CN106969038A - One kind is without retainer high speed roller bearing - Google Patents

Abstract

The invention discloses one kind without retainer high speed roller bearing, including outer ring, inner ring, carrying rolling element and separation rolling element composition；It is characterized in that：Inner ring, outer ring are installed with one heart, and carrying rolling element routinely requires to be arranged on the raceway circumference that outer ring and inner ring are constituted, and carrying rolling element adds separation rolling element between any two, and the diameter for separating rolling element is slightly less than carrying rolling element.It is an advantage of the invention that：Traditional retainer is replaced using rolling element is separated, avoid the frictional heating and wear-out failure problem in conventional high rate bearing between retainer and rolling element, simultaneously because the cladding without retainer, the radiating condition of carrying rolling element will also be greatly improved, so as to improve the high speed performance of bearing；Retainer is eliminated, the life-span of bearing and Jing Yin performance can be effectively improved.

Description

A high-speed rolling bearing without cage

technical field

The invention relates to the field of high-speed rolling bearings, in particular to a high-speed rolling bearing without a cage, which can better meet the use requirements of high-speed bearings such as aero-engines and high-speed rails.

Background technique

With the development requirements of high-speed bearings in high-speed machinery such as aero-engines becoming more and more sensitive to frictional heat and wear, problems such as frictional heat dissipation and wear damage between traditional cages and rolling elements have become more and more acute. The traditional solution is to continuously increase the requirements for the cage. In addition to a certain strength, the material of the cage is required to have good thermal conductivity, small friction factor, good wear resistance, strong impact toughness, low density and linear expansion coefficient. Close to the rolling elements, high processing precision and other stringent requirements, the current technical means have reached their limits, and the room for improvement is limited.

A high-speed rolling bearing without a cage proposed by the present invention can better avoid the above-mentioned problems. Compared with the traditional rolling bearing, the separated rolling elements are used instead of the traditional cage, which avoids the gap between the cage and the rolling elements in the traditional high-speed bearing. At the same time, because there is no cover of the cage, the heat dissipation conditions of the loaded rolling elements will also be greatly improved, thereby improving the high-speed performance of the bearing, and effectively improving the life and quiet performance of the bearing. Compared with the cageless rolling bearing proposed in the patent (patent number: 201410621736.6), the advantage is that the structure is simpler and more reliable, and it can be applied to high-speed occasions.

Contents of the invention

The technical problem mainly solved by the present invention is to solve the problems existing in current high-speed bearings such as frictional heating between rolling elements and cages, deterioration of bearing lubrication effect caused by excessive wear, overheating of bearings, and destruction of cages caused by excessive wear.

In order to solve the above technical problems, a technical solution adopted by the present invention is: a cageless high-speed rolling bearing, which consists of an outer ring, an inner ring, bearing rolling elements and separated rolling elements; it is characterized in that: the inner ring and the outer ring are concentric For installation, the load-bearing rolling elements are arranged on the circumference of the raceway formed by the outer ring and the inner ring according to the conventional requirements. Separated rolling elements are added between the loaded rolling elements, and the diameter of the separated rolling elements is slightly smaller than that of the loaded rolling elements.

Further, the load-bearing rolling elements can be existing various types of rolling elements, including: round balls, cylindrical balls, needle rollers, etc., and the load-bearing rolling elements are evenly distributed between the inner ring and the outer ring by means of the isolation effect of separating the rolling elements on the raceway.

Further, the structural shape of the separated rolling elements is the same as that of the loaded rolling elements, and is made of light and soft materials containing solid lubricants such as graphite or oil-soaked ceramics. on the raceway between the ring and the outer ring.

The beneficial effects of the present invention are: 1. The traditional cage is replaced by separated rolling elements, which avoids the problems of frictional heating and wear damage between the cage and the rolling elements in traditional high-speed bearings. The heat dissipation conditions of the rolling elements will also be greatly improved, thereby improving the high-speed performance of the bearing; 2. Compared with the complex cage of the separated rolling cage, the manufacturing process can be simplified and the manufacturing cost can be reduced; 3. In the special case of a failure in the lubrication system , The self-lubrication of the separated rolling elements is also conducive to maintaining the short-term work of the bearing; 4. The cage is removed, which can effectively improve the life and quiet performance of the bearing.

Description of drawings

Fig. 1 is a partial cross-sectional schematic view of a preferred embodiment of the present invention in operation.

Fig. 2 is a schematic plan view of a preferred embodiment of the present invention.

Fig. 3 is a schematic perspective view of a preferred embodiment of the present invention.

Attachment: The marks of the components in the figure are as follows: 1. Outer ring; 2. Inner ring; 3. Bearing rolling body; 4. Separating rolling body.

detailed description

The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, so as to define the protection scope of the present invention more clearly.

Please refer to Figures 1-3, the embodiment of the present invention includes: a cageless high-speed rolling bearing, which consists of an outer ring (1), an inner ring (2), a bearing rolling element (3) and a separating rolling element (4); The feature is that the inner ring (2) and the outer ring (1) are installed concentrically, the bearing rolling elements (3) are arranged on the circumference of the raceway formed by the outer ring (1) and the inner ring (2) according to conventional requirements, and the bearing rolling elements (3) ) between two pairs of separating rolling elements (4), and the diameter of the separating rolling elements (4) is slightly smaller than that of the bearing rolling elements (3). Loaded rolling elements (3) and separated rolling elements (4) are arranged alternately. The separated rolling elements (4) replace the traditional bearing cage to separate and disperse the loaded rolling elements. When the bearing is working, the separated rolling elements only bear their own centrifugal force and The slight contact friction of the adjacent bearing rolling elements does not bear other working loads, and only plays the role of separating and lubricating the bearing rolling elements.

The load-bearing rolling elements (3) of the present invention can be existing various types of rolling elements, and the load-bearing rolling elements (3) are evenly distributed between the inner ring (2) and the outer ring (1) by means of the isolation effect of the separating rolling elements (4). ) on the raceway between them, it plays the supporting role of normal bearing rolling body.

The structural shape of the separating rolling body (4) of the present invention is the same as that of the bearing rolling body, and is made of light and soft materials containing solid lubricants such as graphite or oil-impregnated ceramics, and its diameter is slightly smaller than that of the bearing rolling body (3). , evenly distributed on the raceway between the inner ring (1) and outer ring (2), the role of separating the rolling elements is equivalent to the role of the traditional cage, so that the rolling elements are evenly distributed, and at the same time have a lubricating effect.

The above is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the description of the present invention and the contents of the accompanying drawings, or indirectly used in other related technical fields, All are included in the patent protection scope of the present invention in the same way.

Claims (3)

1. it is a kind of without retainer high speed roller bearing, including outer ring, inner ring, carrying rolling element and separation rolling element composition；It is special Levy and be：Inner ring, outer ring are installed with one heart, and carrying rolling element routinely requires to be arranged in the raceway circumference that outer ring and inner ring are constituted On, carrying rolling element adds separation rolling element between any two, and the diameter for separating rolling element is slightly less than carrying rolling element.

2. one kind according to claim 1 is without retainer high speed roller bearing, it is characterised in that：Carrying rolling element can be Existing various rolling element, comprising：Circular ball, cylindrical roller, needle roller etc., carrying rolling element by means of separate rolling element every It is distributed in from even action on the raceway between inner ring and outer ring.

3. one kind according to claim 1 is without retainer high speed roller bearing, it is characterised in that：Separate outside rolling element structure Just as carrying rolling element, made of the lightweight of the kollag such as graphitiferous or immersion oil ceramics, soft material, its diameter is slightly less than Carry on the diameter of rolling element, the spaced raceway being evenly distributed between inner ring and outer ring.