Patent ID: 8608174
Filing Date: 2013-12-17
Classification: F01D,F05D,F16J

Abstract:
1. A leaf seal device comprises a leaf seal having a plurality of sealing plates of thin plate shape including a connection holding section of an outer circumferential side and a sealing section of an inner circumferential side, the connection holding sections being connected to overlap the sealing plates and to form an annular shape to which a rotary axis is available to fit at a center thereof, wherein each of said connection holding sections of said respective sealing plates is bent at one position of a first bending section in an intermediate portion of said connection holding section thereby forming an inner circumferential side portion and an outer circumferential side portion wherein the inner circumferential side portion is disposed at a first angle θ each of said sealing plates is bent at one position of a second bending section at a boundary between said connection holding section and said sealing section so that said sealing section is disposed at a second angle θ said respective sealing plates are connected by sequentially fitting, such that one side face of said inner circumferential portion and one side face of said outer circumferential portion in said connecting holding section of the sealing plate are respectively in close proximity with another side face of said inner circumferential portion and another side face of said outer circumferential portion in the connecting holding section of the adjacent sealing plates, to fit said respective convex portions of said first bending sections of said plurality of sealing plates in sequence, said sealing section of said respective sealing plates are provided so as to incline with a predetermined angle to said circumferential direction from said second bending sections toward the inner circumferential side, and wherein there is a space between adjacent sealing plates in said sealing section that is determined based on the following formula: where G is the space between the respective sealing plates, P is a pitch of the sealing plates on the inner circumferential line, where the pitch is defined by P=t / sin θ t is a plate thickness of the sealing plate, and θ