Rotary mower
Rotary mowers or Rotary mowers are used in agriculture to mow grass (either for fresh forage, hay or silage). They belong to the rotary mower and mow the free section. They are based on a development from 1963 by Piet Zweegers from Geldrop and in 1964 brought by his company PZ Zweegers first time on the market. In order to achieve a pleasing result even with light cut crop, blade tip speeds of up to 85 m / s are required. Rotary mowers are grown mostly on the tractor front and / or rear and is driven by a PTO shaft. In addition, towed or self -propelled variants in use, which allow a greater working width.
Benefits
Rotary mowers are less prone to interference; maintenance is low. They have a high operating speed and large working widths; thereby achieves a high area performance ( effectiveness ).
Disadvantages
Because of the rapidly rotating parts, a heavy duty is needed, which require a high performance and capital requirements. Similarly, protective measures necessary against flying debris. The crop contamination is higher in comparison to bar mowers. Small animals and young wild have the high impact force usually no reasonable means of escape.
Types
Trommelmähwerk
The drive of the two drums ( image ) with the diameter rotors from above. Both turn to the center. Thus they allow a decent high swath, so you can go at the next crossing on the turf. Therefore mowers are often Drum. They still operate reliably even under the most difficult conditions. The usual working width is around 1.50 to 3.00 m.
Scheibenmähwerk
The disc mowers, the drive is via a gear below the discs. Thus, a lighter construction is achieved, which allows for greater working widths. They are usually used in conjunction with conditioners. Usual working widths are 1.20 m to 3.50 m. Solid variants reach 5 m.
Great mower
Large mower units are made up of three individual Kreiselmähwerken that are either attached to the three-point linkage of the tractor or mounted on a separate carrier vehicle. They are also referred to as Schmetterlingmähwerk. This system is because of its working width up to 10 m and the simultaneous green waste conditioning very powerful intensive and therefore expensive and therefore worth only with appropriate farm size, working groups or contractors.
Additional equipment
Swath serve the crop to move in a narrower swath, as would be the case by the filing of the drums or discs. Among other things, it is desired in front mowers so that the crop is not compressed by the tractor wheels to the ground. They are plate-shaped, mounted vertically and operate on the principle of the star rakes. Usually enough a pair of discs, there is also duplication. Swath are also partly used to balers or loading wagons to ensure a secure reception wider swaths.
Swath merging: conveyor belts or screw conveyors transport the crop to a swath. Applied this procedure if adequate drying due to the weather is not possible, as in the last cut in autumn is usually the case. With the swath merging crop contamination and the workload can be reduced. Moreover, the method is applied when the good weather would cause an extremely strong Anwelkung for wide distribution. As an interim solution of a Dreifachmähwerk even a swath is led to the center, and then merge the grass lot of 2 Mähwerkarbeitsbreiten in a crossing of the swather. Thus, a 2- rotor rake with 6 meter working width absorb the grass of two tracks of a 9 -meter Schmetterlingmähwerkes.
Conditioners serve the grass so kink, crush and spread wide that it dries faster. This can be saved depending on weather conditions, an operation with the tedder. Conditioners improved by their promoting effect the flow of material in disc mowers.