SU1667197A1 - Bearing housing of electric machine - Google Patents

Abstract

The invention relates to electrical engineering. The purpose of the invention is to reduce mechanical vibrations. The bearing shield of an electric machine contains annular zones curved in opposite directions with radial ribs 2, 4. By virtue of the fact that the zones are made in the form of concentric corrugations connected by ribs in a checkerboard pattern, this goal is achieved. 2 Il.

Description

The invention relates to electrical engineering, in particular to the supporting parts of electrical machines.

The purpose of the invention is the reduction of mechanical vibrations.

Figure 1 shows a bearing shield, General view; figure 2 is a section aa in figure 1.

The bearing shield contains an outer annular zone 1 with radial ribs 2, an inner annular zone 3 with radial ribs 4 and a hub 5. The annular outer zone 1 and the inner annular zone 3 are made in the form of concentric corrugations 6, an annular protrusion on one annular zone and an annular cavity another zone are located at one radial level. Corrugations adjacent in the radial direction are interconnected by radial ribs 2 and 4, and these ribs are displaced relative to each other in a checkerboard pattern. Thus, the ribs are distributed so that there are no ribs located one next to the other in the radial direction. Each rib provides sufficient rigidity inside the corrugation, and the corrugations themselves have the ability to bend relative to other ribs by a small amount.

During operation of the electric machine, the bearing shield is exposed to various dynamic loads in the axial and radial directions. When the rotor shaft rotates, vibration from the bearing is transmitted to the hub 5, then to the corrugations 6, which dampen these vibrations due to their damping properties. Damping properties arise as a result of the formation of a bending moment inside the corrugation 6 and the bending moment of the corrugations relative to the radial ribs 2 on the outer annular zone 1 and relative to the radial ribs 4 on the inner annular zone 3. The bending moment of the corrugations relative to the radial ribs occurs due to their staggered arrangement on the outer and inner annular zones. Vibrations that are already significantly reduced are transmitted to the motor frame from the bearing shield. Thus, the mechanical vibrations of the entire electric motor are reduced.

The use of the invention in comparison with known technical solutions can significantly reduce the mechanical vibrations that occur in the bearing assembly and transmitted to the frame of the electric motor, which. in turn, reduces noise and increases the life of the electric machine. In addition, due to the corrugation, an increased surface area of the shield for cooling is maintained. but without unnecessary stiffness, but rather with an additional damping function.

Claims (1)

Claim The bearing shield of an electric machine with surface cooling, containing outer and inner annular zones curved in opposite directions with radial ribs, characterized in that, in order to reduce mechanical vibrations, the annular outer and inner zones are made in the form of concentric corrugations, radially adjacent from which interconnected by radial ribs located on the inner and outer concentric zones or on one of them and offset relative to each other around the circumference in staggered, with the annular protrusion on one annular zone and the annular cavity on the other zone are located at the same radial level.