QHCP magnetic pump manufacturer

Product Overview

Magnetic centrifugal pump is a high-tech product that applies the working principle of permanent magnet coupling to centrifugal pumps. It is designed reasonably and has the characteristics of full sealing, no leakage, and corrosion resistance. Magnetic centrifugal pumps can be widely used in chemical, acid, alkali, smelting, rare earth, pesticide, dye, pharmaceutical, papermaking, electroplating, acid washing, radio, foil forming, petroleum, food, film photography and printing, scientific research institutions, national defense industry and other units to pump acid, alkali, rare and valuable oil liquids, venom, volatile liquids, especially for the transportation and pressurization of easily leaking, flammable and explosive liquids.QHCPmagnetic drive pumpIt is an ideal green chemical equipment that will bring high economic and social benefits to chemical, petrochemical, pharmaceutical, and printing and dyeing production enterprises in terms of increasing production and reducing expenses, eliminating pollution, protecting the environment, ensuring safety production, and labor protection.

structural principle

The magnetic chemical centrifugal pump consists of three parts: centrifugal pump, magnetic drive, and electric motor. The key component of the magnetic transmission is composed of an outer magnetic rotor, an inner magnetic rotor, and a non-magnetic isolation sleeve. When the electric motor drives the outer magnetic rotor to rotate, the magnetic field can penetrate the air gap and non-magnetic substances, driving the inner magnetic rotor connected to the impeller to rotate synchronously, achieving non-contact transmission of power and transforming the dynamic seal into a static seal.

The magnetic self-priming centrifugal pump adopts an external mixed axial return water pump body structure design, which consists of a suction chamber, a storage chamber, a volute shell, a reflux hole, a gas-liquid separation chamber, and other parts. After the pump is started, under the action of centrifugal force, the remaining liquid in the suction chamber and the air in the inlet pipeline are stirred by the impeller to form a gas-liquid mixture. The mixture enters the gas-liquid separation chamber through the volute shell, and as the flow rate decreases, it causes gas-liquid separation. The air is discharged from the pump outlet. The driving device of the magnetic self-priming pump adopts an active magnetic coupling directly installed on the motor shaft, which indirectly drives the impeller on the rotor combination to rotate through magnetic coupling. The pump chamber is completely enclosed and has no leakage.

The magnetic high viscosity centrifugal pump consists of a disc pump, a magnetic drive, and an electric motor. The energy transfer from the impeller to the liquid flow in a disc impeller centrifugal pump occurs under the frictional force of the boundary layer of the rotating disc. When the liquid enters the pump, its molecules bind to the surface of the disk, forming a boundary layer. As the pump rotates, energy transfer occurs to the subsequent layer of liquid molecules between the disks. The strong pressure field formed in this way 'drags' the product out of the pump in layers (i.e. not affected by fluid fluctuations). According to the different physical and chemical properties, wear resistance, and corrosiveness of the conveying medium, the materials of overcurrent components are divided into two categories: metallic and non-metallic.

structural characteristics

1. Permanent magnets made of rare earth permanent magnet materials have a wide working temperature range (-45-400 ℃), high coercivity, and good anisotropy in magnetic field direction. They also do not experience demagnetization when they are close to the same polarity, making them an excellent magnetic field source.

When using a metal isolation sleeve, the isolation sleeve is in a sinusoidal alternating magnetic field, inducing eddy currents on a cross-section perpendicular to the magnetic field lines and converting them into heat. The expression for eddy current is: where Pe eddy current; K-constant; The rated speed of the n-pump; T-magnetic transmission torque; F - Pressure inside the spacer; D - Inner diameter of spacer sleeve; The resistivity of a material; -The tensile strength of the material. After the pump is designed, n and T are given operating conditions, and reducing vortex can only be considered from aspects such as F and D. The use of non-metallic materials with high resistivity and strength to make isolation sleeves has a significant effect in reducing eddy currents.

When the control pump for cooling lubricant flow is running, a small amount of liquid must be used to flush and cool the annular gap area between the inner magnetic rotor and the isolation sleeve, as well as the friction pair of the sliding bearing. The flow rate of the coolant is usually 2% -3% of the pump design flow rate, and the annular gap area between the inner magnetic rotor and the isolation sleeve generates high heat due to eddy currents. When the cooling lubricant is insufficient or the flushing hole is not smooth or blocked, it will cause the medium temperature to be higher than the working temperature of the permanent magnet, gradually causing the inner magnetic rotor to lose magnetism and the magnetic transmission to fail. When the medium is water or water-based liquid, the temperature rise in the annular gap area can be maintained at 3-5 ℃; When the medium is hydrocarbons or oil, the temperature rise in the annular region can be maintained at 5-8 ℃.

4. Sliding bearingsQHCPmagnetic drive pumpThe materials for sliding bearings include impregnated graphite, filled polytetrafluoroethylene, engineering ceramics, etc. Due to the excellent heat resistance, corrosion resistance, and friction resistance of engineering ceramics, the sliding bearings of magnetic pumps are often made of engineering ceramics. Due to the brittleness and low expansion coefficient of engineering ceramics, the bearing clearance must not be too small to avoid shaft hugging accidents. Due to the fact that the sliding bearings of the magnetic pump are lubricated with the medium being conveyed, different materials should be selected to make the bearings according to different media and operating conditions.

5. Protective measures: When the driven components of the magnetic transmission operate under overload or the rotor gets stuck, the main and driven components of the magnetic transmission will automatically slip, protecting the pump. At this time, the permanent magnet on the magnetic actuator will generate eddy and magnetic losses under the action of the active rotor alternating magnetic field, causing the temperature of the permanent magnet to rise and the magnetic actuator to slip and fail.

Product Features

1. The pump shaft has changed from a dynamic seal to a closed static seal, which avoids medium leakage.

2. No need for independent lubrication and cooling water, reducing energy consumption.

3. Low noise, low power consumption, high efficiency, and damping effect, reducing the impact of motor vibration on the pump and the impact of pump cavitation vibration on the motor.

When overloaded, the inner and outer magnetic rotors will slip relative to each other, providing overload protection for the motor and pump. Easy to install, disassemble, and maintain, reducing the difficulty and labor intensity of equipment maintenance, and improving the work efficiency of the pump unit.

5. It can purify the environment, eliminate pollution, protect the safety of operators, and achieve civilized production.