Heat dissipation housing assembly for electric motor and manufacturing method

Abstract

The invention discloses a method for manufacturing a heat-dissipating casing assembly for an electric motor. The method includes: forming a casing with a cavity for arranging internal components of the electric motor by cutting a long steel pipe; Arrange more than two arc-shaped heat dissipation modules on the periphery to form a radiator that surrounds the outside of the casing and can dissipate heat from the casing. The adjacent heat dissipation modules are connected together by elastic connection, so that the formed heat sink can automatically adapt to the thermal expansion and contraction of the motor casing. In the method of the present invention, the casing of the motor is cut out of steel pipes according to the specification requirements of the motor, and there is no need to manufacture a variety of molds of different specifications. The spliced ​​radiator can adapt to the thermal expansion and contraction of the motor. In addition, the present invention also provides a heat-dissipating casing assembly for an electric motor.

Description

technical field [0001] The invention relates to the technical field of electric motors, in particular to a cooling case assembly for electric motors and a manufacturing method. Background technique [0002] The motor includes an organic casing, a stator and a rotor arranged in the cavity of the casing, end covers arranged at both ends of the casing and a radiator arranged outside the casing. The inside of the casing is a hollow structure, which is generally processed by one-piece casting or extrusion molding. [0003] like Figure 7 Shown is the extruded extrusion casing 8, which has the following disadvantages: the material of the extrusion casing is generally aluminum alloy, and the commonly used grade is 6063-T5, and the yield strength of the material is only 145Mpa, and the strength is low. It cannot meet the strength requirements of the motor with large volume and high torque. Moreover, the aluminum casing is subject to more restrictions in the field of explosion-proo...

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Problems solved by technology

[0003] like Figure 7 Shown is the extruded extrusion casing 8, which has the following disadvantages: the material of the extrusion casing is generally aluminum alloy, and the commonly used grade is 6063-T5, and the yield strength of the material is only 145Mpa, and the strength is low. Unable to meet the strength requirements of large-volume, high-torque motors

Moreover, the aluminum casing is subject to more restrictions in the field of explosion-proof motors, and it is difficult to meet the requirements of explosion-proof motors.

In addition, the extruded casing requires a special extruder for processing, and the large-sized extrusion die requires an extruder with a large tonnage pressure. There are few extruders with a large tonnage pressure in China, and the production cycle is relatively long and expensive.

[0004] like Figure 8 , Figure 9 Shown is the casting casing 9 formed by casting, which has the following disadvantages: the material of the casting casing is generally cast iron, and one mold of the casting casing can only produce casings of one structural size. A variety of molds are required for the shell, resulting in a large number of molds and high costs

Moreover, the casing casting cycle is long and the inventory pressure is high

[0005] It can be seen that when the casing of integral casting or extrusion molding is faced with the demand of multiple models and multiple power stages, it is necessary to manufacture multiple sets of molds with different specifications. For small-batch motor products, such economic benefits are not ideal. The mold cost is also relatively high

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