WO2019128045A1

WO2019128045A1 - Process equipment for sealing and curing liquid filler of motor armature after impregnation

Info

Publication number: WO2019128045A1
Application number: PCT/CN2018/087128
Authority: WO
Inventors: 马盛骏
Original assignee: 北京金风科创风电设备有限公司
Priority date: 2017-12-29
Filing date: 2018-05-16
Publication date: 2019-07-04
Also published as: CN109995202A; CN109995202B

Abstract

Process equipment for sealing and curing a liquid filler of a motor armature after impregnation. The motor armature (100) comprises a magnetically permeable member (10) and a coil winding (20) fixed on the magnetically permeable member (10). The motor armature (100) has an inner body cavity. The motor armature (100) is impregnated with a liquid filler, and is axially and horizontally placed in the process equipment. The process equipment comprises: an airflow supply unit for supplying heated and pressurized airflow; and an internal body choking unit (300) provided in the inner body cavity to generate upward pressure airflow to impact the motor armature (100) and choke the drop and dripping of the liquid filler on the motor armature (100). The process equipment can effectively block the liquid filler after an impregnation process to avoid excessive loss of the liquid filler, thereby enhancing the filling fullness of the motor armature, and improving the insulating property and service life of the motor armature.

Description

Process equipment for sealing and solidifying liquid filler after impregnation of motor armature

Technical field

Field of the Invention This invention relates to the field of electrical machinery and, more particularly, to a process apparatus for sealing and curing a liquid filler impregnation process for a motor armature of an electric machine.

Background technique

Taking the stator as an example, as shown in FIGS. 1-3, the motor armature 100 includes a magnetic conductive component 10 and a coil winding 20, and a winding slot 11 is disposed on the magnetic conductive component 10, and the coil winding 20 is embedded in the winding slot 11, and A wedge 30 is attached to the notch of the winding groove 11 to fix the coil winding 20 in the winding groove 11.

Fig. 4 is a perspective view showing the structure of the motor armature main body. As shown in Fig. 4, the coil winding 20 is fixed in the winding groove 11 of the magnetic permeable member 10 by a wedge 30, and includes a main body winding 21 located in the winding groove 11 and

end windings

22 and 23 at both axial ends of the motor. Although the coil windings are tightly held in the winding slots 11 by the wedges 30, there is still a large amount of gap between the coil windings 20 and between the coil windings 20 and the inner walls of the winding slots 11. Furthermore, the slot wedge 30 does not completely seal the slot of the winding slot 11, and therefore there is a radial gap between the slot of the winding slot 11 and the slot wedge 30. At the same time, there are axial slit openings at both ends of the winding groove 11. Therefore, the motor armature around which the coil winding 20 is wound is formed into a cylindrical porous body structure.

Because wind turbines are placed outdoors, they are subject to wind and rain. In particular, wind turbines installed at sea are more susceptible to salt spray. In addition, during the operation of the motor, the insulating film of the coil winding and the insulating layer such as the slot insulation in the winding slot are abraded by electromagnetic vibration and mechanical vibration, and are also subjected to heat and aging. Therefore, in order to ensure the insulation performance of the motor armature, it is also necessary to encapsulate the coil winding and its adjacent components with an insulating resin to form a tight and firm whole.

In order to improve the anti-corrosion performance and insulation performance of the motor armature, the motor armature is usually immersed, and the liquid armature of the motor armature and the magnet core is filled with a liquid filling material such as insulating varnish or insulating glue. The currently used dip coating process is a secondary dipping process belonging to the thermal immersion process, for example, a vacuum pressure dipping process (referred to as a VPI process). In the process of immersion paint, it is desirable that the liquid filler can penetrate into the various gaps of the motor armature better and more fully, and minimize the voids in the armature of the motor. During the dispensing process, it is desirable that the liquid fill material flow out of the stator motor armature as little as possible. However, since there is a radial gap between the wedge 30 and the slot, there is an axial gap at the end of the winding, although the liquid fill can enter the winding slot 11 during the dip coating process, but During the painting and drying process, a large amount of liquid filling material flows out of the winding groove 11 in the radial direction and the axial direction under the action of gravity and centrifugal force.

Figure 5 is a schematic illustration of a vacuum pressure impregnation process motor armature in a rotationally roasted state after dipping in accordance with the prior art. In the example shown in Figure 5, the motor is an outer rotor inner stator configuration in which the motor armature 100 is placed axially horizontally. When the motor armature 100 is rotated to the 6 o'clock position, the liquid filling material in the winding groove 11 flows not only outwardly along the outlets at both axial ends of the winding groove 11, but also along the notches of the wedge 30 and the winding groove 11. The gap between them drops down. At the 12 o'clock position, even if the liquid filling material in the winding groove 11 does not flow radially outward along the notch, it will flow outward along the outlets at both axial ends.

Therefore, in the process of insulating the motor armature 100 by the conventional insulation treatment process and process equipment, the liquid filler cannot be effectively prevented from flowing out from the slot (slot) in the radial direction, and along the axial direction. The direction flows outward from the axial ends of the winding slot, resulting in a lack of filling of the liquid filling material in the motor armature 100, and a large amount of voids exist on the surface of the ferromagnetic boundary, especially the surface of the ferromagnetic boundary is small and the paint layer is thin. In the notch portion, it is also difficult to form a strict sealing ring on the outer circumference of the groove wedge, so that a gap is formed between the groove wedge and the notched silicon steel sheet of the magnetic conductive member 10, and moisture and water naturally enter the groove along the debonding gap to break the insulation. It poses a safety hazard for the operation of wind turbines.

Summary of the invention

The object of the present invention is to provide a process equipment for suppressing the outflow of a liquid filling material of a motor armature, which improves the filling rate of the filling and impregnation of the filler after the varnishing, so as to effectively form a seal between the motor armature and the air interface area. The protection system reduces the risk that the motor armature is retained by moisture and water intrusion and improves insulation reliability.

According to an aspect of the present invention, there is provided a process apparatus for seal curing after a liquid filler dipping process for a motor armature, the motor armature including a magnetic conductive component and a coil winding fixed to the magnetic conductive component The motor armature has a body cavity, the motor armature is impregnated with a liquid filler, and is placed horizontally horizontally in the process equipment, the process equipment comprising: a gas flow supply unit, supplying heat and pressure Airflow; a main body internal choke unit, the main body internal choke unit is disposed in the main body cavity, generates an upwardly blown pressure airflow, impacts the motor armature, and clamps the liquid filler on the motor armature to droop And dripping.

According to the technical solution of the present invention, it is possible to reduce the radial loss of the insulating paint along the traditional ferromagnetic boundary (the laminated magnetic conductive component) and the axial loss of the ferromagnetic boundary during the dripping process after the varnishing, the conventional rotary baking curing process Improve the filling rate of the immersion varnish after immersion paint, and firstly block the gap of the natural lining of the insulating varnish during the heat curing process, and increase the boundary to prevent the intrusion of moisture and other media. The oxygen, moisture and water in the air are not easily invaded into the insulation of the tank, which can delay the aging process of the insulation system. Reduce the risk of moisture and moisture intrusion in the motor and improve insulation reliability.

DRAWINGS

The above and other objects and features of the present invention will become more apparent from the written description of the accompanying drawings in the claims

Figure 1 is a schematic view of a motor armature of a wind power generator;

2 is a perspective view showing a partial structure of a motor armature of a wind power generator;

Figure 3 is a partial cross-sectional view of a winding slot of a motor armature of a wind power generator;

Figure 4 is a perspective view showing the structure of the motor armature;

Figure 5 is a schematic view showing the motor armature in a rotary drying state according to the prior art insulation treatment process;

Figure 6 is a schematic illustration of a process apparatus for impregnating a liquid fill of a motor armature in accordance with a first embodiment of the present invention;

7 and 8 are schematic views showing the flow of a turbulent airflow formed in a process equipment according to an embodiment of the present invention;

9A, 10A and 11A are cross-sectional views of an airflow accelerator in a process equipment according to an embodiment of the present invention;

9B, 10B and 11B are perspective views of the variable cross-section flow paths of Figs. 9A, 10A and 11A, respectively;

FIG. 12 is a schematic view showing another arrangement structure of an airflow accelerator according to an embodiment of the present invention; FIG.

13-16 are schematic structural views of a main unit internal choke unit according to a first embodiment of the present invention;

Figure 17 is an exploded perspective view showing a process equipment according to a first embodiment of the present invention;

Figure 18 is a schematic view showing the operation state of the process equipment according to the first embodiment of the present invention;

Figure 19 is a block diagram showing the structure of a main internal internal choke unit according to a second embodiment of the present invention;

Figure 20 is a view showing another arrangement of the internal choke unit of the main body according to the second embodiment of the present invention;

Figure 21 is a cross-sectional view of a main body internal choke unit according to a second embodiment of the present invention;

Figure 22 is an exploded perspective view showing a process equipment according to a second embodiment of the present invention;

Figure 23 is a schematic view showing the operation state of the process equipment according to the second embodiment of the present invention.

Detailed ways

Embodiments of the present invention provide a process apparatus for suppressing outflow of liquid fill material in a cylindrical radial porous body structure component and enhancing solidification of the liquid fill material. According to the solution of the embodiment of the present invention, after the liquid armature (including various magnetic components of the magnetic conductive component and the coil winding) is immersed in the liquid horizontally horizontally placed in the process equipment for the rotary baking process, the motor is electrically A high-pressure airflow is formed between the pivotal and air-crossing regions, between the wedge and the radial gap of the magnetically permeable member, and the air-crossing region, and the applied high-pressure airflow can overcome the centrifugal force of the liquid filler by gravity and the rotating baking method, thereby Pressure sealing is used to construct a sealing protection system to prevent the liquid filling material from being excessively lost during the rotating baking process, thereby forming an air pocket inside the motor armature to improve the filling fullness. At the same time, through the lifting function of the high-pressure airflow, the hanging paint on the surface of the motor armature is prevented from flowing downward and falling, so that a thick protective coating is formed on the surface of the motor armature.

According to an embodiment of the invention, the high-speed airflow is obtained by means of the variable-section passage to pressure-seal the leakage gap of the motor armature, so that the ferromagnetic boundary of the motor armature has the radial direction of the insulating paint which prevents the primary dipping after vacuum pressure dipping. The dual function of loss and axial loss.

According to another embodiment of the present invention, by providing an air flow driving unit in the main body cavity of the motor armature, the air flow is blown upward to prevent the surface of the motor armature from dripping down. At the same time, since the airflow carries heat, heating the motor armature at both the inner and outer surfaces of the armature of the motor can accelerate the solidification of the liquid filler.

Hereinafter, a process apparatus and method according to the present invention will be described in detail with reference to the accompanying drawings.

Fig. 6 is a schematic view showing a process equipment for rotational bake of a motor armature according to a first embodiment of the present invention.

The process equipment according to the first embodiment of the present invention includes an airflow supply unit and a main body lower turbulence unit, and an air flow duct connected between the airflow supply unit and the main body turbulence unit. As shown in FIG. 6, the motor armature 100 is placed axially horizontally in a process equipment according to an embodiment of the present invention, and a main body lower choke unit is disposed at a lower portion of the motor armature 100 and forms a gas at a lower portion of the motor armature 100. High pressure accumulator chamber 268. During operation, the airflow supply unit heats and presses a gas (for example, air) to supply to a lower turbulence unit of the main body, and the lower turbulence unit of the main body supplies a high-pressure hot airflow to a lower side of the motor armature 100 at the motor armature 100. A high pressure airflow collecting region is formed in the lower gas accumulating chamber 268, and a pressure seal is formed on the liquid filling material from the lower portion of the motor armature 100 to prevent the liquid filling material from flowing out of the internal space of the motor armature 100, thereby preventing the liquid filling material from being blocked. The surface of the motor armature is drooping and falling.

As shown in FIG. 6, the airflow supply unit includes a compressor 210, a main heater 220, a splitter bus 230, a splitter branch 240, and the like. The main body choke unit includes a gas distribution chamber 250 and an airflow accelerator 260, and the controller 200 is equipped with the process equipment. Take overall control.

The heated and pressurized gas stream processed by the compressor 210 and the main heater 220 enters the splitter main pipe 230, and then flows into the gas distribution chamber 250 from different positions through the plurality of split pipe branches 240.

The air distribution chamber 250 and the air flow accelerator 260 are disposed in a circular arc shape, wrapped around the lower portion of the motor armature 100, preferably in a range exceeding 180 degrees around the lower portion of the motor armature 100, that is, covering at least the 3 o'clock position to 9 The clock position. The air distribution chamber 250 may be surrounded by a circular arc plate and a baffle disposed at an end of the circular arc plate to form a circular arc shaped cavity, and the branching branch pipe 240 is evenly arranged on the outer side of the circular arc shaped cavity along the circumferential direction, and The arcuate cavities are internally communicated such that the airflow delivered from each of the diverting manifolds 240 is converged within the interior of the plenum 250. The radially inner opening of the plenum 250 faces the airflow accelerator 260 and is in direct communication with the airflow accelerator 260. The airflow accelerator 260 forms a high-speed jet after the gas converging in the gas distribution chamber 250 is adjusted in direction and increased in flow rate, and is ejected in the radial direction onto the outer surface of the motor armature 100 as indicated by an arrow in FIG. The fluid accumulating chamber 268 is formed between the outlet of the airflow accelerator 260 and the lower surface of the motor armature 100, thereby forming a gas pressure sealing environment on the surface of the motor armature 100, forming a pressure seal on the slit opening of the liquid filling material. The liquid having a falling tendency acts as a lifting force to prevent the liquid filling material from flowing out and falling from the motor armature 100. Hereinafter, a detailed description will be made with reference to FIGS. 7 and 8.

7 and 8 illustrate flow diagrams of airflow in a process equipment in accordance with an embodiment of the present invention. As shown in FIGS. 7 and 8, after the airflow injected from the airflow accelerator 260 impinges on the lower surface of the motor armature 100, the gas flow energy is converted into stagnation pressure energy, which is sufficient for the outflow and dripping of the liquid filler. The stagnation pressure creates a pressure block on the gap in the motor armature, thereby preventing the liquid filling material from flowing out and dripping. Further, according to an embodiment of the present invention, the main body internal choke unit 300 may be disposed in the main body cavity of the motor armature 100, and the main body internal choke unit 300 forms an upwardly blown airflow, and the airflow acts on the magnetic conductive member 10. On the surface, the fluid kinetic energy is converted into pressure energy, which prevents the surface paint on the magnetically permeable component from dripping. When a stable high-pressure atmosphere is formed in the lower portion of the motor armature 100 and the main body cavity of the motor armature, stable pressure sealing can be formed on each slit port on the motor armature 100, in the lower portion of the motor armature 100, A pressure air cushion is formed in the lower portion of the

end windings

22 and 23 and the main body cavity of the motor armature, ultimately forming an upward lifting force that overcomes the effects of gravity and centrifugal force on the liquid filling material, preventing the liquid filling material from sagging and dripping.

Further, in the case where the radial vent hole 12 is provided in the magnetic conductive member 10 of the motor armature 100, a part of the airflow injected to the lower surface of the motor armature 100 passes through the radial vent hole 12 into the motor armature 100. The main body cavity passes through the inner cavity of the motor armature 100 and then passes through the upper radial vent hole 12 again, and then flows to the outside of the motor armature 100. Since the overall flow path of the radial venting opening 12 of the magnetically permeable member 10 is small, a pressure accumulating region is formed between the lower portion of the motor armature 100 and the airflow accelerator 260, and the region is always maintained at a high pressure state by subsequent flow. Therefore, an impact force or a pressure is formed on the liquid filling material injected into the motor armature 100, and the liquid filling material is continuously blocked from the lower portion in the radial inward direction to prevent the liquid filling material from flowing out of the winding groove 11, so that the liquid filling material The internal gap of the motor armature 100 is filled to avoid defects such as holes due to excessive loss of the liquid filler, and the filling rate and fullness of the liquid filler in the magnetic flux component groove are improved. On the other hand, since the airflow carries heat, while the impact motor armature 100 and the shuttle pass through the motor armature 100, the motor armature 100 and the liquid filling material are heated to cause the liquid filling material to become thick and lose fluidity. Block the gaps on the motor armature. By controlling the temperature of the gas stream, the gas flow is within the optimal curing temperature range of the liquid filler, facilitating the liquid filler to solidify as quickly as possible, and integrating with the motor armature components.

In the case where the airflow is impinged (sprayed) by the main body internal choke unit 300 to impinge (inject) the inner cavity of the motor armature 100 and the airflow passes through the radial vent hole 12 of the motor armature 100, it is possible to pass not only the airflow from the motor armature 100 The external heating of the motor armature 100 can also simultaneously heat the magnetically permeable member inside the motor armature 100, thereby rapidly heating the motor armature 100, accelerating the viscosity of the liquid filling material, and effectively preventing liquid filling. Outflow.

9A, 10A, and 11A respectively show cross-sectional schematic views of a gas flow accelerator 260 taken in the radial direction, in accordance with various embodiments of the present invention. 9B, 10B and 11B are perspective views showing one of the jet channels (corresponding to portions A, B, and C, respectively) of Figs. 9A, 10A, and 11A, respectively.

As shown in FIGS. 9A, 10A and 11A, the airflow accelerator 260 may include a plurality of accelerating columns 261 that are cylinders extending in the axial length direction of the motor armature 100. The lengths of the plurality of acceleration columns 261 are arranged along the axial direction of the motor armature 100, and are arranged in a substantially semicircular shape around the lower outer circumference of the motor armature 100, and the adjacent two acceleration columns 261 are spaced apart by a predetermined distance, generally Form a semicircular fence. An accelerating jet passage 262 in the radial direction is formed between the adjacent two cylinders 261. The accelerating jet passage 262 is a variable cross-sectional passage, and a throat 265 is formed between the inlet 263 and the outlet 264 of the accelerating jet passage 262. The cross-sectional area of the throat 265 is smaller than the cross-sectional area of the inlet 263 and/or the cross-sectional area of the outlet 264, thereby A nozzle is formed. Therefore, when the airflow flows through the throat 265 after flowing in from the inlet 263, it will be converted into a high-speed jet, and then flow out from the outlet 264, impacting the outer surface of the motor armature 100 in the radial direction.

The high velocity jet flowing from each of the accelerating jet passages 262 is generally vertical in the axial direction of the motor armature. These accelerating jet passages 262 may be formed at one-to-one correspondence with the wedges 30 on the winding main body 21, so that a high-speed jet formed from the accelerating jet passages 262 can impinge exactly on each of the wedges 30 and its peripheral region, sealing The gap between the wedge 30 and the slot is blocked to obtain a better pressure sealing effect.

The cross section of the acceleration column 261 can be substantially polygonal. As shown in FIG. 9A, the cross section of the accelerating column 261 may be substantially drum-shaped, or alternatively, as shown in FIGS. 10A and 11A, the cross section of the accelerating column 261 is substantially in the shape of a melon. However, the sectional shape of the acceleration column 261 is not limited thereto as long as a variable sectional passage is formed between the adjacent two acceleration columns 261. In addition, the arrangement of the airflow accelerator 260 is not limited to the examples shown in FIGS. 9A, 10A, and 11A. As shown in FIG. 12, the acceleration post 261 may also be formed in a semi-annular shape extending along the outer circumferential direction of the motor armature 100. And a plurality of acceleration columns 261 are spaced apart along the axial direction of the motor armature 100. A substantially semicircular annular jet passage is formed between the adjacent two accelerating columns 261, and the airflow accelerated by the annular jet passage impinges on the lower surface of the motor armature 100 (including the winding end) to prevent the liquid filler from flowing out. And dripping.

According to the process equipment of the embodiment of the present invention, a pressure field acts on the surface of the motor armature to form a pressure plugging of the liquid filling material, and at the same time, the heat of the high temperature air current is used to rapidly heat the motor armature to make the liquid filling. The material cures quickly. Therefore, in the case where the pressure field and the temperature field cooperate, the impregnation fullness of the filler can be effectively improved.

Referring again to FIG. 6, a gas recovery chamber 270 is further disposed at an upper portion of the motor armature 100, and the gas recovery chamber 270 can be in communication with the airflow supply unit to cause the recovered gas to undergo the next cycle. Further, an adsorption tower 275 may be provided to filter the recovered gas and then feed it to the compressor. Specifically, the airflow recovery chamber 270 collects the airflow passing through the motor armature 100 and pipes it to the adsorption tower 275 to remove toxic and harmful gases in the airflow, and separate combustible gases and the like. The combustible gas can be recycled and reused. The purified air stream passing through the adsorption tower 275 can be separated into moisture by the water gas separator 276 and then sent to the compressor 210 to prevent the moisture from causing corrosion or damage to the compressor 210. The separated water vapor can be used to preheat the new gas supplied to the compressor 210 through the partition wall heat exchanger.

A partition 274 may be disposed between the airflow accelerator 260 and the airflow recovery chamber 270 to separate the heated airflow from the recovery airflow in the circumferential direction. The circumferential end portion of the semicircular cylinder of the plenum chamber 250 may be disposed outside the end portion of the outer cylinder of the airflow recovery chamber 270 in the circumferential direction, and separated by the intermediate partition, so that the airflow accelerator 260 is matched The gas chambers 250 are in communication while being separated from the gas flow recovery chamber 270. However, in order to prevent the rotation of the motor armature 100 from being obstructed, a gap 273 is provided between the inner edge of the partition 274 and the outer surface of the motor armature 100 to prevent the partition 274 from scraping the outer surface of the motor armature 100. Therefore, the high pressure gas in the accumulator chamber 268 formed on the lower surface of the motor armature 100 overflows from the gap 273 into the gas flow recovery chamber 270. In this case, the gas is continuously supplied to the accumulator chamber 268 by the operation of the compressor 210, and the high pressure state of the accumulator chamber 268 is maintained.

Further, in the case where the radial vent hole is provided in the magnetic conductive member, the gas in the pressure accumulating chamber 268 is also lost, and enters the airflow recovery chamber 270 through the radial vent hole. The gas recovered in the gas recovery chamber 270 passes through the recovery line and enters the adsorption column 275 for the next cycle.

In the upper portion of the motor armature 100, an airflow overflow buffer chamber 278 may be disposed between the airflow recovery chamber 270 and the motor armature 100. The airflow overflow buffer chamber 278 may be disposed radially inward of the airflow recovery chamber 270 to accumulate airflow flowing out of the radial vents 12 of the motor armature 100 to reduce the airflow recovery chamber 270 and the lower accumulator chamber 268. The pressure difference between them reduces the amount of gas lost from the lower accumulator chamber 268 to better maintain the pressure in the lower accumulator chamber 268. The airflow overflow buffer chamber 278 may be semi-annular and provided with a uniformly arranged overflow port, so that the airflow flowing outward from the radial air vents 12 of the motor armature is uniformly and slowly diffused into the airflow recovery chamber 270. It then enters adsorption column 275 through a recovery line.

In the process equipment according to an embodiment of the present invention, in addition to heating the gas by the main heater 220, a plurality of auxiliary heating means may be provided. For example, as shown in FIG. 6, a first auxiliary heater may be disposed at an upper portion of the motor armature 100 to heat the motor armature 100 at an upper portion. For example, an electromagnetic induction heater, an auxiliary heating device such as a radiation emitting device may be disposed on the upper portion of the motor armature. In this case, the upper auxiliary heater may be disposed inside the airflow overflow buffer chamber 278.

In the case where the electromagnetic induction heater is provided, the electromagnetic energy of the electromagnetic induction heater is converted into thermal energy on the surface of the magnetic conductive member 10 and the surface of the wedge 30 due to the skin effect, so that the magnetic conductive member 10 and the wedge 30 are The outer surface first rises in temperature, lowering the surface energy of the liquid filler, causing the liquid to wet the surface of the magnetic conductive member 10 and the wedge 30, and solidifying and solidifying to form a bond with the surface of the magnetic conductive member 10. The transmitted radiation emitting device can be an infrared radiant heater. In the case where the infrared radiant heater is provided, the wavelength of the infrared electromagnetic wave can be controlled such that the infrared radiant electromagnetic wave more easily penetrates the liquid filling material to reach the surface of the magnetic permeable member 10, and converts the electromagnetic energy into thermal energy for the magnetic permeable member 10 The surface is heated. It is also possible to provide a magnetic shield on the outside of the electromagnetic induction heater and the infrared radiant heater to prevent leakage of electromagnetic waves.

The lower portion of the motor armature is heated by a high-pressure hot air flow formed by the turbulence unit at the lower part of the main body, and the inside of the magnetic conductive member is heated by the turbulence unit inside the main body, and at the same time, by providing an electromagnetic radiant heater and/or an infrared radiant heater, The upper part of the motor armature is heated, a variety of heating sources, and a plurality of heating modes cooperate with the armature of the motor armature, so that the cylinder can heat up at the same time both internally and externally, while suppressing the outflow of the liquid filling material. Promotes rapid curing of liquid fillers.

Further, in the airflow accelerator 260, a lower auxiliary heater may be provided. According to an example, the acceleration column 261 may be a hollow structure in which a second auxiliary heater may be disposed, and the second auxiliary heater may be an electric heater. The auxiliary heater may heat the acceleration column 261 to heat the airflow passing through the airflow accelerator 260 through the acceleration column 261. According to another example, the second auxiliary heater may also be disposed on the outer surface of the acceleration column 261, for example, an electric heating film is disposed on the side surface of the acceleration column 261. According to yet another example, an air flow passage may be provided in the acceleration column 261 to introduce a combustible gas into the air flow passage to combust the combustible gas in the air flow passage to heat the acceleration column 261. The flammable gas that is introduced may be a combustible gas recovered from the adsorption tower 275, thereby achieving comprehensive utilization of energy, saving energy and reducing emissions.

Next, the main body internal choke unit 300 will be described in detail with reference to FIGS. 7 and 8.

As shown in FIG. 7, the main body internal choke unit 300 includes an axial flow fan, and an upwardly blown airflow is formed by the axial flow fan to pressure-seal the paint on the upper portion of the inner wall of the motor armature 100 to prevent falling. In the case where the motor armature 100 includes the radial venting opening 12, the main body internal turbulence unit 300 blows the airflow entering from the lower radial venting opening 12 upward, so that the airflow passes through the upper radial venting opening 12 and enters the airflow recovery. In cavity 270. By continuously passing the hot air flow twice through the inside of the cylinder, the cylinder itself can be rapidly warmed up.

According to an embodiment of the invention, the main body internal choke unit 300 comprises at least one axial fan unit. The axial fan unit may include an axial fan or a multi-stage axial fan. In the examples shown in FIGS. 7 and 8, the axial fan unit is a multi-stage axial fan as an example, the multi-stage axial fan includes a first axial fan 310 and a second axial fan that are coaxially disposed. 320. The second axial fan 320 is disposed at a lower portion of the first axial fan 310, and the drive motor 330 is disposed therebetween to simultaneously drive the first axial fan 310 and the second axial fan 320. The diameter of the impeller of the first axial fan 310 is smaller than the diameter of the impeller of the second axial fan 320. The drive motor 330 may be a high temperature resistant furnace motor.

A plurality of multi-stage axial flow fans are arranged along the axial direction of the motor armature 100, and may be disposed only in an area corresponding to a straight line portion of the coil winding of the motor armature 100 (as shown in FIG. 7), or may be disposed in the slave The end winding 22 at one end in the axial direction is the other end winding 23 at the other end in the axial direction (as shown in Fig. 8). In the example shown in FIG. 8, the airflow accelerated by the airflow accelerator 260 not only impacts (or blows) the region corresponding to the wedge 30 but also impacts the

end windings

22 and 23 at both ends to simultaneously align with the end windings. The liquid filling liquid performs airflow sealing and pressure lifting, and simultaneously heats the root of the end winding, so that the liquid filling material at the axial end of the winding groove is heated to be solidified and solidified, and the fluidity is lost, thereby blocking The outflow slit of the liquid filling material is avoided to prevent the internal solidified liquid filling material from flowing out. Therefore, it is possible to simultaneously prevent radial loss and axial loss of the liquid filler.

In the case where the multi-stage axial flow fan is disposed in the inner cavity of the motor armature 100, when the multi-stage axial flow fan operates, a negative pressure is more likely to be formed in a region corresponding to the central axis of the impeller of the axial flow fan, and therefore, The negative pressure formed at the 6 o'clock position of the motor armature 100 is much higher than the negative pressure generated at the 3 o'clock and 9 o'clock positions, so that the air flow at the 6 o'clock position is more easily drawn by the axial fan 310. Suck. Therefore, in order to prevent the airflow from being unbalanced, the shunt 340 is disposed at the lower portion of the first axial fan 310. 13 and 14 are cross-sectional views of the multi-stage axial flow fan seen along the axial direction of the motor armature 100. As shown in FIGS. 13 and 14, the flow divider 340 has a circular arc shape in cross section, and is disposed around the inner circumferential surface of the motor armature 100 to guide the airflow to the suction port of the second axial flow fan 320 in the radial direction, thereby reducing The difference in airflow pressure in the circumferential direction near the small suction port.

In the example shown in FIG. 13, the impellers of the first axial fan 310 and the second axial fan 320 are planar impellers, and the diverter 340 includes a splitter circular arc plate 341 and a splitter cascade 342. The flow divider 340 is disposed above the inner circumferential surface of the motor armature 100. The splitter circular arc plate 341 is formed in a circular arc shape, and is provided with an air flow inlet to guide the air flow in the radial direction to the splitter cascade 342. The splitter cascade 342 includes a plurality of grids, the longitudinal direction of which is arranged along the axial direction of the motor armature 100, and the width direction of the plurality of grids is arranged along the radial direction of the motor armature 100, thereby A radial passage is formed between the grid plates. According to the need of adjusting the pressure, the splitter circular arc plate 341 may be provided in two, which are respectively disposed at the front end and the rear end of the splitter cascade 342. Through the flow divider 340, the pressure of the airflow in each direction can be uniformized.

As shown in FIG. 14, the impeller of the first axial flow fan 310 and the impeller 325 of the second axial flow fan may be spherical spherical impellers, and the convex arcuate surface faces the inner circumferential surface of the motor armature 100. In this case, the splitter 340 may only include the splitter cascade 342. A radial passage is formed between the splitter cascades 342 to adjust the airflow to a centripetal airflow.

As shown in FIGS. 15 and 16, a plurality of multi-stage axial fans may be supported together by a support rod 370. Specifically, the support bar 370 may be provided with a bracket, and the multi-stage axial flow fan 300 may be supported on each of the brackets. A plurality of multi-stage axial fans 300 may be placed together in or removed from the inner cavity of the motor armature 100 by a robot arm. Further, in the case where the main body end choke unit 500 is provided, end circular baffles 371 and 372 may be provided at both ends of the support rod 370 for sealing the shaft of the motor armature 100 at both axial ends. The inner space avoids the turbulent airflow in the inner cavity of the motor armature and the turbulent airflow at the end of the motor armature. 15 and 16 show a front view and a top view, respectively, of a multi-stage axial flow fan disposed on a support rod 370.

The necessity of suppressing the outflow and dripping of the liquid filler is mainly at the initial stage of baking. After the liquid filling liquid is gradually solidified, the main body internal turbulence unit 300 can be taken out from the shaft of the motor armature by the robot arm, thereby Reduce the resistance of the heated airflow.

As shown in FIG. 17, the process equipment according to an embodiment of the present invention may further include a body end choke unit 500. The main body end turbulence unit 500 may be two, respectively disposed at two ends of the motor armature 100 for blowing heated and pressurized airflow to the

end windings

22 and 23 to prevent the liquid filling material in the end winding from flowing out. The axial end outlet of the winding groove is blocked, and the liquid filling material at the end of the winding is accelerated, and the axial end outlet of the winding groove is blocked in time. Figure 17 shows an exploded view of the process equipment in accordance with an embodiment of the present invention, and Figure 18 shows a schematic view of the operational state of the process equipment in accordance with an embodiment of the present invention.

As shown in FIG. 17, the main body end choke unit 500 has a cylindrical structure as a whole, and includes an outer cylinder 510 and an inner cylinder 520, and an annular airflow passage is formed between the outer cylinder 510 and the inner cylinder 520. 512, an airflow return passage 513 is formed inside the inner cylinder 520. The airflow flows from the airflow conveying passage 512 to the winding end portion in the axial direction. After the end of the winding, the direction is changed to flow in the radial direction, and then enters the inner cylinder 520, from the airflow return passage 513 in the inner cylinder 520. After flowing out axially, it enters the adsorption tower 275.

The length of the outer cylinder 510 is greater than the length of the inner cylinder 520 such that the end of the outer cylinder 510 surrounds the outer circumferential surface of the end winding. An annular airflow diverter 530 may also be formed on the end of the outer cylinder 510, and a portion of the airflow transported along the airflow transport passage 512 flows along the inner wall of the outer cylinder 510 to the annular airflow splitter 530, and the airflow direction Change from axial to radial direction. The flow of air that is changed to the radial direction is capable of radially blocking the remaining axially flowing airflow, preventing the axially flowing airflow from flowing out through the gap between the end choke unit 500 and the winding ends. Preferably, the annular airflow splitter 530 covers the axial end of the wedge, so that the axially impinging airflow in the airflow passage 512 can block the axial end slit of the winding slot and change to a diameter. The portion of the flow to the flow forms a radial pressure seal at the end of the winding slot.

As shown in FIGS. 17 and 18, the annular flow splitter 530 includes a radial rib 521 formed at an end of the outer cylinder 510 and an annular baffle 522 disposed at an inner end of the radial rib 521. The radial rib 521 extends radially inward from the end of the outer cylinder 510 by a predetermined length, and the annular baffle 522 is spaced apart from the outer cylinder 510 by a predetermined distance so that the air flow from the outer cylinder 510 is in the air passage 512 A small portion of the airflow impinging along the axial direction enters the annular gap. Since the annular air deflector 522 is provided with an air flow outlet, the portion of the air flow entering the annular gap flows radially inward.

The airflow impinging on the ends of the windings in the axial and radial directions converges at the ends of the windings to form a high pressure converging region that prevents the liquid fill material in the winding slots from flowing out of the ends of the winding slots. In addition, the airflow is heated at the same time as the high-pressure plugging of the liquid filler, and the root of the winding is heated to promote the liquid filler at the end of the winding slot to be solidified first, and the outlet of the wedge end is blocked in time. The heated and pressurized air flow may be supplied to the main body end choke unit 500 by the air flow supply unit.

19-23 are schematic views of process equipment in accordance with a second embodiment of the present invention. The process equipment according to the second embodiment of the present invention differs from the first embodiment mainly in the structure of the choke unit inside the main body. In the first embodiment, the main body internal turbulence unit 300 includes a plurality of multi-stage axial flow fans, and in the second embodiment, the main body internal turbulence unit 300 includes a plurality of centrifugal blower units 600. The axial direction of the plurality of centrifugal fan groups 600 is parallel to the axial direction of the motor armature 100.

As shown in Figures 19 and 20, the centrifugal fan assembly 600 includes two

centrifugal fans

610 and 620 disposed back to back. The airflow in the lower portion of the centrifugal fan assembly 600 enters the

centrifugal fans

610 and 620 in the radial direction and then flows upward in the radial direction, passing through the radial vents through the magnetically permeable members and windings. By driving through the radial venting holes and the fan, the heating airflow is traversed from the lower part of the motor armature to the main body cavity of the motor armature, and then passes through the upper part of the motor armature again, strengthening the sealing of the liquid filling material. The heat exchange accelerates the solidification of the liquid filler, and the heat transfer to the motor armature is reduced to zero.

Depending on the axial length of the motor armature 100, a set of centrifugal wind turbines or sets of centrifugal fans can be provided. Since a negative pressure is easily formed at a position between two adjacent centrifugal fans, the airflow is more easily moved upward from the position into the radial vent. Therefore, in order to uniformly pass the airflow through the radial vents, a partitioning plate 630 may be provided between adjacent centrifugal fans to separate the airflows on both sides. Similarly, the centrifugal fan unit 600 can be placed inside or removed from the motor armature 100 via the support rod 370.

The centrifugal fan assembly 600 can also include a volute 640 having a flow guiding structure. FIG. 21 shows an axial cross-sectional view of the centrifugal fan assembly 600. As shown in FIGS. 19, 20 and 21, a lower portion of the upper portion of the volute 640 is provided with a flow guiding structure, and the volute 640 guides the air flow to the suction port of the centrifugal fan at the lower portion of the centrifugal fan, and is at the upper portion of the centrifugal fan. The airflow is blocked by the blocking protrusions 641, so that the airflow discharged from the centrifugal fan is discharged toward the upper portion of the inner cavity of the motor armature, preventing the airflow from being introduced into the suction port of the centrifugal fan again. In order to uniformly discharge the airflow in the circumferential direction, a flow guiding arc plate may be disposed at the airflow discharge port, and a grid-shaped exhaust port may be opened on the flow guiding arc plate. In order to make the airflow easier to enter the suction port of the centrifugal fan, the centrifugal fan is placed closer to the lower part of the inner armature of the motor.

22 and 23 are exploded and schematic views showing the process equipment according to the second embodiment of the present invention. Since the other components are the same as those of the first embodiment described above except for the configuration of the choke unit inside the main body, the description will not be repeated here.

During the post-impregnation curing of the motor armature, the heating temperature may be as high as 180 degrees. Therefore, the motor that drives the fan of the choke unit inside the main body can be a high-temperature furnace motor. Further, as shown in FIG. 23, the drive motor may be wrapped with a heat insulating material 570, and a cooling system 571 is provided to cool the drive motor.

For the second embodiment according to the present invention, the support rod 370 supporting the centrifugal fan unit may be an extension of the rotating shaft of the

centrifugal fans

610 and 620, and the support rod 370 is further supported in the inner cylinder 520 by the

brackets

380 and 390, and driven The motor 566 is disposed on the end of the support rod 370 and is stably supported by the

brackets

380 and 390. After the liquid filler is thickened to lose fluidity, the main internal choke unit can be removed by the robot arm. A track may be provided in the inner cylinder 520 to facilitate the overall insertion and removal of the choke unit inside the body.

The process equipment according to an embodiment of the present invention can perform drying and curing after the motor armature is once immersed and twice immersed. In addition, the concept of the present invention can be applied to any device that requires insulation treatment in addition to the motor armature.

In accordance with an embodiment of the present invention, as shown in FIG. 12, an optical imaging system 80 can be disposed beneath the motor armature, the optical imaging system 80 including a camera disposed below or inside the motor armature. For example, a camera can be mounted in an area of the motor armature corresponding to the slot wedge to monitor the state in which the liquid filling material flows out and drops from the slit opening at the slot wedge. The camera can be placed in the area of the motor armature from the 3 o'clock position to the 9 o'clock position. The liquid filling system 80 monitors the drooping and dripping state of the liquid filling material on the motor armature in real time, and the controller can control the pressure of the supplied gas based on the monitoring data, and/or adjust the temperature of the supplied gas. For example, when it is found that the liquid hangs downward, the pressure of the supplied air flow can be increased to bring the liquid droplets into a state of being adsorbed onto the surface of the motor armature.

According to an embodiment of the invention, in the lower part of the motor armature, a high-speed airflow is obtained by means of a variable-section passage to perform airflow or pressure sealing on the radial gap opening on the winding, thereby overcoming the centrifugal force of the insulating paint by gravity and the conventional rotary baking method, and preventing The drop of the insulating varnish even leaks out from the slit, so that the conventional ferromagnetic boundary (for example, laminated core) structure of the motor armature has the dual function of preventing the radial loss and axial loss of the insulating varnish after one dipping. In addition, at the end of the motor armature, an airflow impact is applied to the various tissue components of the winding end and the air interface region through the annular high-pressure airflow column, and a sealing protection system is constructed at the axial gap of the motor armature. According to the process equipment of the embodiment of the present invention, the dripping or drying process after the vacuum pressure impregnation process firstly blocks the gap of the liquid filler naturally lost, thereby avoiding the liquid filling material (such as the insulating paint) in the conventional rotary baking curing process. , radial loss and axial loss along the ferromagnetic boundary, which can improve the filling immersion rate of the filling medium after varnishing, increase the boundary to prevent the intrusion of moisture and other media, and make the oxygen in the air , moisture and water are not easy to invade the inside of the slot insulation, which can delay the aging process of the insulation system and prolong the service life of the motor.

The insulation treatment process of the motor armature (such as the VPI process) provided by the embodiment of the present invention axially axially the motor during the operation of the winding end and the gap between the wedge and the magnetic conductive component to prevent the liquid filler from escaping Horizontally placed in the curing cylinder, the positive pressure high-temperature airflow converges in the gathering pressure chamber to form a sealed airflow (fluid) to block the lower part of the winding, and the wedge and the magnetic conductive component are blocked by the centripetal jet and the gravity field mechanical balance airflow sealing. The fluid at the radial gap is lost. At the same time, an annular pressure sealing airflow can be formed at the axial end of the motor armature, and an upwardly impinging high-temperature shuttle airflow is formed inside the motor armature to heat the winding end and the magnetic conductive component to promote the liquid filling material. Curing as soon as possible.

Embodiments of the present invention provide a high temperature gas flow to a motor armature while providing a plurality of auxiliary heaters, for example, an electric heater is disposed in an outer surface or an inner cavity of the air flow accelerator, and a combustible gas is combusted in a lumen of the air flow accelerator, Or an electromagnetic induction heater, an infrared radiant heater, or the like is disposed above the motor armature to form a selective radiant heat source for various structural components (magnetic conductive members and windings) of the rotor or stator surface (convex or concave) of the motor. The electromagnetic vortex generator cooperates with the high-speed gas to perform forced heat release (convection heat release, radiation heat release) and excitation heat energy (electromagnetic wave) at the interface between the liquid and the solid various tissues, and the multiple capability fields cooperate to improve the liquid filling. The wetting of the contact surface increases the adhesion between the solid-liquid interface, prevents more liquid loss, improves the filling fullness rate, and improves the insulation performance and bonding strength of the motor armature.

Although in the above-described embodiments, the rotary drying of the motor armature is described in detail as an example, this does not mean that the process equipment according to an exemplary embodiment of the present invention is limited to impregnation and drying of the motor armature. The treatment can be applied to various similar processes that require drying and curing after the impregnation process. For example, it can be used in a treatment process for insulating the transformer structure, thereby suppressing the outflow of the liquid filler in the porous structural member, and improving the filling rate of the filler.

Although the embodiments of the present invention have been described in detail, the present invention is not limited thereto. Those skilled in the art will appreciate that modifications or variations can be made to these embodiments without departing from the spirit and scope of the invention.

Claims

A process equipment for sealing and solidifying a liquid filler impregnation process for a motor armature, the motor armature (100) comprising a magnetically permeable component (10) and a coil winding fixed to the magnetically permeable component (10) (20) The motor armature (100) has a body cavity, the motor armature (100) is impregnated with a liquid filler, and is placed axially horizontally in the process equipment, characterized in that Process equipment includes:

a gas supply unit for supplying a heated and pressurized gas stream;

a main body internal choke unit (300), the main body internal choke unit (300) is disposed in the main body cavity, generates an upwardly blown pressure airflow, impacts the motor armature (100), and clamps the motor electric The liquid filling material on the pivot (100) sag and drip.
The apparatus of claim 1 wherein said motor armature (100) has a radial venting aperture (12) through which said body internal choke unit (300) will pass (10) The airflow introduced by the lower radial vent (12) is blown upwards to cause the airflow to escape through the radial vents (12) of the upper portion of the motor armature (100).
The process equipment of claim 1 wherein said coil winding (20) includes end windings (22, 23) located at opposite ends of said motor armature, said portion of said air stream being blown while flowing upward The end windings (22, 23).
The process equipment according to claim 2, wherein said main body internal choke unit (300) comprises at least one axial flow fan unit, said axial flow fan unit being a multi-stage axial flow fan, said multi-stage shaft The flow fan includes at least two axial fans arranged coaxially, the at least two axial fans being spaced apart in a vertical direction.
The process equipment according to claim 4, wherein the impeller of the axial fan is a planar impeller or a convex spherical impeller, and a lower portion of the multi-stage axial fan is provided with a curved diverter (340). The arcuate diverter (340) includes a separator cascade (342) disposed in a radial direction that directs airflow into the body lumen to the suction port of the multi-stage axial fan.
The process equipment according to claim 2, wherein said main body internal turbulence unit (300) comprises at least one centrifugal fan unit (600), said centrifugal fan unit including first air venting facing first centrifugal a fan (610) and a second centrifugal fan (620), the airflow entering from the air inlets of the first centrifugal fan (610) and the second centrifugal fan (620) in the axial direction of the motor armature, along the armature of the motor The radial direction flows out from the air outlets of the first centrifugal fan (610) and the second centrifugal fan (620), and the main body cavity is sprayed upward.
The process equipment according to claim 6, wherein said centrifugal fan unit (600) comprises a volute (640) having a flow guiding structure, said volute (640) comprising a lower portion of the centrifugal fan unit (600) a curved baffle and a confluence chamber at the air outlet, the outlet of the confluence chamber is provided with an air guiding opening for uniformly guiding the airflow from the air outlet to the upper part of the main body cavity, The side of the volute (640) is further provided with a blocking protrusion (641) for preventing the airflow at the air outlet of the centrifugal fan unit (600) from returning to the suction port of the centrifugal fan group (600).
The process equipment according to claim 7, wherein the centrifugal fan group (600) is disposed near a lower portion of the main body cavity, and a partition plate is disposed between the first centrifugal fan and the second centrifugal fan (630) for separating the airflow in the axial direction of the motor armature (100) to uniformly pass the airflow through the radial vent (12) of the upper portion of the motor armature (100).
The process equipment according to any one of claims 6-8, wherein the main body internal choke unit (300) is supported by a support rod (370), the support rod (370) being the first An extension of a shaft of the centrifugal fan (610) and the second centrifugal fan (620), the internal choke unit (300) is integrally placed in the main body cavity by moving the support rod (370), or Take out the body cavity.
The process equipment of claim 1 further comprising a main body lower choke unit disposed at a lower portion of said motor armature (100) at a lower surface of said motor armature (100) Forming a pressure accumulating chamber (268) to accumulate airflow from the airflow supply unit in the accumulator chamber (268) to form a gas pressure sealing environment, preventing the liquid filler from the motor armature (100) Outflow and fall;

The main body lower turbulence unit includes a gas distribution chamber (250) and an air flow accelerator (260).

The air distribution chamber (250) has a substantially semicircular shape and is disposed around a lower portion of the motor armature (100), and the airflow received from the airflow supply unit is converged and sent to the airflow accelerator (260). The airflow accelerator (260) is disposed radially inward of the air distribution chamber (250) and includes a variable section passage (262) having a throat (265) disposed along a radial direction from the air distribution chamber ( 250) The introduced airflow is accelerated through the variable cross-sectional passage (262) and blown onto the lower outer surface of the motor armature.
The process equipment according to claim 10, characterized in that the magnetic conducting component (10) of the motor armature is provided with a winding slot (11), and the coil winding (20) is arranged in the winding slot (11) And fixed by a wedge (30), the airflow accelerator (260) includes a plurality of acceleration columns (261), the plurality of acceleration columns (261) being cylinders, the length direction along the motor armature An axial arrangement of (100), the plurality of acceleration columns (261) are spaced apart in a circumferential direction of the motor armature (100) at a lower portion of the motor armature (100) so as to be adjacent The variable cross-sectional passages (262) are formed between the two accelerating columns (261), and the plurality of variable-section passages (262) are respectively disposed in one-to-one correspondence with the wedges (30) of the motor armature.
The process equipment according to claim 10, wherein said airflow accelerator (260) comprises a plurality of acceleration columns (261), said acceleration columns (261) being arcuate cylinders, said plurality of acceleration columns ( 261) surrounding a lower portion of the motor armature and spaced apart in an axial direction of the motor armature (100) to form the variable cross-sectional passage between adjacent two acceleration columns (261) ( 262).
The process equipment according to claim 11 or 12, wherein the airflow supply unit comprises a compressor (210), a main heater (220), a gas flow main pipe (230), and a plurality of diverting branch pipes (240), The compressor (210) pressurizes the airflow and supplies it to the main heater (220), and the main heater (220) heats the airflow through the airflow main pipe (230) and the plurality of A split manifold (240) is delivered to the valve chamber (250).
The process equipment of claim 13 wherein said apparatus further comprises a first auxiliary heater, said first auxiliary heater being disposed in said airflow accelerator (260), said first auxiliary heater Is at least one of the following forms:

The first auxiliary heater is an electric heating film, which is laid on the surface of the acceleration column (261) for heating the airflow passing through the variable section passage (262);

The acceleration column (261) has a hollow inner cavity, and the first auxiliary heater is an electric heater disposed in a hollow inner cavity of the acceleration column (261) for heating the acceleration column (261). Heating the gas stream passing through the variable cross-section passage;

The acceleration column (261) has an internal air flow passage into which a combustible gas is passed, and the combustible gas is combusted in the internal air flow passage to heat the acceleration column (261) to pass through The gas flow of the variable cross-sectional passage (262) is heated.
The process equipment according to any one of claims 1 to 8, wherein a cooperative heating device is provided at an upper portion of the motor armature (100), the cooperative heating device comprising an electromagnetic induction heater and infrared radiation At least one of the heaters, the co-heating device applies heat to the surface of the magnetically permeable member (10), causing the surface of the magnetically permeable member (10) to first heat up,

The infrared radiation heater emits electromagnetic waves capable of penetrating the liquid filler;

An electromagnetic shield is disposed outside the electromagnetic induction heater.
The process equipment of claim 1 further comprising a body end choke unit (500), said body end choke unit (500) being disposed at said motor armature (100) The axial end portion applies a high-pressure heating airflow to the end of the motor armature (100) to heat and pressurize the end winding to suppress the outflow and dripping of the liquid filling material from the end portion.
The process equipment according to claim 16, wherein said body end choke unit (500) comprises an outer cylinder (510) and an inner cylinder (520) on the inner side of said outer cylinder (510) An annular airflow conveying passage (512) is formed between the outer cylinder body (510) and the inner cylinder body (520), and an airflow return passage (513) is formed in the inner cylinder body (520) through The annular airflow conveying passage (512) introduces a high temperature and high pressure airflow, impacts an end of the motor armature (100), and then the airflow enters the inner cylinder (520) through the airflow return passage (513) discharge.
The process equipment of claim 17 wherein said body end choke unit (500) further comprises an annular flow splitter (530), said annular flow splitter (530) being formed in said The inner side of the end of the outer cylinder (510) is sleeved outside the end windings (22, 23) of the motor armature (100) such that the axial direction introduced by the annular airflow conveying passage (512) After a portion of the airflow enters the airflow splitter (530), the direction of airflow changes from axial to radially inward, at the end of the annular airflow splitter (530) and the motor armature (100) A gas seal ring is formed therebetween.
The process equipment of claim 18 wherein said annular flow splitter (530) includes a radial rib (521) and an annular baffle (522), said radial rib (521) Extending radially inwardly from the outer cylinder (510) by a predetermined length, the annular baffle (522) being annular, disposed on the inner side of the outer cylinder (510), and the radial direction An inner end of the rib (521) is connected, and the annular baffle (522) is provided with an air outlet for radially entering the annular airflow diverter (530) from the air outlet Flow inside.
The process equipment of claim 10, further comprising a gas flow recovery chamber (270) disposed at an upper portion of the motor armature (100) for collecting airflow through the motor armature (100) Piped to the adsorption tower (275),

An annular partition (274) is disposed between the gas recovery chamber (270) and the pressure accumulating chamber (268) for the gas recovery chamber (270) and the pressure accumulating chamber ( The air flow in 268) is separated, and a gap (273) is left between the radially inner side of the partition plate (274) and the outer circumference of the motor armature (100), so that the pressure accumulating chamber (268) is a portion of the gas overflows into the gas recovery chamber (270),

An airflow overflow buffer chamber (278) is further disposed between the airflow recovery chamber (270) and the motor armature (100), from the gap (273) and the radial vent (12) The released air stream is discharged to the adsorption tower (275).