SE123798C1

SE123798C1 -

Info

Publication number: SE123798C1
Authority: SE
Publication date: 1948-01-01

Description

Uppfinnare: K. R. SiOblom. Inventor: K. R. SiOblom.

Foreliggande uppfinning avser en anordning for att fà veka, roterande skivor, exempelvis turbinskivor, styvare i andamal att hindra uppkomsten av farliga svangningar, som genom utmattning kunna orsaka materialbrott. Uppfinningen kan.neteeknas i huvudsak av att koaxialt med skivorna aro vid dessas sidor uppstigningsringar utbytbart infastade i spar i skivorna och vid sin inneryta pa sadant salt medelst tradar fastdiktade vid skivan, att dennas infastningsdel darvid pressas radiellt utat. The present invention relates to a device for making soft, rotating discs, for example turbine discs, stiffer in the spirit of preventing the occurrence of dangerous oscillations, which by fatigue can cause material breakage. The invention can be mainly characterized by the fact that coaxially with the discs are on their sides ascending rings interchangeably fastened in grooves in the discs and at their inner surface on such salt by means of threads fixed to the disc, that its fastening part is thereby pressed radially outwards.

Pa bifogade ritning visar fig. 1 ett axiellt snitt genom en turbinskiva. Fig. 2 och 3 visa ett par exempel ph hur ringen kan vara infast. In the accompanying drawing, Fig. 1 shows an axial section through a turbine disc. Figs. 2 and 3 show a couple of examples ph how the ring can be attached.

Turhinskivan betecknas med 1. Denna uppbar skovelringar 2 fOr radiell genomstramning av drivmediet och en skovelkrans 3 for axiell genomstromning. Vid skivans ena sidoyta dr yid ytterdelen en uppstyvningsring 4 infast i ett spar 5 och diktad fast vid skivan medelst en dikttrad 6. Ringen 4 visas utat avsmalnande for att fa ringens tyngdpunkt narmare skivan. The turbine disc is denoted by 1. This carried vane rings 2 for radial flow of the propellant and a vane ring 3 for axial flow. At one side surface of the disc, a stiffening ring 4 is attached to the outer part, fixed in a groove 5 and dictated to the disc by means of a line of dictation 6. The ring 4 is shown tapering out to bring the center of gravity of the ring closer to the disc.

I fig. 2 visas, hur ringen 4 infores i sparet 5. Da flansen 7 kommit pa sin plats i spiret 8, sakras detta lage, genom att traden 6 diktas in vid Hansen 9. Fig. 3 visar en modifierad infastning. Fig. 2 shows how the ring 4 is inserted into the groove 5. When the flange 7 has come into place in the spire 8, this layer is secured by the wire 6 being dictated to Hansen 9. Fig. 3 shows a modified fastening.

Att ringen enligt uppfinningen är utbytbar, medfor flera fordelar. Man fir mojlighet att i saraband med vibrationsmatningar prova ut den lampligaste bredden pa ringen 4, antmgen genom svarvning av ringbredden eller genom utbyte av ringar, som finnas pa lager. I fig. 1 markera de streckade linjerna 10 ett bortsvarvat parti. Man kan anvanda olika material i skiva och ring, vilket gOr, att man far fria hander att valja det for ringen basta och lampligaste materialet. Alt applicera en separat ring vid skivan blir betydligt billigare in att smida ut en flans fran skivmaterialet. The fact that the ring according to the invention is interchangeable has several advantages. It is possible to test the most suitable width of the ring 4 in combination with vibration feeds, either by turning the ring width or by replacing the rings, which are in stock. In Fig. 1, the dashed lines 10 mark a turned away portion. You can use different materials in the disc and ring, which means that you have free hands to choose the best and most suitable material for the ring. Applying a separate ring to the board will be significantly cheaper to forge a flange from the board material.

I drift vaxer pa grund av centrifugalkraften skivdiametern mer an uppstyvningsringen, beroende pa att skivan ir mer belastad (bl. a. med axialstromningsskovlar). Genom att den pa.knappta ringens infastningsdel dikIns uppat medelst en dikttrad 6, gives derma del en forspanning genom en uthojning, som sedan vid normalt varvtal, dà aven ringdiametern vaxt, garanterar att infastningsgreppet alltjamt är lihlfOrlitligt. Ar ingreppet ej fast, giver ringen inget stod mot vibrationer. In operation, due to the centrifugal force, the disc diameter increases more than the stiffening ring, due to the fact that the disc is more loaded (eg with axial flow vanes). By thickening the fastening part of the buttoned ring upwards by means of a line of dictation 6, this part is given a bias voltage through an increase, which then at normal speed, when the ring diameter has also grown, guarantees that the fastening grip is still reliable. If the intervention is not fixed, the ring does not withstand vibrations.

Claims

Patent claim:

Device for rotating disks, for example turbine disks, characterized in that, coaxially with the disks (1), stiffening rings (4) on their sides are interchangeably fixed in grooves (5) in the disks, and at their inner surface in this way by means of fractal (6) ) fixed to the disc, that its fastening part is thereby pressed radially outwards.

Device according to claim 1, characterized in that the thickness of the stiffening ring (4) decreases outside the fastening spirit of Iran. Stockholm 1949. Kungl. Boktr. P. A. Norstedt & Slier 490089