Elevator with traction sheave

• US 8,556,041 B2
• Filed: 04/13/2010
• Issued: 10/15/2013
• Est. Priority Date: 01/09/2002
• Status: Expired due to Fees

• Current Assignee: Kone Corporation
• Original Assignee: Kone Corporation
• Inventors: Mustalahti, Jorma, Aulanko, Esko
• Primary Examiner(s): Rivera, William A
• Assistant Examiner(s): Kruer, Stefan
• Application Number:
  US12/662,353
• Publication Number:
  US 20100200337A1
• Time in Patent Office: 1,281 Days
• Field of Search: 187250-254, 187261-266, 187/393, 187/404, 187/255, 474/205, 474/239, 474260-272, 254/390, 254/391
• US Class Current: 187/254
• CPC Class Codes: B66B 11/008 with hoisting rope or cable operated by frictional engagement with a winding drum or sheave
• CPC Class Codes: B66B 11/009 with separate traction and suspension ropes
• CPC Class Codes: B66B 11/08 with hoisting rope or cable operated by frictional engagement with a winding drum or sheave B66B11/008 takes precedence
• CPC Class Codes: B66B 15/04 Friction sheaves; "Koepe" pulleys
• CPC Class Codes: B66B 7/06 Arrangements of ropes or cables
• CPC Class Codes: D07B 1/0673 having a rope configuration
• CPC Class Codes: D07B 1/16 Ropes or cables with an enveloping sheathing or inlays of rubber or plastics D07B1/04, D07B1/10 take precedence
• CPC Class Codes: D07B 2201/2006 characterised by a value or range of the dimension given
• CPC Class Codes: D07B 2501/2007 Elevators
• CPC Class Codes: Y10T 74/18848 with pulley

Abstract

An elevator includes a set of hoisting ropes supporting a counterweight and an elevator car moving on respective tracks, each hoisting rope having a substantially round cross-section, and a hoisting machine engaging the set of hoisting ropes via a traction sheave. The traction sheave has a plurality of rope grooves. Each of the plurality of rope grooves generally conforms to a substantially circular shape. Each of the plurality of rope grooves has an opening for receiving a hoisting rope from among the set of hoisting ropes. A coating is adhesively bonded to each of the plurality of rope grooves. Each hoisting rope has a diameter below 8 mm. Each hoisting rope is composed of steel wires having a strength exceeding 2000 N/mm². A contact angle between the set of hoisting ropes and the traction sheave is greater than about 180 degrees.

Claims

1. An elevator, comprising:

a set of hoisting ropes supporting a counterweight and an elevator car moving on respective tracks, each hoisting rope having a substantially round cross-section; and

a hoisting machine engaging the set of hoisting ropes via a traction sheave;

wherein the traction sheave has a plurality of rope grooves,

wherein each of the plurality of rope grooves generally conforms to a substantially circular shape,

wherein each of the plurality of rope grooves has an opening for receiving a hoisting rope from among the set of hoisting ropes,

wherein a width of the opening is less than a diameter of a respective rope groove,

wherein a coating is adhesively bonded to each of the plurality of rope grooves,

wherein in each rope groove, the coating has a crescent-shaped cross-section,

wherein each hoisting rope has a diameter below 8 mm,

wherein each hoisting rope is composed of steel wires having a strength exceeding 2000 N/mm², and

wherein a contact angle between the set of hoisting ropes and the traction sheave is greater than about 180 degrees.

2. The elevator of claim 1, wherein there is a continuous contact angle of greater than about 180 degrees between the traction sheave and the set of hoisting ropes.

3. The elevator of claim 1, wherein the contact angle on the traction sheave includes 2 or more parts.

4. The elevator of claim 1, wherein the traction sheave is roped using one of extended wrap roping, double wrap roping, and X wrap roping.

5. The elevator of claim 1, wherein the counterweight is suspended with a suspension ratio of n:

1,

wherein the elevator car is suspended with a suspension ratio of m;

1,

wherein m is an integer greater than or equal to 1, and

wherein n is an integer greater than or equal to m.

6. The elevator of claim 1, further comprising:

an overspeed governor having a rope with a diameter that is greater than or equal to the diameter of each hoisting rope.

7. The elevator of claim 1, wherein the counterweight is suspended with a suspension ratio of n:

1,

wherein the elevator car is suspended with a suspension ratio of m;

1,

wherein m is an integer greater than 1, and

wherein n is an integer greater than or equal to m.

8. The elevator of claim 1, wherein the counterweight is suspended with a suspension ratio of n:

1,

wherein the elevator car is suspended with a suspension ratio of m;

1,

wherein m is an integer greater than or equal to 1, and

wherein n is an integer greater than m.

9. The elevator of claim 1, wherein the counterweight is suspended with a suspension ratio of m:

1,

wherein the elevator car is suspended with a suspension ratio of m;

1, and

wherein m is an integer greater than or equal to 1.

10. The elevator of claim 1, wherein the counterweight is suspended with a suspension ratio of m:

1,

wherein the elevator car is suspended with a suspension ratio of m;

1, and

wherein m is an integer greater than 1.

11. An elevator, comprising:

a set of hoisting ropes supporting a counterweight and an elevator car moving on respective tracks, each hoisting rope having a substantially round cross-section; and

a hoisting machine engaging the set of hoisting ropes via a traction sheave;

wherein the traction sheave has a plurality of rope grooves,

wherein each of the plurality of rope grooves generally conforms to a substantially circular shape,

wherein each of the plurality of rope grooves has an opening for receiving a hoisting rope from among the set of hoisting ropes,

wherein a width of the opening is less than a diameter of a respective rope groove,

wherein a coating is adhesively bonded to each of the plurality of rope grooves,

wherein each hoisting rope has a diameter below 8 mm,

wherein each hoisting rope is composed of steel wires having a strength exceeding 2000 N/mm², and

wherein a contact angle between the set of hoisting ropes and the traction sheave is greater than about 180 degrees.

12. The elevator of claim 11, wherein there is a continuous contact angle of greater than about 180 degrees between the traction sheave and the set of hoisting ropes.

13. The elevator of claim 11, wherein the contact angle on the traction sheave includes 2 or more parts.

14. The elevator of claim 11, wherein the traction sheave is roped using one of extended wrap roping, double wrap roping, and X wrap roping.

15. The elevator of claim 11, wherein the counterweight is suspended with a suspension ratio of n:

1,

wherein the elevator car is suspended with a suspension ratio of m;

1,

wherein m is an integer greater than or equal to 1, and

wherein n is an integer greater than or equal to m.

16. The elevator of claim 11, further comprising:

an overspeed governor having a rope with a diameter that is greater than or equal to the diameter of each hoisting rope.

17. The elevator of claim 11, wherein the counterweight is suspended with a suspension ratio of n:

1,

wherein the elevator car is suspended with a suspension ratio of m;

1,

wherein m is an integer greater than 1, and

wherein n is an integer greater than or equal to m.

18. The elevator of claim 11, wherein the counterweight is suspended with a suspension ratio of n:

1,

wherein the elevator car is suspended with a suspension ratio of m;

1,

wherein m is an integer greater than or equal to 1, and

wherein n is an integer greater than m.

19. The elevator of claim 11, wherein the counterweight is suspended with a suspension ratio of m:

1,

wherein the elevator car is suspended with a suspension ratio of m;

1, and

wherein m is an integer greater than or equal to 1.

20. The elevator of claim 11, wherein the counterweight is suspended with a suspension ratio of m:

1,

wherein the elevator car is suspended with a suspension ratio of m;

1, and

wherein m is an integer greater than 1.

21. An elevator, comprising:

a set of hoisting ropes supporting a counterweight and an elevator car moving on respective tracks, each hoisting rope having a substantially round cross-section; and

a hoisting machine engaging the set of hoisting ropes via a traction sheave;

wherein the traction sheave has a plurality of rope grooves,

wherein each of the plurality of rope grooves generally conforms to a substantially circular shape,

wherein each of the plurality of rope grooves has an opening for receiving a hoisting rope from among the set of hoisting ropes,

wherein a coating is adhesively bonded to each of the plurality of rope grooves,

wherein in each rope groove, the coating has a crescent-shaped cross-section,

wherein each hoisting rope has a diameter below 8 mm,

wherein each hoisting rope is composed of steel wires having a strength exceeding 2000 N/mm², and

wherein a contact angle between the set of hoisting ropes and the traction sheave is greater than about 180 degrees.

22. The elevator of claim 21, wherein there is a continuous contact angle of greater than about 180 degrees between the traction sheave and the set of hoisting ropes.

23. The elevator of claim 21, wherein the contact angle on the traction sheave includes 2 or more parts.

24. The elevator of claim 21, wherein the traction sheave is roped using one of extended wrap roping, double wrap roping, and X wrap roping.

25. The elevator of claim 21, wherein the counterweight is suspended with a suspension ratio of n:

1,

wherein the elevator car is suspended with a suspension ratio of m;

1,

wherein m is an integer greater than or equal to 1, and

wherein n is an integer greater than or equal to m.

26. The elevator of claim 21, further comprising:

an overspeed governor having a rope with a diameter that is greater than or equal to the diameter of each hoisting rope.

27. The elevator of claim 21, wherein the counterweight is suspended with a suspension ratio of n:

1,

wherein the elevator car is suspended with a suspension ratio of m;

1,

wherein m is an integer greater than 1, and

wherein n is an integer greater than or equal to m.

28. The elevator of claim 21, wherein the counterweight is suspended with a suspension ratio of n:

1,

wherein the elevator car is suspended with a suspension ratio of m;

1,

wherein m is an integer greater than or equal to 1, and

wherein n is an integer greater than m.

29. The elevator of claim 21, wherein the counterweight is suspended with a suspension ratio of m:

1,

wherein the elevator car is suspended with a suspension ratio of m;

1, and

wherein m is an integer greater than or equal to 1.

30. The elevator of claim 21, wherein the counterweight is suspended with a suspension ratio of m:

1,

wherein the elevator car is suspended with a suspension ratio of m;

1, and

wherein m is an integer greater than 1.