WATER BLASTING SYSTEM WITH IMPROVED PRESSURE CONTROL AND METHOD

摘要

The high pressure system (10) is provided for outputting pressurized fluid to a source, such as a blasting gun (26). The system includes mechanical transmission (14) interconnecting a diesel engine (12) with a positive displacement pump (20). A programmable controller (30) is provided for receiving signals from a pressure transducer (34) and for controlling operation of an engine controller (44), a clutch controller (42), and a transmission shifter (46) to obtain the desired fluid pressure level output from the pump. The controller preferably communicates by wireless transmission technology, so that the controller (30) may be exterior of a sound abatement enclosure (28) surrounding the engine (12) and the transmission (14). Controller (30) may be operated to automatically shift the transmission in response to fluid pressure output from the pump. Alternatively, controller (30) may receive input instructions from the operator to shift the transmission to a desired gear. In either case, the controller (30) automatically regulates engine speed (rpm) and engages and disengages the clutch for automatically shifting the transmission.