Mercury internally-cooled asynchronous motor rotor capable of improving running property and cooling capability

Abstract

The invention relates to a mercury internally-cooled asynchronous motor rotor capable of improving running property and cooling capability, and belongs to the technical field of electric engineering. The mercury internally-cooled asynchronous motor rotor aims at solving the technical problem about improving the starting torque of an asynchronous motor, and effectively cooling the rotor during the starting and stable running of the asynchronous motor. A lower winding is a closed conductive loop which is formed by the flowing of a liquid cooling medium, and the cooling medium is sealed by an insulation isolation structure; the insulation isolation structure comprises a lower right end ring, a lower left end ring and a group of circular pipes; a first peripheral hole is formed in the extending part of the lower left end ring along the circumference direction, and is covered by a fixed annular sleeve ring; a second peripheral hole is formed in an inside groove of the fixed annular sleeve ring; the first peripheral hole is engaged and butted with the second peripheral hole; a pair of cooling medium pipelines is led from the fixed annular sleeve ring. The mercury internally-cooled asynchronous motor rotor has the advantages that the starting torque of the asynchronous motor is increased, and the rotor is effectively cooled during the starting and stable running of the asynchronous motor.

Description

technical field [0001] The invention relates to an asynchronous motor rotor, in particular to a mercury inner-cooled asynchronous motor rotor with improved operating performance and cooling capacity, and belongs to the technical field of electrical engineering. Background technique [0002] Asynchronous motors are widely used in various industries of the national economy and military equipment. The start-up and stable operation of asynchronous motors are important issues concerned by science, technology and engineering circles, and are also core issues that need to be solved and further improved. With the increase of the capacity of the asynchronous motor, the electromagnetic loss on the rotor side increases correspondingly, especially the asynchronous motor used in fields such as electric locomotives, hybrid vehicles, oil field pumping, naval propulsion, etc. has high electromagnetic load and thermal load, and the rotor electromagnetic loss of the asynchronous motor The acc...

AI Technical Summary

Problems solved by technology

If the heat of the rotor is not dissipated in time, on the one hand, it will cause local overheating of the motor rotor, on the other hand, the thermal stress on the rotor side will cause the deformation of the motor structure, and in severe cases, it may induce the occurrence of rotor broken bars.

[0003] In addition, the starting process of asynchronous motors is a key issue in the dynamic operation of asynchronous motors. Usually, variable frequency starting or series resistance starting is used to achieve smooth starting of asynchronous motors. However, variable frequency starting of asynchronous motors will cause harmonic pollution to the power grid. The auxiliary equipment required for resistance starting is relatively cumbersome

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