CN102664477B - Thermoelectricity cooling device of ultrasonic motor - Google Patents
Thermoelectricity cooling device of ultrasonic motor Download PDFInfo
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- CN102664477B CN102664477B CN201210122519.8A CN201210122519A CN102664477B CN 102664477 B CN102664477 B CN 102664477B CN 201210122519 A CN201210122519 A CN 201210122519A CN 102664477 B CN102664477 B CN 102664477B
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Abstract
The invention discloses a thermoelectricity cooling device of an ultrasonic motor. The thermoelectricity cooling device comprises the ultrasonic motor, a thermoelectric cooler, three cooling layers and an outside drive motor, wherein the thermoelectric cooler is in a square shape and is externally tangent to the circumference of a casing of the ultrasonic motor; a circular roller is arranged on the lower surface of the thermoelectric cooler; the three cooling layers are in the same structure and symmetrically connected through keyways at 120 degrees pairwise; the cooling layers are in a square cavity structure, and circular grooves are arranged on the upper surfaces of the cooling layers; the cavities are filled with inorganic salt phase change materials; and a spindle head of the outside drive motor is connected with the middle keyway of the three cooling layers. According to the thermoelectricity cooling device of the ultrasonic motor, the structure is compact, the size is small; the thermoelectric cooler is adopted to replace the existing motor metal bases, so that heat generated in a stator of the motor can be transferred quickly; and inorganic salt phase change is adopted for the cooling layers to absorb heat, a cooling circuit is not needed to be externally connected, and the thermoelectricity cooling device is suitable for situations with low mobility in sealed environments and can be recycled.
Description
Technical field
The present invention relates to a kind of thermoelectric cooling heat abstractor, relate in particular to a kind of thermoelectric radiating device of ultrasound electric machine, the continuous operation situation that it is suitable for the ultrasound electric machine long period under enclosed environment, can realize the long continuous operation of ultrasound electric machine under enclosed environment.
Background technology
The existing ultrasound electric machine situation of generating heat is at work serious, and general continuous operation 20min just has very high temperature rise, thereby causes the drift of ultrasound electric machine operating frequency, has affected the output characteristic of ultrasound electric machine.In traditional design, adopt fixedly ultrasound electric machine stator of aluminum base, utilize the capacity of heat transmission of aluminium that the operating heat of motor is derived from laundry, fall apart in external environment.Yet machine operation is under higher voltage conventionally, heat production is very serious, only depends on metallic conductor heat radiation can not meet the heat radiation requirement of motor, has caused electric machine temperature rise too fast, too high.Generally, after continuous operation half an hour, the performance of ultrasound electric machine will decline, so that can not long time continuous working.
Chinese patent publication No. is CN 101860122A, denomination of invention be < < heat-dissipating structure of motor stator > > Patent Application Publication the structure of a kind of motor stator heat radiation, it uses the flow through cooling set pattern of stator outside of cooling fluid to reach the object of cooling motor stator, and then has improved motor performance.Yet above-mentioned cooling system needs cooling line and cooling power source to drive liquid circulation motion, corresponding cooling system volume is comparatively huge, and structure is comparatively complicated, has also increased the installation dimension of motor, inapplicable for electrical micro-machine.
Chinese patent publication No. is CN 202004591U, denomination of invention be < < Miniature radiator for motor > > Patent Application Publication a kind of fin and air-cooled miniature radiator structure of utilizing, it uses the heating of miniature fin conductive motor, one side at fin is loaded onto convection fan, utilizes forced convertion to strengthen motor radiating.Said structure has increased motor radiating area, has reduced the temperature rise of motor, thereby has improved motor performance.Yet, for ultrasound electric machine, in stator, generate heat serious and rapid, utilize the thermal conductivity of metal fast the heat in stator not to be derived, the temperature of motor still can fast rise.In addition, air cooling system needs fan to carry out forced convertion heat radiation, and in some airtight occasions, air-cooled method is not suitable for.
Summary of the invention
Because the above-mentioned defect of prior art, technical problem to be solved by this invention is to provide a kind of thermoelectric cooling heat abstractor of ultrasound electric machine, and its volume is little, conducts heat fast, is applicable under enclosed environment, can guarantee the long continuous operation of ultrasound electric machine.
For achieving the above object, the invention provides a kind of thermoelectric radiating device of ultrasound electric machine, it comprises ultrasound electric machine, thermoelectric module, three heat dissipating layers and extraneous drive motors, wherein, described thermoelectric module is square, is cut in the circumference of the shell of described ultrasound electric machine outward; The upper surface of described thermoelectric module and the motor stator of described ultrasound electric machine weld together by bismuth tin solder, and lower surface is provided with circular roller; Described three heat dissipating layer structures are identical, by keyway, are between any two 120 ° of symmetrical connections; Described heat dissipating layer is square cavity body structure, and upper surface has circular groove; In described cavity, be filled with inorganic salts phase-change material; Described heat dissipating layer upper surface and described thermoelectric module lower surface by described circular groove with the interlock of described circular roller phase to be fixedly connected with; The spindle nose of described extraneous drive motors is connected with the keyway in the middle of described three heat dissipating layers.
According to the thermoelectric radiating device of above-mentioned ultrasound electric machine, wherein, the fusing point of described bismuth tin solder is 124 °.
According to the thermoelectric radiating device of above-mentioned ultrasound electric machine, wherein, described thermoelectric module is connected with DC power supply by wire.
According to the thermoelectric radiating device of above-mentioned ultrasound electric machine, wherein, described inorganic salts phase-change material is Cd (NO3) 24H2O.
According to the thermoelectric radiating device of above-mentioned ultrasound electric machine, wherein, the described heat dissipating layer left and right sides is provided with fills mouth, in order to fill described inorganic salts phase-change material.
According to the thermoelectric radiating device of above-mentioned ultrasound electric machine, wherein, after described inorganic salts phase-change material fusing, inject described heat dissipating layer or pour out from described heat dissipating layer.
According to the thermoelectric radiating device of above-mentioned ultrasound electric machine, wherein, the area of described heat dissipating layer is identical with the area of described thermoelectric radiating sheet.
According to the thermoelectric radiating device of above-mentioned ultrasound electric machine, wherein, the fusing point of described inorganic salts phase-change material is lower than the fusing point of described bismuth tin solder.
With existing cooling fluid refrigeration heat-radiation structure, air-cooled heat dissipation structure is compared, and in the present invention, the thermoelectric radiating apparatus structure of ultrasound electric machine is compact, size is little; It adopts thermoelectricity sheet to replace traditional motor metab, can transmit quickly the heat producing in motor stator; Heat dissipating layer adopts inorganic salts decalescence simultaneously, does not need external cooling circuit, is applicable to the little occasion of mobility in closed environment, and can be recycled.
Accompanying drawing explanation
Fig. 1 is the cross-sectional view of the thermoelectric radiating device of ultrasound electric machine of the present invention;
Fig. 2 is the front view of the thermoelectric radiating device of ultrasound electric machine of the present invention;
Fig. 3 is the vertical view of the thermoelectric radiating device of ultrasound electric machine of the present invention.
Embodiment
Below with reference to accompanying drawing, the technique effect of design of the present invention, concrete structure and generation is described further, to understand fully object of the present invention, feature and effect.
In the present invention, the thermoelectric cooling heat abstractor of ultrasound electric machine replaces the aluminum base of traditional ultrasound electric machine with thermoelectric module, and utilize heat dissipating layer to absorb the heat on thermoelectric module, and heat dissipating layer inside is filled with the inorganic salts phase-change material for absorbing heat, thereby effectively realize the thermoelectric radiating function of ultrasound electric machine, guarantee its continuous operation for a long time.
As shown in Figure 1, ultrasound electric machine thermoelectric cooling heat abstractor of the present invention comprises ultrasound electric machine, thermoelectric module 12, three heat dissipating layers and extraneous drive motors 20.Wherein, ultrasound electric machine comprises shell 1, spindle nose 2, rotor 3 and motor stator 4.Shell 1 is used for fixing ultrasound electric machine rotor 3 and motor stator 4, and the spindle nose 2 of ultrasound electric machine is for connecting load.The upper surface 11 of thermoelectric module 12 is connected with ultrasound electric machine stator 4.Like this, thermoelectric module 12 one side are ultrasound electric machine fixedly, can be used on the other hand conducting the heat in ultrasound electric machine stator 4.The upper surface 11 of thermoelectric module 12 is used bismuth tin solder 5 and 10 welding of bismuth tin solder with the contact-making surface of motor stator 4.Wherein, bismuth tin solder 5 is circle-shaped with bismuth tin solder 10 and is evenly distributed on contact-making surface, from Fig. 1, is shown as 2 contact points.As shown in Figures 2 and 3, in the present invention, three heat dissipating layer structures are identical, by keyway, are between any two 120 ° of symmetrical connections.The motor shaft head of extraneous drive motors 20 is connected with the keyway in the middle of three heat dissipating layers.
During ultrasound electric machine work, motor stator 4 produces heat, thermoelectric module 12 enters heat conduction in the heat dissipating layer that lower surface 14 connects with it, utilize the inner inorganic salts phase-change material 16 of heat dissipating layer to absorb heat, inorganic salts phase-change material starts to gradually become liquid by solid-state, in whole process, motor stator 4 temperature remain unchanged, until the covert material of inorganic salts all melts.
Bismuth tin solder 5 is one of conventional lead-free solders, has without whisker, and fusing point is lower, the advantage that solderability is good.In the present invention, temperature after ultrasound electric machine rises and the fusing point (59.4 °) of inorganic salts phase-change material all can not surpass the fusing point (124 °) of bismuth tin solder, can guarantee that like this in inorganic salts phase-change material fusing endothermic process, the weld layer between motor stator 4 and thermoelectric module 12 can not come off.
Thermoelectric module 12 is square, is cut in the circumference of ultrasound electric machine shell 1 outward.Thermoelectric module 12 lower surfaces 14 are designed with circular roller 9.Thermoelectric module 12 is connected with DC power supply with wire 13 by wire 6, and utilizes paltie effect to realize the transmission of heat in upper surface 11 and lower surface 14 both sides of thermoelectric module 12, thereby forms the stable temperature difference.Especially, can be by regulating voltage, size of current on thermoelectric module 12 control the refrigerating capacity on it in concrete using.
Three heat dissipating layers in the present invention are square cavity body structure, and its area is identical with the area of thermoelectric module 12.Heat dissipating layer upper surface is designed with circular groove 17, and it is connected mutually with the circular roller 9 on the lower surface 14 of thermoelectric cooling layer 12, has guaranteed that thermoelectric cooling layer and heat dissipating layer can close contacts.
Particularly, the packing material in three heat dissipating layers is generally all selected the inorganic salts phase-change material that specific heat capacity is large, such as Cd (NO3) 24H
2o etc.As shown in Figure 1, take first heat dissipating layer 8 as example, filling mouth 7 and the filling mouth 15 of 8 left and right sides designs of first heat dissipating layer are used for filling inorganic salts phase-change material.The fusing point that it should be noted that inorganic salts phase-change material must be far below the fusing point of bismuth tin solder, in order to avoid the weld layer of inorganic salts phase-change material when heat absorption thermoelectric module and motor stator comes off, inorganic salts phase-change material need to have the larger latent heat of fusion simultaneously, to absorb more heat, reduce the volume of melted material.While specifically using, 16 heating of inorganic salts phase-change material should be made after its fusing, from filling mouth 7 or 15, pack into.After sealing mouth, treat that material is cooled to solid-state can use afterwards naturally.During taking-up, also should after material melts completely, open sealing first to heat dissipating layer heating, be poured out.According to the different melted material of the different loadings of operating mode, different melted materials is directly connected to the time of heat radiation cooling piece continuous operation, is also the time of ultrasound electric machine continuous operation.
The specific works flow process of the thermoelectric radiating device of ultrasound electric machine of the present invention is as follows:
Thermoelectric module 12 starts refrigeration.The heat that motor stator 4 produces is at work delivered to lower surface 14 by the upper surface 11 of thermoelectric module 12, and then enters first heat dissipating layer 8.
Heat enters after first heat dissipating layer 8, and the inorganic salts phase-change material 16 of first heat dissipating layer 8 inside starts to absorb heat, self starts fusing simultaneously, by the solid-state liquid state that changes into gradually.In this process, inorganic salts phase-change material 16 can constantly absorb heat, and that the temperature of ultrasound electric machine inside keeps is during this period constant, until all fusings of inorganic salts phase-change material 16.
After phase-change material in first heat dissipating layer 8 all melts, extraneous drive motors 20 motions drive three heat dissipating layer rotations, circular roller 9 phase interlocks on circular groove 17 by second heat dissipating layer 18 upper surface and thermoelectric module 12 lower surfaces 14, guide second heat dissipating layer 18 enter before the position of first heat dissipating layer 8.Now extraneous drive motors 20 quits work, and second heat dissipating layer 18 started working afterwards, repeats the endothermic process of first heat dissipating layer 8.
Now, first heat dissipating layer 8 shifts out, and disengaging contacts with thermoelectric module 12 lower surfaces, finishes endothermic process, starts temperature-fall period.The liquid inorganic salts material loading in the chamber of the first heat dissipating layer 8 starts to extraneous heat release, is again solidified as solid-stately, so that follow-up, recycles.Before the 3rd heat dissipating layer 19 rests on, the position of second heat dissipating layer 18, waits second heat dissipating layer 18 to be replaced.
After a period of time, after the inorganic salts material of second heat dissipating layer 18 inside all melts, extraneous drive motors 20 moves again, rotate the 3rd heat dissipating layer 19 and substitute second heat dissipating layer 18, the 3rd heat dissipating layer starts heat absorption work, first heat dissipating layer 8 is got back to the position of the 3rd heat dissipating layer 19 before simultaneously, and its inner inorganic salts material has been solid-state by settable liquid, waits for that replace the 3rd heat dissipating layer 19 works on next time.Now second heat dissipating layer 18 shifts out, and disengaging contacts with thermoelectric module 12 lower surfaces, starts cooling solidification process.
When the 3rd heat dissipating layer 19 leaves the lower surface of thermoelectric module 12, first heat dissipating layer 8 moves into again, and so far, three fin have completed a circulation.So every heat dissipating layer operating time and cooling time ratio be 1: 2, thereby guarantee the abundant heat radiation of heat dissipating layer.The structure that three heat dissipating layers like this form recycles, and guarantees that its inner inorganic salts material absorbs heat and exothermic process fully, to reuse, has maintained the stable of ultrasound electric machine internal temperature.
In sum, this system is utilized the periodic duty of heat dissipating layer, in conjunction with the endothermic character of inorganic salts phase-change material, has reduced the inner heat producing in ultrasound electric machine work, effectively improve the ultrasound electric machine ability of operation continuously, be especially applicable to being operated in the temperature control of ultrasound electric machine in closed environment.The operating time of the thermoelectric radiating device of ultrasound electric machine of the present invention can be calculated acquisition according to the quality of the heat radiation power of thermoelectric module and inorganic salts phase-change material and the latent heat of fusion (J/g).Suitable design proportion can be so that heat abstractor continuous operation several hours, and ultrasound electric machine internal temperature remains unchanged.Than existing ultrasound electric machine heat dissipation technology, the present invention has extended the stream time of ultrasound electric machine, has expanded range of application.
More than describe preferred embodiment of the present invention in detail.The ordinary skill that should be appreciated that this area just can design according to the present invention be made many modifications and variations without creative work.Therefore, all technical staff in the art, all should be in the determined protection range by claims under this invention's idea on the basis of existing technology by the available technical scheme of logical analysis, reasoning, or a limited experiment.
Claims (8)
1. a thermoelectric radiating device for ultrasound electric machine, is characterized in that, comprises ultrasound electric machine, thermoelectric module, and three heat dissipating layers and extraneous drive motors, wherein, described thermoelectric module is square, is cut in the circumference of the shell of described ultrasound electric machine outward; The upper surface of described thermoelectric module and the motor stator of described ultrasound electric machine weld together by bismuth tin solder, and lower surface is provided with circular roller; Described three heat dissipating layer structures are identical, by keyway, are between any two 120 ° of symmetrical connections; Described heat dissipating layer is square cavity body structure, and upper surface has circular groove; In described cavity, be filled with inorganic salts phase-change material; Described heat dissipating layer upper surface and described thermoelectric module lower surface by described circular groove with the interlock of described circular roller phase to be fixedly connected with; The spindle nose of described extraneous drive motors is connected with the keyway in the middle of described three heat dissipating layers.
2. the thermoelectric radiating device of ultrasound electric machine according to claim 1, is characterized in that, described bismuth tin solder is lead-free solder, and its fusing point is 124 °.
3. the thermoelectric radiating device of ultrasound electric machine according to claim 1, is characterized in that, described thermoelectric module is connected with DC power supply by wire.
4. the thermoelectric radiating device of ultrasound electric machine according to claim 1, is characterized in that, described inorganic salts phase-change material is Cd (NO3) 24H2O.
5. the thermoelectric radiating device of ultrasound electric machine according to claim 1, is characterized in that, the described heat dissipating layer left and right sides is provided with fills mouth, in order to fill described inorganic salts phase-change material.
6. the thermoelectric radiating device of ultrasound electric machine according to claim 1, is characterized in that, after described inorganic salts phase-change material fusing, injects described heat dissipating layer or pours out from described heat dissipating layer.
7. the thermoelectric radiating device of ultrasound electric machine according to claim 1, is characterized in that, the area of described heat dissipating layer is identical with the area of described thermoelectric module.
8. the thermoelectric radiating device of ultrasound electric machine according to claim 1, is characterized in that, the fusing point of described inorganic salts phase-change material is lower than the fusing point of described bismuth tin solder.
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| CN201210122519.8A CN102664477B (en) | 2012-04-24 | 2012-04-24 | Thermoelectricity cooling device of ultrasonic motor |
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| CN201210122519.8A CN102664477B (en) | 2012-04-24 | 2012-04-24 | Thermoelectricity cooling device of ultrasonic motor |
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| CN102664477B true CN102664477B (en) | 2014-04-16 |
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| RU2552532C1 (en) * | 2014-07-08 | 2015-06-10 | Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Уфимский государственный авиационный технический университет" | Electrical machine cooling device |
| CN104201933B (en) * | 2014-09-03 | 2017-01-25 | 上海交通大学 | Liquid-cooling heat dissipation structure for ultrasonic motor |
| CN109857169A (en) * | 2018-12-14 | 2019-06-07 | 杰克缝纫机股份有限公司 | The temperature control equipment of sewing machine |
| CN109656279A (en) * | 2018-12-14 | 2019-04-19 | 杰克缝纫机股份有限公司 | The temprature control method of sewing machine |
| CN111496838B (en) * | 2020-04-30 | 2022-06-07 | 北京理工大学 | Active heat dissipation joint and bionic robot comprising same |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101170287A (en) * | 2007-11-27 | 2008-04-30 | 南京航空航天大学 | High-temperature rotary traveling wave ultrasonic motor |
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| JP2817289B2 (en) * | 1989-12-04 | 1998-10-30 | 日産自動車株式会社 | Traveling wave type ultrasonic motor |
| FR2838253B1 (en) * | 2002-04-03 | 2005-09-23 | Leroy Somer Moteurs | ROTATING ELECTRIC MACHINE WITH FORCED VENTILATION |
| JP2005318723A (en) * | 2004-04-28 | 2005-11-10 | Nsk Ltd | Ultrasonic motor |
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| CN101170287A (en) * | 2007-11-27 | 2008-04-30 | 南京航空航天大学 | High-temperature rotary traveling wave ultrasonic motor |
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| JP平3-178575A 1991.08.02 |
| JP特开2005-318723A 2005.11.10 |
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