JP2006274037A - Lubricating oil for use in wire rope, wire rope, and rope-type elevator apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lubricating oil for use in wire ropes which is capable of preventing the reduction in the lubrication function and is capable of preventing the solidification into a massive form. <P>SOLUTION: The lubricating oil for use in wire ropes which is impregnated between the core cable 9 and strands 10 of wire ropes 6, 7 and have a mass fraction of polycyclic aromatics of less than 1%, is characterized in that this lubricating oil has a mass fraction of sulfur of less than 0.5% and contains an antioxidant for preventing the oxidation of the lubricating oil in a mass fraction of 0.05-1.5%. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a wire rope lubricant, a wire rope, and a rope type elevator apparatus using the wire rope lubricant.

  FIG. 1 is a schematic view of a commonly used rope type elevator apparatus. In FIG. 1, a governor used for a main rope wire rope 6 and a governor 5 for driving a counterweight 1 and a car 1. Wire rope 7 is used. FIG. 2 shows a sectional structure diagram of each of the wire ropes 6 and 7. The wire rope 6 for main rope is repeatedly bent and deformed when driven by the sheave 3 and the deflector 4 and, at this time, the adjacent strands 10 are repeatedly rubbed against each other, so that lubricating oil is necessary to prevent wear. . The governor wire rope 7 is also repeatedly bent and deformed by the pulley, and at this time, the adjacent strands 10 are repeatedly rubbed against each other, so that lubricating oil is necessary to prevent wear.

  In general, the lubricating oil is used by being impregnated between the core rope 9 and the strand 10.

  In general, each component of the lubricating oil naturally contains polycyclic aromatics (hereinafter referred to as PCA), but this PCA is considered to be harmful to the human body and now constitutes lubricating oil. It is recommended that the mass ratio of PCA in each component such as wax and oil be less than 3%, preferably less than 1%, and it is practically used.

  However, recently, there has been a problem that the wire rope using the lubricating oil is rusted and the strands are cut. As a result of repeatedly investigating the cause of this, it was found that the mass ratio of PCA is high in nature, especially in the oil content. It has been found that the mass ratio of sulfur contained in the oil decreases when the ratio is increased. As a result, it has been found that the function of the lubricating oil, which has not occurred so far, is deteriorated, the problem of the supply period of the lubricating oil being shortened, and the life of the wire rope being shortened. It has also been found that there are cases where the lubricating oil is agglomerated and solidified on the surface of the wire rope, causing problems such as malfunction of the governor.

  An object of the present invention is to provide a wire rope lubricant, a wire rope, and a rope-type elevator device using the wire rope lubricant that can prevent a decrease in the function of lubrication and prevent solidification into a lump. It is in.

  In the present invention, in order to achieve the above object, in a wire rope lubricating oil impregnated between the rope rope core and strands and having a polycyclic aromatic mass ratio of less than 1%, the sulfur mass ratio is 0.5. And an antioxidant that prevents oxidation of the lubricating oil is contained in an amount of 0.05 to 1.5% by mass.

  According to the present invention, while the wire rope has a PCA mass ratio of less than 1% in the lubricating oil, it is possible to lengthen the lubricating oil supply cycle or the wire rope replacement cycle, greatly improving maintainability. Can be improved. In addition, the malfunction and failure of the apparatus due to solidification by forming a lump on the surface of the wire rope is eliminated, and a highly reliable wire rope lubricating oil can be provided.

  Furthermore, the reliability or lifetime of the wire rope or rope type elevator can be improved. Moreover, since the replacement frequency of the rope in the rope type elevator can be reduced, maintenance is facilitated.

  Embodiments of the present invention will be described based on the experimental results shown in Tables 1 and 2.

Table 1 shows the components of the sample.

  In the table, A is a PCA mass ratio of 3.10% and a sulfur mass ratio of 0.84%, and assumes a state in which the degree of purification of the oil content in the lubricating oil is not increased. B is a mass ratio of PCA of 0.58% and a mass ratio of sulfur of 0.16%, C is a mass ratio of PCA of 0.58%, a mass ratio of sulfur is 0.16%, phenol Although the mass ratio of the system antioxidant is 0.30%, C and B are assumed to have increased the degree of purification of the oil content in the lubricating oil. An antioxidant is added, which corresponds to an invention product.

  Examples of the phenolic antioxidant include 2,6-di-tert-butyl-p-cresol, 2,6-di-tert-butyl-phenol, 2,4-di-methyl-6-tert. Butyl-phenol, tert-butylhydroxyanisole, 2,2'-methylenebis (4-methyl-6-tert-butylphenol), 4,4'-methylenebis (2,3-di-tert-butylphenol), 4,4 ' -Bitilidenebis (3-methyl-6-tert-butylphenol), 4,4'-thiobis (3-methyl-6-tert-butylphenol), tetrakis [methylene-3 (3,5-di-tert-butyl-4-) Hydroxyphenyl) propionate] methane, 1,1,3-tris (2-methyl-4-hydroxy-5-tert-butylphenyl) butane, and the like. When an amine-based antioxidant is added, for example, phenyl-β-naphthylamine, α-naphthylamine, N, N′-di-secondary butyl-p-phenylenediamine, phenothiazine, N, N′-diphenyl -p-phenylenediamine, 4,4′-tetramethyl-di-aminodiphenylmethane, N-phenyl-α-naphthylamine, phenothiazine, lecithin and the like.

  In addition, in the supply of the above-described embodiment, data on the phenol-based antioxidant is shown, but it goes without saying that the amine-based antioxidant has the same effect.

  In order to confirm the oxidation stability of each lubricating oil for the samples A to C, a forced oxidation test was performed.

The test results are shown in Table 2.

  In this test, iron powder and cement powder, which are substances that are generated in the environment where the elevator apparatus is installed and promote the oxidation of the lubricating oil, were mixed as contaminants in the test sample, and the test was conducted. The mixing amount of iron powder and cement powder was 15% iron + 15% cement (PH12-13), and the test conditions were air blown amount 0.3L / min, held at 120 ° C or 140 ° C for 100h and tested. . The degree of oxidation was measured by analyzing CH groups and CO groups with an infrared spectroscopic analyzer and calculating the ratio (CO / CH). Since supply B has a higher degree of oxidation than supply A and the mass ratio of PCA and sulfur is low, it can be seen that the oxidation stability is low. On the other hand, it can be seen that the supply C containing the antioxidant is clearly higher in oxidation stability than the supply B and is superior to the supply A.

  From the above test results, the product C has a PCA with a mass ratio of less than 1% and sulfur with a mass ratio of less than 0.5%, but the antioxidant has a PCA mass ratio of 3.10% and a sulfur mass ratio of 0.1. Performance equal to or better than that of 84% can be realized, and problems can be solved.

  In addition, although what made the mass ratio 0.30% was illustrated as antioxidant material, As this content, it can be 0.05-1.5%. That is, at 0.05% or less, the degree of oxidation could not be reduced below the supply A. Further, if the ratio is 1.5% or more, the coefficient of friction becomes high, causing a problem that stable driving cannot be performed.

  In order to obtain a more stable lubricating oil, it is optimal to contain an antioxidant in an amount of 0.2 to 0.5% by mass.

  In addition to the above antioxidants, in order to increase the stability of the lubricating oil, it is possible to add ultraviolet absorbers and light stabilizers, metal deactivators, sulfur-based antioxidants, phosphorus-based antioxidants, and the like. it can. Examples of the ultraviolet absorber and light stabilizer include phenyl salicylate, monoglycol salicylate, p-tert-butylphenyl salicylate, 2-hydroxy-4-methoxybenzophenone, 2-hydroxy-4-octoxy Benzophenone, 2 (2'-hydroxy-5'-methylphenyl) benzotriazole, 2 (2'-hydroxy-3 ', 5'-di-tert-butylphenyl) benzotriazole, 2 (2'-hydroxy-3' -Di-tert-butyl-5'-methylphenyl) benzotriazole, resorcinol monobenzoate, 2'-ethylhexyl-2-cyano-3-phenylcinnamate, bis (2,2,6,6-tetramethyl-4- Piperidine) sebacate and the like. Examples of metal deactivators include N-salicyloyl-N′-aldehyde hydrazine, N-salicyloyl-N′-acetylhydrazine, N, N′-diphenyl-oxamide, N, N′-di (2-hydroxyphenyl) Oxamide etc. are mentioned. Examples of the sulfur-based antioxidant include dilauryl thiodipropionate, distearyl thiodipropionate, lauryl stearyl thiodipropionate, dimyristyl thiodipropionate, distearyl β, β′-thiodibutyrate, 2-mercaptobenzimidazole, dilauryl sulfide, zinc dialkyldithiophosphate, zinc diallyldithiophosphate and the like. Examples of the phosphorus antioxidant include triphenyl phosphite, trioctadecyl phosphite, tridecyl phosphite, trilauryl trithiophosphite, and the like.

  In addition, the structural example of the wire rope by which this invention is implemented is the same as that of what was shown in FIG. 2, and the lubricating oil of the said embodiment is impregnated between the core rope 9 and the strand 10. Moreover, the structural example of the rope type elevator in which the present invention is implemented is the same as that shown in FIG. 1, as the main rope wire rope 6 and the governor wire rope 7, or as one of them. A wire rope impregnated with the lubricating oil of the embodiment is used.

It is the schematic of the rope type elevator apparatus normally used. It is a cross-section figure of a wire rope.

Explanation of symbols

1 basket 2 counterweight 3 sheave,
4 Bending wheel 5 Speed governor 6 Wire rope for main rope 7 Wire rope for speed governor 9 Core rope 10 Wire

Claims (6)

In wire rope lubricating oil impregnated between wire rope core and strands and having a polycyclic aromatic mass ratio of less than 1%,
A lubricating oil for wire rope, wherein the sulfur mass percentage is less than 0.5% and an antioxidant that prevents oxidation of the lubricating oil is contained in an amount of 0.05 to 1.5% by mass percentage.   The wire rope lubricating oil according to claim 1, wherein the antioxidant is contained in an amount of 0.2 to 0.5% by mass.   3. The wire rope lubricating oil according to claim 1 or 2, wherein the antioxidant is a phenolic antioxidant.   3. The wire rope lubricating oil according to claim 1, wherein the antioxidant is an amine-based antioxidant. In a wire rope impregnated with a lubricating oil having a polycyclic aromatic mass ratio of less than 1% between the heart rope and the strands,
The lube oil has a sulfur mass ratio of less than 0.5% and contains an antioxidant that prevents oxidation of the lubricating oil in a mass ratio of 0.05 to 1.5%. It is equipped with a main rope wire rope that drives the car and the counterweight or a wire rope used in the governor, impregnated between the rope and strands of this wire rope, and the mass ratio of polycyclic aromatic is less than 1% In the rope type elevator device using the lubricating oil for wire rope,
The wire rope lubricating oil has a sulfur mass ratio of less than 0.5% and contains an antioxidant that prevents oxidation of the lubricating oil in a mass ratio of 0.05 to 1.5%. Rope type elevator equipment using lubricating oil for wire rope.

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