Permanent magnet motor rotor shaft

Abstract

The utility model relates to the technical field of permanent magnet motors, in particular to a permanent magnet motor rotor shaft which comprises a rotor center shaft, an iron core body and magnetic steel, a first supporting plate and a second supporting plate are fixedly connected to the outer side of the rotor center shaft, and the first supporting plate and the second supporting plate are both provided with hoisting holes. Positioning grooves are formed in the opposite outer sides of the two first supporting plates, limiting digging grooves are formed in the left side and the right side of each first supporting plate and the left side and the right side of each second supporting plate, and the first supporting plates are connected with positioning protruding blocks in a sliding mode through the positioning grooves. Through the arrangement of the first supporting plate, the second supporting plate, the positioning grooves, the limiting digging grooves, the positioning protruding blocks, the steel grooves, the first pressing plate, the second pressing plate and the check blocks, the problems of falling apart of rotor punching sheets and rebounding of magnetic steel in the assembling process can be avoided, and the assembling efficiency of rotors can be effectively improved; and the firm rotor structure can effectively prolong the service life of the rotor and reduce the maintenance cost.

Description

Technical Field

[0001] The utility model relates to the technical field of permanent magnet motors, in particular to a permanent magnet motor rotor shaft. Background Art

[0002] Permanent magnet motor direct drive can change the traditional backward mechanical equipment transmission mode, and it has obvious advantages over other motors. At present, heavy mechanical equipment such as ball mills mainly use asynchronous motors, reducers and large and small open gears for transmission mode, but this driving mode consumes huge energy, has a complex structure and is difficult to maintain. At present, research in the field of permanent magnet motors for ball mills has achieved remarkable results, and a series of high-performance permanent magnet motor products for ball mills have begun to enter the market.

[0003] Permanent magnet motors for ball mills have significant advantages in energy saving, environmental protection, reliability, etc. Since permanent magnet motors used in ball mills need to have strong magnetism, magnets with strong magnetism need to be installed in the rotor. However, during the installation of magnets on some existing permanent magnet motor rotor shafts, the rotor punchings are very likely to fall apart due to the repulsion of like poles, and the magnets are very likely to rebound when installed, which greatly reduces the assembly efficiency of the rotor. Therefore, a permanent magnet motor rotor shaft is proposed to address the above problems. Utility Model Content

[0004] The utility model aims to provide a permanent magnet motor rotor shaft to solve the problem that in the process of installing magnetic steel, the rotor punchings of some existing permanent magnet motor rotor shafts are very likely to fall apart due to the repulsion of the same poles, and the magnetic steel is very likely to rebound when the magnetic steel is installed, which greatly reduces the assembly efficiency of the rotor.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A permanent magnet motor rotor shaft comprises a rotor central axis, an iron core body and magnetic steel, wherein a first support plate and a second support plate are fixedly connected to the outer side of the rotor central axis, the first support plate and the second support plate are both provided with lifting holes, positioning grooves are provided on the relatively outer sides of the two first support plates, the left and right sides of the first support plate and the second support plate are both provided with limiting grooves, the first support plates are both slidably connected with positioning protrusions through the positioning grooves, the interior of the iron core body is fixedly connected with positioning protrusions, the exterior of the iron core body is provided with a steel groove, a first pressing plate is welded to the right side of the iron core body, a second pressing plate is bolted to the left side of the iron core body, the iron core body is slidably connected with the magnetic steel through the steel groove, and a stopper is bolted to the left side of the second pressing plate.

[0007] Preferably, the central axis of the rotor is a cylindrical structure, there are two first support plates, there are four second support plates, there are six groups of lifting holes, and each group of lifting holes has two.

[0008] Preferably, there are two positioning grooves, and there are two groups of limiting grooves, each group of limiting grooves has two, and both the positioning grooves and the limiting grooves are rectangular grooves.

[0009] Preferably, the core body is a circular tubular structure, there are two positioning protrusions, and both positioning protrusions are rectangular blocks.

[0010] Preferably, there are multiple steel grooves, magnetic steels and blocks, the number of steel grooves, magnetic steels and blocks is the same, the steel grooves are all "T"-shaped grooves, the magnetic steels are all "I"-shaped structures, and the blocks are all "L"-shaped blocks.

[0011] Preferably, the first pressure plate and the second pressure plate are both annular structures, the inner diameters of the first pressure plate and the second pressure plate are the same, the outer diameter of the first pressure plate is the same as the outer diameter of the core body, and the outer diameter of the second pressure plate is smaller than the outer diameter of the core body.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] In the utility model, by setting the first support plate, the second support plate, the positioning groove, the limiting groove, the positioning protrusion block, the steel groove, the first pressure plate, the second pressure plate and the stop block, the device can avoid the problems of the rotor punchings falling apart and the magnetic steel rebounding during the assembly process, and can effectively improve the assembly efficiency of the rotor. The firm rotor structure can effectively increase the life of the rotor and reduce maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the structure of the rotor shaft unit of the utility model;

[0016] Figure 3 This is a schematic diagram of the rotor core structure of the utility model;

[0017] Figure 4 This is a cross-sectional view of the installation structure of the pressure plate of the utility model;

[0018] Figure 5 This is a schematic diagram of the magnetic steel structure of the utility model;

[0019] Figure 6 This is a schematic diagram of the stopper structure of the utility model.

[0020] In the figure: 1. rotor central axis; 2. first support plate; 3. second support plate; 4. lifting hole; 5. positioning groove; 6. limiting groove; 7. core body; 8. positioning protrusion block; 9. steel groove; 10. first pressure plate; 11. second pressure plate; 12. magnetic steel; 13. stop block. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] In the description of the present utility model, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present utility model; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0023] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the utility model.

[0024] See also Figure 1-6 , the utility model provides a technical solution:

[0025] A permanent magnet motor rotor shaft comprises a rotor central axis 1, an iron core body 7 and a magnetic steel 12, wherein a first support plate 2 and a second support plate 3 are fixedly connected to the outer side of the rotor central axis 1, the first support plate 2 and the second support plate 3 are both provided with a lifting hole 4, positioning grooves 5 are provided on the relative outer sides of the two first support plates 2, the left and right sides of the first support plate 2 and the second support plate 3 are both provided with a limiting groove 6, the first support plates 2 are both slidably connected with a positioning protrusion block 8 through the positioning groove 5, the interior of the iron core body 7 is fixedly connected with the positioning protrusion block 8, the exterior of the iron core body 7 is provided with a steel groove 9, a first pressing plate 10 is welded to the right side of the iron core body 7, a second pressing plate 11 is bolted to the left side of the iron core body 7, the iron core body 7 is slidably connected with the magnetic steel 12 through the steel groove 9, and a stopper 13 is bolted to the left side of the second pressing plate 11.

[0026] The rotor central axis 1 is a cylindrical structure, the first support plates 2 have two, the second support plates 3 have four, the lifting holes 4 have six groups, each group of lifting holes 4 has two, and the rotor central axis 1, the first support plate 2, and the second support plate 3 can be lifted; there are two positioning grooves 5, there are two groups of limiting grooves 6, each group of limiting grooves 6 has two, the positioning grooves 5 and the limiting grooves 6 are both rectangular grooves, which can prevent the rotor central axis 1 and the core body 7 from relative displacement; the core body 7 is a circular tubular structure, there are two positioning protrusions 8, the positioning protrusions 8 are all rectangular blocks, and the positioning protrusions 8 can be positioned through the positioning grooves 5 and the first A support plate 2 is slidably connected; there are multiple steel grooves 9, magnetic steels 12 and blocks 13, and the number of steel grooves 9, magnetic steels 12 and blocks 13 is the same. The steel grooves 9 are all "T"-shaped grooves, the magnetic steels 12 are all "I"-shaped structures, and the blocks 13 are all "L"-shaped blocks. The magnetic steels 12 can be locked in the steel groove 9 through the blocks 13; the first pressure plate 10 and the second pressure plate 11 are both annular structures, the inner diameters of the first pressure plate 10 and the second pressure plate 11 are the same, the outer diameter of the first pressure plate 10 is the same as the outer diameter of the core body 7, the outer diameter of the second pressure plate 11 is smaller than the outer diameter of the core body 7, and the second pressure plate 11 will not block the left opening of the steel groove 9.

[0027] Working process: The rotor central axis 1, the first support plate 2, the second support plate 3, the lifting hole 4, the positioning groove 5, and the limit groove 6 of the device together constitute the rotor shaft unit. The core body 7, the positioning protrusion block 8, and the steel groove 9 of the device together constitute the rotor core. The first support plate 2 and the second support plate 3 of the device are pre-welded to the outside of the rotor central axis 1. Before assembly, check whether each component is intact. If it is intact, first weld the first pressure plate 10 to the right side of the core body 7, and then slide through the positioning groove 5 on the outside of the first support plate 2. Connect the positioning protrusion 8 on the inner side of the core body 7 to allow the rotor center axis 1 to pass through the core body 7 and the first pressure plate 10 from left to right. The positioning groove 5 and the positioning protrusion 8 can prevent the rotor center axis 1 and the core body 7 from rotating relative to each other. After the rotor center axis 1 is installed in place, the limiting groove 6 on the right side of the first support plate 2 and the second support plate 3 fits with the inner side of the first pressure plate 10. At this time, the right side opening of the steel groove 9 is blocked by the first pressure plate 10. Then, the second pressure plate 11 is sleeved on the outside of the rotor center axis 1 from the left side so that the inner side of the second pressure plate 11 The first support plate 2 and the second support plate 3 are fitted with the limiting groove 6 on the left side, so that the bolt connection hole of the second pressing plate 11 is aligned with the bolt connection hole on the left side of the core body 7. At this time, the left opening of the steel groove 9 is exposed, and the magnetic steel 12 is slidably connected to the outside of the core body 7 through the steel groove 9. Each time a magnetic steel 12 is installed on the core body 7, a stopper 13 is bolted to the second pressing plate 11. The stopper 13, the second pressing plate 11 and the core body 7 can be fixed by connecting the bolts. The left opening of the steel groove 9 is fixed by the stopper 13. The magnetic steel 12 can be fixed by sealing, and all the magnetic steels 12 can be installed on the outside of the core body 7 in turn to complete the assembly of the device. The device can produce products of various sizes. If the product size is large, the rotor center axis 1 can be hoisted as a whole through the hoisting hole 4 to facilitate the movement of the rotor center axis 1. The device can avoid the disintegration of the rotor punching and the rebound of the magnetic steel 12 during the assembly process, and can effectively improve the assembly efficiency of the rotor. The solid rotor structure can effectively increase the life of the rotor and reduce maintenance costs.

[0028] The contents not described in detail in this specification belong to the prior art known to the professional and technical personnel in this field. The standard parts used in this utility model can be purchased from the market, and the special-shaped parts can be customized according to the description and the drawings. The specific connection methods of each part adopt the conventional means such as bolts, rivets, welding, etc. in the prior art. The machinery, parts and equipment all adopt the conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be described in detail here.

[0029] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A permanent magnet motor rotor shaft, comprising a rotor central shaft (1), an iron core body (7) and a magnetic steel (12), characterized in that: The outer side of the rotor central axis (1) is fixedly connected with a first support plate (2) and a second support plate (3), the first support plate (2) and the second support plate (3) are both provided with a lifting hole (4), the relative outer sides of the two first support plates (2) are both provided with a positioning groove (5), the left and right sides of the first support plate (2) and the second support plate (3) are both provided with a limiting groove (6), the first support plate (2) is slidably connected with a positioning protrusion block (8) through the positioning groove (5), the interior of the core body (7) is fixedly connected with a positioning protrusion block (8), the outside of the core body (7) is provided with a steel groove (9), the right side of the core body (7) is welded with a first pressing plate (10), the left side of the core body (7) is bolted with a second pressing plate (11), the core body (7) is slidably connected with a magnetic steel (12) through the steel groove (9), and the left side of the second pressing plate (11) is bolted with a stopper (13).

2. A permanent magnet motor rotor shaft according to claim 1, characterized in that: The rotor central axis (1) is a cylindrical structure, there are two first support plates (2), there are four second support plates (3), there are six groups of lifting holes (4), and each group of lifting holes (4) has two.

3. The permanent magnet motor rotor shaft according to claim 1, characterized in that: There are two positioning grooves (5), and there are two groups of limiting grooves (6), each group of limiting grooves (6) has two, and both the positioning grooves (5) and the limiting grooves (6) are rectangular grooves.

4. The permanent magnet motor rotor shaft according to claim 1, characterized in that: The iron core body (7) is a circular tubular structure, and there are two positioning protrusion blocks (8), and both of the positioning protrusion blocks (8) are rectangular blocks.

5. The permanent magnet motor rotor shaft according to claim 1, characterized in that: There are a plurality of the steel grooves (9), magnetic steels (12) and stoppers (13), and the number of the steel grooves (9), magnetic steels (12) and stoppers (13) is the same; the steel grooves (9) are all "T"-shaped grooves, the magnetic steels (12) are all "I"-shaped structures, and the stoppers (13) are all "L"-shaped blocks.

6. The permanent magnet motor rotor shaft according to claim 1, characterized in that: The first pressing plate (10) and the second pressing plate (11) are both annular structures, the inner diameters of the first pressing plate (10) and the second pressing plate (11) are the same, the outer diameter of the first pressing plate (10) is the same as the outer diameter of the core body (7), and the outer diameter of the second pressing plate (11) is smaller than the outer diameter of the core body (7).

Images