JPS5836214B2 - Manufacturing method for journal bearings - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a journal bearing having grooves (hereinafter referred to as pump-in grooves) for feeding lubricating fluid into a lubricated surface.

Currently, journal bearings with pump-in type grooves have been theoretically analyzed and research is progressing, but in terms of practical application,
There are few examples.

The reason for this is that it is very difficult to create pump-in type grooves and ridges on the inner diameter surface of the journal bearing or the outer diameter surface of the shaft.

The object of the present invention is to provide a method for manufacturing a pump-in type grooved journal bearing that eliminates this problem and can be easily manufactured without degrading the theoretically analyzed performance.

FIG. 1 is a perspective sectional view of a journal bearing obtained by the present invention, FIG. 2 is a sectional view of the bearing, FIG. 3 is a side view of the bearing, and FIG. 4 is an exploded view of the bearing in the process of being manufactured. Fifth
The figure is an exploded view of a conventional journal bearing in the process of being manufactured.

The following will explain using these figures.

In FIGS. 1 to 4, 1 is a ridge on the cut end, 2 is a V-shaped groove, and 3 is a ridge on the other cut end.

In FIG. 5, 4 is a ridge at one end, 5 is a groove, and 6 is a ridge at the other end.

A journal bearing can be made by winding each of the exploded views shown in FIG. 4 or 5 into a cylindrical shape, but if the roll is cut so that both cut end surfaces 7 and 8 are parallel as shown in FIG. When bending into a cylindrical shape, it is very difficult to match the cut end surface of the ridge 4 with the cut end surface 6 of the ridge, and the effective cross-sectional area of the groove is reduced by the error.

Even if they are made to match, it is necessary to bond both cut end surfaces 7, 8 by brazing or the like to prevent oil leakage from the cut end grooves 9, 10, etc.

Note that the grooves 2 and the ridges are formed to have an oblique angle with respect to the axial direction.

That is, it is formed in a V-shape when viewed from a direction perpendicular to the axis.

On the other hand, in the manufacturing method of the present invention, as shown in the developed view of FIG. Since the material is arranged parallel to both edges of the material and cut along the V-shaped ridge approximately in the center of the ridge, the ridge 1 at the cut end and the ridge 3 at the other cut end are separated. are adjacent to each other, so that the cross-sectional area of the pump-in type groove can always be maintained without worrying about manufacturing errors, etc., and the oil fluidly sucked in by the pump-in type groove is Even if 12 is not bonded by brazing or the like, the pressure increases without escaping and pushes the shaft to the center, creating a complete fluid bearing, making it possible to obtain a long-life, low-noise journal bearing.

Note that various flat materials such as brass, resin, and iron can be used as the material for the journal bearing used in the present invention.

Further, when the sheet is rolled into a cylindrical shape so that the ridges are brought into contact with each other, both cut end surfaces 11 and 12 may be bonded together by brazing or the like, if necessary.

As described above, in the method for manufacturing a journal bearing of the present invention, a plurality of V-shaped grooves and ridges are alternately provided in a flat material, and a line connecting the vertices of the ■-shaped grooves is connected to both ends of the flat material. Pump-in type It is easy to manufacture without worrying about reducing the groove cross-sectional area, which has the greatest effect on the performance of grooved journal bearings, and it also prevents oil leakage without having to bond both cut ends by brazing or other means. No journal bearing can be provided.

[Brief explanation of drawings]

Fig. 1 is a slanted sectional view of a journal bearing obtained by the manufacturing method of the present invention, Fig. 2 is a front sectional view of the bearing, Fig. 3 is a side view of the bearing, and Fig. 4 is a stage in the manufacture of the bearing. FIG. 5 is a developed view of a conventional journal bearing in the process of being manufactured. 1, 3... ridge, 2... groove, 11, 12
・・・・・・Cut end surface.

Claims (1)

[Claims] 1 A plurality of V-shaped grooves and ridges are provided alternately in a flat material, and the lines connecting the vertices of the ■-shaped grooves are arranged parallel to both edges of the flat material, and the ridges are approximately A method for manufacturing journal bearings in which the central part is cut along V-shaped ridges and wound into a cylindrical shape so that the ridges abut each other.