Platform for compressor or fan blade

Claim 2

A compressor blade platform adapted to define a smooth aerodynamic surface when assembled in a compressor disc, said platform comprising for each blade supported by said compressor disc a pair of complementary elements each having a top platform surface which surfaces are contoured on one edge to closely accommodate the blade extending adjacent thereto, each blade having a root section having end faces extending into a slot formed in the compressor disc, each platform having depending members extending from the ends thereof into said slot adjacent to and in overlapping relation with said end faces of said root section, each of said depending members having means formed thereon for transmitting the load imposed by the rotation of said platform onto said disc independently of the compressor blade.

Claim 3

A compressor blade platform as claimed in claim 1 wherein said means includes a lip portion having a reaction surface bearing against a complementary surface adjacent said end faces of said root section formed in said compressor disc adjacent the slot formed therein and the root section transmits the load of the blade and said means transmits the load of the platform.

Claim 4

A compressor blade platform as claimed in claim 1 wherein said platform includes a side edge outwardly of said contoured edge adapted to engage the next adjacent platform supported in said compressor disc.

Claim 5

A compressor blade platform adapted to define a smooth aerodynamic surface when assembled in a compressor disc, said platform comprising a pair of complementary elements for each blade supported by said disc each having a top substantially flat platform surface which surfaces are contoured on an inner edge to closely accommodate the blade extending adjacent thereto, each platform having depending arms extending from the end thereof into a slot formed in the compressor disc, each of said arms having means formed thereon for transmitting the load imposed by the rotation of said platform onto said disc independently of the compressor blade, said blade having a retention portion having opposing side end faces formed at its root being supported in said slot formed in said compressor disc and said arms being disposed in overlying relation with said end faces.

Claim 6

A compressor blade platform adapted to define a smooth aerodynamic surface when assembled in a compressor disc, said platform comprising a pair of complementary elements for each blade supported by said disc each having a top substantially flat platform surface which surfaces are contoured on an inner edge to closely accommodate the blade extending adjacent thereto, each platform having depending arms extending from the end thereof into a slot formed in the compressor disc, each of said arms having means formed thereon for transmitting the load imposed by the rotation of said platform onto said disc independently of the compressor blade, said blade having a retention portion having opposing side end faces formed at its root being supported in said slot formed in said compressor disc and said arms being disposed in overlying relation with said end faces.

Claim 7

A compressor blade platform as claimed in claim 4 wherein said depending arms are adjacent to and substantially coextensive with said end faces.

Claim 8

A compressor blade platform as claimed in claim 4 including lip portions having force reaction surfaces formed on the lower end of said depending arm, a complementary reaction surface formed on said disc in said slot for receiving the load transmitted by said arms when said platform is rotating.

Claim 9

In combination, a compressor blade, a compressor blade platform adapted to define a smooth aerodynamic surface when assembled in a compressor disc, said compressor blade having a retention formed at its root and supported in a slot formed in the compressor disc, said platform comprising a pair of complementary elements for each blade each having a top substantially flat platform surface which surfaces are contoured on an inner edge to closely surround the blade supported in said compressor disc and extending adjacent thereto, each platform having spaced depending arms substantially dimensioned the length of said retention and extending from the end of said platform into said slot formed in the compressor disc, each of said arms having means formed thereon for transmitting the load imposed by the rotation of said platform onto said disc independently of the compressor blade and each of said arms overlying the side faces of said Root of the blade.

Claim 10

In combination, a compressor blade, a compressor blade platform adapted to define a smooth aerodynamic surface when assembled in a compressor disc, said compressor blade having a retention formed at its root and supported in a slot formed in the compressor disc, said platform comprising a pair of complementary elements for each blade each having a top substantially flat platform surface which surfaces are contoured on an inner edge to closely surround the blade supported in said compressor disc and extending adjacent thereto, each platform having spaced depending arms substantially dimensioned the length of said retention and extending from the end of said platform into said slot formed in the compressor disc, each of said arms having means formed thereon for transmitting the load imposed by the rotation of said platform onto said disc independently of the compressor blade and each of said arms overlying the side faces of said Root of the blade.

Claim 11

The combination as claimed in claim 7 wherein each of said depending arms carries rearwardly relative to said blade facing lip portion, a force reaction surface formed on the upper edge of said lip, a complementary reaction face formed in said disc engaging said reaction surface formed on said lip preventing said platform from moving radially outward with respect to the rotating center line when said platform rotates.