CN111590386B - Noise reduction device for micro-lubrication and injection system - Google Patents

Noise reduction device for micro-lubrication and injection system Download PDF

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CN111590386B
CN111590386B CN202010389091.8A CN202010389091A CN111590386B CN 111590386 B CN111590386 B CN 111590386B CN 202010389091 A CN202010389091 A CN 202010389091A CN 111590386 B CN111590386 B CN 111590386B
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noise reduction
oil mist
reduction gas
noise
gas outlet
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CN111590386A (en
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袁松梅
张文杰
朱光远
孔晓瑶
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Beihang University
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
    • B23Q11/10—Arrangements for cooling or lubricating tools or work
    • B23Q11/1038—Arrangements for cooling or lubricating tools or work using cutting liquids with special characteristics, e.g. flow rate, quality
    • B23Q11/1046—Arrangements for cooling or lubricating tools or work using cutting liquids with special characteristics, e.g. flow rate, quality using a minimal quantity of lubricant
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
    • B23Q11/0078—Safety devices protecting the operator, e.g. against accident or noise
    • B23Q11/0096—Safety devices protecting the operator, e.g. against accident or noise protecting against noise
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
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Abstract

The invention relates to a noise reduction device, in particular to a noise reduction device for micro-lubrication and an injection system; the noise reduction device for micro-lubrication comprises a noise reduction device body, wherein the noise reduction device body is provided with an opening for installing an oil mist nozzle and a noise reduction gas outlet arranged around the opening, the noise reduction gas outlet is used for providing noise reduction gas for reducing the turbulence influence range of oil mist, and the ejection direction of the noise reduction gas is parallel to, intersected with or crossed with the central ejection direction of the oil mist nozzle. The noise reduction device and the noise reduction gas outlet of the injection system provided by the invention can obviously reduce the distribution range of the turbulence intensity of the whole injection flow field, so that the distribution of the turbulence intensity of the injection flow field is obviously in a contraction trend, the larger turbulence intensity is controlled in a narrow area, the length of a jet flow mixing area is obviously reduced, the diffusion of the turbulence to the periphery is reduced, and the reduction of the total sound pressure level is realized.

Description

Noise reduction device for micro-lubrication and injection system
Technical Field
The invention relates to a noise reduction device, in particular to a noise reduction device for micro-lubrication and an injection system.
Background
The minimal quantity lubrication technique generally refers to a technique of mixing and vaporizing a compressed gas (air, nitrogen, carbon dioxide, etc.) with a very small quantity of lubricating oil or cutting fluid to form an oil mist having a droplet size of millimeter or micron, and spraying the oil mist at a high speed through a nozzle to a cutting region or a kinematic pair to effectively cool and lubricate the cutting region or the kinematic pair. In machining, compared with a traditional cutting fluid injection mode, the micro-lubricating technology obviously reduces the using amount of the cutting fluid, reduces the harm of the cutting fluid to the environment and human bodies, and compared with dry cutting, due to the fact that a cooling lubricating medium is introduced, the cutting machining performance is improved.
The lubricating system adopting the micro-lubricating technology generally comprises a compressor, an oil pump, a control valve, a nozzle and pipeline accessories; cutting fluid and compressed gas are respectively supplied by an oil pump and a compressor, and oil mist is ejected from a tiny space at the outlet of the existing nozzle at a high speed to generate high-decibel noise, so that the attention of people is not concentrated, and the working efficiency is low. If the working environment with noise exceeding 85 decibels exists for a long time, hearing fatigue of workers is difficult to recover, hearing loss is caused, and even noise deafness is caused, so that attention needs to be paid to noise problems caused by the micro-lubrication technology.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art or the related art.
The invention provides a noise reduction device for micro-lubrication, which comprises a noise reduction device body, wherein the noise reduction device body is provided with an opening for installing an oil mist nozzle and a noise reduction gas outlet arranged around the opening, the noise reduction gas outlet is used for providing noise reduction gas for reducing the turbulence influence range of oil mist, and the ejection direction of the noise reduction gas is parallel to, intersected with or crossed with the ejection direction of the center of the oil mist nozzle.
In one embodiment, the number of the noise reduction gas outlets is plural, and the plural noise reduction gas outlets are arranged in an annular array with the opening as a center.
In one embodiment, the ejection direction of the noise reduction gas from the noise reduction gas outlet intersects with the center ejection direction of the oil mist from the oil mist nozzle.
In one embodiment, the noise reduction gas outlet is connected to a noise reduction gas supply device through a gas supply passage, and the noise reduction gas supply device is provided separately from the gas supply device of the oil mist nozzle.
In one embodiment, the gas supply passage includes a gas inlet communicating with the noise reduction gas supply device, an annular flow passage communicating with the gas inlet, and a plurality of flow passage branches communicating with the annular flow passage, and each of the noise reduction gas outlets is provided in each of the flow passage branches.
In one embodiment, the noise reducer body is a split structure including an inner structure and an outer structure; the inner structure body and the outer structure body are both revolving bodies, an inner concave surface is formed on one side of the outer structure body, an outer convex surface is formed on one side of the inner structure body, the inner concave surface and the outer convex surface are matched to form an air supply passage, and the noise reduction gas outlet is a port of the air supply passage facing the oil mist nozzle.
A second aspect of the present invention provides an injection system for minimal lubrication, including an oil mist nozzle around which a noise reduction gas outlet is provided for supplying a noise reduction gas for reducing a turbulent influence range of an oil mist, an ejection direction of the noise reduction gas being parallel to, intersecting with, or intersecting with a central ejection direction of the oil mist from the oil mist nozzle.
In one embodiment, the number of the noise reduction gas outlets is plural, and the plural noise reduction gas outlets are arranged in an annular array centering on the oil mist nozzle.
In one embodiment, the ejection direction of the noise reduction gas from the noise reduction gas outlet intersects with the center ejection direction of the oil mist from the oil mist nozzle.
The invention has the beneficial effects that: the noise reduction device and the noise reduction gas outlet of the injection system provided by the invention can obviously reduce the distribution range of the turbulence intensity of the whole injection flow field, so that the distribution of the turbulence intensity of the injection flow field is obviously in a contraction trend, the larger turbulence intensity is controlled in a narrow area, the length of a jet flow mixing area is obviously reduced, the diffusion of the turbulence to the periphery is reduced, and the reduction of the total sound pressure level is realized.
Drawings
FIG. 1 is a schematic structural view of a noise reducing device for minimal lubrication according to an embodiment of the present invention;
FIG. 2 is a front view of the noise reducer body of FIG. 1;
FIG. 3 is a cross-sectional view A-A of FIG. 2;
FIG. 4 is a schematic structural view of a noise reducing device for minimal lubrication according to yet another embodiment of the present invention;
FIG. 5 is a perspective view of the end cap of FIG. 4;
FIG. 6 is a front view of the end cap of FIG. 5;
FIG. 7 is a cross-sectional view B-B of FIG. 6;
FIG. 8 is a schematic perspective view of the outer structure of FIG. 4;
FIG. 9 is a front view of the outer structure of FIG. 8;
FIG. 10 is a cross-sectional view C-C of FIG. 9;
FIG. 11 is a schematic perspective view of the inner structure of FIG. 4;
FIG. 12 is a front view of the inner structure shown in FIG. 11;
FIG. 13 is a cross-sectional view D-D of FIG. 12;
FIG. 14 is a schematic perspective view of the linker of FIG. 4;
FIG. 15 is a front view of the connector shown in FIG. 14;
FIG. 16 is a cross-sectional view E-E of FIG. 15;
description of reference numerals: 1. an end cap; 11. a tapered through hole; 2. a noise reducer body; 21. a noise reducing gas outlet; 22. an air inlet; 23. a flow channel is branched; 24. an outer structure; 25. an inner structure; 26. an air supply passage; 261. an inner concave surface; 262. an outer convex surface; 27. an annular flow passage; 3. a linker; 4. a nozzle inner core connecting pipe; 5. and a nozzle inner core.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the embodiments of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the embodiments of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "connected" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. Specific meanings of the above terms in the embodiments of the present invention can be understood in specific cases by those of ordinary skill in the art.
In embodiments of the invention, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of an embodiment of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
As shown in fig. 1 to 16, a first aspect of the present invention provides a noise reducer for minimal lubrication, comprising a noise reducer body 2, the noise reducer body 2 being provided with an opening for mounting an oil mist nozzle and a noise reduction gas outlet 21 provided around the opening, the noise reduction gas outlet 21 being provided for supplying a noise reduction gas for reducing a turbulent influence range of the oil mist, the noise reduction gas being parallel to, intersecting with, or intersecting with a center of an oil mist ejection direction of the oil mist nozzle. The specific spraying direction of the noise reduction gas outlet 21 can be designed according to actual needs; the type of noise reducing gas may be various, and may be, for example, air, nitrogen, carbon dioxide, or the like, which is commonly used for atomizing oil mist.
The noise reduction device for micro-lubrication provided by the invention realizes the noise reduction effect based on the principle of oil mist mixing, can realize noise reduction on an oil mist nozzle (or cutting fluid nozzle) for micro-lubrication, and can also be used for other gas nozzles, liquid nozzles or gas-liquid mixed nozzles.
As shown in fig. 2 to 3, in one embodiment, the number of the noise reduction gas outlets 21 is plural, and the plural noise reduction gas outlets 21 are arranged in an annular array with the opening as the center. The noise reducing gas from the plurality of noise reducing gas outlets 21 may form a conical or annular gas curtain around the oil mist nozzles to influence the oil mist from the oil mist nozzles.
As shown in fig. 1 to 3, in one embodiment, the ejection direction of the noise reduction gas from the noise reduction gas outlet 21 intersects with the center ejection direction of the oil mist from the oil mist nozzle. Under the condition that the spraying direction is intersected with the oil mist spraying direction, the noise reduction gas can obviously reduce the turbulence intensity distribution range of the whole spraying flow field of the oil mist sprayed by the oil mist nozzle, so that the total sound pressure level of the noise affecting workers is reduced. For example, the angle α between the noise-reducing gas outlet 21 and the centre axis of the oil mist nozzle may be 60 °.
In one embodiment, the noise reducing gas outlet 21 is connected to a noise reducing gas supply device through a supply passage 26, the noise reducing gas supply device being provided separately from the supply device of the oil mist nozzle. The noise reduction gas outlet 21 is provided with a gas supply device independent of the oil mist nozzle, so that the flow of the noise reduction gas can be adjusted according to the spraying condition of the oil mist. Adjusting the ratio of the flow rate of the oil mist sprayed from the oil mist nozzle (i.e., the flow rate of the main jet flow) to the flow rate of the noise reduction gas has an effect on the noise reduction effect.
The range of the ratio of the flow of the noise reduction gas to the flow of the main jet flow of the oil mist nozzle is the noise reduction flow ratio, and the noise reduction effect is better under the condition of proper noise reduction flow ratio; for main jet flow rate Q0＝20L/min、Q030L/min and Q0At 40L/min, the optimal comprehensive noise reduction effect in multiple directions is obtained under the conditions that the noise reduction flow rate ratio is 0.075, 0.005 and 0.075 respectively.
As shown in fig. 1 to 3, in one embodiment, the gas supply passage 26 includes a gas inlet 22 communicating with the noise reduction gas supply means, one annular flow passage 27 communicating with the gas inlet 22, and a plurality of flow passage branches 23 communicating with the annular flow passage 27, and each noise reduction gas outlet 21 is provided to each flow passage branch 23.
As shown in fig. 4 to 13, in one embodiment, the noise reducer body 2 is a split structure; the noise reducer body 2 includes an inner structural body 25 and an outer structural body 24; the inner structural body 25 and the outer structural body 24 are both rotary bodies, one side of the outer structural body 24 is formed with an inner concave surface 261, one side of the inner structural body 25 is formed with an outer convex surface 262, the inner concave surface 261 and the outer convex surface 262 cooperate to form the air supply passage 26, and the noise reduction gas outlet 21 is a port of the air supply passage 26 facing the oil mist nozzle; the other side of the gas supply passage 26 is connected to a gas supply device, which may be the noise reduction gas supply device described above. The noise reducer body 2 of the split structure in which the air supply passage 26 is easy to machine can save manufacturing cost and maintenance cost. Fig. 8-10 show outer structure 24 and fig. 11-13 show inner structure 25; the inner structure 25 and the outer structure 24 are connected by means of mateable thread segments provided separately on both.
In one embodiment, the noise reducer body 2 is provided with a screw fastening portion for fixing with the oil mist nozzle. Because the shape of the oil mist nozzle is various, the form of the thread fastening part is not limited, and the thread fastening part can be a plurality of thread holes arranged around the noise reduction device body 2 and can also be arranged on the thread section of the central hole of the noise reduction device body 2. The connection mode of the noise reduction device body 2 and the oil mist nozzle is not limited to threaded connection, and modes such as welding and gluing can be adopted, but the mode of threaded connection is adopted to facilitate the detachable fixation of the noise reduction device body 2 and the oil mist nozzle.
As shown in fig. 1 to 16, a second aspect of the present invention provides an injection system for minimal lubrication, including an oil mist nozzle around which a noise reduction gas outlet 21 is provided, the noise reduction gas outlet 21 being for supplying a noise reduction gas for reducing a turbulent influence range of oil mist, the noise reduction gas being parallel to, intersecting with, or intersecting with a center of an oil mist ejection direction of the oil mist nozzle. The specific spraying direction of the noise reduction gas outlet 21 can be designed according to actual needs; the type of noise reducing gas may be various, and may be, for example, air, nitrogen, carbon dioxide, or the like, which is commonly used for atomizing oil mist.
In one embodiment, the number of the noise reduction gas outlets 21 is plural, and the plural noise reduction gas outlets 21 are arranged in an annular array centering on the oil mist nozzle. The plurality of noise reducing gas outlets 21 may form a conical or annular gas curtain around the oil mist nozzle to influence the oil mist nozzle; the combined use of the noise reduction gas outlets 21 with the smaller diameters enables the noise generated by the combination of the noise reduction gas outlets 21 to be smaller under the condition that the flow rate of the noise reduction gas is fixed, and the reduction of the total sound pressure level of the injection system is facilitated.
In one embodiment, the ejection direction of the noise reduction gas from the noise reduction gas outlet 21 intersects the center ejection direction of the oil mist from the oil mist nozzle. Under the condition that the spraying direction is intersected with the oil mist spraying direction, the noise reduction gas can obviously reduce the turbulence intensity distribution range of the whole spraying flow field of the oil mist sprayed by the oil mist nozzle, so that the total sound pressure level of the noise affecting workers is reduced. As shown in fig. 1, the angle α between the noise-reducing gas outlet 21 and the centre axis of the oil mist nozzle may be 60 °.
In one embodiment, the noise reducing gas outlet 21 is connected to a noise reducing gas supply device through a supply passage 26, the noise reducing gas supply device being provided separately from the supply device of the oil mist nozzle.
In one embodiment, the noise reducing gas outlet 21 is connected to the noise reducing gas supply device through a gas supply passage 26, the gas supply passage 26 includes a gas inlet 22 communicating with the noise reducing gas supply device, an annular flow passage 27 communicating with the gas inlet 22, and a plurality of flow passage branches 23 communicating with the annular flow passage 27, and the noise reducing gas outlet 21 is provided to the flow passage branches 23.
In one embodiment, the injection system comprises a conical ring surface on the injection direction side of the oil mist nozzle, on which conical ring surface the noise reduction gas outlet 21 is arranged. The conical annulus may act to limit the turbulence distribution of the oil mist, thereby further reducing the overall sound pressure level of the injection system for minimal lubrication.
In one embodiment, the present invention provides an injection system for minimal lubrication comprising a noise reducing device, with a noise reducing gas outlet 21 provided to the noise reducing device.
As shown in fig. 5 to 7, in one embodiment, the injection system includes an end cap 1, the end cap 1 is disposed away from a noise reduction gas outlet 21 (shown in fig. 4) in an injection direction of the oil mist nozzle, and a tapered through hole 11 for ejecting the oil mist is provided in a center of the end cap 1. The conical through hole 11 is the final outlet through which the oil mist of the injection system for minimal lubrication passes, and the conical through hole 11 can further limit the turbulent influence range of the oil mist, so that the total sound pressure level of the injection system for minimal lubrication is reduced.
In one embodiment, the oil mist nozzle comprises a nozzle core connection tube 4 and a nozzle core 5; because the noise reduction gas outlet 21 for providing noise reduction gas is arranged, after lubricating oil (or cutting fluid) and noise reduction gas (such as compressed air and the like) respectively enter the nozzle inner core 5 from the nozzle inner core connecting pipe 4, the lubricating oil (or cutting fluid) and the noise reduction gas are mixed and atomized at the outlet under the action of the nozzle inner core 5; at this time, the noise reduction gas introduced from the inlet port 22 of the noise reducer passes through the gas supply passage in the noise reducer, reaches the plurality of noise reduction gas outlets 21 at the tip end, and is ejected, thereby reducing the turbulent influence range of the oil mist.
As shown in fig. 1 and 4, the injection system for minimal quantity lubrication comprises an end cover 1, a noise reduction device, a connecting body 3 and a nozzle inner core connecting pipe 4 which are connected in sequence, wherein a nozzle inner core 5 is enclosed in a through hole formed by connecting the noise reduction device, the connecting body 3 and the nozzle connecting pipe; the nozzle core connecting pipe 4 is used for installing an air supply pipeline and/or an oil supply pipeline (which can also be used for supplying cutting fluid) of the nozzle core 5, and plays a role in supporting and fixing.
Fig. 14 to 16 show the structure of the connecting body 3. The connecting body 3 is used for fixing the noise reduction device body 2 and the nozzle inner core connecting pipe 4 to each other. The connector 3 is a revolving body structure, and the two ends of the connector 3 are respectively provided with a thread section for connecting the noise reduction device body 2 and the nozzle inner core connecting pipe 4.
The jet flow generated by the noise reduction gas outlet 21 can obviously reduce the distribution range of the turbulence intensity of the whole jet flow field, so that the distribution of the turbulence intensity of the jet flow field is obviously in a contraction trend, the larger turbulence intensity is controlled in a narrow area, the length of a jet flow mixing area is obviously reduced, the diffusion of the turbulence to the periphery is reduced, the width of a shear layer can be reduced in the range of 10 times the diameter of the nozzle, and the turbulence intensity in the shear layer is high and the distribution range is narrow.
On the aspect of sound field frequency characteristics, the noise reduction device for minimal quantity lubrication and the injection system for minimal quantity lubrication provided by the embodiment of the invention can keep low-frequency noise at a certain level, obviously reduce medium-frequency noise and realize reduction of total sound pressure level on the comprehensive effect.
Table 1 shows the noise reduction effect of the noise reduction device for minimal lubrication according to the embodiment of the present invention when different noise reduction flow rates are provided to the oil mist nozzle, where the noise reduction flow rate ratio in the table refers to the ratio of the flow rate of the noise reduction gas to the main jet flow rate of the oil mist nozzle, and the azimuth angle refers to the azimuth angle of the measurement position relative to the oil mist nozzle. Because the oil mist of the nozzle core is ejected forwards at a high speed, the total noise sound pressure level right in front of the nozzle core (namely at the azimuth angle of 90 degrees) is the highest. In table 1, the total sound pressure level generally shows a decreasing trend as the azimuth angle decreases (i.e., as the measurement azimuth moves to the side of the nozzle core), and different noise reduction flow ratios (the ratio of the main jet flow to the amount of compressed air flowing through the annular passage) have some effect on the noise reduction effect. Compared with the original oil mist nozzle, the noise reduction device for micro-lubrication in the embodiment of the invention can achieve the noise reduction effect of 0.70-4.88 dB in the sound pressure test based on different azimuth angles, and the noise reduction percentage can reach 0.94% -6.40%. Considering that the unit dB of the total sound pressure level (OASPL) is logarithmic based, the noise reduction effect achievable by the noise reduction device for minimal lubrication of the embodiment of the present invention is significant.
Figure GDA0002596297750000101
TABLE 1 maximum noise reduction effect at different noise reduction flow ratios
Although the invention has been described in detail hereinabove with respect to a general description and specific embodiments thereof, it will be apparent to those skilled in the art that modifications and improvements can be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.

Claims (8)

1. A noise reduction device for micro-lubrication is characterized by comprising a noise reduction device body, the noise reduction device body is provided with an opening for installing an oil mist nozzle and a noise reduction gas outlet arranged around the opening, the noise reduction gas outlet is used for providing noise reduction gas for reducing the turbulence influence range of the oil mist, the ejection direction of the noise reduction gas is parallel to, intersected with or crossed with the central ejection direction of the oil mist nozzle, the noise reduction device body is of a split structure, which comprises an inner structure body and an outer structure body, wherein the inner structure body and the outer structure body are both revolution bodies, an inner concave surface is formed on one side of the outer structural body, an outer convex surface is formed on one side of the inner structural body, the inner concave surface and the outer convex surface are matched to form an air supply passage, and the noise reduction gas outlet is a port of the air supply passage facing the oil mist nozzle.
2. The noise reducer for minimal lubrication according to claim 1, wherein the number of the noise reduction gas outlets is plural, and the plural noise reduction gas outlets are arranged in an annular array centering on the opening.
3. The noise reduction device for minimal lubrication according to claim 1 or 2, wherein an ejection direction of the noise reduction gas from the noise reduction gas outlet intersects with a center ejection direction of the oil mist from the oil mist nozzle.
4. The noise reducer for minimal lubrication according to claim 1, wherein the noise reduction gas outlet is connected to a noise reduction gas supply means through a gas supply passage, the noise reduction gas supply means being provided separately from the gas supply means of the oil mist nozzles.
5. The noise reducer for minimal lubrication according to claim 4, wherein the gas supply passage includes a gas inlet communicating with the noise reduction gas supply means, an annular flow passage communicating with the gas inlet, and a plurality of flow passage branches communicating with the annular flow passage, each of the noise reduction gas outlets being provided in each of the flow passage branches.
6. An injection system for minimal lubrication, comprising an oil mist nozzle around which a noise reducing gas outlet is provided, the noise reduction gas outlet is used for providing noise reduction gas for reducing the turbulence influence range of the oil mist, the ejection direction of the noise reduction gas is parallel to, intersected with or crossed with the central ejection direction of the oil mist nozzle, wherein the oil mist nozzle is arranged at the opening of the noise reduction device body, the noise reduction device body is of a split structure, which comprises an inner structure body and an outer structure body, wherein the inner structure body and the outer structure body are both revolution bodies, an inner concave surface is formed on one side of the outer structural body, an outer convex surface is formed on one side of the inner structural body, the inner concave surface and the outer convex surface are matched to form an air supply passage, and the noise reduction gas outlet is a port of the air supply passage facing the oil mist nozzle.
7. The injection system for minimal lubrication according to claim 6, wherein the number of the noise reduction gas outlets is plural, and the plural noise reduction gas outlets are arranged in an annular array centered on the oil mist nozzle.
8. The injection system for minimal lubrication according to claim 6 or 7, wherein an ejection direction of the noise reduction gas from the noise reduction gas outlet intersects a center ejection direction of the oil mist from the oil mist nozzle.
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