Elevator installation and a method for lubricating bearings in the elevator installation
AssigneeInventio AG
InventorUrs Ammon
Life of this patent
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Abstract
An elevator installation and a method for lubricating bearings in an elevator hoist machine of the elevator installation ensure that during start-up and subsequent running of the elevator hoist machine the bearings are provided with a mixed film lubrication or an elastohydrodynamic lubrication to optimize bearing life expectation.
Claims13
An elevator installation having an elevator controller, a drive and a hoist machine, the hoist machine comprising:
- a traction sheave;
- an electric motor rotating the traction sheave in response to signals from the drive;
- a brake for braking the traction sheave;
- at least one bearing supporting the traction sheave;
- a lubrication device automatically transmitting oil to the at least one bearing upon receipt of a brake release signal from the drive or from the controller;
- and
- wherein the brake is hydraulically released from braking the traction sheave and including a pump and a solenoid valve whereby the pump is activated by the brake release signal to deliver pressurized fluid from a reservoir to the solenoid valve and the solenoid valve is activated by a further brake release signal to deliver the pressurized fluid to the brake to hydraulically release the brake.
A method for oil lubrication of at least one bearing in an elevator hoist machine comprising the steps of:
- monitoring for generation of an elevator brake release signal by an elevator controller or a drive associated with the hoist machine;
- delivering oil to the at least one bearing when the elevator brake release signal has been detected;
- and
- delivering the oil to the at least one bearing for a preset time duration, or until a signal generated from a brake contact confirms that an elevator brake of the hoist machine is open, or until a further brake release signal generated by the elevator controller or the drive is detected, or stopping the delivery of the oil to the at least one bearing before the elevator hoist machine starts to rotate a traction sheave.
A method for oil lubrication of a bearing in an elevator hoist machine, the method comprising the steps of:
- providing a lubrication device adapted to deliver oil to the bearing of the hoist machine;
- monitoring for a generation of an elevator brake release signal by an elevator controller or a drive, the elevator controller and the drive being associated with the hoist machine;
- delivering oil from the lubrication device to the bearing in response to the detection of the elevator brake release signal;
- and
- delivering the oil to the bearing for a preset time duration, or until a signal generated from a brake contact confirms that an elevator brake of the hoist machine is open, or until a further brake release signal generated by the elevator controller or the drive is detected, or stopping the delivery of the oil to the bearing before the elevator hoist machine starts to rotate a traction sheave.
Dependencies are inferred from the claim text.