G type screw pump is a single-screw pump, screw pump can be divided into single screw pump, twin screw pump, three screw pump.
How do for single screw pump selection, and the centrifugal pump, diaphragm pump and other pump compared to what are the different?
One, the key points of single screw pump selection, the choice of the single screw pump is mainly focused on the following parameters: 1, the material selection, different medium, different material combinations.
2, single screw pump pressure to determine: single screw pump output pressure is based on liner series bushing (
The number of lead to determine: 1 level: the working pressure of 0.
Level 2: work pressure of 1.
Level 4: working pressure of 2.
Due to the transmission medium is different, for medium containing serious wear and tear ', according to the requirements of delivery pressure to select suitable stator series.
3, performance: the general performance of the single screw pump table or characteristic curve are in 20 ℃ water as medium,
Viscosity is 1 CST)
When data for conveying flow under different viscosity and shaft power is different.
4, the choice of single screw pump speed: single screw pump because of its structure characteristics, most used in the transmission of high viscosity liquid and liquid containing particles, so the choice of the revolution is critical.
The main basis for the selection of single screw pump speed medium wear and the medium viscosity.
5, pump drive mode: because of the single screw pump for low speed pumps, water pump
drive mode is more, generally have low speed motor straight league (
, driven gear reduction motor, stepless variable speed motor drive, etc.
6, selection of single screw pump bushing rubber materials: single screw pump bushing for rubber products, is also one of the single screw pump parts, it is the choice of good or bad, directly affect the service life of bushing and normal life of the lining sleeve for the cases for 3 -
6 months, if choose undeserved, bushings may be falling off or rubber from the steel pipe.
7, shaft seal: according to the need and transmission medium, can adopt mechanical seals and packing seal, and these two kinds of structure are interchangeable.
Second, the single screw pump and the pump is single screw pump is a new kind of method of rotary displacement pump.
The main working parts are eccentric screw (
And fixed bushings (
Compared with other pumps, single screw pump has its own unique advantages: 1, compared with the diaphragm pump, single screw pump can transport all kinds of mixing impurities, medium containing gas and solid particles or fiber, also can transport all kinds of corrosive substances.
2, compared with a centrifugal water pump, single screw pump doesn't need to install the valve, the flow is stable linear flow.
3, compared with the plunger pump, single screw pump has better ability of imbibition.
4, compared with the gear pump, single screw pump can transport high viscosity material.
5, plunger pump, diaphragm pump, gear pump, single screw pump can be used in the pharmaceutical filling and metering.
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