Title:
TANDEM-TYPE OIL PUMP
Document Type and Number:
WIPO Patent Application WO/2022/176544
Kind Code:
A1
Abstract:
According to the present invention, a pump-rotor bearing part (42) that is provided between a pump-rotor housing part (22) and a drive-shaft bearing part (24), that is larger in diameter than the drive-shaft bearing part (24), that is smaller in diameter than the pump-rotor housing part (22), and that is continuous with the pump-rotor housing part (22) is formed in a pump body (11). Furthermore, a pump-rotor small-diameter shaft part (41) is formed in a pump rotor (38), the pump-rotor small-diameter shaft part (41) is borne by the pump-rotor bearing part (42), and a lubrication passage (46) for supplying oil from a high-pressure oil pump to the pump-rotor bearing part (42) is formed in the pump body (11). Accordingly, high-pressure oil can be supplied from the high-pressure oil pump to the pump-rotor bearing part (42) via the lubrication passage (46), thus making it possible to suppress the occurrence of a burn-in phenomenon and an abrasion phenomenon between the pump-rotor small-diameter shaft part (41) and the pump-rotor bearing part (42).
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Inventors:
MATSUMURA RYO (JP)
YO EISHUN (JP)
YO EISHUN (JP)
Application Number:
PCT/JP2022/002863
Publication Date:
August 25, 2022
Filing Date:
January 26, 2022
Export Citation:
Assignee:
HITACHI ASTEMO LTD (JP)
International Classes:
F04C15/00; F04C2/10; F04C11/00
Foreign References:
| JP2016000989A | 2016-01-07 | |||
| JPH02153281A | 1990-06-12 | |||
| JPH04321783A | 1992-11-11 | |||
| JP2005113894A | 2005-04-28 | |||
| JP2006170147A | 2006-06-29 |
Attorney, Agent or Firm:
KOBAYASHI, Hiromichi et al. (JP)
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