| Customization: | Available |
|---|---|
| Material: | Stainless Steel |
| Usage: | for Air Conditioner, for Manufacture, for Refrigerate |
|
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Centrifugal fan manufacturers centrifugal fans for sale
11-62A low-noise multi-blade centrifugal fan is designed and manufactured to meet the needs of the increasingly developing purification industry and environmental protection and noise reduction. The fan adopts the multi-objective optimization design method of various aerodynamic parameters such as noise and efficiency in the design, and realizes the best performance matching of the whole machine. It has good aerodynamic performance, and the impeller is corrected by strict dynamic balance, so it has the characteristics of stable operation, low noise, large flow, small vibration and long life.
Overall & Installation dimensions
| Model | Appearance and installation dimension | Air inlet size | Air outlet size | Anchor bolt size | |||||||||||||||||||
| G | M | L | F | K | N | E | H | D1 | D2 | D3 | n-φd | A1 | A2 | A3 | B1 | B2 | n1-d1 | a | b | c | d | n2-d2 | |
| 2.8A | 590 | 553 | 544 | 218 | 165 | 333 | 150 | 370 | 280 | 305 | 325 | 8-φ10 | 273 | 76x4=304 | 336 | 244 | 92x3=276 | 14-φ10 | 470 | 370 | 285 | 320 | 4-φ12 |
| 3.2A | 660 | 621 | 629 | 240 | 184 | 372 | 162 | 420 | 320 | 350 | 369 | 8-φ10 | 212 | 86x4=344 | 376 | 260 | 99x3=297 | 14-φ10 | 440 | 340 | 310 | 350 | 4-φ12 |
| 3.5A | 738 | 710 | 675 | 288 | 202 | 380 | 175 | 450 | 360 | 385 | 410 | 8-φ10 | 359 | 100x4=400 | 439 | 264 | 101x3=303 | 14-φ10 | 515 | 415 | 360 | 400 | 4-φ12 |
| 4A | 810 | 787 | 728 | 310 | 210 | 471 | 212 | 500 | 400 | 431 | 461 | 12-φ12 | 393 | 87x5=435 | 477 | 324 | 91x4=364 | 18-φ12 | 560 | 460 | 375 | 415 | 4-φ12 |
| 4.5A | 907 | 912 | 850 | 357 | 295 | 540 | 200 | 550 | 450 | 490 | 520 | 12-φ12 | 413 | 91x5=455 | 496 | 324 | 91x4=364 | 18-φ12 | 620 | 520 | 375 | 415 | 4-φ15 |
| 5A | 955 | 930 | 850 | 360 | 280 | 567 | 228 | 595 | 500 | 540 | 570 | 12-φ12 | 490 | 106x5=530 | 574 | 350 | 98x4=392 | 18-φ12 | 650 | 550 | 395 | 440 | 4-φ15 |
Technical data
|
Size
|
Speed
|
Matching motor |
Volume Flow
|
Total pressure
|
Noise Db
|
|
(No.)
|
(r/min)
|
(Kw-P) |
(m3/h)
|
(Pa)
|
(A)
|
| 2 | 1450 | 0.37-4 | 1500-2000 | 380-300 | ≤56 |
| 2.25 | 1450 | 0.55-4 | 1136-2848 | 481-380 | ≤56 |
| 2.5 | 1450 | 0.75-4 | 1300-3300 | 450-350 | ≤65 |
| 2.8 | 1450 | 1.1-4 | 2200-5600 | 570-440 | ≤69 |
| 960 | 0.55-6 | 1430-3600 | 240-230 | ≤60 | |
| 3 | 1450 | 2.2-4 | 3000-5000 | 600-450 | ≤71 |
| 960 | 0.75-6 | 1800-4850 | 270-230 | ≤61 | |
| 3.2 | 1450 | 2.2-4 | 3400-8900 | 760-570 | ≤73 |
| 960 | 1.1-6 | 2180-5700 | 310-230 | ≤63 | |
| 3.5 | 1450 | 4-4 | 4500-9900 | 910-700 | ≤76 |
| 960 | 1.5-6 | 2900-6400 | 380-290 | ≤68 | |
| 4 | 960 | 2.2-6 | 4445-10500 | 522-395 | ≤73 |
| 3.0-6 | 4600-11800 | 550-440 | ≤75 | ||
| 4.5 | 960 | 4.0-6 | 6600-14880 | 555-440 | ≤76 |
| 5 | 960 | 4.0-6 | 8680-17880 | 815-616 | ≤77 |
| 5.5-6 | 9800-19300 | 920-640 | ≤79 | ||
| 6 | 720 | 7.5-6 | 13425-21473 | 1170-887 | ≤81 |
| 3-8 | 10068-16104 | 658-493 | ≤78 |
You deserve your own design, and we can help you to achieve it. Below is the bulk we do for our customer, and hope you also can be our customer.
The centrifugal fan is based on the principle of converting kinetic energy into potential energy, using a high-speed rotating impeller to accelerate the gas, then decelerate and change the flow direction, so that the kinetic energy is converted into potential energy (pressure). In a single-stage centrifugal fan, the gas enters the impeller from the axial direction, the gas changes to the radial direction as it flows through the impeller, and then enters the diffuser. In the diffuser, the gas changes the direction of flow and the increase in the cross-sectional area of the duct slows down the gas flow, which converts kinetic energy into pressure energy. The pressure increase occurs mainly in the impeller, and secondly in the diffusion process. In a multi-stage centrifugal fan, a recirculator is used to move the airflow to the next impeller, creating a higher pressure.
Effect
Zhejiang Jiayi Fan Co., Ltd. was established in 2003. It is a modern private enterprise focusing on the research, development, production and sales of ventilation equipment. The company is headquartered in Daxi Town, Wenling City, Zhejiang Province, which is the "Hometown of Pumps in China", and has branches across the country; the production base is located in the East New District of Wenling City.
Principles of operation
The centrifugal fan uses the centrifugal power supplied from the rotation of impellers to increase the kinetic energy of air/gases. When the impellers rotate, the gas particles near the impellers are thrown off from the impellers, then move into the fan casing. As a result, the kinetic energy of gas is measured as pressure because of the system resistance offered by the casing and duct. The gas is then guided to the exit via outlet ducts. After the gas is thrown-off, the gas pressure in the middle region of the impellers decreases. The gas from the impeller eye rushes in to normalize this. This cycle repeats and therefore the gas can be continuously transferred.
The main parts of a centrifugal fan are:
1) Fan housing
2) Impellers
3) Inlet and outlet ducts
4) Drive shaft
5) Drive mechanism
6) Fan Dampers and Vanes
7) Inlet and outlet ducts
8) Fan blades
9) Fan discharge casing
10) Other components used may include bearings, couplings, impeller locking device, fan discharge casing, shaft seal plates etc.
Drive mechanisms
The fan drive determines the speed of the fan wheel (impeller) and the extent to which this speed can be varied. There are two basic types of fan drives.
Direct
The fan wheel can be linked directly to the shaft of an electric motor. This means that the fan wheel speed is identical to the motor's rotational speed. Direct drive is the most efficient form of fan drive since there are no losses converting from the motors rotational speed to the fan's. Some electronics manufacturers have made centrifugal fans with external rotor motors (the stator is inside the rotor), and the rotor is directly mounted on the fan wheel (impeller).
Belt
A set of sheaves is mounted on the motor shaft and the fan wheel shaft, and a belt transmits the mechanical energy from the motor to the fan. The fan wheel speed depends upon the ratio of the diameter of the motor sheave to the diameter of the fan wheel sheave. Fan wheel speeds in belt-driven fans are fixed unless the belt(s) slip. Belt slippage can reduce the fan wheel speed by several hundred revolutions per minute (RPM). Belts also introduce an additional maintenance item
Bearings
Bearings are an important part of a fan. Sleeve-ring bearings are used for smaller fans such as computer fans, while larger residential and commercial applications use ball bearings. Industrial applications may used specialized bearings such as water-cooled sleeve bearings for exhausting hot gasses. Many turbo blowers use either an air bearing or a magnetic bearing.
Speed control
Fan speed for modern fans is done through Variable Frequency Drives that directly control the motors speed, ramping up and down the speed of the motor to different airflows. The amount of air moved is non-linear with the motor speed, and must be individually balanced for each fan installation. Typically this is done at time of install by testing and balancing contractors, although some modern systems directly monitor airflow with instruments near the outlet, and can use the feedback to vary the motor speed.
Older fan installations would use inlet or outlet vanes - metal flaps that could be adjusted open and closed on the outlet of the fan. As the vanes closed they would raise the pressure and lower the airflow from the fan. This is less efficient than a VFD, as the VFD directly reduces electricity used by the fan motor, while vanes worked with a constant motor speed.
Fan blades
The fan wheel consists of a hub with a number of fan blades attached. The fan blades on the hub can be arranged in three different ways: forward-curved, backward-curved or radial.
Forward-curved
Forward-curved blades in a household fan Forward-curved blades, curve in the direction of the fan wheel's rotation. These are especially sensitive to particulates and commonly are only specified for clean-air applications such as air conditioning. Forward-curved fans are typically used in applications where the static pressure is too high for a vane axial fan or the smaller size of a centrifugal fan is required, but the noise characteristics of a backwards curved fan are disruptive for the space. They are capable of providing lower air flow with a higher increase in static pressure compared to a vane axial fan.They are typically used in fan coil units. They are less efficient than backwards curved fans.
Backward-curved
Backward-curved blades, as in Figure 3(b), curve against the direction of the fan wheel's rotation. Smaller blowers may have backward-inclined blades, which are straight, not curved. Larger backward-inclined/-curved blowers have blades whose backward curvatures mimic that of an airfoil cross section, but both designs provide good operating efficiency with relatively economical construction techniques. These types of blowers are designed to handle gas streams with low to moderate particulate loadings[citation needed]. They can be easily fitted with wear protection but certain blade curvatures can be prone to solids build-up.[citation needed]. Backward curved wheels are often heavier than corresponding forward-curved equivalents, as they run at higher speeds and require stronger construction.
Backward curved fans can have a high range of specific speeds but are most often used for medium specific speed applications-high pressure, medium flow applications such as in air handling units.[citation needed]
Backward-curved fans are more energy efficient than radial blade and forward curved fans and so, for high power applications may be a suitable alternative to the lower cost radial bladed fan.
Straight radial
Radial blowers, as in Figure 3(c), have wheels whose blades extend straight out from the centre of the hub. Radial bladed wheels are often used on particulate-laden gas streams because they are the least sensitive to solid build-up on the blades, but they are often characterized by greater noise output. High speeds, low volumes, and high pressures are common with radial blowers[citation needed], and are often used in vacuum cleaners, pneumatic material conveying systems, and similar processes.
| Q1: What's the terms of trade? |
| A1: FOB,CFR,CIF or EXW are all acceptable. |
| Q2: What's the terms of payment? |
| A2: T/T,L/C at sight or cash. |
| Q3: How long is your delivery time? |
| A3: Generally it is 5-10 days if the goods are in stock or it is 20-30 days if the goods are not in stock, it is according to quantity. |
| Q4: What is the advantage about your company? |
| A4: Our company has professional team and professional production line. |
| Q5: If we travel to China to checking your facility, are you welcome? |
| A5: Of course, We will provide the whole accompany upon your arrivial. Warm Welcome! |
| Q6: How Many Years of your company working in this industry? |
| A6: We have over 20-year experience in this field. |
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