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US 9,038,782 B2Granted
Elevator load bearing member vibration control
AssigneeOtis Elevator Company
InventorAntoine Adrian Blanchard
Life of this patent
Estimating the term…
Abstract
An exemplary device that is useful for controlling vibrations of an elevator load bearing member includes a guide. A mass is moveable relative to the guide responsive to vibration of the load bearing member to introduce a force to counter the vibration.
Claims14
A device useful for controlling vibrations of an elevator load bearing member, comprising:
- a guide associated with a termination, the termination comprising a first spring that tensions the load bearing member;
- a mass that is moveable along the guide responsive to vibration of the load bearing member to introduce a force to counter the vibration;
- and
- a second spring associated with the mass for controlling movement of the mass, the second spring being secured to the mass at one end of the second spring, the second spring operating independent of the first spring, wherein the second spring has a stiffness that cooperates with the mass to cause the introduced force to have a selected phase and a selected frequency, the selected phase being opposite to a phase of the vibration and the selected frequency corresponding to a resonant frequency of the vibration, wherein the guide comprises a sleeve and the mass is received at least partially in the sleeve.
1 more element
An elevator system, comprising:
- an elevator car;
- a load bearing member supporting the elevator car;
- a vibration control device configured to control vibrations of the load bearing member, the vibration control device including a guide and a mass that is moveable along the guide responsive to vibration of the load bearing member to introduce a force to counter the vibration;
- and
- a termination associated with one end of the load bearing member and wherein the vibration control device is coupled with the termination, the termination comprising a first spring that tensions the load bearing member,
- wherein the vibration control device further includes a second spring associated with the mass for controlling movement of the mass, the second spring extends around the guide and is being secured to the mass at one end of the second spring, the second spring operating independent of the first spring, wherein the second spring has a stiffness that cooperates with the mass to cause the introduced force to have a selected phase and a selected frequency, the selected phase being opposite to a phase of the vibration and the selected frequency corresponding to a resonant frequency of the vibration, wherein the guide comprises a sleeve and the mass is received at least partially in the sleeve.
3 more elements
A method of controlling vibration of a load bearing member in an elevator system, comprising the steps of:
- providing a guide associated with a termination, the termination comprising a first spring that tensions the load bearing member;
- providing a mass at a location of a termination, the mass being moveable along the guide in response to vibration of the load bearing member;
- providing a second spring for controlling the movement of the mass, the second spring being secured to the mass at one end of the second spring, the second spring operating independent of the first spring;
- providing the guide with a sleeve and the mass is received at least partially in the sleeve;
- and
- controlling movement of the mass to introduce a force to counter the vibration of the load bearing member having a selected frequency and wherein the selected phase is opposite to a phase of the vibration and the selected frequency corresponds to a resonant frequency of the vibration.
3 more elements
Dependencies are inferred from the claim text.