Glue pouring device for shielding type electromagnetic bearing

Abstract

The utility model discloses a glue filling device for a shielding type electromagnetic bearing, and aims to provide the glue filling device for the shielding type electromagnetic bearing, which can effectively solve the problems of swelling and damage of a shielding sleeve caused by colloid extrusion and thermal expansion in the glue filling process of an electromagnetic bearing stator. The sealing structure comprises an upper blank cap and a lower blank cap, the upper blank cap and the lower blank cap are connected through a connecting bolt, an annular upper sealing ring groove is formed in the side, facing the lower blank cap, of the upper blank cap, an upper sealing ring matched with one end of an electromagnetic bearing is arranged in the annular upper sealing ring groove, an annular lower sealing ring groove is formed in the side, facing the upper blank cap, of the lower blank cap, and a lower sealing ring matched with the other end of the electromagnetic bearing is arranged in the annular lower sealing ring groove. A lower sealing ring matched with the other end of the electromagnetic bearing is arranged in the annular lower sealing ring groove; the air inlet connector is arranged in the middle of the lower blank cap and located on the inner side of the lower sealing ring or arranged in the middle of the upper blank cap and located on the inner side of the upper sealing ring.

Description

Technical Field

[0001] This invention relates to the field of electromagnetic bearing potting technology, and more specifically to a potting device for shielded electromagnetic bearings. Background Technology

[0002] Shielded electromagnetic bearings are commonly used in corrosive or liquid environments. Compared to traditional electromagnetic bearings, they require an additional shielding structure to encapsulate the bearing. For example, Chinese Patent Publication No. CN117605760A describes an invention entitled "A Novel Shielded Electromagnetic Bearing Structure," which includes a stator housing, a stator pressure ring, a stator core, stator coils, and a stator shielding sleeve.

[0003] During operation, the heat from the conveyor belt is trapped within the enclosed cavity of the electromagnetic bearing, making heat dissipation difficult. Furthermore, the addition of a metal shielding sleeve (located on the inner wall of the central hole of the electromagnetic bearing stator, sealed integrally with the central hole wall) generates eddy current losses at the shielding sleeve location, accompanied by significant heat generation. Therefore, heat transfer in shielded electromagnetic bearings is crucial to their performance. To meet the requirements of electromagnetic bearings regarding voltage withstand strength, insulation strength, mechanical strength, thermal conductivity, and mechanical vibration control, it is necessary to pot and cure the enclosed cavity inside the electromagnetic bearing stator. However, current potting methods for shielded electromagnetic bearing stators have the following shortcomings: during the potting process, the compression and thermal expansion of the adhesive can cause the shielding sleeve to bulge and break, leading to damage to the shielded electromagnetic bearing. Summary of the Invention

[0004] The purpose of this invention is to provide a gluing device for electromagnetic bearings that can effectively solve the problem of bulging and damage of the shielding sleeve caused by the extrusion and thermal expansion of the glue during the gluing process of electromagnetic bearing stator.

[0005] The technical solution of this invention is:

[0006] A glue-potting device for shielded electromagnetic bearings, comprising:

[0007] The upper cover and the lower cover are connected by connecting bolts. The upper cover has an annular upper sealing ring groove on the side facing the lower cover, and an upper sealing ring that mates with one end of the electromagnetic bearing is provided in the annular upper sealing ring groove. The lower cover has an annular lower sealing ring groove on the side facing the upper cover, and a lower sealing ring that mates with the other end of the electromagnetic bearing is provided in the annular lower sealing ring groove.

[0008] The air inlet is located in the middle of the lower end cap and inside the lower sealing ring, or in the middle of the upper end cap and inside the upper sealing ring. The specific use of a shielded electromagnetic bearing potting device according to this solution is as follows.

[0009] The electromagnetic bearing stator is placed between the upper and lower end caps, which are sequentially distributed along the axial direction of the stator. By tightening the connecting bolts, the upper sealing ring of the upper end cap is sealed to one end face of the electromagnetic bearing stator (the upper sealing ring surrounds the outside of the central hole of the electromagnetic bearing stator), and the lower sealing ring of the lower end cap is sealed to the other end face of the electromagnetic bearing stator (the lower sealing ring surrounds the outside of the central hole of the electromagnetic bearing stator). This seals the upper and lower end caps at both ends of the electromagnetic bearing stator and covers both ends of the central hole, creating a sealed cavity within the central hole. The air intake port communicates with the sealed cavity formed by the central hole.

[0010] Next, pressurized gas is injected into the sealed cavity through the air inlet to make the pressure inside the sealed cavity reach the set value P1.

[0011] Next, glue is injected into the sealed cavity inside the electromagnetic bearing stator using a glue-filling machine. The glue-filling pressure is P2, and P1 is greater than P2. In this way, during the glue-filling process into the sealed cavity, since the pressure inside the sealed cavity is the set value P1, and P1 is greater than the glue-filling pressure P2, the problem of bulging and damage to the shielding sleeve caused by glue extrusion and thermal expansion can be effectively solved.

[0012] After the glue has cured, it can not only significantly improve the heat dissipation capacity of the shielded electromagnetic bearing, but also stabilize the electrical components of the electromagnetic bearing stator, effectively preventing the electrical components of the electromagnetic bearing stator from vibrating during operation, thereby effectively increasing the overall performance and reliability of the product.

[0013] Preferably, an intake valve is provided on the air intake interface. In this way, when the pressure in the sealed cavity reaches the set value P1, the pressure in the sealed cavity can be maintained at the set value P1 by closing the intake valve, and then the air supply pipeline can be disassembled for practical operation.

[0014] Preferably, it also includes an exhaust port, which is located in the middle of the lower cover and inside the lower sealing ring, or the exhaust port is located in the middle of the upper cover and inside the upper sealing ring.

[0015] Preferably, an exhaust valve is provided on the exhaust port. In this way, after the electromagnetic bearing stator is potted, the air pressure in the sealed cavity can be released by opening the exhaust valve.

[0016] Preferably, the upper cover is equipped with a sealing ring leakage detection mechanism, which includes:

[0017] A guide hole is provided on the upper end cap. One end of the guide hole is connected to the bottom of the groove of the annular upper sealing ring, and the other end of the guide hole is connected to the side of the upper end cap facing downward.

[0018] The detection rod is slidably installed inside the guide hole, with one end extending into the annular upper sealing ring groove. Since the upper sealing ring is installed within the annular upper sealing ring groove, it may be missing or fall off during actual use. Because the upper and lower end caps are sealed to both ends of the electromagnetic bearing stator, it is difficult to determine if the upper sealing ring is missing. If the upper sealing ring is missing or falls off, the air pressure inside the sealing cavity will leak during the glue-filling process, making it difficult to maintain a constant value of P1. This can easily lead to bulging and damage to the shielding sleeve due to glue compression and thermal expansion. To solve this problem, this solution specifically includes a sealing ring missing detection mechanism on the upper end cap. Specifically…

[0019] After the upper and lower end caps are sealed and connected to both ends of the electromagnetic bearing stator, the upper sealing ring can be installed by pushing the detection rod on the upper end cap into the annular upper sealing ring groove. If the detection rod is felt to be pressed against an elastic element, it indicates that the upper sealing ring is installed in the annular upper sealing ring groove. If the detection rod is felt to be pressed against a rigid element (i.e., against one end face of the electromagnetic bearing stator), it indicates that the upper sealing ring is missing. In this case, it is necessary to disassemble and reinstall the glue-filling device for the shielded electromagnetic bearing to install the upper sealing ring.

[0020] Preferably, when one end of the detection rod on the upper cover abuts against the upper sealing ring, the other end of the detection rod extends out to the outside of the guide hole.

[0021] Preferably, the lower cover is also equipped with a sealing ring leakage detection mechanism, which includes:

[0022] The guide hole is set on the lower end cap. One end of the guide hole is connected to the bottom of the annular lower sealing ring groove, and the other end of the guide hole is connected to the side of the lower end cap that is opposite to the upper end cap.

[0023] The detection rod is slidably installed inside the guide hole, with one end extending into the annular lower sealing ring groove. Since the lower sealing ring is installed within this groove, it may be missing or fall off during actual use. Because the upper and lower end caps are sealed together at both ends of the electromagnetic bearing stator, it's difficult to determine if the lower sealing ring is missing. If it is, during the potting process, the air pressure inside the sealing cavity will leak, making it difficult to maintain a constant value of P1. This can lead to bulging and damage to the shielding sleeve due to adhesive compression and thermal expansion. To address this issue, this solution specifically incorporates a sealing ring missing detection mechanism on the lower end cap.

[0024] After the upper and lower end caps are sealed and connected to both ends of the electromagnetic bearing stator, the detection rod on the lower end cap can be pushed into the annular lower sealing ring groove. If the detection rod is felt to be pressed against an elastic element, it indicates that the upper sealing ring is installed in the annular lower sealing ring groove. If the detection rod is felt to be pressed against a rigid element (i.e., against one end face of the electromagnetic bearing stator), it indicates that the upper sealing ring is missing. In this case, it is necessary to disassemble and reinstall the glue-filling device for the shielded electromagnetic bearing and install the lower sealing ring.

[0025] Preferably, when one end of the detection rod on the lower sealing ring is against the lower sealing ring, the other end of the detection rod extends out to the outside of the guide hole.

[0026] Preferably, the upper cover has a cover protrusion on the side facing the lower cover, and the annular upper sealing ring groove is provided on the end face of the cover protrusion.

[0027] Preferably, the lower cap has a cap groove on the side facing the upper cap, and the annular lower sealing ring groove is disposed on the bottom surface of the cap groove.

[0028] The beneficial effects of this invention are: during the process of filling the sealed cavity with adhesive, it can effectively solve the problem of bulging and damage to the shielding sleeve caused by adhesive extrusion and thermal expansion. After the adhesive has cured, it can not only significantly improve the heat dissipation capacity of the shielded electromagnetic bearing, but also stabilize the electrical components of the electromagnetic bearing stator, effectively preventing vibration of the electrical components of the electromagnetic bearing stator during operation, thereby effectively increasing the overall performance and reliability of the product. Attached Figure Description

[0029] Figure 1 This is a cross-sectional structural diagram of the glue-filling device for the shielded electromagnetic bearing of the present invention when it is installed on the stator of the shielded electromagnetic bearing.

[0030] Figure 2 This is a three-dimensional structural schematic diagram of the glue-potting device for the shielded electromagnetic bearing of the present invention being installed on the stator of the shielded electromagnetic bearing.

[0031] Figure 3 yes Figure 1 A schematic diagram of a cross-sectional structure at point AA.

[0032] Figure 4 This is a partial cross-sectional structural diagram of the gluing device for the shielded electromagnetic bearing being installed on the stator of the shielded electromagnetic bearing in a specific embodiment 2 of the present invention.

[0033] In the picture:

[0034] Electromagnetic bearing stator 1, enclosed cavity 1.0, lead wire hole 1.1, flange seat 1.2, stator support structure 1.3, shielding sleeve 1.4, sealing cavity 1.5;

[0035] 2.1 Upper end cap, 2.2 Lower end cap, 2.3 Connecting bolt, 2.4 Upper sealing ring, 2.5 Lower sealing ring, 2.6 Inlet port, 2.7 Inlet valve, 2.8 Exhaust port, 2.9 End cap boss, 2.10 Guide hole, 2.11 Detection rod. Detailed Implementation

[0036] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0037] Specific Implementation Example 1, such as Figure 1 , Figure 2 , Figure 3 As shown, a glue-filling device for a shielded electromagnetic bearing includes an upper cap 2.1, a lower cap 2.2, and an air inlet 2.6.

[0038] The upper cover 2.1 and the lower cover 2.2 are connected by connecting bolts 2.3. The upper cover 2.1 has an annular upper sealing groove on the side facing the lower cover 2.2, and an upper sealing ring 2.4 that mates with one end of the electromagnetic bearing is located within the annular upper sealing groove. The lower cover 2.2 has an annular lower sealing groove on the side facing the upper cover 2.1, and a lower sealing ring 2.5 that mates with the other end of the electromagnetic bearing is located within the annular lower sealing groove. In this embodiment, there are multiple connecting bolts 2.3, each distributed on the outside of the upper sealing ring 2.4 and the lower sealing ring 2.5, and each connecting bolt 2.3 is sequentially distributed along the circumference of the upper sealing ring 2.4.

[0039] The air intake port 2.6 is located in the middle of the lower end cap 2.2 and inside the lower sealing ring 2.5, or the air intake port 2.6 is located in the middle of the upper end cap 2.1 and inside the upper sealing ring 2.4. In this embodiment, the air intake port 2.6 is located in the middle of the lower end cap 2.2 and inside the lower sealing ring 2.5.

[0040] The specific use of the glue-potting device for a shielded electromagnetic bearing in this embodiment is as follows.

[0041] The electromagnetic bearing stator is placed between the upper end cap 2.1 and the lower end cap 2.2. The electromagnetic bearing stator has a central hole. The electromagnetic bearing stator contains a closed cavity 1.0. The outer wall of the electromagnetic bearing stator has two lead holes 1.1 communicating with the closed cavity 1.0. One lead hole 1.1 serves as the inlet for potting adhesive, and the other lead hole 1.1 serves as the vent during the potting process. The closed cavity 1.0 is composed of multiple interconnected winding cavities.

[0042] The upper cover 2.1 and the lower cover 2.2 are sequentially distributed along the axial direction of the electromagnetic bearing stator. By tightening the connecting bolts 2.3, the upper sealing ring 2.4 of the upper cover 2.1 is sealed to one end face of the electromagnetic bearing stator (the upper sealing ring 2.4 surrounds the outside of the central hole of the electromagnetic bearing stator), and the lower sealing ring 2.5 of the lower cover 2.2 is sealed to the other end face of the electromagnetic bearing stator (the lower sealing ring 2.5 surrounds the outside of the central hole of the electromagnetic bearing stator). This seals the upper cover 2.1 and the lower cover 2.2 at both ends of the electromagnetic bearing stator and covers both ends of the central hole of the electromagnetic bearing stator, forming a sealed cavity 1.5 in the central hole. The air inlet 2.6 communicates with the sealed cavity 1.5 formed by the central hole.

[0043] Next, pressurized gas is injected into the sealing cavity 1.5 through the air inlet 2.6 to make the pressure inside the sealing cavity 1.5 reach the set value P1. For example, the set value P1 is 1.2-2.5 MPa.

[0044] Next, glue is poured into the sealed cavity 1.0 through one of the lead holes 1.1 using a glue-pouring machine. The glue-pouring pressure is P2, and P1 is greater than P2. The gas inside the sealed cavity 1.0 is discharged through the other lead hole 1.1 until the sealed cavity 1.0 is full of glue. In this way, during the glue-pouring process into the sealed cavity 1.0, since the pressure inside the sealed cavity 1.5 is the set value P1, and P1 is greater than the glue-pouring pressure P2, the problem of bulging and damage to the shielding sleeve 1.4 caused by glue compression and thermal expansion can be effectively solved.

[0045] After the glue has cured, it can not only significantly improve the heat dissipation capacity of the shielded electromagnetic bearing, but also stabilize the electrical components of the electromagnetic bearing stator, effectively preventing the electrical components of the electromagnetic bearing stator from vibrating during operation, thereby effectively increasing the overall performance and reliability of the product.

[0046] The electromagnetic bearing stator 1 includes a flange seat 1.2, a stator support structure 1.3 located within the flange seat 1.2, and a shielding sleeve 1.4. A lead hole 1.1 is provided on the flange seat 1.2. A closed cavity 1.0 is formed between the stator support structure and the flange seat 1.2. The specific structure of the electromagnetic bearing stator is prior art and is not the inventive point of this application; therefore, this application will not elaborate on the specific structure of the electromagnetic bearing stator and other conventional technical means.

[0047] In one implementation, such as Figure 1 , Figure 2 , Figure 3As shown, the flange seat 1.2 has several axial mounting through holes arranged circumferentially around the central hole. These axial mounting through holes penetrate both end faces of the flange seat 1.2. Multiple connecting bolts 2.3 pass through the corresponding axial mounting through holes. For example, each connecting bolt 2.3 corresponds one-to-one with a axial mounting through hole. Of course, the number of connecting bolts 2.3 can be less than the number of axial mounting through holes. This allows for convenient installation of the upper and lower end caps at both ends of the electromagnetic bearing stator, while also restricting the installation position of the upper and lower end caps. This embodiment is suitable for applications where the flange seat 1.2 has axial mounting through holes.

[0048] In another embodiment, the upper end cap 2.1 and the lower end cap 2.2 are connected by 3-6 connecting bolts 2.3. The connecting bolts 2.3 are distributed around the outer side of the flange seat 1.2. This embodiment is suitable for applications where the flange seat 1.2 does not have axial mounting holes.

[0049] Furthermore, such as Figure 1 As shown, an intake valve 2.7 is provided on the intake port 2.6. Thus, when the pressure in the sealed cavity 1.5 reaches the set value P1, the pressure in the sealed cavity 1.5 can be maintained at the set value P1 by closing the intake valve 2.7, and then the air supply pipe can be disassembled for actual operation.

[0050] Furthermore, such as Figure 1 As shown, a glue-filling device for a shielded electromagnetic bearing further includes an exhaust port 2.8. The exhaust port 2.8 is located in the middle of the lower end cap 2.2 and inside the lower sealing ring 2.5, or in the middle of the upper end cap 2.1 and inside the upper sealing ring 2.4. An exhaust valve is provided on the exhaust port 2.8. Thus, after the electromagnetic bearing stator is glue-filled, the air pressure in the sealing cavity 1.5 can be released by opening the exhaust valve. It should be noted that the glue-filling fixture may also omit the exhaust port 2.8 and exhaust valve, and directly release the air pressure in the sealing cavity 1.5 by opening the air inlet valve 2.7 of the air inlet port 2.6.

[0051] In one example, the exhaust port 2.8 and the intake port 2.6 are located on the same cover, for example, both the exhaust port 2.8 and the intake port 2.6 are located on the lower cover 2.2.

[0052] In another example, one of the exhaust port 2.8 and the intake port 2.6 is mounted on an upper cover 2.1, and the other is mounted on a lower cover 2.2.

[0053] Furthermore, the upper cover 2.1 and the lower cover 2.2 are structurally matched with the electromagnetic bearing stator, specifically...

[0054] In one implementation, such as Figure 1As shown, one end (lower end) of flange seat 1.2 has an annular boss, and the other end (upper end) has a flange groove. The upper end cap 2.1 has an end cap boss 2.9 on the side facing the lower end cap 2.2, which mates with the flange groove. An annular upper sealing ring groove is located on the end face of the end cap boss 2.9. The lower end cap 2.2 has an end cap groove on the side facing the upper end cap 2.1, which mates with the annular boss. An annular lower sealing ring groove is located on the bottom surface of the end cap groove. When the upper end cap 2.1 and lower end cap 2.2 are sealed together at both ends of the electromagnetic bearing stator, the annular boss extends into the end cap groove, and the end cap boss 2.9 extends into the flange groove. Thus, the mating stability between the upper and lower end caps and the electromagnetic bearing stator is improved by the mating of the end cap groove with the annular boss, and the mating of the end cap boss 2.9 with the flange groove, and the relative positions of the upper and lower end caps and flange seat 1.2 are defined.

[0055] In another embodiment, one end (the lower end) of the flange seat 1.2 is provided with an annular boss, and the other end (the upper end) of the flange seat 1.2 is flat. The lower end cap 2.2 has an end cap groove on the side facing the upper end cap 2.1, which is used to mate with the annular boss. An annular lower sealing ring groove is provided on the bottom surface of the end cap groove. When the upper end cap 2.1 and the lower end cap 2.2 are sealed together at both ends of the electromagnetic bearing stator, the annular boss extends into the end cap groove. Thus, the mating stability between the upper and lower end caps and the electromagnetic bearing stator can be improved by the engagement of the end cap groove and the annular boss, and the relative positions of the upper and lower end caps and the flange seat 1.2 can be defined.

[0056] In the third embodiment, one end (the lower end) of the flange seat 1.2 is flat, and the other end (the upper end) of the flange seat 1.2 is provided with a flange groove. An upper end cap 2.1 has an end cap boss 2.9 on the side facing the lower end cap 2.2, which is used to mate with the flange groove. An annular upper sealing ring groove is provided on the end face of the end cap boss 2.9. When the upper end cap 2.1 and the lower end cap 2.2 are sealed together at both ends of the electromagnetic bearing stator, the end cap boss 2.9 extends into the flange groove. Thus, the mating stability between the upper and lower end caps and the electromagnetic bearing stator can be improved by the mating of the end cap boss 2.9 with the flange groove, and the relative positions of the upper and lower end caps and the flange seat 1.2 can be defined.

[0057] In this second specific embodiment, the remaining structure is the same as in the first specific embodiment, except that...

[0058] In this embodiment, as Figure 4As shown, the upper cover 2.1 is equipped with a sealing ring leakage detection mechanism. This mechanism includes a guide hole 2.10 and a detection rod 2.11. The guide hole 2.10 is located on the upper cover 2.1 and is perpendicular to the upper surface of the upper cover 2.1. One end of the guide hole 2.10 communicates with the bottom of the annular upper sealing ring groove, and the other end communicates with one side of the upper cover 2.1 facing downwards towards the lower cover 2.2. The detection rod 2.11 is slidably disposed within the guide hole 2.10, with one end extending into the annular upper sealing ring groove. When one end of the detection rod 2.11 on the upper cover 2.1 abuts against the upper sealing ring 2.4, the other end of the detection rod 2.11 extends outwards from the guide hole 2.10.

[0059] Since the upper sealing ring 2.4 is installed in the annular upper sealing ring groove, in actual use, the upper sealing ring 2.4 may be missing or fall off. After the upper end cap 2.1 and lower end cap 2.2 are sealed to both ends of the electromagnetic bearing stator, it becomes difficult to determine whether the upper sealing ring 2.4 is missing. If the upper sealing ring 2.4 is missing or falls off, the air pressure in the sealing cavity 1.5 will leak during the glue-filling process, making it difficult to maintain a constant value P1. This can easily lead to bulging and damage to the shielding sleeve 1.4 due to glue compression and thermal expansion. To solve this problem, this embodiment specifically includes a sealing ring missing detection mechanism on the upper end cap 2.1. Specifically…

[0060] After the upper cover 2.1 and the lower cover 2.2 are sealed and connected to both ends of the electromagnetic bearing stator, the upper sealing ring 2.4 can be installed in the annular upper sealing ring groove by pushing the detection rod 2.11 on the upper cover 2.1 into the annular upper sealing ring groove. If the detection rod 2.11 is felt to be against an elastic element, it means that the upper sealing ring 2.4 is installed in the annular upper sealing ring groove. If the detection rod 2.11 is felt to be against a rigid element (i.e., against one end face of the electromagnetic bearing stator), it means that the upper sealing ring 2.4 is missing. In this case, it is necessary to disassemble and reinstall the glue potting device for the shielded electromagnetic bearing and install the upper sealing ring 2.4.

[0061] In this embodiment, a strip groove is provided on the inner wall of the guide hole 2.10 on the upper cover 2.1. The strip groove extends axially along the guide hole 2.10. A limiting block is provided on the detection rod 2.11 inside the guide hole 2.10 on the upper cover 2.1. The limiting block extends into the strip groove and can slide along the strip groove, thereby preventing the detection rod 2.11 from coming out of the guide hole 2.10.

[0062] Furthermore, a sealing ring leakage detection mechanism is also provided on the lower cover 2.2. This sealing ring leakage detection mechanism includes a guide hole 2.10 and a detection rod 2.11. The guide hole 2.10 is located on the lower cover 2.2, with one end communicating with the bottom of the annular lower sealing ring groove, and the other end communicating with the side of the lower cover 2.2 facing away from the upper cover 2.1. The guide hole 2.10 is perpendicular to the lower surface of the lower cover 2.1. The detection rod 2.11 is slidably disposed within the guide hole 2.10, with one end of the detection rod 2.11 extending into the annular lower sealing ring groove. When one end of the detection rod 2.11 on the lower cover 2.2 abuts against the lower sealing ring 2.5, the other end of the detection rod 2.11 extends out of the guide hole 2.10.

[0063] Since the lower sealing ring 2.5 is installed in the annular lower sealing ring groove, it is possible that the lower sealing ring 2.5 may be missing or fall off during actual use. After the upper end cap 2.1 and the lower end cap 2.2 are sealed to both ends of the electromagnetic bearing stator, it becomes difficult to determine whether the lower sealing ring 2.5 is missing. If the lower sealing ring 2.5 is missing or falls off, the air pressure inside the sealing cavity 1.5 will leak during the glue-filling process, making it difficult to maintain a constant value P1. This can easily lead to bulging and damage to the shielding sleeve 1.4 due to glue compression and thermal expansion. To solve this problem, this embodiment specifically includes a sealing ring missing detection mechanism on the lower end cap 2.2.

[0064] After the upper cover 2.1 and the lower cover 2.2 are sealed and connected to both ends of the electromagnetic bearing stator, the detection rod 2.11 on the lower cover 2.2 can be pushed into the annular lower sealing ring groove. If the detection rod 2.11 is felt to be against an elastic element, it means that the upper sealing ring 2.4 is installed in the annular lower sealing ring groove. If the detection rod 2.11 is felt to be against a rigid element (i.e., against one end face of the electromagnetic bearing stator), it means that the upper sealing ring 2.4 is missing. In this case, it is necessary to disassemble and reinstall the glue-filling device for the shielded electromagnetic bearing and install the lower sealing ring 2.5.

[0065] In this embodiment, a strip groove is provided on the inner wall of the guide hole 2.10 on the upper cover 2.1. The strip groove extends axially along the guide hole 2.10. A limiting block is provided on the detection rod 2.11 inside the guide hole 2.10 on the upper cover 2.1. The limiting block extends into the strip groove and can slide along the strip groove, thereby preventing the detection rod 2.11 from coming out of the guide hole 2.10.

[0066] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Any simple modifications, alterations, and equivalent transformations made to the above embodiments based on the technical essence of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A potting device for a shielded electromagnetic bearing, characterized in that, include: The upper cover and the lower cover are connected by connecting bolts. The upper cover has an annular upper sealing ring groove on the side facing the lower cover, and an upper sealing ring that mates with one end of the electromagnetic bearing is provided in the annular upper sealing ring groove. The lower cover has an annular lower sealing ring groove on the side facing the upper cover, and a lower sealing ring that mates with the other end of the electromagnetic bearing is provided in the annular lower sealing ring groove. The air intake port is located in the middle of the lower end cap and inside the lower sealing ring, or in the middle of the upper end cap and inside the upper sealing ring.

2. The potting device for shielded electromagnetic bearings according to claim 1, characterized in that, An intake valve is provided on the air intake interface.

3. The potting device for shielded electromagnetic bearings according to claim 1, characterized in that, It also includes an exhaust port, which is located in the middle of the lower end cap and inside the lower sealing ring, or the exhaust port is located in the middle of the upper end cap and inside the upper sealing ring.

4. The potting device for shielded electromagnetic bearings according to claim 3, characterized in that, An exhaust valve is provided on the exhaust port.

5. The potting device for shielded electromagnetic bearings according to any one of claims 1-4, characterized in that, The upper cover is equipped with a sealing ring leakage detection mechanism, which includes: A guide hole is provided on the upper end cap. One end of the guide hole is connected to the bottom of the groove of the annular upper sealing ring, and the other end of the guide hole is connected to the side of the upper end cap facing downward. The detection rod is slidably set inside the guide hole, and one end of the detection rod can extend into the groove of the annular upper sealing ring.

6. The potting device for shielded electromagnetic bearings according to claim 5, characterized in that, When one end of the detection rod on the upper cover abuts against the upper sealing ring, the other end of the detection rod extends out to the outside of the guide hole.

7. The potting device for shielded electromagnetic bearings according to any one of claims 1-4, characterized in that, The lower cover is also equipped with a sealing ring leakage detection mechanism, which includes: The guide hole is set on the lower end cap. One end of the guide hole is connected to the bottom of the annular lower sealing ring groove, and the other end of the guide hole is connected to the side of the lower end cap that is opposite to the upper end cap. The detection rod is slidably set inside the guide hole, and one end of the detection rod can extend into the groove of the annular lower sealing ring.

8. The potting device for shielded electromagnetic bearings according to claim 7, characterized in that, When one end of the detection rod on the lower sealing ring is pressed against the lower sealing ring, the other end of the detection rod extends out to the outside of the guide hole.

9. The potting device for shielded electromagnetic bearings according to any one of claims 1-4, characterized in that, The upper cover has a cover protrusion on the side facing the lower cover, and the annular upper sealing ring groove is provided on the end face of the cover protrusion.

10. The potting device for shielded electromagnetic bearings according to any one of claims 1-4, characterized in that, The lower cover has a cover groove on the side facing the upper cover, and the annular lower sealing ring groove is disposed on the bottom surface of the cover groove.

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