等流量閥之動態特性

Dynamic Characteristics of Constant-flow Valves

胡聖彥(Sheng-Yen Hu)

指導教授 ： 康淵 ； 張永鵬

中原大學/工學院/機械工程研究所/博士(2015年)

https://doi.org/10.6840/cycu201500278

摘要

中文摘要
任一等流量閥或泵都是供給定流量來補償當負載變化時的軸承油腔壓力，因為設備結構複雜性的差異，使前者的成本較後者低。等流量閥在補償軸承油腔壓力應付負載變動時，儘管壓力在不斷的變化，流率可以保持不變。然而，閥的設計參數必須滿足特定條件。本文運用分析的方法研究了等流量閥的靜態與動態特性，三種類型屬於傳統設計的等流量閥被重新探討；此外，一個創新設計被提出。研究結果顯示這些類型的閥在成為等流量時，其設計參數之間有特定的關係，除了第三種傳統設計是無法成為等流量閥。
本論文是利用油腔壓力變動所造成的流率變化來分析並比較三種等流量閥的動態特性，其結果得到等流量的動態響應和可用的壓力範圍。此外，本文還利用各種設計閥的分析結果來比較其動態行為。結果顯示這兩個雙活塞型具有相同的靜態特性，但動態特性為單反饋比雙反饋好，而滑桿型的靜態和動態特性皆優於這兩個雙活塞型。

關鍵字

等流量閥 ； 靜壓軸承 ； 靜態特性 ； 動態特性

並列摘要

Abstract
Either constant-flow valve or pump is designed for supplying constant flow to compensate recess pressure when load changes. Because of the difference in device complexity, the cost of the former is lower than that of the latter. The constant-flow valves can compensate pressures of bearing recesses as load fluctuates and the flow rate can be constant in spite of the pressure changes in recesses. However, a specific relationship among design parameters must be complied in valve design for constant-flow. This thesis utilizes an analytical method is chosen for studying the static and dynamic characteristics of constant-flow valves, and the three kind of traditional design of constant-flow valves are reviewed afresh. Moreover, an innovative design for constant-flow valve is presented. The analysis of results reveal that appropriate relationships among design parameters for these kind valves, except the third traditional valve cannot be constant-flow.
This thesis which studies an analytical method is used to determine the variations of the flow rate due to recess pressure fluctuation. The results give the variation spectra around the constant flow rates and various pressure ranges for their availability of different valves. Additionally, this study uses analytical results to compare dynamic behavior among various designs of valves. The result of this thesis reveals both double-piston types have the same static characteristics, but the dynamic characteristics by single feedback are better than double feedback. While both static and dynamic characteristics of the spool-type surpass both double-piston types.

並列關鍵字

Constant-flow valve ； Hydrostatic bearing ； Static characteristics ； Dynamic characteristics

參考文獻

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