CN108557117B - Non-contact air supply device and method of air-floatation physical simulation platform with air film sealing - Google Patents
Non-contact air supply device and method of air-floatation physical simulation platform with air film sealing Download PDFInfo
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- CN108557117B CN108557117B CN201810202223.4A CN201810202223A CN108557117B CN 108557117 B CN108557117 B CN 108557117B CN 201810202223 A CN201810202223 A CN 201810202223A CN 108557117 B CN108557117 B CN 108557117B
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- 238000004088 simulation Methods 0.000 title claims abstract description 54
- 238000000034 method Methods 0.000 title claims abstract description 13
- 238000007789 sealing Methods 0.000 title claims abstract description 9
- 238000007667 floating Methods 0.000 claims abstract description 59
- 238000013519 translation Methods 0.000 claims description 13
- 238000003754 machining Methods 0.000 claims description 9
- 238000009423 ventilation Methods 0.000 claims description 6
- 238000012545 processing Methods 0.000 claims description 3
- 239000000725 suspension Substances 0.000 description 8
- 230000005291 magnetic effect Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005347 demagnetization Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003302 ferromagnetic material Substances 0.000 description 1
- 238000005188 flotation Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64G—COSMONAUTICS; VEHICLES OR EQUIPMENT THEREFOR
- B64G7/00—Simulating cosmonautic conditions, e.g. for conditioning crews
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Abstract
The invention discloses a non-contact air supply device and a non-contact air supply method for an air film sealed air-floating physical simulation platform. The invention not only realizes the non-contact air film sealing between the air supply of the air-floating physical simulation platform and the external ground environment, but also can obtain continuous air supply, and has the advantages of infinite experimental time in theory, small simulated environment interference torque and the like.
Description
Technical Field
The invention belongs to the field of spacecraft physical simulation, and mainly relates to a non-contact gas supply device and a non-contact gas supply method for an air-floatation physical simulation platform with a sealed gas film.
Background
With the rapid development of the aerospace technology, the use of the spacecraft is continuously increased, and the requirements on the rapid maneuvering performance, the attitude and orbit stability performance and the reliability performance of the spacecraft are increasingly improved. In order to verify and ensure the on-orbit motion performance of the spacecraft, it becomes important to perform a ground simulation experiment for simulating the space environment of weightlessness and micro-interference moment.
The structural form of the ground simulation platform of the existing spacecraft is in a form of lead screw guide rail contact, air suspension non-contact, magnetic suspension non-contact and the like. The friction torque of the screw guide rail type simulation platform is large, and the environmental requirement of micro interference torque is difficult to meet. Patent CN101286281A proposes a rigid-elastic-liquid coupled spacecraft physical simulation experiment system, which realizes multi-degree-of-freedom motion through magnetic suspension to obtain a rigid-elastic-liquid coupled multi-body spacecraft system close to reality. However, the magnetic suspension mode can generate large magnetic field interference, so that a non-negligible magnetic moment is generated, and the ferromagnetic material has a demagnetization risk. Therefore, the air suspension type physical simulation platform is the mainstream equipment of the spacecraft full physical simulation test system. Patents CN106494653A, CN105242573A, and CN105179478A all adopt an air suspension form, and the suspension of the platform is realized through an air bearing, so as to simulate the dynamic characteristics of the satellite in an orbit micro-disturbance torque state. In patent CN105321398A, a six-degree-of-freedom air-floating motion simulation system is proposed, which realizes six-degree-of-freedom motion of a platform through a spherical air-floating bearing and three planar air-floating bearings, and completes the rotation and translation motion simulation of the space attitude of a spacecraft. In the air suspension physical simulation platform mentioned in the above patent, air cylinders are placed on the attitude platform and the translation platform, and the air bearing is supplied with air by combining a pressure reducing valve and a stable air volume through the serial connection of the air cylinders. However, the air supply mode through the air bottle can bring the problems of limited experimental time, change of the quality of the moving platform along with time and the like, and the air supply mode through the external air pipe to the air floating platform can bring the traction effect of the air supply pipe and large interference torque.
Disclosure of Invention
In order to solve the defects in the prior art, the invention provides a non-contact air supply device and a non-contact air supply method for an air-film sealed air-floating physical simulation platform.
The purpose of the invention is realized by the following technical scheme: a non-contact air supply method for air-film sealed air-floating physical simulation platform is characterized in that an air guide unit consisting of an air guide block and an air guide hole is arranged at the center of the vertical lower part of the translation platform of the air-floating physical simulation platform, the air guide hole is positioned at the center of the air guide block, an air supply unit fixed on a basic platform is correspondingly arranged below the air guide unit, an air supply hole is arranged at the center of the air supply unit, and a large-area shallow cavity is arranged around the air supply hole, so that when the air-floating physical simulation platform moves in a plane, the air supply hole is always positioned in the range of the shallow cavity, the air guide unit is correspondingly arranged with the fine machining surface of the air supply unit, the distance of several micrometers is kept, and in the air supply process of the air-floating physical simulation platform, non-contact air-film sealing is.
The invention also provides a non-contact air supply device of the air-floatation physical simulation platform sealed by the air film, which comprises a rotary platform, a support upright post, a translation platform, a base platform, an air-floatation ball bearing, an air-floatation ball bowl and an instrument platform arranged below the rotary platform through a support cylinder, wherein the air-floatation ball bearing assembly consisting of the air-floatation ball bearing and the air-floatation ball bowl is used for realizing the rotation of the rotary platform and the instrument platform in the Rx (Rx) direction, the Ry (Rz) direction and the Rz (Rz) direction; the air-floating ball bearing is fixedly arranged below the rotary platform, the support upright post is fixedly arranged above the translational platform, the upper end of the support upright post is fixedly connected with an air-floating ball bowl, the center of the support upright post is provided with an air vent and a lateral air vent pipeline, the translational platform realizes X-direction and Y-direction plane non-contact motion of the air-floating physical simulation platform through uniformly distributed plane thrust air-floating bearings, an air guide unit consisting of an air guide block and an air guide hole is arranged at the central position of the installation side of the translational platform and the plane thrust air-floating bearings, the air guide hole is communicated with the air vent at the center of the support upright post, air is supplied to the air-floating ball bearing assembly along the + z direction of the support upright post by virtue of the air vent at the center of; the lower bottom surface of the basic platform is provided with an air supply unit corresponding to the-z direction of the air guide unit, the air supply unit consists of an air supply block, an air supply hole and a large-area shallow cavity, the air supply hole is arranged in the center of the air guide block, the large-area shallow cavity is arranged around the air supply hole, and the air guide hole is always positioned in the large-area shallow cavity when the air-floatation physical simulation platform moves; the corresponding surfaces of the air guide block and the air supply block are subjected to fine processing, and the distance of micron order is kept; and in the process of supplying air to the air-floatation physical simulation platform, non-contact air film sealing for supplying air is performed through the air guide block and the finish machining surface corresponding to the air supply block.
Preferably, the air guide unit adopts a finishing mode such as grinding and the like to obtain a high-flatness working surface on the non-shallow cavity surface on the side corresponding to the air supply unit.
Preferably, the large-area shallow cavity can be arranged on the air supply block and also can be arranged on the air guide block.
Preferably, three or more plane thrust air-float bearings are uniformly arranged in the circumferential direction below the translation platform.
Preferably, the plane thrust air bearing may be in the form of an annular plane thrust small hole throttling air bearing, a porous air bearing or other plane thrust air bearings, and is not limited to the above-mentioned plane thrust air bearing.
Preferably, the air-floating ball assembly and the plane thrust air-floating bearing in the air-floating physical simulation platform can independently supply air at different air supply pressures by respectively additionally arranging pressure reducing valves in the supporting upright post and the lateral ventilation pipeline, and can also simultaneously supply air to the air-floating ball assembly and the plane thrust air-floating bearing at the same air supply pressure.
Compared with the prior art, the invention has the following beneficial effects:
1. the experimental time limit brought by the capacity of the compressed air bottle is broken through. According to the invention, through the relative arrangement of the air guide unit fixed on the motion platform and the air supply unit fixed on the base platform, the air floating ball bearing and the plane thrust air floating bearing in the air floating physical simulation platform can be continuously supplied with air, so that the experimental test duration of the air floating physical simulation platform is not influenced by the capacity of an air cylinder in the traditional physical simulation platform.
2. And non-contact air supply to the air floatation physical simulation platform is realized. The air floating physical simulation platform has the advantages that the corresponding finish machining surface between the air supply unit and the air guide unit in the air floating physical simulation platform is always kept in a non-contact state from several micrometers to ten micrometers, so that air film sealing for supplying air can be realized, compared with a platform structure in which an air pipe is connected with an air supply mode, due to the connection of the external air supply pipe, the traction effect and large interference torque of the air pipe are brought, so that accurate micro torque simulation under the space environment cannot be obtained, and the influence of the air supply pipe on the platform movement is completely eliminated through non-contact air supply.
Drawings
Fig. 1 is a schematic diagram of the overall structure of the embodiment of the present invention.
Figure 2 is a partial cross-sectional view of the non-contact gas supply of the present invention.
In the figure: 1-rotating the platform; 2, supporting the cylinder; 3-instrument platform; 4, supporting the upright post; 5-lateral ventilation pipeline; 6-translation platform; 7-plane thrust air bearing; 8-a gas supply unit; 8 a-a gas supply block; 8 b-air supply hole; 8 c-large area shallow cavity; 9-an air guide unit; 9 a-an air guide block; 9 b-gas vent; 10-a base platform; 11-an air-float ball bowl; 12-air ball bearing.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that variations and modifications can be made by persons skilled in the art without departing from the spirit of the invention. All falling within the scope of the present invention.
A non-contact air supply method for air-film sealed air-floating physical simulation platform is characterized in that an air guide unit consisting of an air guide block and an air guide hole is arranged at the center of the vertical lower part of the translation platform of the air-floating physical simulation platform, the air guide hole is positioned at the center of the air guide block, an air supply unit fixed on a basic platform is correspondingly arranged below the air guide unit, an air supply hole is arranged at the center of the air supply unit, and a large-area shallow cavity is arranged around the air supply hole, so that when the air-floating physical simulation platform moves in a plane, the air supply hole is always positioned in the range of the shallow cavity, the air guide unit is correspondingly arranged with the fine machining surface of the air supply unit, the distance of several micrometers is kept, and in the air supply process of the air-floating physical simulation platform, non-contact air-film sealing is.
As shown in fig. 1-2, an embodiment of the present invention further provides a non-contact air supply device for an air-film sealed air-floating physical simulation platform, which includes a rotary platform 1, a support column 4, a translation platform 6, a base platform 10, an air-floating ball bearing 12, a floating ball bowl 11, an instrument platform 3 installed below the rotary platform 1 through a support cylinder 2, and an air-floating ball bearing assembly composed of the air-floating ball bearing 12 and the air-floating ball bowl 11, and is configured to implement Rx, Ry, and Rz-directional rotation of the rotary platform 1 and the instrument platform 3; the air-float ball bearing 12 is fixedly arranged below the rotary platform 1, the supporting upright post 4 is fixedly arranged above the translation platform 6, the upper end of the horizontal moving platform is fixedly connected with an air-float ball bowl 11, the center of a supporting upright post 4 is provided with an air vent and a lateral air vent pipeline 5, the horizontal moving platform 6 realizes the X-direction and Y-direction plane non-contact movement of the air-float physical simulation platform through a plane thrust air-float bearing 7 which is uniformly distributed, an air guide unit 9 consisting of an air guide block 9a and an air guide hole 9b is arranged at the central position of the installation side of the translational platform 6 and the plane thrust air-float bearing 7, the air guide hole 9b is communicated with an air vent at the center of the supporting upright post 4, the air is supplied to the air-float ball bearing assembly along the + z direction of the supporting upright post 4 by virtue of the air vent at the center of the supporting upright post 4, the lateral ventilation pipeline 5 is connected with the plane thrust air-float bearing 7 and is used for supplying air to the plane thrust air-float bearing 7; an air supply unit 8 is arranged at the position, corresponding to the-z direction, of the lower bottom surface of the basic platform 10 and the air guide unit 9, the air supply unit 8 is composed of an air supply block 8a, an air supply hole 8b and a large-area shallow cavity 8c, the air supply hole 8b is arranged in the center of the air guide block 8a, the large-area shallow cavity 8c is formed in the periphery of the air supply hole 8b, and when the air-floatation physical simulation platform moves, the air guide hole 9b is always located in the large-area shallow cavity 8 c; the corresponding surfaces of the air guide block 9a and the air supply block 8a are subjected to fine processing, and the distance of micron order is kept; in the air supply process of the air-flotation physical simulation platform, non-contact air film sealing for air supply is carried out on the finish machining surfaces corresponding to the air guide blocks 9a and the air supply blocks 8 a.
The air guide unit 9 obtains a high-flatness working surface by adopting finish machining modes such as grinding and the like on a non-shallow cavity surface on the side corresponding to the air supply unit 8, and the large-area shallow cavity can be arranged on the air supply block 8a and also can be arranged on the air guide block 9 a. Three or more plane thrust air-float bearings 7 are uniformly arranged in the circumferential direction below the translation platform 6. The plane thrust air bearing 7 may be an annular plane thrust small hole throttling air bearing, a porous air bearing or other plane thrust air bearing, and is not limited to the above plane thrust air bearing. The air-floating ball assembly and the plane thrust air-floating bearing 7 in the air-floating physical simulation platform can independently supply air at different air supply pressures by respectively adding pressure reducing valves in the supporting upright posts 4 and the lateral ventilation pipelines 5, and can also simultaneously supply air to the air-floating ball assembly and the plane thrust air-floating bearing 7 at the same air supply pressure.
The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes and modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention.
Claims (7)
1. The non-contact air supply method of the air-floatation physical simulation platform with the sealed air film is characterized in that: the air guide unit is characterized in that an air guide block and an air guide hole are arranged at the center of a translation platform of the air-floatation physical simulation platform in a vertical direction, the air guide hole is positioned at the center of the air guide block, an air supply unit fixed on the basic platform is correspondingly arranged below the air guide unit, an air supply hole is arranged at the center of the air supply unit, and a large-area shallow cavity is formed around the air supply hole, so that when the air-floatation physical simulation platform moves in a plane, the air supply hole is always positioned in the range of the shallow cavity, the air guide unit is correspondingly arranged with a finish machining surface of the air supply unit, and the distance of the order of several micrometers is kept.
2. The non-contact air supply device of the air-float physical simulation platform sealed by the air film is characterized in that: the device comprises a rotary platform (1), a support upright post (4), a translation platform (6), a base platform (10), an air-floating ball bearing (12), a floating ball bowl (11) and an instrument platform (3) which is arranged below the rotary platform (1) through a support cylinder (2), wherein an air-floating ball bearing assembly consisting of the air-floating ball bearing (12) and the air-floating ball bowl (11) is used for realizing Rx, Ry and Rz-direction rotation of the rotary platform (1) and the instrument platform (3); the air-floating ball bearing (12) is fixedly arranged below the rotary platform (1), the supporting upright post (4) is fixedly arranged above the translational platform (6), the upper end of the supporting upright post is fixedly connected with an air-floating ball bowl (11), the center of the supporting upright post (4) is provided with an air vent and a lateral air vent pipeline (5), the translational platform (6) realizes the X-direction and Y-direction plane non-contact movement of the air-floating physical simulation platform through uniformly distributed plane thrust air-floating bearings (7), an air guide unit (9) consisting of an air guide block (9a) and an air guide hole (9b) is arranged at the central position of the mounting sides of the translational platform (6) and the plane thrust air-floating bearings (7), the air guide hole (9b) is communicated with the air vent at the center of the supporting upright post (4), and the air-floating ball bearing assembly is supplied with air along the directions of the supporting upright post (4) +, the lateral ventilation pipeline (5) is connected with the plane thrust air-floatation bearing (7) and is used for supplying air to the plane thrust air-floatation bearing (7); an air supply unit (8) is arranged at the position, corresponding to the-z direction, of the lower bottom surface of the basic platform (10) and the air guide unit (9), the air supply unit (8) is composed of an air supply block (8a), an air supply hole (8b) and a large-area shallow cavity (8c), the air supply hole (8b) is arranged in the center of the air guide block (8a), the large-area shallow cavity (8c) is formed in the periphery of the air supply hole (8b), and when the air floatation physical simulation platform moves, the air guide hole (9b) is always located in the large-area shallow cavity (8 c); the corresponding surfaces of the air guide block (9a) and the air supply block (8a) are subjected to fine processing, and the distance of micron order is kept; in the air supply process of the air-floatation physical simulation platform, non-contact air film sealing for air supply is carried out on the finish machining surfaces corresponding to the air guide blocks (9a) and the air supply blocks (8 a).
3. The non-contact gas supply device of the air film sealed air-floating physical simulation platform according to claim 2, wherein: the air guide unit (9) adopts a finish machining mode to obtain a high-flatness working surface on the non-shallow cavity surface of the side corresponding to the air supply unit (8).
4. The non-contact gas supply device of the air film sealed air-floating physical simulation platform according to claim 2, wherein: the large-area shallow cavity is arranged on the air supply block (8a) or the air guide block (9 a).
5. The non-contact gas supply device of the air film sealed air-floating physical simulation platform according to claim 2, wherein: the number of the plane thrust air-float bearings (7) uniformly arranged in the circumferential direction below the translation platform (6) is more than or equal to three.
6. The non-contact gas supply device of the air film sealed air-floating physical simulation platform according to claim 2, wherein: the plane thrust air-float bearing (7) can adopt any one of the following plane thrust air-float bearing forms: -an annular planar thrust aperture throttle air bearing; -a porous air bearing.
7. The non-contact gas supply device of the air film sealed air-floating physical simulation platform according to claim 2, wherein: the air floatation ball assembly and the plane thrust air floatation bearing (7) in the air floatation physical simulation platform adopt any one of the following air supply modes: -separate supply of air at different supply pressures by adding pressure reducing valves in the support uprights (4) and in the lateral ventilation ducts (5), respectively; -simultaneously supplying air to the air ball assembly and the plane thrust air bearing (7) at the same air supply pressure.
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| CN112027124B (en) * | 2020-07-30 | 2022-04-12 | 北京卫星制造厂有限公司 | Large-bearing high-clearance air floatation supporting device |
| CN113406887B (en) * | 2021-06-25 | 2022-02-22 | 日照坤仑智能科技有限公司 | Self-adaptive six-degree-of-freedom air floatation simulation test bed and calculation method thereof |
| CN115783318B (en) * | 2022-12-05 | 2025-07-22 | 之江实验室 | Air bearing table, control method and device thereof, storage medium and electronic equipment |
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| CN107228127A (en) * | 2017-07-21 | 2017-10-03 | 天津航天机电设备研究所 | A kind of air-bearing |
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2018
- 2018-03-12 CN CN201810202223.4A patent/CN108557117B/en active Active
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| US5683060A (en) * | 1995-06-09 | 1997-11-04 | Iturralde; Miguel A. | Air vehicle |
| CN101551301A (en) * | 2009-04-24 | 2009-10-07 | 哈尔滨工业大学 | Satellite orbit motion ground simulation system and simulation method thereof |
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