MXPA99006059A - Device for production of oil mist - Google Patents

Abstract

The fine oil mist creating device has an atomising chamber into which oil and air are supplied under pressure. There is an atomising jet in this chamber at the end of the input line, and an output line to the application point. The atomising chamber (11) has a connection (17) at a point remote from the atomising jet (15) to a second chamber (12). The output line (19) is led into the second chamber, where it extends over almost the entire length of the chamber.

Description

DEVICE FOR GENERATING A FINE OIL FOG The invention relates to a device for generating a fine oil mist, in particular for the lubrication of tools in chip removal, including a spray chamber, in which a supply line carrying oil and air under pressure opens out , a spray nozzle disposed inside the spray chamber, at the end of the feed line, and an outlet line for transporting the aerosol that is generated in the chamber to the place of its application.

"~ * The invention is directed in particular to a device with which an oil mist that looks like smoke is generated, with which the so-called minimum lubrication of the tools and work pieces is obtained in the processing of the latter. A preferred area of application is the minimum lubrication by means of the spindle of the machine tools.In the application of this type of oil mists with a minimum concentration of oil, it is particularly important that the oil is distributed in the air in an extremely fine way It is only then that it can reliably be guaranteed that the oil mist is sufficient for the lubrication of workpieces and tools, but does not deposit on them in a disadvantageous manner. public, a device was provided in accordance with the preamble of claim 1. It has as its foundation an oil tank, in such a to that the spray chamber is arranged above the oil tank, separated from it by a separation sheet. On the underside of the oil tank, a piston pump drives oil, which feeds oil and air through a concentric line of double hose to the turbulence chamber that is located above the oil tank, under a pressure of approx. 6-10 bar. Inside the turbulence chamber, the line opens into a spray nozzle with approx. 1.8 mm nozzle diameter. The pulverized oil under the action of the high pressure of the air arrives like fog to a line of exit that ends in the camera of turbulence and takes through lines of hose and / or pipe to the place of application, especially to the tool of a machine tool. The separating sheet disposed between the oil tank and the turbulence chamber does not seal with the walls of the system, so that the droplets that were deposited in the turbulence chamber or an oil film can be collected again for reuse in the oil tank that is underneath. With the known device, a very fine oil mist can be generated, saving oil, quite acceptable for numerous applications. The present invention, however, aims to improve the generation of oil mist, in such a way that an oil mist with oil particles distributed in it in an extremely fine and homogeneous way can be obtained with greater reliability and reliability. The invention essentially achieves this objective with the features of claim 1 and, accordingly, is characterized in that the spray chamber has a junction with a second chamber at a location remote from the spray nozzle and because the outlet line It enters the second chamber and extends approximately its entire length. Suitably developments of the object of the invention and other advantageous embodiments are indicated in the sub-claims. The fundamental principle of the invention consists in sending the oil mist that is generated in the spray chamber through a second chamber, in which there is the possibility of further dividing the small particles of oil generated in the spray chamber, that is to say, to reduce its size and to eliminate with high reliability the oil particles with a too large size during the preparation of the oil mist.

To achieve the above, the second chamber disposed downstream of the spray chamber, ensures that the oil mist generated in the spray chamber does not immediately enter the outlet line, but must first pass through the second chamber. Only small oil particles, especially those capable of floating, can enter the line of exit, while heavy particles accumulate in the second chamber and deposit on their walls. Furthermore, the device according to the invention can be constructed in a particularly compact manner, with which an additional advantage is achieved. In particular, the device for generating the fine oil mist is not physically attached in a fixed manner to an oil tank or its dimensions, but is a unit independent of the total device, which in addition to the oil tank or the reserve tank of oil, includes the pump necessary to generate the pressure as well as the corresponding lines of hose and / or pipe, as well as a housing of the apparatus. Otherwise, the invention is better understood with the aid of the following detailed illustration of an exemplary embodiment shown by the attached drawing. The drawing shows a longitudinal section through the device to generate a mist of fine oil and its essential parts on an approximately natural scale. The device indicated as 10 includes a first chamber 11 and a second chamber 12 joined with fluid passage to it. Both chambers 11 and 12 are elongated and respectively have a relatively small cross section relative to their length. The first chamber 11 (hereinafter referred to as the "spray chamber") serves to generate an oil mist 13. In the drawing, on the upper front side of the spray chamber 11 a supply line indicated as 14 opens, which carries oil in small quantities and air in large quantities, under a relatively high pressure of approx. 6-10 bar. The not shown end of the supply line 14 is attached to a pump, for example, a piston pump controlled by frequency and stroke, which drives air and oil from an oil reservoir not shown either. As seen, the end of the feed line 14 that opens into the spray chamber 11, includes a spray nozzle 15. According to a preferred embodiment, this spray nozzle 15 has a plurality of openings, or , exit channels, for example six, of very small diameter. With the set of dashed lines in the drawing is intended to reproduce the • jet 16, which consists of air and oil, which comes under pressure from the spray nozzle 15, dividing the pressurized air to the oil into particles as small as possible, until that in the lower area of the device there is the oil mist indicated by 13. As already mentioned briefly, the spray chamber 11 is connected to the second chamber 12. This connection, for example, in the form of a tube or two perforations aligned with each other in the walls of the chambers, indicated in the drawing with 17. Said junction 17 is located near, but before the lower end of the spray chamber 11. In this way it is achieved that the aerosol containing particles of Fine oil comes out of the spray chamber 11, passes through the junction 17 and can enter the second chamber 12, which is indicated by the curved arrow, while the oil particles that are too small for such a transport and the oil adhered to the walls of the spray chamber 11, it can slide further down to the bottom of the spray chamber 11, where an oil collection line 18 opens. of oil collection 18 serves both as a feedback line for the oil that is deposited in the oil reservoir not shown, from which the oil is taken by driving in the feed line 14.

In the chamber 12 the end, for example made as a tube, of an outlet line 19 is inserted, which serves to take the aerosol 20 that reaches it to the place of application. As the drawing shows, the outlet line 19 passes through the second chamber 12 almost over its entire length. In this way it is achieved that the oil mist 13 also has to make the journey through the second chamber 12, before being able to enter "in the opening indicated with 19a of the outlet line 19. Thus, it is guaranteed that another selection takes place. between floating particles of oil, very light, and heavy oil particles, and only the smallest particles of oil inside the oil mist, go through the outlet line 19 to the workpiece, or the tool. heavy particles or those that were no longer divided by the movement of the oil mist 13 through the second chamber 12, can be deposited on the walls of the second chamber 12 or accumulate in its bottom and finally reach through junction 17 back to the oil collection or feedback line 18. As shown in the reproduction of the exemplary embodiment, the outlet line 19 extends into the second chamber 12 in its longitudinal direction , namely, centrally in the middle of the chamber. This results in the advantage that the oil mist transported to the second chamber 12 can come into contact with considerable surfaces, which are formed by the inner wall of the chamber 12 and the outer jacket of the line 19, so that increases the likelihood that larger oil particles will stick. For reasons of integrity, it is noted that a manometer is also connected to the second chamber 12, which, through the monitoring of the operating pressure, allows control over the operation as it should and the faults of the device. As the figure also illustrates, both chambers 11 and 12 are of the same size and are directly adjoining directly f block type, resulting in a compact unit. The preferred operating position of the device shown is that of the drawing, that is to say, the oil and the air end up coming from above in the spray chamber 11, and the oil mist 13 entering through the junction 17 from the chamber of spraying 11 in the second chamber 12, ascends to it from bottom to top, so that, to a certain degree, also the gravitational force can exert a positive action in the generation of oil distributed very finely in the oil mist within the camera 12. However, it is noted that the device also works satisfactorily when, instead of operating vertically as shown, it operates horizontally, especially in such a manner, that the spray chamber 11 is located below the second chamber 12. For in such a case to obtain a safe oil outlet from the spray chamber 11, the oil collection line 18 should not be disposed on the front side of the spray chamber 11, but on its bottom, which is then defined by a longitudinal wall.

Claims (8)

Claims

1. A device for generating a mist of fine oil, in particular in particular for the lubrication of tools in chip removal, which includes a spray chamber, in which a feed line carrying oil and air under pressure opens, a nozzle of spray disposed within the spray chamber, at the end of the feed line, and an outlet line for the transport of the aerosol that is generated in the chamber to the place of its application, characterized in that the spray chamber (11) presents a junction (17) to a second chamber (12) in a location remote from the spray nozzle (15) and in that the outlet line (19) enters the second chamber (12) and extends approximately throughout its entire length (12). length.

A device according to claim 1, characterized in that the spray chamber (11) has a relatively small cross section in relation to its length; because the feed line (14) opens into the spray chamber (11) essentially in the longitudinal direction thereof and because the junction (17) to the second chamber (12) is disposed near the end of the spray chamber (11). ) away from the spray nozzle (14).

3. A device according to claim 1 or 2, characterized in that an oil collection line (18) is connected to the underside of the spray chamber (11).

A device according to any of the preceding claims, characterized in that the second chamber (12) is arranged contiguous and parallel to the spray chamber (11) and because the outlet line (19) extends from the end of the second chamber (11). chamber (12) in the direction of the side where the feed line (14) opens into the spray chamber (11).

5. A device according to any of the preceding claims, characterized in that, on the one hand, the feed line (14) in the spray chamber (11), and on the other, the outlet line (19) in the second chamber (12), are essentially arranged at half the length of the respective chamber (11; 12).

6. A device according to claim 1 or any of the following, characterized in that the connection (17) between both chambers (11; 12) includes perforations aligned with each other in adjoining chamber walls.

7. A device in accordance with the claim 6, characterized in that both chambers (11; 12) are essentially of the same size and are assembled in a manner congruent to one another or one on top of the other, relative to a compact total device (10). A device according to claim 1 or any of the following, characterized in that the spray nozzle (15) has a plurality of nozzle openings of very small cross-section. EXTRACT The invention refers to a device with which an oil mist that looks like smoke is generated, with which the so-called minimum lubrication of the tools and work pieces is obtained in the processing of the latter. A preferred area of application is minimum lubrication through the spindle of machine tools.