Bearing assembly including rolling elements
AssigneeMoteurs Leroy-Somer
InventorJean Begue
Life of this patent
Estimating the term…
Abstract
The present invention relates to an assembly comprising: a cage, rolling elements placed inside the cage, a shaft passing through said cage and supported by the rolling elements, the cage having sealing parts extending on either side of the rolling elements, the two spaces formed between said sealing parts and the shaft, at least one communication path between the two spaces.
Claims30
1/ An assembly comprising:
- a cage,
- rolling elements placed inside the cage,
- a shaft passing through said cage and supported by the rolling elements, the cage having sealing parts extending on either side of said rolling elements,
- the two spaces formed between said sealing parts and the shaft,
- at least one communication path between the two spaces.
2/ An assembly according to claim 1, wherein said spaces are defined by annular grooves in the sealing parts.
3/ An assembly according to claim 1, wherein the sealing parts do not make contact with the shaft.
4/ An assembly according to claim 1, wherein the sealing parts include fluting.
5/ An assembly according to claim 1, including portions in relief on either side of each said spaces.
6/ An assembly according to claim 5, including fluting on either side of each of said spaces.
7/ An assembly according to claim 1, wherein said cage has wall and wherein said at least one communication path comprises channels made inside the walls of the cage.
8/ An assembly according to claim 1, wherein the cage comprises at least two half-shells disposed respectively on either side of said rolling elements.
9/ An assembly according to claim 8, wherein each half-shell is made integrally with a sealing part.
10/ An assembly according to claim 9, wherein each half-shell is made integrally with a sealing part by casting.
11/ An assembly according to claim 8, wherein the communication path comprises at least one inner channel made in at least one of the half-shells.
12/ An assembly according to claim 8, wherein the cage includes an intermediate piece between the two halfshells.
13/ An assembly according to claim 12, wherein the communication path comprises at least one channel made in the intermediate piece.
14/ An assembly according to claim 13, wherein the communication path comprises at least four channels made in the intermediate piece.
15/ An element according to claim 12, wherein said intermediate piece includes at least one channel enabling lubricant to circulate between two regions of the cage situated on either side of the rolling elements.
16/ An assembly according to claim 15, wherein said at least one channel extends along an inclined axis at a non-zero angle relative to the axis of the shaft.
17/ An assembly according to claim 12, wherein the intermediate piece is arranged to be fixed to the endplates of an electric machine casing.
18/ An assembly according to claim 1, wherein at least one of the sealing parts includes a lubricant recovery groove, said groove being disposed between sets of fluting opening out to the shaft and communicating via at least one channel with the inside of the cage.
19/ An assembly according to claim 1, wherein at least one of the sealing parts has helical fluting.
20/ An assembly according to claim 1, wherein the rolling elements comprise balls.
21/ An assembly according to claim 20, including two rings between which the rolling elements roll, one of the rings being in contact with the shaft, and the other ring being in contact with the cage.
22/ An assembly according to claim 1, the assembly being adapted to receive a member for spraying lubricant inside the cage.
23/ An assembly according to claim 1, wherein the diameter of the shaft level with the rolling elements is greater than or equal to 50 mm.
24/ An assembly according to claim 23, wherein the diameter of the shaft level with the rolling elements is greater than or equal to 100 mm.
25/ An assembly according to claim 1, wherein the cage has a low point with a lubricant emptying orifice.
26/ An assembly according to claim 1, wherein in operation the cage is filled at least in part by an oil.
27/ A rotary machine, including at least one assembly according to claim 1.
28/ A machine according to claim 27, including a casing and a fan inside the casing.
29/ A machine according to claim 28, wherein the fan is rotated by the shaft of the machine.
30/ A machine according to claim 28, including at least one duct opening out both into said at least one communication path and into an inside of the casing of the machine, at an outlet of the fan.