Steam Seal System
AssigneeGeneral Electric Company
InventorsMahendra Singh Mehra, Nestor Hernandez Sanchez
Life of this patent
Estimating the term…
Abstract
The present application provides a variable steam seal system for use with a steam turbine. The variable steam seal system may include a seal steam header, a first pressure section, a first pressure seal positioned about the first pressure section, and a flow path through the first pressure seal and extending to the seal steam header. The first pressure seal may include a moveable seal packing ring for varying the flow path through the first pressure seal to the seal steam header.
Claims19
A variable steam seal system for use with a steam turbine, comprising:
- a seal steam header;
- a first pressure section;
- a first pressure seal positioned about the first pressure section;
- and
- a flow path through the first pressure seal and extending to the seal steam header;
- the first pressure seal comprising a moveable seal packing ring for varying the flow path through the first pressure seal to the seal steam header.
A method of operating a steam turbine at a substantially constant self-sealing load point, comprising:
- monitoring the load on the steam turbine;
- maneuvering a seal packing ring to provide a minimum clearance through a pressure seal during a high load operation;
- and
- maneuvering the seal packing ring to provide a maximum clearance through the pressure seal during a low load operation.
A variable steam seal system for use with a steam turbine, comprising:
- a seal steam header;
- a high pressure section;
- a high pressure seal positioned about the high pressure section;
- a low pressure section;
- a low pressure seal positioned about the low pressure section;
- a first flow path through the high pressure seal and extending to the seal steam header;
- a second flow path through the low pressure seal and extending to the seal steam header;
- and
- the high pressure seal and the low pressure seal comprising a moveable seal packing ring for varying the flow paths through the high pressure seal and the low pressure seal to the seal steam header.
Dependencies are inferred from the claim text.