Magnetic suspension bearing, compressor and heating and ventilation equipment

Abstract

The utility model provides a magnetic suspension bearing, compressor and heating and ventilation equipment, the magnetic suspension bearing is sleeved outside a rotating shaft and is used for driving the rotating shaft to move along the self axial direction, the magnetic suspension bearing comprises a stator and a heat insulation piece, the stator is sleeved outside the rotating shaft, the stator is provided with a winding coil, and the heat insulation piece is arranged on the radial inner side of the winding coil. And heat insulation protection is carried out on the winding coil along the radial direction of the winding coil. According to the magnetic suspension bearing provided by the utility model, the heat insulation part is arranged at the winding coil to carry out heat insulation protection on the winding coil, so that the temperature of the winding coil is reduced, and the reliability of the magnetic suspension bearing is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of magnetic suspension bearings, in particular to a magnetic suspension bearing, a compressor and a heating and ventilation device. Background Art

[0002] This section merely provides background information related to the present disclosure and is not necessarily prior art.

[0003] The magnetic levitation compressor is a high-efficiency, environmentally friendly compressor that realizes oil-free bearings and has the advantages of no wear, high speed, high precision, and low noise. It is one of the future development trends of compressors.

[0004] When the magnetic levitation compressor is working, the axial magnetic levitation bearing is close to the impeller and the temperature is relatively high. The high-temperature gas leakage from the back of the impeller into the compressor will also make the working environment of the axial magnetic levitation bearing worse, thereby reducing the reliability of the axial magnetic levitation bearing. Utility Model Content

[0005] The purpose of the utility model is to at least solve the technical problem of low reliability of existing axial magnetic suspension bearings. This purpose is achieved through the following technical solutions:

[0006] The first aspect of the utility model provides a magnetic suspension bearing, which is sleeved on the outside of a rotating shaft and is used to drive the rotating shaft to move along its own axial direction, comprising:

[0007] A stator is sleeved on the outside of the rotating shaft, and the stator has a winding coil;

[0008] A heat insulating member is arranged on the radial inner side of the winding coil and is used to provide heat insulation protection to the winding coil along the radial direction of the winding coil.

[0009] The magnetic suspension bearing proposed by the utility model provides a heat insulation piece at the winding coil to provide heat insulation protection for the winding coil, so as to reduce the temperature of the winding coil and further improve the reliability of the magnetic suspension bearing.

[0010] In addition, the magnetic bearing according to the utility model may also have the following additional technical features:

[0011] In some embodiments of the present invention, the stator further has an annular groove, which is configured to be coaxially arranged with the rotating shaft, and the annular groove is configured to have an opening facing the rotating shaft, and at least the winding coil among the winding coil and the thermal insulation member is arranged in the annular groove.

[0012] In some embodiments of the present invention, the stator includes a first stator thrust plate and a second stator thrust plate, both of which are configured to be coaxially arranged with the rotating shaft, and the annular groove is defined between the first stator thrust plate and the second stator thrust plate.

[0013] In some embodiments of the present invention, the thermal insulation member is in an annular structure and blocks the opening.

[0014] In some embodiments of the present invention, the magnetic bearing further comprises a rotor thrust plate, wherein the rotor thrust plate is configured to be sleeved between the stator and the rotating shaft, and the thermal insulation member is sandwiched between the winding coil and the rotor thrust plate.

[0015] In some embodiments of the present invention, the radial outer side of the rotor thrust plate extends into the annular groove.

[0016] A second aspect of the utility model provides a compressor, comprising:

[0017] chassis;

[0018] A rotating shaft is rotatably disposed in the housing;

[0019] The axial magnetic suspension bearing assembly comprises the magnetic suspension bearing proposed in the first aspect of the utility model, and the axial magnetic suspension bearing assembly is coaxial with the rotating shaft and fixedly connected.

[0020] The compressor proposed in the second aspect of the utility model has the same beneficial effects as the magnetic suspension bearing proposed in the first aspect of the utility model.

[0021] In some embodiments of the present invention, the axial magnetic bearing assembly further includes a support member, the support member is mounted on the housing, and the stator is mounted on the support member.

[0022] In some embodiments of the present invention, a supporting shoulder is formed on the outer peripheral surface of the rotating shaft, and the supporting shoulder has a supporting surface facing the first end of the rotating shaft. The rotor thrust plate of the axial magnetic bearing assembly is sleeved on the supporting shoulder, and the magnetic bearing is located between the supporting surface and the first end.

[0023] In some embodiments of the utility model, the rotating shaft includes a coaxially arranged rotating shaft body and an annular thrust protrusion, the annular thrust protrusion is sleeved on the rotating shaft body, and the annular thrust protrusion and the rotating shaft are an integrated structure, and the axial magnetic levitation bearing assembly is used to drive the annular thrust protrusion to move along its own axial direction.

[0024] The third aspect of the utility model provides a HVAC device, including the compressor provided in the second aspect of the utility model.

[0025] The HVAC equipment proposed in the third aspect of the utility model has the same beneficial effects as the magnetic suspension bearing proposed in the first aspect of the utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] By reading the detailed description of the preferred embodiment below, various other advantages and benefits will become clear to those of ordinary skill in the art. The accompanying drawings are only used for the purpose of illustrating the preferred embodiment and are not to be considered as limiting the present invention. Moreover, the same reference numerals are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0027] Figure 1 Schematically shows a partial structural diagram of a compressor from a first viewing angle according to an embodiment of the utility model;

[0028] Figure 2 Schematically shows a partial structural diagram of a compressor from a second viewing angle according to an embodiment of the utility model;

[0029] Figure 3 The schematic diagram of the partial cross-sectional structure of the compressor (split rotor thrust plate) according to the embodiment of the utility model is schematically shown;

[0030] Figure 4 The schematic diagram of the partial cross-sectional structure of the compressor (rotor thrust plate integrated with the rotating shaft) according to the embodiment of the utility model is schematically shown;

[0031] Figure 5 A schematic diagram of the structure of a radial magnetic bearing assembly and an axial magnetic bearing assembly installed on a rotating shaft according to an embodiment of the utility model is schematically shown;

[0032] The symbols in the accompanying drawings are as follows:

[0033] 100. compressor; 101. axial magnetic bearing assembly; 102. radial magnetic bearing assembly; 103. casing;

[0034] 10. stator; 11. winding coil; 12. first stator thrust plate; 13. second stator thrust plate; 14. support member; 15. annular groove;

[0035] 20. rotor thrust plate; 21. mounting hole;

[0036] 30. Thermal insulation;

[0037] 40. Rotating shaft; 41. Supporting shoulder; 401. Rotating shaft body; 402. Annular thrust protrusion. DETAILED DESCRIPTION

[0038] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0039] It should be understood that the terms used herein are only for the purpose of describing specific example embodiments and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "include", "comprise", "contain", and "have" are inclusive, and therefore specify the existence of stated features, steps, operations, elements and / or parts, but do not exclude the existence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not interpreted as necessarily requiring them to be performed in the specific order described or illustrated, unless the execution order is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0040] Although the terms first, second, third, etc. can be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments.

[0041] For ease of description, spatial relative terms may be used herein to describe the relationship of one element or feature relative to another element or feature as shown in the figure, such as "inside", "outside", "inner side", "outer side", "below", "below", "above", "above", etc. Such spatial relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figure. For example, if the device in the figure is turned over, then the elements described as "below other elements or features" or "below other elements or features" will 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 can be oriented otherwise (rotated 90 degrees or in other directions) and the spatial relative descriptors used in the text are interpreted accordingly.

[0042] like Figures 1 to 5 As shown, Figure 1 The A direction in the middle represents the axial direction of the rotating shaft 40 and the magnetic bearing. Figure 1 The B direction in the middle represents the radial direction of the rotating shaft 40 and the magnetic bearing. The first aspect of the utility model proposes a magnetic bearing, which is sleeved on the outside of the rotating shaft 40 and used to drive the rotating shaft 40 to move along its own axial direction. The magnetic bearing includes a stator 10 and a heat insulation member 30. The stator 10 is sleeved on the outside of the rotating shaft 40. The stator 10 has a winding coil 11. The stator 10 can provide an electromagnetic force to drive the rotating shaft 40 to move along its own axial direction. The heat insulation member 30 is used to provide heat insulation protection for the winding coil 11.

[0043] It can be understood that the rotating shaft 40 can be the rotating shaft 40 of the compressor 100 or other equipment with rotating parts, the rotating shaft 40 can be coaxially mounted with the rotor thrust disk 20, and the rotor thrust disk 20 can also be a part of the rotating shaft 40, the stator 10 is coaxially arranged on the outer peripheral side of the rotor thrust disk 20, and the magnetic suspension bearing generates an electromagnetic force to drive the rotor thrust disk 20 to move along its own axial direction after being energized, and the electromagnetic force can be controlled by controlling the current of the winding coil 11, so that the rotor thrust disk 20 is kept in a fixed position in the axial direction, and the radial magnetic suspension bearing assembly 102 is used to drive the rotating shaft 40 to be centered in the radial direction and keep it suspended, so that the rotating shaft 40 is kept in a balanced state. The heat insulation member 30 can be made of a heat insulation material or a low thermal conductivity material, and its shape can be annular, and it covers the side of the winding coil 11 facing the heat source, and the heat insulation member 30 can be fixed on the stator 10 by a snap-on method, and the winding coil 11 is thermally insulated and protected when the magnetic suspension bearing is running.

[0044] The magnetic suspension bearing proposed in the utility model provides a heat insulating member 30 at the winding coil 11 to provide heat insulation protection for the winding coil 11 so as to reduce the temperature of the winding coil 11 and thus improve the reliability of the magnetic suspension bearing.

[0045] In some embodiments of the present invention, the stator 10 further has an annular groove 15, which is configured to be coaxially arranged with the rotating shaft 40, and the annular groove 15 is configured to have an opening facing the rotating shaft 40, and at least the winding coil 11 among the winding coil 11 and the thermal insulation member 30 is arranged in the annular groove 15.

[0046] It can be understood that an annular groove 15 can be opened on the radial inner side of the stator 10 body to install the winding coil 11. The annular groove 15 is arranged around the rotating shaft 40, and the annular groove 15 is arranged toward the rotating shaft 40 to facilitate the installation of the winding coil 11. The annular groove 15 is arranged between the stator 10 body and the rotating shaft 40, and the thermal insulation member 30 can be fixed in the annular groove 15 by snapping.

[0047] In some embodiments of the present invention, the stator 10 includes a first stator thrust plate 12 and a second stator thrust plate 13 , both of which are configured to be coaxially arranged with the rotating shaft 40 , and an annular groove 15 is defined between the first stator thrust plate 12 and the second stator thrust plate 13 .

[0048] It can be understood that the first stator thrust plate 12 and the second stator thrust plate 13 can be arranged in sequence along the axial direction of the rotating shaft 40, and the first stator thrust plate 12 and the second stator thrust plate 13 can both be disc-type structures. The second stator thrust plate 13 can have a step-type structure on the side facing the first stator thrust plate 12, that is, this side has a height difference, so that an annular groove 15 is formed between the second stator thrust plate 13 and the first stator thrust plate 12, thereby facilitating the installation of the winding coil 11 and the thermal insulation component 30, and can also improve the compactness of the overall structure.

[0049] In some embodiments of the present invention, the heat insulating member 30 is annular in structure and blocks the opening.

[0050] It can be understood that the thermal insulation member 30 is annular in structure and is compatible with the opening of the annular groove 15, so that the thermal insulation member 30 can block the opening and reduce the phenomenon of hot air entering the annular groove 15, thereby reducing the temperature of the coil winding when the magnetic bearing is running and improving the reliability of the coil winding.

[0051] In some embodiments of the present invention, the magnetic bearing further includes a rotor thrust plate 20 , which is configured to be sleeved between the stator 10 and the rotating shaft 40 , and the thermal insulation member 30 is sandwiched between the winding coil 11 and the rotor thrust plate 20 .

[0052] It can be understood that the rotor thrust disc 20 and the rotating shaft 40 are separately arranged, the rotor thrust disc 20 is sleeved on the rotating shaft 40, and the winding coil 11 can be fixed on the stator 10 body and surround the outer peripheral side of the rotor thrust disc 20, so that the winding coil 11 can generate electromagnetic force to drive the rotor thrust disc 20 to move along its own axial direction after being energized. When the rotating shaft 40 rotates, heat will flow to the winding coil 11 through the rotor thrust disc 20. The heat insulation member 30 is arranged between the rotor thrust disc 20 and the winding coil 11 to effectively block the hot air from flowing to the winding coil 11, thereby improving the reliability of the winding coil 11.

[0053] In some embodiments of the present invention, the radial outer side of the rotor thrust plate 20 extends into the annular groove 15 .

[0054] It can be understood that the electromagnetic force generated by the stator 10 can act on the rotor thrust plate 20 to drive the rotor thrust plate 20 to move along its own axial direction, thereby playing an axial limiting role on the rotating shaft 40 connected to the rotor thrust plate 20.

[0055] The second aspect of the utility model provides a compressor 100, comprising a housing 103, a rotating shaft 40 and an axial magnetic bearing assembly 101. The rotating shaft 40 is rotatably disposed in the housing 103. The axial magnetic bearing assembly 101 includes the magnetic bearing provided in the first aspect of the utility model, and the axial magnetic bearing assembly 101 is coaxial with the rotating shaft 40 and fixedly connected.

[0056] The compressor 100 proposed in the second aspect of the utility model has the same beneficial effects as the magnetic bearing proposed in the first aspect of the utility model. The impeller of the compressor 100 is mounted on the rotating shaft 40, and the rotating shaft 40 is driven by a motor to rotate to generate centrifugal force to achieve pressurized output of the inhaled gas. The rotating shaft 40 of the compressor 100 is axially limited by an axial magnetic bearing assembly 101. The rotating shaft 40 is suspended and wear-free, and can achieve high speed and low noise. And the temperature of the winding coil 11 during operation is reduced by the thermal insulation 30, thereby improving reliability.

[0057] In some embodiments of the present invention, the axial magnetic bearing assembly 101 further includes a support member 14 , the support member 14 is mounted on the housing 103 , and the stator 10 is mounted on the support member 14 .

[0058] It is understandable that the support member 14 may be an annular structure, fixed to the housing 103 by clamping or bolting, and one end of the stator 10 may be fixed to the support member 14 by welding or clamping, so as to achieve fixed installation of the stator 10. Specifically, the radial cross section of the support member 14 may be L-shaped, having a groove for mounting the stator 10.

[0059] In some embodiments of the utility model, a supporting shoulder 41 is formed on the outer peripheral surface of the rotating shaft 40, the supporting shoulder 41 has a supporting surface facing the first end of the rotating shaft 40, the rotor thrust plate 20 has a mounting hole 21, the rotating shaft 40 is passed through the mounting hole 21, the rotor thrust plate 20 is mounted on the supporting shoulder 41, and the magnetic levitation bearing is located between the supporting surface and the first end.

[0060] It can be understood that the support shoulder 41 is stepped and arranged around the rotating shaft 40, so that the rotor thrust plate 20 can abut against the support surface when it is sleeved on the rotating shaft 40, and the support surface provides axial limitation for the rotor thrust plate 20, further improving the overall reliability. In addition, the rotor thrust plate 20 can also be integrally formed with the rotating shaft 40 to improve the strength of the structure.

[0061] In some embodiments of the utility model, the rotating shaft includes a coaxially arranged rotating shaft body 401 and an annular thrust protrusion 402, the annular thrust protrusion 402 is sleeved on the rotating shaft body 401, and the annular thrust protrusion 402 and the rotating shaft body 401 are an integrated structure, and the axial magnetic levitation bearing assembly 101 is used to drive the annular thrust protrusion 402 to move along its own axial direction.

[0062] It can be understood that the annular thrust protrusion 402 protrudes from the outer peripheral surface of the rotating shaft body 401 and is integrally formed with the rotating shaft body 401, so that it has higher strength. The annular thrust protrusion 402 is arranged around the rotating shaft body 401 in an annular structure, and the annular thrust protrusion 402 is magnetically matched with the stator 10. The stator 10 provides a magnetic force that drives the annular thrust protrusion 402 to move along the axial direction of the rotating shaft body 401, so that the annular thrust protrusion 402 can drive the rotating shaft body 401 to move along its axial direction, so that when the rotating shaft body 401 rotates, the annular thrust protrusion 402 is suspended between the annular groove 15 of the stator 10.

[0063] In some embodiments of the present invention, the compressor 100 further includes a radial magnetic bearing assembly 102, the rotating shaft 40 is passed through the rotor of the radial magnetic bearing assembly 102, and the radial magnetic bearing assembly 102 is used to provide an electromagnetic force to keep the rotating shaft 40 suspended in the radial direction.

[0064] It can be understood that when the radial magnetic bearing assembly 102 is energized when the rotating shaft 40 is running, the radial magnetic bearing assembly 102 generates electromagnetic force, and by controlling the current size, the rotating shaft 40 moves along its own radial direction and suspends in the center, so that the compressor 100 runs without wear and can achieve high speed and low noise.

[0065] The third aspect of the present invention provides a HVAC device, including the compressor 100 provided in the second aspect of the present invention.

[0066] The HVAC equipment proposed in the third aspect of the utility model has the same beneficial effects as the magnetic suspension bearing proposed in the first aspect of the utility model.

[0067] The above are only preferred specific implementations of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model shall be based on the protection scope of the claims.

Claims

1. A magnetic bearing, which is sleeved on the outside of a rotating shaft and is used to drive the rotating shaft to move along its own axial direction, characterized in that: include: A stator is sleeved on the outside of the rotating shaft, and the stator has a winding coil; A heat insulating member is arranged on the radial inner side of the winding coil and is used to provide heat insulation protection to the winding coil along the radial direction of the winding coil.

2. The magnetic bearing according to claim 1, characterized in that: The stator further comprises an annular groove, which is configured to be coaxially arranged with the rotating shaft and has an opening facing the rotating shaft. At least the winding coil among the winding coil and the thermal insulation member is arranged in the annular groove.

3. The magnetic bearing according to claim 2, characterized in that: The stator includes a first stator thrust plate and a second stator thrust plate. The first stator thrust plate and the second stator thrust plate are both configured to be coaxially arranged with the rotating shaft. The annular groove is defined between the first stator thrust plate and the second stator thrust plate.

4. The magnetic bearing according to claim 2, characterized in that: The heat insulating member is in an annular structure and blocks the opening.

5. The magnetic bearing according to claim 3 or 4, characterized in that: The magnetic bearing further comprises a rotor thrust plate, which is configured to be sleeved between the stator and the rotating shaft, and the heat insulating member is sandwiched between the winding coil and the rotor thrust plate.

6. The magnetic bearing according to claim 5, characterized in that: The radial outer side of the rotor thrust plate extends into the annular groove.

7. A compressor, characterized in that: include: chassis; A rotating shaft is rotatably disposed in the housing; An axial magnetic bearing assembly, wherein the axial magnetic bearing assembly comprises a magnetic bearing according to any one of claims 1 to 6, wherein the magnetic bearing is coaxial with the rotating shaft and is fixedly connected thereto.

8. The compressor according to claim 7, characterized in that The axial magnetic bearing assembly further includes a support member, wherein the support member is mounted on the housing, and the stator is mounted on the support member.

9. The compressor according to claim 7 or 8, characterized in that: A supporting shoulder is formed on the outer peripheral surface of the rotating shaft, and the supporting shoulder has a supporting surface facing the axial first end of the rotating shaft. The rotor thrust plate of the axial magnetic bearing assembly is sleeved on the supporting shoulder, and the magnetic bearing is located between the supporting surface and the first end.

10. The compressor according to claim 7 or 8, characterized in that: The rotating shaft comprises a rotating shaft body and an annular thrust protrusion which are coaxially arranged. The annular thrust protrusion is sleeved on the rotating shaft body, and the annular thrust protrusion and the rotating shaft are an integrated structure. The axial magnetic suspension bearing assembly is used to drive the annular thrust protrusion to move along its own axial direction.

11. A HVAC equipment, characterized in that: Comprising a compressor according to any one of claims 7 to 10.

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