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DE1145441B - Screw connection - Google Patents

Screw connection

Info

Publication number
DE1145441B
DE1145441B DER25946A DER0025946A DE1145441B DE 1145441 B DE1145441 B DE 1145441B DE R25946 A DER25946 A DE R25946A DE R0025946 A DER0025946 A DE R0025946A DE 1145441 B DE1145441 B DE 1145441B
Authority
DE
Germany
Prior art keywords
screw
screw part
screw connection
sleeve
transverse
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.)
Pending
Application number
DER25946A
Other languages
German (de)
Inventor
Dipl-Ing Carl Heinz Haefele
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
RHEINISCHE ARMATUREN- und MASCHINENFABRIK
Original Assignee
RHEINISCHE ARMATUREN- und MASCHINENFABRIK
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from DER11278A external-priority patent/DE958516C/en
Application filed by RHEINISCHE ARMATUREN- und MASCHINENFABRIK filed Critical RHEINISCHE ARMATUREN- und MASCHINENFABRIK
Priority to DER25946A priority Critical patent/DE1145441B/en
Publication of DE1145441B publication Critical patent/DE1145441B/en
Pending legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16BDEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B31/00Screwed connections specially modified in view of tensile load; Break-bolts
    • F16B31/04Screwed connections specially modified in view of tensile load; Break-bolts for maintaining a tensile load
    • F16B31/043Prestressed connections tensioned by means of liquid, grease, rubber, explosive charge, or the like
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16BDEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B4/00Shrinkage connections, e.g. assembled with the parts at different temperature; Force fits; Non-releasable friction-grip fastenings
    • F16B4/002Shrinkage 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

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Clamps And Clips (AREA)

Description

Das Patent 958 516 schützt Schraubverbindungen, deren Schraubteil vor dem Festziehen der Muttern durch eine unter Druck stehende Flüssigkeit vorgespannt, d. h. gelängt wird. Nach dem Anziehen der Muttern und Ablassen des Flüssigkeitsdruckes überträgt sich die der vorangegangenen Dehnung entsprechende axiale Kraft auf die gesamte Schraubverbindung. The patent 958 516 protects screw connections, their screw part from tightening the nuts biased by a pressurized fluid, d. H. is lengthened. After getting dressed the nuts and releasing the fluid pressure is transferred to that of the previous stretch corresponding axial force on the entire screw connection.

Durch den hohen Flüssigkeitsdruck im Innern des Schraubteiles treten jedoch auch tangentiale Zugspannungen auf, die eine Querdehnung, d. h. eine Verkürzung des Schraubteiles, herbeiführen. Die wirksame Längung des Schraubteiles ist die Differenz zwischen der Längung durch die hydraulischen Axialkräfte und der Verkürzung durch die auftretende tangentiale Zugspannung.However, due to the high fluid pressure inside the screw part, there are also tangential tensile stresses on which a transverse strain, d. H. a shortening of the screw part. The effective The elongation of the screw part is the difference between the elongation caused by the hydraulic axial forces and the shortening due to the tangential tensile stress that occurs.

Das Maß der erzielten Längung bestimmt andererseits die gewünschte Vorspannung, die man z. B. den Einbaustücken erteilen will.The degree of elongation achieved, on the other hand, determines the desired bias, which is z. B. the Wants to issue chocks.

Um diese unerwünschten Tangentialspannungen und die damit verbundenen Querdehnungen zu vermeiden, wurde bereits nach einem bekannten Verfahren in ein rohrförmiges Schraubteil einKembolzen mit einem abdichtenden Kolben eingesetzt, so daß die verbleibende Höhe des Druckraumes beliebig klein sein kann. Damit treten in ihrer Wirksamkeit nur noch geringe tangentiale Zugspannungen auf, und zwar im Bereich der geringen Höhe des Druckraumes. In order to avoid these unwanted tangential stresses and the associated transverse strains, a Kembolzen was already in a tubular screw part according to a known method used with a sealing piston, so that the remaining height of the pressure chamber is arbitrarily small can be. This means that only slight tangential tensile stresses occur in their effectiveness, and although in the area of the low height of the pressure chamber.

Die vorliegende Erfindung verhindert die Querdehnung des Schraubteiles durch Querbohrungen vom inneren Hohlraum des Schraubteiles zur äußeren Mantelfläche. Diese Querbohrungen werden durch eine an ihren Enden abdichtende Hülse abgedeckt.The present invention prevents the transverse expansion of the screw part through transverse bores from the inner cavity of the screw to the outer surface. These cross holes are through covered a sleeve sealing at their ends.

Die Lösung ist deshalb so einfach, da in den meisten Fällen .die in der Abbildung gezeigte Hülse a durch das zu spannende Maschinenteil selbst ersetzt wird.The solution is so simple because in most cases. The sleeve a shown in the figure is replaced by the machine part to be clamped itself.

Die Abbildimg zeigt ein Ausführungsbeispiel, bei dem über das Schraubteil c eine Hülse α geschoben ist, welche Tangentialspannungen aufnimmt, ohne die Längsdehnung des eigentlichen Schraubteiles zu beeinflussen. Die Hülse α ist oben und unten zum Schraubteil abgedichtet. Diese Abdichtung kann z. B. einseitig auch durch eine feste Verbindung hergestellt werden. Beim Längen des Schraubteiles wird nun SchraubverbindungThe illustration shows an embodiment in which a sleeve α is pushed over the screw part c , which takes up tangential stresses without influencing the longitudinal expansion of the actual screw part. The sleeve α is sealed at the top and bottom to the screw part. This seal can, for. B. can also be established on one side by a fixed connection. When lengthening the screw part, there is now a screw connection

Zusatz zum Patent 958 516Addendum to patent 958 516

Anmelder:Applicant:

Rheinische Armaturen- und Maschinenfabrik,Rheinische Armaturen- und Maschinenfabrik,

Albert Sempell,
Mönchengladbach, Lürriperstr. 1-13
Albert Sempell,
Mönchengladbach, Lürriperstr. 1-13

Dipl.-Ing. Carl Heinz Häfele, Mönchengladbach,
ist als Erfinder genannt worden
Dipl.-Ing. Carl Heinz Häfele, Mönchengladbach,
has been named as the inventor

nicht nur Flüssigkeit in den Hohlraum b eingedrückt, sondern gleichzeitig über die Querbohrungen d in den Spaltraum zwischen Schraubteile und Hülse α. Es erfolgt nun eine starke Längung ohne Querdehnung.not only is the liquid pressed into the cavity b , but at the same time via the transverse bores d into the gap between the screw parts and the sleeve α. There is now a strong elongation without transverse expansion.

Claims (2)

Patentansprüche :Patent claims: 1. Schraubverbindung mit einem vor dem Festziehen unter Vorspannung gesetzten Schraubteil, das durch Einleiten von unter Druck stehender Flüssigkeit in Hohlräume des Schraubteiles dehnbar ist, wobei nach Festziehen der Schraubverbindung die Druckflüssigkeit ablaßbar ist, nach Patent 958 516, dadurch gekennzeichnet, daß zur Verhinderung der Querdehnung das Schraubteil (c) mit dem Hohlraum (b) und die äußeren Mantelflächen verbindenden Querbohrungen (d) versehen ist, die durch eine mit an sich bekannten O-RLngen (e) abgedichtete Hülse (α) abgedeckt sind.1. Screw connection with a pre-tensioned screw part before tightening, which is expandable by introducing pressurized liquid into cavities of the screw part, after tightening the screw connection, the pressure fluid can be drained, according to patent 958 516, characterized in that to prevent the Transverse expansion the screw part (c) is provided with the cavity (b) and the transverse bores (d) connecting the outer jacket surfaces, which are covered by a sleeve (α) sealed with known O-rings (e). 2. Schraubverbindung nach Anspruch 1, dadurch gekennzeichnet, daß als Hülse (a) ein Maschinenteil selbst dient, in dem das Schraubteil eingesetzt ist.2. Screw connection according to claim 1, characterized in that a machine part itself serves as the sleeve (a) in which the screw part is inserted. In Betracht gezogene Druckschriften:
Deutsche Auslegeschriften Nr. 1050291,1054042.
Considered publications:
German Auslegeschriften No. 1050291,1054042.
Hierzu 1 Blatt Zeichnungen1 sheet of drawings
DER25946A 1953-03-26 1959-07-15 Screw connection Pending DE1145441B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DER25946A DE1145441B (en) 1953-03-26 1959-07-15 Screw connection

Applications Claiming Priority (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

Publications (1)

Publication Number Publication Date
DE1145441B true DE1145441B (en) 1963-03-14

Family

ID=25991132

Family Applications (1)

Application Number Title Priority Date Filing Date
DER25946A Pending DE1145441B (en) 1953-03-26 1959-07-15 Screw connection

Country Status (1)

Country Link
DE (1) DE1145441B (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1054042B (en) * 1957-12-23 1959-04-02 Moeller & Neumann Gmbh Device for the length of a tie rod independent of the clamping nut
DE1050291B (en) * 1963-10-09 1967-09-14 Moeller ß. Neumann G.m.b.H., St. Ingbert/Saar Device for the length of a tie rod independently of the clamping nut

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1054042B (en) * 1957-12-23 1959-04-02 Moeller & Neumann Gmbh Device for the length of a tie rod independent of the clamping nut
DE1050291B (en) * 1963-10-09 1967-09-14 Moeller ß. Neumann G.m.b.H., St. Ingbert/Saar Device for the length of a tie rod independently of the clamping nut

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