Title:
HYDRAULIC DEVICE
Document Type and Number:
WIPO Patent Application WO/2017/159135
Kind Code:
A1
Abstract:
A hydraulic device comprises: a pair of helical gears (20, 25); a body (2) for accommodating the gears (20, 25); bearing members (40, 45) for supporting the gears (20, 25); side plates (30, 135) provided between the gears (20, 25) and the bearing members (40, 45); and seal members (50, 55) provided between the side plates (30, 135) and the bearing members (40, 45). The gears (20, 25) are in sliding contact with the inner peripheral surface (3a) of the body (2) in predetermined sliding contact angle ranges. Through-holes are formed in the side plate (135) so as to extend between the front and rear surfaces thereof, the through-holes being located in regions respectively corresponding to the sliding contact angle ranges at positions corresponding to a high-pressure region in a rear surface region (56). A low-pressure region and the high-pressure region in the rear surface region (56) are connected through the through-holes, the low-pressure region being surrounded by the forward-most tooth sections within the sliding contact angle ranges, tooth sections following the forward-most tooth sections, the side plate (135), and the inner peripheral surface (3a).
Inventors:
TAKEDA HIROAKI (JP)
Application Number:
PCT/JP2017/004688
Publication Date:
September 21, 2017
Filing Date:
February 09, 2017
Export Citation:
Assignee:
SUMITOMO PRECISION PROD CO (JP)
International Classes:
F04C2/18; F04C15/00
Domestic Patent References:
| WO2001009514A1 | 2001-02-08 |
Foreign References:
| JP3189138B2 | 2001-07-16 | |||
| JPH02291488A | 1990-12-03 | |||
| JPH08121352A | 1996-05-14 |
Attorney, Agent or Firm:
MURAKAMI, Satoshi (JP)
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