DK152338B

DK152338B - hammer mill

Info

Publication number: DK152338B
Application number: DK518085A
Authority: DK
Inventors: Hans Peter Plomgaard
Original assignee: Maskinfabrikken Skiold Saeby A
Priority date: 1985-11-11
Filing date: 1985-11-11
Publication date: 1988-02-22
Also published as: DK518085A; DK518085D0; DE3636869A1

Description

Opfindelsen angår en slaglemølle af den i patentkravets indledning angivne art.BACKGROUND OF THE INVENTION This invention relates to a mower mill of the kind set forth in the preamble of the claim.

Ued kendte møller af denne art har det vist sig, at der under brugen fremkommer en ret stor støvdannelse samt opbygning af et overtryk i melkassen. Herved presses en vis støvmængde ~ malet materiale - ud gennem utætheder i melkassen til gene for omgivelserne. Samtidig bevirker o-vertrykket, at melkassen ikke kan fyldes helt, før slagle-møllen holder op med at male. Der vil således opstå et hulrum i melkassen af form som en omvendt kegle med samme akse som den lodrette akse, når formalingen er ophørt, fordi melkassen har nået sin maksimale fyldningsgrad.From unknown mills of this kind, it has been found that during use a fairly large dust formation and the build-up of an overpressure in the milk box. Hereby a certain amount of dust - painted material - is squeezed out through leaks in the milk box to the detriment of the surroundings. At the same time, the o-pressure means that the milk box cannot be filled completely until the slaughter mill stops painting. Thus, a void in the milk box will form in the form of an inverted cone with the same axis as the vertical axis when the grinding has ceased, because the milk box has reached its maximum degree of filling.

Opfindelsen har til formål at forbedre den indledningsvis angivne slaglemølle således, at man undgår støvdannelse i dens omgivelser og opnår en bedre fyldningsgrad, så melkassen kan rumme mere finmalet materiale, før det er nødvendigt at tømme den samt at formalingen automatisk ophører, når fyldningsgraden er næsten 100%.The invention aims to improve the abrasive mill initially specified so as to avoid dust formation in its surroundings and obtain a better filling degree so that the milk box can accommodate more finely ground material before it is necessary to empty it and that the milling automatically ceases when the filling degree is almost 100%.

Dette formål opnås ifølge opfindelsen ved at den indlednings angivne slaglemølle er ejendommelig ved det i patentkravets kendetegnende del angivne.This object is achieved according to the invention in that the abrasive mill specified in the preamble is characterized by the characterizing part of the claim.

Som følge af den ifølge opfindelsen foreslåede åbning i bunden af malekammeret trækkes der luft og støv fra melkassen ind i malekammeret gennem åbningen, idet der ved slagleroto-rens rotation opstår et undertryk omkring centrum. Herved opnås en recirkulation af luft- og støvmængde, således at støvmængden holdes i luftstrømmen, og man opnår en for omgivelserne støv fri formaling uden anvendelse af filterarrangementer med deraf følgende gener. Samtidig har det vist sig, at melkassen kan fyldes næsten 100%, før formalingen ophører samt at formalingen automatisk ophører i form af, at det u-formalede materiale forhindres i at løbe ind i malekammeret, af den her kraftig recirkulerende luftstrøm. Formalingens ophør registreres yderligere ved, at strømforbruget for den motor, som driver slaglerotoren, falder til tomgangsforbruget.As a result of the aperture proposed in the invention at the bottom of the grinding chamber, air and dust from the milk box are drawn into the grinding chamber through the aperture, as a result of the rotation of the pothole rotor, a negative pressure is created around the center. This results in a recirculation of the amount of air and dust so that the amount of dust is kept in the air flow and a dust-free grinding is obtained for the surroundings without the use of filter arrangements with the resulting genes. At the same time, it has been found that the milk box can be filled almost 100% before the grinding ceases and that the grinding automatically ceases in the form of the non-milled material being prevented from entering the painting chamber by this powerful recirculating air flow. The cessation of grinding is further recorded by the power consumption of the motor operating the impeller rotating to idle consumption.

Hvis åbningens areal er for lille i forhold til en slag-lemølle af en forud fastlagt størrelse, vil lufthastigheden gennem åbningen være så stor, at en for stor del af støvmængden føres med luftstrømmen.If the area of the aperture is too small in relation to a mop of a predetermined size, the air velocity through the aperture will be so large that an excessive amount of dust is fed with the air flow.

Åbningen skal have en vis størrelse i forhold til de øvrige dimensioner. Når man gør åbningen større, falder lufthastigheden, og dermed falder den med luften transporterede støvmængde, men den gennem åbningen transporterede luftmængde ændrer sig næsten ikke.The opening must have a certain size in relation to the other dimensions. As the aperture is increased, the air velocity decreases, and thus the amount of dust transported through the air decreases, but the air volume transported through the aperture hardly changes.

Opfindelsen skal i det følgende nærmere beskrives med henvisning til tegningen, der i skematisk form viser en slagle-mølle med den ifølge opfindelsen angivne åbning i malekam-merets bund.BRIEF DESCRIPTION OF THE DRAWINGS The invention will now be described in more detail with reference to the drawing, which shows in a schematic form a slag mill with the aperture according to the invention in the bottom of the painting chamber.

På tegningen ses en melkasse 1, hvori der foroven er fastgjort et malekammer 2 i melkassens 1 overside 3.The drawing shows a milk box 1, in which is attached a painting chamber 2 at the top 3 of the milk box 1.

På oversiden 4 af malekammeret 2 er fastgjort en motor 5, hvis aksel 6 er ført gennem malekammerets 2 overside 4 og driver en slaglerotor 7, som derved roterer indenfor et cirkulært cylindrisk sold 8.On the upper side 4 of the painting chamber 2 is mounted a motor 5, the shaft 6 of which is passed through the upper side 4 of the painting chamber 2 and drives a paddle rotor 7, which thereby rotates within a circular cylindrical shaft 8.

Over en åbning 9 i oversiden 4 af malekammeret 2 er der desuden fastgjort et fødeapparat 10 i form af en tragt til indføring af korn eller andet materiale, der skal males.In addition, above an opening 9 in the upper side 4 of the grinding chamber 2, a feeding apparatus 10 in the form of a hopper for introducing grain or other material to be painted is attached.

Under formalingen indføres kornet i tragten 10 i malekammeret, og det malede korn 11 føres gennem soldet 8 ned i melkassen 1.During grinding, the grain is introduced into the hopper 10 into the grinding chamber and the milled grain 11 is passed through the sieve 8 into the milk box 1.

I bunden 12 af malekammeret 2 findes en cirkulær åbning 13, som er koncentrisk med slaglerotorens 7 lodrette rotationsakse. Som vist med pile fremkommer der som følge af slaglerotorens 7 rotation en cirkulerende luftstrøm, som bevirker en bedre fyldning af melkassen 1, før denne er så fuld, at den skal tømmes gennem en ikke vist lem i melkassen 1.At the bottom 12 of the painting chamber 2 is a circular opening 13 which is concentric to the vertical axis of rotation of the paddle rotor 7. As shown by arrows, due to the rotation of the pusher rotor 7, a circulating air flow results in a better filling of the milk box 1 before it is so full that it must be emptied through a limb not shown in the milk box 1.

Samtidig holder luftstrømmen melstøvet væk fra utætheder i melkassens 1 vægge, så melstøvet ikke trænger ud gennem sådanne utætheder i melkassen 1.At the same time, the air flow keeps the flour dust away from leaks in the walls of the milk box 1, so that the flour dust does not penetrate through such leaks in the milk box 1.

Beskrivelsen er rettet på en slaglemølle, men opfindelsen kan også anvendes i en knivmølle.The description is directed to a slaughter mill, but the invention can also be used in a knife mill.

UdførelseseksempelEmbodiment

Der blev udført forsøg med en slaglemølle ifølge opfindelsen, som havde et malekammer 2 begrænset af et cylindrisk sold 8 med en diameter på 518 mm og en højde på 75 mm og med en huldiameter i soldet på 3 mm. Åbningen 13 i male-kammerets bund var 72 mm i diameter.Experiments were carried out with a slaughter mill according to the invention, which had a grinding chamber 2 limited by a cylindrical screen 8 with a diameter of 518 mm and a height of 75 mm and with a hole diameter in the sieve of 3 mm. The opening 13 in the bottom of the paint chamber was 72 mm in diameter.

Med denne slaglemølle blev forsøgene udført med lagerfast, velrenset byg. Slaglemøllens kapacitet blev i afhængighed af den anvendte motorstørrelse målt som følger: 4 HK kapacitet 260 kg/time 5.5 HK kapacitet 410 kg/time 7.5 HK kapacitet 495 kg/time 10 HK kapacitet 525 kg/timeWith this slag mill the experiments were carried out with stock-proof, well-cleaned barley. Depending on the engine size used, the capacity of the slag mill was measured as follows: 4 HP capacity 260 kg / hour 5.5 HP capacity 410 kg / hour 7.5 HP capacity 495 kg / hour 10 HP capacity 525 kg / hour

Claims

Patent Claims Slag mill for grinding or comminuting grain, kernel fruit or similar material supplied from a feeder (10) mounted on the top of the slag mill, which opens into a painting chamber (2) limited by a circular cylindrical screen (8) with vertical axis , a fixed bottom (12) and a lid (4) with aperture (9) for the feeder (10), said grinding chamber (2) containing a rotary paddle rotor (7) rotating about the vertical axis and mounted in a milk box (1) for collecting the painted material, characterized in that the bottom (12) of the painting chamber (2) has an opening (13) in the area around the vertical axis (6).