Search

KR-102962857-B1 - Thrust bearing

KR102962857B1KR 102962857 B1KR102962857 B1KR 102962857B1KR-102962857-B1

Abstract

A thrust bearing is provided. The thrust bearing comprises: a bearing base mounted in a ring-coupled form on the outer diameter surface of a rotating shaft; a pad portion formed by a plurality of bearing pads arranged with a gap between them in the circumferential direction of the bearing base, wherein the bearing pads are arranged on the bearing base and have a bearing surface facing a thrust disk provided radially outward of the rotating shaft, and the bearing pads support the thrust disk in the axial direction through the bearing surface; and an elastic support portion provided between the bearing base and the bearing pad to elastically support the bearing pad, wherein the elastic support portion includes a first elastic body and a second elastic body that are symmetrically arranged between the bearing base and the bearing pad, and the first elastic body and the second elastic body are bent at least twice in the longitudinal direction, wherein the upper ends in the longitudinal direction of the first elastic body and the second elastic body meet each other at the lower surface of the bearing pad to form a structure in which they make line contact with the lower surface of the bearing pad, and the lower ends in the longitudinal direction of the first elastic body and the second elastic body move away from each other and are seated on the upper surface of the bearing base.

Inventors

  • 류근
  • 백채연

Assignees

  • 한양대학교 에리카산학협력단

Dates

Publication Date
20260511
Application Date
20240126
Priority Date
20231228

Claims (12)

  1. A bearing base mounted in a ring-coupled form on the outer diameter surface of a rotating shaft; A pad portion formed by a plurality of bearing pads arranged with a gap between them in the circumferential direction of the bearing base, wherein the bearing pads are provided on the bearing base and have a bearing surface facing a thrust disk provided radially outward of the rotation axis, and the bearing pads support the thrust disk in the axial direction through the bearing surface; and An elastic support member provided between the bearing base and the bearing pad to elastically support the bearing pad; comprising, The above elastic support includes a first elastic body and a second elastic body that are symmetrical between the bearing base and the bearing pad, and The first elastic body and the second elastic body are bent at least twice in the longitudinal direction, The longitudinal upper ends of the first elastic body and the second elastic body meet each other at the lower surface of the bearing pad and form a structure that makes line contact with the lower surface of the bearing pad. The longitudinal lower ends of the first and second elastic bodies are arranged to be spaced apart from each other and seated on the upper surface of the bearing base, forming a structure. The first elastic body and the second elastic body are, respectively, A first inclined portion having one end in the longitudinal direction connected to the bearing pad and provided as an inclined surface; A first bending portion extending from the other end in the longitudinal direction of the first inclined portion and provided with a curved surface that bends toward the lower side of the first inclined portion; A second inclined section extending from one end of the length direction of the first bending section in a manner facing the lower surface of the first inclined section, and provided with an inclined surface having a shorter length than the first inclined section; A second bending portion extending from one end in the longitudinal direction of the second inclined portion and provided with a curved surface that bends toward the lower side of the second inclined portion; and A thrust bearing comprising a third inclined portion having one end in the longitudinal direction connected to the bearing base, wherein the inclined surface extending in a manner facing the lower surface of the second inclined portion at one end in the longitudinal direction of the second bending portion.
  2. delete
  3. In Article 1, A thrust bearing in which, among the first inclined portion, the second inclined portion and the third inclined portion, the thickness of the first inclined portion is the thinnest and the thickness of the third inclined portion is the thickest.
  4. In Article 1, A thrust bearing in which the distance between the first bending part and the third inclined part and the distance between the second bending part and the first inclined part are less than or equal to the distance between the second inclined part and the first inclined part and between the second inclined part and the third inclined part.
  5. In Article 1, The first inclined section and the second inclined section form an acute angle centered on the first bending section, and A thrust bearing in which the second inclined portion and the third inclined portion form an acute angle centered on the second bending portion.
  6. In Article 1, It further includes a bearing web, A thrust bearing, wherein the bearing web is provided between the bearing base and the pad portion, is positioned between the first elastic body and the second elastic body, is formed integrally with the bearing base, the pad portion and the elastic support portion, and has flexibility.
  7. In Article 6, The above bearing base is, A base body having a center that is open in the axial direction to allow insertion of the above-mentioned rotational shaft; and It includes a groove provided on the upper surface of the base body to correspond to the bearing web, and Including additional dampers, A thrust bearing, wherein the damper is installed in the groove and supports the bearing pad in the axial direction through the bearing web.
  8. In Article 1, Including additional working fluid supply lines, A thrust bearing, wherein the above-described working fluid supply line is supplied to the rear side of the bearing base and provides a path for the working fluid to pass through the bearing base, elastic support, and bearing pad in sequence and be discharged at high pressure toward the thrust disk.
  9. A bearing base mounted in a ring-coupled form on the outer diameter surface of a rotating shaft; A pad portion formed by a plurality of bearing pads arranged with a gap between them in the circumferential direction of the bearing base, wherein the bearing pads are provided on the bearing base and have a bearing surface facing a thrust disk provided radially outward of the rotation axis, and the bearing pads support the thrust disk in the axial direction through the bearing surface; and An elastic support member provided between the bearing base and the bearing pad to elastically support the bearing pad; comprising, The above elastic support includes a first elastic body and a second elastic body that are symmetrical between the bearing base and the bearing pad, and The first elastic body and the second elastic body are bent at least twice in the longitudinal direction, The longitudinal upper ends of the first elastic body and the second elastic body meet each other at the lower surface of the bearing pad and form a structure that makes line contact with the lower surface of the bearing pad. The longitudinal lower ends of the first and second elastic bodies are arranged to be positioned apart from each other and seated on the upper surface of the bearing base, forming a structure. Including additional working fluid supply lines, The above working fluid supply line is, A first supply line provided inside the bearing base; A second supply line connected to the first supply line and provided inside the elastic support member; and A thrust bearing comprising a third supply line connected to the second supply line and provided inside the bearing pad.
  10. In Article 9, The above first supply line is, A bearing groove formed circumferentially on the rear surface of the bearing base; and A thrust bearing comprising a base flow path portion that is connected to the bearing groove and paired to correspond to each of the elastic support portions, and includes a first flow path extending toward the first elastic body and a second flow path extending toward the second elastic body.
  11. In Article 10, The above second supply line is, A third fluid path connected to the first fluid path and formed inside the first elastic body in a shape corresponding to the first elastic body; and A thrust bearing comprising a fourth flow path connected to the second flow path and formed inside the second elastic body in a shape corresponding to the second elastic body.
  12. In Article 9, The above third supply line is, A fifth flow path connected to the second supply line and formed inside the bearing pad in a shape that crosses the inner and outer diameters of the bearing pad; A sixth fluid path connected to the fifth fluid path and extending in the plane direction of the bearing pad, forming a grid structure that is symmetrical to the left and right with respect to the fifth fluid path; and A thrust bearing connected to the above-mentioned sixth Euro and comprising a plurality of orifices formed from each corner of the grid structure toward the bearing surface of the bearing pad.

Description

Thrust bearing The present invention relates to a thrust bearing, and more specifically, to a thrust bearing having high load-bearing capacity and damping force under static and dynamic load conditions, and an active response capability to deformation and tilting of the thrust disc. Recently, high-performance, high-efficiency fluid bearing technology is receiving significant attention as the demand for ultra-high-speed rotating machinery capable of operating in extreme environments increases in industries related to energy, propulsion, and power. This is because bearings account for a very large proportion of the development and operation of high-speed and high-efficiency turbine, compressor, and pump systems. Meanwhile, externally pressurized fluid thrust bearings according to conventional technology have a single orifice in the bearing pocket and do not have a mechanism capable of imparting structural damping force to the bearing. In addition, externally pressurized fluid thrust bearings according to conventional technology have the disadvantage of being unable to actively respond to deformation and tilting of the thrust disc. FIG. 1 is a drawing showing a thrust bearing mounted on a rotating shaft according to one embodiment of the present invention. FIGS. 2 to 4 are drawings for explaining a thrust bearing according to an embodiment of the present invention. FIG. 5 is a drawing for explaining the elastic support portion of a thrust bearing according to one embodiment of the present invention. FIGS. 6 to 9 are drawings for illustrating the operating fluid supply line of a thrust bearing according to one embodiment of the present invention. FIG. 10 is a drawing for illustrating a first supply line of an operating fluid supply line in a thrust bearing according to one embodiment of the present invention. FIG. 11 is a drawing for illustrating the first supply line and the second supply line of the working fluid supply line in a thrust bearing according to one embodiment of the present invention. FIGS. 12 to 14 are drawings for explaining the second supply line and the third supply line of the working fluid supply line in a thrust bearing according to one embodiment of the present invention. FIG. 15 is a diagram illustrating the process of supplying an operating fluid to a bearing surface through an operating fluid supply line of a thrust bearing according to one embodiment of the present invention. Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. However, the technical concept of the present invention is not limited to the embodiments described herein and may be embodied in other forms. Rather, the embodiments introduced herein are provided to ensure that the disclosed content is thorough and complete and to ensure that the concept of the present invention is sufficiently conveyed to those skilled in the art. In this specification, when a component is described as being on another component, it means that it may be formed directly on the other component or that a third component may be interposed between them. Additionally, in the drawings, shapes and sizes are exaggerated for the effective illustration of the technical content. Additionally, although terms such as first, second, third, etc., have been used to describe various components in the various embodiments of this specification, these components should not be limited by such terms. These terms are used merely to distinguish one component from another. Accordingly, what is referred to as the first component in one embodiment may be referred to as the second component in another embodiment. Each embodiment described and illustrated herein also includes its complementary embodiment. Furthermore, in this specification, "and/or" is used to mean including at least one of the components listed before and after it. In the specification, singular expressions include plural expressions unless the context clearly indicates otherwise. Furthermore, terms such as "include" or "have" are intended to specify the existence of the features, numbers, steps, components, or combinations thereof described in the specification, and should not be understood as excluding the existence or addition of one or more other features, numbers, steps, components, or combinations thereof. Additionally, in this specification, "connection" is used to include both indirectly connecting multiple components and directly connecting them. Additionally, terms such as “…part,” “…unit,” and “module” described in the specification refer to a unit that processes at least one function or operation, and this may be implemented in hardware, software, or a combination of hardware and software. In addition, in describing the present invention below, if it is determined that a detailed description of related known functions or configurations could unnecessarily obscure the essence of the invention, such detailed descriptio