Hardware knowledge base: "rolling bearings"

definition

Rolling bodies are used for rolling motion between parts that are subjected to load and move relative to each other.

Rolling bearings are precision mechanical components that reduce the frictional losses by converting the sliding friction between the operating shaft and the shaft seat to rolling friction. Rolling bearings generally consist of outer rings, inner rings, rolling elements and cages.

composition

Rolling bearings generally consist of inner rings, outer rings, rolling elements and cages. The inner rings of the four-part group cooperate with the shaft and rotate with the shaft; the outer ring functions with the bearing seat to support; the rolling elements are supported by The cage distributes the rolling elements evenly between the inner ring and the outer ring. The shape and quantity of the cage directly affect the performance and life of the rolling bearing. The cage can evenly distribute the rolling elements, prevent the rolling elements from falling off, and guide the rolling elements to rotate. Lubricate.

effect

The rolling bearing is easy to use and maintain, reliable in operation, good in starting performance, and has high bearing capacity under moderate speed. Compared with the plain bearing, the radial dimension of the rolling bearing is larger, the vibration-reducing ability is lower, the life at high speed is low, and the sound is louder. The structure of the structural rolling bearing consists of parts

1. Outer ring - installed in the bearing seat hole, generally does not rotate 2. Inner ring - mounted on the journal, rotates with the shaft

3. Rolling elements - the core components of rolling bearings

4. Cage - separate the rolling elements evenly to avoid friction

At present, lubricants are also considered to be the fifth largest part of rolling bearings, which mainly play the role of lubrication, cooling, cleaning, etc.

Basic Features

advantage

1 Low frictional resistance, low power consumption, high mechanical efficiency, easy to start.

2, the standardization of size, interchangeability, easy installation and removal, easy maintenance.

3, compact structure, light weight, smaller axial size.

4, high precision, high speed, low wear, long service life.

5. Some bearings have self-aligning properties.

6, suitable for mass production, stable and reliable quality, high production efficiency.

Shortcomings

1, noisy.

2, the bearing seat structure is more complex.

3, the cost is higher. Classification of rolling bearings.