CN114567090A - Permanent magnetic ferrite rotor - Google Patents
Permanent magnetic ferrite rotor Download PDFInfo
- Publication number
- CN114567090A CN114567090A CN202210225389.4A CN202210225389A CN114567090A CN 114567090 A CN114567090 A CN 114567090A CN 202210225389 A CN202210225389 A CN 202210225389A CN 114567090 A CN114567090 A CN 114567090A
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- CN
- China
- Prior art keywords
- agent
- polyphenylene sulfide
- parts
- region
- permanent
- 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.)
- Pending
Links
- 229910000859 α-Fe Inorganic materials 0.000 title claims abstract description 24
- 239000004734 Polyphenylene sulfide Substances 0.000 claims abstract description 36
- 229920000069 polyphenylene sulfide Polymers 0.000 claims abstract description 36
- 239000012744 reinforcing agent Substances 0.000 claims abstract description 23
- 239000007822 coupling agent Substances 0.000 claims abstract description 22
- 239000012745 toughening agent Substances 0.000 claims abstract description 18
- 229920003225 polyurethane elastomer Polymers 0.000 claims abstract description 16
- 239000006247 magnetic powder Substances 0.000 claims abstract description 15
- 238000001746 injection moulding Methods 0.000 claims abstract description 12
- 239000000314 lubricant Substances 0.000 claims abstract description 12
- 239000002270 dispersing agent Substances 0.000 claims abstract description 10
- 239000000155 melt Substances 0.000 claims abstract description 3
- 238000002156 mixing Methods 0.000 claims description 15
- 239000003365 glass fiber Substances 0.000 claims description 13
- AGXUVMPSUKZYDT-UHFFFAOYSA-L barium(2+);octadecanoate Chemical compound [Ba+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O AGXUVMPSUKZYDT-UHFFFAOYSA-L 0.000 claims description 9
- CJZGTCYPCWQAJB-UHFFFAOYSA-L calcium stearate Chemical compound [Ca+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O CJZGTCYPCWQAJB-UHFFFAOYSA-L 0.000 claims description 9
- 239000008116 calcium stearate Substances 0.000 claims description 9
- 235000013539 calcium stearate Nutrition 0.000 claims description 9
- 239000000203 mixture Substances 0.000 claims description 8
- 238000002360 preparation method Methods 0.000 claims description 5
- 229920001897 terpolymer Polymers 0.000 claims description 4
- 239000008188 pellet Substances 0.000 claims description 2
- 238000001514 detection method Methods 0.000 abstract description 4
- 230000004048 modification Effects 0.000 abstract description 4
- 238000012986 modification Methods 0.000 abstract description 4
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 6
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000005469 granulation Methods 0.000 description 2
- 230000003179 granulation Effects 0.000 description 2
- 229920001451 polypropylene glycol Polymers 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- DVKJHBMWWAPEIU-UHFFFAOYSA-N toluene 2,4-diisocyanate Chemical compound CC1=CC=C(N=C=O)C=C1N=C=O DVKJHBMWWAPEIU-UHFFFAOYSA-N 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229940057995 liquid paraffin Drugs 0.000 description 1
- 238000007909 melt granulation Methods 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000010074 rubber mixing Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/02—Details of the magnetic circuit characterised by the magnetic material
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/032—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
- H01F1/10—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials non-metallic substances, e.g. ferrites, e.g. [(Ba,Sr)O(Fe2O3)6] ferrites with hexagonal structure
- H01F1/11—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials non-metallic substances, e.g. ferrites, e.g. [(Ba,Sr)O(Fe2O3)6] ferrites with hexagonal structure in the form of particles
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
The invention discloses a permanent magnetic ferrite rotor, which is formed by injection molding, and comprises the following components by mass: 80-88 parts of permanent magnetic ferrite magnetic powder; 10-15 parts of modified polyphenylene sulfide, 80-85 parts of polyphenylene sulfide, 10-15 parts of polyurethane elastomer, 4-6 parts of reinforcing agent, 5-8 parts of toughening agent, 0.2-0.4 part of lubricant and 0.1-0.3 part of coupling agent are mixed and melted to form the modified polyphenylene sulfide, and the melt viscosity is 30-45 Pa.S; 0.2-0.5 part of coupling agent; 0.02-0.05 part of dispersing agent, wherein the scheme is characterized in that polyurethane elastomer, reinforcing agent, toughening agent, coupling agent and the like are mixed with polyphenylene sulfide for modification, the prepared modified polyphenylene sulfide and magnetic powder are mixed and injected to form the rotor, the reinforcing agent and the toughening agent are uniformly distributed, and the rotor has better mechanical strength, toughness, high temperature resistance and other properties through detection.
Description
Technical Field
The invention relates to the technical field of motors, in particular to a permanent magnetic ferrite rotor.
Background
For a motor rotor, the current popular process is injection molding, magnetic powder is generally uniformly mixed with binders such as nylon, polyphenylene sulfide and the like, and the mixture is granulated and injected into a mold to form the rotor, so that the advantages of low cost, simple preparation process and the like are achieved, and the defects of poor mechanical strength, easiness in cracking and the like also exist at the same time.
Disclosure of Invention
In order to solve at least one technical defect, the invention provides the following technical scheme:
the application document discloses a permanent magnetic ferrite rotor, the rotor injection moulding, by mass, the rotor includes following component:
80-88 parts of permanent magnetic ferrite magnetic powder;
10-15 parts of modified polyphenylene sulfide, 80-85 parts of polyphenylene sulfide, 10-15 parts of polyurethane elastomer, 4-6 parts of reinforcing agent, 5-8 parts of toughening agent, 0.2-0.4 part of lubricant and 0.1-0.3 part of coupling agent are mixed and melted to form the modified polyphenylene sulfide, and the melt viscosity is 30-45 Pa.S;
0.2-0.5 part of coupling agent;
0.02-0.05 part of dispersant.
According to the scheme, the polyurethane elastomer, the reinforcing agent, the toughening agent, the coupling agent and the like are mixed with the polyphenylene sulfide for modification, the prepared modified polyphenylene sulfide and the magnetic powder are mixed and injected to form the rotor, the reinforcing agent and the toughening agent are uniformly distributed, and the rotor has better mechanical strength, toughness, high temperature resistance and other performances through detection.
Further, the reinforcing agent is a mixture of glass fiber, calcium stearate and barium stearate, wherein the length of the glass fiber is 2-4mm, the diameter of the glass fiber is 7-12 mu m, and the reinforcing agent has a better modification effect on polyphenylene sulfide and has a large performance increase on a molded rotor under the condition that the glass fiber, the calcium stearate, the barium stearate and the like are mixed according to a given proportion.
Further, the mass ratio of the glass fiber to the calcium stearate to the barium stearate in the reinforcing agent is 10-8:1: 1.
Furthermore, the toughening agent is an ethylene-methyl acrylate-glycidyl methacrylate terpolymer, and the terpolymer is used for toughening and modifying, so that the detection result is more excellent.
Further, the coupling agent is KH550, KH560 or KH 792.
Further, the preparation of the modified polyphenylene sulfide comprises the steps of mixing the polyphenylene sulfide, the polyurethane elastomer, the reinforcing agent, the toughening agent, the lubricant and the coupling agent, and then granulating by using a screw extruder, wherein the temperature intervals of all sections of the screw extruder are as follows: the first region is 220-235 ℃, the second region is 235-270 ℃, the third region is 270-310 ℃, the fourth region is 310-325 ℃, the fifth region is 310-325 ℃, the sixth region is 310-325 ℃, the seventh region is 310-325 ℃, the eighth region is 310-325 ℃, the ninth region is 310-325 ℃ and the tenth region is 310-325 ℃.
Furthermore, during mixing, the polyphenylene sulfide and the polyurethane elastomer are mixed firstly, and then the coupling agent, the lubricant, the reinforcing agent and the toughening agent are sequentially added, so that the materials and components are uniformly distributed.
Further, the injection molding of the rotor includes:
mixing the permanent magnetic ferrite magnetic powder with a coupling agent and a dispersing agent;
mixing the modified polyphenylene sulfide, the dispersing agent and the permanent magnetic ferrite magnetic powder mixture, and extruding and granulating;
and a step of injection molding the prepared pellets into a rotor.
As for the injection molding parameters, the injection molding parameters can be controlled according to the conventional method, for example, the temperature is controlled at 315-.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the invention, the modified polyphenylene sulfide is mixed with the magnetic powder and the like, so that the components of the mixed material are reduced, the material is uniformly distributed, and the performance of the formed rotor is greatly improved.
Detailed Description
The present invention will be further described with reference to the following specific examples.
In the present invention, all the equipments and materials are commercially available or commonly used in the industry, and the methods in the following examples are conventional methods or conventional process parameters in the art unless otherwise specified.
Polyphenylene sulfide, as prepared in the examples below: melt viscosity (310 ℃, 1200S)-1) 33 Pa.S;
the dispersant was consistent with that used in CN 111210964B;
the permanent magnetic ferrite magnetic powder has the average grain diameter (Fisher's permeability method) D50 of 1.53 mu m, Br of 2815Gs and HCj of 28640e which are evaluated by a rubber mixing method and basically consistent with the use in CN 111210964B;
the polyurethane elastomer is self-made and is prepared by the reaction of polypropylene glycol 2000, toluene diisocyanate, ethylene glycol, glycerol and the like, and the polyurethane elastomer in the following examples is as follows: taking 20 parts by mass of polypropylene glycol 2000, stirring at 100 ℃, dehydrating in vacuum for 2 hours, cooling, adding 50 parts by mass of toluene diisocyanate, reacting at 70 ℃ for 1 hour, adding 11 parts by mass of ethylene glycol and 11 parts by mass of glycerol, reacting at 80 ℃ for 10 minutes, defoaming in vacuum, curing, keeping the curing temperature at 70 ℃, keeping the temperature for 12 hours, heating to 100 ℃, keeping the temperature for 10 hours, and cooling to obtain the polyurethane elastomer.
The particle diameter of calcium stearate and barium stearate is 18-25 μm, the length of glass fiber is 2-4mm, and the diameter is 8-10 μm.
The toughening agent is an ethylene-methyl acrylate-glycidyl methacrylate terpolymer, the lubricant is liquid paraffin, and the coupling agent is 1: 10 parts in isopropanol.
The formulation of the rotors in the following examples is shown in the following table:
TABLE 1
Wherein
The modified polyphenylene sulfide of example 1 was prepared as follows: firstly, mixing polyphenylene sulfide with a polyurethane elastomer, then sequentially adding a coupling agent, a lubricant, a reinforcing agent and a toughening agent, uniformly mixing, and then carrying out melt granulation by a screw extruder, wherein the temperature interval of each section of the screw extruder is as follows: the first region is 220-235 ℃, the second region is 235-270 ℃, the third region is 270-310 ℃, the fourth region is 310-325 ℃, the fifth region is 310-325 ℃, the sixth region is 310-325 ℃, the seventh region is 310-325 ℃, the eighth region is 310-325 ℃, the ninth region is 310-325 ℃ and the tenth region is 310-325 ℃.
80 parts of polyphenylene sulfide, 10 parts of polyurethane elastomer, 0.1 part of coupling agent, 0.2 part of lubricating agent, 4 parts of reinforcing agent and 5 parts of toughening agent, wherein the mass ratio of glass fiber, calcium stearate and barium stearate in the reinforcing agent is 10:1: 1.
The modified polyphenylene sulfide of example 2 was prepared as follows: the preparation method is the same as that in example 1, and the component proportions are as follows:
83 parts of polyphenylene sulfide, 12 parts of polyurethane elastomer, 0.2 part of coupling agent, 0.3 part of lubricant, 5 parts of reinforcing agent and 6 parts of toughening agent, wherein the mass ratio of glass fiber, calcium stearate and barium stearate in the reinforcing agent is 9:1: 1.
The modified polyphenylene sulfide of example 3 was prepared as follows: the preparation method is the same as that in example 1, and the component proportions are as follows:
85 parts of polyphenylene sulfide, 15 parts of polyurethane elastomer, 0.3 part of coupling agent, 0.4 part of lubricant, 6 parts of reinforcing agent and 8 parts of toughening agent, wherein the mass ratio of glass fiber, calcium stearate and barium stearate in the reinforcing agent is 8:1: 1.
The permanent ferrite rotor in the example was prepared as follows:
mixing the permanent magnetic ferrite magnetic powder, the coupling agent and the 2/3 dispersing agent in a powder mixing cylinder for 50min at 100 ℃, and controlling the water content of the magnetic powder within 1000 ppm.
Continuously adding the modified polyphenylene sulfide and 1/3 dispersant, mixing, and continuously mixing powder at 120 deg.C for 30min to control the water content of the mixture within 300 ppm.
And (3) adding the final mixture into a screw extruder for granulation, wherein the granulation temperature is controlled at 320 ℃.
And (3) carrying out injection molding on the granules at 330 ℃ and at 1850bar pressure.
The rotor and dumbbell-shaped splines can be directly formed (the detection of mechanical strength is convenient).
And comparative example 1 was set up: compared with the example 1, the modified polyphenylene sulfide is not prepared in advance in the comparative example, the components for preparing the modified polyphenylene sulfide are directly added after the permanent magnetic ferrite magnetic powder is mixed, and the formula components, the rest steps and the like are consistent with the example 1.
The injection-molded dumbbell specimens of the examples and comparative examples were tested under the same test conditions as in CN111210964B, and the test performance data are shown in the following table.
TABLE 2
From the data in the table, it can be seen that the process scheme of pre-modifying polyphenylene sulfide and then mixing, granulating and injection molding can improve the mechanical properties of the workpiece again.
The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above-mentioned embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.
Claims (8)
1. The permanent magnetic ferrite rotor is characterized in that the rotor is formed by injection molding, and comprises the following components by mass:
80-88 parts of permanent magnetic ferrite magnetic powder;
10-15 parts of modified polyphenylene sulfide, 80-85 parts of polyphenylene sulfide, 10-15 parts of polyurethane elastomer, 4-6 parts of reinforcing agent, 5-8 parts of toughening agent, 0.2-0.4 part of lubricant and 0.1-0.3 part of coupling agent are mixed and melted to form the modified polyphenylene sulfide, and the melt viscosity is 30-45 Pa.S;
0.2-0.5 part of coupling agent;
0.02-0.05 part of dispersant.
2. The permanent ferrite rotor according to claim 1, characterized in that: the reinforcing agent is a mixture of glass fiber, calcium stearate and barium stearate, wherein the length of the glass fiber is 2-4mm, and the diameter of the glass fiber is 7-12 mu m.
3. The permanent ferrite rotor according to claim 2, characterized in that: the mass ratio of the glass fiber, the calcium stearate and the barium stearate in the reinforcing agent is 10-8:1: 1.
4. The permanent ferrite rotor according to claim 1, characterized in that: the toughening agent is an ethylene-methyl acrylate-glycidyl methacrylate terpolymer.
5. The permanent ferrite rotor according to claim 1, characterized in that: the coupling agent is KH550, KH560 or KH 792.
6. The permanent ferrite rotor according to claim 1, characterized in that: the preparation of the modified polyphenylene sulfide comprises the steps of mixing the polyphenylene sulfide, the polyurethane elastomer, the reinforcing agent, the toughening agent, the lubricant and the coupling agent, and then granulating by a screw extruder, wherein the temperature intervals of all sections of the screw extruder are as follows: the first region is 220-235 ℃, the second region is 235-270 ℃, the third region is 270-310 ℃, the fourth region is 310-325 ℃, the fifth region is 310-325 ℃, the sixth region is 310-325 ℃, the seventh region is 310-325 ℃, the eighth region is 310-325 ℃, the ninth region is 310-325 ℃ and the tenth region is 310-325 ℃.
7. The permanent ferrite rotor according to claim 6, wherein: during mixing, firstly, the polyphenylene sulfide and the polyurethane elastomer are mixed, and then the coupling agent, the lubricant, the reinforcing agent and the toughening agent are sequentially added.
8. The permanent ferrite rotor according to claim 1, wherein: the injection molding of the rotor includes:
mixing the permanent magnetic ferrite magnetic powder with a coupling agent and a dispersing agent;
mixing the modified polyphenylene sulfide, the dispersing agent and the permanent magnetic ferrite magnetic powder mixture, and extruding and granulating;
and a step of injection molding the prepared pellets into a rotor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210225389.4A CN114567090A (en) | 2022-03-09 | 2022-03-09 | Permanent magnetic ferrite rotor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210225389.4A CN114567090A (en) | 2022-03-09 | 2022-03-09 | Permanent magnetic ferrite rotor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114567090A true CN114567090A (en) | 2022-05-31 |
Family
ID=81716923
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210225389.4A Pending CN114567090A (en) | 2022-03-09 | 2022-03-09 | Permanent magnetic ferrite rotor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114567090A (en) |
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2022
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