary of the invention
The object of the invention just is to provide in order to address the above problem a kind of air supporting assembly of the large-scale precision turntable that can carry large and heavy objects and can held stationary rotate.
In order to achieve the above object, the present invention has adopted following technological scheme:
The present invention includes the air supporting support and be set in the air supporting axle sleeve on this air supporting support, said air supporting support comprises upright tube and is arranged at the bearing of upright tube bottom; Said air supporting axle sleeve comprises base and is arranged at the beam barrel on the base; Said beam barrel is set in outside the said upright tube, and said base places on the said bearing; The air outlet hole that is interlinked to the outside in the barrel of the end face of said bearing and said upright tube is provided with, the inlet hole that is interlinked to the outside in said bearing is provided with, said air outlet hole and said inlet hole communicate.
Form a cavity jointly between the beam barrel inwall of the upright drum outer wall of air supporting support and air supporting axle sleeve, above the bearing of air supporting support and between below the base of air supporting axle sleeve, the space of said cavity is minimum, generally less than one millimeter, in addition little of tens microns.During use, heavy workpiece is installed in air-bearing shafts and puts, and inlet hole is connected with the steam outlet pipe of high pressure constant pressure air feeding device; Pressurized gas get into from inlet hole; Upright tube circumferential outer surface and the ejection of bearing upper surface from said air supporting support; In above-mentioned cavity, form the air film that one deck has rigidity, said gas mould can make the air supporting axle sleeve carry large and heavy objects, can realize that again the air supporting axle sleeve rotates with respect to the no friction or the friction of air supporting support; And make the air supporting axle sleeve off-centre that can not rotate, keep by the bearing material smooth rotation.
Particularly, said air outlet hole is a plurality of, is uniformly distributed on the barrel of end face and said upright tube of said bearing, and said inlet hole is a plurality of and is distributed in the side of said bearing.
Said air outlet hole has two kinds with the structure that communicates between the said inlet hole:
One of which, all said air outlet hole and said inlet holes all communicate; Its two, each said inlet hole and a plurality of said air outlet hole are an air-flow path, inlet hole and air outlet hole in the same air-flow path communicate.These two kinds of structures all can realize same function, and the air pressure according to high pressure constant pressure air feeding device in the application is selected suitable structure.
Further; Said air supporting assembly also comprises grating connecting ring, annulus grating, reading support and read head; Said grating connecting ring is installed on the upper end of said beam barrel; Said annulus grating is installed on the upper end of said grating connecting ring, evenly is provided with a plurality of above-below directions and corresponding each other unthreaded hole on the said grating connecting ring with on the said annulus grating; Said reading support is installed on the upper end of said upright tube, and said read head is installed on the said reading support, and the position of the unthreaded hole on the position of said read head and the said annulus grating is corresponding.
In the application, the signal output part of read head is connected with the induced signal input end of central control unit.Read head is installed on the upright tube through the reading support, remains static; The annulus grating is installed on the beam barrel through the grating connecting ring, is in the state of rotatablely moving.Owing on the annulus grating equally distributed unthreaded hole is arranged; So read head can be sensed the position of unthreaded hole; And this signal is transferred to central control unit; Central control unit goes out the accurate angle of swing of beam barrel according to this calculated signals, and controls the air supporting axle sleeve through rotating driving device and realize the highi degree of accuracy rotation.
As preferably, said read head is active photoreceptor.
Beneficial effect of the present invention is:
The present invention is set in the structure of air supporting support outside through the air-bearing shafts cover; And inlet hole and air outlet hole be set on the air supporting support; Thereby between air supporting support and air supporting axle sleeve, form the air film that one deck has rigidity; Realized the large and heavy objects carrying and do not had friction or the friction rotation, and kept by the bearing material smooth rotation;
The present invention is installed in read head on the upright tube through the reading support; The annulus grating that will have even distribution unthreaded hole is installed on the beam barrel through the grating connecting ring; Realized the accurate sensing of read head to the annulus grating; Thereby obtain the accurate angle of swing of beam barrel, and realize the highi degree of accuracy rotation, reach purpose the highi degree of accuracy Spin Control of weight workpiece through rotating driving device control air supporting axle sleeve.
Description of drawings
Fig. 1 is the three-dimensional erection drawing of air supporting support according to the invention, read head and reading support;
Fig. 2 is the three-dimensional erection drawing of air supporting axle sleeve according to the invention, annulus grating and grating connecting ring;
Fig. 3 is the plan view of air supporting assembly according to the invention;
Fig. 4 is the A-A sectional view among Fig. 3.
Embodiment
Below in conjunction with accompanying drawing the present invention is made further specific descriptions:
Like Fig. 1, Fig. 2, Fig. 3 and shown in Figure 4; The present invention includes air supporting support, reading support 2, read head 1, air supporting axle sleeve, grating connecting ring 8 and annulus grating 7; Said air-bearing shafts cover is set on the said air supporting support; Said air supporting support comprises the bearing 5 of founding tube 3 and being arranged at the bottom of upright tube 3, and reading support 2 is installed on upright 3 upper end, and read head 1 is installed on the reading support 2; Said air supporting axle sleeve comprises base 10 and is arranged at the beam barrel 9 on the base 10; Grating connecting ring 8 is installed on the upper end of beam barrel 9; Annulus grating 7 is installed on the upper end of grating connecting ring 8, evenly is provided with a plurality of above-below directions and corresponding each other unthreaded hole on the grating connecting ring 8 with on the annulus grating 7; The position of the unthreaded hole on the position of read head 1 and the annulus grating 7 is corresponding; Beam barrel 9 is set in outside the upright tube 3, and base 10 places on the bearing 5; The air outlet hole 4 that is interlinked to the outside in the barrel of the end face of bearing 5 and upright tube 3 is provided with, the inlet hole 6 that is interlinked to the outside in bearing 5 is provided with, air outlet hole 4 communicates with inlet hole 6; Read head 1 is active photoreceptor.
As shown in Figure 1, air outlet hole 4 is a plurality of, and on the barrel of end face that is uniformly distributed in bearing 5 and upright tube 3, inlet hole 6 is for a plurality of and be distributed in the side of bearing 5; The plan view profile of bearing 5 can be symmetric shape such as circular, square.
In conjunction with Fig. 1, air outlet hole 4 has two kinds with the structure that communicates between the inlet hole 6:
One of which, all air outlet holes 4 all communicate with inlet hole 6; Its two, each inlet hole 6 is an air-flow path with a plurality of air outlet holes 4, the inlet hole 6 in the same air-flow path communicates with air outlet hole 4.These two kinds of structures all can realize same function, select suitable structure according to the air pressure of the high pressure constant pressure air feeding device (not shown) that air pressure is provided for inlet hole 6 in the application.
Like Fig. 3 and shown in Figure 4; Between the inwall of the outer wall of the upright tube 3 of air supporting support and the beam barrel 9 of air supporting axle sleeve, above the bearing 5 of air supporting support below the base 10 of air supporting axle sleeve between cavity of formation jointly; The space of this cavity is minimum; Generally less than one millimeter, in addition little of tens microns, so also not shown among the figure.
In the application, the heavy workpiece (not shown) is installed in air-bearing shafts and puts, and inlet hole 6 is connected with the steam outlet pipe of high pressure constant pressure air feeding device (not shown); The signal output part of read head 1 is connected with the induced signal input end of central control unit (not shown).Pressurized gas get into from inlet hole 6; From upright 3 the circumferential outer surface of this air supporting support and the upper surface ejection of bearing 5; In above-mentioned cavity, form the air film (not shown) that one deck has rigidity, this gas mould provides support force upwards to the air supporting axle sleeve, and axial binding force; Can make the air supporting axle sleeve carry large and heavy objects; Can realize that again the air supporting axle sleeve rotates with respect to the no friction of air supporting support or friction, and make the air supporting axle sleeve off-centre that can not rotate, keep by the bearing material smooth rotation.
Read head 1 is installed on the upright tube 3 through reading support 2, remains static; Annulus grating 7 is installed on the beam barrel 9 through grating connecting ring 8, is in the state of rotatablely moving.Owing on the annulus grating 7 equally distributed unthreaded hole is arranged; So read head 1 can be sensed the position of unthreaded hole, read the light pulse number that passes, form pulse signal; And this signal is transferred to central control unit; Central control unit goes out the accurate angle of swing of beam barrel 9 according to this calculated signals, and controls the air supporting axle sleeve through the rotating driving device (not shown) and realize the highi degree of accuracy rotation, thereby reaches the purpose to the highi degree of accuracy Spin Control of weight workpiece.

Claims (6)

1. a large-scale precision turntable air supporting assembly is characterized in that: comprise the air supporting support and be set in the air supporting axle sleeve on this air supporting support that said air supporting support comprises upright tube and is arranged at the bearing of upright tube bottom; Said air supporting axle sleeve comprises base and is arranged at the beam barrel on the base; Said beam barrel is set in outside the said upright tube, and said base places on the said bearing; The air outlet hole that is interlinked to the outside in the barrel of the end face of said bearing and said upright tube is provided with, the inlet hole that is interlinked to the outside in said bearing is provided with, said air outlet hole and said inlet hole communicate.
2. large-scale precision turntable air supporting assembly according to claim 1, it is characterized in that: said air outlet hole is a plurality of, is uniformly distributed on the barrel of end face and said upright tube of said bearing, said inlet hole is a plurality of and is distributed in the side of said bearing.
3. large-scale precision turntable air supporting assembly according to claim 2 is characterized in that: all said air outlet hole and said inlet holes all communicate.
4. large-scale precision turntable air supporting assembly according to claim 2 is characterized in that: each said inlet hole and a plurality of said air outlet hole are an air-flow path, and inlet hole and air outlet hole in the same air-flow path communicate.
5. large-scale precision turntable air supporting assembly according to claim 1; It is characterized in that: said air supporting assembly also comprises grating connecting ring, annulus grating, reading support and read head; Said grating connecting ring is installed on the upper end of said beam barrel; Said annulus grating is installed on the upper end of said grating connecting ring, evenly is provided with a plurality of above-below directions and corresponding each other unthreaded hole on the said grating connecting ring with on the said annulus grating; Said reading support is installed on the upper end of said upright tube, and said read head is installed on the said reading support, and the position of the unthreaded hole on the position of said read head and the said annulus grating is corresponding.
6. large-scale precision turntable air supporting assembly according to claim 5, it is characterized in that: said read head is active photoreceptor.
CN2012103212807A 2012-09-03 2012-09-03 Air flotation assembly for large-scale precise rotary table Pending CN102817915A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103047288A (en) * 2012-12-31 2013-04-17 浙江工业大学 Rotary air supply device free from air pipe curve disturbance
CN104533956A (en) * 2015-01-22 2015-04-22 哈尔滨工业大学 Active compensation type low-swirl shaft-driven air bearing
CN110067811A (en) * 2019-05-30 2019-07-30 中国工程物理研究院机械制造工艺研究所 A kind of air-float turntable
CN111322312A (en) * 2020-04-02 2020-06-23 苏州智润精工科技有限公司 Aerostatic guideway and control method thereof

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007057069A (en) * 2005-08-26 2007-03-08 Ntn Corp Aerostatic gas journal bearing spindle device
CN202132391U (en) * 2011-06-15 2012-02-01 深圳市兴旺达科技有限公司 Air suspension shaft sleeve
TW201224310A (en) * 2010-12-01 2012-06-16 Prec Machinery Res & Amp Dev Ct Gas bearing device
CN203098574U (en) * 2012-09-03 2013-07-31 中国工程物理研究院总体工程研究所 Large precise rotary table air floatation component

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007057069A (en) * 2005-08-26 2007-03-08 Ntn Corp Aerostatic gas journal bearing spindle device
TW201224310A (en) * 2010-12-01 2012-06-16 Prec Machinery Res & Amp Dev Ct Gas bearing device
CN202132391U (en) * 2011-06-15 2012-02-01 深圳市兴旺达科技有限公司 Air suspension shaft sleeve
CN203098574U (en) * 2012-09-03 2013-07-31 中国工程物理研究院总体工程研究所 Large precise rotary table air floatation component

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103047288A (en) * 2012-12-31 2013-04-17 浙江工业大学 Rotary air supply device free from air pipe curve disturbance
CN103047288B (en) * 2012-12-31 2015-02-18 浙江工业大学 Rotary air supply device free from air pipe curve disturbance
CN104533956A (en) * 2015-01-22 2015-04-22 哈尔滨工业大学 Active compensation type low-swirl shaft-driven air bearing
CN110067811A (en) * 2019-05-30 2019-07-30 中国工程物理研究院机械制造工艺研究所 A kind of air-float turntable
CN110067811B (en) * 2019-05-30 2024-03-26 中国工程物理研究院机械制造工艺研究所 Air-floating rotary table
CN111322312A (en) * 2020-04-02 2020-06-23 苏州智润精工科技有限公司 Aerostatic guideway and control method thereof

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Application publication date: 20121212