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Air-side economizers also use outside air to condition spaces, but do so using fans, ducts, dampers, and control systems to introduce and distribute cool outdoor air when appropriate. An important component of natural ventilation is air change rate or air changes per hour: the hourly rate of ventilation divided by the volume of the space. For ...
Originally named Allen Manufacturing Company, the business produced hexagonal set screws and wrenches to fasten them. The terms "Allen wrench" (American English) and "Allen key" (British English) [3] are derived from the Allen brand name and refer to the generic product category "hex keys". W.G. Allen [4] filed the first related patent in 1909 ...
Damper winding. Bars and rings of the damper (amortisseur) winding of an AC generator (General Electric, early 20th century). Note the gaps in the cage along the quadrature axes. The damper winding (also amortisseur winding [1]) is a squirrel-cage -like winding on the rotor of a typical synchronous electric machine.
A regenerative shock absorber is a type of shock absorber that converts parasitic intermittent linear motion and vibration into useful energy, such as electricity. Conventional shock absorbers simply dissipate this energy as heat . When used in an electric vehicle or hybrid electric vehicle the electricity generated by the shock absorber can be ...
Magnetorheological damper. A magnetorheological damper or magnetorheological shock absorber is a damper filled with magnetorheological fluid, which is controlled by a magnetic field, usually using an electromagnet. [1] [2] [3] This allows the damping characteristics of the shock absorber to be continuously controlled by varying the power of the ...
A Stockbridge damper is a tuned mass damper used to suppress wind-induced vibrations on slender structures such as overhead power lines, [1] long cantilevered signs [2] and cable-stayed bridges. The dumbbell -shaped device consists of two masses at the ends of a short length of cable or flexible rod, which is clamped at its middle to the main ...
Allen-Bradley is the brand-name of a line of factory automation equipment owned by Rockwell Automation. The company, with revenues of approximately US $6.4 billion in 2013, manufactures programmable logic controllers ( PLC ), human-machine interfaces, sensors , safety components and systems, software, drives and drive systems, contactors ...
Harmonic balancer lower pulley on a four-cylinder engine. A harmonic damper is a device fitted to the free (accessory drive) end of the crankshaft of an internal combustion engine to counter torsional and resonance vibrations from the crankshaft. This device must be an interference fit to the crankshaft in order to operate in an effective manner.