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联系人:南经理
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当前位置:首页 >>新闻中心 >> 启闭机的噪声控制介绍
我们认为底盘的设计制造存在造成噪声的可能,底盘采用箱形结构,不是所有焊缝都进行连续焊接,各个底盘焊缝的长短、高低位置不同,底盘刚性存在较大个体差异,有的则产生共鸣效应,机器如有一点震动噪声就被放大;由于底盘由钢板焊成,不具备吸震消声功能,如果其固有频率与齿轮啮合频率接近就可能造成个别机器因齿轮弱小震动引发较大共震,引起噪声值上升。 针对上述可能性分别进行试验,通过三次实验发现噪声高低与底盘结构、刚度、频率等因素呈弱相关,噪声大小与运动件强相关,此底盘设计构造、制造质量并不是噪声超标的原因。 由于轴承间隙产生的噪声有人认为,既然噪声是伴随卷筒总成和传动件,那么就可能由于卷筒滑动轴承间隙大而引起。我们对卷筒零件配合间隙进行选择,保证轴承孔与主轴间隙符合图纸要求,装配后进行试验。试验时采用变频电机调速,观察速度对噪声的影响。 试验结果表明,速度对噪声影响是第一位的,卷筒转速越高则噪声值越大、机器震动越激烈;间隙在其次,主轴与轴套间隙越大则噪声也越大;而底盘对噪声影响最小。如果机器本来噪声就很低,则速度高低、主轴间隙大小的变化都不会产生过大噪声,由此表明噪声超标也不是由轴承间隙大而引起的。 We think the design and manufacture of the chassis may cause noise. The chassis structure is used in the chassis, not all the welds are continuously welded. The length and position of the chassis are different, the rigidity of the chassis has a large individual difference, and some results in the resonance effect, and the machine is amplified by a little vibration noise. Because the chassis is welded by the steel plate, it does not have the sound absorption and noise elimination function. If the natural frequency of the chassis is close to the gear meshing frequency, it may cause a few machines to cause larger common shock due to the weak and small vibration of the gear, causing the increase of the noise value. According to the above possibility, the three experiments show that the noise level is weakly related to the chassis structure, stiffness, frequency and other factors. The noise size is strongly related to the moving parts. The design structure and manufacturing quality of the chassis are not the reasons for the noise exceeding the standard. Because of the noise produced by the bearing gap, it is believed that since the noise is accompanied by the drum assembly and the transmission, it may be caused by the large clearance of the roller bearing. We choose the mating clearance of the reel parts to ensure that the gap between the bearing hole and the spindle meets the requirements of the drawing and carry out the test after assembly. The speed of the variable frequency motor is used to observe the effect of speed on noise. The test results show that the velocity has the first effect on the noise. The higher the speed of the drum, the greater the noise, the more intense the vibration of the machine; the bigger the gap between the spindle and the shaft sleeve, the bigger the noise, and the least influence of the chassis to the noise. If the noise of the machine is very low, the change of the speed and the size of the spindle gap will not produce too much noise, which indicates that the noise exceeding the standard is not caused by the large clearance of the bearing.
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联系人:南经理 手机:13932899771 15612833218 电话/传真:0318-8830218 邮箱:706843811@qq.com 地址:河北省冀州市西王工业区
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