Products Плуги навесные дисковые Lift-type disk plough PND


Lift-type disk plough PND

The lift-type disc plough is designed for tillage to a depth of 25 ... 30 cm of solid dry, dry solid fritting soils prone to lump formation and soils clogged with wood residues, as well as soils with the presence of tree roots.

It can be used for the treatment of over-moistened virgin, long-unused and heavy soils, that have a heavy mechanical composition, soils with a compact structure with a resistivity of up to 1.3 kg/cm2., repeated ploughing of uprooted forest plots, sealing up of siderates.

 

    The plough design allows to perform the deep tillage under conditions of high moisture within strictly limited areas (including small-sized ones), which are provided with the irrigation systems. The plough small overall dimensions and mounted design allow to perform the soil handling and the plough transportation to various areas while avoiding the engineering or irrigation systems.

   The plough PND is to be ganged up with the tractors of drawbar category 1.4 (Belarus 520 for the ploughs PND-2 and PND-3; Belarus 820 for all other ploughs) using the mounting device NU-2.

   To increase the utilisation factor of the tractor draft force, the plough can be equipped with an additional leg with disk, which is to be installed onto the provide bracket on the plough frame.

   JSC "Bobruiskselmash" produces 4 modifications of a disk plough : having two, three, four and five plowshares.

 

Principle of operation.

While the tractor moves, each disk tool of the plough, while progressively moving with the tractor and rotating around own axis, undercuts some layer of soil, breaks it up and discharges into the furrow.

 Perform works in the field according to the conventional ploughing method.

 

Advantages of disk plough.

Of course, the share plough is more popular among modern farmers. However, his disk colleague is simply indispensable for certain types of soil and for performing certain types of work. For example, a disk plough is always used for ploughing new fields, especially on the site of uprooted forests, processing of stony, heavy soils, on irrigated lands, on water-logged and dry heavy soils of swampy terrain, land heavily clogged with wild plants, weeds, and elsewhere, where the use of a conventional plough is impossible.

The point is that if the blade grader encounters a serious obstacle during the ploughing process it gets stuck or breaks, and the disk plow will roll over it without any damage. This makes it possible to widely use disk ploughs in forestry. In agriculture disk ploughs are used for stubble ploughing - it copes with this operation better than its moldboard colleague.

Seedbed preparation for thick-stalked cultures is also better performed by a disk type aggregate. It copes better with the destruction of weeds and stubble remains. In addition, if the soil is very dry, after this plough, in contrast to the share plough, there are fewer unbroken earthen lumps. Thus, the usage of disk ploughs is justified on eroded soils and during the processing of the soil before planting rice. Most often, these tools are used to treat reclaimed soils in which the remains of woody plants and brushwoods occur.

THE PLOUGH DESCRIPTION AND PRINCIPLE OF OPERATION

The plough composition.

 Main items of the plough are shown in Fig. 1 (General view of the plough PND).

   Note: depending on the plough modification the plough general view will differ by the number of legs with disk-shaped tools, the fame and plough overall dimensions.

    The plough is composed of frame 1, cross-member 10, leg 4, rear leg 5, furrow wheel 3, hub 11 to which the disk 2 is attached, the furrow wheel is installed on the lever 7 and fastened to the rear leg by the bar 6 and support 8.

The plough frame (Fig. 2) is the welded construction, made of beams with cross-section of 100 х 100 mm. The central beam 4 has holes for legs installation. The brackets 7 are welded to the front part for the cross-beam installation. The plate 8 is welded to the rear part for additional leg installation in order to modify the plough into 4-leg version.

 The three-point linkage of the plough is intended for connection to the tractor's hitch. The cross-beam 5 is pivotally fastened to the frame, which allows to change the plough width. The bracket 9 is intended for connection to the central bar of the tractor's hitch.

The legs (Fig. 3) are made of welded roll-formed channels, which are provided with holes A for fastening of the axis with the lever for hub and for the disk tilt angle, which allow to set the tilt angle 12º; 15º; 18º. There are holes B in the leg upper plate, which allow to set the disk angle 39º; 42º; 45º.

In contrast to legs, the rear leg (Fig. 4) is provided with the axis 2 for installation of the furrow wheel and brackets 1 for the furrow wheel's rod fastening.

The disk tool (Fig. 5) is the concave disk 1 made of manganese steel and hardened to 44 НRС, fastened by the bolts 7, nut 8 and washer 9 to the flange 2 of the hub 3, which rotates on conical bearings 5 of the axis 4. The axis 4 is welded to the lever 6, by which the tool is fastened to the leg through holes A.

 To protect the bearings from dirt ingress, the front part of the hub is equipped with the cover 13 with the rubber ring 14, the rear part of bearings is protected by the sealing ring 11, which is installed into the housing 12.

 The bearings are adjustable by nuts 15 with the retaining washer 16.

The bearings are to be lubricated through the grease cup 17.

     The furrow wheel (Fig. 6) is intended to enhance the disk tool operation when the plough is used on the firm soil, and for the plough operation stability in terms of tillage width and depth. The furrow wheel's tilt angle and distance to the furrow wall are changeable.