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Definition of bearings in the construction machinery industry

In the construction machinery industry, the definition and core functions of ‌ bearings ‌, based on the general mechanical definition, further emphasize their special performance requirements under high loads, strong impacts and complex working conditions:

I. General Definition

Bearings are core components that support the rotating parts or linear motion components of machinery. Their core functions include:

Youdaoplaceholder0 Supporting rotating body ‌ : Bears the radial/axial loads of the moving parts of the equipment to ensure operational stability.

Youdaoplaceholder0 Reduce frictional resistance ‌ : By converting sliding friction into rolling friction through rolling elements (balls, rollers, etc.), energy loss is reduced.

Youdaoplaceholder0 Ensure rotational accuracy ‌ : Maintain the accuracy of the movement trajectory of mechanical equipment under high speed or heavy load.

Ii. The Particularity of the construction Machinery field

In light of the working conditions of construction machinery (such as excavators, cranes, shield machines, etc.), bearings must meet the following additional requirements:

Youdaoplaceholder0 High load-bearing capacity ‌ : capable of withstanding heavy loads, strong vibrations and impact loads, such as the main bearings of shield machines needing to support a thrust of thousands of tons.

Youdaoplaceholder0 Harsh environmental adaptability ‌ : Resistant to dust, mud water, high and low temperatures and other working conditions, commonly designed with sealed type or special coating.

Youdaoplaceholder0 Long service life and high reliability ‌ : The equipment has a high demand for continuous operation, and the bearings need to have fatigue resistance and wear resistance (such as using carburized steel or special heat treatment processes).

Iv. Core Directions of Technological Development

Construction machinery bearings are evolving towards ‌ high precision (P4/P2 grade) ‌, ‌ integrated sensing functions ‌ (real-time monitoring of load and temperature), and ‌ lightweight composite materials ‌ applications to enhance energy efficiency and intelligence levels.

Summary: Construction machinery bearings are shock-resistant and highly reliable transmission components specially designed for heavy equipment. Their performance directly affects the service life and operational safety of the equipment. Therefore, the selection should be made by comprehensively considering the load, environment, and precision requirements