CN208672308U - A kind of air-floating ball bearing device for detecting performance - Google Patents
A kind of air-floating ball bearing device for detecting performance Download PDFInfo
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- CN208672308U CN208672308U CN201821012048.4U CN201821012048U CN208672308U CN 208672308 U CN208672308 U CN 208672308U CN 201821012048 U CN201821012048 U CN 201821012048U CN 208672308 U CN208672308 U CN 208672308U
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Abstract
The utility model discloses a kind of air-floating ball bearing device for detecting performance.Existing air-floating ball bearing method for testing performance can not accurately analyze bearing performance.The pressure tap of the utility model is towards bearing ball-and-socket；The external screw thread of rotary shaft and pilot bar is separately connected with symmetrical two threaded holes of bulb；The gauge head of displacement sensor is placed at the top of bulb；Air film gap, which is formed, when bearing ball-and-socket is passed through pressed gas, between bearing ball-and-socket and bulb supports bulb；Load cylinder carries ball-and-socket by force snesor, bearing support and open type air bearing and bearing capacity is transmitted on bulb；Open type air bearing carrying ball-and-socket is passed through pressed gas, and air film gap is formed between bulb；In conjunction with broadwise turntable and through realizing the pressure detecting in air-floating ball bearing each position air film gap to rotating disk.The utility model is measured using single pressure tap mode, and flow field caused by beating multiple pressure taps is avoided to be distorted；The direct measure-ball displacement variable of displacement sensor avoids measuring plane indirectly and causes measured deviation.
Description
Technical field
The utility model belongs to Technology of Precision Measurement field, and in particular to a kind of air-floating ball bearing device for detecting performance.
Background technique
Air-floating ball bearing has many advantages, such as high kinematic accuracy, low friction resistance and adaptable, and it is flat to be widely used in air bearing
The precision equipments such as platform, accurate main shaft and gyroscope are the ideal supporting parts of ultra precise measurement instrument.
To meet requirement of the application field to air-floating ball bearing, influence situation of each parameter to bearing performance need to be analyzed, into
And complete Parameters Optimal Design.Air-floating ball bearing performance detection mainly measures air-floating ball bearing in different supply gas pressures and difference
The static performance index such as pressure distribution situation in bearing capacity and air film gap under air-film thickness.
Currently, bearing capacity loading method mainly uses weight type, air-cylinder type and bullet in air-floating ball bearing performance detection
Spring formula etc., wherein the connection type of load device and air-floating ball bearing is rigid connection, this not judging gas when detection
Whether floating ball bearing is in running order.And when measuring air film gap, using the phase of a certain plane of displacement sensor bearing
To displacement, this mode is preferable for the air film clearance measurement effect of air-floatation planar bearing, but for air-floating ball bearing, when
The plane of selection deflects when tilting, and relative shift measured by sensor is not the variable quantity in air film gap, thus can not
Obtain accurate performance indicator.For the pressure distribution situation in measurement air film gap, the mode of pressure tap is mostly used out to measure
The pressure value of air film gap each position, this just needs out the pressure tap in multiple orientation that could more fully reflect dividing for air film gap
Cloth situation, but when the more pressure tap of distribution, pressure tap will change the flow field characteristic in air film gap, be distorted pressure distribution situation.
Due to the deficiency of above-mentioned detection mode, bearing behavior pattern can not be accurately analyzed, is set for the parameter optimization of bearing
Meter and correlation theory verifying bring difficulty.
Summary of the invention
The purpose of this utility model is the deficiency for air-floating ball bearing performance detection mode, proposes a kind of air-floating ball bearing
Device for detecting performance can accurately detect the spies such as bearing capacity, static rigidity and air film the clearance pressure distribution of air-floating ball bearing
Property.
The technical scheme adopted by the utility model to solve the technical problem is as follows:
The utility model include pedestal, broadwise turntable, rotary shaft, through to rotating disk, carrying power load maintainer, displacement pass
Sensor, gas pressure sensor and pilot bar；The broadwise turntable includes chassis and turntable；Chassis is fixed on the base,
Turntable and chassis constitute revolute pair；The chassis is equipped with dial, and turntable is equipped with index line；The fixation of turntable top surface is related
In the symmetrical two turret supports framves of turntable center of rotation；The sliding slot of two pieces of support slippers and two turret supports framves respectively constitutes
Glide direction is the prismatic pair of vertical direction；Rotary shaft and pilot bar and two support slippers respectively constitute revolute pair, and rotate
The alignment setting of the central axis of axis and pilot bar；The inner end side wall of rotary shaft and pilot bar is equipped with external screw thread；Through to rotating disk
It is fixed on rotary shaft outer end；It is described through being equipped with dial to rotating disk, close to through being set on the turret supports frame to rotating disk
There is index line；The pilot bar offers the open centre bore in both ends, and gas pressure sensor is arranged in pilot bar outer end,
And it is embedded in centre bore；The carrying power load maintainer include air cylinder support, load cylinder, force snesor, bearing support and
Open type air bearing carries ball-and-socket；The cylinder body of load cylinder is fixed on air cylinder support, and air cylinder support is fixed with pedestal；Load cylinder
Push rod is connect with bearing support by force snesor.Open type air bearing carrying ball-and-socket is fixed on bearing support bottom；Open type air bearing is held
The central axis for carrying ball-and-socket vertical direction is overlapped with the central axis of turntable；The lateral surface of open type air bearing carrying ball-and-socket opens up air inlet
Mouthful, the spherical surface of open type air bearing carrying ball-and-socket opens up circumferentially distributed multiple throttling air inlets, the central axis of each air inlet that throttles
Line crosses the spherical surface centre of sphere of open type air bearing carrying ball-and-socket；Open type air bearing carries the hollow inside of ball-and-socket and forms annular air cavity, annular
Air cavity is connected to air inlet and all throttling air inlets；Open type air bearing carrying ball-and-socket top end surface offers gas outlet；Gas outlet
Central axis crosses the spherical surface centre of sphere of open type air bearing carrying ball-and-socket.
The displacement sensor is used to detect the gap between at the top of the bulb of gauge head and air-floating ball bearing.
The beneficial effects of the utility model are:
(1) bearing capacity is loaded using cylinder, it can be achieved that continuous load is guaranteeing to apply in conjunction with open type air bearing carrying ball-and-socket
While bearing capacity, bulb can keep motion state, the working condition of ball bearing when convenient for judging detection performance.
(2) it when air film gap displacement measures, using the displacement variable of the direct measure-ball of displacement sensor gauge head, avoids
Measured deviation caused by measurement plane indirectly.
(3) it when air film clearance pressure detects, is measured using single pressure tap mode, passes through swing offset platform (broadwise turntable
With through to rotating disk) change measurement position, realize that the pressure in air film gap is distributed detection, avoid stream caused by beating multiple pressure taps
Field distortion problem.
(4) swing offset platform works independently, and only adjusts and works to the position of bulb, without bearing the shadow of bearing capacity
It rings.In swing offset platform type selecting, in the case of not considering bearing capacity (100kg grades), the rotation position of higher precision can choose
Moving stage.
Detailed description of the invention
Fig. 1 is the assembling schematic diagram of the utility model；
Fig. 2 is the working state schematic representation of air-floating ball bearing in the utility model；
Fig. 3 is for broadwise turntable in the utility model and through the assembling schematic diagram to rotating disk；
Fig. 4 is in the utility model through the structural schematic diagram to rotating disk.
In figure: 1- pedestal, 2- broadwise turntable, 3- turret supports frame, 4- bearing ball-and-socket, 5- support slipper, 6- rotary shaft,
For 7- through to rotating disk, 8- open type air bearing carries ball-and-socket, 9- air cylinder support, 10- loads cylinder, 11- force snesor, 12- carrying branch
Frame, 13- displacement sensor, 14- gas pressure sensor, 15- pilot bar, 16- bulb, 17- pressure tap.
Specific embodiment
The present invention will be further described with reference to the accompanying drawing.
As shown in Fig. 1,2,3 and 4, a kind of air-floating ball bearing device for detecting performance, including pedestal 1, broadwise turntable 2, rotation
Shaft 6, through to rotating disk 7, carrying power load maintainer, displacement sensor 13, gas pressure sensor 14 and pilot bar 15；Pedestal
1 is the support platform of entire detection device；Broadwise turntable 2 includes chassis and turntable；Chassis is fixed on pedestal 1, turntable with
Chassis constitutes revolute pair；Chassis is equipped with dial, and turntable is equipped with index line；Turntable top surface is fixed with about in turntable rotation
The symmetrical two turret supports framves 3 of the heart；The sliding slot of two pieces of support slippers 5 and two turret supports framves 3 respectively constitutes glide direction
For the prismatic pair of vertical direction；Rotary shaft 6 and pilot bar 15 and two support slippers 5 respectively constitute revolute pair, and 6 He of rotary shaft
The central axis of pilot bar 15 is aligned setting；The inner end side wall of rotary shaft 6 and pilot bar 15 is equipped with external screw thread；Through to rotating disk
7 are fixed on 6 outer end of rotary shaft；Through being equipped with dial to rotating disk 7, close to through being equipped with to the turret supports frame 3 of rotating disk 7
Index line；Pilot bar 15 offers the open centre bore in both ends, and gas pressure sensor 14 is arranged in 15 outer end of pilot bar, and
It is embedded in centre bore；Carrying power load maintainer includes air cylinder support 9, load cylinder 10, force snesor 11, bearing support 12 and opens
Formula air bearing carries ball-and-socket 8；In the detection of air-floating ball bearing strength performance, loaded using load cylinder 10；Load cylinder
10 cylinder body is fixed on air cylinder support 9, and air cylinder support 9 and pedestal 1 are fixed；Push rod and the bearing support 12 for loading cylinder 10 are logical
The connection of force snesor 11 is crossed, force snesor 11 realizes the measurement of bearing capacity.Open type air bearing carrying ball-and-socket 8 is fixed on bearing support 12
Bottom；The central axis of open type air bearing carrying 8 vertical direction of ball-and-socket is overlapped with the central axis of turntable；Load what cylinder 10 applied
Bearing capacity carries ball-and-socket 8 by bearing support 12 and open type air bearing and is loaded on bulb 16.The outside of open type air bearing carrying ball-and-socket 8
Face opens up air inlet, and the spherical surface of open type air bearing carrying ball-and-socket 8 opens up circumferentially distributed multiple (the present embodiment is six) throttlings
The central axis of air inlet, each air inlet that throttles crosses the spherical surface centre of sphere of open type air bearing carrying ball-and-socket 8；Open type air bearing carries ball-and-socket
8 hollow inside form annular air cavity, and annular air cavity is connected to air inlet and all throttling air inlets；Open type air bearing carries ball-and-socket 8
Top end surface offers gas outlet；The central axis of gas outlet crosses the spherical surface centre of sphere of open type air bearing carrying ball-and-socket 8.
Displacement sensor 13 is used to detect the gap between at the top of the bulb of gauge head and air-floating ball bearing.
Air-floating ball bearing includes bearing ball-and-socket 4 and bulb 16, is the test object of the utility model performance test；The air bearing
The working principle of ball bearing device for detecting performance is as follows:
1,4 bottom of bearing ball-and-socket of air-floating ball bearing and pedestal 1 is fixed, and make the center of 4 vertical direction of bearing ball-and-socket
Axis is overlapped with the central axis of turntable, as shown in Fig. 2, bearing ball-and-socket 4 is the support member of air-floating ball bearing.In air floatation ball axis
It opens up and is mutually perpendicular to and two radially arranged airflow holes on the bulb 16 held, one of air-flow outer end of hole port insertion section
Device is flowed, another air-flow outer end of hole thread mill drilling, the other side opposite with the threaded hole is machined with another on 16 spherical surface of bulb
A threaded hole, two threaded hole coaxial arrangements；Since pressure tap diameter cannot be too big, and consider processing cost, thus using
The flow controller mode of the air-flow outer end of hole port insertion small-bore of larger aperture, the pressure tap 17 for completing smaller aperture due are processed；It will
Bulb 16 is placed on bearing ball-and-socket 4, and pressure tap 17 is arranged towards bearing ball-and-socket 4, is rotated rotary shaft 6 and pilot bar 15, is made
It obtains rotary shaft 6 and the external screw thread of pilot bar 15 and two threaded holes of bulb 16 is separately connected fixation.
When bearing ball-and-socket 4 is passed through pressed gas, air film gap (micron order) is formed between bearing ball-and-socket 4 and bulb 16
Bulb 16 is supported, keeps bulb 16 in running order, the approximate rotary motion without frictional resistance can be done around the centre of sphere.
2, air-floating ball bearing bearing capacity loads:
It is passed through pressed gas to load cylinder 10, the push rod of load cylinder 10 exports bearing capacity, by force snesor 11, holds
It carries bracket 12 and bearing capacity is transmitted on bulb 16 by open type air bearing carrying ball-and-socket 8；Open type air bearing carrying ball-and-socket 8 is matched with bulb 16
It closes, the gas outlet at 8 top of open type air bearing carrying ball-and-socket is higher than at the top of bulb 16；The measurement load cylinder 10 of force snesor 11 exports
Bearing capacity size；Open type air bearing carrying ball-and-socket 8 is passed through pressed gas, air film gap is formed between bulb 16, to make bulb
16 keep rotary motion under bearing capacity effect, and whether intuitive judgment air-floating ball bearing is in running order, completes bearing capacity
Continuous load and measurement.
3, air-floating ball bearing air film gap detection:
The gauge head of displacement sensor 13 is placed on 16 top of bulb, the vertical axis of gauge head and bulb 16 is coaxial.Work as ball
When first 16 rotation, change the supply gas pressure or bearing capacity of bearing ball-and-socket 4,16 top of detection 13 gauge head of displacement sensor and bulb
Displacement variable, the displacement variable are the displacement variable of 16 centre of sphere of bulb, are also the air film of bulb 16 and bearing ball-and-socket 4
Gap variable quantity.In conjunction with the measurement situation of bearing capacity, the bearer properties relationship (bearing capacity and air film of air-floating ball bearing can establish
Gap relationships), complete the performance detections such as bearer properties and static rigidity.
4, air-floating ball bearing air film clearance pressure detects:
As shown in Figure 3,4, air film clearance pressure is transmitted to gas pressure by airflow hole and pilot bar 15 and passed by pressure tap 17
Sensor 14 completes gas by pascal's principle it is found that the pressure value that gas pressure sensor 14 detects is exactly air film clearance pressure
Intermembrane space pressure detecting.Support slipper 5 slides up and down along the chute with the movement of bulb 16, guarantees that bulb 16 is adjusting pressure tap
Stable working condition is still kept when 17 position.By rotating broadwise turntable 2, rotates bulb 16 along broadwise, realize latitude
To the pressure detecting in air film gap when variation；Similarly, rotation to rotating disk 7, rotate bulb 16 around rotary shaft, realization through to
The pressure detecting in air film gap when variation.In conjunction with broadwise turntable 2 and through realizing each position of air-floating ball bearing to rotating disk 7
The pressure detecting in air film gap completes the pressure distribution detection of entire air film gap area.The utility model surveys pressure using single
Hole mode measures, and avoids influence of multiple pressure taps to air film gap flow field.
Claims (2)
1. a kind of air-floating ball bearing device for detecting performance, including pedestal, broadwise turntable, rotary shaft, through to rotating disk, bearing capacity
Loading mechanism, displacement sensor, gas pressure sensor and pilot bar, it is characterised in that: the broadwise turntable includes bottom
Disk and turntable；Chassis is fixed on the base, and turntable and chassis constitute revolute pair；The chassis is equipped with dial, on turntable
Equipped with index line；Turntable top surface is fixed with about the symmetrical two turret supports framves of turntable center of rotation；Two pieces of support slippers with
The sliding slot of two turret supports framves respectively constitutes the prismatic pair that glide direction is vertical direction；Rotary shaft and pilot bar and two branch
Support sliding block respectively constitutes revolute pair, and the alignment setting of the central axis of rotary shaft and pilot bar；The inner end of rotary shaft and pilot bar
Side wall is equipped with external screw thread；Through being fixed on rotary shaft outer end to rotating disk；It is described through being equipped with dial to rotating disk, it is close
Through being equipped with index line to the turret supports frame of rotating disk；The pilot bar offers the open centre bore in both ends, gas
Pressure sensor is arranged in pilot bar outer end, and is embedded in centre bore；The carrying power load maintainer includes air cylinder support, adds
Carrier gas cylinder, force snesor, bearing support and open type air bearing carry ball-and-socket；The cylinder body of load cylinder is fixed on air cylinder support, gas
Jar support is fixed with pedestal；The push rod of load cylinder is connect with bearing support by force snesor；It is solid that open type air bearing carries ball-and-socket
It is scheduled on bearing support bottom；The central axis of open type air bearing carrying ball-and-socket vertical direction is overlapped with the central axis of turntable；Open type
The lateral surface of air bearing carrying ball-and-socket opens up air inlet, and the spherical surface of open type air bearing carrying ball-and-socket opens up circumferentially distributed multiple throttlings
The central axis of air inlet, each air inlet that throttles crosses the spherical surface centre of sphere of open type air bearing carrying ball-and-socket；Open type air bearing carries ball-and-socket
Hollow inside forms annular air cavity, and annular air cavity is connected to air inlet and all throttling air inlets；Open type air bearing carries ball-and-socket top
End surface offers gas outlet；The central axis of gas outlet crosses the spherical surface centre of sphere of open type air bearing carrying ball-and-socket.
2. a kind of air-floating ball bearing device for detecting performance according to claim 1, it is characterised in that: the displacement sensing
Device is used to detect the gap between at the top of the bulb of gauge head and air-floating ball bearing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821012048.4U CN208672308U (en) | 2018-06-28 | 2018-06-28 | A kind of air-floating ball bearing device for detecting performance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821012048.4U CN208672308U (en) | 2018-06-28 | 2018-06-28 | A kind of air-floating ball bearing device for detecting performance |
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| CN208672308U true CN208672308U (en) | 2019-03-29 |
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| CN201821012048.4U Active CN208672308U (en) | 2018-06-28 | 2018-06-28 | A kind of air-floating ball bearing device for detecting performance |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108627344A (en) * | 2018-06-28 | 2018-10-09 | 杭州电子科技大学 | A kind of air-floating ball bearing device for detecting performance and detection method |
| CN109916353A (en) * | 2019-04-01 | 2019-06-21 | 中国船舶重工集团公司第七一九研究所 | A kind of buoyant raft bidirectional displacement monitoring device and method |
| CN110296839A (en) * | 2019-08-13 | 2019-10-01 | 中国工程物理研究院机械制造工艺研究所 | Gas film pressure test device and test method for gas bearing |
| CN113945344A (en) * | 2020-07-17 | 2022-01-18 | 河南科技大学 | Gas film rigidity measuring method of gas bearing |
| CN114441168A (en) * | 2020-11-04 | 2022-05-06 | 中国科学院理化技术研究所 | Testing device and turbo expander |
| CN117490952A (en) * | 2024-01-02 | 2024-02-02 | 迈为技术(珠海)有限公司 | Air bearing rigidity testing device |
| CN117928927A (en) * | 2024-03-25 | 2024-04-26 | 农业农村部南京农业机械化研究所 | Structural member detection device and method for highland barley planter |
| CN117928927B (en) * | 2024-03-25 | 2024-05-31 | 农业农村部南京农业机械化研究所 | Structural member detection device and method for highland barley planter |
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2018
- 2018-06-28 CN CN201821012048.4U patent/CN208672308U/en active Active
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108627344A (en) * | 2018-06-28 | 2018-10-09 | 杭州电子科技大学 | A kind of air-floating ball bearing device for detecting performance and detection method |
| CN108627344B (en) * | 2018-06-28 | 2023-10-10 | 杭州电子科技大学 | Device and method for detecting performance of air floatation ball bearing |
| CN109916353A (en) * | 2019-04-01 | 2019-06-21 | 中国船舶重工集团公司第七一九研究所 | A kind of buoyant raft bidirectional displacement monitoring device and method |
| CN109916353B (en) * | 2019-04-01 | 2024-01-16 | 中国船舶重工集团公司第七一九研究所 | Device and method for monitoring bidirectional displacement of floating raft |
| CN110296839A (en) * | 2019-08-13 | 2019-10-01 | 中国工程物理研究院机械制造工艺研究所 | Gas film pressure test device and test method for gas bearing |
| CN110296839B (en) * | 2019-08-13 | 2024-02-06 | 中国工程物理研究院机械制造工艺研究所 | Air film pressure testing device and testing method for gas bearing |
| CN113945344A (en) * | 2020-07-17 | 2022-01-18 | 河南科技大学 | Gas film rigidity measuring method of gas bearing |
| CN114441168A (en) * | 2020-11-04 | 2022-05-06 | 中国科学院理化技术研究所 | Testing device and turbo expander |
| CN117490952A (en) * | 2024-01-02 | 2024-02-02 | 迈为技术(珠海)有限公司 | Air bearing rigidity testing device |
| CN117490952B (en) * | 2024-01-02 | 2024-04-12 | 迈为技术(珠海)有限公司 | Air bearing rigidity testing device |
| CN117928927A (en) * | 2024-03-25 | 2024-04-26 | 农业农村部南京农业机械化研究所 | Structural member detection device and method for highland barley planter |
| CN117928927B (en) * | 2024-03-25 | 2024-05-31 | 农业农村部南京农业机械化研究所 | Structural member detection device and method for highland barley planter |
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