Composite Magnetic Circuit Double Permanent Magnet Electromagnet and Composite Magnetic Circuit Double Permanent Magnet High Speed Solenoid Valve

摘要

Disclosed are a composite magnetic circuit double-permanent magnet electromagnet and a composite magnetic circuit double-permanent magnet high-speed solenoid valve. The solenoid valve comprises a valve rod (1), an armature (2), a snap ring (3), a wide permanent magnet (4), an iron core (5), a coil (6), a narrow permanent magnet (7), a coil bobbin (8), a fixed nut (9), a hydraulic damping assembly (10), an initial air gap adjusting ring (13), a shell (14), a low pressure cavity (15), an armature reset spring (16), a base (18), an armature lift adjusting block (20), a limit ring (21) and an armature lift adjusting block fixed nut (22). This structure can effectively reduce the driving current of the solenoid valve, lowers the power consumption of the solenoid valve and the heating value of the coil, and raises the speed of release of the armature; and meanwhile, this structure can reduce the degree of collision during armature pickup and also oscillation when the valve is turned on, improve the precision of control over oil injection, reduce damages to limiting devices, enhance the economical efficiency of diesels and reduce emissions.