Motor rotor ring welding groove structure

Abstract

The utility model discloses a motor rotor annular welding groove structure, including rotor core, the rotor end ring of being located at the both ends of rotor core and the soldering groove of being located at the outer end of rotor end ring and presenting annular, every soldering groove is equipped with a certain sinking depth, and multiple through -holes are evenly distributed in the soldering groove, every through -hole is inserted with the bar, the soldering groove is filled with the soldering filler, and the soldering filler forms the soldering layer that is slightly higher than the outer end surface of rotor end ring on the soldering groove. The utility model has can protect the bar, promote structural strength, satisfy the advantage of high -speed motor demand.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, and in particular to a motor rotor annular weld groove structure. Background Technology

[0002] Miniaturization, weight reduction, and high efficiency are the trends in the development of high-speed motors. The rotor core accounts for a major proportion of the motor's weight, and its size directly determines the motor's size. A smaller core diameter results in a smaller motor diameter; when the motor diameter is constant, a higher motor power results in a longer motor, and consequently, a longer motor length.

[0003] To shorten the core length while maintaining the same motor power, axial copper strips and copper end rings are typically installed on the core to reduce its size and weight, provided the core diameter is constant.

[0004] Conventional processing methods for embedding copper bars into iron cores mainly include welding and die casting.

[0005] The core of the existing welding method is to set a ring of holes near the outer circumference of the iron core and the end ring, with the end ring stacked on both ends of the iron core, and then inserting a copper strip to weld the copper strip to the copper end ring.

[0006] However, in actual production, it was found that motors produced in this way cannot be used in high-speed motor applications. While motors produced by welding under traditional speeds of several thousand RPM are stable, they exhibit significant instability at speeds of tens of thousands of RPM, which seriously affects their use.

[0007] Research and analysis revealed that the existing welded rotor core consists of three separate components: the rotor, the guide bars, and the end rings. In the actual welding process, the guide bars are made of relatively soft material, and the welding temperature of high-speed motors is usually high. As a result, the guide bars undergo certain deformation and softening after welding, which reduces the structural strength and ultimately fails to meet the strength requirements of high-speed motors. Utility Model Content

[0008] The purpose of this invention is to provide a ring-shaped weld groove structure for a motor rotor. This invention has the advantages of protecting the conductor bars, improving structural strength, and meeting the requirements of high-speed motors.

[0009] The technical solution of this utility model: An annular weld groove structure for an electric motor rotor includes a rotor core, rotor end rings located at both ends of the rotor core, and an annular weld groove located at the outer end of the rotor end rings. Each weld groove has a certain depth of recess, and multiple through holes are evenly distributed within the weld groove. A guide bar is inserted into each through hole. The weld groove is filled with welding filler. The welding filler forms a weld layer on the weld groove that is slightly higher than the outer end face of the rotor end ring.

[0010] In the aforementioned motor rotor annular welded groove structure, the rotor core is provided with mounting holes that match the through holes for inserting guide bars.

[0011] In the aforementioned motor rotor annular weld groove structure, the rotor core is prepared by stacking rotor iron sheets.

[0012] In the aforementioned annular weld groove structure of the motor rotor, the guide bars are made of copper material, and the outer surface of each guide bar is impregnated with insulating varnish.

[0013] In the aforementioned motor rotor annular weld groove structure, there are n guide bars, and the number and specifications of the guide bars correspond to the product requirements.

[0014] In the aforementioned annular weld groove structure of the motor rotor, the guide bar is welded to the rotor end ring.

[0015] Compared with the prior art, this application opens a solder groove of a certain depth on the outer side of the rotor end ring near the outer circumference (where the guide bar is installed), and then fills the solder groove with a solder layer composed of solder filler. The solder layer protects the end of the internal guide bar, effectively preventing the guide bar from deforming or softening, playing a protective and supporting role, thereby improving the overall structural strength, and ensuring that it will not deform during high-speed rotation, thus ensuring quality. Using this application, there is no need to make large-scale changes to the original welding method. Through ingenious structural design, the traditional welded rotor core can also meet the requirements of high-speed motors, which greatly improves the application market and competitiveness of the product, and the processing cost is relatively low.

[0016] Therefore, this utility model has the advantages of protecting the guide bar, improving structural strength, and meeting the requirements of high-speed motors. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a side view of the present invention.

[0018] The markings in the attached diagram are: 1-guide bar, 2-rotor core, 3-rotor end ring, 4-solder groove. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present invention.

[0020] Example. A ring-shaped weld groove structure for an electric motor rotor, as shown below. Figure 1 and 2 As shown, it includes a rotor core 2, rotor end rings 3 located at both ends of the rotor core 2, and a ring-shaped solder groove 4 located at the outer end of the rotor end rings 3; each solder groove 4 has a certain depth of depression, and multiple through holes are evenly distributed in the solder groove 4; a guide bar 1 is inserted into each of the through holes; the solder groove 4 is filled with welding filler; the welding filler forms a solder layer on the solder groove 4 that is slightly higher than the outer end face of the rotor end ring 3.

[0021] The filler material used is silver solder.

[0022] The rotor core 2 has mounting holes inside that correspond to the through holes for inserting the guide bars 1.

[0023] The rotor core 2 is made by stacking rotor iron sheets, specifically by stacking two sections by rotating them 180 degrees according to the marked slots.

[0024] The conductor strip 1 is made of copper material, and the outer surface of each conductor strip 1 is impregnated with insulating varnish.

[0025] The guide bar 1 has 33 bars, and the number and specifications of the guide bar 1 correspond to the actual specifications of the product.

[0026] The guide bar 1 is welded to the rotor end ring 3. The rotor end ring 3 is left with a margin after welding and then machined flat. During fine grinding, the perpendicularity with the inner hole is ensured.

Claims

1. A ring-shaped weld groove structure for an electric motor rotor, characterized in that: It includes a rotor core (2), rotor end rings (3) located at both ends of the rotor core (2), and a ring-shaped solder groove (4) located at the outer end of the rotor end ring (3); each solder groove (4) has a certain depth of sinking, and multiple through holes are evenly distributed in the solder groove (4); a guide bar (1) is inserted in each through hole; the solder groove (4) is filled with welding filler; the welding filler forms a solder layer on the solder groove (4) that is slightly higher than the outer end face of the rotor end ring (3).

2. The annular weld groove structure for a motor rotor according to claim 1, characterized in that: The rotor core (2) has mounting holes inside that match the through holes for inserting guide bars (1).

3. The annular weld groove structure for a motor rotor according to claim 1, characterized in that: The rotor core (2) is made by stacking rotor iron sheets.

4. The annular weld groove structure for a motor rotor according to claim 1, characterized in that: The conductor (1) is made of copper material, and the outer surface of each conductor (1) is impregnated with insulating varnish.

5. The annular weld groove structure for a motor rotor according to claim 1, characterized in that: The guide bar (1) has n bars, and the number and specifications of the guide bar (1) correspond to the product requirements.

6. The annular weld groove structure for a motor rotor according to claim 1, characterized in that: The guide bar (1) is welded to the rotor end ring (3).

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