阅读说明：本技术 一种定子槽部组件及其制造方法 (Stator slot assembly and manufacturing method thereof ) 是由 杨振中 袁双玲 凌翠平 于 2019-09-19 设计创作，主要内容包括：本发明公开了一种定子槽部组件,包括铁心槽和嵌设于铁心槽内的定子线圈,定子线圈的圆角和铁心槽的槽壁之间的间隙内设有填充物,填充物具有适形性和绝缘性。相比于现有技术仅依靠绝缘漆填充来弥补该间隙,采用填充物填充的方式,可以弥补绝缘漆填充的不足,改善绝缘漆在定子线圈的圆角和铁心槽的槽壁之间的间隙内的填充效果,消除定子铁心燕尾部位与线圈圆角处存在的空气间隙,从而可避免电机在长时间运行过程中产生绝缘放电击穿的问题,提高了电机定子绕组对地绝缘的可靠性。本发明还公开了一种上述定子槽部组件的制造方法。(The invention discloses a stator slot component, which comprises an iron core slot and a stator coil embedded in the iron core slot, wherein a filler is arranged in a gap between a fillet of the stator coil and a slot wall of the iron core slot, and the filler has conformability and insulativity. Compared with the prior art, the gap is only filled by insulating paint, the mode of filling the filler is adopted, the defect of filling the insulating paint can be overcome, the filling effect of the insulating paint in the gap between the fillet of the stator coil and the groove wall of the iron core groove is improved, the air gap between the dovetail part of the stator core and the fillet of the coil is eliminated, the problem that the motor generates insulation discharge breakdown in the long-time running process is solved, and the reliability of the ground insulation of the motor stator winding is improved. The invention also discloses a manufacturing method of the stator slot component.)

1. A stator slot assembly is characterized by comprising an iron core slot (1) and a stator coil (2) embedded in the iron core slot (1), wherein a filler (3) is arranged in a gap between a fillet of the stator coil (2) and a slot wall of the iron core slot (1), and the filler (3) has conformability and insulativity.

2. A stator slot assembly according to claim 1, characterized in that the filler (3) comprises aramid fiber rope.

3. A stator slot assembly according to claim 1 or 2, wherein slot insulation for wrapping the stator coil (2) is folded over the surface of the stator coil (2) at the slots of the core slot (1) wrapped and butt-sealed to the stator coil (2).

4. A stator slot assembly according to claim 3, characterized in that between the slot wedge (4) for covering the slot opening of the core slot (1) and the stator coil (2) there is provided:

a first filler strip (5) used for insulating and butting with the notch in the length direction;

the lid is located first filler strip (5) and folding back second filler strip (6) of wrapping the insulating top of notch, second filler strip (6) are located slot wedge (4) with between first filler strip (5).

5. A method of manufacturing a stator slot assembly, comprising:

embedding the stator coil in the iron core slot;

and filling a filler with conformability and insulativity into a gap between the fillet of the stator coil and the slot wall of the iron core slot.

6. The method of manufacturing a stator slot assembly as defined in claim 5, further comprising, after filling the gap between the fillet of the stator coil and the slot wall of the core slot with a filler having conformability and insulation properties:

and insulating the slot opening used for binding the stator coil, attaching the surface of the stator coil to the slot opening of the iron core slot, folding and binding the stator coil, and insulating, butting and sealing the slot opening.

7. The method of manufacturing a stator slot assembly as defined in claim 6, further comprising, after said insulating the slot opening for wrapping the stator coil at the slot opening of the core slot, applying a surface of the stator coil to the stator coil by folding and wrapping, the stator slot assembly further comprising:

placing a first gasket strip at the notch of the iron core slot, and enabling the first gasket strip to be in insulation butt joint with the notch in the length direction;

placing a second pad strip on the first pad strip and the notch insulation after folding and wrapping;

and installing a slot wedge into the notch of the iron core slot so that the slot wedge presses the second gasket strip.

Technical Field

The invention relates to the technical field of motor stators, in particular to a stator slot component. In addition, the invention also relates to a manufacturing method of the stator slot component.

Background

Stator slot subassembly includes iron core slot, coil, filler strip and slot wedge etc. usually, and the stator coil preparation back can form the fillet naturally in the notch department of iron core slot, and can form certain clearance between coil fillet and the iron core slot.

Disclosure of Invention

In view of the above, an object of the present invention is to provide a stator slot assembly that can eliminate a gap between a stator slot coil and a core, and improve reliability of ground insulation of a stator winding of an electric machine.

Another object of the present invention is to provide a method for manufacturing the above stator slot assembly, which can eliminate the gap between the stator slot coil and the core, and improve the reliability of the ground insulation of the stator winding of the motor.

In order to achieve the above purpose, the invention provides the following technical scheme:

a stator slot assembly comprises an iron core slot and a stator coil embedded in the iron core slot, wherein a filler is arranged in a gap between a fillet of the stator coil and a slot wall of the iron core slot, and the filler has conformability and insulativity.

Preferably, the filler comprises aramid fiber rope.

Preferably, the slot insulation for wrapping the stator coil is attached to the surface of the stator coil at the slot of the core slot, folded, wrapped and butt-sealed on the stator coil.

Preferably, a slot wedge for covering the slot opening of the core and the stator coil are provided with:

the first gasket strip is used for being in insulation butt joint with the notch in the length direction;

the cover is arranged on the first filler strip and the second filler strip which is folded and bound and arranged above the slot opening insulation, and the second filler strip is positioned between the slot wedge and the first filler strip.

A method of manufacturing a stator slot assembly, comprising:

embedding the stator coil in the iron core slot;

and filling a filler with conformability and insulativity into a gap between the fillet of the stator coil and the slot wall of the iron core slot.

Preferably, after the filler having conformability and insulation is filled in the gap between the fillet of the stator coil and the slot wall of the core slot, the method further includes:

and insulating the slot opening used for binding the stator coil, attaching the surface of the stator coil to the slot opening of the iron core slot, folding and binding the stator coil, and insulating, butting and sealing the slot opening.

Preferably, after the insulating of the slot for wrapping the stator coil is attached to the surface of the stator coil at the slot of the core slot, the method further includes:

placing a first gasket strip at the notch of the iron core slot, and enabling the first gasket strip to be in insulation butt joint with the notch in the length direction;

placing a second pad strip on the first pad strip and the notch insulation after folding and wrapping;

and installing a slot wedge into the notch of the iron core slot so that the slot wedge presses the second gasket strip.

According to the stator slot component provided by the invention, the gap between the fillet of the stator coil and the slot wall of the iron core slot is filled by the filler, compared with the prior art that the gap is filled only by insulating paint, the defect of insulating paint filling can be made up by adopting a filler filling mode, the filling effect of the insulating paint in the gap between the fillet of the stator coil and the slot wall of the iron core slot is improved, and the air gap between the dovetail part of the stator iron core and the fillet of the coil is eliminated, so that the problem of insulation discharge breakdown of a motor in the long-time operation process can be avoided, and the reliability of ground insulation of the stator winding of the motor is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

FIG. 1 is a schematic view of a portion of a stator slot assembly according to an embodiment of the present invention;

fig. 2 is a flow chart of a method of manufacturing a stator slot assembly according to an embodiment of the present invention.

The reference numerals in fig. 1 are as follows:

1 is an iron core slot, 2 is a stator coil, 3 is a filler, 4 is a slot wedge, 5 is a first filler strip, and 6 is a second filler strip.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The core of the invention is to provide a stator slot component which can eliminate the gap between a stator slot coil and an iron core and improve the reliability of ground insulation of a motor stator winding. The other core of the invention is to provide a manufacturing method of the stator slot component, which can eliminate the gap between the stator slot coil and the iron core and improve the reliability of the ground insulation of the motor stator winding.

Fig. 1 is a schematic partial structural view of a stator slot assembly according to an embodiment of the present invention.

The invention provides a stator slot assembly, which comprises an iron core slot 1, a stator coil 2 and a filler 3, wherein the stator coil 2 is embedded in the iron core slot 1, the filler 3 is filled in a gap between a fillet of the stator coil 2 and a slot wall of the iron core slot 1, and the filler 3 has conformability and insulativity.

It should be noted that, the structure and shape of the core slot 1 and the stator coil 2 in the present invention can be referred to in the prior art, and the manner of embedding the stator coil 2 in the core slot 1 is the same as the conventional manner of embedding the stator coil 2 in the prior art, and will not be described herein again.

The present invention is focused on providing a filler 3 in the gap between the fillet of the stator coil 2 and the wall of the core slot 1 to improve the filling effect of the insulating varnish in the gap between the fillet of the stator coil 2 and the wall of the core slot 1.

It will be appreciated that insulation of the filler 3 must first be ensured.

The filler 3 in the present invention also has conformability, which means, as the name suggests, the ability of the filler 3 to conform to the shape of the gap, that is, when the filler 3 is filled into the gap between the rounded corner of the stator coil 2 and the wall of the core slot 1, the filler 3 can be filled in conformity with the condition of the gap, so that the filler 3 can fill the gap sufficiently, and the problem of insufficient gap filling due to the mismatch or error of the shape of the filler 3 and the gap is avoided.

Therefore, the gap between the fillet of the stator coil 2 and the slot wall of the iron core slot 1 is filled by the filler 3, compared with the prior art that the gap is filled only by insulating paint, the gap can be filled by the filler 3, the defect of insulating paint filling can be overcome, the filling effect of the insulating paint in the gap between the fillet of the stator coil 2 and the slot wall of the iron core slot 1 is improved, the air gap between the dovetail part of the stator core and the fillet of the coil is eliminated, the problem of insulation discharge breakdown of the motor in the long-time operation process can be avoided, and the reliability of the ground insulation of the stator winding of the motor is improved.

In the present invention, the specific structure and material of the filler 3 are not limited as long as the filler 3 has a certain insulating property and conformability. In order to improve the filling effect, as a preferable scheme, on the basis of the above embodiment, the filler 3 includes aramid fiber ropes.

It can be understood that the aramid fiber rope has a certain compressibility and a good conformability, and thus, can more sufficiently fill the gap between the rounded corner of the stator coil 2 and the slot wall of the core slot 1.

In addition, the aramid fiber rope has a good paint coating effect, and after VPI insulation treatment is carried out on the stator according to a conventional manufacturing process flow, the insulating paint can have a good filling effect in a gap between a fillet of the stator coil 2 and the wall of the iron core slot 1.

Furthermore, the aramid fiber rope is simple in operation process and convenient to operate.

In addition, since the fillet after the stator coil 2 is insulated and wrapped is large, in order to reduce the fillet after the stator coil 2 is insulated and wrapped, in addition to the above-described embodiments, the slot insulation for wrapping the stator coil 2 is folded and wrapped around the stator coil 2 so as to be attached to the surface of the stator coil 2 at the slot of the core slot 1.

That is, in the present embodiment, the slot insulation of the stator coil 2 is sealed by being folded and wrapped around the stator coil 2, so as to reduce the fillet of the stator coil 2 after being wrapped with the insulation.

On the basis of the above embodiment, a first filler strip 5 and a second filler strip 6 are provided between the slot wedge 4 for covering the slot opening of the core slot 1 and the stator coil 2, and the first filler strip 5 is in insulation butt joint with the slot opening in the length direction to compensate for the thickness of the slot opening insulation, that is, the thickness of the first filler strip 5 is equal to the thickness of the slot opening insulation. The second filler strip 6 is covered on the first filler strip 5 and the folded and wrapped slot opening, namely, the second filler strip 6 is positioned between the slot wedge 4 and the first filler strip 5.

It is understood that the slot wedge 4 is pressed against the second filler strip 6 to compress the stator coil 2, ensuring stability of the relative positional relationship between the stator coil 2 and the core slot 1.

The shape and structure of the slot wedge 4 are referred to in the prior art and will not be described in detail herein.

Referring to fig. 2, a flow chart of a method for manufacturing a stator slot assembly according to an embodiment of the invention is shown.

In addition to the stator slot assembly, the present invention further provides a manufacturing method of the stator slot assembly disclosed in the above embodiments, the manufacturing method of the stator slot assembly includes steps S1 and S2:

step S1: the stator coil is embedded in the core slot.

Reference may be made to conventional wire-insertion methods in the prior art, which are not described in detail herein.

Step S2: and filling a filler with conformability and insulativity into a gap between the fillet of the stator coil and the slot wall of the core slot.

That is to say, fill filler to the clearance between the fillet of stator coil and the cell wall of core slot, because the filler has the conformality, consequently can be fine adaptation stator coil's fillet and the clearance between the cell wall of core slot to eliminate the air gap that stator core forked tail position and coil fillet exist, improve the filling effect of insulating varnish in the clearance between the fillet of stator coil and the cell wall of core slot, thereby can avoid the motor to produce the problem of insulation discharge breakdown in long-time operation process, improved the reliability of motor stator winding to ground insulation.

Further, in order to reduce the fillet of the stator coil after insulation wrapping, in addition to the above-described embodiments, after filling the filler having conformability and insulation in the gap between the fillet of the stator coil and the slot wall of the core slot, the method further includes:

and the slot insulation used for wrapping the stator coil is folded and wrapped on the stator coil at the slot position of the iron core slot and attached to the surface of the stator coil, and the slot insulation is butted and sealed.

That is to say, this embodiment makes the notch insulating closure through the mode of folding wrapping to reduce the fillet behind the insulating wrapping of stator coil.

In addition to the above embodiments, the method further includes, after insulating the slot for wrapping the stator coil at the slot of the core slot, attaching the surface of the stator coil to the stator coil by folding and wrapping, the method further includes:

and placing a first gasket strip at the notch of the iron core slot to ensure that the first gasket strip is in insulation butt joint with the notch in the length direction.

And placing a second gasket strip on the first gasket strip and the notch insulation after folding and wrapping.

And the slot wedge is arranged in the notch of the iron core slot, so that the slot wedge is pressed against the second gasket.

That is to say, in the present embodiment, the first filler strip is provided to compensate for the thickness of the slot insulation, so as to compensate for the gap between the second filler strip and the stator coil, and ensure that the stator coil and the core slot maintain a stable relative position relationship under the action of the slot wedge.

It is further noted that, in the present specification, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

The stator slot assembly and the method of manufacturing the same provided by the present invention have been described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.