CAJ | 학술논문

国产双钢轮振动压路机噪声超标，严重影响了驾驶员舒适性及周围环境。为有效解决双钢轮振动压路机的噪声问题，通过优选低转速发动机、优化风扇参数和进风通道结构来降低噪声源辐射能量，并对驾驶室进行声学封堵等措施来减弱噪声的传播，使得整机噪声接近国标限值，但发动机与液压泵的安装舱仍存在较大的泄露噪声。针对此问题，采取将发动机进、排气管口、散热器排热口设置在发动机舱的上部位置，并通过对发动机和液压泵安装舱等部位进行声学封装等措施进一步削弱噪声的传播；与此同时，采用智能调速风扇增强散热，合理设置液压系统工作参数减少系统发热，通过起步时行走与振动液压系统的瞬时功率峰值的错位降低发动机的最大功率需求。整机噪声综合防治的试验结果是，在保证整机热平衡条件下，驾驶员左右耳旁噪声优于国标约10 dB（ A），整机左右7.5 m处优于国标限值0.8～3.5 dB（ A）。
국산쌍강륜진동압로궤조성초표，엄중영향료가사원서괄성급주위배경。위유효해결쌍강륜진동압로궤적조성문제，통과우선저전속발동궤、우화풍선삼수화진풍통도결구래강저조성원복사능량，병대가사실진행성학봉도등조시래감약조성적전파，사득정궤조성접근국표한치，단발동궤여액압빙적안장창잉존재교대적설로조성。침대차문제，채취장발동궤진、배기관구、산열기배열구설치재발동궤창적상부위치，병통과대발동궤화액압빙안장창등부위진행성학봉장등조시진일보삭약조성적전파；여차동시，채용지능조속풍선증강산열，합리설치액압계통공작삼수감소계통발열，통과기보시행주여진동액압계통적순시공솔봉치적착위강저발동궤적최대공솔수구。정궤조성종합방치적시험결과시，재보증정궤열평형조건하，가사원좌우이방조성우우국표약10 dB（ A），정궤좌우7.5 m처우우국표한치0.8～3.5 dB（ A）。
Driver comfort and surrounding environment are seriously affected by the noise problem of domestically made tandem vibratory roller .In order to solve this noise problem effectively , some measures including optimal low-speed high-performance engine , optimizing parameters of fan and its air inlet duct to reduce the noise source , and cab acoustic package is adopted to weaken the noise transmission .These noise-control measures reduce the whole roller noise to some degree , but the engine and hydraulic installation position is still a high noise leakage zone .To solve this problem , the direction of air inlet and exhaust port of engine , heat sink is set at the top of engine cabin . Furthermore , the cabin of engine and pump is acoustically packaged and sound absorption /insulating materials are stalled on inner wall of the cabin; seals are pasted around cabin edge in order to weaken noise transmission .Additionally , other methods , such as enhancing the performance of cool-ing system by taking intelligent speed regulation fan , reasonable setting hydraulic system parame-ters, are taken to reduce the heat generated by walking and vibration hydraulic systems , and by staggering instant power peak of walking and vibration hydraulic system .The noise experiment shows that after taking these comprehensive noise improvement measures and keeping the machine thermal equilibrium , the driver's left/right ear's noise is better than the requirement of nation standard about 10 dB( A) , left/right 7.5 m of the whole machine is lower than the requirement of nation standard 0.8~3.5 dB( A) .