Siemens Aktiengesellschaft

Ryan S Yamane

Charalambos Polyzopoulos

Mohit Gupta

Leonard J Meyer

James A Chonody

Jeffrey A Kain

An adjustable blade root spring device for turbine blade fixation in turbomachinery. The device is designed to be placed in a space in a rotor disk cavity adjacent to a tip of a blade root fir tree, where the device applies a radial outward force on the turbine blade to fix the blade position in the rotor disk. The device includes an accordion-shaped spring which is compressed by a bolt and a coil spring. When the accordion spring is compressed in length, it increases in height and makes contact with the rotor disk and the turbine blade. The force of the accordion spring on the turbine blade can be adjusted via the bolt, and the coil spring provides an increased compliance range. The device can be inserted into the space without scraping against the blade root or the rotor disk, and expanded once it is in position.

Growing community of inventors

Phoenix, AZ, United States of America

Ryan S Yamane