DE1575585A1 - Roller and needle bearings - Google Patents

Description

Dr. Expl.]

Punpep- und Maschinenfabrik Lsderle QHG. > Freiburg file p Rollers * and needle roller bearings

The invention relates to a roller or needle bearing with a inner and outer race, as well as a number axially parallel running, over the interior bsw. Circumference of the run » rings of distributed roles or »needles, in which each hell respectively". The needle is only in contact with the raceway surfaces over an iron part of its axial length.

In known ball or needle bearings, it is already known to have the inner or outer race with a weak double conical profile to allow a slight mutual axial pivoting of the inner and outer race, as for certain applications, for example with relatively long and elastic crankshafts.

It is also the case with bearing rollers or bearing needles to avoid increases in tension on the frontal peripheral edges known to grind these slightly convex. Through this measure it is achieved that - premature outbreaks on the forehead

_ΡΑηηα , _Λ 909886/0 7.6 k

BAD ORfQfIVAL

area · “OBOh POSSIBILITY ve” ο be avoided.

Dl * known rollers or needle bearings have the pecking part on »the β be la operation under strongly changing temperatures, In particular «a» B. in pumps, not at all operating temperatures an optimally low storage therapy1 is ensured can be. Di · Change of the storage pie Is as a function of the Temperature not only depends on a different one Change in durometer of the inrrea and outer race old consequence of their different diameters, but rather also ddt the type of material on which the inner Bearing ring pushed on or in which the ijueeers bearing ring inserted 1st »On the other hand, it would be in the interest The longest possible stagnation time for roller or needle bearings is desirable, at all operating temperatures that occur a <ptimal low bearing clearance aufreohtsuerhaltezio The same applies to the rotating parts of pumps, SoB · for sealing on the walls of the pump housing Displacer Orguner

Her purpose of the present invention is to provide a Bollen- or needle bearing, in which is constant as far as possible independent of prevailing operating temperatures an optimally low I * gerspiel aufrecJi: - obtain leaves "This is achieved essentially by the fact

BAD ORIGINAL 909886/0764

Each roller or needle has a bearing surface at both end joints, with the other raceway surface however, only in a central area in contact is located, and that the width of the mean · «η is non-contacting Ring curse de »one Lsufring curse larger than that The width of the ring-shaped contact surface of the other running surface is

gemaeeen JEyigextj wlirä achieved, duss eioh with too strong, fl fjip »rBtitr- and / or er

dna intiBwn and

Race, the axes of the rollers or Hadolu in the DurchmesGerebene of the two races "depending on Ausführtmüsforn of the races either inward or outward easily bulge bsw _t reveruibel deform can _o ¥ / c." Voungsebene the rollers "bzwo needle axis remains including rolling of the rollers or needles in that diameter plane of the races which runs through the two end face centers of the roller or needle in question

Layers designed according to the invention can be used in particular for Yunpen, which are intended for conveying media with strongly changing temperatures and in which the conveyed media are simultaneously used for bearing lubrication _{or the like}

The invention is explained in more detail below with reference to the drawing explained E3 shows:

909886/0764

1 to 4 different exemplary embodiments according to the invention Hol lea- or needle bearings, each in an axial half-section,

5 shows an exemplary embodiment of a positive displacement pump

with built-in rollers according to the invention »

store in partially cut representation »

t Tel lone g-_y
Fig. 6 is a cut length of the line VI-VI of Pig "5"

1 shows an embodiment of a ball bearing according to the invention with an inner race 1 and an outer race 2o. Rollers 3 are distributed over the inner or outer circumference of the races 1, only one of which is illustrated. Each roller 3 has an annular contact surface 4 with the inner race and with the outer race 2 annular contact surfaces 5'5 *, which are separated from one another by a middle, non-contact annular surface 6. The contact-free annular surface 6 is here formed by a flat annular groove. The raceway surface of the outer race ring 2 is closed at both ends by inner ring flanges 7, 7 *, against which the end faces of the rollers 3 rest. The raceway surface of the inner raceway 1, which has the central, coherent contact area A , has a conical, downward-shaped profile at both ends.

4ra Lafjar »afc

909888/0764

BATH ORIGINAL

that the width of the middle, non-contact ring hole 6 of the outer race 2 is greater than the width of the ring-shaped contact surface 4 can bulge out »if in a certain temperature range the ring opalt between the inner and outer race ring becomes too narrow without the pressures acting on the rollers 3 reaching too high a level» The dimensions of the races 1, 2 and the rollers 5 are designed in this way that at the maximum radial distance of the outer from the inner race at a certain temperature, the axes of the rollers 3 run undeformed in a straight line, with an optimally low bearing clearance compared to the races 1, £ between the inner and outer race or »2 is less, finlet a more or less ger etakre reversible deformation of the roller axles takes place, with an optimally small play or * a

clearance-free storage is achieved *

-j Because of the special training of the inner

* · * Laufrin ^ es i te. With the Pig * i bearing, it can be achieved that the axis of the inner race i is opposite

the outer race 2 is slightly pivotable « Because of the deformation possible according to the invention the axes of the bulbs 5 can, however, be the esacinal possible pivoting angle of the bearing ring lugs in the case of the Bearings according to Figo 1 compared to corresponding known bearings still significantly increase »

In the embodiment of a bearing according to the invention according to FIG. 2, there is a central annular contact surface on the running surface of an outer bearing ring 2a . provided, wherein an inner race 1a alt the ends of the rollers 3 has co-operating annular contact surfaces 5 * »3a *, which are separated from one another by a central non-contact annular surface 6af

The embodiment bearings according to the invention according to FIG. 3 and 4 correspond essentially to that according to FIG. 2 or α FIG. 1 with regard to the design of the trains turned the running surfaces of the lurking rings »at the camp 2 corresponding embodiment of an inventive Bearing according to Figo 3, however, are the profile of a aussereη race 2b on its outer surface and that an inner Laofringea 1b radially on its inner surface with respect to the respective annular contact areas the rollers 3 weakened by circumferential grooves β or «9 * 9 '. At the Pig camp. 1 similar embodiment of a

909886/0764 BATH ORIGINAL

erflndungsgeoüesen lagere of FIG _n 4 are "* provided 1c is a" groove 10 and at the outer ~ surface of an outer Legerringa 2c grooves 11, 1 1 '' on the one interior bearing ring Duron such Msssnahme can be calibrated to achieve that AUOH the Leger ring · themselves, and not just the rollers 3 alone, have a certain possibility of deformation in order to always maintain an optimally low bearing clearance. In addition to the advantages already mentioned, the ball bearings or needle bearings according to the invention can also be produced relatively easily.

The displacement pump shown in FIGS. 5 and 6 has two mutually cheese-making displacement organs 12, 13. 1 provided, in which the displacement organs 12, 13 separate bearing journals 1 $, 17 are added. Positive displacement pumps of the sloped type are not infrequently used for pumping hot media or media with strongly fluctuating temperatures, whereby the required media also serves for bearing lubrication or influences the temperature of the layer lubricant. The direct lubrication of the pump bearings 14, 14 * can take place, for example, by a branched off partial flow of the conveying medium. In the case of another training, a "special lubricant *" - "? For example, with the help of the delivery line on the pressure side, on an erülUe ά °?) imler- und Abiiehiruek

BAD ORIGINAL 909886/0764

be brought, where «int temperature increase de · peeler ·» and loosening agents often cannot be prevented easily, or even not wanted "

In these cases, Bali camps can vary greatly Te apera doors subject to constant maintenance “Ines ojptlaal low bearing clearance, especially with the roller bearings, is particularly important for their service life is · But also for sealing the rotating Vexv » pusher organs 12, 15, a small bearing clearance is advantageous.

The inventions show the advantages already mentioned Roller or needle bearings still have the advantage that the annular grooves forming the contact-free annular surface 6 and possibly also the touching area attached to the susamoen 4 subsequent bevels 41 a good one Facilitate the supply of cutting material. This is especially true for Puapen, in which the bearings with liquid lubricants to be charged bsw. where viscous yördereedien at the same time form the bearing lubricant

BATH ORIGINAL

909 * 86/0764

Claims (1)

jratentana sayings 1. Roller or needle roller bearings with an inner »and an outer race ring as well as a number of axially parallel running» over the inner «· bgp» Auseenmofong the running rings distributed roles in the » Rade In, in which every Holle bsw«. Ha dal si oh is in contact with the raceway surfaces only over part of its axial length, characterized by (bevel each roller (3) or needle with a Running ring * lush · on both finder cuts, * it the other ^ da «tt yeiyetatear On the other hand, the raceway surface is only in a middle area is in contact, and daee the width of the in the middle of the non-free entry surface (6) of the one raceway surface larger than the width of the annular contact surfaces <4) the other tread lato 2 «bearing according to claim t, characterized in that at least the lower, contact-free singing surface (6) a ^ ufrlogflafihe iat formed by a flat annular groove Jo bearing according to one of claims 1 to 2, characterized in that the outer raceway surface at both ends is completed by inner ring flange (7, 7 *), against which the end faces of the rollers (3) b & w. »Ennobling concerns« BAD ORIG | _NAL 909886/0764 4. bed * according to one of claims 1 to 3 »characterized in that the middle« contact area (4) »is suspended trained «and the corresponding truing area en bothq. Ends (41) in front of the bottom have a conical shape having removed spimitt profile. 5 "I" ager according to claim 1 or one of the following, thereby. Identified that by means of 3 contact areas (4) are formed α 6ο layer according to one of claims 1 to 5 »characterized in that that the profile of the outer race (2) on its outer surface and that of the inner race (1) on its inner surface radially opposite the respective ring-shaped Contact areas (4, 5) with the rollers (3) bsw. Hade In is weakened by hats (8-11) all around " 7ο application of Lagernx & oh one of claims 1 to 6, for the demands of hot media or such particular with changing temperatures pumps (FIG · 5 and 6) _t in which the supported media BSN simultaneously serve sur bearing lubrication "affect this" 8o application of bearings according to one of claims 1 to 909886/0764 BATHROOM Ί57558 for Äur # §ρα «2? $ ο $ von söbfluneigen Medi er: certain äeaen ävs FörderaotuiQ or a "twae" iWXOa3igec Sehaier · uaa / odcr suggest is carried out. 909116/076 ^