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07-24

1. Selection of large air compressor equipment should be closely related to the production process of enterprises and future production. Starting from reality is to engage in the equipment staff due quality. At present, there are various models and specifications of equipment on the market, each equipment

Discussion on the principle of selecting type of air compressor equipment

Selection of large air compressor equipment shall be appropriate to the production process of the enterprise

The equipment of air compressor is closely related to the future production. Starting from reality is to engage in the equipment staff due quality. At present, there are various types of equipment in the market, each of which has its specific application space and market share. Some are good at implementing functions, some are good at saving costs, some are good at improving efficiency, some are good at advancing technology, and some are good at low failure rate. In order to save the cost of efficient equipment, the key to low fault rate of advanced equipment is to give full play to its advantages under the existing conditions of the enterprise, and adapt to many factors such as the enterprise's own process, management level, supporting facilities, technical strength and repair personnel skills.

If some enterprise advocate large-scale in the equipment update, select some big specifications of the equipment, in order to improve the efficiency of production, the equipment is big, efficiency has backfired, and the reason is ignored the equipment of large scale is a systems engineering, such as some bottlenecks in the process can't solve, only talk about a certain equipment becoming larger in isolation, often lead to big mara car situation, lead to higher comprehensive cost, do more harm than good.

The phenomenon of "big horse-drawn trolley" is very common, which is caused by two reasons:

Firstly, during the model selection stage, the air compressor selected by engineers is usually higher than the maximum demand of driving load.

Second, the load applied to the air compressor is inherently variable, and the size of the air compressor chosen must meet the maximum load, in fact the maximum load is only intermittent, while other time loads are much smaller.

Let's look at the results and performance:

The vast majority of factory air consumption changes all the time, and as it goes down, air pressure begins to rise and vice versa, which in turn proves two things:

First, air air compressor capacity must be greater than consumption. The low pressure setting of the pressure switch must meet the pressure value required by the factory. Second, the low pressure setting of the pressure switch must meet the pressure value required by the factory.

Second, how to view advanced nature

It is the common goal of equipment manager and manufacturer to pursue the advanced technology of air compressor equipment. When selecting equipment, enterprises should do some forward-looking work in combination with the needs of production development of enterprises and the trend of domestic and foreign technology development, to avoid selecting backward models and models that will be eliminated, so as to avoid a series of problems such as difficult supply of spare parts in the future.

In the pursuit of advancement, enterprise managers should first clarify the purpose of pursuing advancement and the problems to be solved. Use the principle of value engineering to divide the function of air compressor, and determine which functions are necessary, which are excessive and which are auxiliary. It should also be realized that when choosing a new technology, it is necessary to examine whether it has good application performance in the same field or similar fields, whether it is a mature technology and whether it has application prospect. Any new technology, no matter how mature it is in theory or how advanced the design means, will inevitably have some problems in industrial application. While the manufacturer is improving these problems in the future, the equipment of the enterprise will reduce the universality of parts and even be eliminated due to the changes of relevant sizes and parameters, which will cause great waste and bring difficulties to the management in the future. Such risks must be objectively assessed and taken seriously. Blindly choosing equipment and technology without industrial testing in the spirit of "the first crab to eat", the consequences are not optimistic. If a domestic enterprise two years ago chose a device, the only one in the country, now it is still running at a high cost.

3. The selection of air compressor equipment shall comprehensively inspect the equipment manufacturer

No equipment, no manufacturer, can be perfect in design and manufacture. Choosing a device means choosing a service. Therefore, it is necessary to know as much as possible about the manufacturer's technology research and development capability, operation mechanism, market strategy, manufacturing strength and production and operation situation before selecting equipment.

In order to seize the market, some manufacturers usually sell the equipment at a lower price. After users buy the equipment, they make profits with high spare parts costs. Some manufacturers tentatively set foot in some areas, their own research and development strength is insufficient, in the industry prospects or lost competition, quickly quit the industry; Some enterprises are difficult to operate, the financial situation is not good, once the situation continues to deteriorate, will face the possibility of merger and bankruptcy. Choosing the products of these enterprises will leave a lot of trouble for spare parts supply and product service. We should have a deep understanding of the operation of these enterprises and look for honest and promising partners.

Iv. Air compressor technology, universality, interchangeability and standardization of parts and components

When selecting equipment, the universality of equipment parts and the interchangeability of existing equipment should be maintained as far as possible, and standard parts should be adopted as far as possible. This will not only facilitate the management and procurement of spare parts, but also effectively prevent the exclusive production of the manufacturer because of the technology patents involved. Although some imported equipment is also a well-known brand, due to the small number of domestic sales, the service level is often difficult to achieve our expected results. For example, a lot of commonly used bolts, nuts, bearings, seals and so on are mostly manufactured in English standard, with poor universality. As a result, some very small spare parts are dependent on imports, and the purchase cycle of spare parts is relatively long, which affects production. Therefore, in order to guarantee production, enterprises have to increase their inventory, resulting in large amounts of capital being occupied.

In fact, in the field of general air compressor, domestic brands are not inferior to foreign brands in terms of product performance and quality, but have more advantages in after-sales service, purchase price, maintenance cost and other aspects. The author suggests that the equipment that is not produced in China should not be purchased as much as possible, which will save a large amount of cost for the subsequent operation of the enterprise.

Problems related to production and use

The use of equipment is not isolated and the matching of equipment and production process parameters in the production process should be fully considered. Also consider local natural resources, maintenance equipment, repair level, government policies, transport conditions, spare parts supply constraints.

We only take the market risk in purchasing frequency converter as an example. After more than a decade of rapid development, the screw air compressor has replaced the piston, has also become a red sea. Work frequency machine is all over the street, fight price already let everybody almost have no profit to be able to plan, so a few have ability to have enterprising manufacturer, begin to return to original intention, understand not to innovate, do not research and develop only dead road a reason. So, permanent magnet frequency conversion, two-stage compression, bipolar, all-in-one machines sprang up, and everyone felt as if they were grasping at the straw. The "revolutionary" technology of permanent magnetic frequency conversion has become the object of publicity. But, as many sales force say, permanent magnet converter can adapt to all working conditions and gas demand, to achieve perfect energy saving? In this regard, we need a pertinent answer to provide theoretical support for user procurement.

Indeed, the amount of energy saving depends on the amount of energy saving, which depends on the working condition of air compressor and the parameter setting of frequency converter. The biggest factor is the working condition of air compressor. When the customer's gas consumption condition fluctuates greatly, its energy saving effect is better, the most direct data is the time of no-load accounts for the proportion of the total working time. This makes sense, but it is clear to all that no customer would choose an air compressor that is too different from the actual working condition. For example, the customer's air consumption is 5 cubic per minute, while the customer chooses 10 cubic per minute air compressor, which is almost impossible. The sales staff's propaganda is based on the fact that when customers choose the air compressor, they will not choose the air compressor which is completely consistent with the actual situation, and always leave a margin of about 10%. This is true, but as a user, you must have your own judgment and not fall into the trap set by the salesperson.

In fact, up to now, the energy consumption of machinery in China is measured by the ratio power of full load. Only the high-precision screw head with high-efficiency motor and reasonable layout design of air compressor can achieve the specific power of level 1 energy efficiency. We can see in the market that many screw machines with variable frequency control are not up to level 1 energy efficiency. This requires that, when purchasing equipment, air compressor users should conduct comprehensive investigation and evaluation on the quality and performance of the equipment, instead of choosing the equipment at a lower price.

Therefore, the choice of air compressor, different enterprises have different needs, only for their own, is the best; Only the equipment you can control can give full play to the due efficiency. Equipment selection is risky. Enterprises should establish an effective assessment mechanism and selection procedure to effectively avoid various risks and increase competitiveness by selecting equipment with high efficiency, energy saving, high cost performance and low comprehensive cost, thus laying a good foundation for the development of enterprises.

 

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