CN115296467A - Gas bearing, motor and high-speed rotating equipment - Google Patents
Gas bearing, motor and high-speed rotating equipment Download PDFInfo
- Publication number
- CN115296467A CN115296467A CN202210933465.7A CN202210933465A CN115296467A CN 115296467 A CN115296467 A CN 115296467A CN 202210933465 A CN202210933465 A CN 202210933465A CN 115296467 A CN115296467 A CN 115296467A
- Authority
- CN
- China
- Prior art keywords
- mounting hole
- foil
- groove
- shaft sleeve
- folded edge
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
- H02K5/167—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using sliding-contact or spherical cap bearings
-
- 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
- F16C32/00—Bearings not otherwise provided for
- F16C32/06—Bearings not otherwise provided for with moving member supported by a fluid cushion formed, at least to a large extent, otherwise than by movement of the shaft, e.g. hydrostatic air-cushion bearings
- F16C32/0603—Bearings not otherwise provided for with moving member supported by a fluid cushion formed, at least to a large extent, otherwise than by movement of the shaft, e.g. hydrostatic air-cushion bearings supported by a gas cushion, e.g. an air cushion
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
Abstract
The invention discloses a gas bearing, a motor and high-speed rotating equipment, and belongs to the technical field of bearings, wherein the gas bearing comprises a shaft sleeve, a top foil and a wave foil, a first clamping groove and a second clamping groove are arranged on the inner peripheral wall of the shaft sleeve, a first mounting hole and a second mounting hole are arranged on the end surface of the shaft sleeve, the first clamping groove, the second clamping groove, the first mounting hole and the second mounting hole penetrate through the shaft sleeve along the axial direction of the shaft sleeve, the first mounting hole is communicated with the first clamping groove, the second mounting hole is communicated with the second clamping groove, and a first bolt is inserted into the first mounting hole to fix a first folded edge and a third folded edge in the first clamping groove; utilize the second bolt to insert in the second mounting hole, can fix second hem and fourth hem in first draw-in groove to the both ends that make top paper tinsel and ripples paper tinsel are all fixed in the axle sleeve, and the rotor shaft can realize two-way rotation, avoids appearing the phenomenon of rotor locking, is applicable to products such as two-way rotatory high-speed motor, and application scope is wider.
Description
Technical Field
The invention relates to the technical field of bearings, in particular to a gas bearing, a motor and high-speed rotating equipment.
Background
In the related art, one end of the bump foil and the top foil in the radial gas bearing is fixed, the other end is a free end, the rotation direction of the rotor shaft in the air bearing is fixed, the rotor shaft can only turn from the free end to the fixed end of the foil, and when the rotor shaft rotates in the opposite direction, the rotor shaft is tightly held by the foil and cannot rotate, so that the rotor is clamped.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides the gas bearing, the two ends of the top foil and the wave foil are fixed, so that the rotor shaft supported by the gas bearing can rotate in two directions, and the application range is wider.
The embodiment of the invention also provides a motor comprising the gas bearing and high-speed rotating equipment.
A gas bearing according to an embodiment of the first aspect of the invention comprises: the shaft sleeve is provided with a shaft hole, the inner peripheral wall of the shaft sleeve is provided with a first clamping groove and a second clamping groove, the end face of the shaft sleeve is provided with a first mounting hole and a second mounting hole, the first clamping groove, the second clamping groove, the first mounting hole and the second mounting hole all extend from one end to the other end of the shaft sleeve, the first mounting hole is communicated with the first clamping groove, and the second mounting hole is communicated with the second clamping groove; the top foil is arranged in the shaft hole in a surrounding mode, a first folded edge is formed at one end of the top foil along the circumferential direction of the shaft sleeve, a second folded edge is formed at the other end of the top foil, the first folded edge is embedded into the first clamping groove, and the second folded edge is embedded into the second clamping groove; the corrugated foil is arranged in the shaft hole in a surrounding mode, the corrugated foil is nested between the shaft sleeve and the top foil, a third folded edge is formed at one end of the corrugated foil along the circumferential direction of the shaft sleeve, a fourth folded edge is formed at the other end of the corrugated foil, the third folded edge is embedded into the first clamping groove, and the fourth folded edge is embedded into the second clamping groove; the first bolt is inserted into the first mounting hole to fix the first folded edge and the third folded edge, and the second bolt is inserted into the second mounting hole to fix the second folded edge and the fourth folded edge.
The gas bearing provided by the embodiment of the invention has at least the following beneficial effects:
the gas bearing is characterized in that a first clamping groove and a second clamping groove are formed in the inner peripheral wall of the shaft sleeve, a first mounting hole and a second mounting hole are formed in the end face of the shaft sleeve, and the first clamping groove, the second clamping groove, the first mounting hole and the second mounting hole penetrate through the shaft sleeve along the axial direction of the shaft sleeve, so that the first mounting hole is communicated with the first clamping groove, and the second mounting hole is communicated with the second clamping groove; arranging a top foil and a wave foil in the shaft hole, wherein the wave foil is positioned between the shaft sleeve and the top foil, embedding a first folded edge of the top foil and a third folded edge of the wave foil into the first clamping groove, and embedding a second folded edge of the top foil and a fourth folded edge of the wave foil into the second clamping groove; the first bolt is inserted into the first mounting hole, so that the first folded edge and the third folded edge can be fixed in the first clamping groove; the second bolt is inserted into the second mounting hole, and the second folded edge and the fourth folded edge can be fixed in the first clamping groove, so that two ends of the top foil and the wave foil are fixed in the shaft sleeve, and the structure is stable and reliable; when the rotor shaft is supported by the gas bearing of the embodiment, the rotor shaft can rotate clockwise or anticlockwise, so that bidirectional rotation can be realized, and the phenomenon of locking of the rotor is avoided; and top foil or ripples foil damage back, only need take off first bolt and second bolt and can change top foil or ripples foil, axle sleeve reuse, use cost is low, is applicable to products such as two-way rotatory high-speed motor, and application scope is wider.
According to some embodiments of the invention, the first clamping groove comprises a first groove body and a second groove body which are connected in the radial direction of the shaft sleeve, the first groove body is obliquely arranged from the inner peripheral wall of the shaft sleeve to the second groove body, the first folding edge is provided with a first folding section matched with the first groove body, and the third folding edge is provided with a second folding section matched with the first groove body.
According to some embodiments of the invention, the inclination angle of the first groove body relative to the radial direction of the shaft sleeve is α, which satisfies: alpha is more than or equal to 40 degrees and less than or equal to 50 degrees.
According to some embodiments of the invention, the second clamping groove comprises a third groove body and a fourth groove body which are connected in the radial direction of the shaft sleeve, the third groove body is arranged in an inclined manner from the inner peripheral wall of the shaft sleeve to the fourth groove body, the second folded edge is provided with a third folded section matched with the third groove body, and the fourth folded edge is provided with a fourth folded section matched with the third groove body.
According to some embodiments of the invention, the third groove body is inclined at an angle β with respect to the radial direction of the bushing, and satisfies the following relation: beta is more than or equal to 40 degrees and less than or equal to 50 degrees.
According to some embodiments of the invention, the second groove body and the fourth groove body extend in a radial direction of the shaft sleeve, the first mounting hole is located on one side of the second groove body, and the second mounting hole is located on one side of the fourth groove body.
According to some embodiments of the invention, the width of each of the first and second card slots is greater than or equal to the sum of the thicknesses of the top foil and the wave foil.
According to some embodiments of the invention, a width of the first mounting hole is greater than a width of the first card slot; the width of the second mounting hole is larger than that of the second clamping groove.
According to some embodiments of the invention, the first and second mounting holes are circular holes, the first pin is in interference fit with the first mounting hole, and the second pin is in interference fit with the second mounting hole.
According to some embodiments of the invention, the thickness of each of the top foil and the wave foil is less than or equal to 0.5mm.
According to some embodiments of the invention, the inner circumferential wall of the top foil is provided with a wear resistant coating.
According to some embodiments of the present invention, the top foil and the bump foil cooperate to form a plurality of foil units, the plurality of foil units are distributed in the shaft hole along a circumferential direction of the shaft sleeve, the shaft sleeve is provided with a plurality of first clamping grooves, a plurality of second clamping grooves, a plurality of first mounting holes and a plurality of second mounting holes, each of the first pins and the second pins is provided with a plurality of first slots, the first folded edge and the third folded edge of each foil unit are embedded in the corresponding first clamping groove, and each first pin is inserted in the corresponding first mounting hole; the second folded edge and the fourth folded edge in each foil unit are embedded into the corresponding second clamping grooves, and each second bolt is inserted into the corresponding second mounting hole.
An electrical machine according to an embodiment of the second aspect of the present invention comprises a gas bearing according to the embodiment of the first aspect.
The motor provided by the embodiment of the invention has at least the following beneficial effects:
the motor adopts the gas bearing of the embodiment to support the rotor shaft, so that the rotor shaft can rotate clockwise or anticlockwise, bidirectional rotation can be realized, and the phenomenon of locking of the rotor is avoided; and top foil or ripples foil damage back, only need take off first bolt and second bolt and can change top foil or ripples foil, axle sleeve reuse, use cost is low, is applicable to high-speed rotating equipment such as air compressor machine, compressor, and application scope is wider.
A high-speed rotation apparatus according to an embodiment of a third aspect of the present invention includes the motor of the embodiment of the second aspect described above.
The high-speed rotating equipment adopts all the technical solutions of the motor of the above embodiments, and therefore has at least all the advantages brought by the technical solutions of the above embodiments.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the invention.
Drawings
The invention is further described with reference to the following figures and examples, in which:
FIG. 1 is a schematic perspective view of a gas bearing according to an embodiment of the present invention;
FIG. 2 is an exploded view of a gas bearing according to an embodiment of the present invention;
FIG. 3 is an enlarged schematic view of the structure at A in FIG. 1;
FIG. 4 is a schematic perspective view of a bushing in accordance with an embodiment of the present invention;
FIG. 5 is a schematic perspective view of a top foil according to an embodiment of the present invention;
fig. 6 is a schematic perspective view of a bump foil according to an embodiment of the present invention.
Reference numerals are as follows:
a shaft sleeve 100; a shaft hole 110; a first card slot 120; a first tank 121; a second trough 122; a second card slot 130; a third tank 131; a fourth groove 132; a first mounting hole 140; a second mounting hole 150;
a top foil 200; a first fold 210; a first bend section 211; a second flange 220; a third bent section 221;
a bump foil 300; a third fold edge 310; a second bending section 311; a fourth folded edge 320; the fourth bending section 321; a corrugated structure 330;
a first pin 400;
a second latch 500;
the gas bearing 1000.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it should be understood that the orientation or positional relationship referred to, for example, the upper, lower, etc., is indicated based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, but does not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.
In the description of the present invention, a plurality means two or more. If there is a description of first and second for the purpose of distinguishing technical features only, this is not to be understood as indicating or implying a relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of technical features indicated.
In the description of the present invention, it should be noted that the terms such as setting, installing, connecting, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the terms in the present invention by combining the specific contents of the technical solutions.
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is obvious that the embodiments described below are some, not all embodiments of the present invention.
Referring to fig. 1 to 6, a gas bearing 1000, also called an air bearing or an air bearing, suitable for a motor, especially a high-power high-speed motor, and the like according to an embodiment of the present invention is described, and the gas bearing 1000 is illustrated by way of specific example.
Referring to fig. 1 and 2, a gas bearing 1000 according to an embodiment of the present invention includes a shaft sleeve 100, a top foil 200, and a bump foil 300, wherein the shaft sleeve 100 is provided with a shaft hole 110, and the shaft hole 110 is used for penetrating a rotor shaft of a motor. First draw-in groove 120 and second draw-in groove 130 have been seted up to the internal perisporium of axle sleeve 100, and the notch of first draw-in groove 120 and second draw-in groove 130 all faces shaft hole 110, and just first draw-in groove 120 and second draw-in groove 130 extend to the other end by the one end of axle sleeve 100, make first draw-in groove 120 and second draw-in groove 130 run through axle sleeve 100 along the axial of axle sleeve 100. The top foil 200 and the bump foil 300 are both of a foil structure and are bent to form a ring shape, wherein a corrugated structure 330 is formed on the surface of the bump foil 300, the top foil 200 and the bump foil 300 are both located in the axial hole 110, the top foil 200 is arranged at an interval with the inner peripheral wall of the shaft sleeve 100, and the bump foil 300 is nested between the top foil 200 and the shaft sleeve 100; one end of the top foil 200 along the circumferential direction of the sleeve 100 is bent to form a first bent edge 210, and the other end of the top foil 200 is bent to form a second bent edge 220; one end of the bump foil 300 along the circumferential direction of the shaft sleeve 100 is bent to form a third folded edge 310, the other end of the bump foil 300 is bent to form a fourth folded edge 320, the first folded edge 210 and the third folded edge 310 are embedded into the first clamping groove 120, and the second folded edge 220 and the fourth folded edge 320 are embedded into the second clamping groove 130.
Referring to fig. 1 and 2, in the embodiment, the end surface of the shaft sleeve 100 is further provided with a first mounting hole 140 and a second mounting hole 150, and the first mounting hole 140 and the second mounting hole 150 both extend from one end to the other end of the shaft sleeve 100, so that the first mounting hole 140 and the second mounting hole 150 penetrate through the shaft sleeve 100 in the axial direction of the shaft sleeve 100; the first mounting hole 140 is in communication with and partially overlaps the first card slot 120, and the second mounting hole 150 is in communication with and partially overlaps the second card slot 130. It can be understood that, in the radial direction of the shaft sleeve 100, the first mounting hole 140 and the second mounting hole 150 are located between the inner circumferential wall and the outer circumferential wall of the shaft sleeve 100, the first locking groove 120 and the second locking groove 130 extend from the inner circumferential wall to the outer circumferential wall of the shaft sleeve 100, and both the first locking groove 120 and the second locking groove 130 are communicated with the shaft hole 110; the first mounting hole 140 is located at one side of the first card slot 120, and a part of the first mounting hole 140 extends into the first card slot 120, so that a part of the first mounting hole 140 and the first card slot 120 can be overlapped; similarly, the second mounting hole 150 is located at one side of the second card slot 130, and a part of the second mounting hole 150 extends into the second card slot 130, so that a part of the second mounting hole 150 and the second card slot 130 can overlap.
Referring to fig. 1 and 2, the gas bearing 1000 of the embodiment further includes a first insert pin 400 and a second insert pin 500, the first insert pin 400 is matched with the first installation hole 140, the second insert pin 500 is matched with the second installation hole 150, when assembling, the first folded edge 210 and the third folded edge 310 are inserted into the first slot 120, the second folded edge 220 and the fourth folded edge 320 are inserted into the second slot 130, and then the first insert pin 400 and the second insert pin 500 are inserted into the first installation hole 140 and the second installation hole 150, respectively. Because the first mounting hole 140 partially coincides with the first slot 120, and the second mounting hole 150 partially coincides with the second slot 130, the portion of the first bolt 400 can extend into the first slot 120, the first folded edge 210 and the third folded edge 310 can be compressed and fixed by the first bolt 400, and the second folded edge 220 and the fourth folded edge 320 can be compressed and fixed by the second bolt 500, so that the two ends of the top foil 200 and the two ends of the wave foil 300 are respectively fixed in the first slot 120 and the second slot 130, that is, the two ends of the top foil 200 and the two ends of the wave foil 300 are both fixedly connected with the shaft sleeve 100, thereby achieving the purpose of fixing the top foil 200 and the wave foil 300, and the structure is stable and reliable.
It can be understood that the gas bearing 1000 according to the embodiment of the present invention is applied to a high-power high-speed motor, the gas bearing 1000 according to the embodiment supports a rotor shaft of the motor along a radial direction of the shaft sleeve 100, which is also referred to as a radial gas bearing, and the gas bearing 1000 supports the rotor shaft, so that the rotor can rotate at a high speed, the rotation speed can reach more than twenty thousand revolutions per minute, and the gas bearing has advantages of high rotation speed, high temperature resistance, high reliability and the like compared with a sliding bearing and a rolling bearing; because both ends of the top foil 200 and the bump foil 300 are fixed, the rotor shaft can rotate clockwise or anticlockwise, so that bidirectional rotation is realized, and the phenomenon of rotor locking is avoided; and after top foil 200 or ripples foil 300 damage, only need take off first bolt 400 and second bolt 500 and can change top foil 200 or ripples foil 300, axle sleeve 100 reuse, use cost is low, and high-speed motor specifically can be applied to high-speed rotating equipment such as fuel cell air compressor machine, centrifugal refrigeration compressor, air-blower, and application scope is wider.
Referring to fig. 1 and 2, it should be noted that the gas bearing 1000 of the embodiment shown in fig. 1 and 2 includes a top foil 200 and a wave foil 300, the top foil 200 and the wave foil 300 both extend along the circumferential direction of the shaft sleeve 100, so that the wave foil 300 can cover the inner circumferential wall of the shaft sleeve 100, and the top foil 200 covers the inner circumferential wall of the wave foil 300. In an embodiment, the first card slot 120 is adjacent to the second card slot 130, the first mounting hole 140 is located on a side of the first card slot 120 away from the second card slot 130, and the second mounting hole 150 is located on a side of the second card slot 130 away from the first card slot 120, i.e. the first card slot 120 and the second card slot 130 are located between the first mounting hole 140 and the second mounting hole 150. It is understood that the first mounting hole 140 and the second mounting hole 150 may also be disposed between the first card slot 120 and the second card slot 130, and are not limited thereto.
Referring to fig. 1, 3 and 4, it should be noted that the first locking groove 120 includes a first groove 121 and a second groove 122, the first groove 121 and the second groove 122 are connected along a radial direction of the shaft sleeve 100, one end of the first groove 121 is communicated with the shaft hole 110, the other end is communicated with the second groove 122, the first groove 121 is obliquely arranged from an inner peripheral wall of the shaft hole 110 to the second groove 122, the second groove 122 extends along the radial direction of the shaft sleeve 100, and the first groove 121 has an oblique angle relative to the radial direction of the shaft sleeve 100; the second slot 130 includes a third slot 131 and a fourth slot 132, the third slot 131 and the fourth slot 132 are connected along the radial direction of the shaft sleeve 100, one end of the third slot 131 is communicated with the shaft hole 110, the other end is communicated with the fourth slot 132, the third slot 131 is inclined from the inner peripheral wall of the shaft hole 110 to the fourth slot 132, the fourth slot 132 extends along the radial direction of the shaft sleeve 100, the third slot 131 has an inclined angle relative to the radial direction of the shaft sleeve 100, that is, the first slot 120 and the second slot 130 both have inclined slot structures, so that the first folded edge 210 and the third folded edge 310 are inserted into the first slot 120 along the inclined angle, and the second folded edge 220 and the fourth folded edge 320 are inserted into the second slot 130 along the inclined angle, so that the bending angles of the first folded edge 210 and the second folded edge 220 are not equal to 90 °, also, the bending angles of the third folded edge 310 and the fourth folded edge 320 are not equal to 90 °, which is not needed to be bent into a right angle, which is beneficial to reducing the influence of stress residue, so that the top foil 200 and the foil 300 are located, thereby improving the stability of the gas bearing structure, and making the bearing difficult deformation performance better. It should be noted that the first slot 121 and the third slot 131 may be straight slots or circular arc slots, and are not limited in particular.
It should be noted that, in the related art, one end of each of the wave foil 300 and the top foil 200 is bent to form a folded edge having a right angle, the slot of the inner peripheral wall of the shaft sleeve 100 extends in the radial direction to form a vertical slot, the folded edge is inserted into the slot, and the other end of each of the wave foil 300 and the top foil 200 is a free end; the deformation is easily generated at the right angle after long-time use under the influence of residual stress, and the deformation direction is uncertain. If the top foil 200 deforms toward the free end of the bump foil 300, the top foil 200 and the bump foil 300 are not well adhered to each other, the top foil 200 is easily dry-ground with the rotor shaft, and the gas bearing is easily damaged; if the bump foil 300 is deformed toward the free end of the top foil 200, the effect of the bump foil 300 being attached to the inner wall of the shaft sleeve 100 is not good, and the bearing gap is not accurate. The residual stress refers to self-balanced internal stress remaining in an object after external force or uneven temperature field and the like are eliminated, uneven plastic deformation or phase change may cause the residual stress, and the residual stress may cause the part to warp or distort and even crack. Therefore, if the direction of the residual stress is not determined, the bent portions of the top foil 200 and the bump foil 300 are likely to be cracked.
Referring to fig. 4, 5, and 6, in the gas bearing 1000 according to the embodiment of the present invention, the first groove 121 and the third groove 131 are respectively provided in the first groove 120 and the second groove 130, and the insertion positions of the top foil 200 and the bump foil 300 are bent to form an oblique angle, that is, the bent position is not a right angle. Specifically, the first flap 210 is bent at the first slot 121 to form a first bent section 211, the third flap 310 is bent at the first slot 121 to form a second bent section 311, the second flap 220 is bent at the second slot 122 to form a third bent section 221, and the fourth flap 320 is bent at the second slot 122 to form a fourth bent section 321.
Referring to fig. 3 and 4, the first groove 121 is taken as an example, and the radial direction of the shaft sleeve 100 is taken as a reference direction, the first groove 121 is inclined at an angle α of less than 90 ° with respect to the radial direction of the shaft sleeve 100, the first bending section 211 and the second bending section 311 are stacked and inserted into the first groove 121, and the bending angles of the first bending section 211 and the second bending section 311 with respect to the corresponding foils are less than 90 °. It can be understood that, in the bending state of the top foil 200 and the wave foil 300 at the above-mentioned inclination angle, the residual stress generated acts to deform the foil in the direction of returning to the original straight state, that is, the residual stress at the inclination angle is fixed, and the deformation direction of the top foil 200 and the wave foil 300 is determined, so that the wave foil 300 is tightly attached to the inner peripheral wall of the shaft sleeve 100, the top foil 200 is tightly attached to the wave foil 300, and the attaching effect between the top foil 200 and the wave foil 300 is better, thereby improving the performance of the gas bearing 1000.
Referring to fig. 3, it can be understood that, in some embodiments, the inclination angle α of the first groove 121 with respect to the radial direction of the bushing 100 satisfies: alpha is more than or equal to 40 degrees and less than or equal to 50 degrees, namely the value of the inclination angle alpha is more than or equal to 40 degrees and less than or equal to 50 degrees, and the first folded edge 210 and the third folded edge 310 are more easily inserted into the first clamping groove 120 in the angle range; the inclination angle α is preferably 45 °, and is not particularly limited. Similarly, the inclination angle β of the third groove 131 with respect to the radial direction of the sleeve 100 satisfies: beta is more than or equal to 40 degrees and less than or equal to 50 degrees, namely the value of the inclination angle beta is more than or equal to 40 degrees and less than or equal to 50 degrees, the inclination angle beta is preferably 45 degrees, the second folded edge 220 and the fourth folded edge 320 can be conveniently inserted into the second clamping groove 130, the inclination angles of the first groove body 121 and the third groove body 131 can be the same or different, and the first groove body 121 and the third groove body 131 are not specifically limited.
Referring to fig. 3 and 4, it should be noted that in the embodiment, the first slot 121 and the third slot 131 are inclined in opposite directions, and the two ends of the top foil 200 and the corrugated foil 300 are respectively inserted into the corresponding slots in different directions. The second slot 122 and the fourth slot 132 both extend in the radial direction of the shaft sleeve 100 to form a vertical slot, the first folding edge 210 and the third folding edge 310 both have a straight section matching the second slot 122, and the second folding edge 220 and the fourth folding edge 320 have a straight section matching the fourth slot 132. The first mounting hole 140 partially coincides with the second slot 122 and the second mounting hole 150 partially coincides with the fourth slot 132. Through the arrangement, the first mounting hole 140 and the second mounting hole 150 are more reasonable in layout, the first bolt 400 can compress the straight sections of the first folded edge 210 and the third folded edge 310 at the coinciding position after being inserted into the first mounting hole 140, the second bolt 500 can compress the straight sections of the second folded edge 220 and the fourth folded edge 320 at the coinciding position after being inserted into the second mounting hole 150, the installation is convenient, the structure of the folded sections is not affected, the top foil 200 and the wave foil 300 can be fixed more stably, and the top foil 200 and the wave foil 300 are not easy to separate from the first clamping groove 120 and the second clamping groove 130.
Referring to fig. 3 and 4, it can be understood that the sum of the thickness of the first folded edge 210 and the thickness of the third folded edge 310 is equal to the width of the first slot 120, so that the first folded edge 210 and the third folded edge 310 can be tightly fitted into the first slot 120, and the first latch 400 is inserted into the first mounting hole 140 to compress the first folded edge 210 and the third folded edge 310, and the structure is more stable and reliable. Similarly, the sum of the thickness of the second flange 220 and the thickness of the fourth flange 320 is equal to the width of the second slot 130, so that the second flange 220 and the fourth flange 320 can be tightly assembled in the second slot 130, and the second pin 500 is inserted into the second mounting hole 150 to compress the second flange 220 and the fourth flange 320, so that the two ends of the top foil 200 and the two ends of the wave foil 300 are reliably fastened, and the loosening phenomenon is avoided.
It should be noted that, in some embodiments, the width of the first card slot 120 may be slightly larger than the sum of the thickness of the first folded edge 210 and the thickness of the third folded edge 310, the width of the second card slot 130 may be slightly larger than the sum of the thickness of the second folded edge 220 and the thickness of the fourth folded edge 320, so as to facilitate the folding and insertion of the first folded edge 210 and the third folded edge 310 into the first card slot 120 and the folding and insertion of the second folded edge 220 and the fourth folded edge 320 into the second card slot 130, and the widths of the first card slot 120 and the second card slot 130 are set according to the required thicknesses of the top foil 200 and the bump foil 300, which is not limited in particular.
Referring to fig. 4, it can be understood that the first mounting hole 140 and the second groove 122 need to be partially overlapped, and the second mounting hole 150 and the fourth groove 132 need to be partially overlapped, so as to enable a portion of the first plug 400 and the second plug 500 to extend into the corresponding card slot for pressing, in an embodiment, the width of the first mounting hole 140 is greater than the width of the first card slot 120, the width of the second mounting hole 150 is greater than the width of the second card slot 130, so as to ensure that the first plug 400 can press the first folded edge 210 and the third folded edge 310, and the second plug 500 can press the second folded edge 220 and the fourth folded edge 320. It can be understood that, since the top foil 200 and the bump foil 300 have smaller thicknesses, and the widths of the first card slot 120 and the second card slot 130 are smaller, when the width of the first mounting hole 140 is smaller than the width of the first card slot 120, the overlapping portion of the first mounting hole 140 and the first card slot 120 is too small or completely overlapped, so that the first latch 400 cannot effectively press the first folded edge 210 and the third folded edge 310, and the stability is poor; the same problem exists when the width of the second mounting hole 150 is smaller than the width of the second card slot 130, and details are not repeated.
Referring to fig. 1, 2 and 4, it should be noted that the first mounting hole 140 and the second mounting hole 150 of the embodiment of the present invention are both circular holes, the first latch 400 and the second latch 500 are both cylindrical latches, the first latch 400 is in interference fit with the first mounting hole 140, and the second latch 500 is in interference fit with the second mounting hole 150. The first bolt 400 and the first mounting hole 140 are taken as an example for explanation, a part of the first mounting hole 140 is overlapped with the first clamping groove 120, the width of the overlapped position is smaller than that of the first clamping groove 120, after the first folding edge 210 and the third folding edge 310 are inserted into the first clamping groove 120, the first bolt 400 is inserted into the first mounting hole 140, the arc-shaped side wall of the first bolt 400 forms an arc-shaped pressure surface for the first folding edge 210 and the third folding edge 310, more stable pressure can be applied, the fastening degree is higher, the top foil 200 and the wave foil 300 are not easily damaged, and the installation is also more convenient.
Referring to fig. 5 and 6, in the embodiment, the top foil 200 and the wave foil 300 are both made of thin metal sheets, and the thicknesses of the top foil 200 and the wave foil 300 need to be greater than 0mm (millimeter) and less than or equal to 0.5mm, that is, the thicknesses of the top foil 200 and the wave foil 300 are in the range of 0mm to 0.5mm, within the thickness range, the top foil 200 and the wave foil 300 are easy to be pressed and formed, and the manufacturing is more convenient, for example, the thicknesses of the top foil 200 and the wave foil 300 may be set to 0.2mm, 0.3mm, 0.5mm, and the like. In some preferred embodiments, the top foil 200 and the bump foil 300 have a thickness of 0.1mm, which is not only easy to manufacture, but also facilitates forming a stable bearing gap, resulting in a better performance of the gas bearing 1000. It can be appreciated that when the top foil 200 and the bump foil 300 are too thick, the structural rigidity may be changed, affecting the operational performance of the gas bearing 1000.
Referring to fig. 5 and 6, the corrugated structure 330 is formed on the surface of the bump foil 300, and the top foil 200 surface is a smooth plane, also called a flat foil. It can be understood that when the rotor shaft rotates at a high speed in the shaft hole 110, the top foil 200 and the bump foil 300 extend or contract in the radial direction of the sleeve 100, so that the air film pressure in the circumferential direction of the rotor shaft can be balanced, thereby achieving high-speed stable rotation of the rotor shaft.
It should be noted that in some embodiments, the top foil 200 is provided with a wear-resistant coating (not shown in the drawings) on its inner circumferential wall facing the center of the shaft hole 110. It can be understood that, when the gas bearing 1000 is in operation, the rotor shaft will contact with the inner circumferential wall of the top foil 200, and the wear resistance of the top foil 200 can be improved by adding the wear-resistant coating, so that the durability is higher, and the service life of the gas bearing 1000 is effectively prolonged. In some embodiments, the wear-resistant coating is made of a mixture of PTFE (polytetrafluoroethylene) and PI (polyimide), or a mixture of PTFE (polytetrafluoroethylene) and MoS2 (molybdenum disulfide), and may also be made of a mixture of PI (polyimide) and MoS2 (molybdenum disulfide), without limitation.
It is understood that, in some embodiments, the shaft sleeve 100 is provided with a plurality of foil units distributed along the circumferential direction, the plurality of foil units are distributed along the circumferential direction of the shaft sleeve 100 in the shaft hole 110, each foil unit includes a top foil 200 and a bump foil 300, that is, the top foil 200 and the bump foil 300 are provided with a plurality of pieces, the top foil 200 and the bump foil 300 are provided in a one-to-one correspondence, the shaft sleeve 100 is provided with a plurality of first clamping grooves 120, a plurality of second clamping grooves 130, a plurality of first mounting holes 140 and a plurality of second mounting holes 150, the first clamping grooves 120 are in one-to-one correspondence with the first mounting holes 140, the second clamping grooves 130 are in one-to-one correspondence with the second mounting holes 150, the first pins 400 and the second pins 500 are provided with a plurality of pieces, the first clamping grooves 120, the second clamping grooves 130, the first mounting holes 140, the second mounting holes 150, the first pins 400 and the second pins 500 are in the same number as the top foil 200 or the bump foil 300, the first folding edge 210 and the third folding edge 310 in each foil unit is inserted into the corresponding first clamping groove 120, and the corresponding first pin 140; the second folded edge 220 and the fourth folded edge 320 of each foil unit are inserted into the corresponding second locking groove 130, and each second pin 500 is inserted into the corresponding second mounting hole 150, so that both ends of each foil unit are fixed. For example, the shaft sleeve 100 is provided with three foil units, the top foil 200 and the bump foil 300 are respectively provided with three foil units, the foil units are arranged along the circumferential direction of the shaft sleeve 100 to form a ring structure, in one foil unit, the first folded edge 210 and the second folded edge 220 at two ends of the top foil 200 are respectively inserted into the corresponding first slot 120 and the second slot 130, the third folded edge 310 and the fourth folded edge 320 at two ends of the bump foil 300 are respectively inserted into the corresponding first slot 120 and the second slot 130, and are inserted into the corresponding first mounting hole 140 by using one first plug 400, and one second plug 500 is inserted into the corresponding second mounting hole 150, so as to fix one foil unit, the number of the first slot 120, the second slot 130, the first mounting hole 140, the second mounting hole 150, the first plug 400 and the second plug 500 is three, and the other number of foil units can refer to the assembly structure of the above embodiment, which is not described herein.
The embodiment of the invention also provides a motor (not shown in the attached drawings), wherein the motor adopts the gas bearing 1000 of the embodiment to support the rotor shaft, so that the rotor shaft can rotate clockwise or anticlockwise, bidirectional rotation can be realized, and the phenomenon of rotor locking is avoided; after the top foil 200 or the bump foil 300 is damaged, the top foil 200 or the bump foil 300 can be replaced only by taking down the first pin 400 and the second pin 500, the shaft sleeve 100 can be recycled, the use cost is low, the gas bearing 1000 has better working performance, the stability of the motor operation is improved, and the performance of the motor is also improved.
The embodiment of the invention also provides high-speed rotating equipment which can be products such as a fuel cell air compressor, a centrifugal refrigeration compressor, an air blower and the like.
The embodiments of the present invention have been described in detail with reference to the drawings, but the present invention is not limited to the embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.
Claims (14)
1. A gas bearing, comprising:
the shaft sleeve is provided with a shaft hole, the inner peripheral wall of the shaft sleeve is provided with a first clamping groove and a second clamping groove, the end face of the shaft sleeve is provided with a first mounting hole and a second mounting hole, the first clamping groove, the second clamping groove, the first mounting hole and the second mounting hole all extend from one end to the other end of the shaft sleeve, the first mounting hole is communicated with the first clamping groove, and the second mounting hole is communicated with the second clamping groove;
the top foil is arranged in the shaft hole in a surrounding mode, a first folded edge is formed at one end of the top foil along the circumferential direction of the shaft sleeve, a second folded edge is formed at the other end of the top foil, the first folded edge is embedded into the first clamping groove, and the second folded edge is embedded into the second clamping groove;
the corrugated foil is arranged in the shaft hole in a surrounding mode, the corrugated foil is nested between the shaft sleeve and the top foil, a third folded edge is formed at one end of the corrugated foil along the circumferential direction of the shaft sleeve, a fourth folded edge is formed at the other end of the corrugated foil, the third folded edge is embedded into the first clamping groove, and the fourth folded edge is embedded into the second clamping groove;
the first bolt is inserted into the first mounting hole to fix the first folding edge and the third folding edge, and the second bolt is inserted into the second mounting hole to fix the second folding edge and the fourth folding edge.
2. The gas bearing of claim 1, wherein the first slot comprises a first slot body and a second slot body which are connected along the radial direction of the shaft sleeve, the first slot body is obliquely arranged from the inner peripheral wall of the shaft sleeve to the second slot body, the first folding edge is provided with a first folding section matched with the first slot body, and the third folding edge is provided with a second folding section matched with the first slot body.
3. The gas bearing of claim 2, wherein the first groove has an inclination angle α with respect to the radial direction of the bearing housing, which satisfies: alpha is more than or equal to 40 degrees and less than or equal to 50 degrees.
4. The gas bearing of claim 2, wherein the second groove comprises a third groove and a fourth groove connected in a radial direction of the shaft sleeve, the third groove is inclined from the inner peripheral wall of the shaft sleeve to the fourth groove, the second flange is provided with a third bending section matched with the third groove, and the fourth flange is provided with a fourth bending section matched with the third groove.
5. A gas bearing according to claim 4, wherein the third grooves are inclined at an angle β with respect to the radial direction of the sleeve such that: beta is more than or equal to 40 degrees and less than or equal to 50 degrees.
6. The gas bearing of claim 4, wherein the second groove and the fourth groove both extend in a radial direction of the bushing, the first mounting hole is located at one side of the second groove, and the second mounting hole is located at one side of the fourth groove.
7. A gas bearing according to any of claims 1 to 6, wherein the width of each of the first and second clamping grooves is greater than or equal to the sum of the thicknesses of the top and wave foils.
8. The gas bearing of claim 7, wherein the first mounting hole has a width greater than a width of the first snap groove; the width of the second mounting hole is larger than that of the second clamping groove.
9. The gas bearing of claim 1, wherein the first and second mounting holes are circular holes, the first pin is in interference fit with the first mounting hole, and the second pin is in interference fit with the second mounting hole.
10. The gas bearing of claim 1, wherein the top foil and the bump foil each have a thickness of less than or equal to 0.5mm.
11. A gas bearing according to claim 1 or 10, wherein the inner circumferential wall of the top foil is provided with a wear resistant coating.
12. The gas bearing of claim 1, wherein the top foil and the bump foil cooperate to form a plurality of foil units, the plurality of foil units are distributed in the shaft hole along a circumferential direction of the shaft sleeve, the shaft sleeve is provided with a plurality of first clamping grooves, a plurality of second clamping grooves, a plurality of first mounting holes and a plurality of second mounting holes, each of the first pins and the second pins is provided with a plurality of pins, the first folding edge and the third folding edge of each foil unit are embedded in the corresponding first clamping groove, and each first pin is inserted into the corresponding first mounting hole; the second folded edge and the fourth folded edge in each foil unit are embedded into the corresponding second clamping grooves, and each second bolt is inserted into the corresponding second mounting hole.
13. Electrical machine, comprising a gas bearing according to any of claims 1 to 12.
14. High speed rotation device, characterized in that it comprises a motor according to claim 13.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210933465.7A CN115296467A (en) | 2022-08-04 | 2022-08-04 | Gas bearing, motor and high-speed rotating equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210933465.7A CN115296467A (en) | 2022-08-04 | 2022-08-04 | Gas bearing, motor and high-speed rotating equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115296467A true CN115296467A (en) | 2022-11-04 |
Family
ID=83826767
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210933465.7A Pending CN115296467A (en) | 2022-08-04 | 2022-08-04 | Gas bearing, motor and high-speed rotating equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115296467A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2022540995A (en) * | 2019-07-16 | 2022-09-21 | ロベルト・ボッシュ・ゲゼルシャフト・ミト・ベシュレンクテル・ハフツング | foil bearing |
-
2022
- 2022-08-04 CN CN202210933465.7A patent/CN115296467A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2022540995A (en) * | 2019-07-16 | 2022-09-21 | ロベルト・ボッシュ・ゲゼルシャフト・ミト・ベシュレンクテル・ハフツング | foil bearing |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20070096572A1 (en) | Slip fit tolerance ring | |
| CN115296467A (en) | Gas bearing, motor and high-speed rotating equipment | |
| CN110594286B (en) | Foil gas dynamic pressure bearing and high-speed motor | |
| TWI414132B (en) | A combination of motor stators | |
| CN112196890A (en) | Radial gas foil bearing | |
| CN110566572B (en) | Variable air gap foil bearing and high-speed motor | |
| US11101712B2 (en) | Motor, end cap and manufacturing method thereof | |
| CN110594285B (en) | Gas dynamic pressure bearing and high-speed motor | |
| CN217769703U (en) | Gas bearing, motor and high-speed rotating equipment | |
| JP2018068000A (en) | Bearing retention structure and motor | |
| CN217824540U (en) | Gas bearing, motor and high-speed rotating equipment | |
| KR100868897B1 (en) | Foil bearing of bi-directional rotatable | |
| KR20010063915A (en) | Foil thrust bearing | |
| US20120291751A1 (en) | Intake air quantity control device for internal combustion engine | |
| CN217130105U (en) | Thrust bearing assembly and thrust dynamic pressure gas bearing | |
| CN213511662U (en) | Radial gas foil bearing | |
| CN218102901U (en) | Motor and air conditioner | |
| CN216044968U (en) | Rotating assembly and mobile terminal | |
| CN220857743U (en) | Shell assembly and motor | |
| CN220254262U (en) | High-speed prism motor | |
| CN218235829U (en) | Air foil bearing with interlocking function | |
| CN219045522U (en) | Radial air bearing device | |
| CN219420414U (en) | Motor support, motor support assembly and air duct machine | |
| CN214101034U (en) | End cover, end cover subassembly and motor | |
| CN216530968U (en) | Three-phase direct current brushless motor applied to high-temperature environment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |