摘要: |
As hydraulics manufacturer Edbro puts it, "a hydraulic wet kit is the partially-completed system consisting of an oil tank, pump, valve, air actuation system, screw connectors, couplings and assembly materials. This hydraulic system only becomes functional when connected to a hydraulic slave (tipper, walking floor, ejector or tanker discharge equipment)". In practice, this distinction between the wet kit and the slave equipment is only relevant when a hydraulic-equipped tractor is not connected to a trailer, and it is best to think of them as a complete system. This is especially true in tightly integrated vehicles such as refuse collection vehicles and car transporters, which are completely reliant on their hydraulic systems. Martyn Wood is product support and technical director at the car transporter builder Transporter Engineering, based at Gosfield in Essex (pictured). The firm puts together its own wet kits, using a combination of off-the-shelf and custom components. The lift gear itself is also quite sophisticated: like a hydraulic crane, it uses double-acting rams fed via check valves (so they remain in place when the controls are not being used), while a specially machined rotary flow divider balances each side of the lift gear without the need for position sensors. |