CN203463267U - Mutually-inductive piezoelectric equal-proportion blending pump - Google Patents
Mutually-inductive piezoelectric equal-proportion blending pump Download PDFInfo
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- CN203463267U CN203463267U CN201320502436.1U CN201320502436U CN203463267U CN 203463267 U CN203463267 U CN 203463267U CN 201320502436 U CN201320502436 U CN 201320502436U CN 203463267 U CN203463267 U CN 203463267U
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- piezoelectric
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- cavity shell
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Abstract
The utility model relates to a mutually-inductive piezoelectric equal-proportion blending pump and belongs to a miniature precise liquid blending device. A left pump cavity shell and a right pump cavity shell are respectively and fixedly connected with a middle pump body through bolts, a piezoelectric vibrator I is tightly pressed between the left pump cavity shell and the pump body through a seal ring, a piezoelectric vibrator II is tightly pressed between the right pump cavity shell and the pump body through a seal ring, an inlet umbrella-shaped valve I and an outlet umbrella-shaped valve I are respectively and fixedly connected with the left pump cavity shell, an inlet umbrella-shaped valve II and an outlet umbrella-shaped valve II are respectively and fixedly connected with the right pump cavity shell, a piezoelectric wafer I and a piezoelectric wafer IV which are close to the pump cavity shells are respectively connected with two alternating-current driving power supplies, and a piezoelectric wafer II and a piezoelectric wafer III which are close to the pump body are connected with a feedback control circuit. The mutually-inductive piezoelectric equal-proportion blending pump has the advantages that the structure is novel, the pump can be more direct and reliable through comparison of voltage signals generated by self deformation of the piezoelectric wafers, the blending precision is high, an externally-arranged sensor is not needed, the microminiaturization is convenient, and the cost is reduced.
Description
Technical field
The utility model belongs to a kind of small liquid precision deployment device, specifically refers to a kind of for realizing the twin-wafer type piezoelectric pump of two kinds of liquid equal proportion allotments.
Background technique
Piezoelectric pump be a kind ofly there is accurate output, volume is little, energy consumption is low, without electromagnetic interference, react the Piexoelectric actuator of the advantage such as fast, in fields such as micro electronmechanical, aviation, medical apparatus, bioengineering, chemical machineries, there is wide application prospect.The piezoelectric pump for allocating of developing in recent years, as Chinese patent 201220200501.0,201210050805.8,200820080781.x, how by allotment with mix and carry out simultaneously, but two kinds of liquid intercouple and do the used time, and the control of allotment ratio is difficulty comparatively, the wave properties of output flow is large, the precision of allotment is lower, if improve the precision of allotment, must be outside piezoelectric pump additional flow detecting sensor, be unfavorable for the microminiaturization of whole system, and design cost improves.
Many in practical application allotment is carried out with mixing to separate, and it is selective on market, to have more ripe mixer.Therefore, without the mutual inductance of additional flow transducer, know that accurate allotment piezoelectric pump has higher market and using value.
Summary of the invention
The utility model provides a kind of mutual inductance to know piezoelectricity equal proportion allotment pump, low in order to solve current allotment pump precision, the problem that needs additional detecting sensor, utilize piezoelectric bimorph simultaneously as driving and sensor, the voltage signal producing by two piezoelectric chip piezoelectric effects compares mutually, adjust the output flow of two pump chambers, improved the output accuracy of piezoelectricity allotment pump, and provide a kind of new approach for the microminiaturization of piezoelectricity allotment pump.
The technical solution adopted in the utility model is: left pump chamber housing, right pump chamber housing is bolted to connection with the middle pump housing respectively, piezoelectric vibrator one is pressed between left pump chamber housing and the pump housing by seal ring, piezoelectric vibrator two-way is crossed seal ring and is pressed between right pump chamber housing and the pump housing, described piezoelectric vibrator one is by beryllium bronze substrate one and piezoelectric chip one, piezoelectric chip two is bonding to be formed, described piezoelectric vibrator two is by beryllium bronze substrate two and piezoelectric chip three, piezoelectric chip four is bonding to be formed, entrance umbrella valve one is fixedly connected with left pump chamber housing respectively with outlet umbrella valve one, entrance umbrella valve two is fixedly connected with right pump chamber housing respectively with outlet umbrella valve two, piezoelectric chip one near pump chamber housing is connected respectively two AC driven powers with piezoelectric chip four, piezoelectric chip two near the pump housing, piezoelectric chip three is connected with feedback control circuit.
The utility model has the advantage of: novel structure, adopt two twin lamella piezoelectric vibrators to drive and sensing simultaneously, by the equal proportion allotment output that mutually relatively realizes two kinds of different liquids of sense voltage, the advantage having: the voltage signal 1. producing by piezo-electric sheet self-deformation contrasts, more directly reliable, 2. the precision height of allotment does not need peripheral sensors, facilitates microminiaturization and has saved cost.
Accompanying drawing explanation
Fig. 1 is preferred embodiment piezoelectricity pump structure sectional view of the utility model;
Fig. 2 is the side view of Fig. 1;
Fig. 3 is control principle block diagram of the present utility model.
Embodiment
As shown in Figure 1, left pump chamber housing 2, right pump chamber housing 14 is fixedly connected with by bolt 3 with the middle pump housing 5 respectively, piezoelectric vibrator one is pressed between left pump chamber housing and the pump housing by seal ring 10, piezoelectric vibrator two-way is crossed seal ring 10 and is pressed between right pump chamber housing and the pump housing, described piezoelectric vibrator one is by beryllium bronze substrate 1 and piezoelectric chip 1, piezoelectric chip 27 is bonding to be formed, described piezoelectric vibrator two is by beryllium bronze substrate 2 12 and piezoelectric chip 3 11, piezoelectric chip 4 13 is bonding to be formed, entrance umbrella valve 1 is fixedly connected with left pump chamber housing 2 respectively with outlet umbrella valve 1, entrance umbrella valve 2 15 is fixedly connected with right pump chamber housing 14 respectively with outlet umbrella valve 28, piezoelectric chip 1 near pump chamber housing is connected respectively two AC driven powers with piezoelectric chip 4 13, piezoelectric chip 27 near the pump housing, piezoelectric chip 3 11 is connected with feedback control circuit.
In the utility model, feedback control circuit comprises voltage signal analysis comparison module and driving power control module, and voltage signal analysis module is connected with piezoelectric chip 27, piezoelectric chip 3 11, and driving power control module is connected with two AC driven powers.
The utility model working method: drive piezoelectric chip 1 and piezoelectric chip 4 13 double vibrations under the excitation of ac power supply near two of pump chamber, when piezoelectric vibrator bends towards a side that makes pump chamber increase, in pump chamber, pressure reduces, the umbrella valve of liquid inlet is opened, the umbrella valve of liquid outlet is closed, and liquid flows into pump chamber; When piezoelectric vibrator bends towards while making a side that pump chamber reduces, in pump chamber, pressure increases, and the umbrella valve of liquid outlet is opened, and the umbrella valve of liquid inlet is closed, and liquid is discharged pump chamber.When know the vibration generation deformation with piezoelectric vibrator of piezoelectric chip 27, piezoelectric chip 3 11 near two mutual inductances of the pump housing, due to piezoelectric effect, two piezoelectric chips 27, piezoelectric chip 3 11 produce two voltage signals
with
, wherein
for reference voltage,
for adjusting voltage, two voltage signals are analyzed in comparison module and are compared at voltage signal, when
time, driving power control module is controlled voltage
the AC drive voltage of corresponding driving piezoelectric chip reduces, when
time, driving power control module is controlled voltage
the AC drive voltage of corresponding piezoelectric chip increases, until
, when the frequency of driving power is constant, the amount of deflection of piezoelectric vibrator becomes good proportional relationship with the amplitude of input voltage, so now the amount of deflection of two piezoelectric vibrators is identical, piezoelectricity allotment pump can be realized the equal proportion output of two kinds of different liquids.
Claims (1)
1. piezoelectricity equal proportion allotment pump is known in a mutual inductance, it is characterized in that: left pump chamber housing, right pump chamber housing is bolted to connection with the middle pump housing respectively, piezoelectric vibrator one is pressed between left pump chamber housing and the pump housing by seal ring, piezoelectric vibrator two-way is crossed seal ring and is pressed between right pump chamber housing and the pump housing, described piezoelectric vibrator one is by beryllium bronze substrate one and piezoelectric chip one, piezoelectric chip two is bonding to be formed, described piezoelectric vibrator two is by beryllium bronze substrate two and piezoelectric chip three, piezoelectric chip four is bonding to be formed, entrance umbrella valve one is fixedly connected with left pump chamber housing respectively with outlet umbrella valve one, entrance umbrella valve two is fixedly connected with right pump chamber housing respectively with outlet umbrella valve two, piezoelectric chip one near pump chamber housing is connected respectively two AC driven powers with piezoelectric chip four, piezoelectric chip two near the pump housing, piezoelectric chip three is connected with feedback control circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320502436.1U CN203463267U (en) | 2013-08-18 | 2013-08-18 | Mutually-inductive piezoelectric equal-proportion blending pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320502436.1U CN203463267U (en) | 2013-08-18 | 2013-08-18 | Mutually-inductive piezoelectric equal-proportion blending pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203463267U true CN203463267U (en) | 2014-03-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320502436.1U Expired - Fee Related CN203463267U (en) | 2013-08-18 | 2013-08-18 | Mutually-inductive piezoelectric equal-proportion blending pump |
Country Status (1)
| Country | Link |
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| CN (1) | CN203463267U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103388578A (en) * | 2013-08-18 | 2013-11-13 | 吉林大学 | Mutually-inductive piezoelectric equal-proportion blending pump |
| ES2686420A1 (en) * | 2018-06-12 | 2018-10-17 | Iñigo Lizari Illarramendi S.L. | Procedure for the generation of piezoelectricity by liquid interaction of alternating pressure and apparatus for its implementation (Machine-translation by Google Translate, not legally binding) |
-
2013
- 2013-08-18 CN CN201320502436.1U patent/CN203463267U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103388578A (en) * | 2013-08-18 | 2013-11-13 | 吉林大学 | Mutually-inductive piezoelectric equal-proportion blending pump |
| CN103388578B (en) * | 2013-08-18 | 2016-04-06 | 吉林大学 | Piezoelectricity equal proportion allotment pump is known in mutual inductance |
| ES2686420A1 (en) * | 2018-06-12 | 2018-10-17 | Iñigo Lizari Illarramendi S.L. | Procedure for the generation of piezoelectricity by liquid interaction of alternating pressure and apparatus for its implementation (Machine-translation by Google Translate, not legally binding) |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140305 Termination date: 20140818 |
|
| EXPY | Termination of patent right or utility model |