CN109464954A - The strong mixing flow field dispersal device of Magnetorheologicai polishing liquid and method - Google Patents
The strong mixing flow field dispersal device of Magnetorheologicai polishing liquid and method Download PDFInfo
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- CN109464954A CN109464954A CN201811405792.5A CN201811405792A CN109464954A CN 109464954 A CN109464954 A CN 109464954A CN 201811405792 A CN201811405792 A CN 201811405792A CN 109464954 A CN109464954 A CN 109464954A
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- polishing liquid
- inner cylinder
- magnetorheologicai polishing
- taper inner
- flow field
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F33/00—Other mixers; Mixing plants; Combinations of mixers
- B01F33/80—Mixing plants; Combinations of mixers
- B01F33/82—Combinations of dissimilar mixers
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
- Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
Abstract
The invention discloses a kind of rotary ultrasonic vibration dispersion system and a kind of device and method for carrying out the strong mixing flow field dispersion of Magnetorheologicai polishing liquid using rotary ultrasonic vibration dispersion system, the rotary motion of taper inner cylinder and the rotary motion of rotary ultrasonic vibration dispersion system will form the mixing flow field of dispersion Magnetorheologicai polishing liquid particle, ensure that the flow field circulation of Magnetorheologicai polishing liquid in the device；At the same time, rotary ultrasonic vibration dispersion system generate ultrasound cavitation effect can the mixing flow field to Magnetorheologicai polishing liquid effectively strengthened；Ultrasonic cavitation generate cavitation bubble and cavitation bubble crumble and fall generation a series of high temperature, high pressure, shock wave and microjet it is equivalent should be able to by the magnetic-particle of reunion, non magnetic abrasive grain and other small particle suspension particles be uniformly mixed dispersion; or the particle settled is dispersed again, to improve the reliability during Magnetorheologicai polishing liquid makes and uses.
Description
Technical field
The present invention relates to Precision and Ultra-precision Machining technical field more particularly to a kind of rotary ultrasonic vibration dispersion system and
A kind of device and method carrying out the strong mixing flow field dispersion of Magnetorheologicai polishing liquid using rotary ultrasonic vibration dispersion system.
Background technique
Magnetorheologicai polishing liquid be mixed to form by magnetic-particle, non magnetic abrasive material, base load liquid and multiple additives it is outstanding
Supernatant liquid.Magnetorheologicai polishing liquid approximation Newtonian fluid when not adding magnetic field, and high viscosity, low-flow are presented when applying magnetic field
Bingham fluid feature, be particularly suitable for that industrial key components and parts are accurate, the removal of micro, controllable and certainty.Currently, magnetic current
Become the type face precision for polishing and obtaining up to tens nanometer hereinafter, its surface quality approximation is widely used in without subsurface defect
The fields such as mechanical engineering, aerospace, interplanetary probe, military surveillance, fiber optic communication, nuclear energy fusion precision and ultraprecise component
Skin processing, especially in specular optical element, precise fine groove part have special application.However, magnetorheological throwing
Making and using for light liquid always exists particle aggregation, agglomeration and sedimentation phenomenon in the process, particularly with highly viscous magnetorheological
Polishing fluid, the reunion and sedimentation of particle can seriously affect the stability of the quality of finish of part, polishing efficiency and processing technology.
Therefore, with regard to especially needing to carry out numerous particles to be uniformly mixed dispersion when prepared by Magnetorheologicai polishing liquid.
The mixing dispersion of material particles is mainly by mixing machine, as trough type mixing machine, V-Mixer, taper are mixed
Conjunction machine and double cone mixer etc..Double cone mixer as efficiently, the mixing machinery of relative maturity, can be used for stemness or
The mixing of moist granular material, and can guarantee that granule materials are not crushed, do not grind, do not overheat, the defects of isolating is considered to be worth doing without point,
But the hybrid mode is mainly suitable for material ratio and different, greater particle size solid particle is resuspended, and for such as magnetic current containing particle-liquid
The mixing dispersion effect for becoming polishing fluid is limited.Mixing dispersion containing particle-liquid generally mostly uses mechanical blade agitating mode, such as
Stirring container bottom install propeller blade, thus to material particles carry out high speed rotation mixing, but this method for
Tough liquid medium is easy to produce shear thinning phenomenon.In recent years, ultrasonic agitation technology is widely used in various liquid
The mixing of medium, the ultrasound as disclosed in He'nan Electric Power Corporation, Electric Power Research Institute (application number 201610730557.X)
Wave mixing is stirred under vacuum tank, and using mechanical stirring blade is arranged among tank body, the mode of wall surface setting ultrasonic vibration stick carries out day
The mixing dispersion of right rouge insulating oil.But the generally existing effect swept area of ultrasonic vibration stick is small, energy radiation is uneven,
The few problem of grain amount of agitation.Therefore the large-scale production for industrial Magnetorheologicai polishing liquid relies on merely mixing machine
The mixing for being still not enough to complete a variety of particles such as magnetic-particle in Magnetorheologicai polishing liquid, non magnetic abrasive material with ultrasonic agitation technology is equal
Even dispersion.
Summary of the invention
A kind of rotary ultrasonic vibration dispersion system is provided it is an object of the invention to avoid the deficiencies in the prior art place
And a kind of device and method for carrying out the strong mixing flow field dispersion of Magnetorheologicai polishing liquid using rotary ultrasonic vibration dispersion system.
The purpose of the present invention can be realized by using following technical measures, design a kind of rotary ultrasonic vibration dispersion
System, comprising: the first motor, the first retarder, the first reducer output shaft, connection main shaft, carbon brush, copper ring, ultrasonic wave hair
Raw device, PZT (piezoelectric transducer), amplitude transformer, helical blade tool heads, amplitude transformer ring flange, tubular inner casing, drive end bearing bracket, bearing, tubular
Shell, rear end cap and connection sleeve；
Wherein, the output shaft of first motor is connect with the input shaft of the first retarder by a shaft coupling, described
The output shaft of first retarder is connected with the one end for connecting main shaft by a shaft coupling, one end of the drive end bearing bracket and tubular inner casing
It is bolted, to close the opening of cartridge type inner casing, connects the other end setting screw thread of main shaft, interior spiral shell is arranged in drive end bearing bracket center
Pit, the other end for connecting main shaft are attached with drive end bearing bracket by being threadedly engaged；The other end and luffing of the tubular inner casing
Bar ring flange is bolted, and amplitude transformer ring flange is fixed in amplitude transformer, and amplitude transformer passes through rear end cap, and the two keeps felt
Circle sealing；
The amplitude transformer is placed in cartridge type inner housing inner, and one end pass through with the PZT (piezoelectric transducer) for being placed in cartridge type inner housing inner it is double
Header stud connection, the other end of the amplitude transformer are connect with helical blade tool heads by studs；
Tubular inner casing outer diameter is provided with outer sleeve, and outer sleeve is equal with the inner ring diameter of bearing, outer sleeve is fixed on
In the inner ring of bearing, cartridge type shell is fixed on the outside of bearing outer ring, so that tubular inner casing passes through bearing with connection main shaft in tubular
It is turned round in shell；One end of the cylindrical outer casing is bolted with rear end cap, and the other end is connect on the outside of main shaft with being set to
One end of connection sleeve be bolted, the shell for connecting the other end and the first retarder of sleeve is bolted,
To will connect sleeve, cylindrical outer casing, the first retarder cage connection be an entirety；
PZT (piezoelectric transducer), amplitude transformer, helical blade tool heads and tubular inner casing edge connection main-shaft core axisymmetrical, and
It is rotated with the rotation of connection main shaft；
Copper ring is fixed on the connection main shaft, and the two keeps insulated contact, and the copper ring outer wall also sets up carbon brush, carbon brush
Sliding contact is kept with copper ring；The copper ring is connected with PZT (piezoelectric transducer) by conducting wire；Ultrasonic signal is by supersonic generator
It generates, imports by carbon brush and copper ring to PZT (piezoelectric transducer), so that amplitude transformer and helical blade tool heads be driven to carry out supersonic frequency
Mechanical oscillation.
The purpose of the present invention can realize by using following technical measures, design a kind of Magnetorheologicai polishing liquid and mix by force
Collaborating field dispersal device including the rotary ultrasonic vibration dispersion system as described in preceding solution further includes upper cover, lower envelope
Head, the taper inner cylinder for holding Magnetorheologicai polishing liquid, liquid valve, taper inner cylinder shell, belt gear, the second retarder
And second motor；
Upper cover is bolted with lower head, and the lower head is used to support the weight of whole device；The taper
Inner cylinder is set in the space that upper cover and lower head are formed, and the taper inner cylinder shell is set on the outside of taper inner cylinder, with cone
Shape inner cylinder shell is bolted as an entirety；Two rotary ultrasonic vibration dispersion systems are set and are each passed through upper cover spy
Enter in taper inner cylinder, two rotary ultrasonic vibration dispersion systems along taper inner cylinder axisymmetrical be distributed, and respectively with taper
Inner cylinder wall surface keeping parallelism；The cylindrical outer casing of the rotary ultrasonic vibration dispersion system is bolted with upper cover；It is described
Upper cover is additionally provided with feed inlet, and the Magnetorheologicai polishing liquid is by the feed inlet injection taper inner cylinder of upper cover；The taper
The lower wall of inner cylinder is equipped with liquid valve, and the lower section of taper inner cylinder shell is equipped with discharge port, so as to by mixed Magnetorheological Polishing
Liquid discharge；The bottom center of the taper inner cylinder shell is connect by belt gear with the second retarder；Described second subtracts
Fast device is connect with the second motor by shaft coupling, does rotary motion to control taper inner cylinder and taper inner cylinder shell；It is described
It is additionally provided with bearing support between taper inner cylinder shell and lower head, is being rotated through with weakening taper inner cylinder and taper inner cylinder shell
Radial vibration in journey.
Wherein, the length L of the helical blade tool heads of two groups of rotary ultrasonic vibration dispersion systems1And L2Approximate formula
It is as follows:
In formula, n1And n2Respectively positive integer, c are the velocity of sound of helical blade tool heads, f1And f2Respectively rotary ultrasonic shakes
The resonance frequency of dynamic decentralized system, the frequency are adjusted by the supersonic generator of different frequency.
Wherein, the resonance frequency f of rotary ultrasonic vibration dispersion systemiWith grain diameter di0Using following formula approximation meter
It calculates:
In formula, i=1,2, γ are adiabatic exponent, p0For hydrostatic pressure, σ is saturated vapor pressure；
Resonance frequency is f1Rotary ultrasonic vibration dispersion system, be d for dispersing in Magnetorheologicai polishing liquid partial size1?
Grain, resonance frequency f2Rotary ultrasonic vibration dispersion system, be d for dispersing in Magnetorheologicai polishing liquid partial size2Particle, lead to
Overregulate f1And f2, realize that Magnetorheologicai polishing liquid magnetic-particle and non magnetic abrasive grain are in best mixing dispersion effect.
The purpose of the present invention can be realized by using following technical measures, propose that a kind of Magnetorheologicai polishing liquid mixes by force
Collaborate field dispersing method, magnetic current is carried out using the strong mixing flow field dispersal device of Magnetorheologicai polishing liquid as described in preceding solution
Become polishing fluid to mix by force, comprising:
Magnetorheologicai polishing liquid is injected into taper inner cylinder by the feed inlet of upper cover；
Second motor is driven by the second retarder and belt gear, drives taper inner cylinder and taper inner cylinder shell
Carry out rotary motion；
Meanwhile the first motor and the first retarder drive helical blade tool of two groups of rotary ultrasonic vibration dispersion systems
Head carries out rotary motion, is stirred for the first time to Magnetorheologicai polishing liquid；
The rotary motion of the helical blade tool heads makes Magnetorheologicai polishing liquid along the continuous convection current of taper inner cylinder, cuts
It cuts, spread, mix, to form the mixing flow field of dispersion Magnetorheologicai polishing liquid particle；
The ultrasonic wave that supersonic generator is generated is passed in PZT (piezoelectric transducer), and Ultrasonic transformation is height by PZT (piezoelectric transducer)
Frequency mechanical oscillation, amplitude transformer pass to helical blade tool heads after amplifying high-frequency mechanical vibration, thus the shape in taper inner cylinder
At strong ultrasonic field；
Magnetorheologicai polishing liquid forms cavitation field under some strength ultrasound field action, and a large amount of plays are generated inside cavitation field
The cavitation bubble of strong oscillation, the impact energy for acutely vibrating and its discharging when crumbling and fall of cavitation bubble is to dispersion Magnetorheologicai polishing liquid particle
In magnetic-particle and non magnetic abrasive grain carry out high force dispersion, to play the mixing flow field for strengthening Magnetorheologicai polishing liquid
Effect.
It is different from the prior art, the beneficial effects of the present invention are: the rotary motion of taper inner cylinder and rotary ultrasonic vibration point
The rotary motion for the system of dissipating will form the mixing flow field of dispersion Magnetorheologicai polishing liquid particle, ensure that Magnetorheologicai polishing liquid in device
Interior flow field circulation；At the same time, the ultrasound cavitation effect that rotary ultrasonic vibration dispersion system generates can be to Magnetorheologicai polishing liquid
Mixing flow field effectively strengthened；The cavitation bubble and cavitation bubble that ultrasonic cavitation generates are crumbled and fall a series of high temperature, the height of generation
Pressure, shock wave and microjet is equivalent that the magnetic-particle of reunion, non magnetic abrasive grain and other small particles should be able to suspend
Liquid particle is uniformly mixed dispersion, or the particle settled is dispersed again, to improve Magnetorheologicai polishing liquid preparation
With the reliability in use process.By means of the invention it is possible to magnetorheological throwing on the basis of existing mixing flow field dispersal device
Light liquid generates strong ultrasound cavitation effect, to promote the uniformly mixed dispersibility of non magnetic abrasive material and magnetic-particle.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of rotary ultrasonic vibration dispersion system provided by the invention；
Fig. 2 is a kind of structural schematic diagram of the strong mixing flow field dispersal device of Magnetorheologicai polishing liquid provided by the invention；
Fig. 3 is a kind of flow diagram of the strong mixing flow field dispersing method of Magnetorheologicai polishing liquid provided by the invention.
In figure: the first motor of 1-；The first retarder of 2-；The first reducer output shaft of 3-；4- connection main shaft；5- carbon brush；
6- copper ring；7- supersonic generator；8- PZT (piezoelectric transducer)；9- amplitude transformer；91- amplitude transformer ring flange；10- helical blade tool
Head；11- tubular inner casing；12- outer sleeve；13- drive end bearing bracket；14- bearing；15- cylindrical outer casing；16- rear end cap；17- connection sleeve；
18- upper cover；19- lower head；20- taper inner cylinder；21- Magnetorheologicai polishing liquid；22- liquid valve；23- taper inner cylinder shell；24-
Belt gear；The second retarder of 25-；The second motor of 26-.
Specific embodiment
Further more detailed description is made to technical solution of the present invention With reference to embodiment.Obviously, it is retouched
The embodiment stated is only a part of the embodiments of the present invention, instead of all the embodiments.Based on the embodiments of the present invention,
Those of ordinary skill in the art's every other embodiment obtained without creative labor, all should belong to
The scope of protection of the invention.
Refering to fig. 1, Fig. 1 is a kind of structural schematic diagram of rotary ultrasonic vibration dispersion system provided by the invention.The device
Include:
First motor 1, the first retarder 2, the first reducer output shaft 3, connection main shaft 4, carbon brush 5, copper ring 6, ultrasound
Wave producer 7, PZT (piezoelectric transducer) 8, amplitude transformer 9, helical blade tool heads 10, amplitude transformer ring flange 91, tubular inner casing 11, housing
Cylinder 12, drive end bearing bracket 13, bearing 14, cylindrical outer casing 15, rear end cap 16 and connection sleeve 17；
Wherein, the output shaft of first motor 1 is connect with the input shaft of the first retarder 2 by a shaft coupling, institute
The output shaft 3 for stating the first retarder is connected with the one end for connecting main shaft 4 by a shaft coupling, the drive end bearing bracket 13 and tubular inner casing
11 one end is bolted, and to close the opening of cartridge type inner casing 11, screw thread, drive end bearing bracket is arranged in the other end of connection main shaft 4
Internal thread hole is arranged in 13 centers, and the other end for connecting main shaft 4 is attached with drive end bearing bracket 13 by being threadedly engaged；In the tubular
The other end of shell 11 is bolted with amplitude transformer ring flange 91, and amplitude transformer ring flange 91 is fixed in amplitude transformer 9, amplitude transformer
9 pass through rear end cap 16, and the two keeps felt-ring seal；
Amplitude transformer 9 is placed in inside cartridge type inner casing 11, and one end passes through with the PZT (piezoelectric transducer) 8 being placed in inside cartridge type inner casing 11
Studs connection, the other end of the amplitude transformer 9 are connect with helical blade tool heads 10 by studs；
11 outer diameter of tubular inner casing is provided with outer sleeve 12, and outer sleeve 12 is equal with the inner ring diameter of bearing 14, by housing
Cylinder 12 is fixed in the inner ring of bearing 14, and cartridge type shell 15 is fixed on the outside of 14 outer ring of bearing, so that tubular inner casing 11 passes through axis
14 are held to turn round in cylindrical outer casing 15 with connection main shaft 4；One end of the cylindrical outer casing 15 is bolted with rear end cap 16,
The other end is bolted with the one end for connecting the connection sleeve 14 in 4 outside of main shaft is set to, and connects the other end of sleeve 14
It is bolted with the shell of the first retarder 2, thus the shell that sleeve 17, cylindrical outer casing 15, the first retarder 2 will be connected
It is connected as an entirety；
PZT (piezoelectric transducer) 8, amplitude transformer 9, helical blade tool heads 10 and tubular inner casing 11 are along connection 4 central axis pair of main shaft
Claim, and is rotated with the rotation of connection main shaft 4；
Copper ring 6 is fixed on the connection main shaft 4, and the two keeps insulated contact, and 6 outer wall of copper ring also sets up carbon brush 5,
Carbon brush 5 and copper ring 6 keep sliding contact；The copper ring 6 is connected with PZT (piezoelectric transducer) 8 by conducting wire；Supersonic generator 7 connects
Carbon brush 5, ultrasonic signal are generated by supersonic generator 7, are imported by carbon brush 5 and copper ring 6 to PZT (piezoelectric transducer) 8, thus band
Dynamic amplitude transformer 9 and helical blade tool heads 10 carry out supersonic frequency mechanical oscillation.
As shown in Fig. 2, the structure that Fig. 2 is a kind of strong mixing flow field dispersal device of Magnetorheologicai polishing liquid provided by the invention is shown
It is intended to.The device includes:
Rotary ultrasonic vibration dispersion system as described in preceding solution further includes upper envelope such as 001 and 002 in Fig. 2
First 18, lower head 19, the taper inner cylinder 20 for holding Magnetorheologicai polishing liquid 21, liquid valve 22, taper inner cylinder shell 23, belt
Transmission mechanism 24, the second retarder 25 and the second motor 26；
Upper cover 18 is bolted with lower head 19, and the lower head 19 is used to support the weight of whole device；Cone
Shape inner cylinder 20 is set in the space that upper cover 18 and lower head 19 are formed, and the taper inner cylinder shell 23 is set to taper inner cylinder
20 outsides, are bolted with taper inner cylinder shell 23 as an entirety；Two rotary ultrasonic vibration dispersion systems 001 are set
It is each passed through upper cover 18 with 002 to probe into taper inner cylinder 20, two rotary ultrasonic vibration dispersion systems 001 and 002 are along cone
20 axisymmetrical of shape inner cylinder distribution, and respectively with 20 wall surface keeping parallelism of taper inner cylinder；Rotary ultrasonic vibration dispersion system 001
Cylindrical outer casing 15 with 002 is bolted with upper cover 18；The upper cover 18 is additionally provided with feed inlet, the magnetorheological throwing
Light liquid 21 is by the feed inlet injection taper inner cylinder 20 of upper cover 18；The lower wall of the taper inner cylinder 20 is equipped with liquid valve
22, the lower section of taper inner cylinder shell 23 is equipped with discharge port, so that mixed Magnetorheologicai polishing liquid to be discharged；Taper inner cylinder shell
23 bottom center is connect by belt gear 24 with the second retarder 25；Second retarder 25 and the second motor
26 are connected by shaft coupling, do rotary motion to control taper inner cylinder 20 and taper inner cylinder shell 23；Outside the taper inner cylinder
It is additionally provided with bearing support between shell 23 and lower head 19, to weaken taper inner cylinder 20 and taper inner cylinder shell 23 in rotary course
In radial vibration.
Preferably, the length L of the helical blade tool heads of two groups of rotary ultrasonic vibration dispersion systems 001 and 0021And L2Closely
It is as follows like calculation formula:
In formula, n1And n2Respectively positive integer, c are the velocity of sound of helical blade tool heads, f1And f2Respectively rotary ultrasonic shakes
The resonance frequency of dynamic decentralized system, the frequency are adjusted by the supersonic generator of different frequency.
Preferably, the resonance frequency f of rotary ultrasonic vibration dispersion system 001 and 002iWith grain diameter di0Using following public affairs
Formula approximate calculation:
In formula, i=1,2, γ are adiabatic exponent, p0For hydrostatic pressure, σ is saturated vapor pressure；
Resonance frequency is f1Rotary ultrasonic vibration dispersion system, be d for dispersing in Magnetorheologicai polishing liquid partial size1?
Grain, resonance frequency f2Rotary ultrasonic vibration dispersion system, be d for dispersing in Magnetorheologicai polishing liquid partial size2Particle, lead to
Overregulate f1And f2, realize that Magnetorheologicai polishing liquid magnetic-particle and non magnetic abrasive grain are in best mixing dispersion effect.
In addition, the present invention also provides a kind of strong mixing flow field dispersing methods of Magnetorheologicai polishing liquid, using such as aforementioned techniques
The strong mixing flow field dispersal device of Magnetorheologicai polishing liquid described in scheme carries out Magnetorheologicai polishing liquid and mixes by force, comprising:
Magnetorheologicai polishing liquid 21 is injected into taper inner cylinder 20 by the feed inlet of upper cover 18；
Second motor 26 is driven by the second retarder 25 and belt gear 24, drives taper inner cylinder 20 and taper
Inner cylinder shell 23 carries out rotary motion；
Meanwhile the first motor 1 and the first retarder 2 drive spiral shell of two groups of rotary ultrasonic vibration dispersion systems 001 and 002
Vane piece tool heads 10 carry out rotary motion, are stirred for the first time to Magnetorheologicai polishing liquid；
The rotary motion of helical blade tool heads 10 makes Magnetorheologicai polishing liquid along the continuous convection current of taper inner cylinder 20, cuts
It cuts, spread, mix, to form the mixing flow field of dispersion Magnetorheologicai polishing liquid particle；
Ultrasonic wave that supersonic generator 7 is generated is passed in PZT (piezoelectric transducer) 8, and PZT (piezoelectric transducer) 8 is by Ultrasonic transformation
For high-frequency mechanical vibration, amplitude transformer 9 passes to helical blade tool heads 10 after amplifying high-frequency mechanical vibration, thus in taper
Strong ultrasonic field is formed in cylinder 20；
Magnetorheologicai polishing liquid 21 forms cavitation field under some strength ultrasound field action, and generates largely inside cavitation field
The cavitation bubble acutely vibrated, the impact energy for acutely vibrating and its discharging when crumbling and fall of cavitation bubble is to dispersion Magnetorheologicai polishing liquid
Magnetic-particle and non magnetic abrasive grain in grain carry out high force dispersion, to play the mixing flow field for strengthening Magnetorheologicai polishing liquid
Effect.
It is different from the prior art, the beneficial effects of the present invention are: the rotary motion of taper inner cylinder and rotary ultrasonic vibration point
The rotary motion for the system of dissipating will form the mixing flow field of dispersion Magnetorheologicai polishing liquid particle, ensure that Magnetorheologicai polishing liquid in device
Interior flow field circulation；At the same time, the ultrasound cavitation effect that rotary ultrasonic vibration dispersion system generates can be to Magnetorheologicai polishing liquid
Mixing flow field effectively strengthened；The cavitation bubble and cavitation bubble that ultrasonic cavitation generates are crumbled and fall a series of high temperature, the height of generation
Pressure, shock wave and microjet is equivalent that the magnetic-particle of reunion, non magnetic abrasive grain and other small particles should be able to suspend
Liquid particle is uniformly mixed dispersion, or the particle settled is dispersed again, to improve Magnetorheologicai polishing liquid preparation
With the reliability in use process.By means of the invention it is possible to magnetorheological throwing on the basis of existing mixing flow field dispersal device
Light liquid generates strong ultrasound cavitation effect, to promote the uniformly mixed dispersibility of non magnetic abrasive material and magnetic-particle.
The above is only embodiments of the present invention, are not intended to limit the scope of the invention, all to utilize the present invention
Equivalent structure or equivalent flow shift made by specification and accompanying drawing content is applied directly or indirectly in other relevant technologies
Field is included within the scope of the present invention.
Claims (5)
1. a kind of rotary ultrasonic vibration dispersion system characterized by comprising the first motor, the first retarder, first are slowed down
Device output shaft, carbon brush, copper ring, supersonic generator, PZT (piezoelectric transducer), amplitude transformer, helical blade tool heads, becomes connection main shaft
Width bar ring flange, tubular inner casing, drive end bearing bracket, bearing, cylindrical outer casing, rear end cap and connection sleeve；
Wherein, the output shaft of first motor is connect with the input shaft of the first retarder by a shaft coupling, and described first
The output shaft of retarder is connected with the one end for connecting main shaft by a shaft coupling, and one end of the drive end bearing bracket and tubular inner casing passes through
It is bolted, to close the opening of cartridge type inner casing, connects the other end setting screw thread of main shaft, internal screw thread is arranged in drive end bearing bracket center
Hole, the other end for connecting main shaft are attached with drive end bearing bracket by being threadedly engaged；The other end and amplitude transformer of the tubular inner casing
Ring flange is bolted, and amplitude transformer ring flange and amplitude transformer are integrally formed, and amplitude transformer passes through rear end cap, and the two is kept
Felt-ring seal；；The amplitude transformer is placed in cartridge type inner housing inner, and one end passes through with the PZT (piezoelectric transducer) for being placed in cartridge type inner housing inner
Studs connection, the other end of the amplitude transformer are connect with helical blade tool heads by studs；
Tubular inner casing outer diameter is provided with outer sleeve, and outer sleeve is equal with the inner ring diameter of bearing, outer sleeve is fixed on bearing
Inner ring in, cartridge type shell is fixed on the outside of bearing outer ring so that tubular inner casing by bearing with connection main shaft in cylindrical outer casing
Middle revolution；One end of the cylindrical outer casing is bolted with rear end cap, the other end be set to the company connecting on the outside of main shaft
One end of female connector cylinder is bolted, and the shell for connecting the other end and the first retarder of sleeve is bolted, thus
Cage connection by connection sleeve, cylindrical outer casing, the first retarder is an entirety；
PZT (piezoelectric transducer), amplitude transformer, helical blade tool heads and tubular inner casing edge connection main-shaft core axisymmetrical, and with even
It connects the rotation of main shaft and rotates；
Copper ring is fixed on the connection main shaft, and the two keeps insulated contact, and the copper ring outer wall also sets up carbon brush, carbon brush and copper
Ring keeps sliding contact；The copper ring is connected with PZT (piezoelectric transducer) by conducting wire；Ultrasonic signal is generated by supersonic generator,
It imports by carbon brush and copper ring to PZT (piezoelectric transducer), so that amplitude transformer and helical blade tool heads be driven to carry out the vibration of supersonic frequency machinery
It is dynamic.
2. a kind of strong mixing flow field dispersal device of Magnetorheologicai polishing liquid, including rotary ultrasonic as described in claim 1 vibration point
Dissipate system, which is characterized in that further include upper cover, lower head, the taper inner cylinder for holding Magnetorheologicai polishing liquid, liquid valve,
Taper inner cylinder shell, belt gear, the second retarder and the second motor；
Wherein, the upper cover is bolted with lower head, and the lower head is used to support the weight of whole device；It is described
Taper inner cylinder is set in the space that upper cover and lower head are formed, and the taper inner cylinder shell is set on the outside of taper inner cylinder,
It is bolted with taper inner cylinder shell as an entirety；Two rotary ultrasonic vibration dispersion systems are set and are each passed through envelope
Head probe into taper inner cylinder, two rotary ultrasonic vibration dispersion systems along taper inner cylinder axisymmetrical be distributed, and respectively with
Taper inner cylinder wall surface keeping parallelism；The cylindrical outer casing of the rotary ultrasonic vibration dispersion system is bolted with upper cover；
The upper cover is additionally provided with feed inlet, and the Magnetorheologicai polishing liquid is by the feed inlet injection taper inner cylinder of upper cover；It is described
The lower wall of taper inner cylinder is equipped with liquid valve, and the lower section of taper inner cylinder shell is equipped with discharge port, so as to will be mixed magnetorheological
Polishing fluid discharge；The bottom center of the taper inner cylinder shell is connect by belt gear with the second retarder；Described
Two retarders are connect with the second motor by shaft coupling, do rotary motion to control taper inner cylinder and taper inner cylinder shell；
It is additionally provided with bearing support between the taper inner cylinder shell and lower head, is being revolved with weakening taper inner cylinder and taper inner cylinder shell
Radial vibration during turning.
3. the strong mixing flow field dispersal device of Magnetorheologicai polishing liquid according to claim 2, which is characterized in that two groups of rotations are super
The length L of the helical blade tool heads of acoustic vibration decentralized system1And L2Approximate formula is as follows:
In formula, n1And n2Respectively positive integer, c are the velocity of sound of helical blade tool heads, f1And f2Respectively rotary ultrasonic vibration point
The resonance frequency for the system of dissipating, the frequency are adjusted by the supersonic generator of different frequency.
4. the strong mixing flow field dispersal device of Magnetorheologicai polishing liquid according to claim 2, which is characterized in that rotary ultrasonic vibration
The resonance frequency f of dynamic decentralized systemiWith grain diameter di0Using following formula approximate calculation:
In formula, i=1,2, γ are adiabatic exponent, p0For hydrostatic pressure, σ is saturated vapor pressure；
Resonance frequency is f1Rotary ultrasonic vibration dispersion system, be d for dispersing in Magnetorheologicai polishing liquid partial size1Particle, it is humorous
Vibration frequency is f2Rotary ultrasonic vibration dispersion system, be d for dispersing in Magnetorheologicai polishing liquid partial size2Particle, pass through adjusting
f1And f2, realize that Magnetorheologicai polishing liquid magnetic-particle and non magnetic abrasive grain are in best mixing dispersion effect.
5. a kind of strong mixing flow field dispersing method of Magnetorheologicai polishing liquid, using the Magnetorheologicai polishing liquid as described in claim 2-4
Strong mixing flow field dispersal device carries out Magnetorheologicai polishing liquid and mixes by force characterized by comprising
Magnetorheologicai polishing liquid is injected into taper inner cylinder by the feed inlet of upper cover；
Second motor is driven by the second retarder and belt gear, and taper inner cylinder and taper inner cylinder shell is driven to carry out
Rotary motion；
Meanwhile two groups of rotary ultrasonic vibration dispersion systems the first motor and the first retarder drive helical blade tool heads into
Row rotary motion stirs Magnetorheologicai polishing liquid for the first time；
The rotary motion of the helical blade tool heads makes Magnetorheologicai polishing liquid along the continuous convection current of taper inner cylinder, shearing, expansion
It dissipates, mixing, to form the mixing flow field of dispersion Magnetorheologicai polishing liquid particle；
The ultrasonic wave that supersonic generator is generated is passed in PZT (piezoelectric transducer), and Ultrasonic transformation is High-frequency machine by PZT (piezoelectric transducer)
Tool vibration, amplitude transformer pass to helical blade tool heads after amplifying high-frequency mechanical vibration, to be formed in taper inner cylinder strong
Strong ultrasonic field；
Magnetorheologicai polishing liquid forms cavitation field under some strength ultrasound field action, and a large amount of acutely vibrations are generated inside cavitation field
The cavitation bubble swung, the impact energy for acutely vibrating and its discharging when crumbling and fall of cavitation bubble is in dispersion Magnetorheologicai polishing liquid particle
Magnetic-particle and non magnetic abrasive grain carry out high force dispersion, to play the work for strengthening the mixing flow field of Magnetorheologicai polishing liquid
With.
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| CN110315399A (en) * | 2019-07-05 | 2019-10-11 | 太原理工大学 | The fine gear finishing processing device and processing method of near-field ultrasound cavitation compound fluid shearing |
| CN111070073A (en) * | 2019-12-31 | 2020-04-28 | 中国计量大学 | Inner cylindrical surface hydrodynamic cavitation reinforcing abrasive flow polishing system |
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