DE1675743C - Horizontally split plain bearings consist of two bearing shells offset from one another - Google Patents

Description

I 675

The invention relates to a horizontally split plain bearing, consisting of two bearing shells that are horizontally offset from one another and have the same bore radii.

With the well-known oval or lemon flake bearings β the distance between the cylindrical bearing journal and the sliding surface moves in the bearing play of the bearing in the circumferential direction continuously between maximum and minimum values, provided that the pin lies concentrically in the bearing. ">

From G. Niemann, "Maschinenelemente", Vol. 1, Springer-Verlag, 1950, p. 248, Fig. 15 / 14c, is a Known plain bearings in which the running surface of the two-part bearing shell is drilled eccentrically to the outer surface. The bearing shells are turned upside down built in, so that two wedge surfaces are formed between the pin and the bearing, as is the case with the oval bearing.

The smallest diameter in the bearing clearance in such bearing types that have become known to this day is in the same direction as the main load, or it is ao at right angles to it, or it can turn out of the level of the main load- The ff belspleId WjF I

ijuo g ^ ne J

with same

points in the same ^^ JS.

PunktJV «Jffgf lUnder the bearing shell £ knife * of the bearing are, υ <uw> and G he

and Jf. are ^^^ SSiSSSSS ^ ySi standing housing »U qrlindriec £« ^ ™ ** ^e 'j set. The center point N of the Jjjgjögrung flUU together with the housing point. The smallest diameter «of the bearing is around the angle Mn

Direction of rotation of the Ζ * Ρ £ ™ ^Ζ ™ »^ ^ST _d ™ ^e ™. ^The main load P is turned outwards, by the same amount the largest J-ager diameter in the direction of rotation of the pin is turned out of the spacing plane T of the bearing shell xH , and H. The smallest dresser a ^ s ^ cuts the bearing shells / J ₁ and H,, in their ^ large.

It is also known, an elliptically designed bearings made of cylinder-like bearing shells up a ₅ assemble, wherein the axis of ElHpse is inclined against the direction of rotation of the bearing pin (2 USA. Patent 901297)

Also is a cylindrical one made up of two halves Known slide bearings in which the upper slide bearing half is designed to be movable. This moving Part becomes cross-flowing due to the pressure of the oil film that builds up as the shaft rotates shifted so that a wedge gap extending over one bearing half is formed in each case (U.S. Patent 2,093,521).

The invention is now based on the object of a more reliable, higher run in plain bearings To achieve loads and lower operating temperatures.

This object is achieved according to the invention in that the two center points of the bore radii are equidistant on both sides of the dividing plane in a radial plane which is rotated out of the plane of the main load by an angle y of 10 to 30 ° in the direction of rotation of the pin.

In terms of size, the angles γ are advantageously to be used proportionally to the speed. With high bearing loads, smaller angles γ are more favorable, see above

Compared to the known plain bearing forms, the plain bearing according to the invention has a maximum achievable guidance accuracy. Another advantage results from the fact that the shape of the plain bearing causes a complete suppression of the vibrations of the journal in the bearing. To this In this way, reliable operation, higher loads and lower operating temperatures are made possible.

takes. U indicates the direction of rotation of the pin Z, the radius of which is denoted by r »i ·

In the bearing designed according to the invention, the position of the narrowest bearing play S _{mln is} predetermined at the most favorable location. The pin is guided very closely in the bearing and can therefore only perform much smaller movements than with the known slide bearings. The Keiuormige lubrication gap shape can be varied within wide limits by the choice of the radius of curvature of the bearing surface in relation to the journal radius r and can thus be adapted to the most favorable lubrication conditions of the bearing according to load and speed. On the basis of tests with the bearings according to the invention it was found that the operating behavior was most favorable when the ratio

R - r

within the limits of 0.8 · 10- «to 6 · ΙΟ" = », - preferably from 10- »to 2.5 · IU.

Claims (1)

Claim: Horizontally split bearings comprising two horizontally staggered bearing shells having the same bore radii, characterized in that the two Mittelpu ^{Impregnated (M)} g ^| are ^calibrated distance on either side of the parting plane (T) in a radial plane (in the direction of rotation of the pin Z ) is rotated out of the plane of the main load by an angle (γ) of 10 to 30 °.