NO882384L - DEVICE FOR TENSIONING CONNECTIONS. - Google Patents
DEVICE FOR TENSIONING CONNECTIONS.Info
- Publication number
- NO882384L NO882384L NO88882384A NO882384A NO882384L NO 882384 L NO882384 L NO 882384L NO 88882384 A NO88882384 A NO 88882384A NO 882384 A NO882384 A NO 882384A NO 882384 L NO882384 L NO 882384L
- Authority
- NO
- Norway
- Prior art keywords
- thread
- trade
- threaded
- ratio
- coupling
- Prior art date
Links
- 230000008878 coupling Effects 0.000 claims description 19
- 238000010168 coupling process Methods 0.000 claims description 19
- 238000005859 coupling reaction Methods 0.000 claims description 19
- 230000000694 effects Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L15/00—Screw-threaded joints; Forms of screw-threads for such joints
- F16L15/001—Screw-threaded joints; Forms of screw-threads for such joints with conical threads
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B33/00—Features common to bolt and nut
- F16B33/02—Shape of thread; Special thread-forms
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B7/00—Connections of rods or tubes, e.g. of non-circular section, mutually, including resilient connections
- F16B7/18—Connections of rods or tubes, e.g. of non-circular section, mutually, including resilient connections using screw-thread elements
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Earth Drilling (AREA)
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
- Vehicle Body Suspensions (AREA)
Description
Oppfinnelsen angår en anordning ved strekkstagkoblinger med en gjenget handel og hundel anordnet koaksialt i forhold til strekkstaget. The invention relates to a device for tension rod connections with a threaded male and female arranged coaxially in relation to the tension rod.
Fra tidligere kjente koblinger av denne type er det for mot-virkning av utmatingsbrudd kjent å redusere forskjellen mellom den last som bæres av hver gjenge, ved aksial forspenning av koblingen, anvendelse av koniske gjengepartier, ulik gjengestigning for handelens og hundelens gjengeparti og varierende gjengestigning på samme gjengeparti. Videre er det kjent å redusere de maksimale spenninger i gjengebunnen, dvs. partiet mellom nabogjenger, ved avrunding av denne. From previously known couplings of this type, it is known to counteract the effect of feed breakage by reducing the difference between the load carried by each thread, by axial prestressing of the coupling, the use of conical thread sections, different thread pitch for the trade and dog link's thread section and varying thread pitch on same gang party. Furthermore, it is known to reduce the maximum stresses in the bottom of the thread, i.e. the part between neighboring threads, by rounding it off.
Selv om levetiden for slike koblinger på denne måte er blitt forlenget, fortsettes arbeidet med å forbedre disse ytter-ligere. Hensikten med oppfinnelsen er således å skaffe en kobling av den innledningsvis nevnte type med lengere levetid enn de kjente koblinger. Although the lifetime of such links has been extended in this way, work continues to improve these further. The purpose of the invention is thus to provide a coupling of the initially mentioned type with a longer lifetime than the known couplings.
Det særegne ved anordningen ifølge oppfinnelsen fremgår av de i kravene angitte kjennetegnende trekk. The peculiarity of the device according to the invention can be seen from the characteristic features stated in the claims.
Oppfinnelsen vil i det følgende bli beskrevet nærmere under henvisning til tegningen som viser et utførelseseksempel på en anordning ved en kobling ifølge oppfinnelsen. Fig. 1 er et skjematisk sideriss av en handel av en kobling, delvis i snitt. Fig. 2 er et skjematisk sideriss av en hundel av en kobling, delvis i snitt. The invention will be described in more detail in the following with reference to the drawing which shows an exemplary embodiment of a device for a coupling according to the invention. Fig. 1 is a schematic side view of a trade of a coupling, partly in section. Fig. 2 is a schematic side view of a female part of a coupling, partially in section.
Fig. 3 viser et gjengeprofil for koblingsdelene.Fig. 3 shows a thread profile for the connecting parts.
Som det fremgår av fig. 1 har handelen 1 et endeparti 3 med en sylindrisk boring og en konisk, ytre overflate som er tilspisset fra et hælparti 9 mot endepartiets frie ende eller tå 7, og hvori det er utformet gjenger 5. Som det fremgår av fig. 2 har hundelen 2 et endeparti 4 med en sylindrisk ytre overflate og en konisk, indre overflate som er tilspisset fra et hælparti 10 mot endepartiets frie ende eller tå 8, og hvori det er utformet gjenger 6 som tilsvarer handelens gjenger 5. As can be seen from fig. 1, the handle 1 has an end part 3 with a cylindrical bore and a conical outer surface which is tapered from a heel part 9 towards the end part's free end or toe 7, and in which threads 5 are formed. As can be seen from fig. 2, the female part 2 has an end part 4 with a cylindrical outer surface and a conical, inner surface which is tapered from a heel part 10 towards the free end or toe 8 of the end part, and in which threads 6 corresponding to the trade threads 5 are formed.
Søkeren har funnet at en tilnærmet lik belastning av hver gjenge kan oppnås under belastning av koblingen dersom forholdet mellom tverrsnittsarealet av godset av endepartiet ved hundelens resp. handelens hæl og tå er 7,006 resp. 8,990, konusvinkelen er 20,6°, forholdet mellom gjengediameteren ved tåen av handelens gjengeparti og dettes lengde er 1,283, forholdet mellom gjengediameteren ved tåen av handelens gjengeparti og gjengestigningen er 38,636 og forholdet mellom handelens og hundelens gjengestigning er 1,000284. The applicant has found that an approximately equal load on each thread can be achieved under load on the coupling if the ratio between the cross-sectional area of the goods of the end part at the dog link or the heel and toe of the trade are 7.006 resp. 8.990, the taper angle is 20.6°, the ratio between the thread diameter at the toe of the threaded part of the trade and its length is 1.283, the ratio between the thread diameter at the toe of the threaded part of the trade and the thread pitch is 38.636 and the ratio between the thread pitch of the trade and the dog link is 1.000284.
Under sammenskruing og tiltrekking av koblingsdelene, vil det mellom innbyrdes anliggende gjengeflanker utøves radielle kref-ter som forårsaker forspenning av gjengene, hvilket er fordel-aktig. For koblinger med kjente gjengeprofiler vil det under aksiell belastning av strekkstaget imidlertid finnes en spenningskonsentrasjon på det laveste parti av gjengebunnen. Dersom gjengebunnen ifølge oppfinnelsen utformes slik at overflatens krumning i et lengdesnitt gjennom koblingen er relativt liten ved det laveste parti og tiltar mot høyereliggende partier av den lastbærende gjengeflanke, vil spenningskonsentrasjonen forskyves mot og eventuelt opp på denne gjengeflanke samtidig som den maksimale spenning reduseres. Herved blir gjengene også lavere og koblingens levetid øket vesentlig. During screwing together and tightening of the coupling parts, radial forces will be exerted between adjacent thread flanks which cause pretensioning of the threads, which is advantageous. For couplings with known thread profiles, however, there will be a stress concentration on the lowest part of the thread base under axial load of the tension rod. If the thread base according to the invention is designed so that the curvature of the surface in a longitudinal section through the coupling is relatively small at the lowest part and increases towards higher parts of the load-bearing thread flank, the stress concentration will be shifted towards and possibly up on this thread flank at the same time as the maximum stress is reduced. In this way, the threads are also lower and the service life of the coupling is significantly increased.
Fortrinnsvis er gjengebunnen utformet slik at den i det nevnte lengdesnitt er f.eks. elliptisk, idet ellipsens store akse for-løper tilnærmet parallelt med koblingens lengdeakse og forholdet mellom den største og den minste krumningsradius av ellip-sen er 1,5 - 1,7. Preferably, the threaded base is designed so that in the aforementioned longitudinal section it is e.g. elliptical, in that the major axis of the ellipse runs approximately parallel to the longitudinal axis of the coupling and the ratio between the largest and the smallest radius of curvature of the ellipse is 1.5 - 1.7.
Selv om det ovenfor er beskrevet en kobling hvor handelens sentrale hull og den ytre overflate av hundelen er sylindrisk, kan disse ha annen form, f.eks. konusform. Although a coupling has been described above where the central hole of the trade and the outer surface of the female part are cylindrical, these can have a different shape, e.g. cone shape.
Claims (6)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NO88882384A NO882384L (en) | 1988-05-31 | 1988-05-31 | DEVICE FOR TENSIONING CONNECTIONS. |
DE3913974A DE3913974A1 (en) | 1988-05-31 | 1989-04-27 | Arrangement for the releasable connection of two bodies, in particular tie-rod connection |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NO88882384A NO882384L (en) | 1988-05-31 | 1988-05-31 | DEVICE FOR TENSIONING CONNECTIONS. |
Publications (2)
Publication Number | Publication Date |
---|---|
NO882384D0 NO882384D0 (en) | 1988-05-31 |
NO882384L true NO882384L (en) | 1989-12-01 |
Family
ID=19890932
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NO88882384A NO882384L (en) | 1988-05-31 | 1988-05-31 | DEVICE FOR TENSIONING CONNECTIONS. |
Country Status (2)
Country | Link |
---|---|
DE (1) | DE3913974A1 (en) |
NO (1) | NO882384L (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU6815798A (en) * | 1997-03-24 | 1998-10-20 | C-Fer Technologies Inc. | Rotary drive shaft for downhole pump |
DE50306502D1 (en) | 2003-06-19 | 2007-03-29 | Abb Turbo Systems Ag | Shaft / hub connection of a turbocharger |
-
1988
- 1988-05-31 NO NO88882384A patent/NO882384L/en unknown
-
1989
- 1989-04-27 DE DE3913974A patent/DE3913974A1/en not_active Withdrawn
Also Published As
Publication number | Publication date |
---|---|
DE3913974A1 (en) | 1989-12-14 |
NO882384D0 (en) | 1988-05-31 |
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