Abstract: In order to reduce the labor intensity of farmers and reduce losses during feed delivery, a device is designed to use intermittent cyclic rotation of the rotor drum, so that the three chambers distributed at 120° can each perform the functions of feed loading, feed discharge, and chamber drainage, and the feed is mixed into the water and conveyed by hydrodynamic force. Firstly, the important parts of the feeding device were designed for structural optimization, and then by controlling the time interval and rotation time of the intermittent rotation of the rotor drum, the test of feeding mixing rate and feeding loss rate was carried out. The results show that the maximum mixing rate of the feeding device is 962.4kg/h, and the feeding loss rate is lower than 2.3% under the feeding conveying distance of 20m, of which the feed dissolution rate is lower than 1.3% and the feeding breakage rate is lower than 1%. The feed dissolution rate accounts for a larger proportion of the feed loss rate. And compared with the pneumatic conveying device with similar test conditions, the hydraulic conveying device has higher feed mixing rate, i.e., feeding rate, and smaller feeding loss rate.

Key words: net box culture, automatic feeding, feeding devices, feed loss rate

摘要： 为降低养殖户的劳动强度并减少饲料输送过程中的损失，设计一款采用间歇式循环转动转子桶，使其内以120°分布的三个腔体能各自对应分别完成饲料装填、饲料排出、腔室泄水的功能，且将饲料混入水中并采用水力进行输送的装置。首先，对投饲装置的重要部件进行结构优化设计，然后通过控制转子桶间歇式旋转的时间间隔和转动时间，开展投饲混合速率与投饲损失率试验。结果显示，该装置投饲的最大混合速率为962.4 kg/h，在20 m的投饲输送距离下投饲损失率低于2.3%，其中饲料溶解率低于1.3%，投饲破碎率低于1%，饲料溶解率在投饲损失率中占比较大。与试验条件相近的气力输送装置相比，水力输送装置具有较高的投饲混合速率即投喂速率和较小的投饲损失率。

关键词: 网箱养殖, 自动投饲, 投饲装置, 饲料损失率