Shaft support device and compressor

Abstract

This utility model discloses a shaft support device and a compressor. The shaft support device of this utility model includes a bearing assembly and a displacement detection mechanism. The bearing assembly has a shaft mounting hole and includes a mounting base component. The mounting base component includes a first mounting base, which includes a base body and a probe fixing part. Along the axial direction of the shaft mounting hole, the probe fixing part is located on one side of the base body and is integrally formed with the base body. The probe fixing part has a partial shaft mounting hole, and the first inner circumferential surface of the partial shaft mounting hole of the probe fixing part is provided with a probe mounting hole. The displacement detection mechanism includes a displacement detection probe, at least a portion of which is located within the probe mounting hole. The base body and the probe fixing part are an integral structure, which avoids coaxiality errors caused by assembly, ensuring better coaxiality between the probe fixing part and the base body. This guarantees the installation accuracy of the displacement detection probe, reduces the number of parts, simplifies assembly, and improves assembly efficiency.

Description

Technical Field

[0001] This utility model relates to the field of air compression technology, and in particular to a rotating shaft support device and a compressor. Background Technology

[0002] This section provides only background information relevant to this disclosure and is not necessarily prior art.

[0003] Magnetic levitation centrifugal compressors are widely used in industrial fields, mainly including high-speed rotating machinery such as magnetic levitation centrifugal refrigeration compressors, magnetic levitation air compressors, and magnetic levitation blowers. A common feature of magnetic levitation centrifugal compressors is that they are supported by bearings, and the rotor is suspended using magnetic levitation bearings. The displacement sensor is the component that identifies the suspended position and provides position feedback. Currently, the bearing housing and the probe holder of the displacement sensor in a magnetic levitation centrifugal compressor are connected by screws. The probe holder houses the displacement detection probe. This connection method is inconvenient for assembly and results in poor coaxiality between the probe holder and the bearing housing. Utility Model Content

[0004] The purpose of this invention is to at least solve the problem of inconvenient assembly caused by the need for separate assembly of the bearing housing and the probe fixing component. This objective is achieved through the following technical solution:

[0005] The first aspect of this utility model provides a rotating shaft support device, comprising:

[0006] The bearing assembly has a shaft mounting hole. The bearing assembly includes a mounting base component, which includes a first mounting base. The first mounting base includes a base body and a probe fixing part. Along the axial direction of the shaft mounting hole, the probe fixing part is located on one side of the base body and is integrally formed with the base body. The probe fixing part has a partial shaft mounting hole. The first inner circumferential surface of the partial shaft mounting hole of the probe fixing part is provided with a probe mounting hole.

[0007] A displacement detection mechanism, including a displacement detection probe, wherein at least part of the displacement detection probe is located inside a probe mounting hole.

[0008] According to the rotating shaft support device of this utility model, the base and the probe fixing part are integrated into one structure. This integrated machining process reduces the number of parts, simplifies assembly, and improves assembly efficiency. Furthermore, it avoids coaxiality errors that may occur during assembly, ensuring better coaxiality between the probe fixing part and the base, thereby guaranteeing the installation accuracy of the displacement detection probe.

[0009] In addition, the rotating shaft support device according to this utility model may also have the following additional technical features:

[0010] In some embodiments of this utility model, the first mounting base is provided with a clearance structure on one side along the axial direction of the shaft mounting hole. The clearance structure includes either a clearance hole or a clearance groove, and the clearance structure is connected to the probe mounting hole.

[0011] In some embodiments of this utility model, the displacement detection mechanism further includes a displacement detection circuit board, which is electrically connected to the displacement detection probe. The displacement detection circuit board is disposed on one side of the first mounting base along the axial direction of the shaft mounting hole.

[0012] In some embodiments of this utility model, the displacement detection circuit board is provided with mounting holes around the shaft.

[0013] In some embodiments of this utility model, the first mounting base has a lead wire channel that extends through the outer surface of the first mounting base. The displacement detection circuit board is electrically connected to a wiring terminal, with one end of the wiring terminal away from the displacement detection circuit board passing through the lead wire channel.

[0014] In some embodiments of this utility model, there are multiple displacement detection probes, which are spaced apart along the circumferential direction of the shaft mounting hole.

[0015] In some embodiments of this utility model, the mounting base component has a receiving cavity, and the bearing assembly further includes an axial magnetic levitation bearing located within the receiving cavity. The axial magnetic levitation bearing has a partial shaft mounting hole and includes:

[0016] A first magnetic pole plate and a second magnetic pole plate are connected and together define an accommodating space. At least one of the first and second magnetic pole plates is connected to a mounting base component. Along the axial direction of the shaft mounting hole, the first magnetic pole plate is located on the side of the second magnetic pole plate opposite to the displacement detection probe.

[0017] The axial bearing winding is located within the housing space.

[0018] In some embodiments of this utility model, the mounting base component further includes a second mounting base. Along the axial direction of the shaft mounting hole, the second mounting base is located at one end of the first mounting base and is connected to the first mounting base. The second mounting base is connected to the first magnetic pole plate.

[0019] In some embodiments of this utility model, the bearing assembly further includes a radial magnetic levitation bearing, which has a partial shaft mounting hole. Along the axial direction of the shaft mounting hole, the radial magnetic levitation bearing is located between the axial magnetic levitation bearing and the displacement detection probe. The radial magnetic levitation bearing also includes:

[0020] cylindrical body;

[0021] The radial bearing core is located on the inner circumferential surface of the cylinder.

[0022] In some embodiments of this utility model, the bearing assembly further includes a protective bearing, which has a partial shaft mounting hole. The mounting base component is provided with a protective bearing mounting hole. The protective bearing is located inside the protective bearing mounting hole and mates with the inner circumferential surface of the protective bearing mounting hole. The second mounting base is provided with a protective bearing mounting hole on its outer end face along the axial direction of the shaft mounting hole.

[0023] In some embodiments of this utility model, at least one of the protective bearing, the axial magnetic levitation bearing, and the radial magnetic levitation bearing is arranged coaxially with the first inner circumferential surface.

[0024] The second aspect of this utility model provides a compressor, including a rotor and a shaft support device as described in the first aspect. The rotor includes a shaft that passes through a shaft mounting hole and is clearance-fitted with the shaft mounting hole. Attached Figure Description

[0025] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0026] Figure 1 A schematic diagram of the structure of a rotating shaft support device according to some embodiments of the present invention is shown.

[0027] Figure 2 for Figure 1 AA section view;

[0028] Figure 3 An isometric view from a first perspective is shown schematically of a first mounting base in a pivot support device according to some embodiments of the present invention.

[0029] Figure 4 The diagram schematically shows an axonometric view of the first mounting base in a pivot support device according to some embodiments of the present invention from a second perspective.

[0030] Figure 5 A partial cross-sectional view of a compressor according to some embodiments of the present invention is shown schematically, passing through the axis of the rotating shaft.

[0031] The attached figures are labeled as follows:

[0032] 910. Compressor;

[0033] 91. Shaft support device; 92. Shaft; 93. Thrust disc;

[0034] 911, Bearing assembly; 91101, Shaft mounting hole;

[0035] 9101. Mounting base component; 9111. First mounting base; 91111. Base body; 91112. Probe fixing part; 91113. Probe mounting hole; 91114. Clearance structure; 91115. Lead wire channel; 91116. First inner circumferential surface; 9112. Second mounting base; 91121. Protective bearing mounting hole;

[0036] 9102, Axial magnetic levitation bearing; 91021, First magnetic pole plate; 91022, Second magnetic pole plate; 91023, Axial bearing winding;

[0037] 9103, Radial magnetic levitation bearing; 91031, Cylinder body; 91032, Radial bearing core;

[0038] 9104. Protect the bearing;

[0039] 912, Displacement detection mechanism; 9121, Displacement detection probe; 9122, Displacement detection circuit board. Detailed Implementation

[0040] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0041] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “described” as used herein may also include the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a particular order described or illustrated unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.

[0042] Although terms such as first, second, third, etc., may be used in this document to describe multiple elements, components, regions, layers, and / or segments, these elements, components, regions, layers, and / or segments should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or segment from another. Unless the context clearly indicates otherwise, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence. Therefore, the first element, component, region, layer, or segment discussed below may be referred to as the second element, component, region, layer, or segment without departing from the teachings of the exemplary embodiments.

[0043] For ease of description, spatial relative terms may be used in the text to describe the relationship of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "below," "above," "over," etc. Such spatial relative terms are intended to include different orientations of the device in use or operation, other than those depicted in the figure. For example, if the device in the figure is flipped, an element described as "below other elements or features" or "below other elements or features" would subsequently be oriented as "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions), and the spatial relative descriptors used in the text will be interpreted accordingly.

[0044] like Figure 1 and Figure 2 As shown, according to an embodiment of the present invention, a rotating shaft support device 91 is proposed, including a bearing assembly 911 and a displacement detection mechanism 912. The bearing assembly 911 has a shaft mounting hole 91101 and includes a mounting base component 9101. The mounting base component 9101 includes a first mounting base 9111, which includes a base body 91111 and a probe fixing part 91112. Along the axial direction of the shaft mounting hole 91101, the probe fixing part 91112 is located on one side of the base body 91111 and is integrally formed with the base body 91111. The probe fixing part 91112 has a portion of the shaft mounting hole 91101, and a probe mounting hole 91113 is provided on the first inner circumferential surface 91116 of the portion of the shaft mounting hole 91101 in the probe fixing part 91112. The displacement detection mechanism 912 includes a displacement detection probe 9121, at least a portion of which is located within the probe mounting hole 91113.

[0045] Displacement detection probes 9121 can be symmetrically arranged within the first inner circumferential surface 91116, respectively installed within the probe mounting holes 91113, and fixed by means of glue or threaded connection. Alternatively, three displacement detection probes 9121 can be installed on the first inner circumferential surface 91116, evenly distributed at 120° intervals along the circumference of the first inner circumferential surface 91116, or more than four displacement detection probes 9121 can be installed.

[0046] The probe fixing part 91112 is an annular structure surrounding the axis of the shaft mounting hole 91101.

[0047] The bearing assembly 911 includes at least one bearing, and may specifically include multiple bearings, specifically one or more of radial bearings and axial bearings. For example, the bearing assembly 911 includes one or more of radial magnetic bearing 9103, axial magnetic bearing 9102, radial roller bearing, or radial ball bearing.

[0048] According to the rotating shaft support device 91 of this utility model, the base 91111 and the probe fixing part 91112 are integral structures. By integrally forming, the number of parts can be reduced, assembly can be simplified, and assembly efficiency can be improved. In addition, it can avoid the coaxiality error caused by the assembly of the two, so that the probe fixing part 91112 and the base 91111 have good coaxiality, thereby ensuring the installation accuracy of the displacement detection probe 9121.

[0049] Please refer to some embodiments of this utility model. Figure 3 The first mounting base 9111 is provided with a clearance structure 91114 on one side along the axial direction of the shaft mounting hole 91101. The clearance structure 91114 includes either a clearance hole or a clearance groove, and the clearance structure 91114 is connected to the probe mounting hole 91113.

[0050] The number of probe mounting holes 91113 is the same as the number of displacement detection probes 9121. In one example, there are multiple probe mounting holes 91113, which are evenly arranged circumferentially along the shaft mounting hole 91101. Each probe mounting hole 91113 is connected to a clearance structure 91114. In another example, the clearance structure 91114 can be a clearance groove, which is arranged around the axis of the shaft mounting hole 91101, and the multiple probe mounting holes 91113 are connected to the clearance groove.

[0051] The probe mounting hole 91113 is connected to the clearance structure 91114, allowing the probe mounting hole 91113 to pass through the side wall of the clearance structure 91114. This reduces the depth of the probe mounting hole 91113, which facilitates the installation and wiring of the displacement detection probe 9121, and also facilitates the processing and manufacturing of the probe mounting hole 91113.

[0052] Please refer to some embodiments of this utility model. Figure 4 The displacement detection mechanism 912 also includes a displacement detection circuit board 9122, which is electrically connected to the displacement detection probe 9121. Along the axial direction of the shaft mounting hole 91101, the displacement detection circuit board 9122 is disposed on one side of the first mounting base 9111.

[0053] Along the axial direction of the shaft mounting hole 91101, the displacement detection circuit board 9122 can be disposed on the outside of the mounting base member 9101 or on the inside of the mounting base member 9101.

[0054] The displacement detection circuit board 9122 can be fixed to the mounting base component 9101 by means of screws, snap-fit, or adhesive.

[0055] The displacement detection circuit board 9122 can be connected to the displacement detection probe 9121 via leads, or it can be electrically connected to the displacement detection probe 9121 via soldering or plugging.

[0056] Therefore, the displacement detection circuit board 9122 and the displacement detection probe 9121 can be arranged adjacent to each other, which facilitates the electrical connection between the two.

[0057] Please refer to some embodiments of this utility model. Figure 4 The displacement detection circuit board 9122 is set around the mounting hole 91101 on the shaft.

[0058] This reduces the space occupied by the displacement detection circuit board 9122 in the radial direction along the axial mounting hole 91101, making the structure more compact.

[0059] Please refer to some embodiments of this utility model. Figure 4 The first mounting base 9111 has a lead wire channel 91115, which runs through the outer surface of the first mounting base 9111. The displacement detection circuit board 9122 is electrically connected to a wire, and one end of the wire away from the displacement detection circuit board 9122 passes through the lead wire channel 91115.

[0060] The lead wire channel 91115 can penetrate the outer peripheral surface of the first mounting base 9111 in the radial direction of the shaft mounting hole 91101, or it can penetrate the end face of the first mounting base 9111 in the axial direction of the shaft mounting hole 91101.

[0061] In one example, the probe fixing part 91112 forms part of the wall of the receiving cavity, and the inner surface of the probe fixing part 91112 is formed with a mounting groove. The mounting groove is arranged around the axis of the shaft mounting hole 91101. The displacement detection circuit board 9122 is located in the mounting groove and is fixed to the probe fixing part 91112 by screws. The lead wire channel 91115 passes through the peripheral wall of the receiving cavity in the radial direction of the shaft mounting hole 91101.

[0062] To reduce wiring bends, it is better for the lead wire channel 91115 to extend through the outer circumference of the first mounting base 9111 in the radial direction of the shaft mounting hole 91101.

[0063] The lead-out channel 91115 facilitates the routing of wires.

[0064] Please refer to some embodiments of this utility model. Figure 2 The mounting base component 9101 has a receiving cavity, and the bearing assembly 911 further includes an axial magnetic levitation bearing 9102 located within the receiving cavity. The axial magnetic levitation bearing 9102 has a partial shaft mounting hole 91101 and includes a first magnetic pole plate 91021, a second magnetic pole plate 91022, and an axial bearing winding 91023. The first magnetic pole plate 91021 and the second magnetic pole plate 91022 are connected and together define the receiving space. At least one of the first magnetic pole plate 91021 and the second magnetic pole plate 91022 is connected to the mounting base component 9101. Along the axial direction of the shaft mounting hole 91101, the first magnetic pole plate 91021 is located on the side of the second magnetic pole plate 91022 opposite to the displacement detection probe 9121. The axial bearing winding 91023 is located within the receiving space.

[0065] The cavity can be a cavity surrounding the axis of the shaft mounting hole 91101.

[0066] The receiving cavity forms a first port and a second port at both ends of the mounting base member 9101.

[0067] The connection methods of the first magnetic pole plate 91021 and the second magnetic pole plate 91022 include, but are not limited to, screw connection, riveting or welding.

[0068] The connection between at least one of the first magnetic pole plate 91021 and the second magnetic pole plate 91022 and the mounting base component 9101 includes, but is not limited to, screw connection, welding or snap-fit ​​connection.

[0069] After the rotating shaft 92 passes through the axial magnetic levitation bearing 9102, a thrust disk 93 is installed on the rotating shaft 92. The thrust disk 93 is fixedly installed on the rotating shaft 92 and is located between the first magnetic pole plate 91021 and the second magnetic pole plate 91022. Through the magnetic force of the first magnetic pole plate 91021 and the magnetic force of the second magnetic pole plate 91022, the axial force on the thrust disk 93 can be adjusted so as to adjust its axial displacement during the levitation and rotation of the rotating shaft 92.

[0070] The axial magnetic levitation bearing 9102 can adjust the axial displacement of the rotating shaft 92, thereby reducing the frictional resistance of the rotating shaft 92 in the suspended state and improving the efficiency of mechanical transmission.

[0071] Please refer to some embodiments of this utility model. Figure 2 The mounting base component 9101 also includes a second mounting base 9112. Along the axial direction of the shaft mounting hole 91101, the second mounting base 9112 is located at one end of the first mounting base 9111 and is connected to the first mounting base 9111. The second mounting base 9112 is connected to the first magnetic pole plate 91021.

[0072] The connection methods between the second mounting base 9112 and the first magnetic pole plate 91021 include, but are not limited to, screw connection, riveting or welding.

[0073] The connection methods of the first mounting base 9111 and the second mounting base 9112 include, but are not limited to, screw connection, riveting, welding or integral molding.

[0074] In one example, during the manufacturing process, the first mounting base 9111 and the second mounting base 9112 are integrally machined to form a bearing housing. The bearing housing is split along the axis of the shaft mounting hole 91101 to form two parts. The two parts are connected by screws or bolts to form the bearing housing, that is, the bearing housing is a semi-split housing.

[0075] In another example, the first mounting base 9111 and the second mounting base 9112 are separate structures, which are connected and fixed by screws.

[0076] The first mounting base 9111 and the second mounting base 9112 respectively form a partial receiving cavity, and the two are connected to each other to jointly define the receiving cavity.

[0077] The second mounting base 9112 facilitates the installation of components such as the axial magnetic levitation bearing 9102 into the receiving cavity.

[0078] Please refer to some embodiments of this utility model. Figure 2The bearing assembly 911 also includes a radial magnetic levitation bearing 9103, which has a partial shaft mounting hole 91101. Along the axial direction of the shaft mounting hole 91101, the radial magnetic levitation bearing 9103 is located between the axial magnetic levitation bearing 9102 and the displacement detection probe 9121. The radial magnetic levitation bearing 9103 also includes a cylindrical body 91031 and a radial bearing core 91032. The radial bearing core 91032 is disposed on the inner circumferential surface of the cylindrical body 91031.

[0079] The radial bearing core 91032 has multiple slots, which are evenly arranged along the circumferential direction of the shaft mounting hole 91101. Two adjacent slots form a tooth, and a coil is wound around each tooth, with part of the coil located inside the slot. During operation, the cylinder 91031 and the radial bearing core 91032 constitute a magnetic circuit.

[0080] In one example, multiple permanent magnets are mounted on the outer peripheral surface of the rotating shaft 92. Under the magnetic force of the radial magnetic levitation bearing 9103, the permanent magnets pull the rotating shaft 92 up using the attraction property of opposite magnetic poles. The displacement of the rotating shaft 92 is detected by the displacement detection mechanism 912, and the magnetic force of the radial magnetic levitation bearing 9103 can be adjusted to center the rotating shaft 92 in the shaft mounting hole 91101. The specific principle of the radial magnetic levitation bearing 9103 controlling the levitation of the rotating shaft 92 is the same as that in the prior art and will not be described in detail here.

[0081] The radial magnetic bearing 9103 exerts a magnetic force on the rotating shaft 92, causing the rotating shaft 92 to levitate under the action of the magnetic force. This reduces the resistance during the rotation of the rotating shaft 92. Compared with ordinary radial bearings, this reduces the trouble of frequent replacements due to wear of the radial bearings and improves the efficiency of mechanical transmission.

[0082] Please refer to some embodiments of this utility model. Figure 2 The bearing assembly 911 also includes a protective bearing 9104, which has a partial shaft mounting hole 91101. The mounting base member 9101 has a protective bearing mounting hole 91121 on its outer end face along the axial direction of the shaft mounting hole 91101. The protective bearing 9104 is located inside the protective bearing mounting hole 91121 and mates with the inner circumferential surface of the protective bearing mounting hole 91121. The second mounting base 9112 is provided with the protective bearing mounting hole 91121.

[0083] The clearance between the protective bearing 9104 and the rotating shaft 92 can be, but is not limited to, 0.05mm-0.1mm.

[0084] Under heavy load conditions, the protective bearing 9104 can be a double-row ball bearing or a double-row cylindrical roller bearing.

[0085] In one example, a limiting protrusion is formed on the inner surface of the protective bearing mounting hole 91121. The limiting protrusion acts as an axial limit for the protective bearing 9104, allowing the outer ring of the protective bearing 9104 to abut against the limiting protrusion during installation.

[0086] The protective bearing 9104 serves as an auxiliary support. When the shaft 92 is not working, the shaft 92 will not fall in a suspended state. In order to prevent the shaft 92 from falling and colliding with other components and causing damage to the shaft 92, the protective bearing 9104 can provide auxiliary support for the shaft 92.

[0087] Please refer to some embodiments of this utility model. Figure 2 There are multiple displacement detection probes 9121, which are spaced apart along the circumferential direction of the shaft mounting hole 91101.

[0088] In one example, there are four displacement detection probes 9121, which are equally spaced along the circumferential direction of the shaft mounting hole 91101.

[0089] Multiple displacement detection probes 9121 are provided, which can detect the radial displacement of the rotating shaft 92 along the circumferential direction. The position of the rotating shaft 92 can be adjusted according to different displacement detection probes 9121, thereby facilitating the adjustment of the radial position of the rotating shaft 92.

[0090] Please refer to some embodiments of this utility model. Figure 2 At least one of the three components—protective bearing 9104, axial magnetic bearing 9102, and radial magnetic bearing 9103—is coaxially arranged with the first inner circumferential surface 91116.

[0091] Therefore, the axis of the shaft mounting hole 91101 of at least one of the three bearings 9104, axial magnetic levitation bearing 9102 and radial magnetic levitation bearing 9103 can be used as the positioning reference, so that the axis of the first inner circumferential surface 91116 is consistent with the positioning reference, thereby ensuring the installation accuracy of the displacement detection probe 9121.

[0092] In some embodiments of this utility model, the displacement detection mechanism 912 can be disposed on the side of the protective bearing 9104 away from the axial magnetic levitation bearing 9102, or between the axial magnetic levitation bearing 9102 and the radial magnetic levitation bearing 9103, or on the side of the radial magnetic levitation bearing 9103 away from the protective bearing 9104.

[0093] Please refer to Figure 5According to the embodiments of the present invention, a compressor 910 is proposed, including a rotor and a shaft support device 91 of the above embodiments. The rotor includes a shaft 92, which passes through a shaft mounting hole 91101 and is clearance-fitted with the shaft mounting hole 91101.

[0094] The outer circumferential surface of the rotor is provided with multiple permanent magnets, which are evenly distributed along the circumference of the rotating shaft 92.

[0095] In one example, the compressor 910 also includes a housing, within which a shaft support 91 is mounted. A stator is installed within the housing, with a clearance fit between the stator and the rotor, which rotates under the action of the stator.

[0096] Since the compressor 910 includes all the technical features of the shaft support device 91 of the above embodiments, its effect is the same as described above, and will not be repeated here.

[0097] The above description is merely a preferred embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A rotating shaft support device characterized by comprising: include: A bearing assembly having a shaft mounting hole, the bearing assembly including a mounting base component, the mounting base component including a first mounting base, the first mounting base including a base body and a probe fixing part, along the axial direction of the shaft mounting hole, the probe fixing part is located on one side of the base body and is integrally formed with the base body, the probe fixing part has a portion of the shaft mounting hole, and the first inner circumferential surface of the portion of the shaft mounting hole of the probe fixing part is provided with a probe mounting hole; A displacement detection mechanism includes a displacement detection probe, at least a portion of which is located within a probe mounting hole.

2. The pivot support apparatus according to claim 1, characterized by The first mounting base has a clearance structure on one side along the axial direction of the shaft mounting hole. The clearance structure includes either a clearance hole or a clearance groove, and the clearance structure communicates with the probe mounting hole.

3. The pivot support apparatus according to claim 1, characterized by The displacement detection mechanism further includes a displacement detection circuit board, which is electrically connected to the displacement detection probe and is disposed on one side of the first mounting base along the axial direction of the shaft mounting hole.

4. The pivot support apparatus according to claim 3, characterized by The displacement detection circuit board is arranged around the mounting hole of the shaft.

5. The pivot support apparatus according to claim 3, wherein The first mounting base has a lead wire channel that extends through the outer surface of the first mounting base. The displacement detection circuit board is electrically connected to a wire, and one end of the wire that is away from the displacement detection circuit board passes through the lead wire channel.

6. The pivot support apparatus according to claim 1, characterized by The number of displacement detection probes is multiple, and the multiple displacement detection probes are spaced apart along the circumferential direction of the shaft mounting hole.

7. The pivot support apparatus according to any one of claims 1 to 6, characterized by The mounting base component has a receiving cavity, and the bearing assembly further includes an axial magnetic levitation bearing located within the receiving cavity. The axial magnetic levitation bearing has a portion of the shaft mounting hole, and the axial magnetic levitation bearing includes: A first magnetic pole plate and a second magnetic pole plate are connected and together define an accommodating space. At least one of the first and second magnetic pole plates is connected to the mounting base component. Along the axial direction of the shaft mounting hole, the first magnetic pole plate is located on the side of the second magnetic pole plate opposite to the displacement detection probe. The axial bearing winding is located within the accommodating space.

8. The pivot support apparatus according to claim 7, characterized by The mounting base component further includes a second mounting base along the axial direction of the shaft mounting hole. The second mounting base is located at one end of the first mounting base and is connected to the first mounting base. The second mounting base is connected to the first magnetic pole plate.

9. The pivot support apparatus of claim 8, wherein The bearing assembly further includes a radial magnetic levitation bearing having a portion of the shaft mounting hole. Along the axial direction of the shaft mounting hole, the radial magnetic levitation bearing is located between the axial magnetic levitation bearing and the displacement detection probe. The radial magnetic levitation bearing also includes: cylindrical body; A radial bearing core is disposed on the inner circumferential surface of the cylinder.

10. The pivot support apparatus according to claim 9, wherein The bearing assembly further includes a protective bearing having a portion of the shaft mounting hole. The mounting base component has a protective bearing mounting hole, the protective bearing is located within the protective bearing mounting hole and mates with the inner circumferential surface of the protective bearing mounting hole, and the second mounting base has the protective bearing mounting hole on its outer end face along the axial direction of the shaft mounting hole.

11. The pivot support apparatus according to claim 10, wherein At least one of the protective bearing, the axial magnetic bearing, and the radial magnetic bearing is arranged coaxially with the first inner circumferential surface.

12. A compressor characterized by, It includes a rotor and a shaft support device as described in any one of claims 1-11, wherein the rotor includes the shaft, the shaft passes through the shaft mounting hole and is clearance-fitted with the shaft mounting hole.

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