CN209724968U - A kind of cantilever style radial foil bearing - Google Patents
A kind of cantilever style radial foil bearing Download PDFInfo
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- CN209724968U CN209724968U CN201821343681.1U CN201821343681U CN209724968U CN 209724968 U CN209724968 U CN 209724968U CN 201821343681 U CN201821343681 U CN 201821343681U CN 209724968 U CN209724968 U CN 209724968U
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- 239000011888 foil Substances 0.000 title claims abstract description 239
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 6
- 229910000906 Bronze Inorganic materials 0.000 claims description 5
- 229910052790 beryllium Inorganic materials 0.000 claims description 5
- ATBAMAFKBVZNFJ-UHFFFAOYSA-N beryllium atom Chemical compound [Be] ATBAMAFKBVZNFJ-UHFFFAOYSA-N 0.000 claims description 5
- 239000010974 bronze Substances 0.000 claims description 5
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 claims description 5
- 239000010935 stainless steel Substances 0.000 claims description 4
- 229910001220 stainless steel Inorganic materials 0.000 claims description 4
- 239000000956 alloy Substances 0.000 claims description 3
- 229910052759 nickel Inorganic materials 0.000 claims description 3
- 229910000851 Alloy steel Inorganic materials 0.000 claims description 2
- 238000009434 installation Methods 0.000 abstract 1
- 230000005587 bubbling Effects 0.000 description 24
- 238000013016 damping Methods 0.000 description 22
- 238000010586 diagram Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000010485 coping Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000000116 mitigating effect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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Abstract
The utility model provides a kind of cantilever style radial foil bearing, comprising: bearing block, multiple resilient support members, multiple cantilever paillons；Wherein, bearing block inner wall offers multiple axial card slots, the corresponding resilient support members of card slot and a cantilever paillon；According to sequence from outside to inside in bearing block, successively installation resilient support members and cantilever paillon, resilient support members one end is fixed in corresponding card slot by pin overlapping with cantilever paillon one end, the resilient support members other end is in free state with the corresponding cantilever paillon other end, and each cantilever paillon other end is circumferentially freely overlapped on adjacent cantilever paillon；Resilient support members are bonded with bearing block inner wall, and resilient support members are contacted with corresponding cantilever paillon line or face contact, segmented line contact or face contact between adjacent cantilever paillon.The utility model has the characteristics that multiple-rigidity, loading force are higher, it is stronger to mitigate the ability of impact vibration, can be widely applied to field of bearings.
Description
Technical Field
The utility model relates to a dynamic pressure gas bearing technical field especially relates to a cantilever type radial foil bearing.
Background
In practical application, the angular deviation of the shaft occurs when the dynamic pressure gas bearing is loaded, which results in the reduction of the bearing capacity and the serious abrasion. Foil gas bearings are hydrodynamic gas bearings having a self-acting compliant surface, typically made of metal foil. The foil gas bearing has certain rigidity and damping due to the flexible surface, and the thickness of a gas film in the bearing can be adaptively changed according to the load condition, so that the bearing can adapt to the angle deviation of a shaft in a certain range, and the bearing capacity and the capacity of relieving impact vibration of the bearing are improved. However, the conventional cantilever type foil bearing cannot well cope with impact load and whirling motion in the operation process through foil deformation due to a single support structure, and is easy to cause friction damage between a shaft and the foil.
The Chinese patent application with the application number of '2012103828306' and the invention name of 'a multi-layer bubbling foil radial dynamic pressure gas bearing' discloses a multi-layer bubbling foil radial dynamic pressure gas bearing, wherein a flat foil and a bubbling foil are always in contact in a load range, so that the rigidity characteristic of the bearing is single. In the static and dynamic characteristic analysis research of the cantilever type foil dynamic pressure gas bearing published by the tenth national gas lubrication and dry gas seal academic convention of the ministry of Jujian, 2012, the bump foil can only provide single rigidity for the bearing.
It can be seen that in the prior art, the foil can only provide a single stiffness for the cantilever-type foil bearing, so that the load force of the cantilever-type foil bearing is low, and the capability of mitigating the impact vibration is also low.
Disclosure of Invention
In view of the above, the main object of the present invention is to provide a cantilever radial foil bearing having multiple stiffness, high load capacity, and strong capability of damping impact vibration.
In order to achieve the above object, the utility model provides a technical scheme does:
a cantilever-type radial foil bearing comprising: the device comprises a bearing seat, more than three elastic supporting elements and more than three cantilever foils; wherein,
more than three axial clamping grooves are uniformly formed in the inner wall of the bearing seat along the circumferential direction, the number of the elastic supporting elements and the number of the cantilever foils are the same as the number of the clamping grooves, and one clamping groove corresponds to one elastic supporting element and one cantilever foil; sequentially installing corresponding elastic supporting elements and cantilever foils in the bearing seat from outside to inside, wherein one ends of the elastic supporting elements and one ends of the cantilever foils are used as fixed ends and are overlapped and fixed in corresponding clamping grooves through pins, the other ends of the elastic supporting elements and the other ends of the corresponding cantilever foils are used as free ends and are in a free state, and the other end of each cantilever foil is freely lapped on an adjacent cantilever foil along the circumferential direction; the elastic supporting element is attached to the inner wall of the bearing seat, the elastic supporting element is in line contact or surface contact with the corresponding cantilever foils, and adjacent cantilever foils are in segmented line contact or surface contact.
To sum up, cantilever type radial foil bearing installs corresponding elastic support component and cantilever foil, elastic support component and the laminating of bearing frame inner wall in proper order by outer in the bearing frame. The resilient support element or cantilever foil stretches when the cantilever-type radial foil bearing is loaded. When the load is small, only the cantilever foil extends under the action of the pressure of the air film, and only the cantilever foil plays a supporting role, so that the cantilever type radial foil bearing has cantilever foil structure damping and the elastic supporting element suspends the adjacent arm foils to have friction damping. With the increase of the load, the structural damping of the cantilever foils and the frictional damping between the adjacent cantilever foils of the elastic support element of the cantilever type radial foil bearing are gradually increased. Along with the further increase of the load, the elastic support element and the cantilever foil extend under the action of the pressure of the air film, the elastic support element and the cantilever foil jointly play a supporting role, and at the moment, the cantilever type radial foil bearing has elastic support element structure damping, cantilever foil structure damping, friction damping between the elastic support element and the cantilever foil, and friction damping between the elastic support element and the adjacent cantilever foil; moreover, these frictional damping increases gradually as the load increases. Therefore, along with the increase of the load, the line contact or the surface contact of the elastic supporting element and the corresponding cantilever foil, the sectional line contact or the surface contact between the adjacent cantilever foils are further enhanced, and the coupling rigidity of the elastic supporting element and the cantilever foils is also gradually enhanced, so that the cantilever type radial foil bearing has obvious nonlinear sectional multiple rigidity characteristic and nonlinear sectional damping change characteristic, and the bearing capacity and the operation stability of the cantilever type radial foil bearing are greatly improved; and simultaneously, along with the increase of load, cantilever type radial foil bearing more can adapt to the angular deviation of axle, produces great deformation at the big one end elastic support component of deviation or cantilever foil, and produces less deformation at the little one end elastic support component of deviation or cantilever foil, thereby makes cantilever type radial foil bearing has better bearing characteristic and the ability of coping with the impact.
Drawings
Fig. 1 is a schematic diagram of the general composition structure of the cantilever radial foil bearing of the present invention.
Fig. 2 is a schematic structural diagram of the cantilever-type radial foil bearing of the present invention, when the load is small, the elastic supporting element and the cantilever foil are in line contact only at the fixed end.
Fig. 3 is a schematic structural diagram of the cantilever-type radial foil bearing of the present invention in a state where the elastic support element is completely attached to the cantilever foil when the load is large.
Fig. 4 is a schematic view of the process of the cantilever radial foil bearing of the present invention in which the elastic supporting element and the cantilever foil come into contact with each other gradually from the fixed end under the condition of increasing load.
Fig. 5(a) is a schematic structural view of the support member with equal height elasticity.
Fig. 5(b) is a schematic structural view of the high elastic support member.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
Fig. 1 is a schematic diagram of the general composition structure of the cantilever radial foil bearing of the present invention. As shown in fig. 1, the cantilever type radial foil bearing of the present invention comprises: the device comprises a bearing seat 1, more than three elastic supporting elements 2 and more than three cantilever foils 3; wherein,
more than three axial clamping grooves 5 are uniformly formed in the inner wall of the bearing seat 1 along the circumferential direction, the number of the elastic supporting elements 2 and the number of the cantilever foils 3 are the same as that of the clamping grooves 5, and one clamping groove 5 corresponds to one elastic supporting element 2 and one cantilever foil 3; the method comprises the following steps that corresponding elastic supporting elements 2 and cantilever foils 3 are sequentially installed in a bearing seat 1 from outside to inside, one ends of the elastic supporting elements 2 and one ends of the cantilever foils 3 are used as fixed ends and are overlapped and fixed in corresponding clamping grooves 5 through pins 4, the other ends of the elastic supporting elements 2 and the other ends of the corresponding cantilever foils 3 are used as free ends and are in a free state, and the free end of each cantilever foil 3 is freely lapped on the adjacent cantilever foil 3 along the circumferential direction; the circumferential length of each elastic supporting element 2 is slightly smaller than the distance between the adjacent clamping grooves 5, the elastic supporting elements 2 are attached to the inner wall of the bearing seat 1, the elastic supporting elements 2 are in line contact or surface contact with the corresponding cantilever foils 3, and the adjacent cantilever foils 3 are in segmented line contact or surface contact.
In practical applications, the number of the elastic support elements 2, the number of the cantilever foils 3, and the number of the slots 5 may be determined according to practical requirements.
The utility model discloses in, cantilever type radial foil bearing's length is 25 millimeters, and the axle diameter is 25 millimeters.
In a word, cantilever type radial foil bearing installs corresponding elastic support component and cantilever foil, elastic support component and the laminating of bearing frame inner wall in proper order by outside to interior in the bearing frame. The resilient support element or cantilever foil stretches when the cantilever-type radial foil bearing is loaded. When the load is small, only the cantilever foil extends under the action of the pressure of the air film, and only the cantilever foil plays a supporting role, so that the cantilever type radial foil bearing has cantilever foil structure damping and the elastic supporting element suspends the adjacent arm foils to have friction damping. With the increase of the load, the structural damping of the cantilever foils and the frictional damping between the adjacent cantilever foils of the elastic support element of the cantilever type radial foil bearing are gradually increased. Along with the further increase of the load, the elastic support element and the cantilever foil extend under the action of the pressure of the air film, the elastic support element and the cantilever foil jointly play a supporting role, and at the moment, the cantilever type radial foil bearing has elastic support element structure damping, cantilever foil structure damping, friction damping between the elastic support element and the cantilever foil, and friction damping between the elastic support element and the adjacent cantilever foil; moreover, these frictional damping increases gradually as the load increases. Therefore, along with the increase of the load, the line contact or the surface contact of the elastic supporting element and the corresponding cantilever foil, the sectional line contact or the surface contact between the adjacent cantilever foils are further enhanced, and the coupling rigidity of the elastic supporting element and the cantilever foils is also gradually enhanced, so that the cantilever type radial foil bearing has obvious nonlinear sectional multiple rigidity characteristic and nonlinear sectional damping change characteristic, and the bearing capacity and the operation stability of the cantilever type radial foil bearing are greatly improved; and simultaneously, along with the increase of load, cantilever type radial foil bearing more can adapt to the angular deviation of axle, produces great deformation at the big one end elastic support component of deviation or cantilever foil, and produces less deformation at the little one end elastic support component of deviation or cantilever foil, makes bearing clearance, pressure distribution etc. keep unanimous basically along the axial, thereby makes cantilever type radial foil bearing has better bearing characteristic and the ability of coping with the impact.
Fig. 2 is a schematic structural diagram of the cantilever-type radial foil bearing of the present invention, when the load is small, the elastic supporting element and the cantilever foil are in line contact only at the fixed end. Fig. 3 is a schematic structural diagram of the cantilever-type radial foil bearing of the present invention in a state where the elastic support element is completely attached to the cantilever foil when the load is large. Fig. 4 is a schematic view of the process of the cantilever radial foil bearing of the present invention in which the elastic supporting element and the cantilever foil come into contact with each other gradually from the fixed end under the condition of increasing load. As shown in fig. 2, 3 and 4, the elastic supporting element 2 of the present invention is in line contact or surface contact with the corresponding cantilever foil 3, and the adjacent cantilever foils 3 are in line contact or surface contact with each other in stages, specifically:
when the cantilever type radial foil bearing is unloaded, the elastic supporting element 2 is in line contact with the corresponding cantilever foil 3 near the fixed end, the elastic supporting element 2 is not in line contact with the corresponding cantilever foil 3 at the other parts except the fixed end, and the adjacent cantilever foils 3 are in line contact at the free lap joint.
When the cantilever type radial foil bearing is loaded, the following conditions can be sequentially generated in a segmentation way along with the gradual increase of the load:
when the load of the cantilever-type radial foil bearing is in a first load range, the elastic support element 2 is in line contact with the corresponding cantilever foil 3 near the fixed end, the elastic support element 2 is not in line contact with the corresponding cantilever foil 3 at the other parts except the fixed end, and the adjacent cantilever foils 3 are in line contact at the extension lap joint. At this moment, cantilever type radial foil bearing only plays the bearing effect through the deformation of cantilever foil 3, cantilever type radial foil bearing rigidity size is only decided by structural parameters such as thickness, curvature radius, foil opening angle and foil figure of cantilever foil 3.
When the cantilever type radial foil bearing load is in the second load range, the elastic support element 2 is partially in surface contact with the corresponding cantilever foil 3 from the fixed end, and the adjacent cantilever foils 3 are partially in surface contact at the extension lap joint part. At this time, the cantilever foils 3 are greatly deformed by a large load, a certain degree of surface contact occurs between the mutually overlapped cantilever foils 3, the cantilever foils 3 and the supporting elastic element 2 are gradually in certain surface contact from the fixed end, the cantilever type radial foil bearing plays a bearing role through small partial deformation of the adjacent cantilever foils 3 and partial deformation of the elastic supporting element 2, and the overall supporting rigidity and the local rigidity of the bearing are greatly improved.
When the load of the cantilever type radial foil bearing is in a third load range, the elastic supporting element 2 is completely attached to the corresponding cantilever foil 3, and the adjacent cantilever foils 3 are partially in surface contact at the extension lap joint part. At this time, the multiple nonlinear stiffness characteristics formed by the complete deformation of the elastic supporting element 2 and the large deformation between the adjacent cantilever foils 3 serve as an elastic supporting function, and the supporting function formed by the complete adhesion of the elastic supporting element 2 and the corresponding elastic supporting element 2 serves as a main supporting function for the multiple nonlinear stiffness characteristics.
The utility model discloses in, the interval maximum value and the minimum of first load scope, second load scope, third load scope increase gradually in proper order. Under different working conditions, the first load range, the second load range, and the third load range may change greatly, and need to be determined specifically according to actual conditions, for example, as follows:
when the parameters carried by the cantilever-type radial foil shaft are configured as: the number of the cantilever foils is M, and the opening angle of the cantilever foils isWherein M is a natural number. The thicknesses of the cantilever foil and the two layers of bubbling foils serving as the elastic supporting elements are both 0.1 mm, the materials of the cantilever foil and the two layers of bubbling foils serving as the elastic supporting elements are both beryllium bronze, and the bubbling heights of the two layers of bubbling foils are 0.2 mm; the bubbles of the two layers of bubble foils are arranged in a circumferential direction and in an axial direction, and 5 rows of bubbles are adopted in the axial direction,21 rows of bubbles were used in the circumferential direction. Under the working condition, the first load range is more than 0N and less than or equal to 5N, the second load range is more than 5N and less than or equal to 20N, and the third load range is more than 20N; wherein T is the load of the cantilever-type radial foil bearing; where N represents the force in newtons.
When the parameters carried by the cantilever-type radial foil shaft are configured as: the number of the cantilever foils is 4, and the opening angle of the cantilever foils is 120 degrees; the thicknesses of the cantilever foil and the two layers of bubbling foils serving as the elastic supporting elements are both 0.1 mm, the materials of the cantilever foil and the two layers of bubbling foils serving as the elastic supporting elements are both stainless steel, and the bubbling heights of the two layers of bubbling foils are 0.2 mm; the bubbles of the two layers of bubble foils are arranged in rows along the circumferential direction and are arranged in sequence along the axial direction, 5 rows of bubbles are adopted in the axial direction, and 21 rows of bubbles are adopted in the circumferential direction. Under the working condition, the first load range is more than 0N and less than or equal to 4N, the second load range is more than 4N and less than or equal to 15N, and the third load range is more than or equal to 15N.
When the parameters carried by the cantilever-type radial foil shaft are configured as: the number of the cantilever foils is 4, and the opening angle of the cantilever foils is 120 degrees; the thicknesses of the cantilever foil and the two layers of bubbling foils serving as the elastic supporting elements are both 0.15 mm, the materials of the cantilever foil and the two layers of bubbling foils serving as the elastic supporting elements are both beryllium bronze, and the bubbling heights of the two layers of bubbling foils are 0.2 mm; the bubbles of the two layers of bubble foils are arranged in rows along the circumferential direction and are arranged in sequence along the axial direction, 5 rows of bubbles are adopted in the axial direction, and 21 rows of bubbles are adopted in the circumferential direction. Under the working condition, the first load range is more than 0N and less than or equal to 8N, the second load range is more than 8N and less than or equal to 40N, and the third load range is more than or equal to 40N.
The above-mentioned different operating mode conditions's example, the partial condition in the experimental work condition only, the utility model discloses contain above-mentioned operating mode, but not limited to above-mentioned operating mode.
In the utility model, the cantilever foil and the elastic support element are made of beryllium bronze, stainless steel or nickel-based alloy. In practical applications, the materials of the cantilever foils and the elastic support element can be determined according to actual requirements.
The utility model discloses in, cantilever foil and elastic support element's extension direction with cantilever type radial foil bearing's axle direction of rotation is the same.
The utility model discloses in, elastic support element 2 is multilayer bubbling foil or ripples foil, and the thickness of multilayer bubbling foil is more than or equal to 0.05 millimeter, and the bubbling height of multilayer bubbling foil is more than or equal to 0.15 millimeter. Fig. 5(a) is a schematic structural view of the support member with equal height elasticity. Fig. 5(b) is a schematic structural view of the high elastic support member. As shown in fig. 5(a) and 5(b), in the present invention, the height of the elastic support element 2 is equal from the fixed end to the free end of the elastic support element 2; alternatively, the height of the elastic support element 2 is from low to high from the fixed end to the free end of the elastic support element 2.
In practical application, in the utility model discloses in cantilever type radial foil bearing still can be through the structural feature who changes elastic support component 2, optimize wedge clearance in the bearing to improve the bearing capacity of bearing, guarantee that the bearing has better stability and impact resistance, alleviate traditional cantilever type radial foil bearing foil wear problem under heavy load and impact load under big impact load. When the wave foil is adopted as the elastic supporting element, the changeable structural parameters comprise the thickness of the wave foil, the radius of the wave arch, the number of the wave arches in unit length, the angle of the wave arch and the like; when multiple layers of blister foils are used as the flexible support member, the structural parameters that may be varied include the thickness of the blister foil, the number of layers of blister foil, the number of blisters per unit area, the arrangement of the blisters in rows or columns, the shape of the blisters, the height of the blisters, etc.
In the utility model, the cantilever foil 3 and the elastic support element 2 are made of beryllium bronze, nickel-based alloy or stainless steel, and the thickness of the cantilever foil 3 is 0.05 mm. In practical application, the materials of the cantilever foils and the elastic supporting element can be determined according to actual requirements.
The utility model discloses in, the figure of cantilever foil 3 is 4, and cantilever foil 3's opening angle is 120.
In practical application, the elastic support elements corresponding to different clamping grooves can adopt different structural parameters to control the rigidity of the cantilever type radial foil bearing under large load, further optimize the wedge-shaped gap in the bearing to enlarge the bearing area, and further improve the bearing capacity of the bearing. Additionally, the utility model discloses in every draw-in groove can also correspond a plurality of elastic support component, the rigidity distribution through control elastic support component makes the structural rigidity of bearing have the characteristic that both ends rigidity is little and middle rigidity is big along the axial, further improves the bearing capacity of bearing. The characteristic that the rigidity of the two ends is small and the rigidity of the middle part is large can be realized by the following modes: when the elastic supporting element adopts the bump foil, the middle sheet of the bump foil in the axial direction can adopt a foil sheet with larger thickness or a mode that the number of bump arches in unit length is larger; when the elastic supporting element adopts a plurality of layers of bubbling foils, the middle area in the axial direction of the bubbling foils can adopt a mode of arranging more bubbling than the areas at two ends, different bubbling shapes or the thickness of the foils in the middle area is larger, and the like.
Experiments show that the cantilever type radial foil bearing with the shaft diameter of 25 mm adopts the double-layer bubbling foil as the elastic supporting element, and the main frequency amplitude of the cantilever type radial foil bearing is only about one third of that of the traditional cantilever type radial foil bearing under the same parameters under the conditions of the rotating speed of 80 kilorevolutions per minute and the load of 15N. This shows that the cantilever radial foil bearing of the present invention has better ability to dissipate the vortex energy and maintain the stable operation of the main shaft. Simultaneously, under 80 thousand revolutions per minute 80krpm rotational speed, the ultimate bearing capacity that cantilever type radial foil bearing surveyed improves about 30% than traditional cantilever type radial foil bearing under the same parameter.
In summary, the above is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. A cantilever-type radial foil bearing, comprising: the device comprises a bearing seat, more than three elastic supporting elements and more than three cantilever foils; wherein,
more than three axial clamping grooves are uniformly formed in the inner wall of the bearing seat along the circumferential direction, the number of the elastic supporting elements and the number of the cantilever foils are the same as the number of the clamping grooves, and one clamping groove corresponds to one elastic supporting element and one cantilever foil; sequentially installing corresponding elastic supporting elements and cantilever foils in the bearing seat from outside to inside, wherein one ends of the elastic supporting elements and one ends of the cantilever foils are used as fixed ends and are overlapped and fixed in corresponding clamping grooves through pins, the other ends of the elastic supporting elements and the other ends of the corresponding cantilever foils are used as free ends and are in a free state, and the other end of each cantilever foil is freely lapped on an adjacent cantilever foil along the circumferential direction; the elastic supporting element is attached to the inner wall of the bearing seat, the elastic supporting element is in line contact or surface contact with the corresponding cantilever foils, and adjacent cantilever foils are in segmented line contact or surface contact.
2. The cantilever-type radial foil bearing of claim 1, wherein the resilient support element is in line-or surface-contact with a corresponding cantilever foil, and adjacent cantilever foils are in segmented line-or surface-contact, in particular:
when the cantilever type radial foil bearing is in no-load, the elastic supporting element is in line contact with the corresponding cantilever foil close to the fixed end, the elastic supporting element is not in line contact with the other parts of the corresponding cantilever foil except the fixed end, and the adjacent cantilever foils are in line contact at the free lap joint;
when the load of the cantilever type radial foil bearing is in a first load range, the elastic supporting element is in line contact with the corresponding cantilever foil close to the fixed end, the elastic supporting element is not in line contact with the corresponding cantilever foil at the other parts except the fixed end, and the adjacent cantilever foils are in line contact at the extension lap joint part;
when the load T of the cantilever type radial foil bearing is in a second load range, the elastic supporting element is partially in surface contact with the corresponding cantilever foils from the fixed end, and the adjacent cantilever foils are partially in surface contact at the extension lap joint part;
when the load of the cantilever type radial foil bearing is in a third load range, the elastic supporting element is completely attached to the corresponding cantilever foil, and the adjacent cantilever foils are partially in surface contact at the extension lap joint part.
3. The cantilever-type radial foil bearing of claim 1 or 2, wherein the elastic support element is a multi-layer blister foil or a bump foil.
4. The cantilever-type radial foil bearing of claim 3, wherein the resilient support elements are of equal height from a fixed end to a free end of the resilient support elements.
5. The cantilever-type radial foil bearing of claim 3, wherein the height of the resilient support element is from low to high from a fixed end to a free end of the resilient support element.
6. The cantilever-type radial foil bearing of claim 1, wherein the cantilever foil and the resilient support element are beryllium bronze, nickel-based alloy, or stainless steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821343681.1U CN209724968U (en) | 2018-08-12 | 2018-08-12 | A kind of cantilever style radial foil bearing |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821343681.1U CN209724968U (en) | 2018-08-12 | 2018-08-12 | A kind of cantilever style radial foil bearing |
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| CN209724968U true CN209724968U (en) | 2019-12-03 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108916217A (en) * | 2018-08-12 | 2018-11-30 | 西安交通大学 | A kind of cantilever style radial foil bearing |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108916217A (en) * | 2018-08-12 | 2018-11-30 | 西安交通大学 | A kind of cantilever style radial foil bearing |
| CN108916217B (en) * | 2018-08-12 | 2024-09-06 | 西安交通大学 | Cantilever type radial foil bearing |
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