Main parameters considered in SINOBALER
The pressure of hydraulic pump
Working pressure p: Exit pressure when pump is working, it is depend on load.
Rated pressure ps : Under normal running condition, according to test standard, the highest pressure during continuous running.
Absorption Pressure: Entrance Pressure.
Pump delivery capacity, flow rate and volumetric efficiency
Delivery capacity V: In theory, the volume of fluid the pump delivered one circle. The unit is . It is depend on the dimension of the pump.
Average theory delivery capacity q t : In theory, the fluid volume delivered by pump in unit time.qt= n v , unit is m3/s or L/min.
Actual delivery capacity q : the actual fluid volume delivered by pump in unit time. In the exit of the pump, when pressure≠ 0, there is leakage, so q = q t–Δq.
Instantaneous theory delivery capacity qsh: each split second, the volume delivered by pump. Usually, the instantaneous theory delivery capacity is pulsant, means qsh≠q t。
Rated delivery capacity qs : Under rated pressure and rated rotate speed, the volume of the pump delivered.
Volumetric efficiencyηv:ηv= q /q t =（q t –Δq）/ q t = 1–Δq /qt=1-kp /nV K is leakage coefficient.
Pump power and efficiency
Input power P t: P t= Tω
Output power P: P = p q
The pressure of hydraulic pump
Working pressure p: Exit pressure when pump is working, it is depend on load.
Rated pressure ps : Under normal running condition, according to test standard, the highest pressure during continuous running.
Absorption Pressure: Entrance Pressure.
Pump delivery capacity, flow rate and volumetric efficiency
Delivery capacity V: In theory, the volume of fluid the pump delivered one circle. The unit is . It is depend on the dimension of the pump.
Average theory delivery capacity q t : In theory, the fluid volume delivered by pump in unit time.qt= n v , unit is m3/s or L/min.
Actual delivery capacity q : the actual fluid volume delivered by pump in unit time. In the exit of the pump, when pressure≠ 0, there is leakage, so q = q t–Δq.
Instantaneous theory delivery capacity qsh: each split second, the volume delivered by pump. Usually, the instantaneous theory delivery capacity is pulsant, means qsh≠q t。
Rated delivery capacity qs : Under rated pressure and rated rotate speed, the volume of the pump delivered.
Volumetric efficiencyηv:ηv= q /q t =（q t –Δq）/ q t = 1–Δq /qt=1-kp /nV K is leakage coefficient.
Pump power and efficiency
Input power P t: P t= Tω
Output power P: P = p q
Total efficiencyηp : ηp = P / P t= p q / Tω=ηvηm
ηm is torque efficiency.
Pump rotate speed
Rated rotate speed n s: Under rated pressure, the highest speed allowed in run-on time.
The highest rotate speed n max: Under rated pressure, the highest speed allowed in short time.
The lowest rotate speed n min: Normal running, the lowest speed allowed.
Rotate speed range: The speed between lowest speed and highest speed.
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ηm is torque efficiency.
Pump rotate speed
Rated rotate speed n s: Under rated pressure, the highest speed allowed in run-on time.
The highest rotate speed n max: Under rated pressure, the highest speed allowed in short time.
The lowest rotate speed n min: Normal running, the lowest speed allowed.
Rotate speed range: The speed between lowest speed and highest speed.
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