Structure And Function Of Straw Chopper Of Farm Corn Combine Harvester

As an accessory product of the farm corn combine harvester, the chopper can crush the stalks thrown from the scraper or the separate drum and return it to the field. With the further implementation of my country's environmental protection policies, many Regions have successively promulgated regulations prohibiting the in-situ burning of stalks. As a result, people began to demand higher and higher farm corn combine harvester shredding devices.

The chopper is one of the most power-consuming functional components in the farm corn combine harvester, and its work quality is affected by many factors. If the shape of the blade is not well designed, the power consumption will be doubled, causing undesirable results such as vibration; if the interface is not handled well, it will easily cause blockage and so on. Another function of the blade is to ensure the shredding quality of the material, so from the design point of view, the arrangement of the blade on the shredder drum, the shape of the blade, and the interface method should be considered first.

Due to the blade type and the transition interface of the shredder, the traditional shredding device often has problems such as uneven shredding length and easy blockage, resulting in damage to the relevant parts of the farm corn combine harvester. Today, experts from Weixin Agricultural Machinery will explain to you the structural function and working principle of the corn combine harvester cutter:

1. Structure And Function Of Straw Chopper Of Farm Conrn Combine Harvester

The stalk chopper of the jade bead harvester is mainly composed of a chopper drum, a knife holder, a movable blade and a fixed blade. On the shell of the chopper, use a material deflector to connect with the host.

1). Roller and knife holder

The chopper drum is made of φ121X5 seamless steel pipe, and the two ends are welded with shaft heads. The movable knife seat is formed by 5 thick plates and welded on the chopper drum in strict accordance with the spiral configuration to ensure that the movable blade has a uniform load and small fluctuations during operation, thereby reducing the vibration of the machine. The fixed knife holder is composed of a long hole uniformly machined along the length of the chopper on the bottom plate and a fixed knife beam, and the fixed blade is fixed on the long hole through the long hole.
On the fixed blade beam, the angle of the fixed blade can be adjusted according to the different crops and needs to obtain different cutting lengths of stalks.

2). Blade

The movable blade is applied on the chopper drum in combination with a helix configuration and a fixed blade. During the work, due to the high-speed rotation of the chopper drum, the friction between the stalk and the blade is large. In order to reduce the wear of the blade, fully consider the blade Material and shape, the material is 50CrVa, the surface treatment hardness is RC52 ~ 56, and the geometric tolerance requirements are increased, and the contact area of the fixed blade is reduced by a part. This can reduce the power consumption of the chopper and overcome the clogging of the chopper due to the excessive friction between the chopper blade and the stem.

3). Material deflector

A material deflector is installed at the inlet of the boom shredder and the material outlet of the main machine, the lower part is hingedly connected with the shredder shell, and the upper part is fixed on the side wall of the machine with bolts, so that the material discharged from the scraper or the separate drum can be smoothly discharged. Entering the chopper, in order to prevent the stalk from accumulating and blocking on the deflector during the process of entering the chopper, many experiments were carried out on the natural end angle of the stalk landing on the iron plate. , The installed material deflector can play the role of material diversion completely. When the farm corn combine harvester does not need to pulverize the stalks, the fixing bolts of the material deflector can be loosened and re-fixed on the rear tail cover of the machine. Under the action of the deflector, the material directly falls without the chopper. on the ground. This keeps the crop stalk intact without removing the chopper.

2. Working Principle Of Straw Chopper Of Farm Corn Combine Harvester

After the stalk is thrown from the scraper or the separate drum, it falls on the material deflector. After the material enters the chopper along the deflector, the stalks are crushed under the combined action of the high-speed rotating moving blade and the fixed blade. At the same time, under the action of the strong airflow generated by the high-speed rotation of the moving blade, the stems are thrown from the thrower. In order to make the chopper work stably and reduce vibration, the dynamic balance level of the chopper drum after installing the moving blade is designed to be 6.3, and the theoretical maximum dynamic balance is 1.471N.m.