CN105304256A - Magnetic conductive paste for connecting magnetic circuits of detachable current transformers and current comparers - Google Patents
Magnetic conductive paste for connecting magnetic circuits of detachable current transformers and current comparers Download PDFInfo
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- CN105304256A CN105304256A CN201510677943.2A CN201510677943A CN105304256A CN 105304256 A CN105304256 A CN 105304256A CN 201510677943 A CN201510677943 A CN 201510677943A CN 105304256 A CN105304256 A CN 105304256A
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Abstract
The invention discloses a magnetic conductive paste for connecting magnetic circuits of detachable current transformers and current comparers. The basic formula system is as follows: medical vaseline of which the kinematic viscosity is greater than 8 sq.mm/s or the cone penetration is 130-180 at 100 DEG C is used as a basal body, high-conductivity magnet nickel alloy powder with the grain size of 150-400 meshes is used as a functional filler, and the volume ratio of the formula is controlled between 1: 0.85 and 1: 50. The magnetic conductive paste can effectively solve the problem that the magnetic circuits of detachable current transformers and current comparers are poor in butt joint to cause low sensitivity.
Description
Technical field
The present invention relates to a kind of detachable type current transformer and current comparator magnetic circuit connection magnetic conduction ointment, especially relate to one and be applicable to on-the-spot detachable type current transformer and dock auxiliary material with current comparator magnetic circuit.
Background technology
In the process of construction of intelligent grid, often run into and the auxiliary detection of upgrading increase and monitoring system are carried out to original power equipment or circuit, thus improve the intelligent level of power equipment and electrical network.And in the auxiliary detection of setting up and monitoring system, magneto-electric current sensor occupies larger proportion, as straight-through current transformer and current comparator etc.
The basic composition of electromagnetic current transducer and current comparator comprises magnetic circuit (iron core) and coil (measuring winding and ratio winding etc.).In order to meet, original circuit and equipment be transformed, current transformer and current comparator can be dismantled at any time under often needing field condition, and detachable current transformer must be docked by two parts with the iron core of current comparator and forming closed magnetic circuit.Because core material is hard material, often run into the imprecise problem of contact at docking port place, thus cause magnetic circuit reluctance greatly to increase, current transformer and current comparator measuring accuracy decline greatly.
The method reducing the magnetic resistance at current transformer and current comparator iron core docking port place mainly takes appropriate measures in structural design, but this method increase the manufacturing cost of equipment, and still can not get rid of field-mounted process uncontrollable factor and cause docking not tight problem.
Summary of the invention
In order to solve the problems of the technologies described above, the invention provides a kind of detachable type current transformer and current comparator magnetic circuit connection magnetic conduction ointment.
In order to achieve the above object, the technical solution adopted in the present invention is:
Detachable type current transformer is connected with current comparator magnetic circuit uses magnetic conduction ointment, basic recipe system is: be greater than 8mm2/s or the cone penetration medical ventolin at 130-180 for matrix with 100 DEG C of kinematic viscosity, take particle diameter as 150-400 object hyperloy powder be functional stuffing, formula controls by volume between 1:0.85 to 1:50.
The relative permeability of magnetic conduction ointment is greater than 4, and viscosity is not more than 4mm2/s.
The preparation of magnetic conduction ointment adopts mechanical blending preparation technology.
The beneficial effect that the present invention reaches: 1, the present invention effectively can solve detachable current transformer and the docking of current comparator magnetic circuit is tight, causes sensitive low problem; 2, the present invention adopts medical ventolin to be nontoxic, tasteless environment-friendly type soft material, prepares magnetic conduction ointment, preparation method is simple, cost is low, stable performance with Alperm powder mechanical blending; 3, invention not only can be applicable to the iron core connections such as on-the-spot detachable type current transformer and current comparator, and the magnetic circuit that also can be used for other similar devices connects.
Embodiment
Following examples only for technical scheme of the present invention is clearly described, and can not limit the scope of the invention with this.
Detachable type current transformer is connected with current comparator magnetic circuit uses magnetic conduction ointment, basic recipe system is: be greater than 8mm2/s or the cone penetration medical ventolin at 130-180 for matrix with 100 DEG C of kinematic viscosity, take particle diameter as 150-400 object hyperloy powder be functional stuffing, formula controls by volume between 1:0.85 to 1:50.
Above-mentioned magnetic conduction ointment preparation adopts mechanical blending preparation technology, and the relative permeability of the magnetic conduction ointment prepared is greater than 4, and viscosity is not more than 4mm2/s.
Above-mentioned magnetic conduction ointment is selected to be greater than 8mm2/s or the cone penetration medical ventolin at 130-180 for matrix with 100 DEG C of kinematic viscosity.This medical ventolin is the vaseline that viscosity is lower, to ensure that prepared magnetic conduction ointment has good mobility, magnetic circuit joint gap can be made minimum as far as possible, and can supplant the air gap of joint under certain mechanical compaction power effect; Medical ventolin is widely used in the raw material of skin type product simultaneously, and the Petroleum refining come goes out low molecular hydrocarbon petrolatum, is the environment-friendly type soft material that raw material sources is extensive, cost is low, nontoxic, tasteless.
Above-mentioned magnetic conduction ointment selection is 150-400 object hyperloy powder with particle diameter is functional stuffing.150-400 object hyperloy powder is widely used in magnetic powder brake and fracture detection by magnetic powder field, is commercially easy to obtain.
The high magnetic permeability improving ointment of magnetic concentration, but due to poor fluidity, when connecting for magnetic circuit, easily form thicker articulamentum, and then increase the magnetic resistance of whole magnetic circuit.Magnetic concentration is low, although have good mobility, forms thinner articulamentum when magnetic circuit connects, and can not obtain desirable magnetic circuit connection effect equally to magnetic permeability is too low.Therefore, above-mentioned magnetic conduction ointment selection base-material (medical ventolin) and filler (hyperloy powder) volume ratio as formula range, have taken into account mobility and the magnetic permeability of ointment from 1:0.85 to 1:1.50.
Embodiment one:
Selection cone penetration is 130, colourity is that the commercially available medical albolene of 30 is as base-material; Select that relative permeability is greater than 1500, particle diameter be 150 object commercially available iron nickel magnetic is filler; Equal 1:0.85 by volume to fill a prescription, adopt churned mechanically method to prepare magnetic conduction ointment.At ambient temperature 27 DEG C, test magnetic permeability and the viscosity of magnetic conduction ointment, test result is relative permeability 4.01, viscosity 3.26mm
2/ s.
Embodiment two:
Selection cone penetration is 135, colourity is that the commercially available medical albolene of 30 is as base-material; Select that relative permeability is greater than 1500, particle diameter be 150 object commercially available iron nickel magnetic is filler; Equal 1:1 by volume to fill a prescription, adopt churned mechanically method to prepare magnetic conduction ointment.At ambient temperature 27 DEG C, test magnetic permeability and the viscosity of magnetic conduction ointment, test result is relative permeability 4.37, viscosity 3.64mm
2/ s.
Embodiment three:
Selection cone penetration is 135, colourity is that the commercially available medical albolene of 30 is as base-material; Select that relative permeability is greater than 1500, particle diameter be 250 object commercially available iron nickel magnetic is filler; Equal 1:1.2 by volume to fill a prescription, adopt churned mechanically method to prepare magnetic conduction ointment.At ambient temperature 27 DEG C, test magnetic permeability and the viscosity of magnetic conduction ointment, test result is relative permeability 4.56, viscosity 3.83mm
2/ s.
Embodiment four:
Selection cone penetration is 155, colourity is that the commercially available medical albolene of 30 is as base-material; Select that relative permeability is greater than 1500, particle diameter be 250 object commercially available iron nickel magnetic is filler; Equal 1:1.5 by volume to fill a prescription, adopt churned mechanically method to prepare magnetic conduction ointment.At ambient temperature 27 DEG C, test magnetic permeability and the viscosity of magnetic conduction ointment, test result is relative permeability 5.36, viscosity 3.13mm
2/ s.
Embodiment five:
It is 180 that cone penetration is surveyed in choosing, and colourity is that the commercially available medical yellow petroleum jelly of 45 is as base-material; Select that relative permeability is greater than 1500, particle diameter be 250 object commercially available iron nickel magnetic is filler; Equal 1:1.3 by volume to fill a prescription, adopt churned mechanically method to prepare magnetic conduction ointment.At ambient temperature 27 DEG C, test magnetic permeability and the viscosity of magnetic conduction ointment, test result is relative permeability 4.39, viscosity 3.73mm
2/ s.
Embodiment six:
It is 180 that cone penetration is surveyed in choosing, and colourity is that the commercially available medical yellow petroleum jelly of 45 is as base-material; Select that relative permeability is greater than 1500, particle diameter be 400 object commercially available iron nickel magnetic is filler; Equal 1:2.0 by volume to fill a prescription, adopt churned mechanically method to prepare magnetic conduction ointment.At ambient temperature 27 DEG C, test magnetic permeability and the viscosity of magnetic conduction ointment, test result is relative permeability 5.23, viscosity 2.17mm
2/ s.
A kind of magnetic conduction ointment prepared in any selection Chinese fir execution mode, as magnetic conduction ointment prepared by execution mode four.Its sensitivity tested by on-the-spot detachable current comparator when not adopting magnetic conduction ointment be 0.25mV/A, and adopt magnetic conduction ointment to be coated in magnetic circuit docking end, by mechanical presses, then test stream is 1.75mV/A than device sensitivity, and sensitivity improves 7 times.
In sum, above-mentioned magnetic conduction ointment effectively can solve detachable current transformer and the docking of current comparator magnetic circuit is not tight, causes sensitive low problem.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the prerequisite not departing from the technology of the present invention principle; can also make some improvement and distortion, these improve and distortion also should be considered as protection scope of the present invention.
Claims (3)
1. detachable type current transformer is connected with current comparator magnetic circuit and uses magnetic conduction ointment, it is characterized in that: basic recipe system is: be greater than 8mm2/s or the cone penetration medical ventolin at 130-180 for matrix with 100 DEG C of kinematic viscosity, take particle diameter as 150-400 object hyperloy powder be functional stuffing, formula controls by volume between 1:0.85 to 1:50.
2. detachable type current transformer according to claim 1 is connected with current comparator magnetic circuit and uses magnetic conduction ointment, it is characterized in that: the relative permeability of magnetic conduction ointment is greater than 4, and viscosity is not more than 4mm2/s.
3. detachable type current transformer according to claim 1 and 2 is connected with current comparator magnetic circuit and uses magnetic conduction ointment, it is characterized in that: the preparation of magnetic conduction ointment adopts mechanical blending preparation technology.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510677943.2A CN105304256B (en) | 2015-10-19 | 2015-10-19 | Detachable type current transformer connects with current comparator magnetic circuit uses magnetic conduction ointment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510677943.2A CN105304256B (en) | 2015-10-19 | 2015-10-19 | Detachable type current transformer connects with current comparator magnetic circuit uses magnetic conduction ointment |
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| CN105304256A true CN105304256A (en) | 2016-02-03 |
| CN105304256B CN105304256B (en) | 2018-02-09 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050045850A1 (en) * | 2003-08-25 | 2005-03-03 | Ulicny John C. | Oxidation-resistant magnetorheological fluid |
| CN1962783A (en) * | 2006-11-06 | 2007-05-16 | 南昌大学 | Process for preparing amorphous nano-crystalline magnetic powder magnetic-conductive adhesive |
| CN101462173A (en) * | 2009-01-16 | 2009-06-24 | 武汉理工大学 | Method for preparing nano complex particle for highly conductive and magnetic electro-magnetic screen |
| CN102737803A (en) * | 2012-06-29 | 2012-10-17 | 中国科学技术大学 | Phase change type magnetorheological material and preparation method thereof |
| CN102916002A (en) * | 2012-10-16 | 2013-02-06 | 刘伟德 | Semiconductor packaging device with magnetic shielding function and production method thereof |
-
2015
- 2015-10-19 CN CN201510677943.2A patent/CN105304256B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050045850A1 (en) * | 2003-08-25 | 2005-03-03 | Ulicny John C. | Oxidation-resistant magnetorheological fluid |
| CN1962783A (en) * | 2006-11-06 | 2007-05-16 | 南昌大学 | Process for preparing amorphous nano-crystalline magnetic powder magnetic-conductive adhesive |
| CN101462173A (en) * | 2009-01-16 | 2009-06-24 | 武汉理工大学 | Method for preparing nano complex particle for highly conductive and magnetic electro-magnetic screen |
| CN102737803A (en) * | 2012-06-29 | 2012-10-17 | 中国科学技术大学 | Phase change type magnetorheological material and preparation method thereof |
| CN102916002A (en) * | 2012-10-16 | 2013-02-06 | 刘伟德 | Semiconductor packaging device with magnetic shielding function and production method thereof |
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| CN105304256B (en) | 2018-02-09 |
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