Title:
MIX-IN STRUCTURE FOR GAS OR THE LIKE IN PRESSURIZATION CENTRIFUGAL PUMP
Document Type and Number:
WIPO Patent Application WO2004011811
Kind Code:
A9
Abstract:
A mix-in structure for a gas or the like in a pressurization centrifugal pump, capable of mix-discharging liquid and gas or the like to prevent cavitation and of suppressing gas residence in the pump chamber at the time of operation stoppage or the like. It comprises a drum-like case (4) having a suction port (2) and a delivery port (3), in which opposedly disposed are a vane wheel (5) radially formed with a plurality of vanes (19), a pressurization surface (36) formed with a compression chamber (33) opposed to the vane wheel (5) and converging from the suction port (2) toward the vanes (19), and pressurization section (16) formed with a pressurization partition wall (35) disposed close to the side surfaces of the vanes (19) to prevent leakage of the fluid in the vane chamber (27), wherein a gas supply device (6) is installed for supplying a gas into the suction port (2) by an increase in the liquid pressure in the delivery port (3) by using a pressurization centrifugal pump for pressurizing the liquid taken in from the suction port (2) in a pump chamber (9) defined by the vane wheel (5) and the pressurization section (16) and delivering it through the delivery port (3).
Inventors:
YONEHARA RYOICHI (JP)
Application Number:
PCT/JP2003/009366
Publication Date:
March 18, 2004
Filing Date:
July 24, 2003
Export Citation:
Assignee:
YONEHARA GIKEN CO LTD (JP)
YONEHARA RYOICHI (JP)
YONEHARA RYOICHI (JP)
International Classes:
F04D27/00; F04D15/00; F04D29/42; F04D29/44; F04D29/66; F04D31/00; (IPC1-7): F04D29/44; F04D5/00
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