Electromagnetic servo mechanism of electro-hydraulic speed regulator

Abstract

The invention relates to an electromagnetic servo mechanism of an electro-hydraulic speed regulator, which comprises a connecting seat, a valve sleeve, a pilot valve plunger, a pressure regulating valve, a throttling screw plug, an electromagnetic coil assembly, a torsion spring plate and a torque motor beam, wherein the pilot valve plunger is provided with a convex shoulder and forms a control window with a notch of the valve sleeve, the pressure regulating valve and the throttling screw plug are arranged in the pilot valve plunger, and the electromagnetic coil assembly, the torsion spring plate and the torque motor beam are fixed on the connecting seat. The nozzle baffle is fixed to the torque motor beam, the reset spring and the horizontal adjusting spring are installed at the two ends of the torque motor beam, and the feedback lever mechanism is installed on the connecting base. The connecting seat is provided with a supply pressure oil hole, a servo control pressure oil hole, an oil pool oil hole and a connecting threaded hole. According to the mechanism, torsion of an iron core is caused by changing the current of an electromagnetic coil, a nozzle baffle at the end of a torque motor beam moves, a pilot valve plunger moves along with the nozzle baffle, and therefore a control window is opened, a supply pressure oil hole is communicated with a servo control pressure oil hole, or the servo control pressure oil hole is communicated with an oil pool oil hole.

Description

technical field [0001] The invention relates to the field of governors of diesel engines, in particular to an electromagnetic servo mechanism of an electro-hydraulic governor. Background technique [0002] The governor is a speed control mechanism of the diesel engine. The condition for the stable operation of the diesel engine at a certain speed is that the output power must be balanced with the external load, and the change of the external load will inevitably cause the corresponding change of the diesel engine speed. The output power of the diesel engine is directly related to the amount of fuel injected into the cylinder by the fuel injection pump; if the fuel supply of the fuel injection pump remains unchanged, the speed will increase when the external load decreases; when the external load increases, the speed will decrease. The function of the governor is to automatically increase the fuel supply of the fuel injection pump when the speed of the diesel engine decrease...

AI Technical Summary

Problems solved by technology

Electro-hydraulic governors have better performance than mechanical governors. The working principle of some existing electro-hydraulic governors is to adjust the opening of the control window for the lift of the slide valve through the centrifugal force generated by the rotation of the flying weight to realize the pressure oil. From the inflow or outflow of the power piston, due to the centrifugal force of the flying block rotation in the process of balancing the force of the spring, that is, in the process of adjusting the opening and closing of the sliding valve coupler control window, it is easy to reciprocate, causing the pressure oil in the power piston to repeatedly Inflow or outflow, manifested as the jitter of the output shaft of the governor, causing fluctuations in the speed of the diesel engine

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