Mounting method for surface-mounted magnetic steel

Abstract

The invention discloses a mounting method for surface-mounted magnetic steel. A simple and easy method is provided for surface-mounting magnetic steel on a rotor core which is smooth in outer surface and free of magnetic steel positioning. A first annular steel sleeve (3) is sleeved on a motor rotating shaft and a rotor iron core (2) at the bottom end of the vertically arranged rotor iron core; an inter-magnetic-pole axial partition filler strip (6) is inserted between the inner side vertical face of a first annular steel sleeve (3) and the outer side vertical face of a motor rotating shaft and a rotor iron core (2), uniform magnetic steel is adjusted to be inserted into a positioning space, and a positioning jackscrew is installed in a corresponding jackscrew through hole (8) in the first annular steel sleeve (3) on the outer side of the inter-magnetic-pole axial partition filler strip (6). The positioning jackscrew is tightly propped against the axial segmentation filler strip between the magnetic poles; a first ring of magnetic steel (7) is sequentially inserted and surface-mounted between the inner side vertical surface of the first annular steel sleeve and the outer side vertical surface of the rotor iron core; and outward bouncing of the magnetic steel in the axial direction and the radial direction during installation can be effectively avoided.

Description

Technical Field

[0001] The invention relates to a permanent magnet motor rotor, and in particular to a surface-mounted magnetic steel installation method on a permanent magnet motor rotor core. Background Art

[0002] At present, there are two main installation methods for permanent magnet motor rotor core magnets, one is surface mounting and the other is embedded. The installation process of embedded magnets is relatively easy, requires less tooling, and has a lower installation risk. However, the installation of surface-mounted magnets requires more tooling, is more difficult to install, and has a higher risk factor. During the installation of surface-mounted magnets, there is not only the risk of axial magnet outward springing, but also the danger of radial magnet outward squeezing, especially when the outer surface of the rotor core is a smooth surface, and there is neither a magnet positioning groove nor a magnet positioning hole on the outer surface of the rotor core, which will make the installation and positioning of the magnets very difficult. It often happens that when the magnets are surface mounted, they cannot be completely attached to the outer surface of the rotor core, causing the circumferential surface of the magnets to bulge after assembly, affecting the uniformity of the air gap between the stator and the rotor. In addition, after the magnets are assembled, they need to be tied and fixed with a non-weft tape. How to ensure that the magnets are tightly attached to the surface of the rotor core when the non-weft tape is used to tie the magnets is also a difficult problem that needs to be solved at the assembly site. Summary of the invention

[0003] The present invention provides a surface-mounted magnetic steel installation method, which provides a simple and easy method for surface-mounting magnetic steel on a rotor core whose outer surface is a smooth surface and has no magnetic steel positioning.

[0004] The present invention solves the above technical problems through the following technical solutions: A method for installing a surface-mounted magnetic steel comprises a wooden pile pad, an annular steel sleeve and a magnetic steel, wherein a motor shaft and a rotor core are vertically placed on the wooden pile pad, and top screw through holes are evenly distributed along the circumferential direction on the annular steel sleeve, and the method comprises the following steps: The first step is to install the lower end positioning annular plate at the bottom end of the vertically placed rotor core by means of lower end screws; Step 2: Sleeve the first annular steel sleeve onto the motor shaft and the rotor core from top to bottom, and support the first annular steel sleeve on the top surface of the lower end positioning annular plate; The third step is to insert the inter-pole axial splitting gasket between the inner side elevation of the first annular steel sleeve and the outer side elevation of the motor shaft and the rotor core, adjust the uniform magnetic steel to insert into the positioning space, and install the positioning top screw into the corresponding top screw through hole on the first annular steel sleeve outside the inter-pole axial splitting gasket, so that the positioning top screw and the inter-pole axial splitting gasket are pressed tightly to realize the accurate positioning and fixation of the first annular steel sleeve; Step 4: insert the first circle of magnetic steel in sequence and attach it between the inner side surface of the first annular steel sleeve and the outer side surface of the rotor core; Step 5. After the first circle of magnetic steel is surface mounted, remove the positioning screws on the outside of the axial dividing pads between the magnetic poles in the third step, and then raise the first annular steel sleeve upward along the axial direction of the motor. The raised distance is one-third of the height of the first circle of magnetic steel. Then, install the positioning screws into the screw through holes, and fix the position of the raised first annular steel sleeve firmly by rotating the positioning screws. Step 6: Sleeve the second annular steel sleeve on the motor shaft, the rotor core and the axial splitting pads between the magnetic poles from top to bottom, install the positioning screws in the screw through holes on the second annular steel sleeve, and connect the positioning screws to the axial splitting pads between the magnetic poles to achieve the positioning adjustment of the magnetic steel surface mounting space in the second annular steel sleeve, and form an observation annular gap between the second annular steel sleeve and the first annular steel sleeve, and insert the second circle of magnetic steel surface mounting in sequence; Step 7. Repeat step 6 repeatedly to complete the surface mounting of the third circle of magnets on the rotor core until all the magnets are mounted. Finally, crimp the upper positioning annular plate of the core onto the uppermost circle of magnets and fix the upper positioning annular plate with screws.

[0005] After each circle of magnetic steel is surface-mounted, a positioning screw is installed in the screw through hole on the annular steel sleeve arranged outside the circle of magnetic steel. By rotating the positioning screw, the circle of magnetic steel and the surface of the iron core are connected and adjusted so that the circle of magnetic steel is on the same circumferential outer circle.

[0006] After all the magnets are surface mounted, lay the motor shaft and rotor core flat on the workbench, and use a flat tape to tie up the first circle of magnets exposed outside the first annular steel sleeve. Then, from the first annular steel sleeve to the last one, tie up the flat tape while removing the annular steel sleeves. Finally, tie up all the magnets on the motor shaft and rotor core.

[0007] The present invention is particularly suitable for surface-mounted magnet installation without any magnet positioning on the surface of the iron core, which can effectively avoid the external bounce in the axial and radial directions during the installation of the magnet, and well solves the risk of axial and radial external bounce of the magnet; it greatly shortens the installation time of the magnet, significantly improves the production efficiency, and greatly reduces the labor intensity. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a schematic diagram of the structure of the present invention when the first circle of magnetic steel 7 is surface-mounted; Figure 2 It is a schematic diagram of the structure of the present invention when the second circle of magnetic steel 11 is surface mounted; Figure 3It is a schematic diagram of the structure after all the magnetic steels on the outer surface of the iron core of the present invention are surface-mounted. DETAILED DESCRIPTION

[0009] The present invention is described in detail below in conjunction with the accompanying drawings: A method for installing a surface-mounted magnetic steel comprises a wooden pile pad 1, an annular steel sleeve and a magnetic steel. A motor shaft and a rotor core 2 are vertically placed on the wooden pile pad 1. The wooden pile pad 1 is generally provided in three pieces. After vertical placement, the outer side of the lower end of the rotor core is supported on the top surface of the three wooden pile pads 1 to facilitate the surface mounting of the magnetic steel. Top screw through holes 8 are evenly distributed along the circumferential direction on the annular steel sleeve. The top screw through holes 8 are arranged at equal intervals of arc on the outer side elevation of the annular steel sleeve. Two circles of top screw through holes 8 can also be arranged on the outer side elevation of the annular steel sleeve. The magnetic steel surface mounting process is as follows: The first step is to install the lower end positioning annular plate 4 at the bottom end of the vertically placed rotor core through the lower end screws 5 to form the bottom end support for the first circle of magnetic steel 7 and the first annular steel sleeve 3; Step 2: Sleeve the first annular steel sleeve 3 onto the motor shaft and the rotor core 2 from top to bottom, and support the first annular steel sleeve 3 on the top surface of the lower end positioning annular plate 4; The third step is to insert the inter-pole axial splitting gasket strip 6 between the inner side elevation of the first annular steel sleeve 3 and the outer side elevation of the motor shaft and the rotor core 2, adjust the uniform magnetic steel insertion positioning space, and install the positioning top screw into the corresponding top screw through hole 8 on the first annular steel sleeve 3 outside the inter-pole axial splitting gasket strip 6, so that the positioning top screw and the inter-pole axial splitting gasket strip 6 are pressed tightly, so as to realize the accurate positioning and fixation of the first annular steel sleeve 3, so as to realize the positioning and fixation of the first circle of magnetic steel 7; Step 4: insert the first circle of magnetic steel 7 in sequence and attach it between the inner side elevation of the first annular steel sleeve 3 and the outer side elevation of the rotor core. The pre-adjustment and positioning of the first annular steel sleeve 3 ensures that the magnetic steels in the first circle of magnetic steel 7 are inserted and attached in place. Step 5. After the first circle of magnetic steel 7 is surface-mounted, remove the positioning screw on the outside of the axial dividing pad 6 between the magnetic poles in the third step, and then raise the first annular steel sleeve 3 upward along the axial direction of the motor. The raised distance is one-third of the height of the first circle of magnetic steel 7. Then, install the positioning screw into the screw through hole 8, and fix the raised first annular steel sleeve 3 firmly by rotating the positioning screw. The first annular steel sleeve 3 is raised to one-third of the height of the first circle of magnetic steel 7 for two purposes. The first function is to position the second circle of magnetic steel when surface-mounted, and the second function is to make room for tying the latitude-free belt on the surface-mounted magnetic steel later. Step 6: Sleeve the second annular steel sleeve 11 on the motor shaft, the rotor core 2 and the axially divided gasket strips 6 between the magnetic poles from top to bottom, install the positioning screw in the screw through hole 8 on the second annular steel sleeve 12, and connect the positioning screw to the axially divided gasket strips 6 between the magnetic poles to achieve the positioning adjustment of the magnetic steel surface-mounted space in the second annular steel sleeve 11, and form an observation annular gap 9 between the second annular steel sleeve 11 and the first annular steel sleeve 3, insert the second circle of magnetic steel 10 in sequence, and observe the annular gap 9 to observe the surface-mounted conditions of each magnetic steel in the second circle of magnetic steel 11, so as to facilitate its adjustment; Step 7. Repeat step 6 repeatedly to complete the surface mounting of the third circle of magnetic steels on the rotor core until all the magnetic steels are mounted on the rotor core. Finally, crimp the upper end positioning annular plate 12 of the core onto the uppermost circle of magnetic steels and fix the upper end positioning annular plate 12 of the core with screws 13.

[0010] After each circle of magnetic steel is pasted on the surface, a positioning screw can be installed in the screw through hole 8 on the annular steel sleeve arranged on the outside of the circle of magnetic steel. By rotating the positioning screw, the fit between each magnetic steel in the circle of magnetic steel and the surface of the iron core can be adjusted so that the circle of magnetic steel is on the same circumferential outer circle.

[0011] After all the magnetic steels are surface-mounted, lay the motor shaft and rotor core 2 flat on the workbench, and use a non-weft tape to tie up the first circle of magnetic steel 7 exposed outside the first annular steel sleeve 3. Then, from the first annular steel sleeve 3 to the last annular steel sleeve, tie up the non-weft tape while removing the annular steel sleeves. Finally, tie up all the magnetic steels on the motor shaft and rotor core 2. This non-weft tape tying procedure ensures that the surface-mounted magnetic steels do not move or misalign.

Claims

1. A method for installing a surface mounted magnetic steel, comprising a wooden pile block (1), an annular steel sleeve and a magnetic steel, wherein a motor shaft and a rotor core (2) are vertically placed on the wooden pile block (1), and top screw through holes (8) are evenly distributed along the circumferential direction on the annular steel sleeve, characterized by the following steps: The first step is to install a lower end positioning annular plate (4) at the bottom end of the vertically placed rotor core by means of lower end screws (5); Step 2: Sleeve the first annular steel sleeve (3) onto the motor shaft and the rotor core (2) from top to bottom, and support the first annular steel sleeve (3) on the top surface of the lower end positioning annular plate (4); The third step is to insert the inter-pole axial splitting gasket (6) between the inner side elevation of the first annular steel sleeve (3) and the outer side elevation of the motor shaft and the rotor core (2), adjust the uniform magnetic steel insertion positioning space, and install the positioning top screw into the corresponding top screw through hole (8) on the first annular steel sleeve (3) outside the inter-pole axial splitting gasket (6), so that the positioning top screw and the inter-pole axial splitting gasket (6) are pressed tightly, so as to realize the accurate positioning and fixing of the first annular steel sleeve (3); Step 4: insert the first circle of magnetic steel (7) in sequence and attach it between the inner side surface of the first annular steel sleeve (3) and the outer side surface of the rotor core; Step 5. After the surface mounting of the first circle of magnetic steel (7) is completed, the positioning screw on the outer side of the axial dividing pad (6) between the magnetic poles in the third step is removed, and then the first annular steel sleeve (3) is raised upward along the axial direction of the motor, and the raised distance is one third of the height of the first circle of magnetic steel (7). Then, the positioning screw is installed in the screw through hole (8), and the raised first annular steel sleeve (3) is firmly fixed by rotating the positioning screw; Step 6: The second annular steel sleeve (11) is sleeved on the motor shaft and the rotor core (2) and the axially split gasket strips (6) between the magnetic poles from top to bottom, and a positioning screw is installed in the screw through hole (8) on the second annular steel sleeve (12), and the positioning screw is connected to the axially split gasket strips (6) between the magnetic poles to achieve positioning adjustment of the magnetic steel surface mounting space in the second annular steel sleeve (11), and an observation annular gap (9) is formed between the second annular steel sleeve (11) and the first annular steel sleeve (3), and the second circle of magnetic steel (10) is inserted in sequence; Step 7: Repeat step 6 repeatedly to complete the surface mounting of the third and subsequent magnetic steels on the rotor core until all the magnetic steels are mounted on the rotor core. Finally, crimp the core top positioning annular plate (12) onto the topmost magnetic steel circle and fix the core top positioning annular plate (12) with screws (13).

2. A surface mount magnetic steel installation method according to claim 1, characterized in that: After each circle of magnetic steel is pasted on the surface, a positioning screw is installed in a screw through hole (8) on the annular steel sleeve arranged outside the circle of magnetic steel, and the positioning screw is rotated to achieve the top connection and adjustment of the circle of magnetic steel and the surface of the iron core, so that the circle of magnetic steel is on the same circumferential outer circle.

3. A surface mounted magnetic steel installation method according to claim 1 or 2, characterized in that: After all the magnets are surface mounted, the motor shaft and rotor core (2) are laid flat on a workbench, and the first circle of magnets (7) exposed outside the first annular steel sleeve (3) is tied with a non-weft tape. Then, from the first annular steel sleeve (3) to the last annular steel sleeve, the non-weft tape is tied while the annular steel sleeves are removed. Finally, all the magnets on the motor shaft and rotor core (2) are tied.

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