Shakers are mainly divided into two categories, mine shakers and food shakers. It works by using the compound-type vibration generated by the vibrator excitation. The vibrating screen is an upper rotating weight of the vibrator to generate a plane swirling vibration on the screen surface, and a lower rotating weight hammer causes the screen surface to generate a cone-shaped rotary vibration, and the combined effect of the vibrating screen causes a multi-rotation type vibration on the screen surface. Its vibration track is a complex space curve. The curve is projected as a circle in the horizontal plane, and the projection in the vertical plane is an ellipse. Adjusting the excitation force of the upper and lower rotating weights can change the amplitude. Adjusting the spatial phase angles of the upper and lower weights can change the curve shape of the trajectory of the screen surface and change the trajectory of the material on the screen surface.
Analysis of the vibrator market During the “12th Five-Year Plan†period, the state encourages the acceleration of the construction of large-scale modern coal mines. By 2015, the production of over 50 million tons of ultra-large coal mines will account for more than 65%, forming 20 large-scale 10 million to 40 million tons. The enterprise group, the vibrating screen industry will also maintain strong demand. In addition, the "Emerging Energy Industry Development Plan" will include the localization of large-scale complete set of washing equipment in one of the 16 key projects to revitalize the equipment manufacturing industry.
It is understood that the vibrating screen equipment market is extremely fragmented, with the downstream mainly in industries such as coal, iron and steel, road construction, and mining, and the demand in the coal and steel sector accounts for more than 70% of the total demand. In markets with a total capacity of nearly 10 billion yuan, there are only a handful of local companies that earn billions of dollars. The relatively small scale leads to a much weaker design and manufacturing capability of local companies than leading foreign companies. The complete set of equipment for the new large-scale coal washing plant can only be provided by foreign companies.
Development direction of vibrating screen market 1. Towards high efficiency and high output: The process of modernization of the industry has led to an increase in the scope of the company, a significant increase in the production capacity of the sand making equipment, and the matching of high-efficiency and high-capacity screening machines.
2. To standardize, serialize, and generalize development: This is the way to facilitate planning, construct specialized production, ensure quality, and reduce costs. According to the three different movement trajectories of vibrating screens, the differences in the screening process were accepted, and in response to the special requirements of various industries in the economy, various types of vibratory screening equipment were formed and used in the industrial sector.
3. Increase of vibration intensity: The vibration process of the screening machine is gradually strengthened, that is, the vibration parameters of the screening machine are increased to obtain greater speed and acceleration.
4, to light, environmental protection, layout to simplify the development of: the old 1980s vibrating screen, changing the network is not convenient, pressure mesh bolts have 48 per layer, change the time for a network of at least 4 hours, and high mesh number of powder Easy to leak from the bolt. With the continuous improvement of the vibrating screen requirements of the industrial sector, old vibrating screens will gradually be eliminated. The new vibrating screens should be developed in the direction of lightness, environmental protection, and simplified layout in order to meet the requirements of industrial and chemical departments.
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