CN201207735Y - Induction heating coil for welding of motor rotor terminal ring - Google Patents

Abstract

Disclosed is an induction heating coil used in welding motor rotor end ring, which comprises an inner loop, an outer loop, a connecting tube, and a power connecting tube. One end of the inner loop and one end of the outer loop are respectively connected with the connecting tube. The other end of the inner loop and the other end of the outer loop are connected by the connecting tube which bypasses the power connecting tube of the inner loop .The both sides of the inner and outer loops are provided with arc iron cores. Every two adjacent arc iron cores are connected by a sheet copper. An insulating board is arranged between the inner loop and outer loop. The device of the utility model is simple in structure and convenient in manufacturing, has high security and high evenness of the induction heating temperature, thereby realizing industrialization application, and being particularly applicable to the motor rotor end ring welding.

Description

Induction heating coil for welding of motor rotor end ring

technical field

The utility model relates to an induction heating coil, in particular to an induction heating coil for welding the end ring of a motor rotor.

Background technique

The end ring of the asynchronous traction motor rotor is generally welded by induction heating. The traditional induction heating coil adopts a single ring structure, including two types with iron core and iron core; There is at least a gap of 10-20mm between them, causing the induction heating coil to form an opening at the power input. Therefore, when inductively heating the end ring of the motor rotor, the magnetic field strength at the opening is relatively low, resulting in a low temperature there. In turn, the welding quality is affected, and the uniformity of the welding quality of the end ring cannot be guaranteed. Especially at the position of the opening, the welding will not be firm, and in severe cases, the rotor punching sheet will be damaged.

Utility model content

The purpose of the utility model is to overcome the deficiencies of the prior art and provide an induction heating coil for motor rotor end ring welding with simple and reasonable structure, convenient manufacture, good safety and high uniformity of induction heating temperature.

The utility model is realized by adopting the following scheme: an induction heating coil for welding the end ring of a motor rotor, comprising an inner ring, an outer ring, a connecting pipe, and a power connecting pipe, one end of the inner ring and one end of the outer ring are respectively connected to the The power supply connecting pipe is connected, and the other end of the inner ring and the other end of the outer ring are connected by the connecting pipe bypassing the power connecting pipe of the inner ring.

In the utility model, both sides of the inner ring and the outer ring of the induction heating coil are provided with arc-shaped iron cores, and two adjacent arc-shaped iron cores are connected by copper sheets.

In the utility model, an insulating partition is interposed between the inner ring and the outer ring of the induction heating coil.

The working principle and advantages of the utility model are briefly described as follows: when the alternating current is passed into the induction coil, an alternating electromagnetic field is generated in the induction coil to form a magnetic beam. On the one hand, the metal body placed in the induction coil generates Induction current, at the same time, the magnetic flux penetrates the metal placed in the induction coil, and generates a rotating current in the direction perpendicular to the magnetic flux. Under the joint action of the induction current and the rotating current, the metal placed in the induction coil is heated and placed The solder on the metal welding part is heated and melted to achieve the purpose of induction heating welding; the utility model adopts the structure of the inner and outer rings, and the inner and outer rings are connected through the connecting pipe bypassing the power connecting pipe of the inner ring, so that The magnetic field in the induction coil is evenly distributed, which effectively improves the temperature uniformity of the heated metal body in the induction coil and improves the welding quality of induction heating. In addition, the structure with iron cores on both sides of the induction coil can effectively increase the magnetic field strength, shorten the heating time, and save energy; the iron cores are connected by copper sheets, which can effectively improve the heat dissipation performance of the iron cores and prolong the use of the induction coils and iron cores Long service life: the structure of insulating partitions is sandwiched between the inner and outer rings of the induction heating coil, which can effectively ensure that there will be no short circuit between the inner and outer rings when the induction coil is working, effectively Improve the safety and reliability of the induction coil. To sum up, the utility model has the advantages of simple and reasonable structure, convenient manufacture, good safety, high uniformity of induction heating temperature, can realize industrial application, and is especially suitable for welding end rings of motor rotors.

Description of drawings

Accompanying drawing is the structural representation of the utility model.

In the figure: 1---outer ring, 2---partition plate, 3---copper sheet, 4---iron core, 5---inner ring, 6---connecting pipe, 7, 8--- Power connection tube.

Detailed ways

Below in conjunction with accompanying drawing, the specific embodiment of the present utility model is further described.

Referring to the accompanying drawings, an induction heating coil for welding the end ring of a motor rotor includes an inner ring 5, an outer ring 1, a connecting pipe 6, and power connecting pipes 7 and 8. One end of the inner ring 5 and one end of the outer ring 1 are respectively Connected with the power connection pipes 8 and 7, the other end of the inner ring 5 and the other end of the outer ring 1 are connected through the connection pipe 6 bypassing the power connection pipe 8 of the inner ring 5; the inner ring 5 and the outer ring 1 Arc-shaped iron cores 4 are arranged on both sides, and two adjacent arc-shaped iron cores 4 are connected by copper sheets 3; the inner ring 5 and the outer ring 1 are interposed between the arc-shaped iron cores 4 with insulating partitions 2 .

Claims (3)

1. An induction heating coil for welding the end ring of a motor rotor, comprising an inner ring, an outer ring, a connecting pipe, and a power connecting pipe, characterized in that: one end of the inner ring and one end of the outer ring are respectively connected to the power connecting pipe, The other end of the inner ring and the other end of the outer ring are connected through a connecting pipe bypassing the power connecting pipe of the inner ring. 2. The induction heating coil for welding the end ring of the motor rotor according to claim 1, characterized in that arc-shaped iron cores are arranged on both sides of the inner ring and the outer ring of the induction heating coil, and two adjacent The arc cores are connected by copper sheets. 3. The induction heating coil for welding the end ring of the motor rotor according to claim 1 or 2, characterized in that an insulating partition is interposed between the inner ring and the outer ring of the induction heating coil.

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