Manufacturing Engineering

Internal gear pumps , like external gear pumps, move and pressurize liquid by the meshing and unmeshing of gear teeth. With an internal gear pump, a rotor having internally cut teeth meshes with and drives an idler gear having externally cut teeth. Pumps of this type usually have a crescent-shaped partition that moves the liquid […]

The progressing cavity (PC) pump in its most common design has a single threaded screw or rotor, turning inside a double-threaded stator (Figure 1.15). The stator is made of an elastomeric material, and the rotor has an interference fit inside the stator. As the rotor rotates inside the stator, cavities form at the suction end

In the flexible impeller pump , sometimes called a flexible vane pump, the rotor is made of an elastomeric material such as rubber. The blades of this “impeller” continuously deflect and straighten as they pass across a cam between the inlet and discharge ports. The flexing of the blades produces a vacuum that causes liquid

Stripped of all nonessential details, a centrifugal pump consists of an impeller attached to and rotating with the shaft and a casing that encloses the impeller. In a centrifugal pump, liquid is forced into the inlet side of the pump casing by atmospheric pressure or some upstream pressure. As the impeller rotates, liquid moves toward

There are many ways to classify pumps: according to their function, their conditions of service, materials of construction, etc. The U.S. pump industry trade association, the Hydraulic Institute, has classified pumps as shown in Figure . This classification divides pumps as follows: A. Principle of Energy Addition The first classification is according to the principle

Simply stated, a pump is a machine used to move liquid through a piping system and to raise the pressure of the liquid. A pump can be further defined as a machine that uses several energy transformations to increase the pressure of a liquid. The centrifugal pump shown in Figure illustrates this definition. The energy

Autoclaves are commercially available for various part sizes and process parameters. The diameter of autoclaves used for airframe manufacturing can reach 8 m or even more, and a length of more than 35 m. The temperature can reach more than 400 C (especially for thermoplastic applications with PEEK) and the pressure more than 30 bar,

In above , L means longitudinal (sheet production or rolling direction) and LT or T means the transversal direction. For the two letters T-L or L-T assigned to the individual material properties, the first letter is indicating the loading direction of the samples, and the second letter indicates the crack growth direction. If a is

From the sump reservoir under the crankshaft oil is drawn through a strainer into the pump or ball, valve that opens when the pressure in the oil exceeds the spring force acting on the valve seat . When the valve opens, a return drilling is uncovered and the excess oil flows through this to return

The cylinder head gasket has to form a gas-tight seal at the interface between the cylinder head and the cylinder bores. In addition, it must seal and separate the cooling water supply jacket and the oil supply and return drillings. Traditional head gaskets were constructed from copper and asbestos. Modern material technologies allow head gaskets