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The Collaborative International Dictionary
Injector

Injector \In*ject"or\, n.

  1. One who, or that which, injects.

  2. (Mach.) A contrivance for forcing feed water into a steam boiler by the direct action of the steam upon the water. The water is driven into the boiler by the impulse of a jet of the steam which becomes condensed as soon as it strikes the stream of cold water it impels; -- also called Giffard's injector, from the inventor.

    fuel injector, a device for actively injecting fuel into an internal-combustion engines by directly forcing the liquid fuel into the combustion chamber at an appropriate point in the piston cycle; -- an alternative to a carburetor, in which an air-fuel mixture is drawn in by the downward stroke of the piston.

Wiktionary
injector

n. Any of various devices that are used to inject something

WordNet
injector

n. a contrivance for injecting (e.g., water into the boiler of a steam engine or particles into an accelerator etc.)

Wikipedia
Injector

An injector, ejector, steam ejector, steam injector, eductor-jet pump or thermocompressor is a type of pump. There are two varieties of injector, non-lifting and lifting.

The non-lifting injector cold water input is fed by gravity. It uses the principle of induced current ( Impulse (physics)) to push water up to the boiler check valve. It avoids the premature boiling of feed water at very low absolute pressure, by avoiding the Venturi effect. The steam cone minimum orifice diameter is kept larger than the combining cone minimum diameter. The non-lifting Nathan 4000 injector used on the Southern Pacific 4294 could push 12,000 US gallons (45,000 L) per hour at 250 psi (17 bar).

The lifting injector uses the Venturi effect of a converging-diverging nozzle to convert the pressure energy of a motive fluid to velocity energy which creates a low pressure zone that draws in and entrains a suction fluid. After passing through the throat of the injector, the mixed fluid expands and the velocity is reduced which results in recompressing the mixed fluids by converting velocity energy back into pressure energy. The motive fluid may be a liquid, steam or any other gas. The entrained suction fluid may be a gas, a liquid, a slurry, or a dust-laden gas stream.

The adjacent diagram depicts a typical modern injector. It consists of a motive fluid inlet nozzle and a converging-diverging outlet nozzle. Water, air, steam, or any other fluid at high pressure provides the motive force at the inlet.

The Venturi effect is a particular case of Bernoulli's principle. Fluid under high pressure is converted into a high-velocity jet at the throat of the convergent-divergent nozzle which creates a low pressure at that point. The low pressure draws the suction fluid into the convergent-divergent nozzle where it mixes with the motive fluid.

In essence, the pressure energy of the inlet motive fluid is converted to kinetic energy in the form of velocity head at the throat of the convergent-divergent nozzle. As the mixed fluid then expands in the divergent diffuser, the kinetic energy is converted back to pressure energy at the diffuser outlet in accordance with Bernoulli's principle. Steam locomotives use injectors to pump water into the steam-producing boiler and some of the steam is used as the injector's motive fluid. Such steam injectors take advantage of condensation of the motive steam resulting from the mixing with cold feed water.

Depending on the specific application, an injector can take the form of an eductor-jet pump, a water eductor, a vacuum ejector, a steam-jet ejector, or an aspirator.

Injector (disambiguation)

Injector may refer to:

  • Injector or Steam injector, a pump-like device without moving parts
  • Jet injector, a medical hypodermic device
  • a type of welding and cutting torch in oxy-fuel welding and cutting
  • Sample injector, a device used in conjunction with injecting samples into high-performance liquid chromatography or similar chromatography apparati
  • Fuel injector, a device used in many modern vehicle engines
  • Injector Linux, a one floppy Linux system ( Lightweight Linux distribution)

Usage examples of "injector".

She scavenged four atropine autoinjectors out of four kits and put the empty foam cases and the leftover 2-PAM injectors in the Aerie.

The top of the core ascended past her eye level, and climbed steadily upward toward the deuterium injector valves.

Conlon would be finished with the deuterium injector in a few minutes, then would go below to help Stevens.

Gomez looked up and noticed Conlon was climbing down from the deuterium injector.

It housed two small tokamak fusion reactors and their associated support machinery, a tightly packed three-dimensional maze of tanks, cryostats, superconductor magnets, plasma inductors, pumps, electron injectors and high-voltage cabling.

I flipped the med with my nose so that its explosive injector sleeve faced up, then fell on my face, shooting the antivenin into my numb cheek.

It irritated her, yet without that armor with its constant hydrostatic pressure and automated biofoam injectors, John would have literally fallen apart by now.

Kelly bolts securing a metal panel over the injectors that controlled the nanoparticle plasma stream.

The fuel-metal flowed through the manifold and the peegee field drew a thin stream of pure U-235 into the injector again.

They get their kicks from their power with the injector and the psychochemicals and all that.

Ben Yulin the hypnotic injector system found in the Chang encoding below the fingernails.

Smaller versions, like the size of a dime or maybe up to a quarter, might show up in the injectors the robotic diagnostic equipment uses, either to administer stuff quick to the bloodstream or to attach monitors.

The medics would have to find a way to reuse their injectors, or stop giving allergy shots.

Then he turned and ran up the glittering data pathway leading to a tenuous connection of his program injectors, which were the bridge between the Matrix and his body.

We pulled out your stock fuel injection system and replaced it with Ford Motorsport GT-40 fuel injectors.