The main working parts of a single screw pump are composed of a sleeve (stator) with a double-headed spiral cavity and a single-headed eccentric screw (rotor) meshed with it in the stator cavity. Since the medium of a single screw pump is pushed axially and evenly to flow, the internal flow velocity is low, the pressure is stable, and no eddy current or agitation is generated; it is suitable for conveying high viscosity, containing solid particles or high fiber, and requiring continuous and stable pressure.
One of the twin-screw, three-screw, and five-screw pumps is an active screw, which is a right-handed convex screw, and the rest are driven screws, which are left-handed concave screws. When the screw rotates, the volume of the suction chamber increases and the pressure decreases. The liquid enters the suction chamber along the suction pipe under the action of the pressure difference between the inside and outside of the pump. As the screw rotates, the liquid in the sealed chamber moves continuously and evenly along the axial direction to the discharge chamber. As the volume of one end of the discharge chamber gradually decreases, the liquid is discharged.
A twin-screw pump is an externally meshed screw pump, which uses two screws that mesh with each other and do not contact each other to pump liquid. The unique structure enables it to realize non-stirring, non-pulsating and stable conveying of various media; because the pump body structure ensures that the pumping liquid is always present in the working element of the pump as a sealing liquid, the twin-screw pump has a strong self-priming ability, and its special design also ensures that the pump has a high suction performance, that is, a very small NPSHr value.
The three-screw pump is mainly composed of a bushing fixed in the pump body, an active screw inserted in the pump cylinder, and two driven screws meshing with it. Since the two driven screws mesh symmetrically with the active screw, the radial force acting on the active screw of the three-screw pump is completely balanced, and the active screw does not bear bending load. The radial force on the driven screw is supported by the pump cylinder bushing along its entire length, and no bearing is required at the outer end, and it basically does not bear bending load. The remarkable features of the three-screw pump are simple structure, small pressure pulsation, stable flow, stable and reliable operation, high speed, low noise, high efficiency, long life, and self-priming ability.
Wide pressure and flow range;
Wide range of types and viscosities of transported liquids;
High speeds can be used because the rotating parts in the pump have low inertia;
Good suction performance and self-priming ability;
Uniform and continuous flow, low vibration and low noise;
Less sensitive to incoming gas and dirt than other rotary pumps;
Solid structure and easy installation and maintenance.
Introduction The Allweiler progressive cavity pump is renowned for its exceptional performance and reliability, making it a staple in various industrial applications. This pump design allows it to handle a wide range of fluids, including viscous liquids and those containing solid particles. This article will provide an overview of the Allweiler progressive cavity pump, including…
Overview of Progressive Cavity Pumps Progressive cavity pumps are designed to transport viscous fluids. Their structure allows for the formation of multiple cavities within the pump body, enabling continuous fluid transfer. Key characteristics of these pumps include: Importance of the Aftermarket The aftermarket plays a crucial role in the lifecycle of progressive cavity pumps. Its…
In the industrial and engineering sectors, progressive cavity pumps are widely recognized for their unique operating principles and broad applications. This article will explore the structure, working mechanism, advantages and disadvantages, and applications of progressive cavity pumps. Basic Structure of a Progressive Cavity Pump A progressive cavity pump mainly consists of the following components: Working…
Introduction Progressive cavity pumps are essential devices widely used in various industrial sectors. Their unique structure and operating principle enable them to effectively transport viscous fluids and those containing solid particles. This article explores the basic construction, working principle, key features, and application areas of progressive cavity pumps. Basic Construction of Progressive Cavity Pumps The…
In the industrial and engineering sectors, progressive cavity pumps (PCPs) are gaining significant attention due to their unique design and superior performance. The working principle and wide application range of these pumps make them essential equipment in many industries. This article explores the basic concepts, working principles, main features, and common applications of progressive cavity…
Working Principle The core working principle of the screw pump is to use the rotational motion of the screw to transport fluid. Its structure usually consists of one or more screws and a fixed pump housing. As the screw rotates, the fluid is gradually pushed between the screw and the pump housing, thereby achieving continuous…
Parameters Performance: Non-blocking Material: Fluorine-lined Drive: Electric Flow: 51 m3/h Suction diameter: 150 mm Discharge diameter: 150 mm Speed: 230 rpm Lift: 120 m Model: BN1-12L Brand: seepex Through precise manufacturing processes, BN1-12L Stator ensures high-precision fit. Such a design not only improves the efficiency of the pump, but also reduces energy consumption, making the…
Parameters Brand: SEEPEX Suction diameter: DN10 (mm) Performance: Wear-resistant Discharge diameter: DN10 (mm) Flow rate: 0.1-0.7 (m³/h) Efficiency: 98% Drive mode: Electric Output flow: 200 Power: 0.55kW Shaft power: 0.55 Number of impellers: Single stage Working temperature: Normal temperature Pump shaft position: Horizontal Application: Metering pump Lift: 60m Material: Stainless steel Speed: 298 (rpm) Model:…
Parameters Brand: SEEPEX Impeller structure: Single impeller Flow rate: 50m³/h Impeller suction mode: Single suction Voltage: 380V Product features: Miniature Weight: 50kg Performance: High pressure Pressure: 1.2Mpa Application scope: Pharmaceuticals Lift: 120m Working pressure: 1.2 Drive mode: Electric Application: Metering pump Pump shaft position: Horizontal Material: Stainless steel Conveying medium: PAM Model: MD003-12 The MD003-12…
Parameters Main features of BN70-18L Excellent performance The design of BN70-18L pump fully considers the characteristics of fluids and can deliver various viscous substances at a stable flow rate and pressure. Whether it is a high-viscosity liquid or a mixed liquid, the pump can maintain excellent efficiency. Structural design BN70-18L pump adopts an advanced screw…
