The development of a screen valve for reciprocating heat pump/engine applications
The development of a screen valve for reciprocating heat pump/engine applications
复制标题
DOI：
10.1063/5.0007960
复制
发表时间：
2020-09
影响因子：
2.5
通讯作者：
M. Ameen;A. Smallbone;A. Roskilly;E. Carpenter
中科院分区：
文献类型：
--
作者：
M. Ameen;A. Smallbone;A. Roskilly;E. Carpenter
提出了一种用于先进的高效压缩机、膨胀机、热泵或发动机的新型直通口筛阀。这种新颖的设计旨在通过最大化有效开启截面积来最小化工作气体流过阀门时产生的泵送损失。在这项工作中，通过在一台经过大量改装的研究发动机上进行的一系列实验试验，研究了各种筛阀结构，以进行高速、高压气门试验。这些阀门经过设计和测试，可在1500至3000转/分的低转速和高转速范围内高效运行。阀门动力学经过优化，以满足两个高水平的性能标准--即(1)通过“最大动压”百分比量化的高速指标和(2)由阀门“最小关闭角”量化的低速指标。对阀门进行了测试，以满足避免与阀门固定器设计相关的任何摩擦锁定问题的目标。为了获得更好的设计，进行了多次测试。这项工作得出的结论是，通过在阀座上安装托架框架(而不是固定架)和立柱，阀门的性能得到了显著改善。最优设计的最大动压为50.4%，最小闭合角度为25.1°。
A novel screen valve with rectilinear ports is presented for use in advanced high-efficiency compressors, expanders, heat pumps, or engines. The novel design aims to minimize the pumping losses generated as the working gas flows through the valve by maximizing the effective opening cross-sectional area. In this work, various screen valve configurations have been investigated through a series of experimental tests conducted on a heavily modified research engine for high-speed, high-pressure valve testing. The valves were designed and tested to operate efficiently at both low and high engine speeds ranging between 1500 and 3000 rpm. The valve dynamics were optimized to meet two high-level criteria for performance—namely (1) high speed metrics quantified by its percentage of “maximum dynamic pressure” and (2) low speed metrics quantified by the valve “minimum closure angle.” The valves were tested to meet the objective of avoiding any friction-locking issues associated with the valve retainer design. Multiple tests were carried out in pursuit of attaining an improved design. The work concluded that by including a carrier frame (rather than a retainer frame) and upstands on the valve seat, the valve performance was improved significantly. The best design yielded results of 50.4% of maximum dynamic pressure and 25.1° as the minimum closure angle.