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13 EP 2 578 800 A1 14 heat energy from the various industries can be re-used. (Embodiment 3) [0065] Embodiment 3 describes the example of the ra- dial flow steam turbine in which the steam flow opening 41 is formed in a single side of the casing 40, and the steam is supplied from the steam supply source (it is not shown in figures) to this single side direction. [0066] Fig.6 is a concept figure of the radial flow steam turbine wherein the steam is supplied from single side direction. [0067] In the prior art, most conventional radial flow steam turbines in which the rotor blades are mounted onto the single side of the rotor disk supply the steam from a single direction to the single side surface of the rotor disk. Therefore, the thrust force along to the rotation shaft acts on the rotor disk from a single direction. For example, in order to reduce the axis direction thrust force impressed to the rotor disk, the prior art 5 employs a small hole formed on the rotor disk. However, the steam pass- ing through this small hole is not utilized. It is regarded as the loss of the leaked steam. obtained corresponding to the condition such as the per- formance of the steam supply source. [0072] While some preferable embodiments of the ra- dial flow steam turbine according to the present invention 5 are described above, it should be understood that various changes are possible, without deviating from the techni- cal scope according to the present invention. [0068] On the other hand, the radial flow steam turbine of the present invention comprises the rotor blades 21 25 arrayed both side of the rotor disk 20, the through opening 22 in the vicinity of the rotor disk 20 for securing the steam supply route in the axis direction. Therefore, even if the steam flow opening 41 is formed on the single side, the thrust force along the rotation shaft acting on the rotor 30 disk from a single direction becomes very small, so the steam flowing on both sides of the rotor disk can provide enough force on the rotor blades. [0069] In the configuration shown in Fig.6, the more the operating steam flows to the outer direction, the larger 35 the width of the operating steam flow passage portion 50 becomes. Therefore the operating steam flowing through the operating steam flow passage portion 50 in the out- flow radial direction flows and expands according to the width of the operating steam flow passage portion 50. 40 [0070] Fig.6 (b) shows a modified model of the steam supplying method for supplying the steam to the radial flow steam turbine. The configuration shown in Fig.6 (a) employs one steam flow opening 41 formed in the single side of the casing 40 as the steam supplying method for 45 supplying the steam to the radial flow steam turbine. This Fig.6 (b) also employs one steam flow opening 41 but the supplied steam is divided into the left route and the right route for securing the two steam supply routes along the axis direction. 50 [0071] As shown above, the radial flow steam turbine of the present invention secures the steam supply route along to the axis direction by forming the through opening 22 in the vicinity of the rotation shaft on the rotor disk 20, so the plural sets of the turbine units can be added along 55 to the rotation shaft 10 easily, and the sufficient amount of the steam can be supplied to the steam flow route along to the radial direction. The required output can be 1. A radial flow steam turbine comprising; a rotation shaft; a rotor disk connected to the rotation shaft; a rotor blade mounted on the rotor disk; a stator disk facing to the rotor disk fixed and supported by a casing; a stator blade mounted on the stator disk; wherein, the rotor blade mounted on the rotor disk and the stator blade mounted on the stator disk are arrayed alternately in the radial direc- tion, an operating steam flow passage in which the operating steam flows from around the rotation shaft in an outflow radial direction, wherein, the steam supplied from the steam sup- ply source flows to the operating steam flow pas- sage as an operating steam for rotating the rotor disk and the rotation shaft, an operating steam supply route along to the axial direction is formed and secured by a through opening formed on the rotor disk in the vicinity of the rotation shaft. A radial flow steam turbine according to claim 1, wherein the number of the rotor disk is at least one, a plurality of the rotor blades are mounted on both sides of each rotor disk respectively, the stator disks face both sides of each rotor disk respectively, at least two of the operating steam flow passages are formed, and the steam is led from the steam supply source to each operating steam flow passage via the steam supply route. 10 Industrial applicability [0073] A radial flow steam turbine according to the present invention can be used as a steam turbine used for various industrial facilities because the turbine unit including the rotor disk and the stator disk can be added 15 according to the steam supply condition at the spot. For example, it can be applicable to a steam turbine for ships utilizing the wasted heat from the engine, and it can be applicable to a steam turbine for garbage processing fa- cilities as utilizing the wasted heat from the garbage 20 processing facilities. Claims 8 2.PDF Image | EP 2 578 800 A1 EUROPEAN PATENT
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