CN208380847U - A kind of novel piezoelectric screw pump - Google Patents
A kind of novel piezoelectric screw pump Download PDFInfo
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- CN208380847U CN208380847U CN201820754220.7U CN201820754220U CN208380847U CN 208380847 U CN208380847 U CN 208380847U CN 201820754220 U CN201820754220 U CN 201820754220U CN 208380847 U CN208380847 U CN 208380847U
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- ceramic piece
- piezoelectric ceramic
- piezoelectric
- screw
- gasket
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Abstract
The utility model discloses a kind of novel piezoelectric screw pump, novel piezoelectric screw pump includes rubber bushing and piezoelectric, screws.Rubber bushing is hollow circuit cylinder, and inner wall is equipped with screw thread；Piezoelectric, screws include screw rod, the first to the second gasket, first to fourth piezoelectric ceramic piece, first to third electrode slice and bolt；Screw rod and rubber bushing are threadedly coupled and sealingly engage；Screw rod has blind hole and tapped through hole at both ends along its central axes；It is threadedly coupled after the first gasket of screw bolt passes, the first piezoelectric ceramic piece, first electrode sheet, the second piezoelectric ceramic piece, second electrode sheet, third piezoelectric ceramic piece, third electrode slice, the second gasket with tapped through hole, the first to the second gasket, first to fourth piezoelectric ceramic piece, first to third electrode slice is fixed in blind hole.By motivating first to fourth piezoelectric ceramic piece, makes the cavity for generating screw in one direction between screw rod and rubber bushing, realize that the pump of liquid in cavity is defeated.
Description
Technical field
The utility model relates to piezoelectric pump and field of fluid machinery more particularly to a kind of novel piezoelectric screw pumps.
Background technique
Traditional single-screw (single screw) pump is to drive eccentric screw to work by peripheral hardware motor, and the separation of screw rod and motor can make
Structure is complicated, volume is big for pump, it is made to be not easy to minimize.There is no self-lock ability after motor power-off, this makes traditional single screw rod
The accurately pump that pump cannot achieve liquid is defeated.Motor operating can generate electromagnetic pollution, in the sensitive field of some pairs of electromagnetic interferences, pass
The single-screw (single screw) pump of system not can be used directly.In general, screw pump has fixed steering, can only unidirectional pump transfusion fluid can not be real
Existing two-way pump is defeated, and which has limited the flexibilities of screw pump.
Utility model content
Technical problem to be solved in the utility model is to provide one kind for defect involved in background technique
Novel piezoelectric screw pump.
The utility model is to solve the technical problem to use following technical scheme:
A kind of novel piezoelectric screw pump, including rubber bushing and piezoelectric, screws；
The rubber bushing is hollow circuit cylinder, and inner wall is equipped with screw thread；
The piezoelectric, screws include screw rod, the first to the second gasket, first to fourth piezoelectric ceramic piece, first to third electricity
Pole piece and bolt；
The screw thread that the screw rod outer wall is equipped with and the rubber bushing inner thread matches, screw rod and rubber bushing screw thread
Connection and sealed engagement；
The screw rod has blind hole and tapped through hole at both ends along its central axes；The blind hole, tapped through hole and
The screw coaxial, the radius of blind hole is greater than the radius of tapped through hole, and blind hole and tapped through hole are connected；
It is the first to the second gasket, first to fourth piezoelectric ceramic piece, first annular in shape to third electrode slice；
The screw rod sequentially passes through the first gasket, the first piezoelectric ceramic piece, first electrode sheet, the second piezoelectric ceramic piece,
It is threadedly coupled after two electrode slices, third piezoelectric ceramic piece, third electrode slice, the second gasket with the tapped through hole, by described the
One to the second gasket, first to fourth piezoelectric ceramic piece, first to third electrode slice are fixed in the blind hole；
First to fourth piezoelectric ceramic piece along its thickness direction polarize, be respectively formed polarization line of demarcation be its diameter,
Two opposite subregions of polarization direction；The polarization line of demarcation of first piezoelectric ceramic piece and the second piezoelectric ceramic piece is parallel, together
The polarization direction of side subregion is opposite；It mutually hangs down in the polarization line of demarcation of second piezoelectric ceramic piece and third piezoelectric ceramic piece
Directly；The polarization line of demarcation of the third piezoelectric ceramic piece and the 4th piezoelectric ceramic piece is parallel, the polarization direction phase of the same side subregion
Instead；
The second electrode sheet ground connection, first electrode sheet, third electrode slice connect external drive signal respectively.
As a kind of further prioritization scheme of novel piezoelectric screw pump of the utility model, the first to fourth piezoelectricity pottery
The two sides of tile are by epoxide resin material insulation processing.
The invention also discloses a kind of working methods based on the novel piezoelectric screw pump comprising the steps of:
The sinusoidal signal of pi/2 is differed in application time phase by distinguishing on first electrode sheet, third electrode slice, so that
Screw rod generation time and spatially all with two similar shape bending vibration modes of pi/2 phase difference, the coupling of two mode makes the screw rod be in
Existing rotoflector vibration realizes liquid in cavity to make it generate the cavity of screw in one direction between rubber bushing
The pump of body is defeated；
By changing the sequencing of the time phase difference of first electrode sheet, the sinusoidal signal applied on third electrode slice,
Change the defeated direction of pump of liquid, realizes that two-way pump is defeated.
The utility model compared with the prior art by using the above technical solution, has following technical effect that
The utility model keeps piezoelectric, screws pump configuration more compact, no electromagnetic interference, and has the essence for realizing tiny flow quantity
The defeated and defeated ability of two-way pump is really pumped, flexibility is improved.
Detailed description of the invention
Fig. 1 is a kind of sectional view of novel piezoelectric screw pump；
Fig. 2 is the sectional view of rubber bushing；
Fig. 3 is the sectional view of piezoelectric, screws；
Fig. 4 is the sectional view of screw rod；
Fig. 5 is the polarization situation and application electric signal schematic diagram of piezoelectric ceramic piece group；
Fig. 6 is relative position figure of the back lash a ~ e on helix；
Fig. 7 is the working principle diagram that liquid is pumped a defeated screw pitch.
In figure, 1: rubber bushing；1-1: screw thread；2: piezoelectric, screws；2-1: screw rod；2-2: annulus gasket；2-3: piezoelectricity pottery
Tile group；2-4: bolt；2-5: screw thread；2-1-1: blind hole；2-1-2: tapped through hole.
Specific embodiment
The technical solution of the utility model is described in further detail with reference to the accompanying drawing:
The utility model can be embodied in many different forms, and should not be assumed that be limited to the embodiments described herein.
On the contrary, it is thorough and complete to these embodiments are provided so that the disclosure, and this reality will be given full expression to those skilled in the art
With novel range.In the accompanying drawings, for the sake of clarity it is exaggerated component.
The utility model discloses a kind of novel piezoelectric screw rod pump configuration, including rubber bushing and a piezoelectric, screws, rubbers
Glue bushing and the engagement of the thread seal of piezoelectric, screws, as shown in Figure 1.
Rubber bushing is hollow circuit cylinder, and inner wall has screw thread, as shown in Figure 2.
Screw rod has blind hole and tapped through hole at both ends along central axes；Blind hole, tapped through hole and screw coaxial, it is blind
The radius in hole is greater than the radius of tapped through hole, and blind hole and tapped through hole are connected, as shown in Figure 4.
Piezoelectric, screws include screw rod, the first to the second gasket, first to fourth piezoelectric ceramic piece, first to third electrode slice
And bolt；It is the first to the second gasket, first to fourth piezoelectric ceramic piece, first annular in shape to third electrode slice；Screw rod according to
It is secondary to pass through the first gasket, the first piezoelectric ceramic piece, first electrode sheet, the second piezoelectric ceramic piece, second electrode sheet, third piezoelectricity pottery
It is threadedly coupled after tile, third electrode slice, the second gasket with tapped through hole, by the first to the second gasket, first to fourth piezoelectricity
Potsherd, first to third electrode slice are fixed in blind hole as shown in Figure 3.
First to fourth piezoelectric ceramic piece polarizes along its thickness direction, and being respectively formed polarization line of demarcation is its diameter, polarization
Two contrary subregions；The polarization line of demarcation of first piezoelectric ceramic piece and the second piezoelectric ceramic piece is parallel, the same side subregion
Polarization direction it is opposite；The polarization line of demarcation of second piezoelectric ceramic piece and third piezoelectric ceramic piece is mutually perpendicular to；Third piezoelectricity pottery
The polarization line of demarcation of tile and the 4th piezoelectric ceramic piece is parallel, and the polarization direction of the same side subregion is opposite.First electrode sheet, third
The sinusoidal signal that pi/2 is differed in application time phase is distinguished on electrode slice, as shown in Figure 5.
In addition, the two sides of first to fourth piezoelectric ceramic piece are by epoxide resin material insulation processing.
By motivating first to fourth piezoelectric ceramic piece, piezoelectric, screws generation time and spatially all have pi/2 phase poor
Two similar shape bending vibration modes, the coupling of two mode makes piezoelectric, screws that rotoflector vibration be presented to making itself and rubber bushing
Sealed engagement screw thread between generate the cavity of screw in one direction, realize that the pump of liquid in cavity is defeated.With first to
4th piezoelectric ceramic piece is inspired for first-order flexure resonance mode, and the vibration of single order rotoflector is presented in piezoelectric, screws at this time,
Remember by piezoelectric, screws without the bending vibration in yoz in-plane bending vibration, the only face xoy and at the time of bending to the negative direction of x-axis
Volume for 0 moment and t=0, back lash a gradually increases to maximum, pressure reduction from zero, and liquid is entered between engagement by water inlet
In gap a.As t=T/4, piezoelectric, screws are without the bending vibration in the face xoy, the bending vibration only in the face yoz and to the negative of z-axis
Direction bending, the volume of back lash a are gradually decrease to zero, pressure rise, and the volume of back lash b gradually increases to most from zero
Greatly, pressure reduction, the liquid in a of back lash enter in the b of back lash along helicla flute.As t=T/2, piezoelectric, screws without
Yoz in-plane bending vibration only has the bending vibration in the face xoy and is bent to the positive direction of x-axis, and the volume of back lash b is gradually
It is decreased to zero, pressure rise, the volume of back lash c gradually increases to maximum, pressure reduction from zero, the liquid in the b of back lash
It is entered in the c of back lash along helicla flute.As t=3T/4, piezoelectric, screws without in the face xoy bending vibration, only the face yoz
It interior bending vibration and is bent to the positive direction of z-axis, back lash c volume is gradually decrease to zero, pressure rise, back lash d
Volume gradually increase to maximum, pressure reduction from zero, the liquid in the c of back lash can enter back lash d along helicla flute
In.As t=T, piezoelectric, screws without the bending vibration in the face yoz, the bending vibration only in the face xoy and to the negative direction of x-axis it is curved
Song, back lash d's is gradually decrease to zero, pressure rise, and the volume of back lash e gradually increases to maximum, pressure reduction from zero,
Liquid in the d of back lash enters in the e of back lash along helicla flute.This makes liquid move a spiral shell in helicla flute
Away from as shown in Figure 6 and Figure 7.Over time, the liquid of water inlet can be pumped defeated to discharge outlet.
By changing the sequencing of the time phase difference of first electrode sheet, the sinusoidal signal applied on third electrode slice,
Change the defeated direction of pump of liquid, realizes that two-way pump is defeated.
Those skilled in the art can understand that unless otherwise defined, all terms used herein (including skill
Art term and scientific term) there is meaning identical with the general understanding of those of ordinary skill in the utility model fields
Justice.It should also be understood that those terms such as defined in the general dictionary should be understood that with upper with the prior art
The consistent meaning of meaning hereinafter, and unless defined as here, will not with idealization or meaning too formal come
It explains.
Above-described specific embodiment, to the purpose of this utility model, technical scheme and beneficial effects carried out into
One step is described in detail, it should be understood that being not used to limit the foregoing is merely specific embodiment of the present utility model
The utility model processed, within the spirit and principle of the utility model, any modification, equivalent substitution, improvement and etc. done,
It should be included within the scope of protection of this utility model.
Claims (2)
1. a kind of novel piezoelectric screw pump, which is characterized in that including rubber bushing and piezoelectric, screws；
The rubber bushing is hollow circuit cylinder, and inner wall is equipped with screw thread；
The piezoelectric, screws include screw rod, the first to the second gasket, first to fourth piezoelectric ceramic piece, first to third electrode slice
And bolt；
The screw thread that the screw rod outer wall is equipped with and the rubber bushing inner thread matches, screw rod and rubber bushing are threadedly coupled
And it sealingly engages；
The screw rod has blind hole and tapped through hole at both ends along its central axes；The blind hole, tapped through hole are equal and described
Screw coaxial, the radius of blind hole is greater than the radius of tapped through hole, and blind hole and tapped through hole are connected；
It is the first to the second gasket, first to fourth piezoelectric ceramic piece, first annular in shape to third electrode slice；
The screw rod sequentially passes through the first gasket, the first piezoelectric ceramic piece, first electrode sheet, the second piezoelectric ceramic piece, the second electricity
After pole piece, third piezoelectric ceramic piece, third electrode slice, the second gasket with the tapped through hole be threadedly coupled, by described first to
Second gasket, first to fourth piezoelectric ceramic piece, first to third electrode slice are fixed in the blind hole；
First to fourth piezoelectric ceramic piece polarizes along its thickness direction, and being respectively formed polarization line of demarcation is its diameter, polarization
Two contrary subregions；The polarization line of demarcation of first piezoelectric ceramic piece and the second piezoelectric ceramic piece is parallel, the same side
The polarization direction of subregion is opposite；The polarization line of demarcation of second piezoelectric ceramic piece and third piezoelectric ceramic piece is mutually perpendicular to；Institute
The polarization line of demarcation for stating third piezoelectric ceramic piece and the 4th piezoelectric ceramic piece is parallel, and the polarization direction of the same side subregion is opposite；
The second electrode sheet ground connection, first electrode sheet, third electrode slice connect external drive signal respectively.
2. novel piezoelectric screw pump according to claim 1, which is characterized in that first to fourth piezoelectric ceramic piece
Two sides are by epoxide resin material insulation processing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820754220.7U CN208380847U (en) | 2018-05-21 | 2018-05-21 | A kind of novel piezoelectric screw pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820754220.7U CN208380847U (en) | 2018-05-21 | 2018-05-21 | A kind of novel piezoelectric screw pump |
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| Publication Number | Publication Date |
|---|---|
| CN208380847U true CN208380847U (en) | 2019-01-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820754220.7U Withdrawn - After Issue CN208380847U (en) | 2018-05-21 | 2018-05-21 | A kind of novel piezoelectric screw pump |
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| CN (1) | CN208380847U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108547768A (en) * | 2018-05-21 | 2018-09-18 | 南京航空航天大学 | A kind of novel piezoelectric screw pump and its working method |
| CN111283669A (en) * | 2020-03-27 | 2020-06-16 | 南京航空航天大学 | Sandwich type piezoelectric two-degree-of-freedom mechanical arm and driving method thereof |
-
2018
- 2018-05-21 CN CN201820754220.7U patent/CN208380847U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108547768A (en) * | 2018-05-21 | 2018-09-18 | 南京航空航天大学 | A kind of novel piezoelectric screw pump and its working method |
| CN108547768B (en) * | 2018-05-21 | 2023-08-01 | 南京航空航天大学 | Piezoelectric screw pump and working method thereof |
| CN111283669A (en) * | 2020-03-27 | 2020-06-16 | 南京航空航天大学 | Sandwich type piezoelectric two-degree-of-freedom mechanical arm and driving method thereof |
| CN111283669B (en) * | 2020-03-27 | 2022-04-22 | 南京航空航天大学 | Sandwich type piezoelectric two-degree-of-freedom mechanical arm and driving method thereof |
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| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20190115 Effective date of abandoning: 20230801 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20190115 Effective date of abandoning: 20230801 |