SU274300A1 - STEP OF TURBO - Google Patents

Description

Steps of a turbomachine are known, for example, axial compressors containing blade vanes of the guide vane and the impeller made of fiberglass.

The proposed step differs from the known ones in that the blade rims are made in the form of conjugated along the vertical walls constituting the blade profile of the closed frames, the upper and lower walls of which form annular bands.

Such an implementation of the stage of the turbomachine will allow to increase the rigidity of blade blades.

FIG. 1 schematically shows the frame of the blade of the crown; in fig. 2-blade crown of the impeller; in fig. 3 - blade crown guide apparatus.

The frame of the blade of the axial compressor is made by winding continuous Fiberglass, glass fiber, pre-impregnated with a binder material.

Vertical walls / and 2 frames, in axial section representing the HALF profile of the blade, are bounded on the outside by the middle line of the profile 3.

the walls of the frame form, respectively, a part of the upper and lower gangstock to it.

The blade stage crown (see Fig. 2) is assembled from three-dimensional volume elements 8 and a metal ring 9. When assembled, the vertical walls of the frames are joined to form the full profile of the blade, and the upper and lower walls form an annular bandage and. To mount the blade crown to the compressor rotor in

the pressing device lays the metal ring 9, which is sprocketing on the outer surface of the sprocket. STANDS 10 asterisks fall into the hollow of the lower band of the shoulder of the crown and serve to transmit the Kpv torque.

On the inner surface of the metal

rings are made slits // for connection

with rotor. The number of STARS asterisk is

The number of blades and can be both even

and odd.

To design the flow-through part and fix the crown in the axial direction, insert liners 12 with a foam core are installed. On the protruding hangers 13 liners 12 are wound with bandages /4. The upper bandage can be reinforced with additional winding. Medial installation of the rotor disk in the device for crimping and assembling the blade ring. To increase the strength and rigidity of the blade rim of the guide apparatus, made similarly (see Fig. 3), the upper bandage can be reinforced by winding fiberglass or fiberglass 15, the inner bandage can be strengthened with an additional ring 16 made of fiberglass with metal reinforcement.

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Rig-3 Subject of the Invention A turbomachine stage, for example, an axial compressor, contains blades of the guide vane and impellers made of fiberglass, characterized in that, in order to increase rigidity, the blades of the blades are made in the form of conjugated vertical walls the profile of the blade, closed frames, the upper and lower walls of which form annular bandages.