A magnetic levitation compressor bearing refrigeration device

Abstract

This utility model belongs to the field of refrigeration technology, and specifically relates to a refrigeration device for a magnetic levitation compressor bearing, applicable to compressors with magnetic levitation bearings. The bearing refrigeration device includes an assembly cover, a radiator, a circulating pump, and a positioning assembly. The assembly cover is fixedly installed on the outer wall of the compressor housing, the circulating pump is fixed inside the assembly cover, and the radiator is fixed on the outside of the assembly cover and connected to the circulating pump. Positioning assemblies are connected to both ends of the stationary component of the magnetic levitation bearing, and the positioning assemblies are fixedly installed inside the housing. The follower component of the magnetic levitation bearing is installed around the rotor. The magnetic levitation bearing, positioning assembly, and rotor components form a refrigeration cavity. The positioning assembly consists of an outer ring seat and an inner ring seat. Outer ring grooves and inner ring grooves are respectively formed on the inner wall of the outer ring seat and the outer wall of the inner ring seat, which combine to form an annular passage. This utility model effectively reduces the temperature rise of the magnetic levitation bearing during operation and solves the overheating problem by optimizing the cooling path and heat dissipation design.

Description

Technical Field

[0001] This utility model belongs to the field of refrigeration technology, specifically relating to a magnetic levitation compressor bearing refrigeration device. Background Technology

[0002] With the development of compressor technology, especially in refrigeration fields such as air conditioning, refrigerators, and aerospace, the efficiency and stability of compressors are receiving increasing attention. Traditional mechanical compressor bearings suffer from significant energy loss due to substantial mechanical friction, and are prone to overheating during operation, affecting bearing lifespan and overall equipment efficiency. To address this issue, magnetic levitation bearings have emerged. They levitate rotor components using electromagnetic force, greatly reducing mechanical friction and improving system efficiency and reliability. However, magnetic levitation bearings are still susceptible to temperature increases during operation, especially during prolonged high-load operation, where overheating can lead to performance degradation or even damage.

[0003] Therefore, effectively dissipating heat from magnetic bearings to ensure their efficient and stable operation is a crucial technological challenge. Existing cooling solutions for magnetic bearings mostly rely on external cooling systems, but these solutions typically suffer from complex structures, low cooling efficiency, and difficulty adapting to high-load environments. Utility Model Content

[0004] In response to the shortcomings of existing technologies, the inventors have developed a magnetic levitation compressor bearing refrigeration device through long-term practical research. This device solves the temperature rise problem faced by magnetic levitation bearings during operation, thereby improving the overall performance, stability and service life of the equipment. It has high practical value and market prospects.

[0005] This utility model discloses a magnetic levitation compressor bearing refrigeration device, which is installed in conjunction with a compressor equipped with a magnetic levitation bearing. It includes an assembly cover, a radiator, a circulation pump, and a positioning component. The assembly cover is fixedly installed on the outer wall of the compressor housing, the circulation pump is fixedly installed in the assembly cover, and the radiator is fixedly installed on the outside of the assembly cover and connected to the circulation pump.

[0006] The positioning components are fixedly connected to both ends of the stationary component of the magnetic levitation bearing. The positioning components are fixedly installed inside the housing. The follower component of the magnetic levitation bearing is fixedly installed around the rotor component of the compressor. The magnetic levitation bearing, the positioning components, and the rotor component form a refrigeration cavity.

[0007] The positioning assembly is assembled around the rotor component. The positioning assembly includes an outer ring seat and an inner ring seat that are concentrically arranged and sealed together. The inner wall of the outer ring seat and the outer wall of the inner ring seat are respectively provided with an outer ring groove and an inner ring groove. The outer ring groove and the inner ring groove are combined to form an annular passage. The outer ring seat and the inner ring seat are fixedly installed inside the housing. The inner ring seat is provided with radial passages distributed in an annular array. The radial passages are in communication with the annular passage and the cooling cavity. The outer ring seat is connected to a connecting pipe that is in communication with the annular passage. The connecting pipes arranged at both ends of the magnetic levitation bearing are respectively connected to the circulating pump and the radiator.

[0008] Furthermore, the outer edge of the assembly cover is fixedly connected to a connecting pad that nests and fits into the outer wall of the housing. The connecting pad is detachably fixed to the housing. The root of the radiator is fixedly connected to a connecting wing plate, which is detachably fixed to the assembly cover. The exterior of the radiator is provided with evenly arranged heat dissipation fins.

[0009] Furthermore, the connecting pipe extends to the outside of the housing and is arranged in the assembly cover. The inlet end of the radiator is connected to the outlet end of the circulation pump through a first connecting pipe. The outlet end of the radiator is connected to the corresponding connecting pipe through a second connecting pipe. The inlet end of the circulation pump is connected to the corresponding connecting pipe through a third connecting pipe.

[0010] Furthermore, assembly disc A and assembly disc B are respectively fixed to the outer edges of the outer ring seat and the inner ring seat. Assembly disc A and assembly disc B are arranged in close contact and fixedly installed inside the housing. An outer recess is opened at the inner end of the outer ring seat. A positioning disc is fixed to the outer edge of the end of the stationary component. The positioning disc is nested in the outer recess and fixedly combined with the outer ring seat and the inner ring seat.

[0011] Furthermore, the rotor component is sealed to the housing via a sealing assembly, the fixed part of the sealing assembly is fixedly installed on the housing, and the movable part of the sealing assembly is fixedly installed on the rotor component.

[0012] The beneficial effects of this utility model are:

[0013] 1. Effectively reduces the temperature of magnetic levitation bearings: By combining components such as the mounting cover, radiator, and circulating pump, a highly efficient cooling system is formed, which can continuously and effectively reduce the temperature of the magnetic levitation bearings. The evenly arranged heat dissipation fins of the radiator greatly increase the contact area with the external environment, improve heat exchange efficiency, and ensure stable operation of the bearing under high loads.

[0014] 2. Reduced mechanical friction and energy loss: Magnetic levitation bearings suspend rotor components using electromagnetic force, greatly reducing mechanical friction. Temperature control prevents overheating that could degrade magnetic levitation performance, thus effectively reducing energy loss and improving overall system efficiency.

[0015] 3. Improved bearing life: Continuous temperature control not only helps improve equipment performance but also significantly extends the lifespan of magnetic levitation bearings. Because temperature fluctuations are controlled, thermal expansion and wear of the bearings are reduced, avoiding damage and performance degradation caused by overheating.

[0016] 4. Compact structure and high maintainability: The assembly cover, radiator, circulating pump, and other components in this design are all detachable, facilitating equipment maintenance and replacement. Furthermore, the use of bolts to securely fasten each component ensures long-term reliable system operation.

[0017] 5. Wide range of applications: This refrigeration equipment is not only suitable for compressors, but can also be widely used in other high-precision mechanical equipment that requires magnetic levitation bearings, such as centrifuges and blowers. This makes the technical solution highly adaptable and valuable for promotion in multiple industries.

[0018] 6. Enhance the reliability and stability of the overall system: Through precise positioning and fixing design of the outer ring seat, inner ring seat, rotor components, etc., the stable operation of the magnetic levitation bearing is ensured, avoiding failures caused by inaccurate positioning, and further improving the working stability of the compressor and other equipment.

[0019] In summary, this solution, through its innovative design and efficient cooling mechanism, solves the temperature rise problem faced by magnetic levitation bearings during operation, thereby improving the overall performance, stability, and service life of the equipment. It has high practical value and market prospects. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model installed in a screw compressor.

[0021] Figure 2 This is a schematic diagram of the structure of this utility model combined with a compressor.

[0022] Figure 3 yes Figure 2 A structural diagram from another perspective.

[0023] Figure 4 This is a structural diagram of the assembly of the cover, radiator, and circulating pump.

[0024] Figure 5 This is a schematic diagram of the structure of a magnetic levitation bearing.

[0025] Figure 6 This is a schematic diagram of the structure of the outer ring seat combined with the radiator and circulating pump.

[0026] Figure 7 This is a structural diagram of the main shaft of the rotor assembly and the components mounted on it.

[0027] Figure 8 This is a structural diagram of the combination of positioning components and stationary parts.

[0028] Figure 9 This is a structural diagram of the outer ring seat and the inner ring seat in their disassembled state.

[0029] In the attached image:

[0030] 1-Magnetic levitation bearing, 11-Stationary component, 111-Positioning plate, 112-Radial adjustment part, 113-Axial adjustment part, 12-Follower component, 121-Radial positioning part, 122-Axial positioning part, 123-Sleeve A, 124-Limiting ring A, 21-Housing, 22-Rotor component, 221-Main shaft, 222-Driven shaft, 223-Reversing gear, 3-Assembly cover, 31-Connecting pad, 4-Radiator, 41-Connecting wing plate, 42-Heat dissipation fins, 43-No. 1 connecting pipe, 44-No. 2 connecting pipe, 5-Circulating pump, 51-No. 3 connecting pipe 6-Positioning assembly, 61-Outer ring seat, 611-Outer ring groove, 612-Connecting pipe, 613-Assembly plate A, 614-Outer recessed groove, 62-Inner ring seat, 621-Inner ring groove, 622-Radial passage, 623-Assembly plate B, 624-Inner recessed groove, 71-Refrigeration cavity, 72-Annular passage, 8-Sealing assembly, 81-Fixing part, 82-Moving part, 83-Shaft sleeve B, 84-Limiting ring B, 91-Sensor assembly, 911-Inner ring structure, 912-Outer ring structure, 92-Protective bearing, 921-Outer ring, 922-Inner ring. Detailed Implementation

[0031] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0032] See Figure 1-9 A magnetic levitation compressor bearing refrigeration device is provided, which is installed in conjunction with a compressor equipped with a magnetic levitation bearing 1. The device includes an assembly cover 3, a radiator 4, a circulation pump 5, and a positioning assembly 6. The assembly cover 3 is fixedly installed on the outer wall of the compressor housing 21, the circulation pump 5 is fixedly installed inside the assembly cover 3, and the radiator 4 is fixedly installed on the outside of the assembly cover 3 and connected to the circulation pump 5.

[0033] The stationary part 11 of the magnetic levitation bearing 1 is fixedly connected to both ends of the positioning component 6. The positioning component 6 is fixedly installed inside the housing 21. The follower part 12 of the magnetic levitation bearing 1 is fixedly installed to the periphery of the rotor part 22 of the compressor. The magnetic levitation bearing 1, the positioning component 6, and the rotor part 22 form a refrigeration cavity 71.

[0034] The positioning assembly 6 is assembled around the rotor component 22. The positioning assembly 6 includes an outer ring seat 61 and an inner ring seat 62 that are concentrically arranged and sealed together. The inner wall of the outer ring seat 61 and the outer wall of the inner ring seat 62 are respectively provided with an outer ring groove 611 and an inner ring groove 621, which together form an annular passage 72. The outer ring seat 61 and the inner ring seat 62 are fixedly installed inside the housing 21. The inner ring seat 62 is provided with radial passages 622 arranged in an annular array, which are connected to the annular passage 72 and the cooling cavity 71. A connecting pipe 612 connected to the outer ring seat 61 is connected to the annular passage 72. The connecting pipes 612 arranged at both ends of the magnetic levitation bearing 1 are respectively connected to the circulating pump 5 and the radiator 4.

[0035] The stationary component 11 of the magnetic levitation bearing 1 is fixedly connected to the housing 21 through the positioning components 6 at both ends to ensure that it is always in a stationary state. The follower component 12 is fixedly combined with the rotor component 22. The stationary component 11 can provide radial and axial forces to the follower component 12 to ensure that the rotor component 22 and the follower component 12 are always in a suspended operating state, thereby reducing the mechanical friction of the rotor component 22 during operation and effectively reducing its energy loss.

[0036] The radiator 4 and the cooling cavity 71 form a closed circulation path, which is filled with heat exchange medium for cooling the magnetic levitation bearing 1. The heat exchange medium is pressurized by the circulation pump 5 to circulate and carry away heat in the cooling cavity 71. The heat exchange medium temperature is reduced by the heat dissipation of the radiator 4 and then continues to be input into the cooling cavity 71. This process is repeated to achieve continuous cooling of the magnetic levitation bearing 1.

[0037] The refrigeration equipment provided in this application can be used not only in compressors, but also in other high-precision mechanical equipment with a rotating shaft structure to refrigerate the magnetic levitation bearing 1 matched with the rotating shaft, such as blowers and centrifuges.

[0038] When the compressor is used in the refrigeration field, such as in air conditioners, refrigerators, and aerospace applications, the equipment can be used without the circulation pump 5 and radiator 4. The connecting pipe 612 on the outer ring seat 61 can be directly connected to the refrigeration circuit where the compressor is located, and the heat exchange medium can be directly cooled and then fed into the refrigeration passage 71 to directly complete the refrigeration treatment of the magnetic levitation bearing 1.

[0039] To ensure that the assembly cover 3 and radiator 4 provided in this application can be stably installed outside the compressor housing 21 and to ensure the heat dissipation effect on the heat exchange medium, the following technical solution is provided.

[0040] The outer edge of the assembly cover 3 is fixedly connected to a connecting pad 31 that nests and matches the outer wall of the housing 21. The connecting pad 31 is fixedly installed on the housing 21 in a detachable manner. The root of the radiator 4 is fixedly connected to a connecting wing plate 41. The connecting wing plate 41 is fixedly installed on the assembly cover 3 in a detachable manner. The exterior of the radiator 4 is provided with evenly arranged heat dissipation fins 42.

[0041] The connecting pad 31, connecting wing plate 41 and circulating pump 5 are all installed by bolt fixing. The setting of heat dissipation fins 42 can increase the contact area between the heat sink 4 and the external environment, thereby improving the cooling efficiency of the heat exchange medium and ensuring efficient cooling of the magnetic levitation bearing 1.

[0042] To ensure that the connecting pipe 612 on the outer ring seat 61 can be connected to the main refrigeration circuit containing the circulating pump 5, radiator 4, or compressor, the following technical solution is provided.

[0043] The connecting pipe 612 extends to the outside of the housing 21 and is arranged in the assembly cover 3. The inlet end of the radiator 4 is connected to the outlet end of the circulating pump 5 through the first connecting pipe 43. The outlet end of the radiator 4 is connected to the corresponding connecting pipe 612 through the second connecting pipe 44. The inlet end of the circulating pump 5 is connected to the corresponding connecting pipe 612 through the third connecting pipe 51.

[0044] By setting up No. 1 pipe 43, No. 2 pipe 44, and No. 3 pipe 51, the radiator 4, connecting pipe 612, annular passage 72, radial passage 622, and refrigeration passage 71 can form a closed passage, thereby realizing the continuous circulation of the heat exchange medium.

[0045] To ensure that the outer ring seat 61 and the inner ring seat 62 can be stably installed inside the housing 21, and to ensure that the stationary component 11 of the magnetic levitation bearing 1 can be stably installed on the positioning components 6 at both ends, the following technical solution is provided.

[0046] Assembly plates A613 and B623 are respectively fixed to the outer edges of the outer ring seat 61 and the inner ring seat 62. Assembly plates A613 and B623 are arranged in close contact and fixedly installed inside the housing 21. An outer recess 614 is opened on the inner end of the outer ring seat 61, and a positioning plate 111 is fixed to the outer edge of the end of the stationary component 11. The positioning plate 111 is nested in the outer recess 614 and fixedly combined with the outer ring seat 61 and the inner ring seat 62.

[0047] Assembly plates A613 and B623 are fixed to the housing 21 by bolts, while the positioning plate 111 of the stationary component 11 is fixed to the outer ring seat 61 by bolts, thereby realizing the fixed combination of the stationary component 11 and the positioning assembly 6. The cooperation between the outer recess 614 and the positioning plate 111 enables the precise installation of the stationary component 11.

[0048] The stationary component 11 includes a radial adjustment section 112 located in the middle and axial adjustment sections 113 located on both sides of the radial adjustment section 112. Each adjustment section is equipped with an electromagnet that is evenly arranged. The magnetic force of each electromagnet is controlled by the magnitude of the input current. Correspondingly, the follower component 12 is also provided with a radial positioning section 121 arranged opposite to the radial adjustment section 112 and axial positioning sections 122 located on both sides of the radial positioning section 121. The axial positioning sections 122 are arranged inside the corresponding axial adjustment sections 113.

[0049] The follower component 12 is assembled onto the rotor component 22 via the bushing A123 and positioned by the limiting ring A124. The bushing A123 is interference-fitted with both the follower component 12 and the rotor component 22 to ensure that the follower component 12 always rotates synchronously with the rotor component 22, while the limiting ring A124 can further effectively limit the movement of the follower component 12.

[0050] To ensure the sealing effect at the connection between the rotor component 22 and the housing 21, and to prevent leakage of the transmitted fluid or the heat exchange medium from the gap between the rotor component 22 and the housing 21, the following technical solution is provided.

[0051] The rotor component 22 is sealed to the housing 21 via the sealing assembly 8. The fixed part 81 of the sealing assembly 8 is fixedly installed on the housing 21, and the movable part 82 of the sealing assembly 8 is fixedly installed on the rotor component 22.

[0052] The fixed part 81 of the sealing assembly 8 is fixed to the housing 21 by bolts, while the movable part 82 is assembled to the rotor assembly 22 by interference fit. For a screw compressor, the rotor assembly 22 includes a main shaft 221 and a driven shaft 222, on which the anode rotor and the cathode rotor are respectively mounted. The two are coordinated by the reversing gear 223 to achieve synchronous reverse operation and pressurize the fluid.

[0053] The driven shaft 222 is located inside the housing 21, so both ends of it can be sealed to the housing 21 by a set of sealing components 8. As for the main shaft 221, since one end needs to extend to the outside of the housing 21 and connect with the output shaft of the motor, two sets of sealing components 8 need to be installed on this side of the main shaft 221 for joint sealing.

[0054] For the additional sealing assembly 8 added to the spindle 221, its fixed part 81 is also fixed to the housing 21, and the inner side of the movable part 82 is press-fitted with a bushing B83, and the bushing B83 is fitted onto the spindle 221 and maintains a press-fit with the spindle 221. A limiting ring B84 is fitted around the bushing B83 and fitted around the spindle 221 to further limit the bushing B83.

[0055] A sensor assembly 91 and a protective bearing 92 are also provided on the magnetic levitation bearing 1. The sensor assembly 91 includes an outer ring structure 912 with an integrated detection probe fixed to the inner ring seat 62 and an inner ring structure 911 fixed to the rotor component 22. An inner groove 624 is formed in the inner ring seat 62. The outer ring structure 912 is fixedly installed in the inner groove 624, while the inner ring structure 911 is assembled to the bushing B83 by an interference fit, or directly assembled to the rotor component 22. The detection probe can detect the distance between the inner ring structure 911 and the outer ring structure 912, thereby adjusting the magnetic force of the electromagnet.

[0056] The inner ring 922 of the protective bearing 92 is fixedly mounted to the rotor assembly 22, while the outer ring 921 is fixedly mounted to the inner groove 624 of another set of inner ring seats 62. The distance between the two is less than the distance between the stationary component 11 and the follower component 12. When the compressor stops, the magnetic force of the electromagnets in the radial adjustment part 112 and the axial adjustment part 113 disappears. At this time, the outer ring 921 in the protective bearing 92 can stably support the inner ring 922 on the rotor assembly 22, playing a temporary support role.

[0057] The above description is merely an embodiment of this application and does not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A magnetic levitation compressor bearing refrigeration apparatus, characterized by, The compressor with magnetic levitation bearing (1) is installed together with a mounting cover (3), a radiator (4), a circulation pump (5), and a positioning component (6). The mounting cover (3) is fixedly installed on the outer wall of the compressor housing (21). The circulation pump (5) is fixedly installed in the mounting cover (3). The radiator (4) is fixedly installed on the outside of the mounting cover (3) and connected to the circulation pump (5). The positioning component (6) is fixedly connected to both ends of the stationary part (11) of the magnetic levitation bearing (1). The positioning component (6) is fixedly installed inside the housing (21). The follower part (12) of the magnetic levitation bearing (1) is fixedly installed to the periphery of the rotor part (22) of the compressor. The magnetic levitation bearing (1), the positioning component (6), and the rotor part (22) form a refrigeration cavity (71). The positioning component (6) is assembled around the rotor component (22). The positioning component (6) includes an outer ring seat (61) and an inner ring seat (62) that are concentrically arranged and sealed together. The inner wall of the outer ring seat (61) and the outer wall of the inner ring seat (62) are respectively provided with an outer ring groove (611) and an inner ring groove (621). The outer ring groove (611) and the inner ring groove (621) are combined to form an annular passage (72). The outer ring seat (61) and the inner ring seat (62) are fixed together. The inner ring seat (62) is fixedly installed inside the housing (21). A radial passage (622) is provided on the inner ring seat (62) in a ring array. The radial passage (622) is connected to the ring passage (72) and the cooling cavity (71). A connecting pipe (612) is connected to the outer ring seat (61) and is connected to the ring passage (72). The connecting pipes (612) arranged at both ends of the magnetic levitation bearing (1) are connected to the circulating pump (5) and the radiator (4) respectively.

2. The magnetic levitation compressor bearing refrigeration appliance of claim 1, wherein, The outer edge of the assembly cover (3) is fixedly connected to a connecting pad (31) that nests and matches the outer wall of the housing (21). The connecting pad (31) is fixedly installed on the housing (21) in a detachable manner. The root of the radiator (4) is fixedly connected to a connecting wing plate (41). The connecting wing plate (41) is fixedly installed on the assembly cover (3) in a detachable manner. The radiator (4) is provided with evenly arranged heat dissipation fins (42) on its exterior.

3. The magnetic levitation compressor bearing refrigeration apparatus of claim 1, wherein, The connecting pipe (612) extends to the outside of the housing (21) and is arranged in the assembly cover (3). The inlet end of the radiator (4) is connected to the outlet end of the circulating pump (5) through the first connecting pipe (43). The outlet end of the radiator (4) is connected to the corresponding connecting pipe (612) through the second connecting pipe (44). The inlet end of the circulating pump (5) is connected to the corresponding connecting pipe (612) through the third connecting pipe (51).

4. The magnetic levitation compressor bearing refrigeration apparatus of claim 1, wherein, The outer ring seat (61) and inner ring seat (62) are respectively fixedly connected to the outer edges of the assembly plate A (613) and assembly plate B (623). The assembly plate A (613) and assembly plate B (623) are arranged in close contact and fixedly installed inside the housing (21). The inner end of the outer ring seat (61) is provided with an outer recess (614). The outer edge of the end of the stationary component (11) is fixedly connected to a positioning plate (111). The positioning plate (111) is nested in the outer recess (614) and fixedly combined with the outer ring seat (61) and inner ring seat (62).

5. The magnetic levitation compressor bearing refrigeration appliance of claim 1, wherein, The rotor component (22) is sealed to the housing (21) by a sealing assembly (8). The fixing part (81) of the sealing assembly (8) is fixedly installed on the housing (21), and the movable part (82) of the sealing assembly (8) is fixedly installed on the rotor component (22).

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