Rocking piston type dry vacuum pumps

What is Rocking piston type dry vacuum pumps？

Rocking Piston type dry vacuum pump is a mechanical vacuum pump that transfers gas by the reciprocating motion of a piston interlocking with an eccentric rotating shaft.

Features of Rocking piston type dry vacuum pumps

Since this is an oil-less pump, backflow of air through the sliding part between the cylinder and piston ring is unavoidable. Because of its simple structure, this pump has low ultimate pressure. However, it can obtain stable pressure in a low vacuum region.
Some models can also be used as a pressurizing source for compressors. The pump is widely used in printed board mounting equipment, vacuum packaging machines, material adsorption transfer equipment, labeling machines, printing ink degassing machines, printing machines, photograph plate making machines, screen printing machines, degassing machines, burying machines, baking furnaces, suction machines, automobile exhaust gas analyzers, refrigerant recovery device, plasma cutting equipment.

Strength: The pump has a simple structure and is easy to maintain.
Weakness: The pump can not obtain a high vacuum.

Applications

Some models can also be used as a pressurizing source for compressors. The pump is widely used in printed board mounting equipment, vacuum packaging machines, material adsorption transfer equipment, labeling machines, printing ink degassing machines, printing machines, photograph plate making machines, screen printing machines, degassing machines, burying machines, baking furnaces, suction machines, automobile exhaust gas analyzers, refrigerant recovery device, plasma cutting equipment.

Mechanism of Rocking piston type dry vacuum pumps

When the eccentric cam directly connected to the motor rotates, the piston moves up and down in the cylinder while swinging. The space inside the cylinder changes due to the vertical movement of the piston, and the gas is transported by repeating intake, compression and exhaust.

　Movie：Exhaust Principle