Describe

EG is an electro-hydraulic actuator, which can receive signals of 0-200mA and proportional current signals output by standard PG servo.

Forward or reverse direction

Actuators are divided into forward and reverse types.

Two. When the control current of the forward actuator increases, the oil supply increases, and it is executed in the reverse direction.

When the control current increases, the oil supply decreases.

The reverse EG actuator is usually used on the mechanical (ball-head) governor, and automatically enters the mechanical (ball-head) backup governor when it is interrupted or has no electric control signal.

Installation requirements

When the governor is installed on the seat cushion of the accessory of the prime mover, a gasket must be installed, and the recommended thickness of the gasket is 0.81mm (0.032 inch). This washer can eliminate the error of the installation surface and prevent the oil leakage between the governor and the engine driving part. Install the governor on the mounting seat of the accessory of the prime mover, and pay attention to the correct meshing length between the governor and the drive shaft. Ensure that the drive shaft is not binding and there is no excessive lateral load on the drive shaft assembly. Ensure that the engagement is tight, and there is no need to use force when assembling the two shafts. The governor must be installed in a vertical position. Non-concentric or end-face runout driving will lead to unsmooth operation of the governor and shorten its service life. In addition, the drive should be smooth, and uneven drive will damage the oil seal and bearing of the governor.

Connecting rod connection

Align the connecting rod between the governor and the oil pump or valve to eliminate constraints and excessive backlash. Angular position of governor/terminal shaft

The relationship between setting and fuel control position must be adjusted according to the engine manufacturer's specifications. The connecting rod connection cannot limit the governor from reaching the maximum fuel position or the stop position.

During the important pause, the connection should not be disconnected, and the connecting rod should not be too heavy to prevent the response of the speed regulator from being affected. The connecting rod should have wear resistance.

Connecting rod connection is the main cause of many intuitive governor problems, so it is very important to design and install the appropriate connecting rod between the engine and the governor output.

When the fuel control is at idle speed, the position of the fuel control connecting rod must be set at least 15% from the minimum oil level position to the full stroke of the governor (A and D, see Figure 2-1). This minimum setting is necessary because the position of the cut-off port is compensated (if so assembled).

Using as many governor strokes as possible, the maximum governor stroke can improve the stability of speed regulation, and the connecting rod connection designed in this way can make the output of the governor and the output of the corresponding engine roughly linear.

Woodward EG-B10 Hydraulic Actuator Bulletin 37708E Manual

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