Title:
COMPRESSION DEVICE OF HIGH-PRESSURE COMPRESSOR
Document Type and Number:
Japanese Patent JP3789691
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To prevent the inner surfaces of a cylinder from being worn by forming a plurality of labyrinth grooves in the peripheral surface of a piston and chamfering the corners of the opening end parts of the labyrinth grooves.
SOLUTION: A plurality of labyrinth grooves 70 are formed in the peripheral surfaces of a piston 53 (54), and the area of the piston from the acting inner surfaces of a cylinder 73 (74), i.e., from liner cylinder 73A (74A) is formed in a lubrication-less labyrinth seal structure, and the tip peripheral edge parts 75 of the piston 53 (54) and the opening end parts of the labyrinth grooves 70 are chamfered. Thus, even if the piston 53 (54) is displaced downward by an amount of clearance between the piston 53 (54) and a liner cylinder 73A (74A) by its own weight so as to contact the inner surface of the liner cylinder 73A (74A), the inner surface of the liner cylinder 73A (74A) is prevented from being worn by the tip peripheral edge part 75 of the piston 53 (54) and the opening end part 76 of the labyrinth grooves (70).
Inventors:
Yasuo Sakamoto
Hiroshi Nishikawa
Makoto Ma
Takehiro Nishikawa
Kazuya Sato
Mizuno Takayuki
Sato Ari morning
Hiroshi Nishikawa
Makoto Ma
Takehiro Nishikawa
Kazuya Sato
Mizuno Takayuki
Sato Ari morning
Application Number:
JP26043999A
Publication Date:
June 28, 2006
Filing Date:
September 14, 1999
Export Citation:
Assignee:
Sanyo Electric Co., Ltd.
International Classes:
F04B39/00; F04B25/00; F04B25/02; F04B27/02; F04B27/053; F04B27/08; F04B37/12; (IPC1-7): F04B39/00; F04B37/12
Attorney, Agent or Firm:
Hiroshi Kakutani
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