VVT中置式电磁阀孔槽结构参数对电磁力特性的影响

Analysis on effects of orifice and slot structure parameters of MID-VVT on electromagnetic force performance

VVT中置式电磁阀的阀芯和基座处开设的孔槽能减小机油的压缩阻力和阀芯的摩擦力,但会影响电磁力特性。针对该问题,利用建立的电磁阀三维模型开展了数值模拟,分析了孔、槽结构参数对平均电磁力、电磁力标准差的影响。结果表明:平均电磁力随基座排油孔直径、钢球槽直径、圆角半径、深度的增大而降低,电磁力标准差随基座排油孔直径的增大而增大,随钢球槽深度的增加而波动下降。其中,基座排油孔直径和钢球槽直径、圆角半径、深度对平均电磁力的影响较大,基座排油孔直径和钢球槽直径、深度对电磁力标准差的影响较大。

The spool of the VVT center-mounted solenoid valve and the holes in the base can reduce the compression resistance of the oil and the friction of the spool, but it will affect the electromagnetic force characteristics. Aiming at this problem, numerical simulation is carried out by using the established three-dimensional model of solenoid valve, and the influence law of hole and slot structure parameters on average electromagnetic force and standard deviation is analyzed. The results show that the average electromagnetic force decreases with the increase of the base oil drain hole diameter, steel ball groove diameter, fillet radius and depth. The standard deviation of electromagnetic force increases with the increase of the base oil drain hole diameter. As the depth of the ball groove increases, the fluctuation decreases. Among them, the base oil drain hole diameter and the steel ball groove diameter, fillet radius, and depth have a greater impact on the average electromagnetic force, while the base oil drain hole diameter and the steel ball groove diameter and depth have a greater impact on the standard deviation of the electromagnetic force.