Rod tensioning device and assembly process of such a device on a rod
AssigneeAktiebolaget Skf
InventorMarc Alegre
Life of this patent
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Abstract
The invention concerns a rod tensioning device having a first actuator, at least a second actuator and a tubular support sleeve dedicated to radially surround a threaded rod. Each of the actuators provides a cylinder, and a piston sliding in the cylinder and forming with the cylinder an annular chamber dedicated to be supplied with pressurized fluid. According to the invention, the at least second actuator is temporary axially arranged between the first actuator and the tubular support sleeve for a temporary blockwise assembly, the pistons of two axially adjacent actuators being indexed in rotation together.
Claims10
A rod tensioning device comprising:
- a first actuator, and a tubular support sleeve dedicated to radially surround a threaded rod, the first actuator providing a cylinder, and a piston sliding in the cylinder and forming with the cylinder an annular chamber dedicated to be supplied with pressurized fluid, the annular chamber being sealed by sealing means interposed between the cylinder and piston, the piston having an annular threaded bore dedicated to be engaged with the threaded rod so as to be adapted to transmit a tensioning axial force (F) from the actuator towards the threaded rod, and
- at least a second actuator having a cylinder, and a piston sliding in the cylinder and forming with the cylinder an annular chamber dedicated to be supplied with pressurized fluid, the annular chamber being sealed by sealing means interposed between the cylinder and piston, the at least second actuator being temporary axially arranged between the first actuator and the tubular support sleeve for a temporary blockwise assembly, the pistons of two axially adjacent actuators being indexed in rotation together by indexing means.
A method of assembling a rod tensioning device that is disposed around a threaded rod axially protruding from a structure, the method comprising:
- providing a first actuator, and a tubular support sleeve dedicated to radially surround a threaded rod, the first actuator providing a cylinder, and a piston sliding in the cylinder and forming with the cylinder an annular chamber dedicated to be supplied with pressurized fluid, the annular chamber being sealed by sealing means interposed between the cylinder and piston, the piston having an annular threaded bore dedicated to be engaged with the threaded rod so as to be adapted to transmit a tensioning axial force (F) from the actuator towards the threaded rod, and
- providing at least a second actuator having a cylinder, and a piston sliding in the cylinder and forming with the cylinder an annular chamber dedicated to be supplied with pressurized fluid, the annular chamber being sealed by sealing means interposed between the cylinder and piston, the at least second actuator being temporary axially arranged between the first actuator and the tubular support sleeve for a temporary blockwise assembly, the pistons of two axially adjacent actuators being indexed in rotation together by indexing means, further comprising the steps:
- mounting the tubular support sleeve around the threaded rod, the tubular support resting against the structure;
- axially mounting the at least second actuator on the tubular support sleeve and around the threaded rod, the at least second actuator resting against the tubular support sleeve;
- axially mounting the first actuator on the second actuator and around the threaded rod, the first actuator resting against the second actuator, the relative position of the piston of the first actuator and the piston of the second actuator being indexed by indexing means;
- and
- arranging the piston of the first actuator to cooperate with the threaded rod.
Dependencies are inferred from the claim text.