Aluminum based alloy sliding bearing bush

Abstract

The invention discloses an aluminum-based alloy sliding bearing bush including a fixed boss, bearing bush bodies, outer oil grooves, oil through holes and inner oil grooves, the fixed boss is connected with the bearing bush bodies, the outer oil grooves are connected with the bearing bush bodies and the oil through holes, the oil through holes are connected with the bearing bush bodies and the inner oil grooves, the inner oil grooves are connected with the bearing bush bodies, eight outer oil grooves are uniformly distributed along a circle of the bearing bush bodies, eight inner oil grooves are uniformly distributed along an inner circle of the bearing bush bodies, and the arrangement positions are symmetric to the positions of the outer oil grooves, the inner oil grooves and the outer oil grooves are connected through the oil through holes, the bearing bush bodies are prepared from aluminum as a base by addition of proper amount of Cu, Mg, Ni, Sn, Ti, B and other alloy elements, the bearing bush bodies have equivalent tensile strength and elongation with tin bronze, the hardness reaches up to 70HBS, and is higher than that of the tin bronze by more than 8HBS, the density is 2.9g / cm<3>, and the friction coefficient in condition of lubrication is reduced to 0.004. The aluminum-based alloy sliding bearing bush has the advantages of being reasonable in structure, simple and durable, convenient in installation, economical, practical convenient in operation, good in working environment, safe, reliable and the like.

Description

technical field [0001] The invention relates to an aluminum-based alloy sliding bearing shell, which is especially suitable for a lower sliding bearing device of a spiral slagging machine for mechanically removing slag from a boiler in a thermal power plant. Background technique [0002] The wet slag removal system of the thermal power plant is equipped with a spiral slag machine at the lower part of the boiler furnace. The high-temperature slag falling from the furnace is cooled by cooling water, and then taken out by the spiral slag machine, crushed by the slag crusher, and then falls into the slag ditch and flows into the slag. pulp pool. [0003] The lower body device of the wet screw slagging machine used in most occasions, that is, the lower bearing bush of the screw slag machine is made of nodular cast iron sleeve or non-ferrous metal sleeve, which is required to be wear-resistant and well sealed to ensure normal operation in slag water immersion , no dripping of sla...

AI Technical Summary

Problems solved by technology

[0003] The lower body device of the wet screw slagging machine used in most occasions, that is, the lower bearing bush of the screw slag machine is made of nodular cast iron sleeve or non-ferrous metal sleeve, which is required to be wear-resistant and well sealed to ensure normal operation in slag water immersion , no dripping of slag water, the service life of the lower bearing is not less than 20,000 hours, and it is easy to overhaul and maintain. However, due to the existence of many uncertain factors in production, installation and operation, this situation often becomes a hidden accident point. Cause slag to accumulate, if not repaired in time, it will affect the operation of the unit

Images