CN220207072U - Starting auxiliary device for foil type dynamic pressure air bearing performance test - Google Patents
Starting auxiliary device for foil type dynamic pressure air bearing performance test Download PDFInfo
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- CN220207072U CN220207072U CN202321912974.8U CN202321912974U CN220207072U CN 220207072 U CN220207072 U CN 220207072U CN 202321912974 U CN202321912974 U CN 202321912974U CN 220207072 U CN220207072 U CN 220207072U
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- dynamic pressure
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- air bearing
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- 239000011888 foil Substances 0.000 title claims abstract description 21
- 238000011056 performance test Methods 0.000 title claims abstract description 15
- 230000003028 elevating effect Effects 0.000 claims description 5
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 230000007246 mechanism Effects 0.000 abstract description 5
- 239000000758 substrate Substances 0.000 abstract description 4
- 238000012360 testing method Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The utility model discloses a starting auxiliary device for foil type dynamic pressure air bearing performance test, which comprises a bottom plate, a substrate and a supporting seat, wherein a lifting mechanism for adjusting the height of the substrate is arranged between the bottom plate and the substrate; the foil dynamic pressure air bearing has the advantages that the starting condition of the foil dynamic pressure air bearing can be achieved under the condition of smaller external force, the starting time is shortened, and the device can reach a stable running state faster.
Description
Technical Field
The utility model relates to the technical field of bearing performance test, in particular to a starting auxiliary device for a foil type dynamic pressure air bearing performance test.
Background
The foil type dynamic pressure air bearing is a novel air film bearing, which adopts flexible wave foil as a supporting structure, and utilizes dynamic pressure difference formed at two ends of an air film by a high-speed rotor to generate supporting force so as to realize non-contact rotor suspension. Compared with the traditional static pressure air bearing, the foil type dynamic pressure air bearing has the advantages of high working speed, low friction loss, good stability, long service life and the like, so that the foil type dynamic pressure air bearing can be widely applied to the fields of miniature gas turbines, hydrogen fuel cell compressors, turbochargers, turbo expanders and the like which need high-speed precise operation. With the progress of the related technology, the foil type dynamic pressure air bearing has to play an important role in more high-speed rotating equipment, and the low friction characteristic of the foil type dynamic pressure air bearing also helps the equipment to realize efficient and energy-saving operation.
The existing foil type dynamic pressure air bearing performance test is that an external high-pressure air source is utilized to enable a test rotating shaft to realize quick take-off in a turbine impacting mode, after the take-off rotating speed is exceeded, the air bearing is suspended, so that performance test is carried out on the foil type dynamic pressure air bearing, in the process of taking-off of the rotating shaft, the friction force between the bearing and the surface of a rotor is quickly reduced along with the rising of the rotating speed, after an air film is gradually generated, the friction moment starts to decline, and when the friction moment reaches a minimum point, the foil is separated from the rotor. In order to obtain a higher test rotating speed, the size of the impact turbine needs to be reduced, but the moment arm length of the impact turbine is reduced, and a larger starting moment needs to be provided to drive the bearing to achieve the take-off rotating speed, but the existing test equipment and conditions are difficult to provide a matched enough starting moment, so that the bearing cannot take-off smoothly to the required rotating speed, and the accuracy of the test result is affected.
Disclosure of Invention
The utility model aims to solve the problems, and provides a starting auxiliary device for testing the performance of a foil type dynamic pressure air bearing, which can reach the starting condition of the foil type dynamic pressure air bearing under the condition of smaller external force, reduce the starting time and enable the device to reach a stable running state more quickly.
In order to achieve the above purpose, the present utility model adopts the following technical scheme: the utility model provides a foil type dynamic pressure air bearing performance test's start-up auxiliary device, includes bottom plate, base plate and supporting seat, the bottom plate with be provided with between the base plate and be used for the adjustment the elevating system of base plate height, the supporting seat is fixed the upper end of base plate, just the upper surface of supporting seat is provided with the groove of dodging that runs through from front to back, horizontal interval is connected with two auxiliary bearings on the lateral wall of supporting seat, and two auxiliary bearings is located dodge the both sides in groove, two form a jack-up region between auxiliary bearing's the outer loop.
The lower extreme of base plate is provided with the spout, it is provided with the slider to go up the slip in the spout, the upper end of bottom plate is provided with down the spout, it is provided with down the slider to slide in the spout down, elevating system includes two outer scissors and two interior scissors, two between outer scissors and the two interior scissors are articulated mutually through the scissors axle that middle part level set up, two the lower extreme of outer scissors is articulated mutually through first connecting axle and the first mount pad that sets up on the bottom plate, two the upper end of outer scissors is articulated mutually through the second connecting axle with the slider, two the lower extreme of interior scissors is articulated mutually through the third connecting axle with down the slider, two the upper end of interior scissors is articulated mutually through the second mount pad that fourth connecting axle and setting were in the base plate lower extreme, still be provided with on the base plate and be used for the drive upper slider horizontal displacement.
The driving unit comprises an adjusting hand wheel and a screw rod, the screw rod is horizontally and rotatably connected in the upper sliding groove and is in threaded fit with the upper sliding block, and one end of the screw rod extends out of the upper sliding groove and is coaxially fixed with the adjusting hand wheel.
The auxiliary bearings are ball bearings, a screw is fixed in each inner ring of each auxiliary bearing, and the screw is in threaded connection with the side wall of the supporting seat.
The base plate is provided with a plurality of hole sites, and the supporting seat is fixed on the base plate through the matching of the locking bolts and the corresponding hole sites.
And the center position of each auxiliary bearing is higher than the lowest point of the avoidance groove.
Compared with the prior art, the utility model has the advantages that: the device utilizes the lifting base plate and two auxiliary bearings which are symmetrically arranged, realizes low friction contact between the lifted foil type dynamic pressure air bearing to be tested and the main shaft, converts high static friction between the original main shaft and the fixed support into low dynamic friction between the main shaft and the auxiliary bearings through the conversion of the friction surface, greatly reduces friction resistance and driving force required by starting, can quickly reach the stable working state of the bearings under the driving of small external force, greatly shortens the starting time and improves the accuracy in the testing process.
Drawings
In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art are briefly introduced below, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic perspective view of the present utility model;
FIG. 2 is a side view of the present utility model;
FIG. 3 is a schematic perspective view of the working state of the present utility model;
in the figure, 1, a bottom plate; 2. a substrate; 3. a support base; 4. a lifting mechanism; 5. an outer scissors fork; 6. an inner scissors fork; 7. cutting the shaft; 8. a first connecting shaft; 9. a second connecting shaft; 10. a third connecting shaft; 11. a fourth connecting shaft; 12. a first mounting table; 13. a second mounting table; 14. an upper chute; 15. an upper slider; 16. a lower chute; 17. a lower slide block; 18. a driving unit; 19. an adjusting hand wheel; 20. a screw rod; 21. an auxiliary bearing; 22. a screw; 23. an avoidance groove; 24. and (5) hole sites.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Embodiment one: as shown in the figure, a foil type dynamic pressure air bearing performance test starting auxiliary device comprises a bottom plate 1, a base plate 2 and a supporting seat 3, wherein a lifting mechanism 4 for adjusting the height of the base plate 2 is arranged between the bottom plate 1 and the base plate 2, the supporting seat 3 is fixed at the upper end of the base plate 2, the upper surface of the supporting seat 3 is provided with a back-and-forth penetrating avoidance groove 23, two auxiliary bearings 21 are horizontally connected to the side wall of the supporting seat 3 at intervals, the two auxiliary bearings 21 are positioned at two sides of the avoidance groove 23, and a jacking area is formed between the outer rings of the two auxiliary bearings 21.
The lower extreme of base plate 2 is provided with upper chute 14, the upper chute 14 sliding is provided with upper slider 15, the upper end of bottom plate 1 is provided with lower chute 16, the lower chute 16 sliding is provided with lower slider 17, elevating system 4 includes two outer scissors 5 and two interior scissors 6, two outer scissors 5 are articulated mutually through the scissors axle 7 that the middle part level set up between two interior scissors 6, the lower extreme of two outer scissors 5 is articulated mutually with the first mount table 12 that sets up on bottom plate 1 through first connecting axle 8, the upper end of two outer scissors 5 is articulated mutually with upper slider 15 through second connecting axle 9, the lower extreme of two interior scissors 6 is articulated mutually with lower slider 17 through third connecting axle 10, the upper end of two interior scissors 6 is articulated mutually with the second mount table 13 that sets up at the base plate 2 lower extreme through fourth connecting axle 11, still be provided with on the base plate 2 and be used for driving upper slider 15 horizontal displacement's drive unit 18.
In the structure, the lifting mechanism 4 adopts a scissor type lifting structure, namely a stable structure in which the inner scissor 6 and the outer scissor 5 are in cross hinge joint, so that accurate and controllable lifting movement is realized, the sliding blocks are matched with corresponding sliding grooves to obtain alignment guide, the deflection is avoided to influence lifting precision, the upper sliding block 15 and the lower sliding block 17 work cooperatively to enhance rigidity, the driving unit 18 is arranged to drive the upper sliding block 15 to displace, the cross angle of the inner scissor 6 and the outer scissor 5 is changed, the whole mechanism is large in movement range and strong in bearing capacity, the structure is compact and stable, the uncertainty of a single-arm structure is avoided, and the use requirement of accurate and stable lifting of the device can be met.
Embodiment two: as shown in the figure, unlike the first embodiment, the driving unit 18 includes an adjusting hand wheel 19 and a screw rod 20, wherein the screw rod 20 is horizontally rotatably connected in the upper chute 14 and is in threaded engagement with the upper slider 15, and one end of the screw rod 20 extends out of the upper chute 14 and is coaxially fixed with the adjusting hand wheel 19.
In the structure, the driving unit 18 drives the coaxially connected screw rod 20 to rotate through the adjusting hand wheel 19, the screw rod 20 and the upper sliding block 15 are in threaded fit to realize accurate linear propulsion, the screw rod 20 is horizontally arranged in the upper sliding groove 14 and can bear radial force, the upper sliding block 15 and the upper sliding groove 14 are matched to avoid unbalanced loading of the screw rod 20, the driving of the adjusting hand wheel 19 is accurate and gapless, the whole driving is accurate and controllable, the adjusting hand wheel 19 is flexible and convenient to adjust, and the accurate positioning adjustment of the device is realized.
The auxiliary bearings 21 are ball bearings, and a screw rod 22 is fixed in the inner ring of each auxiliary bearing 21, and the screw rod 22 is screwed on the side wall of the supporting seat 3.
In the structure, the high-precision ball bearing is adopted as the auxiliary bearing 21, the fixing screw rod 22 is in threaded connection with the supporting seat 3 in the bearing inner ring, the structural design fully utilizes the low friction and high-precision positioning characteristics of the ball bearing, and the accurate fixing and fine adjustment of the auxiliary bearing 21 are realized through threaded connection, so that the bearing support is more accurate and controllable, the requirement of positioning support is ensured, the convenient disassembly and maintenance of the structure is realized, and the structure has higher precision and maintainability compared with welding or bonding connection, thereby being beneficial to reducing starting resistance and improving starting stability and test repeatability.
Embodiment III: as shown in the figure, unlike the second embodiment, the base plate 2 is provided with a plurality of holes 24, and the supporting base 3 is fixed on the base plate 2 by matching the locking bolts with the corresponding holes 24.
In the structure, a plurality of hole sites 24 are formed in the base plate 2, the supporting seat 3 is matched with the connection of different hole sites 24 through the locking bolts, the structure realizes the large-range position adjustment of the supporting seat 3, the proper hole sites 24 can be selected for quick positioning according to the size requirements of different bearings, the locking bolts enable the connection to be firmer and more rigid, the anti-vibration performance of the whole device is improved, meanwhile, the connection mode is simple and convenient, the disassembly and the adjustment are very flexible, and the universality and the applicability of the device are greatly improved.
The center of each auxiliary bearing 21 is located higher than the lowest point of the avoidance groove 23.
In the structure, the wheelbase of the two auxiliary bearings 21 is accurately matched with the diameter of the bearing to be tested, and the height arrangement is reasonable, so that the bearing to be tested can be completely separated from the original support and is accurately matched with the main shaft, the coaxiality and radial positioning precision of the bearing are guaranteed, the inclined space of the bearing is sufficient to avoid interference, the auxiliary bearings 21 can provide accurate positioning support through the optimization of the wheelbase matching and the height arrangement, the contact stress and accurate testing are facilitated to be reduced, the overall arrangement is scientific and reasonable, and the testing requirement is fully met.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.
Claims (6)
1. A foil type dynamic pressure air bearing performance test's start-up auxiliary device, its characterized in that: including bottom plate, base plate and supporting seat, the bottom plate with be provided with between the base plate and be used for the adjustment the elevating system of base plate height, the supporting seat is fixed the upper end of base plate, just the upper surface of supporting seat is provided with the back-and-forth groove of dodging that runs through, horizontal interval is connected with two auxiliary bearings on the lateral wall of supporting seat, and two auxiliary bearings is located dodge the both sides in groove, two form a jack-up region between auxiliary bearing's the outer loop.
2. A foil-type dynamic pressure air bearing performance test start-up assisting device as set forth in claim 1, wherein: the lower extreme of base plate is provided with the spout, it is provided with the slider to go up the slip in the spout, the upper end of bottom plate is provided with down the spout, it is provided with down the slider to slide in the spout down, elevating system includes two outer scissors and two interior scissors, two between outer scissors and the two interior scissors are articulated mutually through the scissors axle that middle part level set up, two the lower extreme of outer scissors is articulated mutually through first connecting axle and the first mount pad that sets up on the bottom plate, two the upper end of outer scissors is articulated mutually through the second connecting axle with the slider, two the lower extreme of interior scissors is articulated mutually through the third connecting axle with down the slider, two the upper end of interior scissors is articulated mutually through the second mount pad that fourth connecting axle and setting were in the base plate lower extreme, still be provided with on the base plate and be used for the drive upper slider horizontal displacement.
3. A foil-type dynamic pressure air bearing performance test start-up assisting device as set forth in claim 2, wherein: the driving unit comprises an adjusting hand wheel and a screw rod, the screw rod is horizontally and rotatably connected in the upper sliding groove and is in threaded fit with the upper sliding block, and one end of the screw rod extends out of the upper sliding groove and is coaxially fixed with the adjusting hand wheel.
4. A foil-type dynamic pressure air bearing performance test start-up assisting device as set forth in claim 1, wherein: the auxiliary bearings are ball bearings, a screw is fixed in each inner ring of each auxiliary bearing, and the screw is in threaded connection with the side wall of the supporting seat.
5. A foil-type dynamic pressure air bearing performance test start-up assisting device as set forth in claim 1, wherein: the base plate is provided with a plurality of hole sites, and the supporting seat is fixed on the base plate through the matching of the locking bolts and the corresponding hole sites.
6. A foil-type dynamic pressure air bearing performance test start-up assisting device as set forth in claim 1, wherein: and the center position of each auxiliary bearing is higher than the lowest point of the avoidance groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321912974.8U CN220207072U (en) | 2023-07-20 | 2023-07-20 | Starting auxiliary device for foil type dynamic pressure air bearing performance test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321912974.8U CN220207072U (en) | 2023-07-20 | 2023-07-20 | Starting auxiliary device for foil type dynamic pressure air bearing performance test |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220207072U true CN220207072U (en) | 2023-12-19 |
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ID=89150449
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321912974.8U Active CN220207072U (en) | 2023-07-20 | 2023-07-20 | Starting auxiliary device for foil type dynamic pressure air bearing performance test |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220207072U (en) |
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2023
- 2023-07-20 CN CN202321912974.8U patent/CN220207072U/en active Active
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