JPH0739323Y2 - Bearing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION A. Field of Industrial Application The present invention relates to a bearing device provided with a cooling mechanism by the flow of lubricating oil, and is particularly suitable for use in a bearing portion of a vertical rotating machine.

B. Outline of the device The bearing device of the present invention guides and supports the standing rotating shaft in the lubricating oil in the oil tank and introduces the lubricating oil into the internal flow passage as the rotating shaft rotates. A lubricating oil inlet is formed on a facing surface of the bearing member that faces the rotating shaft and has a bearing member for cooling, and the center of the inlet in the vertical direction is below the center of the bearing member in the vertical direction. By being configured so as to be located, it is possible to prevent air and the like from being mixed into the flow path in the bearing member which is caused by the fluctuation of the oil level of the lubricating oil due to the rotation of the rotary shaft, and significantly improve the cooling efficiency of the bearing member. At the same time, the oil level position can be set lower than in the conventional case, thereby realizing a drastic downsizing of the device configuration such as an oil tank and cost reduction.

C. Conventional technology As one type of conventional bearing device, a rotating shaft is supported by a plurality of bearing members in lubricating oil, and the accompanying flow of lubricating oil generated with the rotation of the rotating shaft is stored in the bearing member. There is a configuration in which cooling is conducted to a flow path.

As shown in the cross-sectional view of the bearing member portion of such a bearing device in FIG. 4 and in the perspective view in the direction of arrow C in FIG. 5, as shown in FIG. A plurality of bearing members 13 (only one is shown in the drawing) are arranged along the outer peripheral surface 12 in a state of sliding contact with the outer peripheral surface 12 to rotatably support the rotating shaft 11. The bearing member portion located on the upstream side in the rotating direction of the rotating shaft 11 (the direction of arrow R in the drawing) faces the rotating shaft 11 against the rotating shaft 11,
A groove 15 is formed for guiding the lubricating oil that flows by being dragged by the rotation of the rotating shaft 11, and a slot 16 is formed at the downstream end of the groove 15 along the vertical direction. There is.

The bearing member 13 is provided with a flow path 18 that is arranged along the vertical direction and has one end side opening to the upper end surface 17 of the bearing member 13 and the other end side closed in the bearing member 13.
The aforementioned long hole 16 and the flow path 18 are connected by a separate flow path 19.

Therefore, as the rotary shaft 11 rotates, the outer peripheral surface of the rotary shaft 11 rotates.
The lubricating oil in the vicinity of 12 flows by being dragged by the rotation of the rotating shaft 11, flows into the flow path formed by the groove portion 15 of the bearing member 13 and the outer peripheral surface 12 of the rotating shaft 11, and further passes through the elongated hole 16. The lubricating oil efficiently absorbs the heat generated from the sliding contact portion between the bearing member 13 and the rotating shaft 11 and cools it while flowing through the flow paths 19 and 18 in the bearing member 13. The lubricating oil that has flowed out of the bearing member 13 through the flow path 18 is further sent to an oil cooler or the like (not shown) to be cooled and then returned again to be used for lubrication and cooling.

D. Problems to be Solved by the Invention As shown in FIG. 4, in a bearing member 13 mounted on a conventional bearing device, a long hole for guiding lubricating oil to the flow paths 18 and 19 in the bearing member 13 The bearing 16 is provided at the center of the bearing member 13 in the vertical direction. The oil surface P of the lubricating oil that lubricates and cools the bearing member 13 is set at least along the upper end surface 17 of the bearing member 13 so as to completely immerse the entire bearing member 13.

However, as the rotating shaft 11 rotates, the oil level P of the lubricating oil is increased.
Since the position of fluctuates greatly in the vertical direction, in order to prevent air bubbles and the like from being mixed in the bearing member 13 due to the fluctuation and to reduce the cooling efficiency, the above-mentioned oil level P is above the bearing member 13. It must be located well above the end face 17. As a result, the size of the oil tank (particularly in the vertical direction) must be increased in order to prevent the oil from leaking from the oil tank that stores the lubricating oil, and the structure of the bearing device becomes large, resulting in a significant cost increase. There were challenges.

E. Means for Solving the Problems A bearing device according to the present invention includes a standing rotating shaft, a bearing member for guiding and supporting the rotating shaft by slidingly contacting a sliding contact surface provided on the rotating shaft, A bearing member facing the sliding contact surface of the rotating shaft, comprising: an oil tank in which a sliding contact portion of the rotating shaft and the bearing member is immersed to store lubricating oil for lubricating and cooling the sliding contact portion. In a bearing device having an inflow port for the lubricating oil provided on the facing surface and a cooling flow path provided in the bearing member in communication with the inflow port, the vertical center of the inflow port is It is characterized in that the inflow port is formed so as to be located below the center of the bearing member in the vertical direction.

F. Action As the rotating shaft that is erected and guided and supported by the bearing member rotates, the rotating shaft portion immersed in the lubricating oil in the oil tank causes the lubricating oil to flow like dragging, and the lubricating oil To the sliding contact portion between the rotary shaft and the bearing member and to the inflow port provided in the bearing member. The lubricating oil further flows from the inflow port into the flow path formed in the bearing member, and the bearing member is cooled during this. Since the vertical center of the inlet is located below the vertical center of the bearing member, the oil surface position of the lubricating oil can be lowered and the influence of oil surface fluctuation due to the rotation of the rotary shaft can be avoided.

G. Embodiment Hereinafter, an embodiment in which the bearing device according to the present invention is applied to a guide bearing of a vertical rotating machine will be described in detail with reference to the drawings. The same members as those of the conventional technique are designated by the same reference numerals, and detailed description thereof will be omitted.

As shown in the schematic sectional view of this embodiment in FIG. 1, a ring-shaped sliding member 21 is provided on a rotary shaft 11 which is erected in a state of protruding from a vertical rotary machine main body (not shown). Has been. On the outer peripheral surface 22 of the sliding member 21, a plurality of substantially rectangular plate-shaped bearing members 13 arranged along the outer periphery of the sliding member 21 so as to surround the sliding member 21 are in sliding contact with each other, and the rotating shaft 11 Supports the guide. The bearing device main body (not shown) has a casing 23 surrounding the sliding member 21 and the bearing member 13 described above.
It is provided so as to surround the rotating shaft 11. Bearing member 13
Is fixed to the tip of a support adjusting screw 26 that penetrates the outer peripheral wall 24 of the casing 23 and the supporting member 25 projecting inside the outer peripheral wall 24 along the radial direction of the rotary shaft 11. As a result, it is fixed to the casing 23. Therefore, the bearing member 13 can be adjusted so that its position with respect to the sliding member 21 can be freely moved by rotating the support adjusting screw 26.

Lubricating oil for lubricating and cooling the sliding member 21 and the bearing member 13 is stored in the lower part of the casing 23, that is, the casing 23 has a function as an oil tank. The oil surface P of the stored lubricating oil is at a position where the bearing member 13 is completely immersed, and the lubricating oil scattered in the casing 23 as the rotating shaft 11 rotates is prevented from leaking to the outside of the casing 23. An oil seal 27 is interposed between the end of 23 and the rotary shaft 11 and the sliding member 21.

Further, the transverse cross section of the bearing member 13 described above, that is, the sectional view taken along the line AA in FIG. 1 is shown in FIG. 2, and the sectional view taken along the line B in FIG. 2 is shown in FIG. Further, each of the bearing members 13 is arranged in a state of slidingly contacting the outer peripheral surface 22 of the sliding member 21 fitted to the rotating shaft 11. That is, the facing surface 14 of the bearing member 13 having a substantially rectangular plate shape with respect to the sliding member 21 is formed as a substantially arcuate curved surface that follows the outer peripheral surface 22 of the sliding member 21. Axis of rotation
A groove portion 15 is formed on the facing surface 14 of the bearing member 13 portion located on the upstream side in the rotation direction of 11 (direction of arrow R in the figure), and the downstream end portion of the groove portion 15 extends vertically. A long hole 16 is bored along the hole.

The bearing member 13 is provided with a flow path 18 that is arranged along the vertical direction and has one end side opening to the upper end surface 17 of the bearing member 13 and the other end side closed in the bearing member 13.
The aforementioned long hole 16 and the flow path 18 are connected by a separate flow path 19.

By the way, the groove portion 15 and the elongated hole 16 described in the present embodiment.
A vertical center line a of the bearing member 13 is located below the vertical center line b of the bearing member 13 by δ.
In this embodiment, by taking a large value of δ,
The upper edge 32 of the lubricating oil inlet 31 formed by the groove 15 and the slot 16
Is located so as to retreat largely downward from the upper end surface 17 of the bearing member 13. As a result, the position variation of the oil surface P due to the rotation of the rotary shaft 11 cannot reach the lubricating oil inlet 31, so that it is possible to prevent the cooling efficiency of the bearing member 13 from being lowered due to the inflow of air bubbles or the like.

Further, a discharge pipe 33 that guides the lubricating oil to a cooling means such as an oil cooler (not shown) is connected to the downstream end of the flow path 18 formed in the bearing member 13, and is connected to an oil tank portion below the casing 23. Is connected to an introducing pipe 34 for introducing the lubricating oil cooled by the cooling means.

Therefore, as the rotating shaft 11 rotates, the outer peripheral surface of the sliding member 21
The lubricating oil in the vicinity of 22 flows by being dragged by the rotation of the sliding member 21, flows into the flow path formed by the groove portion 15 of the bearing member 13 and the outer peripheral surface 12 of the sliding member 21, and has a long hole. While flowing through the flow paths 19 and 18 in the bearing member 13 via 16, the lubricating oil efficiently absorbs the heat generated from the sliding contact portion between the bearing member 13 and the rotating shaft 11 to cool the bearing member 13. To do. Lubricating oil that has flowed out of the bearing member 13 via the flow path 18 is further sent to a cooling means such as an oil cooler (not shown) via the discharge pipe 33,
After being cooled there, it is returned to the inside of the casing 23 by the introduction pipe 34 again.

By the way, in the present embodiment, the bearing member 13 is arranged in sliding contact with the sliding member 21, but it is also possible to dispose the sliding member 21 and dispose the bearing member 13 in direct sliding contact with the rotary shaft 11. Well, the shape of the bearing member 13, the groove 15 and the slot 1 formed in the bearing member 13
6, the shape of the flow paths 18, 19 is not limited to this embodiment, in short, the vertical center of the lubricating oil inlet 31 formed by the groove portion 15, the elongated hole 16 and the like is closer to the vertical center of the bearing member 13. It suffices that it is located below, so that there is a sufficient gap between the upper edge of the lubricating oil inlet 31 and the upper edge of the bearing member 13.

H. Effect of the Invention According to the bearing device of the present invention, the standing rotating shaft is guided and supported in the lubricating oil, and the lubricating oil is introduced into the internal flow passage as the rotating shaft rotates to cool itself. In the bearing member capable of performing the above, the lubricating oil inlet formed on the facing surface facing the rotation shaft is configured such that the vertical center of the inlet is located below the vertical center of the bearing member. As a result, it is possible to prevent air and the like from entering the bearing member internal passage due to the fluctuation of the lubricating oil surface due to the rotation of the rotary shaft, and the cooling efficiency is greatly improved and the size is not increased.

[Brief description of drawings]

1 is a schematic sectional view showing an embodiment of a bearing device according to the present invention, FIG. 2 is a sectional view taken along the line AA in FIG. 1, and FIG.
The figure is a perspective view seen from the arrow B in FIG. 2, FIG. 4 is a schematic sectional view of a conventional bearing device, and FIG. 5 is a perspective view seen from the arrow C in FIG. In the drawing, 11 is a rotating shaft, 13 is a bearing member, 15 is a groove portion, 16 is an elongated hole, 18 and 19 are flow paths, 21 is a sliding member, 23 is a casing, and 26.
Is a support adjusting screw, 33 is a discharge pipe, 34 is an introduction pipe, and P is an oil level.

Claims (1)

[Scope of utility model registration request] 1. An upright rotating shaft, a bearing member that guides and supports the rotating shaft by slidingly contacting a sliding contact surface provided on the rotating shaft, and a sliding contact portion between the rotating shaft and the bearing member. And an oil tank that stores a lubricating oil for lubricating and cooling the sliding contact portion, and the flow of the lubricating oil provided on the facing surface of the bearing member facing the sliding contact surface of the rotating shaft. In a bearing device having an inlet and a cooling channel provided in the bearing member in communication with the inlet, the vertical center of the inlet is below the vertical center of the bearing member. A bearing device, wherein the inflow port is formed so as to be biased.