A series-parallel permanent magnet and electromagnetic hybrid excitation high-speed electromagnetic actuator with vibration reduction

Abstract

The present invention is to provide a series-parallel permanent magnet and electromagnetic hybrid excitation high-speed electromagnetic actuator with vibration reduction, which includes series permanent magnets, parallel permanent magnets, main magnetic poles of iron cores, auxiliary magnetic poles of iron cores, coils, guide sleeves, armatures, armatures Core, return spring, spring washer, the parallel permanent magnet is a radially magnetized magnetic ring, which is arranged between the main magnetic pole of the iron core and the auxiliary magnetic pole of the iron core, and below the coil, and the series permanent magnet is arranged between the main magnetic pole of the iron core and the iron core Between the auxiliary magnetic poles and above the parallel permanent magnets, guide sleeves, armature cores, return springs, spring washers are installed in the main magnetic poles of the iron core, and the end face of the guide sleeve near the working air gap is higher than the end face of the main magnetic poles of the iron core. The core is a cylindrical boss structure, a stepped hole is opened in the center of the armature, and the armature is sleeved on the small end of the armature core. The invention has the characteristics of strong electromagnetic force, high response, low power consumption and low rebound, and is suitable for the electric control fuel system of the diesel engine.

Description

technical field [0001] The invention relates to an electromagnetic actuator, in particular to a high-speed electromagnetic actuator for an electronically controlled fuel system of a diesel engine. Background technique [0002] With the development of diesel engine electronic control technology, the electronically controlled fuel injection system has gradually replaced the mechanical fuel injection control system and has become an important technology for diesel engine fuel injection control. At present, diesel engines are facing increasingly stringent emission regulations and lower fuel consumption requirements, and electronic control technology is an important means to meet these requirements. The high-speed electromagnetic actuator is an important component of the electronically controlled fuel injection system of the diesel engine. It can accurately and flexibly control the fuel injection timing, fuel injection quantity and fuel injection law through the opening and closi...

AI Technical Summary

Problems solved by technology

However, the high current increases the power consumption of the high-speed electromagnetic actuator, the heat generated by the coil increases, and puts forward higher requirements for the temperature characteristics of the coil and its sealing material, etc., and the safety reliability and life of the high-speed electromagnetic actuator decrease; in addition, the armature absorbs The closing and holding stage is the main working time period of the high-speed electromagnetic actuator, and the current action time is long, especially when the fuel system is in a large pulse width working state, the action time is longer, and the heat generated by the coil is greatly increased at this time. Current will greatly improve the safety and reliability of high-speed electromagnetic actuators, and at the same time speed up the release speed of the armature

In addition, in order to meet the high-response characteristics of the electronically controlled fuel system, the armature of the conventional high-speed electromagnetic actuator will collide violently with the valve seat or the limit device at a high speed when it is pulled in, resulting in large oscillations, which will affect the actual opening of the control valve. Or closing time, which will affect the control accuracy of fuel injection, and long-term work will cause damage to the valve seat or limit device, affecting the consistency and life of its work

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