The development direction of fans is large capacity, high pressure, compact structure, low energy consumption, low noise, high efficiency, good plasticity, and strong exhaust purification capacity; generally skid-mounted without foundation, full-cover low-noise design, greatly saving installation , Basic and commissioning costs; continuous development of new types of gas valves operating under variable operating conditions, greatly improving the life of the gas valves; in product design, the application of fan thermodynamics, dynamics calculation software and its working process simulation software, etc., to improve calculations Accuracy, through the comprehensive simulation model to predict the performance parameters of the machine under actual operating conditions, in order to improve the success rate of new product development, and strengthen mechatronics.
The centrifugal fan is mainly composed of an impeller and a casing. The impeller of a small fan is directly mounted on the motor, and the large fan is connected to the motor through a coupling or a pulley. Centrifugal fans are generally single-sided air intake, using single-stage impellers; large flow can be double-sided air intake, using two back-to-back impellers, also known as double-suction centrifugal fans. The impeller is the main component of the fan. Its geometry, size, number of blades and manufacturing accuracy have a great impact on performance. The impeller must be corrected by static balance or dynamic balance to ensure the fan to rotate smoothly. According to the direction of the blade exit, the impeller is divided into three types: forward, radial and backward.
The business model of the fan industry is related to its product characteristics. Low-end products in the industry are basically standard parts, and companies usually maintain a certain inventory of finished products. High-end products are basically non-standard parts. Enterprises generally adopt the order production and direct sales service model, that is, after the enterprise obtains the product supply order through bidding, it arranges the product production according to the order. Industry high-end product suppliers improve their profitability and competitiveness by focusing on product quality, technology development, brand management, and after-sales service. In recent years, large and medium-sized enterprises in the industry have focused on introducing advanced foreign technologies, using foreign advanced technologies to improve and optimize existing products, stabilize production processes, and reduce product energy consumption and noise. At the same time, through the introduction of technology to improve product development capabilities, continue to fill domestic gaps, meet customer needs and improve the efficiency of business operations.
The technical level of the fans and part of the Roots blowers is close to or reaches the level of contemporary international similar products. Under the role of interdependence and mutual promotion, the nationalization of major national technical equipment and the comprehensive operation strength of the wind turbine industry have achieved coordinated development and continuous improvement. The implementation of national key technology and equipment localization policies has provided historical development opportunities for the wind turbine industry. After more than 20 years of unremitting efforts, it not only fundamentally reversed the passive situation of centrifugal compressors and axial flow compressors relying entirely on imports. At the same time, the wind turbine industry has gradually developed into a general equipment manufacturing industry in China, with production scale, technical strength, technological equipment, competitiveness, operational efficiency, and design and manufacturing technology in a leading position and close to the international advanced level in the industry.
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