Abstract:The noise of AC motor cooling fan may be decreased effectively by employing a water-coo-ling system compared with a usual air-cooling system. In this paper a kind of water-cooling device is designed to simulate the cooling water circulation process in an AC motor. The noise levels of the centrifugal pump with cooling fan and with water-cooling device are measured at various flow rates, respectively. Furthermore, the pump hydraulic and suction performances are tested for the devices with 6 mm and 10 mm diameter discharge nozzles and compared with the corresponding performances of the original pump. It is shown that the noise level of the original pump is reduced at least by 8.70 dB. The device with 6 mm diameter discharge nozzle can take away the heat generated by the AC motor and is subject to a little influence upon the hydraulic and suction performances. Interestingly, that device can raise the pump head at a low flow rate. Even though the device with 10 mm diameter discharge nozzle can improve the head over the 0-15 m3/h flow rate range, particularly the head is increased by 0.30 m at the shut-off condition, unfortunately, both the hydraulic and suction performances are degraded notably by the device, especially at a high flow rate. The increased leakage or volumetric loss in the pump caused from the enlarged nozzle diameter is responsible for the performance degradation.
卢加兴, 袁寿其, 袁建平, 司乔瑞, 骆寅. 射流水冷结构对离心泵性能影响的试验研究[J]. 排灌机械工程学报, 2014, 32(9): 737-741.
Lu Jiaxing, Yuan Shouqi, Yuan Jianping, Si Qiaorui, Luo Yin. Experiments on effects of AC motor water-cooling device on performance of centrifugal pump. Journal of Drainage and Irrigation Machinery Engin, 2014, 32(9): 737-741.
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