
University of Minho
Department of Mechanical Engineering
MIEMEC | Integradora VIII
Trapezoidal Rotary Valve

Sliding the Trapezoidal Valve
In order to have a better idea how the valve intake area changes when it slides along its path, as it is presented in Figure 1,
it is necessary to use the equations below, but before that it is necessary to know that it starts from one edge of the cylinder entrance to the other,
-
Before achieving the center
(1)
-
After crossing the center
(2)
Introducing the equations in Excel,




Figure 1. Sliding the trapezoidal valve along its path
Graph 1. Trapezoidal valve intake area changing its path