CN205749858U - Magnetic flux test device under extreme temperature - Google Patents
Magnetic flux test device under extreme temperature Download PDFInfo
- Publication number
- CN205749858U CN205749858U CN201620576299.XU CN201620576299U CN205749858U CN 205749858 U CN205749858 U CN 205749858U CN 201620576299 U CN201620576299 U CN 201620576299U CN 205749858 U CN205749858 U CN 205749858U
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- temperature
- magnetic flux
- test
- test device
- connecting cylinder
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Abstract
The utility model discloses the magnetic flux test device under a kind of extreme temperature, can be used for the magnetic flux test of permanent magnetism sample, its structure includes connecting cylinder, specimen holder and helmholtz coil etc., mainly temperature-controlled cabinet is set up in the connecting cylinder one end being used for magnetic flux test, so that temperature regulation and magnetic flux test set are integral, also the composition structure of connecting cylinder is improved, so that magnetic flux tests the impact of not tested person variations in temperature, it is ensured that the stability of test temperature and the accuracy of test signal；Meanwhile, thermocouple and Research on Automatic Measuring System of Temperature that extension circuit connects are gone back, to monitor sample temperature in real time.This magnetic flux test device can under controlled temperature conditions, i.e. carry out the accurate test of magnetic flux under the extreme temperature of high temperature or low temperature to magnetic material, and can also do not change sample relative to position in the case of carry out in-situ high temperature flux decay test, test process is quick, safety, result accurately, reliably, therefore greatly facilitates popularization and application.
Description
Technical field
This utility model relates to a kind of magnetic flux for permanent magnetism sample and tests device, specifically refers to the magnetic flux under extreme temperature
Test device.
Background technology
Permanent magnet material is applied to the fields such as motor, automobile, wind-powered electricity generation, aviation, consumer electronics more and more widely, these application
Occasion is generally the highest to magnetic flux (magnetic moment) coherence request of permanent magnet material, so the magnetic flux (magnetic moment) under room temperature becomes the most
The project must examined for industry, the most at room temperature utilizes helmholtz coil and fluxmeter to carry out magnetic flux (magnetic moment) test, this
Also it is one of method of testing the most frequently used in magnetic material industry.But, in fields such as wind-powered electricity generation, air-conditioning, automobiles, product is toward contact
Needing in the face of the bad working environments such as high temperature, low temperature tests, in order to reduce the impact of temperature, people generally go to select some magnetic temperatures
Coefficient is tried one's best little material, this strongly limits production application and cost control.If permanent magnet material can be recorded accurately, easily
Magnetic flux (magnetic moment) at different temperatures, can provide for the design of new product undoubtedly and more directly help.
At present, few to permanent magnetism sample original position magnetic detection under the conditions of high and low temperature, magnetic the most at low temperatures is surveyed
The small sample research that examination is often only limitted in laboratory, such as, utilize vibration that is expensive and that be only suitable for testing small sample
The equipment such as sample magnetometer, superconducting quantum interference device (SQUID), this also has the most different from the magnetic material in actual product, by direct shadow
Ring the design to industrial products and the utilization of resources.Manufacturing enterprise often, can only hold such as 130 DEG C according to magnetic material high-temperature process
Continue time 1h, or the flux decay percentage ratio before and after high and low temperature impact test infer the performance loss in product actual condition,
Cumbersome, result is not accurate enough, reliable, it is also difficult to effectively popularization and application.
Summary of the invention
Technical problem to be solved in the utility model is to overcome the defect of prior art and provides the one can be at temperature control
Under the conditions of, i.e. under the extreme temperature of high temperature or low temperature, magnetic material is carried out the accurate test of magnetic flux, test process is quick, result
Accurately, reliable magnetic flux test device.
Technical problem of the present utility model is achieved through the following technical solutions:
Magnetic flux test device under a kind of extreme temperature, is arranged in connecting cylinder including connecting cylinder and axially moving horizontally
Specimen holder；Described connecting cylinder is externally provided with the helmholtz coil of suit and coordinates the magnetic of helmholtz coil test magnetic flux signal
Amount to；Described specimen holder one end equipped with sample, this sample by specimen holder drive and into and out of helmholtz coil center, described
Magnetic flux test device also include that temperature-controlled cabinet, described connecting cylinder are connected to outside temperature-controlled cabinet, this connecting cylinder be by
Thermal insulation packing layer that heat pipe, circumference are coated on outside heat pipe and the insulation insulated shell structure that circumference is coated on outside thermal insulation packing layer
Become；Described heat pipe disjunctor extends in temperature-controlled cabinet；Described specimen holder axially moves horizontally and is arranged in heat pipe,
Being additionally provided with the thermocouple being positioned at helmholtz coil center in heat pipe, this thermocouple circuit connects Research on Automatic Measuring System of Temperature.
Described heat pipe is pure copper tube, and thermal insulation packing layer is adiabatic foam sponge layer, and insulation insulated shell is hard heat-insulated
Skeleton or high-temperature heat insulation ceramic fibre.
Described disjunctor extends to the heat pipe in temperature-controlled cabinet and is provided with densely covered heat exchange pore.
It is provided with heating in described temperature-controlled cabinet and produces resistance wire and the list of refrigeration generation low temperature environment of hot environment
Unit's compressor.
Described specimen holder is the teflon rod of temp. variation resistant, described helmholtz coil be enamel covered wire coiling and
Become.
Described extreme temperature refers to-40 DEG C ~ 150 DEG C.
Described connecting cylinder end arranges insulation capping, and this insulation capping is provided with through wires hole.
Described specimen holder axially moving horizontally in heat pipe, specimen holder is not installed the other end of sample and is run through temperature
Degree control chamber exposes, and this exposed junction is set to Non-follow control or Electronic control made by servomotor.
Compared with prior art, the connecting cylinder one end being used for magnetic flux test is mainly additionally arranged temperature control by this utility model
Case processed, so that temperature regulation and magnetic flux test set are integral, and also is improved the composition structure of connecting cylinder, with
Make magnetic flux test the impact of not tested person variations in temperature, both ensure that the stability of test temperature, in turn ensure that test signal
Accuracy；Meanwhile, thermocouple and Research on Automatic Measuring System of Temperature that circuit connects also it are additionally arranged, to monitor sample temperature in real time.After improvement
Magnetic flux test device can under controlled temperature conditions, i.e. carry out the essence of magnetic flux under the extreme temperature of high temperature or low temperature to magnetic material
Really test, and can also do not change sample relative to position in the case of carry out in-situ high temperature flux decay test, test process
Quickly, safety, result accurately, reliable, therefore greatly facilitate popularization and application.
Accompanying drawing explanation
Fig. 1 is axial sectional structure schematic diagram of the present utility model.
Fig. 2 is the A A sectional view of Fig. 1.
Detailed description of the invention
By above-mentioned accompanying drawing, this utility model embodiment will be elaborated again below.
As shown in Figure 1 and Figure 2,1. connecting cylinder, 11. heat pipes, 111. heat exchange pores, 12. thermal insulation packing layer, 13. insulations
Insulated shell, 2. helmholtz coil, 3. sample, 4. thermocouple, 5. insulation capping, 6. Research on Automatic Measuring System of Temperature, 7. temperature-controlled cabinet,
8. specimen holder.
Magnetic flux test device under extreme temperature, as it is shown in figure 1, relate to a kind of magnetic flux of permanent magnetism sample under extreme temperature
(magnetic moment) test device, it is also the ideal equipment of detection permanent magnet material high temperature flux decay.Wherein, extreme temperature refers to-40
DEG C ~ 150 DEG C, magnetic flux test device structure mainly include connecting cylinder 1, temperature-controlled cabinet 7, specimen holder 8, helmholtz coil 2,
Thermocouple 4 and Research on Automatic Measuring System of Temperature 6 etc..
Described connecting cylinder 1 is multiple structure cylindrical drum as shown in Figure 2, is by leading successively according to order from inside to outside
Thermal insulation packing layer 12 that heat pipe 11, circumference are coated on outside heat pipe and the insulation insulated shell 13 that circumference is coated on outside thermal insulation packing layer
Constitute；Described connecting cylinder 1 is externally provided with the helmholtz coil 2 of suit, i.e. connecting cylinder 1 and has to pass through helmholtz coil 2, should
Helmholtz coil is the one-dimensional helmholtz coil of enamel covered wire coiling, it is possible to expand to three-dimensional helmholtz coil,
It is additionally provided with the fluxmeter coordinating helmholtz coil 2 to test magnetic flux signal, therefore helmholtz coil 2 and fluxmeter together constitute
The magnetic flux test cell of magnetic flux test device.
Described connecting cylinder 1 one end be fixedly connected on outside temperature-controlled cabinet 7 preset installing hole in, connecting cylinder 1 another
The end of end arranges insulation capping and 5 closes, and this insulation capping is provided with through wires hole and is available for wire and passes；Described temperature control
It is provided with heating in case 7 processed and produces resistance wire and the cell compression machine of refrigeration generation low temperature environment of hot environment, and use advanced person
BTHC temperature control method, temperature-controlled precision and stability are less than 0.5 DEG C；Described connecting cylinder 1 and temperature-controlled cabinet 7 main composition magnetic
The thermostat unit of logical test device.
Described heat pipe 11 disjunctor extends in temperature-controlled cabinet 7, and extends to temperature-controlled cabinet 7 outside another
Being fixed installation in the installing hole preset, therefore a part for heat pipe 11 is arranged on outside temperature-controlled cabinet 7, another part sets
Put in temperature-controlled cabinet 7, the heat pipe 11 be positioned at temperature-controlled cabinet is provided with densely covered heat exchange pore 111, so that
Sufficient heat exchange and thermal convection current is possessed between heat pipe 11 and temperature-controlled cabinet 7.
Described heat pipe 11 uses the pure copper tube manufacture of good heat conductivity, in order to the temperature in temperature-controlled cabinet 7 passes
It is directed on the sample 3 in heat pipe 11；Described thermal insulation packing layer 12 and insulation insulated shell 13 mainly use the material that thermal insulation is good
Material is made, and can be used for preventing producing thermal convection current with extraneous, and this thermal insulation packing layer 12 is adiabatic foam sponge layer, and at heat pipe
11 positions contacted with preservation and controlling case 7 are required for arranging thermal insulation packing layer 12, as shown in Figure 1 temperature-controlled cabinet 7 both sides quilt
All need in the installing hole that heat pipe 11 runs through to fill thermal insulation packing layer 12；This insulation insulated shell 13 is divided according to the difference of test temperature
Be two kinds, respectively under cryogenic conditions under test and the hard heat-insulated skeleton selected and hot conditions test and the high temperature selected is exhausted
Thermal Ceramics fiber.
Described specimen holder 8 is arranged in heat pipe 11, and this specimen holder 8 uses the teflon rod of temp. variation resistant, one
End, i.e. left end shown in Fig. 1 are provided with permanent magnet material sample 3, and the specimen holder other end, i.e. right-hand member shown in Fig. 1 are along heat pipe 11 always
Running through temperature-controlled cabinet 7 and expose, this exposed junction is set to Non-follow control or Electronic control made by servomotor, and manually or electricity
Dynamic and realize specimen holder 8 axially moving horizontally in heat pipe 11, therefore operated manually or electrically make axially to move horizontally
Specimen holder 8 constitutes the sample transfer unit of magnetic flux test device.
Drive that described sample 3 is axially moved horizontally by specimen holder 8 and into and out of helmholtz coil 2 center, and also
Need to guarantee that the flow direction of sample 3 is vertical with helmholtz coil 2, now can record the flux value of sample 3.
Being provided with the thermocouple 4 being positioned at helmholtz coil 2 center in described heat pipe 11, this thermocouple is worn by wire
Go out the through wires hole in insulation capping 5 and carry out circuit with the Research on Automatic Measuring System of Temperature 6 being arranged on the external world and be connected, the installation of thermocouple 4
Position needs, near the sample 3 entering helmholtz coil 2 center, can be supervised in real time by thermocouple 4 and Research on Automatic Measuring System of Temperature 6
Control sample 3 temperature, therefore thermocouple 4 and Research on Automatic Measuring System of Temperature 6 together constitute the sample temperature test cell of magnetic flux test device.
This utility model can carry out magnetic flux test under extreme temperature, and the high temperature magnetic flux that also can detect permanent magnet material declines
Subtract, describe in detail below by way of two embodiments.
Embodiment 1
Test permanent magnet material sample flux value under-40 DEG C of low temperature:
Building magnetic flux test device, insulation insulated shell 13 uses hard heat-insulated skeleton, sample 3 is fixed on specimen holder 8 one
End, and guarantee that flow direction is parallel with helmholtz coil 2, then by specimen holder 8, sample 3 is moved to helmholtz coil
The center of 2, temperature-controlled cabinet 7 produces low temperature environment by cell compression mechanism cold, by thermocouple 4 and temperature test system
System 6 detection sample temperatures, wait that sample temperature is stable to make zero the registration of fluxmeter after-40 DEG C, manually or electronic and fast
Speed axially level pulls specimen holder 8 to drive sample 3 away from helmholtz coil 2, and recording flux meter reading, at obtaining-40 DEG C
The flux value of sample；Then repeat some times of above step, the sample flux value that can accurately obtain under cryogenic conditions of averaging.
Embodiment 2
Test the flux decay rate that Nd-Fe-B permanent magnet material sample is at 130 DEG C
Building magnetic flux test device, insulation insulated shell 13 uses high-temperature heat insulation ceramic fibre, sample 3 is fixed on specimen holder
8 one end, and guarantee that flow direction is parallel with helmholtz coil 2, then by specimen holder 8, sample 3 is moved to last of the twelve Earthly Branches nurse hertz
The center of coil 2, records flux value A under room temperature by pull specimen holder 8, and records temperature value；Temperature-controlled cabinet 7 passes through
Resistant heating produces hot environment, detects sample temperature by thermocouple 4 and Research on Automatic Measuring System of Temperature 6, waits sample temperature stable
At 130 DEG C, keeping 130 DEG C after 2 hours, reduce the temperature to the room temperature of first record, test obtains flux value B, then magnetic again
Logical attenuation rate=(A-B)/A × 100%, can accurately obtain the sample magnetic flux attenuation rate under hot conditions.
This utility model can be at simulation actual environment, i.e. just can carry out the accurate of magnetic flux (magnetic moment) without carrying out evacuation
Test, especially can obtain the magnetic parameters such as magnetic flux (magnetic moment) under extreme low temperature and thermal extremes fast and accurately, and have
Safety, the feature such as it is suitable for, has and well promote and practical value, also can produce good economic benefit and social benefit.
The above is only specific embodiment of the utility model, it should be appreciated by those skilled in the art that any and this reality
Execute the structure design of example equivalent, within should be included in protection domain of the present utility model.
Claims (8)
1. the test of the magnetic flux under an extreme temperature device, including connecting cylinder (1) with axially move horizontally and be arranged on connecting cylinder (1)
Interior specimen holder (8)；Described connecting cylinder (1) is externally provided with the helmholtz coil (2) of suit and coordinates helmholtz coil to survey
The fluxmeter of examination magnetic flux signal；Described specimen holder (8) one end equipped with sample (3), this sample driven by specimen holder (8) and enter,
Go out helmholtz coil (2) center, it is characterised in that described magnetic flux test device also includes temperature-controlled cabinet (7), described
Connecting cylinder (1) is connected to temperature-controlled cabinet (7) outside, and this connecting cylinder (1) is to be coated on outside heat pipe by heat pipe (11), circumference
Thermal insulation packing layer (12) and the insulation insulated shell (13) that is coated on outside thermal insulation packing layer of circumference constitute；Described heat pipe (11)
Disjunctor extends in temperature-controlled cabinet (7)；Described specimen holder (8) axially moves horizontally and is arranged in heat pipe (11), is leading
Being additionally provided with the thermocouple (4) being positioned at helmholtz coil (2) center in heat pipe, this thermocouple circuit connects Research on Automatic Measuring System of Temperature
(6).
Magnetic flux test device under extreme temperature the most according to claim 1, it is characterised in that described heat pipe (11)
For pure copper tube, thermal insulation packing layer (12) is adiabatic foam sponge layer, insulation insulated shell (13) be hard heat-insulated skeleton or high temperature exhausted
Thermal Ceramics fiber.
Magnetic flux test device under extreme temperature the most according to claim 1 and 2, it is characterised in that described disjunctor extends
Heat pipe (11) to temperature-controlled cabinet (7) is provided with densely covered heat exchange pore (111).
Magnetic flux test device under extreme temperature the most according to claim 1, it is characterised in that described temperature-controlled cabinet
(7) it is provided with heating in and produces resistance wire and the cell compression machine of refrigeration generation low temperature environment of hot environment.
Magnetic flux test device under extreme temperature the most according to claim 1, it is characterised in that described specimen holder (8) is
The teflon rod of temp. variation resistant, described helmholtz coil (2) is that enamel covered wire coiling forms.
Magnetic flux test device under extreme temperature the most according to claim 1, it is characterised in that described extreme temperature is
Refer to-40 DEG C ~ 150 DEG C.
Magnetic flux test device under extreme temperature the most according to claim 1, it is characterised in that described connecting cylinder (1) end
Portion arranges insulation capping (5), and this insulation capping is provided with through wires hole.
Magnetic flux test device under extreme temperature the most according to claim 1, it is characterised in that described specimen holder (8) exists
Axially moving horizontally in heat pipe (11) is that specimen holder (8) is not installed the other end of sample (3) and run through temperature-controlled cabinet (7) outward
Dew, this exposed junction is set to Non-follow control or Electronic control made by servomotor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620576299.XU CN205749858U (en) | 2016-06-13 | 2016-06-13 | Magnetic flux test device under extreme temperature |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620576299.XU CN205749858U (en) | 2016-06-13 | 2016-06-13 | Magnetic flux test device under extreme temperature |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205749858U true CN205749858U (en) | 2016-11-30 |
Family
ID=57385906
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620576299.XU Withdrawn - After Issue CN205749858U (en) | 2016-06-13 | 2016-06-13 | Magnetic flux test device under extreme temperature |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205749858U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105974341A (en) * | 2016-06-13 | 2016-09-28 | 宁波市计量测试研究院（宁波市衡器管理所） | Magnetic flux testing device at extreme air temperature |
-
2016
- 2016-06-13 CN CN201620576299.XU patent/CN205749858U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105974341A (en) * | 2016-06-13 | 2016-09-28 | 宁波市计量测试研究院（宁波市衡器管理所） | Magnetic flux testing device at extreme air temperature |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20161130 Effective date of abandoning: 20190416 |