A heat dissipation support structure for a stator coil end

Abstract

The utility model discloses a kind of heat dissipation support structures of stator coil end, including eight insulating supports of 7-shaped. Four insulating supports are arranged on the coil end on the left side of outlet by far to near equidistribution, and the other four insulating supports are arranged on the coil end on the right side of outlet by far to near;First bunch winding lead-out wire is clockwise coiled along coil end and is sequentially placed on the top surface of first to fourth insulating supports, and then lead out to outlet;Second bunch winding lead-out wire is clockwise coiled along coil end and is sequentially passed between the bottom surface of the transverse part of third and fourth insulating supports and the end surface of coil end, and then lead out to outlet;Third bunch winding lead-out wire is clockwise coiled along coil end and is sequentially placed on the outside surface of the vertical part of fourth insulating support, and then lead out to outlet;Each insulating support and winding lead-out wire on it are bound on coil end by outer binding line.The utility model is conducive to the air circulation of coil end, and can improve the structural stability of coil end.

Description

Technical Field

[0001] This utility model relates to a heat dissipation support structure at the end of a stator coil. Background Technology

[0002] In the manufacturing process of large generators or motors, after the stator windings are embedded in the core slots, the coil ends (i.e., the exposed parts of the windings after exiting the slots) need to be fixed and organized using cable ties, sleeves, and supports. These structures are often tightly bundled and covered, restricting airflow between the coil bundles and preventing efficient heat dissipation. This can easily lead to localized overheating, causing serious faults such as insulation aging, conductor oxidation, and even electrical breakdown. Common structures have the following shortcomings:

[0003] 1) Disorganized and densely packed lead wires: The wire bundle has multiple strands arranged in a small space with no effective isolation between the wires, which easily leads to heat accumulation.

[0004] 2) Poor heat dissipation performance: Relying on natural cooling, there is almost no ventilation path between the wires, which leads to high temperature and easy aging of insulation;

[0005] 3) Lack of structural support: During operation, the motor is prone to loosening, displacement, or even mechanical damage due to electromagnetic vibration and thermal expansion.

[0006] 4) Assembly relies on manual experience and lacks standardized process guidance: there are no uniform standards for line spacing, lead-out direction of lead wires, and sleeve length, resulting in poor assembly efficiency and consistency. Utility Model Content

[0007] The purpose of this invention is to overcome the defects of the prior art and provide a heat dissipation support structure for the end of the stator coil, which facilitates smooth airflow at the end of the coil, significantly improves the heat sink capacity of the end of the coil, and enhances the structural stability of the end of the coil.

[0008] The purpose of this utility model is achieved as follows: a heat dissipation support structure for the end of a stator coil includes a wire outlet at the rear top of the housing, a stator winding embedded in a slot in the stator core, a coil end exposed on the rear end face of the stator core, and six winding leads; the first to third winding leads are led out from the coil end on the left side of the wire outlet, from far to near, and the fourth to sixth winding leads are led out from the coil end on the right side of the wire outlet, from far to near; the heat dissipation support structure also includes eight insulating supports, eight external binding wires, and phase sequence leads from T1 to T6; wherein,

[0009] The insulating bracket includes a horizontal part and a vertical part in the shape of a 7. Two through holes are opened at intervals on the horizontal part of the insulating bracket, and an upper flange is provided at the free end of the top surface of the insulating bracket. A lower flange is provided at the lower end of the outer side of the vertical part of the insulating bracket.

[0010] The inner side of the vertical part of the eight insulating brackets is close to the outer side of the coil end. The first to fourth insulating brackets are evenly distributed on the coil end on the left side of the outlet from far to near, and the fifth to eighth insulating brackets are distributed on the coil end on the right side of the outlet from far to near.

[0011] The first winding lead wire is coiled clockwise along the end of the coil and placed sequentially on the top surfaces of the first insulating bracket, the second insulating bracket, the third insulating bracket, and the fourth insulating bracket before being led out to the outlet; and the two through holes on the horizontal part of the first insulating bracket, the two through holes on the horizontal part of the second insulating bracket, the two through holes on the horizontal part of the third insulating bracket, and the two through holes on the horizontal part of the fourth insulating bracket are each tied tightly with an inner binding wire;

[0012] The second winding lead wire is wound clockwise along the end of the coil and passes through the bottom surface of the horizontal part of the third insulating bracket and the end face of the coil in sequence, and then leads out to the outlet.

[0013] The third winding lead wire is coiled clockwise along the end of the coil and rests against the outer side of the vertical part of the fourth insulating bracket before being led out to the outlet.

[0014] The fourth winding lead wire is coiled counterclockwise along the end of the coil and placed sequentially on the top surfaces of the fifth, sixth, seventh, and eighth insulating supports before being led out towards the outlet. The two through holes on the horizontal part of the fifth, sixth, seventh, and eighth insulating supports are each secured with an inner binding wire.

[0015] The fifth winding lead wire is coiled counterclockwise along the end of the coil and passes sequentially between the bottom surface of the transverse part of the seventh insulating bracket and the end face of the coil end, and between the bottom surface of the transverse part of the eighth insulating bracket and the end face of the coil end, before being led out to the outlet.

[0016] The sixth winding lead is coiled counterclockwise along the end of the coil and rests against the outer side of the vertical part of the eighth insulating bracket before being led out to the outlet.

[0017] Eight external binding wires are used to bind the wire bundles on the eight insulating supports and eight insulating supports to the ends of the coils in a corresponding manner.

[0018] The inner ends of the TI phase sequence lead, the inner ends of the T4 phase sequence lead, and the inner ends of the T2 phase sequence lead are each connected to the outer ends of the first winding lead, the second winding lead, and the third winding lead in a corresponding manner through copper pressure fittings in the outlet.

[0019] The inner ends of the T6 phase sequence lead, the T3 phase sequence lead, and the T5 phase sequence lead are each connected to the outer ends of the fourth winding lead, the fifth winding lead, and the sixth winding lead in a corresponding manner through copper crimping tubes within the outlet.

[0020] In the aforementioned heat dissipation support structure at the end of the stator coil, the outer surface of the vertical portion of the insulating bracket is a concave arc surface.

[0021] The aforementioned heat dissipation support structure at the end of the stator coil includes a copper crimping tube, one end of which is inserted into the inner end of a single phase sequence lead wire after the insulation layer has been removed; the other end of the copper crimping tube is inserted into the outer end of a single bundle of winding leads wire after the insulating varnish layer has been removed; two layers of pressure-sensitive tape are half-overlapped around the outer surface of the copper crimping tube, and a self-extinguishing sleeve is fitted on the outer surface of the pressure-sensitive tape.

[0022] The heat dissipation support structure at the end of the stator coil of this utility model has the following characteristics:

[0023] 1. Optimize ventilation path: By evenly arranging eight insulating supports at the end of the coil and orderly arranging the six bundle winding leads on the eight insulating supports, a convection channel is formed between the bundle winding leads and the end of the coil, making air circulation smoother, ensuring good ventilation and electrical safety, and significantly improving the heat sink capacity of the end of the coil.

[0024] 2. Enhanced structural stability: The winding leads are arranged in an orderly manner, and with the support and binding of multi-point insulation brackets, the winding leads of each layer are fixed to the insulation brackets with cable ties after being positioned layer by layer; the winding leads of each layer do not cross or overlap, and are separated by insulation brackets to avoid friction or contact caused by mechanical vibration, effectively preventing vibration, loosening and deformation of the motor during operation;

[0025] 3. Standardized installation and maintenance: All cable outlet positions, cable spacing, sleeve lengths and crimping methods are standardized to facilitate mass production and subsequent maintenance;

[0026] 4. Improved electrical performance: The winding leads are non-contacting, fully crimped, and clearly marked, significantly reducing the risk of electrical faults;

[0027] 5. High adaptability: It is suitable for large rotating motors with different pole numbers, capacities and linear profiles, and has good compatibility. Attached Figure Description

[0028] Figure 1 This is a plan view of the heat dissipation support structure at the end of the stator coil of this utility model;

[0029] Figure 2 This is a side view of the insulating bracket in the heat dissipation support structure at the end of the stator coil of this utility model;

[0030] Figure 3 yes Figure 1 View A in the middle;

[0031] Figure 4 yes Figure 3 BB view in the middle;

[0032] Figure 5 This is a detailed diagram of the connection structure between the winding leads and the phase sequence leads in the heat dissipation support structure at the end of the stator coil of this utility model. Detailed Implementation

[0033] The present invention will be further described below with reference to the accompanying drawings.

[0034] Please see Figures 1 to 5 The heat dissipation support structure at the end of the stator coil of this utility model includes a wire outlet at the top rear of the housing 1, a stator winding 2 embedded in the wire slot of the stator core 10, a coil end 20 exposed at the rear end face of the stator core 10, and also includes six winding lead wires 21 to 26, eight insulating supports 3, eight external binding wires 5, and phase sequence lead wires 11 to 6.

[0035] The first winding lead 21, the second winding lead 22, and the third winding lead 23 are led out from the coil end 20 on the left side of the outlet from far to near, while the fourth winding lead 24, the fifth winding lead 25, and the sixth winding lead 26 are led out from the coil end 20 on the right side of the outlet from far to near.

[0036] The insulating support 3 is composed of high-strength insulating material, taking into account both insulation and mechanical properties. The insulating support 3 includes a horizontal part 3a and a vertical part 3b in the shape of a "7". Two through holes 30 are opened at intervals on the horizontal part 3a of the insulating support 3, and an upper flange 3c is provided at the free end of the top surface of the insulating support 3. The slope of the vertical part 3b of the insulating support 3 is adapted to the slope of the outer side of the coil end 20, and the outer side of the vertical part 3b of the insulating support 3 is a concave arc surface. A lower flange 3d is provided at the lower end of the outer side of the vertical part 3b of the insulating support 3.

[0037] The inner side of the vertical portion 3b of the eight insulating brackets 3 is closely attached to the outer side of the coil end 20. Each insulating bracket 3 should be arranged in a slot. The first insulating bracket 3-1, the second insulating bracket 3-2, the third insulating bracket 3-3 and the fourth insulating bracket 3-4 are evenly distributed from far to near on the coil end 20 on the left side of the outlet. The fifth insulating bracket 3-5, the sixth insulating bracket 3-6, the seventh insulating bracket 3-7 and the eighth insulating bracket 3-8 are arranged from far to near on the coil end 20 on the right side of the outlet.

[0038] After being marked, the first winding lead 21 is wound clockwise along the coil end 20 and placed sequentially on the top surfaces of the first insulating bracket 3-1, the second insulating bracket 3-2, the third insulating bracket 3-3, and the fourth insulating bracket 3-4 before being led out towards the outlet. The two through holes 30 on the transverse portion 3a of the first insulating bracket 3-1, the two through holes 30 on the transverse portion 3a of the second insulating bracket 3-2, the two through holes 30 on the transverse portion 3a of the third insulating bracket 3-3, and the two through holes 30 on the transverse portion 3a of the fourth insulating bracket 3-4 each pass through the inner... The binding wire 4 binds the first winding lead wire 21 3 to 4 times to ensure that it is tightly bound to the first winding lead wire 21 and does not loosen. The upper flange 3c and inner binding wire 4 on the top surface of the first insulating bracket 3-1, the upper flange 3c and inner binding wire 4 on the top surface of the second insulating bracket 3-2, the upper flange 3c and inner binding wire 4 on the top surface of the third insulating bracket 33, and the upper flange 3c and inner binding wire 4 on the top surface of the fourth insulating bracket 3-4 work together to prevent the first winding lead wire 21 (the second layer winding lead wire) from sliding sideways into the stator core 10 and rubbing against the rotating parts.

[0039] After being marked, the second winding lead 22 is wound clockwise along the coil end 20 and passes through the bottom surface of the transverse part 3a of the third insulating bracket 3-3 and the end surface of the coil end 20 and the bottom surface of the transverse part 3a of the fourth insulating bracket 34 and the end surface of the coil end 20 in sequence, and then leads out to the outlet; the second winding lead 22 serves as the first layer winding lead.

[0040] After the third winding lead 23 is marked, it is coiled clockwise along the end 20 of the coil and rests against the outer side of the vertical part 3b of the fourth insulating bracket 3-4 before being led out towards the outlet; the lower flange 3d at the lower end of the outer side of the vertical part 3b of the fourth insulating bracket 3-4 is used to prevent the third winding lead 26 (third layer winding lead) from slipping off.

[0041] After being marked, the fourth winding lead 24 is coiled counterclockwise along the coil end 20 and placed sequentially on the top surfaces of the fifth insulating bracket 3-5, the sixth insulating bracket 3-6, the seventh insulating bracket 3-7, and the eighth insulating bracket 3-8 before being led out towards the outlet. Furthermore, the two through holes 30 on the transverse portion 3a of the fifth insulating bracket 3-5, the sixth insulating bracket 3-6, the seventh insulating bracket 3-7, and the eighth insulating bracket 3-8, respectively, are each connected to the fourth winding lead 24 via an inner binding wire 4. Bind 3 to 4 times to ensure that it is tightly bound to the fourth winding lead 24 and does not loosen; the upper flange 3c and inner binding line 4 on the top surface of the fifth insulating bracket 3-5, the upper flange 3c and inner binding line 4 on the top surface of the sixth insulating bracket 3-6, the upper flange 3c and inner binding line 4 on the top surface of the seventh insulating bracket 3-7, and the upper flange 3c and inner binding line 4 on the top surface of the eighth insulating bracket 3-8 work together to prevent the fourth winding lead 24 (the second layer winding lead) from sliding sideways into the stator core 10 and rubbing against the rotating parts.

[0042] After being marked, the fifth winding lead 25 is coiled counterclockwise along the end of the coil 20 and passes sequentially between the bottom surface of the transverse part 3a of the seventh insulating bracket 3-7 and the end surface of the coil end 20, and between the bottom surface of the transverse part 3a of the eighth insulating bracket 3-8 and the end surface of the coil end 20, before being led out to the outlet; the fifth winding lead 25 serves as the first layer winding lead.

[0043] After being marked, the sixth winding lead 26 is coiled counterclockwise along the coil end 20 and rests against the outer side of the vertical part 3b of the eighth insulating bracket 3-8 before being led out towards the outlet. The lower flange 3d at the lower end of the outer side of the vertical part 3b of the eighth insulating bracket 3-8 is used to prevent the sixth winding lead 26 (the third layer winding lead) from slipping off.

[0044] Eight external binding wires 5 bind the eight insulating supports 3 and the eight insulating supports 3 to the coil end 20 in a one-to-one correspondence, forming a stable structural frame for the coil end.

[0045] The inner ends of the TI phase sequence lead, the T4 phase sequence lead, and the T2 phase sequence lead are connected to the outer ends of the first winding lead 21, the second winding lead 22, and the third winding lead 23 respectively through copper pressure fittings 6 in the outlet.

[0046] The inner ends of the T6 phase sequence lead, the T3 phase sequence lead, and the T5 phase sequence lead are connected to the outer ends of the fourth winding lead 24, the fifth winding lead 25, and the sixth winding lead 26 respectively through copper pressure fittings 6 at the outlet.

[0047] One end of the copper crimp connector 6 is inserted into the inner end of a single phase sequence lead after the insulation layer has been removed; the other end of the copper crimp connector 6 is inserted into the outer end of a single bundle of winding leads after the insulation varnish layer has been removed; two layers of pressure-sensitive tape 61 are half-overlapped around the outer surface of the copper crimp connector 6, and the pressure-sensitive tape 61 should cover the overlapping area of ​​the copper crimp connector 6 of the phase sequence lead and the winding lead, and copper wires are not allowed to be exposed; and a self-extinguishing sleeve 62 is fitted on the outer surface of the pressure-sensitive tape 61. After a section of insulation layer has been removed from the inside of each phase sequence lead, the inner end is inserted into one end of a copper crimp connector 6; after a section of insulation varnish layer has been removed from the outside of each bundle of winding leads, the outer end is inserted into the other end of the corresponding copper crimp connector 6; two layers of pressure-sensitive tape 61 are half-overlapped between the inside of each phase sequence lead, the copper crimp connector 6, and the outside of each bundle of winding leads, and then a self-extinguishing sleeve 62 is fitted on the outside of the pressure-sensitive tape 61.

[0048] In the heat dissipation support structure of the stator coil end of this utility model, during manufacturing, the first layer of winding leads are close to the end face of the coil end 20 and the bottom surface of the transverse part 3a of the insulating bracket 3. These are the wire bundles that are preferentially led out and are generally arranged and fixed first. This layer is also the base layer for the installation of the insulating bracket 3. The second layer of winding leads is arranged on the top surface of the insulating bracket 3, above the first layer of winding leads. The insulating bracket 3 provides a plane support, and the second layer of winding leads does not directly contact the first layer of winding leads. The third layer of winding leads (outer layer) is arranged in the lower area of ​​the outer side of the insulating bracket 3. The outer side of the insulating bracket 3 and the lower flange 3d serve as the limiting base, and the third layer of winding leads does not exceed the height of the second layer of winding leads to avoid outward protrusion and affecting the cooling space.

[0049] There is a physical height difference between the three layers of winding leads in the vertical direction, forming a "step-like" wiring structure, which creates an orderly layered structure. Each layer of winding leads is isolated by air gaps or insulating sleeves to ensure good ventilation and electrical safety, which is conducive to smooth airflow and structural stability.

[0050] Each layer of winding leads is fixed with cable ties after being positioned layer by layer; the wire bundles of each layer of winding leads do not cross or overlap, and are separated by insulating bracket 3 to avoid friction or contact caused by mechanical vibration.

[0051] The above embodiments are for illustrative purposes only and are not intended to limit the present invention. Those skilled in the art can make various changes or modifications without departing from the spirit and scope of the present invention. Therefore, all equivalent technical solutions should also fall within the scope of the present invention and should be defined by the claims.

Claims

1. A heat dissipation support structure for the end of a stator coil, comprising a wire outlet at the rear top of a housing, a stator winding embedded in a slot in the stator core, a coil end exposed at the rear end face of the stator core, and six winding leads; the first to third winding leads are led out from the coil end on the left side of the wire outlet in descending order of distance, and the fourth to sixth winding leads are led out from the coil end on the right side of the wire outlet in descending order of distance; characterized in that, The heat dissipation support structure also includes eight insulating brackets, eight external binding wires, and TI~T6 phase sequence lead wires. The insulating bracket includes a horizontal part and a vertical part in the shape of a 7. Two through holes are opened at intervals on the horizontal part of the insulating bracket, and an upper flange is provided at the free end of the top surface of the insulating bracket. A lower flange is provided at the lower end of the outer side of the vertical part of the insulating bracket. The inner side of the vertical part of the eight insulating brackets is close to the outer side of the coil end. The first to fourth insulating brackets are evenly distributed on the coil end on the left side of the outlet from far to near, and the fifth to eighth insulating brackets are distributed on the coil end on the right side of the outlet from far to near. The first winding lead wire is coiled clockwise along the end of the coil and placed sequentially on the top surfaces of the first insulating bracket, the second insulating bracket, the third insulating bracket, and the fourth insulating bracket before being led out to the outlet; and the two through holes on the horizontal part of the first insulating bracket, the two through holes on the horizontal part of the second insulating bracket, the two through holes on the horizontal part of the third insulating bracket, and the two through holes on the horizontal part of the fourth insulating bracket are each tied tightly with an inner binding wire; The second winding lead wire is wound clockwise along the end of the coil and passes through the bottom surface of the horizontal part of the third insulating bracket and the end face of the coil in sequence, and then leads out to the outlet. The third winding lead wire is coiled clockwise along the end of the coil and rests against the outer side of the vertical part of the fourth insulating bracket before being led out to the outlet. The fourth winding lead wire is coiled counterclockwise along the end of the coil and placed sequentially on the top surfaces of the fifth, sixth, seventh, and eighth insulating supports before being led out towards the outlet. The two through holes on the horizontal part of the fifth, sixth, seventh, and eighth insulating supports are each secured with an inner binding wire. The fifth winding lead wire is coiled counterclockwise along the end of the coil and passes sequentially between the bottom surface of the transverse part of the seventh insulating bracket and the end face of the coil end, and between the bottom surface of the transverse part of the eighth insulating bracket and the end face of the coil end, before being led out to the outlet. The sixth winding lead is coiled counterclockwise along the end of the coil and rests against the outer side of the vertical part of the eighth insulating bracket before being led out to the outlet. Eight external binding wires are used to bind the wire bundles on the eight insulating supports and eight insulating supports to the ends of the coils in a corresponding manner. The inner ends of the TI phase sequence lead, the inner ends of the T4 phase sequence lead, and the inner ends of the T2 phase sequence lead are each connected to the outer ends of the first winding lead, the second winding lead, and the third winding lead in a corresponding manner through copper pressure fittings in the outlet. The inner ends of the T6 phase sequence lead, the T3 phase sequence lead, and the T5 phase sequence lead are each connected to the outer ends of the fourth winding lead, the fifth winding lead, and the sixth winding lead in a corresponding manner through copper crimping tubes within the outlet.

2. The heat dissipation support structure at the end of the stator coil according to claim 1, characterized in that, The outer surface of the vertical part of the insulating bracket is a concave arc surface.

3. The heat dissipation support structure at the end of the stator coil according to claim 1, characterized in that, One end of the copper crimping connector is inserted into the inner end of a single phase sequence lead after the insulation layer has been removed; the other end of the copper crimping connector is inserted into the outer end of a single bundle of winding leads after the insulation varnish layer has been removed; two layers of pressure-sensitive tape are half-overlapped around the outer surface of the copper crimping connector, and a self-extinguishing sleeve is fitted on the outer surface of the pressure-sensitive tape.

Images