Jean-Paul Lagrange

Title: The Innovations of Jean-Paul Lagrange

Introduction

Jean-Paul Lagrange is a notable inventor based in Le Chatelet en Brie, France. He has made significant contributions to the field of gas turbine engine technology, holding three patents that showcase his innovative spirit and technical expertise.

Latest Patents

One of Lagrange's latest patents is a gas turbine engine rotor blading sealing device. This invention relates to a sealing device for the rotor blades of a gas turbine engine, allowing for real-time adjustments to be made regarding the clearances between the rotor blade tips and the sealing structure. The sealing shroud around the turbine wheel is composed of sectors, each attached to both a monolithic short response time ring and a monolithic long response time ring. Ventilating air from upstream of the turbine wheel is directed onto the rings, causing the sectors to radially expand or contract in accordance with the expansion or contraction of the rotor blade tips during various engine operational modes. A small positive clearance between the sealing sectors and the blade tips is maintained throughout the engine's operational range.

Another significant patent is a device for monitoring clearance between rotor blades and a housing. This device is designed to maintain clearance between rotor blades and the surrounding housing by radially expanding or contracting to match the expansion or contraction of the rotor blade tips. The expansion or contraction is achieved through thermal transfer between the device and the gases passing over the rotor blades. The device features several alternating segments with different thermal characteristics, allowing for precise matching of the rotor blade's expansion and contraction characteristics.

Career Highlights

Jean-Paul Lagrange is associated with the Société Nationale d'Étude et de Construction de Moteurs d'Aviation, where he has contributed to various innovative projects in aviation technology. His work has been instrumental in advancing the efficiency and performance of gas turbine engines.

Collaborations

Lagrange has collaborated with notable coworkers such as Gerard E. Jourdain and Gerard M. Mandet, further enhancing the innovative capabilities of his team.

Conclusion

Jean-Paul Lagrange's contributions to gas turbine engine technology through his patents reflect his dedication to innovation and engineering excellence. His work continues to influence the field and inspire future advancements in aviation technology.