Abstract: Provided is an exhaust scroll capable of reducing mixing loss caused by fluid swirling inside the exhaust scroll and fluid flowing thereinto, while collecting and discharging the fluid which has flowed. The exhaust scroll is provided with a scroll body (11) in which a space having a substantially annular cross section is formed and a connecting portion (12) which connects an exhaust passage (8) with the scroll body (11) to forcibly decelerate fluid (A) discharged from the exhaust passage (8), thereby allowing the fluid (A) to flow into the scroll body (11).

Abstract: In a steam turbine 40 of opposed-current single-casing type in which a high pressure turbine part 31a and an intermediate-pressure turbine part 32a are housed in a single casing, a dummy ring 10 partitions the high-pressure turbine part 31a and the intermediate-pressure part 32a and a cooling steam supply path 101 and a cooling steam discharge path 103 are formed in the dummy ring 10 in the radial direction. Extraction steam or discharge steam s1 of the high-pressure turbine part 31a whose temperature is not less than that of the steam having passed through a first-stage stator blade 8a1, is supplied to the cooling steam supply path 101. The cooling steam s1 is fed throughout the clearance 721 and 723 to improve the cooling effect of the dummy ring 10 and a turbine rotor 7. The cooling steam s1 is then discharged through the cooling steam discharge path 103 to a discharge steam pipe 44 which supplies the steam to a subsequent steam turbine.

Abstract: It is possible to easily and rapidly slot a blade root of a final (last) turbine rotor blade into a blade groove on a turbine disc even when the plan-view shape of a shroud of the turbine rotor blade is complex. A turbine rotor blade that is provided with a blade root that is slotted into a blade groove formed on a circumferential portion of the turbine disc to hold the whole blade, a blade portion that is exposed to high-temperature gas, a platform that supports this blade portion, a shank that connects the blade root and the platform, and a shroud that extends along the circumferential direction from the end of the blade portion has a cut-out portion cut out to a predetermined depth, either at the leading-edge or the trailing-edge of the blade root, along the lengthwise direction thereof from the end of the blade root to an intermediate part of the shank.

Abstract: To provide a turbine that is capable of deforming (tilting) of a support portion (more specifically, a circular-truncated cone portion). A turbine that is provided with a vertically divided casing that is divided into two portions in a longitudinal direction and a support portion that supports a stator-blade ring disposed in the casing, wherein the support portion is provided with a flange portion that is secured between a joining surface of one portion of the casing and a joining surface of the other portion of the casing, being sandwiched therebetween, and a circular-truncated cone portion that connects the flange portion and a stator-blade holding ring, and wherein a thick plate portion having a greater plate thickness than the plate thickness of the flange portion and the stator-blade holding ring is provided between the flange portion located at a lower-half portion and the stator-blade holding ring.

Abstract: To provide a method of controlling a turbine equipment and a turbine equipment capable of carrying out a starting operation of controlling a load applied to a speed reducing portion while complying with a restriction imposed on an apparatus provided at a turbine equipment. The invention is characterized in including a speed accelerating step (S1) of increasing a revolution number by driving to rotate a compressing portion and a turbine portion by a motor by way of a speed reducing portion, a load detecting step (S2) of detecting a load applied to the speed reducing portion by a load detecting portion, and a bypass flow rate controlling step (S3) of increasing a flow rate of a working fluid bypassed from a delivery side to a suction side of the compressing portion when an absolute value of the detected load is equal to or smaller than an absolute value of a predetermined value and reducing the flow rate of the bypassed working fluid when equal to or larger than the absolute value of the predetermined value.

Abstract: To provide a method of controlling a turbine equipment and a turbine equipment capable of carrying out a starting operation of controlling a load applied to a speed reducing portion while complying with a restriction imposed on an apparatus provided at a turbine equipment. The invention is characterized in including a temperature elevating step (S1) of elevating a temperature of a working fluid flowing to the turbine portion, a flow rate increasing step (S2) of increasing a flow rate of a working fluid bypassed from a delivery side to a suction side of the compressing portion when a temperature of the working fluid flowing to the turbine portion is elevated by a heat source portion, and a flow rate reducing step (S3) of reducing the flow rate of the bypassing working fluid after an elapse of a predetermined time period after increasing the flow rate of the bypassing working fluid.

Abstract: The precipitation hardened martensitic stainless steel is characterized by containing, in percent by weight, 12.25 to 14.25% Cr, 7.5 to 8.5% Ni, 1.0 to 2.5% Mo, 0.05% or less C, 0.2% or less Si, 0.4% or less Mn, 0.03% or less P, 0.005% or less S, 0.008% or less N, 0.90 to 2.25% Al, the balance substantially being Fe, and the total content of Cr and Mo being 14.25 to 16.75%. A turbine moving blade and a steam turbine are manufactured by using this martensitic stainless steel.