DE19721650C2 - Device for aerosol production - Google Patents

Description

The invention relates to a device for aerosols in particular in a cooling lubricating device for Tools or workpieces, with a 1. Injektorvorrich tion, a first carrier gas and a first liquid to are feasible and to a first aerosol chamber a Gas jet with liquid droplets contained therein for Formation of a first aerosol releases.

Aerosols are used in many areas of technology Here, for example, inhalers in the Medical technology, humidifiers in home appliances or the application of cleaning or protective agents etc. should be pointed out. In addition, it is too known aerosols for lubricating bearings or even to Cooling or lubricating a tool or a work piece to use, of which in the following example is assumed.

Tools and workpieces are subject to a cutting Processing high frictional forces, resulting in a strong  Heat development leads. It is therefore necessary that Friction of said parts by applying a cooling reduce lubricant, thereby simultaneously the Parts are cooled. In the past, it has usually been since long-known full jet cooling applied, in which the Cooling lubricant in a relatively large amount in a Flüs full jet on the surfaces to be cooled is brought. However, on the one hand there is a lot high consumption of cooling lubricant, causing the operation the cooling lubricator is expensive, on the other hand it is necessary for ecological reasons, the used cooling to dispose of lubricants in an environmentally friendly manner, which is expensive dig and also expensive.

In the so-called Minimal lubrication technology is a liquid cooling lubricant tel in a nozzle in a stream of air. To this The purpose of the nozzle is the liquid coolant and liquid the air is supplied in separate lines, the off emerging from the nozzle at a relatively high speed Air flow with the coolant after discharge mixed from the nozzle. Systems are also known in the art the generation of the mixture mist within the nozzle he follows. The spray of coolant-air-Ge Mix is applied directly to the surfaces to be treated applied, resulting in a good cooling and Schmierwir kung on the tools and workpieces can be achieved. Furthermore, there is the advantage that the consumption of Coolant significantly reduced and therefore also the problem of disposal is mitigated. However, that is Coolant mist generated in the aforementioned manner relatively inhomogeneous in droplet size. This is indeed in the so-called external cooling, in which the Coolant from outside on the parts to be cooled  is applied, relatively unproblematic, however, occur Problems with the so-called internal cooling on, in the the coolant mist through the tool in the tool end, inner channels right into the contact area is conveyed between the tool and the workpiece. larger Droplets of the coolant mist are due to the Rotation of the tool also set in rotation and accelerated radially outwards, so that you at the Knock down the walls of the channels. This leads to a uneven promotion of cooling lubricant and in particular to a spattering. similar Problems occur when the coolant mist geför by relatively long pipe or hose lines should be changed.

From DE 30 34 941 A1, from the in the preamble of Claim 1 is assumed, it is known for cooling and lubrication of rotating parts next to a conven oil lubrication in addition to use an aerosol, the very fine, suspended in the air flow oil particles ent holds. For this purpose, by means of a by a Injector nozzle flowing air flow oil from a supply sucked in and together with the air in an aerosolkam atomized, whereby the heavy oil particles, which at the Put the bottom or the wall of the aerosol chamber into the Can flow back stock. Despite the deposition of however, heavy oil particles still remain in the aerosol Particles of different sizes, being above it In addition, according to DE 30 34 941 A1, the particle composition does not change the size and size. Thus is also one Adaptation of the cooling or lubrication behavior to the respective requirement, depending on material and Bear not be given.

The invention is based on the object, a Vorrich to create aerosol production of the type mentioned, with an aerosol with user-to-varying Particle size can be reliably obtained.

This object is achieved with a device for aerosol generation solved in that at least one 2. Injector device is provided which is a 2nd carrier gas and a 2nd liquid are supplied and the a second aerosol chamber containing a gas jet with it NEN liquid droplets to form a second aerosol delivers, with a removal chamber is provided, the optionally the 1st and / or 2nd aerosol can be supplied and from the at least one sampling line to a Ver place of use leads.

In the apparatus according to the invention, the first Flüs sity, in particular a lubricating oil, in a jet the first carrier gas, preferably air, atomized. The 1. Carrier gas with the liquid droplets is pressurized into the first aerosol chamber of the injector device tet, wherein a first aerosol is formed. The size of the Particles and the amount of aerosol can in the inventive preferably be changed by this device, that both the amount of the 1st injector device supplied 1st carrier gas and / or the amount of added 1. Fluid over user to set Flow control valves can be controlled separately. In addition, the greasiness can be achieved in this way of the 1st aerosol vary continuously.

In addition to the first aerosol according to the invention einin at least one second aerosol produced in a known manner by  a 2nd fluid identical to the 1st fluid or may be different from this, in one Jet of a second carrier gas, preferably also air, is atomized. The 2nd carrier gas with the liquid droplets are introduced under pressure into the second aerosol chamber conducts, whereby in this a second aerosol is formed. Again, the size of the particles and the Aero solmenge be changed so that the amount of the 2. injector device supplied second carrier gas and / or the amount of the supplied 2nd liquid over ent speaking flow control valves separated from the user can be adjusted.

In the aerosol chambers of the device according to the invention the user is thus a first aerosol and at least one thereof optionally different 2. Aerosol for Available. The aerosols can be both in terms of the type of liquid, the particle size and also the differ in their amount of liquid contained. Of the User then has a choice, from the aerosol chambers or to supply a plurality of aerosols to a removal chamber, in the aerosols mix with each other. Of the Extraction chamber leads to at least one sampling line a point of consumption, d. H. a nozzle or a Tool.

In this way, the user is not only different aerosols available at any time, it is him beyond that possible, these aerosols in any Mix with each other, thus the aerosol in its composition to the lubrication and cooling requirements adaptations. The Vorrich with the invention range of possible variations range from a lean aerosol with very small particle sizes up to Too very rich aerosols or air-oil mixtures. in the Extreme case can also be the training of an oil foam or  the alternate formation of small air and oil plugs to be watched.

In a preferred embodiment it is provided that the Amount of the first aerosol supplied to the sampling chamber and / or the amount of the extraction chamber 2 supplied. Aerosols independently from the user through corresponding flow control valves are set can.

Also, the withdrawal from the withdrawal chamber withdrawal tion is a corresponding flow control valve supplied orders, so that the amount of the extraction chamber entnom aerosol or aerosol mixture is controllable.

Especially if a variety of independent aerosol it is useful to have this one separate separate, common removal chamber downstream. If only a small number of aerosol chambers, for example 2 or 3 chambers are provided, one of the aerosol at the same time form the extraction chamber, whereby the design effort is reduced.

Further details of the invention are made the following description of embodiments with reference to the drawing. It shows gene:

Fig. 1 is a simplified arrangement diagram of a first embodiment;

Fig. 2 is a comparison with FIG. 1 modified second embodiment and

Fig. 3 is a vertical section through a fiction, contemporary device for aerosol production.

According to the first embodiment shown only schematically in FIG. 1, a first carrier gas A1, in which a flow control valve V1 is arranged, a first carrier gas, for example air L1, can be supplied under pressure via a first gas line 1 . A 1 . Liquid line 2 , in which also a flow control valve V2 angeord net, opens into the first gas line 1 and serves to supply a first liquid F1, in particular a lubricating oil. The air L1 flowing in the first gas line 1 travels along with oil droplets from the first liquid line 2 , so that the air flow with the liquid droplets forms a first aerosol when it is introduced into the first aerosol chamber A1. Whose composition can be influenced by a position of the Durchflußsteuerventile V1 and V2 from Benut zer in the desired manner.

Parallel to the structure described so far is a similar, a 2nd aerosol chamber A2 comprehensive structure is provided, via a second gas line 3 , which contains a Durchflußsteuerventil V3, a second carrier gas L2 can be supplied, which is also to air or also another gas can act. The 2nd gas ruptures when flowing through the second gas line 3 Flüssigkeitströpf surfaces of a second liquid F2 from a device in the 2nd Gaslei 3 opening 2 liquid line 4 , in which also a Durchflußsteuerventil V4 is arranged. In the second aerosol chamber A2, it is thus possible to form a second aerosol which differs from the first aerosol.

On the wall of the aerosol chambers A1 and A2 precipitating larger liquid droplets can  in a manner not shown to the respective liquid be reduced.

It should be noted that in a similar way a lot number of aerosol chambers parallel to each other can be, in each of which different aerosols be generated and provided.

Both aerosol chambers A1 and A2 are connected to a nachge switched extraction chamber K. For this purpose, a first connecting line 5 is provided between the first aerosol chamber A1 and the removal chamber K, in which a Durchflußsteuerventil V5 is arranged. In a similar way, the second aerosol chamber A2 communicates with the withdrawal chamber K via a second connecting line 6 , which contains a flow control valve V6. By opening or closing the flow control valves V5 and / or V6, the user can decide whether in the sampling chamber K, only the first aerosol, only the second aerosol or possibly a mixture of these pending. It can be varied in any way by appropriate settings of the flow control valves V5 and V6, the mixing ratio.

From the sampling chamber K, a sampling line 7 leads to a point of consumption, for example a nozzle, whereby a flow control valve V7 for adjusting the aerosol flow is also provided in the sampling line 7 .

Fig. 2 shows a comparison with the embodiment of FIG. 1 modified embodiment, wherein like-like components are provided with the same reference numerals. The embodiment of FIG. 2 differs from that of FIG. 1 only in that the removal chamber K simultaneously forms the second aerosol A2, by the second gas line 3 opens directly into the Entnah mekammer K.

Fig. 3 shows a structural configuration of the structure shown schematically in Fig. 2. A container 30 of a cooling lubricating device, of which only one housing wall 30 a is indicated, has in its unte ren area a stock SM to liquid Kühlschmiermit tel, in particular oil. The container 30 is formed in well-known manner as a pressure vessel and has one or more devices 10 for aerosol production.

The device 10 comprises an inner tube 15 which has a riser 16 inside, and to the inner tube 15 on the outside coaxially spaced angeord netes jacket tube 12th The jacket tube 12 is in turn surrounded by a coaxially spaced outer tube 11 , wherein the lower ends of the tubes 15 , 12 and 11 are provided with a common cover plate 14 and immersed in the lubricant reservoir SM. At its upper end, the inner tube 15 passes into an injector via 19 , which is arranged coaxially with the riser 16 and associated with this blind bore 20 , branch off from the plurality of radial bores 21 , which open on the outer surface of the injector body 19 . In jektiorkörper 19 has on its outer surface further more distributed over the circumference Axialnuten 22 , the one formed between the inner tube 15 and the jacket tube 12 first annular channel 17 on the underside of the injector body 19 with an above the injector body 19 in the jacket tube 12th connect formed first aerosol A1, wherein the radial bores 21 open into the axial grooves 22 .

Via a non-illustrated first air line 18 , in which a Durchflußsteuerventil V1 is arranged, air L1 can be introduced into the first annular channel 17 , which is closed on the underside by the cover plate. The air L1 flows from the first annular channel 17 through the Axialnu th 22 of the injector body 19 and thereby tears from the radial bores 21 liquid droplets from the lubricant reservoir SM through a bore 31 in the cover plate 14 in the riser 16 of the inner tube 15 and from this over the blind bore 20 of the injector body 19 into the radial bores 21 pass. In this way, in the first aerosol chamber A1, which is covered on the upper side by a jacket tube 12 and the outer tube 11 überdec kenden hood 25 , a first aerosol generated.

The outer tube 11 is in its upper part außensei tig surrounded by a pipe socket-shaped projection 28 a of a hous seblocks 28 , via which the device 10 is attached to the housing 30 . Between the rohrstutzenförmi conditions approach 28 a and the outer tube 11 , a second annular channel 24 is formed, which is closed on the underside of a cover plate 26 and extends to a above the hood 25 in the housing block 28 formed second aerosol chamber A2. Via a non-illustrated second air line 32 , which has a Durchflußsteuerventil V3, air L2 can be introduced into the second annular channel 24 . The air L2 flows in the second annular channel 24 on the outside of the outer tube 11 upwards and thereby tears from radial bores 23 which are formed in the outer tube 11 , droplets of a liquid F2, which in a between the outer tube 11 and the Man telrohr 12 formed annular gap 13 which is supplied via a further formed in the lower cover plate 14 bore 33 from the lubricant reservoir SM with the liq fluid F2. Thus, a second aerosol is generated in the 2nd aerosol chamber A2.

The second aerosol chamber A2 simultaneously forms a removal chamber K from the one or more extraction lines 29 lead to a point of consumption. 1. The aerosol can from the first aerosol chamber A1 via an out in the hood 25 formed through hole to be introduced into the aerosol chamber 2. A2 or removal chamber K 27th

Depending on the state of the Durchflußsteuerventile V1 and V3 in the first and second air line 18 , 32 is located in the removal chamber K either only the first aerosol from the first aerosol chamber or only the second aerosol directly in the sampling chamber K. is generated, or even a Mi tion of both, the user by the SET ment of the internal pressure in the container 30 , ie the lubricant medium pressure, and the setting of the flow control valves V1 and V3 change the composition of the aerosols or the aerosol mixture in the desired manner can.

Claims (10)

1. A device for generating aerosols, in particular in a cooling lubricating device for tools or workpieces, comprising a first injector device, to which a first carrier gas (L1) and a first liquid (F1) can be fed and which are connected to a first aerosol chamber (A1) with liquid contained therein keitströpfchen to form a first aerosol from ab, characterized in that at least a second injector device is provided, which is a 2nd carrier gas (L2) and a second liquid (F2) feed bar and the to a 2 Aerosol chamber (A2) a gas jet with droplets contained therein to emit a second Aersol, wherein a removal chamber (K) is provided, which is optionally the first and / or second aerosol can be supplied and from the at least one withdrawal line ( 7 ; 29 ) leads to a point of consumption. 2. Device according to claim 1, characterized gekennzeich net, that the amount of the 1st injector device supplied first carrier gas (L1) and / or the 1. Liquid (F1) is controllable.   3. Apparatus according to claim 1 or 2, characterized marked records that the amount of the removal chamber (K) fed 1. aerosol is controllable. 4. Device according to one of claims 1 to 3, there characterized in that the amount of the 2nd In second carrier gas (L2) and / or the second liquid (F2) is controllable. 5. Device according to one of claims 1 to 4, since characterized in that the amount of the Ent receiving chamber (K) supplied 2. aerosols controllable is. 6. Device according to one of claims 1 to 5, since characterized in that the amount of the Ent Removal chamber (K) taken aerosols or aerosol Mixed is controllable. 7. Device according to one of claims 1 to 4 and 6, since characterized in that the second aerosol chamber (A2) at the same time forms the removal chamber (K). 8. Device according to one of claims 1 to 7, since characterized in that the carrier gas is air. 9. Device according to one of claims 1 to 8, since characterized in that the 1st and the 2nd Flüs are different. 10. Device according to one of claims 1 to 9, since characterized in that the liquid Lubricant, especially oil, is.