2, displacement and flow (1) displacement per revolution V hydraulic pump hydraulic motor, the volume of liquid discharged by sealed volume change calculated geometry called pump displacement. Displacement hydraulic pump can be adjusted is called a variable pump; pump displacement can not be adjusted is called a metering pump. (2) Theoretical Theoretical flow refers to the flow rate at the leakage flow rate of the hydraulic pump without considering the conditions of sale of the hydraulic motor, the liquid volume discharged per unit time. If the displacement of the hydraulic pump is V, its spindle speed detecting n hydraulic motors, the hydraulic pump as the theoretical flow qt qt = Vn where V is the displacement of the hydraulic pump (m3 / r), n is the spindle speed ( r / s) (3) qt pump actual flow conditions in a particular volume of liquid discharged per unit time is called the actual flow rate, which is equal to the theoretical flow qt minus leakage and compression flow ql loss after that q = qt a ql (4) qn nominal flow under normal operating conditions hydraulic motors overhaul, the test standards (such as at rated pressure and rated speed) must ensure that traffic. Machinery loss of mechanical loss refers to the loss of hydraulic torque. It is equal to pump large theoretical torque Tt and the actual input torque T ratio, set the torque loss of Tl, the mechanical efficiency of the hydraulic pump (2) hydraulic pump power 1) input power input power means acting hydraulic mechanical power on the pump shaft, when the input torque Ti, angular velocity ω = Tiω2) output power P means differential pressure Δp output power and output flow pump during operation of the actual suction pressure of the oil port between q product, namely P = Δpq (3) the overall efficiency of the overall efficiency of the hydraulic pump hydraulic pump is the actual output to its input power of the hydraulic motor maintenance, hydraulic motors, hydraulic preferred by the Jinan Jing Jing Chong Chong Hydraulic Machinery Limited. Jinan Jing Chong Hydraulic Machinery Co., Ltd. (www.jnjcyy.com) (www.jnjcyy.com) strong, credible, in Jinan, Shandong mining machinery industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead crystal create hydraulic and you hand into the brilliant, for a better future!