清洗水泵是泵车上必不可少的装备,水泵实际须配的功率很低(约3 k W),而泵车发动机功率很大(287 k W),现所有泵车水泵的液压系统,均采用定量泵-定量马达系统,在发动机高速运转、定量齿轮泵系统流量很大时,水泵将泵出高压水,而发动机怠速...清洗水泵是泵车上必不可少的装备,水泵实际须配的功率很低(约3 k W),而泵车发动机功率很大(287 k W),现所有泵车水泵的液压系统,均采用定量泵-定量马达系统,在发动机高速运转、定量齿轮泵系统流量很大时,水泵将泵出高压水,而发动机怠速、系统流量低时,系统基本没法正常泵水工作。针对此问题,提出了一种定量泵-定量马达系统流量匹配的设计方法,该方法能保证水泵系统在泵车发动机从怠速到全速各工况下,均能正常工作、泵出高压水,并且利用AMESim软件,建立流量匹配装置的仿真模型,对流量匹配装置工作的动态特性进行仿真分析。仿真结果表明,该系统的动态工作性能完全满足设计的要求。展开更多
The water carrying capacity and head loss of pipelines are significantly affected by the flow state,aiming at the problem that the transition flow characteristics of multi caliber basalt fiber drainage pipe are not cl...The water carrying capacity and head loss of pipelines are significantly affected by the flow state,aiming at the problem that the transition flow characteristics of multi caliber basalt fiber drainage pipe are not clear,based on the two-di-mensional numerical simulation results of multi-diameter pipes with barriers,this paper systematically analyzes the transition path and transition mecha-nism of the multi-diameter drainage pipe convection system under the action of barriers in the range of Re=10^(3)-2.73×10^(8).The results show that:1)The main mode solution of multi-aperture basalt fiber drainage pipe convection system is steady flow in the process of transition to chaos.2)Compared with the non-barrier condition,the transition process of the multi-aperture basalt fiber drainage pipe with the barrier is obviously delayed,that is,the critical Reynolds number of the convective system evolving from laminar flow to tur-bulent flow is larger.The research results show that the design of the barrier can effectively improve the water conveyance capacity of the pipeline,which can provide reference for the optimal design of multi-diameter drainage pipes.展开更多
文摘清洗水泵是泵车上必不可少的装备,水泵实际须配的功率很低(约3 k W),而泵车发动机功率很大(287 k W),现所有泵车水泵的液压系统,均采用定量泵-定量马达系统,在发动机高速运转、定量齿轮泵系统流量很大时,水泵将泵出高压水,而发动机怠速、系统流量低时,系统基本没法正常泵水工作。针对此问题,提出了一种定量泵-定量马达系统流量匹配的设计方法,该方法能保证水泵系统在泵车发动机从怠速到全速各工况下,均能正常工作、泵出高压水,并且利用AMESim软件,建立流量匹配装置的仿真模型,对流量匹配装置工作的动态特性进行仿真分析。仿真结果表明,该系统的动态工作性能完全满足设计的要求。
基金supported by Sichuan Science and Technology Program of China(No.2024ZHYS0001).
文摘The water carrying capacity and head loss of pipelines are significantly affected by the flow state,aiming at the problem that the transition flow characteristics of multi caliber basalt fiber drainage pipe are not clear,based on the two-di-mensional numerical simulation results of multi-diameter pipes with barriers,this paper systematically analyzes the transition path and transition mecha-nism of the multi-diameter drainage pipe convection system under the action of barriers in the range of Re=10^(3)-2.73×10^(8).The results show that:1)The main mode solution of multi-aperture basalt fiber drainage pipe convection system is steady flow in the process of transition to chaos.2)Compared with the non-barrier condition,the transition process of the multi-aperture basalt fiber drainage pipe with the barrier is obviously delayed,that is,the critical Reynolds number of the convective system evolving from laminar flow to tur-bulent flow is larger.The research results show that the design of the barrier can effectively improve the water conveyance capacity of the pipeline,which can provide reference for the optimal design of multi-diameter drainage pipes.
