Abstract A shaft seal for sealing off an opening where the shaft passes through a wall enclosing a pressurized space comprises a floating sealing ring located within a recess in the wall opening and surrounding the shaft. A fluid sealing medium is introduced into the recess under pressure which causes the sealing ring to be forced axially in the direction of a wall surface within the recess, and a supporting member, for example, in the form of an assembly of axially extending rods surrounds the shaft intermediate the sealing ring and the wall surface to take up the force applied against the sealing ring by the pressurized sealing medium. The axially extending rods are stiff in an axial direction but flexible in a radial direction so as to allow the ends thereof in contact with the sealing ring to shift radially and accommodate themselves to radial shifts of the sealing ring. A cylindrical liner can be installed around the rod assembly to seal it off from pressures which would otherwise be exerted directly against it by the pressurized sealing medium.
Inventors
👤 Hans Baumann
👤 Heinrich Lorenzen
Bibliographic Details
Application Number—
JurisdictionUS
Data Sourcegoogle_patents
Last Synchronized2026-10-27 04:34
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/44; F16J15/441
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
160 words
In a floating-ring-type shaft seal for sealing off floating ring opening where the shaft passes through a wall enclosing a pressurized space filled with gas or liquid, the combination comprising a floating sealing ring located within a recess in the wall opening and which surrounds said shaft, means for introducing a fluid sealing medium into said recess under pressure, the pressure of said sealing medium being exerted against one end face of said sealing ring, and supporting means located within said recess and interposed between the other end face of said sealing ring and said wall for transmitting the fluid pressure exerted by said sealing medium against said floating ring to said wall, said supporting means being constituted by a cylindrical array of circumferentially spaced rodlike axially stiff but radially movable members surrounding said shaft and axially parallel therewith, said rodlike supporting member having one end thereof bearing against said wall and the other end bearing against said sealing ring.
Claim 2
Dependent Claim
160 words
In a floating-ring-type shaft seal for sealing off floating ring opening where the shaft passes through a wall enclosing a pressurized space filled with gas or liquid, the combination comprising a floating sealing ring located within a recess in the wall opening and which surrounds said shaft, means for introducing a fluid sealing medium into said recess under pressure, the pressure of said sealing medium being exerted against one end face of said sealing ring, and supporting means located within said recess and interposed between the other end face of said sealing ring and said wall for transmitting the fluid pressure exerted by said sealing medium against said floating ring to said wall, said supporting means being constituted by a cylindrical array of circumferentially spaced rodlike axially stiff but radially movable members surrounding said shaft and axially parallel therewith, said rodlike supporting member having one end thereof bearing against said wall and the other end bearing against said sealing ring.
Claim 3
Dependent Claim
41 words
A shaft seal of the floating-ring-type as defined in claim 1 and which further includes a liner surrounding said supporting means within said recess, said liner serving to seal off said supporting means from the pressure of said fluid sealing medium.
Claim 4
Dependent Claim
33 words
A shaft seal of the floating-ring-type as defined in claim 1 and which further includes annular end plates located at the opposite ends of said cylindrical array of rodlike members and secured thereto.
Claim 5
Dependent Claim
51 words
A shaft seal of the floating-ring-type as defined in claim 1 and wherein said cylindrical array of rodlike members is established by an axially stiff tubular member surrounding said shaft and axially parallel therewith, said tubular member being provided with circumferentially spaced axially extending slits which thereby develop rodlike fillets therewith.