CN110676986B - Forming method of magnetic pole protective layer of motor outer rotor - Google Patents
Forming method of magnetic pole protective layer of motor outer rotor Download PDFInfo
- Publication number
- CN110676986B CN110676986B CN201910989148.5A CN201910989148A CN110676986B CN 110676986 B CN110676986 B CN 110676986B CN 201910989148 A CN201910989148 A CN 201910989148A CN 110676986 B CN110676986 B CN 110676986B
- Authority
- CN
- China
- Prior art keywords
- thermal expansion
- nonmetallic
- glue injection
- magnetic pole
- annular
- 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
- 239000011241 protective layer Substances 0.000 title claims abstract description 40
- 238000000034 method Methods 0.000 title claims abstract description 38
- 239000003292 glue Substances 0.000 claims abstract description 98
- 238000002347 injection Methods 0.000 claims abstract description 67
- 239000007924 injection Substances 0.000 claims abstract description 67
- 229920005989 resin Polymers 0.000 claims abstract description 8
- 239000011347 resin Substances 0.000 claims abstract description 8
- 239000000243 solution Substances 0.000 claims description 23
- 239000010410 layer Substances 0.000 claims description 14
- 238000007789 sealing Methods 0.000 claims description 14
- 238000003825 pressing Methods 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 claims description 7
- 239000000853 adhesive Substances 0.000 claims description 5
- 230000001070 adhesive effect Effects 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 4
- 229910052755 nonmetal Inorganic materials 0.000 claims description 4
- 239000004677 Nylon Substances 0.000 claims description 3
- 239000004698 Polyethylene Substances 0.000 claims description 3
- 230000005484 gravity Effects 0.000 claims description 3
- 229920001778 nylon Polymers 0.000 claims description 3
- -1 polyethylene Polymers 0.000 claims description 3
- 229920000573 polyethylene Polymers 0.000 claims description 3
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 claims description 3
- 239000006082 mold release agent Substances 0.000 claims description 2
- 238000007711 solidification Methods 0.000 claims description 2
- 230000008023 solidification Effects 0.000 claims description 2
- 239000004744 fabric Substances 0.000 abstract description 6
- 239000007787 solid Substances 0.000 abstract description 4
- 230000008602 contraction Effects 0.000 abstract description 3
- 239000002920 hazardous waste Substances 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000002360 preparation method Methods 0.000 abstract description 3
- 238000000926 separation method Methods 0.000 abstract description 3
- 238000004904 shortening Methods 0.000 abstract description 3
- 238000012546 transfer Methods 0.000 abstract description 3
- 239000000463 material Substances 0.000 description 10
- 230000002093 peripheral effect Effects 0.000 description 4
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 239000000835 fiber Substances 0.000 description 3
- 239000000696 magnetic material Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 239000012779 reinforcing material Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- QJVKUMXDEUEQLH-UHFFFAOYSA-N [B].[Fe].[Nd] Chemical compound [B].[Fe].[Nd] QJVKUMXDEUEQLH-UHFFFAOYSA-N 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000004132 cross linking Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910001172 neodymium magnet Inorganic materials 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 229910052779 Neodymium Inorganic materials 0.000 description 1
- 229920006223 adhesive resin Polymers 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000011152 fibreglass Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- QEFYFXOXNSNQGX-UHFFFAOYSA-N neodymium atom Chemical compound [Nd] QEFYFXOXNSNQGX-UHFFFAOYSA-N 0.000 description 1
- 235000011837 pasties Nutrition 0.000 description 1
- 239000011253 protective coating Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/02—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Power Engineering (AREA)
- Manufacture Of Motors, Generators (AREA)
Abstract
The invention discloses a forming method of a magnetic pole protective layer of an outer rotor of a motor, which utilizes thermal expansion and cold contraction of a thermal expansion nonmetallic block to realize the glue injection requirement and automatic separation of the thermal expansion nonmetallic block and the magnetic pole protective layer after glue injection, and auxiliary glue injection components such as a vacuum bag film, a stripping cloth, a flow guide net and the like are not needed, so that the preparation process before glue injection is simplified, the workload is greatly reduced, and the glue injection period is shortened; in addition, the forming method of the invention controls the pressure between the thermal expansion nonmetallic block and the inside of the annular component, so that the magnetic pole protective layer is more compact and has high solid heat transfer speed, and the high-quality magnetic pole protective layer can be formed by only one-time glue injection, thereby further shortening the production period. In addition, after the glue injection is finished, the thermal expansion nonmetallic block and the magnetic pole protective layer are naturally separated, and almost no resin remains on the surface of the thermal expansion nonmetallic block, so that hazardous waste is greatly reduced, the cost is reduced, and the environment is protected.
Description
Technical Field
The invention relates to the technical field of motor rotor magnetic pole protection, in particular to a forming method of a motor outer rotor magnetic pole protection layer.
Background
The permanent magnet motor is an electromagnetic device for converting mechanical energy and electric energy into each other by taking a magnetic field as a medium, and is widely applied to various power generation places. The magnetism of the permanent magnet material of the permanent magnet motor is one of important factors affecting the power generation performance of the permanent magnet motor.
The permanent magnet motor comprises a rotor body, press bars, magnetic pole parts and the like, wherein the rotor body is generally cylindrical, the prefabricated press bars are mounted on the inner peripheral wall of a rotor by using fasteners such as bolts, after the positions of the press bars are fixed, the magnetic pole parts are pushed to corresponding positions between adjacent press bars along the axial direction, the cross sections of the press bars are generally trapezoidal, namely, the two side walls of the press bars are trapezoidal inclined planes, and the radial magnetic pole parts are limited in trapezoidal spaces formed by the adjacent press bars. The magnetic pole part is made of permanent magnetic material, the main component of the permanent magnetic material is neodymium iron boron, iron and neodymium in the neodymium iron boron are easy to oxidize, and magnetic property change is caused, so that in order to avoid the influence of external environment on the magnetic property of the magnetic pole part as much as possible, a protective coating layer is generally cast on the surface of the magnetic pole part, and the specific process is described in detail below.
Firstly, a vacuum bag is arranged on the inner wall of a magnetic yoke wall, the vacuum bag and the magnetic yoke wall form a mold cavity, a pressing bar and a magnetic pole part are coated in the mold cavity, and in general, for the follow-up easy demolding and glue injection uniformity, parts such as demolding cloth, a diversion net and the like are also required to be paved. Secondly, vacuumizing the die cavity by using a vacuum pump to compact the reinforcing material on the surfaces of the pressing strips and the magnetic pole parts, leading out residual air between the surfaces of the magnetic pole parts and the wall surface of the magnetic yoke, vacuum pouring an adhesive (resin) into the die cavity, impregnating the fiber reinforcing material while flowing from one end of the die cavity to the other end along the axial direction, filling gaps between the magnetic pole parts and the wall of the magnetic yoke, filling gaps between the magnetic pole parts and the pressing strips, covering the pressing strips and the surfaces of the magnetic pole parts, and after the adhesive fills the whole die cavity, the gaps and the gaps, infiltrating and impregnating the contact surface between the inside of the die cavity and the solid to control the curing process so as to form the resin-based reinforcing material protective covering layer.
The use amount of the stripping cloth, the diversion net and the vacuum bag paved in the existing glue injection process is large, the workload is correspondingly large, and the glue solution is remained on the surfaces of all the parts and is wasted.
In view of this, how to reduce the forming workload of the magnetic pole protective layer and reduce the waste of glue solution is a problem to be solved by those skilled in the art.
Disclosure of Invention
The invention provides a forming method of a magnetic pole protective layer in a motor rotor assembly, which comprises the following steps:
assembling parts at least comprising a magnetic pole part, a pressing strip and a rotor to form an outer rotor annular assembly;
the thermal expansion nonmetallic blocks are arranged in the inner ring of the annular assembly, and an annular gap is formed between the inner surface of the annular assembly to be injected with glue and the thermal expansion nonmetallic blocks;
the lower end of the annular gap is configured to form a glue injection port for communicating with glue injection equipment, and the other end of the annular gap is configured to form an exhaust port for communicating with vacuumizing equipment;
heating the annular component and the thermal expansion nonmetallic block to the glue injection temperature, controlling the glue injection equipment to inject glue between the inner surface to be glued of the annular component and the thermal expansion nonmetallic block, and simultaneously controlling the vacuumizing equipment to vacuumize the annular gap;
after the glue injection is completed and the magnetic pole protective layer is formed by solidification, the thermal expansion nonmetallic block and the annular assembly formed with the magnetic pole protective layer are cooled to a preset temperature, so that the outer wall of the thermal expansion nonmetallic block is separated from the formed magnetic pole protective layer.
According to the molding method of the magnetic pole protective layer in the motor rotor assembly, provided by the invention, the glue injection requirement and the automatic separation of the thermal expansion nonmetallic block and the magnetic pole protective layer after glue injection are realized by utilizing the thermal expansion and cold contraction of the thermal expansion nonmetallic block, auxiliary glue injection components such as a vacuum bag film, a demolding cloth and a diversion net are not needed, the preparation process before glue injection is simplified, the workload is greatly reduced, and the glue injection period is shortened; in addition, the forming method of the invention controls the pressure between the thermal expansion nonmetallic block and the inside of the annular component, so that the magnetic pole protective layer is more compact and has high solid heat transfer speed, and the high-quality magnetic pole protective layer can be formed by only one-time glue injection, thereby further shortening the production period. In addition, after the glue injection is finished, the thermal expansion nonmetallic block and the magnetic pole protective layer are naturally separated, and almost no resin remains on the surface of the thermal expansion nonmetallic block, so that hazardous waste is greatly reduced, the cost is reduced, and the environment is protected.
Optionally, the thermally expansive non-metal has the following characteristics: at normal temperature, an annular gap is formed between the inner surface of the annular component to be injected with the adhesive and the thermal expansion nonmetallic block; and at the glue injection temperature, the thermal expansion nonmetallic blocks expand and exert certain pressure on the inner wall of the annular assembly to meet the glue injection requirement.
Optionally, the configuration mode of the exhaust port specifically includes: sealing the upper end part of the annular gap by using a sealing film, and then opening the exhaust port on the sealing film; wherein the upper end of the annular gap is the rotor near the top of the nacelle-side pole piece.
Optionally, the outer surface of the thermally expandable nonmetallic block is further coated with a mold release agent before the thermally expandable nonmetallic block is placed on the inner ring of the annular assembly.
Optionally, the thermally expandable nonmetallic blocks comprise one or more of tetrafluoroethylene, modified nylon, or polyethylene.
Optionally, the coefficient of friction of the outer surface of the thermally expanded non-metallic block is in the range of 0.015 to 0.2.
Optionally, heating the annular assembly and the thermal expansion nonmetallic block to a glue injection temperature, and before glue injection, a pressure value range between the annular assembly and the thermal expansion nonmetallic block is as follows: 0.1Mpa-0.2Mpa.
Optionally, the annular assembly and the thermally expandable nonmetallic block are maintained at the injection temperature for a predetermined period of time to bake, during which the pressure value between the annular assembly and the thermally expandable nonmetallic block is maintained at: 0.1Mpa-0.2Mpa.
Optionally, during glue injection, the glue solution is filled upwards from the lower part of the annular gap, and a preset pressure is applied to a pipeline for conveying the glue solution to the glue injection port, wherein the preset pressure is larger than the gravity value for filling resin into the annular gap.
Optionally, the time for filling the glue solution is controlled to be within 10 minutes.
Optionally, at room temperature, the space between the inner surface to be injected with the glue of the annular component and the thermal expansion nonmetallic block is 6mm-10mm.
Drawings
Fig. 1 is a schematic flow chart of a forming method of a pole protection layer of an outer rotor of a motor according to a first embodiment of the invention;
fig. 2 is a flow chart of a method for forming a pole protection layer of an outer rotor of a motor.
The correspondence between the reference numerals and the component names in fig. 1 is:
1-a rotor; 2-thermally expanding nonmetallic blocks.
Detailed Description
The core of the invention is to provide a forming method of a magnetic pole protective layer in a motor rotor assembly, which can reduce the forming workload of the magnetic pole protective layer and greatly reduce the waste of glue solution.
In order to make the technical solution of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1 and fig. 2, fig. 1 is a flow chart illustrating a forming method of a pole protection layer of an outer rotor of a motor according to a first embodiment of the invention; fig. 2 is a flow chart of a method for forming a pole protection layer of an outer rotor of a motor.
The motor rotor assembly provided by the invention at least comprises a rotor 1, magnetic pole components, pressing strips and the like. The rotor 1 herein mainly refers to an outer rotor, the compression bars can be generally mounted on the inner peripheral wall of the rotor 1 by using fasteners such as bolts, after the compression bars are fixed, the magnetic pole parts are pushed to corresponding positions between adjacent compression bars along the axial direction, and the magnetic pole parts are made of permanent magnetic materials, usually magnetic steel.
In order to increase the strength of the magnetic pole protection layer, a layer of fiber reinforced material is also paved on the surface of the pressing strip and the magnetic steel.
The invention provides a forming method of a magnetic pole protective layer of an outer rotor of a motor, which comprises the following steps:
s1, assembling parts at least comprising magnetic pole parts, pressing strips and a rotor 1 to form an outer rotor annular assembly;
as mentioned above, the annular assembly is exemplified in this application by an outer rotor of a motor, and the components forming the annular assembly may also include fiber reinforced materials, such as fiberglass cloth.
S2, the thermal expansion nonmetallic block 2 is arranged in an inner ring of the annular assembly, and an annular gap is formed between the inner surface of the annular assembly to be injected with glue and the thermal expansion nonmetallic block 2;
in a preferred embodiment, the thermally expandable nonmetallic segment 2 has the following characteristics: at normal temperature, an annular gap is formed between the inner surface of the annular component to be injected with the adhesive and the thermal expansion nonmetallic block; at the glue injection temperature, the thermal expansion nonmetallic blocks 2 expand to apply a certain pressure on the inner wall of the annular assembly to meet the glue injection requirement.
The expansion of the thermal expansion nonmetallic block 2 is a material with high thermal expansion coefficient, and the requirements of the glue injection process are met by the following performance characteristics:
the temperature resistance level of the first, thermally expandable nonmetallic block 2 meets the high temperature requirements in the process, such as a maximum temperature of 65 ℃ in the pole protection layer forming process, and the thermally expandable nonmetallic block 2 needs to be able to withstand this temperature without significant aging in this temperature environment. Of course, the highest temperatures in the magnetic pole protective layer forming process of different motor rotor assemblies may be different, the performance parameters of the thermal expansion nonmetallic blocks 2 also have differences, and materials of the thermal expansion nonmetallic blocks 2 which meet the practical application conditions are selected according to the practical requirements of products and processes.
The thermal expansion coefficient of the second, thermally expanding nonmetallic block 2 should satisfy: at normal temperature, a first preset distance between the thermal expansion nonmetallic block 2 and the annular assembly can enable the thermal expansion nonmetallic block 2 to be placed in an inner ring of the annular assembly, and when the thermal expansion nonmetallic block 2 is at the glue injection temperature, the thermal expansion nonmetallic block 2 expands to apply a certain pressure on the inner wall of the annular assembly so as to meet the glue injection requirement;
typically, metals have a coefficient of thermal expansion of 1.2 x 10 -5 Proved by researches and experiments, the material needs to meet the requirement of more than 8-10 times of the expansion coefficient of metal, so that the material is easy to be installed into the inner ring of the annular assembly in a non-expansion state, the pressure between the material and the inner wall of the rotor 1 after expansion is easy to control, and the shrinkage is large during cooling shrinkage, so that the tool is convenient to detach.
S3, configuring the lower end of the annular gap to form a glue injection port for communicating with glue injection equipment, and configuring the other end of the annular gap to form an exhaust port for communicating with vacuumizing equipment.
Specifically, the configuration mode of the exhaust port may include: sealing the upper end part of the annular gap by using a sealing film, and then opening an exhaust port on the sealing film; wherein the upper end of the annular gap is preferably the rotor 1 near the top of the nacelle side pole piece.
Correspondingly, the glue injection port is arranged at the bottom of the annular gap.
Preferably, the glue is injected when the rotor 1 is vertically placed, that is, the axial direction of the rotor 1 is vertical, and when the glue is injected, the glue flows in from a glue injection port at the bottom of the rotor 1, and the annular gap is filled from bottom to top to form a magnetic pole protection layer. The quality of the magnetic pole protective layer formed in this way is higher, the internal gap is also greatly reduced, and meanwhile, the erosion of external water vapor or other corrosive gases can be avoided during use.
S4, heating the annular assembly and the thermal expansion nonmetallic block 2 to the glue injection temperature, controlling glue injection equipment to inject glue between the inner surface to be glued of the annular assembly and the thermal expansion nonmetallic block 2, and controlling vacuum pumping equipment to vacuumize the annular gap.
The evacuation apparatus is not described in detail herein, and is a well-established apparatus in the prior art.
When the glue solution is filled, the time for filling the glue solution needs to be controlled, if the time is too short, the rising speed of the glue solution is too high, the glue solution can wrap bubbles in the glue solution, the protection effect is affected after curing, if the time is too long, the glue solution can start a crosslinking reaction, the viscosity of the glue solution is increased, heat is released, the crosslinking and curing of the glue solution can be further promoted, the glue solution is difficult to fill and the filling is incomplete, so that the time for filling the glue solution is preferably controlled to be 8-12 minutes.
S5, after the glue injection is completed and the magnetic pole protective layer is formed, cooling the thermal expansion nonmetallic block 2 and the annular assembly with the magnetic pole protective layer to a preset temperature so as to separate the outer wall of the thermal expansion nonmetallic block 2 from the formed magnetic pole protective layer.
That is, the thermally expanded nonmetallic block 2 in the present invention contracts and can be detached from the pole protective layer when the temperature is lowered.
In a preferred embodiment, in order to enable the thermally expandable nonmetallic block 2 to be smoothly detached from the magnetic pole protection layer, the outer surface of the thermally expandable nonmetallic block 2 may be coated with a release agent before the thermally expandable nonmetallic block 2 is placed on the inner ring of the annular assembly. The release agent may be pasty or liquid, as long as the formation of the magnetic pole protective layer is not affected and the thermally-expanded nonmetallic block 2 and the magnetic pole protective layer are smoothly released.
In another embodiment, the lower the friction coefficient of the outer surface of the thermal expansion nonmetallic block 2, the easier the thermal expansion nonmetallic block 2 is separated from the magnetic pole protective layer, and in the outer rotor glue injection process applied in the application, the research proves that the friction coefficient of the outer surface of the thermal expansion nonmetallic block 2 is preferably in the range of 0.015-0.2.
In the above embodiments, the thermally expandable nonmetallic blocks 2 include one or several of tetrafluoroethylene, modified nylon, or polyethylene.
The room temperature is herein about 20-22 ℃. At room temperature, the space between the inner surface of the annular component to be injected with the thermal expansion nonmetallic block 2 is 6mm-10mm, and the space can simplify the earlier-stage sleeving procedure of the tool and the operation of cooling and taking out the thermal expansion nonmetallic block 2.
Because the expansion coefficients and the sizes of different tooling materials are different, the clearance values between the size of the thermal expansion nonmetallic block 2 and the size of the rotor 1 are also different, some adjustment is needed according to the different materials, and the tooling size is changed along with the size of the rotor 1; and increase the sealing function of one or more O type sealing rings as the metal contact surface at the outer peripheral wall of the thermal expansion nonmetallic slab 2, after the thermal expansion nonmetallic slab 2 is heated and expanded, O type sealing rings can be used for the auxiliary sealing effect to the annular clearance, and can also prevent the protective resin from flowing outwards, the position where O type sealing rings are placed is determined according to the lowest position of the glue injection, and the optimal arrangement can be at the bottom of the outer peripheral wall of the thermal expansion nonmetallic slab 2.
In a preferred embodiment, the glue solution is filled up from the lower part of the annular gap when the glue is injected in each of the above embodiments, and a predetermined pressure is applied to the pipe through which the glue solution is transferred to the glue injection port, the predetermined pressure being greater than the gravity value of the resin injected into the annular gap.
In one particular rotor 1 glue injection process, the predetermined pressure of the glue is about 2 atmospheres gauge. Of course, the predetermined pressure may be adjusted according to the different rotors 1.
Thus, the flowing force of the glue solution can be increased to form a high-quality magnetic pole protection layer.
Heating the annular assembly and the thermal expansion nonmetallic block 2 to the glue injection temperature, wherein before glue injection, the pressure value range between the annular assembly and the thermal expansion nonmetallic block 2 is as follows: 0.1Mpa-0.2Mpa.
Specifically, the annular assembly and the thermally expandable nonmetallic block 2 will be maintained at the injection temperature for a predetermined period of time prior to injection, during which the pressure value between the annular assembly and the thermally expandable nonmetallic block 2 is maintained at: 0.1Mpa-0.2Mpa. Thus being beneficial to the uniform heating of the thermal expansion nonmetallic block 2 and the annular component, and simultaneously enabling the two to be contacted uniformly, and being beneficial to the molding quality of the magnetic pole protective layer.
The baking predetermined period may be selected according to parameters such as the size of the rotor 1, the heat capacity of the rotor 1, the thermal expansion rate of the thermal expansion nonmetal, and the like, and is generally 2 hours to 3 hours, and is of course not limited to the above description, but the baking time may be relatively short if the size is relatively small, and the baking time may be relatively long if the size of the product is relatively large. The baking is primarily performed for a predetermined period of time by allowing the thermally expansive non-metal to exert a certain pressure or force on the inner wall of the annular assembly.
As can be seen from the above description, the molding method of the magnetic pole protective layer in the motor rotor assembly provided by the invention utilizes the thermal expansion and cold contraction of the thermal expansion nonmetallic block 2 to realize the glue injection requirement and the automatic separation of the thermal expansion nonmetallic block 2 and the magnetic pole protective layer after glue injection, and auxiliary glue injection components such as a vacuum bag film, a stripping cloth, a diversion net and the like are not required, so that the preparation process before glue injection is simplified, the workload is greatly reduced, and the glue injection period is shortened; in addition, the forming method of the invention controls the pressure between the thermal expansion nonmetallic block 2 and the inside of the annular component, so that the magnetic pole protective layer is more compact and has high solid heat transfer speed, and the high-quality magnetic pole protective layer can be formed by only one glue injection, thereby further shortening the production period. In addition, after the glue injection is finished, the thermal expansion nonmetallic block 2 and the magnetic pole protective layer are naturally separated, and almost no resin remains on the surface of the thermal expansion nonmetallic block 2, so that hazardous waste is greatly reduced, the cost is reduced, and the environment is protected.
The method for forming the magnetic pole protective layer in the motor rotor assembly provided by the invention is described in detail. The principles and embodiments of the present invention have been described herein with reference to specific examples, the description of which is intended only to facilitate an understanding of the method of the present invention and its core ideas. It should be noted that it will be apparent to those skilled in the art that various modifications and adaptations of the invention can be made without departing from the principles of the invention and these modifications and adaptations are intended to be within the scope of the invention as defined in the following claims.
Claims (9)
1. The forming method of the outer rotor magnetic pole protective layer of the motor is characterized by comprising the following steps:
assembling parts at least comprising a magnetic pole part, a pressing strip and a rotor to form an outer rotor annular assembly;
the thermal expansion nonmetallic blocks are arranged in the inner ring of the annular assembly, and an annular gap is formed between the inner surface of the annular assembly to be injected with glue and the thermal expansion nonmetallic blocks;
the lower end of the annular gap is configured to form a glue injection port for communicating with glue injection equipment, and the other end of the annular gap is configured to form an exhaust port for communicating with vacuumizing equipment;
heating the annular component and the thermal expansion nonmetallic block to the glue injection temperature, controlling the glue injection equipment to inject glue between the inner surface to be glued of the annular component and the thermal expansion nonmetallic block, and simultaneously controlling the vacuumizing equipment to vacuumize the annular gap;
after the glue injection is completed and the magnetic pole protective layer is formed by solidification, cooling the thermal expansion nonmetallic block and the annular assembly with the magnetic pole protective layer to a preset temperature so as to separate the outer wall of the thermal expansion nonmetallic block from the formed magnetic pole protective layer; the thermally expansive non-metal has the following characteristics: at normal temperature, an annular gap is formed between the inner surface of the annular component to be injected with the adhesive and the thermal expansion nonmetallic block; at the glue injection temperature, the thermal expansion nonmetallic blocks expand and exert certain pressure on the inner wall of the annular assembly to meet the glue injection requirement; heating the annular assembly and the thermal expansion nonmetallic block to the glue injection temperature, wherein before glue injection, the pressure value range between the annular assembly and the thermal expansion nonmetallic block is as follows: 0.1Mpa-0.2Mpa.
2. The method for forming a pole protection layer of an outer rotor of a motor according to claim 1, wherein the configuration mode of the exhaust port specifically includes: sealing the upper end part of the annular gap by using a sealing film, and then opening the exhaust port on the sealing film; wherein the upper end of the annular gap is the rotor near the top of the nacelle-side pole piece.
3. The method of forming a pole shield for an outer rotor of a motor of claim 1 wherein said thermally expandable nonmetallic blocks are further coated with a mold release agent on an outer surface of said thermally expandable nonmetallic blocks prior to placement in an inner ring of said annular assembly.
4. The method of forming a pole shield for an outer rotor of a motor of claim 1, wherein the thermally expanded non-metallic block comprises one or more of tetrafluoroethylene, modified nylon, or polyethylene.
5. The method of forming a pole shield for an outer rotor of a motor as claimed in claim 1, wherein the coefficient of friction of the outer surface of the thermally expanded non-metallic block is in the range of 0.015 to 0.2.
6. The method of forming a pole shield for an outer rotor of a motor as claimed in claim 1, wherein said annular assembly and said thermally expandable nonmetallic block are maintained at said glue injection temperature for a predetermined period of time for baking, during which baking a pressure value between said annular assembly and said thermally expandable nonmetallic block is maintained at: 0.1Mpa-0.2Mpa.
7. The method of forming a pole shield of an outer rotor of a motor as claimed in claim 1, wherein the glue solution is filled upward from a lower portion of the annular gap during the glue injection, and a predetermined pressure is applied to a pipe through which the glue solution is transferred to the glue injection port, the predetermined pressure being greater than a gravity value for filling the annular gap with the resin.
8. The method of forming a pole shield for an outer rotor of a motor as claimed in claim 7, wherein the time for filling the glue solution is controlled to be within 10 minutes.
9. The method for forming a pole shield of an outer rotor of a motor as claimed in claim 1, wherein a space between an inner surface of the annular assembly to be injected with the adhesive and the thermally expandable nonmetallic block is 6mm to 10mm at room temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910989148.5A CN110676986B (en) | 2019-10-17 | 2019-10-17 | Forming method of magnetic pole protective layer of motor outer rotor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910989148.5A CN110676986B (en) | 2019-10-17 | 2019-10-17 | Forming method of magnetic pole protective layer of motor outer rotor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110676986A CN110676986A (en) | 2020-01-10 |
| CN110676986B true CN110676986B (en) | 2024-02-27 |
Family
ID=69082884
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910989148.5A Active CN110676986B (en) | 2019-10-17 | 2019-10-17 | Forming method of magnetic pole protective layer of motor outer rotor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110676986B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112910203B (en) * | 2021-04-02 | 2022-10-21 | 威海锦阳电子有限公司 | Manufacturing method of outer rotor of motor |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62118733A (en) * | 1985-11-19 | 1987-05-30 | Japan Servo Co Ltd | Preparation of stator for miniature motor |
| CN106515043A (en) * | 2016-10-31 | 2017-03-22 | 北京金风科创风电设备有限公司 | Forming process for permanent magnet motor magnetic pole protective coatings and processing equipment |
| JP2017112733A (en) * | 2015-12-16 | 2017-06-22 | オムロン株式会社 | Brushless motor |
| CN107800213A (en) * | 2017-10-17 | 2018-03-13 | 天津飞旋高速电机科技有限公司 | Combined high-speed permanent magnet machine rotor and its manufacture method |
| CN107979247A (en) * | 2017-12-20 | 2018-05-01 | 明阳智慧能源集团股份公司 | Built-in type permanent-magnet generator magnet steel is inserted into the frock and process for filling colloid of magnetic pole box |
| CN109909113A (en) * | 2019-04-22 | 2019-06-21 | 葛素珍 | A kind of stator glue-pouring device |
-
2019
- 2019-10-17 CN CN201910989148.5A patent/CN110676986B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62118733A (en) * | 1985-11-19 | 1987-05-30 | Japan Servo Co Ltd | Preparation of stator for miniature motor |
| JP2017112733A (en) * | 2015-12-16 | 2017-06-22 | オムロン株式会社 | Brushless motor |
| CN106515043A (en) * | 2016-10-31 | 2017-03-22 | 北京金风科创风电设备有限公司 | Forming process for permanent magnet motor magnetic pole protective coatings and processing equipment |
| CN107800213A (en) * | 2017-10-17 | 2018-03-13 | 天津飞旋高速电机科技有限公司 | Combined high-speed permanent magnet machine rotor and its manufacture method |
| CN107979247A (en) * | 2017-12-20 | 2018-05-01 | 明阳智慧能源集团股份公司 | Built-in type permanent-magnet generator magnet steel is inserted into the frock and process for filling colloid of magnetic pole box |
| CN109909113A (en) * | 2019-04-22 | 2019-06-21 | 葛素珍 | A kind of stator glue-pouring device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110676986A (en) | 2020-01-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10079529B2 (en) | Method for manufacturing core of rotating electric machine | |
| CN104272566A (en) | Method for potting a stator | |
| CN100519128C (en) | High-pressure high-capacity reactor iron core cake casting technics | |
| EP3027373B1 (en) | Mould for a wind turbine component | |
| US9613751B2 (en) | Coil support members | |
| CN110676986B (en) | Forming method of magnetic pole protective layer of motor outer rotor | |
| KR102314958B1 (en) | Apparatus and method for molding and solidifying prefabricated articles | |
| CN104149365A (en) | Microwave curing method and microwave curing device of composite shaft part | |
| WO2019104990A1 (en) | Process device and method for curing and forming magnetic pole protective coating | |
| WO2019104991A1 (en) | Process device and method for curing and forming magnetic pole protective coating | |
| KR20120111132A (en) | Curing process of pressure or vacuum for pressure vessel of wet filament winding | |
| CN102468725A (en) | Process for encapsulating stator coil in motor | |
| JP5993294B2 (en) | Die-cast sleeve molten metal supply device and method for supplying the same | |
| US20220088838A1 (en) | Method and device for heating a mould | |
| CN107317444A (en) | The stator and rotor epoxy sealing technique of disc type magnetic generator | |
| CN109617345A (en) | A kind of stator module epoxy casting tool and operating method | |
| JP2016078033A (en) | Vacuum casting apparatus mold and vacuum casting apparatus using the same | |
| CN113183370B (en) | Progressive curing device and method with controllable temperature gradient thermal field | |
| CN101177031B (en) | Plastic forming method and device thereof | |
| CN114582730B (en) | Method for preparing high-performance aluminum matrix composite heat dissipation substrate | |
| JP2001341142A (en) | Casting device | |
| KR101729396B1 (en) | blind feeder efficiency improvement device with thermit member | |
| CN100434252C (en) | Plastic shaping method and apparatus thereof | |
| CN113123897A (en) | Method for forming explosive column fixing frame of combustion chamber of solid rocket engine | |
| KR101729397B1 (en) | blind feeder efficiency improvement method with thermit member |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: 830026 No. 107, Shanghai Road, Urumqi economic and Technological Development Zone, the Xinjiang Uygur Autonomous Region Applicant after: Jinfeng Technology Co.,Ltd. Address before: 830026 No. 107, Shanghai Road, Urumqi economic and Technological Development Zone, the Xinjiang Uygur Autonomous Region Applicant before: XINJIANG GOLDWIND SCIENCE & TECHNOLOGY Co.,Ltd. |
|
| CB02 | Change of applicant information | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20231027 Address after: 100176 19 Kangding street, Beijing economic and Technological Development Zone, Daxing District, Beijing Applicant after: Beijing Goldwind Science & Creation Windpower Equipment Co.,Ltd. Address before: 830026 No. 107, Shanghai Road, Urumqi economic and Technological Development Zone, the Xinjiang Uygur Autonomous Region Applicant before: Jinfeng Technology Co.,Ltd. |
|
| TA01 | Transfer of patent application right | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |