| 摘要 |
A high-velocity water misting gun with a very high-speed radial inflow hydraulic turbine mounted on the same shaft with an axial flow air compressor wheel compressing air discharged at high velocities through an exhaust air nozzle. A preferred embodiment utilizes a plastic-metal hydraulic turbine wheel in which the plastic portion of the wheel other than blades is solidly anchored within a metal containing wheel. High pressure water drives the hydraulic turbine and provides water lubrication to high-speed bearings supporting a rotating shaft. The preferred embodiment utilizes hybrid bearings (part hydrodynamic, part hydrostatic) suitable for low-viscosity fluids such as water. In the preferred embodiment all of the water discharging from the hydraulic turbine wheel is channeled through a hollow shaft to a set of high-speed, shaft-mounted rotating orifices providing a fine water mist discharging into a high-velocity air flow provided by the axial-flow compressor. Thus, the entire water flow supplied to the misting gun is discharged into the high-velocity air flow discharging from an exhaust air nozzle so that no return hose is needed. Preferred embodiments utilize a manually operated ball valve to control water pressure supplied to the turbine; Increased hydraulic turbine power increases the power input into the compressor resulting roughly proportional air flow to water flow ratio.
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