Permanent-magnet direct-drive system for cooling tower

Abstract

The invention relates to the technical field of cooling towers, and discloses a permanent-magnet direct-drive motor for a cooling tower, which comprises a permanent-magnet synchronous motor and an impeller. A transmission shaft is fixedly mounted at the output end of the permanent-magnet synchronous motor, a threaded groove is formed in the top wall surface of the transmission shaft, and the impeller is arranged at the top of the permanent-magnet synchronous motor. An adjusting groove is formed in the top wall face of the impeller, the inner side wall of the adjusting groove is in an arc shape, a spherical adjusting ball is slidably connected into the adjusting groove, the top end of the side wall of the adjusting groove is in threaded connection with a threaded rod, and the bottom end of the threaded rod penetrates through the interior of the adjusting ball and is in threaded connection with the inner side wall of the threaded groove. In the invention, the permanent magnet synchronous motor is directly connected with the fan impeller through a mechanical mechanism, and the reliability is good; according to the design, the transmission link of the synchronous motor and the impeller is simplified, the transmission efficiency is improved, the maintenance cost is reduced, and compared with a traditional asynchronous motor, the permanent magnet synchronous motor does not need an excitation field, is higher in efficiency and reduces the use cost.

Description

technical field [0001] The invention relates to the technical field of cooling towers, in particular to a permanent magnet direct drive system for cooling towers. Background technique [0002] The cooling tower is a device that uses water as a circulating coolant to absorb heat from a system and discharge it to the atmosphere to reduce the water temperature. Its cooling is to use water and air to exchange heat and cold to generate steam. The steam evaporates and takes away heat to achieve evaporation. The principle of heat dissipation, convective heat transfer and radiation heat transfer is used to dissipate the waste heat generated in industry or in refrigeration and air conditioning to reduce the water temperature. The evaporative cooling device is used to ensure the normal operation of the system. The device is generally barrel-shaped, so it is called a cooling tower. [0003] At present, it is widely used in industrial production. Traditional cooling towers use ordinary ...

AI Technical Summary

Problems solved by technology

On the one hand, the pulley, belt, and reducer all have mechanical losses in the transmission, and the transmission efficiency is lost by more than 10%, which is low in efficiency; on the other hand, the belt or gear transmission will generate a lot of noise and vibration during operation, and the belt occupies an area It is large, easy to wear, needs to be checked and replaced frequently, and the belt is easy to slip and lose rotation when it encounters water or oil; the installation and maintenance of the reducer is large, and the lubricating oil needs to be replaced every year; when the reducer replaces the oil seal or bearing, a large crane is required, and the cost High, inconvenient installation, high maintenance cost

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