Title:
TANDEM TYPE OIL PUMP
Document Type and Number:
WIPO Patent Application WO/2022/176545
Kind Code:
A1
Abstract:
The present invention provides a tandem type oil pump in which a high-pressure oil pump and a low-pressure oil pump are combined, wherein a pump rotor (38) of the low-pressure oil pump is configured to be movable in the axial direction with respect to a drive shaft (16). This makes it possible for the pump rotor (38) of the low-pressure oil pump to move in the axial direction of the drive shaft (16). Therefore, even when discharge pressure is low, it is possible to supply oil to a side surface of the pump rotor (38) of the low-pressure oil pump, and possible to prevent seizure or abrasion from occurring on the side surface of the pump rotor (38).
Inventors:
YO EISHUN (JP)
MATSUMURA RYO (JP)
MATSUMURA RYO (JP)
Application Number:
PCT/JP2022/002864
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
Domestic Patent References:
| WO2018123682A1 | 2018-07-05 | |||
| WO2017013932A1 | 2017-01-26 |
Foreign References:
| JP2006170147A | 2006-06-29 | |||
| JP2016003766A | 2016-01-12 | |||
| JP2012193702A | 2012-10-11 | |||
| JP2016000989A | 2016-01-07 | |||
| JPH02153281A | 1990-06-12 |
Attorney, Agent or Firm:
KOBAYASHI, Hiromichi et al. (JP)
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