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Title:
VERTICAL PUMP AND UREA SYNTHESIZING PLANT
Document Type and Number:
WIPO Patent Application WO/2018/131275
Kind Code:
A1
Abstract:
A vertical pump comprising: a rotating shaft; multi-stage impellers configured so as to rotate in conjunction with the rotating shaft; a casing housing the multi-stage impellers; a mechanical seal provided in a section of the casing penetrated by the rotating shaft; a balance sleeve positioned between the mechanical seal and the final-stage impeller among the multi-stage impellers, in the rotating shaft penetration section, said balance sleeve being for at least partially balancing the thrust force of the rotating shaft; an intermediate chamber provided on the opposite side to the multi-stage impellers and having the balance sleeve therebetween in the axial direction of the rotating shaft, between the rotating shaft and the casing, and communicating with a mid-stage impeller among the multi-stage impellers; a low-pressure chamber provided adjacent to the mechanical seal in the axial direction, between the rotating shaft and the casing, and communicating with the low pressure side of the mid-stage impeller; and a partitioning section that partitions between the intermediate chamber and the low-pressure chamber.

Inventors:
FUNAKOSHI, Hiroshi (C/O MITSUBISHI HEAVY INDUSTRIES LTD, 16-5, Konan 2-Chome, Minato-k, Tokyo 15, 〒1088215, JP)
UEDA, Yasushi (C/O MITSUBISHI HEAVY INDUSTRIES LTD, 16-5, Konan 2-Chome, Minato-k, Tokyo 15, 〒1088215, JP)
MAEDA, Akio (C/O MITSUBISHI HEAVY INDUSTRIES LTD, 16-5, Konan 2-Chome, Minato-k, Tokyo 15, 〒1088215, JP)
KOYAMA, Yasuhiro (C/O MITSUBISHI HEAVY INDUSTRIES LTD, 16-5, Konan 2-Chome, Minato-k, Tokyo 15, 〒1088215, JP)
FUKUTA, Hidetoshi (C/O MHPS Engineering Co. Ltd, 12, Nishiki-cho, Naka-ku, Yokohama-sh, Kanagawa 15, 〒2318715, JP)
IKUNAMI, Masahide (C/O MHPS Engineering Co. Ltd, 12, Nishiki-cho, Naka-ku, Yokohama-sh, Kanagawa 15, 〒2318715, JP)
Application Number:
JP2017/040481
Publication Date:
July 19, 2018
Filing Date:
November 09, 2017
Export Citation:
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Assignee:
MITSUBISHI HEAVY INDUSTRIES, LTD. (16-5, Konan 2-Chome Minato-k, Tokyo 15, 〒1088215, JP)
International Classes:
F04D15/00; F04D1/08; F04D7/02; F04D13/00
Domestic Patent References:
WO2016152892A12016-09-29
Foreign References:
JP2011122506A2011-06-23
JPH08277798A1996-10-22
JPH0195593U1989-06-23
JPH11324989A1999-11-26
JPS6440713A1989-02-13
JPS377269B1
JPH0754798A1995-02-28
JPH1030731A1998-02-03
JPS57128669A1982-08-10
JP2006183465A2006-07-13
Other References:
See also references of EP 3486493A4
Attorney, Agent or Firm:
SEISHIN IP PATENT FIRM, P.C. (Mita 43MT Building 13th Floor, 13-16 Mita 3-Chome, Minato-k, Tokyo 73, 〒1080073, JP)
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