A double arc helical gear pump rotor consists of a pair of meshing helical gears, which are used to transfer fluid from the inlet to the outlet of the pump. The mechanical characteristics of the rotor are crucial for the efficient operation of the pump. The fluid-structure coupling refers to the interaction between the fluid flowing through the pump and the structure of the rotor.
The mechanical characteristics of the double arc helical gear pump rotor under the influence of fluid-structure coupling can be affected in various ways:
1.Pressure distribution: The fluid pressure is not evenly distributed around the gear mesh, creating pressure differences on the gear surfaces. This can cause deflections and stresses in the gear teeth, affecting the gear meshing and the overall pump efficiency.
2.Vibration and noise: The interaction between the fluid and the rotor structure can cause vibrations and noise in the pump. This can be a result of pressure pulsations, flow-induced vibrations, or the dynamic response of the rotor structure.
3.Load-carrying capacity: Fluid-structure coupling can influence the load-carrying capacity of the gear teeth. The pressure distribution in the fluid film between the gear teeth can affect the load-sharing between the teeth, which in turn influences the overall stress distribution and load-carrying capacity of the rotor.
4.Lubrication and wear: Fluid-structure coupling also affects the lubrication conditions between the gear teeth. A proper film thickness is necessary to minimize wear and ensure efficient operation. Fluid pressure distribution, gear tooth deflections, and surface roughness can all influence lubrication conditions.
To analyze and optimize the mechanical characteristics of a double arc helical gear pump rotor under the influence of fluid-structure coupling, advanced numerical methods such as computational fluid dynamics (CFD) and finite element analysis (FEA) can be employed. These methods can help to simulate the fluid flow and rotor structure interaction, predict performance, and identify potential improvements in the pump design.