SU1536094A1 - Hydrodynamic radial sliding-contact bearing - Google Patents

Abstract

The invention relates to hydrodynamic slide bearings, which take up the radial load in centrifugal pumps and are lubricated by the fluid being pumped by the pump. The purpose of the invention is to increase the separation properties of the bearing. The movable sleeve is made with a nozzle. The inner conical cavity of the nozzle expands toward the end of the sleeve. The diameter of the outer surface of the nozzle is less than the outer diameter of the annular cavity, the diameter of its inner surface is larger than the inner diameter of the annular cavity of the yoke. The height of the nozzle is less than the depth of the annular cavity of the cage. The thickness of the end wall of the nozzle is less than the gap formed by the ends of the lower and upper protrusions of the cage. The inner conical cavity of the sleeve communicates through the nozzle holes with a gap between the nozzle and the sleeve. The presence of a rotating nozzle with an internal conical cavity creates a steady process of separation of the medium in the separation device. This increases the service life of the bearing and the pump as a whole. 1 il.

Description

(21) 4186-866 / 25-27 (22) 01/26/87 (46) 01.15.90. Bul. № 2 (72) V.N. Bogoroditsky, M.A. Sutormin, V.A. Senatorov and A.D.Gusak

(53) 621.822.5 (088.8)

(56) USSR Copyright Certificate No. 1278506, cl. F 16 C 17/00, 1985.

(54) HYDRODYNAMIC RADIAL SLIDING BEARING

(57) The invention relates to hydrodynamic slide bearings, perceiving a radial load.

in centrifugal pumps and lubricated pumped medium. The purpose of the invention is to increase the separation properties of the bearing. The movable sleeve is made with a nozzle. The inner conical cavity of the nozzle expands

toward the end of the sleeve. The diameter of the outer surface of the nozzle is smaller than the outer diameter of the annular cavity, and the diameter of its inner surface is larger than the inner diameter of the annular cavity of the yoke. The height of the nozzle is less than the depth of the annular cavity of the cage. The thickness of the end wall of the nozzle is less than the gap formed by the ends of the lower and upper protrusions of the cage. The inner conical cavity of the sleeve communicates through the nozzle holes with a gap between the nozzle and the sleeve. The presence of a rotating nozzle with an internal conical cavity creates a stable process for the separation of the medium in the separation device. This increases the service life of the bearing and the pump as a whole. 1 il.

S

(L

This invention relates to a hydrodynamic radial slide bearing, perceiving a radial load in centrifugal pumps and lubricated by the fluid being pumped by the pump.

The aim of the invention is to improve the separation properties of the bearing with a separation device.

The drawing shows the bearing, general view, cut.

On the drive shaft 1 of the pump, there is a sleeve 2 connected to the nozzle 3, which has an internal conical cavity 4 and bypass holes 5. Structurally, the nozzle 3 is located in the annular cavity 6 of the yoke 7 and forms an annular cavity 6 two

radial 8yi two face S and about a gap. The annular cavity 6 by the outlet channels 8 is connected to the suction cavity of the pump. The sleeve is installed in relation to the holder 7 with a gap §Ј.

Hydrodynamic radial sliding bearing works as follows.

The pumped medium with mechanical inclusions from the pressure cavity of the pump enters the radial clearance Ј (and moves further in two directions: through the tapping channels 8 and the end clearance o2 In the end clearance §Ј, the medium with mechanical inclusions rotates with approximately half

cl

with

05

ABOUT

with

-U

the angular velocity of rotation of the drive shaft 1. Under the action of centrifugal forces, larger and heavier particles of mechanical inclusions are thrown to the periphery of the annular cavity 6 and through the drainage channels 8 enter the suction cavity of the pump. In this case, smaller and lighter particles of mechanical inclusions through the radial clearance & can get into the inner conical cavity 4 of the nozzle 3. Consider the nozzle 3 as a rotating vessel filled with liquid. At the same time, the medium in the inner conical cavity 4 rotates approximately with the angular speed of rotation of the drive shaft 1, into the medium pressure changes according to a parabolic law in the direction of increasing the periphery of the inner conical cavity 4. Under the action of centrifugal forces, particles of mechanical inclusions move radially and when reaching the peripheral part of the inner part of the conical cavity 4 due to the pressure difference due to the rotation of the medium in the nozzle 3, through the bypass holes 5 enter the radial the gap S, and clarified, the medium through the end gap 54 is directed to lubricate the bearing into the gap S5 between the sleeve 2 and the yoke 7. This creates an additional cleaning of the medium from small mechanical inclusions and, therefore, improves the separation properties of the hydrodynamic radial sliding bearing with separation device at the entrance of the medium with mechanical inclusions (chen.

The presence of a rotating nozzle with an internal conical cavity creates

j 0

five

0

sustainable process of separation of the medium in the separation device and thereby the flow of the clarified medium to the bearing bearing surfaces, which increases the service life of the bearing itself and the pump as a whole.

The tests of the hydrodynamic radial sliding bearing have shown that its service life is increased, as compared with the known hydrodynamic sliding bearing, by approximately two times.

Claims (1)

Invention Formula Hydrodynamic radial sliding bearing, comprising a housing, a holder secured in the housing with an annular cavity and discharge channels, a movable sleeve covered by the holder and a separating device located on the end of the holder, which, in order to improve the separation properties, has a movable sleeve made with a nozzle with an inner conical cavity that expands toward the end of the sleeve, with an outer surface diameter smaller than the outer diameter of the annular cage of the sleeve, and also with an inner diameter the upper surface is larger than the inner diameter of the annular cavity of the cage, and the height of the nozzle is less than the depth of the annular cavity of the cage, and the thickness of the end wall of the nozzle is less than the gap formed by the ends of the lower and upper protrusions of the cage; the gap between the nozzle and the clip. J 3