Thermal-insulated three-screw pumps are used to transport media with a temperature of ℃ and a viscosity of -, and the three-screw pump does not contain solid particles, is non-corrosive, and has lubricating properties. Three-screw pumps are mainly used in fuel transportation, hydraulic engineering machinery industry and heavy machinery industry, three-screw pump ships and offshore engineering, oil tanks and printing and dyeing industry, chemical industry, petrochemical industry and other industries.
Three-screw pumps include marine type and special types of three-screw pumps. This type of pump is a rotor-type positive displacement pump. Due to the mutual meshing of the spiral grooves on the driving screw and the driven screw and their cooperation with the inner surface of the three holes of the bushing, the pump can Several stages of dynamic seal chambers are formed between the inlets. These dynamic seal chambers will continuously move the liquid axially from the pump inlet to the pump outlet.
The three-screw pump increases the pressure of the delivered liquid step by step to form a continuous, smooth, axially moving pressure liquid.
The liquid delivered by the thermal insulation screw pump is a variety of lubricating liquids that do not contain solid particles, non-corrosive oils and similar oils. The viscosity of the liquid delivered is.-(.-) High-viscosity liquids can also be heated to reduce viscosity. After delivery. Flow range. / Maximum working pressure r Maximum temperature ℃.
The three-screw pump has a simple structure: it has a variety of structural forms. Three-screw pumps generally have small flow rates. ． /The pump body and bushing of the pump are combined into one (collectively referred to as the pump body). The shaft seal is an end mechanical seal. For pumps with medium flow or above, the bushing is a separate part fixed in the pump body. Large flow pumps are mostly made of double-suction structure and horizontally installed shaft seals. Depending on the transmission medium, there are two types of end mechanical seals and packing seals. Marine pumps are installed in two types: horizontal and vertical, and the prime mover is an AC or DC marine motor.
Long life: the active screw of the three-screw pump is driven by an electric motor. There is no mechanical contact between the main and slave rods, but is driven by the supplied pressure liquid to rotate around the axis. Between the master and slave rods, the screw and the bushing There is a layer of oil film protection between them, so the mechanical friction of the three-screw pump is extremely small and its lifespan can be called semi-permanent.
. The transported liquid moves in an axial and uniform linear motion in the three-screw pump, so the pressure pulsation is small, the flow rate is stable, and the noise is low. Due to the small inertia of the rotating part, the starting torque and vibration are small
. The three-screw pump has high suction Capacity: Safety of three-screw pump motor and piping system. Screw pumps with medium flow and above are equipped with safety valves when the pressure exceeds the set pressure of the safety valve. High-pressure oil will flow back to the pump's oil inlet.
Characteristics of the insulated screw pump
Wide pressure and flow range, flow range.~/Maximum working pressure up to.
Wide range of types and viscosity of transported liquids
Because of the three-screw pump The inertia force of the rotary part is low, so it can use very high speeds
Good suction performance and self-priming ability
Uniform flow, continuous vibration, small noise, and low noise
Compared with other rotary pumps, it has less impact on the incoming gas and Not very sensitive to dirt
The three-screw pump has a solid structure and is easy to install and maintain
Strong self-priming ability
Due to the serialization of universal combinations of components, a variety of structures can be used for horizontal flange and vertical installations
Heating or cooling structures can also be provided according to the needs of the transported medium
Purpose and application scope of three-screw pumps:
It can be used as a subsequent pump and a delivery pump in heating equipment.
Used as a delivery and refueling pump in the oil delivery system
In the machinery industry, it can be used as a hydraulic pump, lubrication pump and remote control motor pump.
It can be used as a liquid supply pump in the chemical, petrochemical and food industries.
Used as transfer pumps, booster pumps, fuel injection and lubricating oil pumps and marine pumps on ships.
Widely used in petroleum, electric power, chemical fiber, shipbuilding, metallurgy, glass, machinery, machine tools, highways and other industries.
Suitable for transporting fuel oil, hydraulic oil, lubricating oil, asphalt, crude oil and other lubricating liquids similar to oil.
Insulated three-screw pump, 80×2-46 asphalt screw pump