CN108092474B

CN108092474B - Pressure accumulator for armature liquid insulation rotary baking solidification

Info

Publication number: CN108092474B
Application number: CN201711487175.XA
Authority: CN
Inventors: 马盛骏
Original assignee: Beijing Goldwind Science and Creation Windpower Equipment Co Ltd
Current assignee: Beijing Goldwind Science and Creation Windpower Equipment Co Ltd
Priority date: 2017-12-29
Filing date: 2017-12-29
Publication date: 2020-01-31
Anticipated expiration: 2037-12-29
Also published as: CN108092474A

Abstract

The invention discloses an pressure accumulator for armature liquid insulation rotary baking solidification, wherein the armature comprises a winding and a ferromagnetic part, the ferromagnetic part is provided with a plurality of winding grooves which are distributed along the circumferential direction of the ferromagnetic part to be embedded into the winding, the pressure accumulator comprises a pressure accumulation element, the pressure accumulation element is provided with a plurality of fluid channels, and gas can be sprayed to a slit opening on the surface of the armature through the fluid channels.

Description

Pressure accumulator for armature liquid insulation rotary baking solidification

Technical Field

The invention relates to the technical field of motor manufacturing, in particular to a pressure accumulator for armature liquid insulation rotary baking solidification, which is used for preventing loss and promoting solidification in a rotary baking process.

Background

Referring to fig. 1 and 2, fig. 1 is a schematic view of a winding and a ferromagnetic component thereof in a wind turbine structure, which shows portions of the entire circumference of the ferromagnetic component, which is in a sector shape, and fig. 2 is a schematic view of the ferromagnetic component.

The ferromagnetic member 100' of the armature is formed by stacking core laminations 100a ', for example, silicon steel sheets or ferrite sheets, in the stacking direction, i.e., the axial direction of the finally formed ferromagnetic member 100', as shown in fig. 2.

As shown in fig. 3, fig. 3 is a schematic view of a single core lamination 100a' constituting the edge of a slot, the edge position being provided with a slot unit.

After the plurality of core laminations 100a ' are stacked, a plurality of slot units are stacked to form the winding slot 100b ', the longitudinal direction of the winding slot 100b ' is the axial direction of the ferromagnetic component 100', i.e., the stacking direction, and the depth of the winding slot 100b ', i.e., the depth of each slot unit, and the specific slot depth can also be understood with reference to fig. 2.

With continued reference to fig. 4, fig. 4 is a schematic diagram of the winding 200' of fig. 1 being inserted into the winding slot 100b ', fig. 5 is an enlarged view of a single winding 200' being inserted into the winding slot 100b ', fig. 6 is a schematic diagram of the winding 200' being inserted into a portion of the ferromagnetic component 100' and a portion of the winding slot 100b ', fig. 7 is a partial view of the winding 200' being inserted into the winding slot 100b ' and being received in the wedge 300', fig. 8 is a cross-sectional view of the winding 200' being inserted into a single winding slot 100b ', and fig. 9-1-9-3 are schematic diagrams of turns of the winding 200' being viewed from three different angles.

As shown in fig. 5, when a single winding 200 'is inserted, the side of the winding 200' is inserted into the upper portion of winding slots 100b ', which is called the upper component side 200a', and the side of the winding 200 'is inserted into the lower portion of winding slots 100b', which is called the lower component side, and two winding slots 100b 'are spaced between the two winding slots 100b' into which the upper component side 200a 'and the lower component side 200b' are inserted, each winding 200 'includes an upper component side 200a' and a lower component side 200b ', and the lower portion of each winding slot 100b' is inserted into the lower component side 200b 'of windings 200', and the upper portion is inserted into the upper component side 200a 'of windings 200'.

As shown in fig. 8, the winding slot 100b 'of the ferromagnetic component 100' defines a ferromagnetic boundary, and the upper element side 200a 'and the lower element side 200b' are spaced apart and provided with a temperature sensing element 400 'within the winding slot 100 b'. After the winding 200' is inserted into the winding slot 100b ', the wedge 300' is also inserted into the slot opening of the winding slot 100b ', and the wedge 300' has various shapes (refer to fig. 10-1 to 10-3), which function to fix the coil inside the slot. The conventional slot wedge 300' and the filler strip have: 3020 to 3023 phenolic laminate paperboard; bamboo (treated grade E); 3230 phenolic aldehyde laminated glass cloth plate, 3231 aniline phenolic aldehyde laminated glass cloth plate (B level); 3240 epoxy phenolic laminated glass cloth panel (class F); 3250 silicon organic epoxy glass cloth plate and poly diphenyl ether laminated glass cloth plate.

generally speaking, the insulation treatment is divided into two categories, namely, dip coating treatment and dip coating treatment, the dip coating treatment is mainly applicable to a stator winding 200 'of a low-voltage motor and an armature 200' of a direct-current motor, and the dip coating treatment is mainly applied to a coil of a high-voltage motor (dip coating before the coil 200 'is embedded), so that the insulation treatment of the motor winding 200' means that the insulation paint (or glue) is used for dipping and filling the inner layer of the coil 200 'and covering the surface of the coil 200', including the boundary between the filled coil 200 'and the ferromagnetic part 100' in a slot and covering the exposed surfaces of the slot wedge 300 'and the ferromagnetic part 100'.

The purpose of the insulation treatment of the winding 200' is:

(1) improve the moisture resistance. The insulating material absorbs moisture in humid air to different degrees, so that the insulating property is deteriorated, and after the insulating treatment is subjected to paint dipping, drying and curing processes, the pores of various tissue parts of the insulating material can be filled up, a smooth and compact paint film is formed on the surface, and the capability of preventing the moisture and other media from invading can be improved.

(2) Slowing down the aging degree and improving the heat-conducting property and the heat-radiating effect. Thus, the aging process can be delayed, thereby extending the service life of the insulating structure. The thermal conductivity (coefficient of thermal conductivity) of the insulating paint is more than several times of that of air, and the paint can improve the thermal conductivity of the insulating structure after filling the air gap and improve the heat dissipation effect.

(3) The insulating strength and other electrical properties of the insulating varnish are much higher than those of air, and after insulation treatment, the windings 200 'are bonded into whole bodies, so that the electrical properties of the windings 200' are improved, and insulation looseness and abrasion caused by electromagnetic force, vibration and cold and hot stretching are avoided.

(4) The chemical stability is improved. After insulation treatment, the paint film can prevent the insulation material from contacting harmful chemical media to damage the insulation performance.

Referring to fig. 10-1 to 10-3, fig. 10-1 is a schematic diagram illustrating the th winding 200 'being in insulation fit with the winding slot 100b', fig. 10-2 is a schematic diagram illustrating the second winding 200 'being in insulation fit with the winding slot 100b', and fig. 10-3 is a schematic diagram illustrating the third winding 200 'being in insulation fit with the winding slot 100 b'.

As described above, after the winding 200' is inserted into the winding slot 100b ', an insulation process is performed, and an insulation structure of the winding 200' in the ac low-voltage motor is described as an example, the rated voltage of the ac low-voltage motor is generally 3KV or less, and several levels such as 380V, 660V, 1140V are often used, and the insulation structure of the ac low-voltage motor includes inter-turn insulation c ', slot insulation a ', interlayer insulation b ' (a structure for the double-layer winding 200 '), inter-phase insulation, lead wire insulation (not shown in the drawings), and the like, and each of the following description is made:

(1) inter-turn insulation c': the random winding 200 'uses the insulation of its electromagnetic wire (i.e., copper or aluminum for winding, the surface of which is made into a wire with an insulation layer) as the inter-turn insulation c', such as enameled wire paint film, glass fiber covered wire covered with glass fiber or film wound with film. Can be understood with reference to FIGS. 10-2 and 10-3.

(2) In order to overcome the defect that highland barley paper is poor in heat resistance and easy to absorb moisture so that the polyester film is hydrolyzed, a polyester fiber paper and polyester film composite material (class B) and an aromatic polyamide fiber paper and polyimide composite material and the like are developed domestically in recent years, the insulation of the layers of the slot insulation a 'is different, the insulation close to the slot wall mainly plays a mechanical protection role so as to prevent the slot wall from damaging the main insulation, the layer of the insulation paper close to the electromagnetic wire of the winding 200' plays a role in preventing the main insulation from being damaged in the wire inserting process, and the insulation between the two layers (namely the main insulation of the slot insulation) is used for bearing the insulation strength, so that the mechanical force borne by the slot insulation a 'is increased along with the increase of the capacity of the motor, and the thickness of the slot insulation a' is increased along with the increase of the level of the capacity of the motor and the voltage.

(3) Interphase insulation (not shown in the figure): the ends of winding 200' are interleaved with the same composite material (DMDM or DMD) as the slot insulation.

(4) Interlayer insulation b': when the double-layer winding 200 'is adopted, the composite material (DMDM or DMD) which is the same as the slot insulation a' is filled between the upper layer coil and the lower layer coil of the same slot as the slot insulation b 'to be used as the interlayer insulation b'.

(5) Lead wire insulation (not shown in the figure): the leading-in flexible cable and cord of the motor winding 200 'mainly refers to the electric wire which is directly and permanently connected with the motor winding 200' and leads out of the shell binding post for connection.

Also shown in fig. 10-2 are protective insulation d ', ground insulation e ', and channel bottom straps f '.

Referring to fig. 12, fig. 12 is a schematic diagram of a winding 200 'and its ferromagnetic component 100' in a wind turbine structure suffering from multiphase flow erosion.

The motor includes a winding 200 'and a ferromagnetic member 100', which may form a stator or a rotor, as shown in fig. 12, forming an inner stator, having a rotor 600 'at an outer circumference, having a magnetic pole 500' at an inner circumference of the rotor 600', and the ferromagnetic member 100' fixed to a machine frame 101 'by a radial fastener 102'. The middle position of the stator is provided with a confluence channel 103 ', a hot air leading-out channel 104', an induced draft device 105 'and a confluence device 106'. The ferromagnetic member 100 'is formed by stacking a plurality of core laminations 100a' to form a plurality of radially extending ferromagnetic member radial passages, and the outer periphery of the ferromagnetic member 100 'forms ferromagnetic member radial passage inlets s', as shown in fig. 12, the following multiphase flow paths are formed:

the external environment of the cabin, the open air supply channel w, the ferromagnetic component radial channel inlet s ', the ferromagnetic component radial channel, the converging channel 103 ', the hot air leading-out channel 104', the air leading-out device 105' and the converging device 106 '.

In the external environment of the motor, there are wind, frost, rain, snow, sand and dust, salt mist, gas-liquid-solid multiphase flows, and these fluids circulate continuously through the above-mentioned flow path, and when there is a problem in insulation after the winding 200 'is embedded in the ferromagnetic member 100', the above-mentioned fluids continuously invade and erode the insulating layer, thereby damaging the motor.

As can be appreciated with reference to fig. 11-1-11-3, fig. 11-1 is a schematic illustration of a gap occurring at the location of the wedge 300 'in fig. 10-1, fig. 11-2 is a schematic illustration of a gap occurring at the location of the wedge 300' in fig. 10-2, and fig. 11-3 is a schematic illustration of a gap occurring at the location of the wedge 300 'in fig. 10-3. upon breaking of the bond line at the location of contact of the wedge 300' with the slot opening of the winding slot 100b ', a -sized gap (the gap extending axially and communicating the exterior with the location of the winding 200' inside the wedge 300) occurs, along which the external multiphase flow may encroach into the ferromagnetic component 100', the winding 200', and damage the electrical machine.

To this end, referring to fig. 13, fig. 13 is a schematic view of a slot wedge 300' for enhancing insulation. That is, a thermal expansion seal 300a 'is provided between the slot wedge 300' and the side wall of the winding slot 100b ', which thermal expansion seal 300a' may enhance the seal between the slot wedge 300 'and the winding slot 100b' to prevent the ingress of external fluids.

Therefore, it is necessary to prevent the intrusion of external fluid and ensure the insulation effect. However, the insulation reliability problem still cannot be solved by the above-mentioned insulation dip coating treatment, as shown in FIGS. 11-1 to 11-3.

The traditional paint dipping process is mainly a vacuum pressure paint dipping (VPI) process. The process comprises the following steps:

in the VPI process, the object to be impregnated is first placed in a closed vacuum chamber at a pressure of about 1 mbar. Next, the resin that had been pretreated (viscosity check, addition of curing agent, cooling) and degassed, placed in a separate container, was heated to several tens of degrees celsius via a heat exchanger, such as: at 70 c and then pumped into the vacuum chamber until the impregnated object is completely flooded (submerged) and covered with the warm resin.

Preheating of the resin is important because it significantly reduces the viscosity of the resin, thereby allowing the resin to more easily enter and fill the slot gap. The vacuum was then released and the pressure in the chamber was increased to 3-5bar (bar, pressure unit) and allowed to dwell for several hours. Finally, the resin is pumped back into the cold container through the heat exchanger, cooling the resin in the storage container, which is very important for the unhardened resin life. And subsequently, placing the impregnated object into an oven, and thermally baking to harden and cure the resin.

Therefore, it is difficult to achieve reliable insulation effect, and the following contradictions exist mainly in the current paint dipping process:

the viscosity of the paint is related to the amount of solvent, and the more solvent, the lower the solids content and the lower the viscosity of the paint. If the low-viscosity paint is used, the paint has strong penetrating capability and can well penetrate into gaps of the winding 200', gaps among layers of the solid insulating material and gaps of the solid insulating material organizational structure (such as porous materials); however, with low-viscosity paints, the binder content is low, and when the solvent evaporates, a large number of voids remain (voids are the source of so-called breathing phenomena, which can damage the insulation), affecting the moisture resistance, thermal conductivity, mechanical strength and dielectric strength. If the paint used has too high a viscosity, it is difficult for the paint to penetrate into the interior of the winding 200', i.e., a "penetration" phenomenon occurs, and the moisture resistance, thermal conductivity, mechanical strength and electrical strength are likewise undesirable.

The method is characterized in that a secondary paint dipping process is adopted in a motor produced by a domestic motor factory, the drying frequency is 2, the paint dipping process comprises prebaking, th paint dipping, paint dripping, th drying, second paint dipping, paint dripping and second drying, when th paint dipping is carried out, the time for paint dipping is longer than in order to enable the paint to be well filled into the winding 200', the second paint dipping is mainly used for forming a surface paint film, from the aspect of , if the time for the second paint dipping is too long, the th paint dipping film is damaged, so that a good paint dipping effect can not be obtained, contradiction exists in the time scale in the two paint dipping processes, the paint loss is not only influenced, but also the paint hanging amount of the inner and outer circular surfaces of a secondary paint dipping iron core is influenced, the paint hanging amount is small, the paint is not required to be scraped, but gaps exist in slot insulation, and the hidden danger that water is sucked and the insulation material is damaged (the so-called breathing phenomenon of a porous insulation material in the slot) is generated).

In summary, in the case of the conventional insulation treatment of the winding 200 'and the ferromagnetic part 100', there is a conflict that the paint, if it can enter well, cannot be prevented from running off; if the run-off of the lacquer is reduced, the lacquer is difficult to penetrate well again.

In view of this, how to improve the molding process of the motor and improve the insulation performance between the motor winding and the ferromagnetic component is a technical problem to be solved urgently by those skilled in the art.

Disclosure of Invention

Therefore, the invention provides pressure accumulating devices for liquid insulation rotary baking and curing of electric armatures, which can improve the filling and impregnating fullness rate of impregnating liquid after impregnation and improve the insulation performance of motor windings and ferromagnetic parts.

The pressure accumulating device for armature liquid insulation rotary baking solidification provided by the embodiment of the invention comprises a winding and a ferromagnetic part, wherein the ferromagnetic part is provided with a plurality of winding grooves distributed along the circumferential direction of the ferromagnetic part to be embedded into the winding, the pressure accumulating device comprises a pressure accumulating element, the pressure accumulating element is provided with a plurality of fluid channels, and gas can be sprayed to a slit opening on the surface of the armature through the fluid channels.

Optionally, the armature comprises a slot wedge for enclosing the winding slot opening, the slot opening comprising a slot opening between a slot wall of the winding slot and the slot wedge; or, only the winding is embedded in the winding slot, and the gap opening comprises a gap opening between the slot wall of the winding slot and the winding.

Optionally, the ferromagnetic component is formed by stacking ferromagnetic laminations, and the slit aperture comprises a slit aperture between adjacent ferromagnetic laminations.

Optionally, the pressure accumulating element is arc-shaped and matched with the peripheral wall of the ferromagnetic component provided with the winding slot, and the air injection paths of the plurality of fluid channels extend along the radial direction of the pressure accumulating element.

Optionally, the pressure accumulating element is arc-shaped and matched with the peripheral wall of the ferromagnetic part provided with the winding slot; the air injection path of the fluid channel positioned in the middle of the pressure accumulating element extends along the radial direction of the pressure accumulating element, and the air injection paths of other fluid channels form included angles with the radial direction from the clockwise direction and the anticlockwise direction of the fluid channel, so that the air injection pressure has a tangential component and gradually increases.

Optionally, the fluid channel is a convergent-divergent channel, or tapers in the direction of the jet.

The gas is collected in the confluence cavity, then enters the fluid channel of each pressure accumulating element respectively, enters the pressure accumulating cavity, and provides gas with constant pressure to the direction of the notch of the corresponding winding groove.

Optionally, the gas collecting device further comprises a main pipe and a shunt pipe, the gas enters the confluence cavity through the main pipe and the shunt pipe, and the shunt pipe is communicated and uniformly distributed in the confluence cavity;

and each shunt tube is provided with a flow control valve and/or a flow sensing transmitter for monitoring the shunt tube entering the confluence cavity.

Optionally, the pressure accumulating element is further provided with a heating channel.

Optionally, the inner wall of the heating channel is provided with an electric heating film, or,

the heating channel is a fuel gas channel, and combustible gas generated when the armature is baked is introduced into the fuel gas channel.

Optionally, the pressure accumulating element is arc-shaped with a central angle greater than or equal to 180 degrees, so that its gas supply region covers at least the winding slots within 180 degrees of the armature.

Optionally, each of the fluid passages extends linearly in an axial direction of the pressure accumulating element, and the air injection path extends substantially in a radial direction of the pressure accumulating element; and, a plurality of said fluid passages are distributed arcuately.

Optionally, the inlet of each of the fluid channels is of the same size and the outlet of each of the fluid channels is of a different size to achieve the same inlet pressure and different outlet pressures, the outlet pressures of the fluid channels decreasing progressively in both clockwise and counterclockwise directions from the center of the pressure accumulating element.

Optionally, each of the fluid passages extends along a circumferential arc of the pressure accumulating element, the air ejection path extending generally radially of the pressure accumulating element; and, a plurality of said fluid passageways are axially distributed along said pressure accumulator element.

Optionally, a heating channel is formed between adjacent fluid channels.

Optionally, still include gaseous recovery chamber, gaseous recovery chamber simultaneously with the pressure accumulation chamber, the butt joint of pressure accumulation component forms the ring chamber, gaseous recovery chamber is equipped with external air current and retrieves the interface.

Optionally, a partition plate is further provided, the partition plate separates the gas recovery chamber from the pressure accumulating element and the pressure accumulating chamber, and a predetermined gap is left between the partition plate and the periphery of the ferromagnetic component, so that the gas in the pressure accumulating chamber can only flow to the gas recovery chamber through the predetermined gap.

Optionally, the winding is placed in the winding slot to form winding end portions protruding out of two ends of the winding slot, the pressure accumulator further comprises an annular cover fixed with the armature, and the annular cover covers a plurality of winding end portions distributed annularly and is clamped and covered at the port position of the winding slot; the annular cavity of the annular shroud can be inflated to inject gas to the port location.

Optionally, a gas slip ring is further included through which gas is supplied to the annular shroud.

Optionally, the ferromagnetic component sets the circumferential wall of the winding slot to be the circumferential wall of the winding slot, the annular cover is sealed with the circumferential wall of the winding slot corresponding to the annular side wall of the circumferential wall of the winding slot, and a piece of release cloth is arranged between the annular side wall and the circumferential wall of the winding slot.

Optionally, the annular side wall of the annular cover corresponding to the circumferential wall of the winding slot is a hollow side wall, the hollow side wall is close to the end body of the winding slot to form or is separately provided with an air outlet ring, the air outlet ring is provided with an air outlet, the air outlet faces the port position of the winding slot from the side face of the ferromagnetic component, and the hollow side wall can be filled with air so that the air can be discharged through the air outlet.

Optionally, the pressure accumulator device has an end plate facing the gas outlet ring close to the circumferential wall of the winding slot, the gas outlet ring being further provided with a gas outlet facing the circumferential wall of the end plate.

Optionally, the end plate is further provided with sealing teeth adjacent to the circumferential wall of the winding slot; a contact sensor is arranged between the peripheral wall of the end plate and the air outlet ring so as to detect the distance between the peripheral wall and the air outlet ring.

The pressure accumulator in this embodiment can blow air to the slit opening on the surface of the armature through the air seal portion. Therefore, under the action of air injection pressure, the impregnating liquid can be prevented from flowing out of the slit under the action of gravity, so that the impregnating liquid is prevented from flowing away along the slit on the surface of the armature in the subsequent impregnating and paint dripping process and the rotary baking process of the vacuum pressure impregnation process of the armature, the filling rate of the impregnating liquid after impregnation is improved, the slit which is naturally drained away by the impregnating liquid is sealed and locked in the process, and the capacity of preventing moisture and other media from entering in the external environment is improved. Taking the slit opening between the winding slot and the slot wedge as an example, the void between the straight-line segment part of the winding (the part positioned in the winding slot) and the boundary of the ferromagnetic part can be prevented, the void between the straight-line segment part of the winding and the slot wedge can be prevented, and the capability of preventing moisture and other media in the external environment from entering is increased. Oxygen, moisture, water and the like in the air are prevented from entering the gap openings on the surface of the armature, for example, in the case of winding slots, the aging process of the insulation system can be delayed by only preventing the medium from entering the interior of the insulator formed after the winding slots are soaked. Thereby reducing the risk that the motor is soaked in moisture and water and is reserved therein, and improving the insulation reliability.

Drawings

FIG. 1 is a winding in a wind turbine system configuration showing portions of the entire ferromagnetic member circumference, in the form of sectors;

FIG. 2 is a schematic view of a ferromagnetic component construction;

fig. 3 is a schematic view of the edges of a single core lamination forming slot;

FIG. 4 is a schematic view of the winding of FIG. 1 inserted into a slot;

FIG. 5 is an enlarged view of a single winding embedded in a slot;

FIG. 6 is a schematic view of a winding embedded in a partial slot of a partially ferromagnetic member;

FIG. 7 is a partial view of the windings after being inserted into the slots and wedged therein;

FIG. 8 is a cross-sectional view of a single slot with a winding embedded therein;

FIGS. 9-1-9-3 are schematic diagrams of turns of a winding viewed from three different angles;

FIG. 10-1 is a schematic view of winding types in insulation fit with a slot;

FIG. 10-2 is a schematic view of a second winding in insulative engagement with a slot;

FIG. 10-3 is a schematic view of a third winding in insulative engagement with a slot;

FIG. 11-1 is a schematic illustration of the occurrence of a gap at the wedge position of FIG. 10-1;

FIG. 11-2 is a schematic illustration of the wedge position of FIG. 10-2 showing a gap;

FIG. 11-3 is a schematic view of the wedge position of FIG. 10-3 showing a gap;

FIG. 12 is a schematic illustration of a wind turbine structure in which the windings and their ferromagnetic components are subject to multi-phase flow erosion;

FIG. 13 is a schematic view of a slot wedge for enhanced insulation;

FIG. 14 is a schematic structural view of an embodiment of the armature baking apparatus according to the present invention;

FIG. 15 is a schematic view of the armature during a bake rotation;

fig. 16-1 is a schematic illustration of a winding slot and its inner winding at the 12 o' clock position;

fig. 16-2 is a schematic view of the winding slot of fig. 16-1 without the windings and slot wedges embedded therein;

figure 17-1 is a schematic winding slot with its inner winding at the 3 o' clock position;

FIG. 17-2 is an enlarged schematic view at the wedge 17-1;

fig. 18 is a schematic view of a winding slot and its inner windings at the 6 o' clock position; winding slot

FIG. 19 is a schematic illustration of prevention of dip-liquid loss at the ferromagnetic boundary of a ferromagnetic part after provision of a gas seal, showing the mechanical effect of the physical location of the most vulnerable liquid loss during the spin bake process;

FIG. 20-1 is a schematic view of the pressure accumulating element of FIG. 14;

FIG. 20-2 is a schematic view of fluid channel cells of FIG. 20-1;

FIG. 20-3 is a schematic top view of FIG. 20-1;

FIG. 20-4 is a left side schematic view of FIG. 20-1;

FIG. 21-1 is a schematic view of another pressure accumulating elements;

FIG. 21-2 is a schematic view of fluid channels in FIG. 21-1;

FIG. 22-1 is a schematic view of another pressure accumulating elements;

FIG. 22-2 is a schematic view of fluid channels in FIG. 22-1;

FIG. 23 is a schematic view of combustible gas being provided to a heating tunnel;

FIG. 24 is a schematic view of the baking source of FIG. 14 positioned above the windings of the motor;

figure 25 is a bottom view of the armature of figure 24;

FIG. 26 is a schematic diagram of electromagnetic eddy currents induced in a single lamination stack;

FIG. 27 is a top view of the torrefaction source;

FIG. 28 is a schematic diagram of the position of the baking source and the baffle plate in a top view;

FIG. 29 is a schematic top view of the gas seal;

figure 30 is an axial cross-sectional view of the motor winding of figure 14;

FIG. 31 is a schematic view of the lower annular shield of FIG. 30 at a left angle;

FIG. 32 is an enlarged view of portion A of FIG. 30;

FIG. 33 is a schematic view of the gas slip ring of FIG. 30;

FIG. 34 is a right side view of FIG. 33;

fig. 35 is a schematic structural view of another embodiment of an armature during a post-liquid-immersion insulation curing process;

FIG. 36 is a schematic view of another embodiment of a rotary baking apparatus for an armature according to the present invention;

FIG. 37 is a schematic view of the air jets of FIG. 35 illustrating prevention of flooding of the impregnating liquid;

FIG. 38 is a schematic view of a vision system monitoring the gas-liquid interface formed by the immersion liquid and the ambient gas around the gap opening between the ferromagnetic component and the slot wedge at different locations in the windings of the motor in accordance with an embodiment of the present invention;

FIG. 39 is a block diagram schematic of the components of the vision system of FIG. 38;

fig. 40 is an image of fig. 38 at three different times in the 4.5-point (4-point half) direction.

The reference numerals in fig. 1-13 are illustrated as follows:

100 'ferromagnetic part, 100a' ferromagnetic lamination, 100b 'winding slot, 101' frame, 102 'radial fastener, 103' bus channel, 104 'hot air outlet channel, 105' induced air device, 106 'current collector, s' ferromagnetic part radial channel inlet;

200 'winding, 201' winding end, 200a 'upper element side, 200b' lower element side;

300' slot wedge, 300a ' thermal expansion moisture plugging leakage sealing piece, 400' temperature sensing piece, 500' magnetic pole and 600' rotor;

a 'slot insulation, b' interlayer insulation, c 'turn-to-turn insulation, d' protective insulation, e 'ground insulation and f' slot bottom filler strip;

w-open air supply channel;

the reference numerals in fig. 14-40 are explained below;

100 ferromagnetic parts, 100a ferromagnetic laminations, 100b winding slots, 100aL ferromagnetic boundaries, 101 frames, 102 radial fasteners, 103 bus channels, 100c inner perimeter wall surfaces;

200 windings, 201 winding ends, 200L winding boundaries and 200f slot bottom insulation;

300, a slot wedge;

10 gas recovery chamber, 20 baking source, 201 magnetic shielding boundary, 202 magnetic shielding, 203 electromagnetic induction coil, 204 far infrared emission device, 205 bus bar, 206 induction heating power supply;

30 air seal parts and 31 confluence cavities;

32. 32', 32' pressure accumulation elements;

32a, 32a', 32a ";

32b, 32b', 32b ″ heat the channels;

33 plenum chamber, 301 end plate, 301a seal teeth;

41 main pipe, 42 shunt pipe, 43 flow control valve, 44 flow sensing transmitter, 45 gas slip ring, 46 gas flow inlet interface, 47 gas flow recovery interface, 50 annular cover, 501 outer side wall, 501a gas outlet ring, 60 baffle, 70 contact sensor, 80 optical imaging device, 801 light source, 802 visual sensor;

the device comprises an adsorption tower 1, a separator 2, a compressor 3, a heater 4, a controller 5 and an air filter 7 of a 6-dividing wall type heat exchanger;

q overflowing liquid;

a flow sensor, b temperature sensor, c pressure sensor, d combustible gas measurement analyzer, and e rotary driver.

Detailed Description

In order to make those skilled in the art better understand the technical solution of the present invention, the following detailed description is made with reference to the accompanying drawings and specific embodiments.

Referring to fig. 14, fig. 14 is a schematic structural diagram of an armature baking apparatus according to an embodiment of the present invention.

As shown in fig. 14, the ferromagnetic component 100, also called an iron core, may be formed by axially stacking a plurality of ferromagnetic laminations 100a, where the ferromagnetic laminations 100a may be, for example, silicon steel sheets or ferrite sheets, and the structure of the ferromagnetic component 100 and the winding manner of the winding 200 may specifically refer to the background art, which is not limited in this embodiment.

The ferromagnetic part 100 of the armature is provided with a plurality of winding slots 100b distributed along its circumference to house the windings 200, the notches of the winding slots 100b facing radially outward in fig. 14. The winding slot 100b has a length direction parallel to the axial direction of the ferromagnetic member 100, and the winding slot 100b penetrates the circumferential wall of the ferromagnetic member 100 in the axial direction. In fig. 14, the winding slot 100b penetrates through the outer circumferential wall of the ferromagnetic member 100, and the ferromagnetic member 100 may be used as an inner stator, i.e., a rotor is provided at the outer side in the radial direction of the armature and a stator is provided at the inner side, and when the ferromagnetic member 100 is used as an outer stator, the winding slot 100b penetrates through the inner circumferential wall of the ferromagnetic member 100.

Specifically, after the winding 200 is placed in the winding slot 100b, the slot wedge 300 for covering the winding 200 is disposed at the notch of the winding slot 100b, and during a subsequent impregnation process (e.g., a vacuum pressure impregnation process, abbreviated as VPI), an impregnation liquid (i.e., an insulating varnish, or an adhesive component is simultaneously filled in the insulating varnish) as an insulating medium may flow out from a gap between the slot wedge 300 and the winding slot 100 b.

Fig. 15 is a schematic view of the armature during a bake rotation, as shown in fig. 15-18, showing the winding 200 and winding slots 100b in four typical positions, 12 o 'clock, 3 o' clock, 6 o 'clock and 9 o' clock physical positions, respectively; fig. 16-1 is a schematic illustration of the winding slot 100b and its inner winding 200 at the 12 o' clock position, showing the ferromagnetic boundary 100aL, the winding boundary 200L, the slot bottom insulation 200 f; fig. 16-2 is a schematic view of the winding slot 100b of fig. 16-1 without the winding 200 and the slot wedge 300 embedded therein; fig. 17-1 is a schematic illustration of a winding slot 100b and its inner winding 200 at the 3 o' clock position, with the winding slot 100b in a horizontal position and the immersion liquid inside having a tendency to flow downward; FIG. 17-2 is an enlarged schematic view at 17-1 slot wedge 300; fig. 18 is a schematic illustration of the winding slot 100b and its inner winding 200 at the 6 o' clock position, with the immersion liquid flowing out of the slot opening of the winding slot 100b, forming an overflow Q of liquid.

To this end, the rotary roasting apparatus in this embodiment further includes an air seal 30 that blows air at least to the winding slot 100b whose notch is facing downward during rotation.

Therefore, under the action of air injection pressure, the impregnating liquid can be prevented from flowing out of the gap between the slot wedge 300 and the winding slot 100b under the action of gravity, so that the radial loss of the impregnating liquid along the gap between the traditional slot wedge 300 and the winding slot 100b in the subsequent dipping and paint dripping process and the rotary baking process of the armature in the vacuum pressure dipping process is reduced, the filling and impregnating fullness rate of the impregnating liquid after dipping is improved, a gap opening where the impregnating liquid naturally flows away is sealed and locked in the process, a cavity is prevented from being generated between the linear section part of the winding 200 (the part located in the winding slot 100b) and the boundary of the ferromagnetic part 100, a cavity is prevented from being generated between the linear section part of the winding 200 and the slot wedge 300, and the capacity of preventing the intrusion of moisture and other media in the external environment is increased. Oxygen, moisture, water and the like in the air are not easily intruded into the interior of the insulator formed after the winding slot 100b is impregnated, and the aging process of the insulation system can be delayed. Reduce the risk that motor moisture and water invade and persist wherein, improve insulating reliability.

As can be understood with reference to fig. 19, fig. 19 is a schematic view of the immersion liquid loss at the ferromagnetic boundary 100aL of the ferromagnetic part 100 after the gas seal 30 is disposed, showing the mechanical effect view of the physical location where the liquid is most prone to loss during the spin baking process. The ferromagnetic component 100 is fixed to the frame 101 by means of radial fixings 102, and the central part of the armature mechanical support structure has a bus passage 103, as will be appreciated in connection with figure 12 of the background art, the upward gas injection pressure from the gas seal 30 disrupts the flow path and prevents ambient medium from entering the winding slots 100 b.

As can be seen from the above description of the effects, the air is blown at least toward the winding slot 100b with the notch facing downward, because the immersion liquid in the winding slot 100b is not supported and is most likely to overflow outward under the action of gravity when the notch faces downward, and the tendency of the immersion liquid to overflow outward is gradually weakened from the position with the notch facing downward to the positions 90 degrees left and right (horizontal direction) in the circumferential direction at both sides, and then the winding slot 100b starts to support the immersion liquid when the notch faces upward, and the immersion liquid will lose the tendency of overflow. Therefore, it is preferable that the air supply region covers at least the outer surface of the armature in a range of 180 degrees or more, and the air supply region is symmetrical with respect to the position where the notch is directed toward the lower winding slot 100 b. It is preferably slightly greater than 180 degrees, since 180 degrees is exactly horizontal, and although ideally the immersion liquid will no longer flow downwards, it will in fact tend to flow outwards and will also be affected by centrifugal forces, and so the immersion liquid will still be able to overflow the winding slots 100b, and so an armature region with a supply gas region coverage of 180 degrees or more can be provided.

As shown in fig. 14, the gas seal portion 30 specifically includes a confluence chamber 31, a pressure accumulating member 32, and a pressure accumulating chamber 33 arranged in this order in the gas injection direction, with the pressure accumulating chamber 33 being closest to the winding slot 100 b. The gas seal portion 30 further includes a gas source for supplying gas to the collecting chamber 31, to be collected, to enter the fluid passages 32a of the pressure accumulating member 32, and to enter the pressure accumulating chamber 33, to supply gas under pressure to the corresponding winding slots 100 b.

The confluence chamber 31 is arranged at the outermost side of the air seal part 30, the cross section of the confluence chamber 31 is arc-shaped and is matched with the periphery of the armature, in order to better prevent the immersion liquid from overflowing, the central angle corresponding to the confluence chamber 31 is larger than 180 degrees, A, B, C, D, E, F, G is marked in sequence along the circumferential direction in the figure, wherein, the position D corresponds to the winding slot 100b and the slot wedge 300 with the downward slot opening, the position A is slightly higher than the radial horizontal line, and the confluence chamber 31, the pressure accumulating chamber 33 and the pressure accumulating element 32 are symmetrically arranged by the axis of the point D.

The present invention provides pressurized gas to at least the winding slots 100b corresponding to position D, and more particularly, in fig. 14, pressurized gas is provided to each of the corresponding winding slots 100b within the large semicircular range a-G. the pressure accumulating member 32 and the pressure accumulating chamber 33 are in a shape fitting with the bus bar chamber 31, and are also in an arc structure having a central angle greater than 180 degrees. the pressure accumulating chamber 33 is indicated by M, K, J, the positions corresponding to A, D, G. pressure accumulating chamber 33, pressure accumulating member 32, and bus bar chamber 31 of the bus bar chamber 31, the cross section is in an arc shape, the axial length is equal to the axial length of the ferromagnetic part 100, and the gas seal 30 corresponds to a "envelope" covering an area more than half of the armature circumference .

The manner of supplying the pressurized gas to the gas seal 30 will be described in detail below:

the pressure accumulating chamber 33 and the confluence chamber 31 are arc-shaped chambers, and the specific structure of the pressure accumulating element 32 therebetween can be understood by referring to fig. 20-1, fig. 20-1 is a schematic view of the pressure accumulating element 32 in fig. 14, fig. 20-2 is a schematic view of fluid passage 32a units in fig. 20-1, fig. 20-3 is a schematic top view of fig. 20-1, and is mainly used for illustrating the width L1 and the length L2 of the pressure accumulating element 32, the width L1 being substantially equal to the axial length of the electromagnetic component 100, and fig. 20-4 is a schematic left view of fig. 20-1, and is also mainly used for illustrating the side configuration of the pressure accumulating element 32.

The pressure accumulator element 32 has a plurality of fluid channels 32a which provide pressurized gas through the fluid channels 32a and then against the outer surfaces of the corresponding winding slots 100b, fig. 20-2 shows fluid channel 32a units extending axially (parallel to the axial direction of the ferromagnetic member 100) of the pressure accumulator element 32, the fluid channels 32a being schematic, the fluid channels 32a being variable cross-section channels, specifically convergent channels, i.e., the flow area is first tapered and then tapered, such fluid channels 32a achieving rapid speed increase capability and higher gas flow velocity.

In order to supply gas to the gas seal portion 30, a gas source is further provided, and the gas source supplies gas to the gas seal portion 30 through a main pipe 41 and branch pipes 42, as shown in fig. 14, the gas in the main pipe 41 flows to a plurality of branch pipes 42, the branch pipes 42 are connected to the periphery of the converging chamber 31 and communicated to the inside of the converging chamber 31, and the branch pipes 42 may be uniformly distributed in the converging chamber 31 along the circumferential direction, so as to improve the uniformity of the gas supply.

Each manifold 42 may be provided with a flow control valve 43 to control the flow of gas into the manifold chamber 31 to improve the controllable regulation. In addition, a controller 5 and a flow sensing transmitter 44 may be further provided, the flow sensing transmitter 44 is provided at the position of the air inlet 46 or the shunt tube 42, the detected flow signal is output to the controller 5, and the controller 5 controls the flow input according to the flow signal, such as controlling the opening degree of the flow control valve 43.

In addition, the plurality of fluid passages 32a may be designed to: the inlet of each fluid passage 32a is the same size, while the outlet of the fluid passage 32a at different circumferential positions in the circumferential direction is different in size to achieve the same inlet pressure, velocity and different outlet pressure, velocity. In this way, it is possible to supply gas of different pressures to the slit opening between the rim of the armature circumference and the ferromagnetic member 100 for the outer surface of the wedge 300 of the winding slot 100b at different positions in the circumference direction. As shown in fig. 14, the immersion liquid at the winding slot 100b corresponding to the position D in the circumferential direction is most likely to flow out, the outlet pressure of the corresponding fluid passage 32a may be the largest, while the immersion liquid at the winding slot 100b corresponding to the position A, G is not substantially flowed out, the outlet pressure of the corresponding fluid passage 32a may be the smallest, and the pressure of the fluid passage 32a between a-D, G-D gradually increases.

In fig. 20-2, there are shown fluid passages 32a, the fluid passages 32a extending in the axial direction, the air injection path extending in the radial direction of the pressure accumulating element 32, and the radial cross-section (in the radial direction of the pressure accumulating element 32) being in a convergent-divergent arrangement, and the flow-through cross-section (in the axial cross-section in the axial direction of the pressure accumulating element 32) being elongated, the principle structure can achieve the acceleration effect of according to the mechanical and thermodynamic principles of the convergent-divergent passages.

It will be appreciated that in fig. 20-1, the pressure accumulating member 32 includes a plurality of fluid passages 32a, each fluid passage 32a extends in the axial direction, the gas ejection path extends in the radial direction, and the plurality of fluid passages 32a are distributed in an arc shape matching the outer periphery of the armature. In practice, the purpose of preventing the outflow of the slot openings can be achieved by simply blowing air into the slot openings of the winding slots 100b, where a plurality of sets of arcuately arranged fluid passages 32a are provided, mainly so that the outlet of each fluid passage 32a is directed radially towards the ferromagnetic part 100 so as to be radially aligned with the respective slot opening of the winding slot 100b, to the maximum extent possible to use the energy of the blowing air to prevent the flooding of the impregnating liquid.

It will be appreciated that the winding slot 100B is angled counterclockwise or clockwise from the position directly below the slot (position D or K in figure 14) and the tendency for the immersion liquid to overflow at the gap between the winding slot 100B and the wedge 300 is progressively reduced-taking figure 14 as an example, the winding slot 100B is angled clockwise to position F or counterclockwise to position B slowly approaching horizontal at which point upward tangential force components may be provided to inhibit the already overflowing overflow liquid from continuing to flow downwardly along the surface while the radial force components continue to inhibit the immersion liquid from flowing out of the gap-it will be appreciated that from the position directly below the slot, in the clockwise and counterclockwise directions, the gas injection path of the flow passage 32a may not be directly radially but at an angle to the radial direction such that there is a tangential force component to the gas injection pressure and the tangential force component progressively increases-that is the gas supplied by the gas seal 30 may not be directly towards the slot 100B but rather generally radially to create a tangential gas pressure at to balance the immersion liquid flow.

Based on this, upon understanding fig. 14, reference may be made in combination to subsequent fig. 32, and in the present embodiment, the pressure accumulating element 32 includes a plurality of circumferentially arcuately arranged fluid passages 32a (the fluid passages 32a themselves extend in the axial direction), and the fluid passages 32a may also extend arcuately themselves, and the plurality of fluid passages 32a are axially arranged, so that the cross section illustrated in fig. 32 can be obtained. It will be appreciated that in figure 14 the individual fluid passages 32a extend axially and the wedge 300, the winding slot 100b and the gap therebetween extend correspondingly, it being seen that the axially extending fluid passages 32a may better correspond to the gap to prevent the immersion liquid from escaping.

In addition to the linear and long fluid passages 32a extending axially along the armature or extending arcuately around the circumference of the armature in a plane perpendicular to the direction of the armature axis to form an arcuately long shape, fig. 20-2 shows, for example, units of the fluid passages 32a extending axially, which may include a plurality of axially distributed small fluid passages 32a, a plurality of the small fluid passages 32a being arranged axially to form units of the fluid passages 32a, and a plurality of the units of the fluid passages 32a being arranged arcuately, and also being possible, in the pressure accumulating element 32, a plurality of criss-cross arrays of small fluid passages 32a are formed, which may have a circular flow cross section and are arranged in a convergent-divergent channel arrangement, and since the winding slots 100b are provided in the circumferential wall of the ferromagnetic member 100, the winding slots are open in a radial direction, and each fluid passage 32a also extends radially toward the center.

As described above, the gas supplied from the gas seal portion 30 is used to prevent the immersion liquid in the winding slots 100b from overflowing, so that it is necessary to supply a gas with constant pressure, and the speed and pressure increase through the fluid channels 32a can ensure that the plurality of winding slots 100b can be supplied with gas in a targeted manner, and in fig. 14, the fluid channels 32a are distributed along the circumferential direction and the gas nozzles are arranged in the radial direction, and in addition, the pressure demand on the gas supply pressure of the gas source can be reduced due to the speed and pressure increase effect of the fluid channels 32a, and the cost can be reduced.

In this regard, the fluid passages 32a may be of various forms, as can be understood with reference to FIGS. 21-1-22-2, with FIG. 21-1 being a schematic view of another pressure accumulating elements 32', FIG. 21-2 being a schematic view of fluid passages 32a' in FIG. 21-1, FIG. 22-1 being a schematic view of another pressure accumulating elements 32 ", and FIG. 22-2 being a schematic view of fluid passages 32 a" in FIG. 22-1.

In fig. 21-1, the flow passage 32a 'of the pressure accumulating element 32' is tapered in flow cross-sectional area in the air blowing direction; in fig. 22-1, the flow cross-sectional area of the fluid passage 32a "is tapered in the air blowing direction. It will be appreciated that the tapering of the jet direction has the effect of increasing the velocity, and the tapering of the jet direction has the effect of increasing the pressure. When the air supply pressure is higher, a tapered scheme can be adopted to improve the flow rate; when the air supply pressure is lower, a divergent scheme can be adopted to increase the pressure. The appropriate fluid channel height setting scheme can be selected according to the actual gas supply requirement.

with continued reference to fig. 14, a channel extending along the axial direction of the pressure accumulating member 32 is formed between two adjacent fluid channels 32a, and this channel can be used as a heating channel 32b, because the heating channel 32b can heat the gas in the fluid channel 32a and then perform a pressurization function, and can also increase the temperature of the gas sprayed to the winding slot 100b, thereby facilitating the heat exchange rate enhancement, baking, and energy saving for curing the liquid insulating varnish.

The heating channel 32b may be heated by disposing an electric heating film on the inner wall of the heating channel 32b, and heating the gas in the adjacent fluid channel 32a by electric heating.

The heating mode can also be understood by referring to fig. 23 in combination with fig. 14, fig. 23 is a schematic diagram of the combustible gas supplied to the heating channel 32b, in the figure, only heating channels 32b are shown in a dotted line (a plurality of channel sections are also shown in the channel), and it can be understood that a plurality of heating channels 32b and fluid channels 32a are arranged in a staggered mode along the arc circumferential direction.

As shown in fig. 14, in the process of baking and curing the armature and the impregnating liquid insulating varnish thereof, volatile gas is generated due to heating of the impregnating liquid, also carries toxic or other polluting components, so that the adsorption tower 1 is arranged to adsorb the volatile gas, the volatile gas can be separated out after passing through the adsorption tower 1, the combustible gas can be introduced into the heating channel 32b, the combustible gas can be combusted in the heating channel 32b, and the gas in the adjacent fluid channel 32a unit can be heated.

As shown in fig. 14, after the combustible gas in the adsorption tower 1 is separated, the rest of the gas can be used as a gas source, and enters the main pipe 41 after being pressurized by the compressor 3, and then flows to the converging chamber 31 through the shunt pipe 42, so that the volatile gas generated during baking in the baking device is fully utilized, and the purpose of energy saving and self circulation is achieved. Before the gas in the adsorption tower 1 flows to the gas compressor 3, the gas can be detected by a combustible gas measurement analyzer d to analyze whether the combustible gas is thoroughly separated or not, so that the combustible gas is fully separated, and meanwhile, the safe delivery of the gas is also ensured.

In fig. 14, the remaining gases except the combustible gas are separated into water vapor by the separator 2, the water vapor can release heat by a heat exchanger (for example, a dividing wall type heat exchanger 6 shown in fig. 14 and 23) to heat fresh air, the fresh air can enter the compressor 3 together with the gas separated by the separator 2 to form a sufficient air source, and the additional fresh air can enter after being filtered by the air filter 7 to reduce impurities.

The heater 4 can be arranged at the downstream of the compressor 3, the air is heated for steps to reach the required pressure and temperature and then enters the confluence cavity 31, the outlet of the heater 4 can be provided with a temperature sensor b and a flow sensor a to detect the temperature signal and the flow signal of the air, the outlet of the compressor 3 can be provided with a pressure sensor c to detect the temperature signal of the air, the baking device can also be provided with a controller 5, the obtained temperature and pressure signals can be transmitted to the controller 5, the controller 5 respectively controls the operation of the heater 4 and the compressor 3 according to the detected temperature and pressure, and as mentioned above, the controller 5 also controls the flow of the air entering the air seal part 30 according to the flow signal.

Referring to fig. 14, the rotary roasting apparatus provided in this embodiment further includes a gas recycling chamber 10, the gas recycling chamber 10 is at least abutted to the pressure accumulating chamber 33 to form an annular chamber, the gas recycling chamber 10 is provided with an external gas recycling port 47, the gas recycling port 47 may be an small port, or a long port extending along the axial direction of the gas recycling chamber 10.

As can be seen from the above description of the operation process, the gas seal portion 30 injects gas to the winding slot 100b, the discharged gas flow needs to flow out, the gas recovery chamber 10 provided in this embodiment is butted with the pressure storage chamber 33 to form a ring chamber, so that the whole armature is practically almost placed in the ring chamber, and the gas generated during baking and the gas discharged from the gas seal portion 30 to prevent the immersion liquid from flowing out can be all in the ring chamber, so that the gas can be integrally recovered, and can be all recovered in the adsorption tower 1 for recycling. It is to be understood that the gas recovery chamber 10 may not be provided, and the recovery ports may be provided at both axial ends of the pressure accumulation chamber 33, or the gas may be recovered.

, as shown in FIG. 14, a partition 60 is further provided, the partition 60 separates the gas recovery chamber 10 from the pressure accumulating element 32 and the pressure accumulating chamber 33, the partition 60 and the slot periphery wall of the slot in which the linear segment portion of the winding 200 is located (in this embodiment, the ferromagnetic member 100 and the peripheral wall of the wedge 300) leave a predetermined gap, so that the gas in the pressure accumulating chamber 33 can flow to the gas recovery chamber 10 only through the predetermined gap, by providing the partition 60, the predetermined gap is easily formed, and the predetermined gap has a size that aims to establish the pressure of the pressure accumulating chamber 33, so as to ensure that the gas jet prevents the immersion liquid from overflowing, and prevent the gas from rapidly flowing back to the adsorption tower 1 from the gas recovery chamber 10. as shown in FIG. 14, the partition 60 crosses the pressure accumulating element 32 at P, Q point in the radial direction, and has a gap of with the periphery of the ferromagnetic member 100.

In order to achieve the curing of the baking and impregnating liquid insulating varnish, a baking source 20 is further provided, the baking source 20 in the present embodiment is provided in the gas recovery chamber 10, as shown in fig. 14, the baking source 20 is also arranged in an arc shape, the gas recovery chamber 10 is abutted with the pressure accumulating element 32 to form an annular chamber, so that the space between the gas recovery chamber 10 and the outer radial surface of the armature is enlarged, and a sufficient space is provided for the provision of the baking source 20, the baking source 20 is provided here, the space can be fully utilized, and the structure of the entire rotary baking apparatus is more compact, as shown in fig. 14, the gas recovery chamber 10 extends in the G-H-a circumferential direction, the baking source 20 extends in the Q-N-P circumferential direction, and the baking source 20 is abutted with the inner circumference of the pressure accumulating element 32, of course, it is also possible that the gas recovery chamber 10 is only abutted with the pressure accumulating chamber 33, because the gas of the gas accumulating portion 30 finally flows to the pressure chamber 33, here, the gas accumulating pressure chamber 33 is open 6324 side toward the ferromagnetic component 100b, the winding groove 100b, the gas collecting chamber 32, the gas collecting chamber 20 is also open , and 3652 is open toward the baking source 20.

As shown in FIGS. 24-27, FIG. 24 is a schematic view of the baking source 20 of FIG. 14 positioned above the windings of the motor; fig. 25 is a bottom view of the armature of fig. 24, showing laminated ferromagnetic laminations 100a (e.g., silicon steel sheets); fig. 26 is a schematic diagram of electromagnetic eddy currents induced in a single piece of ferromagnetic laminations 100 a; FIG. 27 is a top view of the baking source 20; FIG. 28 is a schematic diagram of the position of the baking source 20 in a top view with the baffle 60; fig. 29 is a schematic top view of the gas seal portion 30, schematically showing the manifold chamber 31, the pressure accumulator element 32, and the pressure accumulator chamber 33, without showing details.

The source 20 in this embodiment comprises a base body in the form of an arc of a strip as shown in figure 24, also in the form of a generally semi-cylindrical shape, covering the upper region of the armature, it being understood that the source 20 may be located elsewhere on the radial periphery of the motor winding. The base body is provided with a plurality of groups of electromagnetic induction coils 203 and/or a plurality of groups of far infrared emitting devices 204.

Alternating current is supplied to the electromagnetic induction coils 203, the induction heating power supply 206 shown in fig. 27 is an alternating power supply, and the plurality of groups of electromagnetic induction coils 203 are all connected to the bus 205 to connect the alternating power supply. Thus, the electromagnetic induction coil 203 generates an alternating magnetic field that passes through the ferromagnetic laminations 100a of the underlying ferromagnetic part 100, which in turn generates electromagnetically induced eddy currents at the corresponding ferromagnetic laminations 100a, as shown in fig. 26, which shows the generation of induced eddy currents in the individual ferromagnetic laminations 100a that generate joule heat, which in turn heats the ferromagnetic part 100. The induced eddy currents also create a skin effect on the outer surface of the ferromagnetic laminations 100a, which heats up more quickly, thereby better guiding the immersion liquid to contact the outer surface of the ferromagnetic part 100 for immersion, reducing the contact angle of the immersion liquid with the core, and facilitating wetting.

In order to prevent the electromagnetic induction coils 203 of the respective groups from interfering with each other, a magnetic shielding boundary 201 may be provided around the base, and a magnetic shield 202 may be provided between the electromagnetic induction coils 203 of adjacent groups.

The far infrared transmitters 204 may be provided in the electromagnetic induction coils 203 as shown in fig. 27, thus being divided into several groups of electromagnetic induction coils 203 and far infrared transmitters 204. The mechanism of heating the ferromagnetic member 100 by the far infrared emitter 204 is different from that of electromagnetic induction heating, and the far infrared emitter 204 emits electromagnetic waves to the outer surface of the ferromagnetic member 100, and for the liquid insulating varnish, an electromagnetic wave band (frequency or wavelength) having high penetrability to the insulating varnish and high absorptivity to the ferromagnetic member 100 is selected. The plurality of groups of electromagnetic induction coils 203 and the far infrared emitting devices 204 which are distributed uniformly can ensure the uniformity of heating. Several groups of electromagnetic induction coils 203 and far infrared emitting devices 204 can be uniformly distributed along the circumferential direction of the base body.

The baking source 20 may be configured to be permeable to gas (but not permeable to electromagnetic waves, so as to avoid heating the gas recovery device in the radial and reverse directions of electromagnetic waves) so that gas can pass through the baking source 20. As previously described, the torrefaction source 20 is disposed within the gas recovery chamber 10. As will be appreciated in conjunction with FIG. 14, the permeable torrefaction source 20 facilitates the flow of gas within the gas recovery chamber 10 and the smooth recovery thereof.

With continued reference to fig. 30-32, fig. 30 is an axial cross-sectional view of the motor winding of fig. 14; FIG. 31 is a schematic view of the lower annular shroud 50 of FIG. 30 at a left angle; fig. 32 is an enlarged view of a portion a in fig. 30.

As described above, the air sealing portion 30 mainly injects air radially toward the slot opening of the winding slot 100b to prevent the immersion liquid from overflowing, and , since the winding slot 100b is a through slot and both ends thereof are ports, the present embodiment also performs a sealing treatment on both end ports of the winding slot 100b, as shown in fig. 30, when the winding 200 is placed in the winding slot 100b, the winding end 201 protruding from both ends of the winding slot 100b is formed, the winding 200 is wound turns along the circumferential direction of the ferromagnetic member 100, a plurality of winding ends 201 are formed at both ends of the ferromagnetic member 100, and a plurality of winding ends 201 per end are annularly distributed, and accordingly, the rotary baking apparatus further includes the annular cover 50 fixed to the armature, and the annular cover 50 covers the plurality of winding ends 201 annularly distributed to the port position of the winding slot 100 b.

Since the annular shroud 50 is fixed to the armature, the annular shroud 50 will rotate with the armature during baking, at which point the gas slip ring 45 may be provided. As shown in fig. 33 and 34, fig. 33 is a schematic view of the gas slip ring 45 of fig. 30; fig. 34 is a right side view of fig. 33.

The air source can specifically supply air to the annular cover 50 through the air slip ring 45, so that when the annular cover 50 rotates along with the armature, the air slip ring 45 can supply air to the annular cover 50 without rotating interference, and the problems of pipeline winding and the like are avoided.

To ensure that the immersion liquid is prevented from escaping in the axial direction at step , the annular cover 50 is a sealing cap at the end of the ferromagnetic part 100. with continued reference to fig. 32, the present embodiment defines that the ferromagnetic part 100 is provided with the circumferential wall of the winding slot 100b as the slot circumferential wall, which is actually the outer circumferential wall of the armature ferromagnetic part 100 since the ferromagnetic part 100 of the present embodiment is the inner stator, the annular cover 50 is sealed to the slot circumferential wall corresponding to the annular side wall of the slot circumferential wall (which should be the outer side wall 501 of the annular cover 50 accordingly), and since the immersion liquid is required at the slot circumferential wall, a release cloth is further provided between the slot circumferential wall and the annular cover 50 so that after baking is completed, the annular cover 50 is removed without affecting the insulation layer formed at the slot circumferential wall after baking, the other side wall (i.e., the inner side wall) of the annular cover 50 can be directly fixed and sealed to the frame 101 in the middle of.

The sealing between the annular cover 50 and the slot perimeter wall may be accomplished by means of a gas seal, as shown in fig. 32, the annular side wall of the annular cover 50 corresponding to the slot perimeter wall may be provided as a hollow side wall, and the end of the hollow side wall near the winding slot 100b is provided with a gas outlet ring 501a, the gas outlet ring 501a being provided with a gas outlet from the side of the ferromagnetic part 100 towards the port location of the winding slot 100b, the gas source also supplying gas to the hollow side wall so that the gas can be discharged through the gas outlet, although there is a radial gap between the hollow side wall and the slot perimeter wall as well as between the gas outlet ring 501a and the slot perimeter wall, the gas outlet ring 501a jets gas from the side towards the slot perimeter wall of the ferromagnetic part 100, preventing the gas in the annular cover 50 from escaping from the gap, performing a blocking together with the annular cover 50 gas, preventing the immersion liquid at the end of the winding slot 100b from escaping in the axial and radial directions, and not affecting the formation of the cured insulating layer.

The air outlet ring 501a may be disposed on the hollow sidewall in bodies or in separate bodies, and in fig. 34, the air outlet ring 501a is a single member and is disposed on the hollow sidewall in separate bodies, it is understood that it is also feasible to directly machine the air outlet at the end of the hollow sidewall close to the winding slot 100b, which is equivalent to disposing the air outlet ring 501a on the hollow sidewall, and of course, disposing the air outlet ring 501a separately is convenient for machining and selecting the abrasion-resistant material different from the outer sidewall 501.

Referring to fig. 32, the gas seal portion 30 has an end plate 301, the gas seal portion 30 described in the above embodiment includes a pressure storage cavity 33, a pressure storage element 32 and a flow converging cavity 31, and the end plate 301 is an end plate (specifically, an arc belt or a sector) for sealing the pressure storage cavity 33, the pressure storage element 32 and the flow converging cavity 31 to ensure that the gas is injected into the winding slot 100b in each cavity. The armature is in a rotating state during the baking process, and the gas seal 30 is relatively stationary, in this case, in order to avoid the friction interference between the end plate 301 and the slot peripheral wall of the ferromagnetic member 100, the end plate 301 and the slot peripheral wall may be sealed by gas.

As shown in fig. 32, the end plate 301 is disposed close to the peripheral wall of the winding slot 100b (specifically, the inner peripheral wall of the end plate 301 in the present embodiment) toward the gas outlet ring 501a, and the gas outlet ring 501a is further provided with gas outlets toward the peripheral wall, as can be seen from the arrows shown in fig. 32, gas is simultaneously blown to both sides in the gas outlet ring 501a, the gas blown to the side prevents the gas in the annular cover 50 from escaping, and the gas blown to the side prevents the gas in the pressure accumulating chamber 33, the pressure accumulating member 32, and the joining chamber 31 from escaping in the axial direction.

To enhance sealing, the peripheral wall of the end plate 301 adjacent to the winding slot 100b may also be provided with sealing teeth 301a, which sealing teeth 301a may extend the flow path of the gas, providing resistance to gas escaping from the gas seal 30.

Further , a contact sensor 70 may be disposed between the end plate 301 and the air outlet ring 501a to detect whether the distance between the two is within a predetermined minimum range, so as to avoid excessive friction generated during the rotary baking process due to contact between the end plate 301 and the air outlet ring 501a caused by installation error.

In the above embodiment, the armature is described by taking the inner stator and the outer rotor of the motor as an example, the winding slot 100b is disposed on the outer periphery of the stator ferromagnetic component 100, and actually, the winding slot 100b is disposed on the inner periphery of the ferromagnetic component 100 and is used as the outer stator, and in this case, the air seal 30 and other components in the above embodiment may be applied, and the direction and position may be adjusted adaptively.

Referring to fig. 35-37, fig. 35 is a schematic structural view of another embodiment of the armature of the present invention, fig. 36 is a schematic structural view of another embodiment of the rotary baking apparatus of the armature of the present invention, and fig. 37 is a schematic view of the air jet of fig. 35 for preventing the immersion liquid from overflowing.

As shown in fig. 35, the ferromagnetic component 100 is provided with the winding slot 100b around which the winding 200 is wound, so that when the winding slot 100b rotates upwards during rotation, the notch of the winding slot 100b faces downwards, and the immersion liquid is prone to overflow. As shown in fig. 35, unlike the above-described embodiment, the gas seal 30 is not provided outside the bottom of the ferromagnetic member 100, but is provided in the space in the middle of the ferromagnetic member 100. At this time, the converging chamber 31, the pressure accumulating element 32, and the pressure accumulating chamber 33 are arranged in this order in the air blowing direction, and the air is blown toward the inner peripheral wall surface 100c of the ferromagnetic member 100, and the winding groove 100b is provided in the inner peripheral wall surface 100 c. Thus, unlike the previous embodiment, the air jet direction in the embodiment of fig. 14 is radially inward, whereas the air jet direction in this embodiment is radially outward due to the reverse orientation. However, the principle of the air injection for inhibiting the overflow of the impregnating liquid is the same and is not described in detail here.

Accordingly, when the annular cover 50 is provided to seal the annular cover 50 and the peripheral wall of the notch of the ferromagnetic member 100 and seal the annular end plate 301 of the gas seal portion 30 and the peripheral wall of the notch of the ferromagnetic member 100, the directions of arrangement are opposite to each other. At this time, the notch peripheral wall is the inner peripheral wall of the ferromagnetic member 100, the annular side wall of the annular cover 50 corresponding to the notch peripheral wall is the inner side wall thereof, and the annular peripheral wall of the annular end plate 301 corresponding to the notch peripheral wall is the outer peripheral wall thereof. The structures of the gas outlet ring 501a, the seal teeth 301a and the like are the same, and are not described in detail.

Furthermore, the gas recovery chamber 10 may still be provided in the manner of the above-described embodiments. Of course, the placement of the torrefaction source 20 may be different, i.e. the torrefaction source 20 may not be placed in the gas recovery chamber 10, but still be housed above the armature.

It can be seen that the present embodiment also details how to prevent the winding slot 100b and the slot wedge 300 from flooding with immersion liquid at the gap at the port location.

In summary, on the basis of the traditional ferromagnetic boundary structure of the armature, a sealing protection system is constructed between the ferromagnetic boundary 100aL and the slot wedge 300 and between the first two and the exposed air connection area of the slot wedge side of the slot bottom insulation 200f in the traditional rotary baking process to overcome the multiple combined action of gravity and centrifugal force on the insulation paint, and a new method is developed, and the traditional ferromagnetic boundary new structure of the motor winding has the double functions of preventing radial loss and axial loss of times of the insulation paint after vacuum pressure paint dipping by means of the variable cross-section channel theory of engineering hydrodynamics of engineering thermophysics.

Referring to fig. 38-40, fig. 38 is a schematic view of the vision system monitoring the gas-liquid interface formed by the immersion liquid and the peripheral gas around the gap opening between the ferromagnetic part 100 and the slot wedge 300 at different positions of the armature in the embodiment of the present invention, fig. 39 is a schematic block diagram of the vision system in fig. 38, and fig. 40 is an image of fig. 38 at three different times in the 4.5 point (4 point and half) direction.

The vision system comprises an optical imaging device 80, wherein the optical imaging device 80 comprises an illumination system (a light source 801 as shown in the figure), a vision sensor 802, an image acquisition card, a camera controller 5, a computer system and a light source controller, wherein the computer system comprises an I/O interface, a host, a display, image processing software and a communication interface, and all components and working principles of the optical imaging device 80 are in the prior art.

The machine vision system of the gas-liquid interface captures an image through the vision sensor 802, then transmits the image to the processing unit, and judges the size, shape and color according to the information such as pixel distribution, brightness, color and the like through digital processing, and then controls the action of the field equipment according to the judgment result.

A position sensor may be provided, and when the gap between the winding slot 100b and the slot wedge 300 of the ferromagnetic component 100 enters the monitoring range of the vision system, the position sensor senses the information and provides trigger signals, so that the computer starts the vision system, controls the light source 801, collects the image of the surface at or near the gap of the ferromagnetic component 100 through the CCD/CMOS image sensor and the image collection card, and then the image processing software executes the program, processes the collected image data, and sends the processing result to the database server.

The visual sensor 802 is a device that converts the optical signal of the gas-liquid interface at the gap into an electrical signal, and directly captures the gas-liquid interface on the wall surface of the ferromagnetic component 100 or the gas-liquid interface around the gap, that is, converts the optical image received by the visual sensor 802 into an electrical signal that can be processed by a computer. By processing the image signal obtained by the vision sensor 802, the characteristic quantity of the object to be measured (gas-liquid interface or gas-liquid interface around the slit opening), for example, the shape of the immersion liquid overflow, the position of the flow front, and the like are obtained, and the change tendency of the immersion liquid overflow shape and the change trace of the position of the flow front are obtained.

The vision sensor 802 has the function of capturing thousands of pixels (pixels) from the entire image, the sharpness and fineness of the image is usually measured in terms of resolution, expressed in terms of number of pixels, the vision sensor 802 can preset a reference image (the shape of the immersion liquid overflow) that the vision sensor 802 compares to the reference image stored in memory after capturing the image to make an analysis and judgment.

The image acquisition card is an important component of a machine vision system of a gas-liquid interface, and has the main functions of acquiring video data output by a camera in real time and providing a high-speed interface with a PC (personal computer). The image acquisition card of the machine vision system of the gas-liquid interface mainly completes the digitization process of an analog video signal, the video signal is filtered by a low-pass filter and converted into a continuous analog signal in time, the video signal is sampled at intervals in time by a sampling/holding circuit according to the requirement of an application system on the image resolution ratio to convert the video signal into a discrete analog signal, and then the discrete analog signal is converted into a digital signal by an A/D (analog to digital) converter to be output.

As described above, the optical imaging device 80 is used to obtain image information of the gas-liquid interface at the winding slot 100b or the gas-liquid interface around the slot, and since the immersion liquid in the winding slot 100b with the notch facing downward overflows more obviously, which is representative of , it is better to monitor the position of the winding slot 100b with the notch facing downward, as shown in fig. 36, the group optical imaging device 80 is disposed at the position of the end plate 301 of the air seal 30.

In fig. 38, image information of the gas-liquid interface around the gap between the winding slot 100b and the wedge 300 at three positions is specifically acquired. Fig. 38 shows position information in clock point numbers, that is, six positions of 12 points (directly above, winding slot 100b is upward), 3 points, 4.5 points (i.e., 4 and a half), 6 points (directly below, winding slot 100b is downward), and 9 points, and image information of the winding slot 100b at three positions of 4.5 points, 6 points, and 7.5 (i.e., 7 and a half) points is monitored. From the image information, the state of the gas-liquid interface around the gap between the winding slot 100b and the slot wedge 300 can be obtained, that is, the characteristic quantity of the immersion liquid at the position, such as the overflow shape of the immersion liquid, the position of the flow front, and the like, can be analyzed, and the change trend of the overflow shape of the immersion liquid and the position change trace of the flow front can be obtained.

The maximum cross section of the overflowing liquid Q above the surface of the root in the axial direction, the area of the gas-liquid interface (i.e., the contact surface of the immersion liquid with the gas flow), and the area change tendency are mainly analyzed in the acquired image information by taking the armature peripheral wall at the winding slot 100b and the slot wedge 300 as the root.

As shown in fig. 38, three sets of crescent structures are respectively shown on the outer sides of the three monitored positions, namely, images of overflowing liquid Q reflected in the captured image information, wherein the crescent structures are marked with (1), (2) and (3) to represent thickness variation images of overflowing immersion liquid obtained according to time sequence, wherein (1) is the image information captured first, and (2) and (3) are obtained sequentially, it can be seen that the overflowing amount of immersion liquid gradually increases with the passage of time under the condition that the air seal part 30 is not interfered or the acting force of air pressure on the slit opening is not enough to prevent overflowing, and it can also be understood with reference to fig. 40, in which fig. 40 is an image of the air-liquid interface at the winding slot 100b captured at different times at the same position, the arrow direction is a time trend, and the left side is the latest image.

The rotary roasting device further comprises a controller 5, wherein the vision system outputs image information to the controller 5, the unanalyzed image information can be directly sent to the controller 5 and analyzed by the controller 5, or the image information can be fed back to the controller 5 after the computer system of the vision system analyzes, the controller 5 controls the rotary roasting according to the image information, specifically, the rotary driver e is controlled to control the rotation speed of the armature, the air supply pressure and the air supply temperature of the air seal part 30, and the adjustment of the air supply temperature can influence the roasting effect, because the air supply temperature can adjust the viscosity of the dipping liquid in the rotary roasting process.

From the above analysis, it can be seen that the degree of overflow of the immersion liquid during rotation due to the addition of the gas seal 30 is affected by the viscosity of the immersion liquid, the speed of rotation, and the pressure of the gas provided by the gas seal 30.

In fig. 38, the optical imaging device 80 acquires image information of other different positions in the circumferential direction in addition to the position (position of 6 point) of the winding slot 100b facing downward, and mainly selects image information of the gas-liquid interface at the gap between the winding slot 100b and the slot wedge 300 at several typical positions (3 point, 4.5 point, 7.5 point, 9 point).

For example, according to the analysis of the image information, when the maximum cross section of the overflowing liquid Q at the root surface in the axial direction and the gas-liquid interface area continue to increase, the controller 5 controls to increase the supply air pressure and increase the armature rotation speed (mainly used at the initial stage of solidification of the immersion liquid) until the maximum cross section and the gas-liquid interface area do not increase any more above the root surface in the axial direction.

The supply air pressure may be the pressure in the accumulator chamber 33, and a pressure sensor may be provided in the accumulator chamber 33 to detect the pressure. When the air supply pressure is adjusted, the pressure sensor and the flow sensor transmitter 44 perform measurement feedback and real-time tracking.

Specifically, sets of the optical imaging devices 80, such as the plurality of vision sensors 802 shown in fig. 38, may be respectively disposed at different positions to correspondingly acquire image information of the gap between the winding slot 100b and the slot wedge 300 at the corresponding positions, of course, only sets of the optical imaging devices 80 may be disposed to acquire image information of the gap including a plurality of circumferentially different positions, and at this time, a plurality of sets of photographing and time selection are required to track the image information of the winding slot 100b and the slot wedge 300 at different positions or different times.

The visual system can track and shoot image information of a gap between the winding slot 100b and the slot wedge 300, and can also acquire image information of the peripheral wall corresponding to a climbing section of the armature in the rotation process so as to acquire leveling and sagging image information of the climbing section. Here, the climbing section refers to a section in which the impregnating liquid in the winding slot 100b of the armature has a tendency to overflow and the overflow tendency is opposite to the rotation tendency. Taking fig. 38 as an example, when the armature rotates clockwise, the segment from 6 point to 7.5 point to 9 point is the ramp segment; conversely, if the rotation is anticlockwise, the section from 3 points to 4.5 points to 6 points is the climbing section.

The phenomenon of leveling and sagging, namely, after the armature is subjected to an impregnation process, the impregnation liquid on the outer surface of the armature naturally flows, and in a climbing section, "ripples", namely, the phenomenon of sagging, can appear due to different natural flow speeds and the like at various positions, while fluid flows based on surface tension, and the sagging disappears, so that the flat and non-ripple state, namely, the phenomenon of leveling is achieved, and the ultimate purpose of the impregnated armature is to level and eliminate the sagging. The visual system according to this embodiment further acquires image information of the peripheral wall of the armature where the winding slot 100b is provided, specifically, fig. 38 acquires image information of the outer peripheral wall, and acquires image information of the inner peripheral wall if the winding slot 100b is provided on the inner peripheral wall.

The controller 5 controls the gas supply pressure, gas temperature, and armature rotation speed so that the immersion liquid sagging speed of the peripheral wall of the armature gradually decreases (reflected in the image information) until leveling.

In the control process, it is possible to:

th correspondence between the sagging speed of the immersion liquid in climbing slope units and the viscosity of the immersion liquid, the thickness of the immersion liquid coating (thickness of the immersion liquid higher than the above-mentioned root), the density of the immersion liquid is obtained from the image information at a specific supply air pressure, gas temperature, rotation speed of the armature.

When the controller 5 is controlling, it may further continue to control the combined change of the air supply pressure, the air temperature, and the rotation speed of the armature, and according to the obtained image information, obtain:

the reduction of the hanging speed of the immersion liquid in the range of the climbing section is in a second corresponding relation with the supplied air pressure, the air temperature, the rotating speed of the armature and the viscosity of the immersion liquid; and/or:

a third correspondence between a final thickness of the coating of impregnating liquid and a viscosity of the impregnating liquid, a pressure of the supply gas, a temperature of the gas, a rotational speed of the armature.

At least of the th correspondence, the second correspondence and the third correspondence can be prestored in the controller 5, so that the rotary baking of the armature is controlled according to the prestored correspondences, namely, after the three correspondences are obtained through a plurality of tests, the optimal correspondences can be established into a mathematical model to be embedded into the controller 5 to be executed as a control rule, so that the rotary baking of the armature under different occasion environments is directly controlled, and thus, the independent test verification of the rotary baking of the armature in each occasions is not needed, the time is saved, the production efficiency is improved, and the production quality of the motor is ensured.

It should be noted that the above embodiment describes that the air seal 30 is mainly used for injecting air to the gap opening between the slot wedges 300 of the winding slot 100b of the ferromagnetic component 100 when injecting air, it is understood that the ferromagnetic component 100 is not provided with slot wedges such as a squirrel cage motor, and the air injection is directly performed to the winding slot when injecting air, and the winding slot may be a slot with slots or a through hole slot structure, and only has two end ports, and the winding is directly inserted through, for example, the winding may be a copper bar, and in this structure, the gap opening is a gap opening between the slot wall of the winding slot and the winding because the winding slot is provided with only a winding and is not embedded in the slot wedges, and it is contemplated by this embodiment that the air injection is performed to provide a force against gravity to prevent the liquid from flowing out of the gap opening, to ensure the impregnated liquid to remain in the gap opening, and to increase the impregnation rate, so that in fact, in addition to the ferromagnetic component 100b and its surroundings, there may be a gap opening between adjacent lamination sheets 100a of the air seal.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that it is obvious to those skilled in the art that various modifications and improvements can be made without departing from the principle of the present invention, and these modifications and improvements should also be considered as the protection scope of the present invention.

Claims

pressure accumulator for armature liquid insulation rotary baking solidification, the armature includes a winding (200) and a ferromagnetic component (100), the ferromagnetic component (100) is provided with a plurality of winding slots (100b) distributed along its circumference to embed the winding (200), characterized in that, the pressure accumulator includes a pressure accumulating element (32, 32', 32 "), the pressure accumulating element (32, 32', 32") has a plurality of fluid channels (32a, 32a ', 32a "), gas can be injected to the slit mouth of the armature surface through the fluid channels (32a, 32a', 32 a");

the armature further comprises a slot wedge (300) for sealing the slot opening of the winding slot (100b), the slot opening comprising a slot opening between a slot wall of the winding slot (100b) and the slot wedge (300); or only the winding (200) is embedded in the winding slot, and the gap opening comprises a gap opening between the slot wall of the winding slot (100b) and the winding (200);

the pressure accumulating element (32, 32') is in the shape of an arc with a central angle greater than or equal to 180 DEG, and is matched with the peripheral wall of the ferromagnetic component (100) provided with the winding slot (100b) so that the air supply area of the pressure accumulating element at least covers the winding slot (100b) within 180 DEG of the armature.
2. The armature liquid insulation rotary bake solidification pressure accumulator according to claim 1, wherein said ferromagnetic pieces (100) are formed by stacking ferromagnetic laminations (100a), and said slot openings comprise slot openings between adjacent said ferromagnetic laminations (100 a).
3. An armature liquid insulating rotary baking solidification accumulator according to claim 1, characterized in that the gas injection paths of a plurality of said fluid passages (32a, 32a ', 32a ") extend in the radial direction of said accumulator element (32, 32', 32").
4. An accumulator device for armature liquid insulation rotary baking solidification according to claim 1, characterized in that the air injection path of the fluid passage (32a, 32a ', 32a ") located in the middle of the accumulator element (32, 32', 32") extends in the radial direction of the accumulator element (32, 32', 32 "), and the air injection path of the other fluid passage (32a, 32a ', 32 a") is angled from the radial direction in the clockwise and counterclockwise directions from the fluid passage (32a, 32a ', 32a ") so that there is a tangential component and a gradual increase in the air injection pressure.
5. The armature liquid insulation rotary baking solidification accumulator according to claim 1, wherein the fluid channel (32a, 32a ', 32a ") is a convergent-divergent channel, or the fluid channel (32a, 32a', 32 a") is tapered in a gas injection direction.
6. The pressure accumulating device for armature liquid insulation rotary baking solidification according to claim 1, further comprising a converging chamber (31) and a pressure accumulating chamber (33), wherein the converging chamber (31), the pressure accumulating members (32, 32', 32 "), and the pressure accumulating chamber (33) are sequentially arranged along a gas injection direction, and the gas is converged into the converging chamber (31), then respectively enters the fluid passages (32a, 32a ', 32 a") of each pressure accumulating member (32, 32', 32 ") and enters the pressure accumulating chamber (33), and gas with constant pressure is provided to the notch direction of the corresponding winding slot (300).
7. An armature liquid insulation rotary baking solidification pressure accumulating device according to claim 6, further comprising a main pipe (41) and a shunt pipe (42), wherein the gas enters the confluence chamber (31) through the main pipe (41) and the shunt pipe (42), and the shunt pipe (42) is communicated with and uniformly distributed in the confluence chamber (31);

and each shunt pipe (42) is provided with a flow control valve (43) and/or a flow sensing transmitter (44) for monitoring the shunt pipe (42) entering the confluence cavity (31).
8. An armature liquid insulation rotary baking solidification accumulator according to claim 1 characterized in that the accumulator element (32, 32', 32 ") is further provided with a heating channel (32b, 32b', 32 b").
9. The armature liquid insulation rotary baking solidification pressure accumulating apparatus according to claim 8, wherein the inner wall of the heating channel (32b, 32b', 32b ") is provided with an electric heating film, or,

the heating channel (32b, 32 b') is a gas channel, and combustible gas generated when the armature is baked is introduced into the gas channel.
10. An armature liquid insulating rotary baking solidification accumulator according to claim 9 in which each of said fluid passages (32a, 32a ', 32a ") extends linearly in the axial direction of said accumulator member (32, 32', 32") and the air injection path extends generally in the radial direction of said accumulator member (32, 32', 32 "); and, several of said fluid channels (32a, 32 a') are distributed arcuately.
11. An armature liquid insulating rotary baking solidification accumulator according to claim 10, characterized in that the inlet size of each of said fluid passages (32a, 32a ', 32a ") is the same and the outlet size is different to obtain the same inlet pressure and different outlet pressures, the outlet pressure of said fluid passages (32a, 32a ', 32 a") decreasing gradually from the center of said accumulator element (32, 32', 32 ") in the clockwise and counterclockwise direction.
12. An armature liquid insulating rotary baking solidification accumulator according to claim 9 in which each of said fluid passages (32a, 32a ', 32a ") extends along a circumferential arc of said accumulator member (32, 32', 32") and the air blast path extends generally radially of said accumulator member (32, 32', 32 "); and several of said fluid channels (32a, 32a ', 32a ") are axially distributed along said pressure accumulating element (32, 32', 32").
13. An armature liquid insulation rotary baking solidification pressure accumulator according to claim 10 or 12, characterized in that a heating channel (32b, 32b ', 32b ") is formed between adjacent fluid channels (32a, 32a', 32 a").
14. The pressure accumulator for armature liquid insulation rotary baking solidification according to claim 9, characterized by further comprising a gas recovery chamber (10), wherein the gas recovery chamber (10) is simultaneously butted with the pressure accumulation chamber (33) and the pressure accumulation elements (32, 32', 32 ") to form a ring cavity, and the gas recovery chamber (10) is provided with an external gas flow recovery interface (47).
15. An accumulator device for armature liquid insulation rotary baking solidification according to claim 14, characterized in that a partition plate (60) is further provided, the partition plate (60) separates the gas recovery chamber (10) from the accumulator element (32, 32', 32 "), the pressure storage chamber (33), and a predetermined gap is left between the partition plate (10) and the outer periphery of the ferromagnetic member (100) so that the gas in the pressure storage chamber (33) can flow to the gas recovery chamber (10) only through the predetermined gap.
16. An accumulator device for armature liquid insulation rotary baking solidification according to any , wherein the winding (200) is disposed in the winding slot (100b) to form winding ends (201) protruding from both ends of the winding slot (100b), the accumulator device further comprises an annular cover (50) fixed to the armature, the annular cover (50) covers a plurality of winding (200) ends distributed annularly and is clamped to the port position of the winding slot (100b), and an annular inner cavity of the annular cover (50) can be filled with gas to blow gas to the port position.
17. The armature liquid insulation rotary bake solidification pressure accumulator according to claim 16, further comprising a gas slip ring (45), through which gas is supplied to said annular shroud (50) through said gas slip ring (45).
18. The armature liquid insulation rotary baking solidifying pressure accumulating device according to claim 16, wherein the ferromagnetic member (100) is provided with the winding slot (100b) having a circumferential wall as a winding slot circumferential wall, the annular cover (50) is sealed with the winding slot circumferential wall corresponding to the annular side wall of the winding slot circumferential wall, and a release cloth is provided between the annular side wall and the winding slot circumferential wall.
19. The armature liquid insulation rotary baking solidifying pressure accumulating device according to claim 16, wherein the annular cover (50) is a hollow side wall corresponding to the annular side wall of the winding slot peripheral wall, the hollow side wall is formed as a separate body or is provided with an air outlet ring (501a) near the end of the winding slot (100b), the air outlet ring (501a) is provided with an air outlet from the side of the ferromagnetic component (100) toward the port position of the winding slot (100b), and the hollow side wall can be filled with gas so that the gas can be discharged through the air outlet.
20. The pressure accumulator for armature liquid insulation rotary baking solidification according to claim 19, characterized in that the pressure accumulator has an end plate (301), the end plate (301) faces the air outlet ring (501a) near a peripheral wall of the winding slot (100b), and the air outlet ring (501a) is further provided with an air outlet facing the peripheral wall of the end plate (301).
21. The armature liquid insulating rotary baking solidifying pressure accumulating device according to claim 20, wherein the end plate (301) is further provided with a seal tooth (301a) near the circumferential wall of the winding slot (100 b); a contact sensor (70) is arranged between the peripheral wall of the end plate (301) and the air outlet ring (501a) to detect the distance between the peripheral wall and the air outlet ring (501 a).
22. An armature liquid insulating rotary bake solidification accumulator according to claim 16, wherein each of said fluid passages (32a, 32a ', 32a ") extends linearly in an axial direction of said accumulator member (32, 32', 32"), and the air injection path extends generally in a radial direction of said accumulator member (32, 32', 32 "); and, several of said fluid channels (32a, 32 a') are distributed arcuately.
23. An armature liquid insulating rotary baking solidification accumulator according to claim 22, characterized in that the inlet size of each of said fluid passages (32a, 32a ', 32a ") is the same and the outlet size is different to obtain the same inlet pressure and different outlet pressures, the outlet pressure of said fluid passages (32a, 32a ', 32 a") decreasing progressively from the center of said accumulator element (32, 32', 32 ") in clockwise and counterclockwise directions.
24. An armature liquid insulating rotary bake solidification accumulator according to claim 16, wherein each of said fluid passages (32a, 32a ', 32a ") extends along a circumferential arc of said accumulator member (32, 32', 32"), and the air blast path extends generally radially of said accumulator member (32, 32', 32 "); and several of said fluid channels (32a, 32a ', 32a ") are axially distributed along said pressure accumulating element (32, 32', 32").
25. An armature liquid insulation rotary baking solidification pressure accumulator according to claim 24 characterized in that heating channels (32b, 32b ', 32b ") are formed between adjacent said fluid channels (32a, 32a', 32 a").
26. The accumulator device for armature liquid insulation rotary baking solidification according to claim 16, further comprising a gas recovery chamber (10), wherein the gas recovery chamber (10) is simultaneously abutted with the pressure accumulation chamber (33) and the pressure accumulation element (32, 32', 32 ") to form a ring cavity, and the gas recovery chamber (10) is provided with an external gas flow recovery interface (47).
27. An accumulator device for armature liquid insulation rotary baking solidification according to claim 26, characterized in that a partition plate (60) is further provided, the partition plate (60) separating the gas recovery chamber (10) from the accumulator element (32, 32', 32 "), the pressure storage chamber (33), the partition plate (10) leaving a predetermined gap from the outer periphery of the ferromagnetic member (100) so that the gas in the pressure storage chamber (33) can flow to the gas recovery chamber (10) only through the predetermined gap.