CN202155801U - Three-phase fluid feeding nozzle for minimal quantity lubrication type grinding - Google Patents

Three-phase fluid feeding nozzle for minimal quantity lubrication type grinding Download PDF

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Publication number
CN202155801U
CN202155801U CN2011202678745U CN201120267874U CN202155801U CN 202155801 U CN202155801 U CN 202155801U CN 2011202678745 U CN2011202678745 U CN 2011202678745U CN 201120267874 U CN201120267874 U CN 201120267874U CN 202155801 U CN202155801 U CN 202155801U
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China
Prior art keywords
nozzle
fluid
passage
air cell
nano
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Expired - Fee Related
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CN2011202678745U
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Chinese (zh)
Inventor
韩振鲁
李长河
李晶尧
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Qingdao University of Technology
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Qingdao University of Technology
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Priority to CN2011202678745U priority Critical patent/CN202155801U/en
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Abstract

The utility model relates to the field of mechanical processing, and to a three-phase fluid feeding nozzle for minimal quantity lubrication type grinding, which is characterized in that: nano-fluid is delivered to the nozzle through a fluid way; meanwhile, high-pressure air enters the nozzle through an air path; the high-pressure air and the nano-fluid are sufficiently mixed and atomized in a mixing chamber of the nozzle, accelerated by an accelerating chamber, and then enter a vortex chamber; meanwhile, compressed air enters the vortex chamber through the air vent of the vortex chamber; three-phase fluid is further mixed by rotation and accelerated; and then the three-phase fluid is sprayed to a grinding area in a form of atomized fluid drops through the outlet of the nozzle. The three-phase fluid feeding nozzle for minimal quantity lubrication type grinding has the advantages that: the turning air vent of the mixing chamber of the nozzle is tangent to the wall surface of the mixing chamber; the nano-fluid and the air are mixed uniformly; both the air path and the fluid path are equipped with a pressure regulating valve, a throttle valve and a flow meter, so that the pressure and the flow of the nano-fluid and the high-pressure air can be regulated according to the need, thus achieving optimal minimal quantity lubrication effect; and the three-phase fluid feeding nozzle for minimal quantity lubrication type grinding solves the problems in insufficient cooling ability of minimal quantity lubrication, large use amount of lubricants of pouring type grinding, high treatment cost of waste fluids and serious environmental pollution.

Description

Micro lubricating grinding three-phase stream supply nozzle
Technical field
The utility model relates to a kind of field of machining, i.e. micro lubricating grinding three-phase stream supply nozzle.
Background technology
At present, grinding makes with lubricator in a large number, is also referred to as the cast-type grinding, and is very big to environment and workers ' health injury.Because environmental requirement, the waste liquid of lubricant must pass through processing, could discharge after up to standard, and liquid waste processing is costly, up to 54% of lubricant cost, makes people have to lubricant is reappraised.Germany did investigation to automobile factory, and the result who obtains is: tool expense only accounts for the 2%-4% of processing cost; But the expense relevant with lubricant but accounts for the 7%-17% of cost, be tool expense 3-5 doubly.Energy consumption in the machining, the power that spindle operation needs only accounts for 20%, and the energy consumption relevant with cooling and lubricating but accounts for 53%.This explanation is owing to the requirement of " environmental protection and low-carbon (LC) ", and the cheap advantage of lubricant does not exist, has become the obstacle that influences production development.
For protection environment, the dry type grinding of stopping using lubricant consciously fully that reduces cost are arisen at the historic moment.The dry type grinding is owing to abandoned the use of lubricant, and the advantage of its environmental protection aspect is self-evident.But because the energy that grinding removal unit materials volume is consumed is much bigger more than processing methods such as milling, turning, drillings; Produce so high energy density in emery wheel/workpiece interface, only have less than 10% heat and taken away by abrasive dust, these heats that import workpiece into can accumulate in superficial layer and form localized hyperthermia; Therefore in grinding, do not make with lubricator fully; Workpiece surface quality is worsened, and emery wheel reduces service life significantly, even scrap inefficacy.
The micro lubricating technology is under the prerequisite of guaranteeing greasy property and cooling effect, uses minimal lubricant.The micro lubricating grinding is the lubricant of in gases at high pressure, sneaking into trace, by getting into the high temperature grinding area behind the high pressure draught mixed aerosol.High pressure draught plays the effect of cooling, chip removal, and lubricating oil is attached on the finished surface of workpiece, forms layer protecting film, plays the effect of micro lubricating., research shows: the cooling effect of high pressure draught is very limited, has satisfied not the needs of high grinding area temperature enhanced heat exchange, and the crudy of workpiece and wheel life obviously reduce than traditional cast-type grinding, explains that the micro lubricating technology also needs further to improve.
Can know that by the enhanced heat exchange theory heat-transfer capability of solid is much larger than liquids and gases.The thermal conductivity factor of solid material is than the big several magnitude of fluent materials such as liquid, gas even higher under the normal temperature.,, both be difficult to participate in grinding process, be difficult to take away heat again, so also do not obtain paying attention to because solid matter is mobile poor.
Summary of the invention
The purpose of the utility model is: existing solid material is participated in the enhanced heat exchange of lubricant, makes the solid material in the lubricant that good flowing property and stability are arranged again.Under equal volume content, the surface area of nano particle and thermal capacity is much larger than millimeter or micron-sized solids, processes nano-fluid after therefore nano particle and lubricant fully being mixed, and the capacity of heat transmission of nano-fluid will increase considerably.Add the small-size effect of nano material, its behavior approaches fluid molecule, and the strong Brownian movement of nano particle helps its maintenance stable suspersion and do not precipitate, and has excellent flowability ability, stability and composition homogeneous performance.In addition, nano particle excellent lubrication characteristic helps to improve the tribological property of abrasive grinding wheel/workpiece interface again, reduces grinding force and grinding specific energy, and the grinding area temperature is further reduced.The utility model adds nano particle processes nano-fluid in the lubricant, nano-fluid is injected to the micro lubricating grinding three-phase stream supply nozzle of grinding area with the form of jet under the gases at high pressure rolling action then.
Above-mentioned purpose is realized by following technical scheme: design micro lubricating grinding three-phase stream supply nozzle is ejected into grinding area with three-phase stream (nano particle, lubricant, gases at high pressure) behind the nozzle interior mixed aerosol.It is characterized in that: nano particle and mix lubricant are processed nano-fluid; Nano-fluid is delivered to the nozzle place through the liquid road then; Gases at high pressure get into nozzle through gas circuit simultaneously, carry out mixed aerosol with nano-fluid in nozzle interior, and finally the form with three-phase stream atomized drop is injected into grinding area.
Said nozzle comprises nanometer fluid passage, gases at high pressure passage, mixing chamber, accelerating chamber, minor air cell, end cap, nozzle body, spool, inner cone, rotation direction passage, minor air cell's passage, seal washer and jet expansion.
Said spool is the cylinder hollow structure; Its cylindrical cavity is a mixing chamber; The upper end and the end cap of spool link, and lower end and inner cone link, and on the axial length of spool, are furnished with 3 row's rotation direction passages; Each row's rotation direction passage is arranged 6 along the spool even tube wall, and inlet axis and mixing chamber wall are tangent.
Said inner cone is the taper hollow structure, and its conical cavity is an accelerating chamber, and male cone (strobilus masculinus) cooperates connection with nozzle body, and the material of inner cone is bronze or pottery.
Said jet expansion is the taper hollow structure; Hollow cavity is the minor air cell; On minimum diameter place, the minor air cell right side wall minor air cell's passage is arranged, its axis and 10 °≤α of minor air cell's axis angle≤35 °, the upper end of jet expansion and nozzle body and inner cone link.
The inwall of said minor air cell is to combine with the axial different cylinder and the conical surfaces of angle by several sections, and its parameter is respectively 10 °≤β≤20 °, 3 °≤γ≤45 °, and 5 °≤θ≤10 °.
Said nozzle body upper end links with end cap, and the inner chamber middle part is equipped with spool and seal washer, and the inner chamber bottom is equipped with inner cone, on the wall of upper end, right side, is provided with passage.
Said gases at high pressure passage is to be made up of nozzle body inner surface, valve core outer surface, seal washer upper surface and end cap lower surface.
Said end cap upper end links with the liquid road.
Said passage and minor air cell's passage link with gas circuit respectively.
Said liquid road comprises nano-fluid liquid reserve tank, hydraulic pump, fluid pressure regulator valve, fluid choke valve, flow measuring apparatus, overflow valve and fluid recovery case.
Said gas circuit comprises air compressor, filter, air accumulator, Pressure gauge, gas pressure regulating valve, gas throttling valve and gas flowmeter.
The beneficial effect of the utility model is: nano-fluid is delivered to the nozzle place through the liquid road; Gases at high pressure get into nozzle through gas circuit simultaneously; Gases at high pressure and nano-fluid be abundant mixed aerosol in the nozzle mixing chamber, after accelerating chamber quickens, gets into the minor air cell, and passage gets into Compressed Gas through the minor air cell simultaneously; Three-phase stream is further rotated mixes and acceleration, three-phase stream is injected into grinding area with the form of atomized drop through jet expansion then.Compared with prior art, the rotation direction passage and the mixing chamber wall of the utility model nozzle mixing chamber are tangent, and gases at high pressure carry the nano-fluid rotation and form eddy current, and nano-fluid and gas mix; The inwall of minor air cell is formed with axial different cylinder and the cone structures of angle by several sections; Compressed Gas is passage minimum cylindrical section entering of diameter from the minor air cell through the minor air cell; Make the three-phase stream in the minor air cell be further rotated acceleration and fully atomizing, the atomized drop diameter is little, and dispersion range is wide; Gas circuit and liquid road are evenly equipped with pressure regulator valve, choke valve and flowmeter, and the pressure of nano-fluid and gases at high pressure, flow can be regulated as required, reach optimum micro lubricating effect; It is not enough to have solved the micro lubricating cooling capacity, and cast-type grinding lubricant quantity is big, takes liquid processing cost height, the difficult problem that environmental pollution is serious.
Description of drawings
Fig. 1 is the nozzle arrangements figure of a kind of embodiment;
Fig. 2 is the liquid-supplying system schematic diagram of this embodiment;
Fig. 3 is the rotation direction passage layout drawing of this embodiment nozzle;
Fig. 4 is minor air cell's structure chart of this embodiment nozzle.
Visible among the figure: air compressor 1, air accumulator 2, nano-fluid liquid reserve tank 3, hydraulic pump 4, fluid choke valve 5, flow measuring apparatus 6; Gas throttling valve 7, gas flowmeter 8, fluid pressure regulator valve 9, gas pressure regulating valve 10, Pressure gauge 11, filter 12; Overflow valve 13, nanometer fluid passage 14, passage 15, gases at high pressure passage 16, rotation direction passage 17, seal washer 18; Minor air cell's passage 19, minor air cell 20, jet expansion 21, inner cone 22, accelerating chamber 23; Spool 24, mixing chamber 25, end cap 26, nozzle body 27, fluid recovery case 28.
The specific embodiment
The total design of the utility model is that nano-fluid (nano particle and lubricant) is delivered to the nanometer fluid passage in the nozzle through the liquid road; Gases at high pressure get into the passage in the nozzle through gas circuit simultaneously; Gases at high pressure in the gases at high pressure passage get into mixing chamber through the rotation direction passage; With from the abundant mixed aerosol in the nozzle mixing chamber of the nano-fluid in the nanometer fluid passage, quicken the back through accelerating chamber and get into the minor air cell, gases at high pressure passage entering simultaneously through the minor air cell; Three-phase stream is further rotated mixes and acceleration, three-phase stream is injected into grinding area with the form of atomized drop through jet expansion then.Because the nano particle thermal conductivity factor is high, when nano-fluid passes through high-temperature area, can take away a large amount of grinding heats, thereby strengthen the cooling performance of lubricant, remedied the deficiency of micro lubricating cooling capacity.Simultaneously because the small-size effect of nano material; Excellent flowability can, stability and composition homogeneous performance, kept the character and the advantage of micro lubricating, and excellent lubrication characteristic and with the form ejection of atomized drop; Increased the lubricated area of lubricant; Effectively reduce the friction between emery wheel and workpiece, emery wheel and the smear metal, prolonged the life-span of emery wheel, obtained crudy height, low, the free of contamination good effect of cost.Introduce a kind of embodiment below in conjunction with accompanying drawing.
Fig. 1 is the nozzle arrangements figure of a kind of embodiment, and visible in conjunction with Fig. 1, nozzle is by nanometer fluid passage 14, passage 15; Gases at high pressure passage 16, rotation direction passage 17, seal washer 18, minor air cell's passage 19; Minor air cell 20, jet expansion 21, inner cone 22, accelerating chamber 23; Spool 24, mixing chamber 25, end cap 26, nozzle body 27 constitutes; Spool 24 is the cylinder hollow structure; Its cylindrical cavity is a mixing chamber 25, and the upper end of spool 24 and end cap 26 link, and lower end and inner cone 22 link; On the axial length of spool 24, be furnished with 3 row's rotation direction passages 17; Visible in conjunction with Fig. 3, each row's rotation direction passage 17 is arranged 6 along spool 24 even tube wall, and inlet axis and mixing chamber wall are tangent; Inner cone 22 is the taper hollow structure, and its conical cavity is an accelerating chamber 23, and male cone (strobilus masculinus) cooperates connection with nozzle body 27, and the material of inner cone 22 is bronze or pottery.
In conjunction with Fig. 1; Fig. 4 is visible; Jet expansion 21 is the taper hollow structure, and hollow cavity is minor air cell 20, on minor air cell's 20 minimum diameter place right side walls minor air cell's passage 19 is arranged; Its axis and 10 °≤α of minor air cell's axis angle≤35 °, the upper end of jet expansion 21 and nozzle body 27 link with inner cone 22.The inwall of minor air cell 20 is to combine with the axial different cylinder and the conical surfaces of angle by several sections, and its parameter is respectively 10 °≤β≤20 °, 3 °≤γ≤45 °, and 5 °≤θ≤10 °.
Visible in conjunction with Fig. 1, nozzle body 27 upper ends and end cap 26 link, and the inner chamber middle part is equipped with spool 24 and seal washer 18, and the inner chamber bottom is equipped with inner cone 22, on the wall of upper end, right side, are provided with passage 15.Gases at high pressure passage 16 is to be made up of nozzle body 27 inner surfaces, spool 24 outer surfaces, seal washer 18 upper surfaces and end cap 26 lower surfaces.
In conjunction with Fig. 1, Fig. 2 is visible, and end cap 26 upper ends and liquid road link, and passage 15 links with gas circuit respectively with minor air cell's passage 19.
Shown in Figure 2 is the schematic diagram of micro lubricating grinding three-phase stream feed system, is made up of liquid road, gas circuit and nozzle, during work; Primer fluid press pump 4; The nano-fluid that is stored in the nano-fluid liquid reserve tank 3 enters into the nanometer fluid passage 14 of nozzle through fluid pressure regulator valve 9, fluid choke valve 5 and flow measuring apparatus 6, and overflow valve 13 plays the effect of safety valve, when the pressure in the liquid road surpasses set pressure; Overflow valve 13 is opened, and nano-fluid is flow back in the fluid recovery case 28 through overflow valve 13; In the time of primer fluid press pump 4, start air compressor 1, gases at high pressure enter into the passage 15 of nozzle, the force value in the Pressure gauge 11 monitoring gas circuits through filter 12, air accumulator 2, gas pressure regulating valve 10, gas throttling valve 7 and gas flowmeter 8; Gases at high pressure in the gases at high pressure passage 16 get into mixing chamber 25 through rotation direction passage 17; With from the abundant mixed aerosol in nozzle mixing chamber 25 of the nano-fluid in the nanometer fluid passage 14;, accelerating chamber 23 gets into minor air cell 20 after quickening; Passage 19 gets into gases at high pressure through the minor air cell simultaneously, three-phase stream is further rotated mixes and acceleration, and three-phase stream is injected into grinding area with the form of atomized drop through jet expansion 21 then.Through regulating pressure regulator valve, choke valve and the flowmeter in gas circuit and the liquid road, the pressure of nano-fluid and gases at high pressure, flow can reach optimum micro lubricating effect as required.
The preparation method of nano-fluid is after in the mixed liquor of nano particle and lubricant, adding alkyl sulfonate surfactants, dimethyl sulfate dispersant, adopts ten thousand times/minute dithers of 1.6-2 to obtain steady suspension again.
Nano particle is a graphite granule, and the volume content of nano particle is 1%-30vol% in the nano-fluid, and lubricant is LB1000 degradable synthetic lubricant fluid or vegetable oil, and the consumption of nano-fluid is the grinding wheel width 5-180ml/h of unit.

Claims (6)

1. a micro lubricating grinding three-phase stream supply nozzle comprises nanometer fluid passage (14), passage (15), gases at high pressure passage (16); Rotation direction passage (17), seal washer (18), minor air cell's passage (19), minor air cell (20); Jet expansion (21), inner cone (22), accelerating chamber (23), spool (24); Mixing chamber (25), end cap (26), nozzle body (27) is formed; It is characterized in that: said spool (24) is the cylinder hollow structure; Its cylindrical cavity is mixing chamber (25); The upper end of spool (24) and end cap (26) link, and lower end and inner cone (22) link, and on the axial length of spool (24), are furnished with 3 row's rotation direction passages (17); Each row's rotation direction passage (17) is arranged 6 along spool (24) even tube wall, and inlet axis and mixing chamber wall are tangent.
2. micro lubricating grinding three-phase stream supply nozzle according to claim 1; It is characterized in that: said inner cone (22) is the taper hollow structure; Its conical cavity is accelerating chamber (23), and male cone (strobilus masculinus) cooperates connection with nozzle body (27), and the material of inner cone is bronze or pottery.
3. micro lubricating grinding three-phase stream supply nozzle according to claim 1; It is characterized in that: said jet expansion (21) is the taper hollow structure; Hollow cavity is minor air cell (20); One minor air cell's passage (19) is arranged on minor air cell (20) the minimum diameter place right side wall, its axis and 10 °≤α of minor air cell's axis angle≤35 °, the upper end of jet expansion (21) and nozzle body (27) and inner cone (22) link.
4. micro lubricating grinding three-phase stream supply nozzle according to claim 3; It is characterized in that: the inwall of said minor air cell (20) is to combine with the axial different cylinder and the conical surfaces of angle by several sections; Its parameter is respectively 10 °≤β≤20 °; 3 °≤γ≤45 °, 5 °≤θ≤10 °.
5. micro lubricating grinding three-phase stream supply nozzle according to claim 1; It is characterized in that: said nozzle body (27) upper end links with end cap (26); The inner chamber middle part is equipped with spool (24) and seal washer (18); The inner chamber bottom is equipped with inner cone (22), on the wall of upper end, right side, is provided with passage (15).
6. micro lubricating grinding three-phase stream supply nozzle according to claim 1, it is characterized in that: said gases at high pressure passage (16) is to be made up of nozzle body (27) inner surface, spool (24) outer surface, seal washer (18) upper surface and end cap (26) lower surface.
CN2011202678745U 2011-07-17 2011-07-17 Three-phase fluid feeding nozzle for minimal quantity lubrication type grinding Expired - Fee Related CN202155801U (en)

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Application Number Priority Date Filing Date Title
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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102729101A (en) * 2012-06-22 2012-10-17 青岛理工大学 Solid particle grinding fluid combined machining process and device
CN103231310A (en) * 2013-05-15 2013-08-07 青岛理工大学 Supply system for sub-cooling and nano particle jet flow minimal quantity lubrication coupled grinding medium
CN103567874A (en) * 2013-11-17 2014-02-12 张齐栋 Method for using bow-shaped nozzle for flat grinder grinding wheel
CN103722447A (en) * 2014-01-10 2014-04-16 上海金兆节能科技有限公司 Oil water gas three-phase energy-saving minimal quantity lubrication system
CN103894648A (en) * 2014-03-19 2014-07-02 中北大学 Multifunctional high-speed deep hole rig with negative pressure chip suction device

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102729101A (en) * 2012-06-22 2012-10-17 青岛理工大学 Solid particle grinding fluid combined machining process and device
CN102729101B (en) * 2012-06-22 2015-03-18 青岛理工大学 Solid particle grinding fluid combined machining process and device
CN103231310A (en) * 2013-05-15 2013-08-07 青岛理工大学 Supply system for sub-cooling and nano particle jet flow minimal quantity lubrication coupled grinding medium
CN103231310B (en) * 2013-05-15 2015-03-25 青岛理工大学 Supply system for sub-cooling and nano particle jet flow minimal quantity lubrication coupled grinding medium
CN103567874A (en) * 2013-11-17 2014-02-12 张齐栋 Method for using bow-shaped nozzle for flat grinder grinding wheel
CN103722447A (en) * 2014-01-10 2014-04-16 上海金兆节能科技有限公司 Oil water gas three-phase energy-saving minimal quantity lubrication system
CN103722447B (en) * 2014-01-10 2016-02-03 上海金兆节能科技有限公司 Oil-water-gas three-phase energy saving micro lubricating system
CN103894648A (en) * 2014-03-19 2014-07-02 中北大学 Multifunctional high-speed deep hole rig with negative pressure chip suction device
CN103894648B (en) * 2014-03-19 2016-02-17 中北大学 A kind of multifunctional high speed deep hole rig being provided with withdraw-filings device

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Granted publication date: 20120307

Termination date: 20120717