Introducing the brushless DC pump

Brushless DC Pump refers to a machine that uses DC 4.5V～24V to drive a brushless motor. The rotation of the brushless motor drives the rotation of the impeller, thereby increasing the pressure of the liquid to achieve the effect of transferring the liquid.

The brushless DC water pump (magnetic isolation pump) is composed of the pump body (isolator), motor stator, shaft, bearing and rotor blades (magnet and impeller):

magnet

Permanent magnets made of rare earth permanent magnet materials have a wide operating temperature range (-45-400°C), high coercivity, and good anisotropy in the direction of the magnetic field. Demagnetization will not occur when the same poles are close. It is a good source of magnetic field.

Spacer

        When the metal isolating sleeve is used, the isolating sleeve is in a sinusoidal alternating magnetic field, and eddy current is induced in the section perpendicular to the direction of the magnetic force and converted into heat. The expression of eddy current is: where Pe-eddy current; K-constant; n-rated speed of pump; T-magnetic transmission torque; F-pressure in the spacer; D-inner diameter of the spacer; resistivity of a material;-material The tensile strength. When the pump is designed, n and T are given by the working conditions. To reduce the vortex, only F and D can be considered. The isolation sleeve is made of non-metallic materials with high resistivity and high strength, which is very effective in reducing eddy current.

      Because the brushless DC magnetic isolation pump works by driving the rotor to rotate by the energized coil, in order to maintain the stable rotation and noise of the rotor, the high-performance ceramic shaft and sleeve are used to achieve high accuracy and effectively reduce the rotation. Resistance and noise.

Sliding bearing

The material of the sliding bearing of the magnetic pump is engineering plastic plastic steel (POM) or ceramics. Because plastic steel (POM) and ceramics have good heat resistance, corrosion resistance, and friction resistance, the sliding bearings of magnetic pumps are mostly made of engineering ceramics. Because engineering ceramics are very brittle and have a small expansion coefficient, the bearing clearance must not be too small to avoid shaft hung accidents.

Since the sliding bearing of the magnetic pump is lubricated by the conveyed medium, the bearing should be made of different materials according to different media and operating conditions

Brushless DC magnetic drive water pump:

The brushless DC water pump adopts electronic component commutation, without carbon brush commutation, and adopts high-performance wear-resistant ceramic shaft and ceramic bushing. The bushing is integrated with the magnet through injection molding to avoid wear, so the brushless DC magnetic force The life of the type water pump is greatly enhanced. The stator part and the rotor part of the magnetically isolated water pump are completely isolated. The stator and circuit board parts are potted with epoxy resin, 100% waterproof, the rotor part is made of permanent magnets, and the water pump body is made of environmentally friendly materials, with low noise, small size and performance stable. Various required parameters can be adjusted through the winding of the stator, and it can be operated at a wide voltage.

Advantages: long life, low noise up to 35dB or less, can be used for hot water circulation. The stator and circuit board of the motor are potted with epoxy resin and completely isolated from the rotor. They can be installed underwater and are completely waterproof. The shaft of the pump adopts a high-performance ceramic shaft with high precision and good shock resistance.

Features

1. Long life, no maintenance, small size, high efficiency, low power consumption
　　2. Excellent design structure: the water pump head is connected to the motor rotor cavity, and the motor rotor cavity is completely isolated from the motor stator, so that it is completely waterproof and leak-proof and the motor water pump High efficiency
　　3. Safety and health, environmental protection and energy saving (because the brushless is electronically controlled commutation, no sparks are generated, no carbon brush dust pollution).
　　4. The axis of the water pump adopts high-performance ceramic shaft, which has high precision, good wear resistance and extremely low sound. It can be used for water bed circulation, water bed heating, etc.

5. The three-phase DC water pump in the water pump can realize PWM speed regulation, analog signal input speed regulation, and potentiometer manual speed regulation, which can realize the adjustment of head and flow.
　　6. Three-phase brushless water pump, with impeller rotor jam protection, reverse connection protection, overload protection, and overcurrent protection.
　　7. The three-phase brushless water pump is controlled as a soft start, no impact, and low starting power consumption.
　　8. The pump can be fully submerged or not submersible (the installation position is less than the liquid level)
　　9. The pump can be customized according to user requirements and designed according to customer requirements