HRP990322A2

HRP990322A2 - Impeller or blower-impeller mill

Info

Publication number: HRP990322A2
Authority: HR
Inventors: Werner Bischoff; Klaus Czechaczek
Original assignee: Babcock Kraftwerkstech Gmbh
Priority date: 1998-10-16
Filing date: 1999-10-15
Publication date: 2000-10-31
Also published as: AU747834B2; YU51499A; EP0997195A1; TR199902581A2; DE19847772B4; TR199902581A3; YU51399A; DE19847772A1; AU5015399A

Description

Izum se odnosi na mlatilicu ili mlatilicu s puhalom, kako je dano u preambuli zahtjeva 1. The invention relates to a flail or flail with a blower, as given in the preamble of claim 1.

Mlatilica s puhalom služi za mljevenje smeđeg ugljena, pri čemu rotor s batovima zajedno s zupčanikom puhala koji je postavljen na istu osovinu, vrši usitnjavanje. The blower flail is used for grinding brown coal, where the rotor with pistons together with the blower gear, which is mounted on the same shaft, performs the crushing.

Iz publikacije "Tehnika prerade 13 (1972), strane 217-225, 305-312" poznata je mlatilica koja ima batove, čiji krakovi zajedno sa simetričnom glavom bata koja se može jedanput okrenuti, imaju zaštitu od habanja. Ta zaštita od habanja sastoji se od jedne ploče 26, koja na jednom dijelu duljine pokriva u pravcu okretanja mlina prednju stranu kraka bata. Kod jačeg habanja ta zaštita od habanja nije dostatna. From the publication "Technical processing 13 (1972), pages 217-225, 305-312" is known a flail that has pistons, the arms of which, together with the symmetrical head of the piston that can be turned once, have wear protection. This protection against wear consists of one plate 26, which on one part of the length covers the front side of the piston arm in the direction of rotation of the mill. In case of heavy wear, this wear protection is not sufficient.

Iz DE-OS 26 58 469 poznata je mlatilica s puhalom, kod koje je osovina mlina na razmaku obložena sa zaštitnom cijevi osovine, da bi se na grebenu osovine izbjegle visoke temperature. Zaštitna cijev osovine može se sastojati od neprekinutog plašta ili može biti sastavljena od pojedinačnih dijelova cijevi. Na njoj se nalaze otvori za provlačenje batova koji su pričvršćeni na osovini mlina. Kod demontaže batova mora se prvo maknuti zaštitna cijev osovine, da bi se nakon rastavljanja svornjaka glavine 23, mogli rastaviti batovi. From DE-OS 26 58 469, a threshing machine with a blower is known, in which the mill shaft is covered with a protective shaft tube in order to avoid high temperatures on the ridge of the shaft. The shaft protection tube can consist of a continuous jacket or it can be made up of individual tube parts. It has holes for passing the pistons which are attached to the shaft of the mill. When disassembling the pistons, the protective shaft tube must first be removed, so that after disassembling the hub bolt 23, the pistons can be disassembled.

Izum se temelji na zadatku, da se navedeni mlin oblikuje tako, da su krakovi batova uveliko zaštićeni od habanja. The invention is based on the task of designing the said mill in such a way that the arms of the pistons are largely protected from wear.

Taj zadatak se kod mlina navedene vrste prema izumu rješava karakterističnim obilježjima zahtjeva 1. Povoljni oblici izuma su predmet podzahtjeva. According to the invention, this task is solved with the mill of the mentioned type by the characteristic features of claim 1. Advantageous forms of the invention are the subject of subclaims.

Kod mlina prema izumu se zaštita od habanja proteže čitavom duljinom kraka bata, na stranama koje su posebno izložene habanju. To je strana unutar mlina na koju dolazi meljava, kao i u pravcu okretanja mlina prednja strana kraka bata. In the mill according to the invention, the wear protection extends along the entire length of the piston arm, on the sides that are particularly exposed to wear. It is the side inside the mill on which the grind comes, as well as the front side of the piston arm in the direction of rotation of the mill.

Jedan primjer izvedbe prema izumu prikazan je na crtežima i u daljnjem tekstu će biti detaljnije objašnjen. Slike pokazuju: One example of the embodiment according to the invention is shown in the drawings and will be explained in more detail in the following text. The pictures show:

Slika 1 uzdužni presjek kroz mlatilicu s puhalom, Figure 1 longitudinal section through a flail with blower,

Slika 2 pojedinost Z prema slici 1, Figure 2 detail Z according to Figure 1,

Slika 3 djelomično u presjeku bokocrt uz sliku 2 i Figure 3 partially in cross-section side view with Figure 2 i

Slika 4 presjek IV - IV prema slici 3. Figure 4 section IV - IV according to Figure 3.

Prikazana mlatilica s puhalom sadrži rotor koji se okreće u kućištu 1. Rotor se sastoji od osovine 2 i pokreće ga motor 3 preko prigona, a uležišten je u ležajima 4, 5 koji se nalaze izvan kućišta 1. Na osovinu 2 postavljen je jedan dio batova 6 sa batovima koji su postavljeni u više redova, kao i zupčanik puhala 8 s radijalnim lopaticama 9. The shown flail with a blower contains a rotor that rotates in the housing 1. The rotor consists of a shaft 2 and is driven by a motor 3 via a drive, and is seated in bearings 4, 5 located outside the housing 1. One part of the pistons is placed on the shaft 2 6 with pistons that are placed in several rows, as well as the blower gear 8 with radial vanes 9.

Zupčanik puhala 8 koji djeluje kao ventilator, usisava kroz neprikazano usisno okno vruće dimne plinove iz ložišta jednog također neprikazanog kotla. Meljava, u konkretnom slučaju sirovi smeđi ugljen, stavi se u usisno okno i dolazi zajedno s vrućim dimnim plinovima kroz ulaz 10 koji se priključuje na usisno okno, u mlin. Meljava i dimni plin teku u pravcu strelice 11 kroz dio bata 6 mlina, gdje se vrši predusitnjavanje. Završno usitnjavanje vrši se u zupčaniku puhala 8. Usitnjena meljava se u pravcu strelice 12 kroz prijelazni element 13 i vod za prašinu koji se na taj element priključuje, dovodi do neprikazanih plamenika kotla. The blower gear 8, which acts as a fan, sucks hot flue gases from the combustion chamber of a boiler, also not shown, through a suction shaft (not shown). Grinding, in this case raw brown coal, is placed in the suction shaft and comes together with hot flue gases through inlet 10, which is connected to the suction shaft, into the mill. Grinding and flue gas flow in the direction of the arrow 11 through the part of the piston 6 of the mill, where pre-pulverization takes place. The final shredding is done in the blower gear 8. The shredded is ground in the direction of the arrow 12 through the transitional element 13 and the dust line that is connected to that element, leads to the boiler burners (not shown).

Kod mlatilice otpada zupčanik puhala. The blower gear falls off with the flail.

Osovina 2 mlina se u unutrašnjosti hladi vodom. U tijelu osovine 2 nalaze se prstenasti utori 14, tako da su oblikovani prsteni u glavini 15. Na razmaku od prednje strane prstena u glavini 15, osovina 2 obložena je zaštitnom cijevi 16. Kroz raspor 17 koji se pri tome oblikuje, struji hladan zrak. Shaft 2 of the mill is internally cooled by water. There are annular grooves 14 in the body of the shaft 2, so that the rings are formed in the hub 15. At a distance from the front of the ring in the hub 15, the shaft 2 is coated with a protective tube 16. Cold air flows through the gap 17 that is formed in the process.

Svaki bat 7 sastoji se od kraka bata 18, na čijem slobodnom kraku je pomoću svornjaka 20 njihajuće pričvršćena glava bata 19. Svornjak 20 je u promjeru stepenasto oblikovan i provučen kroz odgovarajuće oblikovane provrte u glavi bata 19 i u kraku bata 18. Na odtočnoj strani glave bata 19 je na svornjaku 20 navaren četverobridni element 21, kao osiguranje od ispadanja. Each piston 7 consists of a piston arm 18, on the free arm of which the piston head 19 is oscillatingly attached by means of a pin 20. The pin 20 is stepped in diameter and passed through correspondingly shaped holes in the piston head 19 and in the piston arm 18. On the outlet side of the head the ram 19 has a four-edged element 21 welded to the bolt 20, as an insurance against falling out.

Bat 7 ima podnožje 22, koje je umetnuto u prstenasti utor 14 između dva prstena u glavini 15. Batovi 7 se u osovini 2 drže svornjacima glavine 23, koji su pomoću provrta koji su izravnati jedni s drugima, provučeni kroz prstene s utorima 15 i podnožja 22 batova 7. Zaštitna cijev 16 ima proreze 24, a kroz svaki strši po jedan krak bata 18. Širina kraka bata 18 koji prolazi kroz prorez 24, odgovara najvećoj širini kraka bata 18, uključivši širinu podnožja 22. Na taj način mogu se nakon rastavljanja svornjaka glavine 23, batovi 7 skinuti sa osovine, bez da se mora odstraniti zaštitna cijev 16. The piston 7 has a base 22, which is inserted into an annular groove 14 between two rings in the hub 15. The pistons 7 are held in the shaft 2 by the bolts of the hub 23, which are pushed through the rings with grooves 15 and the base by means of bores that are aligned with each other 22 pistons 7. The protective tube 16 has slots 24, and through each of them one arm of the piston 18 protrudes. The width of the arm of the piston 18 that passes through the slot 24 corresponds to the largest width of the arm of the piston 18, including the width of the base 22. In this way, after disassembly, they can of the hub bolt 23, remove the pistons 7 from the shaft, without having to remove the protective tube 16.

Krakovi batova 7 su sa zaštitnim elementom 25 zaštićeni protiv habanja. Taj zaštitni element 25 sastoji se od jedne ploče 26, koja može biti savinuta pod kutom. Ploča 26 prianja uz stranu kraka bata 18, na koju prema strelici 11, dolazi meljava. Pod kutom savijeni krak 27 ploče 26 prekriva u pravcu okretanja osovine prednju stranu kraka bata 18. Ploča 26 sa pod kutom savinutim krakovima 27 proteže se preko čitave duljine kraka bata 18. Na gornjem kraju prekrivena je jednim elementom 28 koji je priljeven na glavu bata 19. Na donjem kraju ulazi zaštitni element 25 u prorez 24 zaštitne cijevi 16, kroz koji prolazi i krak bata 18, te ga tako prekriva zaštitna cijev 16. The arms of the pistons 7 are protected against wear with the protective element 25. This protective element 25 consists of one plate 26, which can be bent at an angle. The plate 26 adheres to the side of the arm of the piston 18, on which, according to the arrow 11, the grind comes. The angled arm 27 of the plate 26 covers the front side of the piston arm 18 in the direction of rotation of the shaft. The plate 26 with the angled arms 27 extends over the entire length of the piston arm 18. At the upper end, it is covered by one element 28 which is molded onto the piston head 19 At the lower end, the protective element 25 enters the slot 24 of the protective tube 16, through which the arm of the piston 18 also passes, thus being covered by the protective tube 16.

Zaštitni element 25 je rastavljivo spojen s krakom bata 18. On ima dva otvora, od kojih svaki prihvaća po jedan konični stezni element 29. Stezni element 29 ima unutrašnji navoj u koji zahvaća vanjski navoj vijčanog svornjaka 30. Vijčani svornjak 30 je sa suprotne strane proveden kroz provrt u kraku bata 18. Ploča 26 zaštitnog elementa 25 postaje deblja u smjeru pod kutom savijenog kraka 27, čija debljina je veća od debljine ploče 26. The protective element 25 is releasably connected to the arm of the piston 18. It has two openings, each of which accepts a conical clamping element 29. The clamping element 29 has an internal thread that engages the external thread of the screw bolt 30. The screw bolt 30 is inserted from the opposite side through the hole in the arm of the piston 18. The plate 26 of the protective element 25 becomes thicker in the direction at the angle of the bent arm 27, the thickness of which is greater than the thickness of the plate 26.

Claims

1. A flail or flail with a blower, which consists of a shaft (2) that rotates in a housing, into which the hub rings (15) are cut, between which the pistons (7) are held, consisting of one piston arm each ( 18), whose free end has a ram head (19) and which has a protective element (25) consisting of one plate (26) on the inflow side of the mill, indicated by the fact that the protective element (25) extends along the entire length of the side of the ram arm (18) to which it grinds and is covered at one end by a part (28) of the piston head (19), and at the other end by a protective tube (16) that surrounds the shaft (2).

2. Mill according to claim 1, characterized by the fact that the protective element (25) is bent at an angle and that the angled arm (27) of the protective element (25) engages over the side of the piston arm (18) that is turned in the direction of rotation of the shaft ( 2).

3. Mill according to claim 1 or 2, characterized by the fact that the clamping element (29) passes through the protective element (25), on which there is an internal thread into which the screw bolt (30) engages, which passes through the piston arm (18) from the outlet the sides are ground.

4. A mill according to claims 1 to 3, characterized in that the arm of the piston (18) passes through the slot (24) of the protective tube (16) surrounding the shaft (2) and that the width of the arm of the piston (18) corresponds to the width of the part of the arm of the piston (18) ) that passes through the slot (24).