CN113107907A - Compressor and air conditioning system - Google Patents
Compressor and air conditioning system Download PDFInfo
- Publication number
- CN113107907A CN113107907A CN202010022394.6A CN202010022394A CN113107907A CN 113107907 A CN113107907 A CN 113107907A CN 202010022394 A CN202010022394 A CN 202010022394A CN 113107907 A CN113107907 A CN 113107907A
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- China
- Prior art keywords
- bearing
- elastic cushion
- air
- rotating shaft
- compressor
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- 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.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/668—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps damping or preventing mechanical vibrations
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/05—Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
- F04D29/056—Bearings
- F04D29/0563—Bearings cartridges
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/05—Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
- F04D29/056—Bearings
- F04D29/057—Bearings hydrostatic; hydrodynamic
Abstract
The present invention relates to a compressor and an air conditioning system, the compressor comprising: a compression part for compressing the refrigerant; the rotating shaft (1) is used for driving the compression part to work; the air suspension bearing (3) is sleeved on the rotating shaft (1); the bearing support (2) is provided with a mounting hole for mounting the air suspension bearing (3); and an elastic cushion (4) provided on the outer peripheral surface of the air bearing (3). By applying the technical scheme of the invention, the elastic cushion layer can provide extra high damping for the air suspension bearing, so that the problems of damping reduction of the air suspension bearing and instability of the air suspension bearing caused by overhigh rotating speed and enhanced dynamic pressure effect of the rotating shaft can be prevented, the extra high damping provided by the elastic cushion layer can well absorb the vibration of the rotating shaft at high rotating speed, and the stability and the reliability of the operation of the compressor are improved.
Description
Technical Field
The invention relates to the field of refrigeration equipment, in particular to a compressor and an air conditioning system.
Background
Fig. 1 shows a schematic view of a related art compressor. As shown in fig. 1, the compressor includes a rotating shaft 1 and first and second compression parts 2 and 3 respectively provided at both ends of the rotating shaft 1. The discharge port of the first compression part 2 communicates with the suction port of the second compression part 3, and the second compression part 3 is used to re-compress the refrigerant compressed by the first compression part 2. The first compression part 2 includes a first centrifugal impeller 2a and a first diffuser 2b for compressing the refrigerant accelerated by the first centrifugal impeller 2a therein. A first centrifugal impeller 2a is connected to a first end of the shaft 1. The second compression part 3 includes a second centrifugal impeller 3a and a second diffuser 3b for compressing the refrigerant accelerated by the second centrifugal impeller 3a therein. A second centrifugal impeller 3a is connected to a second end of the shaft 1. The compressor further comprises a bearing 4 for carrying the rotating shaft 1, the bearing being a static pressure gas bearing.
The static pressure gas bearing is a bearing with no friction, small loss and high stability, wherein after gas passes through small holes (micropores and porous holes) on the surface of the bearing, a stable pressure gas film is formed between the rotating shaft 1 and the inner surface of the bearing 4, so that the rotating shaft 1 floats.
The throttling technologies adopted by the conventional static pressure gas bearing include single-pore throttling type, multi-pore throttling type, micro-groove throttling type, micropore throttling type and porous material throttling type, wherein the porous static pressure gas bearing utilizes a novel porous material as a bearing surface to obtain a lubricating gas film with good consistency. A large number of tiny air supply holes are distributed in the porous material, and an external air source enters the surface of the bearing through the porous material to form a pressure air film for supporting load.
The working principle of the porous gas bearing is complex, when external driving force is not provided for the rotor and only external gas source is provided, gas supplied by the bearing enters small holes (micropores and porous holes) of the static pressure gas bearing through the gas inlet holes, and finally a pressure gas film is formed at the gap between the rotor and the bearing to support external load, and under the working condition, the bearing is equivalent to a pure static pressure gas bearing; when external air pressure is not provided and only external driving force is provided for the rotor, lubricating gas is brought into the wedge-shaped gap due to the hydrodynamic effect and forms a lubricating gas film to bear external load, and at the moment, the bearing is equivalent to a pure hydrodynamic gas bearing; when an external air source and an external force for driving the rotor to rotate are provided at the same time, if the rotating speed is high, the dynamic pressure effect generated by the rotation of the rotor cannot be ignored at the moment.
The direct stiffness coefficients Kxx and Kyy of the porous static pressure gas bearing are increased along with the increase of the rotating speed, and the direct damping coefficients Cxx and Cyy are decreased along with the increase of the rotating speed, because the influence of the dynamic pressure effect on the dynamic characteristics of the bearing is far greater than the static pressure effect when the rotating speed is higher, the wedge effect and the dynamic pressure effect of the air film are stronger when the rotating speed is higher, the bearing capacity of the bearing is larger, and in this case, it is more difficult to change the thickness distribution of the formed air film, so that the bearing shows larger stiffness.
At present, several methods for reducing the vibration of the static pressure gas bearing are adopted, such as a tangential air inlet mode, a pre-eccentric arrangement, a floating ring bearing and an elastic support bearing, wherein the former methods have certain difficulty in operating the porous static pressure gas bearing.
Disclosure of Invention
The invention aims to provide a compressor and an air conditioning system to solve the problem that a rotating shaft is unstable in operation due to large vibration of a static pressure gas bearing in the prior art.
According to an aspect of an embodiment of the present invention, there is provided a compressor including:
a compression part for compressing the refrigerant;
the rotating shaft is used for driving the compression part to work;
the air suspension bearing is sleeved on the rotating shaft;
the bearing support is provided with a mounting hole for mounting the air suspension bearing; and
and the elastic cushion layer is arranged on the peripheral surface of the air suspension bearing.
Optionally, the resilient cushion extends in a circumferential direction of the air bearing.
Optionally, the surface of the elastic cushion layer facing the bearing support is provided with a recess.
Optionally, the recess extends in a circumferential direction of the air bearing.
Optionally, a section of the elastic cushion layer parallel to the axial direction of the air bearing is wavy.
Optionally, the compressor further comprises a positioning part for limiting the movement of the elastic cushion layer relative to the air bearing along the axial direction of the air bearing.
Optionally, the positioning portion includes a positioning groove and a protrusion portion adapted to the positioning groove, one of the positioning groove and the protrusion portion is disposed on the air bearing, and the other is disposed on the elastic cushion layer.
Optionally, the bearing support is provided with a duct for conveying gas to the gas-bearing suspension.
Optionally, the compression part comprises an impeller mounted on the rotating shaft and a diffuser disposed at an end of the impeller remote from the rotating shaft.
According to another aspect of the present application, there is also provided an air conditioning system including the compressor described above.
By applying the technical scheme of the invention, the elastic cushion layer can provide extra high damping for the air suspension bearing, so that the problems of damping reduction of the air suspension bearing and instability of the air suspension bearing caused by overhigh rotating speed and enhanced dynamic pressure effect of the rotating shaft can be prevented, the extra high damping provided by the elastic cushion layer can well absorb the vibration of the rotating shaft at high rotating speed, and the stability and the reliability of the operation of the compressor are improved.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
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, and 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 these drawings without creative efforts.
Fig. 1 is a schematic view showing a structure of a related art compressor;
fig. 2 shows a schematic configuration of a compressor of an embodiment of the present invention;
fig. 3 is a schematic structural view illustrating an air bearing and an elastic cushion of a compressor according to an embodiment of the present invention;
FIG. 4 illustrates a schematic structural view of an air bearing of a compressor in accordance with an embodiment of the present invention;
fig. 5 is a schematic structural view illustrating an elastic cushion of a compressor according to an embodiment of the present invention;
FIG. 6 is a schematic view showing the construction of an air bearing and an elastic cushion of a compressor in accordance with another alternative embodiment of the present invention; and
fig. 7 is a view illustrating the structure of an elastic cushion of a compressor according to another alternative embodiment of the present invention.
In the figure:
1. a rotating shaft; 2. a bearing support; 3. an air bearing; 31. positioning a groove; 4. an elastic cushion layer; 41. a recessed portion; 42. a projection; 43. a wave-shaped structure; 5. a tunnel.
Detailed Description
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. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. 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.
Fig. 2 shows a schematic structural diagram of a compressor according to an embodiment of the present invention, and referring to fig. 2, the compressor according to the embodiment includes a compression portion for compressing a refrigerant, a rotating shaft 1 for driving the compression portion to operate, an air suspension bearing 3 sleeved on the rotating shaft 1, a bearing support 2 provided with a mounting hole for mounting the air suspension bearing 3, and an elastic cushion 4 disposed on an outer circumferential surface of the air suspension bearing 3. The elastic cushion 4 may be made of rubber.
In this embodiment, the elastic cushion layer 4 can provide extra high damping for the air suspension bearing 3, which is beneficial to preventing the problems of damping reduction of the air suspension bearing 3 and instability of the air suspension bearing 3 caused by overhigh rotating speed and dynamic pressure effect enhancement of the rotating shaft 1, and the extra high damping provided by the elastic cushion layer 4 can well absorb the vibration of the rotating shaft 1 at high rotating speed, and improve the stability and reliability of the operation of the compressor.
Furthermore, the elastic cushion layer 4 can also improve the overall sealing performance of the compressor, and prevent the refrigerant or the gas provided for the gas suspension bearing 3 from leaking and the pressure difference from reaching the requirement of bearing conduction.
The compression part comprises an impeller arranged on the rotating shaft 1 and a diffuser arranged at one end of the impeller, which is far away from the rotating shaft 1. The impeller is used for accelerating the refrigerant sucked by the compression part, and the refrigerant is accelerated by the impeller and then compressed in the diffuser.
The elastic cushion 4 extends in the circumferential direction of the air bearing 3. The elastic cushion layer 4 is sleeved on the whole peripheral surface of the air suspension bearing 3 to provide higher damping for the air suspension bearing 3 and reduce the vibration generated when the rotating shaft 1 rotates at high speed, thereby improving the stability and reliability of the operation of the compressor.
Fig. 3 shows a schematic structural view of the air bearing 3 and the elastic cushion 4 of the present embodiment; fig. 4 shows a schematic structural view of the air bearing 3 of the present embodiment; fig. 5 shows a schematic structural view of the elastic cushion 4 of the present embodiment.
As shown in fig. 2 to 5, the surface of the elastic cushion layer 4 facing the bearing holder 2 is provided with a recessed portion 41 to reduce the area of the fitting surface between the elastic cushion layer 4 and the bearing holder 2, so as to reduce friction during the process of installing the air bearing 3 and the elastic cushion layer 4 into the mounting hole of the bearing holder 2, which is beneficial to reducing the difficulty of assembling the air bearing 3 and the elastic cushion layer 4.
In the present embodiment, the recess 41 is annular extending in the circumferential direction of the air bearing 3.
As shown in fig. 3 to 5, the compressor further includes a positioning portion for limiting the movement of the elastic cushion 4 relative to the air bearing 3 in the axial direction of the air bearing 3.
The location portion is including setting up constant head tank 31 on the outer peripheral face of air suspension bearing 3 and the bulge 42 of setting on the inner peripheral face of elastic cushion layer 4, and bulge 42 and constant head tank 31 looks adaptation are established with the cover of elastic cushion layer 4 on the outer peripheral face of air suspension bearing 3, and bulge 42 inlays and establishes in constant head tank 31 to restriction air suspension bearing 3 and elastic cushion layer 4 are along axial relative movement.
Alternatively, the positioning groove 31 extends in the circumferential direction of the air bearing 3, and the projection 42 extends in the circumferential direction of the elastic cushion 4.
In other alternative embodiments, the inner surface of the elastic cushion 4 is provided with a positioning groove, and the outer circumferential surface of the air bearing 3 is provided with a protrusion matched with the positioning groove.
In this embodiment, the air bearing 3 is a static pressure type air bearing. The bearing support 2 is provided with a duct 5 for conveying gas to the gas suspension bearing 3.
The gas bearing 3 includes a porous material for permeating gas in the pore passage 5 into a gap between the gas bearing 3 and the rotating shaft 1 to form a gas film between the gas bearing 3 and the rotating shaft 2.
As shown in fig. 2 to 5, the compressor of the present embodiment includes a porous static pressure type aero-levitation bearing 3 and an elastic pad 4 attached to an outer circumferential surface of the aero-levitation bearing 3.
The elastic cushion 4 made of rubber is mounted in the positioning groove 31 of the porous static pressure type air suspension bearing 3 through the protruding part 42, and the structure can position the elastic cushion 4 on the air suspension bearing 3 relatively simply.
The peripheral surface of elastic cushion 4 still is provided with depressed part 41 to reduce the fitting surface of elastic cushion 4 and bearing support 2, reduce the friction of the in-process of packing into the mounting hole with gas suspension bearing 3 and elastic cushion 4, thereby reduce the assembly degree of difficulty. The elastic cushion layer 4 is a whole block of rubber block, so the damping is large and can provide extra large damping for the air suspension bearing 3, the damping can be well provided for the bearing under the condition that the damping of the bearing is reduced when the rotating speed is high, the energy of the vibration of the rotating shaft 1 is absorbed, and the operation stability of the compressor is improved.
Fig. 6 shows a schematic structural view of an air bearing 3 and an elastic cushion 4 of a compressor according to another alternative embodiment; fig. 7 shows a schematic structural view of the elastic cushion 4 of this embodiment.
As shown in fig. 6 and 7, the elastic pad 4 of this embodiment has a wave-shaped cross section parallel to the axial direction of the air bearing 3. The inner peripheral surface of the elastic cushion 4 is provided with a convex part 42, and the outer peripheral surface of the air suspension bearing 3 is provided with a positioning groove matched with the convex part 42. The protrusion 42 is embedded in the positioning groove to limit the movement of the elastic cushion 4 relative to the air bearing 3 in the axial direction of the air bearing 3.
The wavy structure 43 may act as a cushion for the first stage. When the damping of the air bearing 3 is reduced, the wavy structure 43 is compressed first, the wavy structure 43 provides a certain damping for the air bearing 3, and when the damping of the wavy structure 43 cannot eliminate the vibration of the rotating shaft 1, the main body part of the elastic cushion layer 4 can still provide a certain damping for the bearing, so that the vibration of the bearing is counteracted. The bearing structure provides double damping effects, can obviously eliminate the vibration of the rotating shaft 1, and improves the running stability of the compressor.
As shown in fig. 2, the two ends of the rotating shaft 1 of the compressor of this embodiment are both provided with the air bearing 3, the two ends of the rotating shaft 1 are also both provided with the bearing supports 2, and the two air bearings 3 are respectively installed in the bearing installation holes of the two bearing supports 2. The inner diameter of the bearing mounting hole is smaller than the outer diameter of the elastic cushion layer 4. The bearing support 2 is provided with a duct 5 for feeding gas to the gas suspension bearing 3.
The present invention is not limited to the above exemplary embodiments, and any modifications, equivalent replacements, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A compressor, comprising:
a compression part for compressing the refrigerant;
the rotating shaft (1) is used for driving the compression part to work;
the air suspension bearing (3) is sleeved on the rotating shaft (1);
the bearing support (2) is provided with a mounting hole for mounting the air suspension bearing (3); and
and the elastic cushion layer (4) is arranged on the outer peripheral surface of the air suspension bearing (3).
2. Compressor according to claim 1, characterized in that the elastic cushion (4) extends in the circumferential direction of the gas suspension bearing (3).
3. Compressor according to claim 1, characterized in that the surface of the elastic cushion (4) facing the bearing support (2) is provided with a recess (41).
4. A compressor according to claim 3, characterized in that the recess (41) extends in the circumferential direction of the aerostatic bearing (3).
5. Compressor according to claim 1, characterized in that the section of the elastic cushion (4) parallel to the axial direction of the gas suspension bearing (3) is undulated.
6. The compressor according to claim 1, further comprising a positioning portion for limiting the movement of the elastic cushion (4) relative to the air bearing (3) in the axial direction of the air bearing (3).
7. The compressor according to claim 6, wherein the positioning portion includes a positioning groove (31) and a protrusion (42) fitted to the positioning groove (31), one of the positioning groove (31) and the protrusion (42) being provided on the aero-levitation bearing (3) and the other being provided on the elastic cushion (4).
8. Compressor according to claim 1, characterized in that the bearing support (2) is provided with a duct (5) for conveying gas to the gas suspension bearing (3).
9. The compressor according to claim 1, wherein the compression portion includes an impeller mounted on the rotating shaft (1) and a diffuser provided at an end of the impeller remote from the rotating shaft (1).
10. An air conditioning system characterized by comprising the compressor of any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010022394.6A CN113107907A (en) | 2020-01-09 | 2020-01-09 | Compressor and air conditioning system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010022394.6A CN113107907A (en) | 2020-01-09 | 2020-01-09 | Compressor and air conditioning system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113107907A true CN113107907A (en) | 2021-07-13 |
Family
ID=76708573
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010022394.6A Pending CN113107907A (en) | 2020-01-09 | 2020-01-09 | Compressor and air conditioning system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113107907A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114198921A (en) * | 2021-11-22 | 2022-03-18 | 青岛海尔空调电子有限公司 | Method and device for controlling refrigerant circulation system and refrigerant circulation system |
| CN114198828A (en) * | 2021-11-22 | 2022-03-18 | 青岛海尔空调电子有限公司 | Air suspension unit system and control method |
-
2020
- 2020-01-09 CN CN202010022394.6A patent/CN113107907A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114198921A (en) * | 2021-11-22 | 2022-03-18 | 青岛海尔空调电子有限公司 | Method and device for controlling refrigerant circulation system and refrigerant circulation system |
| CN114198828A (en) * | 2021-11-22 | 2022-03-18 | 青岛海尔空调电子有限公司 | Air suspension unit system and control method |
| CN114198828B (en) * | 2021-11-22 | 2024-03-22 | 青岛海尔空调电子有限公司 | Air suspension unit system and control method |
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