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公开(公告)号：US10704559B2
公开(公告)日：2020-07-07
申请号：US16325899
申请日：2017-11-09
发明人： Hiroshi Funakoshi , Yasushi Ueda , Akio Maeda , Yasuhiro Koyama , Hidetoshi Fukuta , Masahide Ikunami
IPC分类号： F04D13/02 , F04D15/00 , F04D29/041 , F04D1/08 , F04D7/02 , F04D29/42 , F04D1/06 , F04D13/00 , F04D29/08
摘要： A vertical pump includes: a rotary shaft; multi-stage impellers; a casing accommodating the multi-stage impellers; a mechanical seal provided in a penetration part of the casing for the rotary shaft; a balance sleeve, the balance sleeve being positioned between a final stage impeller of the multi-stage impellers and the mechanical seal in the penetration part for the rotary shaft; an intermediate chamber provided between the rotary shaft and the casing and provided on an opposite side of the multi-stage impellers across the balance sleeve in an axial direction of the rotary shaft, the intermediate chamber communicating with an intermediate stage impeller among the multi-stage impellers; a low pressure chamber provided between the rotary shaft and the casing, the low pressure chamber communicating with a low pressure side compared to the intermediate chamber; and a partition wall part dividing the intermediate chamber and the low pressure chamber.
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公开(公告)号：US20190211833A1
公开(公告)日：2019-07-11
申请号：US16325899
申请日：2017-11-09
发明人： Hiroshi Funakoshi , Yasushi Ueda , Akio Maeda , Yasuhiro Koyama , Hidetoshi Fukuta , Masahide Ikunami
IPC分类号： F04D29/041 , F04D1/08 , F04D7/02 , F04D13/02 , F04D15/00
摘要： A vertical pump includes: a rotary shaft; multi-stage impellers; a casing accommodating the multi-stage impellers; a mechanical seal provided in a penetration part of the casing for the rotary shaft; a balance sleeve, the balance sleeve being positioned between a final stage impeller of the multi-stage impellers and the mechanical seal in the penetration part for the rotary shaft; an intermediate chamber provided between the rotary shaft and the casing and provided on an opposite side of the multi-stage impellers across the balance sleeve in an axial direction of the rotary shaft, the intermediate chamber communicating with an intermediate stage impeller among the multi-stage impellers; a low pressure chamber provided between the rotary shaft and the casing, the low pressure chamber communicating with a low pressure side compared to the intermediate chamber; and a partition wall part dividing the intermediate chamber and the low pressure chamber.
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