Generally, the causes of imbalance of the impeller of the negative pressure fan in use can be divided into two types: the wear of the impeller and the scaling of the impeller. These two situations are related to the dust removal device connected in front of the induced draft fan. The cause of the imbalance of the impeller caused by the dry method is mainly wear, and the cause of the imbalance of the impeller caused by the wet method is mainly scaling. Ningbo air cooler, Ningbo air cooler

As long as this happens, blade-like wear is formed at the blade exit. For the impeller wear caused by dry dust removal, in addition to improving the dust removal effect of the dust collector, the most effective method is to improve the wear resistance of the impeller. As a result, the operating costs of the negative pressure fan and the entire production system are reduced, and the overall benefit is very good. Analysis and solution of imbalance of impeller of negative pressure fan

协 The association force between these oxide scales and the surface of the impeller is not even. Some oxide scales will fall off automatically under the action of vibration or centrifugal force, which is also a cause of the imbalance of the impeller. A more practical solution is the thermal spraying technique, which uses special methods to change materials such as wear-resistant and high-temperature-resistant metals or ceramics into high-temperature and high-speed particle flow, and sprays it onto the surface of the blade of the impeller to form a layer of material than the impeller itself. Super-strong outerwear with abrasion resistance, high temperature resistance, and oxidation resistance.

湿度 The humidity of the flue gas purified by the wet dust removal device is very high. Although the dust particles that have not been removed are small, the viscosity is very large. When the departmental ash falls off under the combined effect of centrifugal force and vibration, the balance of the impeller is destroyed, and the entire induced draft fan will vibrate. Although this will increase the cost of manufacturing or maintaining the impeller, it will increase the service life of the impeller by 2 times and extend the overhaul period of the induced draft fan. Impellers that are not treated by thermal spraying during use can be considered for thermal spraying of the impellers during equipment maintenance.

Dry type dust removal device can remove most of the large particles of dust in the flue gas, but a small number of large particles and many small dust particles along with high temperature and high speed smoke through the induced draft fan, subject the blades to continuous washing. When selecting the induced draft fan, the dry dust removal should preferably use the impeller treated by thermal spraying. Because this wear is irregular, it causes the imbalance of the impeller. This can not only reduce the damage caused by the impeller's dynamic balance, but also reduce the imbalance caused by the oxide layer. When they pass through the induced draft fan, they will be adsorbed on the non-working surface of the blade under the action of the gas, especially at the entrance and the exit of the non-working surface, which will form severe dust fouling and gradually thicken.

As for the negative pressure fan, the analysis and explanation we want to perform on this product is its price. Because it is an important reference for our selection work, and the appropriate price is selected and the good product quality is guaranteed, then the user has a good price-performance ratio.

    In terms of negative pressure fan prices, the relevant factors are mainly the use of materials, motors, and fan specifications. Therefore, if you want to consider whether the price is appropriate, these factors must be involved and considered. Any of them, so as not to make the selection of negative pressure fan wrong.

    For the selection of the type of negative pressure fan, because it is closely related to the price of negative pressure fan, this work must be paid attention to. So, let ’s take a closer look at its specific aspects.

    Aspect 1: Outer frame material

    The material of the outer frame of the wind pressure fan is generally three types: galvanized sheet, plastic steel and FRP fiberglass. FRP fiberglass is also called glass fiber reinforced plastic.

    Galvanized sheet: its popular name is tinplate. It is used more because it is cheaper. However, there is a major disadvantage in that it has a short service life.

    Plastic steel: Although this material can be used, it is still not common from the current market situation.

    FRP glass fiber: It is a reinforced plastic, which has some advantages of its own, the main one is to have good corrosion resistance and high temperature resistance, and light weight. Therefore, its service life is longer than the above two.

    Aspect 2: Fengye

    For it, it is generally based on the material used. As for the blades of negative pressure fans, the material types are stainless steel, aluminum alloy, aluminum-magnesium alloy, and nylon plus iron. Among them, stainless steel and aluminum alloy are the two more commonly used. The main advantages of aluminum-magnesium alloys are high temperature resistance and high strength. Nylon plus iron is mainly used in some acid and alkali occasions. The price and cost of these materials are different, so the difference in the price of negative pressure fans is caused.

Negative pressure fans are loved by machinery, electronics and other manufacturers for their excellent cooling system! Generally speaking, a regular large-scale processing workshop requires several negative pressure fans to achieve the cooling effect. Compared with the ordinary high-volume traditional cooling system, it can reduce a lot of unnecessary expenses for the company's financial aspect! How much stronger is it than a traditional cooling system? It has always been a topic we are very concerned about, and today is to answer your questions!

    First, traditional cooling equipment basically uses chemical methods to cool down, which is relatively harmful to the human body and is very unfriendly to the environment. The negative pressure fan uses the principle of physical cooling, which has no harm to the human body and the natural environment.

    Second, the traditional cooling equipment is usually slower, and the negative pressure fan has a very fast cooling effect, and the cooling effect can usually be completed in a short time.

    Third, the traditional cooling equipment usually only has a cooling effect, and the negative pressure fan can effectively control the air in the plant when the temperature is lowered, so that the plant maintains relatively fresh air, which effectively improves the mental state of the workers, thereby Can greatly improve work efficiency.

    Fourth, the area under which the negative pressure fan cools is relatively wide. Generally, a 2000 square meter site requires only a few negative pressure fans to complete the cooling effect. This is not comparable to traditional cooling equipment.

    Fifth, the power consumption of traditional cooling equipment is relatively strong, and the power consumption of negative pressure fans is only modest, which is very power saving. And can work long hours.

1. High-quality stainless steel stamping blades are used for stable operation, power saving and durability, and use in various factories, Internet cafes, shopping malls, flowers and other ventilation places.

  2. The automatic opening and closing of the blinds can achieve the effects of dustproof, waterproof and beautiful. It can be blown or evacuated and is a cooling and ventilation option for greenhouses and factories.

  3. Special installation occasions, can be used as dual network or dual network + shutter fan. The dual-network fan is mainly aimed at the excessively large indoor space, which strengthens the convection of air and makes the relay fan. Dual-net and louvered fans are suitable for installation in low-floor factories and elsewhere, and the blades are not easily accessible by hand.

  After installation, it can effectively improve the high temperature and sultry environment of the factory. It can make the temperature of the workshop (high temperature of 32-45 degrees Celsius) quickly decrease within 10 minutes, keeping the temperature at 26 ~ 30 degrees. This is a comfortable working environment for the human body, which can improve employee productivity and maintain product quality. Its cooling, ventilation and ventilation effects can effectively solve the problems of high temperature and air pollution in 95 ~ 99% of workshops.