Device for controlling variable-pitch blades in a turbomachine compressor
First Claim
Patent Images
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, andwherein 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.
3 Assignments
0 Petitions
Accused Products
Abstract
A device for controlling variable-pitch blades in a turbomachine compressor, including at least one control ring surrounding an external casing of the compressor, and a control shaft connected to the ring and to the rod of an actuator, the body of which is mounted such that it can pivot about an axle borne by a support mechanism of the control shaft so as to guarantee a precise relative positioning of the axis of pivoting of the actuator with respect to the control shaft.
27 Citations
18 Claims
-
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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. 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, wherein the cylinder body comprises a first cylindrical radial blade foot guided in rotation in an orifice of a tab rigidly connected to one of the supporting members of the control shaft, and a second cylindrical radial blade foot, diametrically opposing the first blade foot, and guided in rotation in an orifice of a second tab attached on the casing, and wherein the second blade foot is engaged in an eccentric guide ring housed in the orifice of the second tab to compensate for any misalignment between the orifices of the two attachment tabs. - View Dependent Claims (12, 13)
-
-
14. 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 two diametrically opposed radial blade feet defining the pivoting axis of the cylinder body and received in orifices or notches of two tabs of a supporting clamp attached on the casing, each blade foot being further connected by a connecting rod to the control shaft. - View Dependent Claims (15, 16, 17)
-
-
18. 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 one cylindrical radial blade foot only, guided in rotation in an orifice of a connecting tab rigidly connected to one of the supporting members of the control shaft which is V-shaped and is attached to the casing by ends of said V-shape.
-
Specification