A hydraulic pump is shown in the following Figure, flow rate is 25 L/min, the diameter of suction pipe is 25mm, and the suction port of pump is higher than the oil surface of tank, the height is h, Kinematic viscosity of oil is 30x10 m²/s, density of oil is 900kg/m³. Only the pressure loss along the straight suction pipe with length his 75 considered, if the vacuum degree at the inlet of pump is not bigger than 4500Pa (2=- R₂ a = 2, g=9.8) (1) Calculate the flow velocity in the suction pipe; (2) Judge the flow state in suction pipe; (3) Calculate the pressure loss along the straight suction pipe; (4) Calculate the oil absorption height h.
A hydraulic pump is shown in the following Figure, flow rate is 25 L/min, the diameter of suction pipe is 25mm, and the suction port of pump is higher than the oil surface of tank, the height is h, Kinematic viscosity of oil is 30x10 m²/s, density of oil is 900kg/m³. Only the pressure loss along the straight suction pipe with length his 75 considered, if the vacuum degree at the inlet of pump is not bigger than 4500Pa (2=- R₂ a = 2, g=9.8) (1) Calculate the flow velocity in the suction pipe; (2) Judge the flow state in suction pipe; (3) Calculate the pressure loss along the straight suction pipe; (4) Calculate the oil absorption height h.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:A hydraulic pump is shown in the following Figure, flow rate is 25 L/min, the diameter
of suction pipe is 25mm, and the suction port of pump is higher than the oil surface of
tank, the height is h, Kinematic viscosity of oil is 30×10m²/s, density of oil is
900kg/m³. Only the pressure loss along the straight suction pipe with length his
75
considered, if the vacuum degree at the inlet of pump is not bigger than 4500Pa (λ =
R₂
a = 2, g=9.8)
(1) Calculate the flow velocity in the suction pipe;
(2) Judge the flow state in suction pipe;
(3) Calculate the pressure loss along the straight suction pipe;
(4) Calculate the oil absorption height h.
1
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