Title:
PUMP AND PUMP ASSEMBLY METHOD
Document Type and Number:
WIPO Patent Application WO/2024/084798
Kind Code:
A1
Abstract:
The present invention relates to a pump for a liquid and particularly relates to a pump having a mechanical seal disposed on a rotating shaft. A pump (P) includes: a retainer (41) held by a spring (33) that presses a rotating ring (31) of a mechanical seal (20) against a stationary ring (32) thereof; and a retainer holder (50) attached to a back side of an impeller (2). The retainer holder (50) has: a peripheral wall (52) inside which the retainer (41) is fitted; and a bottom wall (53) that extends radially inward from the peripheral wall (52). The peripheral wall (52) protrudes from the bottom wall (53) toward the mechanical seal (20). The peripheral wall (52) has a tapered surface (54) formed at an edge thereof. The tapered surface (54) has a truncated cone shape in which the inner diameter of the peripheral wall (52) increases with increasing the distance from the bottom wall (53).
Inventors:
KAWABATA JUNYA (JP)
MIYA KENTA (JP)
MIYA KENTA (JP)
Application Number:
PCT/JP2023/030303
Publication Date:
April 25, 2024
Filing Date:
August 23, 2023
Export Citation:
Assignee:
EBARA CORP (JP)
International Classes:
F04D29/12; F04D29/08; F04D29/60; F04D29/62; F16J15/34
Foreign References:
| JPS3719767Y1 | ||||
| JPH0223838Y2 | 1990-06-28 |
Attorney, Agent or Firm:
HIROSAWA, Tetsuya et al. (JP)
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