CS206731B1 - Blowing conduit for field chaff cutters - Google Patents

Abstract

The discharge pipe is designed for use in a field chopper. It is mounted behind the chopping mechanism and it consists of a standpipe, a rotary blower, and an outlet pipe connected to the blower. The standpipe and the outlet pipe directing the material are both connected tangentially to the housing of the rotary blower, whose axis is horizontal. The design gives an appreciable economy of power, and a min amount of kinetic energy in the material being wasted.

Description

The invention relates to an exhaust pipe for a forage harvester.

In conventional forage harvesters, an exhaust pipe is usually provided with a channel and a terminal. It is usually rotatable about a vertical axis and equipped with a flap for height regulation of the cut material. Cut material comes from the cutting device, which is associated with the conveying device, into the exhaust pipe, by the ejector vanes, whereby the material receives energy for conveying through the exhaust pipe and further to the intended conveying means. However, since the cutting device is constructed as a whole with a conveyor device, it is often a compromise between cutting and conveying, which is not advantageous for either one or the other working process. It is often necessary to use additional trimming which, if it is formed by a passive device, such as a cutting grid, itself consumes a considerable part of the energy given to the material by the cutting device, and for further transport it is necessary to use another energy intensive device, e.g. Other conveying devices, such as screw conveyors, are also interposed between the cutting device and the sweeper to ensure a smooth transition of the material being processed. However, even with forage harvesters equipped with a sweeper, the transport problem is often not satisfactorily resolved, since the material loses a considerable part of its speed when rubbed against the exhaust pipe bend. Since a certain minimum material velocity is absolutely necessary when leaving the exhaust tailpipe to transport the material by air into the vehicle, it is necessary that the material input speed to the exhaust

206 731 piping is considerably higher due to friction losses · This naturally results in considerable energy source and fuel consumption requirements for both self-propelled and trailed forage harvesters.

Although a device is known in which the chopper is arranged directly in the exhaust pipe, the axis of rotation of the chopper is vertical or oblique. The spreader itself is located behind the riser and in front of the adjustable baffle with a ejector tip. Although this device will supply the material with the additional energy necessary to leave the terminal and reach the vehicle, the material itself, coming through the riser, must change direction significantly and make a considerable distance in the sweeper itself. In this way, a large part of the energy of the incoming material is lost and must be given sufficient energy again.

These disadvantages are overcome by the exhaust pipe for the forage harvester according to the invention, which consists in that a riser pipe is tangentially connected to the periphery of the rotary sweeper with a horizontal axis of rotation and a tangentially guided discharge pipe at the top.

The exhaust pipe for the forage harvester of the present invention achieves considerable energy savings while providing very good conveying quality of the cut material. Since the conveying speed given to the material is sufficient, the cutting process itself can also be optimal and with very good work quality. The energy requirements of the arrangement according to the invention are minimal, the material describes only a short path in the sweeper and is given virtually without loss of input energy the additional kinetic energy required for the required conveying speed and path.

The accompanying drawings show schematically an embodiment of an exhaust pipe for a forage harvester according to the invention, in which Fig. 1 is a plan view of an exhaust pipe harvester with an exhaust pipe and Fig. 2 is a side view of Fig. 1.

The forage harvester 11, eg self-propelled, is provided behind the mowing device (not shown) with an inserter 1, eg a drum. Behind it is a cutting device 2, e.g. a drum, provided with cutting knives. A fixed counter blade is provided at the circumference of the cutting knife path. The outlet opening ^{2 of the} cutting device 2 is connected to a rising exhaust pipe 6 _t which is tangentially connected to a rotary sweeper 2, whose axis of rotation 12 is arranged horizontally.

The drive of the spreader 7 is effected by a motor 10, e.g. a hydraulic motor mounted either outside the axis of rotation 12 or directly in the axis of rotation 12 (not shown). The baffle 8 is then tangentially connected to the baffle 8, supported by the baffle 9.

The exhaust pipe for the forage harvester according to the invention operates as follows: The harvested material is fed by the inserter 1 into the cutting device 2, where it is cut by the cutting blades in cooperation with the counterblade 4 and given kinetic energy with which it leaves the cutting device 2 piping 6 through which it tangentially reaches the rotary sweeper 6. This gives him additional kinetic energy over a short distance over a portion of his perimeter and the material, at increased speed, exits the space of the mower. Through the deflection line 8, it reaches the deflector end which necessarily directs it to the right means of transport (not shown) for the correct range.

Claims (1)

. OBJECT OF THE INVENTION An exhaust pipe for a forage harvester, equipped with a cutting device, behind which is a riser, followed by a rotary sweeper and a discharge pipe, characterized in that the circumference of the rotary sweeper (7) with the horizontal axis of rotation (12) is the riser pipe (6) and at the top also the tangentially guided discharge pipe (8).