The development of hammer mill - A mill - machinery industries

The development of hammer mill - A mill - machinery industries

1, hammer mill speed of evolution

1. From single-speed to double speed, the first hammer mill has only one speed, MIAG 50s in the last century, the development of the H880 type hammer mill also is equipped with two different motor speed so that the company was not only in the granulation, but also in areas hammer smash leading. The model can be described as the first real match of materials for the industrial hammer mill. At that time, the rotor speed 3000r/min people is respected.

2. From a high speed to low speed: in the next few years, attention focused on reducing the work of hammer mill noise on one of its major initiatives is to reduce the rotor speed is generally reduced to 1000 ~ 1500r/min. Hammer in order to maintain proper end of line speed, pulverizing the same time is bound to increase the rotor diameter. Biihler-Beka company developed the first generation of such models??? Zinal series crusher, the rotor diameter is about 1100 ~ 1200mm, crushing chamber width 350 ~ 650mm. Then there is known as a large mill products are emerging, such as the Lame-miag typical products, the crushing chamber diameter of 1200mm, sieve plate widths up to 1100mm; Amanduskahl produced Akana2000 type, the rotor diameter of 1200mm, screen plate width of 1000mm, is equipped with power 355kW; Afall / zaragoza company's products, its crushing chamber diameter of 1446mm, width sieve over 1100mm.

2, hammer mill structure similarities and differences

Comprehensive variety of information can be found, most of the hammer mill despite many similarities, there is still a significant difference, the important reason is that materials of different plant materials used. Europe, mostly mixed-grinding plant material (the first ingredient and grinding), and often there is no grain materials; and most of the material formula is based on the U.S. 50% corn or wheat-based, rarely used such hard grinding oats, grains like barley, raw water is also slightly lower than in Europe; domestic situation similar to the latter.

Most of the hammer mill has structural symmetry, With function of rotor hammer on both sides to take advantage of the characteristics of shape over the top with a bevel angle of the rectangle, while water droplets are more popular style, speed mostly 3000r/min or 1500r/min around. The main difference between their products in the United States to pursue sieve plate area, and pay attention to the impact of European tooth plate large area. For example, the United States Champion companies and Jacobson companies advertised their products for the entire week screens, while Europe is the most typical Dutch VanAarsen company's 2D series hammer mill, the impact of tooth grinding plate area of nearly the entire area around the outside half (46%). Second is the sieve plate installation. U.S. hammer mill is installed, replace the sieve must be shut down and open the cabinet to carry out, many of Europe from the hammer mill axial plug-in, without downtime, and can open the case out of the original sieve plate, insert a new-for-sieve; have models available along the axis of the end of the insert out from the other end, a further remote control can also automatically change screen, VanAarsen company's 2D series of hammer mill equipped with a remote control on both sides electrical equipment for screening, in operation can be replaced.

View of this, hammer mill were two types of development, the choice of raw materials should be in accordance with their characteristics to be considered.

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