SU1208348A1 - Bearing unit - Google Patents

Description

I

The invention relates to mechanical engineering, namely to bearing assemblies, primarily for cryogenic media.

The purpose of the invention is to improve lubrication and cooling by reducing the hydraulic losses in the bearing.

Figure 1 shows the bearing unit, a longitudinal section, figure 2 - section aa in figure 1.

The bearing unit, mainly for cryogenic media, contains a rolling bearing 3 mounted on shaft 2, a lubrication device 4, as well as collectors 5 for supplying and discharging lubricant and equipped with guide vanes 6 fixed in the inlet and outlet headers 5 .

Bearing unit works as follows.

Through the channel from the high-pressure cavity, the cryogenic medium enters the collector 5, from which, at a speed of CB, enters the guide vane apparatus 6, from where it goes directly to the annular gap between the inner race and the cage 7 of the bearing 3 at a speed C. through the gap, the working medium also receives a portable speed and, approximately equal to half the sum of peripheral velocities

(}

S

2083482

the cage and the separator 7. As a result, the velocity of the medium in the bearing 3 decreases, and consequently, its heating decreases. This leads to an increase in the throughput of the annular gap and contributes to a more efficient cooling of the contact areas in the bearing 3. The movement of the working medium behind the bearing is illustrated in Figure 2 by the corresponding velocity triangle, where c is the speed of the working medium on the roller out of the bearing, equal to V7, and - portable speed, W - speed of the working medium at the entrance to the guide vane apparatus 6.

The transfer speed U arises as a result of the fluid layer adjacent to the rotating elements of the bearing engaging in rotation with a speed average between the peripheral speed 2 and the fixed case 1, i.e. approximately with the peripheral speed of the separator 7.

From the output guide vane apparatus 6, the working medium, changing its direction, exits at a speed Cg, parallel to the axis of rotation of the bearing, into the drain manifold 5.

This reduces the heating of the working medium behind the bearing, which is very important for closed cryogenic lubrication systems.

Thanks to this design of the bearing assembly, its lubrication and cooling is improved.

20

25

thirty

35

byk

Fig z

VNIIPI Circulation 777

Order 229/48 Subscription

Branch PPP Patent, Uzhgorod, Project.St.,

Claims (1)

BEARING ASSEMBLY mainly for cryogenic media, comprising a rolling bearing mounted in a housing on the shaft, a lubrication device, as well as manifolds for supplying and removing lubricant, characterized in that, in order to improve lubrication and cooling by reducing hydraulic losses in the bearing, it equipped with guide vanes mounted motionless in the inlet and outlet manifolds. "