Sealing structure of rotor winding outgoing line of winding motor

Abstract

The utility model relates to the field of insulation protection, and particularly discloses a sealing structure of a winding motor rotor winding outgoing line, which comprises an elastic sheath tube, the sheath tube comprises a vertical unit and a horizontal unit, and the horizontal unit is integrally formed at the upper part of the vertical unit; the vertical unit comprises an insulating tube coating part, a fastening bolt coating part and a conductive screw coating part, the fastening bolt coating part is integrally formed on the insulating tube coating part, the fastening bolt coating part is step-shaped, the conductive screw coating part is integrally formed on the fastening bolt coating part, and the conductive screw coating part is step-shaped; the horizontal unit is located on the side face of the fastening bolt wrapping part. The utility model aims to solve the technical problem of how to seal and insulate.

Description

Technical Field

[0001] This utility model relates to the field of insulation protection, and specifically discloses a sealing structure for the lead wires of the rotor winding of a wound motor. Background Technology

[0002] The leads of the rotor winding of the wound-rotor motor are connected to the slip rings via conductive screws, forming a closed loop. The conductive screws are fastened to the rotor winding leads by bolts.

[0003] Because the bolt fastening points are exposed conductors, after long-term operation of the wound-rotor motor, carbon powder and copper powder worn off by the carbon brushes adhere to the exposed conductors of the fastening bolts, causing a decrease in the phase-to-phase insulation resistance of the rotor winding leads, resulting in a phase-to-phase short circuit fault, which poses a potential safety hazard. Utility Model Content

[0004] In view of this, the purpose of this utility model is to provide a sealing structure for the lead wires of the rotor winding of a wound motor, so as to solve the technical problem of how to seal and insulate them.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A sealing structure for the rotor winding leads of a wound-rotor motor includes a resilient sheath. The sheath comprises a vertical unit and a horizontal unit, with the horizontal unit integrally formed on top of the vertical unit. The vertical unit includes an insulating tube covering, a fastening bolt covering, and a conductive screw covering. The fastening bolt covering is integrally formed on the insulating tube covering and is stepped, as is the conductive screw covering. The horizontal unit is located on the side of the fastening bolt covering. In this design, the sheath includes both vertical and horizontal units. The vertical unit can cover the conductive screw, fastening bolt, and insulating tube, providing a sealed insulation. The horizontal unit can cover the rotor winding leads, providing a sealed insulation. Furthermore, the conductive screw covering and the fastening bolt covering are stepped, which perfectly matches the shape of the conductive screw and the fastening bolt, allowing the conductive screw covering and the fastening bolt covering to tightly cover the screw and the bolt.

[0007] Optionally, an isolation layer is provided on the lower inner wall of the fastening bolt covering part. The isolation layer is stepped and its upper end extends to the lower part of the conductive screw covering part. A circular groove is provided on the isolation layer, and the circular groove communicates with the horizontal unit. With this solution, insulating oil and filler strips can be filled into the isolation layer after it is set.

[0008] Optionally, a filler strip is wound inside the isolation layer, with one end of the filler strip located in the lower inner part of the isolation layer and the other end of the filler strip extending out of the sealing structure through the circular groove and the horizontal unit.

[0009] Optionally, when the filler strip is wrapped inside the insulating layer, the fastening bolt covering part, the conductive screw covering part, and the horizontal unit are all stretched open. The function of the filler strip is to stretch the entire sealing structure, making it larger. After the sealing structure is fully installed onto the rotor winding lead wire, the filler strip is then pulled out. At this point, the entire sealing structure shrinks back to its original state and can tightly wrap around the winding lead wire.

[0010] Optionally, the insulating layer shown is coated with insulating oil. The insulating oil serves as a lubricant, making it easier and faster to remove the filler strip, and also provides insulation protection.

[0011] The working principle and beneficial effects of this solution are as follows:

[0012] In this solution, the existing coating insulation seal is improved to a sheath tube insulation seal. The sheath tube is made of elastic material and has a filler strip inside. The filler strip can expand the sheath tube. The filler strip is relatively hard, which makes it easy to shape the sheath tube and install it onto the winding lead wire. After installation, the filler strip can be pulled out. At this time, without the expansion of the filler strip, the sheath tube quickly shrinks and sticks tightly to the winding lead wire.

[0013] Other advantages, objectives, and features of this invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination and study, or may be learned from practice of this invention. The objectives and other advantages of this invention can be realized and obtained through the following description. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of an embodiment;

[0015] Figure 2 This is a schematic diagram of the sheath tube.

[0016] The following are the markings in the attached diagram: 1. Conductive screw; 2. Fastening bolt; 3. Insulating tube; 4. Rotor winding lead wire; 5. Sheath tube; 5. Horizontal unit 501; 5. Vertical unit 502; 601. Insulating tube covering part; 602. Fastening bolt covering part; 603. Conductive screw covering part; 7. Filler strip; 701. Circular groove; 702. Detailed Implementation

[0017] The following detailed description illustrates the specific implementation method:

[0018] Example

[0019] like Figure 1 , Figure 2 As shown, the rotor winding lead wire structure generally includes a conductive screw 1, a fastening bolt 2, and an insulating tube 3.

[0020] A sealing structure for the rotor winding lead 4 of a wound-rotor motor includes a resilient sheath 5.

[0021] The sheath tube 5 can be made of rubber material. The sheath tube 5 includes a vertical unit 502 and a horizontal unit 501. The horizontal unit 501 is tubular and is integrally formed on the upper part of the vertical unit 502.

[0022] The vertical unit 502 includes an insulating tube covering 601, a fastening bolt covering 602, and a conductive screw covering 603. The fastening bolt covering 602 is integrally formed on the insulating tube covering 601 and is stepped. The conductive screw covering 603 is integrally formed on the fastening bolt covering 602 and is also stepped. The horizontal unit 501 is located on the side of the fastening bolt covering 602.

[0023] An isolation layer 702 is integrally formed on the lower inner wall of the fastening bolt covering part 602. The isolation layer 702 is stepped and its upper end extends to the lower part of the conductive screw covering part 603. A circular groove 701 is provided on the isolation layer 702, and the circular groove 701 communicates with the horizontal unit 501. A through hole is provided at the bottom of the isolation layer 702.

[0024] A filler strip 7 is wound inside the insulating layer 702. One end of the filler strip 7 is located in the lower inner part of the insulating layer 702, and the other end of the filler strip 7 extends out of the sealing structure through the circular groove 701 and the horizontal unit 501. When the filler strip 7 is wound inside the insulating layer 702, the fastening bolt cover part 602, the conductive screw cover part 603, and the horizontal unit 501 are all stretched open. Insulating oil is applied inside the insulating layer 702. The insulating layer 702 and the sheath tube 5 form a double-layer structure, which can achieve a better sealing and insulation effect.

[0025] In practice:

[0026] First, install the filler strip 7. During installation, you can open the horizontal unit 501 and the insulating tube covering part 601, insert the filler strip 7 through the circular groove 701, and then insert the filler strip 7 into the perforation. Manually pinch the end of the filler strip 7 in the perforation and manually bend it layer by layer and wrap it around the insulating layer 702.

[0027] After installation, insert the rotor winding lead 4 through the bottom of the sheath tube 5 and out through the horizontal unit 501. Then, put the entire sheath tube 5 on the rotor winding lead 4, and finally pull out the filler strip.

[0028] The above description is merely an embodiment of this utility model, and common knowledge such as specific structures and characteristics in the solution is not described in detail here. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of this utility model, and these should also be considered within the protection scope of this utility model. These modifications and improvements will not affect the effectiveness of the implementation of this utility model or its practicality.

Claims

1. A sealing structure for the rotor winding lead wires of a wound-rotor motor, characterized in that: The device includes a resilient sheath tube comprising a vertical unit and a horizontal unit, the horizontal unit being integrally formed on the upper part of the vertical unit; the vertical unit comprising an insulating tube covering, a fastening bolt covering, and a conductive screw covering, the fastening bolt covering being integrally formed on the insulating tube covering and being stepped, the conductive screw covering being integrally formed on the fastening bolt covering and being stepped; the horizontal unit is located on the side of the fastening bolt covering.

2. The sealing structure for the rotor winding lead wire of a wound-rotor motor according to claim 1, characterized in that: An isolation layer is provided on the lower inner wall of the fastening bolt covering part. The isolation layer is stepped and its upper end extends to the lower part of the conductive screw covering part. A circular groove is provided on the isolation layer, and the circular groove is connected to the horizontal unit.

3. The sealing structure for the rotor winding lead wire of a wound-rotor motor according to claim 2, characterized in that: A filler strip is wound inside the isolation layer. One end of the filler strip is located in the lower inner part of the isolation layer, and the other end of the filler strip extends out of the sealing structure through the circular groove and the horizontal unit.

4. The sealing structure for the rotor winding lead wire of a wound-rotor motor according to claim 3, characterized in that: When the filler strip is wrapped inside the isolation layer, the fastening bolt covering, the conductive screw covering, and the horizontal unit are all stretched open.

5. The sealing structure for the rotor winding lead wire of a wound-rotor motor according to claim 4, characterized in that: The insulating layer shown is coated with insulating oil.

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