--(DC30 series Size 34mmx36mmx39mm)
Voltage range: DC4.5v-12v; Lift range: 0.4m-3m; Flow rate range: 100-260L/H
--(DC40 series Size 86mmx63mmx48mm)
Voltage range: DC 6v-24v; Lift range: 1.5m-7m; Flow rate range: 246-700L/H
--(DC50 series Size 100mmx84mmx64mm)
Voltage range: DC12v-24v; Lift range: 1.55m-14m; Flow rate range: 1030-3600L/H Features:
1. Life expectancy of up to 10 years, no maintenance, small size, high efficiency, low power consumption
2. Motor stator and circuit board part of the epoxy resin potting and complete isolation from the rotor, to solve the motor type DC pump long-term diving water leakage problems, can be installed underwater and completely waterproof
3. The same voltage can be made of a wide range of parameters, such as 24V pumps can be made into a head of 2 meters. The same voltage can be made into a variety of parameters, such as 24V pump can be made into a head of 2 meters, can also be made into a head of 7 meters. The pump can be operated with wide voltage, for example, the 24V pump can be operated under 24V.
4. The shaft of the pump adopts high-performance ceramic shaft, high precision, good seismic resistance, because the pump adopts ceramic shaft sleeve and ceramic shaft precision cooperation, the noise is less than 35 decibels, the power of a little less can even reach 30 decibels or less, almost to achieve the effect of silence.
5. Three-phase non-Hall program-driven DC water pump in the pump can achieve PWM speed control, analog signal input speed control, potentiometer manual speed control, so that the flow and head can be adjusted, you can order a musical fountain. Three-phase DC water pump with jamming protection, reverse connection protection.
6. The pump has been configured according to customer demand 4-point pipe thread or 6-point pipe thread to meet the needs of special customers.
7. Multi-functional design, can be submersible use can also be placed outside (installation position below the liquid level)
8. Can be customized according to user requirements and according to customer requirements to design the pump
Remarks:
Maximum temperature of the liquid 60 to 100 degrees
Application:
Can be used for computer water-cooling systems, solar fountains, desktop fountains, water fountains and other water-cooling systems, water-cooling systems for computers and other water-cooling systems, water-cooling systems for computers and other water-cooling systems. Solar fountain,desktop fountain,handicrafts,coffee machine,water dispenser,tea maker,wine pourer,soilless culture,shower,gynecological washers,teeth cleaner,water heater pressurization,plumbing mattress,hot water circulation,swimming pool water circulation filtration,foot washing surfing and massage basin,surfing and massage bathtub,automobile cooling circulatory system,gasoline dispensers,humidifiers,air conditioning machines,washing machines,medical equipment,cooling system,sanitary ware products. Brushless DC magnetic drive pump magnet and impeller injection molded into one piece to form the rotor of the motor, the rotor in the middle of the direct injection molding of the bushing, through the high-performance ceramic shaft is fixed in the casing, the stator of the motor and the circuit board part of the use of epoxy resin adhesive potted in the pump body, the stator and the rotor have a layer of thin-walled isolation between the stator and the rotor without the need to match with the traditional mechanical shaft seals, and therefore completely sealed. The torque of the motor is generated by energizing the coil on the silicon steel sheet (stator) to produce a magnetic field to drive the permanent magnet (rotor) to work and run. The magnets are magnetized in n (n being an even number) stages so that the magnet parts form a complete coupled magnetic system with each other. When the magnetic poles generated by the stator coil and the magnetic poles of the magnet are in opposite poles, i.e., the displacement angle Φ=0 between the two magnetic poles, the magnetic energy of the magnetic system is the lowest; when the magnetic poles rotate to the same poles, i.e., the displacement angle Φ=2π/n between the two magnetic poles, the magnetic energy of the magnetic system is the highest. After removing the external force, due to the mutual repulsion of the magnetic poles of the magnetic system, the magnetic force will restore the magnet to the state of lowest magnetic energy. Thus the magnet generates motion and drives the magnetic rotor to rotate.
Brushless DC water pumps are electronically commutated without the use of carbon brushes, the magnet rotor and stator silicon steel sheet have multi-stage magnetic field, when the magnet rotor rotates at an angle relative to the stator it will automatically change the direction of the magnetic poles, so that the rotor is always repulsed by the same level, which makes the brushless DC magnetic isolation pumps have a high rotational speed and efficiency.
The stator and rotor of the magnetic isolation pump are completely isolated, which completely avoids the liquid leakage problem that exists in the traditional motor-type brushless DC water pump. Moreover, it can be completely submersible and waterproof, which effectively improves the service life and performance of the pump. Brushless DC water pump (magnetic isolation pump) consists of pump body (isolation parts), motor stator, shaft, bearings and rotor water lobe (magnets and impellers) several parts:
Magnets (neodymium-iron-boron permanent magnets)
Permanent magnets made of rare-earth permanent magnets have a wide range of operating temperatures (-45-400 ° C), high coercive force, and the magnetic direction is very good. anisotropy, and no demagnetization occurs when the same poles are close to each other, making it a good source of magnetic field.
Isolation parts
When metal isolation sleeve is used, the isolation sleeve is in a sinusoidal alternating magnetic field, and eddy current is induced in the cross section perpendicular to the direction of the magnetic line of force and converted into heat. The expression of eddy current is as follows: where Pe- eddy current; K-constant; n-pump rated speed; T-magnetic drive torque; F-pressure inside the isolation sleeve; D-inside diameter of the isolation sleeve; a material's resistivity; - tensile strength of the material. When the pump is designed, n, T is the working condition is given, to reduce the eddy current can only be considered from the F, D and so on. Selection of high resistivity, high strength non-metallic materials to produce isolation sleeve, in reducing eddy current is very obvious.
Shaft
Since the brushless DC magnetic isolation pump works by energizing the coil to drive the rotor to rotate, rotate in order to maintain the smoothness of the rotor rotation and noise, the use of high-performance ceramic shafts and bushings with the high precision can be achieved, effectively reducing the rotational resistance and noise.
Sliding bearings
Magnetic pump sliding bearing materials are engineering plastics plastic (POM) or ceramic. Due to the plastic steel (POM) and ceramics have very good heat resistance, corrosion resistance, friction resistance, so the sliding bearing of the magnetic pump is mostly made of engineering ceramics. Due to the engineering ceramics is very brittle and expansion coefficient is small, so the bearing clearance must not be too small, in order to avoid the occurrence of holding the shaft accident.
Because the sliding bearing of the magnetic pump is lubricated by the conveyed medium, so it should be made of different materials according to different media and working conditions. 1. When the follower part of the magnetic actuator operates under overload condition, the follower part of the magnetic actuator will slip on the shaft, which effectively protects the motor.
2. When the pump is in operation, the annular gap area between the internal magnetic rotor and the isolation sleeve and the friction subassembly of the plain bearing must be flushed and cooled with a small amount of liquid. The flow rate of the coolant is usually 2%-3% of the pump design flow rate. 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 holes are not smooth or clogged, it will result in the medium temperature being higher than the working temperature of the permanent magnets, which will cause the inner magnetic rotor to gradually lose its magnetism and cause the magnetic actuator 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 hydrocarbon or oil, the temperature rise in the annular gap area can be maintained at 5-8℃. Magnetic pump is a kind of pump that realizes contactless torque transfer through magnetic drive thus replacing dynamic seal with static seal to make the pump completely leakage-free. Due to the pump shaft, the inner magnetic rotor is completely closed by the pump body, isolation sleeve, thus completely solved the problem of "running, risking, dripping, leakage", eliminated the refining chemical industry flammable, explosive, toxic, harmful media through the pump seal leakage of the security risks, and vigorously ensure the physical and mental health of workers and safe production.
Compared with the motor type DC brushless water pump, the magnetic pump has the following advantages:
1. The pump shaft is sealed by the dynamic seal into a closed static seal, completely avoiding the leakage of media. It can be used on both land and water, and is completely waterproof.
2. No need for independent lubrication and cooling water, reducing energy consumption.
3. Small power consumption, high efficiency, and damping vibration damping effect, reducing the impact of motor vibration on the pump and pump cavitation vibration on the motor.
4. When overloaded, the rotor will slip on the ceramic shaft, which has a protective effect on the motor and pump. Precautions for the use of brushless DC circulating pump (magnetic isolation pump) 1. Prevent particles from entering
(1) Do not allow ferromagnetic impurities, particles into the magnetic actuator and bearing friction vice;
(2) After conveying the medium that is easy to crystallize or precipitate, it is necessary to flush it in time (fill the pump cavity with water after stopping the pump, and discharge it cleanly after running it for 1min) in order to guarantee the service life of the sliding bearings;
(3) When conveying the medium containing solid particles, it should be filtered at the entrance of the pump flow pipe.
2. Prevent demagnetization
Should be operated under the specified temperature conditions, it is strictly prohibited to exceed the medium temperature. Magnetic pump isolation sleeve can be installed on the outer surface of the platinum resistance temperature sensor to detect the temperature rise in the ring gap area, so that the temperature exceeds the limit when the alarm or shutdown.
3. Prevent dry friction
Minimize idling time. (1) magnetic pump shaft breakage. CQB type magnetic pump pump shaft using the material is 99% alumina porcelain, the main reason for the pump shaft breakage is that, because the pump idling, bearing dry friction and the shaft twisted off. Disassemble the pump to check the bearing can be seen has been worn seriously to prevent the pump breaks the main way is to avoid the pump idling.
(2) magnetic pump bearing damage. CQB magnetic pump bearing material is high-density carbon, such as the pump water breakage or pump impurities, will cause bearing damage. Cylindrical coupling inside and outside the magnetic rotor coaxiality requirements between if not guaranteed, will also directly affect the bearing life.
(3) magnetic pump can not hit the liquid. Magnetic pump can not hit the liquid is the most likely failure of the pump, the reason is more. First of all, you should check the pump suction line whether there is a leakage place, check the suction pipe air is discharged, magnetic pump filling the amount of liquid is sufficient, suction pipe whether there is debris clogging, but also should check whether the pump is reversed (especially in the change of the motor or the power supply line after overhaul), you should also pay attention to the pump suction height is too high. Through the above check if still can not be solved, the pump can be disassembled to check to see if the pump shaft is broken, should also check the pump's dynamic ring, static ring is intact, the entire rotor can be a small amount of axial movement. If the axial movement is difficult, you can check whether the carbon bearing is too tightly combined with the pump shaft.
It is worth noting that the magnetic pump repaired a few times to find out the problem, should pay attention to the magnetic coupling is working properly. Bearings, the inner magnetic rotor and spacer in operation will produce heat, which will make the working temperature rise, on the one hand, the power transferred to decline, on the other hand, the delivery of easily vaporized liquids magnetic pump will produce great trouble. The power transferred by the magnet is a continuous decreasing curve with the increase of temperature. Usually, below the working limit temperature of the magnet, the decrease of its transferring ability is reversible, while above the limit temperature it is irreversible, i.e., after the magnet cools down, the lost transferring ability can never be recovered. Special circumstances in the magnetic coupling slip (out of step), the heat of the eddy current in the spacer will grow dramatically, the temperature rises sharply, if not handled in a timely manner, will cause the magnet steel demagnetization, so that the magnetic coupling failure. Therefore, the magnetic pump should be designed with a reliable cooling system. For the medium that is not easy to vaporize, the cooling circulation system is generally led by the impeller outlet or pump outlet of the liquid flow, through the bearings and the magnetic drive part of the suction population back to the suction population, for the medium that is easy to vaporize, the heat exchanger should be increased or the liquid flow should be led to the pump outside of the storage tank, to avoid the heat to return to the suction population, for the solid impurities or ferromagnetic impurities of the medium, filtration should be considered, and for high-temperature media, should be considered for cooling to ensure that the magnetic coupling does not exceed the operating Limit temperature.
When considering whether the rotational speed is enough, we should first check whether the rotational speed of the motor itself is normal, which can be measured by a tachometer, and in the case of normal rotational speed of the motor, we can consider whether there will be a slip of the magnetic coupling.
(4) Insufficient head. Causes of this failure are:air in the conveying medium, impeller damage, insufficient speed, the specific gravity of the conveyed liquid is too large, the flow rate is too large.
(5)Insufficient flow. The main reasons for insufficient flow are: impeller damage, speed is not enough, the head is too high, there are debris in the pipe clogging and so on. There are many types of magnetic pumps, in the design of the device equipment, to determine the use of the pump and performance parameters and select the pump type. Then what principles to buy DC pumps?
A, pump selection principles
1, so that the selected pump type and performance in line with the device flow, head, pressure, temperature and other process parameters, the most important thing is to determine the voltage, the highest head, and in the head of how high when the flow rate to achieve how much. For details, please refer to the head - flow curve.
2, must meet the requirements of the characteristics of the medium
To transport flammable, explosive toxic or precious media pumps, the requirements of a reliable shaft seal or the use of non-leakage pumps, such as magnetic drive pumps (no shaft seal, the use of isolation type magnetic indirect drive).
To transport corrosive media pumps, convection parts are required to use corrosion-resistant materials, such as fluorine plastic corrosion-resistant pumps.
The pump conveying solid particles of media, convective parts are required to use wear-resistant materials, if necessary, the shaft seal with the use of clean liquid flushing.
3, mechanical requirements for high reliability, low noise, low vibration.
4, the correct calculation of the input cost of the pump procurement, the pump manufacturer to visit, the requirements of its equipment quality, good after-sales service, spare parts can be supplied in a timely manner.
Second, how to correctly calculate the input cost of procurement pumps
First procurement, comparison of three, accurate calculation of the price of the pump, and then select the product that can achieve the price of their requirements. But for the user, the magnetic pump in the use of the process plays a role far higher than the original purchase it and spend the cost, so that the pump must have problems and failures when the waste of working time and maintenance costs are calculated to the overall cost of going; Similarly, the pump in the process of running will cost a lot of electricity, years and years down the road, a small pump consumes electricity is a smack in the face.
After a number of foreign pump factory sold products tracking survey shows that the pump in its service life of the largest funds spent is not the initial purchase cost, but also not the maintenance costs, but its consumption of electricity. Surprised to find that the value of the original pump consumption of electricity has far exceeded its own procurement costs and maintenance costs, and then take into account the efficiency of its own use, noise, artificial maintenance and other reasons, we still have what reason to buy those low-quality, low-priced "water goods" products?
In fact, the principle of a certain type of pump is the same, inside the structure, components are similar, the biggest difference is reflected in the selection of components, workmanship and quality. And other products are not the same, the pump parts cost difference is very significant, the gap is so large that the general public can not imagine. For example, a very small shaft seal, cheap a few cents can be bought, while the good products are tens or even hundreds of dollars, you can imagine how big the gap between the two products manufactured using these two products, and let a person worry about is that in the early use of the process they are almost no difference. Hundreds and thousands of times the price difference is reflected in the performance and duration of use of the product. Short life (a few months), noise (appeared after one or two months), leakage (appeared after two or three months) and other phenomena occur one after another, so that many users regret the beginning should not save the difference in the middle. And the use of the process of big noise and high heat is actually valuable electrical energy is converted to useless kinetic energy (mechanical friction) and thermal energy, the actual effective work done (pumping) but much less.