Electromechanical switching control mechanism of double-pulse speed governor

Abstract

The invention discloses an electromechanical switching control mechanism of a double-pulse speed governor. The mechanism is used for automatically switching the electronic control of the speed governor to mechanical control when the electronic control part breaks down. Under the normal circumstance, the control current of electromagnet in an actuating mechanism is increased when an diesel engine load is increased and speed is lowered; a control valve moves downwards to cause high-pressure oil to flow below a servo piston; the left end of a switching lever is connected with a reset piston by ahinge pin to move downwards to cause the main control valve to move downwards; and therefore, a power piston moves downwards and fuel is added so as to drive an output shaft to rotate towards fuel adding direction to improve regulation speed. When the electronic control part of the speed governor loses effect after failing and the revolving speed of the diesel engine is lowered to be lower than 5% of the normal speed set by the speed governor, the switching lever and a slide valve are completely separated without contacting; at the time, a high-response electromagnetism servo mechanism does not take effect; and the revolving speed of the diesel engine is controlled by the mechanical part of the speed governor.

Description

technical field [0001] The invention belongs to the field of diesel engines, and in particular relates to an electromechanical switching control mechanism of a double-pulse governor suitable for a series of diesel engines with a power of about 5000kW. Background technique [0002] With the rapid development of electronic technology, the governor for high-power diesel engine has developed to today, and great changes have taken place. From the earliest purely mechanical governors and hydraulic governors, electronic governors and electro-hydraulic governors are commonly used today. [0003] The speed sensing mechanism, control mechanism and actuator of the mechanical speed governor are all mechanical, which has the advantage of high reliability, but has the disadvantages of small working capacity and low precision of the speed governor, and is generally only used in small high-speed diesel engines. [0004] The speed sensing mechanism of the hydraulic governor adopts a mechani...

AI Technical Summary

Problems solved by technology

[0005] The control mechanism of the electronic governor adopts electronic method, and the actuator adopts mechanical method. It is characterized by high speed regulation accuracy, but small working capacity and poor reliability. It is generally used in small high-speed diesel engines with low reliability requirements.

Images