Research Of The Rotor Profile And Analysis Of The Gap On The Inside Circulation Piston Pump

The inside circulation piston pump is an excellent new rotor pump,but the research work is seriously lagging behind in China and has not yet to resolve the design problem of the internal and external rotor profile.The paper does some theoretical,motion analysis and simulation of structural innovation research about rotor profile, structure and gap size in the inside circulation piston pump. At last,the calculation method of the outside rotor profile is presented. The studying includes the main experiment:1. First a type of the inside circulation piston pump was developed in this paper, and then its structural feature and operational principle were introduced.2. The research of flow characteristics. Refer internal gear pump flux calculation formula, the inside circulation piston pump's flow formula for the actual flow formula,the transient flow formula and flow pulsatility index were inferred.3. The research of the rotor profile. According to the motion law of the inside circulation piston pump rotor, and based on the tooth profile line of the inside rotor was circular arc,established the moving coordinate system.Assumed that the outside rotor was fixed and the inside rotor did the relative movement, the calculation formula of the outside rotor profile are went out for the first time.It lays the theory foundation and fills-up the theory gap of rotor profile design of the inside circulation piston pump. Using an actual design example and CAXA software,the theory curve picture of the tooth profile line of the outside rotor is shown.Through using Cosmosmotion to do motion simulation analysis,the validity of the tooth profile line equation and calculation formula were verifide.This line was good at solving interference problem between the inside and outside rotor, so that pump is running more stable, lower noise.4. The analysis of gap size.According to the detailed analysis of the sealing situation in radial gap of the pump and based on the model of parallel plank gap,the best gap,no-leaking gap of the inside circulation piston pump's radial gap are went out from the fluid mechanics and fluid machinery point of view.Finally,the case of radial gap is simulated analyzed by FLUENT software.