Title:
VALVE DEVICE FOR RECIPROCATING COMPRESSOR
Document Type and Number:
Japanese Patent JPS5881275
Kind Code:
A
Abstract:
PURPOSE:To reduce the shock added to a valve seat by means of a valve plate by increasing the area of a valve seat face corresponding to the maximum lift part of the valve plate more than other seat faces in a valve seat provided with valve ports between ring-shaped seat faces with large and small diameters. CONSTITUTION:A valve seat 11 is provided with large-diameter ring-shaped seat faces 12 and small-diameter ring-shaped seat faces 13, and several valve ports 5 are bored between them. Between neighboring valve ports 5, a connecting seat face 12' is formed to connect both seat faces 12 and 13. A valve plate placed on this valve seat is fast fixed at its center part and lifted from the valve seat in its periphery to permit gas circulation. Naturally, a part of the valve seat corresponding to the maximum lift part of the periphery is damaged badly due to the return shock of the valve plate. In this invention, the area of the valve seat face corresponding to the maximum lift part is made larger than the others to reduce the impact stress caused by the valve plate.
Inventors:
IZUSHI MINETOSHI
Application Number:
JP17967281A
Publication Date:
May 16, 1983
Filing Date:
November 11, 1981
Export Citation:
Assignee:
HITACHI LTD
International Classes:
B62D7/15; F04B39/10; F16K15/14; (IPC1-7): F16K15/16
Attorney, Agent or Firm:
Toshiyuki Usuda