Abstract: Various embodiments include a steam turbine drum nozzle, along with a related assembly and steam turbine. Particular embodiments include a nozzle having: an airfoil; a radially inner sidewall coupled with a first end of the airfoil; and a radially outer sidewall coupled with a second end of the airfoil, the second end opposing the first end, wherein the radially outer sidewall includes: a first section radially outward of the airfoil; a thinned section coupled with the first section; and a second section coupled with the thinned section radially outward of the airfoil, the second section having a radially outer face and a circumferentially facing side abutting the radially outer face, wherein the second section includes a circumferentially extending slot, and wherein the second section includes a relief slot extending into a body of the second section from the circumferentially facing side.

Abstract: Various embodiments include a rotor key member, along with a related assembly and steam turbine. Particular embodiments include a rotor key member for retaining a circumferential seal in a steam turbine, the rotor key member including: a main body; a first arm extending from the main body; a second arm extending from the main body, wherein the first, arm, the second arm and the main body define a space spanning axially between the first arm and the second arm; and a hook extending from the second arm in a direction axially away from the space, the hook sized to contact a radially inner surface of the circumferential seal.

Abstract: Various embodiments include a rotor key member having: a body with a primary axis extending in a direction substantially perpendicular to an axial direction in a steam turbine, the body including: a first pair of opposing sides; a second pair of opposing sides extending between the first pair of opposing sides; a top surface and a bottom surface extending between the second pair of opposing sides; and a fillet, bevel or chamfer edge extending between a first one of the first pair of opposing sides and the bottom surface and extending an entire length of the body along the primary axis; and a slot within the body, the slot extending a portion of a length of the body along the primary axis between the second pair of opposing sides and forming an opening in a second one of the first pair of opposing sides.

Abstract: Various embodiments include a steam turbine diaphragm nozzle segment, related assembly and steam turbine. Particular embodiments include a steam turbine diaphragm nozzle segment having: an airfoil having a contact surface for directing a flow of working fluid through a flow path; and a sidewall coupled with the airfoil and at least partially radially outboard of the airfoil, the sidewall having: a body contacting the airfoil; an axially upstream-extending hook extending axially from the body; a first notch adjacent the axially upstream-extending hook; an axially downstream-extending hook extending axially from the body; and a second notch adjacent the axially downstream-extending hook.

Abstract: Various embodiments include a rotor key member, along with a related assembly and steam turbine. Particular embodiments include a rotor key member for circumferentially retaining a circumferential seal in a steam turbine rotor body, the rotor key member having: a main body sized to contact an axial face of the circumferential seal; and a locking member extending from the main body in a direction axially toward the circumferential seal, the locking member having at least one circumferential edge sized to substantially complement a corresponding slot in the circumferential seal to restrict movement of the circumferential seal relative to the steam turbine rotor body.

Abstract: Various embodiments include a rotor key member, along with a related assembly and steam turbine. Particular embodiments include a rotor key member for radially retaining a circumferential seal in a steam turbine rotor body, the rotor key member including: a main body sized to contact an axial face of the circumferential seal; and a hook extending from the main body in a direction axially away from the circumferential seal, the hook sized to substantially complement a corresponding shelf in the steam turbine rotor body to restrict movement of the circumferential seal relative to the steam turbine rotor body.

Abstract: A support block for a steam turbine casing, a related assembly and apparatus. Various embodiments include a steam turbine casing support block having: a body portion sized to substantially fill a pocket in a steam turbine casing, the body portion having a greater length than a depth or a width; a set of tabs extending from the body portion, each of the set of tabs sized to substantially fill a corresponding slot in the steam turbine casing, wherein the set of tabs are located at a radially outwardly facing wall of the body portion; and a pin hole on a bottom surface of the body portion for receiving a retaining member.

Abstract: An austenitic segment for a steam turbine nozzle assembly, along with related assemblies. Various embodiments include a steam turbine austenitic ring segment having: a body portion sized to substantially fill a pocket in a steam turbine outer diaphragm ring, the body portion having a greater circumferential length than an axial depth or a radial width thereof; and a hook-shaped portion extending radially inward from the body portion, the hook-shaped portion sized to engage a hook-shaped slot in the steam turbine outer diaphragm ring, wherein the body portion and the hook-shaped portion form a unitary structure.

Abstract: Various embodiments include steam turbine static nozzles having transitional interfaces. In one embodiment a steam turbine static nozzle blade includes: an airfoil; an inner sidewall integral with a first side of the airfoil; and an outer sidewall integral with a second side of the airfoil; the inner sidewall and the outer sidewall each including: a first side having one of: an arcuate concave surface extending substantially an entire length of the sidewall, or an arcuate convex surface extending substantially the entire length of the sidewall; and a second side opposing the first side and having an angled interface extending substantially the entire length of the sidewall.

Abstract: A steam turbine diaphragm nozzle segment, related assembly and steam turbine. Various embodiments include a steam turbine diaphragm nozzle segment having: a pair of opposing sidewalls; an airfoil extending between the pair of opposing sidewalls and integral with each of the pair of sidewalls, the airfoil having a single contact surface for directing a flow of working fluid through a flow channel; and a fill region integral with the airfoil and the pair of opposing sides, the fill region extending between the pair of opposing sides along an entirety of a length of the airfoil, the fill region for completely obstructing the flow of working fluid.

Abstract: Various embodiments include steam turbine static nozzles having transitional interfaces. In one embodiment a steam turbine static nozzle blade includes: an airfoil; an inner sidewall integral with a first side of the airfoil; and an outer sidewall integral with a second side of the airfoil; the inner sidewall and the outer sidewall each including: a first side having one of: an arcuate concave surface extending substantially an entire length of the sidewall, or an arcuate convex surface extending substantially the entire length of the sidewall; and a second side opposing the first side and having an angled interface extending substantially the entire length of the sidewall.

Abstract: Various embodiments include a steam turbine nozzle and turbomachinery including such a nozzle. In various particular embodiments, a steam turbine nozzle includes: a body having: a first sidewall and a second sidewall opposite the first sidewall; a pressure side and a suction side each extending between the first sidewall and the second sidewall; and a leading edge section at a first junction of the pressure side and the suction side, and a trailing edge section at a second junction of the pressure side and the suction side; and a bypass fluid conduit including: a channel having an opening to at least one of the first sidewall or the second sidewall; and an outlet passageway fluidly connected with the channel between the first sidewall and the second sidewall, the outlet passageway including a first opening on at least one of the pressure side of the body, the suction side of the body or the trailing edge section.

Abstract: Various embodiments include a turbomachine diaphragm ring. In various particular embodiments, a turbomachine diaphragm ring includes: a packing slot sized to house a dovetail section of a turbomachine packing, the packing slot extending circumferentially about a rotational axis of the turbomachine; a key slot connected with the packing slot sized to house a portion of a key member, the key slot extending at least one of radially or axially from the packing slot; and a retaining slot connected with the key slot and extending substantially circumferentially from the key slot, the retaining slot sized to house a retaining member for retaining the key member.

Abstract: An austenitic segment for a steam turbine nozzle assembly, along with related assemblies. Various embodiments include a steam turbine austenitic ring segment having: a body portion sized to substantially fill a pocket in a steam turbine outer diaphragm ring, the body portion having a greater circumferential length than an axial depth or a radial width thereof; and a hook-shaped portion extending radially inward from the body portion, the hook-shaped portion sized to engage a hook-shaped slot in the steam turbine outer diaphragm ring, wherein the body portion and the hook-shaped portion form a unitary structure.

Abstract: A support block for a steam turbine casing, a related assembly and apparatus. Various embodiments include a steam turbine casing support block having: a body portion sized to substantially fill a pocket in a steam turbine casing, the body portion having a greater length than a depth or a width; a set of tabs extending from the body portion, each of the set of tabs sized to substantially fill a corresponding slot in the steam turbine casing, wherein the set of tabs are located at a radially outwardly facing wall of the body portion; and a pin hole on a bottom surface of the body portion for receiving a retaining member.

Abstract: Various embodiments include a turbomachine flow divider. In various particular embodiments, a flow divider for connecting with a first inner diaphragm ring and a second inner diaphragm ring of a turbomachine includes: a body section; and a pair of axially extending flanges extending from the body section, each of the axially extending flanges for engaging with the first inner diaphragm ring and the second inner diaphragm ring, respectively, wherein the flow divider is formed substantially of a rolled plate metal or a sheet metal.

Abstract: Various embodiments include steam turbine static nozzles having transitional interfaces. In one embodiment a steam turbine static nozzle blade includes: an airfoil; an inner sidewall integral with a first side of the airfoil; and an outer sidewall integral with a second side of the airfoil; the inner sidewall and the outer sidewall each including: a first side having one of: an arcuate concave surface extending substantially an entire length of the sidewall, or an arcuate convex surface extending substantially the entire length of the sidewall; and a second side opposing the first side and having an angled interface extending substantially the entire length of the sidewall.

Abstract: Various embodiments include an alignment pin for a turbomachine. In some embodiments, the alignment pin includes a hollowed head section for engaging a diaphragm slot in the turbomachine. In these embodiments, the alignment pin further includes an expandable sleeve section connected with the hollowed head, the expandable sleeve section for engaging a casing slot in the turbomachine.

Abstract: A slotted turbine static nozzle airfoil. In one embodiment, the turbine static nozzle airfoil includes a concave pressure wall having a slot extending therethrough; a convex suction wall adjoined with the concave pressure wall at respective end joints; and a pocket fluidly connected with the slot and located between the convex suction wall and the concave pressure wall, wherein at least one of the convex suction wall or the concave pressure wall includes a thinned segment proximate one of the respective end joints, the thinned segment configured to extend the pocket toward a trailing edge of the turbine static nozzle airfoil.

Abstract: A support bar for a steam turbine nozzle assembly is disclosed. In one embodiment, the support bar includes a hook-shaped portion for engaging a lip portion of a steam turbine diaphragm, wherein the steam turbine support bar is configured to non-affixedly join a steam turbine casing to the steam turbine diaphragm.