JPS5846293A - Method of supplying lubricating oil - Google Patents

Abstract

PURPOSE:To enable to feed lubricating oil in a stable manner irrespective of piping arrangement and to feed the lubricating oil to a high place, by dripping oil into a compressed air passage without forming oil into mist, and feeding oil while extending oil along the inner surface of an air supply pipe in the form of oil film. CONSTITUTION:Compressed air is supplied from a pump unit 11 to a distributor 16 via a main air pipe 14 while oil is supplied from a main oil pipe 15 in the same way. In the distributor 16, air is passed from a mixing section 23 to a branch pipe 18 at a flow rate determined by an air control valve 22 while oil is dripped into the mixing section 23 continuously or intermittently at a rate deter- mined by an oil distributor valve 24. Resultantly, oil is carried into the branch pipe 18 by the high-speed flow of air ejected from the mixing section 23 to the branch pipe 18 while forming oil film 25 along the inner surface of the branch pipe 18, and ejected as oil drips 26 from the open end of the branch pipe 18.

Description

[Detailed description of the invention] This invention relates to a lubricating oil supply method.

Conventionally, a centralized lubrication method for continuously supplying a relatively small amount of lubricating oil to oil supply parts such as bearings and other bearing parts or other sliding parts uses compressed air as a conveying medium and a mist of oil as a mixed air. A method is known in which oil is supplied as relatively large oil particles or oil droplets in a feeding and oil supply section.

In this method, for example, as shown in Fig. 1, oil is stored inside a tank and heated from the bottom with a heater 2, and an air introduction pipe 3 and an air supply main pipe 4 are connected in an open manner to the top of the tank. Air introduction 1i1 is installed in the upper space of tank 1.
3 and the main air supply pipe 4 by a shielding plate 9, leaving the lower part open, and in front of the opening of the air introduction pipe 3 is a dripping nozzle 5 for dripping the oil in the tank l from above. There is a method in which a mist of oil is produced using an oil mist unit provided with an oil mist unit, and a branch t7 is branched from the main air supply pipe 4 to an oil supply section 6 such as a bearing to supply the mist of oil together with air. In this case, a nozzle 8 is provided in front of the oil supply section 6 to supply mist-like oil once condensed into oil droplets.

Although the above method has excellent characteristics as a method for continuously supplying a small amount of oil to the oil supply section, it has some limitations and problems as follows, since the oil is mixed with air and conveyed as a mist of several micrograms. There is.

First of all, high viscosity oil cannot be used because it is difficult to form into a mist, and it is also impossible to use oil mixed with a solid lubricant that has a different specific gravity and distribution characteristics from oil.

Next, while circulating with air, mist tends to turn into oil droplets due to collisions with each other, collisions with unevenness or bends in the pipe, contact resistance with the inner circumferential surface of the pipe, etc. The density of the mist amount changes depending on the size of the diameter, the length of the pipe, the height of the oil supply part, etc.), and the amount of oil supply changes. This is almost impossible.Thirdly, there is still a large amount of mist that does not form into oil droplets or macroscopic shapes in the oil supply section.
(estimated to be around 80%), in addition to wasting too much oil, a large amount of oil mist is included in the exhaust air that passes through the oil supply section, causing environmental pollution.
Or there are drawbacks that pose a fire hazard.

This invention aims to provide a method for supplying lubricating oil using an air conveyance method that solves the above-mentioned problems.In this invention, the oil is dripped into the compressed air flow path without turning into a mist, and the oil is dripped onto the inner circumferential surface of the air flow pipe. It is characterized in that it is supplied while being stretched as an oil film.

FIG. 1 is an explanatory diagram showing an example of the piping of the apparatus used in the method of the present invention.The bomb unit (11) includes a pump for pressure-feeding air and oil, and an air suction pipe 13 equipped with a filter 12, and an air suction pipe 13 for supplying compressed air and oil. An air main pipe 14 and an oil main pipe 15 that are supplied separately are connected. The main air pipe 14 and the main oil pipe 5 are connected to one or more distributors 16, and a branch pipe 18 is provided for supplying oil and air from the distributor 16 to each oil supply section 17 such as a bearing. Branch pipe 18
A nozzle 19 is attached in front of the oil supply part, and a branch pipe 18
More refueling part 1? The mechanism is designed to make the oil released into a droplet shape that matches the purpose of binding and sliding as much as possible.

FIG. 3 is an enlarged sectional view showing an example of the structure of the distributor 16.
Inside the distributor 16 are an air port 20 and an oil port 21 connected to the main air pipe 14 and the main oil pipe 15, respectively.
is formed, the air port 20 communicates with the mixing part 23 via the air regulating valve 22 in the distributor 16, and the oil port 21
is in communication with the mixing section 23 via an oil distribution valve 24 that is integrally assembled at the top of the distributor 16. The mixing section 23 is connected to the end of the branch pipe 18 .

To explain the operation when lubricating the oil supply unit 17 using the above-mentioned device, compressed air is supplied from the pump unit 11 through the air main pipe 14 (Note: The supply pressure of this compressed air is the same as that of conventional oil mist conveying air. The oil is distributed and sent to the vessel 16 (the flow velocity inside the pipe is also high), and oil is similarly supplied from the oil main pipe 15. In this method, the air pressure inside the pipe is 2 to 4 kg.
/cd, 0, 5 to 2 in the conventional oil mist method
kl[, the pressure is high compared to IK.

In the distributor 16, air is supplied from the mixing section 23 to the branch pipe 1B at a flow rate set by the air regulating valve 22, and oil is continuously supplied from the lid at a flow rate set by the oil distribution valve 24. is supplied dropwise into the mixing section 23 intermittently. As a result, the oil is carried to the branch pipe 18 by the high-speed air flowing out from the mixing section 23 into the branch t18. The oil dropped at this time has a temperature of about πσee or more even in the minimum case, so even if it is in the air flowing at high speed, it does not become a mist and adheres to the surface of the pipe due to the reaction of the air flow.
The oil is flowed in the direction of air flow while being stretched to form a thin oil film on the inner wall of the pipe.

FIG. 4 is a side and front cross-sectional view of the branch pipe 18 showing the state of the oil being sent by the oil adhering to the inner wall of the pipe, and the oil film 25 that is formed while being swept away on the inner periphery of the branch t18. At the opening of the branch pipe 18, oil droplets 26 or macro mist (oil droplets with a diameter of several tens of microns) are ejected from the inner peripheral end as shown in the figure.

That is, when oil is dropped into a small-diameter pipe through which air is flowing at high speed, the oil is stretched along the inner wall of the pipe in the direction of the air flow, and is continuously discharged from the end of the vibrator. This released oil is not in a micro mist state,
These are macroscopic oil droplets, and although they are carried by the air, the oil is not floating in the air; one part adheres to the peripheral wall of the pipe as an oil film, and the other part is completely separated from the internal space. It moves as a gas and is separated when released.

Approximately 40 steps from the supply point, the oil completely separates from the air and the oil film that forms there is uniform.This condition is the same even if the pipe is long, but an oil film is not formed in a long pipe. Since a corresponding amount of oil is required for this formation, oil droplets may be supplied continuously or intermittently.

As mentioned above, when the oil droplets released from the end of the pipe are supplied to the oil supply parts such as bearings, the oil droplets are already in a state where they can fully function as a lubricant and provide lubrication at the necessary locations. On the other hand, the air, which has been almost completely separated from the oil, functions as an oil supply section, that is, a cooling side for various operating sections, and is then discharged to the outside in a harmless state. This is already mentioned in the 19th edition of Petanokurupuru.

Incidentally, the time during which -drops (-Lcc or more) of oil can be continuously supplied to form an oil film of 00 varies depending on the part frame, but is approximately 5 to 20 minutes. Therefore, when lubricating a bearing, for example, the purpose of lubrication can be sufficiently achieved by periodically supplying stationary oil to the branch t18 using a distributor 16 as shown.

As a result of the above configuration, the present invention has the following specific effects.

1) Place a small amount of oil (for example, place 0.lcc of oil at 1
(over time) accurate and continuous refueling is possible.

2) In the conventional oil mist system, a certain amount of oil corresponded to a certain amount of air, so it was difficult to supply oil to each oil supply part with different spears in one unit. However, according to the present invention, since there is no such correlation, the amount of oil supply and the amount of air can be set individually.

3) Since the air supply pressure is increased, impurities and obstructions can be prevented from entering the bearings, etc.

4) The amount of oil supplied can be adjusted freely by adjusting the air and oil, and there is no need to make it into a mist, so there is a wide range of oil types and viscosity to choose from, and no preheating is required. In the conventional oil mist method, the viscosity was limited to 500 c8t (centistokes), but in the present invention, it is possible to use up to a viscosity of about 3000 cst, and a soft grease can be used satisfactorily.

5) Since the air supply is large, the cooling effect is large, and since the gas and liquid are separated, there is no risk of environmental pollution or fire outbreak.

6) Since oil is not discharged together with air in the form of oil mist, oil supply efficiency is high and there is almost no wastage of oil.

7) In the conventional oil mist system, the pump unit always needs to be installed at a lower position than the main distribution, and the height of the piping also poses a problem, but in the present invention, such restrictions do not exist at all.

[Brief explanation of drawings]

Figure '1 is used for the conventional lubricating oil supply method. Figure 2 is an explanatory piping diagram showing the equipment used in the method of the present invention.
FIG. 3 is an explanatory piping diagram showing an example; FIG. 3 is a partial enlarged cross-sectional view showing the main parts; FIGS. 4 (A) and (B) are enlarged cross-sectional views of a pipe showing the oil conveyance state in the method of the present invention . 11: Pump unit 12: Filter 13: Suction pipe 14: Main air pipe 15 Main oil pipe 1
6: Distributor 17: Oil supply section 18: Branch pipe 19: Nozzle 20: Air port 21 oil boat 22: Air adjustment valve 23: Mixing section 2
4 Oil distributing valve 25: Oil film 26: Oil droplet Patent applicant Atoko Co., Ltd. Figure 1 Figure 2 Figure 3 Figure b Figure 4 Procedural amendment October 22, 1980 Patent Office Junon MI Appearance - Tono 1 , Indication of the case 1981, 脣 此 1 No. 145034 2. Title of the invention Jll lubricating oil supply method ・3. Person making the amendment Relationship with the case Patent originator 4. Agent (翢340) Amendment book - Specification Correct the point of fire in the book. true,! JI page 4, line 6, figure 141 of rjl" is replaced with "
Correct one character as “Fig.-2”. 2.44gt In the 7th line, delete 2 characters and add 1 character, ``oil drop-like''. 3. Eighth, delete the first line and add 22 characters in its place: ``Individually subside the LIjI contamination of oil in each refueling group''. 4. Delete lines 17 to 8 on page 9 of ls, and add the three characters ``desu.'' in their place. 5. On page 9, in line 17, correct 1 character from "鵠LOW视" to "simplified low difference" 0

Claims (1)

[Claims] 1) In a method of supplying oil from a pump to an oil supply section using compressed air, oil is constantly dripped into the compressed air supply pipe, and the dripped oil is then applied to the inner wall surface of the supply pipe. A lubricating oil supply method characterized in that the oil is not stretched into a thin film to be deposited on the oil, but is supplied in the form of oil droplets to an oil supply section along the flow of air.