HU205565B - Beating mill with radial adjustable sieve mantle - Google Patents

Abstract

It was created a hammer mill, which is preferably used for crushing Koernerfruechten, langfasrigem and gehaeckseltem roughage, CCM and other products of the agriculture and food industry, and forms a Mahlspalt between the striking tools and the enclosing them Siebmantel by the difference of their radii. The size of the grinding gap depends on the quality of the finished product and the specific energy requirement. The process-related wear of Schlaeger can not be compensated in known hammer mill, so that an energetically optimal driving is only possible for a short time. Due to the adjustability of the sieve sheath in the radial direction an optimal operation over a longer period of time is guaranteed. We achieve a better energy economy and consistent quality of finished products. Auszerdem an adjustment of the grinding gap to the crushing of the feed material is possible. Fig. 1 {hammer mill; Comminution device; screen plates; screen jacket; screen support; grinding gap; Adjusting device for grinding gap}

Description

The present invention relates to the construction of a hammer mill with a radially adjustable screen, which is suitable for crushing grain crops, long fiber and chopped raw feed, Cob-Com-Mix (CCM) and other products in the agriculture and food industry.

Hammer mills are known which consist of a rotor and beating heads suspended therein, in which the beating ring is substantially enclosed by the screen, thereby forming a grinding space. Such hammer mills can be fed centrally from the top, radially from above, and partially axially at the height of the rotor axis for high power types.

There is a defined gap between the beating circle and the dragonfly, which is the difference between the two rays. During the operation of the hammer mill, the gap size is altered by the wear of the hammerheads.

The optimum size of the gap depends on the mesh punch and the comminuted product. Currently known machines with a constant gap size are built such that after a short run-in time, the machine operates in the optimum range and, after more severe wear of the impact heads, product quality and specific energy consumption increase, with relatively little wear on the impact heads. it is necessary to change the direction of rotation of the rotor or to replace the punches. In addition, the working gap size cannot be adapted to the specific features of the product.

Therefore, the known hammer mills work only for a short period of time and only with a very limited number of articles, working on the optimum gap between the barrel and the screen.

It is therefore an object of the present invention to provide a hammer mill in which a radially adjustable mesh jacket can be adjusted within a range of about 50% of the circumference of the rotor and the mesh jacket. Due to the constant curvature of the screen, it is not possible to set a constant gap around the circumference. Since the most intensive milling takes place in the area below the rotor axis, the gap is sufficiently uniform there. This makes it possible, within certain limits, to fit the gap between the beater heads and the screen coat to the type of product and to partially compensate for the wear of the beater heads.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a hammer mill in which the screen is adjustable radially relative to the axis of the rotor. At the same time, when moving the mantle, the two halves of the screen must rotate in the direction of the rotor when moving inwardly towards the rotor, so that a relatively constant gap can be formed, particularly in the lower section of the two halves of the screen.

According to the invention, the object of the present invention is that the screen jacket consists of two halves which surround the rotor and which can be displaced radially as a whole or separately. If the lower sieve holder moves in the direction of the rotor, both halves of the sieve must rotate in the direction of the rotor.

According to the invention, this is achieved by keeping the upper end of the two halves of the screen in an elongated guide hole. When the lower sieve holder is moved upwards in the direction of the rotor, the upper end of the two halves of the sieve is rotated in the direction of the rotor in accordance with the guiding in the oblong guide hole. Once the gap has been adjusted, the upper ends of the two sides of the screen are fixed to avoid vibrations. The design of the two sides of the sieve can be varied. Strong bars can be made directly movable. Thin plates can be supported by a frame and a wire. In this case, the sieves can be moved by means of a frame or sieve wire. In addition, the dragonfly can be divided into two parts of different sizes. The movement is infinitely variable, with the lower screen holder sitting in a wire and adjustable by means of a spindle or an eccentric.

A stop is arranged in the structure which prevents the sieve from entering the sphere of the new impact heads. The invention will now be described in more detail by way of an exemplary embodiment, in which: FIG

Figure 1 is a cross-sectional view of a hammer mill; the

Figure 2 is a sectional view A-A of the mill of Figure 1; the

Figure 3 is a sectional view B-B of the mill of Figure 1; the

Fig. 4 is a sectional view of a hammer mill in which a sieve plate and a sieve frame are drawn.

Figure 1 shows that the screen coat (2) surrounds the grinding space (3) by about 75%. Two halves of the screen are pivotally mounted on the pins (12) in the lower screen holders (5). The pins (12) are axially movable by means of a lever and facilitate rapid replacement of the screen (see Fig. 2). The sieve is made of a sieve plate which is thicker than 3 mm, which makes it unnecessary to use a sieve frame.

One (4) tab is attached to the ends of the two halves of the screen. The tab (4) has a pin (12) for the lower screen holder (5), whereby the screen is secured radially and axially.

The left half of the sieve is shown in the starting position and the right half is in the stopped position.

The upper end of the screen also has tabs (4) secured with a hole. A bolt with a threaded end (6) extends from the inside out through the hole (4) of the tab (4) and the elongated guide hole (8) in the side wall (9). The nut threaded to the end of the threaded pin (6) is used to secure the upper end of the screen (Fig. 3). The lower screen holder (5) sits in a wire consisting of two guide pins. Radial adjustment of the lower screen holder (5) is effected by means of a spindle (7) which is movable by the rectangular construction of its end.

To adjust, loosen the locking nuts on the upper mesh ends. As the spindle (7) is rotated, the lower screen holder (5) moves upwardly and the screen (2) rotates radially in the elongated guide hole (8). The two sides of the screen thus perform a vertical movement and a rotation.

It is also possible to have the lower screen holder (5) two

Make HU pieces and adjust the two halves of the sieve separately. It is also possible for the screen cloth (2) to be made of two or more pieces of mesh of different sizes. The screen pieces are adjusted radially in the screen holder. Fig. 4 shows two half-mesh screens made of a thin screen of silk and lying on a screen frame (10) with an inner conductor (11) pressed against it. This unit itself can rotate in the lower screen holder (5). The conversion proceeds in a similar manner to that described in Figure 1.

Claims (3)

A hammer mill with radially adjustable screen for shredding, preferably grain crops, long-grain or pre-chopped raw feeds, a combined ga565 B 2 feed mix and other agricultural and food products having a hinged rotor having: the screen cloth (2) surrounding the rotor (1) forming the grinding space (3) consists of two halves and that each half of the screen is pivotally mounted in a radially adjustable lower sieve holder (5) and in its upper ends (4). ) are guided by elongated guide holes (8) in the side walls (9) by means of threaded end pins (6). A hammer mill according to claim 1, characterized in that the lower screen holder (5) consists of two independently movable parts, which are assigned to one half of the screen. A hammer mill according to claim 1, characterized in that the screen cloth (2) consists of two or more screen pieces of different sizes.