CN111946513A - Piezoelectric type single-droplet generator device with adjustable length-diameter ratio of nozzle - Google Patents
Piezoelectric type single-droplet generator device with adjustable length-diameter ratio of nozzle Download PDFInfo
- Publication number
- CN111946513A CN111946513A CN202010786278.1A CN202010786278A CN111946513A CN 111946513 A CN111946513 A CN 111946513A CN 202010786278 A CN202010786278 A CN 202010786278A CN 111946513 A CN111946513 A CN 111946513A
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- China
- Prior art keywords
- nozzle
- diameter
- oil
- droplet generator
- stainless steel
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
- F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
- F02M61/1806—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for characterised by the arrangement of discharge orifices, e.g. orientation or size
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M51/00—Fuel-injection apparatus characterised by being operated electrically
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
- F02M61/165—Filtering elements specially adapted in fuel inlets to injector
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Special Spraying Apparatus (AREA)
Abstract
The invention aims to provide a piezoelectric type single-droplet generator device with an adjustable nozzle length-diameter ratio, which comprises a stainless steel cavity, a voltage signal emitter and an oil tank, wherein a metal sheet and piezoelectric ceramics are arranged at the upper end of the stainless steel cavity, the voltage signal emitter is connected with the metal sheet and the piezoelectric ceramics through an electric wire, a liquid storage cavity is arranged in the stainless steel cavity, a nozzle is connected below the liquid storage cavity, the oil tank is connected with an oil pipe, the oil pipe is connected with the liquid storage cavity through an interface, and an oil pump is arranged on the oil pipe. The invention can control the diameter of the liquid drop from multiple aspects, including voltage amplitude and driving frequency control, filter membrane aperture control, and adjustable length-diameter ratio nozzle selection control. The nozzle part can be detached and replaced, and is flexible and simple.
Description
Technical Field
The invention relates to a combustion research device of an internal combustion engine, in particular to a single liquid drop generator device.
Background
In recent years, with the development of internal combustion engines in China, the internal combustion engines are researched more and more deeply. Researchers have found that the addition of fine particles to liquid fuels can reduce ignition delay of the fuel, enhance oxidation of the fuel, release more energy, and improve combustion efficiency. The research on the burning of single droplets is limited by the limitations of single droplet generators and progresses slowly. In order to research the combustion of single liquid drops of an internal combustion engine, a piezoelectric single liquid drop generator device with an adjustable nozzle length-diameter ratio needs to be designed to uniformly generate liquid drops with consistent diameters. Common drop generators are classified into continuous drop ejection and drop-on-demand ejection. Continuous liquid ejection can continuously produce a large number of droplets in a short time, but the droplet diameter uniformity is poor. Drop-on-demand jetting can be classified into thermal bubble, pneumatic, mechanical, piezoelectric, and electromagnetic actuation based on different generation principles. The piezoelectric single-drop generator can realize continuous and demand spraying of micro-drops, spraying of low-viscosity solution and metal solution, and fixed-point and quantitative spraying of the drops by controlling periodic change of the piezoelectric material. The aspect ratio of the nozzle (the ratio of the orifice depth to the diameter) directly affects the size of the drop diameter produced. In order to meet the requirement that the diameters of generated liquid drops are different, a piezoelectric type single-liquid-drop generator device with an adjustable length-diameter ratio of a nozzle is designed.
Disclosure of Invention
The invention aims to provide a piezoelectric type single-droplet generator device with adjustable length-diameter ratio of nozzles, which can make generated droplets have different diameters.
The purpose of the invention is realized as follows:
the invention relates to a piezoelectric type single-droplet generator device with an adjustable nozzle length-diameter ratio, which is characterized in that: including stainless steel cavity, voltage signal transmitter, oil tank, stainless steel cavity upper end sets up sheetmetal and piezoceramics, and voltage signal transmitter passes through electric wire connection sheetmetal and piezoceramics, sets up the stock solution chamber in the stainless steel cavity, and the nozzle is connected to stock solution chamber below, and oil pipe is connected to the oil tank, and oil pipe passes through the interface connection stock solution chamber, installs the oil pump on the oil pipe.
The present invention may further comprise:
1. the nozzle comprises a variable-diameter nozzle and a fixed nozzle, an inner thread is arranged on the inner wall of the fixed nozzle, an outer thread is arranged on the outer wall of the variable-diameter nozzle, the variable-diameter nozzle is matched with the inner thread of the fixed nozzle through the outer thread of the variable-diameter nozzle, and the whole length of the nozzle is adjusted through the screwing distance between the outer thread and the inner thread.
2. A filtering membrane is arranged above the nozzle, and oil drops in the liquid storage cavity are primarily filtered through the filtering membrane before entering the nozzle.
3. The interface is located at 1/3 on the reservoir.
The invention has the advantages that: the invention can control the diameter of the liquid drop from multiple aspects, including voltage amplitude and driving frequency control, filter membrane aperture control, and adjustable length-diameter ratio nozzle selection control. The nozzle part can be detached and replaced, and is flexible and simple.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of a nozzle of the present invention.
Detailed Description
The invention will now be described in more detail by way of example with reference to the accompanying drawings in which:
referring to fig. 1-2, fig. 1 is a front view of a piezoelectric type single droplet generator device with adjustable nozzle length-diameter ratio according to the present invention, which includes a voltage signal emitter 1, an electric wire 2, a metal sheet 3, a support 4, a piezoelectric ceramic 5, a liquid storage cavity 6, a stainless steel cavity 7, a filter membrane 8, a nozzle 9, a connector 10, an oil pipe 11, an oil pump 12, and an oil tank 13. The voltage signal emitter 1 is connected with the metal sheet 3 and the piezoelectric ceramic 5 through the electric wire 2, the voltage signal emitter 1 emits signals such as voltage amplitude, driving frequency and the like, the piezoelectric ceramic 5 and the metal sheet 3 are controlled to vibrate, and the vibration drives a pressure part in the liquid storage cavity 6. The bracket 4 is responsible for fixing the entire single droplet generator device. The oil pump 12 works to inject the oil in the oil tank 13 into the liquid storage cavity 6 through the oil pipe 11, and the oil pipe 11 is connected with the stainless steel cavity 7 through the interface 10. Oil drops in the liquid storage cavity 6 are firstly subjected to primary filtration through the filter membrane 8 and then are partially sprayed through the nozzle 9.
As shown in FIG. 2, the nozzle 9 of a piezoelectric type single drop generator device with adjustable nozzle length-diameter ratio is composed of a fixed nozzle 15 and a variable diameter nozzle 16. The variable diameter nozzle 16 is connected with the fixed nozzle 15 through the thread 14, and the overall length of the nozzle 9 is controlled through the length of the thread 14, so that the length-diameter ratio can be adjusted.
Oil drops in the liquid storage cavity of the device are firstly subjected to primary filtration through the filtering membrane, and the aperture of the filtering membrane is selected along with the size of the diameter of the oil drops required. The oil pipe is connected to the liquid storage cavity at 1/3. The bracket fixing device should be an insulating material.
In the working process, the diameter of the liquid drop generated at last by spraying is subjected to safety control in multiple aspects, a voltage signal emitter transmits signals such as voltage amplitude, driving frequency and the like, and piezoelectric ceramics and a metal sheet are controlled to vibrate to drive the pressure in a liquid storage cavity to change; then the aperture of the filtering membrane in the liquid storage cavity is controlled; finally, the length-diameter ratio of the nozzle is adjusted. The device overcomes the single current situation that the diameter of a single liquid drop generator device is required to depend on voltage amplitude and driving frequency, is flexible and simple, and meets the requirements of various diameters of liquid drops.
Claims (5)
1. The utility model provides an adjustable nozzle draw ratio's piezoelectric type single drop generator device which characterized by: including stainless steel cavity, voltage signal transmitter, oil tank, stainless steel cavity upper end sets up sheetmetal and piezoceramics, and voltage signal transmitter passes through electric wire connection sheetmetal and piezoceramics, sets up the stock solution chamber in the stainless steel cavity, and the nozzle is connected to stock solution chamber below, and oil pipe is connected to the oil tank, and oil pipe passes through the interface connection stock solution chamber, installs the oil pump on the oil pipe.
2. The piezoelectric droplet generator with adjustable nozzle aspect ratio of claim 1, wherein: the nozzle comprises a variable-diameter nozzle and a fixed nozzle, an inner thread is arranged on the inner wall of the fixed nozzle, an outer thread is arranged on the outer wall of the variable-diameter nozzle, the variable-diameter nozzle is matched with the inner thread of the fixed nozzle through the outer thread of the variable-diameter nozzle, and the whole length of the nozzle is adjusted through the screwing distance between the outer thread and the inner thread.
3. The piezoelectric droplet generator with adjustable nozzle length-diameter ratio of claim 1 or 2, wherein: a filtering membrane is arranged above the nozzle, and oil drops in the liquid storage cavity are primarily filtered through the filtering membrane before entering the nozzle.
4. The piezoelectric droplet generator with adjustable nozzle length-diameter ratio of claim 1 or 2, wherein: the interface is located at 1/3 on the reservoir.
5. The piezoelectric droplet generator with adjustable nozzle aspect ratio of claim 3, wherein: the interface is located at 1/3 on the reservoir.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010786278.1A CN111946513A (en) | 2020-08-07 | 2020-08-07 | Piezoelectric type single-droplet generator device with adjustable length-diameter ratio of nozzle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010786278.1A CN111946513A (en) | 2020-08-07 | 2020-08-07 | Piezoelectric type single-droplet generator device with adjustable length-diameter ratio of nozzle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111946513A true CN111946513A (en) | 2020-11-17 |
Family
ID=73332976
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010786278.1A Pending CN111946513A (en) | 2020-08-07 | 2020-08-07 | Piezoelectric type single-droplet generator device with adjustable length-diameter ratio of nozzle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111946513A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103434272A (en) * | 2013-08-23 | 2013-12-11 | 浙江大学 | Piezoelectric type jet nozzle device for micro-droplet generation |
| CN205869680U (en) * | 2016-07-01 | 2017-01-11 | 常州机电职业技术学院 | Nozzle of adjustable length |
| CN108684516A (en) * | 2018-04-25 | 2018-10-23 | 江苏大学 | A kind of optimal mist droplet particle size spectrum of mist training is test bed |
| CN210058732U (en) * | 2019-05-17 | 2020-02-14 | 苏州研创自动化设备有限公司 | Extension nozzle for injection valve |
-
2020
- 2020-08-07 CN CN202010786278.1A patent/CN111946513A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103434272A (en) * | 2013-08-23 | 2013-12-11 | 浙江大学 | Piezoelectric type jet nozzle device for micro-droplet generation |
| CN205869680U (en) * | 2016-07-01 | 2017-01-11 | 常州机电职业技术学院 | Nozzle of adjustable length |
| CN108684516A (en) * | 2018-04-25 | 2018-10-23 | 江苏大学 | A kind of optimal mist droplet particle size spectrum of mist training is test bed |
| CN210058732U (en) * | 2019-05-17 | 2020-02-14 | 苏州研创自动化设备有限公司 | Extension nozzle for injection valve |
Non-Patent Citations (1)
| Title |
|---|
| 王运赣，张祥林: "《微滴喷射自由成形》", 31 October 2009, 华中科技大学出版社 * |
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Application publication date: 20201117 |