Patent ID: 8784043
Filing Date: 2014-07-22
Classification: F04D

Abstract:
1. A device for controlling variable-pitch blades in a turbomachine compressor, comprising: a control ring connected to a control shaft and rotatably mounted about an external casing of the compressor and to be connected by connecting rods to variable-pitch blades; and a cylinder, wherein a cylinder body can pivot about a fixed axis and wherein a movable rod is connected to the control shaft by connecting rod means carried by the control shaft guided in rotation by supporting members attached to the casing, wherein the pivoting axis of the cylinder body is carried by at least one tab attached on the casing, and wherein the cylinder body comprises a first cylindrical radial blade foot guided in rotation in an orifice of a first tab rigidly connected to one of the supporting members of the control shaft, and a second cylindrical radial blade foot, diametrically opposing said first blade foot, and guided in rotation in an orifice of a second tab which is attached to one of the casing and the first tab, with no pivotal support of the control shaft by the second tab.