Abstract:
An improved compressor wheel assembly for a turbocharger or the like includes a centrifugal compressor wheel having a boreless hub to substantially improve wheel fatigue life. The compressor wheel is formed as by casting to include an integral and internally threaded mounting sleeve extending coaxially from the boreless hub. In the assembly, the mounting sleeve extends through an opening in a compressor backplate for threaded connection to a turbocharger shaft, with a thrust collar spacer being interposed between axially facing shoulders defined respectively on the mounting sleeve and shaft to ensure accurate axial positioning of the components. An annular seal flange on the thrust collar spacer extends axially into the backplate opening in generally concentric spaced relation about the mounting sleeve. This seal flange is adapted to carry one or more seal rings for engaging the backplate, thereby sealing the passage of the mounting sleeve and shaft through the backplate opening.
Abstract:
Trockengasdichtung (10) einer Strömungsmaschine, insbesondere eines Turbokompressors, zur Abdichtung eines rotorseitigen Bauteils (11) der Strömungsmaschine gegenüber einem statorseitigen Bauteil (12) der Strömungsmaschine, mit einer Dichtungseinrichtung (13) und einer Trageinrichtung (14) für ein statorseitiges Dichtungselement (16) der Dichtungseinrichtung (13), wobei die Trageinrichtung (14) elastisch verformbar ist.
Abstract:
Es sind elektrische Verdichter für Verbrennungskraftmaschinen mit einem Elektromotor (18), der in einem Motorraum (34) angeordnet ist, einer Antriebswelle (22), die über den Elektromotor (18) antreibbar ist, einem Laufrad (38), welches auf der Antriebswelle (22) befestigt ist und in einem Strömungsraum (36) eines Strömungsgehäuses (12) zwischen einem Einlass (44) und einem Auslass angeordnet ist, einem ersten Lager (24) und einem zweiten Lager (28), über die die Antriebswelle (22) in einem Lagergehäuse (10) gelagert ist, einer Dichtung (48), welche zwischen dem ersten Lager (24) und einer Rückseite des Laufrades (38) angeordnet ist und die Antriebswelle (22) umgibt und einer Mutter (96), mittels derer das Laufrad (38) auf der Antriebswelle (22) in Richtung des ersten Lagers (24) axial verspannt ist, bekannt. Zur Verkürzung der axialen Baulänge und Verringerung der Montage- und Herstellkosten wird erfindungsgemäß vorgeschlagen, dass die Dichtung eine Gleitringdichtung (48) ist und das Laufrad (38) mit der Gleitringdichtung (48) und dem ersten Lager (24) einen Axialspannverbund bildet, der einerseits gegen die Mutter (96) und andererseits gegen einen Anschlag (86) verspannt ist, der an der Antriebswelle (22) an der zum Laufrad (38) entgegengesetzten axialen Seite des ersten Lagers (24) angeordnet ist.
Abstract:
A seal gas pressure booster system (57) for use with a gas compressor (10), particularly of the type used for boosting pressure in gas transmission, process or utility industries and which contains pressure about the shaft/casing interface with the use of dry gas seals (22). Seal supply gas (42) is supplied from the discharge side of the compressor (64). During normal operation, sufficient head across the compressor (10) exists to supply the necessary flow of seal supply gas against the restrictions provided by the filters (32), interconnections and components in the seal gas supply system. During startup, or during modes of operation where insufficient head across the compressor does not exist, the pressure booster system (57) increases the pressure of a stream of comprssor discharge gas to provide the necessary pressure differential to supply the dry gas seal (22) with a continuous flow of clean, filtered gas.
Abstract:
A turbine-type compressor useful in a gas laser apparatus for flowing gas along a flow path of the laser includes a sealing arrangement about a drive shaft of the compressor for preventing undesirable substances from moving to the compressor impeller along the drive shaft of the compressor and contaminating the laser gas compressed thereby. The sealing arrangement includes a first seal, preferably a vacuum pressure seal, for sealing about the shaft at least during rotation of the shaft, and a second seal comprising a resilient bladder which is selectively expanded and contracted to move into and out of sealing contact with the drive shaft, respectively, for, on one hand, sealing against the shaft when the drive shaft is stationary during pumping down of the laser and, on the other hand, withdrawing the bladder from the shaft when the shaft is rotating. The sealing arrangement is reliable and relatively low cost and uses less gas than a prior art sealing arrangement.
Abstract:
The axial forces imposed on a rotor of a fluid machine such as a compressor are controlled by modulating the pressure supplied to a fluid motor. The motor includes a pair of radially spaced seal assemblies extending between the end walls of the motor to define an annular cylinder. The nested seal assemblies provide a compact fluid motor.