Design and analysis on the flow fluctuation of a new horizontal space multiphase crankshaft pump

Abstract

In civil aviation ground deicing system, the traditional reciprocating pump is often used as the power supply device to ensure the physical and chemical properties of high viscosity deicing fluid. The traditional reciprocating pump exist the problem of flow fluctuation. A new horizontal space multiphase crankshaft pump is proposed to suppress the flow fluctuation. The new type of pump adopts segmented crankshaft: each crank pin on the crankshaft drives two connecting rods simultaneously. The connecting rod drives the pistons distributed on both sides of the crankshaft to achieve linear reciprocating motion. Three sections of the crank pin are arranged by 120° phase space circular, and this kind of crankshaft implements multiple phase coupling of piston movement. The hydraulic cylinder adopts the horizontal layout, so the machine structure presents spatial symmetry. A mathematical model of two connecting rods driven by crankpin is established for the new type of pump. The kinematics equation of the piston is solved by the analytical method and then the flow rate of the pump is calculated. In contrast with the experimental data, the new pump can effectively reduce the flow fluctuation.

Keywords

• pistons
• viscosity
• rods (structures)
• shafts
• kinematics
• design engineering
• pumps
• horizontal space multiphase crankshaft pump
• flow fluctuation
• segmented crankshaft
• crank pin
• connecting rods
• connecting rod drives
• linear reciprocating motion
• 120° phase space circular
• crankshaft implements multiple phase coupling
• crankpin
• civil aviation ground deicing system
• traditional reciprocating pump
• high viscosity deicing fluid