SNF Type 3 screw pump

SNF type three - screw pump USES: SN type three - screw pump, self - suction.Because the general assembly serialization of components has many structures, it can be used for horizontal, flange and vertical installation.

Heating or cooling structures can also be provided according to the needs of the medium being transported.Working principle of three screw pump, three screw pump is a push type positive displacement pump, the main part is the rotor and stator, the rotor is a big lead depth and smaller Canon of spiral screw (rotor) the double helix of the stator is matching with a screw, so in the space of the storage medium is formed between the stator and rotor, when running in stator and rotor, medium along the axial motion from the suction end to the eduction.

As can be seen from the above working principle, the three-screw pump has the following advantages:

1. Wide range of pressure and flow.The pressure is about 3.4-340 kg /cm 2, and the flow can reach 18600cm3/ min.

2. The type and viscosity range of liquid transportation is wide;

3. Because the rotary parts in the pump have low inertia force, high rotating speed can be used;

4. Good absorbance and self-absorption ability;

5. Uniform and continuous flow, low vibration and low noise;

6. Less sensitive to incoming gas and dirt than other rotary pumps;

7. Solid structure, easy installation and maintenance.

The disadvantage of three-screw pump is that the processing and assembly requirements of screw are high.The performance of pump is sensitive to the change of viscosity of liquid.

SNF type three screw pump application: used in heating equipment for fuel injection, fuel supply and transport pumps.Used in the mechanical industry for hydraulic, lubricating and remote control motor pumps.Used in the chemical, petrochemical and food industries as loading, transporting and supplying pumps.Used on ships for transport, pressurization, fuel injection and lubricating pumps and Marine hydraulic unit pumps.

The three-screw pump is a propulsive volumetric pump. Its main components are the rotor and stator

The matching double helix and screw sleeve thus form a space for the storage medium between the rotor and stator. When the rotor is running in the stator, the medium moves along the axial direction from the suction end.

Features of three-screw pump:

The screw sealing line that the stator contacts with the rotor completely separates the inlet and outlet cavities so that the pump has the function of isolating the valve

The mixing and transportation of liquid, gas and solid can be realized

The volume of fluid flow in the nozzle does not change during flow, and there is no turbulence and pulse

The volumetric cavity formed by the flexible stator can effectively reduce the abrasion consumption when transporting the medium containing solid particles

The input interfacial viscosity can reach 50000Mpa·s with 50% solids

The flow rate is proportional to the rotating speed, and the automatic adjustment of the volume can be realized with the help of the governor