A type of artificial dual-impeller magnetic levitation blood pump for external use

Abstract

This invention belongs to the field of medical device technology, and particularly relates to an external artificial dual-impeller magnetic levitation blood pump, comprising: a lower blood pump structure and an upper blood pump structure located above the lower blood pump structure. The upper and lower blood pump structures are fixedly connected by a turbine housing. Each of the upper and lower blood pump structures has an axial magnetic bearing structure and a radial magnetic bearing structure on its inner side, respectively. A sealed rotor structure is provided between the two sets of axial and radial magnetic bearing structures. A magnetic coupling structure is provided inside the lower blood pump structure, and the magnetic coupling structure is connected to the sealed rotor structure by magnetic force transmission. Utilizing these structures, an external artificial dual-impeller magnetic levitation blood pump is achieved that effectively prevents blood from contacting other structures, thereby significantly improving the stability and reliability of structural operation.

Description

Technical Field

[0001] This invention belongs to the field of medical device technology, and in particular relates to an external artificial dual-impeller magnetic levitation blood pump. Background Technology

[0002] An artificial extracorporeal blood pump is a small, variable-speed, variable-volume pump used to replace the heart's function. Artificial blood pumps can be used to save the lives of critically ill patients. With an increasing number of people requiring blood draws and transfusions due to conditions such as high blood sugar, high cholesterol, and high blood pressure, extracorporeal blood pumps can change the speed of blood extraction and delivery, saving time and providing crucial treatment time for critically ill patients, thus improving the success rate of treatment. Currently, impeller-type blood pumps have become the mainstream product in clinical applications. Existing blood pumps mainly use three impeller support methods: mechanical bearing, hydraulic suspension, and magnetic levitation. Mechanical bearing blood pumps have a short mechanical lifespan and a relatively high complication rate. While the second and third types of suspension bearing structures can overcome the short mechanical lifespan of blood pumps, their impact resistance and reliability are significantly insufficient. To solve these problems, this invention proposes a dual-impeller magnetic levitation bearing blood pump, which improves the stability and reliability of the blood pump, generates a larger flow rate under the same work, and greatly improves work efficiency. Summary of the Invention

[0003] The purpose of this invention is to provide an external artificial dual-impeller magnetic levitation blood pump to solve the above-mentioned problems, reduce the contact between the bearing and the blood, and improve the stability and reliability of operation.

[0004] To achieve the above objectives, the present invention provides the following solution:

[0005] An extracorporeal artificial dual-impeller magnetic levitation blood pump includes: a lower blood pump structure and an upper blood pump structure located above the lower blood pump structure. The upper blood pump structure and the lower blood pump structure are fixedly connected by a turbine housing. The inner sides of the upper blood pump structure and the lower blood pump structure are respectively provided with an axial magnetic bearing structure and a radial magnetic bearing structure. A sealed rotor structure is provided between the two sets of axial magnetic bearing structures and radial magnetic bearing structures. A magnetic coupling structure is provided inside the lower blood pump structure. The magnetic coupling structure is connected to the sealed rotor structure by magnetic force transmission.

[0006] Preferably, the upper blood pump structure includes an upper blood pump housing, an upper axial magnetic bearing stator fixedly connected to the inner side of the upper blood pump housing, the axial magnetic bearing structure fixedly connected to the inner side of the upper axial magnetic bearing stator, an upper radial magnetic bearing housing fixedly connected to the bottom end of the upper blood pump housing, the radial magnetic bearing structure fixedly connected to the inner side of the upper radial magnetic bearing housing, and the bottom end of the upper radial magnetic bearing housing fixedly connected to the turbine housing.

[0007] Preferably, the lower blood pump structure includes a lower blood pump housing, a lower axial magnetic bearing stator fixedly connected to the inner side of the lower blood pump housing, a motor mounting bracket fixedly connected to the bottom end of the lower axial magnetic bearing stator, the axial magnetic bearing structure fixedly connected to the inner side of the lower axial magnetic bearing stator, a lower radial magnetic bearing housing fixedly connected to the top end of the lower blood pump housing, the radial magnetic bearing structure fixedly connected to the inner side of the lower radial magnetic bearing housing, and the top end of the lower radial magnetic bearing housing fixedly connected to the turbine housing.

[0008] Preferably, the sealed rotor structure includes a rotor housing with a concave portion in the middle. Turbine structures are symmetrically rotatably connected to the upper and lower ends of the inner side of the rotor housing. Each turbine structure includes a rotor shaft with a threaded ring, a stack, and a rotor spacer ring fitted around its periphery. Turbines are fixedly connected to the ends of the two rotor shafts that are close to each other. The two turbines are fixedly connected by double-ended studs. A suction tube is fixedly connected to the bottom end of the concave portion, and an outlet tube is fixedly connected to the rotor housing around the concave portion.

[0009] Preferably, the radial magnetic bearing structure includes a radial magnetic bearing stator, a spacer ring is fixedly connected to one side of the radial magnetic bearing stator, and a plurality of radial magnetic bearing coils arranged at equal intervals are fixedly connected to the inner side of the radial magnetic bearing stator.

[0010] Preferably, the magnetic coupling structure includes a motor, which is fixedly connected between the motor mounting bracket and the lower blood pump housing. The output shaft of the motor is connected to a motor shaft. The end of the motor shaft away from the motor is provided with a magnetic coupling active structure. The inner side of the sealed rotor structure is provided with a magnetic coupling driven structure. The magnetic coupling driven structure and the magnetic coupling active structure are magnetically driven.

[0011] Preferably, the active structure of the magnetic coupling includes a motor shaft connecting plate, which is fixedly connected to the motor shaft. An active magnetic guide ring housing is axially connected to one side of the motor shaft connecting plate. A rotor magnetic guide ring and a first permanent magnet are fixedly connected to the inner side of the active magnetic guide ring housing away from the motor shaft connecting plate. The driven structure of the magnetic coupling includes a driven magnetic guide ring housing, which is axially connected to the bottom end of the rotor shaft. A magnetic guide ring and a second permanent magnet are fixedly connected to the inner side of the driven magnetic guide ring housing away from the rotor shaft. The first permanent magnet and the second permanent magnet correspond to each other.

[0012] Preferably, radial sensor structures are respectively fitted onto the upper and lower ends of the rotor housing. The radial sensor structure includes a radial sensor bracket, which is located inside the upper radial magnetic bearing housing. A radial sensor is provided at one end of the radial sensor bracket near the rotor housing.

[0013] Preferably, the rotor housing has an axial sensor structure at its top, the axial sensor structure including an axial sensor bracket, the axial sensor bracket being fixedly connected to the bottom end of the upper axial magnetic bearing stator, and the bottom end of the axial sensor bracket having an axial sensor.

[0014] Compared with the prior art, the present invention has the following advantages and technical effects:

[0015] By incorporating axial and radial magnetic bearing structures on the upper and lower blood pump structures, the internal structure of the sealed rotor can rotate stably, reducing friction with the sidewalls. Magnetic levitation further reduces frictional losses and heat generation. Simultaneously, the magnetic coupling structure drives the sealed rotor to aspirate blood. Since the sealed rotor is not directly connected to the shaft, blood will not contaminate the shaft or other structural components. These structures create an external artificial dual-impeller magnetic levitation blood pump that effectively prevents blood from contacting other structures, significantly improving operational stability and reliability. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly described below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a front cross-sectional view of the present invention;

[0018] Figure 2 This is a front view of the present invention;

[0019] Figure 3 This is a partial internal structure diagram of the present invention;

[0020] Figure 4 This is a schematic diagram of the internal structure after the rotor housing has been removed.

[0021] Figure 5 This is a partial structural diagram of the lower blood pump structure;

[0022] Figure 6 This is a structural diagram of a magnetic coupling.

[0023] Figure 7 This is a diagram illustrating the use of the present invention.

[0024] Reference numerals: 1. Upper blood pump structure; 2. Lower blood pump structure; 3. Turbine housing; 4. Sealed rotor structure; 5. Outlet blood vessel; 6. Aspiration blood vessel; 7. Axial magnetic bearing structure; 8. Radial magnetic bearing structure; 9. Magnetic coupling structure; 10. Axial sensor structure; 11. Radial sensor structure; 12. Blood pump device; 13. Support frame; 14. Low-temperature oxygenation equipment; 15. Delivery blood vessel; 16. Human body; 17. Bed body; 101. Upper blood pump housing; 102. Upper axial magnetic bearing stator; 103. Upper radial magnetic bearing housing; 201. Lower blood pump housing; 202. Lower axial magnetic bearing stator; 203. Motor mounting bracket; 204. Lower radial magnetic bearing housing; 401. Rotor shaft; 402. 403. Turbine; 404. Threaded ring; 405. Laminated ring; 406. Rotor housing; 801. Radial magnetic bearing stator; 802. Spacer ring; 803. Radial magnetic bearing coil; 901. Motor; 902. Motor shaft; 903. Magnetic coupling active structure; 904. Magnetic coupling driven structure; 1001. Axial sensor bracket; 1002. Axial sensor; 1101. Radial sensor bracket; 1102. Radial sensor; 9031. First permanent magnet; 9032. Motor shaft connecting disc; 9033. Active magnetic guide ring housing; 9034. Rotor magnetic guide ring; 9041. Driven magnetic guide ring housing; 9042. Magnetic guide ring; 9043. Second permanent magnet. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0027] Reference Figure 1-7 As shown, the present invention provides an extracorporeal artificial dual-impeller magnetic levitation blood pump, comprising: a lower blood pump structure 2 and an upper blood pump structure 1 located above the lower blood pump structure 2. The upper blood pump structure 1 and the lower blood pump structure 2 are fixedly connected by a turbine housing 3. The inner sides of the upper blood pump structure 1 and the lower blood pump structure 2 are respectively provided with an axial magnetic bearing structure 7 and a radial magnetic bearing structure 8. A sealed rotor structure 4 is provided between the two sets of axial magnetic bearing structures 7 and radial magnetic bearing structures 8. A magnetic coupling structure 9 is provided inside the lower blood pump structure 2. The magnetic coupling structure 9 is connected to the sealed rotor structure 4 in a transmission manner.

[0028] Specifically, the axial magnetic bearing structure 7 is preferably an axial magnetic bearing coil, which can provide axial support.

[0029] By installing axial magnetic bearing structures 7 and radial magnetic bearing structures 8 on the upper blood pump structure 1 and lower blood pump structure 2, the internal structure of the sealed rotor structure 4 can rotate stably, reducing friction with the sidewalls. Magnetic levitation reduces friction loss and heat generation. Simultaneously, the magnetic coupling structure 9 drives the sealed rotor structure 4 to rotate, enabling blood suction. Since the sealed rotor structure 4 is not directly connected to the shaft, blood will not contaminate the shaft or other parts of the structure. These structures create an external artificial dual-impeller magnetic levitation blood pump that effectively prevents blood from contacting other structures, thereby significantly improving the stability and reliability of structural operation.

[0030] In practical use, the motor 901 in the magnetic coupling structure 9 moves, causing the first permanent magnet 9031 in the magnetic coupling drive structure 903 to rotate. The first permanent magnet 9031 further drives the rotor shaft 401 inside the rotor housing 406 to rotate via the second permanent magnet 9043. The turbine 402 between the two rotor shafts 401 rotates, and the blood moves towards the periphery of the concave part due to centrifugal force, thus creating the effect of blood extraction. The turbine housing 3 is designed to protect the internal structure and prevent personnel from putting their hands inside.

[0031] The scheme is further optimized. The upper blood pump structure 1 includes an upper blood pump housing 101. An upper axial magnetic bearing stator 102 is fixedly connected to the inner side of the upper blood pump housing 101. An axial magnetic bearing structure 7 is fixedly connected to the inner side of the upper axial magnetic bearing stator 102. An upper radial magnetic bearing housing 103 is fixedly connected to the bottom end of the upper blood pump housing 101. A radial magnetic bearing structure 8 is fixedly connected to the inner side of the upper radial magnetic bearing housing 103. The bottom end of the upper radial magnetic bearing housing 103 is fixedly connected to the turbine housing 3.

[0032] The axial magnetic bearing structure 7 located inside the upper axial magnetic bearing stator 102 can generate axial thrust on the rotor shaft 401 inside the rotor housing 406, while the radial magnetic bearing structure 8 located inside the upper radial magnetic bearing housing 103 can generate radial thrust on the rotor shaft 401 inside the rotor housing 406, reducing the friction of the rotor shaft 401 inside the rotor housing 406 and ensuring its rotation speed and efficiency.

[0033] Further optimizing the scheme, the lower blood pump structure 2 includes a lower blood pump housing 201, a lower axial magnetic bearing stator 202 fixedly connected to the inner side of the lower blood pump housing 201, a motor fixing bracket 203 fixedly connected to the bottom end of the lower axial magnetic bearing stator 202, an axial magnetic bearing structure 7 fixedly connected to the inner side of the lower axial magnetic bearing stator 202, a lower radial magnetic bearing housing 204 fixedly connected to the top end of the lower blood pump housing 201, a radial magnetic bearing structure 8 fixedly connected to the inner side of the lower radial magnetic bearing housing 204, and a turbine housing 3 fixedly connected to the top end of the lower radial magnetic bearing housing 204.

[0034] The structure in the lower blood pump structure 2 has the same function and effect as the upper blood pump structure 1. It can also ensure the rotation speed and efficiency of the rotor shaft 401 inside the rotor housing 406 and reduce its friction.

[0035] Further optimizing the design, the sealed rotor structure 4 includes a rotor housing 406, with a recessed portion in the center of the rotor housing 406. Turbine structures are symmetrically rotatably connected to the upper and lower ends of the inner side of the rotor housing 406. The turbine structures include a rotor shaft 401, with a threaded ring 403, a laminate 404, and a rotor spacer 405 fitted around the circumference of the rotor shaft 401.

[0036] Among them, the threaded ring 403 can play a fastening role, the stacked layer 404 reduces eddy current loss and improves pumping efficiency, and the rotor spacer ring 405 is preferably made of aluminum to isolate the magnetic field.

[0037] Two rotor shafts 401 are fixedly connected to turbines 402 at their close ends. The two turbines 402 are fixedly connected by double-ended studs. A suction tube 6 is fixedly connected to the bottom of the concave part. An outlet tube 5 is fixedly connected to the rotor housing 406 on the periphery of the concave part.

[0038] The end of the outlet blood vessel 5 near the rotor housing 406 is connected to the periphery of the concave portion on the rotor housing 406 via a three-way structure. When the turbine 402 rotates, the blood is subjected to centrifugal force and moves towards the periphery of the concave portion, thus entering the outlet blood vessel 5 and being drawn away. The suction blood vessel 6 is located in the center of the concave portion. When the turbine 402 rotates, the blood flowing into it is continuously drawn away, thereby continuously drawing blood from the human body 16 on the bed 17.

[0039] Further optimization of the scheme: the radial magnetic bearing structure 8 includes a radial magnetic bearing stator 801, a spacer 802 fixedly connected to one side of the radial magnetic bearing stator 801, and several radial magnetic bearing coils 803 arranged at equal intervals fixedly connected to the inner side of the radial magnetic bearing stator 801. The function of the spacer 802 is to isolate the radial magnetic bearing coils 803.

[0040] Further optimizing the scheme, the magnetic coupling structure 9 includes a motor 901, which is fixedly connected between the motor fixing bracket 203 and the lower blood pump housing 201. The output shaft of the motor 901 is connected to a motor shaft 902. The end of the motor shaft 902 away from the motor 901 is provided with a magnetic coupling active structure 903. The inner side of the sealed rotor structure 4 is provided with a magnetic coupling driven structure 904, and the magnetic coupling driven structure 904 and the magnetic coupling active structure 903 are magnetically driven.

[0041] The magnetic coupling active structure 903 further optimizes the design by including a motor shaft connecting plate 9032, which is fixedly connected to the motor shaft 902. An active magnetic ring housing 9033 is axially connected to one side of the motor shaft connecting plate 9032. A rotor magnetic ring 9034 and a first permanent magnet 9031 are fixedly connected to the inner side of the active magnetic ring housing 9033 away from the motor shaft connecting plate 9032. The magnetic coupling driven structure 904 includes a driven magnetic ring housing 9041, which is axially connected to the bottom end of the rotor shaft 401. A magnetic ring 9042 and a second permanent magnet 9043 are fixedly connected to the inner side of the driven magnetic ring housing 9041 away from the rotor shaft 401. The first permanent magnet 9031 and the second permanent magnet 9043 correspond to each other.

[0042] Specifically, the first permanent magnet 9031 and the second permanent magnet 9043 are each composed of four N-pole permanent magnets and four S-pole permanent magnets interleaved. When rotating, the rotation of the first permanent magnet 9031 can drive the second permanent magnet 9043 to rotate in the same direction, thereby driving the rotor shaft 401 to rotate. This structure ensures that the blood does not come into contact with the bearing structure and is completely sealed.

[0043] In a further optimized design, radial sensor structures 11 are respectively fitted onto the upper and lower ends of the rotor housing 406. The radial sensor structure 11 includes a radial sensor bracket 1101, which is located inside the upper radial magnetic bearing housing 103. A radial sensor 1102 is provided at one end of the radial sensor bracket 1101 near the rotor housing 406.

[0044] In a further optimized design, an axial sensor structure 10 is provided at the top of the rotor housing 406. The axial sensor structure 10 includes an axial sensor bracket 1001, which is fixedly connected to the bottom of the upper axial magnetic bearing stator 102. An axial sensor 1002 is provided at the bottom of the axial sensor bracket 1001.

[0045] By setting radial sensor 1102 and axial sensor 1002, the offset of rotor shaft 401 can be detected, and timely adjustments can be made to ensure the stable and safe operation of the device.

[0046] When using this device, first place the blood pump device 12 and the low-temperature oxygenation device 14 on the support frame 13, connect the blood pump device 12 to the human body 16, then connect the blood outlet device 5 to the low-temperature oxygenation device 14, and connect the blood delivery device 15 on the low-temperature oxygenation device 14 to the human body 16 on the bed 17, thus realizing a complete blood drawing process.

[0047] In this device, the axial magnetic bearing structure 7, the radial magnetic bearing coil 803, the motor 901, the radial sensor 1102, and the axial sensor 1002 are all electrically connected to an external power source. The radial sensor 1102 and the axial sensor 1002 are electrically connected to an external computer to display specific information to the user.

[0048] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0049] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A magnetic levitation blood pump for extracorporeal artificial use, characterized in that Include: Lower blood pump structure (2), upper blood pump structure (1) above the lower blood pump structure (2), the upper blood pump structure (1), lower blood pump structure (2) are fixedly connected between the turbine housing (3), the upper blood pump structure (1), lower blood pump structure (2) inside are respectively provided with axial magnetic bearing structure (7), radial magnetic bearing structure (8), two groups of axial magnetic bearing structure (7), radial magnetic bearing structure (8) between the sealing rotor structure (4) is equipped with, the lower blood pump structure (2) is equipped with magnetic coupling structure (9) inside, the magnetic coupling structure (9) and the sealing rotor structure (4) are connected through magnetic force transmission; The upper blood pump structure (1) includes an upper blood pump housing (101), the upper blood pump housing (101) is fixedly connected with an upper axial magnetic bearing stator (102) inside, the axial magnetic bearing structure (7) is fixedly connected with the upper axial magnetic bearing stator (102) inside, the upper blood pump housing (101) bottom end is fixedly connected with an upper radial magnetic bearing housing (103), the radial magnetic bearing structure (8) is fixedly connected with the upper radial magnetic bearing housing (103) inside, the upper radial magnetic bearing housing (103) bottom end is fixedly connected with the turbine housing (3); The lower blood pump structure (2) includes a lower blood pump housing (201), the lower blood pump housing (201) is fixedly connected with a lower axial magnetic bearing stator (202) inside, the lower axial magnetic bearing stator (202) bottom end is fixedly connected with a motor fixed support (203), the axial magnetic bearing structure (7) is fixedly connected with the lower axial magnetic bearing stator (202) inside, the lower blood pump housing (201) top end is fixedly connected with a lower radial magnetic bearing housing (204), the radial magnetic bearing structure (8) is fixedly connected with the lower radial magnetic bearing housing (204) inside, the lower radial magnetic bearing housing (204) top end is fixedly connected with the turbine housing (3); The sealing rotor structure (4) includes a rotor housing (406), the rotor housing (406) is provided with an inner recess in the middle, the rotor housing (406) is rotatably connected with a turbine structure at upper and lower ends inside, the turbine structure includes a rotor shaft (401), the rotor shaft (401) is sleeved with a threaded ring (403), a laminated layer (404) and a rotor spacer ring (405), both ends of the two rotor shafts (401) are fixedly connected with turbines (402), and the two turbines (402) are fixedly connected through a double-headed stud, the inner recess bottom end is fixedly connected with a blood extraction pipe (6), and the rotor housing (406) on the inner recess side is fixedly connected with a blood outlet pipe (5).

2. A magnetic blood pump according to claim 1, wherein The radial magnetic bearing structure (8) includes a radial magnetic bearing stator (801), the radial magnetic bearing stator (801) is fixedly connected with a spacer ring (802) on one side, and a plurality of radial magnetic bearing coils (803) are fixedly connected with the radial magnetic bearing stator (801) inside.

3. A magnetic levitation blood pump with artificial double impellers for extracorporeal use according to claim 1, characterized in that, The magnetic coupling structure (9) comprises a motor (901), the motor (901) is fixedly connected between the motor fixing support (203) and the lower blood pump shell (201), the output shaft of the motor (901) is connected with a motor rotating shaft (902), one end of the motor rotating shaft (902) away from the motor (901) is provided with a magnetic coupling driving structure (903), the inner side of the sealing rotor structure (4) is provided with a magnetic coupling driven structure (904), the magnetic coupling driven structure (904) and the magnetic coupling driving structure (903) are magnetically transmitted.

4. A magnetic blood pump according to claim 3, wherein the magnetic blood pump is a magnetic blood pump for extracorporeal use. The magnetic coupling driving structure (903) comprises a motor shaft connecting disc (9032), the motor shaft connecting disc (9032) is fixedly connected with the motor rotating shaft (902), one side of the motor shaft connecting disc (9032) is connected with a driving magnetic ring shell (9033), the inner side of one end of the driving magnetic ring shell (9033) away from the motor shaft connecting disc (9032) is fixedly connected with a rotor magnetic ring (9034) and a first permanent magnet (9031); the magnetic coupling driven structure (904) comprises a driven magnetic ring shell (9041), the driven magnetic ring shell (9041) is connected with the bottom end of the rotor shaft (401), the inner side of one end of the driven magnetic ring shell (9041) away from the rotor shaft (401) is fixedly connected with a magnetic ring (9042) and a second permanent magnet (9043), the first permanent magnet (9031) corresponds to the second permanent magnet (9043).

5. A magnetic levitation blood pump according to claim 1, wherein, The upper and lower ends of the rotor shell (406) are respectively sleeved with radial sensor structures (11), the radial sensor structure (11) comprises a radial sensor support (1101), the radial sensor support (1101) is located on the inner side of the upper radial magnetic bearing shell (103), one end of the radial sensor support (1101) close to the rotor shell (406) is provided with a radial sensor (1102).

6. A magnetic levitation blood pump according to claim 1, wherein, The top end of the rotor shell (406) is provided with an axial sensor structure (10), the axial sensor structure (10) comprises an axial sensor support (1001), the axial sensor support (1001) is fixedly connected to the bottom end of the upper axial magnetic bearing stator (102), the bottom end of the axial sensor support (1001) is provided with an axial sensor (1002).

Images