High-speed variable frequency motor rotor keying process method

• Main Authors: LI HAIPENG, YANG XUDONG, KAN XU, PEI JUNFENG, XU LIMIN, YANG JIYAN, ZHAO FEI, ZHANG GUIBIN, JIANG XUDONG
• Format: Patent
• Language: Chinese; English
• Published: 16.08.2022
• Subjects: CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; DYNAMO-ELECTRIC MACHINES; ELECTRICITY; GENERATION

The invention relates to a high-speed variable frequency motor rotor keystroke process method, which comprises the following steps of: performing cold-state lapping on taper keys (2) to ensure that the gaps between a rotor iron core (3) and the taper keys (2), between the taper keys (2) and between the taper keys (2) and a shaft (1) are less than 0.1 mm and the contact surface of the taper keys (2) is more than 80%; removing the rotor iron core (3) and the taper key (2), and marking the rotor iron core (3) and the taper key (2); the shaft (1) is put into a heating furnace for heating and heat preservation, the taper key (2) is thermally punched, and it is guaranteed that the tightening amount of the taper key (2) and the shaft (1) is 0.25-0.3 mm; according to the invention, the swelling amount generated by heating the shaft enables the rotor core, the taper key and the shaft to maintain enough magnitude of interference in the operation process of the motor, thereby eliminating the problem that the rotor core