CN102589801B - Air flotation loading test device with jet type guide keys - Google Patents
Air flotation loading test device with jet type guide keys Download PDFInfo
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- CN102589801B CN102589801B CN201210043453.3A CN201210043453A CN102589801B CN 102589801 B CN102589801 B CN 102589801B CN 201210043453 A CN201210043453 A CN 201210043453A CN 102589801 B CN102589801 B CN 102589801B
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- 238000005188 flotation Methods 0.000 title claims abstract description 5
- 238000007667 floating Methods 0.000 claims abstract description 4
- 239000007787 solid Substances 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 3
- 230000003068 static effect Effects 0.000 abstract description 3
- 210000003746 feather Anatomy 0.000 description 18
- 239000000725 suspension Substances 0.000 description 5
- 230000007246 mechanism Effects 0.000 description 4
- 238000002474 experimental method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000000691 measurement method Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 1
- 238000012938 design process Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
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- Aerodynamic Tests, Hydrodynamic Tests, Wind Tunnels, And Water Tanks (AREA)
Abstract
本发明涉及具有喷气式导向键的气浮加载实验装置。包括直立状的支架，支架的下部和上部分别安装有底座的套筒；套筒内设有轴；轴的轴向开设有盲孔，盲孔内设有二块以上的加重块；轴的外侧壁上沿轴向开设有键槽，与键槽对应的套筒中部径向上开设有安装孔，安装孔内设有管状的气浮导向键；套筒内筒壁的上端和下端分别开设有台阶孔，上端、下端的台阶孔内分别设有气浮轴承，气浮轴承的外圆周上开设有环槽，环槽内均布开设有两个以上的进气小孔，与环形槽对应的套筒上设有进气口；套筒径向上还设有排气孔。本发明加载轴完全被气体支承，当处于受力平衡状态时，轴与套筒以及导向键之间不存在固体接触，因而不存在静摩擦力，从而保证加载过程中无摩擦力产生的误差。
The invention relates to an air-floating loading experimental device with an air-jet guide key. It includes an upright bracket, the lower part and upper part of the bracket are respectively equipped with a base sleeve; the sleeve is provided with a shaft; the axial direction of the shaft is provided with a blind hole, and more than two weight blocks are arranged in the blind hole; the outer side of the shaft The wall is provided with a keyway in the axial direction, and the middle part of the sleeve corresponding to the keyway is provided with a mounting hole in the radial direction, and a tubular air flotation guide key is provided in the mounting hole; the upper end and the lower end of the inner wall of the sleeve are respectively provided with stepped holes. There are air bearings in the stepped holes at the upper end and the lower end respectively, and ring grooves are opened on the outer circumference of the air bearings, and more than two small air intake holes are evenly distributed in the ring grooves, and on the sleeve corresponding to the ring grooves An air inlet is provided; an exhaust hole is also arranged radially on the sleeve. The loading shaft of the present invention is fully supported by gas, and when in a force-balanced state, there is no solid contact between the shaft, the sleeve and the guide key, so there is no static friction force, thereby ensuring no error caused by friction force during the loading process.
Description
Technical field
The invention belongs to loading experimental apparatus technical field, be specifically related to a kind of air supporting loading experimental apparatus.
Background technology
The patent No. is to disclose a kind of air-flotation type multidimensional force measurement method in 200810019550.2 " air-floating type multidimensional sensor and multidimensional force measurement method ", its principle is with 16 air supporting nozzles, kickboard to be floated completely, by measuring the gaseous tension of privileged site in air supporting nozzle, converse the buoyancy that nozzle is subject to, and then calculate the acting force being subject in kickboard.In to the performance study of above-mentioned air-floating type multidimensional sensor and design process, need to understand the corresponding relation between acting force in the gaseous tension of measured point in nozzle-kickboard mechanism that air supporting nozzle and kickboard form and kickboard, therefore need to design a kind of loading experimental apparatus carries out experiment.
The simple air supporting loading experimental apparatus of use was as shown in Figure 7 in the past: wherein, the 01st, sleeve, the 02nd, weight, the 03rd, axle, the 04th, tested air supporting nozzle, the 05th, base, the 06th, screw, the 07th, support, the 08th, screw.Sleeve 01 connects firmly by screw 06 and support 07, support 07 connects firmly by screw 08 and base, axle 03 is placed in sleeve 01 with the form of clearance fit, axle 03 is lower end closed, the open hollow structure in upper end, weight 02 can be put into the hollow cavity of axle 03, the lower surface of axle 03 is vertical with axis, and the axis of axle 03 is adjusted into plumb position; Tested air supporting nozzle 04 is placed on base 05, and the position of adjusting tested air supporting nozzle 04 is located under axle 03 lower end and makes nozzle face maintenance level.During experiment, in tested air supporting nozzle 04, access the pressure gas with certain pressure, the gas of tested air supporting nozzle 04 ejection floats axle 03, and tested air supporting nozzle 04 forms nozzle-kickboard mechanism with the lower surface of axle 03; In the hollow cavity of axle 03, add the known weight of weight 02 can measure the gaseous tension of privileged site in corresponding tested air supporting nozzle 04, constantly change the quantity of the weight adding, can obtain the corresponding relation between acting force in the gaseous tension of measured point in tested air supporting nozzle 04 and axle 03 lower surface formed nozzle-kickboard mechanism and kickboard.In above-mentioned air supporting loading experimental apparatus, between axle 03 and sleeve 01, exist solid to contact, at axle 03, in stress balance state and when static, solid contact position exists static friction, thereby makes in loading procedure to have error, loading accuracy is not high.
Summary of the invention
The not high problem of loading accuracy existing in order to solve above-mentioned air supporting loading experimental apparatus, the present invention provides a kind of air supporting loading experimental apparatus with jet-propelled feather key by architecture advances.
It is as follows that concrete structure of the present invention improves technical scheme:
The air supporting loading experimental apparatus with jet-propelled feather key comprises the support 7 of vertical, and the bottom of described support 7 is provided with base 5, and support 7 tops corresponding with base are provided with sleeve 1; The axial perforation of described sleeve 1, and corresponding with base, in sleeve 1, be provided with axle 3; The axial middle part of described axle 3 offers blind hole, is provided with two above weights 2 in blind hole; The lateral wall middle part of described axle 3 offers keyway 10 vertically, the sleeve 1 middle part footpath corresponding with keyway 10 upwards offers mounting hole, in mounting hole, be provided with the air supporting feather key 9 of tubulose, described air supporting feather key 9 is the tubulose of inner sealing, and its inner is positioned at the keyway 10 of axle; The top and bottom of described sleeve 1 inner tube wall are respectively equipped with the stepped hole that diameter is larger, in the stepped hole of described sleeve 1 upper end, interference fit is provided with air-bearing 11, on the excircle of upper air-bearing 11, offer ring groove 13, the interior uniform plural upper air aperture 12 that offers of the upper ring groove 13 corresponding with axle 3, the sleeve 1 corresponding with upper ring groove 13 is provided with enterprising gas port 14; In the stepped hole of described sleeve 1 lower end, interference fit is provided with lower air-bearing 17, on the excircle of lower air-bearing 17, offer lower ring groove 19, the interior uniform plural lower small air inlet hole 18 that offers of the lower ring groove 19 corresponding with axle 3, the sleeve 1 corresponding with lower ring groove 19 is provided with lower air intake opening 20; On described sleeve 1, offer vent port 21.
On the inner of described air supporting feather key 9, offer the small through hole 16 radially connecting.
The present invention adopts the jet supporting structure of upper and lower air-bearing that loading axle is radially supported, and adopts the structure of the jet supporting of being healthy and strong that pressurized air is introduced to form air supporting in two side clearances of feather key and keyway and lead.Air supporting guiding has been eliminated and has been loaded axle owing to producing the possibility of freely rotating around self axis in air supporting state completely, and loading axle can only be without frictionally moving vertically.Good effect of the present invention is: load axle and by gas, supported completely, when loading axle in stress balance state, between axle and bearing and feather key, do not exist solid to contact, thereby do not have stiction, thereby guarantee the error that in loading procedure, zerofriction force produces.
Accompanying drawing explanation
Fig. 1 is structural front view of the present invention.
Fig. 2 is the A-A cut-open view of Fig. 1.
Fig. 3 is the partial enlarged drawing in Fig. 1.
Fig. 4 is the B-B cut-open view of Fig. 3.
Fig. 5 is the C-C cut-open view of Fig. 1.
Fig. 6 is the D-D cut-open view of Fig. 1.
Fig. 7 is existing air supporting loading experimental apparatus structural representation.
Sequence number in upper figure: sleeve 1, weight 2, axle 3, tested air supporting nozzle 4, base 5, screw 6, support 7, air supporting feather key 9, keyway 10, upper air-bearing 11, upper air aperture 12, upper ring groove 13, enterprising gas port 14, feather key air admission hole 15, small through hole 16, lower air-bearing 17, lower small air inlet hole 18, lower ring groove 19, lower air intake opening 20, vent port 21.
Embodiment
Below in conjunction with accompanying drawing, by embodiment, the present invention is further described.
Embodiment:
Referring to Fig. 1 and Fig. 2, the air supporting loading experimental apparatus with jet-propelled feather key comprises the support 7 of vertical, and the bottom of support 7 is provided with base 5 by screw 6, by screw, sleeve 1 is installed with the top of the corresponding support 7 of base 5.The axial perforation of sleeve 1, and corresponding with base, is provided with axle 3 in sleeve 1, axle 3 axially offer blind hole, in blind hole, be provided with polylith weight 2.On the outer wall of axle 3, offer vertically keyway 10, the sleeve 1 middle part footpath corresponding with keyway 10 upwards offers mounting hole, the air supporting feather key 9 of the tubulose that inner end seals closes is housed in mounting hole, the inner of air supporting feather key 9 is positioned at the keyway 10 of axle, on the inner of air supporting feather key 9, offer the small through hole 16 radially connecting, see Fig. 3 and Fig. 4.The top and bottom of sleeve 1 inner tube wall offer respectively stepped hole, mode with interference fit in the stepped hole of sleeve 1 upper end is provided with upper air-bearing 11, on the excircle of upper air-bearing 11, offer ring groove 13, interior uniform four the upper air apertures 12 that offer of the upper ring groove 13 corresponding with axle 3, offer enterprising gas port 14 on the sleeve 1 corresponding with upper ring groove 13; See Fig. 5.Mode with interference fit in the stepped hole of sleeve 1 lower end is provided with lower air-bearing 17, on the excircle of lower air-bearing 17, offer lower ring groove 19, interior uniform four the lower small air inlet holes 18 that offer of the lower ring groove 19 corresponding with axle 3, offer lower air intake opening 20 on the sleeve 1 corresponding with lower ring groove 19; See Fig. 6.On sleeve 1, offer vent port 21, see Fig. 1.
During experiment, first, tested air supporting nozzle 4 is placed on the base 5 under axle 3, during installation, keeps the end face of tested air supporting nozzle 4 parallel with the lower surface of axle 3.Upwards air intake opening 14, lower air intake opening 20, feather key air admission hole 15 and tested air supporting nozzle 4 are supplied with the gas of certain pressures respectively.Pressure gas enters upper ring groove 13 through enterprising gas port 14, by 4 uniform upper air apertures 12, enter the gap between axle 3 and upper air-bearing 11 and flow out from the two ends of upper air-bearing 11 again, one end effluent air directly enters atmosphere, gap between other end effluent air warp beam 3 and sleeve enters atmosphere by vent port 21, air-flow between axle 3 and upper air-bearing 11 forms supporting air film, and upper air-bearing 11 forms radially gas suspension by air film to axle 3; Pressure gas enters lower ring groove 19 through lower air intake opening 20, by 4 uniform lower small air inlet holes 18, enter the gap between axle 3 and lower air-bearing 17 and flow out from the two ends of lower air-bearing 17 again, one end effluent air directly enters atmosphere, gap between other end effluent air warp beam 3 and sleeve enters atmosphere by vent port 21, air-flow between axle 3 and lower air-bearing 17 forms supporting air film, and lower air-bearing 17 forms radially gas suspension by air film to axle 3; In two side clearances that the gas that enters feather key air admission hole 15 enters air supporting feather key 9 and keyway 10 by aperture 16, form gas suspension; The effect of air supporting feather key 9 is that restrictive axes 3 is freely rotated around himself axis in suspension situation completely, to eliminate the fluctuation of freely rotating the loaded weight causing due to axle 3; The gas of tested air supporting nozzle 4 ejections forms supporting air film between the end face of tested air supporting nozzle 4 and the lower surface of axle 3, thereby axle 3 is completely by gas suspension, and in axle 3 and blind hole thereof, the weight of weight 2 is accurately loaded on the supporting air film between the end face of tested air supporting nozzle 4 and the lower surface of axle 3.
In experimentation, in the blind hole of axle 3, add the known weight of weight 2 can measure the gaseous tension of privileged site in corresponding tested air supporting nozzle 4, constantly change the quantity of the weight adding, can obtain the corresponding relation between acting force in the gaseous tension of measured point in tested air supporting nozzle 4 and axle 3 lower surface formed nozzle-kickboard mechanisms and kickboard.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210043453.3A CN102589801B (en) | 2012-02-24 | 2012-02-24 | Air flotation loading test device with jet type guide keys |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210043453.3A CN102589801B (en) | 2012-02-24 | 2012-02-24 | Air flotation loading test device with jet type guide keys |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102589801A CN102589801A (en) | 2012-07-18 |
| CN102589801B true CN102589801B (en) | 2014-07-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210043453.3A Expired - Fee Related CN102589801B (en) | 2012-02-24 | 2012-02-24 | Air flotation loading test device with jet type guide keys |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106644182B (en) * | 2016-11-11 | 2018-11-23 | 合肥工业大学 | Air flotation force measuring device with negative pressure trough |
| CN107101781A (en) * | 2017-05-05 | 2017-08-29 | 中国计量科学研究院 | Dead weight type safe small force value standard set-up air-bearing support girder system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6163033A (en) * | 1997-09-10 | 2000-12-19 | Applied Materials, Inc. | Method and apparatus for controlling a workpiece in a vacuum chamber |
| US6443618B1 (en) * | 2000-07-24 | 2002-09-03 | Moore Epitaxial, Inc. | Particulate free air bearing and seal |
| CN101221077A (en) * | 2008-01-24 | 2008-07-16 | 合肥工业大学 | Air-floating multi-dimensional force sensor and multi-dimensional force measurement method |
| US7642523B1 (en) * | 2006-05-02 | 2010-01-05 | New Way Machine Components, Inc. | Vacuum chamber stage with application of vacuum from below |
-
2012
- 2012-02-24 CN CN201210043453.3A patent/CN102589801B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6163033A (en) * | 1997-09-10 | 2000-12-19 | Applied Materials, Inc. | Method and apparatus for controlling a workpiece in a vacuum chamber |
| US6443618B1 (en) * | 2000-07-24 | 2002-09-03 | Moore Epitaxial, Inc. | Particulate free air bearing and seal |
| US7642523B1 (en) * | 2006-05-02 | 2010-01-05 | New Way Machine Components, Inc. | Vacuum chamber stage with application of vacuum from below |
| CN101221077A (en) * | 2008-01-24 | 2008-07-16 | 合肥工业大学 | Air-floating multi-dimensional force sensor and multi-dimensional force measurement method |
Non-Patent Citations (2)
| Title |
|---|
| 压力式气浮测力传感器静特性研究;黄斌等;《计量学报》;20120131;第33卷(第1期);第31-34页 * |
| 黄斌等.压力式气浮测力传感器静特性研究.《计量学报》.2012,第33卷(第1期),第31-34页. |
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| CN102589801A (en) | 2012-07-18 |
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