SU875123A1 - Bearing assembly - Google Patents

Description

(54) BEARING KNOT

one

The invention relates to mechanical engineering and can be used in various machines, for example, spindles of practical grandmas of metal cutting stacks.

The closest in technical essence to the present invention is a bearing assembly comprising bearings mounted in the housing and on the shaft, a lubrication system consisting of a pump whose disc is located in a labyrinth seal, and a kangshov supplying lubricants to the bearings and withdrawing it from the drain cavity tH .

A disadvantage of the known site is the increased heat generation due to the mechanical friction between the discs and the body, which ultimately reduces the durability of the node.

The purpose of the invention is to increase the durability of the node.

This goal is achieved by the fact that a bearing assembly containing bearings mounted in the housing and on the shaft, a lubrication system consisting of a pump whose disk is located in a labyrinth seal, and channels for supplying lubricant to the bearings and draining it from the drain cavity.

it is equipped with an umbrella disk fixed on the shaft with a gap relative to the outlet of the lubrication channel, and the grooves are evenly spaced around each end of the pump disk.

The drawing shows the bearing unit, the cut,

Bearing mounted in housing 1

10 2 and cover 3. For supplying lubricant to the bearing 2 in the housing 1 there is an inclined channel 4 and a boring, in which filter 5 is mounted, fixed by ring 6. Inner ring

15 of the bearing 2 is rigidly mounted on the shaft 7. At the lower end of the shaft 7 a rotating cup 8 of a labyrinth-disk seal is fixed. Disks 9 are mounted on the outer surface of the cup 8. 20 Impeller slots are evenly spaced around each end of the disc 9. On the contrary, the outer cylindrical surface of the disk 9 in a non-rotating

25 cups 10 seals are made ka. bays 11 connected through an annular groove on the outer surface of the glass 10 with a diversion channel 12 made in the lid 3 and in the body 1

30 grease. On the shaft 7 is fixedly mounted with a small gap relative to the outlet of the withdrawal channel of the umbrella disk 13. On the side of the boss of the housing 1, a recess is made at the end of the disk 13.

A glass 10 of the labyrinth-disk seal, together with disks 14 rigidly mounted in it, mounted to a floating fit in the bore of the cover 3 and fixed from turning by a screw 15 and an elastic rubber element 16, forms a drain cavity 17 with its internal end and shoulder of the cover 3 parts mounted on the shaft 7 with a special nut 18.

In order to create a closed circulation of lubricant, the outlet channel 12 may be connected to the lubricant supply channel 4 or 19. In addition, the outlet opening of the channel 12 is plugged on the side of the umbrella disc. In the inner circulation circle, it is also possible to install a built-in housing 1 or an external filter for cleaning lubricant, as well as a lubricant cooling system.

Bearing unit works as follows.

When the rotation of the shaft 7, the oil from the centralized lubrication system, the filter 5 passes through the lubricant supply channel 4 to the bearing 2 under the action of the high-speed head of the oil jet. The amount of oil entering the bearing 2 is controlled by the resistance of the filter 5 or the change in the flow rate of the oil jet fed to the filter 5. The jet oil feed improves the performance of the filter compared to the sequential installation of the filter in the channel. When the jet oil supply part of the lubricant passes through the filter 5 and the channel 4 to the bearing 2.

Another part of the lubricant, cooling the bearing assembly from the outside, flows into the lower part of the housing 1. At the same time, a jet of oil is pumped out of the filter 5 to remove solid particles that could get onto the filter 5 along with the lubricant.

Passing the bearing 2, the oil accumulates in the drain cavity 17, the flow enters under the action of centrifugal forces by the developed rotating disk 9 into the channels 11, and then into

The annular groove of the cup 10 and into the channel 12, made in the cover 3 and the housing 1, the initial opening of the channel 12. When the shaft 7 rotates, interacting with the adjacent end of the disk 13, forms an ejector slot, which contributes to the oil outlet from the channel 12 to the external cavity.

Thus, the oil that has passed through the bearing and containing its wear products is removed from

bearing unit in the external cavity, and new portions of oil can get into the bearing 2 only pass filter 5 or the filter in the channel 19. When you stop the rotation of the shaft 7 cup

5 10 under the action of its weight and pressure of the lubricant is shifted down until the appearance of contact between the lateral sides of the discs 9 and 14. This will cause the labyrinth gap to be locked, which

0 BUDBT prevent leakage of mas, la from the node. The elastic rubber element 16 covers the seating surface of the cup 10 and the lid 3, preventing the oil from flowing out.

5 The proposed design of the bearing assembly is more durable than the known ones, since the circulation of oil in the assembly is improved, the incoming oil and the bearings are cleaned with a special filter, and the waste oil, mine bearings, gets into the external cavity.

Claims (1)

1. Patent of Germany No. 1040327, cl. 47 e 1, 1957 (prototype).