Gas suspension rotating structure and gas suspension centrifugal compressor
By setting a bearing support precision adjustment part on the bearing support and cooperating with the motor rotor, the problem of difficult control of bearing support precision is solved, higher motor rotor suspension precision and running stability are achieved, and production efficiency is improved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GREE ELECTRIC APPLIANCE INC OF ZHUHAI
- Filing Date
- 2025-06-10
- Publication Date
- 2026-06-19
AI Technical Summary
In the existing technology, the bearing support in the gas bearing assembly is difficult to achieve the required high precision through direct precision machining, which affects the suspension accuracy of the motor rotor and its stability under high-speed operation.
A bearing support precision adjustment part is set on the bearing support. By cooperating with the outer peripheral surface of the motor rotor, the positional accuracy of the bearing support is calibrated. Combined with the precision machining of the bearing positioning part and the radial bearing component, the positional accuracy is ensured to be within 1 to 2 μm.
It improves the positional accuracy and ease of adjustment of the bearing support, enhances the suspension accuracy and operational stability of the motor rotor, reduces production costs, and increases production efficiency.
Smart Images
Figure CN224385215U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of compressor technology, and more specifically, it relates to an air-suspension rotating structure and an air-suspension centrifugal compressor. Background Technology
[0002] The air-suspension centrifugal compressor is a high-performance compressor that uses gas bearing technology. The gas bearing mainly relies on gas to support and lubricate the motor rotor. It has a series of advantages such as oil-free operation, high efficiency, high speed, compact structure, and high versatility. It is a new generation of high-precision bearing technology and is widely used in petrochemical, natural gas compression, air conditioning and refrigeration systems and other fields.
[0003] Because the lubricating medium is gas, the frictional resistance is low, and the operating speed of an air-suspended centrifugal compressor is much higher than that of a compressor using oil lubrication technology. To ensure the stability of the compressor under high-speed operation, the suspension state of the motor rotor cannot be ignored, and the positional accuracy and stability of the gas bearing assembly that supports the motor rotor are also very important.
[0004] In existing technologies, the bearing supports in gas bearing assemblies are typically difficult to machine to the required precision using direct finishing. For example... Figure 1 As shown, after the bearing support 4 is precision machined, it needs to be assembled onto the cylinder 2 first, and then machined on a machine tool for boring to ensure that the dimensional accuracy and positional accuracy meet the requirements. Due to the limitations of machine tool accuracy, boring usually requires multiple machine runs to achieve the required accuracy range, i.e., within 5μm (this accuracy range requirement depends on the thickness of the air film during the operation of the air suspension bearing).
[0005] In existing gas bearing assemblies, the high precision requirements of the bearing supports are difficult to control precisely due to limitations in current machine tool conditions. This results in the bearing supports in gas bearing assemblies failing to meet expected positional accuracy standards, which in turn affects the levitation accuracy of the motor rotor and its stability during high-speed operation. Utility Model Content
[0006] The purpose of this invention is to provide an air-suspension rotating structure and an air-suspension centrifugal compressor, which aims to improve the positional accuracy of the bearing support in the gas bearing assembly.
[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows:
[0008] This utility model provides an air-suspended rotating structure, including a motor rotor and a gas bearing assembly installed in a cylinder to support the motor rotor. The gas bearing assembly includes a radial bearing component sleeved on the motor rotor and a bearing support sleeved on the radial bearing component. The bearing support is provided with a support accuracy adjustment part, which is used to cooperate with the outer peripheral surface of the motor rotor when the motor rotor extends into the bearing support to calibrate the position accuracy of the bearing support.
[0009] Furthermore, the bearing support is provided with a bearing positioning part for positioning the radial bearing component.
[0010] Furthermore, the support precision adjustment part is an L-shaped protrusion provided at the end of the bearing support.
[0011] Furthermore, the outer circumferential surface of the motor rotor is provided with a relief groove corresponding to the L-shaped protrusion.
[0012] Furthermore, an auxiliary end face is provided on the outer peripheral surface of the motor rotor. When the auxiliary end face is flush with the outer end face of the radial bearing component, the clearance groove is aligned with the vertical section of the L-shaped protrusion.
[0013] Furthermore, the bearing positioning part is a positioning protrusion provided at the connection between the L-shaped protrusion and the bearing support, and the positioning protrusion abuts against the inner end face of the radial bearing component.
[0014] Furthermore, the radial bearing component includes a radial bearing and a bearing bushing fitted onto the radial bearing.
[0015] Furthermore, the number of gas bearing assemblies is set to two, and the two gas bearing assemblies are spaced apart and sleeved on the outer peripheral surface of the motor rotor.
[0016] Furthermore, the bearing support is provided with a snap-fit part for snapping into the stepped surface inside the cylinder.
[0017] This utility model also provides an air-suspension centrifugal compressor, including the air-suspension rotating structure as described above.
[0018] Compared with existing technologies, the beneficial effects of the air-suspension rotating structure and air-suspension centrifugal compressor provided by this utility model are as follows: In the air-suspension rotating structure proposed by this utility model, the bearing support is provided with a support precision adjustment part. This part can cooperate with the outer circumferential surface of the motor rotor during the process of the motor rotor extending into the bearing support, thereby calibrating the positional accuracy of the bearing support. After calibration, the installation of the radial bearing components can be directly started without repeated disassembly and assembly of the bearing support and multiple machine operations. Through this novel air-suspension rotating structure, the positional accuracy of the bearing support is effectively improved, and the positional accuracy adjustment process becomes more convenient. This makes the suspension accuracy of the motor rotor easier to control, thereby achieving a higher level of precision and ultimately enhancing the operational stability and safety of the motor rotor in a suspended state. Attached Figure Description
[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0020] Figure 1 This is a cross-sectional view of an existing air-suspension centrifugal compressor.
[0021] Figure 2 This is a cross-sectional view of the air-suspension centrifugal compressor in a preferred embodiment of the present invention. Figure 1 ;
[0022] Figure 3 for Figure 2 Enlarged view of point A in the middle;
[0023] Figure 4 This is a cross-sectional view of the air-suspension centrifugal compressor in a preferred embodiment of the present invention. Figure 2 ;
[0024] Figure 5 for Figure 4 Enlarged view of point B in the middle;
[0025] Figure 6 This is a perspective view of the radial bearing component in a preferred embodiment of the present invention;
[0026] Figure 7 This is a cross-sectional view of the radial bearing component in a preferred embodiment of the present invention;
[0027] The main markings in the attached figures are as follows:
[0028] 1. Motor rotor; 2. Cylinder body; 3. Radial bearing assembly; 4. Bearing support; 5. Support precision adjustment part; 6. Bearing positioning part; 7. Clearance groove; 8. Auxiliary end face; 9. Motor stator;
[0029] 21. Stepped surface; 31. Radial bearing; 32. Bearing bushing; 41. Snap-fit part;
[0030] 401, Primary bearing support; 301, Primary bearing bushing; 302, Primary radial bearing; 411, Secondary bearing support; 311, Secondary bearing bushing; 312, Secondary radial bearing. Detailed Implementation
[0031] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.
[0032] The air-suspension centrifugal compressor is a high-performance compressor that uses gas bearing technology. The gas bearing mainly relies on gas to support and lubricate the motor rotor. It has a series of advantages such as oil-free operation, high efficiency, high speed, compact structure, and high versatility. It is a new generation of high-precision bearing technology and is widely used in petrochemical, natural gas compression, air conditioning and refrigeration systems and other fields.
[0033] Because the lubricating medium is gas, the frictional resistance is low, and the operating speed of an air-suspended centrifugal compressor is much higher than that of a compressor using oil lubrication technology. To ensure the stability of the compressor under high-speed operation, the suspension state of the motor rotor cannot be ignored, and the positional accuracy and stability of the gas bearing assembly that supports the motor rotor are also very important.
[0034] In existing technologies, the bearing support 4 in a gas bearing assembly is typically difficult to achieve the required precision through direct finishing. For example... Figure 1 As shown, after the bearing support 4 is precision machined, it needs to be assembled onto the cylinder 2 first, and then machined on a machine tool for boring to ensure that the dimensional accuracy and positional accuracy meet the requirements. Due to the limitations of machine tool accuracy, boring usually requires multiple machine runs to achieve the required accuracy range, i.e., within 5μm (this accuracy range requirement depends on the thickness of the air film during the operation of the air suspension bearing).
[0035] In existing gas bearing assemblies, the high precision requirements of the bearing supports are difficult to control precisely due to limitations in current machine tool conditions. This results in the bearing supports in gas bearing assemblies failing to meet expected positional accuracy standards, which in turn affects the levitation accuracy of the motor rotor and its stability during high-speed operation.
[0036] To meet the high precision requirements of air-suspension centrifugal compression and to address the aforementioned problems, it is necessary to design a novel air-suspension rotation structure to improve the accuracy control of bearing support positions and increase efficiency in the production and assembly process.
[0037] Please refer to the following: Figures 2 to 5 The preferred embodiment of this utility model proposes an air suspension rotation structure, which mainly includes a motor rotor 1 and a gas bearing assembly installed in a cylinder 2 to support the motor rotor 1. The gas bearing assembly includes a radial bearing component 3 sleeved on the motor rotor 1 and a bearing support 4 sleeved on the radial bearing component 3. The bearing support 4 is provided with a support accuracy adjustment part 5, which is used to cooperate with the outer peripheral surface of the motor rotor 1 during the process of the motor rotor 1 extending into the bearing support 4, so as to calibrate the position accuracy of the bearing support 4.
[0038] like Figure 1 , Figure 3 As shown, compared to the prior art where the radial bearing 31 needs to be installed inside the bearing support 4, and the bearing support 4 needs to be assembled onto the cylinder 2 before installing the radial bearing 31, and multiple boring operations are required to ensure that the bearing accuracy is controlled within 5μm, this process makes it difficult to accurately control the accuracy of the bearing support 4. In the air suspension rotation structure proposed in this utility model, the bearing support 4 is provided with a support accuracy adjustment part 5. This support accuracy adjustment part 5 can cooperate with the outer peripheral surface of the motor rotor 1 during the process of the motor rotor 1 extending into the bearing support 4, thereby calibrating the position accuracy (including position and concentricity) of the bearing support 4. After calibration, the installation of the radial bearing component 3 can be started directly without repeatedly disassembling and assembling the bearing support 4 and performing multiple on-machine operations. Through this new air suspension rotation structure, the position accuracy of the bearing support 4 is effectively improved, and the position accuracy adjustment process becomes more convenient. This makes the suspension accuracy of the motor rotor 1 easier to control, thereby obtaining a higher level of accuracy, and ultimately enhancing the operational stability and safety of the motor rotor 1 in the suspension state.
[0039] In a preferred embodiment of this utility model, the bearing support 4 is provided with a bearing positioning part 6 for positioning the radial bearing component 3.
[0040] This invention ensures the positional accuracy of the bearing support 4 by having its precision adjustment part 5 on the bearing support 4 mate with the outer circumferential surface of the motor rotor 1, after which the radial bearing component 3 can be installed. At this point, the radial bearing component 3 is positioned by the bearing positioning part 6 on the bearing support 4. The precision of the radial bearing component 3 is strictly controlled by precision machining (precision range of 1-2 μm). Therefore, the positional accuracy of both the bearing support 4 and the radial bearing component 3 in the air-suspended rotation structure is effectively guaranteed, and the suspension accuracy of the motor rotor 1 can be stably controlled within 5 μm. Compared with the prior art, this invention significantly improves production efficiency.
[0041] In a preferred embodiment of this invention, the support precision adjustment part 5 is an L-shaped protrusion disposed at the end of the bearing support 4. Of course, in other alternative embodiments, the support precision adjustment part 5 can also be a protrusion with other structural shapes.
[0042] The bearing precision adjustment part 5 of this utility model adopts an L-shaped protrusion design, which cleverly combines precision adjustment with structural stability. During the process of the motor rotor 1 extending into the bearing support 4, the vertical section of the L-shaped protrusion can continuously contact the outer peripheral surface of the motor rotor 1, thereby adjusting the positional precision of the bearing support 4.
[0043] In a preferred embodiment of this utility model, the outer peripheral surface of the motor rotor 1 is provided with a relief groove 7 corresponding to the L-shaped protrusion.
[0044] After the radial bearing component 3 is installed, the motor rotor 1 needs to be gently pushed to align the clearance groove 7 on the rotor with the vertical section of the L-shaped protrusion. This avoids interference between the motor rotor 1 and the bearing support 4 during operation, and further ensures the suspension accuracy, stability and safety of the motor rotor 1 at high speed.
[0045] In a preferred embodiment of this utility model, an auxiliary end face 8 is provided on the outer peripheral surface of the motor rotor 1. When the auxiliary end face 8 is flush with the outer end face of the radial bearing component 3, the clearance groove 7 is aligned with the vertical section of the L-shaped protrusion.
[0046] In this invention, when the clearance groove 7 of the motor rotor 1 mates with the L-shaped protrusion of the bearing support 4, the alignment can be determined by observing whether the auxiliary end face 8 on the motor rotor 1 is aligned with the outer end face of the radial bearing component 3. When they are aligned, it indicates that the clearance groove 7 of the motor rotor 1 has moved to the position corresponding to the L-shaped protrusion of the bearing support 4, thereby ensuring that the vertical section of the clearance groove 7 and the L-shaped protrusion are precisely aligned. This method of judgment is simple and intuitive, greatly improving the convenience and accuracy of installing the motor rotor 1.
[0047] In a preferred embodiment of this utility model, the bearing positioning part 6 is a positioning protrusion provided at the connection between the L-shaped protrusion and the bearing support 4, and the positioning protrusion abuts against the inner end face of the radial bearing component 3.
[0048] The bearing positioning part 6 of this invention adopts a positioning protrusion design. This design not only enhances the connection stability between the L-shaped protrusion and the bearing support 4, but also ensures the precise positioning of the radial bearing component 3 during installation. When the radial bearing component 3 moves until its inner end face is in close contact with the positioning protrusion, the radial bearing component 3 can be accurately positioned on the bearing support 4. This invention effectively guarantees the positional accuracy between the bearing support 4, the radial bearing component 3, and the motor rotor 1, thereby improving the levitation accuracy of the motor rotor 1.
[0049] In the preferred embodiment of this utility model, such as Figure 6 , Figure 7 As shown, the radial bearing component 3 includes a radial bearing 31 and a bearing bushing 32 sleeved on the radial bearing 31.
[0050] This invention employs a radial bearing component 3, composed of a radial bearing 31 and a bearing bushing 32. The bearing bushing 32 serves as a buffer layer between the radial bearing 31 and the bearing support 4, effectively preventing wear caused by direct contact between the two and thus extending the overall service life. The assembly of the radial bearing component 3 can be performed simultaneously with the insertion of the motor rotor 1 into the bearing support 4, which effectively improves production and assembly efficiency. Furthermore, the radial bearing component 3 undergoes precision machining, with its accuracy strictly controlled within the range of 1–2 μm. By ensuring the positional accuracy of the radial bearing component 3, the levitation accuracy of the motor rotor 1 is further improved.
[0051] In a preferred embodiment of this invention, two gas bearing assemblies are provided, and the two gas bearing assemblies are spaced apart and sleeved on the outer circumferential surface of the motor rotor 1. Specifically, the two gas bearing assemblies are a first gas bearing assembly and a second gas bearing assembly, which are symmetrically arranged on the motor rotor 1. The first gas bearing assembly consists of a primary bearing support 401, a primary bearing bushing 301, and a primary radial bearing 302. The second gas bearing assembly consists of a secondary bearing support 411, a secondary bearing bushing 311, and a secondary radial bearing 312. The primary bearing support 401 and the secondary bearing support 411 are respectively provided with a support precision adjustment part 5 and a bearing positioning part 6.
[0052] This invention provides stable support to the motor rotor 1 by installing two gas bearing assemblies at each end. This design ensures that the motor rotor 1 maintains balance during high-speed rotation, thereby effectively improving the smoothness of the motor rotor 1's operation while ensuring its suspension accuracy.
[0053] In a preferred embodiment of this utility model, the bearing support 4 is provided with a snap-fit part 41 for snapping with the stepped surface 21 inside the cylinder 2.
[0054] This utility model effectively enhances the installation stability of the bearing support 4 in the cylinder 2 by tightly engaging the snap-fit part 41 on the bearing support 4 with the stepped surface 21 inside the cylinder 2, and effectively avoids the shaking problem of the bearing support 4.
[0055] A preferred embodiment of this utility model provides an air-suspended centrifugal compressor, which includes the air-suspended rotating structure as described above. Because the air-suspended rotating structure ensures the positional accuracy of the bearing support 4 and simplifies the adjustment process, it makes it easier to control the suspension accuracy of the motor rotor 1, thereby significantly improving the operational stability and safety of the motor rotor 1 in the suspended state.
[0056] To understand this more clearly, the following will combine... Figures 1 to 7 The air-suspension centrifugal compressor proposed in the preferred embodiment of this utility model will be described in detail.
[0057] The air-suspension centrifugal compressor mainly includes the following components: cylinder 2, motor stator 9, motor rotor 1, first gas bearing assembly, and second gas bearing assembly.
[0058] The first gas bearing assembly consists of a primary bearing support 401, a primary bearing bushing 301, and a primary radial bearing 302. The second gas bearing assembly consists of a secondary bearing support 411, a secondary bearing bushing 311, and a secondary radial bearing 312. Typically, the primary bearing support 401 is mounted on the cylinder 2, while the primary radial bearing 302 and the primary bearing bushing 301 are combined to form an independent primary radial bearing component. Subsequently, the primary radial bearing component is assembled into the primary bearing support 401, which completes the detailed structure of the first gas bearing assembly. The second gas bearing assembly has a similar structure and function to the first gas bearing assembly, and therefore will not be described again here.
[0059] In addition, the primary bearing support 401 and the secondary bearing support 411 are respectively provided with a support precision adjustment part 5 and a bearing positioning part 6. The support precision adjustment part 5 adopts an L-shaped protrusion design, and the bearing positioning part 6 adopts a positioning protrusion design. The motor rotor 1 is provided with two clearance grooves 7 and two auxiliary end faces 8 at intervals along the axial direction.
[0060] The overall assembly process is as follows:
[0061] First, the primary bearing support 401 is installed on the primary side of the cylinder 2, and the secondary bearing support 411 is installed on the secondary side of the cylinder 2. Next, the motor rotor 1 is inserted from the primary side and passes through the primary bearing support 401 and the secondary bearing support 411 in sequence.
[0062] It should be noted that the precision of the primary bearing support 401 and the secondary bearing support 411 has been ensured through machining. During the insertion of the motor rotor 1 into the inner holes of the two bearing supports 4, the positional precision of these two bearing supports 4 is actually being adjusted. The outer circumferential surface of the motor rotor 1 (excluding the clearance groove 7) engages with the support precision adjustment part 5 on the two bearing supports 4, thereby allowing the positional precision of the two bearing supports 4 to be adjusted (precision range 1-2 μm). Figure 2 As shown, when an auxiliary end face 8 (the inner end face on the first-stage side) of the motor rotor 1 is not aligned with the outer end face of the first-stage bearing support 401, it indicates that the precision adjustment parts of the motor rotor 1 (non-avoidance groove 7) and the two bearing supports 4 have been properly fitted. At this time, the two radial bearing components 3 can be installed.
[0063] Next, the primary radial bearing component is assembled into the primary bearing support 401, and the secondary radial bearing component is assembled into the secondary bearing support 411.
[0064] It should be noted that the precision of the primary and secondary radial bearing components is controlled through precision machining (precision range of 1-2 μm). Therefore, after the two radial bearing components 3 are installed, the positional accuracy of the two bearing supports 4 and the two radial bearing components 3 in the air-suspended centrifugal compressor is guaranteed, and the suspension accuracy of the motor rotor 1 can be well within 5 μm, which greatly improves production efficiency compared with the existing technology.
[0065] Then, the motor rotor 1 is gently pushed from the first-stage side so that the two clearance grooves 7 of the motor rotor 1 cooperate with the support precision adjustment parts 5 of the two bearing supports 4 to avoid interference between the motor rotor 1 and the bearing supports 4 during operation.
[0066] It should be pointed out that, as Figure 4 As shown, during the process of pushing the motor rotor 1, the alignment between the clearance groove 7 of the motor rotor 1 and the support precision adjustment part 5 of the bearing support 4 is determined by whether an auxiliary end face 8 (the end face of the inner part of the first stage side) of the motor rotor 1 is flush with the outer end face of the first stage bearing support 401.
[0067] In a preferred embodiment of this invention, the fit between the bearing support 4's support precision adjustment part 5 and the outer peripheral surface of the motor rotor 1 achieves the required accuracy (range 1-2 μm) for the positional and concentricity between the bearing support 4 and the motor rotor 1. Simultaneously, the precision-machined radial bearing component 3 (range 1-2 μm) is positioned by the bearing positioning part 6 inside the bearing support 4. This ensures the accuracy requirements for positional and concentricity between the bearing support 4, the radial bearing component 3, and the motor rotor 1, thereby improving the levitation accuracy of the motor rotor 1. Furthermore, two clearance grooves 7 are provided on the outer peripheral surface of the motor rotor 1. After the accuracy calibration is completed between the smooth surface of the motor rotor 1 and the support precision adjustment part 5 of the bearing support 4, the clearance grooves 7 must be positioned to avoid interference between the motor rotor 1 and the bearing structure during operation, ensuring the levitation accuracy, stability, and safety of the motor rotor 1 at high speeds.
[0068] Compared to existing bearing structures, this invention significantly reduces production costs and improves production efficiency. Specifically, in existing technologies, the radial bearing 31 needs to be installed inside the bearing support 4. Before installing the radial bearing 31, the bearing support 4 needs to be installed on the cylinder 2 and machined multiple times to ensure the bearing accuracy is within 5. This process is interconnected and cannot be performed simultaneously, making it difficult to control the accuracy of the bearing support 4. In the air-suspension rotation structure proposed in this invention, the accuracy of the bearing supports 4 on both sides is controlled and calibrated using the new structural features and the fit with the motor rotor 1. At the same time, the radial bearing 31 can also be installed into the bearing bushing 32 to form the radial bearing component 3. After the positional accuracy of the bearing support 4 is calibrated, the installation of the radial bearing component 3 can be started directly without the need for repeated disassembly and reassembly of the bearing support 4 and multiple machine operations. With the new air-suspension rotation structure, the accuracy of the bearing support 4 is improved, and the accuracy adjustment process is more convenient. As a result, the suspension accuracy of the motor rotor 1 is easier to control, thereby achieving higher accuracy and improving the stability and safety of the motor rotor 1 in the air-suspension centrifugal compressor under suspension.
[0069] In the description of this utility model, it should be understood that, unless otherwise expressly specified and limited, when an element is referred to as "fixed to" or "set on" another element, it may be directly on or indirectly on the other element. When an element is referred to as "connected to" another element, it may be directly connected to or indirectly connected to the other element.
[0070] Furthermore, the terms "center," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0071] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.
[0072] Furthermore, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0073] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. An air supported rotating structure comprising a motor rotor and a gas bearing assembly mounted within a cylinder and arranged to support the motor rotor, characterised in that, The gas bearing assembly includes a radial bearing component sleeved on the motor rotor and a bearing support sleeved on the radial bearing component. The bearing support is provided with a support accuracy adjustment part, which is used to cooperate with the outer peripheral surface of the motor rotor during the process of the motor rotor extending into the bearing support, so as to calibrate the position accuracy of the bearing support.
2. An air levitated rotating structure as claimed in claim 1, wherein, The bearing support is provided with a bearing positioning part for positioning the radial bearing component.
3. The air-suspended rotation structure as described in claim 2, characterized in that, The support precision adjustment part is an L-shaped protrusion located at the end of the bearing support.
4. The air-suspended rotating structure as described in claim 3, characterized in that, The outer circumferential surface of the motor rotor is provided with a relief groove corresponding to the L-shaped protrusion.
5. The air-suspended rotating structure as described in claim 4, characterized in that, An auxiliary end face is provided on the outer circumferential surface of the motor rotor. When the auxiliary end face is flush with the outer end face of the radial bearing component, the clearance groove is aligned with the vertical section of the L-shaped protrusion.
6. The air-suspended rotating structure as described in claim 3, characterized in that, The bearing positioning part is a positioning protrusion located at the connection between the L-shaped protrusion and the bearing support, and the positioning protrusion abuts against the inner end face of the radial bearing component.
7. The air-suspended rotating structure as described in claim 1, characterized in that, The radial bearing component includes a radial bearing and a bearing bushing fitted on the radial bearing.
8. The air-suspended rotating structure as described in any one of claims 1-7, characterized in that, The number of gas bearing assemblies is set to two, and the two gas bearing assemblies are spaced apart and sleeved on the outer peripheral surface of the motor rotor.
9. The air-suspended rotating structure as described in any one of claims 1-7, characterized in that, The bearing support is provided with a snap-fit part for snapping into the stepped surface inside the cylinder.
10. An air-suspension centrifugal compressor, characterized in that, Includes the air-suspension rotating structure as described in any one of claims 1-9.