CN115076220B - Air bearing, rotor assembly, compressor and heating and ventilation equipment - Google Patents
Air bearing, rotor assembly, compressor and heating and ventilation equipment Download PDFInfo
- Publication number
- CN115076220B CN115076220B CN202210912656.5A CN202210912656A CN115076220B CN 115076220 B CN115076220 B CN 115076220B CN 202210912656 A CN202210912656 A CN 202210912656A CN 115076220 B CN115076220 B CN 115076220B
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- air bearing
- rotor
- wave
- corrugated
- wave band
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 11
- 238000009423 ventilation Methods 0.000 title claims abstract description 11
- 239000011888 foil Substances 0.000 claims abstract description 162
- 230000008093 supporting effect Effects 0.000 description 10
- 238000000034 method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 238000013016 damping Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C17/00—Sliding-contact bearings for exclusively rotary movement
- F16C17/02—Sliding-contact bearings for exclusively rotary movement for radial load only
- F16C17/024—Sliding-contact bearings for exclusively rotary movement for radial load only with flexible leaves to create hydrodynamic wedge, e.g. radial foil bearings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/05—Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
- F04D29/056—Bearings
- F04D29/057—Bearings hydrostatic; hydrodynamic
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C17/00—Sliding-contact bearings for exclusively rotary movement
- F16C17/04—Sliding-contact bearings for exclusively rotary movement for axial load only
- F16C17/042—Sliding-contact bearings for exclusively rotary movement for axial load only with flexible leaves to create hydrodynamic wedge, e.g. axial foil bearings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/02—Parts of sliding-contact bearings
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Support Of The Bearing (AREA)
Abstract
The invention discloses an air bearing, a rotor assembly, a compressor and heating ventilation equipment, wherein the air bearing comprises a mounting seat, a wave foil and a top foil which are sequentially laminated, the wave foil comprises corrugated sections, a first wave band and a second wave band are arranged on the same wave foil, and the protruding heights of the corrugated sections of the first wave band and the protruding heights of the protruding sections of the second wave band are different. According to the air bearing disclosed by the embodiment of the invention, the rotor is supported to different degrees, and the running stability and reliability of the rotor are ensured.
Description
Technical Field
The invention relates to the technical field of bearings, in particular to an air bearing, a rotor assembly comprising the air bearing, a compressor comprising the air bearing and heating ventilation equipment comprising the air bearing.
Background
The gas bearing in the related art cannot adjust rigidity according to the load condition, has poor supporting capability on the rotor, has poor running stability and low reliability.
Disclosure of Invention
An object of the present invention is to provide an air bearing, which supports the rotor to different degrees and ensures the stability and reliability of the operation of the rotor.
Another object of the present invention is to provide a rotor assembly including the aforementioned air bearing.
It is still another object of the present invention to provide a compressor including the air bearing or the rotor assembly.
It is still another object of the present invention to provide a heating and ventilation device, comprising the air bearing or the rotor assembly or the compressor.
According to the air bearing provided by the embodiment of the invention, the air bearing comprises the mounting seat, the corrugated foil and the top foil which are sequentially stacked, wherein the corrugated foil comprises corrugated sections, a first wave band and a second wave band are arranged on the same corrugated foil, and the protruding heights of the corrugated sections of the first wave band and the protruding heights of the corrugated sections of the second wave band are different.
According to the air bearing disclosed by the embodiment of the invention, the rotor is supported to different degrees, and the running stability and reliability of the rotor are ensured.
In addition, the air bearing according to the above embodiment of the present invention may further have the following additional technical features:
according to some embodiments of the invention, the first and second bands are arranged along a circumference of the air bearing.
In some embodiments, at least one of the first band and the second band includes a plurality of bands, and the first band and the second band are staggered in a circumferential direction of the air bearing.
In some embodiments, the bump heights of the corrugated segments on the corrugated foil vary uniformly along the circumference of the air bearing.
According to some embodiments of the invention, the first and second wave bands are arranged in a transverse direction having an included angle of greater than 0 ° and less than or equal to 90 ° with respect to both a circumferential direction of the air bearing and a direction from the mount to the top foil.
In some embodiments, at least one of the first band and the second band includes a plurality of bands, and the first band and the second band are staggered in the lateral direction.
In some embodiments, the bump heights of the corrugated segments on the corrugated foil vary uniformly along the transverse direction.
According to some embodiments of the invention, at least one of the first and second bands comprises a plurality of corrugated segments of the same height or at least two different heights.
According to some embodiments of the invention, a plurality of wave foils are arranged between the top foil and the mounting seat in a stacked manner, and at least one of the wave foils is provided with the first wave band and the second wave band.
In some embodiments, the corrugated segments of one of the two adjacent corrugated foils are stacked with the corrugated segments of the other.
In some embodiments, the corrugated foils further comprise a connecting section, the corrugated section of one of the adjacent two corrugated foils being opposite to the connecting section of the other.
Optionally, the air bearing is a radial air bearing or an axial air bearing.
The compressor comprises the air bearing.
According to an embodiment of the present invention, the rotor assembly includes a rotor, the rotor assembly further includes: the radial air bearing and/or the axial air bearing is sleeved on the periphery of the rotor, the radial air bearing is the air bearing according to the above, and the mounting seat, the corrugated foil and the top foil of the radial air bearing are sequentially laminated from outside to inside along the radial direction of the rotor; the axial air bearing is matched with the rotor, the axial air bearing is the air bearing, and the mounting seat, the corrugated foil and the top foil of the axial air bearing are sequentially stacked along the axial direction of the rotor.
The compressor comprises the air bearing; or include the aforementioned rotor assembly.
The heating and ventilation equipment comprises the air bearing; or a rotor assembly including the foregoing; or include the aforementioned compressors.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The foregoing and/or additional aspects and advantages of the invention will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:
Fig. 1 is a schematic structural view of an air bearing according to an embodiment of the present invention.
Fig. 2 is an enlarged view at a in fig. 1.
Fig. 3 is an enlarged view at B in fig. 1.
Fig. 4 is a schematic structural view of a wave foil according to an embodiment of the invention.
Fig. 5 is a top view of a wave foil according to an embodiment of the invention.
FIG. 6 is a schematic view of a rotor assembly according to one embodiment of the present invention.
Reference numerals: an air bearing 1, an axial air bearing 1a and a radial air bearing 1b;
Rotor assembly 10, rotor 11, mount 100;
a corrugated foil 200, a first corrugated foil 201, a second corrugated foil 202, a first wave band 210, a second wave band 220, a connecting segment 230, a corrugated segment 240;
Top foil 300;
A first fixing member 410 and a second fixing member 420.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.
An air bearing 1 according to an embodiment of the present invention is described below with reference to the drawings.
As shown in fig. 1 to 6, an air bearing 1 according to an embodiment of the present invention includes a mount 100, a wave foil 200, and a top foil 300.
The mounting base 100, the corrugated foil 200 and the top foil 300 are sequentially stacked, specifically, the air bearing 1 can support the rotor 11 to ensure that the rotor 11 can smoothly rotate, when the rotor 11 rotates, the rotor 11 contacts with the top foil 300, and the rotor 11 has an extrusion effect on the corrugated foil 200. In other words, when the rotor 11 rotates, the wave foil 200 has a supporting effect on the rotor 11 to ensure that the rotor 11 can smoothly rotate.
In some embodiments, as shown in fig. 1, the wave foil 200 is disposed inside the mount 100 and the top foil 300 is disposed inside the wave foil 200.
The corrugated foil 200 includes corrugated sections 240, the same corrugated foil 200 has a first wave band 210 and a second wave band 220, and the protruding heights of the corrugated sections 240 of the first wave band 210 and the protruding heights of the corrugated sections 240 of the second wave band 220 are different, so that the corrugated foil 200 can support the rotor 11 to different degrees, and further the rotor 11 can rotate stably at different rotation speeds.
In some embodiments, the height of the protrusions of the corrugated section 240 of the second wave band 220 is higher than the height of the protrusions of the corrugated section 240 of the first wave band 210, when the rotor 11 rotates at a low speed, the impact force of the rotor 11 on the air bearing 1 is small, and at this time, the corrugated section 240 of the second wave band 220 can support the rotor 11, so that the rotor 11 can smoothly rotate at a low speed.
The protrusion height of the present invention refers to a height of the corresponding structure relative to a connection line between two ends of the corresponding structure, for example, as shown in fig. 2, the middle portion of the corrugated section 201 protrudes toward the top foil 300, a point of the corrugated section 201 closest to the top foil 300 is an apex, and the protrusion height of the corrugated section 201 refers to a height of the apex of the corrugated section 201 relative to the connection between two ends of the corrugated section 201.
When only the corrugated section 240 of the second band 220 supports the rotor 11, the corrugated section 240 of the second band 220 is easily deformed to dissipate the ineffective energy such as vibration generated when the rotor 11 rotates, thereby ensuring that the rotor 11 can rotate stably. At the same time, this facilitates reduction of noise generated when the rotor 11 rotates.
When the rotation speed of the rotor 11 is higher, the impact force of the rotor 11 on the air bearing 1 is larger, at this time, the impact force of the rotor 11 on the second wave band 220 is larger, the second wave band 220 will deform after receiving the impact force, at this time, the corrugated segment 240 of the first wave band 210 and the corrugated segment 240 of the second wave band 220 can support the rotor 11 at the same time, so as to provide larger supporting force for the rotor 11, and make the rotor 11 smoothly rotate at high speed.
When the corrugated section 240 of the first wave band 210 and the corrugated section 240 of the second wave band 220 support the rotor 11 together, the supporting rigidity of the corrugated foil 200 on the rotor 11 is high, the corrugated foil 200 is difficult to collapse or deform irreversibly by the rotor 11, and the corrugated foil 200 can provide strong supporting force specially, so that the rotor 11 moves along the same path, thus being convenient for improving the critical rotation speed of the rotor 11, and ensuring the stability and the shock resistance of the rotor 11 in high-speed rotation.
According to the air bearing 1 provided by the embodiment of the invention, the rotor 11 can be supported to different degrees according to the load condition of the rotor 11 on the air bearing 1 by the corrugated sections 240 with different protrusion heights, so that the rotor 11 can be ensured to rotate stably at different rotation speeds.
Therefore, the air bearing 1 according to the embodiment of the invention supports the rotor 11 to different degrees, and ensures the stability and reliability of the operation of the rotor 11.
An air bearing 1 according to an embodiment of the present invention is described below with reference to the accompanying drawings.
As shown in fig. 1 to 6, an air bearing 1 according to an embodiment of the present invention includes a mount 100, a wave foil 200, and a top foil 300.
In some embodiments of the present invention, as shown in fig. 1 and 3, the air bearing 1 further includes a first fixing member 410 and a second fixing member 420, where the first fixing member 410 can fix the position of the wave foil 200 to fix the wave foil 200 to the mount 100, and the second fixing member 420 can fix the position of the top foil 300 to fix the top foil 300 to the mount 100.
The first fixing member 410 and the second fixing member 420 may be fixing members such as pins, screws, and the like.
In some embodiments of the present invention, the first wave band 210 and the second wave band 220 are arranged along the circumferential direction of the air bearing 1, so that the first wave band 210 and the second wave band 220 are reasonably arranged on the air bearing 1, and the first wave band 210 and the second wave band 220 can support the rotor 11.
Specifically, the first wave band 210 and the second wave band 220 are arranged along the circumferential direction of the air bearing 1, so that the first wave band 210 and the second wave band 220 are arranged around the rotor 11, and when the rotor 11 rotates relative to the air bearing 1, the first wave band 210 and/or the second wave band 220 can support the rotor 11, so that the rotor 11 can rotate stably.
In some alternative embodiments of the present invention, at least one of the first and second wave bands 210 and 220 includes a plurality of wave bands, and the first and second wave bands 210 and 220 are staggered in the circumferential direction of the air bearing 1 so as to uniformly arrange the first and second wave bands 210 and 220 in the circumferential direction of the air bearing 1, so that the first and second wave bands 210 and 220 can stably support the rotor 11.
In some embodiments, when the rotor 11 eccentrically rotates relative to the air bearing 1, the rotor 11 extrudes the first wave band 210 and the second wave band 220 located at different positions in the circumferential direction of the air bearing 1, so that the first wave ends and the second wave bands 220 are staggered in the circumferential direction of the air bearing 1, and the first wave band 210 and/or the second wave band 220 located at different positions can correspondingly support the rotor 11 when the rotor 11 eccentrically rotates relative to the air bearing 1, so as to ensure that the rotor 11 can stably rotate.
In some implementations, the protrusion height of the second band 220 is higher than the protrusion height of the first band 210, and the second band 220 at the corresponding position can support the rotor 11 when the rotor 11 rotates at a low speed, and the first band 210 and the second band 220 at the corresponding position can simultaneously support the rotor 11 when the rotor 11 rotates at a high speed.
In some alternative embodiments of the present invention, the height of the protrusions of the corrugated sections 240 on the corrugated foil 200 varies uniformly along the circumferential direction of the air bearing 1, so that the corrugated sections 240 can stably and uniformly support the rotor 11, and the situation that the heights of the protrusions of two adjacent corrugated sections 240 differ too much and influence the rotation of the rotor 11 is avoided.
In some embodiments of the present invention, the first wave band 210 and the second wave band 220 are arranged along a transverse direction, and an included angle between the transverse direction and the circumferential direction of the air bearing 1 is greater than 0 ° and less than or equal to 90 °, so that the first wave band 210 and the second wave band 220 are uniformly arranged on the air bearing 1, and the first wave band 210 and/or the second wave band 220 can uniformly support the rotor 11.
In some embodiments, the angle between the lateral direction and the circumferential direction of the air bearing 1 is 30 °, 60 ° or 90 °.
In other embodiments, the transverse direction forms an angle greater than 0 ° and less than or equal to 90 ° with the direction from the mounting base 100 to the top foil 300, so that the first wave band 210 and the second wave band 220 are uniformly arranged on the air bearing 1, and the first wave band 210 and/or the second wave band 220 can uniformly support the rotor 11.
In some embodiments, the angle between the lateral direction and the direction from the mount 100 to the top foil 300 is 30 °, 60 °, or 90 °.
In some alternative embodiments of the present invention, at least one of the first wave band 210 and the second wave band 220 includes a plurality of wave bands, and the first wave band 210 and the second wave band 220 are staggered in a lateral direction so as to uniformly arrange the first wave band 210 and the second wave band 220 on the air bearing 1, so that when the rotor 11 rotates at a low speed, one of the first wave band 210 and the second wave band 220 with a larger protrusion height can support the rotor 11, and when the rotor 11 rotates at a high speed, the first wave band 210 and the second wave band 220 jointly support the rotor 11, so as to ensure that the rotor 11 can rotate stably.
In some alternative embodiments of the present invention, the height of the protrusions of the corrugated sections 240 on the corrugated foil 200 is uniformly changed in the transverse direction, so that the corrugated sections 240 can uniformly support the rotor 11, and the situation that the difference between the heights of the protrusions of two adjacent corrugated sections 240 is too large to affect the rotation of the rotor 11 is avoided.
In some embodiments, the wave foil 200 has a plurality of first wave bands 210 and second wave bands 220, where the number of the first wave bands 210 and the second wave bands 220 is the same, and the first wave bands 210 and the second wave bands 220 are arranged in a staggered manner in a transverse direction, so that the heights of the protrusions of the wave segments 240 on the wave foil 200 are uniformly changed in the transverse direction, so that the first wave bands 210 and the second wave bands 220 can uniformly support the rotor 11, and the influence on the rotation of the rotor 11 caused by too large difference between the heights of the protrusions of two adjacent wave segments 240 is avoided.
In some embodiments of the present invention, at least one of the first band 210 and the second band 220 includes a plurality of wave segments 240 having the same height or at least two different heights to support the rotor 11 with the plurality of wave segments 240.
In some embodiments, the first wave band 210 has a plurality of wave segments 240 with the same height, the second wave band 220 has a plurality of wave segments 240 with the same height, the convex height of the wave segments 240 of the second wave band 220 is larger than the convex height of the wave segments 240 of the first wave band 210, and when the rotor 11 rotates eccentrically at a low speed relative to the air bearing 1, the wave segments 240 at corresponding positions on the second wave band 220 can support the rotor 11, so as to ensure that the rotor 11 can rotate eccentrically at a low speed stably.
When the rotor 11 rotates eccentrically at a high speed, the corrugated section 240 at the corresponding position on the second band 220 is deformed, and at this time, the corrugated section 240 at the corresponding position on the first band 210 and the corrugated section 240 at the corresponding position on the second band 220 can support the rotor 11 together, so that the rotor 11 can rotate eccentrically at a high speed stably.
In other embodiments, the first band 210 has two different height wave segments 240, the two different height wave segments 240 are staggered over the first band 210, and the second band 220 also has two different height wave segments 240, the two different height wave segments 240 are staggered over the second band 220.
In still other embodiments, the first band 210 has a plurality of corrugated segments 240 of the same height and the second band 220 has a plurality of corrugated segments 240 of different heights. Of course, the second band 220 may have a plurality of corrugated sections 240 having the same height, and the first band 210 may have a plurality of corrugated sections 240 having different heights.
In some embodiments of the present invention, a plurality of wave foils 200 are stacked between the top foil 300 and the mounting base 100 to support the rotor 11 by using the plurality of wave foils 200, so that the support rigidity of the air bearing 1 to the rotor 11 is increased, and the rotor 11 can rotate stably.
Wherein, at least one of the plurality of wave foils 200 is provided with a first wave band 210 and a second wave band 220, so as to ensure that the plurality of wave foils 200 can adapt to loads of different degrees on the wave foils 200 when the rotor 11 rotates at a low speed and rotates at a high speed, and ensure that the wave foils 200 can smoothly support the rotor 11 to rotate.
In some embodiments, as shown in fig. 1 and 2, two corrugated foils 200, a first corrugated foil 201 and a second corrugated foil 202, respectively, are stacked between the top foil 300 and the mounting base 100, the second corrugated foil 202 being disposed adjacent to the top foil 300, and the first corrugated foil 201 being disposed adjacent to the mounting base 100.
In some examples, the second wave foil 202 has a first wave band 210 and a second wave band 220, the second wave band 220 having a protrusion height greater than the protrusion height of the first wave band 210, when the rotor 11 rotates at a low speed, the pressing force of the rotor 11 against the wave foil 200 is small, and the second wave band 220 on the second wave foil 202 supports the rotor 11. When the rotor 11 rotates at an increased speed and the second wave band 220 on the second wave foil 202 is deformed, the first wave band 210 and the second wave band 220 on the second wave foil 202 can jointly support the rotor 11.
When the rotation speed of the rotor 11 continues to increase, the first wave foil 201 and the second wave foil 202 support the rotor 11 together when the extrusion force of the rotor 11 to the second wave foil 202 increases to deform both the first wave band 210 and the second wave band 220 on the second wave foil 202, so that the rotor 11 can rotate stably at different rotation speeds.
In some alternative embodiments of the present invention, as shown in fig. 1 and 2, the corrugated section 240 of one of the two adjacent corrugated foils 200 is stacked with the corrugated section 240 of the other corrugated foil, so that the corrugated section 240 is convenient to reduce the occupied space while ensuring that the corrugated foils 200 can support the rotor 11, and the layout of the mounting seat 100, the plurality of corrugated foils 200 and the top foil 300 in the air bearing 1 is facilitated.
In addition, the corrugated section 240 of one of the two corrugated foils 200 is laminated with the corrugated section 240 of the other corrugated foil, and when the corrugated section 240 close to the rotor 11 is deformed, the other corrugated section 240 can timely support the rotor 11, so that the rotor 11 is prevented from excessively large rotation deviation during rotation, and stable rotation of the rotor 11 is ensured.
In some embodiments of the invention, the lobe height of the lobe 240 proximate to the rotor 11 is 0.03mm to 0.12mm greater than the lobe height of the lobe 240 distal to the rotor 11.
For example, the height of the protrusions of the corrugated section 240 close to the rotor 11 is 0.03mm, 0.06mm, 0.09mm or 0.12mm higher than the height of the protrusions of the corrugated section 240 far from the rotor 11.
In some alternative embodiments of the present invention, the corrugated foil 200 further includes a connection section 230, where the connection section 230 is capable of connecting a plurality of corrugated sections 240 on the corrugated foil 200 together to form an integral corrugated foil 200, so as to facilitate increasing the deformation resistance of the corrugated foil 200 and thus the supporting force of the corrugated foil 200 on the rotor 11.
Wherein the corrugated section 240 of one of the two adjacent corrugated foils 200 is opposite to the connecting section 230 of the other.
The air bearing 1 in the embodiment of the invention may be an axial air bearing 1a or a radial air bearing 1b.
Taking the axial air bearing 1a as an example, the mounting base 100, the wave foil 200 and the top foil 300 are stacked in the axial direction.
In addition, taking the radial air bearing 1b as an example, the mounting seat 100, the wave foil 200 and the top foil 300 are sleeved from outside to inside in the radial direction, in the use process of the radial air bearing 1b, the rotor 11 can be sleeved on the inner side of the top foil 300, in the rotation process of the rotor 11, the top foil 300 is forced to displace towards the mounting seat 100, and an air film is formed between the rotor 11 and the top foil 300, and by utilizing the supporting effect of the wave foil 200, the dynamic balance of the air film between the rotor 11 and the top foil 200 can be realized, so that the stability of the rotor 11 in the rotation process is improved.
As shown in fig. 6, the present invention further provides a rotor assembly 10, and the rotor assembly 10 according to the embodiment of the present invention includes a rotor 11 and the air bearing 1 in the foregoing embodiment. By providing the air bearing 1 as described above, stability in the operation of the rotor assembly 10 can be improved, and damping in the rotation of the rotor 11 can be reduced.
The rotor assembly 10 may include a radial air bearing 1b, where the radial air bearing 1b is sleeved on the outer periphery of the rotor 11, the radial air bearing 1b is the air bearing 1 according to the foregoing embodiment, and the mount 100, the wave foil 200, and the top foil 300 of the radial air bearing 1b are sequentially stacked from outside to inside along the radial direction of the rotor 11. During use, the top foil 300 is pushed to move towards the mounting base 100 during rotation of the rotor assembly 10, and an air film is formed on the surface of the top foil 300, and the top foil 300 is forced to expand outwards and press against the corrugated foil 200, and in addition, the corrugated foil 200 provides support for the top foil 300 so that a proper distance is provided between the corrugated foil 200 and the rotor 11 to maintain the stability of the air film between the top foil 300 and the rotor 11. Meanwhile, the stable rotation of the rotor 11 can be maintained, and the radial movement of the rotor 11 is reduced.
In addition, the rotor assembly 10 may further include an axial air bearing 1a, where the axial air bearing 1a is matched with the rotor 11, and the axial air bearing 1a is the air bearing 1 according to the foregoing embodiment, and the mount 100, the wave foil 200, and the top foil 300 of the axial air bearing 1a are sequentially stacked along the axial direction of the rotor 11. During use, the top foil 300 is pushed to move towards the mounting base 100 and an air film is formed on the surface of the top foil 300 during rotation of the rotor assembly 10, the top foil 300 is pressed against the corrugated foil 200, and the corrugated foil 200 provides support for the top foil 300 so that a proper distance is provided between the corrugated foil 200 and the rotor 11 to maintain the stability of the air film between the top foil 300 and the rotor 11.
The invention also provides a compressor which comprises the air bearing 1.
The present invention also provides a compressor comprising the rotor assembly 10 as described above.
The invention also provides heating and ventilation equipment which comprises the air bearing 1.
The present invention also provides a heating and ventilation apparatus comprising the rotor assembly 10 as described above.
The invention also provides heating and ventilation equipment which comprises the compressor.
The invention provides an air bearing 1, a rotor assembly 10, a compressor and heating and ventilation equipment of the air bearing 1, wherein a gap is formed between the wave crest of a corrugated section 240 of a first corrugated foil 201 and the wave crest of a corrugated section 240 of a second corrugated foil 202 of the air bearing 1; only one of the first corrugated foil 201 and the second corrugated foil 202 supports during light load, at the moment, the single-layer corrugated foil 200 supports the corrugated foil 200 to be easy to deform, the structural damping is high, energy brought by vibration of the rotor 11 can be well dissipated, and the stability of the rotor 11 is ensured; when heavy load or impact is applied, the wave heights of the wave sections 240 and 240 of the first wave foil 201 and the second wave foil 202 are consistent, and the wave heights are supported by the wave sections 240 and 240 of the first wave foil 201 and the wave sections 240 of the second wave foil 202 together, so that high supporting rigidity can be realized, the wave foil 200 is prevented from being collapsed and irreversibly deformed, the critical rotation speed of the rotor 11 can be improved, and the stability and the impact resistance of the rotor 11 in high-speed operation can be ensured.
The air bearing 1 of the embodiment of the present invention may be an axial bearing or a radial bearing, and taking an axial bearing as an example, the mounting seat 100, the wave foil 200 and the top foil 300 are stacked in the axial direction. Taking radial bearings as an example, the mounting seat 100, the corrugated foil 200 and the top foil 300 are sleeved from outside to inside in the radial direction, in the use process of the radial bearings, the rotor 11 can be sleeved on the inner side of the top foil 300, in the rotation process of the rotor 11, the top foil 300 is forced to displace towards the mounting seat 100, an air film is formed between the rotor 11 and the top foil 300, and the dynamic balance of the air film between the rotor 11 and the top foil 300 can be realized by utilizing the supporting function of the corrugated foil 200, so that the stability of the rotor 11 in the rotation process is improved. In addition, by misplacing the corrugated section 240 of the first corrugated foil 201 and the corrugated section 240 of the second corrugated foil 202, the uniformity and stability of supporting the top foil 300 by the first corrugated foil 201 and the second corrugated foil 202 can be improved, and thus the load capacity of the air bearing 1 is improved.
Other constructions and operations of compressors according to embodiments of the present invention are known to those of ordinary skill in the art and will not be described in detail herein.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention. Furthermore, features defining "first", "second" may include one or more such features, either explicitly or implicitly. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more. In the description of the invention, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, and may also include the first and second features not being in direct contact but being in contact with each other by another feature therebetween.
In the description of the invention, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the invention, the scope of which is defined by the claims and their equivalents.
Claims (8)
1. The air bearing is characterized by comprising a mounting seat, a corrugated foil and a top foil which are sequentially laminated, wherein the corrugated foil comprises corrugated sections, a first wave band and a second wave band are arranged on the same corrugated foil, and the protruding heights of the corrugated sections of the first wave band and the protruding heights of the corrugated sections of the second wave band are different;
The first wave band and the second wave band are arranged along the transverse direction, and the transverse direction and the circumferential direction of the air bearing and the direction from the mounting seat to the top foil are both provided with an included angle of 90 degrees;
At least one of the first wave band and the second wave band comprises a plurality of wave bands, the number of the first wave band and the number of the second wave band are the same, the first wave band and the second wave band are staggered in the transverse direction, the first wave band is provided with two wave bands with different heights and is staggered on the first wave band, and the second wave band is also provided with two wave bands with different heights and is staggered on the second wave band;
a plurality of wave foils are arranged between the top foil and the mounting seat in a laminated mode, and at least one of the wave foils is provided with a first wave band and a second wave band.
2. The air bearing of claim 1, wherein at least one of the first band and the second band comprises a plurality of bellows segments having the same height or at least two different heights.
3. An air bearing according to claim 1, wherein the corrugated segments of one of the two adjacent foils are laminated with the corrugated segments of the other.
4. The air bearing of claim 1, wherein the wave foils further comprise a connecting section, the corrugated section of one of the adjacent two wave foils being opposite the connecting section of the other.
5. The air bearing of claim 1, wherein the air bearing is a radial air bearing or an axial air bearing.
6. A rotor assembly comprising a rotor, the rotor assembly further comprising:
The radial air bearing is sleeved on the periphery of the rotor, the radial air bearing is an air bearing according to any one of claims 1-4, and the mounting seat, the corrugated foil and the top foil of the radial air bearing are sequentially laminated from outside to inside along the radial direction of the rotor; and/or
An axial air bearing, the axial air bearing cooperates with the rotor, the axial air bearing is an air bearing according to any one of claims 1-4, and the mounting base, the corrugated foil and the top foil of the axial air bearing are sequentially stacked along the axial direction of the rotor.
7. A compressor comprising an air bearing according to any one of claims 1-5.
8. A heating ventilation apparatus comprising an air bearing according to any one of claims 1 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210912656.5A CN115076220B (en) | 2022-07-30 | 2022-07-30 | Air bearing, rotor assembly, compressor and heating and ventilation equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210912656.5A CN115076220B (en) | 2022-07-30 | 2022-07-30 | Air bearing, rotor assembly, compressor and heating and ventilation equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115076220A CN115076220A (en) | 2022-09-20 |
| CN115076220B true CN115076220B (en) | 2024-04-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210912656.5A Active CN115076220B (en) | 2022-07-30 | 2022-07-30 | Air bearing, rotor assembly, compressor and heating and ventilation equipment |
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| CN (1) | CN115076220B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115076221B (en) * | 2022-07-30 | 2024-02-23 | 广东美的暖通设备有限公司 | Air bearing, rotor assembly, compressor and heating and ventilation equipment |
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| US5902049A (en) * | 1997-03-28 | 1999-05-11 | Mohawk Innovative Technology, Inc. | High load capacity compliant foil hydrodynamic journal bearing |
| CN211398265U (en) * | 2020-01-09 | 2020-09-01 | 珠海格力电器股份有限公司 | Radial gas bearing, compressor and air conditioning unit |
| CN212079928U (en) * | 2020-05-15 | 2020-12-04 | 擎能动力科技(苏州)有限公司 | Air foil radial bearing based on hierarchical deformation |
| JP2020197287A (en) * | 2019-06-05 | 2020-12-10 | トヨタ紡織株式会社 | Dynamic pressure air bearing |
| CN113513531A (en) * | 2021-08-12 | 2021-10-19 | 珠海格力电器股份有限公司 | Gas thrust bearing, bearing assembly, compressor, air conditioner and automobile |
| CN113719530A (en) * | 2021-09-30 | 2021-11-30 | 珠海格力电器股份有限公司 | Gas thrust bearing, compressor and air conditioning system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100573384B1 (en) * | 2004-02-14 | 2006-04-25 | 한국터보기계(주) | Radial Foil Bearing |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5584582A (en) * | 1994-12-15 | 1996-12-17 | Air Products And Chemicals, Inc. | Bump foil design for improved damping and load capacity from compliant foil gas bearings |
| US5902049A (en) * | 1997-03-28 | 1999-05-11 | Mohawk Innovative Technology, Inc. | High load capacity compliant foil hydrodynamic journal bearing |
| JP2020197287A (en) * | 2019-06-05 | 2020-12-10 | トヨタ紡織株式会社 | Dynamic pressure air bearing |
| CN211398265U (en) * | 2020-01-09 | 2020-09-01 | 珠海格力电器股份有限公司 | Radial gas bearing, compressor and air conditioning unit |
| CN212079928U (en) * | 2020-05-15 | 2020-12-04 | 擎能动力科技(苏州)有限公司 | Air foil radial bearing based on hierarchical deformation |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN115076220A (en) | 2022-09-20 |
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