Pulling assembly process method for shielding sleeves of large-diameter rotors

Abstract

The invention relates to a pulling assembly process method for shielding sleeves of large-diameter rotors. A shielding sleeve is welded onto a ring. When a pressure is exerted on the ring, the ring drives the shielding sleeve to be assembled smoothly. Thus, the need for assembly of shielding sleeves of high and large-diameter thin-walled rotors is satisfied. In the pulling assembly process, a pulling assembly ring is welded at the leading-in end of a shielding sleeve, and a pulling assembly stress point is added. Thus, the change of assembly of shielding sleeves from pressing assembly to pulling assembly is realized. By exerting an assembly pressure on the pulling assembly ring during the pulling assembly of a large-diameter rotor, the shielding sleeve bears the tensile force indirectly and is thus assembled on the rotor through interference fit. The stress point of assembly of the shielding sleeve is changed. The problems of shielding sleeve stacking and high scrap rate are solved onthe premise of ensuring that the magnitude of interference is unchanged. Raw materials are saved, and the production cost is reduced. A good solution is provided for the pressing assembly of shieldingsleeves of large-diameter rotors of higher-power pumps and motors.

Description

technical field [0001] The invention relates to a large-diameter rotor shielding sleeve pulling assembly process, which is a process of welding the shielding sleeves together by using tooling, and assembling the shielding sleeves together on the rotor with the press-fitting tooling. Background technique [0002] The shielding sleeve of the shielded motor and electric pump rotor and the rotor core are interference-fitted. During the assembly process, there is no tension point at the lead-in end of the shielding sleeve. The existing process can only use a pressure plate to place on the top of the shielding sleeve to exert pressure on the shielding sleeve. , because the shielding sleeve is thin, the thin sleeve is pressed on the rotor. Under the premise of ensuring the same interference, the larger the diameter of the rotor, the greater the relative friction, and the greater the pressure that the thin-walled shielding sleeve must withstand. The risk of stacking is also higher, ...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the above disadvantages and provide a large-diameter rotor shielding sleeve assembly process, which mainly solves the problem of interference assembly of shielded motors, electric pump rotor shielding sleeves and rotor cores, and the introduction of shielding sleeves during the assembly process. There is no force point for pulling and installing at the end, so the pressure plate can only be placed on the top of the shielding sleeve to exert pressure on the shielding sleeve. Since the shielding sleeve is thin, the thin sleeve is pressed on the rotor. Under the premise of ensuring that the interference remains unchanged, The larger the diameter of the rotor, the greater the relative friction, the greater the pressure on the thin-walled shielding sleeve, the higher the risk of stacking and the higher the scrap rate, etc.