Vacuum packing machine is how to choose the vacuum pump?

Vacuum packing machine is how to choose the vacuum pump? Vacuum pump is the key equipment of vacuum system, commonly used reciprocating type, rotary type, water ring type, blade type, jet type and so on. Most electric porcelain production of vacuum pug mill with reciprocating, water ring and rotary vacuum pump, in order to obtain higher vacuum degree the following introduction to their work principle, for type selection reference, as for concrete structure, sex can row can refer to the product sample and specifications. The key part of vacuum packing machine is the configuration of vacuum pump.

Vacuum packing machine is how to choose the vacuum pump? In the cylinder of the pump shell, before starting, in the pump shell part, water impeller rotates, due to the effect of centrifugal force, to the water around and form a rotating water ring, the inner surface of the water ring upper tangent with the impeller shell, along the direction of arrow rotation of the impeller, on the right side of the process, the inner surface of the water ring gradually away from the round shell, space is formed between the blade gradually expanded, with pressure to reduce, the air from air intake pipe through the pump shell side inlet is inhaled. In the process of the left half, the inner surface of the water ring gradually approaches the water ring vacuum of the wheel shell. The space between the blades is gradually reduced and the pressure increases. The air is discharged from the exhaust pump port through the exhaust pipe. The main configuration of the body packaging machine also includes vacuum pump.

Vacuum packing machine is how to choose the vacuum pump? When the water ring vacuum pump is working, a small amount of water should be often inhaled from the suction pipe to maintain the water ring inside the vacuum pump, and the heat generated by the rotary friction can be removed without increasing the water temperature. However, when the vacuum pump works, the added water should not be too much, otherwise it will affect the volume efficiency of the vacuum pump, reduce the suction capacity.

Vacuum packing machine is how to choose the vacuum pump? The pump shell and cover are made of cast iron, and the impeller is made of copper. This kind of pump can be used as vacuum pump, as well as for conveying liquid and gas. When the pump is filled with oil and other liquid medium, it is called liquid ring pump.

Vacuum packing machine is how to choose the vacuum pump? This kind of pump has the advantage of simple construction and easy maintenance. Rotating part without mechanical contact friction, so long life, especially suitable for conveying liquid gas belt. Disadvantages are low power (0.3~0.5). If more than one of these pumps are connected in series in the same oil tank to form a series unit, the ultimate vacuum obtained is up to 10-mmhg which is required to create a high vacuum, the vacuum pump can be used.

Vacuum packing machine is how to choose the vacuum pump? Compared with reciprocating vacuum pump, it does not use four-bar mechanism, smooth movement, can be high speed, do not need to intake valve, the main disadvantage of the structure is mechanical contact friction, rotary disc easy to seal oil requirements higher, more oil consumption. Compact and lightweight, high vacuum can be achieved.

Vacuum packing machine is how to choose the vacuum pump? This kind of pump is often used as the front stage of high vacuum pump. It can remove moist gas, but it is not suitable to remove gas containing high oxygen, corrosive to black metal, chemical reaction to pump oil and gas containing particle dust. Shaft and pump cylinder is concentric, shaft rotation drive eccentric wheel.