CN111963571B - Foil dynamic pressure gas bearing - Google Patents
Foil dynamic pressure gas bearing Download PDFInfo
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- CN111963571B CN111963571B CN202010818095.3A CN202010818095A CN111963571B CN 111963571 B CN111963571 B CN 111963571B CN 202010818095 A CN202010818095 A CN 202010818095A CN 111963571 B CN111963571 B CN 111963571B
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- foil
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- fixing plate
- gas bearing
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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
- 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
- F16C32/0614—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 the gas being supplied under pressure, e.g. aerostatic 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
- 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
- F16C32/0662—Details of hydrostatic bearings independent of fluid supply or direction of load
- F16C32/067—Details of hydrostatic bearings independent of fluid supply or direction of load of bearings adjustable for aligning, positioning, wear or play
Abstract
The invention discloses a foil dynamical pressure gas bearing which comprises a bearing seat, a bottom foil, a bump foil, a top foil and an adjusting foil. In the scheme, the adjusting foil is additionally arranged between the wave foil and the bottom foil and used for adjusting the thickness of the inlet air film between the top foil and the thrust disc. The thickness of the inlet gas film is reduced by additionally arranging the adjusting foil below the corrugated foil, and the smaller the thickness of the inlet gas film is, the larger the compression amount of the entering gas is, and the stronger the bearing capacity of the foil dynamic pressure gas bearing is.
Description
Technical Field
The invention relates to the technical field of bearings, in particular to a foil dynamical pressure gas bearing.
Background
The foil hydrodynamic gas bearing is a fluid film lubrication bearing which adopts gas as a lubrication medium, and has the characteristics of a general rigid surface hydrodynamic gas radial bearing, and also has the advantages of high bearing capacity, low friction power consumption, high stability, wide working temperature range, allowable bearing gap loss, impact resistance, low assembly centering requirement, good start-stop performance and the like. Since the surface of the bearing is flexible, the foil hydrodynamic gas bearing is able to establish its working film gap thickness at all times to accommodate angular misalignment of the rotor non-parallel to the bearing axis and to accommodate some degree of local gap variation.
The foil hydrodynamic gas bearing utilizes the compression effect of a wedge-shaped gas film between a top foil and a thrust disc to generate axial bearing capacity, and the bearing capacity of the wave foil hydrodynamic gas bearing can be enhanced by reducing the thickness of the wedge-shaped gas film.
Therefore, how to enhance the bearing capacity of the foil dynamical pressure gas bearing becomes a technical problem to be solved urgently by those skilled in the art.
Disclosure of Invention
In view of the above, the present invention provides a foil dynamical pressure gas bearing to enhance the bearing capacity of the foil dynamical pressure gas bearing.
In order to achieve the purpose, the invention provides the following technical scheme:
a foil hydrodynamic gas bearing comprising:
the bearing seat is provided with a first mounting hole matched with the rotor;
the bottom foil is a circular bottom foil and is arranged in the bearing seat, and a second mounting hole corresponding to the first mounting hole is formed in the bottom foil;
the wave foil pieces are fan-shaped corrugated foil pieces and are positioned on the upper surface of the bottom foil piece, the number of the wave foil pieces is at least three, the wave foil pieces are uniformly distributed along the circumference of the second mounting hole, the first end where one radius of the wave foil pieces is located is a first fixed end, the second end where the other radius of the wave foil pieces is located is a first free end, and the first fixed end is connected with the bottom foil piece;
the top foil is a fan-shaped flat foil, the top foil corresponds to the wave foil in position and is positioned on the upper layer of the wave foil, the top foil is uniformly distributed along the circumference of the second mounting hole, the first end of one radius of the top foil is a second fixed end, the second end of the other radius of the top foil is a second free end, and the second fixed end is connected with the bottom foil;
the adjusting foil is a fan-shaped flat foil and is used for adjusting the thickness of an inlet air film between the top foil and the thrust disc, the adjusting foil is at least equal to the size of the wave foil, the adjusting foil corresponds to the position of the wave foil and is located between the wave foil and the bottom foil, the adjusting foil is uniformly distributed on the circumference of the second mounting hole, the first end where one of the radii of the adjusting foil is located is a third fixed end, the second end where the other radius of the adjusting foil is located is a third fixed end, and the third fixed end is connected with the bottom foil.
Preferably, in the above foil dynamical pressure gas bearing, the top foil includes:
a top foil body;
the inclined plate is a rectangular inclined plate or a fan-shaped inclined plate, the inclined plate inclines from the bottom foil piece to the direction far away from the bottom foil piece, and the first end of the inclined plate is connected with the second fixed end of the top foil piece body;
the first fixing plate is a rectangular fixing plate, the first fixing plate is connected with the second end of the inclined plate, the first fixing plate is connected with the bottom foil, and the first fixing plate is attached to the bottom foil.
Preferably, in the above foil dynamical pressure gas bearing, a first connection position between the first fixed end and the bottom foil and a first connection position between the third fixed end and the top foil are arranged in a staggered manner with respect to a second connection position between the second fixed end and the top foil, and the first connection position is located below the swash plate.
Preferably, in the above foil dynamical pressure gas bearing, a support cantilever is provided on the bottom foil between the first connection position and the second connection position,
the fourth fixed end of the supporting cantilever is close to the first connecting position, and the fourth free end of the supporting cantilever can be abutted to the inclined plate.
Preferably, in the above foil dynamical pressure gas bearing, a groove for accommodating the supporting cantilever is formed in the bottom foil.
Preferably, in the above foil dynamical pressure gas bearing, the number of the support cantilevers is at least two, and the support cantilevers are arranged along a radial direction of the bottom foil.
Preferably, in the above foil dynamical pressure gas bearing, the first fixing plate and the bottom foil are connected by a first rivet.
Preferably, in the foil dynamical pressure gas bearing, the adjusting foil may be bonded to the bottom foil;
the bump sheet comprises a bump sheet body and a second fixing plate,
the second fixed plate is connected with the first fixed end of the wave foil body, and the second fixed plate is connected with the bottom foil and can be attached to the adjusting foil.
Preferably, in the foil dynamical pressure gas bearing, the second fixing plate and the bottom foil are connected by a second rivet, and the second rivet can be abutted against the inclined plate;
the corrugated foil body is provided with a fine groove.
Preferably, in the foil dynamical pressure gas bearing, a plurality of positioning grooves are formed in the periphery of the bottom foil;
and the bearing seat is provided with a positioning boss matched with the positioning groove.
According to the technical scheme, the foil dynamical pressure gas bearing comprises a bearing seat, a bottom foil, a corrugated foil, a top foil and an adjusting foil. In the scheme, the adjusting foil is additionally arranged between the wave foil and the bottom foil and used for adjusting the thickness of the inlet air film between the top foil and the thrust disc. The thickness of the inlet gas film is reduced by additionally arranging the adjusting foil below the corrugated foil, and the smaller the thickness of the inlet gas film is, the larger the compression amount of the entering gas is, and the stronger the bearing capacity of the foil dynamic pressure gas bearing is.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a bearing seat of a foil dynamical pressure gas bearing according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a foil dynamical pressure gas bearing (not including a bearing seat) according to an embodiment of the present invention;
FIG. 3 is an enlarged view of a portion of a foil dynamical pressure gas bearing (not including a bearing seat) according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a bottom foil according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a top foil structure according to an embodiment of the present invention;
FIG. 6 is a schematic structural diagram of a bump foil according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a trimming foil according to an embodiment of the present invention.
Wherein the content of the first and second substances,
1. the bearing seat 11, the positioning boss 2, the bottom foil 21, the supporting cantilever 3, the bump foil 31, the bump foil body 32, the second fixing plate 4, the top foil 41, the top foil body 42, the inclined plate 43, the first fixing plate 5 and the adjusting foil.
Detailed Description
The invention discloses a foil dynamical pressure gas bearing, which is used for enhancing the bearing capacity of the foil dynamical pressure gas bearing.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Please refer to fig. 1-7. The invention discloses a foil dynamical pressure gas bearing which comprises a bearing seat 1, a bottom foil 2, a bump foil 3, a top foil 4 and an adjusting foil 5.
A bottom foil 2, a wave foil 3, a top foil 4 and an adjusting foil 5 are installed in the bearing seat 1, and the top foil 4, the wave foil 3, the adjusting shifting piece and the bottom foil 2 are sequentially overlapped from the opening end of the bearing seat 1 to the bottom end of the bearing seat 1 along the axial direction of the bearing seat 1. The bearing seat 1 is provided with a first mounting hole matched with the rotor.
The bottom foil 2 is a circular bottom foil which is continuous in the circumferential direction, a second mounting hole which corresponds to and is communicated with the first mounting hole is formed in the bottom foil 2, and the second mounting hole is matched with the rotor.
The wave foil 3 is a fan-shaped corrugated foil, namely a fan-shaped foil is provided with a corrugated structure, the number of the wave foils 3 is at least three, the wave foils are positioned on the upper surface of the bottom foil 2, and the wave foils 3 are uniformly distributed along the circumference of the second mounting hole. The edge of the fan-shaped wave foil 3 comprises two edges with the radius and two arc edges, wherein the first end of one of the edges with the radius is a first fixed end, the second end of the other edge with the radius is a first free end, the first fixed end is connected with the bottom foil 2, and the first free end can move along the circumferential direction of the bottom foil 2 under the action of pneumatic force to balance the circumferential deformation of the bottom foil caused by the pneumatic force.
As shown in fig. 6, the corrugations of the wave foil 3 are parallel to the first fixed end of the wave foil 3.
The number of layers of the bump foils 3 of the foil dynamical pressure gas bearing is not limited to one, specifically, the number of layers of the bump foils 3 of the foil dynamical pressure gas bearing can be one or multiple, the multiple layers of bump foils 3 are mutually overlapped to adjust the rigidity of the foil dynamical pressure gas bearing, and meanwhile, the damping of the foil dynamical pressure gas bearing can be increased through the friction action between the adjacent bump foils 3, so that the running stability of the foil dynamical pressure gas bearing is ensured.
In the embodiment where the number of layers of the wave foil is one, the number of the wave foils 3 is 3 to 12.
In embodiments where the number of layers of the wave foil is more than one, the wave foil 3 is in groups of 3-12.
The top foil 4 is a fan-shaped flat foil, and the top foil 4 has no corrugated structure and is a foil structure with equal thickness and height. The top foil 4 corresponds to the wave foil 3 in position, is positioned on the upper layer of the wave foil 3, and can form an inlet air film with the thrust disc. The number of the top foils 4 is plural and is uniformly distributed along the circumference of the second mounting hole. The first end of one of the radiuses of the top foil piece 4 is a second fixed end, the second end of the other radius of the top foil piece 4 is a second free end, the second fixed end is connected with the bottom foil piece 2, and the second free end can move circumferentially along with the first free end of the bottom foil piece 2 under the action of pneumatic force to balance circumferential deformation of the second free end caused by the pneumatic force.
The number of layers of the adjusting foils 5 of the foil hydrodynamic gas bearing is not limited to one, specifically, the number of layers of the adjusting foils 5 of the foil hydrodynamic gas bearing can be one or multiple, and multiple layers of adjusting foils 5 are mutually overlapped to adjust the thickness of an inlet gas film of the foil hydrodynamic gas bearing and enhance the bearing capacity of the foil hydrodynamic gas bearing.
In the embodiment where the number of layers of the top foil is adjusted to one, the number of the top foil 4 is 3 to 12.
In embodiments where the number of layers of trim foil is more than one, the top foil 4 is in the range of 3-12 groups.
The adjusting foil 5 is used to adjust the inlet film thickness between the top foil 4 and the thrust disc. The adjusting foil 5 is a fan-shaped flat foil, and the adjusting foil 5 corresponds to the bump foil 3 and is located between the bump foil 3 and the bottom foil 2. The number of the adjusting foils 5 is multiple, the adjusting foils 5 are uniformly distributed along the circumference of the second mounting hole, the first end where one radius of the adjusting foils 5 is located is a third fixed end, the second end where the other radius of the adjusting foils 5 is located is a third fixed end, the third fixed end is connected with the bottom foil 2, and the third free end is not fixed.
In order to further optimize the technical scheme, the weight-reducing grooves (not shown) or weight-reducing holes (not shown) are formed in the adjusting foil 5, so that the overall weight of the foil dynamical pressure gas bearing is reduced on the basis of ensuring the adjusting capability of the adjusting foil 5.
In a particular embodiment of the solution the number of adjusting foils 5 is 3-12.
Specifically, the bump foil 3 and the adjustment foil 5 are first connected to the bottom foil 2, and then the top foil 4 is connected to the bottom foil 2.
The foil dynamical pressure gas bearing disclosed by the scheme comprises a bearing seat 1, a bottom foil 2, a bump foil 3, a top foil 4 and an adjusting foil 5. In the scheme, an adjusting foil 5 is additionally arranged between the wave foil 3 and the bottom foil 2 and used for adjusting the thickness of an inlet air film between the top foil 4 and the thrust disc. The thickness of the inlet gas film is reduced by additionally arranging the adjusting foil 5 below the corrugated foil 3, and the smaller the thickness of the inlet gas film is, the larger the compression amount of the entering gas is, and the stronger the bearing capacity of the foil dynamic pressure gas bearing is.
When the thickness of the inlet air film is adjusted, the thickness of the adjusting foil 5 can be changed, the layer number of the adjusting foil 5 can also be changed, the adjusting range of the thickness of the inlet air film is large, and the adjustment is convenient.
As shown in fig. 2, the size of the adjusting foil 5 is at least equal to the size of the bump foil 3, so that the adjusting foil 5 can support the bump foil 3 and the top foil 4, and the bump foil 3 and the top foil 4 are raised integrally relative to the height of the opening end of the bearing.
As shown in fig. 5, the top foil 4 includes a top foil body 41, an inclined plate 42, and a first fixing plate 43.
The top foil body 41 is a flat foil and is of a foil structure with equal thickness and height at each position;
the inclined plate 42 is a rectangular inclined plate or a fan-shaped inclined plate and is used for connecting the top foil body 41 and the first fixing plate 43, and the inclined plate 42 inclines from the bottom foil to the direction far away from the bottom foil;
after the first fixing plate 43 is connected to the inclined plate 42, the distance between the top foil 4 and the bottom foil 2 is greater than the distance between the first fixing plate 43 and the bottom foil 2.
The first fixing plate 43 of the top foil 4 is connected to the bottom foil 2, and the first fixing plate 43 is attached to the bottom foil 2. Preferably, the first fixing plate 43 abuts against the corrugations of the corrugated foil 3.
Because the wave foil 3 is provided with the corrugations, the thickness of the wave foil 3 in the direction perpendicular to the bottom foil 2 is relatively large, the top foil 4 is a flat foil, one end of the inclined plate 42 is abutted against the corrugations of the wave foil 3, the other end of the inclined plate 42 is connected with the first fixing plate 43, and the height of one end, close to the wave foil 3, of the inclined plate 42 is at least equal to the height of the corrugations on the wave foil 3.
The first fixing plate 43 and the bottom foil 2 may be connected in various ways, and specifically, the first fixing plate 43 and the bottom foil 2 are riveted, welded or bonded together.
Preferably, the thickness of the top foil 4 in the present embodiment is 0.1-0.2mm, that is, the thickness of the top foil 4 is relatively thin, so as to ensure that the top foil 4 maintains good deformability.
Preferably, the first fixing plate 43 is riveted to the bottom foil 2, a plurality of rivets are disposed on the first fixing plate 43, and riveting holes corresponding to the rivets on the first fixing plate 43 are disposed in the radial direction of the bottom foil 2.
In order to improve the wear resistance of the top foil, the wear-resistant coating is arranged on the surface, in contact with the thrust disc, of the top foil 4. The wear-resistant coating can also realize the self-lubricating effect when the rotor and the foil dynamical pressure gas bearing are started and stopped, reduce the coefficients of static friction and dynamic friction and improve the efficiency of the foil dynamical pressure gas bearing.
In this embodiment, the first connection positions of the first fixing end and the third fixing end with the bottom foil 2 are arranged in a staggered manner relative to the second connection positions of the second fixing end with the bottom foil 2, and the first connection positions are located below the inclined plate 42. The first connecting position and the second connecting position are arranged in a staggered manner, so that enough riveting space can be provided for the corrugated foil 3 and the adjusting foil 5, and meanwhile, the second rivet is abutted against the inclined plate 42. As shown in fig. 2 and 4, the present solution is provided with a support cantilever 21 on the bottom foil 2, the support cantilever 21 being located between the first connection position and the second connection position for supporting the swash plate 42. The fourth fixed end of the supporting arm 21 is close to the first connection position, and the fourth free end of the supporting arm 21 can abut against the inclined plate 42.
The supporting cantilever 21 is located in the gas inlet area of the foil dynamic pressure gas bearing, and can support the inclined plate 42, so that the deformation resistance of the top foil 4 under the action of aerodynamic force is improved, the wedge-shaped size of the gas inlet area is basically kept unchanged, the gas quantity entering between the foil dynamic pressure gas bearing and a thrust disc is ensured, the compression quantity of gas is increased, and the bearing capacity of the foil dynamic pressure gas bearing is further improved.
In one embodiment of the present disclosure, the support arm 21 may be a separate component that is welded directly between the first connection location and the second connection location to support the swash plate 42;
in another embodiment of the present disclosure, the supporting cantilever 21 is directly fabricated on the bottom foil 2, that is, the bottom foil 2 is cut, and the cut supporting cantilever 21 is bent to make the fourth free end of the supporting cantilever 21 abut against the sloping plate 42. In this embodiment the base foil 2 has a recess in it for receiving the support cantilever 21.
As shown in fig. 4, the number of support cantilevers 21 is at least equal to the number of top foils 4, i.e. a support cantilever 21 needs to be arranged between each first connection position and each second connection position.
As shown in fig. 4, the number of support booms 21 between each first connection position and second connection position is at least two. Assuming that the number of the top foils 4 is N, the number of the supporting cantilevers 21 between each first connection position and each second connection position is MM ≥ 2, and N and M are positive integers, and the number of the supporting cantilevers 21 is M × N.
The adjusting foil 5 is a flat foil and can be attached to the bottom foil 2 to realize effective support of the wave foil 3 and the top foil 4.
The bump sheet 3 includes a bump sheet body 31 and a second fixing plate 32. The second fixing plate 32 is connected to the first fixing end of the bump foil body 31, and the second fixing plate 32 is connected to the bottom foil 2 and can be attached to the adjustment foil 5.
As shown in fig. 2, rivet holes are provided in both the bump foil 3 and the adjustment foil 5, and the rivet holes of the bump foil 3 correspond to the positions of the rivet holes of the adjustment foil 5.
The second fixing plate 32 and the adjusting foil 5 are connected to the bottom foil 2 in various ways, and specifically, the first fixing plate 43 is riveted, welded or bonded to the bottom foil 2.
Preferably, the second fixing plate 32 is riveted to the bottom foil 2, the second fixing plate 32 is provided with a plurality of rivets, and the bottom foil 2 is provided with riveting holes corresponding to the rivets on the second fixing plate 32 in the radial direction.
In the scheme, the top foil, the bump foil and the adjusting foil are connected with the bottom foil through rivets, so that the foil dynamic pressure gas bearing is simple in manufacturing process and can be produced and applied on a large scale under the condition of low cost.
The top foil, the bump foil and the adjusting foil are connected with the bottom foil by rivets, as shown in fig. 4, the bottom foil is provided with two rows of rivet holes along the direction, wherein the rivet holes for connecting with the top foil are arranged along the radial direction of the bottom foil, and the rivet holes for connecting with the bump foil and the adjusting foil are parallel to the rivet holes for connecting with the top foil.
As shown in fig. 3, the second rivet can abut against the swash plate 42. The second rivet also provides support for the swash plate 42, further improving the resistance of the top foil 4 to deformation under aerodynamic forces.
Preferably, the thickness of the top foil 4 in the present embodiment is 0.1-0.2mm, that is, the thickness of the top foil 4 is relatively thin, so as to ensure that the top foil 4 maintains good deformability, but the inclined plate 42 of the top foil 4 is not substantially deformed under the supporting action of the supporting cantilever and the second rivet, that is, the air inlet is not deformed, and the deformability of the rest positions is not changed.
In this embodiment, the wave foil body 31 is provided with a fine groove.
The fine groove is not limited to a long-bar shape, and may be a circular or other hole.
When the foil dynamical pressure gas bearing works, the raised corrugations on the bump foil 3 deform under the action of gas pressure and gradually approach to a plane, and the thin grooves can deform to absorb the deformation of part of the raised corrugations, so that the failure of the foil dynamical pressure gas bearing caused by the fact that the bump foil 3 is pressed into the plane under the limit condition is avoided.
The fine grooves can also reduce the cost of the bump foil 3, reduce the weight of the bump foil 3, reduce the force borne by the riveted position, and prolong the service life of the bump foil 3.
As shown in fig. 4, the periphery of the bottom foil 2 is provided with a plurality of positioning grooves, the bearing seat 1 is provided with a positioning boss 11 matched with the positioning grooves, and the positioning grooves are matched with the positioning boss 11 to circumferentially fix the bottom foil 2 in the bearing seat 1.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (7)
1. A foil dynamical pressure gas bearing, comprising:
the bearing seat (1) is provided with a first mounting hole matched with the rotor;
the bottom foil (2) is a circular bottom foil and is arranged in the bearing seat (1), and a second mounting hole corresponding to the first mounting hole is formed in the bottom foil (2);
the wave foil pieces (3) are fan-shaped corrugated foil pieces and are positioned on the upper surface of the bottom foil piece (2), the number of the wave foil pieces (3) is at least three, the wave foil pieces are uniformly distributed along the circumference of the second mounting hole, the first end of one radius of each wave foil piece (3) is a first fixed end, the second end of the other radius of each wave foil piece (3) is a first free end, and the first fixed end is connected with the bottom foil piece (2);
the top foil (4) is a fan-shaped flat foil, the top foil (4) corresponds to the wave foil (3) in position and is positioned on the upper layer of the wave foil (3), the top foil (4) is uniformly distributed along the circumference of the second mounting hole, the first end of one radius of the top foil (4) is a second fixed end, the second end of the other radius of the top foil (4) is a second free end, and the second fixed end is connected with the bottom foil (2),
the top foil (4) comprises a top foil body (41), an inclined plate (42) and a first fixing plate (43),
the inclined plate (42) is a rectangular inclined plate or a fan-shaped inclined plate, the inclined plate (42) inclines from the bottom foil (2) to the direction far away from the bottom foil (2), and the first end of the inclined plate (42) is connected with the second fixed end of the top foil body (41);
the first fixing plate (43) is a rectangular fixing plate, the first fixing plate (43) is connected with the second end of the inclined plate (42), the first fixing plate (43) is connected with the bottom foil (2), and the first fixing plate (43) is attached to the bottom foil (2);
the adjusting foil (5) is a fan-shaped flat foil and is used for adjusting the thickness of an inlet air film between the top foil (4) and the thrust disc, the adjusting foil (5) is at least equal to the size of the wave foil (3), the adjusting foil (5) corresponds to the wave foil (3) in position and is located between the wave foil (3) and the bottom foil (2), the adjusting foil (5) is uniformly distributed along the circumference of the second mounting hole, the first end of one radius of the adjusting foil (5) is a third fixed end, the second end of the other radius of the adjusting foil (5) is a third free end, and the third fixed end is connected with the bottom foil (2),
the first connecting position of the first fixed end and the third fixed end with the bottom foil (2) is arranged in a staggered way relative to the second connecting position of the second fixed end with the top foil (4), and the first connecting position is positioned below the inclined plate (42),
a support cantilever (21) is arranged on the bottom foil (2) and is positioned between the first connection position and the second connection position,
the fourth fixed end of the supporting cantilever (21) is close to the first connecting position, and the fourth free end of the supporting cantilever (21) can abut against the inclined plate (42).
2. Foil hydrodynamic gas bearing according to claim 1, characterized in that the bottom foil (2) is provided with a groove for accommodating the support arm (21).
3. Foil hydrodynamic gas bearing according to claim 1, characterized in that the number of support cantilevers (21) is at least two and is arranged in the radial direction of the bottom foil (2).
4. Foil hydrodynamic gas bearing according to claim 1, characterized in that the first fixing plate (43) is connected to the bottom foil (2) by means of first rivets.
5. Foil hydrodynamic gas bearing according to claim 1, characterized in that the adjusting foil (5) is adapted to be attached to the bottom foil (2);
the bump sheet (3) comprises a bump sheet body (31) and a second fixing plate (32),
the second fixing plate (32) is connected with a first fixing end of the wave foil body (31), and the second fixing plate (32) is connected with the bottom foil (2) and can be attached to the adjusting foil (5).
6. Foil hydrodynamic gas bearing according to claim 5, characterized in that the second fixing plate (32) is connected to the bottom foil (2) by means of a second rivet which can be brought against the swash plate (42);
the corrugated foil body (31) is provided with a fine groove.
7. The foil hydrodynamic gas bearing according to claim 1, characterized in that the bottom foil (2) has a plurality of positioning grooves formed on its outer circumference;
and the bearing seat (1) is provided with a positioning boss (11) matched with the positioning groove.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010818095.3A CN111963571B (en) | 2020-08-14 | 2020-08-14 | Foil dynamic pressure gas bearing |
| PCT/CN2020/115729 WO2022032798A1 (en) | 2020-08-14 | 2020-09-17 | Foil dynamic pressure gas bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010818095.3A CN111963571B (en) | 2020-08-14 | 2020-08-14 | Foil dynamic pressure gas bearing |
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| Publication Number | Publication Date |
|---|---|
| CN111963571A CN111963571A (en) | 2020-11-20 |
| CN111963571B true CN111963571B (en) | 2022-02-08 |
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|---|---|---|---|
| CN202010818095.3A Active CN111963571B (en) | 2020-08-14 | 2020-08-14 | Foil dynamic pressure gas bearing |
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| CN (1) | CN111963571B (en) |
| WO (1) | WO2022032798A1 (en) |
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| KR102289217B1 (en) * | 2021-03-31 | 2021-08-13 | 주식회사 뉴로스 | Air foil thrust bearing |
| CN114233746A (en) * | 2021-12-21 | 2022-03-25 | 中车株洲电机有限公司 | Dynamic pressure gas thrust bearing |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5833369A (en) * | 1997-03-28 | 1998-11-10 | Mohawk Innovative Technology, Inc. | High load capacity compliant foil hydrodynamic thrust bearing |
| CN203431003U (en) * | 2013-08-30 | 2014-02-12 | 哈尔滨东安发动机（集团）有限公司 | Axial aero dynamic bearing |
| CN107208694A (en) * | 2015-02-10 | 2017-09-26 | 株式会社 Ihi | Thrust bearing |
| CN108253013A (en) * | 2017-12-13 | 2018-07-06 | 湖南大学 | It is a kind of can adaptively and with high bearing capacity thrust air foil bearing |
| CN111156245A (en) * | 2019-12-31 | 2020-05-15 | 宙斯能源动力科技(大连)有限公司 | Gas foil bearing adopting flat plate support |
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| US5871284A (en) * | 1997-09-10 | 1999-02-16 | Alliedsignal Inc. | Foil thrust bearing set |
| KR100964883B1 (en) * | 2009-10-07 | 2010-06-23 | 주식회사 뉴로스 | Thrust foil air bearing |
| JP5472170B2 (en) * | 2011-03-18 | 2014-04-16 | 株式会社島津製作所 | Dynamic pressure gas bearing |
| JP6268847B2 (en) * | 2013-09-19 | 2018-01-31 | 株式会社Ihi | Thrust bearing |
| CN108286567B (en) * | 2018-03-06 | 2023-08-29 | 河北金士顿科技有限责任公司 | Thrust foil dynamic pressure air bearing with thick top foil structure |
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2020
- 2020-08-14 CN CN202010818095.3A patent/CN111963571B/en active Active
- 2020-09-17 WO PCT/CN2020/115729 patent/WO2022032798A1/en active Application Filing
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5833369A (en) * | 1997-03-28 | 1998-11-10 | Mohawk Innovative Technology, Inc. | High load capacity compliant foil hydrodynamic thrust bearing |
| CN203431003U (en) * | 2013-08-30 | 2014-02-12 | 哈尔滨东安发动机（集团）有限公司 | Axial aero dynamic bearing |
| CN107208694A (en) * | 2015-02-10 | 2017-09-26 | 株式会社 Ihi | Thrust bearing |
| CN108253013A (en) * | 2017-12-13 | 2018-07-06 | 湖南大学 | It is a kind of can adaptively and with high bearing capacity thrust air foil bearing |
| CN111156245A (en) * | 2019-12-31 | 2020-05-15 | 宙斯能源动力科技(大连)有限公司 | Gas foil bearing adopting flat plate support |
Also Published As
| Publication number | Publication date |
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| CN111963571A (en) | 2020-11-20 |
| WO2022032798A1 (en) | 2022-02-17 |
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