CN114688153A - Thrust bearing and air conditioning unit - Google Patents

Thrust bearing and air conditioning unit Download PDF

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Publication number
CN114688153A
CN114688153A CN202011567345.7A CN202011567345A CN114688153A CN 114688153 A CN114688153 A CN 114688153A CN 202011567345 A CN202011567345 A CN 202011567345A CN 114688153 A CN114688153 A CN 114688153A
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CN
China
Prior art keywords
bearing
dynamic pressure
disc
air
thrust bearing
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
Application number
CN202011567345.7A
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Chinese (zh)
Inventor
雷连冬
钟瑞兴
陈玉辉
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Gree Electric Appliances Inc of Zhuhai
Original Assignee
Gree Electric Appliances Inc of Zhuhai
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Gree Electric Appliances Inc of Zhuhai filed Critical Gree Electric Appliances Inc of Zhuhai
Priority to CN202011567345.7A priority Critical patent/CN114688153A/en
Publication of CN114688153A publication Critical patent/CN114688153A/en
Pending legal-status Critical Current

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Classifications

    • 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
    • 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
    • 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
    • F16C32/0618—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 via porous material
    • 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
    • F16C32/0622—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 via nozzles, restrictors
    • 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
    • F16C32/0681—Construction or mounting aspects of hydrostatic bearings, for exclusively rotary movement, related to the direction of load
    • F16C32/0692—Construction or mounting aspects of hydrostatic bearings, for exclusively rotary movement, related to the direction of load for axial load only
    • 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
    • F16C33/72—Sealings
    • F16C33/74—Sealings 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)
  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Support Of The Bearing (AREA)

Abstract

The invention provides a thrust bearing and an air conditioning unit. The thrust bearing includes a bearing disk, a rotor disk, and a dynamic pressure bearing member, the rotor disk being rotatable relative to the bearing disk. Wherein the dynamic pressure bearing piece is arranged between the bearing disk and the rotor disk, and the dynamic pressure bearing piece is used for providing dynamic pressure support for the rotor disk. The dynamic pressure bearing part comprises a wave foil and a top foil, the wave foil is arranged on a bearing disc, the top foil is arranged on the wave foil, and a dynamic pressure air hole is formed in the bearing disc. The dynamic pressure air holes are formed in the bearing disc, so that air is supplied to the wave foils through the dynamic pressure air holes to provide supporting force for the wave foils, the rigidity of the wave foils can be improved, and the dynamic pressure supporting rigidity of the thrust bearing is improved.

Description

Thrust bearing and air conditioning unit
Technical Field
The invention relates to the technical field of mechanical parts, in particular to a thrust bearing and an air conditioning unit.
Background
The gas lubrication bearing uses gas as a lubricant, and utilizes the characteristics of gas such as adsorptivity, transmission property, diffusivity, viscosity, heat conductivity, compressibility and the like, and during friction, a gas film is formed under the action of a fluid dynamic pressure effect and a static pressure effect to support load and reduce friction. The gas lubrication technology was first proposed in the middle of the nineteenth century and developed rapidly in the middle of the 20 th century, and its appearance breaks the dominance of the liquid lubrication technology, so that the lubrication technology makes a qualitative leap. The gas bearing is a novel bearing produced based on the high and new lubrication technology, has a series of advantages of small friction loss, good stability, small vibration, oil-free lubrication and the like, and has very wide application prospects in the fields of high-speed turbines, machine tool manufacturing, space technology and the like.
The dynamic pressure gas bearing, the static pressure gas bearing and the extrusion type gas bearing are classified according to the generation mechanism of the lubricating gas film. Among them, the foil type dynamic pressure gas bearing is the most studied in the literature at present, and the small hole throttling hydrostatic bearing and the porous hydrostatic bearing are the most studied hydrostatic gas bearings. A typical wave foil type dynamic pressure gas thrust bearing mainly comprises a bearing disc, a wave foil piece and a top layer foil piece, wherein the wave foil piece and the top layer foil piece are uniformly distributed in the circumferential direction as fan-shaped thrust pads. The corrugated foil has a special wave-shaped structure, which acts as a spring-like elastic support and is the main source of stiffness and damping of the thrust bearing. The top foil is mounted on top of the bump foil, both constituting the flexible support surface of the foil thrust bearing. The bump foil piece is the same as the top layer foil piece, one end of the bump foil piece is fixed on the bearing seat, and the other end of the bump foil piece can freely slide under the bearing force. A certain included angle is formed between the front end of the top foil and the bearing shell, the rear end of the top foil is parallel to the bearing shell, and an air film is formed through a dynamic pressure principle under the effect of the included angle.
When the wave foil type dynamic pressure gas bearing works, the rotor disc rotates at a high speed, and when the designed rotating speed is reached, a dynamic pressure gas film is formed in the gap to support the rotor disc to rotate. However, in this process, the top foil presses the wave foil under the pressure of the dynamic pressure gas film, so that the wave foil is easily deformed, and the wave foil cannot be recovered and fails in the past for a long time, thereby affecting the operation of the wave foil type dynamic pressure gas bearing.
Disclosure of Invention
The embodiment of the invention provides a thrust bearing and an air conditioning unit, and aims to solve the technical problem that a bump foil is easy to deform and lose efficacy in a thrust bearing in the prior art.
An embodiment of the present invention provides a thrust bearing, including: a bearing disk; a rotor disc rotatable relative to the bearing disc; a dynamic pressure bearing member mounted between the bearing disk and the rotor disk, the dynamic pressure bearing member for providing a dynamic pressure support to the rotor disk, the dynamic pressure bearing member comprising: the bump foil is arranged on the bearing disc; a top foil mounted on the bump foil; the bearing disc is provided with dynamic pressure air holes, and the dynamic pressure air holes supply air to provide supporting force for the corrugated foils.
In one embodiment, the bump foil comprises wave structures and straight structures connected between the wave structures, the dynamic pressure air holes correspond to the straight structures, and the dynamic pressure air holes supply supporting force to the straight structures.
In one embodiment, the hydrodynamic gas holes correspond to the middle of the straight edge structure.
In one embodiment, an air storage cavity is formed in the bearing disc, an air inlet communicated with the air storage cavity is formed in the bearing disc, and the dynamic pressure air hole is communicated with the air storage cavity.
In one embodiment, the air reservoir chambers are distributed in the form of sectors or circular rings in the bearing disk.
In one embodiment, the bearing disc comprises a disc body and a base, the air reservoir being formed between the disc body and the base, and the air inlet opening in the base.
In one embodiment, a sealing member is disposed between the tray body and the base.
In one embodiment, the thrust bearing further comprises: the static pressure bearing part is arranged on the bearing disc and positioned between the bearing disc and the rotor disc, a static pressure air hole is further formed in the static pressure bearing part, and the static pressure bearing part supplies air to the rotor disc through the static pressure air hole to support static pressure.
In one embodiment, the hydrostatic bearing elements are annularly arranged.
In one embodiment, the hydrostatic bearing elements comprise an inner ring hydrostatic bearing element and an outer ring hydrostatic bearing element, the inner and outer ring hydrostatic bearing elements being concentrically arranged, the outer ring hydrostatic bearing element having a diameter greater than the diameter of the inner ring hydrostatic bearing element.
In one embodiment, the dynamic pressure bearing member is disposed between the inner and outer ring static pressure bearing members.
The invention also provides an air conditioning unit, which comprises the thrust bearing.
In the above embodiment, in operation, the rotor disc rotates at a high speed, and when the designed rotation speed is reached, a dynamic pressure film is formed in the gap to support the rotor disc to rotate. In the process, the wave foil is easy to deform when the top foil abuts against the wave foil, and the dynamic pressure air holes are formed in the bearing disc, so that air is supplied to the wave foil through the dynamic pressure air holes to provide supporting force for the wave foil, the rigidity of the wave foil can be improved, and the dynamic pressure supporting rigidity of the thrust bearing is improved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a front view and a perspective cross-sectional structural schematic view of an embodiment of a thrust bearing according to the present invention;
FIG. 2 is a cross-sectional view taken at A-A of the thrust bearing of FIG. 1 and an enlarged schematic view thereof;
FIG. 3 is a schematic cross-sectional view at B-B of the thrust bearing of FIG. 1;
FIG. 4 is a schematic cross-sectional view at C-C of the thrust bearing of FIG. 3;
fig. 5 is a partial perspective view of the thrust bearing of fig. 4.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the following embodiments and the accompanying drawings. The exemplary embodiments and descriptions of the present invention are provided to explain the present invention, but not to limit the present invention.
In order to solve the technical problem that the bump foil of the suspension thrust bearing in the prior art is easy to deform and fail, the invention provides a thrust bearing, as shown in fig. 1, 2 and 5, which comprises a bearing disk 10, a rotor disk 20 and a dynamic pressure bearing piece 40, wherein the rotor disk 20 can rotate relative to the bearing disk 10. Wherein a dynamic pressure bearing member 40 is installed between the bearing disk 10 and the rotor disk 20, the dynamic pressure bearing member 40 is used for providing dynamic pressure support to the rotor disk 20. The dynamic pressure bearing member 40 includes a bump foil 42 and a top foil 41, the bump foil 42 being provided on the bearing disk 10, the top foil 41 being mounted on the bump foil 42. The bearing disk 10 is provided with a dynamic pressure air hole 11, and the dynamic pressure air hole 11 supplies air to provide a supporting force for the corrugated foil 42.
When mounted, the bump foil 42 is typically fixed to the bearing disk 10 by means of spot welding. When the rotor disc 20 is operated at a high speed relative to the bearing disc 10, the air flow is driven to generate an air film between the bearing disc 10 and the top foil 41, so that the dynamic pressure support is realized. A fitting gap, i.e. h in fig. 2, is formed between the bottom end of the rotor disc 20 and the top of the top foil 41. In operation, the rotor disc 20 rotates at a high speed, and when the designed rotation speed is reached, a dynamic pressure film is formed in the gap h to support the rotor disc 20 to rotate. In the process, the top foil 41 presses the wave foil 42 to enable the wave foil 42 to be easily deformed, and the dynamic pressure air holes 11 are formed in the bearing disc 10 to enable the dynamic pressure air holes 11 to supply air to support the wave foil 42, so that the rigidity of the wave foil 42 can be improved, and the dynamic pressure support rigidity of the thrust bearing can be improved.
As shown in fig. 2, in the solution of the present embodiment, the bump foil 42 includes a waveform structure 421 and a straight structure 422 connected between the waveform structure 421, the dynamic pressure air holes 11 correspond to the straight structure 422, and the dynamic pressure air holes 11 provide a supporting force for the straight structure 422. In operation, the bump foil 42 receives a reaction force while forming the gas film support, so that the straight-edge structure 422 is tightly attached to the bearing disc 10, the high-pressure gas is provided through the dynamic pressure gas hole 11 to form a support for the straight-edge structure 422, and the reaction force of a part of the support force is counteracted, so that the bump foil 42 can provide greater rigidity.
More preferably, the dynamic pressure air hole 11 corresponds to the middle portion of the straight structure 422. It should be noted that the middle portion of the straight-edge structure 422 is the middle portion of the straight-edge structure 422 in the length direction. Most preferably, the central portion is the central location of the straight edge structure 422. Alternatively, the middle portion may be at other positions along the center line of the straight-edge structure 422.
Optionally, the dynamic pressure air hole 11 is formed by laser drilling, and the diameter of the dynamic pressure air hole 11 is 15-50 um. It should be noted that, in the technical solution of the present invention, the distribution number of the static pressure air holes 31 and the dynamic pressure air holes 11 may be adjusted correspondingly according to actual working requirements.
As shown in fig. 1 and 3, in the technical solution of the present embodiment, an air storage cavity c is formed in the bearing disk 10, an air inlet hole c1 communicated with the air storage cavity c is opened on the bearing disk 10, and the dynamic pressure air hole 11 is communicated with the air storage cavity c. Thus, the high-pressure gas from the gas storage chamber c is formed by the throttling action of the dynamic pressure gas hole 11, and the corrugated foil 42 can be supported better.
As shown in fig. 2 and 5, in the present embodiment, the top foil 41 has a tile shape, and 8 pieces of top foil are uniformly distributed in the circumferential direction. In order to form the dynamic pressure effect, the top foil 41 includes an inclined plane 411 and a straight plane 412, and the included angle formed between the inclined plane 411 and the straight plane is a supplementary angle theta, and theta is generally 2-8 degrees. Wherein, the inclined plane 411 of the top foil 41 is mainly used for promoting the dynamic pressure effect, and the fit clearance between the straight plane 412 of the top foil 41 and the bottom surface of the rotor disc 20 forms a gas film to play a main supporting role for the rotor disc 20. The wave foil 42 is matched with the top foil 41 in structure, and the dynamic pressure bearing wave foils 42 are in tile shapes and are uniformly distributed in 8 in the circumferential direction. Similarly, in order to form a dynamic pressure effect, and the inclined plane 411 of the top foil 41 and the straight plane 412 of the top foil 41 are matched, as shown in fig. 2, a waveform 421a, a waveform 421b, a waveform 421c, and a waveform structure 421 serving as a main supporting function are provided at different heights, the waveform 421a, the waveform 421b, the waveform 421c are used for supporting the inclined plane 411, and the waveform structure 421 is used for supporting the straight plane 412.
Preferably, in the solution of the present embodiment, the air storage cavities c are distributed in the bearing disc 10 in a circular ring shape. As a further alternative, the air reservoirs c may also be distributed in the form of sectors in the bearing disk 10.
As shown in fig. 1, the bearing plate 10 includes a plate body 12 and a base 13, an air reservoir c is formed between the plate body 12 and the base 13, and an air intake hole c1 is opened in the base 13. In the technical scheme of the embodiment, the air storage cavity c is processed on the base 13, and the tray body 12 covers the base 13. More preferably, a sealing member 14 is provided between the tray 12 and the base 13 in order to ensure the sealing between the tray 12 and the base 13.
As an alternative embodiment, the air reservoir c may be machined into both the tray 12 and the base 13.
Generally, a wave foil type dynamic pressure gas thrust bearing belongs to a dynamic pressure sliding bearing, under the dynamic pressure effect, the bearing capacity of the bearing is higher as the rotating speed is higher, but in the starting and stopping processes, due to insufficient rotating speed, a gas film cannot be formed through the dynamic pressure principle, and at the moment, the top foil of the bearing generates dry friction with a rotor, so that the service life of the bearing is influenced. Therefore, in the technical solution of the present invention, the thrust bearing further includes a static pressure bearing member 30, the static pressure bearing member 30 is disposed on the bearing disc 10 and located between the bearing disc 10 and the rotor disc 20, the static pressure bearing member 30 is further provided with a static pressure air hole 31, and the static pressure bearing member 30 supplies air to support the rotor disc 20 through the static pressure air hole 31. When the rotor disc 20 is started, stopped and in a low-speed stage, the static pressure air holes 31 on the static pressure bearing piece 30 are used for supplying air to provide static pressure support for the rotor disc 20 so as to avoid dry friction, and the advantages of large bearing capacity, stable work, long service life and the like of the static pressure bearing are utilized; at higher rotor disk 20 speeds, dynamic pressure support is provided to rotor disk 20 by dynamic pressure bearing members 40 to provide greater stiffness and damping. Therefore, the thrust bearing of the invention can run at high speed and low speed, and the using effect of the thrust bearing is improved.
The static pressure vent 31 is also communicated with the air storage chamber c. Thus, the high-pressure gas from the gas storage chamber c forms high-pressure gas through the throttling action of the static pressure gas hole 31, and the rotor disc 20 can be better supported. More preferably, in the technical solution of the present invention, the static pressure air holes 31 and the dynamic pressure air holes 11 are all plural, and the distribution density can be adjusted correspondingly according to actual working requirements. The reason for providing the air storage chamber c is to store a part of high-pressure air, so as to avoid the air cut-off situation during static pressure use. The air inlet hole c1 is connected to an external air supply flow passage and an air supply system when in use, and the air supply flow passage and the air supply system are not described in detail since the patent mainly relates to a bearing structure.
In addition, because the dynamic and static pressure mixed gas thrust bearing of the technical scheme of the invention adopts an integrated design, namely the dynamic pressure gas thrust bearing and the static pressure gas thrust bearing are designed into a bearing, the compact structure of the bearing is effectively improved.
As shown in fig. 3 and 4, in the solution of the present embodiment, the hydrostatic bearing member 30 is provided in an annular shape. In order to allow the static pressure bearing member 30 to support the rotor disk 20 more stably, the static pressure bearing member 30 includes an inner ring static pressure bearing member 30a and an outer ring static pressure bearing member 30b, the inner ring static pressure bearing member 30a and the outer ring static pressure bearing member 30b are concentrically arranged, and the diameter of the outer ring static pressure bearing member 30b is larger than that of the inner ring static pressure bearing member 30 a. By adopting the structure, the rotor disc 20 can be prevented from inclining, and more stable support is realized. As other alternative embodiments, the hydrostatic bearing member 30 may be designed with a greater number of rings. The supporting area of the hydrostatic bearing member 30 can be selected as appropriate according to design requirements.
As other alternative embodiments, the static pressure bearing member 30 may not be disposed in a complete ring shape, and the static pressure bearing member 30 may also be disposed in an arc shape. More preferably, the static pressure bearing member 30 having an arc shape may be provided in multiple stages, so as to stably support the rotor disk 20.
As shown in fig. 3, in the solution of the present embodiment, the dynamic pressure bearing member 40 is provided between the inner ring static pressure bearing member 30a and the outer ring static pressure bearing member 30 b. Therefore, the space on the thrust bearing can be fully utilized, and the structure of the thrust bearing is more compact.
In the present embodiment, the hydrostatic bearing member 30 is a porous hydrostatic bearing made of graphite, and numerous hydrostatic air holes 31 are distributed in the hydrostatic bearing member 30. As shown in fig. 4, the static pressure vents 31 are typically 20-50um in actual diameter. A ring-shaped groove is formed on the surface of the bearing disk 10, and the hydrostatic bearing member 30 is mounted on the bearing disk 10 through the ring-shaped groove, and is generally bonded and sealed to the radial surface using a high-temperature adhesive. During operation, high-pressure gas from the gas storage cavity c enters the static pressure bearing piece 30 along the axial direction through the gas port and flows to the static pressure gas hole 31, and the gas is extruded to further increase the pressure due to the small diameter of the static pressure gas hole 31, so that a gas film is formed, and the rotor is supported. As another alternative embodiment, the hydrostatic bearing member 30 may be a small bore throttling type hydrostatic bearing.
The invention also provides an air conditioning unit which comprises the thrust bearing. The air conditioning unit adopting the thrust bearing can ensure better stability when running at low power or high power.
From the above, the technical scheme of the invention realizes the full-speed region friction-free operation of the bearing by providing the dynamic and static pressure mixed high-rigidity gas thrust bearing, and the bearing has compact structure and higher rigidity.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes may be made to the embodiment of the present invention by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (12)

1. A thrust bearing, comprising:
a bearing disc (10);
a rotor disc (20) rotatable relative to the bearing disc (10);
a dynamic pressure bearing piece (40) mounted between the bearing disk (10) and the rotor disk (20), the dynamic pressure bearing piece (40) for providing dynamic pressure support to the rotor disk (20), the dynamic pressure bearing piece (40) comprising:
a bump foil (42) provided on the bearing disk (10);
a top foil (41) mounted on the bump foil (42);
the bearing disc (10) is provided with dynamic pressure air holes (11), and the dynamic pressure air holes (11) supply air to provide supporting force for the corrugated foils (42).
2. Thrust bearing according to claim 1, characterized in that said bump foil (42) comprises wave-shaped structures (421) and straight-sided structures (422) connected between said wave-shaped structures (421), said hydrodynamic gas holes (11) corresponding to said straight-sided structures (422), said hydrodynamic gas holes (11) supplying gas to provide a supporting force to said straight-sided structures (422).
3. Thrust bearing according to claim 2, characterized in that said dynamic pressure gas hole (11) corresponds to the middle of said straight edge structure (422).
4. The thrust bearing according to claim 1, characterized in that an air storage cavity (c) is formed in the bearing disc (10), an air inlet hole (c1) communicated with the air storage cavity (c) is formed in the bearing disc (10), and the dynamic pressure air hole (11) is communicated with the air storage cavity (c).
5. Thrust bearing according to claim 4, characterized in that the air reservoir chambers (c) are distributed in the bearing disc (10) in a sector or circular ring shape.
6. Thrust bearing according to claim 5, characterized in that said bearing disc (10) comprises a disc body (12) and a base (13), said air reservoir chamber (c) being formed between said disc body (12) and said base (13), said air intake opening (c1) opening on said base (13).
7. Thrust bearing according to claim 6, characterized in that a sealing member (14) is provided between the disc (12) and the seat (13).
8. The thrust bearing of claim 1, further comprising: the static pressure bearing piece (30), the static pressure bearing piece (30) set up on bearing disc (10), and be located bearing disc (10) with between rotor disc (20), static pressure gas pocket (31) have still been seted up on static pressure bearing piece (30), static pressure bearing piece (30) pass through static pressure gas pocket (31) air feed is right rotor disc (20) provide the static pressure and support.
9. Thrust bearing according to claim 8, characterized in that the hydrostatic bearing member (30) is annular.
10. Thrust bearing according to claim 9, characterized in that said hydrostatic bearing elements (30) comprise an inner ring hydrostatic bearing element (30a) and an outer ring hydrostatic bearing element (30b), said inner ring hydrostatic bearing element (30a) and said outer ring hydrostatic bearing element (30b) being arranged concentrically, said outer ring hydrostatic bearing element (30b) having a diameter greater than the diameter of said inner ring hydrostatic bearing element (30 a).
11. Thrust bearing according to claim 10, characterized in that said hydrodynamic bearing member (40) is arranged between said inner annular hydrostatic bearing member (30a) and said outer annular hydrostatic bearing member (30 b).
12. An air conditioning assembly comprising a thrust bearing, characterized in that the thrust bearing is as claimed in any one of claims 1 to 11.
CN202011567345.7A 2020-12-25 2020-12-25 Thrust bearing and air conditioning unit Pending CN114688153A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202011567345.7A CN114688153A (en) 2020-12-25 2020-12-25 Thrust bearing and air conditioning unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202011567345.7A CN114688153A (en) 2020-12-25 2020-12-25 Thrust bearing and air conditioning unit

Publications (1)

Publication Number Publication Date
CN114688153A true CN114688153A (en) 2022-07-01

Family

ID=82130073

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202011567345.7A Pending CN114688153A (en) 2020-12-25 2020-12-25 Thrust bearing and air conditioning unit

Country Status (1)

Country Link
CN (1) CN114688153A (en)

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