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The Cummins generator set work principle

2019-02-15 10:04:41

Cummins series diesel generators are widely used in daily life and work. It can provide temporary power supply or main power supply. So how does Cummins generator work? Here is a simple answer for you

In the cylinder of diesel generating unit, the clean air filtered by air filter is fully mixed with the high-pressure atomized diesel fuel injected from the injector. Under the pressure of the piston of diesel generating unit, the volume is reduced and the temperature rises rapidly, reaching the ignition point of diesel fuel. Diesel oil is ignited, the mixture burns violently, the volume expands rapidly, and pushes the piston down. It is called "work". The cylinders of diesel generating units work in a certain order, and the thrust acting on the piston turns into the force driving the crankshaft to rotate through the connecting rod, thus driving the crankshaft to rotate. The diesel generator thus completes a working cycle.

With the repetition of work cycles one after another, the diesel generating set runs continuously. The control core of diesel engine is to regulate and stabilize the speed by controlling the injection pump, which is generally divided into mechanical speed regulation and electronic speed regulation. The electronic governor adopts double closed-loop control, uses speed sensor to detect the speed of diesel engine, converts the test result into proportional electric signal, compares it with the given standard speed signal, obtains the deviation signal, and then adds it to the position feedback signal of the actuator of diesel generating set. The synthesized signal is used as the input signal of the actuator action, and the position of the fuel injection pump rod of diesel generating set is controlled by using the synthesized signal as the input signal of the actuator action. To adjust the oil supply, so as to achieve the goal of speed regulation and speed stabilization. At present, foreign diesel engines also use advanced engine "EFI" control technology, which has excellent performance in load characteristics, fuel saving, environmental protection emissions and noise reduction. Active power regulation of generating units is the regulation of the speed of diesel generators.

Diesel generator set is composed of internal combustion engine and synchronous generator. The maximum power of internal combustion engine is limited by mechanical load and thermal load of components. It is called rated power. The rated power of AC synchronous generator refers to the rated power output under rated speed and long-term continuous operation. The rated power of diesel engine set is usually output with synchronous alternator. The ratio between rated power is called matching ratio.

Diesel generating unit is a type of AC power supply equipment of self-contained power station. It is a small independent power generating equipment, which uses internal combustion engine as power and drives synchronous alternator to generate electricity. If the brushless synchronous alternator is coaxially installed with the crankshaft of the diesel engine, the rotation of the diesel generator set can be used to drive the generator's rotor. Using the principle of electromagnetic induction, the generator will output the induced electromotive force, and the current will be generated through the closed load loop.

As a small-scale power generation equipment, diesel generating units use diesel oil as fuel and diesel engine as prime mover to drive generators to generate electricity. The unit is generally composed of diesel engine, generator, control box, fuel tank, starting and control battery, protection device, emergency cabinet and other components. Diesel generating unit is a non-continuous operation power generation equipment. If it runs continuously for more than 12 hours, its output power will be less than 90% of the rated power. If the user needs a long period of uninterrupted use, it is necessary to configure commonly used generators, that is, the unit should take into account the power decline of long-term units.

.More questions about the work principle of Cummins generators are Welcome to contact us with service@hengfha.com


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