CN109092615B - A rotorless jet spray fan - Google Patents
A rotorless jet spray fan Download PDFInfo
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- CN109092615B CN109092615B CN201810908642.XA CN201810908642A CN109092615B CN 109092615 B CN109092615 B CN 109092615B CN 201810908642 A CN201810908642 A CN 201810908642A CN 109092615 B CN109092615 B CN 109092615B
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- 239000007921 spray Substances 0.000 title claims abstract description 40
- 239000007788 liquid Substances 0.000 claims abstract description 226
- 239000012528 membrane Substances 0.000 claims abstract description 25
- 230000000737 periodic effect Effects 0.000 claims abstract description 13
- 238000005507 spraying Methods 0.000 claims abstract description 8
- 230000005484 gravity Effects 0.000 claims description 6
- 230000004044 response Effects 0.000 claims description 5
- 238000009434 installation Methods 0.000 claims description 3
- 230000010349 pulsation Effects 0.000 claims 2
- 238000000889 atomisation Methods 0.000 abstract description 17
- 239000002826 coolant Substances 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 239000012530 fluid Substances 0.000 description 5
- 230000017525 heat dissipation Effects 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 238000001816 cooling Methods 0.000 description 4
- 230000004907 flux Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000009826 distribution Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 239000002131 composite material Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 239000013013 elastic material Substances 0.000 description 2
- 238000009689 gas atomisation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 238000010146 3D printing Methods 0.000 description 1
- 239000000443 aerosol Substances 0.000 description 1
- 238000012271 agricultural production Methods 0.000 description 1
- 238000003491 array Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000000110 cooling liquid Substances 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000007641 inkjet printing Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000003973 irrigation Methods 0.000 description 1
- 230000002262 irrigation Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000004377 microelectronic Methods 0.000 description 1
- 239000000575 pesticide Substances 0.000 description 1
- 238000004663 powder metallurgy Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B17/00—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups
- B05B17/04—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods
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- Nozzles (AREA)
- Special Spraying Apparatus (AREA)
- Reciprocating Pumps (AREA)
Abstract
一种无转子射流喷雾风扇，包括电源控制系统、射流激励器、供液系统，电源控制系统连接射流激励器，通过电源控制系统输出周期性电压信号驱动射流激励器的振动膜在射流激励器中的两个独立腔体往复振动，使得射流激励器的两个腔体交替压缩和膨胀；所述供液系统用于提供喷雾所需液体。供液系统交替向射流激励器的两出口通道注入液体，在第一腔体对应的第一射流激励器出口通道和第二腔体对应的第二射流激励器出口通道内交替形成射流喷雾。该装置没有转子和轴承，其利用振动膜产生的声场、压力场和速度场多场协同作用对冷却液进行雾化，具有结构简单、控制方便、耐高温、可靠性高、雾化质量好和喷雾速度快等特点。
A rotorless jet spray fan, including a power control system, a jet exciter, and a liquid supply system, the power control system is connected to the jet exciter, and the vibration membrane of the jet exciter is driven by the power supply control system to output a periodic voltage signal in the jet exciter The two independent cavities vibrate back and forth, so that the two cavities of the jet actuator are alternately compressed and expanded; the liquid supply system is used to provide the liquid required for spraying. The liquid supply system alternately injects liquid into the two outlet channels of the jet actuator, and alternately forms jet spray in the outlet channel of the first jet actuator corresponding to the first cavity and the outlet channel of the second jet actuator corresponding to the second cavity. The device has no rotor and bearing, and uses the sound field, pressure field, and velocity field generated by the vibrating film to atomize the coolant. It has the advantages of simple structure, convenient control, high temperature resistance, high reliability, and good atomization quality. Features such as fast spray speed.
Description
技术领域technical field
本发明属于流体机械与传热传质领域，涉及一种无转子射流喷雾风扇。The invention belongs to the field of fluid machinery and heat and mass transfer, and relates to a rotorless jet spray fan.
背景技术Background technique
雾化是将液体喷射进入气体介质中，使之分散并碎裂成小颗粒液滴的过程，广泛应用于日常生活、工业、农业及医疗设备或装置中。在日常生活中有雾化加湿器、雾化气雾剂、喷墨打印等，工业领域利用雾化进行干燥、冷却、反应、喷涂、除尘等工艺过程以及粉末冶金、印刷电路、3D打印等制造过程，农业生产中利用雾化进行农药喷洒和农业灌溉来提高药物和水资源的利用率。Atomization is the process of spraying a liquid into a gas medium to disperse and break it into small droplets. It is widely used in daily life, industry, agriculture and medical equipment or devices. In daily life, there are atomized humidifiers, atomized aerosols, inkjet printing, etc. In the industrial field, atomization is used for drying, cooling, reaction, spraying, dust removal and other processes, as well as powder metallurgy, printed circuit, 3D printing and other manufacturing In the process of agricultural production, atomization is used for pesticide spraying and agricultural irrigation to improve the utilization rate of drugs and water resources.
另外，随着电子技术和MEMS技术的迅速发展，信息化系统的性能、微小型和集成度不断提升，电子器件在总功率大幅度增长的同时，物理尺寸越来越小，导致单位面积功率和热流密度急剧增加，使得其散热问题已成为制约信息化系统发展的一个关键瓶颈问题。任何电子器件/系统都有其工作温度范围，如果不采取有效散热措施来保证其在合适温度下工作，不仅会大大降低工作效率，严重时还会使设备烧毁。卫星、飞机、雷达、激光器、船舶、计算机、仪器仪表等信息化系统上都集成了大量高功率电子器件，部分电子器件甚至是系统的核心部件，其面临的高热流散热问题将严重制约航空航天、能源动力、生物化工、军工核能及微电子等领域的发展。因此，如何高效、可靠地解决高热流密度电子器件散热问题具有重要意义。NASA和美国空军正在合作研发一种用于激光武器、空间卫星和载人航天器等高热流信息化系统的紧凑型喷雾冷却技术。In addition, with the rapid development of electronic technology and MEMS technology, the performance, miniaturization and integration of information systems have been continuously improved. While the total power of electronic devices has increased significantly, the physical size has become smaller and smaller, resulting in power per unit area and The sharp increase in heat flux has made its heat dissipation problem a key bottleneck restricting the development of information systems. Any electronic device/system has its operating temperature range. If effective heat dissipation measures are not taken to ensure that it works at a suitable temperature, not only will the work efficiency be greatly reduced, but in severe cases, the device will be burned. Satellites, airplanes, radars, lasers, ships, computers, instruments and other information systems are integrated with a large number of high-power electronic devices, some of which are even the core components of the system, and the high heat flow and heat dissipation they face will seriously restrict aerospace , energy power, biochemical industry, military nuclear energy and microelectronics and other fields. Therefore, how to efficiently and reliably solve the heat dissipation problem of high heat flux electronic devices is of great significance. NASA and the U.S. Air Force are cooperating to develop a compact spray cooling technology for high heat flux information systems such as laser weapons, space satellites and manned spacecraft.
传统雾化方法主要有压力雾化、气体雾化和超声雾化等。压力雾化是对液体施加高压，迫使其高速流动，通过喷头实现雾化；气体雾化是在雾化过程中引入高压气体，利用气体对液体的冲击、剪切作用将液体雾化，或者利用气体的高动能将液体击碎；超声雾化是指通过施加超声信号，使雾化器一个或多个部件超声振动，并利用雾化器上的微孔结构打散液体实现雾化。上述三种雾化方法分别属于压力场、速度场和声场单场雾化。Traditional atomization methods mainly include pressure atomization, gas atomization and ultrasonic atomization. Pressure atomization is to apply high pressure to the liquid to force it to flow at a high speed, and to achieve atomization through the nozzle; gas atomization is to introduce high-pressure gas during the atomization process, and use the impact and shear of the gas on the liquid to atomize the liquid, or use The high kinetic energy of the gas crushes the liquid; ultrasonic atomization refers to the application of ultrasonic signals to make one or more parts of the atomizer vibrate ultrasonically, and use the microporous structure on the atomizer to break up the liquid to achieve atomization. The above three atomization methods belong to pressure field, velocity field and sound field single field atomization respectively.
发明内容Contents of the invention
针对现有技术存在的缺陷，本发明提供一种无转子射流喷雾风扇，其是一种声场、压力场和速度场多场协同雾化的无转子射流喷雾风扇。Aiming at the defects in the prior art, the present invention provides a rotorless jet spray fan, which is a rotorless jet spray fan with multi-field cooperative atomization of sound field, pressure field and velocity field.
为实现上述技术目的，本发明的技术方案是：For realizing above-mentioned technical purpose, technical scheme of the present invention is:
一种无转子射流喷雾风扇，包括电源控制系统、射流激励器和供液系统。电源控制系统连接射流激励器，通过电源控制系统输出周期性电压信号驱动射流激励器的振动膜在射流激励器中的两个独立腔体即第一腔体和第二腔体间往复振动，使得射流激励器的两个腔体交替压缩和膨胀，同时还在射流激励器腔体内产生脉动压力场和脉动声场。A rotorless jet spray fan includes a power control system, a jet exciter and a liquid supply system. The power supply control system is connected to the jet actuator, and the vibration film of the jet actuator is driven to reciprocate between the two independent cavities in the jet actuator, namely the first cavity and the second cavity, through the power supply control system outputting periodic voltage signals, so that The two cavities of the jet actuator are alternately compressed and expanded, and at the same time, a pulsating pressure field and a pulsating sound field are also generated in the cavity of the jet actuator.
在射流激励器中的第一腔体对应的第一射流激励器出口通道内设置第一筛网，在射流激励器中的第二腔体对应的第二射流激励器出口通道内设置第二筛网；所述供液系统用于提供喷雾所需液体，供液系统交替向第一射流激励器出口通道和第二射流激励器出口通道注入液体，液体在筛网上离散成小的液膜；其中第一腔体压缩，第二腔体膨胀时，在第一射流激励器出口通道内的高速气体射流穿过第一筛网，使第一筛网上的液膜破碎并夹带在气流里高速喷出，形成射流喷雾；与此同时供液系统向第二射流激励器出口通道内注入液体，液体在第二筛网上离散成小的液膜；第二腔体压缩，第一腔体膨胀时，在第二射流激励器出口通道内的高速气体射流穿过第二筛网，使第二筛网上的液膜破碎并夹带在气流里高速喷出，形成射流喷雾；与此同时供液系统向第一射流激励器出口通道内注入液体，液体在第一筛网上离散成小的液膜；这样在第一腔体对应的第一射流激励器出口通道和第二腔体对应的第二射流激励器出口通道交替喷出射流喷雾。A first screen is set in the outlet channel of the first jet drive corresponding to the first cavity in the jet drive, and a second screen is set in the outlet channel of the second jet drive corresponding to the second cavity in the jet drive Net; the liquid supply system is used to provide the liquid required for spraying, and the liquid supply system alternately injects liquid into the outlet channel of the first jet actuator and the outlet channel of the second jet actuator, and the liquid is dispersed into a small liquid film on the screen; wherein When the first chamber is compressed and the second chamber is expanded, the high-speed gas jet in the outlet channel of the first jet actuator passes through the first screen, breaking the liquid film on the first screen and entraining it in the air flow to be ejected at a high speed , to form a jet spray; at the same time, the liquid supply system injects liquid into the outlet channel of the second jet actuator, and the liquid is dispersed into small liquid films on the second screen; when the second cavity is compressed and the first cavity expands, the The high-speed gas jet in the outlet channel of the second jet actuator passes through the second screen, breaking the liquid film on the second screen and entraining it in the air flow to spray at a high speed, forming a jet spray; at the same time, the liquid supply system sends to the first Liquid is injected into the outlet channel of the jet actuator, and the liquid is dispersed into small liquid films on the first screen; in this way, the outlet channel of the first jet actuator corresponding to the first cavity and the outlet of the second jet actuator corresponding to the second cavity The channels alternately eject jet sprays.
所述射流激励器包括壳体，所述壳体内设有振动膜，振动膜将壳体内的腔体分隔为两个独立的腔体，分别为第一腔体和第二腔体，所述第一腔体上方对应的壳体顶壁上设有第一射流激励器出口通道，第二腔体上方对应的壳体顶壁上设有第二射流激励器出口通道。The jet exciter includes a casing, and a vibrating membrane is arranged in the casing, and the vibrating membrane divides the cavity in the casing into two independent cavities, which are respectively a first cavity and a second cavity, and the second cavity A first jet actuator outlet channel is provided on the corresponding top wall of the housing above the first cavity, and a second jet actuator outlet channel is provided on the corresponding housing top wall above the second cavity.
所述振动膜为压电振动膜，其振动是采用压电驱动方式。所述电源控制系统连接射流激励器，电源控制系统输出周期性(高频)电压信号驱动射流激励器的压电振动膜(高频)往复振动，一方面使得射流激励器的两个腔体(第一腔体和第二腔体)交替压缩和膨胀，另一方面还能在射流激励器腔体内产生脉动压力场(即周期性变化的压力场)和脉动声场(即周期性变化的声场)。The vibrating membrane is a piezoelectric vibrating membrane, and its vibration is driven by piezoelectricity. The power control system is connected to the jet actuator, and the power control system outputs a periodic (high frequency) voltage signal to drive the piezoelectric diaphragm (high frequency) of the jet actuator to vibrate back and forth. On the one hand, the two cavities of the jet actuator ( The first cavity and the second cavity) are alternately compressed and expanded, and on the other hand, a pulsating pressure field (that is, a periodically changing pressure field) and a pulsating sound field (that is, a periodically changing sound field) can be generated in the jet actuator cavity. .
在第一射流激励器出口通道以及第二射流激励器出口通道内垂直于射流方向分别布设有第一筛网以及第二筛网，第一筛网以及第二筛网均上密布有筛孔。筛孔的大小与密度设置须使得筛网上液膜受到的表面极限张力大于其重力，确保液膜能有效附着在筛网上，用于将大液滴离散成小液膜。第一筛网以及第二筛网的安装位置均靠近壳体顶壁的上表面，这样避免雾化液滴吸附在出口通道内壁。In the outlet channel of the first jet actuator and the outlet channel of the second jet actuator, a first screen and a second screen are respectively arranged perpendicular to the jet flow direction, and the first screen and the second screen are densely covered with mesh holes. The size and density of the sieve holes must be set so that the surface limit tension of the liquid film on the sieve is greater than its gravity, so as to ensure that the liquid film can effectively adhere to the sieve, which is used to disperse large droplets into small liquid films. The installation positions of the first screen and the second screen are close to the upper surface of the top wall of the casing, so as to prevent the atomized liquid droplets from being adsorbed on the inner wall of the outlet channel.
所述供液系统用于提供喷雾所需液体，所述射流激励器的壳体上设有供液通道，所述供液通道包括第一供液通道以及第二供液通道。供液系统与第一供液通道以及第二供液通道的入口联通。第一供液通道出口设置在第一射流激励器出口通道的内侧壁上且设在第一射流激励器出口通道中第一筛网的上方；第二供液通道出口设在第二射流激励器出口通道的内侧壁上且设在第二射流激励器出口通道中第二筛网的上方。供液系统通过第一供液通道以及第二供液通道分别为第一射流激励器出口通道以及第二射流激励器出口通道提供液体。The liquid supply system is used to provide the liquid required for spraying, and a liquid supply channel is provided on the casing of the jet actuator, and the liquid supply channel includes a first liquid supply channel and a second liquid supply channel. The liquid supply system communicates with the inlets of the first liquid supply channel and the second liquid supply channel. The outlet of the first liquid supply channel is arranged on the inner side wall of the outlet channel of the first jet actuator and above the first screen in the outlet channel of the first jet actuator; the outlet of the second liquid supply channel is arranged on the second jet actuator The inner side wall of the outlet passage is arranged above the second screen in the outlet passage of the second jet actuator. The liquid supply system supplies liquid to the first jet actuator outlet channel and the second jet actuator outlet channel respectively through the first liquid supply channel and the second liquid supply channel.
具体地，电源控制系统输出周期性电压信号驱动射流激励器的压电振动膜往复振动，使得射流激励器的第一腔体和第二腔体交替压缩和膨胀。当压电振动膜偏向第一腔体而压缩第一腔体时，一方面，第一腔体内的压强增大，第一腔体内的压强高于外界的大气压力，在第一腔体对应的第一射流激励器出口通道内形成高速气体射流穿过第一射流激励器出口通道内的筛网，使筛网上的液膜破碎并夹带在气流里高速喷出，形成射流喷雾。另一方面，外界空气经第二射流激励器出口通道进入第二腔体，第二腔体膨胀，与此同时供液系统通过第二供液通道向第二射流激励器出口通道内注入液体，液体在第二射流激励器出口通道内的筛网上离散成小的液膜并附着在该筛网上。而当压电振动膜偏向第二腔体而压缩第二腔体时，一方面，第二腔体内的压强增大，第二腔体内的压强高于外界的大气压力，在第二腔体对应的第二射流激励器出口通道内形成高速气体射流穿过第二射流激励器出口通道内的筛网，使筛网上的液膜破碎并夹带在气流里高速喷出，形成射流喷雾。另一方面外界空气经第一射流激励器出口通道进入第一腔体，第一腔体膨胀，与此同时供液系统通过第一供液通道向第一射流激励器出口通道内注入液体，液体在第一射流激励器出口通道内的筛网上离散成小的液膜并附着在该筛网上。也就是说，供液系统是交替对第一供液通道、第二供液通道输液的，即第一腔体压缩，第二腔体膨胀时，供液系统通过第二供液通道向第二射流激励器出口通道内注入液体(此时第一供液通道不输液)；第二腔体压缩，第一腔体膨胀时，供液系统通过第一供液通道向第一射流激励器出口通道内注入液体(此时第二供液通道不输液)。Specifically, the power supply control system outputs a periodic voltage signal to drive the piezoelectric diaphragm of the fluidic actuator to reciprocate, so that the first cavity and the second cavity of the fluidic actuator are alternately compressed and expanded. When the piezoelectric vibrating film deflects to the first cavity and compresses the first cavity, on the one hand, the pressure in the first cavity increases, and the pressure in the first cavity is higher than the external atmospheric pressure. A high-speed gas jet is formed in the outlet channel of the first jet actuator to pass through the screen in the outlet channel of the first jet actuator, breaking the liquid film on the screen and being entrained in the air flow and ejected at high speed to form a jet spray. On the other hand, outside air enters the second cavity through the outlet channel of the second jet actuator, and the second cavity expands, and at the same time, the liquid supply system injects liquid into the outlet channel of the second jet actuator through the second liquid supply channel, The liquid breaks up into a small liquid film on the screen in the outlet channel of the second jet actuator and adheres to the screen. When the piezoelectric vibrating film is biased toward the second cavity and compresses the second cavity, on the one hand, the pressure in the second cavity increases, and the pressure in the second cavity is higher than the external atmospheric pressure. A high-speed gas jet is formed in the outlet channel of the second jet actuator to pass through the screen in the outlet channel of the second jet actuator, so that the liquid film on the screen is broken and entrained in the air flow and ejected at high speed to form a jet spray. On the other hand, outside air enters the first cavity through the outlet channel of the first jet actuator, and the first cavity expands. At the same time, the liquid supply system injects liquid into the outlet channel of the first jet actuator through the first liquid supply channel, and the liquid A small liquid film is dispersed on the screen in the outlet channel of the first fluidic actuator and adheres to the screen. That is to say, the liquid supply system infuses liquid to the first liquid supply channel and the second liquid supply channel alternately, that is, when the first cavity is compressed and the second cavity expands, the liquid supply system sends liquid to the second liquid supply channel through the second liquid supply channel. Liquid is injected into the outlet channel of the jet actuator (at this time, the first liquid supply channel does not infuse fluid); when the second cavity is compressed and the first cavity expands, the liquid supply system passes through the first liquid supply channel to the outlet channel of the first jet actuator. Inject the liquid (at this moment, the second liquid supply channel does not infuse liquid).
优选地，第一供液通道靠近第一供液通道出口的一段是设置在第一腔体上方对应的壳体顶壁内的，且壳体顶壁内的第一供液通道是倾斜向下一直延伸通向第一供液通道出口，一般壳体顶壁内的第一供液通道与出口平面的倾斜夹角为15°～30°，借助重力克服通道壁面的粘性阻力，实现连续稳定供液。同样的，第二供液通道靠近第二供液通道出口的一段是设置在第二腔体上方对应的壳体顶壁内的，且壳体顶壁内的第二供液通道是倾斜向下一直延伸通向第二供液通道出口，一般壳体顶壁内的第二供液通道与出口平面的倾斜夹角为15°～30°。Preferably, a section of the first liquid supply channel close to the outlet of the first liquid supply channel is provided in the top wall of the housing above the first cavity, and the first liquid supply channel in the top wall of the housing is inclined downward It extends all the way to the outlet of the first liquid supply channel. Generally, the inclination angle between the first liquid supply channel and the outlet plane in the top wall of the housing is 15°~30°. The viscous resistance of the channel wall is overcome by gravity to achieve continuous and stable supply. liquid. Similarly, a section of the second liquid supply channel close to the outlet of the second liquid supply channel is arranged in the corresponding top wall of the housing above the second cavity, and the second liquid supply channel in the top wall of the housing is inclined downward It extends all the way to the outlet of the second liquid supply channel. Generally, the inclination angle between the second liquid supply channel and the outlet plane in the top wall of the casing is 15°-30°.
优选地，所述供液系统采用电机驱动或者电磁阀控制，其工作电源由电源控制系统提供，电源控制系统输出周期性电压信号，所述电源控制系统连接延时触发器输入端，用于产生驱动供液系统的触发信号，该触发信号是与电源控制系统输出的驱动射流激励器的周期性电压信号同频率且存在一定时间延迟的触发信号，触发信号的延迟时间需要根据驱动信号频率、延时触发器和控制器响应时间来设置。延迟时间的设置标准是：使得第一腔体压缩，第二腔体膨胀时，供液系统通过第二供液通道向第二射流激励器出口通道内输送液体；第二腔体压缩，第一腔体膨胀时，供液系统通过第一供液通道向第一射流激励器出口通道内输送液体。延迟时间的设置具体要根据驱动信号频率、延时触发器和控制器响应时间来确定。所述延时触发器输出端与供液系统相连，控制供液系统按要求向第一供液通道、第二供液通道输出液体。Preferably, the liquid supply system is driven by a motor or controlled by a solenoid valve, its working power is provided by a power control system, and the power control system outputs a periodic voltage signal, and the power control system is connected to the input end of a delay trigger for generating Drive the trigger signal of the liquid supply system. The trigger signal is the same frequency as the periodic voltage signal output by the power supply control system and has a certain time delay. The delay time of the trigger signal needs to be determined according to the frequency of the drive signal, delay time trigger and controller response time to set. The setting standard of the delay time is: when the first cavity is compressed and the second cavity expands, the liquid supply system delivers liquid to the outlet channel of the second jet actuator through the second liquid supply channel; when the second cavity is compressed, the first When the cavity expands, the liquid supply system delivers liquid to the outlet channel of the first jet actuator through the first liquid supply channel. The setting of the delay time should be determined according to the frequency of the driving signal, the delay trigger and the response time of the controller. The output end of the delay trigger is connected to the liquid supply system, and the liquid supply system is controlled to output liquid to the first liquid supply channel and the second liquid supply channel as required.
本发明中：第一射流激励器出口通道和第二射流激励器出口通道均包括一个以上的通孔。通孔的数量、形状以及排列方式不限。In the present invention: both the outlet channel of the first jet actuator and the outlet channel of the second jet actuator include more than one through hole. The number, shape and arrangement of the through holes are not limited.
本发明中：振动膜的材料可以采用弹性材料、柔性材料或者复合材料。振动膜设置在壳体内的腔体中部，振动膜的外缘密封连接在壳体的内壁上。振动膜将壳体内的腔体等分成两个独立的腔体，且两个腔体左右对称。In the present invention: the material of the vibrating membrane can be elastic material, flexible material or composite material. The vibrating membrane is arranged in the middle of the cavity in the housing, and the outer edge of the vibrating membrane is sealed and connected to the inner wall of the housing. The vibrating membrane divides the cavity in the casing into two independent cavities, and the two cavities are left-right symmetrical.
与现有技术相比，本发明能够产生以下技术效果：Compared with the prior art, the present invention can produce the following technical effects:
本发明没有转子和轴承，是一种无转子射流喷雾风扇，利用振动膜产生的声场、压力场和速度场多场协同作用对冷却液进行雾化，具有结构简单、控制方便、耐高温、可靠性高、雾化质量好和喷雾速度快等特点，还兼具射流冲击冷却和喷雾冷却换热能力强的优点，有利于提升雾化质量和换热性能，在加湿、除尘以及高热流密度电子器件散热等领域具有重要应用价值。The present invention has no rotor and bearing, and is a rotorless jet spray fan, which uses the multi-field synergy of the sound field, pressure field and velocity field generated by the vibrating film to atomize the cooling liquid, and has the advantages of simple structure, convenient control, high temperature resistance and reliability It has the characteristics of high performance, good atomization quality and fast spray speed. It also has the advantages of jet impingement cooling and spray cooling heat exchange capacity, which is conducive to improving atomization quality and heat exchange performance. It is used in humidification, dust removal and high heat flux density electronics It has important application value in fields such as device heat dissipation.
附图说明Description of drawings
图1是本发明的结构示意图。Fig. 1 is a structural schematic diagram of the present invention.
图2是一实施例中射流激励器出口通道内筛网和供液通道出口的布置示意图。Fig. 2 is a schematic diagram of the layout of the screen in the outlet channel of the jet actuator and the outlet of the liquid supply channel in one embodiment.
图3是射流激励器出口通道其截面形状示意图。Fig. 3 is a schematic diagram of the cross-sectional shape of the outlet channel of the jet actuator.
图4是射流激励器出口通道中其通孔数量、形状及分布示意图。Fig. 4 is a schematic diagram of the number, shape and distribution of the through holes in the outlet channel of the jet actuator.
图5是射流喷雾风扇工作实验效果图。Fig. 5 is a working experiment effect diagram of the jet spray fan.
图中各标号表示：Each label in the figure means:
1、射流激励器；1.1、壳体；1.2、振动膜；1.3、第一腔体；1.4、第二腔体；1.5、第一射流激励器出口通道；1.6、第二射流激励器出口通道；1.7、第一筛网；1.8、第二筛网；1.9、第一供液通道；1.10、第二供液通道；1. Jet actuator; 1.1, shell; 1.2, vibrating membrane; 1.3, first cavity; 1.4, second cavity; 1.5, outlet channel of first jet actuator; 1.6, outlet channel of second jet actuator; 1.7, the first screen; 1.8, the second screen; 1.9, the first liquid supply channel; 1.10, the second liquid supply channel;
2、电源控制系统；3、供液系统；4、延时触发器。2. Power control system; 3. Liquid supply system; 4. Delay trigger.
具体实施方式Detailed ways
下面结合附图，对本发明的实施方式进行进一步的详细说明。Embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.
一种无转子射流喷雾风扇，包括电源控制系统2、射流激励器1、供液系统3和延时触发器4。A rotorless jet spray fan includes a power supply control system 2, a jet exciter 1, a liquid supply system 3 and a delay trigger 4.
所述射流激励器1包括壳体1.1，所述壳体1.1内设有振动膜1.2.本实施例中振动膜1.2为压电振动膜，其振动是采用压电驱动方式。振动膜1.2将壳体1.1内的腔体分隔为两个独立的腔体，分别为第一腔体1.3和第二腔体1.4，所述第一腔体1.3上方对应的壳体顶壁上设有第一射流激励器出口通道1.5，第二腔体1.4上方对应的壳体顶壁上设有第二射流激励器出口通道1.6。The jet actuator 1 includes a casing 1.1, and the casing 1.1 is provided with a vibrating membrane 1.2. In this embodiment, the vibrating membrane 1.2 is a piezoelectric vibrating membrane, and its vibration is driven by piezoelectricity. The vibrating membrane 1.2 divides the cavity in the housing 1.1 into two independent cavities, respectively the first cavity 1.3 and the second cavity 1.4, and the top wall of the corresponding housing above the first cavity 1.3 is provided with There is a first jet actuator outlet channel 1.5, and a second jet actuator outlet channel 1.6 is provided on the corresponding top wall of the casing above the second cavity 1.4.
本实施例中所述振动膜1.2为压电振动膜，其振动是采用压电驱动方式。所述电源控制系统2连接射流激励器1，电源控制系统2输出周期性高频电压信号驱动射流激励器1的压电振动膜往复振动，一方面使得射流激励器的两个腔体(第一腔体1.3和第二腔体1.4)交替压缩和膨胀，另一方面还能在射流激励器腔体内产生脉动压力场(即周期性变化的压力场)和脉动声场(即周期性变化的声场)。The vibrating membrane 1.2 in this embodiment is a piezoelectric vibrating membrane, and its vibration is driven by piezoelectricity. The power control system 2 is connected to the jet actuator 1, and the power control system 2 outputs periodic high-frequency voltage signals to drive the piezoelectric diaphragm of the jet actuator 1 to vibrate back and forth. On the one hand, the two cavities of the jet actuator (the first The cavity 1.3 and the second cavity 1.4) are alternately compressed and expanded, and on the other hand, a pulsating pressure field (that is, a periodically changing pressure field) and a pulsating sound field (that is, a periodically changing sound field) can also be generated in the cavity of the jet actuator .
在第一射流激励器出口通道1.5以及第二射流激励器出口通道1.6内垂直于射流方向分别布设有筛网，分别设为第一筛网1.7以及第二筛网1.8。筛网均为密布有筛孔的致密型筛网。筛孔的大小与密度设置须使得筛网上液膜受到的表面极限张力大于其重力，确保液膜能有效附着在筛网上，用于将大液滴离散成小液膜。筛网在的安装位置均靠近壳体顶壁的上表面，这样避免雾化液滴吸附在第一射流激励器出口通道内壁以及第二射流激励器出口通道内壁。In the outlet channel 1.5 of the first jet actuator and the outlet channel 1.6 of the second jet actuator, screens are respectively arranged perpendicular to the direction of jet flow, which are respectively referred to as the first screen 1.7 and the second screen 1.8. The sieves are dense sieves densely covered with sieve holes. The size and density of the sieve holes must be set so that the surface limit tension of the liquid film on the sieve is greater than its gravity, so as to ensure that the liquid film can effectively adhere to the sieve, which is used to disperse large droplets into small liquid films. The installation positions of the screens are all close to the upper surface of the top wall of the casing, so as to prevent the atomized liquid droplets from being adsorbed on the inner wall of the outlet channel of the first jet actuator and the inner wall of the outlet channel of the second jet actuator.
所述供液系统3用于提供喷雾所需液体，所述射流激励器1的壳体上设有供液通道，所述供液通道包括第一供液通道1.9以及第二供液通道1.10。供液系统与第一供液通道1.9以及第二供液通道1.10的入口联通，第一供液通道出口设置在第一射流激励器出口通道1.5的内侧壁上且设在第一射流激励器出口通道1.5中第一筛网1.7的上方；第二供液通道出口设在第二射流激励器出口通道1.6的内侧壁上且设在第二射流激励器出口通道1.6中第二筛网1.8的上方。供液系统3通过第一供液通道1.9以及第二供液通道1.10分别为第一射流激励器出口通道1.5以及第二射流激励器出口通道1.6提供液体。The liquid supply system 3 is used to provide the liquid required for spraying. The casing of the jet actuator 1 is provided with a liquid supply channel, and the liquid supply channel includes a first liquid supply channel 1.9 and a second liquid supply channel 1.10. The liquid supply system communicates with the inlets of the first liquid supply channel 1.9 and the second liquid supply channel 1.10, and the outlet of the first liquid supply channel is set on the inner wall of the first jet actuator outlet channel 1.5 and is arranged at the outlet of the first jet actuator Above the first screen 1.7 in channel 1.5; the outlet of the second liquid supply channel is set on the inner side wall of the second jet actuator outlet channel 1.6 and above the second screen 1.8 in the second jet actuator outlet channel 1.6 . The liquid supply system 3 supplies liquid to the first jet actuator outlet channel 1.5 and the second jet actuator outlet channel 1.6 through the first liquid supply channel 1.9 and the second liquid supply channel 1.10, respectively.
参照图1，本实施例中，第一供液通道1.9靠近第一供液通道出口的一段是设置在第一腔体1.3上方对应的壳体顶壁内的，且壳体顶壁内的第一供液通道1.9是倾斜向下一直延伸通向第一供液通道出口，一般壳体顶壁内的第一供液通道1.19与出口平面的倾斜夹角为15°～30°，借助重力克服通道壁面的粘性阻力，实现连续稳定供液。同样的，第二供液通道1.10靠近第二供液通道出口的一段是设置在第二腔体1.4上方对应的壳体顶壁内的，且壳体顶壁内的第二供液通道1.10是倾斜向下一直延伸通向第二供液通道出口，一般壳体顶壁内的第二供液通道1.10与出口平面的倾斜夹角为15°～30°，借助重力克服通道壁面的粘性阻力，实现连续稳定供液。Referring to Fig. 1, in this embodiment, a section of the first liquid supply channel 1.9 close to the outlet of the first liquid supply channel is set in the top wall of the housing corresponding to the top of the first cavity 1.3, and the first liquid supply channel in the top wall of the housing A liquid supply channel 1.9 extends obliquely downward and leads to the outlet of the first liquid supply channel. Generally, the angle between the first liquid supply channel 1.19 in the top wall of the housing and the outlet plane is 15°-30°, which can be overcome by gravity. The viscous resistance of the channel wall realizes continuous and stable liquid supply. Similarly, a section of the second liquid supply channel 1.10 close to the outlet of the second liquid supply channel is provided in the corresponding top wall of the housing above the second cavity 1.4, and the second liquid supply channel 1.10 in the top wall of the housing is It extends downwards and leads to the outlet of the second liquid supply channel. Generally, the angle between the second liquid supply channel 1.10 in the top wall of the housing and the outlet plane is 15°-30°. The viscous resistance of the channel wall is overcome by gravity. Achieve continuous and stable liquid supply.
电源控制系统2输出周期性电压信号驱动射流激励器的压电振动膜往复振动，使得射流激励器的第一腔体1.3和第二腔体1.4交替压缩和膨胀。当压电振动膜偏向第一腔体1.3而压缩第一腔体1.3时，一方面，第一腔体1.3内的压强增大，第一腔体1.3内的压强高于外界的大气压力，在第一腔体1.3对应的第一射流激励器出口通道1.5内形成高速气体射流穿过第一射流激励器出口通道1.5内的第一筛网1.7，使第一筛网1.7上的液膜破碎并夹带在气流里高速喷出，形成射流喷雾。另一方面，外界空气经第二射流激励器出口通道1.6进入第二腔体1.4，第二腔体1.4膨胀，与此同时供液系统3通过第二供液通道1.10向第二射流激励器出口通道1.6内注入液体，液体在第二射流激励器出口通道1.6内的第二筛网1.8上离散成小的液膜并附着在第二筛网1.8上。反之，而当压电振动膜偏向第二腔体1.4而压缩第二腔体1.4时，一方面，第二腔体1.4内的压强增大，第二腔体1.4内的压强高于外界的大气压力，在第二腔体1.4对应的第二射流激励器出口通道1.6内形成高速气体射流穿过第二射流激励器出口通道1.6内的第二筛网1.8，使第二筛网1.8上的液膜破碎并夹带在气流里高速喷出，形成射流喷雾。另一方面外界空气经第一射流激励器出口通道1.5进入第一腔体1.3，第一腔体1.3膨胀，与此同时供液系统3通过第一供液通道1.19向第一射流激励器出口通道1.5内注入液体，液体在第一射流激励器出口通道1.5内的第一筛网1.7上离散成小的液膜并附着在第一筛网1.7上。也就是说，供液系统是交替对第一供液通道、第二供液通道输液的，即第一腔体压缩，第二腔体膨胀时，供液系统通过第二供液通道向第二射流激励器出口通道内注入液体(此时第一供液通道不输液)；第二腔体压缩，第一腔体膨胀时，供液系统通过第一供液通道向第一射流激励器出口通道内注入液体(此时第二供液通道不输液)。The power supply control system 2 outputs periodic voltage signals to drive the piezoelectric diaphragm of the fluidic actuator to vibrate back and forth, so that the first cavity 1.3 and the second cavity 1.4 of the fluidic actuator are compressed and expanded alternately. When the piezoelectric vibrating film deflects to the first cavity 1.3 and compresses the first cavity 1.3, on the one hand, the pressure in the first cavity 1.3 increases, and the pressure in the first cavity 1.3 is higher than the external atmospheric pressure. The first jet actuator outlet channel 1.5 corresponding to the first cavity 1.3 forms a high-speed gas jet through the first screen 1.7 in the first jet actuator outlet channel 1.5, breaking the liquid film on the first screen 1.7 and It is entrained in the air flow and ejected at high speed to form a jet spray. On the other hand, outside air enters the second cavity 1.4 through the outlet channel 1.6 of the second jet actuator, and the second cavity 1.4 expands. At the same time, the liquid supply system 3 exits the second jet actuator through the second fluid supply channel 1.10. Liquid is injected into the channel 1.6, and the liquid is dispersed into small liquid films on the second screen 1.8 in the outlet channel 1.6 of the second jet actuator and adheres to the second screen 1.8. Conversely, when the piezoelectric vibrating film is biased toward the second cavity 1.4 and compresses the second cavity 1.4, on the one hand, the pressure in the second cavity 1.4 increases, and the pressure in the second cavity 1.4 is higher than the outside atmosphere pressure, a high-speed gas jet is formed in the second jet actuator outlet channel 1.6 corresponding to the second cavity 1.4 to pass through the second screen 1.8 in the second jet actuator outlet channel 1.6, so that the liquid on the second screen 1.8 The film is broken and entrained in the airflow and ejected at high speed to form a jet spray. On the other hand, outside air enters the first cavity 1.3 through the outlet channel 1.5 of the first jet actuator, and the first cavity 1.3 expands. At the same time, the liquid supply system 3 flows to the outlet channel of the first jet actuator through the first fluid supply channel 1.19. Liquid is injected into 1.5, and the liquid is dispersed into small liquid films on the first screen 1.7 in the outlet channel 1.5 of the first jet actuator and adheres to the first screen 1.7. That is to say, the liquid supply system infuses liquid to the first liquid supply channel and the second liquid supply channel alternately, that is, when the first cavity is compressed and the second cavity expands, the liquid supply system sends liquid to the second liquid supply channel through the second liquid supply channel. Liquid is injected into the outlet channel of the jet actuator (at this time, the first liquid supply channel does not infuse fluid); when the second cavity is compressed and the first cavity expands, the liquid supply system passes through the first liquid supply channel to the outlet channel of the first jet actuator. Inject the liquid (at this moment, the second liquid supply channel does not infuse liquid).
所述供液系统3采用电机驱动或者电磁阀控制，其工作电源由电源控制系统2提供，电源控制系统2输出周期性电压信号，所述电源控制系统2连接延时触发器4输入端，延时触发器4用于产生驱动供液系统3的触发信号，该触发信号是与电源控制系统输出的驱动射流激励器的周期性电压信号同频率且存在一定时间延迟的触发信号。该触发信号的延迟时间需要根据驱动信号频率、延时触发器和控制器响应时间来设置。延迟时间的设置标准是：使得第一腔体1.3压缩，第二腔体1.4膨胀时，供液系统3通过第二供液通道1.10向第二射流激励器出口通道1.16内输送液体；第二腔体1.4压缩，第一腔体1.3膨胀时，供液系统3通过第一供液通道1.19向第一射流激励器出口通道1.15内输送液体。延迟时间的设置具体要根据驱动信号频率、延时触发器和控制器响应时间来确定。所述延时触发器4的输出端与供液系统3相连，控制供液系统3按要求向第一供液通道1.19、第二供液通道1.10输出液体。The liquid supply system 3 is driven by a motor or controlled by a solenoid valve, its working power is provided by the power control system 2, and the power control system 2 outputs a periodic voltage signal, and the power control system 2 is connected to the input terminal of the delay trigger 4. The timing trigger 4 is used to generate a trigger signal for driving the liquid supply system 3, and the trigger signal is a trigger signal with the same frequency as the periodic voltage signal output by the power control system for driving the jet actuator and with a certain time delay. The delay time of the trigger signal needs to be set according to the frequency of the driving signal, the delay trigger and the response time of the controller. The setting standard of the delay time is: when the first cavity 1.3 is compressed and the second cavity 1.4 expands, the liquid supply system 3 delivers liquid to the second jet actuator outlet channel 1.16 through the second liquid supply channel 1.10; the second cavity When the body 1.4 is compressed and the first cavity 1.3 expands, the liquid supply system 3 delivers liquid to the outlet channel 1.15 of the first jet actuator through the first liquid supply channel 1.19. The setting of the delay time should be determined according to the frequency of the driving signal, the delay trigger and the response time of the controller. The output end of the delay trigger 4 is connected to the liquid supply system 3 to control the liquid supply system 3 to output liquid to the first liquid supply channel 1.19 and the second liquid supply channel 1.10 as required.
本发明中：第一射流激励器出口通道1.15和第二射流激励器出口通道1.16均包括一个以上的通孔。通孔的数量、形状以及排列方式不限。参照图3，射流激励器出口通道其截面形状示意图。当第一射流激励器出口通道1.15以及第二射流激励器出口通道1.16均只包括一个通孔时，该通孔的截面形状不限，可以是圆形、椭圆形、三角形、矩形、环形或者其它任意形状。In the present invention: the outlet channel 1.15 of the first jet actuator and the outlet channel 1.16 of the second jet actuator both include more than one through hole. The number, shape and arrangement of the through holes are not limited. Referring to FIG. 3 , it is a schematic diagram of the cross-sectional shape of the outlet channel of the jet actuator. When the outlet channel 1.15 of the first jet actuator and the outlet channel 1.16 of the second jet actuator only include one through hole, the cross-sectional shape of the through hole is not limited, and can be circular, elliptical, triangular, rectangular, annular or other any shape.
参照图4，是射流激励器出口通道中其通孔数量、形状及分布示意图。当第一射流激励器出口通道1.5以及第二射流激励器出口通道1.6均包括多个通孔时，各通孔的截面形状不限，通孔的数量不限，多个通孔间的分布方式不限，通孔数量可以是2个、3个或者其他数量，多个通孔根据使用需要可以采用不同形状阵列布置。Referring to Fig. 4, it is a schematic diagram of the number, shape and distribution of the through holes in the outlet channel of the jet actuator. When the outlet channel 1.5 of the first jet actuator and the outlet channel 1.6 of the second jet actuator both include a plurality of through holes, the cross-sectional shape of each through hole is not limited, the number of the through holes is not limited, and the distribution mode among the plurality of through holes It is not limited, the number of through holes may be 2, 3 or other numbers, and multiple through holes may be arranged in arrays of different shapes according to usage requirements.
本发明中：振动膜1.2的材料可以采用弹性材料、柔性材料或者复合材料。振动膜1.2设置在壳体1.1内的腔体中部，振动膜1.2的外缘密封连接在壳体的内壁上，如振动膜1.2其外缘套装有橡胶密封圈后安装在壳体内，与壳体的内壁直接因为有橡胶密封圈，因此密封效果好。振动膜1.2将壳体内的腔体等分成两个独立的腔体即第一腔体和第二腔体，且两个腔体左右对称。In the present invention: the material of the vibrating membrane 1.2 can be elastic material, flexible material or composite material. The vibrating membrane 1.2 is set in the middle of the cavity in the housing 1.1, and the outer edge of the vibrating membrane 1.2 is sealed and connected to the inner wall of the housing. The inner wall is directly because of the rubber sealing ring, so the sealing effect is good. The vibrating membrane 1.2 divides the cavity in the casing into two independent cavities, ie, the first cavity and the second cavity, and the two cavities are left-right symmetrical.
结合射流喷雾实验对本发明进行说明。实验中采用高速摄影对射流喷雾风扇工作过程进行记录，如图5所示，其清楚地显示了该装置可以产生明显的高速射流喷雾。The present invention is described in conjunction with the jet spray experiment. In the experiment, high-speed photography was used to record the working process of the jet spray fan, as shown in Figure 5, which clearly shows that the device can produce obvious high-speed jet spray.
以上所述仅为本发明的优选的实施例而已，并不用于限制本发明，对于本领域的技术人员来说，本发明可以有各种更改和变化。凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.
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