Huangshan Saim Industrial Pump Manufacturing Co

Working principle of screw pump

When the screw pump works, the liquid is sucked into the sealing space surrounded by the thread and the pump shell. When the active screw rotates, the sealing volume of the screw pump is within the screw. The pressure of the screw pump increases under the squeeze of the teeth and moves along the axial direction. Since the screw rotates at a constant speed, the liquid outflow is also uniform.
Advantages of screw pump
As can be seen from the above working principle, screw pump has the following advantages:
)Wide pressure and flow range. The pressure is about kilogram force/, and the flow rate can be up to/min
) The type and viscosity of the transported liquid is wide
) Because the inertial force of the rotating parts in the pump is low, it can use a very high speed
/> )Good suction performance, self-priming ability
) Uniform and continuous flow, small vibration, low noise
) Compared with other rotary pumps, it is less sensitive to incoming gas and dirt
> )Solid structure, easy to install and maintain.
The disadvantage of the screw pump is that the processing and assembly of the screw require high performance, and the pump performance is sensitive to changes in the viscosity of the liquid.
Three-screw pump/twin-screw pump Product Overview Structural Features and Advantages Description
Three-screw pumps are used to transport media with a temperature of ℃ and a viscosity that does not contain solid particles, is non-corrosive and has lubricating properties. The applicable pressure range is mainly used in fuel transportation hydraulic engineering, shipbuilding engineering, petrochemical and other industries.
Three-screw pump transmission medium types Lubricating liquids: such as mechanical oil, lubricating oil, heavy oil, residual oil Low lubricity liquids: such as light diesel oil, heavy diesel oil, waxy thin oils Viscous liquids: such as various synthetic rubber liquids and artificial glues and emulsions.
Structural Features
The three-screw pump has a rotor hydraulic balance, small vibration, low noise, stable output, no pulsation pressure, high efficiency and strong self-priming ability. The parts adopt a highly versatile serial design. It has a variety of installation methods. It has a compact structure, small size and light weight. It can work at higher speeds with minimal mechanical friction, slight wear and long life. Heating or cooling structures can also be provided according to the needs of the transported medium. The medium is conveyed continuously in a straight line, no stirring, no pulsation, small vibration, low noise, low pressure, high efficiency, high structure, simple disassembly and assembly, small size, light weight, slight wear and long life. Mechanical seals are generally used. The pump is driven by an electric motor via a claw coupling. When viewed from the extended end of the main shaft towards the pump, it rotates clockwise.


Scope of application
Mainly used to transport lubricating liquids with medium and low viscosity
,
In industrial production, they are often used as hydraulic pumps, lubrication pumps, light fuel pumps Pump.
Performance parameters (at speed
r/
, kinematic viscosity
:
㎜
/
)
Flow rate
:
/
Maximum working pressure:
.
Installation form
Serialization of component combinations
,
There are many types of base plate type (
) bracket type (
) column foot type (
) kind of structure. It can be used for horizontal flange and vertical installation, and the pump inlet and outlet directions can be changed left and right.
Has self-priming ability.
Special design and production can be carried out according to the special requirements of users.
Specifications and models


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Application Industry List
In heating equipment, fuel system, burner system, boiler heating system, thermal power plant, it is used as fuel injection, diesel, fuel supply and transfer pump, loading pump, oil unloading pump, and backfill pump.
In the metallurgical and steel plant industry, it is used as a lubrication pump in the lubrication system, as an oil supply pump in the hydraulic system, as a combustion pump in the combustion system, and as a transport backflow pump in the oil depot.
We make liquid supply pumps, oil supply pumps, booster oil pumps, circulation pumps, lubricating oil pumps and remote control motor pumps, and three-screw oil pump devices in mechanical machine lubrication, gear transmission lubrication, and large oil film bearing oil supply circulation cooling systems.
In the hydraulic elevator industry, it is used as a hydraulic pump in the hydraulic transmission device, and in the chemical industry, it is used as a delivery pump for resin, pigment, latex, ink, paint, glycerin, and paraffin.
In the petroleum refinery refining industry, it is used to transport crude oil, heavy oil residue, asphalt tar emulsion, and is used in the refining process of high-temperature viscous products, such as asphalt vacuum tower bottom oil and residual fuel loading, transportation and liquid supply pumps.
In the engine room of oil tankers, cargo ships, merchant ships and many combat ships, in crude oil pipeline services at ports and terminals, and in the collection, pressurization and loading of barges and ships, it is used to deliver pressurized fuel injection and main engine lubrication pumps and main engine lubrication oil pumps. Three-screw pumps are also widely used in lubricating oil pumps and marine hydraulic pumps, marine hydraulic pumps, windlass hydraulic winch drive pumps, etc.,
Lubrication of oil delivery systems, fuel treatment systems, etc. in shipyards/machine building plants such as separators, superchargers, engines, etc. Oil systems are also widely used in lubrication and hydraulic systems in propulsion systems.
It is also widely used in industrial fields such as oil fields and offshore platforms to transport crude oil, latex liquid, etc.
In the food industry, it is used in oil factories, wineries and food factories to transport edible oil, animal oil, vegetable oil, and alcohol. , honey, sugar juice, toothpaste, milk, cream, chocolate
In the building materials industry, it is used as ignition oil pump and heavy oil fuel pump in the kiln of the glass factory, ceramic factory, refractory material factory, cement factory,