FLUID PUMP SYSTEM

To evaluate flow characteristics of a pump while suppressing power consumption.SOLUTION: A fluid pump system includes a pump, a first suction passage for introducing a first fluid into a pump, a second suction passage for introducing a second fluid having a specific gravity smaller than that of the first fluid into the pump, a discharge passage for discharging the fluid from the pump, a selector valve for selectively communicating one of the two suction passages with the pump, a state quantity sensor arranged in the discharge passage and measuring a state quantity of the second fluid, and a control device. At pressure-feeding of the first fluid, the control device allows the selector valve to communicate the first suction passage with the pump and operates the pump so that the first fluid flows into the discharge passage, and at evaluating flow characteristics of the pump, the control device allows the selector valve to communicate the second suction passage with the pump and operates the pump so that the second fluid flows into the discharge passage. A flow rate of the second fluid is measured by the state quantity sensor, and the flow characteristics of the pump at pressure-feeding of the first fluid can be evaluated on the basis of the flow rate of the second fluid.SELECTED DRAWING: Figure 2 【課題】電力消費を抑えながらポンプの流量特性を評価する。【解決手段】流体ポンプシステムは、ポンプと、第１流体をポンプに導入する第１吸入通路と、第１流体より比重の小さい第２流体をポンプに導入する第２吸入通路と、ポンプから流体を吐き出す吐出通路と、二つの吸入通路のいずれか一つを選択的にポンプに連通させるよう構成された切替弁と、前記吐出通路に配置された第２流体の状態量を測定する状態量センサと、制御装置とを備える。制御装置は、第１流体の圧送時には、切替弁で第１吸入通路をポンプに連通させ、ポンプを作動させて第１流体を吐出通路に流入させ、ポンプの流量特性の評価時には、切替弁で第２吸入通路をポンプに連通させ、ポンプを作動させてり第２流体を吐出通路に流入させ、状態量センサで第２流体の流量を計測し、この第２流体の流量に基づいて第１流体を圧送する際のポンプの流量特性を評価するよう構成される。【選択図】図２