Dichtungsanordnung, insbesondere zur Abdichtung der Spindelwelle einer Spindel

Die Erfindung betrifft eine Dichtungsanordnung, insbesondere zur Abdichtung einer in einem Gehäuse drehend aufgenommenen Spindelwelle (1) einer Spindel, mit einem stehenden Statorelement (5), welches mit einem rotierenden, insbesondere an der Spindelwelle (1) befestigten Rotorelement (6) mindestens einen Hohlraum (12) zur Aufnahme einer Dichtung (14) bildet, wobei der Hohlraum (12) über mindestens eine Öffnung (10) mit einem Kanal (9) der Dichtungsanordnung zur Abführung von bei der Rotation des Rotorelements (6) in den Hohlraum (12) eingetretener Flüssigkeit ausgebildet ist, wobei und mindestens ein weiteres Dichtungselement (7) vorgesehen ist, welches das Rotorelement (6) gegenüber dem Statorelement (5) bei stillstehendem Rotorelement (6) abdichtet. The invention relates to a sealing arrangement, in particular for sealing a spindle shaft (1) of a spindle accommodated in a housing in a rotating manner, with a stationary stator element (5) which has at least one cavity with a rotating rotor element (6), in particular fastened to the spindle shaft (1) (12) for receiving a seal (14), the cavity (12) via at least one opening (10) with a channel (9) of the seal arrangement for removing the rotation of the rotor element (6) into the cavity (12) is formed, and at least one further sealing element (7) is provided, which seals the rotor element (6) against the stator element (5) when the rotor element (6) is at a standstill.

Method and apparatus for effecting convective heat transfer in a cylindrical industrial heat treat furnace

A low-cost, improved convective heat transfer furnace is disclosed which includes a cylindrical casing to which is attached blanket insulation and the casing is closed at its ends to define a closed end cylindrical furnace enclosure. An annular fan face plate is positioned within the enclosure to define a pressure zone on one side and a work zone on the other side. A paddle wheel fan in the work zone develops a large mass of circumferentially swirling wind which is initially formed as a stationary swirling mass without an axial force component but which under pressure travels axially in the form of a swirling annulus through the non-orificing annular space. The under pressure zone established by the central opening in the fan face plate causes the swirling wind annulus in the work zone to expand radially inwardly and uniformly impinge the complete surface of the work in an effective heat transfer manner before being recirculated back to the pressure zone.

Method and apparatus for effecting convective heat transfer in a cylindrical industrial heat treat furnace

A low-cost, improved convective heat transfer furnace is disclosed which includes a cylindrical casing to which is attached blanket insulation and the casing is closed at its ends to define a closed end cylindrical furnace enclosure. An annular fan face plate is positioned within the enclosure to define a pressure zone on one side and a work zone on the other side. A paddle wheel fan in the work zone develops a large mass of circumferentially swirling wind which is initially formed as a stationary swirling mass without an axial force component but which under pressure travels axially in the form of a swirling annulus through the non-orificing annular space. The under pressure zone established by the central opening in the fan face plate causes the swirling wind annulus in the work zone to expand radially inwardly and uniformly impinge the complete surface of the work in an effective heat transfer manner before being recirculated back to the pressure zone.

Industrial furnace with improved heat transfer

An improved industrial furnace employing a new and unique heat transfer arrangement is disclosed. The furnace is a closed end cylindrical chamber with a circular, concentrically positioned plate dividing one side of the furnace into a fan chamber containing a fan and the other side of the furnace into a heat treat chamber containing the work. The plate has a central under-pressure opening and its outer circular edge is spaced from the cylindrical wall to define an annular space which is non-orificing. Fan rotation in the fan chamber produces an annulus of wind mass swirling at high circumferential speed which axially travels through the non-orificing space towards the closed end of the heat treat chamber at slow speed. Heating elements extend through the non-orificing space into the heat transfer chamber and are constantly impinged by the swirling annulus wind mass to effect good heat transfer therewith. The under-pressure opening causes the heated wind to contact the work before it is drawn into the under-pressure opening for recirculation. An incineration track is provided in the furnace insulation for incinerating the furnace flue products while also heating the wind mass.

Internal heat exchange tubes for industrial furnaces

ABSTRACT OF THE INVENTION An internal heat exchange tube for cooling work within an industrial furnace is positioned to extend within the furnace and is closed at its axial end which is inside the furnace. Within the tube is an open ended, thin wall inner tube formed in the shape of a helical coil. Water intro-duced into the inner tube distributes thermally induced, circumferential stress gradients about both tubes to prevent tube bending while achieving fast cooling of the outer tube.

Industrial furnace with improved heat transfer

An improved industrial furnace employing a new and unique heat transfer arrangement is disclosed. The furnace is a closed end cylindrical chamber with a circular, concentrically positioned plate dividing one side of the furnace into a fan chamber containing a fan and the other side of the furnace into a heat treat chamber containing the work. The plate has a central under-pressure opening and its outer circular edge is spaced from the cylindrical wall to define an annular space which is non-orificing. Fan rotation in the fan chamber produces an annulus of wind mass swirling at high circumferential speed which axially travels through the non-orificing space towards the closed end of the heat treat chamber at slow speed. Heating elements extend through the non-orificing space into the heat transfer chamber and are constantly impinged by the swirling annulus wind mass to effect good heat transfer therewith. The under-pressure opening causes the heated wind to contact the work before it is drawn into the under-pressure opening for recirculation. An incineration track is provided in the furnace insulation for incinerating the furnace flue products while also heating the wind mass.

Vorrichtung und verfahren zur befestigung einer dichtung an einer verkapselten fensteranordnung