JP4198783B2 - Oil mist separator - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an oil mist separator used in an oil mist lubrication system for machine tools and the like, and in particular, used in an oil mist lubrication system for performing mist lubrication of a bearing portion of a high-speed main spindle of a machine tool or a gear in a gear box. The present invention relates to an oil mist separator.
[0002]
[Prior art]
In general, mist lubrication of a high-speed main shaft bearing of a machine tool is required to be performed at a flow rate that does not cause excessive supply by fine mist having a small mist particle size in order to suppress temperature rise due to oil agitation. On the other hand, unlike the bearing lubrication, the gears in the gear box are lubricated by oil bath lubrication or forced lubrication by a pump.
[0003]
In some machines, the gears are also lubricated by mist lubrication. The gear mist lubrication is required to be performed with a larger amount of oil by rough mist having a larger mist particle size than that for bearing lubrication in order to prevent seizure of the gear.
[0004]
For this reason, when both the bearing lubrication and the gear lubrication are performed by mist lubrication, dedicated mist generators are employed in order to satisfy different requirements for both lubrications.
[0005]
[Problems to be solved by the invention]
In a conventional oil mist lubrication system, liquid-like condensed oil is generated in the middle of the piping circuit by adhering to the wall surface of the piping circuit, and this is agglomerated and excessively supplied to bearings, etc. In particular, a bearing that requires an appropriate amount of lubrication with fine mist causes abnormal heat generation due to agitation of excessive supply of oil, and causes a decrease in bearing life.
[0006]
Further, when both the bearing lubrication and the gear lubrication are performed by mist lubrication, two mist generators are required to satisfy different requirements for both lubrications, resulting in a complicated apparatus configuration. .
[0007]
The present invention has been made by paying attention to the above-described problems, and is an instrument that allows a mist lubrication of a bearing and a mist lubrication of a gear to be stably and accurately performed by one mist generating device. It aims to provide an oil mist separator.
[0008]
[Means for Solving the Problems]
In order to achieve the above-mentioned object, an oil mist separator according to the present invention is an oil mist separator provided in the middle of an oil mist pipe for supplying mist air from a mist generator to a bearing lubrication part and a gear lubrication part. ,
The oil mist has a box body defining an expansion chamber having a cross sectional area greater than the cross-sectional area of the pipe, mist air inlet port is provided on one surface of the box body, the other face of the box body A first outlet port is provided, and a second outlet port is provided at the bottom of the box ,
The first outlet port protruding into the expansion chamber by an insertion tube is provided at a position higher than the inlet port, and the inlet port and the insertion tube of the first outlet port face each other alternately.
Of the mist air that has flowed into the expansion chamber from the inlet port, most of the mist air by the fine mist having a small mist particle size and small weight rides on the first air pipe from the insertion tube on the upper side of the expansion chamber. Mist air generated by the condensed oil and heavy rough mist having a large mist particle size generated in the pipe connected to the bearing lubrication part by the pipe communicating with the outlet port of the mist generator does not ride on the airflow. , And flows so as to drop below the expansion chamber due to gravity, and is supplied to the gear lubrication portion by the pipe communicating with the second outlet port .
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below in detail with reference to the drawings.
[0012]
FIG. 1 shows one embodiment of an oil mist lubrication system including an oil mist separator according to the present invention.
[0013]
In FIG. 1, 10 indicates a mist generating device, and 20 indicates an oil mist separator provided in the middle of an oil mist pipe (pipes 40, 42, 44 described later).
[0014]
The oil mist separator 20 is constituted by a cubic box 22. The box 22 defines an expansion chamber 24 having a cross-sectional area larger than a passage cross-sectional area of an oil mist pipe (pipes 40, 42, and 44 described later).
[0015]
The oil mist separator 20 has a mist air inlet port 26 on one surface portion 22 a of the box body 22, a first outlet port 28 on the other surface portion 22 b of the box body 22, and a bottom surface of the box body 22. A second outlet port 30 is provided in the portion 22c.
[0016]
In this case, the first outlet port 28 is provided at a position higher than the inlet port 26, and the inlet port 26 and the first outlet port 28 face each other alternately. In addition, since the 2nd exit port 30 exists in the bottom face part 22c of the box 22, it exists in a position lower than any of the entrance port 26 and the 2nd exit port 30. FIG.
[0017]
The first outlet port 28 protrudes into the expansion chamber 24 by the insertion tube 32.
[0018]
The inlet port 26 is connected to the mist generator 10 by a pipe 40 and is supplied with mist air from the mist generator 10.
[0019]
In this case, the mist generating device 10 generates mist air by fine mist for bearing mist lubrication with a small mist particle size.
[0020]
The first outlet port 28 is a mist air outlet port for bearing mist lubrication, and communicates with the bearing lubrication part 50 by a pipe 42.
[0021]
The second outlet port 30 is a mist air outlet port for gear mist lubrication, and communicates with the gear lubrication unit 60 by a pipe 44.
[0022]
In the oil mist separator 20 configured as described above, of the mist air that has flowed into the expansion chamber 24 from the inlet port 26, most of the mist air from the fine mist having a small mist particle size and small weight rides on the airflow. It flows from the insertion pipe 32 on the upper side of the expansion chamber 24 to the first outlet port 28, and is supplied to the bearing lubrication unit 50 through the pipe 42.
[0023]
On the other hand, condensed oil generated in the piping circuit (pipe 40) or mist air due to heavy rough mist having a large mist particle size flows on the expansion chamber 24 so as not to flow on the airflow but to fall below the expansion chamber 24 due to gravity. Is supplied to the gear lubrication unit 60 through the pipe 42 from the second outlet port 30 opened at the bottom of the gear.
[0024]
As described above, in the expansion chamber 24, mist air suitable for bearing mist lubrication by fine mist having a small mist particle diameter and mist air suitable for gear mist lubrication by condensed oil or rough mist having a large mist particle diameter are used. Naturally separated, an appropriate amount of mist air by fine mist with a small mist particle size is supplied to the bearing lubrication unit 50, and a large amount of mist air by rough mist with a large amount of condensed oil and mist particle size is supplied to the gear lubrication unit 60 as a whole. Is done.
[0025]
As a result, it is avoided that the condensed oil is agglomerated and excessively supplied to the bearing lubrication unit 50, and abnormal heat generation due to excessive supply of the oil is prevented. A large amount of mist air from rough mist having a large mist particle size is supplied as a whole, and gear lubrication is performed satisfactorily. A single mist generator 10 performs stable and accurate mist lubrication of the bearing and gear mist. Will come to be.
[0026]
In addition, since the inlet port 26, the insertion tube 32, and the first outlet port 28 face each other alternately, mist air generated by rough mist having a large mist particle diameter may be direct current from the inlet port 26 to the first outlet port 28. Absent.
[0027]
Further, since the first outlet port 28 protrudes into the expansion chamber 24 by the insertion tube 32, the liquid flow caused by the oil droplets attached to the inner wall surface of the expansion chamber 24 does not flow into the first outlet port 28, Only mist air suitable for bearing mist lubrication by fine mist having a small mist particle diameter flows through the first outlet port 28. This also allows the mist lubrication of the bearing to be performed with good stability.
[0028]
Further, the expansion chamber 24 has a cross-sectional area larger than the passage cross-sectional area of the oil mist pipe and has an internal volume. ), The mist air temporarily stays in the expansion chamber 24, and the expansion chamber 24 functions as a buffer chamber, so that the concentration of the mist air is stabilized.
[0029]
As described above, the state of mist lubrication is stabilized and good mist lubrication is performed.
[0030]
In the above, the present invention has been described in detail with respect to specific embodiments. However, the present invention is not limited thereto, and various embodiments are possible within the scope of the present invention. This will be apparent to those skilled in the art.
[0031]
【The invention's effect】
As can be understood from the above description, according to the oil mist separator of the present invention, low-weight fine mist with a small mist particle size and condensed rough oil and heavy rough mist with a large mist particle size are separated by gravity in an expansion chamber. Most of the mist air generated by fine mist with a small mist particle size flows in the airflow to the first outlet port on the upper side of the expansion chamber, while the condensed oil generated in the piping circuit and the rough mist with a large mist particle size Mist air does not get on the airflow, flows so as to fall below the expansion chamber due to gravity, and flows to the second outlet port opened at the bottom surface of the expansion chamber.
[0032]
As a result, mist air from fine mist with a small mist particle diameter is supplied to the bearing lubrication part from the first outlet port, and mist air from rough mist with large condensed oil and mist particle diameter is fed to the gear lubrication part from the second outlet port. The mist lubrication of the bearing and the mist lubrication of the gear can be performed stably and accurately by one mist generator.
[0033]
In addition, since the first outlet port is provided at a position higher than the inlet port, and the inlet port and the first outlet port face each other alternately, mist air due to rough mist having a large mist particle size is first from the inlet port. Mist air from fine mist with small mist particle size and mist air with rough mist with large mist particle size are reliably separated without direct current to the outlet port, and mist lubrication of bearings and gears are performed by one mist generator. This makes it possible to perform the mist lubrication with good stability and accuracy.
[0034]
Furthermore, since the first outlet port protrudes into the expansion chamber by the insertion tube, the liquid flow caused by the oil droplets attached to the inner wall surface of the expansion chamber does not flow into the first outlet port. Only mist air suitable for bearing mist lubrication by fine mist having a small mist particle diameter flows through the mist, and the mist lubrication of the bearing is performed with good stability.
[Brief description of the drawings]
FIG. 1 is an explanatory view showing one embodiment of an oil mist lubrication system including an oil mist separator according to the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Mist generator 20 Oil mist separator 22 Box 24 Expansion chamber 26 Inlet port 28 First outlet port 30 Second outlet port 32 Insertion pipes 40, 42, 44 Pipe 50 Bearing lubrication part 60 Gear lubrication part

Claims (1)

An oil mist separator (20) provided in the middle of an oil mist pipe (40, 42, 44) for supplying mist air from the mist generator (10) to the bearing lubrication part (50) and the gear lubrication part (60). And
The oil mist pipe (40, 42, 44) has a box body (22) defining an expansion chamber (24) having a larger cross-sectional area than the cross-sectional area of one of the surface portions (22a of the box body (22) ) Is provided with a mist air inlet port (26), the other surface (22b) of the box (22) is provided with a first outlet port (28), and the box (22) has a bottom surface ( 22c) is provided with a second outlet port (30) ,
The first outlet port (28) protruding into the expansion chamber (24) by the insertion tube (32) is provided at a position higher than the inlet port (26), and the inlet port (26) and the first outlet port (26) are provided. The insertion port (32) of the outlet port (28) is alternately facing,
Of the mist air that has flowed into the expansion chamber (24) from the inlet port (26), most of the mist air by fine mist having a small mist particle size and having a small mist particle size is carried on the air flow and flows into the expansion chamber (24). It is supplied to the bearing lubrication part (50) by the pipe (42) communicating with the first outlet port (28) from the insertion pipe (32) on the upper side, and also communicated with the mist generating device (10). Condensed oil generated in the pipe (40) and mist air due to heavy rough mist having a large mist particle diameter do not ride on the airflow but flow so as to fall below the expansion chamber (24) due to gravity, and the second outlet port oil mist component, characterized in that it is configured to be supplied to the gear lubricant portion (60) by said pipe communicating (44) to (30) Vessel.

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