CN103143462B - A kind of fluidic generator - Google Patents

Abstract

A jet generator relates to a jet generator. A jet generator with light weight, small size, simple structure and convenient operation and control is provided. It is equipped with insulating dielectric tube, needle electrode, ring electrode and high-voltage AC power supply; the insulating dielectric tube is provided with a central through hole, the needle electrode is inserted in the central through hole of the insulating dielectric tube, the ring electrode is wound on the outer wall of the front end of the insulating dielectric tube, and the needle An axial distance is provided between the electrode and the ring electrode, and the needle electrode and the ring electrode are respectively electrically connected to two output ends of the high-voltage AC power supply. Using atmospheric pressure AC discharge to generate jet flow, no external air source and air compressor, blower, filter device and other air source equipment are required. When in use, install it near the part where the jet is needed or hold it in hand, so that the outlet jet can be sprayed at the required local position.

Description

a jet generator

technical field

The invention relates to a jet generator. In particular, it relates to a jet generator for generating jets by atmospheric pressure AC discharge.

Background technique

The high-speed gas jet can quickly clean and remove dust from the surface of the object. For example, after the electronic components are packaged, they are usually arranged in trays to facilitate future transportation and assembly. However, the polluting dust particles in the air will adhere to the components in the tray during storage and transportation, causing deterioration of the operating characteristics of the electronic components, and even damage to the components. Therefore, the components must be cleaned before assembly to ensure assembly subsequent product quality.

At present, many cleaning methods still use air compressors to generate high-pressure gas jets for cleaning. For this purpose, air compressors or blowers, control systems, filtering devices, connecting pipelines, nozzles and other equipment are required. The system design is complicated and the power consumption is high. The main disadvantage is that the energy of the air flow used for cleaning is not concentrated, which consumes a lot of energy, but some local small parts, such as corners or crevices, cannot be cleaned; and the gas comes from the outside air, resulting in The air jet will inevitably contain pollutant particles, which will cause secondary pollution to components during the cleaning process.

The Chinese patent application with the publication number CN101987271A discloses a dust removal device and a dust removal system, which can shorten the time for removing foreign matter in the dust removal device and its piping built into the clean room by blowing after assembly. A filter box with a HEPA filter inside is attached to the pressurized gas inlet side of the cleaning head casing to form a unit.

The Chinese utility model patent application with the notification number CN201676850U provides an automatic spraying and dust removal system, which includes an air supply device, a dust removal chamber, and a discharge device. The air supply device includes an interconnected air supply box and an air supply pressure equalization box. A fresh air inlet is provided on the air supply equalizing box, and a high-efficiency filter is arranged inside the air supply equalizing box, the dust removal chamber is connected with the air supply equalizing box, and a non-planar water curtain door is arranged on its side, so The water curtain door is provided with a plurality of V-shaped troughs, and the water curtain door is provided with a water pump and a water retaining plate, and one side of the water curtain door is provided with a retaining wall, and the discharge device is communicated with the dust removal room. In addition, it includes an exhaust device and a drain pipe, and the exhaust device includes an exhaust pipe and a scroll former. The above-mentioned automatic spraying dust removal system not only has a good dust removal effect, but is not easy to form gas rebound; and has a simple structure and is easy to implement.

The Chinese utility model patent with the notification number CN201776248U provides an automatic air blowing and dust removal device, which includes a compressed air nozzle connected to a compressed air source. The automatic air blowing and dust removal device also includes: rotating at least one workpiece to facilitate dust blowing and dust removal The workpiece rotating device; the nozzle transmission device that drives the compressed air nozzle to move back and forth on the workpiece to perform dust blowing and dust removal operations. The beneficial effects of adopting this technical solution are: the workpiece rotating device is used to rotate the workpiece, and the nozzle driving device drives the compressed air nozzle to move back and forth to blow air and remove dust on the workpiece, and can automatically blow dust and remove dust for one or more workpieces at the same time, greatly improving It improves work efficiency and reduces labor intensity. At the same time, it adopts a mechanical workpiece rotating device to prevent accidental damage to precision workpieces caused by human factors.

Contents of the invention

The object of the present invention is to provide a jet generator with light weight, small volume, simple structure, and easy operation and control. Devices and other gas source equipment.

The invention is provided with an insulating dielectric tube, a needle electrode, a ring electrode and a high-voltage AC power supply;

The insulating dielectric tube is provided with a central through hole, the needle electrode is inserted into the central through hole of the insulating dielectric tube, the ring electrode is wound on the outer wall of the front end of the insulating dielectric tube, an axial distance is set between the needle electrode and the ring electrode, the needle electrode and the ring electrode are The electrodes are respectively electrically connected to the two output ends of the high-voltage AC power supply.

The insulating dielectric tube is preferably a round tube with an inner diameter of 0.5-1 mm, a tube wall thickness of ≥0.5 mm, and a length of ≥20 mm.

The insulating dielectric tube can be a quartz glass tube or a ceramic tube, preferably a quartz glass tube.

The needle electrodes can be copper wire needle electrodes or silver wire needle electrodes; the ring electrodes can be strip-shaped copper foil ring electrodes or copper wire bundled ring electrodes. The needle electrode is preferably a copper wire needle electrode, and the diameter of the copper wire needle electrode can be 0.3mm; the ring electrode is preferably a strip-shaped copper foil ring electrode, and the size of the strip-shaped copper foil can be 0.02mm in thickness and 5mm in width The copper wire binding ring electrode is preferably a copper wire binding ring electrode with a diameter of ≤1 mm and a winding number of turns ≥3. The axial distance between the needle electrode and the ring electrode is preferably not less than 5 mm, and not greater than the length of the insulating dielectric tube.

The output voltage of the AC power supply is 5-30kV, the frequency is 1-20kHz, the pulse modulation frequency is 10-1000Hz, and the pulse modulation duty ratio is 50%-99%. The high-voltage AC power supply can be commercially available or customized.

Compared with prior art, working principle of the present invention and beneficial effect are as follows:

The invention is a device for generating jet flow by alternating current corona discharge at atmospheric pressure. When a high-voltage alternating current is applied between the needle electrode and the ring electrode, a discharge occurs between the needle electrode and the ring electrode, and a high-speed jet is generated at the nozzle at the ring electrode. The jet has a wide range of applications, especially in local small-scale applications, such as cleaning electronic components, dust removal on the surface of precision mechanical parts, local cooling, flow control, etc.

The outstanding advantages of the present invention are: (1) the jet energy formed is very concentrated, the divergence is small, and the flow velocity is high, which is easy to form an impact; (2) there is no need to add mechanical components such as an air source, a compressor, and a pipeline; (3) The structure is simple, the volume is small, light, easy to manufacture, and can be used by hand; (4) The jet intensity can be easily changed through electrical parameters. When the jet intensity needs to be changed, only the output voltage, frequency and modulation frequency of the loading power supply need to be changed. Or modulate the duty cycle; (5) The requirements for the jet range can be met by arranging multiple generators.

When in use, the present invention can be installed near the position where the jet is required or held in hand, and the outlet jet can be aimed at the required local position for spraying.

Description of drawings

FIG. 1 is a schematic structural diagram of Embodiment 1 of the present invention.

Fig. 2 is a schematic structural diagram of Embodiment 2 of the present invention.

Detailed ways

Example 1

Referring to Fig. 1, the present invention is provided with a circular tube 1 (insulated dielectric tube), a needle electrode 2, a ring electrode 3 (a strip-shaped copper foil ring electrode) and a high-voltage AC power supply. The material of the circular tube 1 is quartz glass. The circular tube 1 has an inner diameter of 1 mm, a tube wall thickness of 1 mm, and a length of 30 mm. The needle electrode 2 is inserted from the rear end of one end 1 of the round tube, and the ring electrode 3 is wound on the outer wall of the front end of the round tube 1 . The needle electrode 2 is a copper wire needle electrode made of copper wire with a diameter of 0.3 mm. The ring electrode 3 is a strip-shaped copper foil ring electrode made of copper foil with a thickness of 0.02 mm and a width of 5 mm. The axial distance between the needle electrode 2 and the ring electrode 3 is 10mm, and the needle electrode 2 and the ring electrode 3 are respectively electrically connected to two output ends of the high-voltage AC power supply.

The output voltage V of the AC power supply is 5-30kV, the frequency is 1-20kHz, the pulse modulation frequency is 10-1000Hz, and the pulse modulation duty cycle is 50%-99%. The high-voltage AC power supply can be commercially available or customized.

When the circuit is connected, an AC discharge under atmospheric pressure occurs between the needle electrode 2 and the ring electrode 3, generating a high-speed impact jet Q along the axis of the circular tube 1, and the jet speed can reach tens of meters per second.

The jet flow generator of the present invention can work under atmospheric pressure, without additional air source, air compressor, blower, and filtering device.

Example 2

Referring to FIG. 2 , it is similar to Embodiment 1, except that the ring electrode 3 ′ is made of 3 turns of copper wire with a diameter of 0.3 mm to bind the ring electrode.

Claims (8)

1. a fluidic generator, is characterized in that being provided with insulation dielectric pipe, pin electrode, ring electrode and high-voltage ac power;

Insulation dielectric pipe is provided with central through hole, pin electrode inserts in the central through hole of insulation dielectric pipe, ring electrode is wrapped on the outer wall of insulation dielectric pipe front end, is provided with axial spacing between pin electrode and ring electrode, and pin electrode and ring electrode are electrically connected with two outputs of high-voltage ac power respectively;

Described pin electrode is copper wire pin electrode or filamentary silver pin electrode, and described ring electrode is banded Copper Foil ring electrode or copper wire binding ring electrode;

Described fluidic generator utilizes atmospheric pressure alternating current discharge to produce jet, does not need out-source gas.

2. a kind of fluidic generator as claimed in claim 1, is characterized in that described insulation dielectric pipe is pipe.

3. a kind of fluidic generator as claimed in claim 2, is characterized in that the internal diameter of described pipe is 0.5 ~ 1mm, thickness of pipe wall >=0.5mm, length >=20mm.

4. a kind of fluidic generator as claimed in claim 1 or 2, is characterized in that insulation dielectric pipe is quartz glass tube or earthenware.

5. a kind of fluidic generator as claimed in claim 1, it is characterized in that described pin electrode is copper wire pin electrode, copper wire pin electrode diameter is 0.3mm; Described ring electrode is banded Copper Foil ring electrode, banded copper thickness 0.02mm, width 5mm.

6. a kind of fluidic generator as claimed in claim 1, it is characterized in that described pin electrode is copper wire pin electrode, copper wire pin electrode diameter is 0.3mm; Described copper wire binding ring electrode is diameter≤1mm, is wound around the copper wire binding ring electrode of the number of turn >=3.

7. a kind of fluidic generator as claimed in claim 1, is characterized in that the axial spacing between described pin electrode and ring electrode is not less than 5mm, is not more than insulation dielectric length of tube.

8. a kind of fluidic generator as claimed in claim 1, it is characterized in that the output voltage of described AC power is 5 ~ 30kV, frequency is 1 ~ 20kHz, and pulse modulation frequency is 10 ~ 1000Hz, and impulse modulation dutycycle is 50% ~ 99%.