Motor stator coil

Abstract

The utility model relates to the generator field, and specifically discloses a motor stator coil comprising a stator iron core and a stator winding, a side surface of the stator iron core close to a motor rotor is provided with a plurality of notches, the plurality of notches are arranged at one end of the stator iron core, the interiors of the notches are detachably connected with winding fasteners, and the winding fasteners are detachably connected with the stator iron core. The winding fastener is provided with a notch, the notch limits the movement of the winding fastener along the axis direction of the stator core, one surface, close to the motor rotor, of the winding fastener abuts against a limiting block, the limiting block is detachably connected in the notch, the inner side of the stator core is provided with a connecting ring, the plurality of limiting blocks are all fixed on the periphery of the connecting ring, and the connecting ring is connected with the motor rotor. According to the utility model, the winding fasteners are detachably connected to the notches, the disassembly, maintenance and inspection of the stator winding are facilitated, the plurality of limiting blocks used for limiting the movement of the winding fasteners are connected with the connecting ring into a whole, the limiting blocks can move in the notches along the radial direction of the rotor at the same time, and the convenience of assembling and disassembling the limiting blocks at the same time is increased.

Description

Technical Field

[0001] This utility model relates to the field of generators, specifically to a motor stator coil. Background Technology

[0002] A generator is a device that converts mechanical energy into electrical energy and is an important component of a power system. A generator consists of two parts: a rotor and a stator. During long-term use, generators may experience magnetic field instability or bearing wear, leading to vibrations during operation. This vibration causes friction between the internal stator coils and the stator slot wedges, resulting in damage to the insulation layer on the coil surface. Current technology typically uses devices such as retaining rings or connecting blocks to fix the coils and reduce friction between the coils and the slot wedges. However, these devices usually require bolts to be fixed to the stator core, making installation and removal cumbersome and hindering the disassembly, inspection, and maintenance of the stator coils, thus affecting the ease of use. Utility Model Content

[0003] The purpose of this invention is to provide a motor stator coil to overcome the aforementioned defects in the prior art.

[0004] According to the present invention, a stator coil for a motor includes a stator core and a stator winding. The stator core has several slots on its side near the motor rotor. The slots are located at one end of the stator core. A winding fastener is detachably connected inside the slot. The slot restricts the movement of the winding fastener along the axis of the stator core. The side of the winding fastener near the motor rotor abuts against a limit block. The limit block is detachably connected inside the slot. A connecting ring is provided on the inner side of the stator core. The limit blocks are all fixed on the outer periphery of the connecting ring.

[0005] Through the above technical solution, the winding fasteners that fix the stator windings can be detachably connected to the slots on the side wall of the stator core, which facilitates the disassembly, maintenance and inspection of the stator windings. At the same time, several limiting blocks used to restrict the movement of the winding fasteners are integrated with the connecting ring. The limiting blocks can move simultaneously in the slots along the radial direction of the rotor, increasing the convenience of simultaneous installation and removal of the limiting blocks.

[0006] The present invention is further configured such that: the winding fastener has a wire harness groove for fixing the stator winding, and a protrusion is fixed on the side of the winding fastener away from the wire harness groove, the protrusion cooperating with the groove to limit the offset of the winding fastener along the long axis of the stator core.

[0007] With the above technical solution, the side wall slot of the stator core is inverted T-shaped. When the winding fastener is inserted into the T-shaped slot, the protrusion fixed on the side of the winding fastener engages with the recessed part at the bottom of the T-shaped slot, so that the winding fastener is more securely inserted into the T-shaped slot.

[0008] The present invention is further configured such that: the winding fastener is an elastic member, and when the stator winding is inserted into the wire harness slot, the winding fastener undergoes elastic deformation.

[0009] Through the above technical solution, the winding fastener fixes the stator winding through elastic deformation. This connection method helps to reduce the concentrated stress of the winding fastener and reduce the risk of damage to the winding fastener. At the same time, after the winding fastener undergoes elastic deformation, it can expand and contract to a certain extent, making it more convenient to fix the winding with the winding fastener.

[0010] The present invention is further configured such that: a groove is provided in the winding fastener between the wire harness groove and the protrusion, the groove and the wire harness groove divide the winding fastener to form a wire harness base that can undergo elastic deformation, the end face of the wire harness base away from the rotor is an inclined surface that is inclined toward the wire harness groove, and the opening of the wire harness groove is smaller than the diameter of the stator winding.

[0011] The above technical solution, by setting grooves and elastically deformable wire groove bases on the winding fasteners, makes it easier for the wire groove bases to deform, so that the winding fasteners can fix stator windings of different diameters.

[0012] The present invention is further configured such that: the limiting block is inserted into one end of the slot near the motor rotor to limit the displacement of the winding fastener in the radial direction along the stator core.

[0013] The above technical solution allows the limiting block at the end of the slot to prevent the winding fastener from sliding, which helps the winding fastener to be more securely inserted into the slot.

[0014] The present invention is further configured such that there is a gap between the connecting ring and the outer peripheral end face of the motor rotor.

[0015] With the above technical solution, the connecting ring and the motor rotor are spaced apart, which can prevent the connecting ring from affecting the operation of the motor rotor.

[0016] The present invention is further configured such that: a plurality of support rods are fixedly provided on the side of the connecting ring near the motor end cover, and the support rods abut against the motor end cover.

[0017] Through the above technical solution, the support rod set on the end face of the connecting ring can limit the displacement of the connecting ring along the radial direction of the motor core, thereby making the limiting block fixed to the connecting ring more securely inserted into the slot.

[0018] The beneficial effects of this utility model are: the winding fastener can be detachably connected to the slot on the side wall of the stator core, making the disassembly and maintenance of the stator winding more convenient; at the same time, several limiting blocks used to restrict the movement of the winding fastener are integrated with the connecting ring, and the limiting blocks can move simultaneously in the slot along the radial direction of the motor rotor, increasing the convenience of simultaneous installation and removal of the limiting blocks; at the same time, the winding fastener can expand and contract to a certain extent after elastic deformation, making it more convenient to fix the winding with the winding fastener. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model;

[0020] Figure 2 This is a utility model Figure 1 A diagram of AA in the middle;

[0021] Figure 3 This is a utility model Figure 2 Enlarged view of point A in the middle;

[0022] Figure 4 This is a schematic diagram of the slot structure of this utility model;

[0023] Figure 5 This is an exploded view of this utility model;

[0024] Figure 6 This is a schematic diagram of the connecting ring structure of this utility model;

[0025] Figure 7 This is a schematic diagram of the winding fastener of this utility model;

[0026] Figure 8 This is a schematic diagram of the winding fastener structure of this utility model.

[0027] In the diagram: 1. Stator core; 2. Stator winding; 3. Winding fastener; 301. Cable tray; 302. Protrusion; 303. Cable tray base; 304. Groove; 4. Slot opening; 5. Limiting block; 6. Connecting ring; 7. Support rod. Detailed Implementation

[0028] In the description of this utility model, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the appendix. Figure 1 The orientations or positional relationships shown are merely simplified descriptions for the convenience of describing this utility model, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0029] To make the objectives and advantages of this utility model clearer, the following detailed description of the utility model is provided in conjunction with embodiments. It should be understood that the following text is merely used to describe one or more specific implementations of this utility model and does not strictly limit the scope of protection specifically claimed by this utility model. As used herein, the terms up and down and left and right are not limited to their strict geometric definitions, but include tolerances for reasonable and inconsistent machining or human errors. The specific features of a motor stator coil are described in detail below:

[0030] One embodiment of this utility model:

[0031] Reference Figures 1-8 This utility model provides a motor stator coil, including a stator core 1 and a stator winding 2. The stator core 1 has several slots 4 on its side near the motor rotor. The slots 4 are located at one end of the stator core 1. A winding fastener 3 is detachably connected inside the slot 4. The side of the winding fastener 3 near the motor rotor abuts against a limiting block 5. The limiting block 5 is detachably connected inside the slot 4. A connecting ring 6 is provided on the inner side of the stator core 1. Several limiting blocks 5 are fixed on the outer periphery of the connecting ring 6. Several support rods 7 are fixed on the side of the connecting ring 6 near the motor end cover.

[0032] according to Figure 8 As shown, the winding fastener 3 has a wire harness groove 301 for fixing the stator winding 2. A protrusion 302 is fixedly connected to the side of the winding fastener 3 away from the wire harness groove 301. A groove 304 is formed inside the winding fastener 3 between the wire harness groove 301 and the protrusion 302. The groove 304 and the wire harness groove 301 divide the winding fastener 3 to form a wire harness base 303. The inner wall of the opening side of the wire harness groove 301 is inclined to form a slope. The stator winding 2 is inserted into the wire harness groove 301. During the insertion process, the inclined opening of the wire harness slot 301 can play a guiding role, reducing the frictional resistance when the stator winding 2 is inserted, making it easier to fix in the wire harness slot 301. At the same time, the opening of the wire harness slot 301 is smaller than the diameter of the stator winding 2, and the fastener needs to apply a certain pressure to insert it into the winding. This connection method can ensure that the fastener and the winding are more tightly engaged, preventing the stator winding 2 from shifting in the wire harness slot 301 during motor operation and generating friction.

[0033] Meanwhile, the winding fastener 3 is made of elastic rubber material. This material ensures that the winding fastener 3 undergoes elastic deformation when subjected to force. At the same time, the winding fastener 3 made of this material is an insulator to avoid interfering with the internal magnetic field of the motor. During the process of the stator winding 2 being inserted into the wire harness slot 301, the fastener made of elastic material deforms. The deformation transmits stress to the surrounding molecules or crystal structures. Due to the elastic properties of the material, this deformation causes the molecules or crystal structures to rearrange to adapt to the external force. When the external force is removed, these molecules or crystal structures will return to their original state, thereby reducing the occurrence of concentrated stress and reducing the risk of damage to the winding fastener 3.

[0034] according to Figure 4 , Figure 7 As shown, the slot 4 is inverted T-shaped. When the winding fastener 3 is inserted into the slot 4, the protrusion 302 fixed on the side of the winding fastener 3 is connected to the recessed part at the bottom of the slot 4. The snap-fit ​​connection usually adopts an interlocking design, that is, the protrusion 302 on the winding fastener 3 matches the recess of the slot 4 to form a mutually fitting structure. This design can lock the connectors in multiple directions to prevent the winding fastener 3 from moving relative to each other during use, so that the winding fastener 3 is more securely inserted into the slot 4.

[0035] according to Figure 4 , Figure 6 As shown, the limiting block 5 is inserted into the slot 4 near the motor rotor to limit the displacement of the winding fastener 3 in the radial direction along the stator core 1. At the same time, when several limiting blocks 5 are connected to the connecting ring 6, the limiting blocks 5 can move simultaneously in the slot 4 in the radial direction of the rotor, increasing the convenience of simultaneous installation and removal of the limiting blocks 5. There is a gap between the connecting ring 6 and the outer peripheral end face of the motor rotor, which can prevent the connecting ring 6 from affecting the operation of the motor rotor. At the same time, the support rod 7 on the end face of the connecting ring 6 abuts against the motor end cover, which can limit the displacement of the connecting ring 6 in the radial direction along the motor core, so that the limiting block 5 fixed to the connecting ring 6 is more firmly inserted into the slot 4.

[0036] Those skilled in the art will appreciate that various modifications to the above embodiments can be made without departing from the overall spirit and concept of this utility model. All such modifications fall within the protection scope of this utility model. The protection scheme of this utility model is defined by the appended claims.

Claims

1. An electric machine stator coil comprising a stator core (1) and a stator winding (2), characterized in that: The stator core (1) is provided with a plurality of notches (4) on the side close to the motor rotor, a plurality of the notches (4) are located at one end of the stator core (1), the notch (4) is detachably connected with the winding fastener (3), the notch (4) limits the movement of the winding fastener (3) along the axis direction of the stator core (1), the winding fastener (3) is abutted with a limiting block (5) on the side close to the motor rotor, the limiting block (5) is detachably connected in the notch (4), the stator core (1) is provided with a connecting ring (6) on the inner side, and a plurality of the limiting blocks (5) are all fixed on the outer periphery of the connecting ring (6).

2. An electric machine stator coil according to claim 1, characterized in that: The winding fastener (3) is provided with a wire binding groove (301) for fixing the stator winding (2), the winding fastener (3) is provided with a protrusion (302) on the side away from the wire binding groove (301), and the protrusion (302) cooperates with the notch (4) to limit the offset of the winding fastener (3) along the long axis direction of the stator core (1).

3. An electrical machine stator coil according to claim 2, characterised in that: The winding fastener (3) is an elastic member, and the winding fastener (3) is elastically deformed when the stator winding (2) is inserted into the wire binding groove (301).

4. An electrical machine stator coil according to claim 3, characterised in that: The winding fastener (3) is provided with a groove (304) between the wire binding groove (301) and the protrusion (302), the groove (304) and the wire binding groove (301) divide the winding fastener (3) to form a wire groove base (303) capable of being elastically deformed, the end face of the wire groove base (303) away from the rotor is an inclined surface inclined to the wire binding groove (301), and the opening of the wire binding groove (301) is smaller than the diameter of the stator winding (2).

5. A motor stator coil according to claim 1, characterized in that: The limiting block (5) is inserted into the end of the notch (4) close to the motor rotor to limit the displacement of the winding fastener (3) in the radial direction of the stator core (1).

6. An electrical machine stator coil according to claim 5, characterised in that: The connecting ring (6) and the outer peripheral end face of the motor rotor are spaced apart.

7. A motor stator coil according to claim 1, characterized in that: The connecting ring (6) is provided with a plurality of support rods (7) on the side close to the motor end cover, and the support rods (7) abut the motor end cover.

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