| 罗茨泵的极限真空除 |
| 添加时间：2019/9/27 15:39:29 浏览次数： |
| 罗茨泵的极限真空除取决于泵本身结构和制造精度外，还取决于前级泵的极限真空。为了提高泵的极限真空度，可将罗茨泵串联使用。罗茨泵的工作原理与罗茨鼓风机相似。由于转子的不断旋转，被抽气体从进气口吸入到转子与泵壳之间的空间v0内，再经排气口排出。由于吸气后v0空间是全封闭状态，所以，在泵腔内气体没有压缩和膨胀。 但当转子顶部转过排气口边缘，v0空间与排气侧相通时，由于排气侧气体压强较高，则有一部分气体返冲到空间v0中去，使气体压强突然增高。当转子继续转动时，气体排出泵外。罗茨泵在泵腔内，有二个"8"字形的转子相互垂直地安装在一对平行轴上，由传动比为1的一对齿轮带动作彼此反向的同步旋转运动。在转子之间，转子与泵壳内壁之间，保持有一定的间隙，可以实现高转速运行 The limit vacuum of Roots pump depends not only on the structure and manufacturing accuracy of the pump itself, but also on the limit vacuum of the front pump. In order to improve the vacuum limit of the pump, Roots pump can be used in series. The working principle of Roots pump is similar to Roots blower. Because of the continuous rotation of the rotor, the exhausted gas is sucked into the space between the rotor and the pump shell from the intake port, and then discharged through the exhaust port. Since the space of V0 is completely closed after suction, there is no compression and expansion of gas in the pump chamber. But when the top of the rotor rotates around the edge of the exhaust port and the space of V0 is connected with the exhaust side, because the pressure of the exhaust side is high, some of the gas rushes back into the space of v0, which makes the pressure of the gas increase suddenly. When the rotor continues to rotate, the gas is discharged out of the pump. Roots pump in the pump chamber, there are two "8" shaped rotors installed vertically on a pair of parallel axles, driven by a pair of gears with transmission ratio of 1 to each other reverse synchronous rotation. There is a certain gap between the rotor and the inner wall of the pump housing, which can realize high speed operation. |
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