CAM FOR CONTROL OF COMBUSTION FUEL-TO-AIR RATIO

摘要

Optimum fuel-to-air ratio over the entire operating range of a boiler fuel burner is obtained by having a motor, which is driven in response to boiler temperature or pressure changes, operate a damper and fuel valves simultaneously. A cam and follower reposition the fuel valves coordinately with a directly driven damper. Means are provided to adjust the cam contour over its length so optimum fuel-to-air ratios prevail for all positions of the damper. The follower is positively engaged with the cam.