JP2019183957A - Self-aligning bearing - Google Patents

Abstract

To provide a self-aligning bearing continuing smooth rotation of a rotational shaft and having a compact viscous pump with a simple structure.SOLUTION: A self-aligning bearing is a bearing against a load in the radial direction and thrust direction of a rotational shaft 2. A spherical seat 4 having a spherical surface is formed between a bearing base 3 and a base metal 5. An oil circulator 8 is provided on the bearing base 3 so as to separate from the base metal 5. The opposite surfaces between the oil circulator 8 and a rotary disk 9 are formed in a spherical shape concentric with the center of aligning rotation of the base metal 5.SELECTED DRAWING: Figure 1

Description

  The present invention provides a self-aligning bearing that receives respective loads in the thrust direction and radial direction of a rotating shaft, and includes a base metal having a spherical seat in the bearing base and a viscous pump that circulates lubricating oil. Concerning the heart bearing.

  2. Description of the Related Art Conventionally, a self-aligning bearing is known in which a base having a spherical seat is formed in a bearing base (see, for example, Patent Document 1).

  In the self-aligning bearing of Patent Document 1, when the rotating shaft bends, the base metal is automatically aligned according to the inclination of the shaft center of the rotating shaft caused by the bending, so that the bearing portion Therefore, it is possible to receive the load of the rotating body uniformly without causing a single contact.

Japanese Utility Model Sho 62-158217

  However, when the self-aligning bearing disclosed in Patent Document 1 is used as a bearing for a rotating shaft of a large rotating body such as a horizontal shaft generator, the bearing load is large and the heat generation amount of the bearing portion is also large. In order to continue the smooth rotation of the rotating shaft, it is necessary to provide an oil cooler for cooling the lubricating oil of the bearing device outside.

  In order to circulate the lubricating oil to the oil cooler, an electric pump may be provided outside, but in order to reduce the failure rate of the bearing device, it is required to have a self-circulating pump such as a viscous pump in the bearing device. Often done.

  For this reason, in the bearings of large rotating bodies, in order to lubricate the bearings against the loads in the thrust direction and radial direction of the rotating shaft, a mechanism that circulates lubricating oil including oil coolers with a viscous pump etc. It is necessary to install a viscous pump in the base metal because these mechanisms must be automatically tilted according to the inclination of the axis of the rotating shaft. There is a problem that the table becomes larger.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a self-aligning bearing having a viscous pump, which can continue the smooth rotation of the rotating shaft and can be downsized with a simple structure, in view of the problems of the prior art. .

The self-aligning bearing of the first invention is
Self-aligning bearings that receive respective loads in the thrust direction and radial direction of the rotating shaft,
In a self-aligning bearing comprising a base having a spherical seat in the bearing base and a viscous pump for circulating lubricating oil in the bearing base,
As a bearing with respect to a load in the radial direction and the thrust direction of the rotating shaft, the spherical seat having a spherical surface is formed between the bearing base and the base metal,
The oil circulator of the viscous pump is provided on the bearing base separately from the base metal, and the opposing surface between the oil circulator and the rotating disk of the viscous pump is concentric with the center of rotation of the base metal. It is characterized by being formed in a spherical shape.

  According to the first invention, since the oil circulator of the viscous pump is provided separately from the base metal, the base metal in the bearing base can be miniaturized, and as a result, the bearing base can also be miniaturized. The bearing itself can be reduced in size.

  In addition, since a spherical seat with a spherical surface is formed between the bearing base and the base metal, when the rotation axis is bent, it matches the inclination of the axis of the rotation axis caused by the deflection. The base is automatically tilted and aligned.

  In addition, the opposing surface between the oil circulator and the rotating disk of the viscous pump is formed in a spherical shape concentric with the center of rotation of the base metal, so that the base can be adjusted according to the inclination of the axis of the rotary shaft. When the gold is tilted, it is possible to prevent the oil circulator and the rotating disk from coming into contact with each other and preventing the rotation of the rotating shaft.

  From these things, according to the 1st invention, it becomes possible to continue smooth rotation of a rotating shaft.

  As described above, according to the first aspect of the present invention, there is provided a self-aligning bearing having a viscous pump having a self-aligning function capable of downsizing with a simple structure while continuing smooth rotation of the rotating shaft. be able to.

Sectional drawing of the self-aligning bearing which concerns on one Embodiment of this invention. Sectional drawing which shows the use condition of the self-aligning bearing which concerns on one Embodiment of this invention. Sectional drawing of the oil circulator and rotary disk with which the self-aligning bearing which concerns on one Embodiment of this invention is provided.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  First, the structure of the self-aligning bearing 1 according to the present invention will be described with reference to FIGS.

  As shown in FIG. 2, the self-aligning bearing 1 according to the present invention is fixed to a floor surface 17 of a facility, for example, and is installed at both ends of the rotating shaft 2 provided in the horizontal shaft type rotating body 13, respectively. The rotary shaft 2 is used as a bearing that rotatably supports the rotary shaft 2.

  The rotating body 13 is, for example, a generator, a motor, a water wheel, or the like, but is not limited thereto.

  As shown in FIG. 1, the rotating shaft 2 of the rotating body 13 passes through the self-aligning bearing 1 in the horizontal direction, and is supported by the rotating bearing 1 so as to be rotatable in the thrust direction and the radial direction of the rotating shaft 2. Yes.

  The rotating shaft 2 includes a rotating disk 9 and a thrust load receiving seat 14.

  The rotating disk 9 and the thrust load receiving seat 14 are provided integrally with the rotating shaft 2 so as to face each other with the thrust bearing 12 provided on the base 5 interposed therebetween, and rotate integrally with the rotating shaft 2.

  The rotating disk 9 has a spherical surface concentric with the base metal 5 on the surface facing the oil circulator 8.

  The self-aligning bearing 1 includes a bearing base 3, a base 5 having a spherical seat 4, a bearing seat 22, an oil circulator 8 having an oil circulator spherical portion 11, a thrust bearing 12, and a radial bearing 15.

  The bearing stand 3 is formed in a box shape having a space inside and constitutes an outer shell of the self-aligning bearing 1.

  Lubricating oil is stored in a space inside the bearing base 3, and the lubricating oil is circulated by the viscous pump 7.

  The bearing stand 3 includes a bearing seat 22 having a spherical seat 4 a concentric with the rotating shaft penetrating portion seal 16 and the spherical portion of the base metal 5.

  The rotary shaft penetrating portion seal 16 is an oil seal that prevents the lubricating oil from leaking out from the portion where the rotary shaft 2 penetrates the self-aligning bearing 1. For example, the rotary shaft penetrating portion seal 16 opposes the axial direction of the rotary shaft 2 of the bearing base 3. Provided on both sides. Alternatively, when the bearing base 3 is provided at the shaft end of the rotary shaft 2, the rotary shaft penetrating part seal 16 may be provided only on the side surface of the bearing base 3 on the side of the rotating body 13.

  The rotary shaft penetrating portion seal 16 includes, for example, an annular tooth portion arranged in parallel at intervals in the axial direction of the rotary shaft 2 on the inner peripheral surface of the rotary shaft 2 side. Is configured so as to have a very small gap between the outer peripheral surface of the rotary shaft 2 so as to prevent the lubricating oil from leaking and prevent the smooth rotation of the rotary shaft 2.

  The pair of spherical seats 4 is provided between the bearing base 3 and the base metal 5. In the present embodiment, the spherical seat 4 a on the bearing base 3 side is provided on the inner peripheral surface of the bearing seat 22 provided in the center of the bearing base 3, and supports the base 5 in the radial direction of the rotary shaft 2. Yes.

  The base 5 has a spherical seat 4b on the side of the base 5 formed so that a surface facing the bearing seat 22 of the bearing base 3 is spherical.

  As a result, when the rotating shaft 2 is bent as shown in FIG. 2, the base metal 5 is automatically tilted and aligned with the inclination of the axis of the rotating shaft 2 caused by the bending. It is possible to receive the load of the rotating body uniformly without causing a single contact of the part, and it is possible to continue the smooth rotation of the rotating shaft.

  The base metal 5 is provided with a radial bearing 15 on the inner peripheral surface, and supports the rotary shaft 2 in the radial direction of the rotary shaft 2 through the radial bearing 15 so as to be rotatable.

  The radial bearing 15 is formed in a cylindrical shape, is fixed to the inner peripheral surface of the base metal 5, and slides on the outer peripheral surface of the rotating shaft 2.

  That is, the spherical seat 4 constitutes a self-aligning bearing in the radial direction of the rotary shaft 2 together with the base 5 and the radial bearing 15.

  The thrust bearings 12 are formed in an annular shape, and are disposed one by one on both sides of the base metal 5 in the axial direction.

  Thereby, even if the load of the rotating shaft in the thrust direction is applied, smooth rotation of the rotating shaft can be reliably continued.

  The thrust bearings 12 are fixed to both sides of the base metal 5 in the axial direction. The thrust bearing 12 on the rotating disk 9 side slides on the side surface of the rotating disk 9 on the base metal 5 side, and the thrust bearing 12 on the opposite side. Slides with the side surface of the thrust load seat 14 on the base metal 5 side.

  That is, the thrust bearing 12 supports the rotating shaft 2 together with the base metal 5 so as to be rotatable with respect to thrust loads in both directions.

  The oil circulator 8 having the oil circulator spherical portion 11 is formed in an annular shape around the outer circumference of the spherical surface of the rotating disk 9, is provided separately from the base 5, and is fixed to a bearing seat 22 provided on the bearing base 3. Is done. In this embodiment, it is provided on the side surface of the bearing seat 22 of the bearing stand 3 on the rotating disk 9 side.

  As a result, the base 5 can be reduced in size, and as a result, the bearing base 3 can also be reduced in size, so that the self-aligning bearing 1 itself can be reduced in size.

  The oil circulator 8 has an oil circulator spherical surface portion 11 whose surfaces facing the rotating disk are concentric with each other with respect to the rotation center of the base metal 5, and includes a suction hole 18, a discharge hole 19, and a partition portion 20.

  The oil circulator spherical portion 11 is provided on the surface facing the rotating disk 9, and has a slight gap between the oil circulator spherical portion 11 and the rotating disk 9.

  The oil circulator spherical portion 11 is formed so that the surface facing the rotary disk 9 is concentric with the aligning rotation center 10 of the base metal 5.

  There is a very narrow gap between the oil circulator spherical portion 11 and the spherical outer periphery of the rotating disk 9, and the oil circulator spherical portion 11 and the rotating disk 9 do not contact each other.

  As a result, the oil circulator 8 and the rotating disk 9 move on a concentric spherical surface when the base metal 5 is tilted in accordance with the inclination of the axis of the rotating shaft 2, so that the oil circulator 8 and the rotating disk 9 are in contact with each other. In addition, since the gap between the oil circulator 8 and the rotating disk 9 can be prevented from changing, the rotation of the rotating shaft 2 can be continued without changing the characteristics of the viscous pump 7.

  The flow path 6 is a groove provided in the center of the surface of the oil circulator spherical portion 11 that faces the rotating disk 9, and the partition portion 20 is provided only between the suction hole 18 and the discharge hole 19 described later. .

  The suction hole 18 and the discharge hole 19 are provided in the lower part of the oil circulator 8, and one end of the suction hole 18 and the discharge hole 19 is opened so as to be connected to the flow path 6.

  The other end of the suction hole 18 is open so as to be connected to the lubricating oil accumulated in the space inside the bearing base 3.

  The other end of the discharge hole 19 is connected to a circulation pipe when an oil supply hole for the thrust bearing 12 and the radial bearing 15 and an oil cooler are provided.

  The partition portion 20 for blocking the flow path 6 in the circumferential direction is provided between the suction hole 18 and the discharge hole 19, and the surface facing the rotary disk 9 is the centering rotation center 10 of the base metal 5. And has a slight gap from the outer peripheral surface of the rotary disk 9.

  The partition portion 20 prevents the lubricating oil that has moved through the flow path 6 to the discharge hole 19 from continuing to move through the flow path 6 without being discharged from the discharge hole 19.

  When the rotating disk 9 rotates in the rotation direction 21, the lubricating oil is drawn into the flow path 6 from the suction hole 18 in the direction of the arrow IN, moves in the flow path 6 in the rotation direction 21, and moves in the direction of the arrow OUT. The oil is discharged from the discharge hole 19 to the outside of the flow path 6 in the direction and supplied to the thrust bearing 12 and the radial bearing 15. When an oil cooler is provided outside the bearing base 3, the external oil cooler is lubricated. After the oil is circulated, it is returned to the portion where the lubricating oil in the space inside the bearing base 3 is stored.

  Thereby, since lubricating oil is cooled reliably, it can prevent that the temperature in the self-aligning bearing 1 rises too much, and smooth rotation of the rotating shaft 2 can be continued.

  Thus, the oil circulator 8 and the rotating disk 9 function as the viscous pump 7 to circulate the lubricating oil inside the bearing base 3.

  The embodiment of the present invention has been described above, but the present invention is not limited to this, and can be appropriately changed in design without departing from the spirit of the present invention.

DESCRIPTION OF SYMBOLS 1 ... Self-aligning bearing, 2 ... Rotating shaft, 3 ... Bearing stand, 4 ... Spherical seat, 5 ... Base metal, 6 ... Channel, 7 ... Viscous pump, 8 ... Oil circulator, 9 ... Rotary disk, 10 ... Adjustment Center of rotation, 11 ... oil circulator spherical surface, 12 ... thrust bearing, 13 ... rotating body, 14 ... thrust load receiving seat, 15 ... radial bearing, 16 ... sealing shaft through portion seal, 17 ... floor surface, 18 ... suction hole , 19 ... discharge hole, 20 ... partition, 21 ... rotational direction, 22 ... bearing seat.

Claims (1)

Self-aligning bearings that receive respective loads in the thrust direction and radial direction of the rotating shaft,
In a self-aligning bearing comprising a base having a spherical seat in the bearing base and a viscous pump for circulating lubricating oil in the bearing base,
As a bearing with respect to a load in the radial direction and the thrust direction of the rotating shaft, the spherical seat having a spherical surface is formed between the bearing base and the base metal,
An oil circulator of the viscous pump is provided on the bearing base separated from the base metal, and an opposing surface between the oil circulator and the rotating disk of the viscous pump is concentric with the center of rotation of the base metal. Self-aligning bearing characterized by being formed into a spherical shape.