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公开(公告)号：US09726180B2
公开(公告)日：2017-08-08
申请号：US14476877
申请日：2014-09-04
发明人： Naohiro Akiyama , Kaku Okabe
CPC分类号： F04D9/002 , F04D9/02 , F04D29/167 , F04D29/426 , F04D29/448 , F05D2240/126 , F05D2250/52
摘要： A volute of a centrifugal pump includes a proximate section. The proximate section includes: an outer peripheral portion having a tapered shape such that, within a range of a rotational trajectory of each of vanes provided on an impeller, the outer peripheral portion gradually spreads out in a direction axially away from the vane; and an inner peripheral portion having a tapered shape such that, within the range of the rotational trajectory of each of the vanes, the inner peripheral portion tapers in the direction axially away from the vane. The inner and outer peripheral portions are spaced apart from each other with a flat proximal opposed surface portion therebetween. The opposed surface portion is opposed to respective axial end surfaces of vanes of the impeller. The volute also includes a peripheral wall surrounding the peripheral surfaces of the vanes.
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公开(公告)号：US20150071774A1
公开(公告)日：2015-03-12
申请号：US14476877
申请日：2014-09-04
发明人： Naohiro Akiyama , Kaku Okabe
CPC分类号： F04D9/002 , F04D9/02 , F04D29/167 , F04D29/426 , F04D29/448 , F05D2240/126 , F05D2250/52
摘要： A volute of a centrifugal pump includes a proximate section. The proximate section includes: an outer peripheral portion having a tapered shape such that, within a range of a rotational trajectory of each of vanes provided on an impeller, the outer peripheral portion gradually spreads out in a direction axially away from the vane; and an inner peripheral portion having a tapered shape such that, within the range of the rotational trajectory of each of the vanes, the inner peripheral portion tapers in the direction axially away from the vane. The inner and outer peripheral portions are spaced apart from each other with a flat proximal opposed surface portion therebetween. The opposed surface portion is opposed to respective axial end surfaces of vanes of the impeller. The volute also includes a peripheral wall surrounding the peripheral surfaces of the vanes.
摘要翻译： 离心泵的蜗壳包括近似的部分。 近端部包括：外周部，其具有锥形形状，使得在设置在叶轮上的各叶片的旋转轨迹的范围内，外周部沿轴向远离叶片的方向逐渐扩展; 以及具有锥形形状的内周部分，使得在每个叶片的旋转轨迹的范围内，内周部分沿轴向远离叶片的方向渐缩。 内外周部分彼此间隔开一个平坦的近端相对表面部分。 相对的表面部分与叶轮的叶片的相应的轴向端面相对。 蜗壳还包括围绕叶片周边表面的周边壁。
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