DD273339A1 - DEVICE FOR SEALING ELECTRIC DRIVING MOTORS - Google Patents

Abstract

The application of the inventive solution is carried out in the maintenance of electric traction motors during the external cleaning of the motor housing with water. The object of the invention is to seal the Lueftungsoeffnungen in the electric traction motors waterproof without the aid of fasteners. According to the invention, the object is achieved by using self-adhesive sealing devices both for plane and also for curved housing surfaces by suitable combination of sheets of ferromagnetic or non-ferromagnetic material, of permanent magnets and elastic sealing material and by appropriate shaping. The benefits of the solution include improving working and living conditions, reducing working hours and saving energy.

Description

Inventor:

Dipl.-Ing. »Porner, Eerthold

Device, for sealing electric traction motors

Field of application of the invention:

The invention relates to a device for sealing electric traction motors. The application of the solution according to the invention takes place during the maintenance of electric traction motors, during which no water may penetrate through the ventilation openings into the motor interior during the external cleaning. Furthermore, this device is suitable for sealing other units with housings made of ferromagnetic material, which should also be protected against the influx of water into the interior.

Characteristic of the known state of the art:

The sealing of the ventilation openings on the electric drive motor during external cleaning of the motor housing with water is not always practiced. »The insulation value of the motor is greatly reduced by the ingress of the water, which can then be restored by an energy-intensive drying process»

Although the attachment of Abdichtblechen on the ventilation openings prevents the ingress of water, but in the disassembly and assembly by a large number of screw is very time consuming »Same applies to the attachment described in DE OS 2 331 623 for the fan cowl or

Similarly designed annularly closed parts to Elektromotoran by screw.

From the patent literature two Abdichtraöglichkeiten on electric motors are also known. DE 03 3 422 235 describes an electric motor in which the sealing takes place by means of sealing foil. According to DE OS 3 516 213, a water seal for an electric motor is realized in that an elastic member of rubber odur another elastic material covers the outer circumferential surface of the stator. Both solutions relate to the construction of electric motors. Their disadvantage is that they are not applicable in the maintenance, v / eil they would cover the surfaces to be cleaned. The abovementioned possibilities of sealing have in summary the disadvantages of poor working conditions, labor costs and unsuitability in the field of rational maintenance.

Object of the invention:

The object of the invention is to prevent the penetration of water into the electric traction motor during the external cleaning by creating a seal of the ventilation openings. The useful effect in the application of the invention compared to known solutions in the improvement of working and living conditions, in the saving of energy by avoiding subsequent complicated drying processes, in the working time savings by eliminating the screw and thus in the increase in labor productivity.

Explanation of the essence of the invention:

The invention has for its object to develop sealing devices for ventilation openings in housings of electric traction motors, which are used on flat and in a modified form on curved surfaces.

The device must be designed so that it sits immovably and tightly on the opening, so that the water emerging from a rotating nozzle ring under pressure does not cause any displacement or jamming.

Erfindungsgomäß the object is achieved in that the opening in the motor housing is sealed by a suitable combination of sheets of ferromagnetisehern or non-ferromagnetic material between which there are rows of permanent magnets and elastic sealing material, for example sponge rubber / Through which between Abdichtvorrichfcui * «; The adhesive force is suitable for holding the sealing device against the motor housing when the pressurized water impinges on the motor housing and pressing the elastic sealing material against the housing surface in a form-fitting and water-tight manner. By choosing the shape and construction, the Abdichtvorrichtungon are suitable for use both on flat and curved housing surfaces.

EXAMPLES

The invention will be explained in more detail below with reference to two exemplary embodiments.

Pig. 1: a self-adhesive sealing device for flat housing surfaces,

Pig · 2: the sectional view from Pig. 1,

Pig. 3: a self-adhesive sealing device for curved housingsurfaces,

4 shows the sectional view from FIG. 3.

example 1

according to Fig. 1 and Fig. 2;

The main body of a self-adhesive sealing device for a flat housing surface 1 consists of an all-round beveled ferromagnetic sheet 3 "The fold serves to increase stability and the protection of an elastic sealing material 5. According to the dimensions of a vent opening 2 is a sufficient number of permanent magnets 4 in rows with an elastic adhesive glued into the interior of the folded ferromagnetic sheet 3 alternately poled · This arrangement serves to achieve a magnetic flux. The thickness of the elastic sealing material 5 is dimensioned such that the support of the permanent magnets 4 on the flat housing surface 1 is ensured. The elastic sealing material ^l 5 provides a watertight seal between the sealing device and the flat housing surface 1. A handle 6 on the ferromagnetic sheet 3 allows dag removing the device from the flat housing surface 1,

Example 2

according to FIG. 3 and FIG. 4:

A non-ferromagnetic cover plate 9 is connected watertight with four xerromagnetic web plates 8 with incorporated radius of a curved housing surface. The arrangement of the four ferromagnetic web plates 8 corresponds to the dimension of a ventilation opening 12 in the curved Gehäusoberflächa 7 · Between each two ferromagnetic web plates 8, a sufficient number gleichpolpolter permanent magnets 10 is glued, which generate in conjunction with the ferromagnetic motor housing a magnetic flux. Furthermore, located between the ferrora magnetic web plates 8 under the permanent magnets 10 and on the inner surfaces of the folded sides of the non-ferromagnetic cover plate 9, an elastic sealing material 11 which is arranged so that the support of the magnetically active parts is ensured on the curved housing surface 7.

The elastic sealing material 11 ensures a watertight seal between the coating device and the curved housing surface 7. A handle 6 makes it possible to remove the sealing device from the curved housing surface 7.

Claims (1)

Invention claim: 1. A device for sealing electric traction motors, in particular flat housing surfaces, characterized in that in the interior of an all-round beveled ferromagnetic sheet (3) in a plurality of rows a sufficient number alternately poled permanent magnets (4) are located whose distance from each other is greater than the width a vent (2) and the free space in the ferromagnetic sheet (3) by an elastic sealing material (5) is filled, which exceeds the height of a permanent magnet (4) by a little in the thickness and the ferromagnetic sheet (3) has a handle (6 ) is arranged. Device according to Ahspt-uAMn modified form, in particular for curved housing surfaces, characterized in that each two provided with the radius of a curved housing surface (7) ferromagnetic web plates (8) whose interspaces with a sufficient number of equally poled permanent magnets (10) and slightly above the ferromagnetic web lead (8) projecting, on the radius of the curved housing surface (7) tailored elastic sealing material (11) are filled and their connection by a two-sided bent non-ferromagnetic cover plate (9) with handle (6) in at least the width of a ventilation opening ( 12) corresponding distance from each other, wherein the inner surfaces of the folded sides of the non-ferromagnetic cover plate (9) are also covered with slightly protruding elastic sealing material (11), - See 1 page drawings -