CN107546899B

CN107546899B - End fixing structure of rotor lap winding

Info

Publication number: CN107546899B
Application number: CN201610473351.3A
Authority: CN
Inventors: 邓广才; 檀华廷; 王建裕; 钱飞翼; 王浩
Original assignee: SEC Electric Machinery Co Ltd
Current assignee: SEC Electric Machinery Co Ltd
Priority date: 2016-06-24
Filing date: 2016-06-24
Publication date: 2020-07-10
Anticipated expiration: 2036-06-24
Also published as: CN107546899A

Abstract

The invention discloses an end fixing structure of a rotor lap winding, which belongs to the field of motors and comprises a rotor core, a rotor winding, a rotor pressing ring, an internal connecting line of a rotor winding polar-phase group, an inter-pole connecting line of the rotor winding, a first polyester glass rope and a second polyester glass rope, wherein the end of the rotor winding is bent to form an outer layer edge part and an inner layer edge part, the outer layer edge part is positioned at the radial outer side of the inner layer edge part, the inner layer edge part of the rotor winding is bound and connected with the rotor pressing ring through a polyester sleeve, a thermal expansion glass felt is arranged between the outer layer edge part and the inner layer edge part of the end part of the rotor winding, the first polyester glass rope is sequentially connected with all the internal connecting lines of the rotor winding polar-phase, the rotor lap winding end fixing structure can reduce the risk of deformation of the end winding and improve the running reliability of a motor.

Description

End fixing structure of rotor lap winding

Technical Field

The invention belongs to the field of motors, and particularly relates to an end fixing structure of a rotor lap winding.

Background

Some test bench projects in the motor industry need to use an alternating current excitation asynchronous synchronous motor, because of the particularity of the test bench projects, a rotor winding of the motor needs to adopt a multi-turn lap winding, and because the rated rotating speed of the motor is usually more than 2000r/min, the motor has large vibration and large centrifugal force during operation. When the motor runs, the rotor end winding is also under the action of strong centrifugal force and can deform, if the deformation is serious, turn-to-turn short circuit of the rotor winding can be caused, a coil is burnt out, and the reliable running of the motor is influenced, so that the rotor end winding needs to be fixed firmly and reliably, and the reliable and normal running of the motor needs to be ensured by adopting a fixing mode with high safety.

Disclosure of Invention

The invention aims to provide an end fixing structure of a rotor lap winding, which can reduce the risk of deformation of an end winding and improve the running reliability of a motor.

In order to achieve the purpose, the invention adopts the following technical scheme: a rotor lap winding end fixing structure comprises a rotor core, a rotor winding, a rotor pressing ring, a rotor winding polar phase group internal connection line and a rotor winding inter-polar connection line, a first washing glass rope and a second washing glass rope, wherein the end of the rotor winding is bent to form an outer layer edge part and an inner layer edge part, the outer layer edge part is positioned on the radial outer side of the inner layer edge part, the inner layer edge part of the rotor winding is bound and connected with the rotor pressing ring through a polyester sleeve, a thermal expansion glass felt is arranged between the outer layer edge part and the inner layer edge part of the end part of the rotor winding, the first washing glass rope is sequentially connected with all rotor winding polar phase group internal connection lines along the circumference, all rotor winding polar phase group interconnections are connected into a whole through a first polyester glass rope, the axial end part of the rotor winding polar phase group interconnections is connected with the adjacent rotor winding inter-pole connecting lines in a binding mode through a second polyester glass rope, and a total weftless tape sequentially covers the outer sides of all rotor winding end parts along the circumference.

And the outer ring of the inner connecting wire of the rotor winding pole group and the outer ring of the inter-pole connecting wire of the rotor winding are respectively wound and wrapped with a non-weft tape.

The whole rotor comprising a rotor iron core, a rotor winding, a rotor pressing ring, a rotor winding polar group inner connecting wire, a rotor winding inter-electrode connecting wire, a first polyester glass rope, a second polyester glass rope and a total weftless tape forms a rigid whole through VPI dip coating.

And a thermal expansion glass felt is also arranged between the two outer layer edge parts of the two adjacent rotor winding end parts.

The end fixing structure of the rotor lap winding is simple in structure, safe, reliable and obvious in action effect, effectively improves the operation reliability of the motor, and reduces the risk of deformation of the end winding.

Drawings

FIG. 1 is a schematic structural view of the present invention;

in the figure: the rotor comprises a rotor core 1, an outer layer edge part 2, a total weftless tape 3, a thermal expansion glass felt 4, a polyester sleeve 5, a rotor pressing ring 6, a second polyester glass rope 7, a rotor winding interpolar connecting line 8, a rotor winding polar phase group internal connecting line 9, a first polyester glass rope 10 and an inner layer edge part 11.

Detailed Description

The end fixing structure of the rotor lap winding shown in fig. 1 comprises a rotor iron core 1, a rotor winding, a rotor pressing ring 6, a rotor winding polar group internal connection wire 9, a rotor winding inter-polar connection wire 8, a first polyester glass rope 10 and a second polyester glass rope 7.

Rotor winding imbeds in rotor core 1's the mounting groove, rotor winding's tip stretches out outside rotor core 1, and rotor winding stretches out the outer tip bending of rotor core 1 and forms outer limit part 2 and inlayer limit part 11, outer limit part 2 is located the radial outside of inlayer limit part 11, rotor clamping ring 6 is located the inboard of rotor winding tip (with directional rotor center axial to be the inward), rotor winding's inlayer limit part 11 passes through 5 ligature connections of dacron sleeve pipe with rotor clamping ring 6, it is firm to need the ligature, be equipped with the go-between on rotor clamping ring 6, rotor winding's inlayer limit part 11 passes through 5 ligatures of dacron sleeve pipe on the go-between of rotor clamping ring 6.

Thermal expansion glass mats 4 are arranged between the outer layer edge parts 2 and the inner layer edge parts 11 of the rotor winding end parts, and the thermal expansion glass mats 4 are also arranged between the two outer layer edge parts 2 of the two adjacent rotor winding end parts. The space between the outer layer edge part 2 and the inner layer edge part 11 of the rotor winding end part and the space between the two outer layer edge parts 2 of the two adjacent rotor winding end parts are all plugged by thermal expansion glass felts 4.

The first glass of washing rope 10 along the circumference ligature connection all rotor winding polar phase group internal connection 9 in proper order to first glass of washing rope 10 end to end connects, connects into a whole through first glass of washing rope 10 with all rotor winding polar phase group internal connection 9, and first glass of washing rope 10 is phi 12 and washes the glass rope.

The axial end part of the rotor winding polar group interconnector 9 is bound and connected with an inter-pole connecting line of the adjacent rotor winding (the axial end part of the rotor winding polar group interconnector 9) through a second polyester glass rope 7, the binding is required to be firm, a firm whole is formed on the circumference, the axial end part of the rotor winding polar group interconnector 9 and the inter-pole connecting line of the adjacent rotor winding are in a cross shape, and the second polyester glass rope 7 is a phi 5 polyester glass rope.

The rotor winding interpolar connection 8 defines: the rotor windings comprise a plurality of U-pole phase windings, a plurality of V-pole phase windings and a plurality of W-pole phase windings, and connecting lines among all the V-pole phase windings, connecting lines among all the U-pole phase windings and connecting lines among all the W-pole phase windings are rotor winding inter-pole connecting lines 8.

Rotor winding polar phase group interconnect 9 definition: the U-pole phase winding, the V-pole phase winding and the W-pole phase winding all comprise a plurality of winding coils, and connecting lines among all winding coils in one pole phase winding (the U-pole phase winding, the V-pole phase winding or the W-pole phase winding) are rotor winding pole phase group internal connecting lines 9.

And a total weftless tape 3 is sequentially coated outside the end parts of all the rotor windings along the circumference.

The outer ring of the inner connecting wire 9 of the rotor winding pole group and the outer ring of the inter-pole connecting wire 8 of the rotor winding are respectively wound and wrapped with a non-weft tape.

The whole rotor comprising the rotor core 1, the rotor winding, the rotor pressing ring 6, the rotor winding polar group internal connection 9, the rotor winding inter-pole connection 8, the first polyester glass rope 10, the second polyester glass rope 7 and the total weftless tape 3 forms a rigid whole through VPI paint dipping, so that the whole rotor and binding materials form a sealed, moistureproof and insulating rigid whole.

The invention relates to an end fixing structure of a rotor lap winding, which is characterized in that in the process of embedding a rotor winding into a rotor iron core 1, a terylene sleeve 5 is needed to be used for tightly binding an inner layer edge part 11 of the rotor winding with a rotor pressing ring 6 and binding the inner layer edge part and the rotor pressing ring while embedding wires, thermal expansion glass felts 4 are used for compacting between an outer layer edge part 2 and an inner layer edge part 11 of the end part of the rotor winding and between two outer layer edge parts 2 of the end parts of two adjacent rotor windings, phi 12 first polyester glass ropes 10 are used for winding and fixing all rotor winding polar phase group interconnectors 9 on the whole circumference into a whole, then phi 5 second polyester ropes 7 are used at the axial end part of the rotor winding polar phase group interconnectors 9 for tightly binding the rotor winding inter-polar phase connecting wires with the adjacent rotor winding polar phase group interconnectors 9, and finally, phi 5 second polyester ropes 7 are used at the outer circumferential surface of the end part of, And binding and solidifying the non-weft tapes on the outer circular surface of the rotor winding inter-pole connecting wire 8 respectively, compacting all the rotor winding end part, the rotor winding inter-pole connecting wire 8 and the rotor winding pole group internal connecting wire 9 by the non-weft tape hoop on the outer circular surface of the rotor winding end part, and finally, impregnating the rotor whole with VPI and solidifying to form a solid and effective glass fiber reinforced plastic hoop on the winding circumference by all binding materials.

Claims

1. The utility model provides an end fixing structure of rotor lap winding, includes rotor core (1), rotor winding, rotor clamping ring (6), rotor winding utmost point phase group internal connection (9) and rotor winding interelectrode line (8), first glass rope (10) and the second of washing are washed glass rope (7), the tip of rotor winding is crooked and form outer limit part (2) and inlayer limit part (11), outer limit part (2) are located the radial outside of inlayer limit part (11), its characterized in that: the inner layer edge part (11) of the rotor winding is connected with the rotor pressing ring (6) through the binding of the polyester sleeve (5), the thermal expansion glass felt (4) is arranged between the outer layer edge part (2) and the inner layer edge part (11) of the end part of the rotor winding, the first polyester glass rope (10) is sequentially connected with all rotor winding polar phase group interconnections (9) along the circumference, all rotor winding polar phase group interconnections (9) are connected into a whole through the first polyester glass rope (10), the axial end part of the rotor winding polar phase group interconnections (9) is connected with the adjacent rotor winding inter-polar connecting line through the second polyester glass rope (7) in a binding mode, and a total weftless belt (3) is sequentially coated outside all the rotor winding end parts along the circumference.

2. The end fixing structure of a rotor lap as recited in claim 1, wherein: the outer ring of the inner connecting wire (9) of the rotor winding pole group and the outer ring of the connecting wire (8) of the rotor winding pole group are respectively wound and wrapped with a non-weft tape.

3. The end fixing structure of a rotor lap as recited in claim 1, wherein: the whole rotor comprising a rotor iron core (1), a rotor winding, a rotor pressing ring (6), a rotor winding polar-phase group internal connection wire (9), a rotor winding inter-pole connection wire (8), a first polyester glass rope (10), a second polyester glass rope (7) and a total weftless tape (3) forms a rigid whole through VPI dip coating.

4. The end fixing structure of a rotor lap as recited in claim 1, wherein: and a thermal expansion glass felt (4) is also arranged between the two outer layer edge parts (2) of the two adjacent rotor winding end parts.