Filling and sealing device for magnetic bearing

Abstract

The utility model provides an encapsulation device for a magnetic bearing, the encapsulation device comprises a base, a central stopper and a plurality of peripheral stoppers, the central stopper and the plurality of peripheral stoppers are arranged above the base, and the plurality of peripheral stoppers are arranged around the central stopper. And an encapsulation cavity is respectively defined among each peripheral stopper, the central stopper and the base. The filling and sealing device can be used for filling and sealing a plurality of magnetic bearing structural parts simultaneously, so that the production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of magnetic bearing auxiliary devices, and specifically, to a potting device for a magnetic bearing. Background Art

[0002] In a magnetic levitation high-speed motor device, after the magnetic bearing is manufactured, potting materials are required to pot and protect various structural components and electrical components. A magnetic bearing is potted by structural components in four directions, and these four magnetic bearing structural components are evenly distributed circumferentially along their common axis. Due to the high rotational speed of the magnetic levitation motor, it is required that the magnetic bearing has extremely high dimensional accuracy and geometric form and position tolerance accuracy. In current magnetic bearing production, the generally used potting device can only pot one magnetic bearing structural component at a time, resulting in low operation efficiency and inconvenience in operation. At the same time, the dimensional accuracy and form and position tolerance of the potted magnetic bearing structural components after assembly cannot meet the requirements.

[0003] Therefore, it is necessary to provide an improved potting device for a magnetic bearing to overcome or reduce at least some of the disadvantages existing in the above-mentioned prior art. Summary of the Utility Model

[0004] In the present utility model, a potting device for a magnetic bearing is provided. The potting device includes: a base, a central stopper, and a plurality of peripheral stoppers. The central stopper and the plurality of peripheral stoppers are arranged above the base, and the plurality of peripheral stoppers are arranged around the central stopper, so that a potting cavity is respectively defined between each peripheral stopper, the central stopper, and the base.

[0005] Optionally, the base, the central stopper, and the plurality of peripheral stoppers are configured such that the structures of the plurality of defined potting cavities are the same.

[0006] Optionally, the base is formed with demolding through holes in the part between two adjacent peripheral stoppers.

[0007] Optionally, each peripheral stopper includes a main baffle and two side baffles. Among them, the main baffle and the central stopper are arranged at intervals, the two side baffles are respectively arranged on both sides of the main baffle, and both ends of each side baffle are respectively connected to the central stopper and the main baffle.

[0008] Optionally, a plurality of positioning pins are arranged on the base;

[0009] At least one positioning hole is formed on the lower surface of each main baffle, and the positioning hole is adapted to the positioning pin.

[0010] Optionally, the main baffle and the side baffle are detachably connected.

[0011] Optionally, the main baffle is formed with a plurality of fixing holes for structural components; and / or

[0012] The main baffle is formed with a first notch at a portion close to the base; and / or

[0013] The side baffle is formed with a second notch at a portion close to the main baffle.

[0014] Optionally, the base and the central stopper are of a hollow cylindrical structure with a common axis, and the main baffle is of an arc-shaped structure.

[0015] Optionally, the central stopper includes a horizontal ring portion and a vertical ring portion, the vertical ring portion is formed by extending downward from the horizontal ring portion, and the outer diameter of the horizontal ring portion is greater than that of the vertical ring portion;

[0016] The base includes a main base portion, a first step portion and a second step portion, the second step portion is formed by extending upward from the inner end of the main base portion, the first step portion is formed around the second step portion, and the height of the first step portion is less than that of the second step portion;

[0017] Wherein, the vertical ring portion is connected to the second step portion, and the inner end of the side baffle is connected to the horizontal ring portion and the first step portion.

[0018] Optionally, the materials of the base, the central stopper and the peripheral stoppers are wear-resistant metals; and / or

[0019] The number of the peripheral stoppers is four, and the four peripheral stoppers are arranged around the central stopper at uniform intervals.

[0020] The potting device for magnetic bearings of the present utility model is configured to include a base, a central stopper and a plurality of peripheral stoppers. The central stopper and the plurality of peripheral stoppers are arranged above the base, and the plurality of peripheral stoppers are arranged around the central stopper such that a potting cavity is respectively defined between each peripheral stopper, the central stopper and the base, so that the potting device can pot multiple magnetic bearing structural parts simultaneously, improving the production efficiency.

[0021] Further, in the potting device of the present utility model, the base, the central stopper and the plurality of peripheral stoppers are configured such that the structures of the defined plurality of potting cavities are the same, thereby improving the dimensional accuracy and the form and position tolerance accuracy of the magnetic bearing structural parts.

[0022] Those skilled in the art will better understand the above and other objects, advantages and features of the present utility model according to the following detailed description of the specific embodiments of the present utility model in conjunction with the accompanying drawings. Description of the Drawings

[0023] The features, advantages and exemplary embodiments of the present utility model will be described below with reference to the accompanying drawings, in which the same reference numerals indicate the same elements, and wherein:

[0024] Figure 1 is a three-dimensional schematic view of the potting device for magnetic bearings according to an embodiment of the present utility model;

[0025] Figure 2 is Figure 1 A partial enlarged view of the potting device;

[0026] Figure 3 is Figure 1 An exploded view of the potting device;

[0027] Figure 4 is Figure 1 A top view of the potting device;

[0028] Figure 5 is Figure 1 A side view of the potting device. Detailed implementation manners

[0029] The exemplary embodiments of the present utility model will be described in detail below with reference to the accompanying drawings. The description of the exemplary embodiments is merely exemplary and in no way limits the present utility model and its application or use. Moreover, the dimensions and proportions of the components in the drawings are merely illustrative and do not strictly correspond to the actual products.

[0030] The present utility model provides a potting device for a magnetic bearing. The potting device includes a base 1, a central stopper 4, and a plurality of peripheral stoppers 10. The central stopper 4 and the plurality of peripheral stoppers 10 are disposed above the base 1, and the plurality of peripheral stoppers 10 are arranged around the central stopper 4 such that a potting cavity 7 is respectively defined between each peripheral stopper 10, the central stopper 4, and the base 1. The potting device for a magnetic bearing according to the embodiment of the present utility model is configured to include a base 1, a central stopper 4, and a plurality of peripheral stoppers 10. The central stopper 4 and the plurality of peripheral stoppers 10 are disposed above the base 1, and the plurality of peripheral stoppers 10 are arranged around the central stopper 4 such that a potting cavity 7 is respectively defined between each peripheral stopper 10, the central stopper 4, and the base 1. By placing magnetic bearing structural members and the like in the potting cavity 7 and then performing potting, since there are a plurality of potting cavities 7, the potting device can pot a plurality of magnetic bearing structural members simultaneously, improving the production efficiency.

[0031] The composition and the like of the potting device according to the embodiment of the present utility model will be introduced in more detail below with reference to the accompanying drawings.

[0032] The base 1 of the potting device of the present utility model is used to fix the central stopper 4 and the plurality of peripheral stoppers 10, and the base 1 forms the bottom of the potting cavity 7; the central stopper 4 is located at the center of the entire device and is used to form the inner wall portion of the potting cavity 7; the peripheral stoppers 10 are used to form the outer wall portion and the side wall portion of the potting cavity 7. The base 1 and the peripheral stoppers 10, the central stopper 4 can be connected in any detachable manner. Referring to Figure 1 and Figure 3 , the base 1 and the peripheral stoppers 10, the central stopper 4 are detachably connected by fasteners, and the fasteners are, for example, bolts.

[0033] The number of the peripheral stoppers 10 of the potting device of the present utility model, that is, the number of the potting cavities 7, can be 2, 3, 4 or more. Considering that currently a magnetic bearing is usually potted from structural members in four directions, the number of the peripheral stoppers 10 can be 4, and the 4 peripheral stoppers 10 are arranged around the central stopper 4 at equal intervals. The base 1, the central stopper 4 and the multiple peripheral stoppers 10 together define 4 potting cavities 7, as Figure 1 and Figure 4 shown. Continuing to refer to Figure 1 and Figure 4 , the base 1 and the central stopper 4 can be hollow cylindrical structures and have a common axis, and the 4 peripheral stoppers 10 are arranged around the central stopper 4 at equal intervals in the circumferential direction. The base 1 and the central stopper 4 are arranged as hollow structures, which can reduce the overall material weight of the potting device and reduce the cost.

[0034] The structures of the multiple potting cavities 7 can be the same or different. When there are more than 2 potting cavities 7, the structures of some of the potting cavities 7 can be the same, while the structures of some other potting cavities 7 can be different. In some embodiments, the base 1, the central stopper 4 and the multiple peripheral stoppers 10 of the potting device of the embodiment of the present utility model are configured such that the multiple defined potting cavities 7 have the same structure. By configuring the base 1, the central stopper 4 and the multiple peripheral stoppers 10 such that the multiple defined potting cavities 7 have the same structure, the dimensional accuracy and the form and position tolerance accuracy of the magnetic bearing structural members can be improved; meanwhile, the manufacturing and assembly of the components of the potting device itself are simpler and the cost is lower. As Figure 1 and Figure 4 shown, 4 potting cavities 7 with the same structure are defined.

[0035] In a preferred embodiment, a demolding through hole 6 is formed in the part of the base 1 between two adjacent peripheral stoppers 10. In this way, after potting is completed, demolding can be achieved by using a tool to pass through the demolding through hole 6, effectively reducing the operation intensity and the operation difficulty. The demolding through hole 6 can be a hole with a threaded structure on the inner wall, so that after potting is completed, demolding can be completed by screwing a bolt.

[0036] The materials of the base 1, the central stopper 4 and the peripheral stoppers 10 of the potting device of the embodiment of the present utility model can be wear-resistant metals. The base 1, the central stopper 4 and the peripheral stoppers 10 are all precision machined from wear-resistant metals, which can help to achieve high potting dimensional accuracy. The wear-resistant metal can be, for example, 7075 aviation aluminum alloy, stainless steel, die steel, etc.

[0037] Each peripheral baffle 10 may include a main baffle 2 and two side baffles 3. Among them, the main baffle 2 and the central baffle 4 are arranged at intervals. The two side baffles 3 are respectively arranged on both sides of the main baffle 2, and both ends of each side baffle 3 are respectively connected to the central baffle 4 and the main baffle 2. As Figure 1 , Figure 2 and Figure 4 shown, the main baffle 2 is an arc-shaped structure and is arranged at intervals with the central baffle 4 in the radial direction. A side baffle 3 is arranged on each of the circumferential two sides of the arc-shaped main baffle 2.

[0038] The peripheral baffle 10 may be an integral structure or a split structure. That is, the main baffle 2 and the side baffle 3 may be integrally formed or detachably connected. As Figure 1 and Figure 2 shown, a plurality of first fixing holes 81 are respectively formed at the connecting portions of the main baffle 2 and the side baffle 3. Thus, the main baffle 2 and the side baffle 3 can be detachably connected by using fasteners, and the fasteners are, for example, screws.

[0039] In order to ensure the assembly accuracy of the peripheral baffle 10 and further improve the outer contour dimension accuracy of the magnetic bearing structural member after potting, positioning pins 5 may be provided on the base 1, and positioning holes (not shown in the figure) are formed on the lower surface of the outer baffle 10. The positioning holes are adapted to the positioning pins 5. Considering the size ratio of the main baffle 2 and the side baffle 3, generally, a plurality of positioning pins 5 are provided on the base 1; at least one positioning hole is formed on the lower surface of each main baffle 2, and the positioning hole is adapted to the positioning pin 5. The number of positioning holes of each main baffle 2 may be 1, 2 or more, preferably 2, which can effectively ensure the assembly accuracy and will not affect the assembly efficiency due to too many positioning holes. In Figure 3 the embodiment of, two positioning holes are formed on the lower surface of each main baffle 2, and two positioning pins 5 are provided on the base 1 corresponding to each main baffle 2.

[0040] In addition, a plurality of fixing holes 84 for structural members may be formed on the main baffle 2. In this way, fasteners such as screws can be used to perform spatial positioning on the magnetic bearing structural members and the like in the potting cavity 7. As Figure 1 and Figure 3 shown, a plurality of fixing holes 84 for structural members that penetrate in the radial direction may be formed on the main baffle 2.

[0041] A first notch 21 may also be formed on the main baffle 2 at the part close to the base 1; a second notch 31 may be formed on the side baffle 3 at the part close to the main baffle 2. By forming the first notch 21 and the second notch 31, it is easier to disassemble the main baffle 2 and the base 1, and the side baffle 3 and the main baffle 2, which is beneficial to demolding. As Figure 2As shown, a first notch 21 is formed in the lower part of the main baffle 2, and a second notch 31 is formed in the outer wall part of the side baffle 3.

[0042] In the potting device of the present utility model, the structures of the outer enclosure 10, the central baffle 4, and the base 1 can be configured such that a plurality of independent potting cavities 7 can be directly defined between the outer enclosure 10, the central baffle 4, and the base 1. In the potting device of the present utility model, the structures of the outer enclosure 10, the central baffle 4, and the base 1 can also be configured such that a plurality of interconnected potting cavities 7 are defined between the outer enclosure 10, the central baffle 4, and the base 1, and before potting magnetic bearing structural parts, etc., an additional auxiliary part is used to make the plurality of potting cavities 7 independent of each other. As Figure 1 , Figure 3 and Figure 5 shown, in the potting device of the present utility model, the central baffle 4 may include a horizontal ring portion 41 and a vertical ring portion 42, and the vertical ring portion 42 extends downward from the horizontal ring portion 41, wherein the outer diameter of the horizontal ring portion 41 is larger than the outer diameter of the vertical ring portion 42. The base 1 may include a main body base portion 11, a first step portion 12, and a second step portion 13, and the second step portion 13 extends upward from the inner end of the main body base portion 11, and the first step portion 12 is formed around the second step portion 13, and the height of the first step portion 12 is less than the height of the second step portion 13. The vertical ring portion 42 is in contact with the second step portion 13, and the inner end of the side baffle 3 is in contact with the horizontal ring portion 41 and the first step portion 12. By making the outer diameter of the horizontal ring portion 41 larger than the outer diameter of the vertical ring portion 42, making the base 1 include the main body base portion 11, the first step portion 12, and the second step portion 13, the lower end surface of the vertical ring portion 42 is in contact with the upper end surface of the second step portion 13, and the inner end of the side baffle 3 is in contact with the horizontal ring portion 41 and the first step portion 12, a gap can be formed between the lower end surface of the horizontal ring portion 41 beyond the vertical ring portion 42, the outer end surface of the vertical ring portion 42, the outer end surface of the second step portion 13, the upper end surface of the first step portion 12, and a part of the inner end surface of the side baffle 3. Before potting magnetic bearing structural parts, etc., an additional auxiliary part is used to fill this gap to make the plurality of potting cavities 7 independent of each other. There is no special limitation on the specific structure, setting steps, etc. of the auxiliary part. It can be understood that the lower part of the vertical ring portion 42 and the upper part of the second step portion 13 can also be connected in other ways. For example, a part of the second step portion 13 is radially sleeved by the lower part of the vertical ring portion 42. At this time, the part of the outer end surface of the second step portion 13 that is not sleeved by the vertical ring portion 42 constitutes a part of the gap.

[0043] Refer to Figure 3, a plurality of second fixing holes 82 are respectively formed in the main body base portion 11 of the base 1 and each of the main body baffle plates 2 and side baffle plates 3, so that the main body baffle plate 2 and the side baffle plate 3 can be detachably connected to the base 1 by bolts. A plurality of demolding through holes 6 are formed in the first stepped portion 12. A plurality of third fixing holes 83 are respectively formed in the central stopper 4 and the second stepped portion 13, so that the central stopper 4 can be detachably connected to the base 1 by bolts.

[0044] In a specific application, when the potting device of the embodiment of the present utility model is in use, first, the central stopper 4, the main body baffle plate 2, and the side baffle plate 3 are fixed on the base 1 by bolts; then, 4 magnetic bearing structural members are respectively placed in 4 independent potting cavities 7 and fixed by screws; finally, the potting material is poured into the 4 potting cavities 7, and the potting is completed after the potting material is cured.

[0045] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "one example", "some examples", or "preferred embodiment" etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0046] The embodiments of the present utility model have been described in detail above. However, the aspects of the present utility model are not limited to the above embodiments. Without departing from the scope of the present utility model, various modifications and substitutions can be applied to the above embodiments.

Claims

1. A potting device for a magnetic bearing, characterized in that: The encapsulation device includes: a base, a central stopper and a plurality of peripheral stoppers, wherein the central stopper and the plurality of peripheral stoppers are arranged above the base, and the plurality of peripheral stoppers are arranged around the central stopper, so that an encapsulation cavity is defined between each of the peripheral stoppers, the central stopper and the base.

2. The potting device according to claim 1, characterized in that: The base, the central stopper and the plurality of peripheral stoppers are configured such that the structures of the plurality of potting cavities defined therein are identical.

3. The potting device according to claim 2, characterized in that: The base is formed with a demoulding through hole at a portion between two adjacent peripheral stoppers.

4. The potting device according to any one of claims 1 to 3, characterized in that: Each of the peripheral baffles includes a main baffle and two side baffles, wherein the main baffle and the central baffle are spaced apart, the two side baffles are arranged on both sides of the main baffle, and both ends of each side baffle are respectively connected to the central baffle and the main baffle.

5. The potting device according to claim 4, characterized in that: A plurality of positioning pins are arranged on the base; At least one positioning hole is formed on the lower surface of each of the main body baffles, and the positioning hole is matched with the positioning pin.

6. The potting device according to claim 4, characterized in that: The main body baffle and the side baffle are detachably connected.

7. The potting device according to claim 4, characterized in that: The main baffle is formed with a plurality of fixing holes for structural members; and / or The main body baffle is formed with a first notch at a portion close to the base; and / or The side baffle is formed with a second notch at a portion close to the main baffle.

8. The potting device according to claim 4, characterized in that: The base and the center stopper are hollow cylindrical structures with a common axis, and the main body baffle is an arc-shaped structure.

9. The potting device according to claim 8, characterized in that: The central stopper comprises a horizontal ring portion and a vertical ring portion, wherein the vertical ring portion is formed by extending downward from the horizontal ring portion, wherein the outer diameter of the horizontal ring portion is greater than the outer diameter of the vertical ring portion; The base comprises a main body base, a first step portion and a second step portion, wherein the second step portion is formed by extending upward from the inner end of the main body base, the first step portion is formed around the second step portion, and the height of the first step portion is smaller than the height of the second step portion; The vertical ring portion is connected to the second step portion, and the inner end of the side baffle is connected to the horizontal ring portion and the first step portion.

10. The potting device according to claim 1, characterized in that: The base, the central stopper, and the peripheral stopper are made of wear-resistant metal; and / or The number of the peripheral stoppers is four, and the four peripheral stoppers are evenly spaced and arranged around the central stopper.

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