parsing cutting efficiency crushing plant

Chipper shredder chipper shredder is forestry biomass chipper crushed to compact molding process requires particle size of the device. Chipper shredder processing mechanism is

to first forestry biomass material into the chipper shredder hopper, the material of human and pass under its own weight

Through the inlet into the chipper shredder, when the material face encounter knife knife drum (cutter) face, the feed is stopped, cutting knife to the cutting position, because

there is a certain angle knife when cutting wood a certain depth, the timber by the knife blade cutting surface and bottom hinder contribute

, Local wood fiber direction along the crack into the wood, from the rake face fly. The cutting process, the wood weight and knife cutting force the action to continue to Drum

(cutter) feed, the cutting can be carried out continuously, complete the timber are processed, cut the large chips on machine

Inside the high-speed air driven with crushing equipment hammer collision further crushing, while substandard chips through the bottom of the screen along the discharge port.

Small drum chipper shredder is mainly for smaller diameter class forestry biomass materials, especially in the northwest region's rich desert shrubs resources because desert

shrubs bark content, toughness, slightly tender part of a long, easy to cut (cut rate was 50%), in order to increase cutting

Agencies and cut the frequency of contact materials to be processed and improve equipment efficiency, choose to use a long knife, throwing knives and cutting the gap between the

fixed knife set can be adjusted, and select high cutting speeds, so for different The material is adjusted to improve the cutting of materials

Rates, lower tender little chance of winding drum knife; while reference straw, rattan and other grains, feed mill hammer design, plus a number of knife drum crushing hammer,

increasing the material in the enclosure by the impact, friction, and improve shrubs, branches, straw-like material crushing chipper

Results. Ideally, the longitudinal direction of the fiber material should mainly be cut by the knife, the material separation between fibers mainly by the crushing hammer to

complete. The aircraft is equipped with a power source to a Taiwan 2.2kw maximum speed 2800r/min Rated power three-phase asynchronous motors,

The V-belt reducer motor power is transmitted to the spindle; choose manual feed mode (if in the future for mass production, can be equipped with force feeding) and a lower

discharge mode, which would allow chipper cutting small particles can also be from the chassis more convenient discharge, chipper shredder

Spindle is horizontal, gravity knives and cutting drum vertical component shared equally by the two bearings, the prototype compact structure, small size, low center of gravity,

processing and moving relatively stable, suitable for field use in harvesting.

Chipper shredder vibration is caused by mechanical vibration measurement equipment structural damage and reduce the life of the important reasons. In addition, the mechanical

structure of the vibration of the noise generated mainly. Vibration on the human body will produce great harm, prolonged exposure to vibration environments who will lead

From a wide range of illnesses, we can see that vibration control is necessary. Rotary machine in operation will have a greater vibration, for the surrounding environment;

chipper is a rotation of the elastic system, under certain conditions (for example, when the rotary member imbalance or cutting force variation) will produce laser

Vibration force vibration. When the amplitude exceeds the allowable range, will cause wood processing surface roughness, tool wear and tear, reduced productivity, and in severe

chipper shredder can not even work.

Measuring points to determine the location of wood chippers of the vibration load is mainly driven member transmitting motion of spindle rotation and vibration generated when

the engine vibration; work mainly from the vibration is vibration of the engine and the knife drum (cutter) Cutting vibration generated when the timber. To understand the

Chipper shredder vibration characteristics of the prototype load speed vibration test, the prototype uses the electric motor as the power source, the main source of vibration

spindle drive components should be generated when the vibration transmitting motion. In the prototype spindle and chassis were set five measurement points, respectively, knife

shaft ends

Bearing top measuring point 1, the measuring point 2, the two sides of the chassis measuring points 3 and 4 measuring points, the top surface measuring point 5, each measuring

points are arranged on a portable vibration measuring instrument, the use of data acquisition cards.

Experimental results, the pulley 1 side bearing measuring point 1, the housing 3 Vibration velocity measuring point is greater than the other side of the corresponding measuring

point 2, the measuring point 4, which is due to the biomass chipper end mill shaft 1 rigid with the pulley connecting the motor to the power transmitted through the belt

mechanism prototype spindle

The spindle drive Drum doing rotational movement to complete the cutting operation, the transmission process of the belt tension will cause the spindle discontinuity, pulleys

one side bearing excessive force increased wear, inspired spindle vibration, transmitted to the spindle the other side of the bearing and vibration transmission to the housing;

another

In the cutting process of crushing with cutting speed increases, the value of each point vibration velocity gradually increases, when the speed is higher than 1231r/min when

increasing trend more apparent.

When the chipper shredder load high-speed operation, the noise level values ​​increase with the speed a clear upward trend in the speed reaches 1231r/min, the noise level can

reach values ​​87.4dB (A). Chipper shredder noise enhancement, mainly due to the vibration of the body with the speed increase

Increase triggered, and since the chassis Drum rotates blade on the drum cutter device speed cutting surrounding air, causing the chassis air pressure pulse will produce noise.

Conclusions and recommendations of the foregoing analysis, the rotational speed is chipper shredder chipper shredder noise intensity and vibration intensity main factors, when

the speed is increased chipper shredder sound pressure level noise and vibration velocity values ​​were significantly increases, the material of forestry biomass chipper crushed

Quality and equipment operators adversely affect the health of the corresponding experimental data in the actual production chipper shredder speed should be controlled at

1231r/min less.

To further reduce the noise level and vibration velocity values, chipper shredder power transmission can choose to use flexible couplings achieve chipper shredder is directly

connected to the spindle motor, belt drive means to cause to eliminate unilateral pressure shaft large side of the machine vibration imbalances

Like; addition to the chipper or shredder housing for increased thickness for external stiffener treatment can increase the natural frequency of the housing itself, thus to

improve their structural stiffness and strength, reduces vibration and noise radiation housing, control vibration transmission.