The series three-screw pump is an axially conveying volumetric low-pressure rotor pump. It consists of a spiral profile composed of a special shape curve. When the active screw rotates, the moving seal cavity sucks the liquid from the inlet and continues along the axial direction. Pulsation-free delivery to the discharge port, the pump runs smoothly and has low noise. The axial force of the master and slave rods adopts a hydraulic balance device, and the slave rods are driven to rotate by hydraulic pressure, so the screw has no wear and long service life. The pump adopts a mechanical seal and has a leak-free structure. Simple, compact, high efficiency, strong self-priming ability, good energy saving effect, and easy to install, use and maintain.
The series of three-screw pumps can transport a variety of different liquids that do not contain solid particles, are non-corrosive and have lubricating properties. The medium viscosity is ~/, the flow range is ~/, the maximum pressure, and the maximum temperature are ℃. It is widely used in machinery, petrochemical, metallurgy, electric power, shipbuilding and food industries.
Specifications and models
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Three screw pump application industries List
●Used as fuel injection fuel injection, diesel fuel, fuel supply and transfer pump, loading pump, oil unloading pump, and backfill pump in heating equipment fuel system burner system boiler heating system thermal power plant.
●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.
●In mechanical machine lubrication, gear transmission lubrication, large oil film bearing oil supply circulation cooling system, 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.
●Hydraulic elevators are used as hydraulic pumps in hydraulic transmission devices in the lift industry, and as delivery pumps for resins, pigments, latex inks, paints, glycerin, and paraffin in the chemical industry.
●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 oil pumps and lubrication oil pumps. Three-screw pumps are also widely used in marine hydraulic pumps, marine hydraulic pumps, anchor machines, hydraulic winch drive pumps, etc.
●In shipyards/machine
manufacturers, such as separators, superchargers, engines, etc. Oil delivery systems, fuel treatment systems, lubricating oil systems It is 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, and vegetable oil. , 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,
Important instructions on the selection and configuration of the three-screw pump unit and the precautions for use and startup: (for reference by design institutes and on-site installation and maintenance personnel)
Idling without medium is strictly prohibited. Please be sure to add lubricating medium or transport before starting the operation. medium.
It is strictly forbidden to allow any debris, welding slag, etc. to enter the pump cavity. Be sure to keep the pump cavity and the inside of the pipeline clean.
It is strictly prohibited to use pipeline filters or type filter devices. When configuring a filter, please ensure that the filtration area is times the cross-sectional area of the pump inlet diameter. And correctly configure the mesh number of the filter according to the cleanliness of the media.
It is strictly forbidden that the inlet and outlet pipes of the pump do not match the inlet and outlet pipes of the pump. The pipe diameter configuration must be consistent with the inlet and outlet diameters of the pump. To avoid cavitation or failure to self-prime. If the pipeline is too thin, it will inevitably lead to cavitation, which will cause the pump to work in an under-fed state, resulting in a drop in flow pressure of the three-screw pump unit or even abnormal vibration and noise. Long-term operation will also cause serious damage to the jammed pump and the screw pump.
The installation height of the three-screw pump must fully consider the cavitation conditions of the pump and the self-priming ability of the pump (the cavitation margin is related to the viscosity of the medium, the speed and the lead of the screw)
Due to packaging, transportation, lifting, loading and unloading, The tightening effect of pipe bolts may easily cause the original factory positioning of the pump to change or even be seriously misaligned. Therefore, after the three-screw pump unit piping configuration is installed and fixed, the coaxiality of the three-screw pump and motor must be rechecked before starting the vehicle. .
It is strictly prohibited to start the machine with back pressure or with the inlet and outlet valves closed.
It is strictly prohibited to start the rotation in a direction that does not comply with the pump rotation mark.
When two pumps are connected in parallel, one-way valves must be added at the outlet and inlet of the pump to prevent backflow of the medium from driving the three-screw pump in reverse.
It is strictly prohibited to adjust the safety valve bolts at will. The safety valve is only used to protect the safety of the pump and match the motor power with the working status of the pump. It is strictly prohibited to be used as a pressure regulating valve or a relief valve.
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