Soft-type material crushing device's default

The whole structure and technical parameters based on solid fuel biomass pretreatment requirements, as well as research proposed cutting crushing principle, and after the design

of the main working parts and a lot of banana screen test to determine the wood-based biomass feedstock grinder, machine structure as shown. Agriculture

The machine can be applied to the whole class grinder high waxy, long fiber, high degree of lignification of cotton stalks, sunflower stalks and twigs and other biomass

materials crushing, wide adaptability, able to meet the biomass solid fuels forming requirements.

Where L1, L2 respectively, across the cutterhead cutting blade distance from the center, α is the angle between the two cutting blades. Cutter cutting, crushing unit and fan

installed on the same spindle, so the spindle speed for cutting, grinding have a great impact. This machine is calculated based on productivity

Spindle speed: zlrQn × = 260π (1) where, n is the spindle speed; Q is productivity, m3 / h; r the radius of the cutting material, m; l is the average length of the pulverized

material, m; z for the knife on the disc cutter number.

In the design of this mill productivity 2 ~ 3m3 / h, the maximum diameter of the cutting material is less than 15cm, the length of the crusher machine material 5 ~ 15mm, an average of

10mm, the cutting blade on the cutter number 5, so into Equation (1) to obtain the spindle speed of 850r/min. but

The mill is not only mounted on the spindle of the cutting knives, and the installation crushing hammer, the role of the hammer after cutting by the cutting blade thin strip of

material is further crushed, therefore requiring a higher speed to improve productivity, to ensure cutting, grinding effects, taking into account the spindle speed

To 1250r/min.

Notes: 1. Cutter disc 2. Cutting knives, L1, L2 respectively, the cutting blade on the cutter across the distance from the center, α is the angle between the two units of the

cutting blade is cutting force per unit length on the cutting edge of the knife cutting force , which is the most basic parameters of wood cutting, affecting short sliced ​​piece

unit cutting machine

Force main factors: species, wedge angle and cutting knife protruding amount of the cutter installation diagram, where δ is the wedge angle cutters, γ is the cutting knife and

the angle between the cutter, ε is cutting edge port the gap between the knife and the bottom.

Other component 1) pulverizing device is after cutting material into the crushing device, and then further pulverized to meet the requirements. In the pulverization apparatus,

the installation of four hammers, showing twenty-two symmetrically, each mounted hammer 3 to 4, the ends of each hammer processed into a trapezoid, which increases

The edge of the hammer, and each hammer are the blade, and enhance the crushing effect. Hammer parameters: length 235mm, width 50mm, thickness 8mm.2) is installed on the bottom

shell casing beside knives and knives, such as, thus cutting knives with cutting blades on the disc to form a cutting room, it is beneficial for physical

Material cutting.

By adjusting the amount of projection of the bottom blade cutter and bed knife to ensure that the gap between ε. On the opening in the housing inclined inlet port, in this

mill, the material in the cutting by the cutting blade tension <15>, so the feeding process without the feeding device to feed automatically. Also in the row

Spout with sieve, sieve mesh size of the particle size of the material according to requirements.

Examples verification in October 2009 in Beijing Daxing used as a raw material for cutting fruit tree pruning crushing test, pruning fruit trees, mainly from Daxing apple,

peach, etc. for spring fruit tree pruning, so moisture content lower than average 10% of the average diameter of between 5 ~ 8cm,

To detect mill productivity and power of the test with a diameter 10 ~ 15cm, more than 15cm branches for comparison tests.

Methods and instruments national standard reference test methods "feed mill test methods", test parameters including productivity, power consumption, noise, and crushed material

dimensions. Productivity per unit of time in which pulverized biomass feedstock volume, m3 / h; consumption using power analysis

Crushing unit time measured biomass feedstock required current, kwh/m3. The main instruments include the 3169-20 Power Analyzer, HS5633 sound level meter, SJ9-1 electronic

stopwatch, JJ1000 electronic scales, steel tape measure, thermometer.

Results and analysis in the testing process, the wood-based biomass shredders run more smoothly, work reliably, no strong vibration sense, able to meet the requirements.