Rotating components

Compressors and turbines usually consist of several stages. Each of the stages is composed of a ring of vanes and a rotating disk, on which the blades sit. With conventional designs, the blades are inserted individually into the disk.

MTU Aero Solutions develops and manufactures disks for:

• High-pressure compressors
• High-pressure turbines
• Low-pressure turbines

MTU is a global leader in blisk manufacturing. The word “blisk” is a combination of “blade” and “disk”. With blisks, the disk and blades are manufactured integrally, i.e. the blades are not inserted into the disk later. This removes the need for blade roots and disk slots.

Benefits:

• Significant reduction in weight
• Greater resilience
• Reduced maintenance

The use of blisks is suitable above all in components that bear smaller loads. Consequently, MTU Aero Solutions develops and manufactures blisks for:

• High-pressure compressors
• Low-pressure compressors

The air flowing through an engine propels the turbine via the blades. The blades are subjected to particularly strong stresses, above all in the form of a high operating temperature and centrifugal forces. Over time, these stresses cause the blades to “creep”, i.e. they get progressively longer over time. In the worst case, the blade tip can come into contact with the turbine case and block the turbine. In addition, vibration stress can cause “flutter” and lead to material fatigue in blades. Consequently, blades are made from ultra-resilient materials.

MTU Aero Solutions develops and manufactures blades for:

• High-pressure turbines
• Low-pressure turbines