WO2019104990A1 - Process device and method for curing and forming magnetic pole protective coating - Google Patents

Abstract

A process device and method for curing and forming a magnetic pole protective coating. The process device comprises a first energy transfer system and a second energy transfer system. The first energy transfer system comprises: a first limiting support part (100) facing a first surface of a magnetic yoke (41) and spaced from a magnetic pole (43) at a predetermined distance to form a first accommodating space; a first elastic cavity part (200) which is a flexible sealed cavity, provided on the first limiting support part (100), and located in the first accommodating space; and a first fluid medium supply system (600) communicated with the first elastic cavity part (200) and used for supplying a pressurized fluid medium to the first elastic cavity part (200) or pressurizing and heating the fluid medium. The target of consistent temperature rising control and uniform temperature distribution of magnetic pole protection formation quality is achieved, so that the stress in a magnetic pole protection coating during its formation process is eliminated, the formation quality is ensured, and the risks of stripping and breakage caused by the stress during a subsequent application process are reduced.

Description

Process equipment and method for magnetic pole protective coating curing molding Technical field

The present disclosure relates to the field of wind turbine technology, and more particularly to a process equipment and method for rotor pole protection coating curing of large wind turbines.

Background technique

The large outer-drive permanent magnet wind turbine outer rotor of the prior art is formed by fixing a permanent magnet pole piece to the rotor yoke wall.

As shown in FIGS. 1-2, the outer rotor permanent magnet motor includes a stator core 30 disposed on a stator main shaft, and a rotor 40 disposed on the outer circumference of the stator core 30. The rotor 40 includes a rotor yoke 41, a bead 42 and a magnetic pole 43. The yoke 41 is generally of a cylindrical structure, and after the bead 42 is attached to the inner peripheral wall of the yoke 41 by a fastener such as a bolt 44 penetrating inward from the radially outer side of the yoke 41, the magnetic pole 43 is pushed adjacently. Between the strips 42. The cross-section of the bead 42 is trapezoidal so that the magnetic poles 43 can be secured between adjacent beadings 42 by the bevel of the bead 42 against the side walls of the magnetic poles 43. The exposed portion of the head of the bolt 44 in contact with the air is protected by a sealant filling cover, between the magnetic pole 43 and the magnetic pole 43, between the magnetic pole 43 and the bead 42, the gap between the magnetic pole 43 and the yoke 41, and the magnetic pole 43. The surface of the bead 42 is filled with a potting resin to form a protective coating 45 to protect the magnetic poles 43. Figure 3 shows a rotor 40 of another configuration. In this configuration, the bolt 44 penetrates into the bead 42 and the yoke 41 from the inner surface of the yoke 41 in the radially outward direction, thereby fixing the bead 42 to the inner wall of the yoke 41. The pole guard coating 45 covers the exposed head of the bolt 44 while covering the pole 43 and the bead 42.

In the prior art, the magnetic pole of the permanent magnet motor is more susceptible to oxidation and electrochemical corrosion in the hot and humid environment, and the iron and bismuth in the neodymium iron boron are caused to cause changes in magnetic properties or even magnetic pole damage.

In the prior art, a protective coating 45 is usually formed on the surface of the magnetic pole by a resin to isolate the magnetic pole from the outside and protect the magnetic pole 43.

4 shows a schematic view of a vacuum infusion process apparatus for forming a pole guard coating 45 in the prior art. The vacuum infusion process apparatus includes a vacuum bag 50, a vacuum pump 53, a resin tank 54, a suction line 55, an extraction line 56, and a resin collection tank 57. After the magnetic pole 43 is fixed to the inner wall of the yoke 41 by the bead 42, the vacuum bag 50 is laid on the magnetic pole 43, and the reinforcing fiber cloth 51 is also laid inside the vacuum bag 50. A filling cavity is formed between the vacuum bag 50 and the inner wall of the yoke 41, that is, the adhesive, the bead 42, the magnetic pole 43, the inner surface of the yoke 41, and the reinforcing fiber cloth 51 are bonded and solidified into a single bond. Mixing space. A bead 42, a magnetic pole 43, and a reinforcing fiber cloth 51 laid on the surface of the bead 42 and the magnetic pole 43 are covered inside the perfusion cavity. An inlet is opened in the lower portion of the filling cavity and connected to the suction line 55, and an outlet connection lead-out line 56 is opened in the upper portion of the filling cavity. The filling cavity is evacuated by a vacuum pump 53 to compact the reinforcing fiber cloth 51 on the surface of the bead 42 and the magnetic pole 43, and the adhesive (resin added with a curing agent) is vacuum-infused into the cavity. The resin enters from the resin tank 54 from the lower end of the pouring cavity along the suction line 55, and impregnates the gap between the fiber-reinforced fiber cloth 51, the filling magnetic pole 43 and the bead 42 and the inner wall of the yoke 41 while flowing in the axial direction toward the other end. And covering the surface of the magnetic pole 43 and the bead 42 after the adhesive fills the gap and the gap of the entire cavity, so that the adhesive fully wets the surface of the bonded solid in the adhesive mixing space, and then adheres The agent mixing space is heated to cure the adhesive, so that the adhesive forms a resin-based reinforcing material protective coating 45 on the surface of the magnetic pole 43 while filling the respective voids and slits.

In the prior art, in order to control the shape of the protective coating 45 and the thickness of the protective coating 45, an adhesive mold 60 is further provided inside the yoke 41 of the rotor. The bonding mold 60 is located radially inward of the vacuum bag 50, and maintains a predetermined gap with the magnetic poles 43, thereby controlling the amount of the adhesive to be poured and the thickness of the protective coating 45.

Although the protective coating 45 provides a good protection to the magnetic pole components to a certain extent, the magnetic poles 43 are isolated from the external moisture. However, during long-term use, the moisture of the surrounding environment can cause chemical changes in the reinforcing fibers and the adhesive matrix in the protective coating 45, causing the performance of the reinforcing fibers and the adhesive matrix to decrease, and the moisture can enter the protective coating by diffusion. The interface between the layer 45 and the bead 42 and the yoke 41 causes peeling of the bonding interface, resulting in a decrease in mechanical properties of the material. The adhesive will shrink in an environment where temperature and humidity change, resulting in mismatch deformation and mismatch stress, affecting deformation of the structure of the protective coating 45 and damage of the material.

Further, during the rotation of the rotor 40, the magnetic pole 43 is interposed between the adjacent two pieces of the bead 42 by the magnetic pulling force of the radial pulsation of the motor stator armature and the torque of the inner wall of the yoke 41. The simple vibration becomes turbulent, which further exacerbates the peeling of the bonding interface between the magnetic pole 43 and the adhesive, peeling off the protective coating, and breaking. After the magnetic pole protection coating 45 is broken, the breathing phenomenon occurs rapidly, the wet air and the salt mist cause corrosion to the magnetic pole, the size of the magnetic pole 43 changes, the magnetic pole 43 loosens, and the magnetic pole strip 42 jumps out under the action of the radial magnetic pulling force. The gap between the generator rotor 40 and the stator 30 is entered, the relative movement of the stator 30 and the rotor 40 of the motor is prevented, the insulation of the magnetic pole and the stator is destroyed, and the motor is scrapped, causing great loss.

Therefore, the performance of the protective coating 45 directly determines the service life of the wind power generator, and the temperature of the vacuum infusion process and the curing process of the adhesive directly affects the performance of the protective coating 45.

In the prior art adhesive vacuum infusion process, the glue injection port is disposed at a lower portion of the vacuum bag, and the vacuum pump suction port is disposed at an upper portion of the vacuum bag, and after the vacuum bag is evacuated, the glue liquid in the glue bottle is filled. It will enter the vacuum bag under the action of negative pressure and seep from the lower part to the upper part. However, since the pressure near the injection opening is still close to the ambient pressure, the internal and external pressure difference in the lower portion of the vacuum bag is smaller than the internal and external pressure difference in the upper portion of the vacuum bag, thereby causing a certain hindrance to the flow of the adhesive from the bottom to the top. Further, since the adhesive lacks the bleeding force in the radial direction, it is difficult to enter the narrow gap between the magnetic pole 43, the bead 42, and the yoke 41, and in particular, it is difficult to pass the magnetic pole 43 and the bead 42 into the magnetic pole 43 and the yoke 41. In the gap between the two, the gap between the magnetic pole 43 and the yoke 41 is formed, which becomes a safety hazard of the magnetic pole falling off. Therefore, the prior art adhesive does not sufficiently permeate and wet the bonded solid surface.

Fig. 5 shows a prior art process equipment for bonding and curing a magnetic pole protective coating. In the process equipment, after the magnetic pole pushing step and the glue injection step are performed between the motor rotor yoke wall 41 and the bonding mold 60, the far yoke electric heating device is used to radiate the rotor yoke 41 from the outer surface of the rotor. After heating, the rotor yoke 41 is heated, and then the adhesive mixing space 4 is heated by heat conduction to cure the adhesive. After the curing of the adhesive is completed and the bonding mold 60 is retracted to cool the adhesive, the amount of shrinkage on both sides of the adhesive layer is largely different, and the adhesive layer around the magnetic pole itself remains internal stress, and one side is relatively Relaxation, one side is relatively tight, resulting in the existence of internal stress in the formed protective coating, which is one of the important reasons for the cracking and peeling of the protective coating caused by the thickness of the mold.

Fig. 6 shows another process equipment used in the prior art for bonding and curing a magnetic pole protective coating. The process is equipped with a closed-type hot air circulation heating furnace, and by using a far-infrared radiant heater as a heat source, the outer surface of the cylindrical wall of the yoke 41 of the rotor and the outer surface of the bonding mold 60 are subjected to convective heat transfer of the hot air. Heat exchange with far infrared radiation. The process apparatus controls the temperature of the adhesive mixing space by simultaneously controlling the temperature of the outer surface of the cylindrical wall of the rotor yoke 41 and the temperature of the outer side of the bonding mold 60, which is relatively uniform compared with the process apparatus shown in FIG. The adhesive mixing space 4 is heated, but there are still defects such as uneven heating temperature of the adhesive mixing space and large heat consumption.

Further, in the prior art heating apparatus, there are a plurality of components which are not required to be heated, and a large amount of heat is absorbed, for example, a member supporting the rotor of the tapered support frame 2, the bonding mold 60, and the like. The large amount of heat absorption of these components causes unnecessary consumption and waste of heat.

Summary of the invention

In order to solve the above problems in the prior art, the present disclosure provides a process apparatus for bonding and curing a permanent magnet component protective coating to promote the seepage and infiltration of the adhesive on the surface of the bonded object. The curing stage makes the heating temperature of the adhesive uniform and uniform, solidifies at a better curing temperature, reduces the internal stress of the protective coating, reduces the heat consumption during the heating process, and reduces the process cost.

The present disclosure provides a process apparatus and method for magnetic pole protective coating solidification molding, which solves the problem that the anti-corrosion protective coating forming process of the permanent magnet motor magnetic pole is heated in the 360 degree range, the magnetic pole and the yoke height direction Heat consistency issues.

According to an aspect of the present disclosure, there is provided a process apparatus for solidifying a magnetic pole protective coating of a motor rotor, the motor rotor including a yoke and a magnetic pole fixedly mounted on a diameter of the yoke On the first surface of the first side, the surface of the magnetic pole is covered with a vacuum bag for forming an adhesive mixing space in which the adhesive is mixed with the magnetic pole and the yoke and solidified, and the process equipment includes An energy transfer system, the first energy transfer system includes: a first limiting support member facing the first surface of the yoke, spaced apart from the magnetic pole by a predetermined distance to form a first receiving space; the first elastic cavity a body member, which is a flexible sealing cavity, disposed on the first limiting support member and located in the first receiving space; a first fluid medium supply system communicating with the first elastic cavity member for Supplying a pressurized fluid medium or a pressurized heating fluid medium to the first elastic cavity member to cause the first elastic cavity member to press an adhesive impregnated in the vacuum bag; wherein the first bomb The cavity member is annular and includes a plurality of annular passages stacked in an axial direction of the rotor, the plurality of annular passages being independent of each other, each annular passage having a fluid medium inlet and a fluid medium outlet, respectively The fluid medium inlet and the fluid medium outlet are in communication with the first fluid medium supply system, respectively.

In accordance with another aspect of the present disclosure, a process apparatus for curing an adhesive layer is provided, the adhesive layer being coated on a first surface of a component, the process apparatus including a first energy transfer The first energy transfer system includes: a first limiting support member; the first elastic cavity member being a flexible closed cavity disposed on the first limiting support member facing the component a surface; a first fluid medium supply system in communication with the first elastomeric cavity member for supplying a pressurized fluid medium or a pressurized heating fluid medium to the first elastomeric cavity member to compress the bond a primer layer; wherein the first elastomeric cavity component includes a plurality of channels in parallel, the plurality of channels being in communication with the first fluid medium supply system, respectively.

According to still another aspect of the present disclosure, there is provided a method for solidifying a magnetic pole protective coating for a rotor of a motor, the method being divided into a vacuum infusion process, a pressurized percolation process, a heat curing process, and a cooling and stress according to a process time. a relaxation process, the method comprising a vacuum infusion process and a pressurized percolation process, and comprising the steps of: performing the vacuum infusion process, injecting an adhesive into the vacuum bag by a vacuum infusion process; performing the pressurized percolation process Filling the first elastic cavity member with a pressurized fluid medium by the first fluid medium supply system, so that the first elastic cavity member flexibly presses the adhesive in the vacuum bag; The heat curing process is performed, and the adhesive mixing space is heated to cure the adhesive; the cooling and stress relaxation processes are performed to gradually cool the adhesive mixing space to room temperature.

According to the technical solution of the present disclosure, the goal of uniformizing the temperature rise control of the magnetic pole protection molding and uniformizing the temperature distribution is achieved, so that the stress of the magnetic pole protection layer itself is eliminated, the molding quality is ensured, and the peeling and fracture caused by the stress during the later use process are reduced. After the magnetic pole protection layer breaks, the breathing phenomenon occurs rapidly, and the wet air and salt spray cause corrosion. The size of the magnetic steel changes, and it will jump out of the magnetic pole under the magnetic pole strip and enter the air gap to prevent the relative motion of the motor stator and rotor. Destroy the magnetic pole and stator insulation, the motor is scrapped. In addition to the direct cost, the cost of replacing the motor is several hundred thousand yuan.

In addition, the pressure-bonding operation promotes the impregnation of the fibers by the liquid binder, the surface of the impregnated magnetic steel and the surface of the yoke, the seepage of the gap, and the optimization of the curing process, providing thermal curing safety and reducing the risk of magnetic pole loss.

DRAWINGS

The above and other objects and features of the present disclosure will become more apparent from the detailed description of the embodiments of the invention which

1 is a schematic structural view of an outer rotor of a permanent magnet motor in the prior art;

Figure 2 is a partial structural view of the outer rotor of Figure 1;

3 is a partial structural schematic view of another rotor structure in the prior art;

4 is a schematic view of a vacuum infusion system for forming a magnetic pole protective coating in the prior art;

5 and FIG. 6 are schematic views of a prior art heating device for bonding and curing a magnetic pole protective coating;

7-12 are schematic views of a process apparatus for magnetic pole protective coating bonding curing molding according to a first exemplary embodiment of the present disclosure;

FIG. 13 is a schematic diagram of a sensor arrangement in an elastic cavity component in accordance with an exemplary embodiment of the present disclosure; FIG.

14 is a schematic diagram of a pressure curve and a magnetic pole guard coating temperature profile in a process of forming a magnetic pole protective coating using a process apparatus according to an embodiment of the present disclosure;

15 is a schematic view of a process apparatus for magnetic pole protective coating bonding curing molding according to a second exemplary embodiment of the present disclosure;

Figure 16 is a schematic view of step pressurization using a process apparatus according to a second embodiment of the present disclosure;

17 is a schematic view of step relief using a process apparatus according to a second embodiment of the present disclosure.

Reference numerals in the drawings:

2-stator bracket; 4-adhesive mixing space; 30-stator core; 40-rotor; 41-yoke; 42-pressing strip; 43-magnetic pole; 44-bolt; 45-magnetic pole protective coating; Bag; 53-vacuum pump; 54-resin tank; 55-suction line; 56-extraction line; 57-resin collection tank; 60-bonding mold;

100-first limit support member; 110, 120, 410, 420-limit pressure plate; 200-first elastic cavity member; 210-first side wall; 220-second side wall; 230-separation band; - fluid medium passage; 250 - boundary before expansion of the first elastic cavity member; 300 - second elastic cavity member; 400 - second limit support member; 500 - controller; 510 - pressure sensor; 520 - temperature sensor ;

600-fluid medium supply system; 610-compressor; 620-heater; 630-first connecting pipe; 640-fluid conveying line; 650-fluid recovery line 650; 660-bypass line; 641-first Valve; 651-second valve; 652-third valve; 631-fourth valve; 661-fifth valve; 662-sixth valve; 642-first pressure gauge; 653-second pressure gauge; 645-split Pipe; 655-return mother pipe; 7, 9, 11, 13, 15, 17-split pipe valve; 6, 8, 10, 12, 14, 16, 18-return pipe valve.

Detailed ways

For the outer rotor, the process equipment for the magnetic pole protective coating solidification molding may include a first energy transfer system for heating the adhesive mixing space from the inner side (magnetic pole side) of the rotor and the outer side of the rotor (the yoke side) a second energy transfer system that heats the adhesive mixing space. The process apparatus for protective coating curing molding according to an embodiment of the present disclosure may include only a first energy transfer system for pressurizing the adhesive mixing space from one side, and may also include The adhesive mixing space is subjected to pressure heating of the first energy transfer system and the second energy transfer system. According to an embodiment of the present disclosure, the second energy transfer system may heat the rotor yoke by using a heating fluid medium circulating in the elastic medium space in the same or similar manner as the first energy transfer system, or may be Various heating methods known in the art, such as radiant heating, electromagnetic induction heating, electrically heated film heating, and the like.

Further, the process apparatus according to an embodiment of the present disclosure is not limited to the protective coating solidification molding process applied to the outer rotor, and may also be used for the protective coating solidification molding process of the inner rotor. In addition, in addition to the protective coating curing process for the rotor of the motor, it can be applied to any similar situation in which the adhesive is cured. According to an embodiment of the present disclosure, when only the adhesive mixing space needs to be heated from one side due to structural constraints or process requirements, only one of the first energy transfer system and the second energy transfer system may be employed. The adhesive layer is heated. Furthermore, it is also possible to use only the first energy transfer system or the second energy transfer system according to the present disclosure to pressurize only the adhesive layer or only the adhesive layer. The process apparatus of the present disclosure has no limitation on the surface shape of the protective coating cured molding except for the cylindrical rotor of the embodiment of the present disclosure, because the elastic cavity member of the present disclosure is flexible and thus conformal, thereby It can be used to form a protective coating on the surface of various irregularly shaped or regularly shaped components.

In the following description, a magnetic pole protective coating curing forming of an outer rotor is taken as an example to describe a process apparatus for magnetic pole protective coating solidification molding according to an embodiment of the present disclosure, and is described in detail for the inner side (magnetic pole side) pair of the outer rotor. The first energy transfer system for pressurized heating of the adhesive mixing space. Compared with the prior art process equipment, the process equipment according to the embodiment of the present disclosure dispenses with the bonding mold 60, and no longer indirectly heats the adhesive mixing space by the bonding mold 60, but uses annular elasticity. The compressed medium cavity member flexibly squeezes the vacuum bag and heats the adhesive mixing space with a circulating flowing heated fluid medium.

7-12 are schematic illustrations of process equipment for magnetic pole protective coating cure forming in accordance with an embodiment of the present disclosure. As shown in Figures 7-12, the rotor 40 is placed vertically in the axial direction, for example, vertically on a horizontal work plane, and the magnetic poles 43 are fixed to the inner surface of the yoke 41 of the rotor by a bead 42. A vacuum bag (not shown) is applied to the outer surface of the magnetic pole 43 to form an adhesive infusion cavity. The first limit support member 100 is disposed at a predetermined radial inner side of the magnetic pole 43, and the first elastic cavity member 200 is disposed between the first limit support member 100 and the magnetic pole 43. The first limit support member 100 is a rigid member for supporting and holding the first elastic cavity member 200. When the pressurized fluid medium is filled into the first elastic cavity member 200, the first elastic cavity member 200 is expanded to flexibly squeeze the vacuum bag tightly.

The first limiting support member 100 is annular, and forms an annular gap, that is, a first receiving space, with the magnetic pole 43 to reserve a mounting and expanding space for the annular first elastic cavity member 200. The first limiting support member 100 may be made of a material having a low heat transfer coefficient. For example, a wooden board, a hard plastic plate or the like may be used to prevent heat from being transmitted radially outward. In addition, a heat insulating material may be applied outside the limit support member 100 to further increase the heat insulating performance. The first limit support member 100 may also be formed by a rigid skeleton and filled with a heat insulating material. For ease of installation, the first limit support member 100 may be divided into at least two pieces in the circumferential direction, preferably divided into four pieces. A modular joint can be formed between two adjacent sheets. Further, limit platens 110 and 120 may be provided at the upper and lower ends of the annular gaps to limit axial outward expansion and heat transfer of the first elastic cavity member 200. In the case where the magnetic pole 43 is mounted on the inner wall of the rotor, that is, in the case where the rotor 40 is an outer rotor, the outer periphery of the first limiting support member 100 is a convex surface, and the first elastic cavity member 100 is disposed at The first limit support member 100 is on the outer circumferential surface. When the rotor 40 is an inner rotor, the first elastic cavity member 200 is disposed on the inner circumferential surface of the first limit support member 100. Preferably, at least one of the first limiting support member 100 and the limit pressing plates 110 and 120 may be made of a transparent material to facilitate observation of the flow distribution state of the adhesive and the adhesive curing state.

The first elastic cavity member 200 may be a sealed bag made of flexible rubber or flexible plastic, disposed in the first receiving space between the limiting support member 100 and the vacuum bag. The first elastic cavity member 200 may have a first side wall 210 and a second side wall 220. The first side wall 210 is a radially outer side wall for contacting the vacuum bag laid on the magnetic pole 23 to squeeze the vacuum bag. Adhesive. The second side wall 220 is a radially inner side wall that is in contact with the surface of the first limiting support member 100. The first elastic cavity component 200 can be supported by the first limit support component 100. The first elastic cavity member 200 may be filled with a pressurized fluid medium of a predetermined temperature, such as air, water, oil, or the like. In the case where the first elastic cavity member 200 is filled with a pressurized fluid medium, the first elastic cavity member 200 can be in flexible contact with the rigid surface of the vacuum bag, and the adhesive in the vacuum bag is flexibly squeezed. The adhesive is diffused so as to sufficiently enter the gap between the magnetic pole 43 and the magnetic pole 43, the gap between the magnetic pole 43 and the bead 42, the gap between the magnetic pole 43 and the yoke 41, and the gap between the bead 42 and the yoke 41. The surface of the bonded solid is fully wetted and impregnated, and fully mixed with the laid reinforcing fiber cloth. At the same time, the thickness of the adhesive is uniform over the entire surface of the magnetic pole.

In the case where the first elastic cavity member 200 is made of a flexible rubber material (for example, PVDF) or a plastic material, a sensing member such as a temperature sensor 510, a piezoelectric sensor 520, or the like may be embedded in the first elastic cavity member 200 to Detect fluid medium temperature and pressure. The temperature sensor 510 and the piezoelectric sensor 520 disposed at different positions may be connected to the controller 500 through a data bus to transmit a temperature signal and a pressure signal to the controller 500, thereby integrally controlling heating temperatures and pressures of different portions. The first elastic cavity member 200 may be entirely made of a PVDF material to easily form the piezoelectric sensor 520. However, in order to save cost, it is also possible to provide the PVDF material only at a position where the piezoelectric sensor 520 needs to be disposed, and the other portion is made of a lower cost rubber or plastic.

The interior space of the first resilient cavity component 200 can be a single annular cavity, i.e., the interior space is not separated. However, the inner cavity of the first elastic cavity member 200 may also be partitioned into a plurality of annular passages 240 by the divider strip 230. The spacer tape 230 may be a ribbed flexible tape having a certain flexibility, and the two sides are respectively connected to the first side wall 210 and the second side wall 220 of the elastic cavity member 200. The plurality of annular passages 240 may be independent of each other or may be in communication with each other. In other words, each of the channels 240 may be connected in parallel to each other or may be connected in series. 7-14 illustrate an example of the series connection of the various channels of the first elastomeric cavity component 200. FIG. 15 shows an example in which the respective passages of the first elastic cavity member 200 are connected in parallel. Hereinafter, a process apparatus according to a first embodiment of the present disclosure will be described in detail with reference to FIGS. 7-14.

In the case where the respective layers of the channels 240 are connected in series, a spiral fluid medium passage wound around the outer side wall of the first limit support member 100 may be formed. The fluid medium passage may be coiled from the bottom to the top in a substantially spiral shape. In this case, each layer of the channel extends upward at a certain oblique angle, and thus not all are at the same height. However, each layer of channels can also be coiled one turn along the same height, and then the exit of the layer of channels is connected to the inlet of the adjacent channel. A fluid medium inlet may be formed at the bottom of the first elastomeric cavity component 200, and a fluid medium outlet may be formed at the top of the first elastomeric cavity component 200 such that the fluid medium enters the helical fluid medium from the bottom of the first elastomeric cavity component 200. The passage, which is wound around the surface of the magnetic pole 43 from the bottom to the top, flows out from the upper portion of the first elastic cavity member 200. The inner space of the first elastic cavity member 200 may be divided into a spiral-shaped fluid medium passage that is connected in series by the separator belt 230 spirally spiraling in the axial direction of the rotor in the first elastic cavity member 200.

As shown in FIG. 9, in the case where the first elastic cavity member 200 is not filled with the fluid medium, the first elastic cavity member 200 is maintained at the pre-expansion initial position, that is, the broken line position 250 shown in FIG. The pre-expansion initial position is also shown in FIG. 12, indicated by reference numeral 250. After the first elastic cavity member 200 is filled with the pressurized fluid medium or the pressurized heated fluid medium, the first elastic cavity member 200 is filled with the annular expansion and contraction space, and is in contact with the vacuum bag covering the adhesive layer, thereby Energy is transferred to the adhesive mixing space in a 360° direction.

The fluid medium charged into the first elastic cavity member 200 may be a liquid or a gas. The pole protection coating curing process apparatus according to an exemplary embodiment of the present disclosure includes a first thermal fluid medium supply system 600 for supplying a pressurized fluid medium or a pressurized heated fluid medium to the first elastic chamber part 200. The first fluid medium supply system 600 can include a fluid medium pressurizer for pressurizing a fluid medium and a heater for heating the fluid medium. Where the fluid medium is a liquid (eg, water, oil, etc.), the press may be a liquid pressure pump. Where the fluid medium is a gas, the press may be a compressor.

In an embodiment of the present disclosure, an embodiment of the present disclosure is described by taking a heating fluid medium as an air. Figure 10 shows a first fluid medium supply system. As shown in FIG. 10, the fluid medium supply system 600 includes a compressor 610, a heater 620, a first connecting line 630, a fluid delivery line 640, a fluid recovery line 650, and a bypass line 660. Compressor 610 is used to deliver pressurized air to first elastomeric cavity component 200. The pressurized air is returned to the compressor 610 through the fluid recovery line 650 after circulating in the first elastomeric cavity component 200. The pressurized air of the compressor 610 can flow to the heater 620 through the first connecting line 630, and the heater 620 supplies the pressurized air to the first elastic cavity member 200 after heating to a predetermined temperature.

The bypass line 660 is connected between the inlet and the outlet of the heater 620. When the circulating gas is not heated by the heater 620, the pressurized gas can be directly supplied from the compressor 610 to the elastic through the bypass line 660. In the cavity member 200.

A first valve 641 that controls the passage of the fluid path is provided on the fluid supply line 640. The first valve 641 can be an electrically controlled valve. A second valve 651 that controls the passage of the fluid path may be disposed on the fluid recovery line 650, and the second valve 651 may be an electrically controlled valve. A third valve 652 may be disposed on the inlet side of the compressor 610, and the external air may be supplied to the compressor 610 by opening the third valve 652. The third valve 652 can be an electrically controlled valve. The fourth valve 631 is disposed on the first connecting line 630 to control the on and off of the fluid path between the compressor 610 and the heater 620. The fifth valve 661 and the sixth valve 662 are disposed on the bypass line 660 to control the on and off of the bypass line 660.

A first pressure gauge 642 and a first temperature sensor 643 may also be disposed on the fluid supply line 640 for detecting the pressure and temperature of the supplied air, respectively. A second pressure gauge 653 may also be provided in the fluid recovery line 650 for detecting the pressure of the returning air.

When the pressurized gas is supplied into the first elastic cavity member 200 after completion of the vacuum infusion of the adhesive, the first fluid medium supply system 600 according to an embodiment of the present disclosure may be turned on to supply the pressurized air to the first elasticity. In the cavity member 200. When the air is filled and filled with the first elastic cavity member 200, it occupies an annular expansion and contraction space reserved between the first limit support member 100 and the adhesive layer. The radially inward expansion of the first resilient cavity component 200 is blocked by the first limit support component 100, and the radially outward expansion elastically compresses the vacuum bag. The first elastic cavity member 200 is in intimate contact with the vacuum bag to compress the vacuum bag.

Usually, after the adhesive is vacuum-infused into the adhesive pouring cavity, due to the action of gravity, there is usually a case where the lower adhesive is thick and the upper adhesive is thin. In addition, the adhesive near the glue injection opening is generally thick, while the adhesive is relatively thin at a location away from the glue injection opening. Since the air gap between the rotor and the stator is usually only a few millimeters, the thickness of the magnetic pole protective coating is very strict. If it is too thick, it will cause friction between the magnetic pole protective coating and the outer surface of the stator, and damage the protective cover. The layer even caused the entire motor to be scrapped. Therefore, although the vacuum infusion process is completed, the thickness of the different positions of the adhesive does not satisfy the process requirements for forming the rotor. In addition, the adhesive at this time may not sufficiently enter the gap between the magnetic pole 43, the yoke 41, and the bead 42, and is not sufficiently wetted and impregnated onto the surface of the bonded solid, and cannot be bonded and bonded. Bonding is formed between the solid surfaces.

Two conditions are required to form a bond between the adhesive and the magnetic pole, one is infiltration, and the other is adhesion, both of which are indispensable. Infiltration is a process in which the contact surface automatically increases when the adhesive contacts the surfaces of the magnetic pole, the yoke wall, and the reinforcing fiber cloth, and is an adhesive (resin and curing agent) and a magnetic pole surface, a rotor yoke wall, and a reinforcing fiber cloth. The phenomenon of intermolecular interactions that occur during contact. Therefore, in order to promote the wetting of the adhesive and the surface of the magnetic pole, the first elastic cavity member 200 is quickly filled with a pressurized gas to pressurize the adhesive to promote immersion, wetting, and seepage of the adhesive.

As an example, a portion of the gas may be pre-charged in the first elastomeric cavity component 200 such that the first elastomeric cavity component 200 can be fully filled after the compressor 610 is turned on.

Preferably, the fluid medium inlet is disposed at a lower portion of the first elastic cavity member 200, and the pressurized gas is charged from the lower layer, and the lower adhesive is first squeezed to drive the excess adhesive upward. The pressurized gas rises layer by layer from the lower portion of the passage around the inner side wall of the magnetic pole 23, thereby driving the adhesive layer by layer upward to achieve uniform application of the adhesive on the surface of the magnetic pole 23.

When the pressurized cavity gas is filled into the elastic cavity member 200 by the compressor 610, the first valve 641, the third valve 652, and the fourth valve 631 may be opened to close the other valves. External air is introduced into the compressor 610 through the third valve 652, and the air pressurized by the compressor 610 directly enters the first elastic cavity member 200 through the bypass pipe 660. When the gas passes through the heater 620, the fluid resistance is large and the time is long, so that the response time of the fluid pressure changes slowly. Therefore, when it is required to instantaneously fill the elastic cavity member 200 with air, the gas can be directly charged into the first elastic cavity member 200 from the compressor 610 through the bypass line 660, thereby avoiding the heater having a large flow resistance. 620.

The first elastic cavity member 200 may press the adhesive at a constant pressure or may press the adhesive with a pulsating pressure. In order to promote the flow and diffusion of the adhesive, the pressure of the pressurized gas to be charged may be periodically changed. Therefore, the first fluid medium supply system 600 operates in a pressure swing manner such that the first elastic cavity member 200 presses the adhesive in a fluctuating manner. Figure 12 shows a schematic view of the first elastomeric cavity component 200 applying pressure to the adhesive layer.

During the pressure swing operation, the pressure of the charged gas may be increased by controlling the compressor 610, and the internal pressure of the elastic chamber member 200 may be reduced by operating the third valve 652 to release a certain amount of gas outward. When the pressure changes, the fourth valve 631 can be closed, and the fifth valve 661 and the sixth valve 662 on the bypass line 660 are opened, so that the pressurized gas does not pass through the heater 620, but directly enters through the bypass line 660. In the first elastic cavity member 200, an instantaneous change in pressure is achieved to improve the extrusion and repellent effect on the adhesive.

In the first embodiment according to the present disclosure, the cavity in the first elastic cavity member 200 is divided into a multi-layered passage by the separation tape 230. The multi-layer channels are connected in series to form a single fluid medium channel. The divider strip 230 can be a flexible ribbed strip that is joined to the first side wall 210 and the second side wall 220, respectively. When the pressurized gas is rapidly charged into the first elastic cavity member 200, the lower passage instantaneously expands to form an instantaneous impact force on the partition belt 230, and the partition belt 230 is bent upward and deformed under the impact force to enter the adjacent In the upper channel. This impact force experienced by the divider strip 230 will tear the divider strip 230 out of the first elastomeric cavity component 200. In particular, during the pressure swing operation, the separation strip 230 is repeatedly bent and deformed in different directions, which may exacerbate damage of the separation strip 230 to be detached from the side walls of the first elastic cavity member 200. Therefore, in order to reduce the tear caused by the instantaneous impact on the separation strip 230, some voids are formed in the separation strip 230, so that a part of the air enters the channel with relatively low pressure from the channel with high pressure, and the moment on both sides of the separation strip 230 is reduced. Pressure difference.

FIG. 7 shows an example in which the aperture is opened at a position where the separation strip 230 is connected to the first side wall 210. FIG. 8 shows an example in which the pores start at a position where the separator tape 230 is joined to the second side wall 220. However, the aperture may be opened at any position of the separation strip 230, for example, in the middle of the separation strip 230. The shape of the apertures 240 is preferably circular to avoid local stresses that are excessively cracked.

According to an embodiment of the present disclosure, the process apparatus for magnetic pole protective coating solidification molding may further include a second energy transfer system for heating the outer circumferential surface of the yoke 41. As shown in FIG. 11, the second energy transfer system can include a second resilient cavity component 300 and a second limit support component 400. The second limiting support member 400 has a cylindrical shape and is disposed on the outer circumference of the rotor 40 to form an annular gap with the outer circumferential surface of the rotor 40, that is, the second accommodation space, and the second elastic cavity member 300 is disposed at the Two accommodation spaces. The second energy transfer system may also include a second fluid medium supply system (not shown) to charge the second elastomeric cavity component 300 with heated pressurized gas. Since only the outer surface of the yoke 41 needs to be heated, it is possible to charge only the second elastic cavity member 300 with the heating gas. However, preferably, in order to bring the second elastic cavity member 300 into close contact with the outer surface of the yoke 41 to thermally heat the yoke 41 and prevent the second elastic cavity member 300 from being burnt, the second energy transfer system may also A second compressor (not shown) is included to charge the second elastomeric cavity member 300 with heated pressurized gas. Limiting platens 410 and 420 may also be provided at both ends of the annular gap to limit axial outward expansion and heat transfer of the second resilient cavity component 200. Since the cylindrical wall of the yoke 41 does not need to be subjected to wave pressure. Therefore, in addition to the fluctuating pressurization, the second energy transfer system can be similar to the configuration of the first energy transfer system, and the second energy transfer system will not be described in detail herein for the sake of brevity of the description.

As shown in FIG. 12, the first elastic cavity member 200 and the second elastic cavity member 300 may each be made of flexible rubber or flexible plastic, and may be embedded with the temperature sensor 510 and the pressure sensor 520, and through the data bus. The controller 500 is coupled to communicate pressure signals and temperature signals to the controller 500 for overall monitoring and control of pressure and temperature. The pressure signal deviation corresponds to the thickness deviation of the magnetic pole protection coating. The low pressure corresponds to the thickness of the magnetic pole protection coating. When the pressure is large, the thickness of the magnetic pole protection coating is small. The relationship between pressure signal deviation and thickness deviation can be established as an indicator for evaluating the working effect of the energy transfer system. The axial height pressure deviation signal can be used as the basis for determining the failure of the vacuum system. The thickness gauge is used to check and correct the variable pressure operation period and strength.

Figure 14 shows the pressure profile of the elastomeric cavity component 200 and the temperature profile of the adhesive cure process.

As shown in Fig. 14, the horizontal axis represents the time axis, the left vertical axis represents the magnitude of the pressure, and the right vertical axis represents the temperature. P1 represents the absolute pressure in the vacuum bag, and P0 represents the ambient atmospheric pressure of the manufacturing plant. T1 represents the ambient temperature of the manufacturing plant. T0, t1, t2, and t3 represent various time points of the process. According to the time points t0, t1, t2, and t3, the pressure change curve of the elastic cavity member 200 and the temperature change curve of the adhesive curing process can be divided into three stages, which respectively correspond to the pressurized seepage process and the heat and pressure curing process. And cooling and stress relaxation processes.

The first stage (from t0 to t1) is a pressurized seepage process. Pressure energy is applied to the adhesive layer by the first elastic cavity member 200 to promote diffusion, wetting, and seepage of the adhesive in the adhesive mixing space. In this process, in order to prevent the adhesive from solidifying before the thickness is evenly applied, the adhesive layer is not heated first. The adhesive pulsation can be pressurized by varying the pressure fluctuations in the first elastic cavity member 200. By a plurality of cycles of cyclic pulsation pressurization, the adhesive can be uniformly applied and enter the gaps and gaps between the yoke 41, the bead 42, and the magnetic poles 43, thereby better impregnating and wetting the solid surface. Throughout the process, since the adhesive is not heated, the adhesive is maintained at a stable temperature substantially equal to the temperature at the time of injection.

The second stage (from t1 to t2) is a heat and pressure curing process, and the alternating pressurization of the adhesive is terminated at the time point t1, and the adhesive is pressed at a constant pressure, and the adhesive is started from the time point t1. The agent is heated. The inside of the rotor is heated and pressurized from the magnetic pole side by charging the first elastic cavity member 200 with a heated and pressurized gas. The rotor yoke is heated by the second energy transfer system outside the rotor, and the adhesive is heated and heated from the yoke side. By controlling the temperature on both sides of the heated area, the adhesive is uniformly heated on both sides, so that the temperature on both sides of the adhesive is symmetrically increased, and the thermal stress caused by the temperature difference between the magnetic pole perimeter and the protective coating is reduced. In the following description, the second energy transfer system includes the second elastic cavity member 300 as shown in FIG.

Since the hot air can be charged into the first elastic cavity member 200 and the second elastic cavity member 300 in a short time, the first elastic cavity member 200 and the second elastic cavity member 300 can be in a few seconds. The inside is filled with heated and pressurized gas, so that the response speed is fast and the temperature is controllable. Since the first elastic cavity member 200 is in close contact with the vacuum bag, the adhesive mixing space can be directly heated quickly by heat conduction. At the same time, the second elastic cavity member 300 closely contacts the yoke 41 to heat the yoke 41 in a thermally conductive manner. Therefore, the controller 500 can raise the temperature of the adhesive from the perfusion temperature to a temperature near the optimum bonding curing temperature by controlling the temperature on both sides of the adhesive mixing space. The temperature rise is raised from the resin injection temperature to the desired curing temperature, and the temperature is raised to the desired temperature and then kept at a constant temperature for a period of time to promote the reaction, coagulation, and solidification of the curing agent and the resin. By controlling the first energy transfer system and the second energy transfer system, the temperatures on both sides of the adhesive mixing space are kept consistent and maintained at an optimum bond curing temperature for a set number of hours. Temperature is the main factor in the curing of the adhesive, not only determines the degree of curing, but also determines how fast the curing process takes place. Too long curing time or incomplete curing will lower the bonding performance. If the temperature is too high, the reaction will be too fast, and the rapid increase of viscosity will affect the diffusion of the adhesive to the surface of the bonded solid, and the bonding performance will also be degraded. Therefore, in the bonding process, it is necessary to effectively control the bonding curing temperature, and it is also necessary to maintain the curing bonding temperature for a necessary length of time to obtain the strength requirement for curing during the heating bonding. During the heat curing process, the temperature on the side of the vacuum bag can be kept constant with the temperature of the inner surface of the yoke and held for 7-8 hours.

In the second stage, the second elastic cavity member 300 is in contact with the outside of the yoke 41 to achieve heat conduction, and therefore, the pressure in the second elastic cavity member 300 satisfies the second elastic cavity member 300 and the yoke. The outer wall of 41 can be in close contact. Generally, the yoke 41 is made of a metal material, and the heat transfer system is high, enabling rapid heat transfer. However, since the first elastic cavity member 200 directly contacts the adhesive mixing space, and the second elastic cavity member 300 needs to heat the adhesive mixing space through the yoke 41, the second elastic cavity can be made The temperature of the gas in component 300 is slightly greater than the temperature in first elastomeric cavity component 200 to maintain uniform temperature across the adhesive mixing space. The heating temperature on both sides of the adhesive mixing space can be calculated.

The third stage (from t2 to t3) is the cooling and stress relaxation process. After the curing of the adhesive reaches the strength requirement, the process enters a cooling and stress relaxation process. In this process, in order to avoid the stress caused by the rapid cooling of the adhesive, the adhesive mixing space is cooled at a certain rate, and the cooling rate and the cooling time can be calculated. By controlling the first energy transfer system and the second energy transfer system, the temperature on both sides of the adhesive is lowered at a set rate. At the time point t3, the temperature of the adhesive mixing space reaches room temperature, the pressure in the first elastic cavity member 200 is also gradually lowered, and the curing of the adhesive is completed, thereby forming a protective coating. At this point, the elastomeric cavity component 200 can be depressurized to remove the corresponding process equipment. Avoid sudden changes in stress caused by sudden cooling and affect the life of the protective coating. The cooling and stress relaxation process can last for 5-6 hours.

As shown in Fig. 14, during the pressurized percolation by the fluctuating pressurization of the adhesive, in the initial stage, preferably, the pressure applied to the adhesive is smaller and the duration is shorter. This is because, in the case where the adhesive has not been completely spread out, there may be a possibility of partial accumulation of the adhesive, for example, the adhesive sag due to gravity, and the thickness of the lower portion is relatively larger than the thickness of the upper portion. If the pressure is too large and too fast, it is easy to cause the vacuum bag to rupture. After being pressurized by a plurality of fluctuations, the adhesive partially deposited in the lower portion is gradually driven upward and spread. As the thickness of the adhesive coating is gradually uniform, the magnitude and duration of the pressurization can be increased. By alternating the adhesive, the thickness of the adhesive is completely uniform over the entire surface of the magnetic pole, so that the adhesive is repeatedly wetted and mixed with the glass reinforced fiber cloth, and enters each gap under the action of radial pressure, and Impregnate and wet the solid surface.

During the alternating pressurization of the first stage, a plurality of rounds of pressurization operations may be performed, for example, an N-round pressurization operation, where N is a natural number and is greater than or equal to 3. The maximum pressure of each pressurization operation can be gradually increased, and the duration can be gradually lengthened.

Taking a three-wheel press operation as an example, in the first round pressurization operation, the pressure can be raised to Pˊ and then lowered to a predetermined pressure, which can be greater than or equal to P2, and P2 is greater than the ambient atmospheric pressure P0. In the second round of pressurization operation, the pressure can be raised to Pˊˊ and then lowered. In the third round of pressurization operation, the pressure can be raised to Pˊˊˊ, then lowered to P2, and maintained at P2 for the second stage of the heat curing process. In the above pressurizing operation, the pressure per round of operation is gradually increased, that is, the pressure P ˊˊˊ > P ˊˊ > P ˊ, and the duration of each round is gradually lengthened.

As can be seen from Fig. 14, the peak value of each round of pressurization is gradually increased and the duration is gradually increased, so that the average pressure value and duration of each round of pressurization are stepwisely increased. By the stepwise increase of the average pressure, the adhesive is subjected to wave pressure, and the adhesive layer is flexibly beaten like an air hammer, and the beating force is gradually increased, so that the adhesive sufficiently enters the magnetic pole and the yoke. The thickness of the adhesive layer is uniform in each of the gaps and in the radial direction of the rotor.

Alternatively, each round of pressurization operation may include a plurality of repetitive operations, i.e., each pressure increase-reduced pressurization operation may also be performed multiple times. For example, in the first round of pressurization operation, the operation of raising the pressure to Pˊ may be repeatedly performed a plurality of times, and in the second round of pressurizing operation, the operation of raising the pressure to P〞 may be repeatedly performed a plurality of times, In the third round of pressurization operation, the operation of raising the pressure to Pˊˊˊ may be repeatedly performed a plurality of times. During the entire pressurized seepage process, the pressure in the first elastic cavity member 200 may always be greater than the ambient atmospheric pressure P0, for example, Always greater than the pressure P2.

In the heat curing stage, according to the basic surface thermodynamic relationship of the polymer surface tension balance decreases as the reaction temperature increases, controlling the temperature value of the adhesive mixing space reduces the surface tension of the adhesive to make the adherend (magnetic pole The rotor yoke wall is improved by the adhesion of the adhesive, and is cured for a certain period of time in the vicinity of the optimum temperature for the adhesion, adsorption, and bonding of the adhesive. By making the 360-direction and height-direction temperature rise control of the "adhesive mixing space" uniform and uniform in temperature distribution, the adhesive is cured and cured at the optimum curing temperature, and both sides of the adhesive mixing space are controlled. The temperature is to avoid the thermal internal stress caused by the temperature difference.

During the cooling and stress relaxation phases, the temperature on both sides of the adhesive layer is symmetrically reduced at a set rate to avoid shrinkage stress caused by excessively rapid cooling.

According to the embodiment of the present disclosure, during the heating process, the heating fluid continuously flows throughout the elastic cavity, ensuring that the temperature distribution in the circumferential direction and the different heights of the temperature field is uniform and controllable, so that the adhesive is heated in the range of 360° in the circumference. Uniformity, the magnetic pole and the yoke are uniformly heated in the height direction, so that the stress is eliminated during the forming process of the magnetic pole protective layer itself, the molding quality is ensured, and the peeling and fracture caused by the stress during the later use are reduced. According to the embodiment of the present disclosure, the air volume occupied by the entire elastic cavity is very small, which means that the air flow circulation process is small in cost, the heat absorption is small, and the temperature rise transition process is short, and the temperature rising rate control of the adhesive filling process is easily realized. .

Further, according to the embodiment of the present disclosure, in the vacuum holding stage, since the elastic cavity member 200 is pressed against the outer surface of the vacuum bag, even if the vacuum bag is broken, it can be in close contact with the outer surface of the vacuum bag and tightly Squeeze the vacuum bag to prevent vacuum failure in the vacuum bag.

15 is a schematic diagram of a first energy transfer system in accordance with a second embodiment of the present disclosure. In the second embodiment according to the present disclosure, the respective layer passages in the elastic cavity member 200 are independent of each other and connected in parallel between the inlet and the outlet of the first fluid medium supply system 600, and thus, the respective passages can be individually controlled. The first energy transfer system shown in FIG. 15 includes a splitter manifold 645 coupled to the fluid delivery conduit 640 and a return manifold 655 coupled to the fluid recovery conduit 650. The diverting mother pipe 645 is in communication with a diverting branch pipe for conveying air to each of the annular passages of the elastic cavity member 200, and each of the diverting branch pipes is provided with a diverting branch pipe valve 7, 9, 11 for controlling the opening and closing of each diverting branch pipe. 13, 15, 17, 19 The returning mother pipe 655 is in communication with a return branch pipe for recovering air in each of the annular passages, and each of the return branch pipes is provided with a return pipe valve 6, 8, 10, 12, 14, 16 for controlling the opening and closing of each of the return pipe branches. 18.

In order to form the respective independent passages, the inner space of the first elastic cavity member 200 is divided into a plurality of annular passages in the axial direction of the rotor by the annular partitioning belt 230. In order to separate the layers of the channels from each other and to reduce the interference and influence between adjacent channels, the separation strips 230 may be annular ribbed separators having a certain rigidity. Further, a longitudinal partitioning piece (not shown) is provided in each of the annular passages, and a branching branch pipe and a returning branch pipe are provided on both sides of the longitudinal partitioning piece, so that the air flowing into the annular passage is circulated throughout the circumferential direction. The airflow flowing into the annular passage through the branch branch pipe is circulated for one week at a circumference of 360° and then flows out through the return branch pipe.

In the example shown in FIG. 15, the space in the first elastic cavity member 200 is divided into seven layers of passages, from bottom to top, respectively, a first annular passage, a second annular passage, a third annular passage, and a fourth annular shape. a channel, a fifth annular channel, a sixth annular channel, and a seventh annular channel. The split manifolds of the respective channels can be controlled by valves 7, 9, 11, 13, 15, 17, 19, respectively, and the return branches of the respective channels are controlled by valves 6, 8, 10, 12, 14, 16, 18. However, the number of layers of the above channels is merely exemplary, and the number of layers of the channels can be set according to the size of the rotor and the need for pressure control.

Similar to the process described above with reference to Figure 14, after the adhesive is vacuum infused, pressure is applied to the adhesive, and the thickness of the adhesive layer is uniformed by extrusion and driving, while the adhesive is impregnated and infiltrated. Seepage into each gap. The pressure of each layer passage can be layered and controlled by opening and closing of each valve to pulsate the pressure of the first elastic cavity member 200. In the first stage of the pressure swing operation, the bypass line 660 is opened to allow pressurized gas to pass directly through the splitter manifold 645 and then through the splitter branch into each of the channels. In order to control the pressure of each flow path in a layered manner and the pressure of the lower passage is relatively larger than the pressure of the upper passage, each passage may be filled with pressurized gas from the bottom to the top in the order of step pressurization. The opening of the branch pipe valves 19, 17, 15, 13, 11, 9, 7 can be delayedly opened in the order from bottom to top, so that the lower passage is first filled with pressurized gas, and the lower passage is The gas pressure is greater than the gas pressure of the upper passage, and the adhesive is pushed up from the bottom. The pressure of each layer of the annular passage can be controlled by controlling the opening or opening time of each of the split manifold valves. Through the step pressure operation, the annular passages of each layer are pushed step by step from the bottom to the top to drive the adhesive. In addition to the step pressure, the pressure of each layer channel can be alternately pulsating.

FIG. 16 shows an exemplary diagram of step-pressurizing the layers of the first elastic cavity component 200. In Fig. 16, the horizontal axis represents the control sequence of each branch pipe valve, and also corresponds to the control sequence of each ring channel, the left vertical axis represents the pressure magnitude, and the right vertical axis represents the timing of each wheel press operation, indicating multiple rounds. Pressurization process. T1, t2, t3, t4, t5, and t6 on the timing axis indicate the time at which each round of pressurization is completed.

Next, a pressurization process according to a second embodiment of the present disclosure will be described in detail with reference to FIG.

In the initial state, all of the split manifold valves 19, 17, 15, 13, 11, 9, 7 and all of the return manifold valves 6, 8, 10, 12, 14, 16, 18 are closed. Here, the pressures in the first to seventh annular passages are represented by P ₁ , P ₂ , P ₃ , P ₄ , P ₅ , P ₆ , and P ₇ , respectively. When it is required to charge the respective channels with pressurized gas, the compressor 610 is opened, and the split branch pipe valve 19 of the lowermost passage is opened first, and the opening degree of the split branch pipe 19 is controlled to charge the pressurized gas into the first annular passage. The split manifold valve 19 is closed after the first inflation time ΔT1. Then, the split branch pipe valve 17 of the second annular passage is opened, so that the opening degree of the split branch pipe valve 17 is smaller than the opening degree of the split branch pipe valve 19, and the split branch pipe valve 17 is closed after the first inflation time ΔT1. Since the opening degree of the split branch pipe valve 17 is smaller than the opening degree of the split branch pipe valve 19, the pressure P _{2 of the} second annular passage is smaller than the pressure P _{1 of the} first annular passage in the case where the inflation time is the same.

Then, the split manifold valves 15, 13, 11, 9, 7 are sequentially opened, so that the opening degrees of the valves are sequentially decreased, and are closed after the same time ΔT1. During the pressurization process, all of the return manifold valves 6, 8, 10, 12, 14, 16, 18 are in a closed state. Since the opening degree of each branch pipe valve is different, after the first wheel pressure is performed in the case where the opening duration is ΔT1, P ₁ >P ₂ >P ₃ >P ₄ >P ₅ >P ₆ >P ₇ . The split manifold valves 19, 17, 15, 13, 11, 9, 7 can be opened by successive delays so that the lower annular passage is filled with pressurized gas first. The magnitudes of the respective pressures P ₁ , P ₂ , P ₃ , P ₄ , P ₅ , P ₆ , P ₇ are controlled by controlling the opening degrees of the respective branch branch valves 19, ₁₇ , ₁₅ , ₁₃ , ₁₁ , ₉ , and ₇ . In addition, the respective pressures P ₁ , P ₂ , P ₃ , P ₄ can also be controlled by controlling the opening duration ΔT1 such that the opening duration of each of the split manifold valves 19, ₁₇ , ₁₅ , ₁₃ , ₁₁ , ₉ , _{7 is different.} , the size of P ₅ , P ₆ , and P ₇ .

When the adhesive is poured by the vacuum infusion process, the injection port is usually disposed at the lower portion of the vacuum bag, and the suction port connected to the vacuum pump is disposed at the upper portion of the vacuum bag, and the pressure inside the vacuum bag is close to the environment near the injection port. At atmospheric pressure, the pressure inside the vacuum bag is close to zero near the suction port. Therefore, along the axial direction of the rotor, the pressure difference between the inside and outside of the vacuum bag is not uniform, and the pressure difference at the upper portion is larger than the pressure difference at the lower portion. This hinders the penetration and spreading of the adhesive from the lower portion to the upper portion. Therefore, the thickness of the infused adhesive is not uniform over the entire surface of the magnetic pole of the rotor, and the thickness of the lower portion is greater than the thickness of the upper portion. Since the air gap between the rotor and the stator is usually only a few millimeters to a dozen millimeters, when the pole protection coating is locally thick, it is highly likely that the collision between the stator and the rotor will occur during the operation of the wind turbine. Wear and wear, causing damage and falling off of the magnetic pole protective coating. Therefore, the thickness of the pole guard coating should be uniform and uniform, which is very important for the reliable operation of the wind turbine.

According to an embodiment of the present disclosure, the lower adhesive can be driven to the upper portion by first filling the lower annular passage with a higher pressure gas and pressing the adhesive layer with a larger pressure.

The operation of charging the first elastic cavity member 200 with pressurized gas can be performed a plurality of times. As shown in FIG. 16, the first round of inflation process ends at time t1, after maintaining the predetermined inflation time ΔT2, the compressor 610 is outputted with a higher pressure gas, and the split manifold valves 19, 17, 15, 13 are sequentially opened again. 11, 9, 7, repeat the previous inflation process, ending the second round of inflation at time t2. And so on, the third, fourth, fifth, and sixth rounds of inflation and pressurization are completed at times t3, t4, t5, and t6, respectively.

Each of the pressures P ₁ , P ₂ , P ₃ , P ₄ , P ₅ , P ₆ , P ₇ of the gases in the respective annular passages is gradually increased by charging the gas at a higher pressure a plurality of times. On the one hand, it can be avoided that the pressure in the annular passage is filled too quickly, causing the vacuum bag to rupture. On the other hand, the adhesive is pressed and driven at a gradually increasing pressure, so that the adhesive penetrates better into the gap between the magnetic pole, the bead and the yoke, and is laid on the magnetic pole with a uniform thickness. On the outer surface of the 43, the annular air gap between the rotor and the stator is ensured to be uniform in the circumferential direction and the axial direction.

In order to effect the fluctuating pressurization of the adhesive, after the step pressurization of the first elastic cavity member 200 is completed, the respective annular passages may be depressurized step by step, so that the pressure of each annular passage is correspondingly lowered. Similar to the way of step pressure, the step relief of each annular channel can be achieved by controlling the opening degree or opening duration of the return branch of each channel. FIG. 17 shows an exemplary diagram of step relief of the various layers of channels of the first elastomeric cavity component 200.

In Fig. 17, the horizontal axis represents the control sequence of the respective return branch valves, and also corresponds to the control sequence of the respective annular passages, the left vertical axis represents the magnitude of the pressure, and the right vertical axis represents the timing of each wheel pressure relief operation. The difference from Fig. 16 is that the arrow direction of the left pressure axis faces downward, indicating that the pressure gradually decreases from the top to the bottom, and the direction of the right timing axis is also downward. Contrary to the sequence of pressurizing the respective annular passages, when the respective passages are depressurized, all the split manifold valves are closed, and the third valve 652 is opened to release the gas to the outside, and the return branch valves 6 of the respective passages are sequentially delayed. 8, 10, 12, 14, 16, 18, pressure relief for each annular channel. The return branch valve of the lower annular passage can be opened first, so that the pressure of the lower annular passage is first lowered, and the opening of the return branch valve of the lower annular passage is smaller than the opening of the return branch valve of the upper annular passage, and the lower annular passage is still maintained. The pressure is greater than the pressure of the upper annular passage. As shown in Fig. 17, the return branch valve 18 of the lower first annular passage is opened first, the opening degree of the return branch valve 18 is controlled, and after the predetermined deflation time ΔT3 is continued, the return branch valve 18 is closed. The return manifold valve 16 of the second annular passage is then opened to control the opening of the return manifold valve 16 to be less than the opening of the return manifold valve 18, and to close the return manifold valve 16 after the predetermined relief time ΔT3 continues. By analogy, the opening and closing operations of the respective return branch valves 14, 12, 10, 8, 6 are sequentially performed, so that the pressure of each annular passage is correspondingly lowered. Likewise, the pressure of each annular passage can be controlled by controlling the magnitude of the opening duration ΔT3 of each of the return branch valves 6, 8, 10, 12, 14, 16, 18.

Although the pressure relief operation is performed on the respective annular passages in the order from bottom to top in FIG. 17, the pressure relief of each of the annular passages may be performed in the order from top to bottom during the pressure relief operation. operating.

Similar to the process of step pressurization, the pressure in each annular passage is gradually reduced by performing the pressure relief process a plurality of times. As shown in the example of FIG. 17, the pressure relief of the first wheel, the second wheel, the third wheel, the fourth wheel, the fifth wheel, and the sixth wheel is sequentially completed at time points t7, t8, t9, t10, t11, and t12. operating.

Then, the step pressurizing operation in FIG. 16 and the step pressure releasing operation in FIG. 17 can be repeated again, so that the gas pressure in the first elastic cavity member 200 is periodically increased and decreased, thereby adhering to the pressure of the cyclic fluctuation. The bonding agent is extruded and driven so that the adhesive fills the gap around the magnetic pole 43, fully immersed, wets the surface of the bonded solid, and the coating thickness is 360° on the radially inner surface of the magnetic pole 43 and the axial direction Uniform. The first embodiment described with reference to FIG. 13 similar to that described in the pressurization process and the flow of heat and pressure during curing, the pressure in the cavity 200 of the first elastomeric kept greater than the ambient atmospheric pressure may be P _0.

After a plurality of rounds of pressurization and pressure relief operations, the wetting and laying thickness of the adhesive meets the process requirements, and the first stage of the wave pressurization process is completed. At this time, the second stage heat curing process may be performed, the heating gas is charged into the first elastic cavity member 200, and the adhesive is heated to cure the adhesive.

When the heat curing operation is performed, the third valve 652 is closed, and the respective split manifold valve and the return branch valve are simultaneously opened, so that the gas pressures of the respective annular passages are the same, the gas is circulated through the heater 620, and the temperature of the control gas is set according to The rate is set to the optimum curing temperature. In the same manner as the process described in accordance with the first embodiment, by controlling the first energy transfer system and the second energy transfer system, the temperature on both sides of the mixing space is controlled to be uniform, and the magnetic pole protection of the rotor is performed in the 360 degree and axial directions of the circumference. The layers are uniformly heated.

According to the technical solution of the present disclosure, by controlling the first energy transfer system and the second energy transfer system on both sides of the yoke of the rotor, the temperatures on both sides of the adhesive mixing space can be made uniform, and the temperature rise rate is uniform. The main factor of curing of the adhesive at temperature not only determines the degree of completion of the curing, but also determines the speed of the curing process. If the curing time is too long or the curing time is too short, the bonding performance will be degraded. If the temperature is too high, the reaction will be too fast, and the rapid increase of the viscosity will affect the diffusion of the adhesive to the surface of the adherend, and the adhesive property will also be lowered. Therefore, the adhesive must be strictly controlled during the curing process of the adhesive. Agent curing temperature. The adhesive currently used is a reactive adhesive. After the two components of the resin and the curing agent are mixed, a crosslinking reaction occurs, and it is necessary to maintain the necessary number of hours at the curing bonding temperature, and the curing is achieved during the heating bonding. Strength requirements.

After the adhesive is maintained at the preferred bond cure temperature for a set period of time, the adhesive is substantially fully cured, thus performing the third stage, the temperature drop and stress relaxation stages. During the cooling and stress relaxation phases, the adhesive mixing space is cooled at a set rate, and accordingly, the pressure in the first elastic cavity member 200 is also gradually reduced. The temperature of the charged gas can be lowered at a set rate by controlling the power of the heater 620.

The process equipment and the process method for the magnetic pole protective coating solidification molding according to the embodiments of the present disclosure can improve the process reliability of the permanent magnet magnetic pole production manufacturing to improve the magnetic pole protection molding quality. According to the embodiment of the present disclosure, by controlling the energy transfer system on both sides of the magnetic pole, the hot air flow itself continuously flows through the entire elastic cavity, ensuring that the temperature distribution in the circumferential direction and the height of the temperature field is uniform and controllable, and the temperature rise can be realized. Uniform control, uniform temperature distribution, and extremely fast controllable temperature rise rate, which solves the problem of heat uniformity in the 360 degree range and the uniformity of heat in the magnetic pole and yoke height during the protective coating process of the permanent magnet motor magnetic pole. .

By filling the first elastic cavity member 200 with pressurized gas, the surface of the flexible material is adapted to the relatively rigid outer surface formed by vacuuming the surface of the vacuum bag, and it is objectively easy to achieve seamless bonding with the surface of the vacuum bag. Close contact. Intimate contact is achieved to transfer heat energy in a thermally conductive manner, thereby improving heat transfer efficiency. Through the wave pressure, the wetting and seepage of the adhesive is promoted, which provides sufficient protection for the formation of the adhesive force.

The air volume occupied by the entire elastic chamber is very small, which means that the air flow circulation process is small in cost, the heat absorption is small, the temperature rise transition process is short, and the temperature rise speed is controllable, and the rapid requirement for temperature rise in the resin filling process is easily realized.

Since the first elastic cavity member 200 can only transfer heat to the adhesive mixing space through the first limiting member 100, heat loss is small, and other components are prevented from absorbing heat, thereby reducing heat loss and heat consumption in the entire process. .

In addition, since the fan for forced convection heat transfer is not employed throughout the heating process, noise is reduced as compared with the prior art air convection heat exchange.

In summary, according to the embodiments of the present disclosure, by uniformizing the temperature rise rate during the molding process of the magnetic pole protective coating and uniformizing the temperature distribution, the stress of the magnetic pole protective coating itself is eliminated, the molding quality is ensured, and the stress during the later use process is reduced. The peeling and breaking, the occurrence of the magnetic pole protective coating fracture phenomenon, improve the operating life of the unit.

Although the above example uses the first energy transfer system and the second energy transfer system to heat from both sides of the adhesive mixing space, the bonding is selected due to limitations of the process conditions or structural limitations of the components themselves. When one side of the mixing space is heated, the corresponding technical effect can also be achieved by using one of the first energy transfer and the second energy transfer system of the present disclosure.

According to the embodiment of the present disclosure, it is not limited to the solidification molding of the magnetic pole protective coating applied to the rotor of the wind power generator, and can also be applied to other occasions where the bonding layer needs to be laid and the adhesive is cured and molded, and similar technology can be realized. effect. When applicable to other shapes of the member to be heated, the limit support member is not necessary, and the elastic cavity member can be fixed to the surface of the member to be heated by various means, especially in the shape of the protective coating. The means for securing the elastomeric cavity component to the surface of the component to be heated can be varied, if desired.

While the disclosure has been described with reference to the preferred embodiments, the embodiments of the invention It should be noted that various modifications may be made to the present disclosure without departing from the principles of the present disclosure, and such modifications are intended to fall within the scope of the appended claims.

Claims (20)

1. A process apparatus for solidifying a magnetic pole protective coating of a rotor of a motor, the motor rotor (40) comprising a yoke (41) and a magnetic pole (43), the magnetic pole (43) being fixedly mounted on the magnetic On the first surface of the first side of the yoke (41) on the radial side, the surface of the magnetic pole (43) is covered with a vacuum bag (50) for forming an adhesive and a magnetic pole (43), a yoke (41) A mixed and solidified adhesive mixing space, characterized in that the process equipment comprises a first energy transfer system, the first energy transfer system comprising:

   a first limiting support member (100) facing the first surface of the yoke (41), spaced apart from the magnetic pole (43) by a predetermined distance to form a first receiving space;

   The first elastic cavity member (200) is a flexible closed cavity supported by the first limiting support member (100) and located in the first receiving space;

   a first fluid medium supply system (600) in communication with the first elastomeric cavity component (200) for supplying a pressurized fluid medium or a pressurized heating fluid medium to the first elastomeric cavity component (200), The first elastic cavity member (200) is pressed against the adhesive injected into the vacuum bag (50);

   Wherein the first elastic cavity member (200) is annular and includes a plurality of annular passages (240) stacked in an axial direction of the rotor (40), the multilayer annular passage ( 240) Independent of each other, each annular passage (240) has a fluid medium inlet and a fluid medium outlet, respectively, the fluid medium inlet and the fluid medium outlet being in communication with the first fluid medium supply system (600), respectively.
2. The process apparatus of claim 1 wherein said fluid medium inlet of said annular passage (240) is disposed adjacent said fluid medium outlet and is separated by a longitudinal divider or quasi-rigid separation strip (230) open.
3. The process apparatus of claim 1 wherein said first fluid medium supply system (600) comprises a fluid medium pressurizer, a splitter manifold connected to an outlet side of said fluid medium pressurator (645) And a returning mother pipe (655) connected to the inlet side of the fluid medium presser, the splitter pipe (645) passing through the branch pipe and the respective layers in communication with the respective annular channels (240) Channels (240) are connected, and each of the branch branches is provided with a branch pipe valve, and the return pipe (655) passes through a return pipe and a plurality of annular channels (240) respectively communicating with the annular channels (240) of each layer. Connected, each of the return branch pipes is provided with a return pipe valve;

   The first fluid medium supply system (600) further includes a heater (620) and a bypass line (660), the heater (620) and the bypass line (660) being connected in parallel to the fluid A medium presser is interposed between the splitter tube (645).
4. A process apparatus according to claim 3, wherein a third valve (652) is provided on the inlet side of said fluid medium presser in communication with an external fluid medium source for introducing said external fluid medium into said The first fluid medium supply system (600) releases or releases the fluid medium from the first fluid medium supply system (600);

   The process apparatus further includes a controller (500) for controlling the fluid medium pressurizer, the opening of the split manifold valve, the opening of the return branch valve, the third valve (652) a switch, wherein each of the annular passages (240) is filled with a pressure alternating fluid medium;

   The controller (500) sequentially opens the respective branch pipe valves and controls the opening degree or opening duration of each of the branch pipe valves, so that the pressure of the fluid medium in each annular channel (240) is sequentially increased, and then sequentially decreased. It is small and repeated a plurality of times to apply pulsating pressure to the adhesive mixing space.
5. The process apparatus according to claim 4, wherein said rotor is placed axially vertically, said respective annular passages (240) are sequentially stacked from bottom to top, and said controller (500) controls The first fluid medium supply system (600) sequentially opens the branch pipe valves of the respective annular passages (240) from bottom to top, and controls the opening degree and opening duration of the respective branch pipe valves so that the lower annular passage (240) A step-up press operation is performed by charging the pressurized fluid medium first than the upper annular passage (240) and sequentially reducing the pressure of each of the annular passages (240) from bottom to top.
6. The process apparatus according to claim 5, wherein said controller (500) controls said first fluid medium supply system (600) to cause said step pressurization operation to perform a plurality of rounds such that each annular passage The pressure of each of (240) gradually increases.
7. The process apparatus according to claim 6, wherein said controller (500) controls said first fluid medium supply system (600) after being subjected to a plurality of steps of a step pressurization operation, from bottom to top or by Each of the return branch valves is sequentially opened up and down, and the respective annular passages (240) are sequentially depressurized, so that the pressure of each of the annular passages (240) is reduced to perform a one-step step relief operation.
8. The process apparatus according to claim 7, wherein said controller (500) is further configured to perform said step pressure relief operation for a plurality of rounds by controlling said first fluid medium supply system (600) such that said The pressure of each of the respective annular passages (240) is gradually reduced.
9. The process plant of claim 8 wherein said process equipment further comprises a second energy transfer system, said second energy transfer system comprising:

   a second limiting support member (400) facing the second side of the yoke (41), spaced apart from the surface of the second side by a predetermined distance to form a second receiving space;

   The second elastic cavity member (300) is a flexible sealing cavity disposed on the second limiting support member (100) and located in the second receiving space;

   A second fluid medium supply system is in communication with the second elastomeric cavity component (300) for supplying a heated, pressurized fluid medium to the second elastomeric cavity component (300).
10. The process apparatus according to claim 9, wherein said controller (500) controls said first energy supply system and said second energy supply system to heat from said radial sides of said adhesive, respectively And increasing the temperature on both sides of the radial direction of the adhesive mixing space to an optimum curing temperature according to a set heating rate, and maintaining the set time length, and then making the radial direction of the adhesive mixing space The temperature on both sides is reduced according to the set cooling rate.
11. A process apparatus for curing an adhesive layer, the adhesive layer being coated on a first surface of a component, wherein the process apparatus includes a first energy transfer system, the first The energy transfer system includes:

    First limit support member (100);

    The first elastic cavity member (200) is a flexible closed cavity supported by the first limiting support member (100) and facing the first surface;

    a first fluid medium supply system (600) in communication with the first elastomeric cavity component (200) for supplying a pressurized fluid medium or a pressurized heating fluid medium to the first elastomeric cavity component (200), To squeeze the adhesive layer;

    Wherein the first elastic cavity component (200) includes a plurality of channels (240) connected in parallel, the plurality of channels being in communication with the first fluid medium supply system (600), respectively.
12. The process apparatus of claim 11 wherein said first fluid medium supply system (600) comprises a fluid medium pressurizer, a splitter manifold (645) coupled to the outlet side of said fluid medium pressurator And a returning mother pipe (655) connected to the inlet side of the fluid medium pressurizing machine, the splitter main pipe (645) being in communication with each of the channels through a branching branch pipe respectively communicating with each of the passages (240), the respective branching branch pipes a diverting branch valve is disposed, and the returning main pipe (655) is connected to each of the channels (240) through a return branch pipe respectively communicating with each channel (240), wherein each of the return branch pipes is provided with a return pipe valve;

    The first fluid medium supply system (600) further includes a heater (620) and a bypass line (660), the heater (620) and the bypass line (660) being connected in parallel to the fluid Between the medium presser and the splitter manifold (645);

    A third valve (652) is provided on the inlet side of the fluid medium press for introducing an external fluid medium into the first fluid medium supply system (600) or supplying the fluid medium from the first fluid medium System (600) is released.
13. The process apparatus according to claim 12, wherein said process equipment further comprises a controller (500), said controller (500) controlling said fluid medium press, said split manifold valve opening The opening of the return branch valve, the switch of the third valve (652), and the pressure-alternating fluid medium are filled into the respective passages (240); the controller (500) is sequentially opened by control Each diverting branch pipe valve controls the opening degree or opening duration of each diverting branch pipe valve, so that the pressure of each channel is sequentially increased or decreased sequentially, alternately and repeatedly repeated, thereby applying pulsation to the adhesive mixing space pressure.
14. The process plant of claim 12 wherein said process equipment further comprises a second energy transfer system, said second energy transfer system comprising:

    a second limit support member (400);

    a second elastic cavity member (300), which is a flexible closed cavity supported by the second limiting support member (100) facing the second surface of the member, the second surface and the first Relative surface

    a second fluid medium supply system in communication with the second elastic cavity member (300) for supplying a heated and pressurized fluid medium to the second elastic cavity member (300) to cause the second elasticity The cavity member (300) heats the second surface by pressing against the second surface.
15. A method for solidifying and forming a magnetic pole protective coating for a rotor of an electric machine, characterized in that the method adopts the process equipment according to claim 1, and the method is divided into a vacuum infusion process and a pressurized percolation process according to a process time. a heat curing process and a temperature drop and stress relaxation process, the method comprising a vacuum infusion process and a pressurized percolation process, and comprising the steps of:

    Performing the vacuum infusion process, injecting the adhesive into the vacuum bag (50) by a vacuum infusion process;

    Performing the pressurized percolation process, filling the first elastic cavity member (200) with a pressurized fluid medium through the first fluid medium supply system (600) to cause the first elastic cavity member (200) flexibly pressing the adhesive in the vacuum bag (50);

    Performing the heat curing process to heat the adhesive mixing space to cure the adhesive;

    The cooling and stress relaxation processes are performed to gradually cool the adhesive mixing space to room temperature.
16. The method of claim 15 wherein the pressurizing operation is performed by charging said first elastomeric cavity member (200) with a pressurized fluid medium by said first resilient cavity member (200 The fluid medium is released to perform a pressure relief operation, and the pressure of the pulsation is applied to the adhesive by alternately performing the pressurizing operation and the pressure releasing operation.
17. The method of claim 16 wherein said rotor is placed axially upright, said multi-layer annular passage (240) from bottom to top along the axial direction of said rotor (40) The first layer annular channel, the second layer annular channel, ..., the Nth layer annular channel, wherein the N is a natural number and is greater than or equal to 3, the first 1, 2, ..., N The pressure of the layer annular passage is represented by P ₁ , P ₂ , ..., P _N , respectively, and the ambient pressure is represented by P ₀ , and the pressurization operation includes the following step pressurization operation:

    The pressurized fluid medium is sequentially charged into the first, second, ..., N-layer annular passages, and such that P ₁ > P ₂ > ... > P _N > P ₀ .
18. The method of claim 17, wherein said pressurizing operation further comprises: performing said step pressurization operation a plurality of times such that each of said pressures P ₁ , P ₂ , ..., P _N One gradually increases, and keeps P ₁ >P ₂ >...>P _N >P ₀ .
19. The method of claim 18 wherein said pressure relief operation comprises the steps of:

    Performing a step pressure relief operation, in the step of the step pressure relief operation, in the order from the first layer annular channel, the second layer annular channel, the ..., the Nth layer annular channel, or according to the Nth layer The sequence of the annular passage, the ..., the second annular passage, and the first annular passage reduces each of the pressures P ₁ , P ₂ , ..., P _N of the multilayer annular passage small,

    The step pressure relief operation is repeatedly performed a plurality of times such that each of the pressures P ₁ , P ₂ , . . . , P _N is gradually decreased, and P ₁ >P ₂ >...>P _N >P is maintained. ₀ .
20. The method according to claim 19, wherein said adhesive is subjected to wave pressing by step-pressurizing said multilayer annular passage (240) and performing a step relief operation, so that said adhesive The agent seeps in the axial and radial directions of the rotor until the adhesive fills each slit in the adhesive mixing space and the radial thickness of the adhesive layer on the surface of the magnetic pole is uniform, Pressurized percolation process.

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