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2022-04-18

Advantages and Application of Oil Bearing for DC Fan

The pivot joint is fixed at the base of the stator of the motor to maintain a proper clearance between the rotor and the stator. Of course, there must be a gap between the shaft core and the bearing, so as not to lock the shaft core and fail to work; the stator structure of the motor is somewhat (hereinafter referred to as the stator). After the power is input, the induced magnetic wire will occur between the rotor and the stator, and the control of the drive circuit will make the electric fan motor work. Therefore, in the conventional fan motor structure, as long as the fan rotor, the motor stator and the drive circuit work through the pivot and magnetic field induction between the shaft core and the bearing.

Advantages and Application of Oil Bearing for DC Fan

2022-04-18

Cooling fan manufacturers introduce you to the advantages of DC DC fans

The DC DC fan is actually a fan called a DC fan. It drives the rotation of the fan impeller by inputting DC energy, so as to realize the conversion process from DC energy to mechanical energy. The biggest feature of DC DC fan is the choice of DC motor.

Cooling fan manufacturers introduce you to the advantages of DC DC fans

2022-04-11

Discussion on the difference between axial flow fan and DC DC cooling fan

DC fans belong to the cooling fan industry, and cooling fans are divided into DC fans and DC fans. AC fan referred to as ACFAN, DC fan referred to as DCFAN, belonging to the fan industry the most common existence. Therefore, the DC fan means a direct current fan. Its purpose is to cool heated electronic equipment, and its application range is very wide. This cooling fan will be used in refrigerators, refrigerators, air conditioners and other household appliances used in our daily lives. The bearings of DC fans are roughly divided into two types, one is the form of balls, collectively referred to as ball bearings. The other is oil bearing, collectively referred to as oil bearing. The difference between them is that the ball bearings have a long service life and low noise, but the price is relatively high. The service life of oil-containing bearings is 1/3 shorter than that of ball bearings. After using for a period of time, some noise may be generated, but the price is cheap. 2. Appearance selection: From the appearance point of view, the whole should be relatively thick, and the color should be relatively pure, especially black, which is not important for color fans. There is no fleece edge on the frame blade edge. Look at the thickness of the fan blades, there will not be too much deformation when you pinch the outer frame by hand. 3. Listen to noise: Some high-speed may have electromagnetic sound. If there are other sounds, it means that the quality is not very good. If the speed of the DC fan is not very high, for example, the speed of the 7cm fan does not exceed 3500RPM, but the sound of the wind greatly indicates that the quality of the fan is too poor. 4. Look at the two parameters on the outer package. According to the direction of the air flow in and out of the cooling fan, it can be divided into axial flow fan, centrifugal fan, mixed flow fan, cross flow fan, blower, and then from its different power supply forms can also be divided into DC cooling fan and AC cooling fan, so today we will Focus on the differences and differences between axial flow fans and DC cooling fans. First, when the axial fan is operated, the blades drive the air flow in the axial direction. Axial fans are usually installed on the cabinet of electrical equipment and sometimes integrated on the motor. Due to the compact structure of the axial flow fan, it can save a lot of space, easy to install and widely used. The DC cooling fan is a rotating machine that converts electrical energy into mechanical energy. The principle of operation is that according to the rules of Ampere's right hand, a conductor passes a current to generate a magnetic field around it. If the conductor is placed in another fixed magnetic field, an attractive or repulsive force will be generated, causing the object to move. In the blade of the DC fan, a rubber magnet filled with magnetism in advance is attached. Around the silicon steel plate, the shaft is partially wrapped with two sets of coils, and the Hall induction component is used as a synchronous detection device to control a set of circuits, so that the two sets of coils wound around the shaft work in turn. The silicon steel plate produces different magnetic poles, and this magnetic pole and the rubber magnet produce suction. When the suction force is greater than the static friction of the fan, the fan blades rotate naturally. Because the Hall sensing component provides a synchronization signal, the fan blades can continue to operate. The DC cooling fan can only operate with DC power. The voltage used must be the same as the rated voltage of the DC cooling fan. The axial flow fan also includes an AC alternating current cooling fan and a DC direct current cooling fan. They are all closely related.

Discussion on the difference between axial flow fan and DC DC cooling fan

2022-04-11

Examples of common cooling fan types and characteristics

As long as it comes to cooling fans, people know that there are many types, different types have many models, and different models have different parameters. Choosing a truly suitable product fan requires sufficient understanding. Do you know what types of common cooling fans, and do you know its Features? Common cooling fan types are as follows: Axial Fan The blades of an axial fan promote air flow in the same direction as the shaft. The impeller and propeller of an axial flow fan are somewhat similar. In operation, most of the airflow is parallel to the axis, in other words, flows in the direction of the axis. When the inlet air flow of the axial flow fan is 0 static pressure free air, its power consumption is the lowest, and it increases with the increase of the back pressure of the air flow during operation. Axial fans are usually installed on the cabinet of electrical equipment and sometimes integrated on the motor. Due to the compact structure of the axial flow fan, it can save a lot of space, easy to install and widely used. Axial fan features: high flow, medium pressure centrifugal fan When the centrifugal fan is working, the blades push the air to flow perpendicular to the axis (ie radial), the air intake is along the axis, and the air outlet is perpendicular to the axis. In most cases, the cooling effect can be achieved by using an axial fan, but sometimes if a 90-degree airflow rotation or greater wind pressure is required, a centrifugal fan must be selected. Strictly speaking, the fan is also a centrifugal fan. Centrifugal fan features: limited flow. High pressure mixed flow fans are also known as diagonal flow fans. At first glance, a mixed-flow fan is no different from an axial-flow fan. In fact, the air inlet of the mixed flow fan is along the axis, but the air outlet is along the diagonal direction of the axis and the vertical axis. Since the blades and the shroud are called conical, the wind pressure of this fan is high. Under the same size and other comparable performance, the noise of the centrifugal fan is lower than that of the axial fan. Mixed-flow fan features: high flow and relatively high wind pressure cross-flow fans can generate large-area wind flow, which is usually used to cool large surfaces of equipment. The inlet and outlet of the fan are perpendicular to the axis. The cross-flow fan uses a longer barrel-shaped fan impeller to work. The barrel-shaped fan blades are relatively large in diameter. Due to the larger diameter, a relatively low speed can be used on the basis of ensuring the overall air circulation, thereby reducing the noise caused by high-speed operation. Cross-flow fans can produce large areas of large area wind flow, usually used to cool large surfaces of equipment. The inlet and outlet of the fan are perpendicular to the axis. The cross-flow fan uses a longer barrel-shaped fan impeller to work. The barrel-shaped fan blades are relatively large in diameter. Due to the larger diameter, a relatively low speed can be used on the basis of ensuring the overall air circulation, thereby reducing the noise caused by high-speed operation. Mixed flow fan features: low flow, low wind pressure. There are different types of axial fans, centrifugal fans and mixed flow fans in China. Among them, Jiangshan technology DC fan belongs to axial fan. In this type, you can choose different types of fans. Our cooling fans are widely used in communication equipment, LED stage lighting, medical equipment, aerospace and other industries.

Examples of common cooling fan types and characteristics

2022-04-06

From leading to mainstream, brushless fan

Car engine heat dissipation for many years has been using a brush fan, through the brush motor to drive the fan blades to rotate quickly to the radiator. Brushless fans were originally just Bosch. Large international companies such as Brose can provide leading technology. However, in recent years, brushless fans have become popular in China and have become a very popular and recognized technical product. The core of the brushless fan is the brushless motor. Compared with the traditional brush motor, the brushless motor has the advantages of small size, high efficiency and long service life. 1 small volume Optimize design and copper wire selection, improve slot full rate, strengthen heat dissipation, improve motor efficiency and reduce motor volume. A brush motor with a 200W fan is compared with a brushless motor. When the outer diameter remains unchanged, the height of the motor is reduced from 88.2mm to 68.5mm, which is more friendly to the space layout of the whole vehicle. The thinnest 400W brushless motor currently developed can reach 63mm. 2 High efficiency The motor is the largest part of the power consumption of the entire electromechanical system, so it is more important to improve its work efficiency. For a single motor, the efficiency of the brush is about 65%, while the efficiency of our 400W brushless motor can reach 85%, and the efficiency of the motor is 20% higher than that of the motor. 3 Long life The brushless fan motor saves friction between the carbon brush and the commutator. The motor only wears the bearing, and the service life is greatly improved. Under comprehensive working conditions, the service life of the motor can reach 30000 hours, which is about 3 times the service life of the brush motor. Note: Non-Hall sensor measurement, but use back EMF method to detect side position. Advantages of brushless fans. The motor starts smoothly, the starting current increases gradually, and there is no phenomenon such as combustion insurance caused by large current impact, reducing the power supply voltage, etc. Stepless speed regulation, wide speed range (currently the fan is controlled at 600~3000RPM), strong overload capacity; but the brush motor needs resistance speed regulation, which is less efficient. Using brush + PWM speed control module mode, the total cost advantage is not as good as brushless. The motor itself has no excitation loss and brush loss, high efficiency, good comprehensive power saving effect, power saving up to 15%, and comprehensive working life of 30000 hours. PWM communication, with stall, overcurrent, overvoltage, undervoltage and other protection functions and fault feedback, can also use LIN communication to meet the various needs of customers. Lightweight design, selection of more efficient and lightweight raw materials, simplify the design structure. For example, the brushless fan adopts a spherical design with a large concave-convex structure. The lightest 400W fan assembly weighs only 3KG. No carbon brush, no spark, motor and controller integrated structure, better EMC performance, conduction disturbance, radiation disturbance up to level 3. From the patch to the stator, the rotor is self-made and has complete process capability. From product structure design, electromagnetic design, structure and performance simulation, vibration analysis, strength analysis, product verification, testing, EMC testing, noise testing, air volume testing, etc.; It can realize the LIN burning of the brushless fan, and can be quickly customized and developed according to customer requirements to provide customers with a complete solution.

From leading to mainstream, brushless fan

2022-04-06

Quality Requirements for Cooling Fan Bearings

Cooling fans usually refer to cooling fans, DC fans, AC fans, supercharged cooling fans, blowers and other categories, which use air flow to take away the heat generated by household appliances to ensure the normal operation of the equipment. The cooling fan bearing is the core transmission component of the cooling fan, which supports and fixes the rotor of the fan motor to enable the fan to rotate at high speed. Therefore, the quality of the cooling fan bearing largely determines the quality and life of the cooling fan. Therefore, the micro-bearing of the cooling fan must generally have the following properties and characteristics. Popular models of cooling fan bearings are: MR52Z2 * 5*2.5. 682Z2*5*2.3. MR83Z3 * 8*3. 693Z3*8*4. 684Z4*9*4. Normally through the cooling fan bearing must have the following characteristics. 1: High-precision, stable, and high-precision cooling fan bearing dimensional tolerances can make the cooling fan bearing and various components perfectly match. 2: High speed and flexible rotation. The cooling fan needs a high-speed cooling fan bearing, so the bearing as the transmission component must be a high-speed bearing. 3: Low noise, usually used for computers and other indoor small household appliances, so the cooling fan noise is required to be small enough, the size of the noise depends entirely on the noise of the cooling fan as the core of the transmission component, so the bearing noise of the cooling fan is small enough. 4: Low friction, complete processing technology and proper lubrication make the heat dissipation fan bearing reduce friction and resistance as much as possible during operation, so that the heat dissipation fan bearing runs worry-free. 5. Long service life. Most cooling fans run for a long time, so the service life of the cooling fan bearing is long enough, about 40000 hours, to ensure the service life of the cooling fan. 6: environmental protection. The company insists on customer first, high-tech as the leading, quality as the foundation, integrity to win customer trust, to provide customers with high-quality, high-reliability cooling fans and system cooling solutions, excellence, excellence is the spirit of enterprise; promote the development of the industry, and employees Common progress is the corporate mission, all colleagues will make unremitting efforts and collective struggle! Create brilliant! Meet the beautiful tomorrow!

Quality Requirements for Cooling Fan Bearings

2022-03-28

Blower classification introduction

Blower It is a general-purpose machinery for conveying gas. From an energy point of view, it is a machine that converts the mechanical energy of the prime mover into gas energy, and is mainly used for gas transportation as a gas power source. From the analysis of the field of use, it can also be used for gas combustion, metal oxidation, desulfurization oxidation, fermentation, sewage treatment, etc. Blower classification: volume type: Roots blower, screw fan. Multi-stage centrifugal fan (low speed) single-stage centrifugal (high speed)

Blower classification introduction

2022-03-28

The operation principle, function and characteristics of automobile cooling fan

First, it is necessary to explain the operation principle of the cooling fan. Many people think that the cooling fan is used to cool the water tank before cooling, otherwise, the fan will not be designed behind or in the middle of the water tank; however, this understanding is absolutely wrong because it involves a common sense problem. The car needs to overcome the wind resistance during the driving process, and the air has no dead angle under the action of gravity; then, the car needs to push the air away during the driving process, which will lose the power on the wheels-which can be defined as driving resistance.

The operation principle, function and characteristics of automobile cooling fan
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