Rotor punching sheet of permanent magnet generator

Abstract

The utility model relates to a rotor punching sheet of a permanent magnet generator, in particular to the technical field of permanent magnet generator equipment. The rotor punching sheet comprises the punching sheet body, the rotating shaft groove, the rotating shaft flat key groove, the first magnetic pole groove and the second magnetic pole groove, and the two salient points are designed in the middle of the magnetic pole groove, so that the magnets are convenient to install, and the performance of the whole rotor can be effectively improved when the two magnets are installed, and the first magnetic pole groove and the second magnetic pole groove are arranged side by side. More permanent magnets can be installed on the rotor, so that the overall power performance of the permanent magnet generator is further improved, the length of the rotor generator in the design scheme is greatly shortened in practical application, and the manufacturing cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of permanent magnet generator equipment, in particular to a permanent magnet generator rotor punching sheet. Background Art

[0002] Traditional permanent magnet generators have problems in design, such as low efficiency, low overall power performance, and large size. In order to improve the performance of permanent magnet generators, it is necessary to improve the structure of the rotor punching to improve the magnetic circuit efficiency and reduce the manufacturing cost. Utility Model Content

[0003] (1) Technical solution

[0004] In order to solve the above technical problems, the utility model provides a permanent magnet generator rotor punching sheet, including a punching sheet body, a shaft groove, a shaft flat key groove, a first magnetic pole groove, and a second magnetic pole groove. The center of the punching sheet body is provided with the shaft groove for installing the shaft, and the shaft flat key groove is provided on the shaft groove. A plurality of groups of magnetic pole grooves are provided on the punching sheet body, and each group of magnetic pole grooves includes a first magnetic pole groove and a second magnetic pole groove. The first magnetic pole groove and the second magnetic pole groove are provided with inwardly protruding convex points in the middle of the top and bottom, and the second magnetic pole groove is provided with outwardly extending triangular grooves on both sides.

[0005] Preferably, screw holes and rivet grooves are sequentially provided on the punch body along the periphery of the rotating shaft groove from the inside to the outside.

[0006] Preferably, the number of the screw holes is 4 and they are arranged in a rectangular distribution.

[0007] Preferably, the number of the rivet slots is 4 and they are arranged in a rectangular distribution.

[0008] Preferably, the number of the magnetic pole slots is four groups and they are evenly distributed on the punching sheet body, and a rotor electric welding point is provided on the edge of the punching sheet body corresponding to between every two groups of magnetic pole slots.

[0009] Preferably, the first magnetic pole slot and the second magnetic pole slot are arranged side by side.

[0010] (2) Beneficial effects

[0011] The utility model provides a permanent magnet generator rotor punching sheet. Compared with the prior art, the utility model has the following beneficial effects:

[0012] 1. Inwardly protruding bumps are provided in the middle of the top and bottom of the first and second magnetic pole slots. Considering the length of the magnetic pole and the fragility of the permanent magnet, it is not suitable to make a whole magnet and embed it in the magnetic pole slot. Therefore, two bumps are designed in the middle of the magnetic pole slot. One is to facilitate the installation of the magnet, and the other is that when the two magnets are installed in this way, the performance of the entire rotor can be effectively improved.

[0013] 2. By arranging the first magnetic pole slot and the second magnetic pole slot side by side, more permanent magnets can be installed on the rotor, thereby further improving the overall power performance of the permanent magnet generator. The four-pole permanent magnet generator rotor in this design is superior to the structural design of the traditional permanent magnet generator rotor. In practical applications, the length of the rotor generator of this design is greatly shortened, reducing the manufacturing cost.

[0014] 3. Both sides of the second magnetic pole slot are provided with triangular slots extending outward, which can effectively improve the performance of the rotor. Generally, when a permanent magnet generator is connected to a resistive load and fully loaded, a voltage drop of more than 5% will occur at the general voltage. With such a setting, when the resistive load is running, the voltage basically does not fluctuate, and the voltage may even increase. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the structure of Example 1 of the utility model.

[0016] Figure 2 This is a schematic diagram of the structure of Example 2 of the utility model.

[0017] The figures are marked as: 1-shaft slot, 2-shaft flat key slot, 3-screw hole, 4-rivet slot, 5-first magnetic pole slot, 6-second magnetic pole slot, 7-bump, 8-triangular slot, 9-rotor electric welding point. DETAILED DESCRIPTION

[0018] The utility model is further described in conjunction with the accompanying drawings and embodiments.

[0019] Example 1

[0020] like Figure 1As shown, a permanent magnet generator rotor punching sheet described in the utility model comprises a punching sheet body, a shaft slot 1, a shaft flat key slot 2, a first magnetic pole slot 5, and a second magnetic pole slot 6. The center of the punching sheet body is provided with the shaft slot 1 for installing the shaft, and the shaft flat key slot 2 is provided on the shaft slot 1. The punching sheet body is provided with a plurality of groups of magnetic pole slots, each group of magnetic pole slots comprises a first magnetic pole slot 5 and a second magnetic pole slot 6. The middle of the top and the bottom of the first magnetic pole slot 5 and the second magnetic pole slot 6 are provided with a convex point 7 protruding inwardly. Considering the length of the magnetic pole and the fragility of the permanent magnet, it is not suitable to make a whole magnet embedded in the magnetic pole slot. Therefore, two convex points are designed in the middle of the magnetic pole slot. One is to facilitate the installation of the magnet, and the other is that the two magnets can effectively improve the performance of the entire rotor when installed in this way.

[0021] The two sides of the second magnetic pole slot 6 are provided with triangular slots 8 extending outwards, which can effectively improve the performance of the rotor. Generally, a permanent magnet generator will experience a voltage drop of more than 5% when it is connected to a resistive load and fully loaded. With such a configuration, when the resistive load is running, the voltage basically does not fluctuate, and the voltage may even increase.

[0022] The punch body is provided with screw holes 3 and rivet grooves 4 in sequence from the inside to the outside along the four sides of the shaft groove 1. The number of the screw holes 3 is 4 and they are arranged in a rectangular distribution. The number of the rivet grooves 4 is 4 and they are arranged in a rectangular distribution.

[0023] The number of the magnetic pole slots is four and they are evenly distributed on the punching sheet body. A rotor welding point 9 is provided on the edge of the punching sheet body corresponding to each two groups of magnetic pole slots.

[0024] The first magnetic pole slot 5 and the second magnetic pole slot 6 are arranged side by side, so that more permanent magnets can be installed on the rotor, thereby further improving the overall power performance of the permanent magnet generator. The four-pole permanent magnet generator rotor in this design is superior to the structural design of the traditional permanent magnet generator rotor. In practical applications, the length of the rotor generator of this design is greatly shortened.

[0025] A flat key is installed on the shaft slot 1. When installing with the rotor sheet, the rotor flat key is aligned with the shaft flat key slot 2. The shaft is pressed in with a hydraulic press to increase the fixing strength between the shaft and the rotor. After the rotor magnet is installed, the front and rear sides need to be pressed with a gland. Bolts can connect and fix the front and rear glands through screw holes 3 to ensure the safety of the magnet inside the rotor when the rotor rotates. The rotor is formed by stacking rotor sheets one by one. There are two ways to fix the rotor: the first is to fix the rotor front and back by rivets through rivet slots 4 after the rotor is stacked by a tooling to achieve the effect of fixing the rotor.

[0026] Example 2

[0027] like Figure 2 As shown, a permanent magnet generator rotor punching sheet described in the utility model comprises a punching sheet body, a shaft slot 1, a shaft flat key slot 2, a first magnetic pole slot 5, and a second magnetic pole slot 6. The center of the punching sheet body is provided with the shaft slot 1 for installing the shaft, and the shaft flat key slot 2 is provided on the shaft slot 1. The punching sheet body is provided with a plurality of groups of magnetic pole slots, each group of magnetic pole slots comprises a first magnetic pole slot 5 and a second magnetic pole slot 6. The middle of the top and the bottom of the first magnetic pole slot 5 and the second magnetic pole slot 6 are provided with a convex point 7 protruding inwardly. Considering the length of the magnetic pole and the fragility of the permanent magnet, it is not suitable to make a whole magnet embedded in the magnetic pole slot. Therefore, two convex points are designed in the middle of the magnetic pole slot. One is to facilitate the installation of the magnet, and the other is that the two magnets can effectively improve the performance of the entire rotor when installed in this way.

[0028] The two sides of the second magnetic pole slot 6 are provided with triangular slots 8 extending outwards, which can effectively improve the performance of the rotor. Generally, a permanent magnet generator will experience a voltage drop of more than 5% when it is connected to a resistive load and fully loaded. With such a configuration, when the resistive load is running, the voltage basically does not fluctuate, and the voltage may even increase.

[0029] The number of the magnetic pole slots is four and they are evenly distributed on the punching sheet body. A rotor welding point 9 is provided on the edge of the punching sheet body corresponding to each two groups of magnetic pole slots.

[0030] The first magnetic pole slot 5 and the second magnetic pole slot 6 are arranged side by side, so that more permanent magnets can be installed on the rotor, thereby further improving the overall power performance of the permanent magnet generator. The four-pole permanent magnet generator rotor in this design is superior to the structural design of the traditional permanent magnet generator rotor. In practical applications, the length of the rotor generator of this design is greatly shortened.

[0031] A flat key is installed on the shaft slot 1. When installing with the rotor sheet, the rotor flat key is aligned with the shaft flat key slot 2. The shaft is pressed in with a hydraulic press to increase the fixing strength between the shaft and the rotor. After the rotor magnet is installed, the front and rear sides need to be pressed with a gland. Bolts can connect and fix the front and rear glands through screw holes 3 to ensure the safety of the magnet inside the rotor when the rotor rotates. The rotor is formed by stacking rotor sheets one by one. There are two ways to fix the rotor: the second is to weld the rotor welding point 9 at the position after the rotor sheets are stacked by a tooling machine, so as to achieve the effect of fixing the rotor sheets. The contents not described in detail in this specification belong to the prior art known to professionals in this field.

[0032] The above-mentioned embodiments only express the preferred implementation of the utility model, and the description is relatively specific and detailed, but the utility model is not limited to these embodiments. It should be pointed out that for ordinary technicians in this field. Under the premise of not departing from the purpose of the utility model, any improvement made shall fall within the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A permanent magnet generator rotor punching sheet, characterized in that: The invention comprises a punching sheet body, a rotating shaft groove (1), a rotating shaft flat key groove (2), a first magnetic pole groove (5), and a second magnetic pole groove (6). The center of the punching sheet body is provided with the rotating shaft groove (1) for installing the rotating shaft. The rotating shaft flat key groove (2) is provided on the rotating shaft groove (1). The punching sheet body is provided with a plurality of groups of magnetic pole grooves, each group of magnetic pole grooves comprises a first magnetic pole groove (5) and a second magnetic pole groove (6). The middle of the top and the bottom of the first magnetic pole groove (5) and the second magnetic pole groove (6) are provided with inwardly protruding convex points (7), and the two sides of the second magnetic pole groove (6) are provided with outwardly extending triangular grooves (8).

2. A permanent magnet generator rotor punching sheet according to claim 1, characterized in that: The punch body is provided with screw holes (3) and rivet grooves (4) in sequence from the inside to the outside along the periphery of the rotating shaft groove (1).

3. A permanent magnet generator rotor punching sheet according to claim 2, characterized in that: The number of the screw holes (3) is 4 and they are arranged in a rectangular distribution.

4. A permanent magnet generator rotor punching sheet according to claim 2, characterized in that: The number of the rivet slots (4) is 4 and they are arranged in a rectangular distribution.

5. A permanent magnet generator rotor punching sheet according to claim 1, characterized in that: The number of the magnetic pole slots is four and they are evenly distributed on the punching sheet body. A rotor electric welding point (9) is provided on the edge of the punching sheet body corresponding to each two groups of magnetic pole slots.

6. A permanent magnet generator rotor punching sheet according to claim 1, characterized in that: The first magnetic pole slot (5) and the second magnetic pole slot (6) are arranged side by side.

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