南白象街道EASTOUR刹车电机廷原调速马达PGR60-4

　　9.如何克服两相混合式步进电机在低速运转时的振动和噪声?

　　步进电机低速转动时振动和噪声大是其固有的缺点，一般可采用以下方案来克服：

　　A.如步进电机正好工作在共振区，可通过改变减速比等机械传动避开共振区；

　　B.采用带有细分功能的驱动器，这是最常用的、最简便的方法；

　　C.换成步距角更小的步进电机，如三相或五相步进电机；

　　D.换成交流伺服电机，几乎可以完全克服震动和噪声w，但成本较高；

　　E.在电机轴上加磁性阻尼器

南白象街道EASTOUR刹车电机廷原调速马达PGR60-4

步骤以得到所需要的阀门关闭。第三，在存在振动情况时，阀座环在关闭位置处不能被旋塞保持就为，是因为阀座环最终可能松动并通过阀座垫片产生泄漏或阀座表面不对中。某些截止阀要求鼓泡严密关闭，这用金属对金属密封是达不到的。为完成这些，在阀座环中可嵌入弹性体。在这种情况下，阀座环是两部分结构，即在两个半边之间嵌入弹性体。金属旋塞表面压向阀座环软支座表面，如阀芯和阀座环表面是同心的，就能得到双重严密的关闭。某些制造商也在阀芯内嵌入弹性体已得到相同效果。
南白象街道EASTOUR刹车电机廷原调速马达PGR60-4

南白象街道EASTOUR刹车电机廷原调速马达PGR60-4

KDR60-4-5-7-10-16-20-25-35-40-70-100-P2-P1
KDR60-64-80-125-140-175-280-350-500-P2-P1
KDR90-4-5-7-10-16-20-25-35-40-70-100-P2-P1
KDR90-64-80-125-140-175-280-350-500-P2-P1
KDR120-4-5-7-10-16-20-25-35-40-70-100-P2-P1
KD60-4-5-7-10-16-20-25-35-40-50-70-100-P2-P1
KD60-64-80-125-140-175-245-280-350-500-P2-P1
KD90-4-5-7-10-16-20-25-35-40-50-70-100-P2-P1
KD90-64-80-125-140-175-245-280-350-500-P2-P1
KD120-4-5-7-10-16-20-25-35-40-50-70-100-P2-P1
KD120-64-80-125-140-175-245-280-350-500-P2-P1
KD160-4-5-7-10-16-20-25-35-40-50-70-100-P2-P1
KD160-64-80-125-140-175-245-280-350-500-P2-P1
KD200-4-5-7-10-16-20-25-35-40-50-70-100-P2-P1
KD200-64-80-125-140-175-245-280-350-500-P2-P1
KDR120-64-80-125-140-175-280-350-500-P2-P1
KDR160-4-5-7-10-16-20-25-35-40-70-100-P2-P1
KDR160-64-80-125-140-175-280-350-500-P2-P1
KDR200-4-5-7-10-16-20-25-35-40-70-100-P2-P1
KDR200-64-80-125-140-175-280-350-500-P2-P1


南白象街道EASTOUR刹车电机廷原调速马达PGR60-4
一次涂膜过厚。下层漆未干燥充分，即进行面涂。固化剂添加过量。上下层涂料性质不合。已有裂痕的旧涂膜再新涂膜。底灰油性少、易收缩、填补不充分。预防：木材含水率应干燥至1%以上。适当的涂布量，少量多次，并且层间应充分干燥。待底层干燥后再予以上涂。按比例添加固化剂。正确了解同种类涂料的搭配，慎重选择。刮除已有裂痕的旧漆膜，才可再喷涂。填补充分，不留裂纹。剥落原因：木材油脂含量高。木材含水率高。底材表面有蜡质或油污沾染。

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