There are two types of manually operated reciprocating pumpsโthe single-action and the double-action. The single- action pump provides flow during every other stroke, while the…
The term reciprocating is defined as back-and forth motion. In the reciprocating pump it is this back-and-forth motion of pistons inside of cylinders that provides…
Screw pumps for power transmission systems are generally used only on submarines. Although low in efficiency and expensive, the screw pump is suitable for high…
The lobe operation as pump uses the same principle of the external gear pump described previously. The lobes are considerably larger than gear teeth, but…
Another design of internal gear pump is illustrated in figures 4-5 and 4-6. This pump consists of a pair of gear-shaped elements, one within the…
This pump is illustrated in figure 4-2, view B. The drive gear is attached directly to the drive shaft of the pump and is placed…
The helical gear pump (fig. 4-4) is still another modification of the spur gear pump. Because of the helical gear design, the overlapping of successive…
The herringbone gear pump (fig. 4-3) is a modification of the spur gear pump. The liquid is pumped in the same manner as in the…
The spur gear pump (fig. 4-1) consists of two meshed gears which revolve in a housing. The drive gear in the illustration is turned by…
Piston type motors can be in-line-axis or bent-axis types. (1) In-Line-Axis, Piston-Type Motors. These motors (Figure 4-15) are almost identical to the pumps. They are…