JP4447201B2 - Oil mist lubrication unit - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an improvement in a spray lubrication device that atomizes and supplies lubricating oil to sliding parts of various bearings, gears, and the like, and to a rolling part, and more particularly, raw oil that causes variation in oil amount By collecting and re-spraying, it is possible to supply an accurate amount of oil calculated according to the purpose of lubrication. The oil mist lubrication unit can continue to supply.
[0002]
[Prior art]
Conventionally, such an oil mist lubrication unit can be cited as one of the features that piping is simple and oil can be evenly distributed to each part. However, not only oil mist is discharged from the oil mist lubrication unit, but also oil that is not oil mist (hereinafter simply referred to as “raw oil”) is discharged at the same time via the oil mist conveying line. Supplied for lubrication purposes (oiling point).
[0003]
Also, the oil mist conveyance line from the lubrication unit to the lubrication purpose should be thickened to prevent the oil mist from becoming raw oil, in other words, to slow down the flow rate of compressed air. Or less bending of the same pipe, and the bending is performed with a large R as much as possible.
[0004]
In addition, when taking out from the main pipe to the branch pipe, consideration is given to taking it out from the top, but once the oil mist becomes raw oil or the raw oil discharged from the lubrication unit is attached with a drain trap or orifice. To the outside.
[0005]
[Problems to be solved by the invention]
However, in a conventional lubrication unit, oil mist-like oil rides on the flow of compressed air and is supplied to each part in proportion to the flow rate of compressed air. However, raw oil depends on the state of the piping. This is a cause of variation in the amount of oil supplied to achieve the purpose of lubrication, and the current situation is that the amount of oil is increased in anticipation of such variation in the amount of oil.
[0006]
In addition, since oil mist lubrication is used for high-speed rotation bearings, etc., there is a problem that variation in oil amount or intermittent supply of oil amount leads to temperature rise of the bearing, There is a concern that if the oil amount increases momentarily while the oil amount is intermittently supplied, the bearing will generate heat due to an increase in the heat of stirring.
[0007]
Furthermore, in the case of the current lubrication unit, piping from the OUT of the lubrication unit to the lubrication purpose is carried out by a conveyance line such as tube piping, but the raw oil adhering to this piping is stopped by the machine (compressed supply of compressed air) ) Later, there is a problem of returning to the unit side due to gravity.
[0008]
Moreover, this oil returns to the lubrication unit and is re-sprayed. However, when the amount of returned oil is large, there is a concern that the amount of fog will increase at the start of operation.
[0009]
The present invention has been made in view of such conventional problems, and by collecting and re-spraying raw oil that causes variations in the oil amount, an accurate oil calculated according to the purpose of lubrication is obtained. The object is to provide a useful oil mist lubrication unit capable of supplying a quantity.
[0010]
[Means for Solving the Problems]
In order to solve the conventional problems as described above and achieve the intended purpose, the gist of the present invention is that an oil storage tank that stores lubricating oil and a tributary of an air switching valve are fixed from the oil storage tank. A fixed quantity oil supply pump that sucks up the oil and supplies the oil to the oil mist generator, an oil mist generator that atomizes the oil supplied from the quantitative oil supply pump, the oil mist generator, and an object to be lubricated The oil mist conveyance line disposed between the oil spray chamber and the raw oil collected in the oil mist conveyance line and returned to the oil storage tank or the pressurized oil tank An oil mist lubrication unit comprising a recovery mechanism , wherein the raw oil recovery mechanism recovers an oil reservoir formed on a base side of the oil mist conveyance line or a raw oil recovery formed in the chamber The raw oil collected in one of the Through so resides in the oil mist lubrication unit is intended to recover the re-spray pump.
[0011]
Moreover, in the said crude oil collection | recovery mechanism, when collect | recovering the crude oil collected in the crude oil collection part formed in the chamber to the pump for respraying, from the oil reservoir part formed in the base side of the oil mist conveyance line A crude oil push-up air line is provided for forcibly supplying air toward the oil mist conveyance line and blowing up the raw oil adhering to the oil mist conveyance line.
[0013]
The oil mist lubrication unit of the present invention configured as described above is arranged in an oil storage tank for storing lubricating oil and a tributary of an air switching valve and sucks a fixed amount of oil from the oil storage tank to the oil fog generator. Between a metered oil supply pump for supplying the oil, an oil mist generating device for atomizing the oil supplied from the metered oil supply pump, and a chamber for spraying oil onto the oil mist generating device and a lubrication target An oil mist comprising: an oil mist conveying line disposed; and a raw oil collecting mechanism that collects the raw oil generated in the oil mist conveying line and returns it to the oil storage tank or the pressurized oil tank. In the lubrication unit , the raw oil recovery mechanism recovers the raw oil collected in either the oil reservoir formed on the base side of the oil mist transport line or the raw oil recovery unit formed in the chamber. , Re-spray by connecting the raw oil return pipe Is intended to recover the pump, further, in the raw oil collection mechanism, when recovered again spray pump raw oil accumulated in the raw oil collecting portion formed in the chamber, the base side of the oil fog conveying line By providing a crude oil push-up air line that forcibly feeds air from the oil reservoir formed in the oil mist toward the oil mist conveyance line and blows the raw oil adhering to the oil mist conveyance line. Not only can oil be efficiently recirculated into the oil mist generator, but also raw oil can be efficiently recirculated into the oil mist generator so as to minimize the influence of the raw oil that causes variations in the oil amount. Therefore, the oil amount calculated according to the lubrication purpose can be accurately supplied in the form of oil mist, and the raw oil adhering to the oil mist conveyance line is returned to the unit side by gravity by the raw oil push-up air line. That can be prevented That.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Next, a first embodiment of an oil mist lubrication unit according to the present invention will be described with reference to FIG. In the drawing, A is an oil mist lubrication unit according to the present invention, and this oil mist lubrication unit A communicates with an oil storage tank 1 for storing lubricating oil and the oil storage tank 1 as shown in FIG. The oil mist generating device 2 to be piped as needed, the metering oil supply pump 3 disposed in a branch flow of an air switching valve (not shown), and the raw oil generated in the oil mist conveying line to be described later A crude oil recovery mechanism 4 forcibly returning the oil into the oil storage tank 1 is provided.
[0017]
The oil mist generator 2 includes an oil dripping monitoring site dome 6 attached to the upper part of the pressurized oil tank 5, a venturi mechanism 7 attached to the lower part of the site dome 6, and a bottom part in the pressurized oil tank 5. And an oil return line 9 for returning the oil accumulated at the bottom of the pressurized oil tank 5 to the venturi mechanism 7 again.
[0018]
The metering oil supply pump 3 includes a plunger pump 3a communicated with the oil tank 1, and a three-port solenoid valve 3b communicated with an air switching valve (not shown). The plunger pump 3a is actuated by the compressed air by the off operation, and a fixed amount of oil 10 that has been cleaned is sucked from the oil tank 1 through an oil filter (not shown). The oil is supplied.
[0019]
On the other hand, the raw oil recovery mechanism 4 includes an oil reservoir 4a formed on the base side of the oil mist conveyance line 13, and a respraying pump 4c communicated with the oil reservoir 4a via a raw oil return pipe 4b. The respraying pump 4c and the oil mist generating device 2 are provided with a second raw oil reflux line 4d.
[0020]
Accordingly, the raw oil remaining in the oil reservoir 4a is forced to return to the oil storage tank 1 through the raw oil return pipe 4b and the second raw oil return line 4d by driving the respraying pump 4c. However, most of the raw oil is again subjected to atomization.
[0021]
Further, the pressurized oil tank 5 is provided with a level switch 8 and an oil discharge valve mechanism (not shown), so that it is possible to easily detect the state of accumulation of lubricating oil, and to detect a decrease in the capacity of the venturi mechanism 7. can do.
[0022]
Such venturi mechanism 7, site dome chamber and venturi holder 7a having at least one or more of the oil passages 7a ₁ which communicates with the inside 6a, the oil passage 7a ₁ duplicate reflux oil formed in the venturi holder 6a to pass An inflow chamber 7b, a venturi main body 7c assembled below the reflux oil inflow chamber 7b, and a venturi upper passage 7d for allowing the reflux oil inflow chamber 7b and the oil return line 9 to communicate with each other are provided.
[0023]
In addition, when a part of the compressed air supplied to the venturi mechanism 7 is branched and guided to the air bypass adjusting needle 12 and the object to be lubricated is cooled and the object to be lubricated is accommodated in the housing, the The compressed air flow rate is adjusted for the purpose of preventing intrusion of cutting fluid, cooling water, etc., and then mixed into the oil mist conveyance line 13. In the figure, reference numeral 14 denotes a fog distributor chamber, and output ports 14a, 14a,.
[0024]
The oil mist lubrication unit of the present embodiment configured as described above is re-communicated through the raw oil return pipe 4b even if the raw oil generated in the oil mist conveyance line 13 stays in the oil reservoir 4a. The raw oil can be dropped into the oil storage tank 1 in order to efficiently recover the raw oil while being returned to the oil storage tank 1 by driving the spray pump 4c. Adverse effects (increased fog) can be prevented.
[0025]
In particular, since most of the raw oil is recovered and re-sprayed by the above-described raw oil recovery mechanism 4, it is possible to eliminate the waste of increasing the oil amount in anticipation of the oil amount variation up to now, and for lubrication purposes. The amount of oil calculated according to can be accurately supplied (even in a small amount).
[0026]
Next, a second embodiment of the oil mist lubrication unit according to the present invention will be described with reference to FIG. In order to facilitate understanding, the same parts as those in the first embodiment described above are denoted by the same reference numerals, and only parts having different configurations will be described with new numbers.
[0027]
In the figure, reference numeral 15 denotes a raw oil recovery mechanism (second embodiment) according to the present invention, and an oil reservoir 15a formed on the base side of the oil mist conveying line 13 and oil from the oil reservoir 15a. A crude oil push-up air line 15b that forcibly feeds air toward the mist transport line 13, a raw oil recovery part 15c formed in the chamber 14 of the oil mist transport line 13, and a raw oil recovery part 15c A respraying pump 15e communicated via the raw oil return pipe 15d, and a second raw oil recirculation line 15f communicating the respraying pump 15e and the oil mist generator 2 are provided.
[0028]
The oil mist lubrication unit of the present embodiment configured as described above prevents the raw oil adhering to the oil mist conveyance line 13 from being returned to the unit side by gravity as a result of being blown up by the raw oil boosting air line 15. In addition, the raw oil retained in the raw oil recovery section 15c is passed through the raw oil return pipe 15d, the re-spraying pump 15e, and the second raw oil recirculation line 15f in the pressurized oil tank 5 as in the first embodiment. Can be forcibly returned.
[0029]
Moreover, since the raw oil that causes the variation in the oil amount is fed into the pressurized oil tank 5 so as to be gradually re-sprayed by the re-spray pump 15e, the piping is provided at the initial stage of operation of the conventional oil mist lubrication unit. The phenomenon that the amount of fog increases due to the raw oil returning from can be prevented.
[0030]
The circulating oil mist lubrication unit A of the present invention is not limited to this embodiment, and can be freely modified within the scope of the object of the present invention, and the present invention includes all of them. To do.
[0031]
For example, the oil stored in the bottom of the pressurized oil tank 5 is forcibly sucked up by the oil recirculation line 9 using the differential pressure generated by the compressed air flowing through the venturi mechanism 7, and the recirculation oil inflow chamber 7b. Since the atomization is continuously performed in a reflux system that passes through the center of the venturi body 7c again, as long as there is stored oil in the pressurized oil tank 5 , the oil mist can be continuously supplied. When the amount of oil supplied by the oil supply pump 3 is large, in other words, when it is desired to further reduce the amount of oil for the purpose of lubrication depending on the processing conditions, the oil stored in the pressurized oil tank 5 is increased by driving the oil return pump. By returning to the oil storage tank 1 at atmospheric pressure and introducing the supply pressure into the site dome chamber 6a, the differential pressure of the oil suction in the venturi mechanism 7 can be eliminated, and the atomization can be stopped.
[0032]
Further, the oil that has been in the pressurized oil tank 5 and has not become a fine oil mist accumulates at the bottom of the pressurized oil tank 2 and is forcedly circulated and atomized in the oil reflux line 9. Since oil is supplied from the discharge pump 3a at a preset frequency, when oil exceeding the atomization capability of the venturi mechanism 7 is supplied, for example, when oil that is not atomized by the venturi mechanism 7 is used and / or Or, when the atomization ability of the venturi mechanism 7 decreases, the oil increases in the pressurized oil tank 2 (this means that the initial lubrication condition is not satisfied), so it is necessary to issue an alarm. .
[0033]
Specifically, when a predetermined or more amount of oil, monitors for a certain level of oil is accumulated in that you transparent oil storage tank 1 and the pressurized oil tank 5, a transparent pressurized oil tank 5 The warning level (MAX.OIL EVEL) can be set as a judgment condition by printing, and by setting the level switch 8 in the pressurized oil tank 5 as described above, an alarm is output to the outside. be able to.
[0034]
When an alarm is output, the cause is investigated and countermeasures are taken, but the oil accumulated in the pressurized oil tank 5 must be discharged to the outside. In this case, the oil discharge valve mechanism (not shown) Needless to say, it can be solved by providing
[0035]
In addition, the oil supplied from the oil fixed amount discharge pump 3a is dropped in the site dome chamber 6a before joining the oil recirculation line 9 (in a state where only oil is mixed and no air is mixed). The operation of the oil metering discharge pump 3a may be confirmed by installing a drip detection sensor (not shown).
[0036]
【The invention's effect】
The present invention is configured as described above, and the recovery of the raw oil recovery mechanism is stored in either an oil reservoir formed on the base side of the oil mist conveyance line or a raw oil recovery unit formed in the chamber. The raw oil is recovered by the respray pump through the raw oil return pipe, or the raw oil collected in the raw oil recovery section formed in the chamber is recycled by the raw oil recovery mechanism. When recovering to the spray pump, air is forcibly fed from the oil reservoir formed on the base side of the oil fog transport line into the oil fog transport line, By providing a crude oil push-up air line that blows up the attached crude oil , the crude oil is gradually resprayed by the respray pump, so that the crude oil returns from the piping at the beginning of operation like a conventional oil mist lubrication unit. The fog amount is large due to Not only the phenomenon is in thus prevented, as a result of raw oil adhering to the oil mist conveyed in the line is blown in Namaabura pushing airline, the unit-side raw oil adhering to the oil mist conveying the line by gravity Since it is possible to prevent the oil from returning, it is possible to reduce the adverse effect of the raw oil that causes the variation in the oil amount as much as possible, and to produce an effect that even a small amount of oil can be supplied accurately and continuously.
[0039]
As described above, the oil mist lubrication unit of the present invention recovers and re-sprays most of the raw oil that causes the variation in the oil amount. It can be optimized and can be continuously atomized even with a small amount of oil without changing the fog amount, and the simple structure makes it suitable for mass production and low price. For example, the practical value of the present invention is significant.
[Brief description of the drawings]
FIG. 1 is an explanatory view showing a first embodiment of an oil mist lubrication unit according to the present invention.
FIG. 2 is an explanatory view showing a second embodiment of the oil mist lubrication unit.
[Explanation of symbols]
1 oil storage tank 2 oil mist generator 3 Determination oil supply pump 3a plunger pump 3b 3-port solenoid valve 4 raw oil recovery mechanism 4a oil reservoir 4b raw oil return pipe 4c re spray pump 4d second raw oil return line 5 pressure Pressure oil tank 6 Site dome 6 for monitoring oil dripping 6a Site dome chamber 7 Venturi mechanism 7a Venturi holder 7a ₁ Oil passage 7b Recirculation oil inflow chamber 7c Venturi body 7d Venturi upper passage 8 Level switch 9 Oil recirculation line 10 Oil 11 Metering oil supply line 12 Air bypass adjustment needle 13 Oil fog transport line 14 Chamber
14a Output port 15 Raw oil recovery mechanism
15a Oil reservoir
15b Fresh oil push-up air line
15c Fresh oil recovery department
15d raw oil return piping
15e Respray pump
15f Second crude oil reflux line

Claims (2)

An oil storage tank for storing lubricating oil;
A metered oil supply pump that is arranged in a branch of an air switching valve and sucks a fixed amount of oil from the oil storage tank and supplies the oil to an oil fog generator ;
An oil mist generating device for atomizing the oil supplied from the metering oil supply pump;
An oil mist conveying line disposed between the oil mist generating device and a chamber for spraying oil on a lubrication target ;
A raw oil recovery mechanism for recovering raw oil generated in the oil mist conveyance line and returning it to the oil storage tank or the pressurized oil tank ;
An oil mist lubrication unit comprising :
The raw oil recovery mechanism collects the raw oil collected in either the oil reservoir formed on the base side of the oil mist conveyance line or the raw oil recovery unit formed in the chamber through a raw oil return pipe. To be communicated and collected in a respray pump;
Oil mist lubrication unit characterized by In the raw oil recovery mechanism, when the raw oil collected in the raw oil recovery part formed in the chamber is recovered by the respray pump, the oil mist is generated from the oil reservoir part formed on the base side of the oil mist conveyance line. Providing a raw oil push-up air line that forcibly feeds air into the transfer line and blows up the raw oil adhering to the oil fog transfer line;
The oil mist lubrication unit according to claim 1.

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