Thrust bearing, compressor and air conditioner
阅读说明:本技术 推力轴承、压缩机以及空调 (Thrust bearing, compressor and air conditioner ) 是由 张治平 钟瑞兴 陈玉辉 于 2020-08-26 设计创作,主要内容包括:本发明公开了一种推力轴承、压缩机以及空调,涉及压缩机领域,用以提高推力轴承的动压性能。该推力轴承包括壳体和节流器。壳体具有贯穿的通孔,且壳体的通孔沿着轴向的一侧表面设置有内凹部,内凹部的底部都设置有贯穿壳体轴向方向的通气孔。节流器固定于内凹部中,节流器远离内凹部底部的一侧设置有第一区域;第一区域被构造为形成厚度变化的气膜。上述技术方案所提供的推力轴承,提高了推力轴承的动压性能,增加了推力轴承的承载力,增强了推力轴承的抗冲击性。(The invention discloses a thrust bearing, a compressor and an air conditioner, relates to the field of compressors, and aims to improve the dynamic pressure performance of the thrust bearing. The thrust bearing includes a housing and a restrictor. The casing has the through-hole that runs through, and the through-hole of casing is provided with interior concave part along axial one side surface, and the bottom of interior concave part all is provided with the air vent that runs through casing axial direction. The throttle is fixed in the inner concave part, and a first area is arranged on one side of the throttle, which is far away from the bottom of the inner concave part; the first region is configured to form a gas film of varying thickness. The thrust bearing provided by the technical scheme improves the dynamic pressure performance of the thrust bearing, increases the bearing capacity of the thrust bearing and enhances the impact resistance of the thrust bearing.)
1. A thrust bearing, comprising:
the air conditioner comprises a shell (1) and a fan, wherein the shell (1) is provided with a through hole (11) in a penetrating mode, an inner concave part (12) is arranged on one side surface of the through hole (11) of the shell (1) along the axial direction, and vent holes (13) penetrating through the shell (1) in the axial direction are formed in the bottom of the inner concave part (12); and
the flow restrictor (2) is fixed in the concave part (12), and a first region (21) is arranged on one side, away from the bottom of the concave part (12), of the flow restrictor (2); the first region (21) is configured to form a gas film of varying thickness.
2. A thrust bearing according to claim 1, characterized in that the side of the restrictor (2) remote from the bottom of the recess (12) is further provided with a second region (22), the second region (22) being adjacent to the first region (21);
wherein the second region (22) is located downstream of the first region (21) in the direction of rotation of the rotor on which the thrust bearing is mounted.
3. A thrust bearing according to claim 2, wherein the second region (22) is provided with air grooves (22 a).
4. A thrust bearing according to claim 3, wherein the second regions (22) are provided in rows with the air grooves (22a) recessed inwards.
5. A thrust bearing according to claim 4, wherein the air groove (22a) is configured as one of: herringbone grooves, spiral grooves and trapezoidal grooves.
6. A thrust bearing according to claim 5, wherein the intersection of two grooves of the herringbone groove is located downstream of the other region of the two grooves themselves.
7. A thrust bearing according to claim 1 or 2, wherein the first region (21) forms a film of gas having a thickness which tapers in the direction of rotation of the rotor on which the thrust bearing is mounted.
8. A thrust bearing according to claim 2, characterized in that the first region (21) is configured as a ramp and that the first region (21) is connected to the second region (22) on one side higher than the other side of the first region (21).
9. A thrust bearing according to claim 8, wherein the angle of inclination of the ramp is from 3 ° to 6 °.
10. The thrust bearing according to claim 8, wherein a height of a side of the first region (21) connected to the second region (22) is higher than another side of the first region (21) by 15 μm to 25 μm.
11. A thrust bearing according to claim 1 or 2, wherein a plurality of the inner recesses (12) are provided along a circumferential direction of the housing (1), at least one of the flow restrictors (2) is fixed in each of the inner recesses (12), and the bottom of each of the inner recesses (12) is provided with the vent hole (13).
12. Thrust bearing according to claim 1, characterized in that the material of the restrictor (2) is isostatic graphite or sintered porous material.
13. A compressor comprising the thrust bearing as set forth in any one of claims 1 to 12.
14. An air conditioner characterized by comprising the compressor of claim 13.
Technical Field
The invention relates to the field of compressors, in particular to a thrust bearing, a compressor and an air conditioner.
Background
The compressor comprises a gas static pressure thrust bearing and a thrust disc which are jointed. The gas static pressure thrust bearing takes gas as a lubricating medium, and high-pressure gas flows into the thrust bearing after passing through the restrictor. The gas forms a gas film with a certain pressure distribution between the thrust bearing and the thrust disk, and a gas film force for balancing the axial force is generated.
Disclosure of Invention
The invention provides a thrust bearing, a compressor and an air conditioner, which are used for improving the dynamic pressure performance of the thrust bearing.
Some embodiments of the present invention provide a thrust bearing, comprising:
the shell is provided with a through hole, an inner concave part is arranged on one side surface of the through hole of the shell along the axial direction, and vent holes penetrating through the shell in the axial direction are formed in the bottom of the inner concave part; and
the throttle is fixed in the inner concave part, and a first area is arranged on one side of the throttle, which is far away from the bottom of the inner concave part; the first region is configured to form a gas film of varying thickness.
In some embodiments, a side of the restrictor, which is far away from the bottom of the concave part, is further provided with a second region, and the second region is adjacent to the first region;
wherein the second region is located downstream of the first region in a rotational direction of a rotor on which the thrust bearing is mounted.
In some embodiments, the second region is provided with an air slot.
In some embodiments, the second regions are provided in rows with inwardly recessed air slots.
In some embodiments, the gas cell is configured as one of: herringbone grooves, spiral grooves and trapezoidal grooves.
In some embodiments, the intersection of two slots of said herringbone slot is located downstream of the other region of said two slots themselves.
In some embodiments, the first region forms a film having a thickness that gradually decreases in a rotational direction of a rotor on which the thrust bearing is mounted.
In some embodiments, the first region is configured as a slope, and one side of the first region connected to the second region is higher than the other side of the first region.
In some embodiments, the slope angle is 3 ° to 6 °.
In some embodiments, the height of the side of the first region connected to the second region is 15 to 25 μm higher than the other side of the first region.
In some embodiments, a plurality of the inner recesses are provided along a circumferential direction of the housing, at least one of the flow restrictors is fixed in each of the inner recesses, and the vent hole is provided at a bottom of each of the inner recesses.
In some embodiments, the material of the restrictor is isostatic graphite.
Other embodiments of the present invention provide a compressor including the thrust bearing according to any of the above aspects of the present invention.
Still other embodiments of the present invention provide an air conditioner including the compressor according to any one of the above aspects of the present invention.
According to the thrust bearing provided by the technical scheme, the throttler is arranged in the concave part of the shell of the thrust bearing, the throttler is provided with the first area, after the thrust bearing is arranged on the compressor, an air film with variable thickness can be formed between the thrust bearing and the thrust disc, the thickness of the air film can influence the magnitude of the air film force, and when the rotating speed of the compressor is high, the air film force is large; when the rotating speed of the compressor is small, the gas film force is small. The performance enables the air film force provided by the air film to be related to the rotating speed of the compressor, so that the dynamic pressure performance of the thrust bearing is improved, the bearing capacity of the thrust bearing is increased, and the impact resistance of the thrust bearing is enhanced. And the thrust bearing adopts gas lubrication, so that the energy loss of the thrust bearing is reduced, and the energy utilization rate of the compressor is integrally improved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
FIG. 1 is a schematic diagram of a thrust bearing according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a thrust bearing restrictor in a front view according to an embodiment of the present invention;
fig. 3 is a schematic top view of a thrust bearing restrictor according to an embodiment of the present invention.
Detailed Description
The technical solution provided by the present invention is explained in more detail with reference to fig. 1 to 3.
Referring to fig. 1, some embodiments of the present invention provide a thrust bearing comprising a
The
The
The
According to the thrust bearing provided by the technical scheme, the
In some embodiments, the side of the
For each
The thrust bearing provided by the technical scheme is an aerostatic thrust bearing, but has good dynamic pressure effect, good impact resistance and larger bearing capacity, so that the dynamic pressure performance of the thrust bearing and the provided bearing capacity are related to the air supply pressure and the rotating speed of the compressor, the bearing capacity is increased along with the increase of the air supply pressure and is increased along with the increase of the rotating speed, and the thrust bearing can better adapt to the requirements of the complex working conditions of the refrigeration compressor on the performance of the thrust bearing.
Referring to fig. 1 and 2, in some embodiments, the
The
Referring to fig. 1 and 2, in some embodiments, the intersection of two slots of the herringbone slot is located downstream of other areas of each
Referring to fig. 1 and 2, in some embodiments, the
Referring to fig. 1 and 2, in some embodiments, the slope angle a of the ramp is 3 ° to 6 °.
Referring to fig. 1 and 2, in some embodiments, the height of one side of the
Referring to fig. 1 and 2, in some embodiments, a plurality of
Other embodiments of the present invention provide a compressor including the thrust bearing according to any of the above aspects of the present invention.
The compressor also comprises a thrust disc, the thrust disc and the side of the thrust bearing provided with the
Still other embodiments of the present invention provide an air conditioner including the compressor according to any one of the above aspects of the present invention.
In the description of the present invention, it is to be understood that the terms "central", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be considered as limiting the scope of the present invention.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: it is to be understood that modifications may be made to the technical solutions described in the foregoing embodiments, or equivalents may be substituted for some of the technical features thereof, but such modifications or substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
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