Oil film lubrication method between large-end face of taperroller and capped edge of housing washer in thrush bearing

Abstract

The invention discloses an oil film lubrication method for thrust bearing tapered rollers and seat ring ribs. Rolling bearings involved in mechanical transmission. The invention aims at the mixed friction state between the large end face of the tapered roller and the inner surface of the rib of the seat ring in the rolling bearing, making it a pure liquid friction of oil film lubrication, thereby improving the overall performance of the bearing. In the present invention, a wedge-shaped gap is formed between the large end surface of the roller and the inner wall of the raceway rib, and filled with lubricating oil. When the shape and size of the gap match the axial load, sliding speed, and viscosity of the lubricating oil, the A hydrodynamic oil film is formed between the two surfaces. The wedge-shaped gap is formed between the large end surface of the tapered rolling ball and the spherical ring of the rib of the seat ring. Reasonable selection of the spherical radius SRQ of the inner surface of the rib of the seat ring and the shaft ring and the spherical radius srq of the large end surface of the tapered rolling can make The wedge-shaped gap is easier to form a dynamic pressure oil film. The invention has the advantages of reducing friction coefficient, improving transmission efficiency, reducing energy consumption, improving bearing capacity and reliability of bearings, and the like.

Description

technical field [0001] The invention belongs to a rolling bearing of a mechanical transmission device, and relates to a design method for changing the frictional properties of the loaded sliding part of the rolling bearing and forming dynamic pressure oil film lubrication (or thick film lubrication) to improve transmission efficiency and reliability; The breakthrough and improvement of transmission design ideas and methods. Background technique [0002] Thrust tapered roller bearings bear axial load; it consists of two flat rings, tapered rollers and a cage; the flat ring matching the seat is called the seat ring, and the flat ring matching the shaft is called the shaft ring. The middle one is the rolling body - tapered roller (hereinafter referred to as "tapered roller"), and the cage is to make the arrangement of the tapered rollers in an orderly manner; the seat ring and the shaft ring are only one stationary and the other rotating, and their structure and force element ...

AI Technical Summary

Problems solved by technology

Taking petroleum drilling equipment as an example, the thrust bearing of the faucet (or the thrust bearing of the hook) is the most critical working part of the equipment. Because it works under harsh conditions such as poor environment, heavy load, continuous operation, and difficulty in assembly and disassembly, the It is prone to failure or failure and at the same time will cause a great loss in production

On-site statistical data show that the main reason for the failure or failure of this type of bearing is that the large end of the tapered roller "gnaws the edge", that is, the large end of the tapered roller faces the grinding of the inner surface of the rib of the bearing race, or the The upper edge of the rib scrapes the large end face of the cone roller, or both, resulting in internal wear of the bearing, increased rotational resistance torque, heat generation, and increased power consumption, which affects normal operation and eventually leads to failure

[0003] Although this problem has long attracted the great attention of the rolling bearing industry (including design, manufacturing, research and other departments), the work carried out is all from reducing surface roughness, improving wear resistance, and performing elastohydrodynamic lubrication (or thin film) Lubrication) theoretical analysis and other aspects, but only achieved "knowledge" and "treatment of the symptoms", but could not solve the problem fundamentally

Today, friction, wear, heat, load and speed, reliability, and life of this type of bearing still exist, which limit the performance of this type of bearing and affect the application of this type of bearing. It also reduces its ability to support the development of the applied industry

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