Hydraulic pump displacement, flow, theoretical flow, actual flow and rated flow relationship
The displacement of hydraulic pump refers to the volume of oil discharged by a rotation of the pump shaft, which is expressed by V, in mL/r. The displacement of the hydraulic pump depends on the geometric size of the sealing chamber of the hydraulic pump, different pumps, because of different structural parameters, so the displacement is not the same. The flow rate of the hydraulic pump refers to the volume of the output oil of the hydraulic pump in a unit time, which is commonly expressed as q, and the unit is L/min.
Theoretical flow rate refers to the volume of oil output by the hydraulic pump in unit time without considering the leakage loss of the hydraulic pump. It is commonly expressed as qt, in L/min.
The relationship between displacement and theoretical flow is as follows:
qt=nV type n- a hydraulic pump speed; V - The displacement of hydraulic pump.
The actual flow rate refers to the consideration of the leakage loss of the hydraulic pump when the hydraulic pump in unit time
The actual volume of oil output. The actual flow rate of hydraulic pump is less than the theoretical flow rate because of the leakage loss in the work of hydraulic pump. That is.
q=qt-Δq, where Δq- 1 leakage. ´
Rated flow rate refers to the actual output flow rate when the pump is working at rated speed and rated pressure. The rated flow rate of the pump is indicated on the product sample or nameplate of the pump
