Huangshan Saim Industrial Pump Manufacturing Co

Product introduction of series three-screw pump Structural features and advantages Description
Product overview of series three-screw pump:
Series three-screw pump is a fixed volume low-pressure axial conveyor of medium with certain lubricating properties without pulsation. Rotor pump is suitable for transporting fuel oil, lubricating oil, hydraulic oil, mineral oil and other oils and lubricating fluid liquids. The transported medium must not contain any abrasive particles and substances that are corrosive to the pump materials. The series of three-screw pumps have a spiral profile composed of a special profile (cycloid). When the motor or motor drives the active screw to rotate, its continuously moving sealed chambers gradually form a vacuum, and the liquid is sucked in through the suction port under the action of atmospheric pressure. And it is continuously transported to the discharge port along the axial direction without pulsation, without stirring and emulsification. The ability to form discharge pressure depends on the system load and the number of screw seal chambers, and is also related to the viscosity of the conveyed medium and the driving speed.
The driving screw and driven screw of the series three-screw pump adopt hydraulic balance devices. The transported liquid makes continuous and uniform axial linear motion in the pump chamber, with no pulsation, low noise, smooth operation, stable flow and pressure. Works smoothly and has little vibration.
The parts of the series three-screw pump are universally interchangeable and can be disassembled and replaced with corresponding parts. The pump has fewer parts, simple structure, light weight, easy installation, use and maintenance, high efficiency and long life.
The axial force of the driven screw of the three-screw pump is supported on the back cover or the driving screw, and is driven to rotate by hydraulic pressure. The driven screw is driven by hydraulic pressure. There is no machinery between the driving screw and the driven screw. Contact, between the screws, and between the screws and the pump casing are all protected by an oil film, so the screw profile only transmits hydraulic torque and is not subject to force, wear and mechanical friction. For all transmission parts, the medium is transported The oil film formed protects and lubricates.
The radial rotational runout of the main rod of the three-screw pump is positioned by the balance piston sleeve, which can also be called a sliding bearing, and the high-pressure chamber and the sealing chamber are separated by means of the gap between the balancing piston and the sleeve. A mechanical mechanism is installed in the sealing chamber. Sealed, no leakage, the oil return hole in the chamber is connected with the suction chamber of the pump, so it is not affected by the discharge pressure.
It has strong self-priming ability, saves energy and consumes less. It does not require a bottom valve and oil filling before starting the machine every time.
The combination series has a variety of structures, which can be used for horizontal, flange and vertical oil-immersed and suspended installations.
Heating or cooling structures can also be provided according to the needs of the transported medium.
For media with relatively poor lubricity, external bearing structures and metal bellows seals can be used. Guarantee the excellent service life of the three-screw pump.
In order to protect the pump motor and piping system, the pump must be equipped with an external or built-in safety valve device.
Types of media that can be transported:
Lubricating liquids: hydraulic oil, mineral oil, mechanical oil, lubricating oil, quenching oil, gear oil, transformer oil, turbine oil, water glycol, crude oil, animal and vegetable oils etc.
B Low lubricity liquids: light diesel, heavy diesel, fuel oil, fuel oil, heavy oil, residual oil, waxy thin oil, coolant, saponified liquid, etc.
Viscous liquids: various synthetic rubber liquids , artificial glue, emulsion, etc.
Three-screw pump performance characteristics:
Flow range: ~ / (L/min) ~/ (cubic/hour)
Pressure range: ~ (MPa ) ~ br (bar) / (kg force / square centimeter)
Transmission medium viscosity range: (centistokes)
Pumping temperature: ℃ (degrees Celsius)
Maximum allowable speed/(rev/ Minutes)
Series three-screw pumps
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 and delivery pumps.
Performance parameters (at speed r/, kinematic viscosity: ㎜/)
Flow rate: /Maximum working pressure:.
Installation form
The component combination is serialized, with various structures including base plate type, bracket type and column foot type. 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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Three screw pump application industries List
Used as fuel injection and combustion, diesel, fuel supply and transfer pumps, loading pumps, unloading pumps, and backfill pumps in heating equipment, fuel systems, burner systems, boiler heating systems, and thermal power plants.
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 port terminal crude oil pipeline services and in the collection, pressurization and loading of barges and ships, it is used to transport pressurized fuel injection and main engine lubrication pumps. Main engine lubrication oil pump 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.
Huangshan Saimu Industrial Pump Manufacturing Co., Ltd.