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Which Governor is Used in an Electric Generator


1. The function of the governor of diesel generator set

The function of the governor is to adjust the fuel supply automatically with the change of the external load of the diesel engine within the required speed range of the diesel engine, so as to keep the diesel engine speed basically stable.



2. Type of governor

A. According to the different classification of governor regulating mechanism, it can be divided into four types: mechanical type, hydraulic type, pneumatic type and electronic type.

(1) mechanical governor

The sensing element of the mechanical governor is a flying block or a flying ball, which directly pushes the actuator. Simple structure, reliable work, widely used in medium and small power diesel engines.

(2) hydraulic speed governor

The pressure governor generally uses the flying block as an inductive element to push the piston to operate the hydraulic server. This governor has small induction elements and strong versatility. A few series of dimensions can be used to meet the requirements of tens to ten thousand horsepower diesel engines. It has good stability, high adjustment precision and large driving force, and is easy to realize automatic control of diesel engine. But the structure is complex, the craft request is high, suitable for the high power diesel engine.

(3) Pneumatic governor

The moving governor uses the diaphragm to induce the change of the vacuum of the inlet pipe, and then to promote the actuating mechanism. The governor has simple structure and high sensitivity at low speed, but the power is decreased due to the throttle valve installed in the intake pipe. Therefore, it is only suitable for low power diesel engines.

(4) electronic governor (Mainly used in electric generator engine)

The electronic governor converts the change of diesel engine speed into the change of electric quantity, and controls the actuator after sampling and amplifying. This governor can adjust the fuel supply before the speed of diesel engine changes obviously, and obtain high adjusting precision, and realize parallel operation without difference.
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