JPH10292821A - Bearing lubricating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a trouble due to a lubricating defective at the time of a high speed revolution by situating a plurality of nozzle tips for lubricating between an inner ring and a cage and between an outer ring and the cage, respectively. SOLUTION: A cage 7 installs a spacer 8 in an outer ring 1, internally mounts an oil feeding path 9 and connects the oil feeding path 9 and oil feeding nozzles 10, 11, in an inner ring guide N-shaped cylindrical roller bearing. The oil feeding nozzle 10 is turned to a narrow clearance 5 between a cage guide surface 4 of the inner ring 2 and the cage 7 and is provided at a right angle to a bearing side surface to situate the tip, and the oil feeding nozzle 11 is provided at a right angle to the bearing side surface to be situated between the outer ring 1 and the cage 7. The oil feeding nozzles 10, 11 can be arbitrarily set without limiting the number of disposition, disposition intervals and a nozzle diameter, in particular, and lubricating oil injection speed from the oil feeding nozzles 10, 11 may be allowed to be known speed. Therefore, lubricating oil is sufficiently supplied to a raceway surface 3 and the cage guide surface 4 via the oil feeding nozzles 10, 11 and the possibility of generation of a trouble due to lubricating shortage becomes extremely low.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bearing lubrication system in which sufficient lubrication is required in a bearing at a high speed.

[0002]

2. Description of the Related Art For example, lubrication of a cage guide surface (inner ring outer peripheral surface) in an inner ring guide type N-type (with an inner ring flange) cylindrical roller bearing lubricates a slight gap between the cage guide surface and the cage. It is performed by the entry of the agent. If the lubricant is not sufficiently supplied to the gap, there is a problem that the cage guiding surface may be worn away.

Jet lubrication (lubrication) has been widely known as a method for reliably and forcibly supplying a lubricant into a bearing rotating at high speed. That is, in this method, the oil supply nozzle hole of the oil supply device is arranged near the bearing, and by forcibly pumping the lubricating oil, the lubricating oil is injected vigorously from the nozzle hole, and is formed on the bearing side surface by the high-speed rotating bearing. Lubricating oil is reliably supplied into the bearing through the air curtain.

[0004]

However, since the lubricating oil entering the bearing during high-speed rotation is forced to rotate while being stirred by the rolling elements and the cage, centrifugal force acts on the lubricating oil itself. In this case, the lubricating oil easily accumulates on the outer ring side, and the lubricating oil hardly exists on the inner ring side. Also,
The lubricating oil scraped by the rolling elements is transferred to the inner ring raceway surface to compensate for the lack of lubrication, and lubricating oil is supplied. The quantity supplied to the small gap between the vessel guide surface and the cage is not sufficient.

Therefore, looking at the prior art, as shown in FIG.
The arrangement of 900 is known. In the figure, 100
Is an outer ring, 200 is an inner ring, 300 is an inner ring raceway surface, 600 is a rolling element, 800 is a spacer attached to the outer ring 100 and has a lubricating oil passage and a lubricating nozzle 900. However, this is a rolling element
Since the lubricating oil is squirted only at around 600, the lubricating oil squirted from the refueling nozzle 900 passes between the outer ring 100 and the cage 700 and enters the bearing rotating at high speed.
Lubricating oil collects on the raceway surface side of the outer ring 100 due to centrifugal force, and a gap 50 between the cage guide surface 400 and the cage 700 is formed.
It is difficult to supply lubricating oil to 0.

Further, as shown in FIG. 3, there is also known an apparatus in which the refueling nozzle 900 directly faces the gap 500 between the retainer guide surface 400 and the retainer 700. The gap 500 between the nozzle 90
If only 0 is injected, only a small amount of lubricating oil will pass through the gap 500, so the amount supplied into the bearing will be insufficient, which may cause problems such as seizure of the raceway surface due to insufficient lubrication.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and has as its object to aim at both a position between an inner ring and a retainer and a position between an outer ring and a retainer. The purpose of the present invention is to provide a bearing lubricating device capable of surely supplying lubricating oil to a cage guide surface and the inside of a bearing by injecting lubricating oil to prevent trouble caused by poor lubrication during high-speed rotation.

[0008]

In order to solve the above-mentioned problems, the technical means of the present invention is as follows. A plurality of nozzle tips for refueling are provided between the inner ring and the retainer and between the outer ring and the retainer. It is to be on both sides in between.

[0009]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a bearing lubricating apparatus according to an embodiment of the present invention; FIG. 1 is a longitudinal side view showing one embodiment of the present invention.

In the figure, 1 is an outer ring, 2 is an inner ring, 3 is an inner ring raceway surface, 6 is a rolling element, 7 is a cage, and 8 is a spacer. The basic configuration of the bearing shown in the present embodiment is not limited to the illustrated example at all, and can be appropriately changed to a known configuration within the scope of the present invention. In this embodiment, the present invention is applied to an N-type (with an inner ring flange) cylindrical roller bearing. However, the present invention is applicable to other types of cylindrical roller bearings, tapered roller bearings, ball bearings, and the like. Needless to say, any of these can be targeted.

In this embodiment, the cage 7 is an N-type (with an inner ring flange) cylindrical roller bearing in which the cage 7 is an inner ring guide, and a gap 5 is formed between the cage guide surface 4 on the outer periphery of the inner ring 2 and the cage 7. And a plurality of refueling nozzles 1 through spacers 8 attached to the outer race 1.
0 and 11 face the bearing. Further, the outer ring 1, the inner ring 2, the inner ring raceway surface 3, the rolling elements 6, and the retainer 7 may have a well-known configuration, and a detailed description thereof will be omitted.

The spacer 8 is attached to the outer race 1 and houses a fuel supply passage 9 therein. The fuel supply passage 9 and the fuel supply nozzles 10 and 11 are connected to each other, and the fuel supply nozzle 10 is connected to the retainer guide surface 4 of the inner ring 2. The oil supply nozzle 11 is provided at right angles to the bearing side surface so as to face the narrow gap 5 between the outer ring 1 and the retainer 7 so as to face the narrow gap 5 between the outer ring 1 and the retainer 7. At right angles to it.

The number of the refueling nozzles 10, 11 is not particularly limited, and the number of the refueling nozzles and the nozzle diameter can be arbitrarily set. Also, the lubricating oil injection speed from the refueling nozzles 10 and 11 may be a known speed.

Therefore, according to the present embodiment, both refueling nozzles 1
The lubricating oil is sufficiently supplied to both the raceway surface 3 and the cage guide surface 4 via 0 and 11.

In this embodiment, the spacer 8 is provided with the oil supply passage 9 and the oil supply nozzles 10 and 11 are provided.
In this embodiment, any of a plurality of refueling nozzles 10, 11... Facing between the cage guide surface 4 of the inner race 2 and the cage 7 and between the outer race 1 and the cage 7 is shown. However, the present invention is not limited to this configuration, and a known oil supply device can be applied within the scope of the present invention.

[0016]

According to the present invention having the above configuration,
By supplying the lubricating oil directly to both the inner ring and the cage and between the outer ring and the cage in the high-speed rotating bearing, the lubricating oil can be reliably and sufficiently supplied to the cage guide surface and the bearing inside. Therefore, the possibility of occurrence of trouble due to insufficient lubrication of the cage guide surface and the raceway surface is extremely reduced.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional side view showing one embodiment of the present invention.

FIG. 2 is a longitudinal side view showing a conventional example.

FIG. 3 is a vertical sectional side view showing another conventional example.

[Explanation of symbols]

 1: outer ring 2: inner ring 4: cage guide surface 5: clearance 6: rolling element 7: cage 8: spacer 9: lubrication path 10, 11: lubrication nozzle

Claims (1)

[Claims] 1. A bearing lubrication system, wherein a lubrication nozzle tip faces both an inner ring and a retainer and between an outer ring and a retainer.