JP4730885B2 - lubricant - Google Patents

Description

  The present invention is mounted on a traveling body that travels on a rail such as a traveling crane, prevents the wear of the side surface of the rail and the wheel flange surface of the traveling body, and reduces the contact resistance of the sliding surface. The present invention relates to a lubricant used for a traveling body for smoothly traveling the traveling body, and more particularly to a paste-like lubricant filled in a solid lubricant container.

  Dust and mist are on the top surface of the rail when using traveling cranes, trolleys, and other traveling bodies that run on rails used in places where dust and mist are generated, such as cement factories, steel factories, coal storage, and scrap factories In some cases, the wheels of the traveling body slip due to the deposits or deposits. In particular, if only one of the wheels slips, a meandering force acts on the traveling body, which may cause damage to the rails and wheels.

  Therefore, it is necessary to always clean the rail and prevent wear of the side surface of the rail and the wheel flange surface of the traveling body, reduce the contact resistance of the sliding surface, and smoothly travel the traveling body. Various types of systems have been proposed in which a lubricant application device is attached to the rail, and the side surface of the rail and the wheel flange surface lubricant of the traveling body are applied during traveling of the traveling body.

For example, Japanese Utility Model Publication Nos. 47-22304 and 48-13814 describe molded products obtained by kneading a solid lubricant such as graphite and molybdenum disulfide using a synthetic wax and a thermoplastic synthetic resin as a binder. Yes.
Japanese Utility Model Publication No. 49-3912 discloses a solid lubricant in which a hard lubricant such as molybdenum disulfide is formed in the outer layer and a soft lubricant is formed in the inner layer.
Japanese Utility Model Publication No. 47-22304 Japanese Utility Model Publication No. 48-13814 Japanese Utility Model Publication No. 49-3912

  These solid lubricants only form a dry dry film using graphite, molybdenum disulfide, tungsten disulfide, etc., as a binder, with molten synthetic wax, thermoplastic synthetic resin, etc. There is a drawback that the side surface and the wheel flange surface of the traveling body are not closely attached, and the adhesion to the metal is not good, and a sufficient lubrication film even when rubbing against a sliding surface such as a metal rail or wheel flange Is not used at all because it is not formed.

On the other hand, a structure in which a lubricant such as grease is sealed in a paraffin outer cylinder is described in Japanese Utility Model Laid-Open Nos. 51-137084 and 54-41905.
Japanese Utility Model Publication No. 51-137084 Japanese Utility Model Publication No. 54-41905

However, the lubricant of Patent Document 4 is provided with partition walls for preventing breakage of the lubricating rod, flow of grease from the hard lubricant and obtaining strength, and filling each partition wall with fluid grease containing oil. Because it is a solid lubricant, it is difficult to manufacture partition walls, and it is not always difficult to insert and seal grease etc. into each partition wall, and it is necessary for the sealing process in the final process after injection. There is a disadvantage that it is costly to include the technology.
In addition, the lubricant disclosed in Patent Document 5 has a problem in that it is difficult to apply a technique in which a paraffin wall is attached to the inner surface of each chamber of a graphite container and grease is filled therein, resulting in high costs.

In addition, a paste in which a synthetic lubricant such as graphite and molybdenum disulfide is kneaded with a synthetic synthetic wax in the outer cylinder and a solid lubricant such as graphite and molybdenum disulfide is kneaded with lubricating oil or grease and a solid lubricant such as graphite and molybdenum disulfide. Japanese Utility Model Publication No. 55-9622 discloses a solid lubricant in which capsules containing bismuth are dispersed.
Japanese Utility Model Publication No. 55-9622

  However, in the manufacturing process of this solid lubricant, when a capsule containing a sufficient oil content with adhesiveness is poured into a hard solid lubricant (melting temperature 75 ° C.) dissolved in advance into an actual mold. Disperse capsules containing oil in a high temperature of 110 to 130 ° C. while uniformly stirring them, so that the coating on the outer surface of the capsules is thin, and the molding mold is injected while stirring in terms of temperature. The film softens and breaks due to temperature, and the oil component is dissipated out of the capsule, so that the oil component dissolves in the lubricant and the desired properties as a solid lubricant cannot be maintained.

Furthermore, there is a description in which a paraffin coating layer is formed on the inner surface of a hollow container and grease having a high viscosity is sealed inside.
Japanese Utility Model Publication No. 58-22854

  Similar to the lubricant of Patent Document 5, it is difficult to fill the inner surface of each chamber of the container of Patent Document 7 with a paraffin wall, which results in a high cost.

Patent Document 8 includes a microcapsule powder and a wax raw material, the wall material of the microcapsule powder contains a solid lubricant such as molybdenum disulfide, and the microcapsule powder is a dispersion of the solid lubricant and oil or grease. It describes a wax that contains the body and in which the microcapsule powder is uniformly dispersed in the wax.
Japanese Patent Laid-Open No. 6-158071

  Similarly to Patent Document 6, this Patent Document 8 also mixes microcapsules in a pre-dissolved lubricant and uniformly disperses them because the capsule shell material is gelatinous or the like. The capsule is ruptured due to the melting temperature during stirring, and the oil contained therein dissolves in the lubricant, and only the material of the broken capsule film is stirred. It is difficult to produce a solid lubricant having a desired initial hardness because it is difficult to produce a solid lubricant in a uniformly dispersed state due to gathering inside and becoming a bun.

  The lubricants described in Patent Document 4 to Patent Document 8 are filled with grease in which solid lubricant is mixed with high-viscosity metal soap such as lubricating oil, mineral oil, and silicon oil, pentonite, and the like. At normal temperature, the lubricant does not bleed, but the lubricant oozes over time, and the lubricant adheres to the rail side of the traveling crane and the application surface of the wheel flange surface of the traveling body, and the surrounding dust is lubricated. It adheres to the periphery of the oil application surface, spreads to the periphery of the application surface, and the application surface is contaminated by getting wet or dirty. On the other hand, the contact resistance between the rail side and the sliding surface of the wheel flange surface of the traveling body is reduced. There is a problem that the size of the vehicle becomes large and the traveling body cannot smoothly run.

In view of the problems of the related art, the present invention is attached to a traveling body that travels on a rail such as a traveling crane and prevents wear of the side surface of the rail and the wheel flange surface of the traveling body together with traveling of the traveling body, Lubricant used in a traveling body for reducing the contact resistance of the sliding surface and causing the traveling body to travel smoothly, more specifically, a lubricant in which a solid lubricant container is filled with a paste-like lubricant Is intended to provide.

  The present invention has been made based on such a viewpoint, and has an extremely thin sealing agent at the insertion port of the container-like solid lubricant, and a sufficient oil content is contained in the solid lubricant. It is characterized by a lubricant filled with a pasty lubricant.

Solid lubricant is composed of a molybdenum disulfide or tungsten disulfide and graphite and synth tic wax or a thermoplastic synthetic resin, pasty lubricant, from those containing a base oil and thickener and molybdenum disulfide and graphite Thus, the contact area between the solid lubricant and the paste lubricant is approximately 5: 3.

  The lubricant of the present invention has a very thin sealing seal material at the container-shaped solid lubricant insertion port, and is filled with the paste-like lubricant in the solid lubricant. A dry, tough lubricant film is formed on the side of the rail of a traveling crane or the like and on the surface of the wheel flange of the traveling body where the lubricant is applied. do not do. Therefore, since the surrounding dust does not adhere to the lubricating oil application surface and the application surface does not get dirty, there is no diffusion of oil, etc., and there is no moisture resistance, rain resistance corrosion, etc. The contact resistance of the sliding surface of the wheel flange surface of the traveling body is reduced, and the traveling body can travel smoothly.

In the lubricant of the present invention, the contact area between the solid lubricant and the paste-like lubricant is approximately 5: 3, so that the semi-dried lubricant film runs on the side of the rail while the strength of the solid lubricant is sufficiently maintained. Since it is formed on the sliding surface of the wheel flange surface of the body, the contact resistance between the side surface of the rail and the sliding surface of the wheel flange surface of the traveling body is reduced, and the traveling body can run smoothly, The service life is extended.

Hereinafter, the configuration of the lubricant according to the present invention will be described with reference to the drawings. First, FIG. 1 is a perspective view showing a representative example of a curved lubricant according to the present invention, FIG. 2 is a perspective view of a rectangular lubricant, and FIG. 3 is a cross-sectional view taken along line AA of FIG.
In these drawings, the lubricant is composed of a solid lubricant 1 and a paste-like lubricant 2 made of a hollow solid container.

  The solid lubricant 1 is a lubricant in which molybdenum disulfide, tungsten disulfide, graphite or the like is mixed into a heated and liquefied synthetic wax, thermoplastic synthetic resin, etc., and stirred and homogenized. 1. Injected into a mold having a shape as shown in FIG. 2, cooled and solidified.

  On the other hand, in the built-in chamber 3 of the solid lubricant 1 composed of a hollow solid container, a commonly used lubrication such as mineral oil, ester-based synthetic oil, hydrocarbon-based synthetic oil or the like is performed by a paste filling machine from the insertion port 4. A pasty lubricant containing oil, thickening material, molybdenum disulfide or tungsten disulfide, graphite or the like is filled, and then sealed with a sealing material 5 for sealing.

  As the sealing material 5 for sealing, a solid lubricant melted using a hot gun is welded to the insertion port 4 and then cooled, and the pasty lubricant is completely sealed.

  As shown in FIGS. 1 and 2, an application wall 6 made of a solid lubricant 1 is formed on the side surface of a rail such as a traveling crane and the lubricant application surface of the wheel flange surface of the traveling body. The application wall 6 is formed to have a thickness of about 0.3 to 1.0 mm so that the solid lubricant 1 and the paste-like lubricant are immediately and uniformly applied to the lubricant application surface during use. .

  Examples of the base oil used in the present invention include commonly used lubricating oils such as mineral oils, ester-based synthetic oils, ether-based synthetic oils, hydrocarbon-based synthetic oils, and mixed oils thereof.

  Examples of the thickener used in the present invention include various metal soaps such as lithium soap and petroleum-based petroleum jelly. In addition, urea compounds obtained by reaction of aliphatic amines, alicyclic amines, aromatic amines and the like with various isocyanate compounds may be used. Examples of urea thickeners include aliphatic diurea compounds, aromatic diurea compounds, aliphatic polyurea compounds, and aromatic polyurea compounds.

  Molybdenum disulfide has a layered lattice structure as its lubrication mechanism and easily shears into a thin layer under a sliding motion to reduce friction. Note that tungsten disulfide may be used instead of molybdenum disulfide.

  Graphite (graphite) is one of the allotropes of carbon and exhibits wear prevention performance and seizure prevention performance, and forms a film on the sliding surface. An average particle size of 0.25 to 10 μm is suitable.

  In addition to the above components, the paste-like lubricant of the present invention may contain an antioxidant, a rust inhibitor, a corrosion inhibitor, a load-resistant additive, and the like.

The paste-like lubricant of the present invention is 65 to 75% by weight of base oil, 5 to 10% by weight of thickener, 10 to 20% by weight of molybdenum disulfide, graphite based on the total weight of the paste-like lubricant. 2 to 5% by weight, and other additives 1 to 5% by weight. Expected effects when the base oil content is less than 65% by weight, the thickener content is less than 5% by weight, the molybdenum disulfide content is less than 10% by weight, and the graphite content is less than 2% by weight. The base oil content is 75% by weight or more, the thickener content is 15% by weight or more, the molybdenum disulfide content is 25% by weight or more, and the graphite content is Even in the case of 10% by weight or more, lubrication has an adverse effect. When the dropping point is 200 ° C. or lower and the consistency (60 W / 25 ° C.) is 250 or higher, the lubricant flows out when the lubricant ambient temperature is 40 ° C. or higher.

For the area ratio when the solid lubricant and the paste lubricant are brought into contact with the application surface of the rail, wheel, etc., when the contact area of the solid lubricant is smaller than the contact area of the paste lubricant, The adhesion ratio of the lubricant to the application surface increases, and when the contact area of the solid lubricant is larger than the contact area of the paste lubricant, the adhesion ratio of the lubricant to the application surface decreases.
At this time, if the pasty lubricant is neither dry nor wet, but semi-dry, that is, if the dropping point is 200 ° C. to 250 ° C. and the consistency is 230 or less, a lubricating coating is formed. There is no phenomenon, and a stronger, semi-dry, tough lubricating coating with stronger adhesion is formed.

If this is shown by FIG. 3, the area C of the solid lubricant 1 is A × BD, and the area D of the paste lubricant 4 is a × b.
Therefore, when C ≦ D, the mechanical strength as a solid lubricant cannot be obtained, and cutting is likely to occur, so that it cannot be used as a lubricant.
Further, when C ≧ D and C is much larger than D, the mechanical strength as a solid lubricant is too high and does not easily wear out, and the adhesion of the paste-like lubricant to the application surface cannot be achieved. It has been found that a lubricating coating cannot be formed.

  Therefore, as a result of various experiments, when the ratio of the contact area of the solid lubricant and the contact area of the paste lubricant is 5: 3, the best semi-dry lubricant film can be formed. I was able to.

Hereinafter, the present invention will be described based on examples and comparative examples.
Examples 1-4, Comparative Examples 1-4
In Example 1, as a solid lubricant, 150 g of molybdenum disulfide and 50 g of graphite, 900 g of polyethylene wax (melting point: 105 ° C.) at 150 ° C. were kneaded and poured into a mold that was kept warm, and molded into a container-like fixed lubricant. Got.
Moreover, 700 g of mineral oil and 110 g of lithium soap were added and stirred as the base oil and heated to 70 to 100 ° C. Furthermore, 200 g of mineral oil was added, heated to 200 ° C., and then cooled to 100 ° C. or lower to obtain a base paste.
Next, molybdenum disulfide and graphite as shown in Tables 1 and 2 are added to the obtained base paste, and a drop point is adjusted to 200 ° C. by a roll mill while appropriately adding mineral oil to obtain a pasty lubricating oil. It was.
Also, paste-like lubricating oil is poured into a container-like solid lubricant and filled, and a solid lubricant similar to the solid lubricant is melted into a container-like solid lubricant insertion port using a hot gun. After the lubricant was welded to the insertion port 4, it was cooled and the pasty lubricant was completely sealed.
In Examples 2, 3, and 4, mineral oil, thickener, molybdenum disulfide, and graphite were mixed at a weight percent ratio shown in Table 1, respectively.
When the ratio of the contact area of the solid lubricant and the contact area of the paste lubricant was 5: 3, the optimum effect was achieved.
In Comparative Examples 1 to 4, commercially available Moly paste (500), Moly paste (300), Sumitec (403), and Maltemp (SRL) were used as trials.

  Here, the dropping point was according to JIS K 22208 8, and the consistency was according to JIS K 22207. Moreover, the test result showed the relative life ratio by setting Example 1 to 100.

From the above examples and comparative examples, the lubricant of the present invention has no oil diffusion or the like, and does not show corrosion due to moisture resistance or rain resistance. The contact resistance is reduced, and the traveling body can run smoothly.
Further, since the contact area between the solid lubricant and the paste lubricant is approximately 5: 3, the semi-dried lubricant film is formed on the side surfaces of the rail and the wheel flange surface of the traveling body while the solid lubricant is sufficiently maintained in strength. Therefore, the contact resistance between the rail side surface and the sliding surface of the wheel flange surface of the traveling body is reduced, the traveling body can run smoothly, and the life of the coating is extended. The

It is a perspective view which shows an example of the lubricant which concerns on this invention. It is a perspective view which shows the other example of the lubricant shown in FIG. It is AA sectional drawing of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Container-form solid lubricant 2 Paste-form lubricant 3 Built-in chamber 4 Insertion slot 5 Sealing agent 6 Sealing wall C Solid lubricant contact area D Paste-type lubricant contact area

Claims (3)

The container-shaped solid lubricant insertion port has a very thin sealing agent, and the solid lubricant is filled with a paste-like lubricant. The solid lubricant is molybdenum disulfide. Or, it consists of tungsten disulfide and graphite and synthetic wax or thermoplastic synthetic resin, and the paste-like lubricant consists of a base oil, a thickener, molybdenum disulfide and graphite , and a solid lubricant and paste-like lubricant. Lubricant characterized in that the contact area of the lubricant is approximately 5: 3 2. The lubricant according to claim 1, wherein the pasty lubricant has a dropping point of 200 ° C. or higher and a consistency of 230 or lower. The paste lubricant is 65 to 75% by weight of the base oil, 5 to 10% by weight of the thickener, 10 to 20% by weight of molybdenum disulfide, 2 to 2% of the graphite, based on the total weight of the paste lubricant. The lubricant according to claim 1 or 2, wherein 5 wt% and other additives contain 1 to 5 wt%.

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