Bearings – Rotary bearing – Antifriction bearing
Patent
1992-08-20
1993-11-16
Footland, Lenard A.
Bearings
Rotary bearing
Antifriction bearing
384467, 384474, F16C 3366, F16C 3700
Patent
active
052617513
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention relates to a device for removing oil from annular spaces along side an anti-friction bearing wherein the stationary part around the bearing race discharges oil.
Antifriction bearings are lubricated, inter alia, with oil. It is frequently necessary to use this oil at the same time as means to remove heat from the bearing. For this, circulation of the lubricant is necessary. In many cases, oil is therefore fed and discharged through channels. Since oil discharge holes are normally arranged perpendicular to the rotating shaft, the oil can generally not pass out of the bearing space immediately. Accordingly, particularly in the case of high speeds of rotation, a large amount of milling work takes place in the bearing, whereby heat is additionally produced. It must, therefore, be seen to it that the oil introduced is removed over the shortest possible path. From EP Unexamined Application for Patent 232 978, a device is known in which the oil is removed through oil discharge openings which are connected tangentially to the annular spaces of the bearing. Such tangential holes are, however, difficult to produce in many cases. In particular, however, existing bearing housings having vertically arranged holes cannot be readily equipped with this device.
SUMMARY OF THE INVENTION
One object of the present invention is therefore to provide a device by means of which these disadvantages are avoided and with, which an easily produced and installable mean for removal of the oil, which means is compact but nevertheless highly effective, is obtained.
If an oil guide plate is arranged alongside of the anti-friction bearing in the annular space radially inside each oil discharge hole, the oil which is entrained by the moving parts and accumulates in this annular space is picked up by said plate and conveyed into the hole. If this oil guide plate is produced as a separate part, the construction is simple. The oil guide plate in that case is of a funnel-like construction and can be applied to a ring which is arranged alongside the bearing and at the same time serves as spacer ring. A ringless embodiment is also possible in which merely a funnel-like structure having a length of tube welded, for instance, thereon is used. In this case, the length of tube is inserted into the hole. In these embodiments it is hydrodynamically favorable for the baffle plate to be curved or directed obliquely to the entrance of the hole.
These embodiments furthermore have the advantage that, in different cases of use with a different quantity of oil, baffle plates having different heights which are adapted thereto can be used.
The device described can be used with the same advantages both in an embodiment with rotating shaft in which the oil baffle plate is fastened to the housing and in an embodiment with rotating housing in which the oil baffle plate is arranged on the shaft.
From Federal Republic of Germany Provisional Patent AS 22 09 345, a skimming member is known by means of which oil is also accumulated and conveyed further, but in that case, the skimming member rotates, which is more expensive. In the solution in accordance with the present invention, the skimming member is stationary. In this case, the kinetics of the circulating oil is used in order to remove the oil.
The invention will be described in further detail with reference to four figures.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a longitudinal section through an antifriction bearing having the device in accordance with the invention;
FIG. 2 is a view along the line A--A of FIG. 1;
FIG. 3 shows the partial cross section B--B of FIG. 1;
FIG. 4 shows a variant of FIG. 3.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
In the antifriction bearing of FIG. 1, a ball bearing 2, which rests in the stationary housing 3' is arranged on the rotating shaft 1. Within an annular space 3' of the housing 3 alongside the bearing 2, there is provided an easily produced spacer ring 4 which not only fixes the axial position of the bearing 2 but
REFERENCES:
patent: 2919962 (1960-01-01), Hencken et al.
patent: 4385788 (1983-05-01), Brown et al.
patent: 4596476 (1986-06-01), Schill et al.
patent: 4884903 (1989-12-01), Pham et al.
FAG Kugelfischer Georg Schafer (KGaA)
Footland Lenard A.
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