What is a rotary vane Vacuum Pump?

旋片式真空泵依赖于一个旋转机构与滑动叶片通过泵直接蒸汽流。这些泵的抽速范围很广,多级真空泵能够获得非常低的极限压力值。大多数旋转叶片泵,无论是皮带驱动还是直接由电动机的轴驱动,都使用机油润滑该机构并提供密封,以使泵达到设计真空度。

由于实验室中常见的化学蒸汽最终会污染泵油,因此近年来引入了混合泵(将旋片泵和隔膜泵组件组合在一起)和无油旋片泵以减少维修需求。使用含氟聚合物或经氮等离子体处理的组件以提高耐腐蚀性的产品也可以扩展泵的性能。

What is a rotary vane Vacuum Pump?  Picture 1

旋片式真空泵的设计

旋片式真空泵是油旋转排量泵。泵送系统包括一个壳体(1),一个偏心安装的转子 (2), 在离心力和弹力作用下径向运动的 叶片(3)以及入口和出口(4)。进水阀(如果有)设计为真空安全阀,在操作过程中始终打开。工作腔(5)位于壳体内部,并受到定子,转子和叶片的限制。偏心安装的转子和叶片将工作室分成两个独立的容积可变的隔室。随着转子旋转,气体流入扩大的吸入腔,直到被第二叶片密封为止。然后将封闭的气体压缩,直到出口阀逆着大气压打开。出口阀是油封的。阀门打开时,少量的油进入吸入室,不仅对其进行润滑,而且还将叶片密封在壳体(定子)上。

旋片真空泵的优势

油密封旋转式叶片泵紧凑且安静在操作中,具有特别高的水蒸气耐受性。新型侧面安装的集水桶和油雾过滤器设计提高了这些设计质量,同时扩展了应用范围。加压油循环确保稳定,低极限真空,大多数型号上的集成截止阀可防止油在关闭时迁移。可提供多种抽速和最终真空规格,以适应各种应用。

旋片真空泵的用途

叶片泵通常用作高压液压泵,并在汽车中使用,包括增压泵,动力转向泵,空调泵和自动变速器泵。用于中等压力的泵包括诸如喷泉软饮料分配器和意式浓缩咖啡机的碳酸化器等应用。此外,叶片泵可用于低压气体应用中,例如用于自动排气排放控制的二次空气注入,或用于低压化学气相沉积系统。

Rotary vane pumps are also a common type of Vacuum Pump, and two-stage pumps are capable of pressures well below 10 -6 bar. These Vacuum Pumps are used in applications such as brake assist in large trucks and diesel-powered passenger cars (whose engines do not generate an intake Empty refrigerant. Production line during installation of air conditioner, laboratory freeze dryer and vacuum experiment in physics. In vane pumps, the pumped gas and oil are mixed inside the pump and therefore need to be separated externally. So the inlet and outlet have a large chamber, possibly with a vortex, where oil droplets fall out of the gas. Sometimes there is a louver at the inlet which is cooled by the room air (usually 40 K hotter at the pump) to condense broken pumped oil and water and let it drip back into the inlet.


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