Theory of Machines
What is Sliding Mesh Gearbox? Construction, Diagram & Working
Figure 1: Sliding Mesh Gearbox
Construction & Working of Sliding Mesh Gearbox
The sliding mesh gearbox consists of three shafts namely input shaft, output shaft and lay shaft. The input and output shafts are in line, whereas lay shaft is parallel to them and lies below them. The function of input shaft is to take power from engine and transmit to output shaft through a series of gears mounted on layshaft. The function of output shaft is to transmit power obtained from input shaft to the propeller shaft for onward transmission to road wheels. Schematic layout of sliding mesh gear box is shown in Figure 1.
What is Wilson Hartnell Governor? Working, Diagram & Construction
Wilson Hartnell Governor is a spring-loaded type of governor, in which, balls are connected by springs in tension. Here, two bell crank levers are pivoted at the ends of vertical and horizontal arms.
What is Pickering Governor? Working, Diagram, Construction & Applications
A Pickering governor consists of a spindle and three straight leaf springs (each consisting of a single leaf). These three identical leaf springs are symmetrically placed (i.e. at equal angular intervals) around the spindle.
What is Hartnell Governor? Working, Diagram & Construction
In Hartnell governor, movement of fly-balls is controlled by means of a spring. Therefore, Hartnell governor is also known as spring-loaded governor.
Construction of Hartnell Governor
Hartnell governor consists of a casing, in which, a pre-compressed spring of helical compression type is fitted so as to apply force on the sleeve.
What is Proell Governor? Working, Diagram, Construction & Applications
Proell governor is similar to Porter governor having central load at the sleeve. But, Proell governor differs from Porter Pivot governor in ‘size’ as well as ‘arrangement’ of fly-balls. Refer to Fig. 1.
Construction of Proell Governor
What is Double Block (Shoe) Brake? Working, Diagram, Construction & Applications
When a single block brake is applied to a rotating drum for braking action, an additional load is produced on shaft bearings due to normal reaction (RN). This leads to unbalanced situation. In such cases, this unbalanced load acting on the shaft may lead to bending of shaft. Hence, to overcome this drawback of single block brake, double block (shoe brake) is used. Refer Fig. 1.
Fig. 1: Double Block (Shoe) Brake.