Rotary expansible chamber devices – Interengaging rotating members – Like rotary members
Patent
1987-06-05
1989-01-10
Freeh, William L.
Rotary expansible chamber devices
Interengaging rotating members
Like rotary members
F04C 1018
Patent
active
047970782
ABSTRACT:
A bearing arrangement of an external axial rotary piston blower for gaseous medium having a housing which consists of an interior runway surface and two side parts through which shafts project upon which pistons rotating therewith form working chambers. The shafts of these pistons have ball bearings with lip, flap or face seals for sealing-off of gas pressure in the working chambers as well as externally of these bearings having transmission gears journalled with respect to the side parts. Bearing necks or collars are formed and provided with the ball bearings for the shafts of the pistons and these annular grooves are open extending radially outwardly. Groove walls on the transmission side along with inner edges of the gear rings of the gears of the transmission form an annular gap of closest narrow tolerance. A further annular gap can be provided between the bores for the shafts and the bearing necks and the hubs of the gears of the transmission. The annular gaps have a width in a range of a tenth to a twentieth of a millimeter of narrowest close tolerance. An annular chamber is arranged on a side of an end plate of shaft toward the side part. A passage communicates with gap chambers between one end plate of a shaft and an adjoining side part on the one hand. A check valve communicates via a bore in the side part on the other hand.
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Freeh William L.
Wankel GmbH
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