Centrifugal fan is to rely on the input of mechanical energy, increase gas pressure and send gas machine, it is a kind of driven fluid machinery. Centrifugal fans are widely used in ventilation, exhaust and cooling of factories, mines, tunnels, cooling towers, vehicles, ships and buildings; ventilation and draft in boilers and industrial furnaces; cooling in air conditioning and domestic appliances and Ventilation; grain drying and selection; wind tunnel source and hovercraft inflatable and propulsion.
Centrifugal fan works with turbine compressor basically the same, are due to the gas flow rate is low, little pressure change, generally do not need to consider the gas volume change, that is, the gas as incompressible fluid treatment.
Centrifugal fan can be made of right-handed and left-handed two types. Faced from the motor side: impeller clockwise rotation, known as the right rotary fan; impeller counterclockwise rotation, known as the left rotary fan.
Centrifugal fan from the chassis, spindle, impeller, bearing and motor drive and other components.
Chassis: made of steel sturdy and reliable, can be sub-integral and semi-open, semi-open for easy maintenance.
Impeller: the blade, curved front plate and plate rear plate composition.
Rotor: Static and dynamic balance should be done to ensure smooth rotation, good performance.
Transmission parts: a spindle, bearing boxes, rolling bearings and pulleys (or coupling) composition
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For hardware manufacturers, there is often such an erroneous idea: Hardware door locks are an industry with a low technical threshold. If they copy large brands of products, they can succeed and they can also succeed. Therefore, when developing products, it is necessary to pay close attention to some companies with good brand reputation and to imitate them. This will cause the homogeneity of the entire market to be very serious. Large enterprises and small businesses will enter the cycle at the same time. However, with the development of the economy, This phenomenon is gradually changing. More and more small businesses are beginning to realize that imitation is becoming more and more difficult.
The concept of consumers: recognize the brand, re-quality old generation of consumers pay attention to the price when buying hardware locks, that the quality is the same, the price is the concept, but with 80 after becoming the main force of decoration, brand awareness is gradually Strengthened, and realized that the door locks also have great scientific and technological content and aesthetic standards. Therefore, when choosing a large brand, such as the strength of the metal door lock brand Bang send hardware, in terms of quality and design, have a unique taste, not only looks elegant and beautiful, but also easy to use and comfortable and have a sense of security. While some of the cottage products on the market may look similar on the outside, they are not favored by the new generation of consumers due to the fact that the content of science and technology cannot reach the fine details.
The traditional grocery store hardware franchise is declining, the image store has become the mainstream traditional hardware store image has always been known as dirty, product piled up, old age, but in terms of quality can not be guaranteed, after-sales service is also very poor . Nowadays it is replaced with a modern supermarket-type brand store where products are arranged in neat rows, clearly priced, and there are models that can be compared. The core technology is displayed on the quality, so that consumers can buy the rest assured. According to franchisees from Bangalore, the majority of young people who came to the stores to purchase metal door locks are young people. They value the appearance, quality, and understanding of the technology of hardware locks. They are also very knowledgeable about the latest technologies. So the business is good.
Large-brand product technology content is getting higher and higher, small companies can not imitate aerospace materials, hundreds of procedures, unique anti-theft design, etc., these more and more in-depth core of the technology of hardware locks to make the previous copycat companies more and more difficult to imitate There is only one appearance that simply does not allow the customer to generate trust. Therefore, he enters a dead end where he does not like anything. He himself has no technological innovation, no precipitation on the process, and he cannot imitate the high end. Therefore, he is caught in the embarrassment of development.
For the future of hardware door locks, people in the industry believe that in the next five years, some powerful brands such as Bang Paolo will top up gradually, and a large number of small enterprises will be eliminated. The hardware market will be further standardized. This is a good thing for the entire industry.
This is about Centrifugal Fan
Features
Centrifugal blowers are widely used in sewage treatment, smelting blast furnace, coal preparation plant, mine flotation, chemical gas, vacuum and other fields, can also be used to transport other special gases.
1. Compact structure: beautiful appearance, good stability, easy installation and maintenance.
2. Smooth operation: Optimized design of the impeller to reduce the axial force to a minimum, and efficient impeller, and static and dynamic balance correction, the machine running smoothly, without any damping device in the case of bearings Amplitude ≤0.04mm.
3. Low noise: blower operation, without any mechanical friction, the use of a reasonable blade-shaped line to the sound to a minimum. Centrifugal blower noise is high-frequency noise, as long as there are obstacles, can be noise, so the fan room almost no noise.
4. Oil-free machinery: Blower bearings with grease lubrication, bearing life of more than three years. Fan does not generate oil and gas during operation. Special requirements fans, with molybdenum disulfide lithium grease lubrication bearings.
5. Impeller: Impeller with a special compound linear, reducing internal leakage and improve the volumetric efficiency.
6 easy to adjust: the inlet valve to regulate flow, the outlet valve to regulate the pressure.
7. Drive: usually using a two-pole asynchronous motor, you can also use four-pole motor drive. Depending on the user grid, different voltage motors can be used.
8. Sealing: In addition to each level of import impeller impeller, the interstage and the housing at both ends with a labyrinth seal to prevent gas leaks.
9. Cooling: exhaust bearing housing has two structures, air-cooled and water-cooled, as the impeller on the level of gas compression, resulting in the exhaust casing temperature is much higher than the intake casing. In the exhaust bearing air-cooled or water-cooled device to extend the bearing life.
10. Bearing temperature control alarm: fan accessories with temperature control box, connected to the bearing through the PT100 resistance, when the bearing temperature exceeds the set temperature, the temperature control box will automatically alarm.
11. Transmission: a coupling drive, belt drive, gearbox drive three. According to different equipment and technology, choose a different transmission