Non-metallic shielded electromagnetic bearing

Abstract

The utility model discloses a kind of nonmetallic shielded electromagnetic bearings, including flange seat, nonmetallic shielding assembly and sensor.The nonmetallic shielding assembly is composed of nonmetallic shielding end cap and nonmetallic shielding sleeve, and the center hole of nonmetallic shielding sleeve and flange seat forms annular cavity, for installing sensor, stator and coil.Nonmetallic material can avoid signal interference and eddy current loss, improve output efficiency, and adapt to high temperature, corrosive environment.Nonmetallic shielding sleeve and end cap are integrally formed or welded sealing, and flange seat end surface is provided with sealing ring to enhance leakproof performance.In preferred scheme, layered installation stator, inductive sensor and rotational speed sensor are arranged in annular cavity, and are fixed by grommet buffer.The utility model is simple in structure, strong in corrosion resistance, and is suitable for severe working conditions.

Description

Technical Field

[0001] This utility model relates to the field of electromagnetic bearing technology, and more specifically, to a non-metallic shielded electromagnetic bearing. Background Technology

[0002] Traditional electromagnetic bearings are commonly used in engineering equipment such as air compressors and blowers. Since they operate in air, they can be exposed to the air without special encapsulation design. However, in harsh environments such as corrosive or high-temperature conditions, a shielding structure is required to encapsulate the electromagnetic bearing. The shielding structures in these technologies primarily use metal materials. However, the addition of a metal shielding layer introduces eddy current losses at the shielding sleeve location, generating a significant amount of additional heat. Furthermore, the presence of the metal shielding structure weakens or even blocks the sensor signal, leading to electromagnetic bearing failure. This makes it impossible to integrate the sensor internally; it must be moved externally, resulting in a more complex structure and reduced safety.

[0003] For example, Chinese Patent Publication No. CN114576267A, published on June 3, 2022, discloses an invention entitled "Axial Electromagnetic Bearing". Although the invention has a slit that can effectively block eddy currents generated in the bearing stator and reduce stator heating, it inevitably weakens or even blocks the sensor signal because it uses a metal shielding structure. Utility Model Content

[0004] This invention overcomes the shortcomings of existing technologies where the presence of a metal shielding structure weakens or even blocks the sensor signal, leading to electromagnetic bearing failure. This prevents the sensor from being built-in and forces it to be moved outside the bearing, resulting in a more complex structure and lower safety. The invention provides a non-metallic shielded electromagnetic bearing that can reduce the impact of the encapsulation structure on the sensor's quality signal, improve the overall performance of the electromagnetic bearing, and reduce the complexity of the manufacturing process, thus saving production costs.

[0005] To solve the above-mentioned technical problems, this utility model adopts the following technical solution: a non-metallic shielded electromagnetic bearing, comprising: The flange seat has a central hole in its center; The non-metallic shielding assembly includes non-metallic shielding end caps disposed on both ends of the flange seat and a non-metallic shielding sleeve coaxially disposed with the central hole. The two ends of the non-metallic shielding sleeve are respectively connected to the two non-metallic shielding end caps; the non-metallic shielding sleeve and the side wall of the central hole cooperate to form an annular cavity. The sensor is located inside the annular cavity.

[0006] This application provides a non-metallic shielding sleeve inside the central hole of the flange seat. The non-metallic shielding sleeve and the inner wall of the central hole cooperate to form an annular cavity, which is used to house structures such as sensors, stators, and coils. Because the non-metallic shielding sleeve is made of non-metallic material, it can avoid weakening the sensor signal and reduce the impact on the sensor. At the same time, it also avoids the problem of eddy current loss and heat generation in metal shielding structures, thus improving the output efficiency of the electromagnetic bearing. In addition, since the non-metallic shielding sleeve and the non-metallic shielding end cap have anti-corrosion properties, this application can be used in high-temperature and corrosive environments.

[0007] Preferably, the non-metallic shielding sleeve and the non-metallic shielding end cap at one end are integrally formed.

[0008] In this embodiment, the non-metallic shielding sleeve and the non-metallic shielding end cap at one end are integrally injection molded. The structure is relatively simple and the cost is low, while also meeting the requirements of harsh environments such as water media and corrosion resistance, avoiding the complex process and high cost of metal encapsulation structures.

[0009] Preferably, the other end of the non-metallic shielding sleeve is connected to the non-metallic shielding end cap by welding.

[0010] In this embodiment, the non-metallic shielding sleeve and the non-metallic shielding end cap are welded together by laser welding, so that the two ends of the non-metallic shielding sleeve are sealed to the non-metallic shielding end cap, ensuring that a sealed structure is formed inside the annular cavity.

[0011] Preferably, mounting grooves are provided on both ends of the flange seat, and non-metallic shielding end caps are placed in the mounting grooves.

[0012] The non-metallic shielding cover fits into the mounting groove, facilitating the installation and positioning of the non-metallic shielding cover.

[0013] Preferably, end face screw holes are provided on both sides of the flange seat, and the end face screw holes are located in the circumferential direction of the central hole; the non-metallic shielding end cap is provided with end face through holes that mate with the end face screw holes.

[0014] During installation, align the end face through hole with the end face screw hole, then pass the bolt through the end face through hole and thread it into the end face screw hole to fix the non-metallic shielding end cover to the end face of the flange seat.

[0015] Preferably, a mounting ring seat is provided in the circumferential direction at one end of the annular cavity. A first inner ring, a second inner ring, and a third inner ring are stacked sequentially on the mounting ring seat. Several mounting bolts pass through the third inner ring, the second inner ring, and the first inner ring and are threadedly connected to the mounting ring seat.

[0016] The positions of the first, second, and third perforations correspond to each other. After the mounting bolts pass through the third, second, and first perforations in sequence, they are fixedly connected to the threaded holes of the ring seat, thereby fixing the three inner rings in the annular cavity.

[0017] Preferably, a plurality of first protrusions are provided in the circumferential direction of the inner sidewall of the first inner ring, a stator is fitted on the first protrusions, and a coil is wound on the stator.

[0018] The stator is fitted onto the first protrusion, which helps to fix the stator and improves the stability of the overall structure during operation.

[0019] Preferably, a number of second protrusions are provided in the circumferential direction of the inner sidewall of the second inner ring, and an inductive sensor is sleeved on the second protrusion.

[0020] The inductive sensor is mounted on the second protrusion, which serves to position the inductive sensor and improve the stability of the overall structure during operation.

[0021] Preferably, a number of third protrusions are provided in the circumferential direction of the inner wall of the third inner ring, and a speed sensor is sleeved on the third protrusion.

[0022] The speed sensor is mounted on the third protrusion, which plays a role in positioning the inductive sensor and improving the stability of the overall structure during operation.

[0023] Preferably, a first washer ring is provided between the first inner ring and the second inner ring, and a second washer ring is provided between the second inner ring and the third inner ring.

[0024] The first and second washer rings can act as a buffer, allowing the first, second, and third inner rings to be compressed together, thus improving the stability of the overall structure during operation.

[0025] Compared with the prior art, the beneficial effects of this utility model are as follows: a non-metallic shielding sleeve is set in the central hole of the flange seat, and the non-metallic shielding sleeve and the inner sidewall of the central hole cooperate to form an annular cavity, which is used to set up the sensor, stator, coil and other structures; since the non-metallic shielding sleeve is made of non-metallic material, it avoids weakening or even damaging the sensor signal and reduces the impact on the sensor; at the same time, it also avoids the problem of eddy current loss and heat generation of the metal shielding structure, and improves the output efficiency of the electromagnetic bearing.

[0026] When the non-metallic shielding end cap is placed on the end face of the mounting base, the non-metallic shielding end cap presses against the sealing ring, which provides a seal. Furthermore, the non-metallic shielding end cap and the non-metallic shielding sleeve are formed as a single unit through welding and injection molding, effectively preventing liquid leakage into the annular cavity. Additionally, because the non-metallic shielding sleeve and the non-metallic shielding end cap have corrosion-resistant properties, this application can be used in harsh environments such as high temperature, corrosion, and humidity. Attached Figure Description

[0027] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0028] Figure 2 This is a cross-sectional view of the present invention.

[0029] Figure 3 This is an exploded schematic diagram of this utility model.

[0030] Figure 4 This is an exploded view of the present invention from another perspective.

[0031] In the figure: 1. Flange seat, 11. Center hole, 12. Annular cavity, 13. Mounting groove, 14. End face screw hole, 15. Annular groove, 16. First washer, 17. Second washer; 2. Non-metallic shielding assembly; 21. Non-metallic shielding end cap; 211. End face perforation; 22. Non-metallic shielding sleeve. 4. Sealing ring; 5. Stator; 6. Install the ring groove; 61. Ring seat threaded hole; 7. First inner ring; 71. First perforation; 72. First protrusion; 8. Second inner ring; 81. Second perforation; 82. Second protrusion; 83. Inductive sensor; 9. Third inner ring; 91. Third perforation; 92. Third protrusion; 93. Speed ​​sensor. Detailed Implementation

[0032] The technical solution of this utility model will be further described in detail below through specific embodiments and with reference to the accompanying drawings: Example 1: Refer to Figures 1 to 4 As shown, a non-metallic shielded electromagnetic bearing includes: Flange seat 1, with a central hole 11 at its center; The non-metallic shielding assembly 2 includes non-metallic shielding end caps 21 disposed on both end faces of the flange seat 1 and a non-metallic shielding sleeve 22 coaxially disposed with the central hole 11. The two ends of the non-metallic shielding sleeve 22 are respectively connected to the two non-metallic shielding end caps 21; the non-metallic shielding sleeve 22 and the side wall of the central hole 11 cooperate to form an annular cavity 12. The sensor is located inside the annular cavity 12.

[0033] This application provides a non-metallic shielding sleeve 22 inside the central hole 11 of the flange seat 1. The non-metallic shielding sleeve 22 and the inner wall of the central hole 11 cooperate to form an annular cavity 12, which is used to house structures such as sensors, stators, and coils. Since the non-metallic shielding sleeve 22 is made of non-metallic material, it can avoid weakening the sensor signal and reduce the impact on the sensor. At the same time, it also avoids the problem of eddy current loss and heat generation in metal shielding structures, and improves the output efficiency of electromagnetic bearings. In addition, since the non-metallic shielding sleeve 22 and the non-metallic shielding end cap 21 have anti-corrosion functions, this application can be used in high-temperature and corrosive environments.

[0034] In one embodiment, the non-metallic shielding sleeve 22 and the non-metallic shielding end cap 21 at one end are integrally formed. In this embodiment, the non-metallic shielding sleeve 22 and the non-metallic shielding end cap 21 are integrally injection molded. This results in a simpler structure, lower cost, and the ability to withstand harsh environments such as water media and corrosion, avoiding the complex processes and high costs associated with metal encapsulation structures. The other end of the non-metallic shielding sleeve 22 is connected to the non-metallic shielding end cap 21 by welding. In this embodiment, laser welding is used to weld the non-metallic shielding sleeve 22 and the non-metallic shielding end cap 21 together, ensuring a sealed connection between both ends of the non-metallic shielding sleeve 22 and the non-metallic shielding end cap 21, thus forming a sealed structure within the annular cavity 12.

[0035] In one embodiment, mounting grooves 13 are provided on both end faces of the flange seat 1, and a non-metallic shielding end cap 21 is disposed within the mounting grooves 13. The non-metallic shielding end cap 21 fits into the mounting grooves 13, facilitating the installation and positioning of the non-metallic shielding end cap 21.

[0036] In one embodiment, end face screw holes 14 are provided on both end faces of the flange seat 1, and the end face screw holes 14 are located in the circumferential direction of the central hole 11; the non-metallic shielding end cap 21 is provided with end face through holes 211 that mate with the end face screw holes 14. During installation, the end face through holes 211 are aligned with the end face screw holes 14, and then the bolts are passed through the end face through holes 211 and threaded into the end face screw holes 14, thereby fixing the non-metallic shielding end cap 21 to the end face of the flange seat 1. In this application, there are six end face screw holes 14 and six end face through holes 211, which are evenly distributed in the circumferential direction of the central hole 11.

[0037] Furthermore, in this application, to improve the sealing performance between the non-metallic shielding end cap 21 and the flange seat 1 end face, annular grooves 15 are provided on both sides of the flange seat 1, circumferentially surrounding the central hole 11. A sealing ring 4 is disposed within the annular groove 15. When the non-metallic shielding end cap 21 is placed on the flange seat 1 end face, the non-metallic shielding end cap 21 presses against the sealing ring 4, and the sealing ring 4 provides a seal, preventing liquid leakage into the annular cavity 12. Therefore, in this application, the thickness of the sealing ring 4 is greater than the depth of the annular groove 15.

[0038] In one embodiment, a plurality of stators 5 and coils are disposed within the annular cavity 12, with the coils wound around the stators 5. The annular cavity 12 forms a sealed cavity with the cooperation of the non-metallic shielding end cap 21 and the non-metallic shielding sleeve 22. The stators 5, coils, and sensor structure are disposed within the annular cavity 12, enabling operation in humid environments.

[0039] The working principle of this application is as follows: In this utility model, a non-metallic shielding sleeve 22 is provided in the central hole 11 of the flange seat 1. The non-metallic shielding sleeve 22 and the inner sidewall of the central hole 11 cooperate to form an annular cavity 12. The annular cavity 12 is used to set up the sensor, stator 5, coil and other structures. Since the non-metallic shielding sleeve 22 is made of non-metallic material, it avoids weakening or even damaging the sensor signal and reduces the impact on the sensor. At the same time, it also avoids the problem of eddy current loss and heat generation of the metal shielding structure and improves the output efficiency of the electromagnetic bearing.

[0040] When the non-metallic shielding end cap 21 is installed on the end face of the flange seat 1, the non-metallic shielding end cap 21 presses against the sealing ring 4, and the sealing ring 4 performs a sealing function. Furthermore, the non-metallic shielding end cap 21 and the non-metallic shielding sleeve 22 are formed into an integral structure through welding and injection molding, effectively preventing liquid leakage into the annular cavity 12. In addition, because the non-metallic shielding sleeve 22 and the non-metallic shielding end cap 21 have corrosion-resistant properties, this application can be used in harsh environments such as high temperature, corrosion, and humidity.

[0041] Example 2: Refer to Figures 1 to 4 As shown, a non-metallic shielded electromagnetic bearing includes: Flange seat 1, with a central hole 11 at its center; The non-metallic shielding assembly 2 includes non-metallic shielding end caps 21 disposed on both end faces of the flange seat 1 and a non-metallic shielding sleeve 22 coaxially disposed with the central hole 11. The two ends of the non-metallic shielding sleeve 22 are respectively connected to the two non-metallic shielding end caps 21; the non-metallic shielding sleeve 22 and the side wall of the central hole 11 cooperate to form an annular cavity 12. The sensor is located inside the annular cavity 12.

[0042] This application provides a non-metallic shielding sleeve 22 inside the central hole 11 of the flange seat 1. The non-metallic shielding sleeve 22 and the inner wall of the central hole 11 cooperate to form an annular cavity 12, which is used to house structures such as sensors, stators, and coils. Since the non-metallic shielding sleeve 22 is made of non-metallic material, it can avoid weakening the sensor signal and reduce the impact on the sensor. At the same time, it also avoids the problem of eddy current loss and heat generation in metal shielding structures, and improves the output efficiency of electromagnetic bearings. In addition, since the non-metallic shielding sleeve 22 and the non-metallic shielding end cap 21 have anti-corrosion functions, this application can be used in high-temperature and corrosive environments.

[0043] In one embodiment, the non-metallic shielding sleeve 22 and the non-metallic shielding end cap 21 at one end are integrally formed. In this embodiment, the non-metallic shielding sleeve 22 and the non-metallic shielding end cap 21 are integrally injection molded. This results in a simpler structure, lower cost, and the ability to withstand harsh environments such as water media and corrosion, avoiding the complex processes and high costs associated with metal encapsulation structures. The other end of the non-metallic shielding sleeve 22 is connected to the non-metallic shielding end cap 21 by welding. In this embodiment, laser welding is used to weld the non-metallic shielding sleeve 22 and the non-metallic shielding end cap 21 together, ensuring a sealed connection between both ends of the non-metallic shielding sleeve 22 and the non-metallic shielding end cap 21, thus forming a sealed structure within the annular cavity 12.

[0044] In one embodiment, mounting grooves 13 are provided on both end faces of the flange seat 1, and a non-metallic shielding end cap 21 is disposed within the mounting grooves 13. The non-metallic shielding end cap 21 fits into the mounting grooves 13, facilitating the installation and positioning of the non-metallic shielding end cap 21.

[0045] In one embodiment, end face screw holes 14 are provided on both end faces of the flange seat 1, and the end face screw holes 14 are located in the circumferential direction of the central hole 11; the non-metallic shielding end cap 21 is provided with end face through holes 211 that mate with the end face screw holes 14. During installation, the end face through holes 211 are aligned with the end face screw holes 14, and then the bolts are passed through the end face through holes 211 and threaded into the end face screw holes 14, thereby fixing the non-metallic shielding end cap 21 to the end face of the flange seat 1. In this application, there are six end face screw holes 14 and six end face through holes 211, which are evenly distributed in the circumferential direction of the central hole 11.

[0046] Furthermore, in this application, to improve the sealing performance between the non-metallic shielding end cap 21 and the flange seat 1 end face, annular grooves 15 are provided on both sides of the flange seat 1, circumferentially surrounding the central hole 11. A sealing ring 4 is disposed within the annular groove 15. When the non-metallic shielding end cap 21 is placed on the flange seat 1 end face, the non-metallic shielding end cap 21 presses against the sealing ring 4, and the sealing ring 4 provides a seal, preventing liquid leakage into the annular cavity 12. Therefore, in this application, the thickness of the sealing ring 4 is greater than the depth of the annular groove 15.

[0047] In one embodiment, a plurality of stators 5 and coils are disposed within the annular cavity 12, with the coils wound around the stators 5. The annular cavity 12 forms a sealed cavity with the cooperation of the non-metallic shielding end cap 21 and the non-metallic shielding sleeve 22. The stators 5, coils, and sensor structure are disposed within the annular cavity 12, enabling operation in humid environments.

[0048] This embodiment is similar in structure to that in embodiment 1, except that a mounting ring seat 6 is provided in the circumferential direction at one end of the annular cavity 12. A first inner ring 7, a second inner ring 8 and a third inner ring 9 are stacked sequentially on the mounting ring seat 6. Several mounting bolts pass through the third inner ring 9, the second inner ring 8 and the first inner ring 7 in sequence and are threadedly connected to the mounting ring seat 6.

[0049] Specifically, the mounting ring seat 6 is provided with a ring seat threaded hole 61, the first inner ring 7 is provided with a plurality of first through holes 71, the second inner ring 8 is provided with a plurality of second through holes 81, and the third inner ring 9 is provided with a plurality of third through holes 91; the positions of the first through holes 71, the second through holes 81, and the third through holes 91 are corresponding, and the mounting bolts pass through the third through holes 91, the second through holes 81, and the first through holes 71 in sequence and are fixedly connected to the ring seat threaded hole 61, thereby fixing the three inner rings in the annular cavity 12. In this embodiment, there are eight first through holes 71, eight second through holes 81, eight third through holes 91, and eight mounting bolts.

[0050] A plurality of first protrusions 72 are arranged circumferentially on the inner sidewall of the first inner ring 7. A stator 5 is fitted onto the first protrusions 72, and a coil is wound on the stator 5. The first protrusions 72 are arranged radially. The stator 5 fitted onto the first protrusions 72 can fix the stator 5 and improve the stability of the overall structure during operation.

[0051] Several second protrusions 82 are arranged circumferentially on the inner sidewall of the second inner ring 8, and an inductive sensor 83 is fitted onto each second protrusion 82. The second protrusions 82 are arranged radially. The inductive sensor 83 is fitted onto the second protrusion 82, which serves to position the inductive sensor 83 and improve the stability of the overall structure during operation.

[0052] Several third protrusions 92 are arranged circumferentially on the inner wall of the third inner ring 9, and a speed sensor 93 is fitted onto each third protrusion 92. The third protrusions 92 are arranged radially. The speed sensor 93 is fitted onto the third protrusion 92 and plays a positioning role for the inductive sensor 83, thereby improving the stability of the overall structure during operation.

[0053] A first washer 16 is provided between the first inner ring 7 and the second inner ring 8, and the first washer 16 also has a through hole for easy passage of the mounting bolt. A second washer 17 is provided between the second inner ring 8 and the third inner ring 9, and the second washer 17 also has a through hole for easy passage of the mounting bolt. The first washer 16 and the second washer 17 provide a buffering effect, allowing the first inner ring 7, the second inner ring 8, and the third inner ring 9 to be compressed together, thereby improving the stability of the overall structure during operation.

[0054] The working principle of this application is as follows: In this utility model, a non-metallic shielding sleeve 22 is provided in the central hole 11 of the flange seat 1. The non-metallic shielding sleeve 22 and the inner sidewall of the central hole 11 cooperate to form an annular cavity 12. The annular cavity 12 is used to set up the sensor, stator 5, coil and other structures. Since the non-metallic shielding sleeve 22 is made of non-metallic material, it avoids weakening or even damaging the sensor signal and reduces the impact on the sensor. At the same time, it also avoids the problem of eddy current loss and heat generation of the metal shielding structure and improves the output efficiency of the electromagnetic bearing.

[0055] When the non-metallic shielding end cap 21 is installed on the end face of the flange seat 1, the non-metallic shielding end cap 21 presses against the sealing ring 4, and the sealing ring 4 performs a sealing function. Furthermore, the non-metallic shielding end cap 21 and the non-metallic shielding sleeve 22 are formed into an integral structure through welding and injection molding, effectively preventing liquid leakage into the annular cavity 12. In addition, because the non-metallic shielding sleeve 22 and the non-metallic shielding end cap 21 have corrosion-resistant properties, this application can be used in harsh environments such as high temperature, corrosion, and humidity.

[0056] The embodiments described above are merely preferred solutions of this utility model and are not intended to limit this utility model in any way. Other variations and modifications are possible without departing from the technical solutions described in the claims.

Claims

1. A non-metallic shielded electromagnetic bearing, characterized in that, include: The flange seat has a central hole in its center; The non-metallic shielding assembly includes non-metallic shielding end caps disposed on both ends of the flange seat and a non-metallic shielding sleeve coaxially disposed with the central hole. The two ends of the non-metallic shielding sleeve are respectively connected to the two non-metallic shielding end caps; the non-metallic shielding sleeve and the side wall of the central hole cooperate to form an annular cavity. The sensor is located inside the annular cavity.

2. The non-metallic shielded electromagnetic bearing according to claim 1, characterized in that the non-metallic... The shielding sleeve and the non-metallic shielding end cap at one end are integrally formed.

3. The non-metallic shielded electromagnetic bearing according to claim 2, characterized in that, The other end of the non-metallic shielding sleeve is connected to the non-metallic shielding end cap by welding.

4. The non-metallic shielded electromagnetic bearing according to any one of claims 1 to 3, characterized in that, Mounting grooves are provided on both ends of the flange seat, and non-metallic shielding end caps are installed in the mounting grooves.

5. The non-metallic shielded electromagnetic bearing according to claim 4, characterized in that, End face screw holes are provided on both sides of the flange seat, and the end face screw holes are located in the circumferential direction of the center hole; the non-metallic shielding end cover is provided with end face through holes that mate with the end face screw holes.

6. The non-metallic shielded electromagnetic bearing according to claim 1, characterized in that, A mounting ring seat is provided circumferentially at one end of the annular cavity. A second inner ring and a third inner ring are stacked sequentially on one side of the mounting ring seat, and a first inner ring is stacked on the other side of the mounting ring seat. Several first mounting bolts pass through the third inner ring and the second inner ring mounting ring seat and are threadedly connected. Several second mounting bolts pass through the first inner ring and are threadedly connected to the mounting ring seat.

7. The non-metallic shielded electromagnetic bearing according to claim 6, characterized in that, The inner wall of the first inner ring has several first protrusions arranged in the circumferential direction. A stator is fitted on the first protrusions, and a coil is wound on the stator.

8. The non-metallic shielded electromagnetic bearing according to claim 6, characterized in that, Several second protrusions are arranged in the circumferential direction on the inner sidewall of the second inner ring, and an inductive sensor is sleeved on the second protrusion.

9. The non-metallic shielded electromagnetic bearing according to claim 6, characterized in that, Several third protrusions are arranged in the circumferential direction on the inner sidewall of the third inner ring, and a speed sensor is sleeved on the third protrusion.

10. The non-metallic shielded electromagnetic bearing according to any one of claims 6 to 9, characterized in that, A first washer ring is provided between the third inner ring and the second inner ring.

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