DE958516C - Screw connection with a screw part that is pre-tensioned by a pressurized fluid before tightening - Google Patents
Screw connection with a screw part that is pre-tensioned by a pressurized fluid before tighteningInfo
- Publication number
- DE958516C DE958516C DER11278A DER0011278A DE958516C DE 958516 C DE958516 C DE 958516C DE R11278 A DER11278 A DE R11278A DE R0011278 A DER0011278 A DE R0011278A DE 958516 C DE958516 C DE 958516C
- Authority
- DE
- Germany
- Prior art keywords
- screw
- connection
- tensioned
- screw part
- pressurized fluid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 239000012530 fluid Substances 0.000 title description 3
- 239000007788 liquid Substances 0.000 claims description 8
- 238000005452 bending Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000036316 preload 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
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B4/00—Shrinkage connections, e.g. assembled with the parts at different temperature; Force fits; Non-releasable friction-grip fastenings
- F16B4/002—Shrinkage connections, e.g. assembled with the parts at different temperature; Force fits; Non-releasable friction-grip fastenings engaging or disengaging by means of fluid pressure
-
- 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
- F16B31/00—Screwed connections specially modified in view of tensile load; Break-bolts
- F16B31/04—Screwed connections specially modified in view of tensile load; Break-bolts for maintaining a tensile load
- F16B31/043—Prestressed connections tensioned by means of liquid, grease, rubber, explosive charge, or the like
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mutual Connection Of Rods And Tubes (AREA)
Description
Die Verbindung zweier oder mehrerer Maschinenteile, die nach ihrem Zusammenfügen Kräfte aufnehmen soll, ohne daß diese Verbindung- sich lockert, muß eine Vorspannung aufweiseai, die gleich oder größer als die während des Betriebes auftretende Spannung ist. Handelt es. sich um große Kräfte, die durch die Spannverbindung ausgeübt werden, sollen, so müssen, wenn, man von Schrumpfverbindungen, die die WärmedehnungenThe connection of two or more machine parts that absorb forces after they have been joined should, without this connection loosening, must have a preload ai that is equal to or greater than the voltage occurring during operation. Does it. around large forces that are exerted by the tensioning connection should, if so, one of Shrink connections that reduce the thermal expansion
ίο ausnutzen, absieht, viele im Durchmesser begrenzte Schraubenbolzen benutzt werden. Bei Verwendung von, nur einer Schraube, die einen, entsprechend größeren Querschnitt hat, werden die zum Anziehen der Scfaraubenverbindung notwendigen Kräfte so groß, daß sie mit normalen Montagemitteln und geringem Aufwand nicht mehr aufgebracht werden, können.. Eine einzige Schraube oder Schraubmuffe wäre aber herstellungsmäßig billiger und würde Material sparen. Dies trifft besonders bei Verbindungen zu, bei denen, durch Verwendung vieler Schrauben Biegemomentie entstehen, z. B. bei einer Flanschverbindung zwischen zwei Rohren.ίο exploit, disregard, many limited in diameter Bolts are used. When using, only one screw, one, accordingly has a larger cross-section, those are necessary to tighten the screw connection Forces so great that they can no longer be applied with normal assembly equipment and little effort .. A single screw or screw socket would be cheaper to manufacture and would save material. This is especially true with connections where, by use many screws bending moment arise, z. B. with a flange connection between two pipes.
Es sind Preßverbindungen zweier Teile bekannt, bei denen zum Herstellen oder Lösen der Verbindung ein Teil durch ein hydraulisches Druckmittel gedehnt wird. Ferner wurde bereits eine Einrichtung zum Erleichtern, des Anziehens und Lösens großer, stark belasteter Muttern vorgeschlagen:, wobei der Schraubenbolzen dadurch dehnbar ist, daß eine unter Druck stehende Flüssigkeit auf einen mit dem Schraubenbolzen verschraubten,, mit einem Zylinder zusammenarbeitenden Kolben wirkt. Nach, dem Anziehen der Schraubenmutter auf dem Schraubenbolzen! wird die Flüssigkeit abgelassen.There are press-fit connections of two parts are known, in which to establish or release the connection a part is stretched by a hydraulic pressure medium. Furthermore, an institution has already been established Suggested to facilitate the tightening and loosening of large, heavily loaded nuts :, wherein the screw bolt is expandable in that a pressurized liquid a piston screwed to the screw bolt, cooperating with a cylinder, acts. After tightening the screw nut on the screw bolt! the liquid is drained.
Demgegenüber wird! gemäß der Erfindung vorgeschlagen, daß das eine Schraubten der Schraubverbindung durch Einleiten der unter Druck stehenden Flüssigkeit in. Hohlräume dieses. Schraubteils dehnbar ist.In contrast,! proposed according to the invention, that the one screwing the screw connection by introducing the pressurized Fluid in. Cavities this. Screw part is stretchable.
Abb. ι zeigt als Beispiel für eine außerhalb der miteinander zu verbindenden Teile liegende Verbindung eine Rohrverbindung. Das eine Schraubteil α wird durch das Eindrücken! einer hochgespannten Flüssigkeit in die Hohlräume b, z. B. Fig. Ι shows a pipe connection as an example of a connection located outside of the parts to be connected to one another. One screw part α is pushed in! a highly stressed liquid in the cavities b, z. B.
Bohrungen, in seiner Spannlänge gedehnt. Sodann wird das andere Schraubteil c in Form einer Gewindebüchse so weit eingeschraubt, daß es über die Ringe d die beiden Rohrbunde e mit der Dichtung / zur Anlage bringt. Die Gewindebüchse und die geteilten Ringe d können wegfallen, wenn man das eine Schraubteil α geteilt ausführt. Dabei können dann aber keinei größeren, Bearbeitungstoleranzen mehr zugelassen werden. Wird der Flüssigkeitsdruck aus den Hohlräumen, b abgelassen, so überträgt sich die der vorhergegangenen Dehnung entsprechende axiale Kraft über die geteilten. Ringe d auf die beiden Rohrbunde e und preßt die zwischengelagerte Dichtung / gleichmäßig über den Umfang zusammen. Die Dichtung kamm auch in bekannter Weise als Schweiß dichtung ausgeführt werden. Die in dem einen Schraubtail α verbleibende Spannung ist größer als die durch den Betrieb auftretenden Spannungen. Damit ist die Dichtheit der Verbindung gewährleistet, ■ wobei das Gewicht einer normalen Flanschverbindung das Vielfache des Gewichtes dieser Schraubverbindung beträgt.Bores, stretched in its span length. Then the other screw part c in the form of a threaded bushing is screwed in so far that it brings the two pipe collars e with the seal / into contact via the rings d. The threaded bushing and the split rings d can be omitted if the one screw part α is carried out split. In this case, however, larger machining tolerances can no longer be permitted. If the fluid pressure is released from the cavities, b , the axial force corresponding to the previous expansion is transmitted via the divided ones. Rings d on the two tube coils e and presses the intermediate seal / evenly over the circumference. The seal comb can also be carried out in a known manner as a weld seal. The tension remaining in one screw tail α is greater than the tension occurring during operation. This ensures the tightness of the connection, ■ the weight of a normal flange connection being a multiple of the weight of this screw connection.
Abb. 2 zeigt ein Beispiel für eine innerhalb der miteinander zu verbindendem Teile liegende Verbindung bei einer geteilten Kurbelwelle. Der als Anker h ausgebildete eine Schraubteil wird durch eine hochgespannte Flüssigkeit, die in die Hohlräume g gedrückt wird, in axialer Richtung gedehnt. Nachdem die Mutter / als anderes Schraubteil leicht angezogen ist, wird die Flüssigkeilt abgelassen,. Damit hat die Verbindung die notwendige Vorspannung.Fig. 2 shows an example of a connection located within the parts to be connected with a split crankshaft. The one screw part, designed as an anchor h , is stretched in the axial direction by a highly tensioned liquid which is pressed into the cavities g. After the nut / other screw part is slightly tightened, the liquid wedge is drained off. This gives the connection the necessary pretension.
Claims (1)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DER11278A DE958516C (en) | 1953-03-26 | 1953-03-26 | Screw connection with a screw part that is pre-tensioned by a pressurized fluid before tightening |
DER25946A DE1145441B (en) | 1953-03-26 | 1959-07-15 | Screw connection |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DER11278A DE958516C (en) | 1953-03-26 | 1953-03-26 | Screw connection with a screw part that is pre-tensioned by a pressurized fluid before tightening |
Publications (1)
Publication Number | Publication Date |
---|---|
DE958516C true DE958516C (en) | 1957-02-21 |
Family
ID=7398549
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DER11278A Expired DE958516C (en) | 1953-03-26 | 1953-03-26 | Screw connection with a screw part that is pre-tensioned by a pressurized fluid before tightening |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE958516C (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1110595B (en) * | 1958-09-20 | 1961-07-13 | Moeller & Neumann Gmbh | Standless rolling frame |
DE1132766B (en) * | 1959-05-20 | 1962-07-05 | Verwaltungsgesellschaft Moelle | Device for the hydraulic length of a screw bolt for the purpose of setting a preload |
DE1147805B (en) * | 1955-10-08 | 1963-04-25 | Voith Gmbh J M | Device for making screw, shrink or press connections |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE820992C (en) * | 1949-09-29 | 1951-11-15 | Motorenfabrik Darmstadt G M B | Motor with pressurized oil-controlled connections of its machine elements, e.g. B. the crankshaft parts, the flywheel on the crankshaft o. |
-
1953
- 1953-03-26 DE DER11278A patent/DE958516C/en not_active Expired
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE820992C (en) * | 1949-09-29 | 1951-11-15 | Motorenfabrik Darmstadt G M B | Motor with pressurized oil-controlled connections of its machine elements, e.g. B. the crankshaft parts, the flywheel on the crankshaft o. |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1147805B (en) * | 1955-10-08 | 1963-04-25 | Voith Gmbh J M | Device for making screw, shrink or press connections |
DE1110595B (en) * | 1958-09-20 | 1961-07-13 | Moeller & Neumann Gmbh | Standless rolling frame |
DE1132766B (en) * | 1959-05-20 | 1962-07-05 | Verwaltungsgesellschaft Moelle | Device for the hydraulic length of a screw bolt for the purpose of setting a preload |
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