Balancing of a Slider-Crank Mechanism by Using a Counter Mass and a Progressive Spring with Two Rates

Abstract

This paper investigates the possibility to individually balance the specific shaking forces and shaking moment of the slider-crank mechanism. The most common mean of balancing the slider crank mechanism is to use a counter mass. This solution is applied for almost every slider-crank mechanism used in commercial mechanical devices. However the nature of the mechanism does not allow a perfect balancing in such a way. The different nature of motions that govern the piston displacement and crank rotation imply that a counter mass can only statically balance the mechanism. An ideal dynamic balancing cannot be achieved this way. Therefore in this paper the excitations that act on the mechanism are split by the nature of motion that generates them and balanced accordingly. Two motions are defined, respectively the motion of the piston and the motion of the crank. The inertia force associated with the crank motion is balanced by building a dynamically equivalent system around the axis of the crankshaft while the excitation associated with the motion of the piston is balanced with a progressive spring with two rates.

CNC Kesi̇m Maki̇nesi̇ Ana Hareket Si̇stemi̇ni̇n Sarsma Kuvvetleri̇ni̇n Azaltilmasi Ve Bağlanti Çubuğunun Yapisal Anali̇zi̇

“…Dönme hareketinin lineer harekete ya da lineer hareketin dönme hareketine dönüşümünü sağlayan, en temel sistemlerden olan krank-biyel ya da kaydırıcı-krank mekanizmalarına dayanan makineler hala araştırmacıların çalıştığı karmaşık konular arasındadır (Dang, 2021). Krank-biyel mekanizmalarında dengelenmemiş kuvvet ve momentler, sarsma kuvvetleri olarak bilinmektedir ve sarsma kuvvetleri, makinelerin çalışması sırasında titreşime sebep olmaktadır (Groza, 2016). Oluşan olumsuz titreşimleri yok etmek için çeşitli dengeleme yöntemleri sunulmuştur.…”