Untitled record

The invention relates to a blower, in particular for flushing and charging of internal combustion engines.

There are already known blower with two successive rolling conical surfaces. The coats of two with their tips facing each other conical disks are connected by radially directed, flexible partitions (membranes), which serve to form pressure and suction chambers and for the transmission of movement.

This arrangement has the disadvantage that the flexible partitions, because they are firmly connected to both conical shells, fold up and open again with each revolution of the fan and therefore large bending stresses occur in the partitions. A reduction of these stresses by using thinner partitions are set by the practically still practicable wall thicknesses limits.

In order to avoid a breakage of the partitions as a result of a constantly repeated, sharp buckling, it has also been proposed to engage the partitions at the point where the sharpest bend occurs so far in the two conical discs that the sharpest kink still has a considerable radius , But this brings too much harmful space for the fan with it.

In the present invention, these disadvantages are avoided in that the flexible partitions are attached only to the one rotary body and movably guided in the other rotary body. This design ensures that the flexible partitions are only slightly deformed during rotation.

In the fan according to the invention, two rotary bodies are mounted in a housing, for example two conical discs, or a conical disc and a face plate whose axes are inclined at an angle to each other, such that the generatrix of the one cone to the generatrix of the other Cone or parallel to the face plate. On the one disc, for example, the driven, are a number of flexible partitions, z. As steel or bronze sheets attached. The second disc is with inlet openings, z. As slots provided, in which the radial flexible partitions are movably guided.

An embodiment of the invention will be explained with reference to the drawing.

Fig. I is a longitudinal section through the fan; Fig. II is a cross-section through the fan; Fig. III shows a plan view of the rotating parts with the radial flexible partitions.

In Fig. I, the two rotary bodies b and c are guided in the housing halves a, a 'so that their nearest sides are parallel to the direction of the line A-B.

The space enclosed by the housing a, a ', the inner sealing body f and the rotary bodies b and c is divided into chambers g by a number of flexible partition walls d (FIGS. 1 to 11I) fixed on the rotary body b. The partitions d are movably guided in the rotary body c. The completion of the compression chambers forming surfaces of the housing a, a 'and the inner sealing body f are shaped so that they seal as well as possible with the radial partitions d and the two rotating rotating bodies b and c. These surfaces may be formed according to the shape of the partitions corresponding to approximately cylindrical, conical and finite figure according to spherical.

In each turn of the rotary bodies b and c, an enlargement and then downsizing of the chambers g formed by the partition walls takes place; This results in the nozzle x a suction and the nozzle y a pressure effect. The suction opening x can be arranged on the inner body f or on the housing a, a 'or simultaneously on both. It only needs one of the two rotating body to be driven, since the other is taken through the partitions d.