SU838128A1 - Sliding-contact bearing assembly - Google Patents

Description

The invention relates to mechanical engineering and can also be used in the structures of sliding bearing assemblies, which are lubricated from an oil bath, for example, in bearings of hydrogenerators. A bearing bearing assembly is known, comprising self-aligning segments mounted on the housing on centrally arranged supports and pressure plates mounted on the supporting surfaces of the segments mirrored to the supports in the radial plane of each segment and partially located outside the contour of the segments. In the course of operation of this unit, the pressure plates perceive the kinetic pressure of lubrication oil, due to the rotation of the moving element (pin or shaft) immersed in oil, oil shaped. The energy of the pressure on the plates is converted into torque relative to the pivot point of the segments ij. However, the assembly has a limited ability to withstand loadings at elevated loads, since the pressure plates are located in the area of reduced oil kinetic head. The purpose of the invention is to increase the bearing capacity and reliability of the slide bearing unit. The goal is achieved by the fact that the sliding bearing assembly, which contains self-aligning segments on centrally arranged supports, and pressure plates, which are mirrored relative to the supports in the radial plane of symmetry of each segment, are equipped with crankshafts mounted on bearings in the housing, each of which is located under the support of segment B pressure plates, and X1 each segment is rigidly fixed on its lateral surfaces on both sides of the support in its radial PLOSCOTI symmetry p fungus lug covering shaft knee, the pressure plates are arranged with a gap relative to the segment and is rigidly secured to the crankshaft. Fig. 1 shows a sliding bearing segment from the end radially; FIG. 2 is the same, top view of FIG. 3 — section A-A in FIG. 1; figure 4 - section bB in fig.Z; on fig.Z - section bb In fig.Z.

The sliding bearing assembly contains self-aligning segments 1 placed in an oil bath (not shown) on elastic plates 2 supported on centrally located supports 3. Pressure plates 4 and 5 are rigidly fixed on the crankshaft, shaft b, which is installed radially under support 3 of each segment 1. The crankshaft b rests on the 7th and 8th rolling bearings. At the same time, the elbows 9 and 10 of the shaft b are placed in the plane of the pressure plates 4 and 5, and facing the supporting surfaces of the segments 1. In addition, the elbows 9 and 10 of the shaft 6 enter the lugs 11 and 12 of the levers 13 and 14, which are fixed to the side surfaces of the support plates 2 on either side of the support 3 in the radial Plane of symmetry of the segment 1. The segment 1 is supported by the movable element 15, the whole structure is mounted on the housing 16.

In the steady state operation of the node in the maslovanne a steady flow of oil is formed, conditioned; rotation of the rolling element 15, immersed in oil. At the same time, the tangential component of the velocity V of the oil flow is of considerable magnitude and is directed towards the movement of the movable element 15.

The kinematic energy of the flow of oil incident on the flaps 4 and 5 is converted into pressure energy, as a result of which the flaps 4 and 5 are affected by the total hydraulic force F, which on the arm L generates a torque relative to the axis of the crankshaft b.

Under the action of the kinetic head (moment), the pressure plates 4 and 5 tilt in the direction of rotation of the moving element 15, and since they are rigidly connected to the crankshaft b, it turns in bearings 7 and 8 in the same direction. As a result of this, the elbows 9 and 10 of the shaft b, by selecting a gap in the lugs 11 and 12 of the levers 13 and 14 (Figs 3-5), turn the indicated levers at a certain angle I of Figs 5). Since the levers 13 and 14 are rigidly connected to the plate 2 on which segment 1 is mounted, the entire system rotates at a certain angle.

 In the wedge gap formed between segment 1 and the moving element 15, hydrodynamic pressures P are generated, which balance the load PO acting on the segment. In this case, the load vector P on segment 1 is displaced from the axis of the support 3 in the direction of rotation of the movable element 15 by a certain amount. The displacement of the vector P will take place until the moment from the hydrodynamic pressure forces in the wedge gap is balanced by the moment from the hydraulic pressure the oil flow on the plates 4 and 5, i.e.

(one).

V is 0. SY,

de S. 1

(2)

or P,. Y, (3)

 i, y

(four)

from where the offset RO 1

where F ..;, Rd hydraulic force on

pressure plates 4 and 5; L is the distance from the point of application of the force FfA on the plates to the axis of the crankshaft; I is the distance from the axis of the crankshaft b to the axis of the knee 9 or 10;

S is the force at the point of contact of the surface of the knee 9 or 10. and levers 13 or 14;

Y is the distance of the point of contact.

. knee 9 (10) and lever 13 to the point of self-installation of segments 1;

Р - hydrodynamic pressure - o Force on segment 1 (load);

 - the amount of displacement of the vector PO from the point of self-installation of segment 1

The more moment is transferred relative to the point of self-installation of the plate 2 (moment SY), the greater the load PO can carry a segment in the formula. (one) ,

The displacement in the formula (4) is equivalent to the eccentricity in eccentrically supported segments.

Analyzing formula (4), it can be concluded that by varying the parameters L, 1 and Y, it is possible to increase the transmitted torque by several times from pressure plates 4 and 5 to segment 1, which will make it possible to obtain an offset and, accordingly, the angular position of the segment 1 as well as with eccentric support segments in a one-way bearing.

The operation of the bearing in the reverse of the movable element 15 is similar to that described.

Claims (1)

1. USSR author's certificate No. 631703, class, F 16 C 17/06, 1977. .j FIG. 15 FIG.