| 摘要 |
A high-pressure pump (HP), especially developed for pumping of abrasive media like drilling mud and cement slurry, is disclosed. The pump comprises reciprocally acting diaphragm pumps (MP) that are driven by hydraulic power generated by a hydraulic power pack (not shown), and each diaphragm pump (MP) includes a respective pump chamber (A, B) and at least two valves (V1, V2 and V1', V2') on the pumping side. The hydraulic power pack (not shown) drives a hydraulic motor (HM) with a substantially constant displacement volume corresponding to twice the stroke volume of each pump chamber. The motor (HM) is in direct hydraulic communication (P) with each pump chamber (A, B) via respective pressure controlled flow regulating valves that are controlled by a synchronizer (CS) connected to the hydraulic motor (HM).
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