DE10346785B3 - Lubricant distributor for axial bearing consists of a radial groove containing control ring to distribute lubricant - Google Patents

Abstract

The distribution device (1) to distribute lubricant in an axial bearing (2) for taking axial forces of a rotating shaft (3) opposite a fixed wall (5) and with the channel (4) to supply lubricant to the bearing. There is a radial groove (6) in the bearing, containing a control ring (7) to distribute the lubricant uniformly within the bearing.

Description

The The invention relates to a device for distributing lubricant in a thrust bearing according to the preamble of claim 1 and 6.

From the DE 42 18 145 C1 is a thrust bearing with lubricant supply in an exhaust gas turbocharger known. About the thrust bearing, a shaft is supported on a stationary wall. Due to the displacement of the shaft within the axial play, the gap reduces on the loaded bearing side and increases on the unloaded bearing side. As a result, the larger lubricant volume flow flows unused on the unloaded bearing side. On the loaded bearing side, however, there is a lack of lubricant. Since the life of a thrust bearing is largely determined by the lubrication, unequal lubricant distribution is problematic.

The US 4,453,837 discloses a device for distributing lubricant in a thrust bearing. The thrust bearing absorbs the axial forces from a shaft flange of a rotating shaft relative to a stationary wall. Opposite the wall, the thrust bearing is stationary. In the thrust bearing a radially extending groove for supplying the lubricant is provided. Opposite the shaft, the thrust bearing has a U-shaped contour. During operation, the lubricant is supplied via the radial groove to a reservoir. From this, the contact surfaces are supplied with the lubricant via axial bores. The thrust bearing is expensive to manufacture in the area of the axial bores and the contact surfaces. Another critical factor is the fact that, when the shaft flange adjoins the thrust bearing, the larger amount of lubricant is still directed to the unloaded side.

Of the Invention is based on the object, the lubricant distribution at a To improve thrust bearings.

The The object is solved by the features of claim 1 and claim 6. The Embodiments are shown in the subclaims.

In a first embodiment the invention is for a thrust bearing with radial groove and U-shaped contour across from the shaft provided that a control ring is arranged on the shaft. The control ring for lubricant distribution engages the groove in the way that a lubricant volume flow is directed to the loaded bearing side and on the unloaded Store side throttled or shut off. This is on the control ring a sealing ridge provided for engagement with the groove. The tax ring is non-rotatable or axially slidable as slotted piston ring arranged the shaft.

In a second embodiment the invention, the thrust bearing is rotatably mounted on the shaft and has a trapezoidal shape Groove. The control ring is firmly connected to the wall, this being for lubricant distribution in the trapezoidal groove of the thrust bearing in engages the type that a lubricant volume flow on the loaded Bearing side is steered and throttled on the unloaded bearing side or shut off.

The Invention has the overall advantage that by the axial path the shaft, the lubricant control column are changed so that the lubricant flow rate preferably is directed to the loaded bearing side. The unloaded Bearing side is throttled or shut off. An additional Axial sealing effect for unloaded bearing side results from the hydraulic pressure in the control gap of the loaded bearing side with axially displaceable control ring. As a control ring a slotted Piston ring is used, the thrust bearing can be made in one piece. This results in an improved assembly. Generally offers the invention has the advantage that the lubrication and cooling by a controlled lubricant supply to the loaded bearing side clearly is improved. At the same time, the lubricant flow rate be reduced.

In The drawings show the preferred embodiments.

It demonstrate:

1 a sectional view with axially fixed control ring;

2 a sectional view with axially displaceable control ring;

3 a sectional view with trapezoidal control ring.

The 1 shows a device 1 for distributing lubricant comprising a thrust bearing 2 and a tax ring 7 , The further explanation takes place together with the detail X. The control ring 7 is rotatable on a shaft 3 arranged. This runs in a U-shaped groove 6 of the thrust bearing 2 , The thrust bearing 2 is with play between a shaft collar 9 and a shaft flange 8th arranged. So that the thrust bearing 2 it can be mounted in two parts, z. B. in the axial or radial direction. In 1 is this thrust 2 divided in two in the radial direction. About a channel 4 becomes the axial bearing 2 supplied with lubricant. The wave 3 supports itself over the shaft flange 8th and the thrust bearing 2 on a stationary wall 5 from.

The device has the following functionality: On the shaft 3 is an axial force F - seen in the plane of the drawing - exerted, for example, to the left. This is the tax ring 7 over a sealing bar 11 at the groove 6 of the thrust bearing 2 to the system, see detail X. A room 13 inside the groove 6 is through the tax ring 7 opposite an oil groove 10A locked. The lubricant volume flow from the duct 4 will be via the room 13 , a passage 12 to the oil groove 10B guided. The lubricant volume flow is indicated by corresponding arrows. The loaded side of the thrust bearing 2 opposite the shaft flange 8th is lubricated or cooled by the lubricant volume flow.

The 2 shows the same arrangement as 1 , In contrast to this is at the 2 however, the tax ring 7 displaceable in the axial direction. For this purpose, the tax ring 7 be designed as a slotted piston ring. By squeezing it becomes in a groove of the wave 3 assembled. Even if the axial clearance increases over the life, incorporation of the ring flanks is prevented in the groove flanks. In this embodiment, the thrust bearing 2 one piece. The gap between the thrust bearing 2 and the shaft collar 9 is greater than the difference groove width (groove 6 ) to the width of the control ring 7 , As a result, when changing the direction of force of the control ring 7 moved so that the lubricant supply to the unloaded side is closed and opened to the loaded side. An additional axial sealing effect for the unloaded bearing side results from the hydrostatic pressure in the control gap of the loaded bearing side, ie the thrust bearing 2 to the shaft flange 8th , For the functionality that applies to 1 Said.

The 3 shows a device 1 for the distribution of lubricant in a thrust bearing 2 , which rotatably with the shaft 3 connected is. The tax ring 7 is stuck to the wall 5 connected. In this embodiment, the control ring has 7 a trapezoidal contour. This runs in a corresponding thereto trapezoidal groove 6 of the thrust bearing 2 , Will on the shaft 3 an acting in the axial direction of force F - seen in the plane of the drawing - exerted to the left, so comes the thrust bearing 2 on the wall 5 to the plant. At the same time comes an area 15 of the thrust bearing 2 on a surface 14 the control ring 7 to the plant and closes the room 13 opposite the passage 12 , The lubricant volume flow from the duct 4 is about the room 13 to the oil groove 10A on the loaded side of the thrust bearing 2 directed.

Of course, the tax ring 7 of the 1 and 2 as well as the tax ring of the 3 be executed, ie trapezoidal. This does not change the functionality.

1

Facility

2

thrust

3

wave

4

channel

5

wall

6

groove

7

control ring

8th

shaft flange

9

shaft collar

10

oil grooves

11

sealing land

12

passage

13

room

14

area

15

area

Claims (6)

Facility ( 1 ) for the distribution of lubricant in a thrust bearing ( 2 ), which axial forces of a rotating shaft ( 3 ) against a fixed wall ( 5 ) and with a channel ( 4 ) for supplying lubricant to the thrust bearing ( 2 ), wherein the thrust bearing ( 2 ) with the wall ( 5 ) and the thrust bearing ( 2 ) a radially extending groove ( 6 ) with U-shaped contour opposite the shaft ( 3 ), characterized in that a control ring ( 7 ) on the shaft ( 3 ) and the control ring ( 7 ) for lubricant distribution in the groove ( 6 ) engages in such a way that a lubricant volume flow is directed to the loaded bearing side and is throttled or shut off on the unloaded bearing side. Facility ( 1 ) according to claim 1, characterized in that the control ring ( 7 ) a sealing ridge ( 11 ) for engagement with the groove ( 6 ) having. Facility ( 1 ) according to claim 2, characterized in that the control ring ( 7 ) rotatably on the shaft ( 3 ) is arranged. Facility ( 1 ) according to claim 2, characterized in that the control ring ( 7 ) displaceable in the axial direction on the shaft ( 3 ) is arranged. Facility ( 1 ) according to claim 4, characterized in that the control ring ( 7 ) is designed as a slotted piston ring. Facility ( 1 ) for the distribution of lubricants tel in a thrust bearing ( 2 ), which axial forces of a rotating shaft ( 3 ) against a fixed wall ( 5 ) and with a channel ( 4 ) for supplying lubricant to the thrust bearing ( 2 ), characterized in that the thrust bearing ( 2 ) rotatably on the shaft ( 3 ), wherein the thrust bearing ( 2 ) a trapezoidal groove ( 6 ), and a control ring ( 7 ) fixed to the wall ( 5 ), the control ring ( 7 ) for lubricant distribution in the trapezoidal groove ( 6 ) of the thrust bearing ( 2 ) engages in such a way that a lubricant volume flow is directed to the loaded bearing side and is throttled or shut off on the unloaded bearing side.