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ultrasonic metal melt Grain refinement treatment system

Le 5 septembre 2017, 04:42 dans Humeurs 0

High-power ultrasonic metal melt treatment system driven by ultrasonic vibration components and special ultrasonic power of two parts: ultrasonic vibration components mainly including high-power ultrasonic transducer, ultrasonic transformers, tool head (launch), is used to generate ultrasonic vibration, and vibratory energy to the launch of metallic melts. Transducer the input electrical energy into mechanical energy, the ultrasound. The form is a transducer in longitudinal slip movement back and forth, amplitude generally within a few microns. So the amplitude of the power density is not enough, can not be used directly. The amplitude according to the need to enlarge the amplitude of design, isolate the metal melt and heat transfer, at the same time also have the effect of fixed the ultrasonic vibration system. Tool head is connected with the amplitude and the amplitude to ultrasonic vibration is passed to the tool head energy, again by the tool head would launch ultrasonic energy into the metallic melts.

According to the different requirements of production equipment, the structure of ultrasonic processor and the size can be changed correspondingly.
Ultrasonic special driving power source (supersonic generator) including rectifier circuit, oscillating circuit, amplifying circuit, feedback circuit, the track circuit, protection circuit, matching circuit and display instrument, etc. Used to produce high-frequency high power current, driven by ultrasonic vibration components work. The power adjustable ultrasonic generator, so as to adapt to different working condition. Within the generator can also be according to the need to integrate with timing controller, set control ultrasonic vibration time and interval time.

Ultrasound applied in the metal melt processing there are also two special difficulties, namely, high temperature and corrosion. We all know that the core component of the piezoelectric ultrasonic transducer is the piezoelectric ceramic piece, it is only after a high voltage polarization has a piezoelectric properties. If temperature exceeds 80 ℃, the piezoelectric ceramic is depolarization, piezoelectric performance will decline, and the drop is not reversible. Followed by the metal melt temperature is generally high, the temperature of the black metal even more than one thousand degrees. Launch head to immersed in the melt, but also high power ultrasonic launch, will be affected by the ultrasonic dual role of corrosion and the molten metal liquid corrosion. This processor is proposed to design and manufacture of ultrasonic metal melt with high requirements. Fortunately, after successful people unremitting efforts, all these problems have been solved. We will according to the present situation and the requirements of users, tailored to meet the requirement of the users to use metallic melts processor.

2, the application methods:

With the typical structure, for example, ultrasonic launch metallic melts the processor is a round bar. After the molten metal, just insert the firing head metal melt, can emit ultrasonic to metallic melts. Vibration system enclosure front flange used for fixation. Due to the ultrasonic vibration system has no moving parts and mechanical parts, the fixed no special requirements. Treated melt in a specific container, such as crucible furnace, crystal furnace. Tool head inserted into the melt, the side of launch ultrasonic wave. In general, it is suggested that in the melt cools down to join ultrasound, to melt in the cooling crystallization was also strong ultrasonic effect. Treated melt quantity may be less more. For specific melt treated the less amount of melt, the output power of ultrasonic generator, ultrasonic action, the longer the ultrasonic synthesis strength is high. Similarly, we also can by controlling the amount of melt, the size of the ultrasonic generator output power, and the ultrasonic action time, to control the intensity of the ultrasonic function. Due to the characteristics of all kinds of metal materials and different requirements, the function and effect of ultrasound is also each are not identical. In view of the performance requirements of the particular metal users, only through trial and error for many times, find the best balance of ultrasound intensity and actual effect, thus, the best processing technology.

The function :

High-power ultrasonic effect on the crystallization of molten metal process, can significantly refine metal grain, homogeneous alloy composition, accelerate the bubble motion, significantly improve the metal material properties, such as strength, hardness, plasticity and toughness.

The data:

 Type:DW-JS20-2000
Frequency:20KHz
Power:2000w
input voltage:220v50hz
max temperaturer:850(℃)
diameter of horn(probe):50mm
Ultrasonic generator:digital generator

ultrasonic sprayer atomizier

Le 4 septembre 2017, 08:16 dans Humeurs 0


Ultrasonic atomizer explain:
Ultrasonic spray (spray) is the use of ultrasonic energy liquid water or break up, forming a few microns to 100 microns of the size of small particles, used for liquid air humidification, granulating, mixing, promote chemical reaction, spraying, powder metal spraying system, etc. High-power ultrasonic atomizing humidifying technology is the power source of high-power ultrasonic longitudinal transducer, combined with ultrasonic transducer, ultrasonic transformers(booster), launch(spray head), special driving power supply. Head for high frequency vibration transducer drive launch of applying ultrasonic wave force, water or other liquid dispersion of liquid will flow into fine particles, spray into the air, so as to achieve the aim of the spray (spray). Unlike conventional spray nozzles that rely on high velocity pressure to shear a fluid into small drops, the ultrasonic atomizer uses vibrational energy to generate a low velocity mist. Volumes can vary from microliters to liters, and atomizes continuously or intermittently.

• From microliters to liters – continuous or intermittent
• Dispenses material with virtually no overspray
• Pressureless atomization – low velocity mist
• Low cost atomizing probe replacement
• Minimal atmospheric contamination
• Virtually uncloggable
TYPICAL APPLICATIONS
• Coating non-woven fabric, paper, etc.
• Laboratory spray drying
• Injecting moisture into a gas stream
• Applying minute amount of oil, fragrance or
• flavor onto a product
• Injecting small volume of reagents into a reactor

MicroMist Ultrasonic Nozzle Benefits:
• Liquids are delivered through an external tube to the nozzle’s atomizing surface
• A low-pressure air stream through the nozzle’s central orifice entrains the spray and produces very tight, precise spray pattern
• Spray widths as low as 0.015″ (0.4 mm) are possible
• Soft, low-velocity atomized spray can be targeted with unmatched precision
• Minimal overspray (minimal waste)
• Ultra-low flow rates over a wide range (from 0.3 – 20 ml/S)
Ultrasonic atomizer characteristics:
Can work continuously 24 hours a day
The efficiency of the atomizer is high, single transducer's atomization amount is big. One unit of atomizer quantity can be more than 50L/h,
no any special requirements for the liquid type. Even the liquid which contain impurities or wastewater also can be atomized.
no pressure, no noise, no moving parts, no abrasion and blockage problem. Low energy consume, small size
it can working under high temperature up to 500℃,so that can using in metal powder
Can be any combination, to meet any requirements of the spray quantity,suitable for industry using
Using the high performance of titanium alloy and stainless steel manufacturing

Main configuration:
1*pcs spray head with Aluminum alloy housing
1*pcs generator (drive power supply)

This product can be customized according to the customers' actual situation and requirements, range:
Electric power: 30-500 watts
The transducer,tool head frequency: 15 KHZ - 55 KHZ
The input voltage: 110 v to 240 v;50 hz - 60 hz
Power adjust method: continuous or step type, the adjusting range is 60% 100%, can be installed power switch
Out Shell: aluminum alloy shell, it also can install the cooling fan and cooling holes on the out shell of high power machine
Launch(spray head): according to the need of deal with all kinds of liquid, corrosive conditions ,the spray head can be divided into:trumpet shape type, straight tubular type,
Material of spray head :stainless steel ;out shell: aluminum alloy,
Cable length: 2M or customized
Foot switch: available,
PLC control: available
Atomizing medium: ordinary water, all kinds of liquid substances, chemical liquid, all kinds of oil mucus, molten metal or impurity content is not more than 3% of the water
The diameter of the spray particles: 25um-100μm

Applicable industry: dedusting, textile, printing and dyeing, tobacco, flowers, telecommunications, paper, electronics, mushroom cultivation, fruit storage, atomized humidifying, chemical mixture, production, spray drying granulation, coating, fabric coating, metal powder and other industries.

For a given cleaner and frequency the standing wave pattern is fixed

Le 29 août 2017, 06:32 dans Humeurs 0

For example, a 40 KHz cleaner has sweep frequency deviations from the base value of about ±2 KHz, an effective design limit.We use ultrasonic cleaners routinely for a broad set of applications today. Any such resonance can be potentially damaging to that object. In case objects suspended in Ultrasonic Sprayer the mesh do not lie entirely within a rarefaction band, the cleaning action there and hence the cleaning efficiency reduces. Typical ultrasonic cleaners are integrated units. This is desirable, particularly for temperature-sensitive materials of the objects for cleaning.

By design, the base frequency is also the resonance frequency of the combined transducer-generator system. An additional beneficial ultrasonic probe homogenizer effect of these band variations, induced by the sweep frequency operation, is the increased uniformity of temperature distribution due to better mixing across the tank liquid volume and the suspended mesh. The distance between bands depends primarily on the frequency and tank geometry. The formation of millions of liquid vapor microbubbles occurs and they rapidly cool and condense back into the liquid, causing high-energy jets of liquid to fill the temporary void created by this condensation. Once energized, the transducer generates ultrasonic waves throughout the bath that interact with waves reflected from the tank sides to form a 'stationary' or standing wave pattern. This is most important when the objects for cleaning are delicate in material or construction. The objects for cleaning are suspended in a stainless steel wire mesh basket placed in the cleaning liquid bath. Yet another benefit of the sweep frequency mode is the reduction in the likelihood of induced resonance of objects for cleaning. They have a stainless steel cleaning tank, with one or more ultrasonic transducer units fixed to the bottom of the tank. For enhanced cleaning efficiency, it is advantageous to vary the transducer frequency in some range. This method of operation is the sweep frequency mode, available in high quality ultrasonic cleaner designs. If the sweep frequency circuit pushes the transducer too far off its natural resonance frequency, the deliverable power tends to decrease dramatically.

For a given cleaner and frequency the standing wave pattern is fixed. It also prevents the formation of 'hot spots'. The standing wave pattern formed in the liquid is a collection of alternating compression and rarefaction zones or bands. This creates a significant and continuous variation in the location of the compression and rarefaction bands, along with a variation in the distance between them. The sweep frequency circuit continuously alters the transducer frequency in a restricted range. These band variations subject all parts of the objects to regions of maximal cavitation and cleaning. The zones of maximal cavitation occur within the rarefaction bands. These jets hammer the contaminated objects with a field of high velocity small liquid jets that cause the intense cleaning action. Typical ultrasonic cleaners have sweep frequency ranges that span about ± 5% from the central frequency. They provide the user with high-efficiency, low-cycle time cleaning with simple push-button operation. Ideally, for uniform cleaning, their distribution should lie more or less equally across the entire object.

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