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Brushless DC water pump VS brush water pump
Time:2021-06-26Click volume:

The brushless magnetic pump is a kind of non-contact torque transmission through magnetic transmission, which replaces the dynamic seal with static seal, makes the pump complete, solves the problem of "running, emitting, dripping, and leaking", and eliminates the flammable, inflammable, chemical industry in the refining and chemical industry. The potential safety hazards of explosive, toxic, and harmful media leaking through the pump seal effectively guarantees the physical and mental health of employees and safe production.

The working principle of brushless DC pump

Before understanding the working principle, let's take a look at the structure of the brushless DC magnetic drive pump. The magnet and the impeller of the brushless DC magnetic drive pump are injection molded into one body to form the rotor of the motor. There is a bushing directly injection molded in the middle of the rotor, which is fixed in the shell through a high-performance ceramic shaft. The stator and circuit board of the motor adopt ring Oxygen resin glue is potted in the pump body, and there is a thin-walled isolation between the stator and the rotor, which does not need to be equipped with a traditional mechanical shaft seal, so it is completely sealed.

Brushless DC water pump VS brush water pump

The torsion of the motor is the magnetic field generated by the coil on the stator to drive the permanent magnet (rotor) to work. The magnet is magnetized in n (n is an even number) stage, so that the magnet parts form a complete coupling magnetic system with each other. When the magnetic poles produced by the stator coils are opposite to the magnetic poles of the magnet, that is, the displacement angle between the two magnetic poles Φ=0, the magnetic energy of the magnetic system is the lowest at this time; when the magnetic poles rotate to the same poles, the displacement between the two magnetic poles The angle Φ=2π/n, the magnetic energy of the magnetic system is the maximum at this time. After removing the external force, since the magnetic poles of the magnetic system repel each other, the magnetic force will restore the magnet to the lowest magnetic energy state. Then the magnet moves and drives the magnetic rotor to rotate.

The brushless DC water pump adopts electronic commutation without using carbon brushes. Both the magnet rotor and the stator have multi-pole magnetic fields. When the magnet rotor rotates an angle relative to the stator, the magnetic pole direction will be automatically changed, so that the rotor always maintains the same pole repulsion, so that the The brush DC magnetic isolation pump has higher speed and efficiency.

The stator and rotor of the magnetic isolation pump are completely isolated, completely avoiding the liquid leakage problem of the traditional motor-type brushless DC pump. And it can be used completely submersible and completely waterproof, which effectively improves the service life and performance of the pump.

Compared with ordinary brushed water pumps, brushless water pumps have the following advantages:

1. The pump shaft changes from a dynamic seal to a closed static seal, completely avoiding medium leakage. It can be used both amphibiously and completely waterproof. The stator part and the rotor part of the magnetically isolated water pump are completely isolated, and the stator and circuit board parts are potted with epoxy resin, which is 100% waterproof.

2. Low power consumption, high efficiency, no need for independent lubrication and cooling water, reducing energy consumption.

3. The brushless DC water pump adopts electronic components for commutation, without carbon brush commutation. The rotor part uses permanent magnets, and the water pump body uses environmentally friendly materials. Using high-performance wear-resistant precision steel shaft and sleeve, the sleeve is integrated with the rotor through injection molding to avoid wear, so the service life of the brushless DC magnetic water pump is greatly enhanced.

4. It has a damping and vibration reduction effect, which reduces the impact of motor vibration on the pump and the impact on the motor when the pump occurs cavitation vibration.

5. The noise can be as low as 35dB or less.

6. Various required parameters can be adjusted through the winding of the stator, and it can be operated at a wide voltage.

7. The rotor will slip on the ceramic shaft when overloaded, which will protect the motor and pump.

Application range:

Can be used for computer water cooling systems, fountains, coffee machines, water dispensers, tea brewers, soilless culture, showers, dental scrubbers, water heater pressurization, plumbing mattresses, hot water circulation, swimming pool water circulation filtration, massage bathtubs, car cooling Circulation system, humidifier, air conditioner, washing machine, medical equipment, cooling system, bathroom products.