RU2661376C1 - Turbomachine with grease lubricant rotor support - Google Patents

Abstract

FIELD: engines and pumps.

SUBSTANCE: invention relates to the field of engines building, in particular of aviation application, namely to rotary machine bearings lubricating devices operating on a grease lubricant. Turbomachine with grease rotor support contains a hollow shaft (1), body (2), bearing (3) with outer (4) and inner (5) rings, separator (6) and rolling bodies (7), made in the hollow shaft (1) and the body (2) cooling channels (8), cavities (9) with the used grease, made in the covers (10), installed in the body (2) on both sides of the bearing (3). Support comprises grease supply device (11) including cylinder (12) mounted in the shaft (1) with the filled with grease cavity (13). On one side cavity (13) is pressed by the made in the form of graphite piston (15) pushing element (14), pressed by the elastic element (16) contacting the fixed in the cylinder (12) cover (17), and from the other side is communicating with the oil supply channels (18) through the holes (19) in the cylinder (12), communicating with the inner ring (5), containing at least one groove (20). Graphite piston (15) central part contacts the mechanically connected to the body (2) stationary rod (21).

EFFECT: increase in the turbomachine with grease lubricant rotor support operating life due to grease supply device.

1 cl, 2 dwg

Description

The invention relates to the field of engine engineering, in particular for aviation applications, and in particular to devices for lubricating bearings of a rotary machine operating on grease.

A device for lubricating friction surfaces is known (Copyright certificate SU 1830125 A3; class F16N 7/08, claimed 05.03.1991), comprising a bearing, a grease reservoir, a grease supply device.

A disadvantage of the described construction is that fresh grease is supplied to the bearing from the grease supply device by heating the bearing. At the same time, an increase in temperature affects the properties of the lubricant, which negatively affects the life of the entire device.

Known shaft support, selected as a prototype (copyright certificate 85588, IPC F16C 37/00, published 10.08.2009) containing a hollow shaft, housing, bearing with outer and inner rings, a cage and rolling elements, cooling channels made in a hollow shaft and housing, spent grease cavities made in caps installed in the housing on both sides of the bearing.

The disadvantage of the existing prototype is the ineffective lubrication of the bearing elements due to the lack of a grease supply device that allows the supply of grease to all necessary contact areas of the bearing elements, which significantly reduces the service life of the bearing as a whole.

The technical result achieved in the claimed invention is to increase the operational resource of the support of the rotor of the turbomachine with grease due to the device for supplying grease.

The technical result is achieved by the fact that the rotor support of the turbomachine with grease containing a hollow shaft, a housing, a bearing with outer and inner rings, a cage and rolling elements, cooling channels made in a hollow shaft and housing, cavities with spent grease, made in the covers mounted in the housing on both sides of the bearing.

New in the invention is that the rotor support of the grease turbomachine comprises a grease supply device including a cylinder mounted in a shaft with a cavity filled with grease, pressed on one side by an ejection element made in the form of a graphite piston, preloaded by an elastic element contacting with a cover fixed in the cylinder, and on the other hand communicated with oil-supplying channels through holes in the cylinder, in communication with the inner ring of the bearing, containing at least one groove, while the central part of the graphite piston is in contact with a fixed rod mechanically connected to the bearing housing.

The increase in the service life of the support of the rotor of the turbomachine with grease is achieved through the supply of grease, which allows you to continuously apply a new portion of the grease at maximum operating conditions to the bearing elements, followed by displacement from the bearing and deposition of spent grease in the respective cavities.

The invention is illustrated by drawings, where

in FIG. 1 - support at the beginning of engine operation,

in FIG. 2 - support at the end of engine operation.

Grease-lubricated rotor support of a turbomachine, comprising a hollow shaft 1, a housing 2, a bearing 3 with an outer 4 and an inner 5 rings, a separator 6 and rolling elements 7, cooling channels 8 made in the hollow shaft 1 and the housing 2 (Fig. 1, 2 )

The cavity 9 with spent grease, made in the caps 10 installed in the housing 2 on both sides of the bearing 3 (Fig. 1, 2).

The rotor support of the grease turbomachine comprises a grease supply device 11, including a cylinder 12 mounted in a hollow shaft 1 with a cavity 13 filled with grease (Fig. 1, 2).

The cavity 13 is pressed on one side by an ejection element 14, made in the form of a graphite piston 15, pressed by an elastic element 16, in contact with a cover 17 fixed in the cylinder 12, and on the other hand communicated with the oil-supplying channels 18 through holes 19 in the cylinder 12, in communication with the inner ring of the bearing 5, containing at least one groove 20 (Fig. 1, 2).

The Central part of the graphite piston 15 is in contact with a fixed rod 21, mechanically connected with the housing 2 of the bearing 3 (Fig. 1, 2).

The rotor support of the grease turbomachine operates as follows.

When assembling the bearings fill the cavity 13 of the cylinder 12 and the bearing 3 with grease (Fig. 1, 2).

During operation, the cooling of the outer 4 and inner 5 rings of the bearing 3 is carried out by air passing through the cooling channels 8 made in the hollow shaft 1 and the housing 2 (Fig. 1, 2).

At reduced engine operating conditions, the friction of the graphite piston 15 against the stationary rod 21 is negligible, there is no controlled wear, and the lubricant does not enter the bearing (Fig. 1, 2).

At maximum engine operating conditions, the friction of the graphite piston 15 against the fixed rod 21 increases, and controlled wear begins. The graphite piston 15 is shifted to reduce the volume of the cavity 13 with grease that enters through the holes 19 of the cylinder 12, the oil supply ducts 18 of the shaft 1 and the grooves 20 of the inner ring 5 to the rolling elements 7 and the cage 6 bearing 3. The spent grease settles in the cavities 9 of the covers 10 The pace of lubricant supply and the service life of the support depend on the roughness of the fixed rod 21, the force of the elastic element 16 and the volume of the cavity 13 (Fig. 1, 2).

The use of this design allows to increase the service life of the support of the rotor of the turbomachine with grease by increasing the service life of the support of the rotor of the turbomachine due to the grease supply device.

Claims (1)

Grease-lubricated rotor support of a turbomachine, comprising a hollow shaft, a housing, a bearing with outer and inner rings, a cage and rolling elements, cooling channels made in the hollow shaft and the housing, cavities with spent grease, made in the covers installed in the housing on both the sides of the bearing, characterized in that it contains a grease supply device comprising a cylinder mounted in a shaft with a cavity filled with grease, pressed on one side by an ejector element, made in the form of a graphite piston, pressed by an elastic element in contact with a cover fixed in the cylinder and, on the other hand, in communication with oil supply channels through holes in the cylinder, in communication with the inner ring of the bearing containing at least one groove, while the central part of the graphite piston in contact with a fixed rod mechanically connected to the bearing housing.

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