JPS6313045B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tail-ink pad type journal bearing.

As shown in FIGS. 1 and 2, a conventional journal bearing of this type has a plurality of pad members 2 having a fan-shaped cross section arranged in a ring inside a support ring 1, and an inner surface 2a of each pad member 2. A white metal is stretched as a bearing material, and this white metal slides relative to the rotating sliding shaft. Each pad member 2 is tiltable relative to the support ring 1 by engagement of a pivot plate 3 and a pin 4. An oil stop ring 5 is attached to cover the side surface of the support ring 1 and surround a rotating shaft (not shown) to prevent lubricating oil from leaking out.

Oil for lubricating this bearing enters through oil supply holes 6 provided on the upper, lower, left and right sides of the support ring 1, lubricates the sliding surface of the pad member 2, and used oil flows out from the side surface of the oil stopper ring 5.

In such a bearing, the pad member 2 provided in the support ring 1 supports the external load on the rotating shaft, and the pivot plate 3 and the pin 4 support the external load.
It is possible to swing along the spherical surface of the pivot plate 3. Further, the pad member 2 is inclined to form a wedge-shaped oil film so as to generate enough oil film pressure to support an external load. Note that arrows a and b in the figure indicate the flow direction of lubricating oil, and arrow c indicates the rotation axis (not shown).
The directions of rotation are shown respectively.

In this way, in conventional equipment, lubricating oil is supplied through the oil supply hole 6.
However, the lubricating oil flowing into the pad sliding surface is not only the new lubricating oil a supplied from the oil supply hole 6, but also the hot lubricating oil b coming out from the pad member 2 located above the rotation. Because of this, a considerably high temperature lubricating oil is supplied to each pad member 2, and the temperature at the exit of the pad member may reach as high as 100°C, which may lead to a bearing burnout accident. For example, even if fresh lubricating oil at 40°C is supplied at the inlet of a pad member, this lubricating oil mixes with the high temperature lubricating oil flowing out from the upper pad member and
It's getting to ℃.

Further, in the conventional device described above, a portion of the lubricating oil supplied from the oil supply hole 6 flows into the pad sliding surface, and the remaining portion flows through the pad side surface 2A and the pad back surface 2B and is wasted. For this reason, not only is it necessary to supply lubricating oil several times the amount of effective oil actually required for the bearing, but there is also energy loss due to agitation on the pad side surface 2A and the pad back surface 2B, and the oil stopper ring 5 causes further energy loss. That loss is exacerbated.

The present invention was made in view of the above-mentioned drawbacks of the conventional pad members, and includes a plurality of pad members disposed on the load side, and the opposing surface side has the same curvature as the inner surface of the pad member over almost the entire area. A shaft holding member having an inner surface at both ends and a concave cutout in the center is provided, and an oil scraper member is provided between each of the members to contact the rotating shaft, and the inner surface of the pad member is provided with a shaft holding member having a concave cutout in the center. According to the present invention, the journal bearing has an opening for a lubricating oil passage communicating with a lubricating oil supply source at a position near the downstream of the oil scraper member when viewed from the rotational direction of the bearing, and according to the present invention, the opposite surface on the load side side Since the shaft holding member is provided on the side with an inner surface having the same curvature as the inner surface of the pad member over almost the entire area, manufacturing is simple, and lubricating oil can be directly supplied to the inner surface of each pad member, and the oil Since the scraping member prevents old lubricating oil (heated lubricating oil) from entering the above-mentioned components again, the cooling effect of pad members, etc. is further improved, and the amount of lubricating oil is reduced to the level of lubricating oil actually required for the bearing. It is sufficient to supply the same amount of oil, and it can be operated economically and at low cost.

Embodiments of the present invention will be described below with reference to FIGS. 3 and 4.

In the figure, 1 is a support ring located on the load surface side that generates oil film pressure with the rotating shaft (not shown) and supports the rotating shaft with the same pressure, and 2 is the inner surface 1 of the supporting ring 1.
A pivot plate 3 having a protruding spherical surface is inserted into the concave portion 2.

A pad member 4 is tiltably supported via a pin 5 that abuts on the pivot plate 3, and communicates with a lubricating oil supply source (not shown) on the upstream side of the inner surface 4a of the pad member 4 in the rotational direction of the lubricating oil. A plurality of openings 7a of the lubricant flow path 7 connected to the flexible tube 6 are arranged in parallel in the axial direction.

8 has inner surfaces at both ends 8a having the same curvature as the inner surface 4a of the pad member 4 over almost the entire area on the opposing surface side on the load surface side, and the central portion thereof is designed to eliminate the occurrence of bearing friction loss. This is a shaft holding member having a concave hollowed out portion 8b.

9 is an oil scraping member provided between the coaxial holding member 8 and the pad member 4 and between the pad members 4;
The oil scraping member 9 is formed to extend in the axial direction and constantly come into contact with a rotating shaft (not shown) by means of a spring 10.

In Fig. 3, arrow A indicates the rotation axis (not shown).
indicates the direction of rotation.

According to this embodiment configured in this way, lubricating oil is supplied to the inner surface 4a of the pad member 4, an oil film pressure is generated with the rotating shaft (not shown), and the rotating shaft is supported with the same pressure. The shaft holding member 8 for positioning the rotating shaft is on the opposite surface side of the load surface side which is the supporting side.
, the manufacturing of the entire bearing becomes extremely simple.

In addition, new lubricating oil is directly supplied from the opening 7a formed on the inner surface 4a of the pad member 4, and the old lubricating oil (heated lubricating oil) is returned to the pad member 4 and the shaft holding member 8 by the oil scraping member 9. Since all of the lubricating oil is scraped off without getting into the lubricant, only new, cold lubricating oil is supplied to the pad members 4, etc., which further improves the cooling effect of the pad members 4, etc., and prevents burnout, etc. that often occurs in conventional equipment. can.

Furthermore, like the conventional one described above, a pad member 4 is provided.
Bearing friction loss can be significantly reduced without lubricating oil flowing to the back surface of the bearing, and without forcibly blocking the lubricating oil flow with an oil stop ring.

Moreover, the above-mentioned cooling effect is improved, wasteful flow of lubricating oil is eliminated, the amount of lubricating oil supplied is the amount of lubricating oil actually required for the bearing, and it can be operated economically and at low cost. It can have a very effective effect.

This can be easily understood from the bearing loss comparison diagram shown in FIG. 5 between the conventional bearing and the bearing of this embodiment.

Although the embodiments of the present invention have been described above, the present invention is, of course, not limited to these embodiments, and can be modified in various ways without departing from the spirit of the present invention. .

[Brief explanation of the drawing]

Figure 1 is an explanatory diagram of the main parts of a conventional journal bearing, partially shown in cross section, Figure 2 is a sectional view of Figure 1,
Fig. 3 is an explanatory view of the main parts of an embodiment of the present invention partially shown in cross section, Fig. 4 is a sectional view of Fig. 3, and Fig. 5 shows bearing loss between a conventional bearing and a bearing of this embodiment. FIG. 4... Pad member, 7... Lubricating oil channel, 7a... Opening, 8... Shaft holding member, 9... Oil scraper member.

Claims (1)

[Claims] 1 A plurality of pad members are disposed on the load side, and the opposing surface side has an inner surface having the same curvature as the inner surface of the pad member at both ends over almost the entire area, and a concave hollowed portion in the center. A shaft holding member having a shaft holding member is provided, and an oil scraper member that contacts the rotating shaft is provided between each of the above-mentioned members, and a lubricant is provided on the inner surface of the pad member at a position near the downstream of the oil scraper member when viewed from the rotational direction of the rotating shaft. A journal bearing characterized by having an opening for a lubricant flow path communicating with a supply source.