| 摘要 |
The invention provides a solenoid valve and a series-type solenoid valve, and air invasion into a spring receiving chamber of a linear solenoid valve is prevented through a small-size and simple structure. A solenoid (14) and a spring (16) are respectively connected at two ends of a slide valve nested in a sleeve (12); an oil storage part (17) formed between an external peripheral surface of the sleeve (12) and an internal peripheral surface of a sleeve support hole (11a) of a valve body (11) is communicated with a spring receiving chamber (15) through a hole port (12f); and the oil storage part (17) is communicated with an atmosphere opening port (P1) at the upper part of the sleeve (12). Therefore, not only the spring receiving chamber is filled by using oil leaked from a pressure port (P5), but also oil in the oil storage part is prevented from falling from the atmosphere opening port due to gravity, and air is prevented from invading into the spring receiving chamber from the oil storage part. In addition, no additional large oil storage part with a high oil level is necessary, so the valve body is miniaturized. |
