BLADE FOR A FAN

Abstract

A blade for a fan that can be arranged on a rotor shaft of a rotor of a rotating electric machine, in particular a generator, wherein the blade is at least partially formed from a fiber composite material that has a polymer matrix with mineral fibers embedded therein. A method for producing a blade for a fan arrangeable on a rotor shaft of a rotor of a rotating electrical machine, in particular a generator, wherein the blade is produced using an injection molding method, and wherein a fiber composite material of a polymer matrix with mineral fibers embedded therein is used as injection molding material.

Claims

1. A blade for a fan arrangeable on a rotor shaft of a rotor of a rotating electrical machine, comprising: a fiber composite material which forms the blade at least in part, wherein the fiber composite material comprises a polymer matrix with mineral fibers embedded therein.

2. The blade as claimed in claim 1, wherein the mineral fibers take the form at least in part of basalt fibers.

3. The blade as claimed in claim 1, wherein the blade takes the form of a rotor blade or a guide vane.

4. A fan for cooling a rotating electrical machine, wherein the fan is arrangeable on a rotor shaft of a rotor of the rotating electrical machine, the fan comprising: at least one blade ring arrangeable rotationally on the rotor shaft and formed of blades, wherein the blades are configured according to claim 1.

5. A method for producing a blade for a fan arrangeable on a rotor shaft of a rotor of a rotating electrical machine, the method comprising: producing a blade using an injection molding method, and using a fiber composite material comprising a polymer matrix with mineral fibers embedded therein as injection molding material.

6. The method as claimed in claim 5, wherein the mineral fibers used are at least in part basalt fibers.

7. The blade as claimed in claim 1, wherein the rotating electrical machine comprises a generator.

8. The fan according to claim 4, wherein the rotating electrical machine comprises a generator.

9. The method according to claim 5, wherein the rotating electrical machine comprises a generator.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0024] An embodiment of a method according to the invention and an embodiment of a blade according to the invention are explained below on the basis of the appended schematic drawings, in which:

[0025] FIG. 1 is a representation of an exemplary embodiment of a method according to the invention; and

[0026] FIG. 2 is a perspective representation of an exemplary embodiment of a blade according to the invention.

DETAILED DESCRIPTION OF INVENTION

[0027] FIG. 1 shows a representation of an exemplary embodiment of a method according to the invention for producing a blade (not shown) for a fan arrangeable on a rotor shaft of a rotor of a rotating electrical machine in the form of a generator.

[0028] In step 1 a polymeric material is mixed with basalt fibers, to obtain a homogeneous mixture of the polymeric material and the basalt fibers. In step 2 the homogeneous mixture is kneaded to obtain a fiber composite material which comprises a polymer matrix with basalt fibers embedded therein. In step 3 the blade is produced using an injection molding method, wherein the fiber composite material produced in step 2 is used as the injection molding material. In step 4 the blade produced in step 3 is heated and thereby finished, for which purpose a walking beam furnace may be used, for example. In step 5 a blade finished in step 4 may be put to use or warehoused. Alternatively, in step 6 the blade finished in step 4 may undergo post-processing, before it is put to use or warehoused in step 5.

[0029] FIG. 2 is a perspective representation of an exemplary embodiment of a blade 7 according to the invention for a fan (not shown) arrangeable on a rotor shaft (not shown) of a rotor of a rotating electrical machine. The blade 7 is formed at least in part of a fiber composite material, which comprises a polymer matrix with mineral fibers embedded therein. The mineral fibers take the form at least in part of basalt fibers. The blade 7 takes the form of a rotor blade. The blade 7 comprises a blade root 8, by means of which the blade 7 may be attached to the rotor shaft. Furthermore, the blade 7 comprises a blade leaf 9 protruding from the blade root 8.

[0030] Although the invention has been illustrated and described in greater detail with reference to the preferred exemplary embodiments, the invention is not restricted by the disclosed examples and other variations may be derived therefrom by a person skilled in the art without going beyond the scope of protection of the invention.