[Asia Fluid Network News] At present, in China. Spray valve vacuum pump is widely used, the most important feature of the slide valve vacuum pump is to remove a specific gas or contains a small part of the condensable steam gas. Slide valve vacuum pump Next it will detail its features: Sliding vacuum pump and volume and speed of the same type of other than the same pump, due to the smaller slide body size, pumping speed larger. However, due to the large swing spool rod swing, this structure is only used for small pumps. In the actual product, the structure of the valve stem and the valve slide ring are integrated. In order to reduce the vibration caused by the non-Pahang inertia force of the slide valve, for the single-cylinder single-stage pump, a balance wheel must be added on the opposite side of the drive wheel, and an unbalanced mass is added to the drive wheel to balance the vibration; As a single-stage parallel, commonly used in medium and small pumps, in order to reduce the ultimate pressure on the three-cylinder spool valve pump, there are two types of tanks and unequal length cylinder, not equal length of the cylinder is common. For three-cylinder spool pump, the middle is a long cylinder, on both sides of the cylinder for the short cylinder, long cylinder and short cylinder ratio of 2: 1, a difference of 180 ° layout. The inertia force created by the center spool is balanced by the opposite direction inertia forces generated by the spools on both sides. Exhaust valve is a spool valve pump wearing parts, but also one of the major sources of noise pump. When the inlet pressure is high, the exhaust volume is large and the exhaust valve hard valve plate is opened. At the limit pressure, only a small amount of bubbles and pump oil are removed. At this time, the hard valve plate does not move and is opened by the flexible valve plate exhaust. In order to prevent the reflux of oil and increase the noise, the flexible lip must be opened and closed within 0.01s. Pump oil Huafa pump in the airway lubrication and sealing role. Appropriate to set the oil path is very important, and sometimes can be forced to use oil pump. In a two-stage pump, the pump oil should first go to the low vacuum side and the degassed pump oil go to the high vacuum side again to get a lower limit pressure. At the outlet of the slide valve pump, an oil mist trap should be set up to capture and recover the oil mixed with the exhaust gas which is excluded by the exhaust valve, which can save pump oil and reduce environmental pollution. Oil mist trap generally has three levels: the first level is the collision mask, remove the larger oil droplets; the second level of stainless steel packing to collect small oil droplets; the third level of the proportion of sintered fibers, the visible collection of oil mist. In summary, the characteristics of the slide valve vacuum pump is very particular about the industry, to understand its characteristics, the use of products and promotion of great significance. Its characteristics are equally worthwhile for the industry professionals to continue to explore. In doing so, it is bound to provide strong guarantees for the development of our industry. Related articles: Sliding valve vacuum pump schematic diagram Sliding valve vacuum pump working principle
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