公开(公告)号：US20210123350A1

公开(公告)日：2021-04-29

申请号：US16665964

申请日：2019-10-28

Applicant: HONEYWELL INTERNATIONAL INC.

Inventor： Donald Mittendorf ,  Krista Amato ,  Nicole Conklin ,  Brent Ludwig ,  Mark Morris ,  Ryon Stanley ,  Donald Tilman ,  Heemann Yun

IPC: F01D5/28

Abstract: A turbomachine includes a shroud and a rotor, which includes first and second blades. A first blade tip and a second blade tip respectively include a base and a first layer. The second blade tip also includes an abrasive second layer layered over the respective first layer. The first layer has a lower material hardness than the shroud. The second layer has a lower thermal stability than the shroud and the first layer. The rotor performs a grind operation and, subsequently, a post-grind operation. The second layer, in the grind operation, contacts and removes material from the shroud, and wears away, thereby revealing the first layer of the second blade tip for the post-grind operation. The first layer of the first blade tip is spaced apart with at least some radial clearance from the shroud in the grind and post-grind operations.

公开(公告)号：US11299993B2

公开(公告)日：2022-04-12

申请号：US16665964

申请日：2019-10-28

Applicant: HONEYWELL INTERNATIONAL INC.

Inventor： Donald Mittendorf ,  Krista Amato ,  Nicole Conklin ,  Brent Ludwig ,  Mark Morris ,  Ryon Stanley ,  Donald Tilman ,  Heemann Yun

IPC: F01D5/28

Abstract: A turbomachine includes a shroud and a rotor, which includes first and second blades. A first blade tip and a second blade tip respectively include a base and a first layer. The second blade tip also includes an abrasive second layer layered over the respective first layer. The first layer has a lower material hardness than the shroud. The second layer has a lower thermal stability than the shroud and the first layer. The rotor performs a grind operation and, subsequently, a post-grind operation. The second layer, in the grind operation, contacts and removes material from the shroud, and wears away, thereby revealing the first layer of the second blade tip for the post-grind operation. The first layer of the first blade tip is spaced apart with at least some radial clearance from the shroud in the grind and post-grind operations.