Nozzle box assembly
AssigneeDoosan Heavy Industries Construction Co., Ltd
InventorDongwoo Kang
Life of this patent
Estimating the term…
Abstract
A nozzle box assembly includes steam inlets, through which working steam is supplied, a torus part connected to the steam inlets so as to form an annular steam path and having an opening portion, in which a part of the front surface of the annular steam path is opened, a bridge ring connected to the front surface of the torus part and having a bridge inside, and a steam path ring connected to the bridge ring so as to provide a path, which is connected to a stage, and provided with a plurality of vanes, wherein the bridge ring and the steam path ring are formed of the coupling of a plurality of divisions, which are divided in the circumferential direction thereof, and the divisions are coupled to the front surface of the torus part.
Claims16
A nozzle box assembly comprising:
- a torus part that is coupled to at least one steam inlet to provide an annular steam path to a stage of a steam turbine and that includes an open portion communicating with a downstream side of the annular steam path, the torus part having a planar surface communicating with the open portion;
- and
- a plurality of ring divisions respectively coupled to the planar surface of the torus part, each of the ring divisions comprising
- a bridge ring having a coupling surface for coupling with the planar surface of the torus part and including one or more bridges disposed toward the torus part, the bridge ring further including an inner portion and an outer portion respectively connected to opposite ends of the one or more bridges, the inner and outer portions of the bridge ring having respective coupling surfaces that face corresponding inner and outer portions of the planar surface of the torus part;
- a steam path ring forming a steam path that communicates with the annular steam path via the bridge ring and including one or more vanes disposed downstream from the one or more bridges;
- and
- protrusion coupling parts formed on the respective coupling surfaces of the bridge ring and formed in the planar surface of the torus part, respectively, the protrusion coupling parts including inner protrusion coupling parts and outer protrusion coupling parts,
- wherein the inner protrusion coupling parts include an inner protrusion formed on the coupling surface of the inner portion of the bridge ring and an inner recess that corresponds to the inner protrusion and is formed in the inner portion of the planar surface of the torus part to receive the inner protrusion, respectively, and
- wherein the outer protrusion coupling parts include an outer protrusion formed on the coupling surface of the outer portion of the bridge ring and an outer recess that corresponds to the outer protrusion and is formed in the outer portion of the planar surface of the torus part to receive the outer protrusion, respectively.
A nozzle box assembly comprising:
- a torus part that is coupled to at least one steam inlet to provide an annular steam path to a stage of a steam turbine and that includes an open portion communicating with a downstream side of the annular steam path, the torus part having a planar surface communicating with the open portion;
- and
- a plurality of ring divisions respectively coupled to the planar surface of the torus part, each of the ring divisions comprising a first end coupled to the planar surface of the torus part and a second end extending from the first end, the first and second ends forming a steam path communicating with the annular steam path,
- wherein the plurality of ring divisions are arranged along a circumferential direction of the nozzle box assembly and include neighboring ring divisions that are coupled together in the circumferential direction of the nozzle box assembly, and the ring divisions completely cover the open portion of the torus part,
- wherein the neighboring ring divisions of the plurality of ring divisions include
- a first ring division having on one lateral side a sealing protrusion extending from a coupling surface of the first end to a downstream side of the second end, the coupling surface of the first end abutting the planar surface of the torus part;
- and
- a second ring division having on one lateral side a recess corresponding to the sealing protrusion and extending from the coupling surface of the first end to the downstream side of the second end, and the sealing protrusion engages with the recess so as to seal the one lateral side of the first ring division and the one lateral side of the second ring division.
Dependencies are inferred from the claim text.