| 钱碧波,万勇,吴波,谢代梁.新型水大流量标准装置及换向性能评价技术研究*[J].电子测量与仪器学报,2021,35(11):47-53 |
| 新型水大流量标准装置及换向性能评价技术研究* |
| Research on a new type of large water flow standard facility andthe performance evaluation technology of diverter |
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| DOI： |
| 中文关键词: 水大流量标准装置 新型换向系统 换向误差模型 性能评价 不确定度评定 |
| 英文关键词:large water flow standard facility new reversing system reversal error model performance evaluation uncertainty assessment |
| 基金项目:国家重点研发计划(2019YFB2006601)项目资助 |
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| Author | Institution |
| Qian Bibo | Guangzhou Institute of Energy Testing, Guangzhou 511447, China |
| Wan Yong | Guangzhou Institute of Energy Testing, Guangzhou 511447, China |
| Wu Bo | Guangzhou Institute of Energy Testing, Guangzhou 511447, China; National Institute of Metrology, Beijing 100029, China |
| Xie Dailiang | Key Laboratory of Flow Measurement Technology of Zhejiang Province, China Jiliang University, Hangzhou 310018, China |
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| 摘要点击次数: 1849 |
| 全文下载次数: 943 |
| 中文摘要: |
| 水大流量标准装置是开展大口径流量仪表测试、确保大流量量值溯源与传递准确可靠的核心设备，换向器是影响其测量结果准确性与可靠性最关键的部件。针对现有水大流量装置存在稳定性难以保证、换向误差较大、被检仪表尺寸适应性差以及测试效率较低等诸多局限，设计并研制了一套高准确度、高流速大口径水流量标准装置及新型换向系统，装置集静态质量法、容积法和标准表法3种原理于一身，其最大测试管径为DN1000、最大运行流量10 000 m3/h、局部最高流速可达10 m/s，整体不确定度优于02%（k=2）；分析了静态质量法水装置换向过程中液体流量的变化特征，建立了换向流量误差与计时误差关系模型，据此开展了对新型单向换向器的不确定度评价实验测试，结果表明，计时不确定度优于883×10-6、测量时间总不确定度优于924×10-6，量级均十分微小，该换向装置性能出色 |
| 英文摘要: |
| The large water flow standard facility is the core device for carrying out large pipe diameter flow meter test and ensuring the accuracy and reliability of traceability and transmission of large water flow value, and the diverter is the most important component which affects the accuracy and reliability of the measurement results. Aiming at the limitations of the existing facilities for large water flow, such as difficult stability assurance, large reversing error, poor dimensional adaptability of the tested instrument and low test efficiency, a set of large diameter water flow standard facility with high accuracy, high velocity and a new reversing system were designed and developed. The facility has three principles of static mass method, volume method and standard meter method at the same time, and the maximum test pipe diameter is DN1000, the maximum operating flow rate is 10 000 m3/h, the local maximum flow velocity can reach 10 m/s, the overall uncertainty is better than 02% (k=2). The law of liquid quality change during the reversing process in the static mass method large flow standard facility was analyzed, and the relation model between reverse flow error and timing error is established, and finally the uncertainty evaluation test of this new type of diverter was carried out, the results show that the timing uncertainty is better than 883×10-6 and the total uncertainty of measurement time is better than 924×10-6, and the magnitude is very small, so the performance of the diverter is excellent. |
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