Blade attachment assembly

摘要

An assembly and method for affixing a turbomachine rotor blade to a rotor wheel are disclosed. In an embodiment, an adaptor member is provided disposed between the blade and the rotor wheel, the adaptor member including an adaptor attachment slot that is complementary to the blade attachment member, and an adaptor attachment member that is complementary to the rotor wheel attachment slot. A coverplate is provided, having a coverplate attachment member that is complementary to the rotor wheel attachment slot, and a hook for engaging the adaptor member. When assembled, the coverplate member matingly engages with the adaptor member, and retains the blade in the adaptor member, and the assembly in the rotor wheel.

主权项

1. An assembly for affixing a blade having a blade attachment member to a rotor wheel having a rotor wheel attachment slot, the assembly comprising:
an adaptor member disposed between the blade and the rotor wheel, the adaptor member including:
an adaptor attachment slot that is complementary to the blade attachment member,an adaptor attachment member that is complementary to the rotor wheel attachment slot, anda first chamfer on a first face of the adaptor member between the adaptor attachment member and the adaptor attachment slot; and a coverplate member, the coverplate member including:
a coverplate attachment member that is complementary to the rotor wheel attachment slot,a hook-shaped feature disposed on a radially inward end of the coverplate attachment member for engaging the adaptor member, wherein the hook-shaped feature axially retains the adaptor member relative to the coverplate member; anda second chamfer on a mating face of the coverplate member, disposed between the hook-shaped feature and a panel extending radially outward from the coverplate attachment member relative to the hook-shaped feature for maintaining the blade attachment member axially within the adaptor attachment slot, wherein the blade attachment member is axially inserted into the adaptor attachment slot, wherein the second chamfer on the mating face of the coverplate member matingly engages the first chamfer on the first face of the adaptor member, wherein the assembled adaptor attachment member and coverplate attachment member are axially inserted into the rotor wheel attachment slot, wherein, when assembled, the panel maintains the blade attachment member axially within the adaptor slot.