CN109877029B - Giant magnetostrictive ultrasonic transducer - Google Patents
Giant magnetostrictive ultrasonic transducer Download PDFInfo
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- CN109877029B CN109877029B CN201910153641.3A CN201910153641A CN109877029B CN 109877029 B CN109877029 B CN 109877029B CN 201910153641 A CN201910153641 A CN 201910153641A CN 109877029 B CN109877029 B CN 109877029B
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- giant magnetostrictive
- magnetic field
- magnetostrictive rod
- insulating resin
- liquid
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- 239000007788 liquid Substances 0.000 claims abstract description 41
- 239000011347 resin Substances 0.000 claims abstract description 22
- 229920005989 resin Polymers 0.000 claims abstract description 22
- 230000000694 effects Effects 0.000 claims abstract description 6
- 238000006243 chemical reaction Methods 0.000 claims description 10
- 238000010521 absorption reaction Methods 0.000 claims description 3
- 230000009467 reduction Effects 0.000 claims description 3
- 238000004364 calculation method Methods 0.000 claims description 2
- 239000004809 Teflon Substances 0.000 claims 1
- 229920006362 Teflon® Polymers 0.000 claims 1
- 230000005284 excitation Effects 0.000 abstract description 5
- 239000000463 material Substances 0.000 description 5
- 239000010408 film Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 229910052761 rare earth metal Inorganic materials 0.000 description 2
- 150000002910 rare earth metals Chemical class 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005415 magnetization Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- -1 polytetrafluoroethylene Polymers 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
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- General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention belongs to the field of ultrasonic processing, and particularly relates to a giant magnetostrictive ultrasonic transducer which comprises an outer shell, an inner shell, a base and a giant magnetostrictive rod arranged in the inner shell, wherein the giant magnetostrictive rod consists of a plurality of giant magnetostrictive slices which are spaced from each other, a plurality of uniformly distributed channels are formed in the giant magnetostrictive rod, and liquid insulating resin flows in the channels. The invention can relieve the eddy current effect on the giant magnetostrictive rod under the excitation of a high-frequency magnetic field and keep the giant magnetostrictive rod to work stably.
Description
Technical Field
The invention belongs to the field of ultrasonic processing, and particularly relates to a giant magnetostrictive ultrasonic transducer.
Background
Due to the change of the magnetization state, the length and the volume of the Material can be greatly changed, that is, the Magnetostrictive Material with a very large magnetostriction coefficient is called Giant Magnetostrictive Material (GMM), and is mostly constructed by rare earth, which is also called rare earth Magnetostrictive Material. The excitation device made of the material, such as an excitation device of Zhejiang university (refer to CN 1836796), a giant magnetostrictive longitudinal-torsional compound vibration ultrasonic transducer of Qinghua university (refer to CN 103203312A) and the like, has the advantages of high conversion rate, high energy density and high response speed.
Disclosure of Invention
The invention provides a giant magnetostrictive ultrasonic transducer which can relieve electric eddy current on a giant magnetostrictive rod under the excitation of a high-frequency magnetic field and heat generated by the electric eddy current.
Which comprises an outer shell, an inner shell, a base and a giant magnetostrictive rod arranged in the inner shell,
a liquid outlet of liquid insulating resin is arranged below the shell;
a liquid inlet of liquid insulating resin is arranged above the inner shell;
the giant magnetostrictive rod is composed of a plurality of giant magnetostrictive slices which are spaced from each other, so that a plurality of channels which are uniformly distributed are formed in the giant magnetostrictive rod;
the upper end of the giant magnetostrictive rod is communicated with the liquid inlet, the lower end of the giant magnetostrictive rod is communicated with the liquid outlet, liquid insulating resin can flow through and fill in a plurality of channels from top to bottom to form an insulating film, the liquid outlet and the liquid inlet are communicated through a valve and a pump outside the energy conversion device to form flowing circulation of the liquid insulating resin, and the valve and the pump are in signal connection with a controller;
the shell is also provided with a current sensor for detecting the actual current value of the energy conversion device during operation;
the inner shell is also provided with a magnetic field intensity sensor for detecting the actual magnetic field intensity in the energy conversion device;
the base is also provided with a temperature sensor for detecting the real-time temperature of the giant magnetostrictive rod;
the controller is configured to:
rate of loss of magnetic field intensity
When the magnetic field intensity is larger than a set value, the valve and the pump are controlled to operate, so that liquid insulating resin is filled in the channel to form an insulating film, the giant magnetostrictive rod is divided into a plurality of giant magnetostrictive slices with small volume to relieve the eddy current effect until the magnetic field intensity loss rate is changed
Is lower than the set value;
when the working temperature of the giant magnetostrictive rod is detected to be higher than a standard value, the pump is controlled to increase the running power, and the flowing speed of the liquid insulating resin in the channel is increased, so that the giant magnetostrictive rod can be subjected to heat absorption and temperature reduction.
The magnetic field intensity loss rate
The calculation method of (2) is as follows:
according to
Calculating the original magnetic field intensity H, wherein N is the number of turns of the coil, I is the actual current value measured by the current sensor,
for the effective magnetic path length, subtracting the actual magnetic field strength measured by the magnetic field strength sensor from the calculated original magnetic field strength H to obtain the magnetic field strength difference
Using magnetic field intensity difference
Dividing by original magnetic field intensity H to obtain magnetic field intensity loss rate
。
Preferably, the opposed faces of each pair of giant magnetostrictive chips are coated with a thin film of polytetrafluoroethylene to reduce the sticking on the surfaces of the giant magnetostrictive chips when the liquid insulating resin flows.
The invention has the beneficial effects that: the invention can relieve the eddy current effect on the giant magnetostrictive rod under the excitation of a high-frequency magnetic field, effectively deals with the heat productivity of the giant magnetostrictive rod caused by the eddy current effect in the working process in a liquid cooling mode, and keeps the stability of the giant magnetostrictive rod in the working process.
Drawings
FIG. 1 shows a schematic diagram of a giant magnetostrictive ultrasonic transducer device;
FIG. 2 shows a schematic of a super magnetostrictive rod.
Detailed Description
The structure of the present system and the functions performed are described in detail below with reference to the accompanying drawings.
A giant magnetostrictive ultrasonic transducer comprises an outer shell 1, an inner shell 2, a base 3 and a giant magnetostrictive rod 4 arranged in the inner shell 2, and is characterized in that,
a liquid outlet 11 of liquid insulating resin is arranged below the shell 1;
a liquid inlet 21 of liquid insulating resin is arranged above the inner shell 2;
the giant magnetostrictive rod 4 is composed of a plurality of giant magnetostrictive slices spaced from each other, thereby forming a plurality of channels 41 uniformly distributed inside the giant magnetostrictive rod;
the upper end of the giant magnetostrictive rod 4 is communicated with the liquid inlet 21, the lower end is communicated with the liquid outlet 11, liquid insulating resin can flow through and fill in a plurality of channels 41 from top to bottom to form an insulating film, the liquid outlet 11 is communicated with the liquid inlet 21 outside the energy conversion device through a valve and a pump (not shown) to form a flowing circulation of the liquid insulating resin, and the valve and the pump are in signal connection with a controller;
the shell 1 is also provided with a current sensor 5 for detecting the actual current value of the energy conversion device during operation;
the inner shell 2 is also provided with a magnetic field intensity sensor 6 for detecting the actual magnetic field intensity in the energy conversion device;
the base 3 is also provided with a temperature sensor 7 for detecting the real-time temperature of the giant magnetostrictive rod;
the controller is configured to:
rate of loss of magnetic field intensity
When the volume of the super magnetostrictive rod is larger than the set value, the valve and the pump are controlled to operate, so that liquid insulating resin is filled in the channel 41 to form an insulating film, and the super magnetostrictive rod is divided into a plurality of super magnetostrictive slices with smaller volume to relieve the eddy current effect;
when the working temperature of the giant magnetostrictive rod is detected to be higher than a standard value, the pump is controlled to increase the operating power, and the flowing speed of the liquid insulating resin in the channel 41 is increased, so that the giant magnetostrictive rod can be subjected to heat absorption and temperature reduction.
It will be appreciated by persons skilled in the art that numerous variations and/or modifications may be made to the invention as shown in the specific embodiments without departing from the spirit or scope of the invention as broadly described. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive. Likewise, the invention encompasses any combination of features, in particular of features in the patent claims, even if this feature or this combination of features is not explicitly specified in the patent claims or in the individual embodiments herein.
Claims (4)
1. A giant magnetostrictive ultrasonic transducer is characterized in that a giant magnetostrictive rod consists of a plurality of giant magnetostrictive slices which are spaced from each other, and liquid insulating resin flows in channels among the slices.
2. A giant magnetostrictive ultrasonic transducer comprises an outer shell, an inner shell, a base and a giant magnetostrictive rod arranged in the inner shell, and is characterized in that,
a liquid outlet of liquid insulating resin is arranged below the shell;
a liquid inlet of liquid insulating resin is arranged above the inner shell;
the giant magnetostrictive rod is composed of a plurality of giant magnetostrictive slices which are spaced from each other, so that a plurality of channels which are uniformly distributed are formed in the giant magnetostrictive rod;
the upper end of the giant magnetostrictive rod is communicated with the liquid inlet, the lower end of the giant magnetostrictive rod is communicated with the liquid outlet, liquid insulating resin can flow through and fill in a plurality of channels from top to bottom to form an insulating film, the liquid outlet and the liquid inlet are communicated through a valve and a pump outside the energy conversion device to form flowing circulation of the liquid insulating resin, and the valve and the pump are in signal connection with a controller;
the shell is also provided with a current sensor for detecting the actual current value of the energy conversion device during operation;
the inner shell is also provided with a magnetic field intensity sensor for detecting the actual magnetic field intensity in the energy conversion device;
the base is also provided with a temperature sensor for detecting the real-time temperature of the giant magnetostrictive rod;
the controller is configured to:
rate of loss of magnetic field intensity
When the volume of the super magnetostrictive rod is larger than a set value, the valve and the pump are controlled to operate, so that liquid insulating resin is filled in the channel to form an insulating film, and the super magnetostrictive rod is divided into a plurality of super magnetostrictive slices with smaller volume to relieve the eddy current effect;
when the working temperature of the giant magnetostrictive rod is detected to be higher than a standard value, the pump is controlled to increase the running power, and the flowing speed of the liquid insulating resin in the channel is increased, so that the giant magnetostrictive rod can be subjected to heat absorption and temperature reduction.
3. The giant magnetostrictive ultrasonic transducer device according to claim 2, wherein the opposed faces of each pair of giant magnetostrictive slices are coated with a teflon film for reducing the sticking on the surfaces of the giant magnetostrictive slices when the liquid insulating resin flows.
4. The giant magnetostrictive ultrasonic transducer device according to claim 2, wherein the magnetic field strength loss rate
The calculation method of (2) is as follows:
according to
Calculating the original magnetic field intensity H, wherein N is the number of turns of the coil, I is the actual current value measured by the current sensor,
for the effective magnetic path length, subtracting the actual magnetic field strength measured by the magnetic field strength sensor from the calculated original magnetic field strength H to obtain the magnetic field strength difference
Using magnetic field intensity difference
Dividing by original magnetic field intensity H to obtain magnetic field intensity loss rate
。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910153641.3A CN109877029B (en) | 2019-03-01 | 2019-03-01 | Giant magnetostrictive ultrasonic transducer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910153641.3A CN109877029B (en) | 2019-03-01 | 2019-03-01 | Giant magnetostrictive ultrasonic transducer |
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| Publication Number | Publication Date |
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| CN109877029A CN109877029A (en) | 2019-06-14 |
| CN109877029B true CN109877029B (en) | 2020-10-16 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2853195Y (en) * | 2005-09-17 | 2007-01-03 | 陈国超 | High power altrasonic transducer |
| CN107470117A (en) * | 2017-08-04 | 2017-12-15 | 北京交通大学 | A kind of ultra-magnetic telescopic ultrasonic driver with heat-pipe radiator |
| CN107965311A (en) * | 2016-10-19 | 2018-04-27 | 北京紫贝龙科技股份有限公司 | Sonic sensor, acoustic logging instrument and logging method |
| CN108568397A (en) * | 2018-03-26 | 2018-09-25 | 西安理工大学 | Ultra-magnetic telescopic ultrasonic chief axis |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2438403B (en) * | 2006-05-25 | 2011-02-23 | Viktor Fedorovych Dekhtiaruk | Manufacture of biodiesel |
-
2019
- 2019-03-01 CN CN201910153641.3A patent/CN109877029B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2853195Y (en) * | 2005-09-17 | 2007-01-03 | 陈国超 | High power altrasonic transducer |
| CN107965311A (en) * | 2016-10-19 | 2018-04-27 | 北京紫贝龙科技股份有限公司 | Sonic sensor, acoustic logging instrument and logging method |
| CN107470117A (en) * | 2017-08-04 | 2017-12-15 | 北京交通大学 | A kind of ultra-magnetic telescopic ultrasonic driver with heat-pipe radiator |
| CN108568397A (en) * | 2018-03-26 | 2018-09-25 | 西安理工大学 | Ultra-magnetic telescopic ultrasonic chief axis |
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| CN109877029A (en) | 2019-06-14 |
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Denomination of invention: Giant magnetostrictive ultrasonic energy exchange device Effective date of registration: 20211216 Granted publication date: 20201016 Pledgee: Zhejiang Hecheng Rural Commercial Bank Co.,Ltd. Pledgor: JIAXING QUANSHUN TOURIST PRODUCT Co.,Ltd. Registration number: Y2021330002555 |
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Date of cancellation: 20230404 Granted publication date: 20201016 Pledgee: Zhejiang Hecheng Rural Commercial Bank Co.,Ltd. Pledgor: JIAXING QUANSHUN TOURIST PRODUCT Co.,Ltd. Registration number: Y2021330002555 |
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Effective date of registration: 20231211 Address after: Room 101, No. 10, Lane 1, Nanzha Xinxing Road, Humen Town, Dongguan City, Guangdong Province, 523000 Patentee after: Guangdong Microcrystalline Machinery Technology Co.,Ltd. Address before: 314000 Yunan Village, Yuxin Town, Jiaxing City, Zhejiang Province Patentee before: JIAXING QUANSHUN TOURIST PRODUCT Co.,Ltd. |