Rotor punching sheet multi-splicing structure suitable for large ship pod motor

Abstract

The invention relates to the technical field of motor rotating shaft rods, and discloses a rotor punching sheet multi-splicing structure suitable for a large ship pod motor, and the structure comprises a plurality of splicing rotor sheets disposed on a rotating shaft rod, a plurality of pins used for positioning the splicing rotor sheets, and a plurality of tensioning assemblies used for fixing the plurality of splicing rotor sheets. And the plurality of spliced rotor sheets are laminated together. According to the rotor punching sheet multi-splicing structure suitable for the large ship pod motor, the fan-shaped punching sheets, the pins and the tensioning assemblies are arranged, the fan-shaped punching sheets are spliced to form a whole circle, the splicing seams among the fan-shaped punching sheets on the upper layer and the splicing seams among the fan-shaped punching sheets on the lower layer are arranged in a staggered mode, and the tensioning screws and the fixing nuts are matched for fixation; the whole iron core can form a whole, the width of a silicon steel sheet coil needed when the fan-shaped punching sheet is machined is small, and the fan-shaped punching sheet is convenient to move, assemble, machine and install.

Description

Technical Field

[0001] The present invention relates to the technical field of motor shaft rods, and specifically to a multi-piece structure for the rotor punching sheet of a large ship pod motor Background Art

[0002] The rotor winding of a squirrel-cage induction motor gets its name because its shape resembles a squirrel cage. Its structure is that copper bars are embedded in the slot as conductors, and the two ends of the copper bars are welded together with short-circuit rings. The rotor of a large ship pod motor often adopts a squirrel-cage structure, which has the advantages of simple structure, convenient inspection and maintenance, and high reliability. The punching sheet is a key structure of the rotor. The punching sheets of the conventional squirrel-cage structure are all laminated with a whole-round silicon steel sheet and then thermally sleeved and connected with the shaft rod. Ventilation holes and screw holes are opened on the punching sheet.

[0003] When the diameter size of the rotor punching sheet increases to 2.1 m, the width of the silicon steel sheet should be increased accordingly. At the same time, large equipment is required to punch the silicon steel sheet, which occupies a large space during processing, and the processed rotor punching sheet is inconvenient to transfer and assemble due to its too large diameter, and the processing process is troublesome. Summary of the Invention

[0004] In view of the deficiencies of the prior art, the present invention provides a multi-piece structure for the rotor punching sheet of a large ship pod motor, which solves the problems mentioned in the above background.

[0005] The present invention provides the following technical solutions: A multi-piece structure for the rotor punching sheet of a large ship pod motor, comprising: a plurality of spliced rotor sheets mounted on a shaft rod, a plurality of pins for positioning the spliced rotor sheets, and a plurality of tensioning components for fixing the plurality of spliced rotor sheets, and the plurality of spliced rotor sheets are laminated together;

[0006] Each of the spliced rotor sheets includes a plurality of sector-shaped punching sheets, and the plurality of sector-shaped punching sheets are spliced to form a whole circle. In the adjacent upper and lower layers of the spliced rotor sheets, the seams between the plurality of sector-shaped punching sheets in the upper layer are arranged in a staggered manner with the seams between the plurality of sector-shaped punching sheets in the lower layer;

[0007] Each sector-shaped punching sheet is provided with a mounting hole for mounting a tensioning component and a pin hole for mounting a pin.

[0008] Preferably, the number of the sector-shaped punching sheets is eight, and the eight sector-shaped punching sheets are circumferentially spliced to form a whole circle.

[0009] Preferably, each sector-shaped punching sheet has 3 pin holes and 3 mounting holes, and the adjacent upper and lower layer sector-shaped punching sheets are overlapped and laminated at an angle of 1 / 3 or 2 / 3 of the sector-shaped punching sheet in a staggered manner;

[0010] The mounting holes of the upper-layer sector punching sheets overlap with those of the lower-layer sector punching sheets, and the pin holes of the upper-layer sector punching sheets overlap with those of the lower-layer sector punching sheets.

[0011] Preferably, ventilation holes are provided on each sector punching sheet, and the ventilation holes of the upper-layer sector punching sheets overlap with those of the lower-layer sector punching sheets.

[0012] Preferably, the tensioning assembly includes a tensioning screw and a fixing nut. The surface of the tensioning screw is connected to the inner wall of the mounting hole, and one end of the tensioning screw passes through the sector punching sheet and is connected to the inner wall of the fixing nut.

[0013] Preferably, retaining rings are provided on both sides of the multiple spliced rotor sheets, and multiple guide bar rods are provided between the two retaining rings. The multiple guide bar rods are evenly distributed circumferentially along the retaining rings.

[0014] Preferably, a plurality of squirrel-cage guide bar grooves are evenly formed on the outer circumferential surface of each sector punching sheet, and the inner wall of the squirrel-cage guide bar groove is connected to the surface of the guide bar rod.

[0015] Preferably, a through groove is formed at a position on the surface of the retaining ring corresponding to the ventilation hole, a round hole is formed at a position on the surface of the retaining ring corresponding to the pin hole, and a plurality of through holes for the tensioning screw to pass through are formed on the surface of the retaining ring.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The multi-spliced structure of the rotor punching sheet applicable to large ship pod motors, by setting sector punching sheets, pins and a tensioning assembly, multiple sector punching sheets are spliced to form a complete circle. The joints between the multiple upper-layer sector punching sheets and the joints between the multiple lower-layer sector punching sheets are arranged in a staggered manner, fixed with a tensioning screw and a fixing nut, and pins are installed. The entire iron core can become an integral body. The width of the silicon steel sheet coil required for processing the sector punching sheets is small, and it is convenient for moving and assembling, facilitating processing and installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic structural diagram of the spliced rotor sheet of the present invention mounted on a rotating shaft rod;

[0019] Figure 2 It is a schematic exploded structural diagram of two adjacent spliced rotor sheets of the present invention;

[0020] Figure 3 It is a schematic top view structural diagram of the spliced rotor sheet of the present invention;

[0021] Figure 4 It is a schematic enlarged partial structural diagram at the position of the tensioning assembly of the present invention.

[0022] In the figure: 1, rotating shaft rod; 2, spliced rotor sheet; 201, sector punching sheet; 202, mounting hole; 203, pin hole; 3, pin; 4, tensioning assembly; 401, tensioning screw; 402, fixing nut; 5, ventilation hole; 6, retaining ring; 7, bar guide rod; 8, squirrel cage bar groove. Detailed implementation mode

[0023] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0024] Please refer to Figures 1-4 , a multi-spliced structure suitable for the rotor punching sheet of a large ship pod motor, including: a plurality of spliced rotor sheets 2 installed on the rotating shaft rod 1, a plurality of pins 3 for positioning the spliced rotor sheets 2, and a plurality of tensioning assemblies 4 for fixing the plurality of spliced rotor sheets 2. The plurality of spliced rotor sheets 2 are stacked together. Each spliced rotor sheet 2 includes a plurality of sector punching sheets 201, and the plurality of sector punching sheets 201 are spliced to form a complete circle. Among the upper and lower adjacent spliced rotor sheets 2, the seams between the plurality of sector punching sheets 201 in the upper layer are arranged in a staggered manner with the seams between the plurality of sector punching sheets 201 in the lower layer. Each sector punching sheet 201 is provided with a mounting hole 202 for installing the tensioning assembly 4 and a pin hole 203 for installing the pin 3.

[0025] In a specific embodiment, the number of sector punching sheets 201 is eight, and the eight sector punching sheets 201 are circumferentially spliced to form a complete circle. Each sector punching sheet 201 has 3 pin holes 203 and 3 mounting holes 202. The adjacent upper and lower sector punching sheets 201 are overlapped and stacked at an angle of 1 / 3 or 2 / 3 of the sector punching sheet 201 in a staggered manner; the mounting holes 202 of the upper sector punching sheet 201 overlap with the mounting holes 202 of the lower sector punching sheet 201, and the pin holes 203 of the upper sector punching sheet 201 overlap with the pin holes 203 of the lower sector punching sheet 201.

[0026] Each sector punching sheet 201 is provided with a ventilation hole 5, and the ventilation holes 5 of the upper sector punching sheet 201 overlap with the ventilation holes 5 of the lower sector punching sheet 201.

[0027] The tensioning assembly 4 includes a tensioning screw 401 and a fixing nut 402. The surface of the tensioning screw 401 is connected to the inner wall of the mounting hole 202, and one end of the tensioning screw 401 passes through the sector punching sheet 201 and is connected to the inner wall of the fixing nut 402.

[0028] On both sides of multiple spliced rotor sheets 2, retaining rings 6 are provided. Between the two retaining rings 6, multiple guide bar rods 7 are provided. The multiple guide bar rods 7 are evenly distributed circumferentially along the retaining rings 6. On the outer circumferential surface of each sector punching sheet 201, multiple squirrel-cage guide bar grooves 8 are evenly formed. And the inner wall of the squirrel-cage guide bar groove 8 is connected to the surface of the guide bar rod 7. At the position on the surface of the retaining ring 6 corresponding to the ventilation holes 5, through grooves are formed. At the position on the surface of the retaining ring 6 corresponding to the pin holes 203, circular holes are formed. And on the surface of the retaining ring 6, multiple through holes for the tensioning screw 401 to pass through are formed.

[0029] Install pins 3 and sector punching sheets 201 on the bottom retaining ring 6, so that the seams between the multiple upper-layer sector punching sheets 201 are misaligned with the seams between the multiple lower-layer sector punching sheets 201. At the same time, the mounting holes 202 of the upper-layer sector punching sheets 201 overlap with the mounting holes 202 of the lower-layer sector punching sheets 201. Clamp with a hydraulic press. After installing the tensioning screw 401, release the hydraulic press. Then, thermally sleeve-connect the entire iron core to the rotating shaft rod. Finally, install other components such as the top retaining ring 6 of the guide bar rod 7. The multiple sector punching sheets 201 are spliced to form a complete circle. The seams between the multiple upper-layer sector punching sheets 201 are arranged in a misaligned manner with the seams between the multiple lower-layer sector punching sheets 201. Cooperate with the tensioning screw 401 and the fixing nut 402 for fixation, and install the pins 3. The entire iron core can become an integral body. The tensioning screw 401 will provide an axial pressure to the entire iron core. There will be a pressing force between each adjacent upper and lower-layer sector punching sheet 201. The iron core of the rotor 1 forms an integral body, and the effect is equivalent to that of a complete-circle punching sheet. The width of the silicon steel sheet coil required for processing the sector punching sheet 201 is small, and it is convenient for moving and assembling, facilitating processing and installation. It can achieve a rotating shaft rod with a diameter exceeding 2 m or even larger, improving the capacity of large marine pod motors.

[0030] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A multi-piece structure applicable to the rotor punching sheet of a pod motor for large ships, characterized in that Including: A plurality of spliced rotor sheets (2) mounted on a rotating shaft rod (1), a plurality of pins (3) for positioning the spliced rotor sheets (2), and a plurality of tensioning assemblies (4) for fixing the plurality of spliced rotor sheets (2), and the plurality of spliced rotor sheets (2) are stacked together; Each of the spliced rotor sheets (2) includes a plurality of sector-shaped punching sheets (201), and the plurality of sector-shaped punching sheets (201) are spliced to form a complete circle. Among the upper and lower adjacent two spliced rotor sheets (2), the seams between the plurality of sector-shaped punching sheets (201) in the upper layer are arranged in a staggered manner with the seams between the plurality of sector-shaped punching sheets (201) in the lower layer; Each sector-shaped punching sheet (201) is provided with a mounting hole (202) for mounting the tensioning assembly (4) and a pin hole (203) for mounting the pin (3).

2. The multi-piece structure of the rotor punching sheet of a pod motor applicable to large ships according to claim 1, wherein The number of the sector-shaped punching sheets (201) is eight, and the eight sector-shaped punching sheets (201) are spliced circumferentially to form a complete circle.

3. The multi-piece structure of the rotor punching sheet for a large ship pod motor according to claim 2, characterized in that, Each sector-shaped punching sheet (201) has 3 pin holes (203) and 3 mounting holes (202), and the adjacent upper and lower sector-shaped punching sheets (201) are overlapped and stacked together at an angle of 1 / 3 of the sector-shaped punching sheet (201) or an angle of 2 / 3 of the sector-shaped punching sheet (201); The mounting holes (202) of the upper-layer sector-shaped punching sheets (201) overlap with the mounting holes (202) of the lower-layer sector-shaped punching sheets (201), and the pin holes (203) of the upper-layer sector-shaped punching sheets (201) overlap with the pin holes (203) of the lower-layer sector-shaped punching sheets (201).

4. A multi-piece structure of a rotor punching sheet for a pod motor applicable to large ships according to claim 1, characterized in that, Each sector-shaped punching sheet (201) is provided with ventilation holes (5), and the ventilation holes (5) of the upper-layer sector-shaped punching sheets (201) overlap with the ventilation holes (5) of the lower-layer sector-shaped punching sheets (201).

5. A multi-piece structure of a rotor punching sheet for a pod motor applicable to large ships according to claim 4, characterized in that, The tensioning assembly (4) includes a tensioning screw rod (401) and a fixing nut (402). The surface of the tensioning screw rod (401) is connected to the inner wall of the mounting hole (202), and one end of the tensioning screw rod (401) passes through the sector-shaped punching sheet (201) and is connected to the inner wall of the fixing nut (402).

6. The multi-piece structure of the rotor punching sheet for a large ship pod motor according to claim 5, characterized in that, Pressure rings (6) are arranged on both sides of the plurality of spliced rotor sheets (2), and a plurality of guide bar rods (7) are arranged between the two pressure rings (6), and the plurality of guide bar rods (7) are evenly distributed along the circumference of the pressure rings (6).

7. A multi-piece structure of a rotor punching sheet for a pod motor applicable to large ships according to claim 6, characterized in that, A plurality of squirrel-cage guide bar grooves (8) are evenly formed on the outer circumferential surface of each sector-shaped punching sheet (201), and the inner wall of the squirrel-cage guide bar grooves (8) is connected to the surface of the guide bar rod (7).

8. A multi-piece structure of a rotor punching sheet for a pod motor applicable to large ships according to claim 7, characterized in that, Through grooves are formed at positions on the surface of the pressure ring (6) corresponding to the ventilation holes (5), round holes are formed at positions on the surface of the pressure ring (6) corresponding to the pin holes (203), and a plurality of through holes for the tensioning screw rod (401) to pass through are formed on the surface of the pressure ring (6).

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