Title:
SEALING STRUCTURE FOR CENTRIFUGAL PUMP
Document Type and Number:
WIPO Patent Application WO/2022/166205
Kind Code:
A1
Abstract:
A sealing structure for a centrifugal pump. The centrifugal pump comprises: a motor assembly, a pump shaft (11) and a pump body assembly (20). The pump body assembly (20) comprises a pump sleeve (22) and a plurality of impeller stage groups (200). Each impeller stage group (200) comprises a support housing (60), a flow guide housing (250) and an impeller (70). The impeller (70) comprises a hub portion (72), a conical wall (74), vanes (76), and an impeller base (78). The sealing structure comprises a dynamic sealing structure and a water-throwing groove sealing structure. The dynamic sealing structure comprises an external static sealing ring (98). The external static sealing ring (98) comprises a radial contact portion (263) and an axial contact portion (264). A first space (265) is defined between the radial contact portion (263) and a cylindrical base portion (782) of the impeller base (78) of the impeller (70) of the centrifugal pump, and a second space (266) is defined between the axial contact portion (264) and the cylindrical base portion (782). The width of the first space (265) in a radial direction is smaller than the width of the second space (266) in an axial direction. The water-throwing groove sealing structure comprises a plurality of water-throwing grooves (785) arranged in the circumference of the flow guide housing (250).
Inventors:
CAI ZHUO (CN)
ZHU NAN (CN)
ZHU QINGSONG (CN)
ZHU NAN (CN)
ZHU QINGSONG (CN)
Application Number:
PCT/CN2021/117959
Publication Date:
August 11, 2022
Filing Date:
September 13, 2021
Export Citation:
Assignee:
ZHEJIANG KAIBORUI AUTOPARTS CO LTD (CN)
International Classes:
F04D13/10; F04D29/08; F04D29/44; F04D29/70
Foreign References:
| CN113279968A | 2021-08-20 | |||
| CN201407189Y | 2010-02-17 | |||
| JPH0326898A | 1991-02-05 | |||
| CN208503031U | 2019-02-15 | |||
| CN1139183A | 1997-01-01 | |||
| EP1862674A1 | 2007-12-05 | |||
| CN87203854U | 1987-12-26 | |||
| DE29722288U1 | 1998-01-29 |
Attorney, Agent or Firm:
UNITALEN ATTORNEYS AT LAW (CN)
Download PDF:
Previous Patent: CENTRIFUGAL PUMP
Next Patent: HIGH-EFFICIENCY NON-POLLUTING CATALYST FOR PREPARING ACETYL N-PROPANOL, PREPARATION METHOD THEREFOR ...
Next Patent: HIGH-EFFICIENCY NON-POLLUTING CATALYST FOR PREPARING ACETYL N-PROPANOL, PREPARATION METHOD THEREFOR ...