Precision of processing and manufacturing, material selection, accessories (such as bearings, belts, motors, etc. ) and inspection standards will also affect the service life of fans.
3 working conditions and environment. High and low temperature, acid corrosion concentration, humidity, etc.
Many times, it is customary to choose a fixed type of fan, which often ignores the actual working point, resulting in high energy consumption and loud noise. Customization and high efficiency are the only way for fans to develop in the future. Suzhou Zepu is committed to this kind of thinking.
What are the core factors of starting a business? Entrepreneurship should have sufficient resources.
Many people are very short of resources when they start their first business. The lack of resources reduces the probability of success in starting a business, but it is impossible to have completely sufficient resources. Generally speaking, two conditions need to be met in terms of resources: one is to have the least resources to enter an industry, and the other is to have different resources. If none of the conditions are met, there is little possibility of success in starting a business.
Entrepreneurial resource conditions mainly include several aspects:
Commercial resources: what is the mode of making money;
Customer resources: who will buy;
Technical resources: how to win the dependence of customers?
Managing resources: how to operate;
Financial resources: whether there are enough start-up funds;
Industry experience resources: the accumulation of information and common sense in this industry;
Industry access conditions: some industries are protected and restricted by some policies and need to enter the qualification conditions;
Human resource conditions: whether there are suitable professionals.
Entrepreneurs with the above resources do not need to have 100%, but they must have at least some important conditions, and other conditions can be obtained through marketization. If entrepreneurs have enough financial resources, the shortage of other resources can also be made up; If there are enough customer resources, the lack of other resources is easy to change.
Entrepreneurial elements: think carefully before starting a business.
Before starting a business, you should think carefully, evaluate repeatedly, and consider maturity before acting. Besides adequate resources, psychological preparation is the most important. The following aspects are worth considering.
1. Why should I start a business? Are you determined enough to take risks? Are you willing to give up your past interests?
Second, do I have the abilities and qualities that entrepreneurs should have, can I withstand setbacks, have comprehensive qualities, or have special technical expertise?
3. What are the core resource advantages of my entrepreneurial success? What I have is: sufficient capital? Industry experience? Customer resources? Technological innovation? Does the business operation ability have obvious advantages compared with the upcoming competitors?
Fourth, do you have enough patience and endurance to get through the start-up period? Estimate how long it will take you to get through the start-up bottleneck stage and how long you have to prepare.
Fifth, what is the biggest risk of starting a business, what is the worst result, and can I bear it? Don't just think of the optimistic side, you must be fully prepared for the risks, otherwise, your confidence will be shaken when the actual situation is different from your imagination.
Answer the above questions clearly before deciding whether to start a business. Many entrepreneurs fail because they have not made enough psychological preparation before starting a business. They rushed to start a business and finally failed in a big mess. If they are not prepared enough and the conditions are not available, it is not too late to start a business again.
Entrepreneurial elements: start a business first, then start a business.
Enter the industry to work for others, and accumulate experience and resources through work experience. Then the "tuition fee" will naturally be paid by other bosses.
Many people start businesses under the pressure of survival, hoping to earn more money and live a better life. So at the beginning of starting a business, there was no career, and the choice of starting a business was blind. Starting a business for the sake of starting a business, before starting a business, what industry to enter and what profit model to adopt are all at a loss. Many entrepreneurs register their companies with their business scope in mind.
Before starting a business, entrepreneurs must have a clear entrepreneurial direction before deciding to start a business. If you choose an industry, you must accumulate some experience in this industry and collect relevant information before starting a business. If possible, you can first consider entering this industry to work for others and accumulate experience and resources through work experience. Then the "tuition fee" will naturally be paid by other bosses, so you don't have to pay the tuition fee if you start your own business. You have industry knowledge, customer resource channels and profit model. If you start a business again, success is just around the corner.
Entrepreneurial elements: business ability is the most important.
The ability to make money is the most important thing. As long as you have excellent management skills, you will naturally find investors. Many investors are looking for good project investment every day.
Many young people put too much emphasis on the influence of financial factors when starting a business. Actually, it is not. Although capital is very important in entrepreneurial conditions, the most important thing is the entrepreneur's personal business ability, especially business ability. If capital is the fundamental factor, well, I will give you an investment of100000. What do you do? What do you use to make money? I think, I'm afraid many people can't guarantee and don't know what to invest, so financial factors are not unique.
In the early days of starting a business, the ability of entrepreneurs is very important, and they have to do it themselves. Starting a business is not an easy task.
Among the personal abilities of entrepreneurs, business ability, customer development ability and comprehensive contingency ability are very important. In fact, entrepreneurs are often business managers, who can get orders and do everything well. Many successful entrepreneurs come from the business world. With customers and orders, natural things become easy.
For aspiring entrepreneurs, it is very important to constantly build their own business capabilities. It's a good idea to start by learning to do business. When you have the ability, there are naturally many opportunities to start a business. Now the economy is developing rapidly, and it is also an era of making money by ability. In the face of various business opportunities, business ability is the most important.
What factors determine the service life of real stone paint? The service life of real stone paint is determined by its own quality and construction technology. The emulsion quality of real stone paint can be divided into styrene-acrylic emulsion, pure acrylic emulsion, silicone-acrylic emulsion and elastic emulsion. Chen Guang real stone paint basically has only elastic real stone paint and super weather-resistant real stone paint, and each quality determines its different service life. However, a good coating must be combined with strict construction technology to play its role. Therefore, it is best not to omit the procedures of scraping putty, brushing primer, framing, spraying real stone paint and topcoat. The complete construction technology can ensure the effectiveness of real stone paint to the maximum extent.
What are the methods of dynamic balance of centrifugal fan? Centrifugal fan, environmental protection technology, starts the fan. After stable implementation, measure its amplitude A0 with a vibrometer at M point (such as bearing seat) which can best reflect the vibration of the fan, and stop after recording.
Divide the circumference of the front disc (or back disc) of the impeller into three equal parts, and record them as 1, 2 and 3 points respectively.
Clamp the pre-made clamping block P at the point of 1 (the mass depends on the size of the fan impeller, generally MP = 150g ~ 300g), repeat the step of 1, and measure the amplitude of point A 1.
Change the position of clamping table P to 2 o'clock and 3 o'clock, repeat step 3, and measure M-point amplitudes A2 and A3 in turn.
Draw a circle with A0 as the radius and O as the center, and divide the circle into three equal parts, namely O 1, O2, O3; Make an arc with O 1 as the center and A 1 as the radius; Make an arc with O2 as the center and A2 as the radius; With O3 as the center and A3 as the radius, the three arcs intersect at points B, C, D, C and D respectively.
As the center of mass of BCD, point O4 is the light spot. Connect the O4 line and extend the intersection o to point O5. Point O5 is a point edge with counterweight iron, and the length of O4 O4 is L, so the counterweight mass at point O5 is m =mp×A0/2L.
Find out the actual O5 position on the circumference of the front disk (or rear disk) of the fan impeller, and weld the iron block firmly with the counterweight of M.. At this point, the dynamic balance of the centrifugal fan is completed.
What are the factors that determine the service life of gas masks? Before using the gas mask, the staff should receive systematic training, and have a deep understanding and understanding of the overall and component functions of the gas mask to avoid accidents during use. First of all, the staff must first confirm the type of gas mask filter. At present, there are four kinds: ordinary filter, multifunctional filter, comprehensive filter and special filter. Secondly, note that different types of gas mask filters have different protection time and must be treated differently. Generally speaking, the higher the level, the longer the protection time. If the working environment of workers is toxic, dusty and smoky, it is necessary to use a comprehensive filter, which is determined by the nature of different types of filters.
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How to determine the effective service life of gas mask filter? This needs to be comprehensively considered according to various factors such as different use situations and use environments. Generally speaking, gas type, concentration, temperature, humidity, air pressure, user's breathing frequency, working intensity and other factors will affect the service time of the filter element. Therefore, there is no definite time for the service life of the filter element. Users can make corresponding filter tank replacement plans in advance according to their specific use conditions, work protection experience and use records. The service life of a tank or cylinder can be determined by empirical judgment. If users smell pollutants, or feel dizzy, uncomfortable or other conditions, they should leave the polluted area immediately and replace the filter in a safe place. The expiration time of the dust filter box and the dust filter part of composite filter can generally be judged by the increase of its breathing resistance and its inability to breathe.
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However, there are some special gas mask filters that need to be judged and handled in a special way. For example, the carbon monoxide canister is packaged in the factory and can only be used once. The longest service time of the special filter for filtering mercury is 50 hours. It cannot allow other gases to penetrate the filter prematurely. If other gases seep into the filter, the filter must be replaced as soon as possible. The special filter for flue gas containing nitrogen compounds can only be used once.
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According to the above situation, it can be seen that the role of gas mask filter element is very important, and its effective service life is judged according to the influence of various factors such as different models, use environment and user frequency. This is also a link worthy of attention and attention in the use of gas mask filter.
How to make the service life of centrifugal fan longer? 1. Do not start continuously. Start at regular intervals.
2, fan cooling, keep the fan reasonable temperature.
How to prolong the service life of air-conditioning centrifugal fan? We bought a good fan. Our fan has been used for 15 years. Under normal refueling conditions, we don't need to change a screw.
What are the factors that cause the wear of Retz centrifugal fan? Long-term use of Leitz centrifugal air may cause some parts to wear to varying degrees. Dongguan Tian Rui Electromechanical Technology Co., Ltd. analyzed the factors that caused the wear of Lai Ci centrifugal fan as follows:
1, erosion wear; After entering the impeller, solid particles interact with the wall. In the inlet area of the centrifugal flow passage and the whole axial flow passage, the solid particles basically collide with the wall at a non-zero angle of attack, and then bounce back to the reflux passage under the comprehensive action of the entrainment of the airflow and its own inertia. The resulting wall material wear is a typical erosion wear.
2. Abrasive wear; In the outlet area of centrifugal flow channel, dust particles move in the flow channel for a long distance, and most of them collide with the wall many times, basically sliding or rolling along the pressure surface, which has a certain pressure on the wall surface, so the wear of backing material is abrasive dust particle wear, and the concentration of dust particles in the area near the pressure surface further aggravates the harm of dust particle wear.
The abrasion of Retz centrifugal fan can be divided into several categories:
1, fatigue wear; Fatigue wear is the surface crack or scale shedding caused by surface fatigue stress (or temperature or impact). Judging from the damaged impeller, the wear conditions and parts of various types of impellers are different. But the wear forms are mainly the above, and they are all regional wear. The wear parts are mainly near the blade working face and back plate.
2. Erosion and wear; The surface wear caused by solid particles scouring the metal surface is called scouring wear.
3. Abrasive wear; In centrifugal fan, the relative movement between solid particles and the surface of parts at a certain speed will cause abrasive wear. The wear of the contact surface of scraggy is due to the filing action under relative motion or the grinding action of solid particles dispersed between the interfaces. It has the greatest influence on the degree of impeller wear.
4, adsorption wear; Under the same other conditions, even if the machining accuracy and cleanliness of the machined surface are improved and they are better matched with each other, the wear will not be reduced. On the contrary, due to the tight interface, the molecular adsorption effect is obvious, which intensifies the interface wear, which is called adsorption wear.
What are the factors that determine the service life of insulating glass? 1) Selection of desiccant: A pure 3A molecular sieve insulating glass desiccant with high adsorption, low powder content and low air intake should be selected.
2) Selection of sealant: sealant with good sealing effect, good anti-aging effect and low volatile content should be selected and double sealed.
3) Production process control: temperature and humidity of the construction environment and air cleanliness; It is generally considered that the bending mode is better than the corner insertion mode by using the scientific combination mode of spacer frames and the special glass cleaning device.