Magnetic steel surface mounting tool for electromagnetic bearing stator

Abstract

The utility model relates to the technical field of tools, and discloses a magnetic steel surface mounting tool for an electromagnetic bearing stator, which comprises an upper positioning disc and a lower positioning disc, a step groove is formed in the center of the lower positioning disc, a magnetic steel positioning chuck is mounted in the step groove, and clamping grooves for placing magnetic steel are uniformly formed in the inner side of the circumference of the magnetic steel positioning chuck; the upper positioning disc is located above the lower positioning disc, and the upper positioning disc and the lower positioning disc are assembled in a buckled mode through a connecting assembly. According to the utility model, the replaceable magnetic steel positioning chuck installed in the lower positioning disc can clamp and position a plurality of circumferentially distributed magnetic steels, the connecting assembly can realize the buckling action of the upper positioning disc and the lower positioning disc, and the magnetic steels and the stator iron core coated with glue are fully pressed, so that the magnetic steels and the stator iron core are convenient to transfer and bake, and the operation is simple and convenient. Therefore, the assembly relation among the parts is ensured to be accurate and unchanged, so that the yield of the stator is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of tooling, in particular to a magnetic steel patch tooling for an electromagnetic bearing stator. Background Technique

[0002] As a new type of support bearing that uses electromagnetic principles for magnetic levitation, the electromagnetic bearing is a high-performance bearing. It supports the load or suspends the rotor through magnetic field forces, thereby achieving rotation without mechanical contact. This type of bearing has many advantages, such as small mechanical wear, low energy consumption, low noise, long service life, no need for lubrication, no oil pollution, etc., and is especially suitable for special environments such as high speed, vacuum, and ultra-clean.

[0003] The structure of the electromagnetic bearing mainly includes an annular protective cover, a shaft sleeve, and a stator (the stator is composed of a stator core, a coil winding, and a magnetic steel). During the assembly of the stator, since the magnetic steels are distributed in a circumferential manner and the quantity is large, it is relatively difficult to paste the magnetic steels on the stator core with high precision according to requirements. Currently, the operation of pasting the magnetic steels on the stator core is through the line-drawing method, that is, first draw lines at the positions on the stator core where the magnetic steels are to be pasted, then apply glue to these positions, and then paste the magnetic steels one by one. Such a method is difficult to ensure the accuracy of the installation positions of the magnetic steels and is also prone to displacement during subsequent assembly. The deviation of the position accuracy of the magnetic steels will cause the magnetic field force not to act on the shaft sleeve in the designed direction. Since the rotor is assembled in the shaft sleeve, the force acting on the rotor will change, and the rotor will not be on the designed central axis during rotation, which easily causes the rotor to malfunction.

[0004] Therefore, in order to solve the above problems, a magnetic steel patch tooling for an electromagnetic bearing stator is proposed. Content of the Utility Model

[0005] The purpose of the utility model is to provide a magnetic steel patch tooling for an electromagnetic bearing stator, which can accurately position and install the magnetic steels during assembly, thereby solving the problems raised in the above background technique.

[0006] To achieve the above purpose, the utility model provides the following technical solutions:

[0007] Technical solution one: Provide a magnetic steel patch tooling for an electromagnetic bearing stator, including an upper positioning disk and a lower positioning disk. A stepped groove is opened at the center of the lower positioning disk, and a magnetic steel positioning chuck is installed in the stepped groove. The inner circumference of the magnetic steel positioning chuck is evenly provided with card slots for placing magnetic steels. The upper positioning disk is located above the lower positioning disk, and the upper positioning disk and the lower positioning disk are assembled by buckling through a connecting component.

[0008] Furthermore, a round platform for positioning the stator core is provided at the center of the lower surface of the upper positioning disk.

[0009] Specifically, the connecting assembly includes screws and threaded holes, the upper positioning plate and the magnetic steel positioning chuck are both provided with through holes, the lower positioning plate is provided with threaded holes, and the screws pass through the axially aligned through holes and are screwed together with the threaded holes.

[0010] Furthermore, the upper positioning plate, the magnetic steel positioning chuck and the lower positioning plate are all provided with pin holes, and pins are inserted into the axially aligned pin holes. The number of the through holes, threaded holes and pin holes is 4 and distributed in a circle, and the threaded holes and pin holes are staggered.

[0011] Technical solution 2, providing another magnetic steel patch tooling for electromagnetic bearing stator,

[0012] Specifically, the connecting assembly includes a torsion hinge and a hook. The number of the torsion hinges is two and they are symmetrically arranged. The leaves on the upper side of the torsion hinge are rotatably assembled with the upper positioning plate through a rotating seat, and the leaves on the lower side of the torsion hinge are rotatably assembled with the lower positioning plate through a rotating seat. The leaves on the upper side of the torsion hinge are fixedly installed with a hook, and a wedge block is provided on the side wall of the hook away from the rotating seat. A through slot is opened on the leaves on the lower side of the torsion hinge, and when the hook is extended into the through slot, the wedge block is engaged and assembled with the through slot.

[0013] Furthermore, the lower end of the hook extends downward to form a paddle.

[0014] Furthermore, the magnetic steel positioning chuck and the lower positioning plate are both provided with pin holes, a pin is fixedly installed on the lower side of the upper positioning plate, and a pin is inserted into the axially aligned pin holes, and the number of the pin holes is 4 and distributed in a circle.

[0015] The beneficial effect of the utility model is that a plurality of circumferentially distributed magnets can be clamped and positioned by a replaceable magnet positioning chuck installed in the lower positioning plate, and the connecting assembly can realize the snap-fitting action of the upper positioning plate and the lower positioning plate, so that the magnets coated with glue and the stator core are fully compressed, which is convenient for transfer and baking processing, and ensures that the assembly relationship between the various components is accurate and unchanged, thereby improving the yield of the stator. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic structural perspective view of the first embodiment of the utility model;

[0017] Figure 2 It is a schematic cross-sectional view of the structure of the lower positioning plate in the first embodiment of the utility model;

[0018] Figure 3 This is a schematic front view of the structure of the first embodiment of the utility model;

[0019] Figure 4It is the main structural schematic front view of the second embodiment of the present utility model;

[0020] Figure 5 It is the partial sectional view of the structure of the connecting component in the second embodiment of the present utility model.

[0021] In the figure: 1 lower positioning disk, 2 magnetic steel positioning chuck, 3 frustum, 4 upper positioning disk, 5 connecting component, 51 screw, 52 through hole, 53 threaded hole, 54 wedge block, 55 torsion hinge, 56 hook, 57 clamping groove, 58 dial, 6 clamping groove, 7 magnetic steel, 8 stator core, 9 stepped groove, 10 pin hole, 11 pin. Specific implementation manners

[0022] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0023] Embodiment 1

[0024] As Figure 1 , Figure 2 and Figure 3 shown, the present utility model provides a magnetic steel patching tooling for an electromagnetic bearing stator, including an upper positioning disk 4 and a lower positioning disk 1. A stepped groove 9 is provided at the center of the lower positioning disk 1. The stepped groove 9 is composed of a plurality of axially connected circular grooves. The diameter of the circular grooves decreases successively from top to bottom, and the stepped groove 9 axially penetrates the lower positioning disk 1.

[0025] A magnetic steel positioning chuck 2 is installed in the stepped groove 9. The magnetic steel positioning chuck 2 is detachably placed in the uppermost circular groove, and after placement, the upper surface of the magnetic steel positioning chuck 2 is flush with the upper surface of the lower positioning disk 1. A clamping groove 6 for placing the magnetic steel 7 is evenly provided on the inner circumference of the magnetic steel positioning chuck 2. All the magnetic steels 7 to be bonded are positioned through the clamping groove 6. The clamping groove 6 on the magnetic steel positioning chuck 2 can be customized according to the size and distribution of the magnetic steel 7, and adaptive adjustment is carried out by replacing the magnetic steel positioning chuck 2, so the application is more flexible.

[0026] The upper positioning disk 4 is located above the lower positioning disk 1. The upper positioning disk 4 and the lower positioning disk 1 are snap-fitted and assembled through a connecting component 5. The upper positioning disk 4 and the lower positioning disk 1 can be snap-fitted and installed through the connecting component 5, and the stator core 8 and the magnetic steel 7 are pressed and positioned.

[0027] Further, a frustum 3 for positioning the stator core 8 is integrally formed at the center of the lower surface of the upper positioning disk 4. After the frustum 3 is inserted into the inside of the stator core 8, the installation accuracy of the stator core 8 can be improved, and the installation error in the radial direction can be reduced.

[0028] As Figure 1 shown, the connecting component 5 includes a screw 51 and a threaded hole 53. The upper positioning disk 4 and the magnet positioning chuck 2 are both provided with through holes 52, and the lower positioning disk 1 is provided with a threaded hole 53. The screw 51 passes through the axially aligned through holes 52 and is screwed and assembled with the threaded hole 53; by installing and disassembling the screw 51, the buckling and splitting of the upper positioning disk 4 and the lower positioning disk 1 can be completed, and the installation error of the stator core 8 and the magnet positioning chuck 2 in the radial direction can also be reduced.

[0029] Further, the upper positioning disk 4, the magnet positioning chuck 2 and the lower positioning disk 1 are all provided with pin holes 10, and pins 11 are inserted into the axially aligned pin holes 10. The number of the through holes 52, the threaded holes 53 and the pin holes 10 is 4 and they are circumferentially distributed, and the threaded holes 53 and the pin holes 10 are staggeredly arranged; the connection method of installing the pins 11 at four points can pre-position the upper positioning disk 4, the stator core 8, the magnet positioning chuck 2 and the lower positioning disk 1, reduce the radial assembly error, and also facilitate the alignment of the through holes 52 and the threaded holes 53. Then, by the connection method of installing the screws 51 at four points, a uniform axial pressure can be applied to the stator core 8 and the magnet 7.

[0030] The working principle of this embodiment:

[0031] During assembly, first install the magnet positioning chuck 2 into the stepped groove 9, then install the magnet 7 into the card slot 6 and place it. After filling a full circle, drop the adhesive glue on the upper surface of the magnet 7;

[0032] One end of the stator core 8 after the coil winding is shaped is inserted and installed on the upper positioning disk 4 through the frustum 3, and the other end of the stator core 8 is pressed on the glue. Install the pin 11 first and then install the screw 51, which can ensure accurate positioning and sufficient pressing;

[0033] Finally, let the whole stand still for a period of time (10 minutes to 15 minutes), then put it into an oven for baking (10 minutes to 15 minutes, the temperature is 70 - 80 °C) to dry and shape the glue. After completion, take it out and stand still for another period of time (20 - 30 minutes), and disassemble the tooling to obtain the stator finished product of the electromagnetic bearing.

[0034] Embodiment Two

[0035] The difference between this embodiment and Embodiment One lies in the form of the connecting component 5, as Figure 4 and Figure 5As shown, the connecting assembly 5 includes a torsion hinge 55 and a hook 56. The torsion hinge 55 is an existing component composed of two hinged blades and a torsion spring and other structures. There are two torsion hinges 55 and they are symmetrically arranged, which will not affect the installation and disassembly of the stator core 8, the magnet 7 and the magnet positioning chuck 2.

[0036] The leaves on the upper side of the torsion hinge 55 are rotatably assembled with the upper positioning disk 4 through a rotating seat, and the leaves on the lower side of the torsion hinge 55 are rotatably assembled with the lower positioning disk 1 through a rotating seat. The leaves on the upper side of the torsion hinge 55 are fixedly installed with a hook 56, and a wedge block 54 is provided on the side wall of the hook 56 away from the rotating seat, and a through slot 57 is provided on the leaves on the lower side of the torsion hinge 55; the torsion hinge 55 has a torsion force to swing the two leaves away from each other through a torsion spring, so that the upper positioning disk 4 and the lower positioning disk 1 have a force to move away from each other and separate. On the contrary, pressing the upper positioning disk 4 can make the two leaves swing closer to each other, and when the hook 56 extends into the through slot 57, the wedge block 54 is snap-fitted and assembled with the through slot 57, so that the shape of the torsion hinge 55 can be limited, thereby fixing the distance between the upper positioning disk 4 and the lower positioning disk 1, and completing the pressing operation.

[0037] Furthermore, the lower end of the hook 56 extends downward to form a paddle 58, through which the hook 56 can be pushed closer to each other, so as to facilitate the separation of the wedge block 54 and the through groove 57, thereby releasing the restriction on the torque hinge 55, and the torque hinge 55 can be reset upward to the upper positioning plate 4 due to the torque.

[0038] Furthermore, both the magnetic steel positioning chuck 2 and the lower positioning plate 1 are provided with pin holes 10, and a pin 11 is fixedly installed on the lower side of the upper positioning plate 4. The pin 11 moves up and down with the upper positioning plate 4, and the pin 11 is inserted into the axially aligned pin holes 10. The number of the pin holes 10 is 4 and distributed in a circle; the connection method of four-point installation of the pin 11 can position the upper positioning plate 4, the stator core 8, the magnetic steel positioning chuck 2 and the lower positioning plate 1, thereby reducing the radial assembly error.

[0039] The working principle of this embodiment:

[0040] During assembly, first install the magnetic steel positioning chuck 2 into the step groove 9, and then install the magnetic steel 7 into the slot 6. After a full circle, drip adhesive glue on the upper surface of the magnetic steel 7.

[0041] After the coil winding is shaped, one end of the stator core 8 is installed on the upper positioning plate 4 through the truncated cone 3, and the other end of the stator core 8 is pressed on the glue by pressing the upper positioning plate 4 downward. At this time, the torsion hinge 55 is compressed until the wedge block 54 is snap-fitted with the through groove 57, and the pin 11 is gradually plugged and assembled with the pin hole 10, which can ensure accurate positioning and sufficient compression.

[0042] Finally, let it stand still for a period of time (10 minutes to 15 minutes), then put it into an oven for baking (10 minutes to 15 minutes, at a temperature of 70 to 80 °C) to dry and shape the glue. After completion, take it out and let it stand still for another period of time (20 to 30 minutes), and then disassemble the tooling to obtain the finished stator of the electromagnetic bearing.

[0043] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present utility model, the present utility model can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present utility model. Any reference signs in the claims should not be construed as limiting the claims involved.

[0044] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A magnetic steel patch tool for an electromagnetic bearing stator, characterized in that: It comprises an upper positioning plate (4) and a lower positioning plate (1), wherein a step groove (9) is provided at the center of the lower positioning plate (1), a magnetic steel positioning chuck (2) is installed in the step groove (9), and slots (6) for placing magnetic steel (7) are evenly provided on the inner side of the circumference of the magnetic steel positioning chuck (2); The upper positioning plate (4) is located above the lower positioning plate (1), and the upper positioning plate (4) and the lower positioning plate (1) are snap-fitted and assembled via a connecting assembly (5).

2. The magnetic steel patch tooling for an electromagnetic bearing stator according to claim 1, characterized in that: A truncated table (3) for positioning the stator core (8) is provided at the center of the lower surface of the upper positioning plate (4).

3. The magnetic steel patch tooling for electromagnetic bearing stator according to claim 1, characterized in that: The connecting assembly (5) comprises a screw (51) and a threaded hole (53); the upper positioning plate (4) and the magnetic steel positioning chuck (2) are both provided with a through hole (52); the lower positioning plate (1) is provided with a threaded hole (53); the screw (51) passes through the axially aligned through hole (52) and is threadedly assembled with the threaded hole (53).

4. The magnetic steel patch tooling for electromagnetic bearing stator according to claim 3 is characterized in that: The upper positioning plate (4), the magnetic steel positioning chuck (2) and the lower positioning plate (1) are all provided with pin holes (10), and pins (11) are inserted into the axially aligned pin holes (10). The number of the through holes (52), the threaded holes (53) and the pin holes (10) are all four and are distributed in a circular pattern. The threaded holes (53) and the pin holes (10) are staggered.

5. The magnetic steel patch tooling for electromagnetic bearing stator according to claim 1, characterized in that: The connecting assembly (5) comprises a torsion hinge (55) and a hook (56). The torsion hinges (55) are two in number and are symmetrically arranged. The leaf pieces on the upper side of the torsion hinge (55) are rotatably assembled with the upper positioning plate (4) via a rotating seat, and the leaf pieces on the lower side of the torsion hinge (55) are rotatably assembled with the lower positioning plate (1) via a rotating seat. The leaf pieces on the upper side of the torsion hinge (55) are fixedly mounted with the hook (56). A wedge block (54) is arranged on a side wall of the hook (56) away from the rotating seat. A through slot (57) is provided on the leaf pieces on the lower side of the torsion hinge (55). When the hook (56) extends into the through slot (57), the wedge block (54) is engaged and assembled with the through slot (57).

6. The magnetic steel patch tooling for electromagnetic bearing stator according to claim 5, characterized in that: The lower end of the hook (56) extends downward to form a paddle (58).

7. The magnetic steel patch tooling for electromagnetic bearing stator according to claim 6, characterized in that: The magnetic steel positioning chuck (2) and the lower positioning plate (1) are both provided with pin holes (10), a pin (11) is fixedly mounted on the lower side of the upper positioning plate (4), the pin (11) is inserted into the axially aligned pin holes (10), and the number of the pin holes (10) is four and they are distributed in a circular pattern.

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