NO865330L

NO865330L - CUTTER RING FOR TUNNEL AND SHAK DRILLING IN MOUNTAIN.

Info

Publication number: NO865330L
Application number: NO865330A
Authority: NO
Inventors: Stein Narvestad
Original assignee: Narvestad A S Stein
Priority date: 1986-12-30
Filing date: 1986-12-30
Publication date: 1988-07-01
Also published as: AU1083888A; WO1988005117A1

Description

Oppfinnelsen angår en kutterring for tunnel- og sjaktboring i fjell. The invention relates to a cutter ring for tunnel and shaft drilling in rocks.

Ved tunnel- og sjaktboring i fjell benyttes i stigende grad store tunnelboremaskiner eller helprofilmaskiner. Disse maskiner har frittløpende kutterringer anordnet fordelt over skjærhodets flate, hvor hver kutterring er opplagret roterbart i en egen opplagring og hvor kutterringenes egg kan være fremstilt av stål eller ha innsatte hardmetallstifter. When tunneling and shaft drilling in mountains, large tunnel boring machines or full profile machines are increasingly used. These machines have free-running cutter rings arranged distributed over the surface of the cutting head, where each cutter ring is stored rotatably in a separate storage and where the cutter rings' eggs can be made of steel or have inserted hard metal pins.

Ved boringsarbeider vil kuttereggene slites slik at disse må utskiftes, noe som idag medfører et langvarig arbeide da hver kutterringopplagring må frigjøres fra maskinen og deretter demonteres for utskifting eller annen behandling av selve kuttereggen. Da den tid som går med til denne utskifting er meget lang, medfører det også at de meget kostbare tunnelboremaskiner får relativt lange perioder med driftsstans før de igjen kan settes i drift. During drilling work, the cutting edges will wear so that they have to be replaced, which today entails a long-term work as each cutting ring bearing must be released from the machine and then dismantled for replacement or other treatment of the cutting edge itself. As the time required for this replacement is very long, it also means that the very expensive tunnel boring machines have relatively long periods of downtime before they can be put into operation again.

Selvom kutterringenes opplagringer også fra tid til annen må utskiftes på grunn av slitasje, må kutterringene demonteres flere ganger før behovet for utskifting av lagrene foreligger. Although the bearings of the cutter rings also have to be replaced from time to time due to wear, the cutter rings must be dismantled several times before the need to replace the bearings exists.

Med kutterringen ifølge foreliggende oppfinnelse oppnås en betydelig nedsettelse av periodene med driftsstans for utskifting av selve kutterringene ved at kutterringenes opplagringer ikke må fjernes for maskinen for å kunne innsette nye eller behandlede kutterringer. Dette oppnås med de i kravenes karakteriserende deler anførte trekk. With the cutter ring according to the present invention, a significant reduction in the periods of downtime for replacement of the cutter rings themselves is achieved by the fact that the cutter rings' bearings do not have to be removed for the machine to be able to insert new or treated cutter rings. This is achieved with the features listed in the characterizing parts of the requirements.

På tegningen viser fig. 1 et aksialsnitt gjennom en kutterringopplagring med kutterring ifølge kjent teknikk, fig. 2 viser kutterringen ifølge oppfinnelsen i et snitt tilsvarende fig. 1, i en utførelse av oppfinnelsen, fig. In the drawing, fig. 1 an axial section through a cutter ring bearing with a cutter ring according to known technology, fig. 2 shows the cutter ring according to the invention in a section corresponding to fig. 1, in an embodiment of the invention, fig.

3 viser prinsippet for kutterringen ifølge oppfinnelsen i en annen utførelse av oppfinnelsen, fig. 4 viser et aksialsnitt gjennom festeanordningen ifølge fig. 3, fig. 5 og 6 viser aksialsnitt gjennom kutterringen ifølge oppfinnelsen med festeanordningen ifølge fig. 3 for en utførelse av aksial styring av kutterringen, fig. 6 viser en ytterligere utførelse av den aksiale styring vist på fig. 5 og fig. 7 viser et diagram over inntrenging, penetrering i forhold til kuttereg- 3 shows the principle of the cutter ring according to the invention in another embodiment of the invention, fig. 4 shows an axial section through the fastening device according to fig. 3, fig. 5 and 6 show axial sections through the cutter ring according to the invention with the fastening device according to fig. 3 for an embodiment of axial control of the cutter ring, fig. 6 shows a further embodiment of the axial control shown in fig. 5 and fig. 7 shows a diagram of penetration, penetration in relation to cutter reg-

gens materiale.gen's material.

Fig. 1 viser en kjent kutterringopplagring i aksialsnitt, hvorav tydelig fremgår at hele opplagringen må demonteres for å kunne utskifte selve kutterringen. Fig. 2 viser en utførelse av kutterringen ifølge oppfinnelsen og fig. 3 viser en ytterligere utførelse av kutterringen ifølge oppfinnelsen, hvorav især fig. 3 viser at kutterringen er delt, nemlig i to halvsirkelformede deler. Ifølge oppfinnelsen kan kutterringen 1 være oppdelt også i flere deler. Fig. 1 shows a known cutter ring bearing in axial section, from which it is clear that the entire bearing must be dismantled in order to be able to replace the cutter ring itself. Fig. 2 shows an embodiment of the cutter ring according to the invention and Fig. 3 shows a further embodiment of the cutter ring according to the invention, of which in particular fig. 3 shows that the cutter ring is divided, namely into two semicircular parts. According to the invention, the cutter ring 1 can also be divided into several parts.

Ved utførelsen på fig. 2 har kutterringens 1 rotparti 2 svalehaleform, overensstemmende med et spor 3 i kutterringens rotasjonslegeme 3. Sporet 3 dannes av selve rotasjonslegemet i en side og i den annen side av en mutter 4 som med gjenger er skrudd på rotasjonslegemet 5. In the embodiment in fig. 2, the root part 2 of the cutter ring 1 has a dovetail shape, corresponding to a groove 3 in the rotary body 3 of the cutter ring. The groove 3 is formed by the rotary body itself on one side and on the other side by a nut 4 which is screwed onto the rotary body 5 with threads.

Når mutteren 4 skrues av rotasjonslegemet 5 vil sporet 3 utvides så meget at kutterringens 1 to segmenter kan fjernes radialt og nye kutterringsegmenter innsettes, hvoretter mutteren 4 skrus til og strammes på egnet måte for å sikre kutterringen 1 i sporet 3 ved at kutterringens 1 rotparti 2 låses i sporet 3. When the nut 4 is unscrewed by the rotary body 5, the groove 3 will expand so much that the two segments of the cutter ring 1 can be removed radially and new cutter ring segments inserted, after which the nut 4 is screwed on and tightened in a suitable way to secure the cutter ring 1 in the groove 3 by the cutter ring 1 root part 2 locked in slot 3.

Fig. 3 viser et tverrsnitt av en annen utførelse av feste for kutterringens to segmenter. Her danner de to kutterringsegmenter sammen ikke en fullstendig sirkel, men kiler 6 er innsatt diametralt overfor hverandre mellom de to segmenter, idet segmentenes endeflater er utformet som skråflater overensstemmende med kilens 6 skråflater. Kilen 6 spennes med bolter 7 til rotas jonslegemet 5 for å sikre kutterringsegmentenes feste til rotasjonslegemet. Fig. 3 shows a cross-section of another embodiment of attachment for the cutter ring's two segments. Here, the two cutter ring segments together do not form a complete circle, but wedges 6 are inserted diametrically opposite each other between the two segments, the end surfaces of the segments being designed as inclined surfaces corresponding to the inclined surfaces of the wedge 6. The wedge 6 is fastened with bolts 7 to the rotating body 5 to ensure the attachment of the cutter ring segments to the rotating body.

For aksial styring av kutterringsegmentene er føringer 8 festet til rotasjonslegemet 5 på hver side av kutterringen 1. I en annen utførelse er en midtre føring 9 festet til rotasjonslegemet 5. For axial control of the cutter ring segments, guides 8 are attached to the rotary body 5 on each side of the cutter ring 1. In another embodiment, a middle guide 9 is attached to the rotary body 5.

Fig. 7 viser et diagram over penetrering i millimeter pr omdreining i forhold til kraften mot hver kutter i kN for to ulike materialer i kutterens egg, hvor A viser en kutterring med hardmetall og B en kutterring i stål. Fig. 7 shows a diagram of penetration in millimeters per revolution in relation to the force against each cutter in kN for two different materials in the cutter's egg, where A shows a cutter ring with hard metal and B a steel cutter ring.

Claims

1. Cutter ring for tunnel and shaft drilling in rock, CHARACTERIZED BY the fact that the cutter ring (1) is produced as at least two cutter ring segments and that the segments are clamped to the cutter ring's (1) rotation body (5) with clamping devices which with inclined surfaces rest against corresponding inclined surfaces on the cutter ring (1) segments.

2. Cutter ring according to claim 1, CHARACTERIZED BY the fact that the opposite parts (2) of the cutter ring body in axial section show a dovetail shape and the rotary body (5) has a correspondingly designed groove (3) whose one side wall is formed in the body (5) and whose other side wall is formed by a nut (4) has one slanted end face, as the nut (4) has corresponding threads on the rotation body (5).

3. Cutter ring according to claim 1, CHARACTERIZED IN THAT the segments of the cutter ring (1) have axially inclined end surfaces for fastening to the rotary body (5) with wedges (6) which are arranged for fastening to the rotary body (5) between the segments of the cutter ring (1), preferably diametrically towards each other.

4. Cutter ring according to claim 3, CHARACTERIZED IN THAT at least one guide (8, 9) is arranged on the rotary body (5) and lies axially against the cutter ring segments to prevent axial displacement of the cutter ring segments in relation to the rotary body (5).