Assembly type nozzle diaphragm, and method of assembling the same
First Claim
1. An assembled nozzle diaphragm comprising:
- a diaphragm outer ring having a groove opened toward an inner diameter side to be continuous in an inner peripheral direction of the diaphragm outer ring;
a diaphragm inner ring having a groove opened toward an outer diameter side to be continuous in an outer peripheral direction of the diaphragm inner ring; and
a nozzle blade having an insertion portion for the diaphragm outer ring provided on one end and an insertion portion for the diaphragm inner ring provided on the other end, wherein the groove opened toward the inner diameter side of the diaphragm outer ring and the diaphragm outer ring insertion portion of the nozzle blade are shaped to be fitted to each other only in a circumferential direction of each of the groove and the diaphragm outer ring insertion portion, and the groove opened toward the outer diameter side of the diaphragm inner ring and the diaphragm inner ring insertion portion of the nozzle blade are shaped to be fitted to each other only in one of circumferential direction and diameter direction of each of the groove and the diaphragm inner ring insertion portion.
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Accused Products
Abstract
An assembled nozzle diaphragm according to the present invention includes a diaphragm outer ring 15 having a groove 23 opened toward an inner diameter side to be continuous in an inner peripheral direction of the diaphragm outer ring 15; a diaphragm inner ring 16 having a groove 28 opened toward an outer diameter side to be continuous in an outer peripheral direction of the diaphragm inner ring 16; and a nozzle blade 14 having a diaphragm outer ring insertion portion 12 on one end and a diaphragm inner ring insertion portion 13 on the other end, in which the groove 23 opened toward the inner diameter side of the diaphragm outer ring 15 and the diaphragm outer ring insertion portion 12 of the nozzle blade 14 are shaped to be fitted to each other only in a circumferential direction of each of the groove 23 and the diaphragm outer ring insertion portion 12, and in which the groove 28 opened toward the outer diameter side of the diaphragm inner ring 16 and the diaphragm inner ring insertion portion 13 of the nozzle blade 14 are shaped to be fitted to each other only in one of circumferential direction and diameter direction of each of the groove 28 and the diaphragm inner ring insertion portion 16. According to this structure, the assembled nozzle diaphragm and an its assembling method can be provided so as to be capable of modifying and simplifying a structure of a turbine nozzle and facilitating assembling working without performing welding operation.
53 Citations
25 Claims
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1. An assembled nozzle diaphragm comprising:
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a diaphragm outer ring having a groove opened toward an inner diameter side to be continuous in an inner peripheral direction of the diaphragm outer ring;
a diaphragm inner ring having a groove opened toward an outer diameter side to be continuous in an outer peripheral direction of the diaphragm inner ring; and
a nozzle blade having an insertion portion for the diaphragm outer ring provided on one end and an insertion portion for the diaphragm inner ring provided on the other end, wherein the groove opened toward the inner diameter side of the diaphragm outer ring and the diaphragm outer ring insertion portion of the nozzle blade are shaped to be fitted to each other only in a circumferential direction of each of the groove and the diaphragm outer ring insertion portion, and the groove opened toward the outer diameter side of the diaphragm inner ring and the diaphragm inner ring insertion portion of the nozzle blade are shaped to be fitted to each other only in one of circumferential direction and diameter direction of each of the groove and the diaphragm inner ring insertion portion. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. An assembled nozzle diaphragm comprising:
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a diaphragm outer ring having a groove opened toward an inner diameter side to be continuous in an inner peripheral direction of the diaphragm outer ring;
a diaphragm inner ring having a groove opened toward an outer diameter side to be continuous in an outer peripheral direction of the diaphragm inner ring; and
a nozzle blade having an insertion portion for the diaphragm outer ring provided on one end and an insertion portion for the diaphragm inner ring provided on the other end, wherein the diaphragm inner ring includes a nozzle blade inner periphery-side member formed integrally with the nozzle blade. - View Dependent Claims (19)
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20. An assembled nozzle diaphragm comprising:
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a diaphragm outer ring having a groove opened toward an inner diameter side to be continuous in an inner peripheral direction of the diaphragm outer ring; and
a nozzle blade having an insertion portion for the diaphragm outer ring provided on one end and a diaphragm inner ring provided on the other end, wherein a plate is inserted into the diaphragm inner ring.
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21. A method of assembling a nozzle diaphragm which comprises:
- a diaphragm outer ring having a groove opened toward an inner diameter side to be continuous in an inner peripheral direction of the diaphragm outer ring;
a diaphragm inner ring having a groove opened toward an outer diameter side to be continuous in an outer peripheral direction of the diaphragm inner ring; and
a nozzle blade having an insertion portion for the diaphragm outer ring provided on one end and an insertion portion for the diaphragm inner ring provided on the other end,said method comprising the steps of;
working the diaphragm outer ring to be divided in half to a diaphragm outer ring upper half portion and a diaphragm outer ring lower half portion at a horizontal joint surface position substantially at 180 degrees so as to constitute the diaphragm outer ring of a ring body;
working the diaphragm inner ring to be divided in half to a diaphragm inner ring upper half portion and a diaphragm inner ring lower half portion at a horizontal joint surface position substantially at 180 degrees so as to constitute the diaphragm inner ring of the ring body;
fitting the diaphragm outer ring insertion portion of the nozzle blade from a horizontal joint surface of one of the diaphragm outer ring upper half portion and the diaphragm outer ring lower half portion toward a horizontal joint surface of the other one of the diaphragm outer ring upper half portion and the diaphragm outer ring lower half portion to sequentially insert, one by one, the nozzle blades of a preset number in a circumferential direction;
fixing the plurality of inserted nozzle blades by stopper pieces on the horizontal joint surfaces of the one half portion and on the horizontal joint surface of the other half portion, respectively;
inserting the diaphragm inner ring upper half portion and the diaphragm inner ring lower half portion into the inner ring insertion portion of the nozzle blade from an inside diameter direction of the inner ring insertion portion;
fixing the plurality of inserted nozzle blades by stopper pieces on the horizontal joint surface of the inserted diaphragm inner ring upper half portion and the horizontal joint surface of the inserted diaphragm inner ring lower half portion, respectively; and
fixing the diaphragm inner ring upper half portion and the diaphragm outer ring upper half portion integrated with the nozzle blades of the preset number to the diaphragm inner ring lower half portion and the diaphragm outer ring lower half portion integrated with the nozzle blades of the preset number on the respective horizontal joint surfaces. - View Dependent Claims (22, 23, 24, 25)
- a diaphragm outer ring having a groove opened toward an inner diameter side to be continuous in an inner peripheral direction of the diaphragm outer ring;
Specification