Title:
FLOATING TYPE POPPET VALVE DEVICE
Document Type and Number:
Japanese Patent JP3652940
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To prevent the generation of a harmful impact wave in a nozzle situated downstream as a low pressure region is insured in the vicinity of the tip of a poppet valve and to provide a poppet valve device which is to be increased in a thrust factor, having high efficiency.
SOLUTION: By the pressure difference between two chambers fronting on the upper and surface and the under surface of a poppet valve, the tip seat part of the poppet valve is removably mounted on a valve seat to open and close a gas passage. In a so formed poppet valve device, the poppet valve has the tip seat part the end part of which is formed into a reduced conical shape, and its seat surface is formed in a conical surface along the shape of the tip seat part. The passage area of a choke part formed between the conical surface and a gas passage situated downstream is decreased to a value lower than the area of a passage between the tip seat part and the seat surface during a maximum lift of the poppet valve. Furthermore, the tip seat part of the poppet valve is formed such that a tip position, when the poppet valve is lifted is positioned in a level above that of the choke part.
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Inventors:
Toshiharu Fujita
Application Number:
JP30806599A
Publication Date:
May 25, 2005
Filing Date:
October 29, 1999
Export Citation:
Assignee:
MITSUBISHI HEAVY INDUSTRIES,LTD.
International Classes:
B64G1/00; F02K9/86; F16K1/00; F16K1/12; F16K1/34; F16K31/383; F16K47/02; (IPC1-7): F02K9/86; B64G1/00; F16K1/12
Domestic Patent References:
| JP56157471U | ||||
| JP9280399A | ||||
| JP3282170A |
Attorney, Agent or Firm:
Masahisa Takahashi
Hisamaru Hanada
Hisamaru Hanada