JPH0658491A - Mist generator - Google Patents

Abstract

PURPOSE:To provide a mist generator capable of stably supplying a constant amount of mist, and, hard to be affected by temperature. CONSTITUTION:This mist generator 1 is composed of a tank 2 storing oil such as lubricating oil or the like, its cover 3, an atomizer 4 being attached to this cover 3 and atomizing oil to be supplied, a heating element 5 being attached to this atomizer 4 and heating oil and air up to the specified temperature, and an air feeding means 6 feeding the atomizer 4 with air, etc. An oil siphon 30 is installed in the tank 2, and oil is drawn up with this siphon 30, heating this oil up to the specified temperature by the heating element 5 in the midway and then it is fed to the atomizer 4 as in this way. The oil is heated just before its dripping to the atomizer 4 or being sprayed and fed, so that it comes a stable supply, and since its atomizing ratio is improved so well, a constant amount of mist is always feedable in a stable manner.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mist generating device for atomizing oil, and in particular, it can be used when supplying mist to necessary parts such as bearings and gears in various machines.

[0002]

[Background Art] With the increase in speed of machine tools, the lubrication part of the main shaft bearings and gears does not supply sufficient oil with the conventional lubrication system, and supplies sufficient lubricating oil unless the oil mist lubrication system is used. I can't. However, generally, in the oil mist generator, as shown in FIG. 6, when the oil temperature decreases, the atomization rate decreases, and when the oil temperature increases, the atomization rate increases, and the mist amount changes due to the influence of temperature. There is a tendency. As a result, sufficient lubricating oil could not be supplied to the necessary locations, and galling or seizure could occur.

Therefore, various mist generators have been developed in order to stably supply a constant amount of mist to a necessary portion such as a bearing of various machines. As one of them, a mist generator that controls the temperature of oil is known. According to this device, the oil is heated and kept at a predetermined temperature, and the oil is dripped into the atomizer. Further, in order to heat oil with a mist generator having a large oil tank, a method of installing a heater or the like at the bottom of the oil tank to heat the tank from the outside, or a method of directly installing a heater or the like in the oil tank Is taken.

[0004]

However, the method of installing a heater or the like at the bottom of a large oil tank requires a powerful heater or the like to warm the oil in the tank to a predetermined temperature.
Also, in the method of directly installing a heater etc. in the oil tank,
There has been a problem that carbon adheres to the heater and heating efficiency deteriorates. In these devices, since the entire oil tank must be warmed, a large amount of energy is required as a result of heating until the oil can be stably supplied, which is contrary to energy saving.

Further, even if the oil is warmed in the tank, when the oil is supplied to the atomizer, the heat is taken away by the adiabatic expansion of the compressed air (air) blown toward the oil, resulting in fog. Since the temperature drops before it is turned into oil, the oil cannot be atomized efficiently, and in the end, a certain amount of mist cannot be stably supplied. Further, in order to ensure safety in these devices, an empty-burn prevention detecting means is absolutely necessary. Further, in these devices, since a heater or the like is provided at the bottom or inside of the tank, there is a problem that maintenance is difficult.

It is an object of the present invention to provide a mist generator which is not easily affected by temperature and which can always stably supply a fixed amount of mist.

[0007]

SUMMARY OF THE INVENTION Therefore, according to the present invention, in a mist generator for dripping or jetting and supplying oil in a tank to an atomizer to atomize the oil by air, a pipeline for supplying oil and air is provided. A mist generator is configured by providing a heating element around the.

Here, the heating element may be made of a nichrome wire and the temperature may be controlled by the control means, or may be made of a ceramic heater.

[0009]

According to the present invention as described above, when the oil in the tank is dropped or jetted and supplied to the atomizer, it is warmed and atomized by the heating element provided around the pipeline for supplying the oil and air. Supplied to the vessel and atomized by air. The oil is warmed just before being supplied to the atomizer, and the air blown toward the oil is also warmed, so heat is not taken away easily,
The atomization rate does not decrease. Therefore, a constant amount of mist can be stably supplied, and thus the above-mentioned object can be achieved.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. In the present embodiment, an example in which oil is supplied to the atomizer by the dropping supply method will be described. FIG. 1 shows the entire vertical cross section of the mist generator according to this embodiment. Mist generator 1
Is a tank 2 for storing oil such as lubricating oil, a lid 3 attached to the tank 2, and a venturi type atomizer (hereinafter referred to as an atomizer) that is attached to the lid 3 and atomizes the oil that is dripped and supplied. ) 4
And a heating element 5 attached to the atomizer 4 for heating oil and air to a predetermined temperature, and an air supply means 6 for supplying compressed air (air) to the atomizer 4.

The tank 2 is formed in a substantially rectangular parallelepiped box shape that stores a predetermined amount of oil, for example, about 2 liters, and the lid 3 is attached to the upper portion of the tank 2 so that the oil in the tank 2 can be sealed. An oil suction pipe 30 for sucking oil in the tank 2 is attached to the lower surface of the lid 3, and a filter 31 is attached to the oil suction pipe 30. The oil suction pipe 30 communicates with the atomizer 4 mounted on the lid 3 via an oil supply passage 3A (see FIG. 3) formed from the lid 3 to the atomizer 4.

The lid 3 is also provided with an oil level switch 32, a pressure gauge 33 for displaying the pressure in the tank 2, a safety valve 34 for adjusting an abnormal pressure in the tank 2, and the like. A mist discharge pipe 35 is provided for sending the oil mist to a required portion such as a bearing or gear in various machines. Further, an oil adjusting needle 37 for adjusting the amount of oil sent to the atomizer 4 and an air bypass needle 36 for adjusting the mist pressure discharged from the mist discharge pipe 35 are provided.

The air supply means 6 is an air control means connected to the tank 2 via an air supply source 60 and a manifold 61.
62, a filter regulator 63, etc. arranged between the air supply source 60 and the manifold 61, and the manifold 61 includes a pressure gauge 64 indicating the air pressure of the air supply passage therein, and a pressure switch. 65 and are installed. From the air supply means 6 to the venturi 4, the tank 2
And is blown through the air supply path 2A formed over the lid 3. Further, on the other side surface of the tank 2, a level meter 20 that can see the level of oil in the tank 2 is attached.

The details of the atomizer 4 are shown in FIGS. As shown in FIG. 3, the atomizer 4 is provided on a substantially rectangular block-shaped atomizer main body (hereinafter referred to as the main body) 40 fixed to the upper surface of the lid 3 and on a vertical center line inside the main body 40. Transparent pipe-shaped sight glass 41, a drip gland 43 provided on the upper portion of the sight glass 41 via a gasket 42, an upper main body 45 covered on the upper portion of the main body 40 via a gasket 44, and a main body. A venturi holder 47 that is embedded in the lid 3 of the oil tank 2 below the bottom 40 and is fixed via a gasket 46, a venturi member 48 that is housed in the venturi holder 47 on the center line, and the bottom surface of the lid 3. And a mist discharge pipe 49 communicating with the venturi holder 47.

As shown in FIG. 3, the oil passage 3A passing through the inside of the main body 40 is communicated with the oil suction pipe 30 and the upper main body 45.
The drip gland 43 communicates with the oil passage formed in the. The main body 40 is formed with a horizontal sight port 40B penetrating the main body 40 in the front-back direction of the atomizer 4 (orthogonal to the plane of FIG. 1).
You can see.

The venturi holder 47 is formed of a stepped columnar member having a large diameter and a small diameter. As shown in FIG. 4, over the venturi holder 47, the main body 40, and the upper main body 45,
An air flow path communicating with the air supply path 2A from the air supply means 6 and communicating with the venturi member 48 side therein.
50 are formed. That is, the air passages 50 are radially arranged as shown in FIG. 5, and the respective passages advance from the air supply passage 2A toward the upper main body 45, and then return to the venturi holder 47 again. First and second air outlet holes 51A, 48 formed on the side of the venturi member 48
It communicates with C.

As shown in FIGS. 3 and 4, the venturi member 48 is composed of two upper and lower parts, and the upper venturi member 48A.
Is supported by a collar 51, and this collar 51 is supported by a lower venturi member 48B provided from the lower portion of the venturi holder 47 toward the upper side. A nozzle 52 is provided between the upper and lower venturi members 48A and 48B, and the lower portion of the nozzle 52 has a tapered shape that tapers downward. The taper portion of the nozzle 52 is arranged to face the taper portion formed on the upper portion of the lower venturi member 48B with a slight gap, and this gap is provided to the air blown out from the first air blowing hole 51A. However, the throat portion 53 blows out toward the supplied oil.

Inside the lower venturi member 48B, a substantially inverted funnel-shaped atomizing chamber 54 is formed so that the generated mist is efficiently diffused, and the atomizing chamber 54 is provided with a second air chamber. The air outlet hole 48C is connected to the first air outlet hole
The oil can be more reliably atomized with the 51A. Also, as shown in FIG. 1, the lower venturi member.
Below the 48B, a mist discharge pipe 49 having a mist discharge hole is attached from the lower surface of the lid 3 while communicating with the atomization chamber 54.

Around the main body 40 of the atomizer 4 (both side surfaces in the embodiment), heating elements 5 are attached by screws 56, respectively, as shown in FIGS. The heating element 5 is composed of a nichrome wire, and the temperature is controlled by the control means 7 as shown in FIG. 1, and when the heating element 5 heats to a predetermined temperature, the oil passing through the oil passage 3A in the main body 40 And, the air passing through the air flow path 50 in the main body 40 can be warmed.

Next, the operation of this embodiment will be described. First,
The heating element 5 is energized to warm the heating element 5 to a predetermined temperature and warm the main body 40. Next, adjust the air bypass needle 36,
Air is sent to the atomizer 4 from the air control means 62 of the air supply means 6. The air passes from the air supply passage 2A in the lid 3 through a large number of air passages 50, and has first and second air blowing holes 51, respectively.
It is blown into A and 48C, and is blown into the atomization chamber 54 from the blowout hole 51A through the throat portion 53. By this,
The inside of the atomizer 4 becomes a negative pressure, and the oil in the oil tank 2 is sucked up via the oil suction pipe 30, and the lid 3, the main body 40, and the upper main body.
It is guided into the drip gland 43 through the oil passage 3A in 45,
Supplied from there.

When the supplied oil reaches the atomizing chamber 54 from the inside of the sight glass 41 through the upper venturi member 48A and the nozzle 52, the first air blowing hole 51A and the throat portion 53 are provided.
The air blown from and the second air outlet hole 48C
It is atomized by the air blown from. This mist is supplied from a mist discharge pipe 35 to a predetermined lubrication part such as a bearing part or a gear of various machines by a mist supply means (not shown). Adjust the mist amount with the air bypass needle.
36 and the oil adjusting needle 37 are properly adjusted.

According to this embodiment as described above, there are the following effects. That is, two heating elements 5 that are heaters are attached to the atomizer 4, and the heating elements 5 warm the oil and air passing through the inside of the atomizer 4 to a predetermined temperature, so that the oil is atomized. It will be heated just before the oil is supplied and the oil supply will be stable. Therefore, the atomization rate is stable particularly in a low temperature range, and a certain amount of mist can be stably supplied.

Further, since the oil is warmed immediately before being atomized, it is not affected by the viscosity of the oil, and it becomes possible to use an oil having a viscosity in a wide range. Furthermore, the oil passing through the inside of the atomizer 4 is warmed to a predetermined temperature by the heating element 5. Since this oil has a small capacity, it takes a short time to warm it to a predetermined temperature, and a stable mist is supplied. There is also an effect that it takes a short time to complete.

Further, since the oil passing through the inside of the atomizer 4 has a small capacity, a small heating element 5 is sufficient to warm it to a predetermined temperature. Therefore, the capacity of the heater may be small, which is an energy-saving measure and allows the device to be compact. Moreover, since the heating element 5 can be easily attached to and detached from the atomizer 4, maintenance is also easy.

The present invention is not limited to the above-mentioned embodiment, but includes the following modifications. That is, in the above-described embodiment, the mist is formed by the dropping supply system in which the pressure of the pump is lowered to drip the oil and supply it to the atomizer 4. However, the invention is not limited to this. The intermittent oil supply system may be used to supply the atomizer 4 with the oil.

In the above embodiment, the electric heating means is controlled in temperature by controlling the current and voltage flowing through the nichrome wire. However, a heating element and a control means such as a ceramic heater are integrated. You can also do it.

Further, in the above-mentioned embodiment, two heating elements 5 are attached to the venturi 4, but the point is that the venturi 4 can be warmed. One may be attached.

In addition, the specific structure, shape and the like for carrying out the present invention may be other structures and the like as long as the object of the present invention can be achieved.

[0029]

As described above, according to the mist generator of the present invention, there is an effect that it is hardly affected by temperature and a constant amount of mist can be constantly and stably supplied.

[Brief description of drawings]

FIG. 1 is an overall view of a mist generating device according to an embodiment of the present invention.

FIG. 2 is a plan view showing an atomizer of the mist generator.

3 is a sectional view taken along line III-III in FIG.

FIG. 4 is a sectional view taken along line IV-IV in FIG.

FIG. 5 is a perspective view of an air flow path.

FIG. 6 is a diagram showing the relationship between general temperature and the supply amount of oil.

[Explanation of symbols]

 1 Mist generator 2 Tank 4 Atomizer 5 Heating element 6 Air supply means

Front page continued (72) Inventor Masaaki Sasaki 3-27-3 Sama Sakuma, Gyoda City, Saitama Saitama Factory (72) Inventor Hiroyuki Kawabata 3-27-3 Sama, Gyoda, Saitama Taco Stock Company Saitama factory

Claims (3)

[Claims] 1. A mist generating device for supplying oil in a tank to an atomizer to atomize the oil by air, and a pipe for supplying oil and a pipe for supplying air around the pipe. A mist generator characterized in that the paths are arranged radially and a heating element is provided. 2. The mist generating device according to claim 1, wherein the heating element is made of a nichrome wire, and the temperature is controlled by a control means. 3. The mist generating device according to claim 1, wherein the heating element is a ceramic heater.