Twin-web rotor disc provided with disc cavity flow-guide rib plates

Abstract

The invention discloses a twin-web rotor disc provided with disc cavity flow-guide rib plates. The plurality of flow-guide rib plates are arranged on two spoke plates of the twin-web rotor disc. Disc edge cool air channels are evenly distributed in the radial direction in the edge of the rotor disc along the circumference and cooling air enters cooling blades through the disc edge cool air channels from disc cavity of the twin-web rotor disc. An annular tongue plate is embedded between a front hub and a rear hub of the twin-web rotor disc, and a central channel of the tongue plate is communicated with an inner cavity of the rotor disc. The flow guide rib plates are distributed in a streamline layered mode in the rotating direction of the rotor disc and realizes a centrifugal supercharging effect when the rotor disc is rotating, so that flow speed and the pressure of the cooling air in the disc cavity are increased. The heat exchange area is increased, the convective heat exchange efficiency of the disc cavity is improved by using the flow guide rib plates, and the effect of enhancing heat exchange is achieved. The tongue plate structure is added between the front hub and the rear hub of the rotor disc, and the axial rigidity of an opening in the disc center is improved. By utilizing variable cross-section channels in the tongue plate and the disc edge, the pressure and the flow speed of the cooling air passing through the channels can be controlled.

Description

technical field [0001] The invention belongs to the technical field of gas turbines, and in particular relates to a double-spoke turbine disk used on a gas turbine with a disk cavity guide rib and a tongue plate structure for increasing the axial rigidity of the disk center. Background technique [0002] As the turbine inlet temperature of the gas turbine continues to increase, the operating temperature of the high-pressure turbine disk is also getting higher and higher. At present, the temperature of the disk edge of the high-pressure turbine disk is as high as about 700°, and the temperature of the disk center far away from the high-temperature gas is usually about 400°. Traditional high-pressure turbine disks adopt a single-spoke structure. Since this type of turbine disk cannot achieve cooling inside the disk, it is easy to cause uneven temperature and large thermal stress. Generally speaking, the temperature stress of high-pressure turbine disks accounts for roughly Ab...

AI Technical Summary

Problems solved by technology

The purpose is to adopt the structure of double-spoke turbine disc and tongue plate with disc cavity guide ribs to solve the problems of low heat exchange efficiency and low pressure at the outlet of the disc cavity of the existing double-spoke turbine disc; several guide ribs and Cooperate with the tongue plate structure and the double-spoke turbine disc to increase the axial stiffness at the center of the disc

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