Valve Ningbo Safewell Plumbing Co., Ltd. , https://www.safewellbrass.com
Reciprocating vacuum pump working principle (with photos)
Reciprocating vacuum pump (referred to as reciprocating pump), also known as piston vacuum pump, belonging to one of the low vacuum equipment. Compared with rotary vane vacuum pumps, it can be made as a pump with a large pumping speed; it is slightly more efficient than a water ring vacuum pump. The main disadvantage of this type of pump is the complex structure, larger volume, larger vibration during operation. In many cases it can be replaced by a liquid ring vacuum pump. Reciprocating vacuum pump works: The main components of the reciprocating pump cylinder 1 and reciprocating linear motion in which the piston 2, the piston is driven by the crank connecting rod mechanism 3 (including the crosshead) to complete. In addition to the main components mentioned above, there are also important components such as the exhaust Valve 4 and the intake valve 5 as well as the auxiliary components such as the base, crankcase, dynamic seal and static seal. During operation, driven by the motor, the piston in the cylinder reciprocates through the action of the crank-connecting rod mechanism. When the piston in the cylinder from the left to the right end of the movement, as the left cylinder chamber volume increases, the cylinder gas density decreases, and the formation of pumping process, this time the gas is drawn into the container through the intake valve 5 into Pump chamber left. When the piston reaches the rightmost position, the left chamber of the cylinder is completely filled with gas. Then the piston moves from the right end to the left end, at this time the intake valve 5 is closed. The gas in the cylinder is gradually compressed as the station piston moves from right to left. When the pressure in the cylinder reaches or slightly exceeds one atmosphere, the exhaust valve 4 is opened to vent the gas to the atmosphere to complete a duty cycle. When the piston moves from left to right, it repeats the previous cycle, and so on, and finally reaches a stable balance pressure within the pumping vessel. In order to improve the pumping efficiency, air intake valves and exhaust valves are generally provided at both ends of the cylinder, and then the intake ports and the exhaust ports at both ends of the cylinder are connected in parallel by pipes.