SU1429209A1 - Centrifugal fan for electric machine - Google Patents

Abstract

The invention relates to electrical engineering. The purpose of the invention is to extract the CTC. The centrifugal fan of an electric machine contains a disk 1, in the grooves of which spring-loaded moving blades 3 are placed. Due to the fact that the blades are flexible and the grooves are L-shaped, the goal is achieved. 5 il.

Description

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The invention relates to electrical engineering and can be used, for example, in automobile generators,

The aim of the invention is to increase K1SC.

Figure 1 shows a centrifugal fan of an electric machine; in fig. 2 shows section A-A in FIG. one ; in fig. 3 - fan disk; 4 shows the fan blade; Figure 5 is the same, cross section I.

The centrifugal fan consists of a disk 1 in which 1g-shaped grooves 2 are made to install the blades 3 in them with the help of protrusions 4. To prevent the blades 3 from falling out, the stops 5 "L" fix the blades 3 in the initial position Springs 6 are installed- I, one end of which: is fixed in the detachment 7 of the blade 3, and the other is behind the ledge 8 of the disk 1.

The fan operates as follows.

Rotating along with the shaft of the electric machine (not shown) on which it is installed, the centrifugal fan creates the necessary vacuum in the housing, providing a cooling air flow.

The power of an automobile generator and its degree of heating increase with an increase in the frequency of rotation of the generator shaft. Therefore, with a small

fan speeds

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3, due to the springs 6, are located at the base of the grooves 2 of the disc 1, providing the necessary air flow rate through the generator. As the rotational speed of the blade 3 increases, under the action of centrifugal force, it moves from the center of the disk 1 to its periphery, overcoming the spring tension force of the spring 6 and the friction force of the protrusions of the wall of the groove 2. At the same time, the diameter Dg increases to DB and, accordingly, increases productivity

The increase in performance depends on the Dg / Dg ratio, which is determined by design or experimental, depending on the design and

modes of operation of the electric machine.

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At the same time, the fan efficiency is increased due to the bending of the blades in the direction of rotation.

25 F o rm y

the invention

A centrifugal fan of an electric machine with an adjustable rotational speed, containing a disk with slots placed on the shaft of the electric machine, in which spring-loaded blades are fixedly movable, which means that the slots are L-shaped to increase efficiency and the blades are flexible .

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Editor O. Yurkovetska

Order 5135/50

VPI of the USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

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Compiler A, Warriors

Tehred A. Kravchuk Proofreader V. Romanenko

Circulation 666

Subscription

Claims (1)

Claim A centrifugal fan of an electric machine with an adjustable speed, containing a disk with grooves located on the shaft of the electric machine, in which spring-loaded blades are mounted with the possibility of movement, characterized in that, in order to increase the efficiency of the manhole, they are L-shaped, and the blades are made flexible. Aa J 429209 Compiled by A. Voinov Editor O. Yurkovetskaya Tehred A. Kravchuk Proofreader V.Romanenko Order 5135/50 Circulation 666 Subscribed VPIIIPI of the USSR State Committee for Inventions and Discoveries 113035, Moscow, Zh-35, Raushskaya nab., D. 4/5 Production and printing company, Uzhhorod, st. Project, 4