JPS61145267U

JPS61145267U -

Info

Publication number: JPS61145267U
Application number: JP2942885U
Authority: JP
Priority date: 1985-02-28
Filing date: 1985-02-28
Publication date: 1986-09-08
Also published as: JPH0413575Y2

Description

[Brief explanation of the drawing]

図面は本考案の一実施例を示し、第１図は本考
案に係る弁駆動装置の構成を示す極低温膨張機の
要部断面図であり、第２図ａ，ｂはその駆動ロツ
ドに作用する力のバランスを示す説明図である。
第３図は本考案に係る膨張機の使用例を示す冷凍
サイクルの概略図である。１……膨張機本体、４……膨張室、５……断熱
真空室、５ａ，５ｂ……断熱真空室内壁、６……
吸気ポート、７……排気ポート、８……吸気弁、
９……排気弁、１０，１１……駆動ロツド、１０
ａ，１０ｂ，１１ａ，１１ｂ……受圧板、１２ａ
，１２ｂ，１３ａ，１３ｂ……ベローズ（シール
筒）、１４ａ，１４ｂ，１５ａ，１５ｂ……圧力
室、１６ａ，１７ａ……貫通口（大気圧導入口）
、１６ｂ，１７ｂ……貫通口（ポート圧導入口）
。 The drawings show an embodiment of the present invention; FIG. 1 is a cross-sectional view of the essential parts of a cryogenic expander showing the configuration of the valve drive device according to the present invention, and FIGS. FIG.
FIG. 3 is a schematic diagram of a refrigeration cycle showing an example of use of the expander according to the present invention. 1... Expansion machine main body, 4... Expansion chamber, 5... Insulated vacuum chamber, 5a, 5b... Insulated vacuum chamber wall, 6...
Intake port, 7...exhaust port, 8...intake valve,
9... Exhaust valve, 10, 11... Drive rod, 10
a, 10b, 11a, 11b...pressure receiving plate, 12a
, 12b, 13a, 13b... Bellows (seal tube), 14a, 14b, 15a, 15b... Pressure chamber, 16a, 17a... Penetration port (atmospheric pressure introduction port)
, 16b, 17b...through port (port pressure introduction port)
.

Claims

[Scope of utility model registration request]

Intake valves and exhaust valves provided at the intake port and exhaust port of the expansion chamber on the low temperature side of the reciprocating expander main body are installed through an insulating vacuum chamber surrounding the expander main body from the normal temperature side to the low temperature side. The valve drive device is configured to open and close by the reciprocating movement of a drive rod, in which a pressure receiving plate integral with the drive rod is erected on each of the low temperature side and room temperature side of the insulated vacuum chamber, and the pressure receiving plate is integrated with the drive rod. An expandable seal tube is installed between the plate and the wall of the insulated vacuum chamber facing the plate, and a pressure chamber is provided around the rod inside the seal tube, which is airtightly partitioned from the insulated vacuum chamber. While introducing atmospheric air into the pressure chamber on the low temperature side, working gas is introduced into the pressure chamber on the low temperature side to balance the force acting on the pressure receiving plate from the pressure chamber on the room temperature side and the force acting on the pressure receiving plate from the pressure chamber on the low temperature side. A valve drive device for an expander characterized by: