CN114985222B - Piezoelectric injection valve convenient to stroke is adjusted - Google Patents
Piezoelectric injection valve convenient to stroke is adjusted Download PDFInfo
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- CN114985222B CN114985222B CN202210634760.2A CN202210634760A CN114985222B CN 114985222 B CN114985222 B CN 114985222B CN 202210634760 A CN202210634760 A CN 202210634760A CN 114985222 B CN114985222 B CN 114985222B
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- rod
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- piezoelectric
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
- B05C11/10—Storage, supply or control of liquid or other fluent material; Recovery of excess liquid or other fluent material
- B05C11/1002—Means for controlling supply, i.e. flow or pressure, of liquid or other fluent material to the applying apparatus, e.g. valves
- B05C11/1026—Valves
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/30—Use of alternative fuels, e.g. biofuels
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- Fuel-Injection Apparatus (AREA)
Abstract
The invention belongs to the technical field of dispensing and spraying, and particularly relates to a piezoelectric injection valve convenient for stroke adjustment, which comprises a valve body and a piezoelectric ceramic rod arranged in the valve body, wherein the valve body is provided with a valve seat; the upper end of the piezoelectric ceramic rod is in transmission connection with the upper cross rod, the upper cross rod is in rotary connection with the valve body, an upper adjusting rod is arranged on the valve body and is in threaded connection with the valve body, the lower end of the upper adjusting rod is abutted with the upper cross rod, and the piezoelectric ceramic rod and the upper adjusting rod are respectively arranged on two sides of the upper cross rod; the lower extreme and the bottom rail transmission of piezoceramics pole are connected, and the bottom rail rotates with the valve body to be connected, and the one end that the bottom rail kept away from piezoceramics pole is provided with the firing pin, and the cover is equipped with the spring on the firing pin, and the lower extreme of firing pin is provided with the nozzle. According to the piezoelectric injection valve provided by the invention, the initial position of the firing pin can be adjusted by arranging the upper adjusting rod, so that the stroke adjustment is realized, the stroke adjustment is independent of the precision and the size of the piezoelectric ceramic rod, and the stroke adjustment is simplified.
Description
Technical Field
The invention belongs to the technical field of dispensing and spraying, and particularly relates to a piezoelectric injection valve convenient for stroke adjustment.
Background
The piezoelectric injection valve is widely applied to the fields of 3C electronics, semiconductor production and manufacture, aerospace and the like as a valve for high-precision, micro-quantity and non-contact dispensing.
The stroke of the firing pin in the piezoelectric injection valve, the cooperation of the firing pin and the nozzle during the action of the firing pin and the voltage control of the controller directly influence the dispensing precision and the stability. In the production process of the piezoelectric injection valve, the prior art mostly depends on repeated debugging of experience of technicians, and partial parameters need to be measured in an auxiliary mode by using a high-precision instrument, so that the operation difficulty is high, the period is long, and the cost is high.
How to make the stroke adjustment of the piezoelectric injection valve simpler is a problem to be solved.
Disclosure of Invention
The embodiment of the invention aims to provide a piezoelectric injection valve convenient for stroke adjustment, and aims to solve the problem that the conventional piezoelectric injection valve is inconvenient in stroke adjustment.
The embodiment of the invention is realized in such a way that the piezoelectric injection valve convenient for stroke adjustment comprises a valve body and a piezoelectric ceramic rod arranged in the valve body;
the upper end of the piezoelectric ceramic rod is in transmission connection with the upper cross rod, the upper cross rod is in rotary connection with the valve body, an upper adjusting rod is arranged on the valve body and is in threaded connection with the valve body, the lower end of the upper adjusting rod is abutted with the upper cross rod, and the piezoelectric ceramic rod and the upper adjusting rod are respectively arranged on two sides of the upper cross rod;
the lower extreme and the bottom rail transmission of piezoceramics pole are connected, and the bottom rail rotates with the valve body to be connected, and the one end that the bottom rail kept away from piezoceramics pole is provided with the firing pin, and the cover is equipped with the spring on the firing pin, and the lower extreme of firing pin is provided with the nozzle.
According to the piezoelectric injection valve provided by the invention, the initial position of the firing pin can be adjusted by arranging the upper adjusting rod, so that the stroke adjustment is realized, the stroke adjustment is independent of the precision and the size of the piezoelectric ceramic rod, and the stroke adjustment is simplified.
Drawings
FIG. 1 is a block diagram of a piezoelectric injection valve with convenient stroke adjustment according to an embodiment of the present invention;
FIG. 2 is a block diagram of a nozzle regulator in a piezo jet valve for facilitating stroke adjustment according to an embodiment of the present invention;
FIG. 3 is a block diagram of a piezoelectric injection valve according to another embodiment of the invention for facilitating stroke adjustment.
In the accompanying drawings: 1. a valve body; 2. an upper adjusting rod; 3. an upper cross bar; 4. a first rotating shaft; 5. a piezoelectric ceramic rod; 6. a second rotating shaft; 7. a lower cross bar; 8. a striker; 9. a spring; 10. a nozzle adjusting device; 11. a nozzle; 12. a holding rod; 13. an arc-shaped groove.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Specific implementations of the invention are described in detail below in connection with specific embodiments.
As shown in fig. 1, the structure diagram of a piezoelectric injection valve for facilitating stroke adjustment provided by an embodiment of the invention comprises a valve body 1 and a piezoelectric ceramic rod 5 arranged in the valve body 1;
the upper end of the piezoelectric ceramic rod 5 is in transmission connection with the upper cross rod 3, the upper cross rod 3 is in rotary connection with the valve body 1, the upper adjusting rod 2 is arranged on the valve body 1, the upper adjusting rod 2 is in threaded connection with the valve body 1, the lower end of the upper adjusting rod 2 is abutted with the upper cross rod 3, and the piezoelectric ceramic rod 5 and the upper adjusting rod 2 are respectively arranged on two sides of the upper cross rod 3;
the lower extreme and the bottom rail 7 transmission of piezoceramics pole 5 are connected, and the bottom rail 7 rotates with valve body 1 to be connected, and the one end that the bottom rail 7 kept away from piezoceramics pole 5 is provided with firing pin 8, and the cover is equipped with spring 9 on the firing pin 8, and the lower extreme of firing pin 8 is provided with nozzle 11.
In this embodiment, the piezoelectric ceramic is a material capable of converting electric energy into mechanical energy, and is deformed with a change in voltage applied thereto. The piezoelectric ceramic rod 5 of the present invention is formed in a rod shape, and the firing pin 8 is driven to operate by deformation in the longitudinal direction of the rod to open or close the nozzle 11. In the present embodiment, it is understood that the piezoelectric ceramic rod 5 is energized to control the deformation of the piezoelectric ceramic rod 5, and the magnitude of the deformation amount is controlled by changing the magnitude of the applied voltage.
In this embodiment, the valve body 1 may be in a shape of a cuboid or a cylinder, and the valve body 1 is hollow, and the structures of the piezoelectric ceramic rod 5, the upper cross rod 3, the lower cross rod 7, the striker 8, and the like are all disposed in the valve body 1, so that the invention is specifically limited to the material of the valve body 1, the molding process, and the like.
In the present embodiment, the upper end of the piezoelectric ceramic is in driving connection with the upper rail 3, and the driving connection here includes various forms, such as abutment, sliding connection, hinge connection, etc., as long as the transmission of the movement of the upper rail 3 to the piezoelectric ceramic is achieved.
In this embodiment, the upper adjusting rod 2 is in threaded connection with the valve body 1, and the upper and lower positions of the upper adjusting rod 2 can be adjusted by rotating the upper adjusting rod 2, so that the upper cross rod 3 is driven to rotate, and the rotating upper cross rod 3 can enable the piezoelectric ceramic rod 5 to move up and down by a small extent, so that the rotating angle of the lower cross rod 7, namely the stroke of the piezoelectric ceramic rod 5 or the firing pin 8, under the same deformation of the piezoelectric ceramic rod 5 is changed.
According to the piezoelectric injection valve provided by the invention, the initial position of the firing pin 8 can be adjusted by arranging the upper adjusting rod 2, so that the stroke adjustment is realized, the stroke adjustment is independent of the precision and the size of the piezoelectric ceramic rod 5, and the stroke adjustment is simplified. The invention is suitable for the calibration process of the piezoelectric injection valve production factory, and is also suitable for the inaccurate adjustment of the stroke caused by the abrasion of the firing pin 8, the mechanical vibration, the voltage fluctuation and the like in the use process of the piezoelectric injection valve.
As an alternative embodiment of the invention, the upper cross bar 3 is rotatably connected to the valve body 1 via a first swivel axis 4.
In the present embodiment, further, the distance (power arm) from the upper adjustment lever 2 to the center of the first rotation shaft 4 is larger than the distance (resistance arm) from the piezoelectric ceramic lever 5 to the center of the first rotation shaft 4. Under the setting, can adopt less power to change the upper and lower position of piezoceramics pole 5, reduce the rotatory resistance of upper adjusting pole 2, simultaneously, utilize the amplification effect of lever, improved the regulation precision of upper adjusting pole 2, reduce the displacement of the piezoceramics that single pitch corresponds, make the regulation more accurate.
As an alternative embodiment of the invention, the lower cross bar 7 is rotatably connected to the valve body 1 via a second rotation shaft 6.
In the present embodiment, further, the distance (resistance arm) of the striker 8 to the center of the second rotation shaft 6 is larger than the distance (power arm) of the piezoelectric ceramic rod 5 to the center of the second rotation shaft 6. Under the arrangement, the smaller displacement can be amplified through the lever of the lower cross rod 7 to obtain the larger displacement, the requirement on the total deformation of the piezoelectric ceramic rod 5 is reduced, and the requirement on the voltage adjusting range is reduced.
As shown in fig. 2, as an alternative embodiment of the present invention, the nozzle 11 is provided in the nozzle adjusting device 10, the nozzle adjusting device 10 is connected to the valve body 1 by a screw, and the distance between the nozzle 11 and the striker 8 can be adjusted by rotating the nozzle adjusting device 10.
In the present embodiment, the nozzle adjusting device 10 is provided as a sleeve with an internal thread, in which the nozzle 11 is placed, which sleeve is rotatably connected to the valve body 1 by means of a thread. By rotating the sleeve, the distance between the nozzle 11 and the striker 8 can be adjusted, so that the "stroke" is adjusted from the output, where the requirements for the stroke of the piezo ceramic/striker 8 are actually changed, and the stroke of the piezo ceramic/striker 8 is made to meet the requirements by adjusting the position of the nozzle 11, with the stroke of the piezo ceramic/striker 8 unchanged. It will be understood that the stroke reaching requirement in the present invention means that the distance between the striker 8 and the nozzle 11 reaches the set distance at both extreme positions of the operation of the striker 8, so that the adjustment can be performed either from the piezoelectric ceramic rod 5 or from the end of the striker 8 or from the end of the nozzle 11, or both, or in combination, for example, coarse adjustment by the nozzle adjusting device 10, and fine adjustment by the upper adjusting rod 2.
As an alternative embodiment of the present invention, the valve body 1 includes an upper valve body 1 and a lower valve body 1, and the piezoelectric ceramic rod 5 and the striker 8 are both disposed on the upper valve body 1; the nozzle 11 is provided in the lower valve body 1;
the lower valve body 1 is also provided with an inlet which is communicated with the nozzle 11.
In the present embodiment, the upper valve body 1 and the lower valve body 1 may be integrally connected by screws. The side of the lower valve body 1 is also provided with an inlet which communicates with the nozzle 11 through an internal flow passage, which belongs to the conventional arrangement of injection valves, and the arrangement of the inlet and the internal flow passage is not specifically described in the present invention, which does not affect the implementation of the present invention.
As shown in fig. 3, as an alternative embodiment of the present invention, the piezoelectric injection valve for facilitating stroke adjustment further includes an angle retaining mechanism, where the angle protecting mechanism is disposed at the contact position between the upper cross bar 3 and the piezoelectric ceramic bar 5, for retaining the relative angle between the piezoelectric ceramic bar 5 and the lower cross bar 7.
In this embodiment, by setting the angle retaining mechanism, when the bottom rail 7 rotates around the second rotation shaft 6, the relative angle between the bottom rail 7 and the piezoelectric ceramic rod 5 is kept unchanged, so that the piezoelectric ceramic rod 5 is always perpendicular to the bottom rail 7, and the maximum displacement ratio is obtained. It is understood that the displacement ratio herein refers to the ratio of the displacement amount of the end of the lower cross bar 7 to the deformation amount of the piezoelectric ceramics; by providing the angle holding mechanism, the displacement ratio can be held at 1.
As an alternative embodiment of the invention, the angle retaining mechanism comprises a retaining rod 12 arranged on the valve body 1 and an arc-shaped groove 13 arranged on the upper cross rod 3;
the top of the piezoelectric ceramic rod 5 is in sliding connection with the arc-shaped groove 13 through a pin shaft, the retaining rod 12 is a telescopic rod, one end of the retaining rod 12 is rotationally connected with the valve body 1, and the other end of the retaining rod is rotationally connected to the pin shaft;
when the piezoelectric ceramic rod 5 stretches and contracts, the holding rod 12 stretches and contracts synchronously, so that the top of the piezoelectric ceramic rod 5 slides along the arc-shaped groove 13, and the relative angle between the piezoelectric ceramic rod 5 and the lower cross rod 7 is maintained.
In the present embodiment, the holding rod 12 is simultaneously contracted when the piezoelectric ceramic rod 5 is contracted, so that the piezoelectric ceramic rod 5 is pushed or pulled (pushed when the piezoelectric ceramic rod 5 is extended, pulled when the piezoelectric ceramic rod 5 is shortened) to move along the arc-shaped groove 13. In the present embodiment, the shape and position of the arc-shaped groove 13 can be obtained by: the piezoelectric ceramic rod 5 is rotated along with the lower cross bar 7, and a corresponding elongation or shortening value (the rotation angle range linearly corresponds to the expansion value, for example, the rotation range is 0 ° to 10 °, and the elongation range is 0mm to 1mm, and the expansion value is increased by 0.1mm every 1 ° for the rotation angle), is added to each rotation angle, so that the locus of the free end of the piezoelectric ceramic rod 5, that is, the shape and the position of the arc groove 13 can be obtained.
As an alternative embodiment of the present invention, the piezoceramic rod 5 is fixedly connected with the lower cross bar 7.
In this embodiment, it is understood that the fixed connection means that the relative angle between the piezoceramic rod 5 and the bottom rail 7 is kept at a fixed value, and the two cannot rotate relatively.
As an alternative embodiment of the present invention, the holding rod 12 is made of piezoelectric ceramics.
In this embodiment, the holding rod 12 is also made of piezoelectric ceramics, and the deformation of the piezoelectric ceramics can be used to drive the piezoelectric ceramic rod 5 to move along the arc-shaped groove 13. The mode does not need to additionally add other driving mechanisms, and meanwhile, piezoelectric ceramics are adopted, so that the mode has quite similar deformation dimensions.
As an alternative embodiment of the present invention, the holding rod 12 is arranged in parallel with the power supply of the piezoceramic rod 5.
In this embodiment, the holding rod 12 is connected in parallel with the piezoelectric ceramic rod 5, so that the holding rod 12 and the piezoelectric ceramic rod 5 have the same voltage at any time, and the holding rod 12 and the piezoelectric ceramic rod 5 have the same deformation under the same voltage by selecting the holding rod 12 with corresponding parameters (including length, cross section, voltage deformation ratio and the like), so that the piezoelectric ceramic rod 5 moves stably in the arc-shaped groove 13.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (8)
1. The piezoelectric injection valve is characterized by comprising a valve body and a piezoelectric ceramic rod arranged in the valve body;
the upper end of the piezoelectric ceramic rod is in transmission connection with the upper cross rod, the upper cross rod is in rotary connection with the valve body, an upper adjusting rod is arranged on the valve body and is in threaded connection with the valve body, the lower end of the upper adjusting rod is abutted with the upper cross rod, and the piezoelectric ceramic rod and the upper adjusting rod are respectively arranged on two sides of the upper cross rod;
the lower end of the piezoelectric ceramic rod is in transmission connection with a lower cross rod, the lower cross rod is in rotary connection with the valve body, a firing pin is arranged at one end of the lower cross rod, which is far away from the piezoelectric ceramic rod, a spring is sleeved on the firing pin, and a nozzle is arranged at the lower end of the firing pin;
the piezoelectric injection valve convenient for stroke adjustment further comprises an angle retaining mechanism, wherein the angle retaining mechanism is arranged at the joint of the upper cross rod and the piezoelectric ceramic rod and used for retaining the relative angle between the piezoelectric ceramic rod and the lower cross rod;
the angle retaining mechanism comprises a retaining rod arranged on the valve body and an arc-shaped groove arranged on the upper cross rod;
the top of the piezoelectric ceramic rod is in sliding connection with the arc-shaped groove through a pin shaft, the retaining rod is a telescopic rod, one end of the retaining rod is rotationally connected with the valve body, and the other end of the retaining rod is rotationally connected to the pin shaft;
when the piezoelectric ceramic rod stretches and contracts, the retaining rod stretches and contracts synchronously so that the top of the piezoelectric ceramic rod slides along the arc-shaped groove, and the relative angle between the piezoelectric ceramic rod and the lower cross rod is retained.
2. The piezo jet valve for facilitating stroke adjustment according to claim 1, wherein said upper cross bar is rotatably connected to the valve body via a first pivot.
3. The piezoelectric jetting valve of claim 1, wherein the bottom rail is rotatably coupled to the valve body via a second shaft.
4. The piezoelectric jetting valve of claim 1, wherein the nozzle is disposed in a nozzle regulator, the nozzle regulator is connected to the valve body by a screw thread, and the distance between the nozzle and the striker is adjustable by rotating the nozzle regulator.
5. The piezoelectric injection valve of claim 1, wherein said valve body comprises an upper valve body and a lower valve body, said piezoelectric ceramic rod and said striker being disposed on said upper valve body; the nozzle is arranged on the lower valve body;
and an inlet is further formed in the lower valve body and communicated with the nozzle.
6. The piezoelectric jetting valve of claim 1, wherein the piezoelectric ceramic rod is fixedly connected to the bottom rail.
7. The piezoelectric jetting valve of claim 1, wherein the retaining rod is made of piezoelectric ceramic.
8. The piezoelectric jetting valve of claim 7, wherein the retaining rod is disposed in parallel with a power supply of the piezoceramic rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210634760.2A CN114985222B (en) | 2022-06-06 | 2022-06-06 | Piezoelectric injection valve convenient to stroke is adjusted |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210634760.2A CN114985222B (en) | 2022-06-06 | 2022-06-06 | Piezoelectric injection valve convenient to stroke is adjusted |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114985222A CN114985222A (en) | 2022-09-02 |
| CN114985222B true CN114985222B (en) | 2023-04-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210634760.2A Active CN114985222B (en) | 2022-06-06 | 2022-06-06 | Piezoelectric injection valve convenient to stroke is adjusted |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115532531A (en) * | 2022-09-28 | 2022-12-30 | 东莞市凯格精机股份有限公司 | Self-tuning method of piezoelectric injection valve |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6742728B2 (en) * | 2001-08-10 | 2004-06-01 | Caterpillar Inc | Electrical actuator subassembly with external threads and fuel injector using same |
| KR100879927B1 (en) * | 2007-05-29 | 2009-01-23 | 인하대학교 산학협력단 | Dispenser head of non-contact type using piezoelectric actuator and return spring |
| KR101451523B1 (en) * | 2013-10-01 | 2014-10-16 | 이구환 | Dispenser for high accuracy jet |
| CN208099615U (en) * | 2018-03-30 | 2018-11-16 | 安徽姜尚工艺品股份有限公司 | A kind of efficient laser engraving machine |
| CN109332097B (en) * | 2018-11-29 | 2023-06-23 | 江苏高凯精密流体技术股份有限公司 | Feedback-regulated injection dispensing device and regulating method thereof |
| CN112058521A (en) * | 2019-05-24 | 2020-12-11 | 深圳市腾盛精密装备股份有限公司 | Precise piezoelectric injection valve, dispensing device and calibration method |
| CN111036427A (en) * | 2020-01-04 | 2020-04-21 | 林景茂 | Piezoelectric adjusting mechanism of injection valve and piezoelectric injection valve |
| CN111589643A (en) * | 2020-05-26 | 2020-08-28 | 深圳市新迈自动化科技有限公司 | Piezoelectric injection valve and adhesive dispensing device |
| CN114515676A (en) * | 2020-11-20 | 2022-05-20 | 苏州卓兆点胶股份有限公司 | Piezoelectric ceramic injection valve |
| CN113102178A (en) * | 2021-04-08 | 2021-07-13 | 广东安达智能装备股份有限公司 | Ultrahigh-speed dispensing electromagnetic valve convenient to debug |
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