DE1261708B - Cooling device for a storage - Google Patents

Description

Storage Cooling Device The present invention relates to a cooling device for a storage, consisting of two equiaxed, one cylindrical Inner surfaces of a bearing housing comprised and each an outer and an inner There is bearing ring having rolling bearings, the rolling bearings at least by a spacer ring arranged between the outer bearing rings at an axial distance are held.

The cooling of such bearings was previously by inserting of material of high thermal conductivity in the outer end faces of the bearing rings causes that with an equally good thermal conductivity and on the outer surface of is in contact with a coolant cooled material. However, this has the disadvantage that the coolant does not directly contact the bearing rings, but via a Intermediate member is in thermal contact, so that the heat transfer coefficient between the coolant and the bearing ring in question is not optimal. Another known way of cooling bearing assemblies is that in the bearing housing even an annular cooling channel is provided, the circulating in this channel Coolant absorbs the heat given off by the bearing to the bearing housing. Even here there is the disadvantage that the coolant does not interact directly with the one to be cooled Bearing rings comes into contact, so that especially with bearing arrangements for with high Speed of rotating waves the cooling effect achieved is insufficient can be.

The invention is based on the object of the coolant in such Bring bearing arrangements directly with the bearing rings in contact and thus the Improve heat transfer without building up the bearing assembly through additional devices to complicate.

This object is achieved according to the invention by a per se Bearings already known, through which a coolant flows and with an inlet and an outlet communicating annular cooling channel in axial Direction through the facing end faces of the outer bearing rings and in the radial direction through the inner surface of the bearing housing and the outer surface of the spacer ring is limited, the outer diameter of which is smaller than the diameter the inner surface of the bearing housing.

The spacer ring preferably has for supplying cooling liquid open small radial openings from the cooling channel as a lubricant to the rolling bearings.

An embodiment of the invention is for example on the basis of Drawings described in which F i g. 1 shows a vertical cross section through the Axis of the machine shaft and F i g. 2 shows a section along the line AA of FIG G. 1 represents.

In the bearing arrangement shown, a horizontal shaft 1 of a machine tool is rotatably held in a stationary bearing housing 2 by means of two ball bearings 3. Each of the ball bearings 3 consists of an inner bearing ring 4, which is fastened on the shaft 1, and an outer bearing ring 5, which is carried in the bore of the housing 2. The two inner bearing rings 4 are kept at a distance from one another by means of a spacer ring 6 and the outer bearing rings 5 by means of a spacer ring 7.

The outer surface of the spacer ring 7 is from the bore of the housing held by means of three screws 8, so that an annular cooling channel 9 is formed is limited by the spacer ring 7, the housing 2 and the adjacent side surfaces the outer bearing rings 5. An inlet 10 and an outlet 11 are formed in the housing, which are in communication with the cooling channel 9, so that oil circulates through the channel can.

The oil circulating through the cooling channel 9 is in direct contact with the outer bearing rings 5 and is therefore responsible for reducing the working temperature very effective.

Optionally, the spacer ring 7 z. B. two small radial through Have openings 13 so that some oil from the cooling channel 9 into the room between the bearing rings. and to the balls and the bearing surfaces of the bearing rings for lubrication can get.

Of course, the invention can be applied in the same way to rolling bearings, whose bearing elements are balls or rollers, are used.

Claims (2)

Claims: 1. Cooling device for a bearing, which consists of two equiaxed roller bearings encompassed by a cylindrical inner surface of a bearing housing and each having an outer and an inner bearing ring, the roller bearings being held at an axial distance at least by a spacer ring arranged between the outer bearing rings , gekenn-markedd ü-r ch an already known in bearings, flowed through by a coolant and with an inlet (10) and an outlet (11) in connection annular cooling channel (9), which in the axial direction through the mutually facing End faces of the outer bearing rings (5) and in the radial direction through the inner surface .des .Bearing housing (2) and -the outer surface @ of the spacer ring (7) be =, the outer diameter of which is smaller than the diameter of the inner surface of the bearing housing. 2. Bearing arrangement according to claim 1, characterized in that the spacer ring (7) for supplying cooling liquid from the cooling channel (9) as lubricant to the rolling bearings has small radial openings (13). References considered: British Patent 14r. -650-792-, USA. Patent Nos 19.99 891st; 2142 931, 2239867.