新型爪式轉子水幫浦實驗分析

Abstract

本文針對新式正向容積幫浦－爪式轉子幫浦(claw rotor pump)研究，其爪式轉子機構設計上可減少洩漏量，能提供高容積效率；利用四種不同外徑尺寸的爪式轉子搭配提供不同轉子轉速的變頻器，在點出爪式轉子的優勢下，討論間隙對幫浦性能的影響、間隙與轉速對流量與效率的影響、以及幫浦搭配不同馬力馬達之幫浦性能分析、不同幫浦內部出口流道結構下比較與幫浦內部流道損耗影響、爪式轉子幫浦與多級離心幫浦效能比較、最後探討鋼轉子塑膠轉子性能比較等；內文包含四種實驗，歸納出爪式轉子幫浦運作間的物理關係、適用範圍；本論文實驗中四種不同大小間隙是指爪式轉子尖端與幫浦腔室間的距離；加上透過變頻器控制馬達運轉速度，使爪式轉子幫浦具有全面性的工作範圍，並利用馬達超頻之高轉速提高容積效率，進而藉由業界常用的PE(pump efficiency)值評估水幫浦效率。 由本文之結果可知道爪式幫浦效率曲線不脫離正向容積式幫浦特性，並且轉速50hz到70hz在揚程5bar以上可提供0.6以上的PE值；透過文中四個實驗結果與理論的搭配使探討上述物理意義，為往後相關領域研究提供爪式轉子幫浦設計、製造、應用依據；並期望能與節能減碳議題結合，回饋人群。

This thesis focuses on new positive displacement pump - claw rotor pump, tries to figure out what the performance of claw rotor pump caused by different factors is, and wants to make a complete expression of the relation with the performance of claw rotor pump and these factors: (1) change the gaps below by resetting different radius of claw rotors: leakage in the gap between the rotor and the housing wall, and the gap between the conjugated claw rotor pair; (2) control the frequency converter for different rotational speeds of rotor, and observe the flow rate, volume efficiency and pressure head of claw rotor pump; (3) connect with different horsepower motors; (4) change the outlet structure of claw rotor pump, and count the pressure drop in claw rotor pump; (5) compare the performance caused by steel rotors with plastic rotors; (6) compare the pump efficiency of claw rotor pump with multiple centrifugal deep water pump. According to the analysis of the experiment data above, this thesis shows the potential of claw rotor pumps and evaluates the performance of claw rotor pump depending on pump efficiency. Finally this thesis finds the best performance range of claw rotor pump in this special case, and moreover discusses what the physical significance it is within claw rotor. This is what this thesis expects to provide for the people in this field, the backgrounds of claw rotor pump, and furthermore expects to connect with Energy Saving and Carbon Reduction. Then this entire thesis can feedback the society, and benefit crowds.