A rotary coupling for two different fluids. The coupling includes a fixed housing and hollow shaft mounted rotatably but axially immovably in the housing. The shaft is provided with a central through-flow channel for a first fluid and at least one second through-flow channel parallel thereto for a second fluid. In the housing there are provided two separate supply channels for the two fluids and two sliding ring sealing devices between these channels and the hollow shaft, arranged coaxially with an axis of rotation of the hollow shaft, through which sealing devices the fluids can be fed separately to the through-flow channels. The first sliding ring sealing device is arranged centrally between an inner end of the hollow shaft and a housing part with the first supply channel, while the second sliding ring sealing device surrounds the hollow shaft concentrically and includes a sliding ring rotatable with the hollow shaft and has at least one radial through passage, as well as two sliding rings bearing constantly under spring pressure on its two axially facing end faces. The second sliding ring sealing device is axially movable relative to the housing and the hollow shaft. The rotatable sliding ring is fixed to an inner bush coaxially surrounding the hollow shaft, which inner bush is adapted to be coupled and uncoupled from the hollow shaft in response to an axial sliding movement of the inner bush.
A space between a housing and a rotator is hermetically sealed with a double-mechanical seal. A pair of rotary seal rings are sandwiched between a pair of stationary seal rings while sandwiching therebetween a stopper ring for inhibition of relative rotation between the rotary seal rings and the rotator. A spring is interposed in a space between the stopper and each of the rotary seal rings for pressing each rotary seal ring against the corresponding stationary seal ring.
A tool change device for manipulators, which have a rotary connection for fluidic supply lines of the tool. The rotary connection comprises a fixed part and a rotary part, whose contact plane is directed at right angles to the power take-off axis of rotation of the manipulator. The rotary and fixed parts have ring channels, which are arranged in concentric circles around the power take-off axis of rotation and open into cross channels. The rotary and fixed parts are flatly in contact with one another and are held together in the housing of the manipulator-side coupling part along the power take-off axis of rotation in an adjustable tensioning connection.
A mechanical seal rotary joint of the end-face contact type which permits slurry fluids, such as polishing solution, to pass through a fluid passage without leaking out of the relatively rotating contact area therein. The rotary joint of the present invention comprises: a first joint body (1); a second joint body (2) connected rotatably to the first joint body (1); a prime seal unit (3) provided between the opposed end portions (11, 21) of the two joint bodies (1, 2); and a continuous line of prime fluid passage (6). The prime seal unit (3) is a mechanical seal comprising: a stationary seal ring (30) fixed on the end portion (21) of the second joint body (2) concentrically with the axis of rotation as its center; a movable seal ring (31) held on the end portion (11) of the first joint body (1) and concentric with and opposite to the stationary seal ring (30); a rotation stopper (32a) provided on the outer circumferential side of the movable seal ring (31) for preventing the relative rotation of the seal ring (31) while allowing the seal ring (31) to move in the axial direction; and springs (33a) to thrust and press the movable seal ring (31) against the stationary seal ring (30). Thus, the prime seal unit (3) is constructed so as to provide a seal between the inner circumferential region (3a) and the outer circumferential region (3b) of the two seal rings (30, 31). The prime fluid passage (6) is made up of the inner circumferential regions (3a) of the two seal ring (30, 31), a first primary passage section (60) passing through the first joint body (1) and leading into the inner circumferential region (3a) and a second prime fluid passage section (61) passing through the second joint body (2) and leading into the inner circumferential region (3a). A slurry fluid (106), such as a polishing solution, flows through the prime fluid passage (6) without leaking out of the relatively rotating section of the joint bodies (1, 2).
A connector arranged for high pressure fluid carrying conduits comprises a central core having at least one fluid passage such as an integral bore, formed therein and an outer member surrounding the central core and being moveable relative thereto. The outer member comprising at least one segment having a fluid flow conduit and sealing means for the connector junction comprising an intermediate member, at least one static seal for non-moveable surfaces and at least one dynamic seal for relatively moveable surface. A plurality of segments may be stacked on top of each other and held together by the application of a compression force on shoulders of the segments. A relative rotational capability is preserved for the parts of the connector yet a more reliable and versatile connector is achieved in which the modular construction allows a variety of sizes to be offered more easily and cheaply and engineering tolerances can be more easily be met than with a single piece construction.
Arrangement for a tool spindle with a pulling rod (3) axially displaceable in the spindle axle (1) for firmly attaching a tool at the spindle of the tool whereby the end of the pulling rod (3) that is opposite to the tool is accommodated in a stationary unit (4), the rotating part (1, 3) is provided with a piston (11) movably displaceable in a cylinder chamber (13) arranged in the spindle axle (1), the pulling rod (3) has at least one first axial bore (12a) opening into the cylinder chamber on one side of the piston (11) and at least one second (12b) axial bore opening into the cylinder chamber on the other side of the piston (11), the stationary unit (4) is provided with an inlet (16) in communication with the first bore (12a) and an inlet (14) in communication with the second bore (12 b). The bores (12a, 12b) can be put under pressure or respectively relieved of pressure via inlet (16, 14) from a fluid for displacing the piston (11) in one of the directions depending on the desired displacement of the piston (11) and thereby the pulling rod (3) from a releasing to an attaching position and back again. Gap sealings that separate the rotating part (1, 3) from the stationary unit (4) are arranged on either side of the respective inlet (14, 16) thereby forming a dynamic bearing during the rotation of the rotating part due to the leakage of the fluid through the gap sealings.
