滑叶式气泵叶片滑动力矩特性研究

T. Ueki, K. Inaba
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引用次数: 0

摘要

滑叶式气泵在印刷机中用作气源,它提供纸张处理所需的吹风和吸力。在气泵中,电机功率的很大一部分被叶片与机匣缸面之间的滑动摩擦所占据。因此,为了设计出寿命更长、能耗更低的实用干式气泵,有必要定量地阐明摩擦机理。本文首先通过轴转矩对单叶片的滑动力进行了实验测量,明确了其产生的机理。然后,对多叶片转矩进行了类似的研究,分析了多叶片转矩受腔室压力影响的特性。由此得出以下结论:1)。单叶片滑动转矩随转子旋转呈循环变化,其绝对值远远大于仅对叶片施加离心力所估计的理论值。2). 由于叶片在转子狭缝处运动的约束,单叶片的滑动力矩受到很大的影响。具体来说,在最大推力高度和最大推力速度之间的某一点附近,滑动扭矩最大。因此,旋翼狭缝设置角是影响叶片性能的重要参数。3). 在实际的多叶片气泵中,叶片腔内和转子槽底部空间的气压严重影响叶片沿转子狭缝的运动。因此,连接转子狭缝底部的气孔以及叶片侧面形成的气孔对于减小滑动力矩是有效的。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Characteristics on Sliding Torque of Blades in a Slide-Blade Type Air Pump
Slide-blade type air pumps are utilized in printing machines as an air source which provides both the action of air blowing and suction necessary for the paper handling. In the air pump, a large part of the motor power is occupied by the sliding friction between blades and cylinder surface of the casing. So, it is necessary to clarify the mechanism of the friction quantitatively in order to design practical dry air pumps with longer life and less energy consumption. In the paper, fi rst of all, the sliding force by a single blade was measured experimentally through the axle torque, and its mechanism was made clear. Then, the torque by multi-blades was investigated similarly, and its characteristics which should be aff ected by chamber pressure were analyzed. As a result, the following conclusions are obtained: 1). The sliding torque by a single blade indicates a cyclic change with rotor rotation, the absolute value of which is far larger than the theoretical one estimated by the centrifugal force to the blade solely. 2). The sliding torque by a single blade is aff ected signifi cantly due to the constraint of the blade movement at the rotor slit. Specifi cally, the sliding torque is the largest around a point between the maximum protrusion hight and the maximum thrust speed. Therefore, the set angle of rotor slits is an important parameter for the blades behavior. 3). In actual air pumps with multi-blades, the air pressure in the blade chambers as well as in the bottom space of the rotor grooves seriously aff ect the blade motion along the rotor slit. Therefore, air holes connecting the bottom of the rotors slits as well as air slots formed on the blade side-face are eff ective for decreasing the sliding torque.
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