JPH0723612Y2 - Split bearing - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Industrial field of application The present invention is a bearing suitable for supporting the rotary shaft of various pumps such as seawater pumps and river water pumps, and rotating equipment such as water turbines and agitators. Regarding

2. Description of the Related Art FIG. 6 is a vertical sectional view of a conventional bearing, and FIG. 7 is a sectional view taken along line VII-VII of FIG.

In these figures, 1 is a main shaft of a rotating device such as a pump, and 2 is a casing of the pump. Reference numeral 3 denotes a bearing housing, and a cylindrical bearing 5 formed of ceramic is fixed to an inner surface of the bearing housing via a shock absorbing rubber ring 4. The bearing 5 supports the main shaft 1 so that it can rotate stably.

Although not shown, an impeller is provided in the lower part of the main shaft 1, and the impeller is rotated by the rotation of the main shaft 1 to suck and discharge water. There is a gap h between them, and a very small amount of water W flows to the discharge port side through this gap h.

Problems to be Solved by the Invention By the way, the diameter of the ceramic bearing 5 formed in a cylindrical shape is 300 mm due to the problem of the manufacturing capacity by ceramic molding.
It was possible to manufacture only a small size, and it was difficult to manufacture a larger ceramic bearing. As the diameter becomes larger, the wall thickness becomes thinner and becomes more vulnerable to impact, and as the diameter becomes larger, a larger impact force is received, resulting in weakness in strength.

Further, since the conventional ceramic bearing 5 is integrally formed in a cylindrical shape, the main shaft 1 has to be pulled out at the time of overhaul and inspection, so that there is a problem that it takes time for maintenance. Further, the cylindrical ceramic bearing 5 has a problem in that the wedge action of the fluid is unlikely to occur on the bearing surface, the coefficient of friction is increased, and the reliability is poor.

Means for Solving the Problems In order to solve the problems of the prior art, the present invention is directed to a bearing that supports a rotating shaft, and a bearing housing divided into two along the axial direction, and a bearing housing inside each of the bearing housings. A plurality of bearing pieces which are adhered to an elastic member and which are divided in the circumferential direction and which are arcuate and have a convex shape on the inner surface side; An L-shaped bearing piece pressing member that is fixed to both axial ends of the bearing housing and has an inner diameter side bent inward, and an L-shaped portion of the bearing piece pressing member and the axial direction of the bearing piece. It is configured so as to include a pair of elastic parts that are interleaved in an L shape between both ends and support the bearing piece in the axial direction and the radial direction.

Effect According to the above means, the part to be molded with ceramic etc. is divided into multiple pieces, so it is easy to manufacture a large-diameter bearing that is resistant to impact, and because it is a split type, it can be easily disassembled for maintenance and inspection. Since maintenance is easy and a wedge action of fluid is likely to occur on the bearing surface, it is possible to reduce the friction coefficient and improve reliability.

Embodiment An embodiment of the bearing according to the present invention will be described below with reference to FIGS.
This will be described in detail with reference to the drawings.

FIG. 1 is a transverse sectional view of an embodiment of the split type bearing according to the present invention, and FIG. 2 is a sectional view taken along line II-II of FIG.

In these figures, 1 is a main shaft, which is the same as the conventional one shown in FIGS. 6 and 7. Reference numeral 11 denotes a bearing housing divided into two along the axial direction, and a rubber ring 12 for shock absorption is fitted along each inner surface of each bearing housing 11. Reference numeral 13 denotes a bearing piece that supports the main shaft 1, which is made of ceramic and is divided into, for example, four parts in the circumferential direction. Therefore, 2 for each bearing housing 11
Bearing pieces 13 are provided by being bonded to the rubber ring 12 one by one.

As shown in FIGS. 2 and 3, the bearing piece 13 is formed in an arcuate shape and has a convex shape on the inner surface side, and both ends in the axial direction are stably held by the bearing piece pressing member 14. ing. The bearing piece pressing member 14 is fixed to the bearing housing 11 with bolts 15. The shape of the bearing piece pressing member 14 is an arc-shaped inner diameter side bent inward as shown in FIGS. 3 and 4. A protrusion 16 is formed in the middle of the plate having a letter shape, and the bent L-shaped portion 17 serves as a support portion.

Between the projecting portion 16 and the L-shaped portion (support portion) 17, as shown in FIG. 5, an axial direction supporting rubber plate 18 for axially supporting the bearing piece 13 at a required position, Also bearing piece 13
And a rubber plate 19 for supporting the radial direction for supporting the in the radial direction. The rubber plate 18 for axial support supports the axial load of the bearing piece 13 on its bottom surface, and the rubber 19 for radial support supports the radial load of the bearing piece 13.

Effects of the Invention As described in detail above, according to the present invention, a bearing molded of ceramic or the like is divided into a plurality of arc-shaped bearing pieces, and the bearing pieces are held by a bearing piece pressing member in a bearing housing divided into two. Therefore, it is possible to manufacture a large diameter bearing.

Further, since the bearing housing is divided into two, it can be disassembled without removing the main shaft, and maintenance becomes extremely easy. Further, since the bearing piece is supported in the axial direction and the radial direction by a pair of elastic pieces such as a rubber plate,
The bearing piece held in the bearing housing is not constrained,
(EN) Provided is a split type bearing that has great practical effects, such as easily following eccentricity and improving the lubrication performance due to the wedge effect of a fluid.

[Brief description of drawings]

FIG. 1 is a transverse sectional view showing an embodiment of a split type bearing according to the present invention, FIG. 2 is a sectional view taken along line II-II of FIG. 1, and FIG.
FIG. 4 is an enlarged perspective view showing the mounting portion of the bearing piece pressing member in the present invention, FIG. 4 is a perspective view showing an example of the bearing piece pressing member used in the present invention, and FIG.
FIG. 6 is a plan view of the bearing piece pressing member shown in the figure, FIG. 6 is a longitudinal sectional view showing a conventional bearing, and FIG. 7 is a sectional view taken along the line VII-VII of FIG. 1 …… spindle, 11 …… bearing housing, 12 …… rubber ring, 13 …… bearing piece, 14 …… bearing piece pressing member, 18
…… Axial support rubber plate, 19 …… Radial support rubber plate.

Claims (1)

[Scope of utility model registration request] 1. A bearing for supporting a rotary shaft, which is bonded to a bearing housing divided into two along the axial direction and an elastic member provided in each of the bearing housings, and divided in the circumferential direction. A plurality of arcuate bearing pieces that are convex toward the inner surface, and are fixed to both axial ends of the bearing housing so as to hold the axial ends of each bearing piece. And a L-shaped bearing piece pressing member, and an L-shaped portion between the L-shaped portion of the bearing piece pressing member and both axial ends of the bearing piece.
A split-type bearing comprising a pair of elastic pieces that are interleaved in a letter shape and support the bearing piece in the axial direction and the radial direction.