JP3229486U - Rolling bearing device with lubricant supply mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To secure a sufficient lambda value of a lubricant on a bearing guide surface during operation of a bearing, facilitate introduction of a lubricant by jet lubrication, simplify the lubricant supply structure, and rotate the bearing at high speed. Provide rolling bearings with a lubricant supply mechanism capable of. SOLUTION: A rolling bearing 1 has a plurality of rolling elements 4 which are located between an inner ring 3, an outer ring 2, an inner ring 3 and an outer ring 2 and which rotate the inner ring 3 and the outer ring 2 relative to each other, and a plurality of rolling elements 4 at equal intervals. A lubricant supply mechanism 6 which is provided with a cage 5 which is guided by an inner ring 3 and is provided with an injection nozzle 7 which is adjacent to the axial end surface of the rolling bearing 1 and supplies the lubricant to the rolling bearing 1. In a rolling bearing with a lubricant supply mechanism, the entire area of the inner peripheral surface of the inner ring 3 adjacent to the lubricant supply mechanism 6 that does not face the cage 5 is used as a chamfering portion 3a to provide a receiving space. 3b is provided, and the receiving space 3b is configured to be located on the line of sight of the injection nozzle 7. [Selection diagram] Fig. 1

Description

The present invention relates to a rolling bearing and a lubricating structure for rolling bearings. More specifically, a lubricant required for high speed and high reliability used in a gearbox of a jet engine or a gas turbine, a fuel pump of a rocket engine, or the like. Regarding rolling bearing devices with a supply mechanism.

Conventionally, in rolling bearings that require high speed and high reliability used in aircraft engines, etc., lubrication is performed from the inner diameter side of the bearing in order to reliably and efficiently supply the lubricant to the inside of the bearing, especially to the sliding parts. The underrace lubrication method that supplies the agent was applied. (Patent Document 1) Further, an underrace lubrication method is effective as a lubricant supply mechanism in order to realize smooth high-speed rotation while reducing the stirring resistance of the lubricant by using the minimum lubricant required by the bearing. Met.

Japanese Patent No. 2740304

However, in the underrace lubrication method of Patent Document 1, since the lubricant is supplied from the inner diameter side of the bearing, it is necessary to increase the number of components around the shaft and to provide lubrication holes and grooves in the bearing, which complicates the structure and weight. There were problems such as an increase in bearings and an increase in costs.

In addition, in bearings that rotate at high speeds such as aircraft engines, the cage may be of the inner ring guide type for the purpose of preventing skidding damage, but instead of the above underrace lubrication method,
If a jet lubrication method with a simplified lubricant supply mechanism is adopted, it is difficult to accurately supply the lubricant to the guide surface of the cage, and there is a risk that the efficiency of lubricating the lubricant supply to the rolling elements will decrease.

The present invention has been made in view of such circumstances, and makes it possible to secure a sufficient lambda value of the lubricant on the bearing guide surface during operation of the bearing and to facilitate the introduction of the lubricant by jet lubrication. The purpose is to satisfy the bearing rotation function by the jet lubrication method without increasing the number of components around the shaft and providing holes and grooves in the bearing.

The first device for solving the above-mentioned problems is to include an inner ring, an outer ring, a plurality of rolling elements between the inner ring and the outer ring that rotate the inner ring and the outer ring relative to each other, and a plurality of the rolling elements. A lubricant supply mechanism provided with a rolling bearing provided with a cage that is held at intervals and guided by an inner ring, and an injection nozzle that supplies a lubricant to the rolling bearing adjacent to the axial end face of the rolling bearing. In a rolling bearing device with a lubricant supply mechanism provided with the above, the entire area of the inner peripheral surface of the inner ring adjacent to the lubricant supply mechanism, which does not face the cage, is used as a chamfered portion. It is characterized in that a receiving space for introducing a lubricant is provided, and the receiving space is located on the line of sight of the injection nozzle.

Further, the second invention is the inner ring, the outer ring, and the inner ring between the inner ring and the outer ring.
A rolling bearing having a plurality of rolling elements that rotate the outer ring relative to each other and a cage that holds the plurality of rolling elements at equal intervals and is guided by the inner ring is provided, and is adjacent to the axial end face of the rolling bearing. In a rolling bearing device with a lubricant supply mechanism provided with a lubricant supply mechanism provided with an injection nozzle for supplying the lubricant to the rolling bearing, chamfering is performed on the end of the cage on the side facing the outer peripheral surface of the inner ring. By providing a portion and using the inner peripheral surface of the inner ring facing the chamfered portion of the cage as the chamfered portion, a tapered space for introducing a lubricant is provided, and the tapered space is used for firing the injection nozzle. It is characterized by being located on a line.

According to the present invention, the inner peripheral surface of the inner ring of the bearing and / and the inner peripheral surface of the inner ring are chamfered to provide a space for introducing the lubricant, and the space is positioned on the line of sight of the injection nozzle that supplies the lubricant to the bearing. Therefore, it becomes possible to sufficiently secure the lambda value of the lubricant on the bearing guide surface during the operation of the bearing, and it becomes easy to introduce the lubricant by jet lubrication. This makes it possible to provide a rolling bearing with a jet lubrication type lubricant supply mechanism that satisfies the bearing rotation function with a simple structure without increasing the number of components around the shaft or providing holes or grooves in the bearing.

It is sectional drawing which shows the rolling bearing with a lubricant supply mechanism of 1st Embodiment of this invention. It is sectional drawing which shows the modification of the 1st Embodiment of this invention. It is sectional drawing which shows the rolling bearing with the lubricant supply mechanism of the 2nd Embodiment of this invention. It is sectional drawing which shows the modification of the 2nd Embodiment of this invention. It is a figure which shows the whole of the rolling bearing with a lubricant supply mechanism of this invention. It is sectional drawing which shows the conventional rolling bearing with a lubricant supply mechanism.

Hereinafter, the first embodiment of the present invention will be described with reference to FIGS. 1 and 5. The bearing 1 includes an outer ring 2, an inner ring 3, a plurality of rolling elements 4 located between the outer ring 2 and the inner ring 3 and relatively rotating the outer ring 2, the inner ring 3, and the plurality of rolling elements at equal intervals. It is provided with a cage 5 for holding. A lubricant supply mechanism 6 is provided adjacent to the bearing in the uniaxial direction, and the lubricant supply mechanism 6 is provided with an injection nozzle 7. A chamfered portion 3a is provided on the inner peripheral surface of the inner ring 3 on the side adjacent to the lubricant supply mechanism over the entire region not facing the cage 5, and the outer ring 2 is provided on the side surface in the uniaxial direction of the bearing. A receiving space 3b for introducing a lubricant is formed between the inner rings 3. The injection nozzle 7 of the lubricant supply mechanism 6 is provided so that the receiving space 3b is located on the line of sight thereof. This makes it easier to introduce the lubricant by jet injection into the rolling element 4 inside the bearing 1.

FIG. 2 is a diagram showing a modified example of the first embodiment of the present invention. The same configuration as the first embodiment of the present invention shown in FIG. 1 will be omitted. The configuration in which this modification is different from the first embodiment of the present invention is that the chamfered portion 3c is also provided on the inner peripheral surface of the inner ring 3 on the side opposite to the side adjacent to the lubricant supply mechanism 6 in the bearing uniaxial direction. It is provided. The chamfered portion 3c can be appropriately provided according to the usage conditions (rotation speed, load applied to the bearing, temperature of the lubricant, circulation rate of the lubricant, etc.).

A second embodiment of the present invention will be described with reference to FIG. The bearing 21 has an outer ring 22 and an inner ring 2.
3. A plurality of rolling elements 24 that are located between the outer ring 22 and the inner ring 23 and rotate the outer ring 22 and the inner ring 23 relative to each other, and a cage 25 that holds the plurality of rolling elements at equal intervals. There is. The cage 25 is provided with a lubricant supply mechanism 6 adjacent to the bearing 21 in the axial direction, and the lubricant supply mechanism 6 is provided with an injection nozzle 7. A chamfered portion 25a is provided at the end of the cage on the side facing the outer peripheral surface of the inner ring, and the inner peripheral surface of the inner ring facing the chamfered portion of the cage is 23a with the chamfered portion. A tapered space 23b for introducing a lubricant is formed between the outer ring 22 and the inner ring 23 on the axial side surface of the bearing 21. Then, the injection nozzle 7 of the lubricant supply mechanism 6 has the taper space 23 on its line of sight.
It is provided so that b is located. As a result, the lubricant produced by jet injection is applied to the bearing 21.
It becomes easy to introduce into the rolling element 24 inside.

FIG. 4 is a diagram showing a modified example of the second embodiment of the present invention. The same configuration as the second embodiment of the present invention shown in FIG. 3 will be omitted. In a configuration in which the present modification is different from the second embodiment of the present invention, a chamfered portion 25b is provided on the inner peripheral surface of the cage end on the side opposite to the side adjacent to the lubricant supply mechanism 6 in the bearing 21 axial direction. The chamfered portion 23c is also provided on the inner peripheral surface of the inner ring 23 end portion so as to correspond to the chamfered portion 25b. Further, the chamfered portions 25b and 23c can be appropriately provided according to usage conditions (rotation speed, load applied to bearings, lubricant temperature, lubricant circulation rate, etc.).

The lubricant of the present invention can be appropriately selected according to the required performance of the device to be applied, such as grease lubrication and oil lubrication. Further, the chamfered portion of the present invention may be replaced with an R-shaped corner.

1 Bearing 2 Outer ring 3 Inner ring 3a Chamfered part 3b Receiving space 4 Rolling element 5 Cage 6 Lubricant supply mechanism 7 Injection nozzle

Claims (1)

A cage that holds the inner ring, the outer ring, a plurality of rolling elements that are between the inner ring and the outer ring and rotate the inner ring and the outer ring relative to each other, and the plurality of rolling elements at equal intervals, and is guided by the inner ring. In a rolling bearing with a lubricant supply mechanism, which comprises a rolling bearing provided with and provided with a lubricant supply mechanism provided with an injection nozzle for supplying a lubricant to the rolling bearing adjacent to the axial end surface of the rolling bearing. The entire area of the inner peripheral surface of the inner ring adjacent to the lubricant supply mechanism that does not face the cage is used as the chamfered portion to provide a receiving space for introducing the lubricant and to receive the lubricant. A rolling bearing with a lubricant supply mechanism, characterized in that the space is located on the line of sight of the injection nozzle.