How pneumatic starters work

When the engine starting sequence is initiated a rush of compressed air is released. This strikes the primary turbine wheel and causes it to rotate at high speed. As the air exits the first wheel it strikes each subsequent wheel causing each to turn. Eventually the wheels reach speeds of between 25 to 40 thousand rpm. This velocity is reduced by about 10:1 inside a planetary gearbox sitting just in front of the turbine mechanism.

Benefits of air starting

• Guaranteed start: Guaranteed to start any diesel engine up to 150 litres. Air starters operate at pressures from 3 to 30 bar so are flexible enough to suit any application. This also allows them to use an existing air supply.
• Performance in all conditions: Air starter motors are highly resistant to corrosion because of a cast iron casing and aluminium components. This makes them ideal for marine and offshore applications.
• Low maintenance: Developed as an easy to install, fit-and-forget solution, our starter motors are resilient against wear and damage, needing no lubrication. They are totally maintenance-free.
• Safe in hazardous areas: Pre-engaged hydraulic starters meet ATEX regulations for both gas and dust environments such as offshore, marine and mining.

1.Product Category:

2.Working Principle

AST600 Air Starter is comprise of power part and output part. The power part is vane pneumatic motor. When starting the diesel engine, the compressed air enter from pre-engagement air inlet hole of output part and push the output part and push the output gear to extrude forward, adjust automatically to ensure the correct engaging position. When the output gear reaches specified stroke, the compressed air is connected with air relay through pre-engagement air outlet hale. At this time, open main air circuit, the compressed air enter vane pneumatic motor part, and the motor starts to rotate which drive the diesel engine. After start-up o of diesel engine the said motor will overstep by overstep clutch. If the air source is cut off the output gear will draw back, the whole start-up process is completed.

3.Technical Characteristic

This product is used under the working air pressure no more than 0.8MPa. maximum power 17KW. The main technical parameters at different air pressure are as below: