CN104242489B - Neodymium iron boron permanent magnet temperature compensation material for wind driven generator or permanent magnetic engine - Google Patents
Neodymium iron boron permanent magnet temperature compensation material for wind driven generator or permanent magnetic engine Download PDFInfo
- Publication number
- CN104242489B CN104242489B CN201410509792.5A CN201410509792A CN104242489B CN 104242489 B CN104242489 B CN 104242489B CN 201410509792 A CN201410509792 A CN 201410509792A CN 104242489 B CN104242489 B CN 104242489B
- Authority
- CN
- China
- Prior art keywords
- permanent magnet
- metal shell
- driven generator
- wind
- iron boron
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Abstract
The invention discloses a neodymium iron boron permanent magnet temperature compensation material for a wind driven generator or a permanent magnetic engine. The neodymium iron boron permanent magnet temperature compensation material is characterized in that the material comprises a neodymium iron boron permanent magnet body,and a metal shell coats the neodymium iron boron permanent magnet body and is composed of 60-75% of Fe and 25-40% of Ni. The neodymium iron boron permanent magnet temperature compensation material has the advantages that magnetic stability and freeness of demagnetizing of a permanent magnet in high-temperature environment can be effectively ensured to maintain continuous power generating capacity of the wind driven generator, the material is little in environment pollution and simple to process, and cost is lowered.
Description
Technical field
The present invention relates to a kind of technical field of wind power generator, and in particular to a kind of wind-driven generator or permanent magnet motor are used
Nd-Fe-B permanent magnet temperature-compensating material or referred to as wind-driven generator or permanent magnet motor temperature-compensating Nd-Fe-B permanent magnet.
Background technology
Nd-Fe-B permanent magnet in wind-driven generator or permanent magnet motor, due to use environment harshness, it is desirable to permanent magnet
It is good with magnetic temperature stability, magnetic does not drop under hot environment, to maintain wind-driven generator to continue generating capacity.
The permanent magnet of prior art, because in prolonged power generation process, temperature can be gradually stepped up, or even can be lifted
High temperature as 80-100 DEG C, at present under such hot environment, magnetic significantly declines the permanent magnet of application, so as to serious
The stability of wind-driven generator operating is affected, generated output is reduced.
Additionally, the Nd-Fe-B permanent magnet in the wind-driven generator for using at present, in order to prevent permanent magnet surfaces from corroding or
Scratch, often one layer of single coat of metal is plated in Nd-Fe-B permanent magnetic external surface using electrochemistry electro-plating method, but it is this
Often there is the following deficiency in technique：1. because electroless plating process contamination is big, to discharge heavy metal waste liquid, environment is caused
Tremendous influence and destruction；2. electroless plating process power consumption is big, high energy consumption, substantially increases production cost；3. due to being in neodymium
Iron boron permanent magnetism external surface plates layer of metal protective layer, and the hardness and intensity of the coat of metal are not too preferable, still can
The defect of surface tear is caused, once scratch, in addition it is also necessary to repetition is electroplated or removal electrodeposited coating is done over again again reprocessing, whole process work
Skill is complicated, intractability is big, greatly improves the cost of enterprise.
The content of the invention
Above-mentioned deficiency of the present invention for prior art, there is provided a kind of that permanent magnet magnetic in high temperature environments can be effectively ensured
Stability, magnetic does not drop to maintain wind-driven generator to continue generating capacity, and environmental pollution is little, processing is simple, the wind of reduces cost
Power generator or permanent magnet motor Nd-Fe-B permanent magnet temperature-compensating material.
In order to solve above-mentioned technical problem, the technical solution used in the present invention is：A kind of wind-driven generator or permanent-magnet electric
Machine Nd-Fe-B permanent magnet temperature-compensating material, the material includes：Nd-Fe-B permanent magnet body, wraps on Nd-Fe-B permanent magnet body
It is covered with metal shell；The material for preparing of described metal shell includes：Fe60-75%, Ni25-40%.
Preferably, the material for preparing of described metal shell also includes Cr1-3%, Mn1-3%, Si1-3%, Cr1-
Any one in 3%, Cu1-3%, Co1-3%, C1-3% or any two kinds, various combination.
Include as the material for preparing of further preferred, described metal shell：Cr2%, Mn2%, Si2%, Cr2%,
One kind in Cu2%, Co2%, C2%；Using above-mentioned formula rate, the temperature-compensating material of preparation is may further ensure that
Magnetic is more stable, and first magnetic is not dropped in hot conditions.
The element weight percent sum of the material of above-mentioned composition metal shell is 100%.
Preferably, described cladding is mutually pasted for the outer surface of Nd-Fe-B permanent magnet body with the inner surface of metal shell
Close.Gapless, more conducively temperature-compensating between Nd-Fe-B permanent magnet body and metal shell is ensured using the structure, and was prepared
Journey does not easily cause the explosion of metal shell due to gapless, without air.
The wind-driven generator of the present invention or specifically preparing for permanent magnet motor Nd-Fe-B permanent magnet temperature-compensating material
Journey includes：
(1) metal shell feed proportioning is mixed according to formula rate, melting is then melted in vacuum induction melting furnace,
Ingot casting is obtained after cooling, 850-1000 DEG C of forging, repeatedly jumping-up, pulling are heated to ingot casting, be prepared into the plate of thickness 10-15mm
Base, then obtains the metal shell of thickness 0.3-0.5mm, further according to permanent magnet to be covered at 850-900 DEG C using warm-rolling technique
Size cut sheet metal, then according to permanent magnet outer contour shape punching stretch into the gold fitted with permanent magnet outline
Category housing；
(2) metal shell of step (1) is fastened on permanent magnet outline, is then placed in the vacuum of vacuum≤1KPa
Workpiece is clamped under environment, reuse cold welding machine carries out cold welding to metal shell with reference to gap；
(3) pressurizeed at normal temperatures after welding, pressure >=280KPa, detection combination magnet sealed degree, after welding is qualified
Metal shell weld mark is ground off with flat stone mill and reach the size of necessary requirement；Finally it is polished, cleans, mounted box.
The cold welding condition of step (2) of the present invention is：0.1-0.2mm of gage of wire, argon flow amount 1-2L/min, weld arteries and veins
Rush frequency 1-5 (interior 1-5 umber of pulses i.e. per second) per second；Every time the fusion length of welding is 10-20mm, treats that workpiece is cooled to
Cold welding is further continued for after 40-65 DEG C；Using above-mentioned technique, it is ensured that workpiece surface temperature will not steeply rise, and it is quick to radiate,
Prevent stress big.
The advantages of the present invention：
1. present invention firstly provides realizing temperature-compensating, Jing Guojian in the outer surface cladding layer of metal housing of permanent magnet
The permanent magnet for finding to prepare using this technique is surveyed used in wind-driven generator, even if temperature is reached as 80-100 DEG C
High temperature, permanent magnet remains in that good magnetic, combination magnet testing result：Br=11.64kGs (20 DEG C).Br=
11.36kGs (100 DEG C), α (negative temperature coefficient)=- 0.03%；Negative temperature coefficient than traditional -0.11% is substantially reduced, and is protected
The stability of wind-driven generator is held.
2. the metal housing materials that the present invention is adopted, with the magnetic that permanent magnet can be maintained under high temperature (80-100 DEG C),
The metal material can not only be effectively protected the permanent magnet magnetism of inside, while fast, heat diffusion of lowering the temperature when can also realize welding
Rapidly, the deficiency of the permanent magnet magnetism shakiness that hot-spot causes is not resulted in；And the material hardness is high, it is difficult to clash into change
Shape, is effectively ensured the integrality for being coated on permanent magnet therein.
Description of the drawings
Fig. 1 magnet structure schematic diagrames of the present invention.
The cross section view of Fig. 2 Fig. 1.
As shown in the figure：1- Nd-Fe-B permanent magnet bodies, 2- metal shells.
Specific embodiment
The present invention is described in further detail below by embodiment, but the present invention is not limited solely to following examples.
The Nd-Fe-B permanent magnet body of the present invention is commercially available prod, can such as adopt Shanxi Liteng High-tech. Magnet Co., Ltd.
The material trademark of sale：The neodymium iron boron of N48H, as long as suitable for the Nd-Fe-B permanent magnet on wind-driven generator or permanent magnet motor
It is suitable for the present invention.
Wind-driven generator of the invention as shown in Figure 1-2 or permanent magnet motor Nd-Fe-B permanent magnet, including neodymium iron boron
Permanent magnet 1, the outside of described Nd-Fe-B permanent magnet 1 is coated with layer of metal housing 2；Its processing method specific embodiment is such as
Under：
Metal shell is prepared first, is specifically prepared according to following formula：
The metal shell formula of table 1
The preparation technology of metal shell adopts industry routine techniques, and substantially process is as follows：According to formula rate by metal-back
Body feed proportioning mixes, and melting is then melted in vacuum induction melting furnace, and ingot casting is obtained after cooling, ingot casting is added to 850-
1000 DEG C of forgings, jumping-up, pullings repeatedly, are prepared into the slab of thickness 10-15mm, then adopt warm-rolling technique at 850-900 DEG C
Obtain the metal shell of thickness 0.3-0.5mm.
The preparation of Nd-Fe-B permanent magnet temperature-compensating material of a kind of wind-driven generator or permanent magnet motor, the method step
Including：
(1) sheet metal (metal shell) of above-mentioned preparation is cut according to the size of permanent magnet to be covered, then basis
Permanent magnet outer contour shape punching stretch is into the metal shell fitted with permanent magnet outline；
(4) metal shell of step (1) is fastened on permanent magnet outline, is then placed in the vacuum of vacuum≤1KPa
Workpiece is clamped under environment, reuse cold welding machine carries out cold welding to metal shell with reference to gap；
(3) pressurizeed at normal temperatures after welding, pressure >=280KPa, detection combination magnet sealed degree, after welding is qualified
Combination magnet weld mark is ground off with flat stone mill and reach the size of necessary requirement；Finally it is polished, cleans, mounted box.
If the metal shell of the present invention is coated on the lateral surface of square Nd-Fe-B permanent magnet, metal shell is adopted
Two parts symmetrical, along the segmentation of permanent magnet short transverse, then fasten and are welded on permanent magnetism outside, using such knot
Structure can ensure that fit between metal shell and permanent magnet even closer,
The cold welding condition of step (2) of the present invention is：0.1-0.2mm of gage of wire, argon flow amount 1-2L/min, weld arteries and veins
Rush frequency 1-5 per second；Every time the fusion length of welding is 10-20mm, and after workpiece is cooled to 40-65 DEG C cold welding is further continued for；Adopt
Use above-mentioned technique, it is ensured that workpiece surface temperature will not steeply rise, and it is quick to radiate, and prevents stress big.I have modified
State data.
Temperature-compensating material prepared by embodiment 1 is detected, combination magnet testing result：Br (remanent magnetization)
=11.64kGs (20 DEG C), Br=11.36kGs (100 DEG C), α (negative temperature coefficient)=- 0.03%；Than traditional -0.11%
Negative temperature coefficient is substantially reduced, and maintains the stability of wind-driven generator.
Detection combination magnet detection result is carried out to temperature-compensating material prepared by embodiment 2-4：α (negative temperature coefficient) is
Negative temperature coefficient than traditional -0.11% is substantially reduced, and maintains the stability of wind-driven generator.
The Nd-Fe-B permanent magnet of the present embodiment as shown is square, it would however also be possible to employ other such as cylinders, round platform, trapezoidal
Etc. being applicable to the shape that wind-driven generator or magneto are used.
Claims (3)
1. a kind of wind-driven generator or permanent magnet motor Nd-Fe-B permanent magnet temperature-compensating material, it is characterised in that：The material
Including：Nd-Fe-B permanent magnet body, on Nd-Fe-B permanent magnet body metal shell is coated with；The system of described metal shell
It is standby
Material includes：Fe 60-75%, Ni 25-40%；The material for preparing of described metal shell also includes Cr1-3%, Mn1-
Any one in 3%, Si1-3%, Cu1-3%, Co1-3%, C 1-3% or any two kinds, various combination；Described bag
Cover and fitted with the inner surface of metal shell for the outer surface of Nd-Fe-B permanent magnet body；
Temperature-compensating material is manufactured according to following technique：
(1) metal shell feed proportioning is mixed according to formula rate, melting is then melted in vacuum induction melting furnace, it is cold
But ingot casting is obtained afterwards, 850-1000 DEG C of forging, repeatedly jumping-up, pulling are heated to ingot casting, be prepared into the plate of thickness 10-15mm
Base, then obtains the metal shell of thickness 0.3-0.5mm, further according to permanent magnet to be covered at 850-900 DEG C using warm-rolling technique
Size cut sheet metal, then according to permanent magnet outer contour shape punching stretch into the gold fitted with permanent magnet outline
Category housing；
(2) metal shell of step (1) is fastened on permanent magnet outline, is then placed in the vacuum of vacuum≤1KPa
Workpiece is clamped under environment, reuse cold welding machine carries out cold welding to metal shell with reference to gap；Cold welding condition is：Gage of wire
0.1-0.2mm, argon flow amount 1-2L/min, weld pulse frequency 1-5 is per second；Every time the fusion length of welding is 10-20mm,
Cold welding is further continued for after workpiece is cooled to 40-65 DEG C；
(3) pressurizeed at normal temperatures after welding, pressure >=280KPa, detection combination magnet sealed degree welds qualified rear use
Flat stone mill grinds off metal shell weld mark and reaches the size of necessary requirement；Finally it is polished, cleans, mounted box.
2. wind-driven generator according to claim 1 or permanent magnet motor Nd-Fe-B permanent magnet temperature-compensating material, its
It is characterised by：The material for preparing of described metal shell includes：Cr2%, Mn2%, Si2%, Cu2%, Co2%,
One kind in C2%.
3. wind-driven generator according to claim 1-2 any claim or permanent magnet motor Nd-Fe-B permanent magnet
Temperature-compensating material, it is characterised in that：The each element percentage by weight sum of the material of described metal shell is
100%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410509792.5A CN104242489B (en) | 2014-09-05 | 2014-09-28 | Neodymium iron boron permanent magnet temperature compensation material for wind driven generator or permanent magnetic engine |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2014205116724 | 2014-09-05 | ||
| CN201420511672 | 2014-09-05 | ||
| CN201420511672.4 | 2014-09-05 | ||
| CN201410509792.5A CN104242489B (en) | 2014-09-05 | 2014-09-28 | Neodymium iron boron permanent magnet temperature compensation material for wind driven generator or permanent magnetic engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104242489A CN104242489A (en) | 2014-12-24 |
| CN104242489B true CN104242489B (en) | 2017-05-10 |
Family
ID=52230058
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410509792.5A Active CN104242489B (en) | 2014-09-05 | 2014-09-28 | Neodymium iron boron permanent magnet temperature compensation material for wind driven generator or permanent magnetic engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104242489B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109457172B (en) * | 2018-11-01 | 2021-06-08 | 苏州市海威特铸造厂 | Low-linear expansion coefficient casting and casting process thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6577125B2 (en) * | 2000-12-18 | 2003-06-10 | Halliburton Energy Services, Inc. | Temperature compensated magnetic field apparatus for NMR measurements |
-
2014
- 2014-09-28 CN CN201410509792.5A patent/CN104242489B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN104242489A (en) | 2014-12-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Yang et al. | Weldability, microstructure and mechanical properties of laser-welded selective laser melted 304 stainless steel joints | |
| CN1918307A (en) | Methods employing permanent magnets having reach-out magnetic fields for electromagnetically pumping, braking, and metering molten metals feeding into metal casting machines | |
| CN103305726B (en) | Method for preparing nanoscale silicon carbide aluminum alloy bar | |
| Tang et al. | Laser surface alloying of a marine propeller bronze using aluminium powder: Part I: Microstructural analysis and cavitation erosion study | |
| CN104152781B (en) | A kind of preparation method of AlCoCuFeNiSi high-entropy alloy | |
| CN102277552A (en) | Metal surface treatment method employing arc-plasma spraying-laser remelting | |
| CN106191856B (en) | A kind of high anti-corrosion, high-coercive force Sintered NdFeB magnet and preparation method | |
| CN106783131A (en) | A kind of preparation method of sintered NdFeB thin slice magnet | |
| CN104242489B (en) | Neodymium iron boron permanent magnet temperature compensation material for wind driven generator or permanent magnetic engine | |
| CN103273020B (en) | A kind of Electromagnetic Heating cap mouth device of static ingot | |
| Loewenhoff et al. | High pulse number thermal shock testing of tungsten alloys produced by powder injection molding | |
| Nabahat et al. | Effect of ultrasonic vibrations in TIG welded AISI 321 stainless steel: microstructure and mechanical properties | |
| CN112695316B (en) | Laser cladding coating and preparation method thereof | |
| CN103273201A (en) | Permanent-magnet electromagnetic stirring device for titanium alloy laser repair | |
| CN104269979B (en) | Wind-driven generator or permanent magnet motor Nd-Fe-B permanent magnet temperature-compensating member processing method | |
| Zhang et al. | Influence of High‐Frequency Micro‐Forging on Microstructure and Properties of 304 Stainless Steel Fabricated by Laser Rapid Prototyping | |
| CN111001777A (en) | Composite field treatment and high-pressure extrusion forming method for iron-containing aluminum alloy | |
| CN204205731U (en) | Wind-driven generator or permanent magnet motor temperature-compensating Nd-Fe-B permanent magnet | |
| CN116145130A (en) | Method for preparing pure copper coating by adopting laser cladding, base material and storage tank | |
| JP2007180372A (en) | METHOD OF MANUFACTURING NdFeB-BASED MAGNET | |
| CN106826115B (en) | A kind of welding processing of sintered Nd-Fe-B permanent magnet | |
| JP2008294468A (en) | METHOD OF MANUFACTURING NdFeB-BASED MAGNET | |
| US10898949B2 (en) | Techniques and apparatus for electromagnetically stirring a melt material | |
| CN108246992A (en) | A kind of method for preparing fine grain rare earth alloy slab and rotation cooling roller device | |
| CN107723639B (en) | A kind of method that laser surface remelting improves 2 line aluminium alloy corrosion resistances |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |