中文Rotary pump: Rotary pumps are classified according to their structural form
2020-10-15
Rotary pumps are divided into gear pumps, magnetic pumps, rotary piston pump bodies, flexible impeller pumps, sliding vane pumps, hose pumps, etc. according to their construction forms.
(1) Gear oil pump
Rotary pump. The key components of a gear oil pump include transmission gears, shafts, pump casings, pump covers, roller bearings, and sealing of bearing end caps. A rotating pump that transports liquids or increases them by utilizing the capacity transformation and movement generated between the pump casing and the gear engaged in gear transmission during operation. Gear oil pumps have two types of structures: external gear combination and internal gear combination. External gear oil pumps are further divided into double gear oil pumps, three gear oil pumps, and five gear oil pumps, with external gear double gear oil pumps being more common. A pair of meshing transmission gears and pump casing separate the suction and discharge chambers. When the transmission gear rotates, the capacity between the lips where the transmission gears loosen on the suction side gradually increases, the working pressure decreases, and the liquid enters the lips under the pressure difference effect. With the rotation of the transmission gear, the liquid between the lips is carried to the discharge chamber. At this point, the capacity between the lips of the transmission gear teeth on the cavity side gradually decreases, while the liquid is discharged.
(2) Magnetic pump
Rotary pump. A magnetic pump consists of a pump body and one or more extruder screws. The principle of a twin-screw pump is very similar to that of a gear oil pump, which uses the extruder screws that are interlocked with each other to suck liquid. Magnetic pumps are divided into single screw pumps, double screw pumps, and triple screw pumps based on the number of extruder screws. Among them, double screw pumps are divided into two categories: closed and non closed.
(3) Rotating piston pump body
Rotary pump. There are many types of structures for rotating piston pump bodies, among which the most common are cam pumps, Roots vacuum pumps, etc.
The cam pump is a multifunctional dual displacement pump, which is one of the excellent liquid conveying machinery equipment internationally. It uses two motor rotors for synchronized fitness exercise. The motor rotor is driven by a pair of external synchronized transmission gears, and the motor rotor rotates in the opposite direction under the push of the rotating shaft. The middle of the motor rotor and its contact with the pump casing only creates a gap line and surface sealing, which in turn forms a high vacuum value and sewage working pressure. It is especially suitable for the transportation of food, pharmaceutical, corrosive and low viscosity substances.
Roots vacuum pump and cam pump have a similar structural form, but the difference is that the liquid seal is also generated in the middle of the motor rotor. Large pumps are often arranged in a simple support layout, and their production and processing are simpler than cam pumps, with lower pressure than cam pumps.
(4) Flexible impeller pump
Rotary pump. Flexible impeller pumps belong to capacity rotor pumps. The flexible impeller pump consists of a flexible centrifugal impeller made of vulcanized rubber, a pump casing, a mechanical seal, and a drive shaft. When the centrifugal impeller rotates and leaves the axial force section of the pump body, the flexible centrifugal impeller leaves straighten, causing a vacuum pump. The liquid is sucked into the pump, and as the centrifugal impeller rotates, the liquid reaches the discharge side from the suction side. When the centrifugal impeller leaves contact the axial force section of the pump body, the capacity changes during operation, and the liquid is stably discharged from the pump.
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