内压缩转子式油气混输泵输入功率的计算与分析

Calculating and Analyzing Input Power of Oil-gas Multiphase Pump of Internal Compression Rotor

通过分析内压缩转子式油气混输泵工作原理及其内压缩过程,得出了转子泵输入功率P、附加输入功率Ps及其无内压缩过程泵输入功率Pt的理论计算公式,并且通过实例计算分析得出不同内压缩比λ(分别改变吸入压力p1和排出压力pd)和气液比τ对该新型内压缩转子式油气混输泵P、Ps/P及(Pt-P)/Pt的影响规律。当λ一定时,随着τ的增大,P减小,Ps/P和(Pt-P)/Pt增大;改变λ时,P与λ的关系较复杂,Ps/P始终随着λ的增大而减小,(Pt-P)/Pt随着λ的增大而增大,改变p1时,P变化地更快,而改变pd时,Ps/P变地更快,改变p1和pd对(Pt-P)/Pt的影响不大;当τ趋近于1.0时,即纯气工况条件下,P、Ps/P、(Pt-P)/Pt都会发生突变。

Analyzing the working principles and internal compression processes of an oil-gas multiphase pump,its theoretical calculation formulas is deduced,its input power P,its additional input power Psand the input power Pt of external compression pump. With an actual example,the changes in P,Ps/ P and( Pt- P)/Ptof pumps are summarized under the internal compression ratio λ( by changing the suction pressure p1 and the discharge pressure pd) and the gas-liquid ratio τ. When λ is constant,P decreases,Ps/ P and( Pt-P)/Ptincrease with τ increasing.If λ changes,the relationship between P and λ is more complicated; Ps/ P always decreases with λ increasing and( Pt-P)/Ptbehaves in an opposite way. P changes faster when p1 changes in relation to the changing pd; Ps/ P behaves in an opposite way;( Pt- P)/Pthas little change. Once τ approaches 1. 0,P,Ps/ P and( Pt- P)/Pt mutate.