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US 4,465,436 AGranted
Radial piston compressor
AssigneeSiemens Aktiengesellschaft
InventorSiegfried Schonwald
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AssigneeSiemens Aktiengesellschaft
InventorSiegfried Schonwald
Estimating the term…
Improvements are disclosed in a radial piston compressor having pistons reciprocally disposed in the piston spaces of a cylinder block rotatably supported on a stationary shaft. The radial motion of the pistons is controlled by a rotatable guide which is arranged with its axis of rotation eccentrically to the axis of rotation of the cylinder block. The portion of the stationary shaft covered by the cylinder block includes a suction slot and a pressure slot extending along a portion of the circumference of the stationary shaft. Oil for sealing the cylinder block and the stationary shaft is introduced into the gap between the cylinder block and the stationary shaft. Due to the rotation of the cylinder block, the piston spaces are communicated alternatingly with the suction slot and the pressure slot through an opening provided in the bottom of the piston spaces. In order to obtain good sealing of the gap between the cylinder block and the stationary shaft by the oil contained in this gap, the gap is provided with a cross section which decreases from the suction slot toward the pressure slot, the oil being introduced into the gap in the vicinity of the largest gap cross section.
In a radial piston compressor comprising a cylinder block rotatably supported on a stationary shaft, pistons reciprocally disposed in spaces of the cylinder block, a guide rotatably disposed about the cylinder block with its axis of rotation eccentric to that of the cylinder block, there being a gap between the stationary shaft and the interior of the cylinder block, a suction slot and a pressure slot extending circumferentially over a portion of the stationary shaft covered by the cylinder block, and means for introducing oil into said gap, the improvement comprising a configuration in which the cross-section of the gap decreases in the direction from the suction slot to the pressure slot with the oil being introduced into the gap in the vicinity of the largest gap cross-section such that the pressure of the oil introduced into the gap is equal to or greater than the pressure of the gas being compressed, whereby an improved seal between the stationary shaft and the cylinder block is obtained.
Dependencies are inferred from the claim text.