Motor winding end fixing structure
By adopting a fixed structure of support components, end hoops and insulating tying ropes at the end of the motor winding, the vibration and insulation damage caused by the unstable winding are solved, and higher fixing strength and longer motor service life are achieved.
Patent Information
- Application Number
- CN202420832281.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-19
- Publication Date
- 2025-02-11
- Estimated Expiration
- 2034-04-19
AI Technical Summary
Due to the insecure fixation of the motor winding, vibration and insulation damage, which in turn causes problems such as electrical corrosion, discharge and coil insulation cracking.
The end fixing structure of the motor winding includes support components, end hoops and insulating tying ropes is adopted. The end of the winding is fixed on the support component through the insulating tying ropes, and the end of the winding is tied to the end hoops to increase the structural strength and pass through immersion. The paint forms a whole to increase the fixed strength.
It effectively reduces vibration when the motor rotates at high speed, improves the fixing strength of the winding ends, extends the service life of the motor and avoids insulation damage and discharge.
Smart Images
Figure CN222464278U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of motors, and in particular to a motor winding end fixing structure. Background Art
[0002] Under the action of electromagnetic force, thermal stress and mechanical force, the motor winding often vibrates and deforms due to loose winding fixation, resulting in mechanical damage or loose cracking of insulation. Loose winding fixation or vibration produces the following negative effects:
[0003] 1. The vibration of the coil in the slot will lead to poor contact, increase the potential on the coil surface, and in severe cases, electrical corrosion will occur, causing insulation wear and even copper exposure.
[0004] 2. The end of the stator winding will be displaced by the electromagnetic force and change the spacing between the coils. The spacing between some coils will be reduced, causing the original non-uniform electric field to become a deformed electric field. The potential will rise instantly, leading to discharge or even breakdown. The long-term displacement will also cause the coil insulation to crack or break, directly affecting the service life of the motor.
[0005] At present, the motor winding is only fixed at the bevel of the winding end, which causes the motor winding to be loosely fixed and vibrate. For example, the 2P motor is subjected to electromagnetic tension and motor vibration during operation, and the insulation surface of the stator winding end often has a high potential, especially when overvoltage attacks, the potential of the winding end surface will be higher, causing discharge or creepage between the stator winding end relative to adjacent components and grounded components. Utility Model Content
[0006] The problem solved by the utility model is: how to increase the fixing strength of the winding end to reduce the vibration generated when the motor rotates at high speed.
[0007] In order to solve the above problems, the utility model provides a motor winding end fixing structure, including a supporting component, an end hoop and an insulating binding rope, one end of the supporting component is fixed to the pressure ring surface of the winding, the oblique edge and the flat edge of the winding end of the winding are fixed to the supporting component by at least one insulating binding rope, the end hoop is arranged on the circumference of the end of the winding, and the winding end is tied to the end hoop.
[0008] Optionally, a nose filling tube is provided at the winding end, and the nose filling tube passes through the winding ends of multiple winding ends to form a ring structure.
[0009] Optionally, the nose filling tube is fixed to the winding end by varnishing.
[0010] Optionally, the nose filling tube is fixed to the winding end by an insulating braided rope.
[0011] Optionally, it also includes an intra-phase connecting wire, which is fixed to the nasal filling tube through an insulating braided rope.
[0012] Optionally, the end hoop is connected to the winding end and then the whole is dipped in paint to form an annular entity, and the nose filling tube is dipped in paint to form a part of the annular entity.
[0013] Optionally, a notch is provided on the surface of the pressure ring, the winding end is led out through the notch, a notch pad is embedded in the notch, and the notch pad is used to fix the winding end at the notch.
[0014] Optionally, the positions of the plurality of notches correspond one-to-one to the lead-out positions of the plurality of winding ends.
[0015] Optionally, the insulating binding rope is arranged on the flat edge and the oblique edge of the winding end, and the insulating binding rope is used to connect the winding end with at least one of the supporting components or a part of the supporting component.
[0016] Optionally, the insulating binding rope and the insulating braided rope both include glass fibers and polyester.
[0017] Compared with the prior art, the motor winding end fixing structure of the utility model has the following beneficial effects:
[0018] In the utility model, the winding end is fixed to the supporting component by at least one insulating binding rope, so that the winding end can be connected to the supporting component and maintained in a fixed state. The winding end can also be connected to multiple supporting components or multiple positions of the supporting component, further increasing the fixing effect of the winding end; the winding end is tied to the end hoop, which increases the structural strength of the winding end. After the winding end is dipped in paint to form a whole, the fixing strength of the winding end is improved, thereby reducing the vibration generated when the motor rotates. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 This is a schematic diagram of the structure of the motor winding end fixing structure in the embodiment of the utility model;
[0020] Figure 2 This is a schematic diagram of the installation of the notch pad in the embodiment of the utility model;
[0021] Description of reference numerals:
[0022] 1. Winding; 2. Pressing ring; 3. Intra-phase connecting wire; 4. Notch pad; 5. Support component; 6. Insulating binding rope; 7. Nose filling tube; 8. Insulating braided rope; 9. End hoop; 11. Winding end; 21. Notch; 110. Bevel edge; 111. Flat edge. DETAILED DESCRIPTION
[0023] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and understandable, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.
[0024] It should be noted that the terms "first", "second", etc. in the specification and claims of the present utility model and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the utility model described herein can be implemented in an order other than those illustrated or described herein.
[0025] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0026] In the description of this specification, the description with reference to the terms "embodiment", "one embodiment" and "one implementation" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or implementation are included in at least one embodiment or implementation of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or implementation. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or implementations in a suitable manner.
[0027] like Figure 1 As shown, an embodiment of the utility model provides a motor winding end fixing structure, including a support component 5, an end hoop 9 and an insulating binding rope 6, one end of the support component 5 is fixed to the surface of the pressure ring 2 of the winding 1, and the oblique edge 110 and the flat edge 111 of the winding end 11 of the winding 1 are fixed to the support component 5 by at least one of the insulating binding ropes 6, the end hoop 9 is arranged on the circumference of the end of the winding 1, and the winding end 11 is tied to the end hoop 9.
[0028] It should be noted that the winding 1 generally has a plurality of winding ends 11, and the plurality of winding ends 11 are evenly distributed around the axis of the winding 1. Figure 1Only the radial half structure of the motor winding is shown, and a winding end 11 is schematically drawn; during the manufacturing process of the winding 1, the winding 1 needs to be dipped in paint. Specifically, on the one hand, the dip in paint absorbs the moisture existing in the pores of the slot insulation, interlayer insulation, phase insulation, binding and other positions in the winding 1 to avoid reducing its own insulation performance, and is used to enhance the moisture-proof and anti-corrosion properties of the winding 1, so that the motor winding end has insulation performance, and at the same time, the components without insulation function can achieve the insulation effect, such as the motor's phase connecting wire 3 and the winding end 11. On the other hand, the insulating paint is filled between various insulating materials, so that the insulation strength of the winding 1 is higher than that before the dip in paint, and the electrical insulation strength of the winding 1 is enhanced. For example, the end hoop 9 and the winding end 11 and the insulating binding rope 6 form a whole after the dip in paint.
[0029] Secondly, the support components 5 are distributed in a ring shape and are evenly arranged along the surface of the pressure ring 2 with the axis of the winding 1 as the center. For example, the support components 5 can correspond to the winding ends 1 one by one, so that multiple winding ends 11 of the winding 1 can be fixed to the corresponding support components 5 through the insulating binding rope 6, so that a single winding end 11 can be independently fixed to the support component 5, and then the adjacent winding ends 11 are kept at a certain distance, which can avoid the discharge phenomenon caused by the adjacent parts of the winding ends 11 being too close. At the same time, after the winding 1 is dipped in paint, the fixing strength is increased, and the vibration generated by the motor during operation is reduced.
[0030] It should be further explained that the support component 5 can be annular or strip-shaped. When the support component 5 is annular, it is arranged around the axis of the winding 1, and its surface is evenly provided with positions for the insulating binding rope 6 to be bound. A winding end 11 can be fixed to the binding position of the support component 5 by multiple insulating binding ropes 6, thereby increasing the fixing effect of the winding end 11. When the support component 5 is strip-shaped, it has multiple ones, and they are evenly distributed along the surface of the pressure ring 2 with the axis of the winding 1 as the center. The insulating binding rope 6 can be used to connect and fix the corresponding support component 5, and the insulating binding rope 6 can also be used to connect and fix multiple support components 5, thereby increasing the fixing effect of the winding end 11.
[0031] The end hoop 9 is usually fixed to the end of the winding 1 through an end hoop bracket. The annular end hoop 9 surrounds the outer sides of multiple winding ends 11, and acts as a clamp for the multiple winding ends 11. When the winding end 11 is fixed to the end hoop 9 through the insulating binding rope 6, the winding end 11 can be temporarily fixed, which is convenient for the later paint dipping treatment of the winding end 11, which is beneficial to the subsequent production of the winding 1.
[0032] like Figure 1As shown, under normal circumstances, an insulating binding rope 6 is provided on the oblique side 110 of the winding end 11 and is bound and fixed to the supporting component 5, which directly leads to insufficient connection strength between the winding end 11 and the supporting component 5, further causing vibration during the operation of the motor, thereby affecting the service life of the motor.
[0033] Optionally, in this embodiment, the insulating binding rope 6 is arranged on the flat edge 111 and the oblique edge 110 of the winding end 11, and the insulating binding rope 6 is used to connect the winding end 11 with at least one of the supporting components 5 or a part of the supporting component 5. In this embodiment, taking the supporting component 5 in a strip shape as an example, a plurality of insulating binding ropes 6 are arranged on the winding end 11, and the insulating binding ropes 6 are connected and fixed to the plurality of supporting components 5 at the same time, so as to further improve the stability of the winding end 11, and during the varnishing process, the fixing effect of the winding end 11 and the structural strength of the winding end 11 after the varnishing are completed can be ensured.
[0034] Furthermore, if Figure 1 As shown, in this embodiment, a plurality of insulating binding ropes 6 are arranged on the oblique edge 110 of the winding end 11, so that the insulating binding ropes 6 are connected to the supporting component 5, thereby improving the fixing effect of the winding end 11. It should be noted that a plurality of insulating binding ropes 6 are also arranged on the flat edge 111 of the winding end 11, and the insulating binding ropes 6 on the flat edge 111 of the winding end 11 can be connected and fixed to the supporting component 5 at the same time, so that the connection strength of the winding end 11 can be further improved, and when the motor winding is dipped in paint, the motor winding 11 can maintain the current fixed shape, and at the same time improve the overall structural strength of the winding end 11.
[0035] Reference Figure 1 Further, a nose filling tube 7 is provided at the winding end 11, and the nose filling tube 7 is passed through the winding ends 11 to form a ring structure. The nose filling tube 7 is tubular and is provided at the winding end (nose) of the winding end 11. The nose filling tube 7 is used to connect multiple winding ends 11 of the winding 1 in series and form a ring structure, so that the winding ends 11 are arranged in order. After being dipped in paint, the multiple winding ends 11 can be formed into a whole.
[0036] In this embodiment, the nose filling tube 7 is fixed to the winding end 11. Optionally, there are two fixing methods, one of which is that the nose filling tube 7 is directly fixed to the winding end 11 by dipping in the subsequent dipping process. This fixing method does not require the nose filling tube 7 to be fixed in position, which improves the dipping efficiency, but the position of the nose filling tube 7 during the dipping process is difficult to control;
[0037] The second is to fix the nose filling tube 7 to the winding end 11 by the insulating braided rope 8. For the second fixing method of the nose filling tube 7, the nose filling tube 7 is first fixed by the insulating braided rope 8 and then the paint dipping operation step is performed, so that the nose filling tube 7 is pre-fixed to the winding end 11, so that the strength of the winding end 11 is uniform and the quality is stable during the paint dipping. In this embodiment, the insulating braided rope 8 is used to fix the nose filling tube 7 first and then the paint dipping operation step is performed, so that the winding end 11 has sufficient connection strength, reducing the negative effects caused by the vibration of the motor during operation.
[0038] Optionally, when the nose filling tube 7 is fixed to the winding end 11 by the insulating braided rope 8, the nose filling tube can be cylindrical. Through the circumferential distribution of the cylindrical nose filling tube 7, the nose filling tube 7 is placed in the detour (nose) of the winding end 11 and fixed as a whole with the winding end 11. After being dipped in paint, it is completely fixed to the winding end 11 to play a fixing role.
[0039] Furthermore, the intra-phase connecting wire 3 is fixed to the nose filling tube 7 by an insulating braided rope 8. The intra-phase connecting wire 3 is fixed to the insulating braided rope 8 by the insulating braided rope 8, so that the intra-phase connecting wire 3 can be fixed. The intra-phase connecting wire 3 can be fixed to the end hoop 9 in an orderly manner. In the winding varnishing process, the intra-phase connecting wire 3 and the winding 1 can be fixed to form a whole, avoiding the disorderly distribution of the intra-phase connecting wire, and at the same time, the overall strength of the winding end 11 after varnishing can be improved, avoiding the wear of the intra-phase connecting wire 3 during the continuous vibration of the motor.
[0040] In combination with the above, optionally, the end hoop 9 is connected to the winding end 11 and then the whole is dipped in paint to form an annular whole, and the nose filling tube 7 is dipped in paint to form a part of the annular whole, so as to improve the structural strength of the annular whole.
[0041] The current motor winding varnishing process varnishes the winding end 11 to form a ring-shaped whole. Varnishing is an important process for fixing the motor winding end. In this embodiment, the end hoop 9 is connected to the winding end 11 and then the whole is varnished to form a ring-shaped whole. It should be noted that the ring-shaped whole is a glass fiber reinforced plastic ring. Specifically, since the insulating braided rope 8 fixes the intra-phase connecting wire 3 to the end hoop 9 and a plurality of insulating binding ropes 6 are provided on the winding end 11, and the insulating binding rope 6 is connected to the end hoop 9, the nose filling tube 7 is also fixed to the winding end 11 through the insulating braided rope 8. Normally, the insulating binding rope 6 and the insulating braided rope 8 both include glass fibers and polyester. Of course, other materials can also be used to manufacture the insulating binding rope 6 and the insulating braided rope 8 if the insulation requirements are met. In this embodiment, the insulating binding rope 6 and the insulating braided rope 8 use the above two materials as examples. For example, the insulating braided rope 8 is woven from glass fibers and polyester to give it insulating properties. Therefore, after the winding 1 undergoes the paint dipping process, due to the material of the insulating binding rope 6 and the insulating braided rope 8, and the insulating paint or insulating glue used for the paint dipping, the winding end 11 is formed as a fiberglass ring as a whole. In some cases, it is not a fiberglass ring, but the shape of the winding end 11 after the paint dipping process is ring-shaped.
[0042] like Figure 2 As shown, a notch 21 is provided on the surface of the pressing ring 2, and the winding end 11 is led out through the notch 21. A notch pad 4 is embedded in the notch 21, and the notch pad 4 is used to fix the winding end 11 at the notch 21.
[0043] The pressing ring 2 is arranged at the end of the winding 1 to fix the main part of the winding 1. A notch 21 is arranged on the pressing ring 2 to allow the winding end 11 to be led out from the corresponding notch 21. It should be noted that Figure 2 Only one notch 21 and the corresponding winding end 11 are schematically drawn. In fact, the notch 21 can be evenly arranged on the surface of the pressing ring 2 according to the distribution of the winding end 11. Furthermore, the positions of the plurality of notches 21 correspond to the lead-out positions of the plurality of winding ends 11. The winding ends 11 are distributed in a ring shape after being led out from the notch 21, and a notch pad 4 is embedded in each notch 21. The notch pad 4 is used to fix the winding end 1 at the notch 21 so that the winding end 11 can maintain the corresponding position.
[0044] Although the utility model is disclosed as above, the protection scope of the utility model is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the utility model, and these changes and modifications will fall within the protection scope of the utility model.
Claims
1. A motor winding end fixing structure, characterized in that: The invention comprises a supporting component (5), an end hoop (9) and an insulating binding rope (6), wherein one end of the supporting component (5) is fixed to the surface of a pressure ring (2) of a winding (1), and both the oblique edge (110) and the flat edge (111) of the winding end (11) of the winding (1) are fixed to the supporting component (5) by at least one insulating binding rope (6), and the end hoop (9) is arranged in the circumferential direction of the end of the winding (1), and the winding end (11) is bound to the end hoop (9).
2. The motor winding end fixing structure according to claim 1, characterized in that: A nose filling tube (7) is provided at the winding part of the winding end (11), and the nose filling tube (7) passes through a plurality of winding parts of the winding end (11) to form a ring structure.
3. The motor winding end fixing structure according to claim 2, characterized in that: The nose filling tube (7) is fixed to the winding end (11) by varnish dipping.
4. The motor winding end fixing structure according to claim 2, characterized in that: The nose filling tube (7) is fixed to the winding end (11) via an insulating braided rope (8).
5. The motor winding end fixing structure according to claim 4, characterized in that: It also includes an intra-phase connecting wire (3), and the intra-phase connecting wire (3) is fixed to the nose filling tube (7) through an insulating braided rope (8).
6. The motor winding end fixing structure according to claim 5, characterized in that: The end hoop (9) is connected to the winding end (11) and then dipped in varnish to form an annular whole. The nose filling tube (7) is dipped in varnish to form a part of the annular whole.
7. The motor winding end fixing structure according to claim 1, characterized in that: A notch (21) is provided on the surface of the pressing ring (2), the winding end (11) is led out through the notch (21), a notch pad (4) is embedded in the notch (21), and the notch pad (4) is used to fix the winding end (11) at the notch (21).
8. The motor winding end fixing structure according to claim 7, characterized in that: The positions of the plurality of notches (21) correspond one-to-one to the lead-out positions of the plurality of winding ends (11).
9. The motor winding end fixing structure according to any one of claims 1 to 8, characterized in that: The insulating binding rope (6) is arranged on the flat side (111) and the oblique side (110) of the winding end (11), and the insulating binding rope (6) is used to connect the winding end (11) to at least one of the supporting components (5) or a part of the supporting component (5).
10. The motor winding end fixing structure according to claim 5, characterized in that: The insulating binding rope (6) and the insulating braided rope (8) both comprise glass fibers and polyester.