A Three-row Cylindrical Roller Combined Slewing Bearing with Split Structure

Abstract

The invention belongs to the technical field of bearing manufacturing and discloses a three-row cylindrical roller combined turntable bearing of a splitting structure. The combined turntable bearing comprises a combined outer ring (1), a first combined inner ring (2) and a second combined inner ring (3), which are of combined structures formed by lap joint of multiple split sectional steps; the amount of the split sections of the first inner ring is the same with that of the split sections of the second inner ring and is co-prime with that of the split sections of the outer ring; and included angles are formed between the split notch of the combined outer ring and the bus of a main thrust roller, between the split notch of the first combined inner ring and the bus of the main thrust roller, the split notch of the combined outer ring and the bus of an auxiliary thrust roller and between the split notch of the second combined inner ring and the bus of the auxiliary thrust roller. According to the three-row cylindrical roller combined turntable bearing of the splitting structure, the goals that bearing forging pieces can be cast in sections and bearing products can be put in a container for transportation in sections and assembled after arriving at a field are realized and the continuously developed use requirement of bearing load is met.

Description

technical field [0001] The invention belongs to the technical field of bearing manufacture, and mainly relates to a split structure three-row cylindrical roller combined slewing bearing. Background technique [0002] The load carrying capacity of the three-row cylindrical roller combined slewing bearing has a great relationship with its external dimensions. For bearings made of the same material, the larger the diameter and axial dimension, the stronger the load carrying capacity. Generally, a three-row cylindrical roller combined slewing bearing with an outer diameter of 5m can withstand a load with an axial force of 4000kN and an overturning moment of 50000kNm. With the advancement of engineering technology, the working load of marine cranes is increasing. At present, the axial force is 32,000kN and the overturning moment is 500,000kNm. The calculation shows that a three-row cylindrical roller combined slewing bearing with an outer diameter of 10m or more is required. , t...

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Problems solved by technology

[0003] There are great difficulties in processing and transportation of three-row cylindrical roller combined slewing bearings longer than 10m: firstly, the size and weight of forgings are too large, which exceeds the processing capacity of current forging equipment; secondly, inland bearing manufacturers cannot avoid using Forgings and finished bearings are transported by road transport. Due to the size and safety constraints of road width, tunnels, bridges, etc., it is basically infeasible to transport such super-sized slewing bearings by road.

[0004] On the one hand, it is driven by the technology required by practical applications, and on the other hand, it is constrained by the shortcomings of processing and transportation. If this contradiction is not resolved, it will not be able to meet the ever-growing market demand.

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