CN115875365A - Engineering machine and dynamic and static pressure mixed thrust air bearing thereof - Google Patents
Engineering machine and dynamic and static pressure mixed thrust air bearing thereof Download PDFInfo
- Publication number
- CN115875365A CN115875365A CN202211581420.4A CN202211581420A CN115875365A CN 115875365 A CN115875365 A CN 115875365A CN 202211581420 A CN202211581420 A CN 202211581420A CN 115875365 A CN115875365 A CN 115875365A
- Authority
- CN
- China
- Prior art keywords
- bearing
- porous
- hybrid
- bearing housing
- porous body
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000003068 static effect Effects 0.000 title abstract description 37
- 238000013016 damping Methods 0.000 claims abstract description 32
- 238000009434 installation Methods 0.000 claims abstract description 21
- 210000002706 plastid Anatomy 0.000 claims abstract description 18
- 230000035699 permeability Effects 0.000 claims description 9
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 5
- 229910002804 graphite Inorganic materials 0.000 claims description 5
- 239000010439 graphite Substances 0.000 claims description 5
- 238000004891 communication Methods 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 2
- 239000002184 metal Substances 0.000 claims description 2
- 238000010276 construction Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 15
- 239000011148 porous material Substances 0.000 abstract description 13
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- 229910000906 Bronze Inorganic materials 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000010974 bronze Substances 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Images
Landscapes
- Magnetic Bearings And Hydrostatic Bearings (AREA)
Abstract
The application discloses engineering machine tool and hybrid thrust air supporting bearing thereof, hybrid thrust air supporting bearing include the elastic damping body, bearing housing and porous plastid, the elastic damping body be located bearing housing's first side and with bearing housing installs together on the bearing frame, bearing housing seted up the installation cavity and with the air supply hole of installation cavity intercommunication, the first side of porous plastid is in bearing housing's second side install in the installation cavity, the second side of porous plastid has porous plastid plane and porous plastid wedge face. The dynamic and static pressure mixed thrust air bearing is made of porous materials, combines static pressure and dynamic pressure, and has the effect of bearing by static pressure at low speed and bearing by dynamic pressure at high speed.
Description
Technical Field
The application relates to the technical field of bearings of engineering elements, in particular to a hybrid thrust air bearing. Also relates to engineering machinery.
Background
The air bearing has the advantages of high rotating speed, high precision, small friction loss and the like, and is widely applied to the fields of high speed, precision, turbine rotating machinery and the like. The air bearing is classified into a dynamic pressure type, a static pressure type and a squeeze film type according to the principle of air film pressure generation.
At present, the traditional air bearing adopts pure dynamic pressure or static pressure, and because of the limitation of a bearing principle, a complete air film is not formed when the dynamic pressure air bearing is at a low speed, and the service life of the bearing is influenced in a solid lubrication stage; when the static pressure air bearing is at a high speed, the dynamic pressure effect is obviously enhanced, and the static pressure effect and the dynamic pressure effect jointly influence the bearing, so that the bearing is unstable; in the prior art, the limited orifice flow static pressure hybrid bearing is adopted, and the bearing capacity, the rigidity and the like are relatively weak when the static pressure effect of the bearing is caused due to the limitation and uneven distribution of the number of small orifices.
Therefore, how to provide a hybrid thrust air bearing capable of solving the above technical problems is a technical problem that needs to be solved urgently by those skilled in the art.
Disclosure of Invention
The application aims to provide a hybrid dynamic and static thrust air bearing which is made of porous materials, combines static pressure and dynamic pressure, and has the effects of static pressure bearing at low speed and dynamic pressure bearing at high speed. Another object of the present application is to provide an engineering machine using the hybrid thrust air bearing.
For realizing above-mentioned purpose, this application provides a hybrid thrust air supporting bearing of sound and static pressure, including the elastic damping body, bearing housing and porous plastid, the elastic damping body is located the first side of bearing housing and with bearing housing installs together on the bearing frame, bearing housing seted up the installation cavity and with the air supply hole of installation cavity intercommunication, the first side of porous plastid is in bearing housing's second side install in the installation cavity, the second side of porous plastid has porous plastid plane and porous plastid wedge face.
In some embodiments, the cross-sectional shape of the porous body wedge faces is a circular arc.
In some embodiments, the porous body is made of porous isostatic graphite.
In some embodiments, the second side of the porous body is provided with at least one restriction layer to achieve a permeability at the plane of the porous body that is greater than the permeability at the wedge-face of the porous body.
In some embodiments, the air supply hole is opened on a peripheral side of the bearing housing, and a direction of communication of the air supply hole with the mounting cavity is perpendicular to a mounting direction of the porous body in the mounting cavity.
In some embodiments, the mounting cavities are uniformly arranged on the circumference of the bearing housing, and the air supply holes correspond to the mounting cavities one to one.
In some embodiments, the mounting cavity is fan-shaped.
In some embodiments, the elastic damping body is made of a wire mesh.
In some embodiments, the elastic damping body is provided with a first mounting hole, the bearing housing is provided with a second mounting hole, and the first mounting hole and the second mounting hole are fixed with a bearing seat through a fastener.
The application also provides engineering machinery, which adopts the hybrid thrust air bearing.
Compared with the prior art, the hybrid dynamic-static thrust air bearing provided by the application comprises an elastic damping body, a bearing shell and a porous body, wherein the elastic damping body is positioned on the first side of the bearing shell, and the porous body is arranged on the second side of the bearing shell; the elastic damping body and the bearing shell are arranged on the bearing seat together; the bearing shell is provided with an installation cavity and an air supply hole, and the air supply hole is communicated with the installation cavity; a first side of the porous body is mounted in the mounting cavity and a second side of the porous body has a porous body plane and a porous body wedge plane.
In the working process of the hybrid thrust air bearing, the elastic damping body has elasticity and vibration absorption effects, so that the elastic damping body provides elasticity and damping for the bearing and can bear high and low temperatures; external high-pressure gas is sent into the mounting cavity through the gas supply hole, and then throttling is carried out through the porous body, so that static pressure bearing can be realized; when the air is brought into the porous plastid wedge-shaped surface by high-speed rotation, dynamic pressure bearing can be realized. The dynamic and static pressure mixed thrust air bearing is made of porous materials, static pressure and dynamic pressure are combined, and the effect of static pressure bearing at low speed and dynamic pressure bearing at high speed is achieved.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, it is obvious that the drawings in the following description are only embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is an exploded view of a hybrid thrust air bearing according to an embodiment of the present disclosure;
FIG. 2 is an assembly position diagram of components of a hybrid thrust air bearing according to an embodiment of the present disclosure;
FIG. 3 is an assembly view of a hybrid thrust air bearing according to an embodiment of the present disclosure;
fig. 4 is an assembled sectional view of a porous body provided in an example of the present application.
Wherein:
1-elastic damping body,
101-a first mounting hole;
2-bearing shell,
201-an installation cavity, 202-an air supply hole and 203-a second installation hole;
3-a porous body,
301-porous body plane, 302-porous body wedge plane.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, 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 application.
In order to enable those skilled in the art to better understand the scheme of the present application, the present application will be described in further detail with reference to the accompanying drawings and the detailed description.
Referring to fig. 1 to 4, in which fig. 1 is an exploded view of a hybrid thrust air bearing according to an embodiment of the present application, fig. 2 is an assembly position view of components of the hybrid thrust air bearing according to the embodiment of the present application, fig. 3 is an assembly view of the hybrid thrust air bearing according to the embodiment of the present application, and fig. 4 is an assembly cross-sectional view of a porous body according to the embodiment of the present application.
In a first specific embodiment, the present application provides a hybrid dynamic and static thrust air bearing, which mainly includes an elastic damping body 1, a bearing housing 2 and a porous body 3, and is made of a porous material, so that static pressure and dynamic pressure are combined, and the hybrid dynamic and static thrust air bearing has the effects of static pressure bearing at low speed and dynamic pressure bearing at high speed.
In this embodiment, the elastic damping body 1 is located on a first side of the bearing housing 2, and the porous body 3 is mounted on a second side of the bearing housing 2. Taking the orientation shown in fig. 1 as an example, the elastic damping body 1 is installed in the bearing housing 2 from the lower side of the bearing housing 2, and the porous body 3 is installed in the bearing housing 2 from the upper side of the bearing housing 2.
On the basis, the elastic damping body 1 and the bearing shell 2 are installed on the bearing seat together, and the elastic damping body 1 has elasticity and vibration absorption effects, so that elasticity and damping are provided for the bearing, and high and low temperatures can be borne.
In the present embodiment, the bearing housing 2 is opened with a mounting cavity 201 and a gas supply hole 202, and the gas supply hole 202 is communicated with the mounting cavity 201, so that external high pressure gas can be supplied into the mounting cavity 201 through the gas supply hole 202.
On this basis, the first side of the porous body 3 is installed in the installation cavity 201, that is, the porous body 3 is installed in the installation cavity 201 of the bearing housing 2 from top to bottom; the porous body 3 is made of a porous material to form a wedge, so that a static pressure effect can be realized, and the processing and the forming are convenient, and the second side of the porous body 3 is provided with a porous body plane 301 and a porous body wedge surface 302, namely the upper side of the porous body 3 is provided with the porous body plane 301 and the porous body wedge surface 302, so that the gas in the installation cavity 201 can reach the upper side of the porous body 3 after passing through the porous body 3 at the lower side of the porous body 3.
During the working process of the hybrid dynamic-static pressure thrust air bearing, external high-pressure gas is sent into the installation cavity 201 through the gas supply hole 202, and then throttling is carried out through the porous body 3, so that gas films can be formed on the porous body plane 301 and the porous body wedge-shaped surface 302, and static pressure bearing is realized; when the rotating speed is high enough, air is brought into the wedge-shaped area where the porous plastid wedge-shaped surface 302 is located, a dynamic pressure effect is formed, and dynamic pressure bearing can be achieved.
To sum up, the present application relates to a novel thrust air bearing, and more specifically, it relates to a thrust air bearing that static pressure and dynamic pressure that porous material made combine together to solve dynamic pressure air bearing and be in contact friction (solid lubrication) when low speed, static pressure air bearing dynamic pressure effect reinforcing when high speed, technical problem such as poor stability.
It should be explained that, in the prior art, the dynamic pressure type air bearing means that two surfaces move relatively and the gap becomes a wedge shape, the gap gradually becomes smaller along the moving direction, and due to the relative movement, the gas is dragged and pressed into the wedge-shaped gap due to the viscosity action of the gas, so as to generate pressure and form dynamic pressure suspension; the static pressure type air bearing is a type in which an external compressed gas is introduced into a gap through a restrictor and suspended by static pressure.
Compared with the prior art, the problem that this application can solve:
the dynamic and static pressure mixed bearing is adopted, so that the problem that the bearing life is influenced due to insufficient bearing capacity when the dynamic pressure bearing is at a low speed is avoided, and the problem that the stability of the bearing is influenced due to the fact that the dynamic pressure effect is enhanced, dynamic and static pressures coexist when the static pressure bearing is at a high speed is solved;
the micropore characteristic of porous materials is adopted to replace small holes, so that the gas film of the bearing is uniformly distributed, and the bearing has better performances such as bearing capacity and rigidity;
the porous material is easy to process (common porous materials comprise graphite, stainless steel, bronze, aluminum, ceramic and the like), and can be directly processed and molded, so that the precision of the working surface of the bearing is ensured.
Further, the porous body wedge surface 302 of the porous body 3 may have a straight line shape or a circular arc shape, and it is within the scope of the present embodiment.
Illustratively, the cross-sectional shape of the porous plastid wedge-face 302 is a circular arc.
Further, the porous body 3 may be made of porous graphite, stainless steel, bronze, aluminum alloy, ceramic, or the like, and shall fall within the scope of the present embodiment.
For example, the porous body 3 is made of porous isostatic graphite.
Further, the porous body plane 301 and the porous body wedge surface 302 of the porous body 3 can be obtained by machining such as turning, grinding, and polishing, and the present embodiment shall fall within the scope of the present description.
Furthermore, the surface of the porous body 3 can be formed with a limiting layer by spraying or plating, and the porous permeability is changed to reduce the gas consumption.
Illustratively, the second side of the porous body 3 is provided with at least one confinement layer to achieve a permeability of the porous body plane 301 that is greater than the permeability of the porous body wedge-face 302.
Particularly, when the rotating speed exceeds a certain value, the dynamic pressure effect can be completely carried, the gas supply to the bearing can be stopped, and the gas consumption is reduced.
In conclusion, the hybrid dynamic and static thrust air bearing also adds a limiting layer on the surface of the porous body 3, so that the permeability of the porous material can be changed, the air consumption can be reduced, and the energy-saving purpose can be realized.
In some embodiments, the air supply hole 202 is opened on the peripheral side of the bearing housing 2, and the direction of communication between the air supply hole 202 and the mounting cavity 201 is perpendicular to the mounting direction of the porous body 3 in the mounting cavity 201.
In the present embodiment, the elastic damping body 1 and the bearing housing 2 are both annular, and the porous body 3 may be formed by combining a plurality of single bodies. The elastic damping body 1, the bearing housing 2, and the porous body 3 are combined in the axial direction, and a gas supply hole 202 having a through direction perpendicular to the axial direction is formed in the circumferential side of the bearing housing 2, thereby allowing high-pressure gas to be introduced into the bearing housing 2 from the outside to the inside.
Further, the gas supply hole 202 is a threaded gas supply hole, so that the gas quick connector is connected with the gas through threads conveniently, and quick disassembly and assembly are realized.
As shown in fig. 1, the bearing housing 2 is provided with 6M 3 threaded gas supply holes for coupling with a gas quick connector.
Further, the mounting cavities 201 are uniformly arranged on the circumference of the bearing housing 2, and the air supply holes 202 correspond to the mounting cavities 201 one to one.
Further, the mounting cavity 201 is shaped like a sector.
As shown in fig. 1, the hybrid thrust air bearing comprises an elastic damping body 1, a bearing shell 2 and porous bodies 3, wherein 6 fan-shaped installation cavities 201 are uniformly distributed in the bearing shell 2, the installation cavities 201 are provided with step surfaces for positioning, and the 6 porous bodies 3 are bonded in the installation cavities 201 through glue.
In some embodiments, the elastic damping body 1 may be obtained by wire mesh stamping, rubber cutting, elastic foil stamping, and the like, and the description of the present embodiment is included herein.
Illustratively, the elastic damping body 1 is made of a metal wire mesh and is formed by punching; the wire mesh can provide elasticity and damping for the bearing and can bear high and low temperature.
In some embodiments, the elastic damping body 1 is provided with a first mounting hole 101, the bearing housing 2 is provided with a second mounting hole 203, and the first mounting hole 101 and the second mounting hole 203 are fixed with the bearing seat by a fastener.
As shown in fig. 1, 6U-shaped second mounting holes 203 are uniformly distributed on the bearing housing 2, 6U-shaped first mounting holes 101 with the same size and position are arranged on the elastic damping body 1 and the bearing housing 2, and the bearing housing 2 is mounted on the bearing seat through screws after being matched with the elastic damping body 1.
The application also provides engineering machinery, which adopts the dynamic and static pressure mixed thrust air bearing; the engineering machinery utilizes the hybrid dynamic and static pressure thrust air bearing to enable external high-pressure gas to enter the installation cavity 201 through the gas supply hole 202, forms an air film through throttling of the porous body 3 and can realize static pressure bearing; when the thrust disc rotates at high speed and brings air into the wedge-shaped area, dynamic pressure bearing can be realized.
On the basis, the engineering machine also has other beneficial effects of the hybrid dynamic-static thrust air bearing: the porous material is adopted, so that the processing is easy, and the surface forming quality is good; throttling is performed by utilizing the microporous characteristic of the porous material, so that the bearing air film is uniformly distributed, and the performances such as bearing capacity, rigidity and the like are better; the energy-saving purpose can be realized by changing the permeability of the porous material.
It should be noted that many of the components mentioned in this application are either common standard components or components known to those skilled in the art, and their structure and principle are known to those skilled in the art through technical manuals or through routine experimentation.
It is noted that, in this specification, relational terms such as first and second, and the like are used solely to distinguish one entity from another entity without necessarily requiring or implying any actual such relationship or order between such entities.
The engineering machinery and the dynamic and static pressure hybrid thrust air bearing thereof provided by the application are described in detail above. The principles and embodiments of the present application are explained herein using specific examples, which are provided only to help understand the method and the core idea of the present application. It should be noted that, for those skilled in the art, it is possible to make several improvements and modifications to the present application without departing from the principle of the present application, and such improvements and modifications also fall within the scope of the claims of the present application.
Claims (10)
1. The utility model provides a hybrid thrust air supporting bearing of hybrid-hybrid, its characterized in that, includes elastic damping body (1), bearing housing (2) and porous plastid (3), elastic damping body (1) is located the first side of bearing housing (2) and with bearing housing (2) together install on the bearing frame, bearing housing (2) seted up installation cavity (201) and with air supply hole (202) of installation cavity (201) intercommunication, the first side of porous plastid (3) is in the second side of bearing housing (2) install in installation cavity (201), the second side of porous plastid (3) has porous plastid plane (301) and porous plastid wedge face (302).
2. The hybrid thrust air bearing according to claim 1, wherein the cross-sectional shape of the porous body wedge surface (302) is a circular arc.
3. The hybrid dynamic-static thrust air bearing according to claim 1, wherein the porous body (3) is made of porous isostatic graphite.
4. Hybrid thrust air-bearing according to claim 1, characterized in that said second side of said porous body (3) is provided with at least one limiting layer to achieve a permeability of the plane of said porous body (301) greater than the permeability of the wedge-shaped faces of said porous body (302).
5. The hybrid thrust air bearing according to claim 1, wherein the air supply hole (202) is opened on a circumferential side of the bearing housing (2), and a direction of communication between the air supply hole (202) and the mounting cavity (201) is perpendicular to a mounting direction of the porous body (3) in the mounting cavity (201).
6. The hybrid thrust air bearing according to claim 1, characterized in that the mounting cavities (201) are uniformly arranged on the circumference of the bearing housing (2), and the air supply holes (202) correspond to the mounting cavities (201) one to one.
7. The hybrid thrust aerostatic bearing of claim 6, wherein the mounting cavity (201) is sector shaped.
8. The hybrid thrust air bearing according to claim 1, characterized in that said elastic damping body (1) is made of a metal wire mesh.
9. The hybrid thrust aerostatic bearing of claim 1, characterized in that the elastic damping body (1) is provided with a first mounting hole (101), the bearing housing (2) is provided with a second mounting hole (203), and the first mounting hole (101) and the second mounting hole (203) are fixed with a bearing seat by fasteners.
10. A construction machine characterized by using the hybrid thrust aerostatic bearing according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211581420.4A CN115875365A (en) | 2022-12-09 | 2022-12-09 | Engineering machine and dynamic and static pressure mixed thrust air bearing thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211581420.4A CN115875365A (en) | 2022-12-09 | 2022-12-09 | Engineering machine and dynamic and static pressure mixed thrust air bearing thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115875365A true CN115875365A (en) | 2023-03-31 |
Family
ID=85766849
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211581420.4A Pending CN115875365A (en) | 2022-12-09 | 2022-12-09 | Engineering machine and dynamic and static pressure mixed thrust air bearing thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115875365A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118224185A (en) * | 2024-05-23 | 2024-06-21 | 广东优社动力科技有限公司 | Dynamic and static pressure mixed gas bearing |
-
2022
- 2022-12-09 CN CN202211581420.4A patent/CN115875365A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118224185A (en) * | 2024-05-23 | 2024-06-21 | 广东优社动力科技有限公司 | Dynamic and static pressure mixed gas bearing |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA1271978A (en) | Double-conical static pressure-type gas bearing | |
| CN109236644B (en) | Star wheel assembly and single-screw air compressor comprising same | |
| CN202023843U (en) | Gas bearing | |
| CN115875365A (en) | Engineering machine and dynamic and static pressure mixed thrust air bearing thereof | |
| CN108825656A (en) | A kind of vacuum adsorption porous gas static pressure thrust bearing | |
| CN114992244B (en) | A Porous Tilting Pad Hydrostatic Gas Thrust Bearing with Damper | |
| JP3860253B2 (en) | Static pressure gas bearing | |
| JPS61290232A (en) | Gas static pressure bearing | |
| CN214424901U (en) | Thrust bearing and air conditioning unit | |
| CN101275605A (en) | Film thickness adjustable static pressure bearing and regulating method thereof | |
| CN113217541A (en) | Porous ring belt exhaust type static pressure air-float thrust bearing | |
| CN207879856U (en) | A kind of non-uniform Distribution variable orifice diameter is radial gas bearing provided | |
| CN108061096A (en) | A kind of porous gas static pressure revolving platform | |
| CN207709894U (en) | A kind of composite throttling formula static pressure air-bearing electro spindle | |
| CN108941623B (en) | Composite throttling type static pressure air floatation electric spindle | |
| CN103453017A (en) | Dynamic and static pressure air floating bearing with zooming structure molded line | |
| CN104389904A (en) | Gas static pressure bearing with floating thrust surface | |
| CN214304498U (en) | Compressor and air conditioner | |
| CN109571063A (en) | A kind of built-in central water outlet cylinder tool changing electrical spindle | |
| CN210371669U (en) | Magnetic-gas mixed hybrid bearing | |
| CN113107907A (en) | Compressor and air conditioning system | |
| CN209892446U (en) | Water lubrication screw compressor | |
| CN212297274U (en) | Gas bearing, compressor and air conditioning unit | |
| CN212297251U (en) | Tilting pad dynamic pressure bearing | |
| CN214534064U (en) | Small hole and slit composite throttling gas static pressure thrust bearing |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |