JPH0471752U

JPH0471752U -

Info

Publication number: JPH0471752U
Application number: JP11345390U
Authority: JP
Priority date: 1990-10-31
Filing date: 1990-10-31
Publication date: 1992-06-25
Anticipated expiration: 2005-10-31
Also published as: JP2510217Y2

Description

[Brief explanation of the drawing]

第１図は実施例１の排気ブレーキのシール装置
の正面図、第２図は第１図の−線断面図、第
３図は第１図の−線断面図、第４図は第３図
の要部拡大図、第５図は実施例１に使用するリン
グ状シール部材の斜視図、第６図は実施例１の排
気ブレーキのシール装置にアクチユエータを取付
けた様子を示す斜視図、第７図は実施例２の排気
ブレーキのシール装置の要部断面図、第８図は実
施例２に使用するリング状シール部材の斜視図、
第９図は実施例３の排気ブレーキのシール装置の
要部断面図である。１……排気ブレーキ本体、２……排気管、４…
…バタフライ弁、６……弁軸、１０……シール室
、１２……シール部材、１５……ガス通路、１６
……シール室側シール面、１６′，１８′……シ
ール面、１８……円筒状シール面、２０……リン
グ状シール部材。 Fig. 1 is a front view of the exhaust brake sealing device of Example 1, Fig. 2 is a sectional view taken along the - line in Fig. 1, Fig. 3 is a sectional view taken along the - line in Fig. 1, and Fig. 4 is a sectional view taken along the - line in Fig. 1. FIG. 5 is a perspective view of the ring-shaped seal member used in Example 1, FIG. 6 is a perspective view showing the actuator attached to the exhaust brake sealing device of Example 1, and FIG. The figure is a sectional view of a main part of the exhaust brake sealing device of Example 2, and FIG. 8 is a perspective view of a ring-shaped seal member used in Example 2.
FIG. 9 is a sectional view of a main part of a sealing device for an exhaust brake according to a third embodiment. 1...Exhaust brake body, 2...Exhaust pipe, 4...
... Butterfly valve, 6 ... Valve shaft, 10 ... Seal chamber, 12 ... Seal member, 15 ... Gas passage, 16
... Sealing chamber side sealing surface, 16', 18'... Seal surface, 18... Cylindrical sealing surface, 20... Ring-shaped sealing member.

Claims

[Scope of utility model registration request]

A cylindrical seal surface provided coaxially with the valve shaft and a ring groove-shaped seal chamber that opens toward the cylindrical seal surface are provided in the penetration part where the valve shaft of the butterfly valve passes through the exhaust brake body. A sealing surface is formed to face the sealing surface, and a sealing surface on the sealing chamber side is formed on the outer wall side in the axial direction of the valve shaft, and the sealing surface is in sliding contact with both the cylindrical sealing surface and the sealing surface on the sealing chamber side. A sealing device for an exhaust brake, in which a ring-shaped sealing member that can be expanded and contracted is fitted into a sealing chamber, and a gas passage is provided in the sealing chamber for introducing exhaust gas on the upstream side of a butterfly valve.