套筒导向结构使得阀芯在运动过程中保持稳定的轴向位置，减少因偏移或振动而引起的不稳定性，能够提供较高的控制精度和稳定性。

The sleeve guide structure keeps the valve core in a stable axial position during movement, reducing instability caused by displacement or vibration, and providing high control accuracy and stability.