Selection of an Asynchronous Motor for the Belt Conveyor Drive with a Parallel-Shaft Gearbox

The article deals with the issue of selecting an asynchronous motor and a parallel-shaft gearbox for an electromechanical drive with a constant duty, in particular, for conveyor equipment. The mass and cost characteristics of standard asynchronous motors with a squirrel cage rotor and commercial parallel-shaft gearboxes of Belarusian and Russian production are analyzed. Recommendations on the selection of motors with different synchronous shaft rotational speeds depending on the transmitted power in the range of 0.37–5.5 kW are given. The minimal mass, dimensional and cost characteristics of the drive serve as the criteria for selecting the motor with the required power, taking into account its maximum durability and rational workload. It is established that when using low-power motors (up to 3 kW) it is advisable to use low-speed motors with a synchronous shaft rotational speed of 700 min^‒1. It is proposed to refine instructional methods of energy-kinematic calculation of electromechanical drives and to select gear ratios of parallel-shaft gearboxes not from the recommended ranges, with subsequent calculation of the engine shaft rotational speed, but on the basis of the gear ratio determined by the specified and accepted rotational speeds of the drive and driven shafts respectively.

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