Novel high-speed railway power bearing

Abstract

The invention relates to bearings, in particular to a high-speed railway power bearing provided with a middle ball reducing middle ring. The novel high-speed railway power bearing is composed of the reducing middle ring provided with a middle ball, an outer ferrule provided with a ball bladder inner track, two double-half inner ferrules, an inner-layer rolling body and an outer-layer rolling body.According to the bearing, the mechanical structure of a double-row angular contact ball bearing or a deep groove ball bearing is arranged in the middle of the inner circumference (or the inner circumference and the outer circumference) of the reducing middle ring and arranged between two sections of circular ring rollers or two sections of cylindrical rollers, the advantage of two-point contact pure rolling friction of a ball rolling body is fully utilized to bear bidirectional combined loads, the mechanical structure of the middle ball is created, the radial bearing capacity of the bearing can be greatly improved, the rotating speed and the rotating precision of the bearing are effectively improved, and the bearing is high in speed, low in friction, slow in temperature rise and long in service life.

Description

technical field [0001] The invention relates to high-speed rail bearings and auxiliary bearings for various suspension trains. Background technique [0002] At present: the high-speed rail bearings manufactured by developed countries in the world are still traditional single-layer tapered roller bearings with full friction based on advanced bearing materials and technology. Research data show that there are many fatal flaws in the mechanical structure of traditional tapered roller bearings, such as: [0003] 1. In the traditional single-layer tapered roller bearing, between the rollers and the raceways of the inner and outer rings, between the rollers and the cage, and between the rollers and the grease will act on the bearings in the process of rotating and doing work. 1 / 2 of the driving force is converted into frictional heat energy. Therefore: the frictional resistance and wear produced by traditional bearings must be large, easy to generate heat, and have poor high-speed...

AI Technical Summary

Problems solved by technology

[0003] 1. In the traditional single-layer tapered roller bearing, between the rollers and the raceways of the inner and outer rings, between the rollers and the cage, and between the rollers and the grease will act on the bearings in the process of rotating and doing work. 1 / 2 of the driving force is converted into frictional heat energy. Therefore: the frictional resistance and wear produced by traditional bearings must be large, easy to generate heat, and have poor high-speed performance, which can directly lead to many safety hazards in high-speed rotation of bearings.

[0004] 2. Stress concentration: The stress concentration at the end of the tapered roller bearing roller is a congenital fatal defect that cannot be cured, and its common main hazard is to cause raceway indentation and peeling.

[0005] 3. The rollers are easy to skew: The biggest congenital fatal flaw of tapered roller bearings is that the uneven force on the contact line of the rollers during rotation can easily make the rollers skew. The mechanical concept of roller skew is: when the rollers are skewed , its rolling surface is no longer in linear contact with the raceway, but is tightly stuck between the raceways of the inner and outer rings at a certain angle like a wedge, and slides and rubs against the inner and outer rings, resulting in one end of the rolling body Indentation or spalling, the other end is severely worn, directly causing ring raceway indentation, peeling, cage cracking or rib cracking, which often occurs in wheel bearings of heavy-duty vehicles, and currently developed countries are using additional rollers The method of convexity reduces the stress concentration of the roller end, but still cannot change the mechanical nature of the stress concentration, nor can it fundamentally correct the defects of its innate mechanical structure.

[0006] According to the technical deficiencies of traditional high-speed rail bearings, in the previous utility model ZL201621332291, 5 "a new type of high-speed rail dynamic bearing", the mechanical structure of the four-point contact of the center ball was used to replace the tapered roller bearing the two-way axial bearing with the inclination angle. The load design scheme effectively reduces the friction resistance and roller skew of the tapered rollers, but: the four-point contact ball bearings still have slight sliding friction when bearing pure radial loads, and cannot withstand higher operating speeds. With people's higher demand for travel, China's high-speed rail is currently marching towards high-speed rail with a speed of more than 400 kilometers per hour and maglev trains with a speed of 600 to 1,000 kilometers per hour. Therefore: the present invention has carried out in-depth technical innovation on high-speed rail bearings,

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