초록 ▼

A turbine blade for a gas turbine engine. An existing blade was found to exhibit bowing, or a concave configuration facing the pressure side, along its trailing edge. The invention reduces bowing by (1) changing tilt, (2) changing lean, (3) reducing the number of cooling holes, while (4) changing th

A turbine blade for a gas turbine engine. An existing blade was found to exhibit bowing, or a concave configuration facing the pressure side, along its trailing edge. The invention reduces bowing by (1) changing tilt, (2) changing lean, (3) reducing the number of cooling holes, while (4) changing the diameters of the cooling holes, to maintaining the total cooling flow unchanged.

대표청구항 ▼

A turbine blade for a gas turbine engine. An existing blade was found to exhibit bowing, or a concave configuration facing the pressure side, along its trailing edge. The invention reduces bowing by (1) changing tilt, (2) changing lean, (3) reducing the number of cooling holes, while (4) changing th

A turbine blade for a gas turbine engine. An existing blade was found to exhibit bowing, or a concave configuration facing the pressure side, along its trailing edge. The invention reduces bowing by (1) changing tilt, (2) changing lean, (3) reducing the number of cooling holes, while (4) changing the diameters of the cooling holes, to maintaining the total cooling flow unchanged. ion of said impeller; and at least one housing side coupling portion formed in an outer peripheral surface of said housing to extend in a direction perpendicular to said axial direction of said impeller; and a filter secured to said housing, said filter having: a meshed portion communicated with said inlet opening of said housing to filter said fluid, said meshed portion substantialily covering said inlet opening of said housing; at least one filter side engaging portion engaged with said at least one housing side engaging portion in said direction perpendicular to said axial direction of said impeller; at least one arm portion substantially, perpendicularly extending with respect to said meshed portion of said filter and being resiliently flexible in said direction perpendicular to said axial direction of said impeller; and at least one filter side coupling portion provided to said at least one arm portion and engaged with said at least one housing side coupling portion in said axial direction of said impeller, wherein said filter is secured to said housing upon engagement between said at least one filter side engaging portion and said at least one housing side engaging portion and also upon engagement between said at least one filter side coupling portion and said at least one housing side coupling portion. 4. A fluid pump device according to claim 3, wherein: said at least one housing side engaging portion and said at least one filter side engaging portion are respectively, circumferentially centered at a first predetermined angular position that is radially spaced away from said rotational axis of said impeller; and said at least one housing side coupling portion and said at least one filter side coupling portion are respectively, circumferentially centered at a second predetermined angular position that is radially spaced away from said rotational axis of said impeller and is displaced by about 180 degrees with respect to said first predetermined angular position. 5. A fluid pump device according to claim 3, wherein: said at least one housing side engaging portion includes a plurality of housing side engaging portions; and said at least one filter side engaging portion includes a plurality of filter side engaging portions. 6. A fluid pump device according to claim 3, wherein: said at least one housing side coupling portion includes a plurality of housing side coupling portions; and said at least one filter side coupling portion includes a plurality of filter side coupling portions. 7. A fluid pump device according to claim 3, wherein said at least one housing side coupling portion as well as said at least one filter side coupling portion are respectively, symmetrically arranged about a straight line that extends through said rotational axis of said impeller, through a circumferential center of said at least one housing side engaging portion, and also through a circumferential center of said at least one filter side engaging portion. 8. A fluid pump device according to claim 3, wherein: said at least one housing side coupling portion is in a form of a coupling recess; said at least one filter side coupling portion is in a form of a coupling projection; said filter further includes two or more extended portions that extend radially outwardly away from said meshed portion; said at least one arm portion includes two ore more arm portions that extend from said two or more extended portions, respectively; and each one of said at least one filter side coupling portion is circumferentially placed between corresponding adjacent two of said two or more arm portions. 9. A fluid pump device according to claim 8, wherein said at least one filter side coupling portion has a tapered surface that is tapered in a direction away from said meshed portion of said filter.