Steel wire rope, elevator provided with steel wire rope, lubricant for steel wire rope, and use of lubricant for lubricating the steel wire rope

Patent metadata

Field	Value
Publication number	US-2019062993-A1
Application number	US-201816176604-A
Country	US
Kind code	A1
Filing date	Oct 31, 2018
Priority date	Jun 16, 2016
Publication date	Feb 28, 2019
Grant date	—

Abstract

A traction sheave elevator comprising such a wire rope as a suspension rope is disclosed, too.

First claim

1 . Steel wire rope comprising one or more strands composed of steel wires and a lubricant, which lubricant comprises oil and an amount of a powder substance, wherein the lubricant is in a form of paste and the powder substance in the lubricant comprises particles whose hardness is greater than 4 on the Mohs scale.

2 . Steel wire rope according to claim 1 , wherein the hardness of the particles is about equal to the hardness of the steel of the wires of the strands, or greater than the hardness of the steel of the wires of the strands.

3 . Steel wire rope according to claim 1 , wherein the ratio of the longest dimension to the shortest dimension of the particle comprised in the lubricant, i.e. the internal aspect ratio of the particle, is at most about 5, preferably the internal aspect ratio is less than 2, more preferably less than 1.5, even more preferably at most about 1.2, most preferably as close to one as possible.

4 . Steel wire rope according to claim 1 , wherein the shape of the particles is substantially spherical or almost spherical.

5 . Steel wire rope according to claim 1 , wherein the powder substance comprises particles that belong to the spinel group of minerals, which has crystal forms that are cubic or isometric, for instance octahedral.

6 . Steel wire rope according to claim 1 , wherein the powder substance comprises classified manganese (II, III) oxide, Mn 3 O 4 and/or manganese (IV) oxide, MnO 2 .

7 . Steel wire rope according to claim 6 , wherein the powder substance is classified manganese (II, III) oxide, Mn 3 O 4 and/or manganese (IV) oxide, MnO 2 .

8 . Steel wire rope according to claim 1 , wherein the particle size of at least some of the particles is greater than the asperity of the contact surface of the suspension rope and the counter contact surface of the suspension rope.

9 . Steel wire rope according to claim 1 , wherein the lubricant comprises a binder agent, the proportion of the binder agent being in the range of 0-5 weight-%, preferably in the range of 0.2-3 weight-%, even more preferably in the range of 0.3-0.6 weight-%, and more suitably about 0.4 weight-% of the amount of the lubricant.

10 . Traction sheave elevator, comprising at least an elevator car, possibly a counterweight and a plurality of suspension ropes, comprising one or more strands composed of steel wires, which ropes are led to pass over a traction sheave provided with a hoisting machine and which suspension ropes are lubricated with a lubricant that comprises at least oil, wherein the lubricant of the suspension ropes comprises powder substance, which powder substance comprises particles whose hardness is greater than 4 on the Mohs scale.

11 . Traction sheave elevator according to claim 10 , wherein the hardness of the particles is about equal to the hardness of the steel of the wires of the strands of suspension ropes, or greater than the hardness of the steel of the wires of the strands of suspension ropes.

12 . Traction sheave elevator according to claim 10 , wherein the powder substance in the lubricant of the suspension ropes of the elevator comprises particles whose internal aspect ratio, i.e. the ratio of the longest dimension to the shortest dimension of the particle comprised in the lubricant, is at most about 5, preferably the internal aspect ratio is less than 2, more preferably less than 1.5, even more preferably at most about 1.2, most preferably as close to one as possible, or which particles are substantially spherical or almost spherical.

13 . Traction sheave elevator according to claim 10 , wherein the powder substance in the lubricant of the suspension ropes of the elevator comprises particles that belong to the spinel group of minerals, which has crystal forms that are cubic or isometric, for instance octahedral.

14 . Traction sheave elevator according to claim 10 , wherein the powder substance in the lubricant of the suspension ropes of the elevator comprises classified manganese (II, III) oxide, Mn 3 O 4 and/or manganese (IV) oxide, MnO 2 .

15 . Rope lubricant for a steel wire rope, which rope comprises one or more strands composed of steel wires, and which lubricant comprises oil and powder substance, wherein the lubricant is in a form of paste and the powder substance in the lubricant comprises particles whose hardness is greater than 4 on the Mohs scale.

16 . Rope lubricant for a steel wire rope according to claim 15 , wherein the hardness of the particles is about equal to the hardness of the steel of the wires of the strands of the rope, or greater than the hardness of the steel of the wires of the strands of the rope.

17 . Rope lubricant for a steel wire rope according to claim 15 , wherein the powder substance in the lubricant comprises particles whose internal aspect ratio, i.e. the ratio of the longest dimension to the shortest dimension of the particle comprised in the lubricant, is at most about 5, preferably the internal aspect ratio is less than 2, more preferably less than 1.5, even more preferably at most about 1.2, most preferably as close to one as possible, or which particles are substantially spherical or almost spherical.

18 . Rope lubricant for a steel wire rope according to claim 15 , wherein the powder substance in the lubricant comprises particles that belong to the spinel group of minerals, which has crystal forms that are cubic or isometric, for instance octahedral.

19 . Rope lubricant for a steel wire rope according to claim 15 , wherein the powder substance in the lubricant comprises classified manganese (II, III) oxide, Mn 3 O 4 and/or manganese (IV) oxide, MnO 2 .

20 . Use of a lubricant for lubricating a rope, e.g. a steel rope, that comprises metal as a load-bearing material, which lubricant comprises at least oil and powder substance, which powder substance in the lubricant comprises particles whose hardness is greater than 4 on the Mohs scale.

21 . Use of the lubricant according to claim 20 , wherein lubricant the powder substance comprises particles whose hardness is about equal to the hardness of the steel of the wires of the strands of the rope, or greater than the hardness of the steel of the wires of the strands of the rope.

22 . Use of the lubricant according to claim 20 , wherein lubricant the powder substance comprises particles whose internal aspect ratio, i.e. the ratio of the longest dimension to the shortest dimension of the particle comprised in the lubricant, is at most about 5, preferably the internal aspect ratio is less than 2, more preferably less than 1.5, even more preferably at most about 1.2, most preferably as close to one as possible, or which particles are substantially spherical or almost spherical.

23 . Use of the lubricant according to claim 20 , wherein lubricant the powder substance comprises particles whose internal aspect ratio, i.e. the relation of the longest dimension to the shortest dimension, of the particles is between 1 and 2, preferably between 1 and 1.5, and suitably between 1 and 1.2, and most preferably as close to one as possible, or which particles are substantially spherical or almost spherical.

24 . Use of the lubricant according to claim 20 , wherein lubricant the powder substance comprises classified manganese (II, III) oxide, Mn 3 O 4 and/or manganese (IV) oxide, MnO 2 .

Assignees

• Kone Corp

Inventors

• Pelto-Huikko Raimo

Classifications

• C10N2040/32

  Wires, ropes or cables lubricants · CPC title

• C10N2020/06

  Particles of special shape or size · CPC title

• C10N2050/10

  semi-solid; greasy · CPC title

• C10N2010/14

  Group 7 · CPC title

• D07B2501/2007

  Elevators · CPC title