Turbine blade
AssigneeROLLS-ROYCE plc
InventorsLi HE, Qiang ZHANG, Anthony John RAWLINSON
Life of this patent
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Abstract
A rotor stage of a turbine has a rotational axis, a shroud and radially inward thereof a turbine blade defined partly by a pressure side wall, a suction side wall and a tip portion. The tip portion has a pressure side tip rib and a tip cavity floor defining a tip cavity. The pressure side tip rib has a width Wps, a height Hps above the tip cavity and defines a tip gap Gps with the shroud. The pressure side tip rib has a sloping side joining the tip cavity floor and having an angle αps to a radial line ZZ. The width Wps is in the range Gps to 5Gps, the height Hps is in the range 5Gps to 15Gps and the angle αps is in the range 20° to 70°.
Claims20
A rotor stage of a turbine comprising
- a rotational axis,
- a shroud and radially inward thereof
- a turbine blade defined partly by a pressure side wall, a suction side wall and a tip portion,
- the tip portion has a pressure side tip rib and a tip cavity floor defining a tip cavity,
- the pressure side tip rib has a width Wps, a height Hps above the tip cavity and defines a tip gap Gps with the shroud,
- the pressure side tip rib has a sloping side joining the tip cavity floor and having an angle αps to a radial line ZZ,
- the width Wps is in the range Gps to 5Gps,
- the height Hps is in the range 5Gps to 15Gps and
- the angle αps is in the range 20° to 70°.
A rotor stage of a turbine comprising
- a rotational axis,
- a shroud and radially inward thereof a turbine blade defined partly by a pressure side wall, a suction side wall and a tip portion,
- the tip portion has a pressure side tip rib and a tip cavity floor defining a tip cavity,
- the pressure side tip rib has a width Wps, a height Hps above the tip cavity and defines a tip gap Gps with the shroud,
- the pressure side tip rib has a sloping side joining the tip cavity floor and having an angle αps to a radial line ZZ, and
- a cooling gallery at least partly provided in the pressure side tip rib and arranged such that major portion of the cooling gallery is situated radially outward of the tip cavity floor.
Dependencies are inferred from the claim text.