Elevator dampener and energy harvesting device and method

• US 10,005,641 B2
• Filed: 06/16/2015
• Issued: 06/26/2018
• Est. Priority Date: 06/17/2014
• Status: Active Grant

• Current Assignee: ThyssenKrupp Elevator Corporation (Thyssenkrupp AG)
• Original Assignee: ThyssenKrupp Elevator Corporation (Thyssenkrupp AG)
• Inventors: Smith, Rory S.
• Primary Examiner(s): Gannon, Levi
• Application Number:
  US14/740,324
• Publication Number:
  US 20150360909A1
• Time in Patent Office: 1,106 Days
• Field of Search: 310339
• CPC Class Codes: B66B 1/34 Details , e.g. call counting devices, data transmission from car to control system, devices giving information to the control system
• CPC Class Codes: B66B 7/048 including passive attenuation system for shocks, vibrations
• CPC Class Codes: B66B 7/06 Arrangements of ropes or cables
• CPC Class Codes: F16F 15/005 using electro- or magnetostrictive actuation means generating of mechanical vibrations operating with electrostriction B06B1/06, with magnetostriction B06B1/08; vehicle suspension arrangements characterised by use of piezoelectric elements B60G17/01941; piezoelectric, electrostrictive and magnetostrictive devices per se H10N30/00
• CPC Class Codes: F16F 2224/0241 Fibre-reinforced plastics [FRP]
• CPC Class Codes: F16F 7/104 the inertia member being resiliently mounted F16F7/1022 takes precedence
• CPC Class Codes: H02N 2/181 Circuits; Control arrangements or methods
• CPC Class Codes: H02N 2/186 Vibration harvesters

Abstract

A vibration dampening device is operable to dampen vibrations within ropes of an elevator car or other components to improve ride quality, and is further operable to harness or harvest and convert energy from those vibrations into electrical energy. The dampening device includes a macro-fiber composite and the vibrations are communicated or transmitted to the macro-fiber composite. The macro-fiber composite is operable to harness or harvest and convert energy from vibrations into electrical energy. Such electrical energy is communicated or transmitted to a control system of the elevator car for storage and/or use.

Claims

1. An apparatus for dampening vibrations within an elevator system and producing electrical energy from the kinetic energy of the vibrations, the apparatus comprising:

an elongate member coupled to at least one hoisting rope of the elevator system;

a macro-fiber composite connected with the elongate member, wherein the macro-fiber composite comprises a plurality of piezoceramic fibers and an epoxy operable to dampen vibrations within the at least one hoisting rope and convert kinetic energy from the vibrations into electrical energy;

a control system in electrical communication with the macro-fiber composite, wherein the electrical energy produced from the kinetic energy from the vibrations is transmitted from the macro-fiber composite to the control system; and

an energy storage device that receives the electrical energy from the macro-fiber composite.

2. The apparatus of claim 1, wherein the control system is operable to use the electrical energy to control operation of at least one component of an elevator car.

3. The apparatus of claim 1, wherein the elongate member comprises one or more rod members in direct contact with and connected with the at least one hoisting rope.

4. The apparatus of claim 3, wherein the macro-fiber composite is secured to a select one of the one or more rod members.

5. The apparatus of claim 1, wherein the macro-fiber composite is in direct contact with the at least one hoisting rope.

6. The apparatus of claim 1, wherein the apparatus further comprises a weight secured to the elongate member.

7. The apparatus of claim 1, wherein the macro-fiber composite is electrically coupled with the control system via a cable.

8. The apparatus of claim 1, wherein the energy storage device comprises a battery.

9. The apparatus of claim 1, wherein the energy storage device comprises a super capacitor.

10. An apparatus for providing energy to an elevator car, the apparatus comprising:

an energy harvesting device, wherein the energy harvesting device is in at least indirect communication with a select one or both of at least one hoisting rope and the elevator car sling, wherein the energy harvesting device is operable to convert kinetic energy from vibrations to electrical energy;

a control system operable to control operation of at least one component of the elevator car using at least a portion of the electrical energy provided by the energy harvesting device to the control system; and

an energy storage device operable to receive and store electrical energy from the energy harnessing device.

11. The apparatus of claim 10, wherein the energy harvesting device is further operable to dampen vibrations within the at least one hoisting rope.

12. The apparatus of claim 11, wherein the energy harvesting device comprises a tuned mass dampener having a macro-fiber composite.

13. The apparatus of claim 10, wherein the energy harvesting device is further operable to dampen vibrations within the elevator car sling.

14. The apparatus of claim 13, wherein the energy harvesting device comprises at least one isolation pad having a macro-fiber composite.

15. A method of providing energy to an elevator car, comprising the steps of:

connecting a dampening and energy harvesting device to at least one rope of the elevator car, wherein the dampening and energy harvesting device comprises a macro-fiber composite in communication with the at least one rope;

converting vibrational motion from the at least one rope into electrical energy using the macro-fiber composite;

transmitting the electrical energy to a control system via an electrical cable connecting the control system to the macro-fiber composite, wherein the step of transmitting the electrical energy to the control system comprises directing the electrical energy to an energy storage device; and

distributing the electrical energy from the control system to the elevator car.

16. The method of claim 15, further comprising the step of dampening vibrational motion within the at least one rope.