Abstract:
A lift assembly system and method can include: a funnel-shaped drum having a constant diameter portion and a gradually increasing diameter portion; a cable management system adapted to position a cable in a single layer in a tray; a beam clamp tube receiver adapted to allow a tube to slide relative to a beam and be secured to the beam; a cable keeper and a slack line detector adapted to maintain cables in position about a drum upon loss of cable tension; a horizontally oriented low profile cable adjuster adapted to adjust the length of a cable; an overspeed braking mechanism; a fleet pivot arm pivotable on the end of a tube so as to guide cables along a desired fleet angle; and/or a pull-type load sensor connected between a tube and a drum adapted to sense changes in a load force and adjust movement of a load.
Abstract:
A drawworks (10) comprising a permanent magnet motor (60) mounted inside a drum(40), said permanent magnet motor arranged to drive said drum via a gear system(50), characterised in that said gear system is located at least partially within said drum.
Abstract:
The invention relates to the monitoring of a brake (400, 500). The brake (400, 500) comprises first and second braking surfaces (204, 206) and magnetizing means (210) arranged to move the braking surfaces (204, 206) to an open state, in which the braking surfaces (204, 206) are separated from each other, and to a closed state, in which the braking surfaces (204, 206) are connected to each other. During the monitoring of the brake (400, 500), the time is measured that elapses from the change in the magnetic field caused by the magnetizing means (210) to the shift of the braking surfaces (204, 206) from one state to another.
Abstract:
The invention relates to a friction brake (1), in particular for elevators, comprising at least two pivotably arranged brake levers (2), which each have a brake lining (6) and are arranged opposite each other in the form of a pair of brake tongs. An actuator (5) is provided for actuating the friction brake (1). In order to avoid uneven loading of the brake levers (2) lying opposite each other, the actuator (5) is designed in such a way that the force (FA) exerted by the actuator (5) acts substantially perpendicularly to a brake application force (Fz) exerted by the brake levers (5). Furthermore, a spreading mechanism (9, 26) is provided, by means of which the brake application force (Fz) can be regulated by the force (FA) exerted by the actuator.
Abstract:
The invention relates to a load-compensating rope sheave arrangement for drum winders, comprising at least two rope sheaves which are vertically guided in sliding frames and mounted on hydraulically short-circuited cylinders. Multiply redundant monitoring of the different sheave loads acting upon the rope sheaves is carried out via the hydraulic cylinders which are connected to the system control of the drum winder for communication.
Abstract:
The invention relates to the monitoring of a brake (400, 500). The brake (400, 500) comprises first and second braking surfaces (204, 206) and magnetizing means (210) arranged to move the braking surfaces (204, 206) to an open state, in which the braking surfaces (204, 206) are separated from each other, and to a closed state, in which the braking surfaces (204, 206) are connected to each other. During the monitoring of the brake (400, 500), the time is measured that elapses from the change in the magnetic field caused by the magnetizing means (210) to the shift of the braking surfaces (204, 206) from one state to another.
Abstract:
A lift assembly system and method can include: a funnel-shaped drum having a constant diameter portion and a gradually increasing diameter portion; a cable management system adapted to position a cable in a single layer in a tray; a beam clamp tube receiver adapted to allow a tube to slide relative to a beam and be secured to the beam; a cable keeper and a slack line detector adapted to maintain cables in position about a drum upon loss of cable tension; a horizontally oriented low profile cable adjuster adapted to adjust the length of a cable; an overspeed braking mechanism; a fleet pivot arm pivotable on the end of a tube so as to guide cables along a desired fleet angle; and/or a pull-type load sensor connected between a tube and a drum adapted to sense changes in a load force and adjust movement of a load.
Abstract:
A drawworks (10) comprising a permanent magnet motor (60) mounted inside a drum(40), said permanent magnet motor arranged to drive said drum via a gear system(50), characterised in that said gear system is located at least partially within said drum.