How Fast Does Oil-Air Flow Travel in an Oil-Air Lubrication System?-Huashun Lubrication

How Fast Does Oil-Air Flow Travel in an Oil-Air Lubrication System?

Release time:

2022-04-15

The flow characteristics of oil and compressed air are essential to the performance of an oil-air lubrication system.

Unlike traditional lubrication methods, oil-air lubrication uses compressed air as a transport medium to deliver a small and continuous amount of lubricant to critical friction points.

Different Flow Speeds of Oil and Air

Inside an oil-air lubrication pipeline, lubricant and compressed air do not flow at the same speed.

The lubricant mainly moves along the inner wall of the pipeline, while compressed air flows at high speed through the center area.

Typical flow characteristics include:

Lubricant flow speed: approximately 20–125 mm/s along the pipe wall
Compressed air velocity: approximately 50–80 m/s in the pipeline center

The high-speed air stream carries the lubricant forward, forming a stable spiral oil film along the inner wall of the pipeline.

How Does Oil-Air Flow Deliver Lubricant?

During operation, compressed air continuously transports the lubricant through the pipeline.

The lubricant forms:

A thin and continuous oil film
Fine oil droplets at the outlet
A stable lubrication layer on the friction surface

This ensures that bearings and other components receive a continuous supply of fresh lubricant.

In special applications, the oil-air spray velocity can reach approximately 150–200 m/s, providing efficient lubricant delivery and enhanced cooling performance.