中文版
Description
Governor (Figure 1)
When the load is reduced, the speed of the drive shaft driven by the crankshaft increases, and the centrifugal force of the fly ball increases, pushing the speed rod to the right. Therefore, the rocker rotates counterclockwise at the center of point A and slides
The valve moves right, and the oil enters the right space of the server cylinder. At the same time, the left space of the cylinder is communicated with the low-pressure oil circuit through the oil hole, in which the oil is discharged. In the pressure difference
Under the action, the servo piston drives the fuel injection pump rack to the left to reduce the oil supply. When the speed returns to the original value, the slide valve also returns to the central position, and the adjustment process is over.
When the load increases and the speed decreases, the speed regulation process is carried out in the opposite direction.
From the above analysis, it can be seen that the centrifugal force generated by the governor fly ball is only used to push the spool valve, and the weight size of the fly ball can be made smaller. And hydraulic servo as amplifier
The force of the device can be amplified by choosing different sizes of servo pistons and different oil pressures according to needs.
However, in this kind of governor, because the induction element directly drives the slide valve, no matter which direction it moves, it is difficult to accurately return to the original position and close the oil hole. Thus make
The diesel engine speed is unstable and produces serious fluctuation.
In order to make the governor can be stably adjusted, a device should be added to the governor, whose role is to produce a reaction on the slide valve when the servo piston moves, so that it is balanced
The position moves in the direction, reducing the possibility of diesel speed fluctuations. This device is called a feedback mechanism.
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