蝸輪減速機效率之研究

Study on the Efficiency of a Worm Gear Reducer

邱活泉(Ho-Chyuan Chiu)

《農業機械學刊》 16卷2期 (2007/06) Pp. 39-46

https://doi.org/10.30062/JAM.200706.0004

摘要

蝸輪減速機廣泛用於農工機械，如碾米機、輸送機、打水機與鋼管製造機等。蝸輪減速機的優點是高減速比、體積小、重量輕，其缺點是傳動效率較低。本研究的目的即在設計傳動效率較高之蝸輪減速機。爲量測蝸輪減速機的效率，發展出一種可以量測蝸輪減速機功率之功率計。蝸輪減速機的動力源是1/4 ps四極交流馬達。試驗結果顯示，蝸桿的導程角愈大，蝸輪減速機的傳動效率愈高，但蝸桿與蝸輪的磨擦係數爲0.1時，對於20°法面壓力角之齒輪型式，蝸桿的導程角達42°爲效率最大值。蝸桿切口螺線數愈多，可使導程角愈大。機械設計時，蝸桿的導程角等於蝸輪的螺旋角。

關鍵字

蝸桿 ； 蝸輪 ； 減速機 ； 效率 ； 導程角

並列摘要

A worm gear reducer is widely used in agricultural and industrial machines such as rice drying machine, belt conveyor, paddle wheel aerator, pipe milling machine, etc. The merits of a worm gear reducer is its high speed ratio, less volume and lightweight, but the efficiency is comparatively low. This study was to design a worm gear reducer with comparatively high efficiency. A disc prony brake was developed. This brake could measure the output of a worm gear reducer by a driving motor. The results of experimental data revealed that the larger lead angle has the more efficiency. Maximum efficiency would occur at lead angle of 42° if the coefficient of worm and worm gear was 0.1 for a gear type with 20° normal pressure angle. More number of start thread could have a larger lead angle in a worm. Inmechanical design, the magnitude of lead angle of worm is equal to the magnitude of helix angle of worm gear in a worm gear reducer.

並列關鍵字

Worm ； Worm gear ； Reducer ； Efficiency ； Lead angle