SU995208A1 - Electric machine bearing assembly - Google Patents

Description

The invention relates to electrical engineering and can be used in rotating electric machines of low and medium power with non-guaranteed alignment of seating surfaces for bearings.

A bearing assembly is known, consisting of a rolling bearing and an intermediate body enclosing it, with an outer annular spherical surface which rests on the surface of the mechanism housing, the bearing assembly is designed to work in machines and mechanisms in which, due to the frill conditions, it is impossible to ensure coaxiality of the outer seating surfaces for bearings mounted on the same shaft

The disadvantage of the bearing assembly is the small relative width of the mating spherical surfaces.

Closest to the proposed bearing assembly of an electric machine, comprising a bearing shield, a split intermediate housing with an external spherical surface located inside the shield and a rolling bearing 2j located inside the housing.

The support of the sphere of the intermediate corpus on the spherical counter surface.

The shield provides freedom of self-alignment of the bearing. However, the presence of an air gap between the intermediate housing and the bearing shield, together with the small relative width of the equatorial spherical contact surfaces, requires a HIGH precision of their processing, which increases the labor intensity

10 production. The disadvantage of the bearing unit and the bearing unit is also the discrepancy between the size of the equatorial spherical surface of the bearing shield and the requirements of the joint

15 rolling bearings in an intermediate housing with a sliding bearing, which is necessary to provide in unified series of electric machines of various designs.

20

The purpose of the invention is to reduce the labor intensity of manufacturing by unifying the bearing assembly.

This goal is achieved by the fact that in a bearing assembly in the middle

25 parts of the spherical surface of the intermediate body are made of an annular cylindrical protrusion, inside which is located a rolling bearing

Since the supporting surfaces under

Claims (2)

30 of the Lime shield are in contact with the spherical surface of the intermediate body, in the dental part of which there is an annular protrusion covering the rolling bearing and the sphere diameter smaller than the diameter of the specified bearing, the relative width of the spherical surface is greatly increased and conditions are created to reduce the accuracy of machining the adjacent spherical surfaces and solving the problems of unifying the bearing boards of electric machines of various designs. Figure 1 shows the proposed bearing unit, a longitudinal section in figure 2 is an example of unit unification in a bearing shield with a bearing; slip. The bearing assembly contains a rolling bearing 1 mounted on the shaft 2 of the electric machine, the intermediate housing, the bearing bearing — and the two roofs 3 and 4, the adjacent part of the bearing shield 5 and the flange b — are attached by means of a screw 7 with a spring washer 8. bearing shield 5. An intermediate split housing with a part of the spherical surface located on the lining 3 rests on the counter surface of the bearing shield and another part of the spherical surface on the counter surface of the flange b. Thus, an annular cylindrical protrusion 9 coaxially with a spherical surface and intended to accommodate a rolling bearing, the diameter of which exceeds the diameter of the sphere, is formed in the spherical surface of the intermediate split housing. For a clear axial fixation of the bearing 1 in the covers 3 and 4 of the intermediate casing, the internal total length of the cylindrical surfaces is less than the width of the bearing, and the flange b is given elastic properties due to membrane bends. To provide free axial movement of the bearing in the intermediate housing, the total length of the cylindrical surfaces is larger than the width of the bearing. The bearing assembly with the sliding bearing 10 with its external spherical surface rests on the same mating surfaces of the bearing shield 5 and flange b as 3 and 4 of the intermediate housing with the rolling bearing enclosed in it. A felt (or other similar material) soaked in lubricating oil is placed in the free annular volume ц. The use of the invention allows to replace labor-intensive turning and polished technological processes of processing spherical surfaces with less labor-intensive methods of casting and die forging, as well as to unify the bearing plates of small and medium-sized electrical machines of various designs. Claims of the invention A bearing unit of an electric machine, comprising a sub-shield shield, a detachable intermediate housing placed inside the shield with an external sphere surface and a rolling bearing located inside the case, characterized in that, in order to reduce the labor intensity by unifying the bearing unit, in the middle part of the spherical point : The intermediate body of the casing Voug Complete with an annular cylindrical protrusion, inside which is located a rolling bearing, Sources of information taken into account During examination,. Orlov P.I. Design Basics. M., 1977, Vol. 2, s. 524, rice, 484. 2. Krasovsky B.N. Fundamentals of the Structural Transport Electrical Machines. L., 1970, p. 214. 7,8 af.f