Submersible motor stator winding nesting device

Abstract

The utility model belongs to submersible motor stator winding processing technical field especially relates to a submersible motor stator winding nesting device. In order to solve the problem that the shape of the existing submersible motor stator winding is irregular and the size is not standard, the utility model discloses a submersible motor stator winding nesting device, which comprises an annular base, two arc convex sections are symmetrically arranged on the annular base; The arc convex section extends along the axial direction of the annular base. The independently arranged nesting device provides a winding carrier for the winding set, so that the winding set is shaped under the constraint of the winding carrier to form a winding with regular shape and standard size. The insulation of the nesting device and the axial arrangement of the different phase nesting devices realize the insulation between different phase windings, which improves the installation efficiency of the submersible motor stator winding and prolongs its service life.

Description

Technical Field

[0001] This utility model relates to a stator winding nesting device for a submersible motor, belonging to the field of submersible motor stator winding manufacturing. Background Technology

[0002] In existing submersible motors, the stator housing contains a stator core with snap rings at both ends to axially limit its movement. When winding the electromagnetic wire to form the winding, workers manually thread the wire through the lamination slots of the stator core and out the end of the core. After bending it outside the end, the wire is re-threaded into another lamination slot. The winding is formed after a certain number of turns. This manual winding results in inconsistent wire shape at the bends, making them prone to deformation when tightened. Consequently, the resulting submersible motor stator winding is irregular in shape and size, with individual electromagnetic wires diverging. To prevent damage to the winding insulation during rotor assembly due to the irregular shape, the winding is hammered to achieve a regular, flat shape after winding. However, this shaping process, involving squeezing and hammering, easily damages the insulation layer of the electromagnetic wire.

[0003] In addition, the portion of the winding located outside the end of the lamination slot of the iron core extends outside the lamination slot. In order to ensure the insulation between different phase windings, the existing technology either wraps insulating binding tape around the different phase windings separately or pads the phase insulation material between the different phase windings. The method of wrapping insulating binding tape around the different phase windings is cumbersome, which significantly reduces the installation efficiency of the submersible motor. Moreover, the insulation between different phase windings is only achieved through the spacing of the binding tape. When the motor is running, the binding tapes of different phase windings rub against each other, which can easily cause the binding tapes to break and lead to insulation failure. As for the method of padding the insulation material between different phase windings, the insulation material between the different phase windings can easily shift due to vibration during normal operation of the motor, leading to insulation failure and causing the motor to be scrapped.

[0004] Furthermore, the vibration generated during motor operation can easily cause the winding wires to move axially within the stator core slots, resulting in friction between the windings and other components, leading to insulation failure of the winding wires and affecting the service life of the motor. To solve the problem of axial limiting, Chinese utility model patent with authorization announcement number CN204517535U discloses a novel stator winding wire fixing device for submersible motors, including a motor housing, a stator core, and binding straps. The stator core has stator insulation end plates and stator forming blocks arranged sequentially at both ends. The inner side of the motor housing has a first annular groove and a first retaining ring that restricts the axial displacement of the stator core. Three sets of stator forming blocks are spliced ​​together in a ring shape along the circumference, with a notch on the side opposite to the stator insulation end plates. The winding wire ends are bound to the stator forming blocks by the binding straps passing around the notches. The inner side of the motor housing has a second annular groove, and a second retaining ring that restricts the movement of the stator forming blocks towards the winding ends is provided in the groove. This invention prevents axial movement of the winding wires and avoids insulation damage caused by relative friction between the winding wires and the insulation slots and stator core slots. However, for the insulation between different phase windings, it still uses the traditional method of binding tape insulation and padding insulation material. This method has the problem of easily damaging the insulation layer of the electromagnetic wire wrapping when the windings are shaped by hammering during installation. It also has the problems of low installation efficiency of submersible motors and the vibration caused by motor operation leading to friction or displacement between different phase windings, resulting in insulation failure and affecting the service life of the motor. Utility Model Content

[0005] The purpose of this utility model is to provide a stator winding nesting device for submersible motors to solve the problems of irregular shape and non-standard size of existing submersible motor stator windings.

[0006] To achieve the above objectives, this utility model provides a stator winding nesting device for a submersible motor, including an annular base. Two arc-shaped protrusions are symmetrically arranged on the inner edge of the annular base. The arc-shaped protrusions extend along the axial direction of the annular base and include winding segments. Each winding segment is located on the same side of the axial direction of the annular base and is used for winding a coil around the outer circumference of the winding segment to form a winding. The arc length of the winding segment and its height in the axial extension direction of the annular base meet the specifications of the electromagnetic wire after winding and shaping into a winding.

[0007] Beneficial Effects: This utility model is an improved invention. The stator winding nesting device introduces a nesting mechanism based on the original stator winding wire fixing process. The electromagnetic wire is wound around the arc-shaped protrusion to form a winding, providing a carrier for the winding. This results in a winding with a regular shape and standardized dimensions, eliminating the need for additional pressing and hammering shaping processes and avoiding damage to the winding insulation layer during shaping. Furthermore, different phase windings are wound on multiple different nesting devices arranged sequentially along the axial direction. The nesting devices achieve spatial spacing between different phases, preventing direct contact and mutual wear. The insulation of the nesting devices themselves meets the insulation requirements between different phases, avoiding the impact of motor vibration on insulation and extending the service life of the stator windings. Clearly, this utility model uses independently set nesting devices to provide a winding carrier for the winding assembly, allowing the winding assembly to be shaped under the constraint of the winding carrier to form a winding with a regular shape and standardized dimensions. The insulation of the nesting devices and the sequential axial arrangement of different phase nesting devices achieve insulation between different phase windings, improving the installation efficiency of the submersible motor stator windings while extending their service life.

[0008] Furthermore, both ends of the arc-shaped protrusion are provided with straightening claws extending toward the center of the annular base.

[0009] Beneficial effects: It plays a corrective and guiding role on the winding electromagnetic wire, ensuring the stability of the winding electromagnetic wire as it winds on the arc-shaped raised section.

[0010] Furthermore, the dimensions between the two straightening claws at the corresponding ends of the two arc-shaped protrusions constitute a structure that meets the specification requirements after the coil is wound into a winding.

[0011] Beneficial effect: Meets the coil turns requirement.

[0012] Furthermore, the height of the straightening claw is the same as the height of the arc-shaped protrusion.

[0013] Beneficial effects: While ensuring that the height of the arc-shaped protrusion meets the specification requirements after the coil is wound into a winding and ensuring the guiding effect of the straightening claw on the winding electromagnetic wire, the axial dimension of the nesting device is minimized as much as possible to reduce the size of the motor and reduce the manufacturing cost of the nesting device.

[0014] Furthermore, the ends of each straightening claw that are away from the arc-shaped protrusion are located on the same circle.

[0015] Beneficial effects: Improves the symmetry and aesthetics of the windings.

[0016] Furthermore, the connection between the straightening claw and the arc-shaped protrusion is arc-shaped.

[0017] Beneficial effect: Prevents the winding electromagnetic wire from being scratched when it bends and winds from the straightening claw position to the arc-shaped protrusion section.

[0018] Furthermore, the arc-shaped protrusion also includes a connecting section, which is disposed on one end face of the annular base.

[0019] Beneficial effect: Easy to process.

[0020] Furthermore, the arc-shaped protrusion also includes a connecting section, which is disposed on the inner wall surface of the annular base.

[0021] Beneficial effects: Increases the winding space on the outer side of the arc-shaped protrusion to accommodate electromagnetic wires of different specifications, thereby improving the applicability of the nesting device.

[0022] Furthermore, the connecting segment transitions into the inner wall of the annular base in an arc shape.

[0023] Beneficial effect: Prevents the electromagnetic wire from being scratched by the connection between the connecting section and the inner wall of the annular base when it passes through the inner cavity of the annular base and bends and wraps around the outer periphery of the arc-shaped protrusion.

[0024] Furthermore, the circles containing the two arc-shaped protrusions are concentric with the circle containing the inner wall of the annular base.

[0025] Beneficial effects: It facilitates processing and improves the aesthetics of the winding. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the stator winding nested mold structure of this utility model;

[0027] Figure 2 This is a schematic diagram of the stator winding nesting mold of this utility model from another perspective.

[0028] Figure 3 This is a schematic diagram of the stator winding electromagnetic wire protrusion structure of this utility model;

[0029] Figure 4 This is a schematic diagram of the stator winding electromagnetic wire insertion structure of this utility model;

[0030] Figure 5 This is a schematic diagram of the stator winding nesting mold structure after the wire is inserted.

[0031] Figure 6 This is a three-dimensional structural diagram of the stator winding electromagnetic wire protrusion structure of this utility model;

[0032] Figure 7 This is a three-dimensional structural diagram of the stator winding electromagnetic wire insertion structure of this utility model;

[0033] Figure 8This is a three-dimensional structural diagram of the stator winding nested mold after the wire is inserted.

[0034] Among them, 1. arc-shaped protrusion section, 2. straightening claw, 3. ring base, 4. motor stator housing, 5. stator core, 6. winding through slot, 7. stator silicon steel sheet retaining ring, 8. stator inner cavity insulation ring, 9. winding entering slot, 10. winding nesting, 11. winding electromagnetic wire. Detailed Implementation

[0035] To address the problems in the background technology, the core inventive concept of this utility model is to provide a winding carrier for the winding group using an independently set nesting device, so that the winding group can be shaped under the constraint of the winding carrier to form a winding with regular shape and standard size. Furthermore, the insulation of the nesting device and the axial sequential arrangement of different phase nesting devices are used to achieve insulation between different phase windings, thereby improving the installation efficiency of the stator winding of the submersible motor and extending its service life.

[0036] The present invention will be further described in detail below with reference to an embodiment of the stator winding nesting device for a submersible motor.

[0037] The stator winding nesting device of this utility model for submersible motors, such as Figure 1 As shown, the device includes an annular base 3, on which two arc-shaped protrusions 1 are symmetrically arranged. Both ends of the arc-shaped protrusions 1 are provided with straightening claws 2 extending toward the center of the annular base. The dimensions between the two arc-shaped protrusions 1 and their corresponding two straightening claws 2 constitute a structure that meets the specifications required after the coil is wound into a winding. The ends of each straightening claw 2 away from the arc-shaped protrusions 1 are located on the same circle. The connection between the straightening claws 2 and the arc-shaped protrusions 1 is an arc transition. The arc-shaped protrusions 1 also include a connecting section, which is located on the inner wall of the annular base 3. The circles containing the two arc-shaped protrusions 1 and the circle containing the inner wall of the annular base 3 are concentric circles. The nesting device is made of insulating material.

[0038] In other embodiments, the connecting section of the arc-shaped protrusion 1 can also be set on one end face of the annular base 3, and the rest of the structure is the same as in the above embodiments.

[0039] like Figure 2 As shown, the arc-shaped protrusion 1 extends along the axial direction of the annular base 3. The arc-shaped protrusion 1 includes a winding segment. Each winding segment is located on the same side of the axial direction of the annular base 3. It is used for the coil to be wound on the outer periphery of the winding segment to form a winding. The height of the winding segment in the axial extension direction of the annular base 3 meets the specification requirements after the coil is wound into a winding. The height of the straightening claw 2 is the same as the height of the arc-shaped protrusion 1.

[0040] like Figure 3-8As shown, the nesting device 10 in this embodiment is used for the stator winding of the submersible motor. The outer diameter of the annular base 3 is larger than the inner diameter of the snap ring 7 so as to realize the snap ring to stop and limit the annular base in the axial direction. The inner ring space of the annular base 3 avoids the iron core lamination slot so that the coil passing through the iron core lamination slot can pass through, thereby avoiding the annular base from obstructing the path of the winding coil passing through the iron core lamination slot in the axial direction. The inner side of the motor stator housing 4 is provided with a stator inner cavity insulating ring 8 around the winding nest 10.

[0041] like Figure 3-8 As shown, in use, the stator winding nesting device of this utility model for a submersible motor is to place the winding nest 10 inside the stator inner cavity insulating ring 8 facing the iron core, and to make the winding nest 10 and the retaining ring 7 axially stop each other. The inner ring space of the annular base 3 avoids the iron core lamination slots to allow the coils passing through the iron core lamination slots to pass through. When one phase is wound (assumed to be phase A), such as Figure 3 As shown, the winding electromagnetic wire 11 passes through the section between the two straightening claws 2 at the corresponding ends of the winding exit slot 6 and the different arc-shaped protrusions 1, and exits from the outer edge of one end of the arc-shaped protrusion, as shown. Figure 4 As shown, the winding electromagnetic wire 11 sequentially enters the section between the two straightening claws 2 at the other corresponding end of the different arc-shaped protrusions 1 and the winding insertion slot 6. The winding electromagnetic wire 11 at the end naturally bends into an arc shape, as shown... Figure 5 As shown, the arc-shaped winding electromagnetic wire 11 is manually introduced into the annular space between the insulating ring 8 and the winding segment of the winding nest 10 in the stator cavity. Then, the winding electromagnetic wire 11, which passes through the other end of the stator axial direction, is pulled taut. The winding electromagnetic wire 11 embedded between the insulating ring 8 and the winding segment of the winding nest 10 in the stator cavity naturally forms an arc shape. The required number of turns are embedded one turn at a time and pulled taut, thus completing the winding of phase A. After the winding of phase A is completed, the phase B winding nest is installed axially to nest the phase B winding. The axial projection of the phase B winding nest and the phase A winding nest differs by a rotation angle of 60°. Phase B is then embedded in the same way as phase A. After the winding of phase A is completed, phase C is embedded in the same way.

[0042] In other embodiments, the connecting section transitions to the inner wall of the annular base in an arc shape.

[0043] In other embodiments, the arc-shaped protrusion and the straightening claw can be integrally formed.

[0044] In other embodiments, the arc-shaped protrusion and the annular base can be integrally formed.

[0045] In other embodiments, the arc-shaped protrusion, the straightening claw, and the annular base are all integrally formed.

[0046] Finally, it should be noted that the above are merely preferred embodiments of this utility model and are not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments without creative effort, or make equivalent substitutions for some technical features, or organically combine different types of specific implementation methods to create the specific implementation methods shown in the accompanying drawings. Of course, those skilled in the art can also create other specific implementation methods not shown in the accompanying drawings. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A stator winding nesting device for a submersible motor, characterized in that: It includes an annular base, with two symmetrically arranged arc-shaped protrusions on the inner edge of the annular base. The arc-shaped protrusions extend along the axial direction of the annular base and include winding segments. Each winding segment is located on the same side of the axial direction of the annular base and is used for winding the coil around the outer circumference of the winding segment to form a winding. The arc length of the winding segment and its height in the axial extension direction of the annular base meet the specifications of the electromagnetic wire after being wound and shaped into a winding.

2. The submersible motor stator winding nesting device according to claim 1, characterized in that: Both ends of the arc-shaped protrusion are provided with straightening claws extending toward the center of the annular base.

3. The submersible motor stator winding nesting device according to claim 2, characterized in that: The dimensions between the two straightening claws at the corresponding ends of the two arc-shaped protrusions constitute a structure that meets the specification requirements after the coil is wound into a winding.

4. The submersible motor stator winding nesting device according to claim 3, characterized in that: The height of the straightening claw is the same as the height of the arc-shaped protrusion.

5. The submersible motor stator winding nesting device according to claim 2, 3, or 4, characterized in that: The ends of each straightening claw that are away from the arc-shaped protrusion are located on the same circle.

6. The submersible motor stator winding nesting device according to claim 5, characterized in that: The connection between the straightening claw and the arc-shaped protrusion is an arc-shaped transition.

7. The submersible motor stator winding nesting device according to claim 1, characterized in that: The arc-shaped protrusion also includes a connecting section, which is disposed on one end face of the annular base.

8. The stator winding nesting device for a submersible motor according to claim 1, characterized in that: The arc-shaped protrusion also includes a connecting section, which is disposed on the inner wall of the annular base.

9. The stator winding nesting device for a submersible motor according to claim 8, characterized in that: The connecting section transitions into the arc shape of the inner wall of the annular base.

10. The stator winding nesting device for a submersible motor according to claim 1, characterized in that: The circles containing the two arc-shaped protrusions are concentric with the circle containing the inner wall of the annular base.

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