CS238728B1 - Sliding radial bearing - Google Patents

Abstract

The purpose is to enable the stiffness of the bearing to be changed in a simple manner. This is achieved by dividing the bearing in a direction perpendicular to the axis of rotation into at least two sub-parts, which are provided with dividing planes passing through the axis of rotation. The dividing planes of the sub-parts are offset from each other by an angle a, which is equal to the ratio of 180° to the number of dividing planes. Each half of the shell is seated on the stones via the adjusting elements.

Description

(54) Plain journal bearing

The purpose is to be able to change the bearing stiffness in a simple manner. This is achieved in that the bearing in a direction perpendicular to the axis of rotation is divided into at least two parts which are provided with dividing planes passing through the axis of rotation. The parting planes of the sub-parts are inclined to each other by an angle α equal to a fraction of 180 ° to the number of parting planes. Each half of the pan is seated on the stones over the adjusting elements.

Giant. 1

The invention relates to a sliding radial bearing in which the possibility of adjusting the stiffness change in two or more directions, independently in each direction, is addressed.

In the construction of rotary machines, turbines, turbocompressors, centrifugal pumps and the like, radial plain bearings are used to support the shafts of these machines. The manner of bearing of the shaft journals in these bearings decides not only on the actual function of the bearing, but also on the dynamic characteristics of the rotors and thus of the whole machines. Radial clearance in a bearing is a major factor affecting the function of radial bearings. Known radial bearing solutions are, for example, bearings with a circular bearing, bearings with the so-called lemon play, more flat bearings, bearings with separate bearing segments. The choice of bearing type is determined by the bearing requirements of the rotors and, last but not least, the possibilities of adaptation of the bearing clearance to the specific operating conditions and modifications necessary due to changes in the size of the rotor journal. In large machines, it is not conceivable that, for example, due to a failure to observe the exact dimension of the rotor journal due to a technological error or damage to the journal surface during operation, the problem can be solved by a new rotor. Need to adjust! corresponding bearing. Known design solutions of bearings with circular shells, with shells with lemon clearance allow relatively easy operations to ensure clearance adjustments in the bearing. The development of sliding surfaces of a multi-faced bearing requires very demanding technology and it is practically impossible to retrofit the bearing clearance. Due to their dynamic properties, in particular the directional stiffness of the shaft bearings, multi-surface bearings are a much needed component. Their widespread use in many cases is precluded by the aforementioned demanding production technology and the impossibility of adjusting the bearing clearance.

These drawbacks are overcome by a sliding radial bearing according to the invention, in which the dividing planes of the sub-parts are inclined to each other by an angle equal to 180 ° to the number of dividing planes, each half of the ladle being seated over the adjusting elements on the stones.

This axial distribution of the bearing and the relative rotation of the separation planes offer significant advantages.

In a simple way, it realizes changes in play and therefore stiffness of each bearing part directly in the direction in which the respective bearing part is adjusted. The setting direction can be changed at any time by simple means. In the design, it is also possible to respect the expected magnitude of the forces acting in each direction by selecting the axial width of the bearing parts. Because of these properties, the plain bearing according to the invention is particularly suitable for prototype and developmental devices.

The accompanying drawings show an exemplary embodiment of a sliding radial bearing axially divided into two parts according to the invention, in which Fig. 1 is a sectional view of the bearing, Fig. 2 is a view of one part of the bearing and Fig. 3 is a view of the other part. bearings.

An exemplary sliding radial bearing is designed such that the bearing is divided into two parts in a direction perpendicular to the axis of rotation of the pin 2. The first part is divided by the first parting plane 6 horizontally into the first half of the shell X and the second half of the shell 2. The parting planes,, části of the bearing part are perpendicular to each other. The clearance with respect to the pin X in the vertical direction is determined by means of washers 8, X under the stones 10 χχ and the corresponding adjustment of the first dividing plane 6 between the first half of the ladle X and the second half of the ladle. This is accomplished by means of washers 12, XX under the stones 14, 15 and by adjusting the second separation plane 6 between the first half of the ladle 6 and the second half of the ladle 6 of the second bearing part.

Claims (1)

SUBJECT OF THE INVENTION Sliding radial bearing divided in a direction perpendicular to the axis of rotation of the Sepu by at least two parts, which are provided with dividing planes passing through the axis of rotation, characterized in that the dividing planes (3), (6) of the partial parts are inclined relative to each other equal to 180 ° to the number of divider planes (3, 6), each half of the ladle (1), (2), (4), (5) being seated over the adjusting elements (8), (9), ( 12), (13) on stones (10), (11), (14), (15)