JP2010107251A - Method and device for diagnosing foreign substance in lubricant - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a device of a diagnosing foreign substances in a lubricant for simply and rapidly diagnosing the foreign matter in the lubricant, and to provide a method of diagnosing the foreign substances in the lubricant. <P>SOLUTION: The device of diagnosing the foreign substance in the lubricant has an injection cylinder 15, constituted of an outer cylinder 13, filled with the lubricant 11 and having a warming part 12 for keeping the warmth of the inside of the outer cylinder or internally warming it, and an inner cylinder 14 for pressing the warmed lubricant 11 under a predetermined pressure; and a filter part 16 for keeping the leading end part of the injection cylinder 15 equipped with a filter 16a, and is constituted so that the inner cylinder 14 is pressed under a predetermined pressure to collect the foreign matter 17 in the lubricant 11 by the filter part 16. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a foreign matter diagnostic device and method in lubricating oil that can quickly measure foreign matter of lubricating oil as a lubricant used in devices such as hydraulic control devices, pumps, engines, pistons, bearings, and valves.

Equipment that uses lubricating oil includes hydraulic control devices, pumps, engines, pistons, bearings, valves, and so on. Maintaining the quality and purity of the lubricating oil contained in these products is important to maintain equipment durability.
At that time, if the lubricating oil contains foreign components such as impurities, the possibility of equipment damage increases. Further, when the wear of the device sliding portion occurs, the wear powder becomes a contaminant and exists in the lubricating oil. Therefore, the amount of foreign matter in the lubricating oil and the analysis of the components should be analyzed quickly in order to estimate the risk of equipment wear, the degree of wear when wear occurs, and the wear location. is there.

  Conventionally, the measurement of foreign matters in lubricating oil includes ferrography, fine particle measurement method (NAS grade) (JIS 9934), fine particle measurement method using an optical microscope (JIS B 9930), and contamination measurement method by mass method (JIS B 9931). Etc. exist.

Further, a filterability test method as shown in FIG. 3 has been proposed.
As shown in FIG. 3, in the filtration device 100, a filter paper 103 is installed in a filter 102 installed in a flask 101, a predetermined amount of lubricating oil (diluted with an organic solvent) 104 is supplied, and a vacuum pump 105 is used to draw it. As a result, the foreign matter 106 is collected on the filter paper 103. In the figure, reference numeral 107 denotes a filtrate.
Note that when the lubricating oil 104 is filtered, it is diluted with an organic solvent (for example, hexane or the like), and ventilation means is essential.

JISB9934 JISB9930 JISB9931

  In the analysis technique of the JIS method, each device, instrument, and organic solvent are required, and operation in a local exhaust facility is required. Therefore, the lubricant sampled on site must be taken home and analyzed. For this reason, it takes about one week until the result is obtained, and there is a problem that it is not possible to quickly respond to troubles such as hydraulic equipment.

  In particular, troubles such as hydraulic oil for marine hydraulic equipment during navigation require a long period of time until results are obtained, and the current situation is that many losses are incurred until the countermeasures are implemented. The emergence of rapid measuring devices is required.

  In view of the above problems, an object of the present invention is to provide an apparatus and a method for diagnosing foreign matter in lubricating oil in a simple and quick lubricating oil.

  A first invention of the present invention for solving the above-described problem is that an outer cylinder having a heat retaining portion that is filled with a predetermined amount of lubricating oil and that retains or warms the inside, and the retained or warmed lubricating oil. A syringe barrel comprising an inner cylinder that is pressed at a predetermined pressure, and a filtration part having a filter at the tip of the syringe cylinder. The foreign substance in the lubricating oil at the filtration part by pressing the inner cylinder at a predetermined pressure In a foreign matter diagnostic apparatus in lubricating oil.

  According to a second aspect of the present invention, in the first aspect of the present invention, there is provided a foreign matter diagnostic apparatus in lubricating oil characterized in that the temperature for keeping or warming is 60 to 80 ° C.

  According to a third aspect of the present invention, in the first or second aspect of the invention, there is provided a foreign matter diagnostic apparatus in a lubricating oil, wherein the viscosity of the lubricating oil that has been kept warmed or heated is 30 cst or less.

  4th invention uses the foreign material diagnostic apparatus which comprises the filtration part which filters the predetermined amount of lubricating oil with a filter, and the heat retention part which heat-retains or heats the lubricating oil to filter, and makes lubricating oil predetermined pressure In the method for diagnosing foreign matter in the lubricating oil, the foreign matter in the lubricating oil on the filter surface is collected by passing through the filtration part, and then the amount of the foreign matter is measured.

  5th invention uses the foreign material diagnostic apparatus which comprises the filtration part which filters the predetermined amount of lubricating oil with a filter, and the heat retention part which heat-retains or heats the lubricating oil to filter, and uses a predetermined pressure for lubricating oil In the method for diagnosing foreign matter in lubricating oil, the foreign matter in the lubricating oil on the surface of the filter is collected by passing through the filtration part, and then the form (for example, color tone) of the foreign matter is compared with a standard sample.

  6th invention uses the foreign material diagnostic apparatus which comprises the filtration part which filters the predetermined amount of lubricating oil with a filter, and the heat retention part which heat-retains or heats the lubricating oil to filter, and makes lubricating oil predetermined pressure In the method for diagnosing a foreign matter in the lubricating oil, the foreign matter in the lubricating oil on the filter surface is collected by passing through the filtration part, and then the foreign matter is analyzed by a fluorescent X-ray analyzer.

  A seventh invention is the foreign matter diagnosis method in lubricating oil according to any one of the fourth to sixth inventions, wherein the temperature to keep or warm is 60 to 80 ° C.

  A seventh invention is the foreign matter diagnostic method in the lubricating oil according to any one of the fourth to seventh inventions, wherein the viscosity of the heat-retained or warmed lubricating oil is 30 cst or less.

  According to the present invention, it is possible to inspect the lubricating oil periodically at the elapse of a predetermined period on site, and the conventional lubricating oil is not moved to a place where analysis equipment is prepared. As a result, simple and quick diagnosis of the lubricating oil is possible, and it is possible to set a guideline for replacing the lubricating oil at an appropriate time.

  Hereinafter, the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited to the embodiments. In addition, constituent elements in the following embodiments include those that can be easily assumed by those skilled in the art or those that are substantially the same.

An apparatus for diagnosing foreign matter in lubricating oil according to an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic diagram of a foreign matter diagnostic apparatus in lubricating oil according to a first embodiment. As shown in FIG. 1, the foreign matter diagnostic apparatus 10 in lubricating oil according to the present embodiment is filled with a predetermined amount of lubricating oil 11, and has an outer cylinder 13 having a heating unit 12 that keeps or warms the inside. It has an injection cylinder 15 comprising an inner cylinder 14 that presses the warmed or heated lubricating oil 11 with a predetermined pressure, and a filtration part 16 provided with a filter 16a at the distal end of the injection cylinder 15, the inner cylinder 14 is pressed at a predetermined pressure, and the foreign matter 17 in the lubricating oil 11 is collected by the filtration unit 16.
Here, the filter 16 a of the filtration unit 16 is held together with the metal mesh 18 by the collection units 13 a and 13 b on the distal end side of the outer cylinder 13. For the filter 16a, for example, polytetrafluoroethylene ("Teflon (registered trademark)"), cellulose, fluorine resin, or the like can be used.

In order to make a diagnosis of lubricating oil using the foreign substance diagnostic apparatus 10, in order to improve the fluidity of the lubricating oil, the temperature is kept as it is when heated to 60 ° C. or higher. .
In the case of 60 ° C. or lower, the fluidity is improved by heating by the heating unit 12.

  Further, the viscosity of the lubricating oil that has been kept warm or heated is, for example, 30 cst or less, preferably 20 cst or less. This is because if it exceeds 30 cst, filtration time is required, and workability on site is reduced.

  In order to diagnose foreign matter using the foreign matter diagnostic device 10 in the lubricating oil of the present embodiment, a predetermined amount (for example, 100 cc) of lubricating oil 11 is introduced into the outer cylinder 13, and then the inner cylinder 14 is mounted. Then, the warming unit 12 heats the predetermined temperature. Thereafter, the filter 16a of the filtration unit 16 is passed at a predetermined pressure (for example, about 2 atmospheres or more), and foreign matter in the lubricating oil 11 is collected on the surface of the filter 16a.

After the collection, the amount of the foreign matter 17 collected by the filter 16a is measured with a weigh scale.
Furthermore, the size and type of the foreign matter are estimated with a microscope.
Alternatively, the color tone of the surface of the filter 16a is compared with a standard sample.

  Furthermore, fluorescent X-rays may be irradiated by a portable fluorescent X-ray irradiation device, and components (for example, Fe, Cu, Cr, Ni, Si, Mg, Ca, etc.) may be analyzed. Thereby, the kind of foreign material in lubricating oil can be specified.

According to the present invention, it is possible to inspect the lubricating oil periodically at the elapse of a predetermined period on site, and the conventional lubricating oil is not moved to a place where analysis equipment is prepared. As a result, simple and quick diagnosis of the lubricating oil is possible, and it is possible to set a guideline for replacing the lubricating oil at an appropriate time.
Moreover, the diagnostic accuracy can be improved by increasing the number of examinations depending on the degree of diagnosis.

  As described above, according to the present invention, it is possible to quickly diagnose the lubricating oil at the site, and it does not take a long time until the conventional result is obtained, and the period until the countermeasure is implemented is eliminated. Large losses can be avoided.

An apparatus for diagnosing foreign matter in lubricating oil according to an embodiment of the present invention will be described with reference to the drawings.
FIG. 2 is a schematic diagram of a foreign matter diagnostic apparatus in lubricating oil according to the second embodiment. As shown in FIG. 2, the foreign matter diagnostic device in lubricating oil according to the present embodiment is provided with a filtering unit 24 in a sampling line 22 branched from a main line 20 through which the lubricating oil 21 flows, and branched lubricating. By allowing the oil 21a to pass through the filtering unit 24, foreign matters in the lubricating oil 21a are collected by a filter (not shown) in the filtering unit 24.
Reference numeral 12 denotes a heating unit that heats the sampling line 22. Reference numeral 23 denotes a valve provided in the sampling line 22. By opening the valve 23, foreign matter in the lubricating oil can be arbitrarily measured.

  In the foreign matter diagnostic apparatus, the lubricating oil 21b from which foreign matter has been removed from the filtering unit 24 is separately returned to the return tank. Further, a drawing pump may be provided and sent to the main line 20.

In order to perform the measurement, a filter is installed in the filtration unit 24, the heating unit 12 is heated, and the valve 23 is opened in a state of being kept warm (60 to 80 ° C.) to filter the lubricating oil 21a.
Thereafter, the valve 23 is closed, the filter is taken out, and diagnosis is performed as in the first embodiment.

  According to the present embodiment, it is possible to sample on-site, diagnose the lubricating oil when necessary, and prevent troubles such as hydraulic equipment.

  As a result, for example, troubles such as hydraulic oil for marine hydraulic equipment during navigation such as a ship can be prevented.

  As described above, the foreign matter diagnostic apparatus in the lubricating oil according to the present invention can periodically inspect the lubricating oil every predetermined period, and can replace the lubricating oil at an appropriate time. Suitable for simple judgment of lubricating oil.

It is the schematic of the foreign material diagnostic apparatus in the lubricating oil which concerns on Example 1. FIG. It is the schematic of the foreign material diagnostic apparatus in the lubricating oil which concerns on Example 2. FIG. It is the schematic of the foreign material diagnostic apparatus in the conventional lubricating oil.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Foreign substance diagnostic apparatus 11 Lubricating oil 12 Heating part 13 Outer cylinder 14 Inner cylinder 15 Injection cylinder 16 Filtration part 16a Filter 17 Foreign substance

Claims (8)

An outer cylinder filled with a predetermined amount of lubricating oil and having a heat retaining portion for retaining or warming the interior;
A syringe barrel composed of an inner cylinder that presses the heated or warmed lubricating oil at a predetermined pressure;
It has a filtration part with a filter at the tip of the syringe barrel,
An apparatus for diagnosing a foreign matter in lubricating oil, wherein the inner cylinder is pressed at a predetermined pressure and foreign matter in the lubricating oil is collected by a filtration unit. In claim 1,
An apparatus for diagnosing a foreign matter in lubricating oil, wherein the temperature for keeping or warming is 60 to 80 ° C. In claim 1 or 2,
An apparatus for diagnosing a foreign matter in lubricating oil, wherein the viscosity of the lubricating oil heated or warmed is 30 cst or less. A filtration unit for filtering a predetermined amount of lubricating oil through a filter;
Using a foreign substance diagnostic device comprising a heat retaining section for retaining or warming the lubricating oil to be filtered,
A method for diagnosing foreign matter in lubricating oil, wherein the lubricating oil is allowed to pass through a filtration unit at a predetermined pressure to collect foreign matter in the lubricating oil on the filter surface, and then the amount of foreign matter is measured. A filtration unit for filtering a predetermined amount of lubricating oil through a filter;
Using a foreign substance diagnostic device comprising a heat retaining section for retaining or warming the lubricating oil to be filtered,
A method for diagnosing a foreign matter in lubricating oil, wherein the foreign matter in the lubricating oil on the filter surface is collected by allowing the lubricating oil to pass through the filter at a predetermined pressure, and then the form of the foreign matter is compared with a standard sample. A filtration unit for filtering a predetermined amount of lubricating oil through a filter;
Using a foreign substance diagnostic device comprising a heat retaining section for retaining or warming the lubricating oil to be filtered,
A method for diagnosing a foreign matter in the lubricating oil, in which the lubricating oil is passed through the filtration section at a predetermined pressure to collect foreign matter in the lubricating oil on the filter surface, and then analyzed by a fluorescent X-ray analyzer. In any one of Claims 4 thru | or 6,
A method for diagnosing a foreign matter in lubricating oil, wherein the temperature for keeping or warming is 60 to 80 ° C. In any one of Claims 4 thru | or 7,
A method for diagnosing a foreign matter in a lubricating oil, wherein the viscosity of the heated or warmed lubricating oil is 30 cst or less.

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