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Brush seal low surface speed hard-rub characteristics
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机译:刷式密封低表面速度的硬摩擦特性
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摘要
The bristles of a 38.1-mm (1.5-in.) diameter brush seal were flexed by a tapered, 40-tooth rotor operating at 2600 rpm that provided sharp leading-edge impact of the bristles with hard rubbing of the rotor lands. Three separate tests were run with the same brush accumulating over 1.3 x 10(exp 9) flexure cycles while deteriorating 0.2 mm (0.008 in.) radially. In each, the test bristle incursion depth varied from 0.130 to 0.025 mm (0.005 to 0.001 in.) or less (start to stop), and in the third test the rotor was set 0.25 mm (0.010 in.) eccentric. Runout varied from 0.025 to 0.076 mm (0.001 to 0.003 in.) radially. The bristles wore but did not pull out, fracture, or fragment. Bristle and rotor wear debris were deposited as very fine, nearly amorphous, highly porous materials at the rotor groove leading edges and within the rotor grooves. The land leading edges showed irregular wear and the beginning of a convergent groove that exhibited sharp, detailed wear at the land trailing edges. Surface grooving, burnishing, 'whipping,' and hot spots and streaks were found. With a smooth-plug rotor, post-test leakage increased 30 percent over pretest leakage.
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机译:直径为38.1毫米(1.5英寸)的刷式密封件的刷毛被锥形的40齿转子以2600 rpm的转速弯曲,该刷头可对刷毛产生尖锐的前缘冲击,并严重摩擦转子凸台。使用相同的刷子进行了三个单独的测试,这些刷子累积了1.3 x 10(exp 9)个挠曲周期,同时径向变差了0.2 mm(0.008 in。)。在每种情况下,测试刷毛的侵入深度在0.130到0.025毫米(0.005到0.001英寸)或更小(开始到停止)之间变化,在第三次测试中,转子的偏心距设置为0.25毫米(0.010英寸)。径向跳动范围从0.025到0.076毫米(0.001到0.003英寸)。刷毛磨损,但没有拉出,断裂或破碎。刷毛和转子磨损碎屑沉积为非常细的,几乎是无定形的,高度多孔的材料,沉积在转子槽的前缘和转子槽内。陆地前缘显示出不规则磨损,并且会聚凹槽的起点在陆地后缘表现出尖锐,细腻的磨损。发现表面开槽,打磨,“搅打”以及热点和条纹。使用平滑塞转子,测试后泄漏比测试前泄漏增加了30%。
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机译:万向节密封件-具有细长的球形密封表面,该表面可滑入较厚的外表面,以提供防尘密封等。AB DE4036616A两根轴(1、2)通过万向节连接,一根轴(2)装有一个球面联轴器(3)在第二轴的外球面内移动。第二根轴具有细长的球形密封表面(8),该表面在较厚的外表面内滑动。相互交叉的球形密封表面提供了有限的灰尘等进入的密封。密封唇(8a,9)密封了壳体的作用。优势-改进了对万向接头的保护,将砂砾损坏的风险降至最低。 AN 91194459 TI用于转速测量的脉冲环-倾斜的计数器部分沿环的外围压出,与传感器单元相互作用以确定速度和方向