The rotor part is composed of shaft, middle wheel and balancing drum etc.
转子部分由轴、中轮、平衡鼓等组成。
The axial gap of the balancing drum and a cross channel is a cone-shaped structure with a small entrance and large exit and can prevent from being obstructed by sand flowing through the gap;
平衡鼓和交叉流道的轴向间隙为入口小、出口大的锥形 结构,防止被流经间隙的砂子阻塞;
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