| 摘要 |
<p>The hydraulic system is for supplying the operating hydraulic equipment of an agricultural tractor, with a hydraulic source, which feeds the required feed flow only when the leads are connected in. When the leads are not connected in, to reduce output losses and over-loading of the system, the hydraulic supply is automatically regulated back to a very small hydraulic flow. With a constant pump as hydraulic supply, a metering orifice is fitted in the pressure line and in parallel with this is an off-flew valve which is controlled by the pressure difference. A servo mechanism is fitted to the setting component of the off-flew valve which is controlled by of the metering orifice and is acted upon and influenced by the pressure behind this component.</p> |
