German English

Stehr Silage compressor


Stehr, the innovative inventor and manufacturer of special-purpose machines, market leader of cultivating compressors, is launching a cultivator which solves a known problem in silage compaction. If one is using the relevant literature, it is found that to over 80% the silage material is not properly compacted during the introduction. The result is: poor quality through inferior silage. Silo or fodder is conserved high-quality green fodder for livestock, especially ruminants, especially cattle, because they are able to digest structural carbohydrates by fermentation in the rumen. Silication is also suitable as a preservation method for renewable raw materials, which serve as a source of energy in biogas plants. For this kind of preservation, all green feeds are suitable, among others grass (grass silage), maize (maissilage), clover, alfalfa, field beans, cereals (whole plant silage). By-products such as beet leaves and beet leaves can also be silted and thus used as cattle feed and substrate for biogas plants. Silages are used in biogas plants as an energy-efficient substrate. Maissilage is often used since maize allows a high yield of dry matter per area. Maissilage also provides a high gas yield during fermentation. When the silage is introduced into the known driving silos, good compaction is required. It is important that the organic silage is stored without cavities. In cavities there is a high oxygen content which contributes to spoil the silage mass. According to the state of the art, the compaction is often carried out by passing over heavy agricultural tractors. However, the tires of these tractors are designed in such a way that a relatively low ground pressure is exerted with them. This low soil pressure is, however, demanded by the majority of other operations in agriculture. A low soil pressure is required here in order not to damage the existing soil structure by high compaction, since no oxygen with CO 2 shares with the roots. However, this is important for a good, controlled and healthy growth of the plants. For example, the area pressure of a fully-loaded tugboat with 18 to. Total weight with approx. 2 kg / cm². If you look at the relevant, up-to-date literature, you will find that with this relatively small surface pressure over 80%, the required compaction values ​​are not achieved in order to obtain a high-quality feed or high-quality material for operating a biogas plant. For example, the optimum densification should be 200 kg / m³ for grass silage and 220 kg / m³ dry mass for Maissilage. These values ​​are not achieved in the prior art with conventional silage compressors.


His sense of the invention is:

To provide a compactor, hereinafter referred Silage compressor as an attachment for tractors, which solves the known problems in the compression of silage, eliminating the known disadvantages of the prior art and a better and faster compression process is achieved. It is important that the legally permissible total weight of the carrier with mounted compressor unit is not exceeded. This is important to obtain a fast mobility when moving on public road. Be the main feature of the invention is: to bring a great weight on a small contact area. For this purpose, any drive to achieve dynamic forces is necessary. Completely maintenance-free and user-friendly operation combine all advantages now known silage compaction equipment. This includes a blade with a net weight of over 2 to which the width of 3 -. 6 m can be adjusted hydraulically. To deflect the enormous shear forces from the front end of the tractor, a complete frame of the front lower link receptacle is attached below the rear axle. Three individually rotating, cylindrical roller body, similar to the known Sheepsfoot be appended on the worldwide standardized 3-point hydraulic connection to a tractor or loader and about the material to be compacted rolled back and forth (like a rolling pin). Preferably, the receptacle is designed as a quick-change device. The elevations on the cylindrical roller body are arranged so that they are offset in the circumferential strike the silo material. These increases are now running the entire weight of the compacting device in addition with half the weight of the carrier in the silage material. Thus, a high surface pressure on a small area is passed. Meet this high, vertically acting pressures in the heaped silo material. This voids the displacement that occurs during compression, closed and the lighter oxygen, which is located in the cavities can escape upwards. If the cavities are completely closed, the best compression is achieved. In order to ensure a large area power, a plurality of side staggered in a horizontal plane compression rollers are mounted. These rotate but all individually. In order additionally to increase the pressure on the compactor, an additional weight is attached. This is swung hydraulically using the Archimedean lever principle.

"Force times moment arm = load times load arm"

If the additional weight of adopted 2 to. a meter is pivoted about the center line of the cylindrical roller bearing body, which produces a linear load of 13 to. (Net weight of the compaction unit to 3. 6 + half Carrier weight to + additional weight to 2 2 + weight shift to = 13 tonnes).

In the proposed arrangement of several compaction rollers side by side the lead weight on a small area results in a line load of 13.000 kg. If this weight is now distributed adopted 36 cm (width of the elevations of adopted 6 6 cm x on the individual wheels) this results in a line load of approximately 360 kg / cm. By pivoting the additional weight, the permissible on public roads total weight of the carrier is not exceeded with Silage compressor. The additional weight can also be simultaneously designed as a sliding plate to flatten the introduced silage material. A quick and good compaction is several times, staggered back and forth driving thus achieved - the cavities are closed and the quality of the silage material is retained. In field tests in June 2010 when Landesbetrieb Agriculture Hesse, agricultural center Eichhof Bad Hersfeld as well as the farms Herbert Lang and Günther Vierheller in Schwalmtal-Storndorf was already determined when introducing the silage that almost double the amount of the material fitted to a silo. Here you could already guess how the compression with the Stehr-compressor, mounted on a Fendt 927, acted. The cavities were largely closed. Before taking in January 2011 has a density, measured in three locations found between 563 425 and kg / m³. This gives a mean value of 47% and 472 kg / m³. Dry matter. The very good quality of silage is the result of a very good compression, which has hitherto been achieved with any other known compactor.



Stehr Contact

Stehr Baumaschinen GmbH
Am Johannesgarten 5
36318 Schwalmtal Storndorf

Phone: +49 (0) 6630 / 91844-0
Fax: + +49 (0) 6630 / 91844-99
E-mail: info [@]