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Title:
METHOD AND APPARATUS FOR DAMPING FLOW PULSATION OF HYDRAULIC MACHINE
Document Type and Number:
Japanese Patent JP3285950
Kind Code:
B2
Abstract:

PURPOSE: To damp flow pulsation by providing an auxiliary compression volume rapidly discharged to each cylinder and slowly refilled from the high pressure side on an auxiliary compression connecting portion.
CONSTITUTION: A chamber 7 having a predetermined volume is arranged in an auxiliary compression connecting portion 6. The chamber 7 is connected to the high pressure side via a duct 9 having a sectional area less than the connecting portion 6 toward the low pressure side i.e., the respective cylinders to be filled. The connecting portion has a size for rapidly discharging the auxiliary compressed liquid volume to the cylinders. Each cylinder port 4 is positioned in a recess 5, preferably in a radial outer port wall of a valve disc 1. The ports of the connecting portion 6 are exposed. Two or more circumferentially separated recess parts 5', 5" of the cylinder port recess 5 are provided. The last recess part 5' has a elongated shape rearward of the port 4.


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Inventors:
Palmberg, Jan-ove
Pettersson, Maria
Bratt, Stig
Application Number:
JP1992000238359
Publication Date:
May 27, 2002
Filing Date:
September 07, 1992
Export Citation:
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Assignee:
VOAC HYDRAULICS I TROLLHATTAN AB
International Classes:
F04B1/20; F04B11/00; (IPC1-7): F04B11/00; F04B1/20
Attorney, Agent or Firm:
杉村 暁秀 (外5名)