Frictional Loss Studies and Experimental Performance of a New Synchronal Rotary Multiphase Pump

Abstract

A new synchronal rotary multiphase pump (SRMP) is presented, which is geometrically simple and easy to manufacture. With the rotary cylinder, the frictional losses between the major components of the SRMP are minimized. Its structural design and working principles are introduced. The mathematic models of the frictional losses at various friction-couplings are formulated. Calculations on the frictional losses and mechanical efficiency are performed for a SRMP prototype, too. Experimental works on the prototype in which crude oil is used as working fluids are conducted to validate the functionality of the SRMP and the established models. The calculated results show that the frictional losses in the SRMP are mainly produced by the friction from bearings and seals. The frictional losses caused by the other part of components occupy less than 13% of the total frictional losses. In addition, the theoretical analyses of the various shaft speeds and basic geometrical parameters reveal that the cylinder rotary inertia exercises a negative effect on the friction at the sliding vane sides. Lower shaft speed and smaller eccentricity-cylinder radius ratio are helpful to reduce this effect. In the experiment, the SRMP is operated at shaft speeds of 400, 600 and 800 rpm respectively. The pressure differences are arranged within 0–2.4MPa. The measured values of the shaft consumption powers are shown to be in good agreement with the calculations. These results confirm that the SRMP is suitable for multiphase transportation and has a higher mechanical efficiency.

Analysis and numerical simulation of a novel gas–liquid multiphase scroll pump

“…By means of a small pressure transducer embedded into the groove at the root of the rotor, the pressure distributions of a multiphase compressor under various running conditions have been recorded to verify the model. Yang [8] presented a new synchronal rotary multiphase pump, and its structural design and working principles are introduced.…”

Effects of Gas-Volume Fractions on the External Characteristics and Pressure Fluctuation of a Multistage Mixed-Transport Pump

“…The flow inside a multiphase mixed-transport pump is complicated, and the performance of the pump is affected by many factors, such as loss of friction, erosive environment, divulgation loss, and different inlet gas contents [2,3]. The prediction of the performance and dependability can be validated by analyzing the lift and efficiency of a mixed-transport pump under different inlet-gas-volume fraction (IGVF) conditions [4].…”

Energy Performance and Pressure Fluctuation of a Multiphase Pump with Different Gas Volume Fractions

“…The flow in a multiphase pump is complex, and pump performance may be affected by many factors, such as frictional loss [1], corrosive circumstances [2], leakage loss under different inlet gas volume fractions (GVF) [3], and gas pockets [4]. The evaluation of performance reliability can be verified by analyzing pressure rise, head, efficiency, and tip clearance [5].…”