Introduction

 This tutorial uses Water pump as an example to teach the kinematic and dynamic analysis using Solid Edge and Dynamic Designer. 

The mechanism used in this example is simple Slider-Crank Mechanism. Slider-Crank Mechanism consists of four links with one being designated as frame (or ground). It is connected by three pin joints and one sliding joints.

 As designated in the figure, there are four links link 1, link 2, link 3 and link 4. Link 2 acts as a crank. Link 3 acts as connecting link, link 4 is the slider and link 1 is ground.

The following table summarizes the joints.

  Degrees of Freedom:  According to Gruebler’s equation,

  where   F = Degrees of Freedom (DOF)

            n = total number of links in a mechanism

             = total number of primary joints (pins or sliders)

             = total number of higer-order joints(cams or gears)

we have,

F          =          3(4-1) – 2(3+1) – 0

            =          9 – 8 - 0

                        =          1.

 Hence, Slider Crank mechanism has 1 DOF. In other words, Slider Crank mechanism is constrained or fully operated with one driver.

Click here to get the compressed (Solid Edge) part files.