SU1386767A1 - Sliding-contact bearing segment - Google Patents

Abstract

The invention relates to the field of mechanical engineering and can be applied to the structures of axial and radial bearing assemblies of hydraulic units, pumps, etc. The goal is an increase in the load capacity of the segment. The segment contains a through-cut made from its back side, extending in the tangential direction from the input edge to the output one. The design provides a uniform seal along the length of the segment along the ends, reducing the consumption of lubricant. 7 il.

Description

oo

00Oi

|

O5

eleven

The invention relates to mechanical engineering and can be applied in the structures of axial and radial units under hydraulic units, pumps, steam and gas turbines and other machines.

The aim of the invention is to increase the load capacity of the segment.

FIG. Figure 1 shows the segment of the resistant; 1D glide, Top view; in fig. 2 - segment radial

foot sliding bearing, reconciliation type; in fig. 3 - section aa in figure 1 and 2; in fig. 4 is a section BB in FIG. 2; in fig. 5 is a view In figure 1 And 2; in fig. 6 is a view of FIG. 1 and 2; and FIG. 7 - working segment, tangential section along the middle radius (for example, in relation to the segment of the resistant slip slip).

The sliding bearing segment (Figs. 1-7) comprises a massive body 1, on which a relatively thin plate 2 with an anti-friction coating is placed. A recess 3 is made at the back of the plate 2, expanding in the tangential direction from the entrance to the exit edge of the segment.

 In addition, the following designations are given: h, and h7 of the thickness of the lubricant layers between the peripheral edges of the plate 2 and the movable element (fifth shaft) 4, respectively, at the inlet and outlet cuts of the segment; R and the radii at which plate 2 unfolds under the action of hydrodynamic pressures at the inlet and outlet cuts of the segment, respectively; l and uj - movement of the peripheral edges of the plate 2 in the direction to the plane of the friction of the rolling element 4 under the action of hydrodynamic pressures, respectively, at the inlet and outlet sections of the segment; Р - distribution of hydrodynamic pressures in the tangential plane of the segment during its operation; The arrow on the movable element 4 (Fig. 7) indicates the direction of its movement.

The sliding bearing segment operates as follows.

During the rotation of the movable element 4 in the wedge gap (Fig. 7), hydrodynamic pressures are formed over the entire area of the segment. Under the action of these pressures at

five

0

five

0

five

0

five

0

five

The slots of the recess 3, the plate 2 is deformed (deflected) and placed on the body f in its middle part along the entire length of the segment. Since the recess 3 is made expanding in the tangential direction, it forms two supporting ribs along the periphery of the segment, tapering in the direction of movement of the shaft or point 4 (Figs. 1, 2, 5 and 6). Due to the elastic deformation of the plate 2 under the action of the pressures P, the stresses in it are transferred to the periphery. As a result, the outer edges of the plate 2 unfold and lift to the side of the friction plane of the movable element 4 on the inner edges of the peripheral support edges of the plate 2 (Figs. 5 and 6). The turning radii of the plate 2 in this case are R at the input slice of the segment and H on the output slice. Since the width of the supporting edges of the plate 2 (Fig. 1 and 2) is variable in the tangential direction, then the turning radius of the plate 2 will be variable depending on the tangential coordinate. As a result of the deformation of the plate 2, its peripheral edges rise at the input slice of the segment by an amount h, the output edge rises at the same time, as (Figs. 5 and 6).

Thus, the movements of the peripheral edges towards the friction plane of the movable element 4 will be variable along the length of the segment. Since the segment has a slope with respect to the friction surface of the moving element, the thickness of the lubricant layer in the wedge gap of the segment is variable and decreases from input to output. Due to the fact that the peripheral edges of the segment move to the plane of the movable element due to the variability of the turning radii of the supporting ribs are variable and decrease as the thickness of the lubricant layer in the wedge gap from inlet to outlet, conditions are created for a uniform lengthwise sealing segment along the ends.

In view of this, the end costs of lubrication from the wedge clearance are reduced and its carrying capacity increases.

Claims (1)

Invention Formula Sliding bearing segment containing one hundred d, 7/1 but on 2 Ron groove, characterized in that, in order to increase the load capacity, the groove is made through and expanding in a tangential direction from the input edge to the output edge. -T Fig.Z b Phage.2 Fi2.CH Ph.5 Fi g6 Fiá.1