Sliding slewing bearing

Abstract

The invention discloses a sliding slewing bearing which comprises a lower convex rotary disc and an upper rotary disc, wherein the upper rotary disc is arranged on the lower convex rotary disc. A connecting bolt is arranged between the upper rotary disc and the lower convex rotary disc and is used for integrating the upper rotary disc and the lower convex rotary disc, a central through hole is respectively arranged at the middle parts of the upper rotary disc and the lower convex rotary disc, a rotary disc is arranged in an annular groove formed between the upper rotary disc and the lower convex rotary disc, a plurality of threaded connecting blind holes are respectively arranged on the outer end face circumferences of the upper rotary disc and the lower convex rotary disc, and a plurality of mounting through holes are arranged on the outer circumference of the rotary disc. The sliding slewing bearing is simple to machine and assemble, saves machining and heat-treatment processes of a runner and a roller in a rolling bearing and has low machining cost. During rotating, a wear-resistant lubricating ring has large bearing capability, the rotary discs has low friction coefficient, does not need lubrication and maintenance operations and has reduced use cost. The sliding slewing bearing disclosed by the invention has higher bearing property, an anti-overturning moment, and self-lubrication property.

Description

technical field [0001] The invention relates to a slewing bearing, in particular to a sliding slewing bearing suitable for large bearings. Background technique [0002] Slewing bearings, also known as slewing bearings or super-large bearings, are new machine parts that have been gradually developed in the world with the development of the machinery industry in the past 40 years. It is an important force transmission element necessary for a machine that simultaneously bears radial load, axial load and overturning moment. With the rapid development of the main engine industry, slewing bearings have been widely used. In addition to supporting excavators, tower cranes, truck cranes and various types of cranes, it is also widely used in light industrial machinery, metallurgical machinery, medical machinery, industrial robots, tunnel boring machines, stackers and reclaimers, missile launchers, radar antenna seats, In the field of machinery such as rotating stages, it is called "...

AI Technical Summary

Problems solved by technology

Because the contact between balls, rollers and raceway is point contact and line contact, its performance of anti-shock and anti-vibration is poor, so rolling slewing bearings often suffer from raceway fatigue pitting, rolling body seizure or damage caused by external media. Early failure phenomena such as corrosion and wear

In the construction machinery industry, due to the complex manufacturing process of rolling slewing bearings, high price, and difficulty in replacement and maintenance, early failure of slewing bearings has become the main factor affecting the life of engineering equipment.

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