CN112186914A

CN112186914A - Embedment stator, motor and processing frock

Info

Publication number: CN112186914A
Application number: CN202011070615.3A
Authority: CN
Inventors: 陈忠华; 周少华; 杨麟
Original assignee: Hongzhou Hongde Electric Machinery Co ltd
Current assignee: Hongzhou Hongde Electric Machinery Co ltd
Priority date: 2020-10-09
Filing date: 2020-10-09
Publication date: 2021-01-05

Abstract

The invention relates to the technical field of motor stators, in particular to an encapsulated stator, a motor and a processing tool. The method comprises the following steps: stator laminations, coils; the coil comprises a plurality of winding wires, and gaps are arranged among the winding wires; the stator lamination is arranged between the two coils; the inner wall of the stator lamination is provided with a wire embedding groove, and wires for conducting the coils on two sides are embedded in the wire embedding groove; the coil is wrapped by the encapsulation shell, a heat conduction channel is arranged in the encapsulation shell, and the inner wall of the heat conduction channel is fully attached to the winding lead; the stator lamination is provided with a heat dissipation part, and the heat dissipation part surrounds the periphery of the encapsulation shell. In the prior art, the normal heat dissipation of the stator is seriously influenced by the form of installing the shell outside the stator. Compared with the prior art, the invention can directly transmit the heat generated by the stator to the outside through the encapsulation shell, thereby optimizing the heat dissipation mechanism and improving the heat dissipation efficiency.

Description

Embedment stator, motor and processing frock

Technical Field

The invention relates to the technical field of motor stators, in particular to an encapsulated stator, a motor and a processing tool.

Background

The stator is a stationary part of the electrical machine in which it is used to generate a rotating magnetic field. With the continuous development of the technology, the performance requirements of the stator are higher and higher, for example: the stator is required to have better heat dissipation, water resistance and corrosion resistance, so that the original stator structure needs to be treated to a certain extent.

Chinese patent discloses a stator assembly and plastic envelope shell and have plastic envelope motor of this stator assembly [ application number: CN201320775352.5, publication No.: CN203660851U ] includes: the fixed columns are ladder columns which are convexly arranged on the plastic package shell body and have the outer diameter larger than the inner diameter of the fixed hole in the Hall circuit board, and the first column platform which is convexly arranged at the top of the first column platform and has the outer diameter matched with the inner diameter of the fixed hole in the Hall circuit board is arranged on the Hall circuit board. Although the technical scheme disclosed in the patent adopts the independent shell installed outside the stator, so that the stator has the waterproof and anti-corrosion performances, the normal heat dissipation of the stator is seriously affected by installing one shell outside the stator.

Disclosure of Invention

Aiming at the technical problems in the prior art, the invention provides an encapsulated stator, a motor and a processing tool.

In order to solve the technical problems, the invention provides the following technical scheme:

a potted stator comprising: stator laminations, coils; the coil comprises a plurality of winding wires, and gaps are arranged among the winding wires; the stator lamination is arranged between the two coils; the inner wall of the stator lamination is provided with a wire embedding groove, and wires for conducting the coils on two sides are embedded in the wire embedding groove; the coil is wrapped by the encapsulation shell, a heat conduction channel is arranged in the encapsulation shell, and the inner wall of the heat conduction channel is fully attached to the winding lead; the stator lamination is provided with a heat dissipation part, and the heat dissipation part surrounds the periphery of the encapsulation shell.

The encapsulation shell is coated on the surface of the coil. Therefore, the encapsulation shell can effectively prevent water, corrosive liquid and the like from having adverse effects on the solenoid, meanwhile, if an independent shell installation mode is adopted, air exists in a gap between the shell and the solenoid, and heat generated by the solenoid needs to be transferred to the air and then to the shell and finally to the outside. Meanwhile, heat generated by the winding wires can be directly transferred to the outside through the heat dissipation part on the stator lamination. Therefore, the invention effectively optimizes the heat dissipation mechanism, improves the heat dissipation efficiency and further effectively overcomes the technical prejudice that the normal heat dissipation of the winding lead is influenced by the object coated outside the winding lead.

Further, the encapsulation shell is formed by pouring encapsulation resin, and the encapsulation resin fills gaps among the winding leads to form a heat conduction channel; the encapsulation shell comprises an upper encapsulation shell, a lower encapsulation shell and a connecting plate; the upper encapsulating shell and the lower encapsulating shell correspond to the two coils respectively; the connecting plate is connected with the upper potting shell and the lower potting shell; the connecting plate is embedded in the wire embedding groove and covers the surface of the wire.

Furthermore, a wire clamp is arranged on the upper potting shell or the lower potting shell; the wire clamp is provided with a wire through hole.

Furthermore, the pouring sealant resin is epoxy resin.

A potted motor comprising a potted stator as described above.

The encapsulating stator machining tool is used for machining the encapsulating stator; the method comprises the following steps: a mold and an inner mold core; the number of the moulds is two; the die is provided with a glue pouring groove, and the glue pouring groove can be attached to the stator lamination to form a channel for filling potting resin; the die is provided with a fluid channel which is communicated with the filling and sealing groove; the outer diameter of the inner mold core corresponds to the inner diameter of the stator lamination.

Furthermore, a plurality of positioning plates are also arranged on the die; the positioning plate is provided with a groove corresponding to the shape of the stator lamination; the locating plate surrounds the periphery of the glue pouring groove.

Further, the device also comprises a positioning die; the inner mold core is sleeved on the positioning mold; the mould is provided with a through hole corresponding to the positioning mould, and the circle center of the through hole is coincided with the circle center of the glue pouring groove.

Further, the system also comprises a line card; the wire clamp is provided with a wire through hole; the outer wall of one of the glue pouring grooves is provided with a groove corresponding to the wire clamp.

Furthermore, the device also comprises a locking bolt; the locking bolt comprises a screw rod and a spanner; two ends of the screw rod are provided with collision parts; one end of the wrench is provided with an eccentric wheel, and the wrench can be connected with the screw rod through the eccentric wheel in a swinging manner; ear-shaped bulges corresponding to the screw rods are arranged on the two sides of the die.

Compared with the prior art, the invention has the following advantages:

by pouring the molded encapsulation shell outside the coil, the invention does not need to produce parts with different shapes independently, thereby effectively reducing the cost of the invention.

The solenoid can be effectively protected from being corroded by water and corrosive liquid through the encapsulating shell. Meanwhile, the insulating, high temperature resistant, refrigerant resistant, oil resistant, acid and alkali resistant and flame retardant properties of the stator can be effectively improved through the encapsulating shell.

The impact of external force on the solenoid can be effectively reduced through the encapsulating shell.

One part of heat generated by the coil is directly transmitted to the outside through the encapsulation shell, and the other part of heat is directly transmitted to the outside through the stator lamination, so that the heat dissipation mechanism is effectively optimized, and the heat dissipation efficiency is improved.

Stator lamination protrusion and embedment shell expose outside for the embedment shell can not exert an influence to stator lamination's shape and thickness, need not to change original motor mounting process on the one hand, thereby is favorable to subsequent motor installation, and on the other hand helps reducing the volume of motor.

Compared with an injection molding mode, the invention can effectively prevent the winding lead from being damaged in the processing process through the injection molding mode, so that the current in the stator is more stable in the running process of the stator, the heat generated by the stator is effectively reduced, and the encapsulation shell is further favorable for radiating the stator.

The encapsulation shell can be encapsulated and molded at one time by matching the die, the inner die core and the positioning die. Meanwhile, manual or automatic machine glue filling can be carried out at normal temperature, glue filling after heating is not needed, curing and demolding can be carried out at normal temperature for 5 hours without high-temperature baking, curing can be carried out by baking for 1 hour at the temperature of 60-80 ℃ by utilizing a baking channel, and mass production is facilitated.

Through the ply-yarn drill, need not to bore on the embedment shell, ensured the integrality of embedment shell on the one hand, on the other hand is convenient for industrial production.

The line card is made of rubber, and can effectively prevent the lead-out wire from being broken due to the influence of external force.

In the encapsulating process, the two fluid channels are utilized, on one hand, encapsulation can be injected from one fluid channel, and air is timely discharged from the other fluid channel, so that bubbles existing in the cured encapsulating shell are effectively prevented,

In the filling and sealing process, the fluid channel is located at the highest point, and one side of the glue pouring groove opposite to the fluid channel is the lowest point, so that the glue pouring groove can be gathered at the lowest point instead of spreading all around along the bottom surface of the glue pouring groove by utilizing the gravity and the annular structure of the glue pouring groove. Therefore, the contact area between the potting adhesive resin and the potting groove during initial glue injection can be effectively reduced, and timely removal of air is facilitated, so that bubbles in the cured potting shell are further prevented.

Through the locking bolt, can make mould and stator lamination fully laminate, effectually avoided on the one hand the filling and sealing resin to spill over from the space between mould and the stator lamination, on the other hand has effectually avoided the filling and sealing resin to spill over from the gap of ply-yarn drill.

Drawings

FIG. 1: potting stator structure diagram.

FIG. 2: the overall structure of the tool.

FIG. 3: tool explosion diagram.

FIG. 4: the structure of the mold.

FIG. 5: line card structure chart.

FIG. 6: and positioning the mold structure diagram.

In the figure: 1-stator lamination, 11-heat dissipation part, 12-rotor through port, 3-potting shell, 31-upper potting shell, 32-lower potting shell, 321-line card, 3211-lead through hole, 33-connecting plate, 4-mold, 41-potting groove, 42-fluid channel, 43-positioning plate, 44-through hole, 45-lug protrusion, 5-inner mold core, 6-positioning mold, 61-socket joint part, 62-limiting part, 7-locking bolt, 71-lead screw, 711-interference part, 72-wrench and 721-eccentric wheel.

Detailed Description

The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.

The first embodiment is as follows:

a potted stator comprising: stator lamination 1, coil. The coil comprises a plurality of winding wires, and gaps are arranged among the winding wires. The stator lamination 1 is arranged between two coils. The inner wall of the stator lamination 1 is provided with a wire embedding groove, and wires for conducting the coils on two sides are embedded in the wire embedding groove. The potting device is characterized by further comprising a potting shell 3, wherein the potting shell 3 is formed by potting adhesive resin in a pouring mode. Compared with an injection molding mode, the winding lead is not easily damaged in the injection process, so that the current inside the stator is more stable in the operation process, and the heat generated by the stator in the operation process is reduced. The stator lamination 1 is provided with a heat dissipation part 11, and the heat dissipation part 11 surrounds the potting shell 3. The potting case 3 includes an upper potting case 31, a lower potting case 32, and a connecting plate 33. The upper potting shell 31 and the lower potting shell 32 are respectively coated on the surfaces of the coils on the two sides. The upper potting shell 31 and the lower potting shell 32 are connected into a whole by the connecting plate 33, the connecting plate 33 is embedded in the wire embedding groove, and the connecting plate 33 covers the surface of the lead.

In practical use, the encapsulation shell 3 can protect the solenoid from being corroded by water and corrosive liquid, so that the insulation, high temperature resistance, refrigerant resistance, oil resistance, acid and alkali resistance and flame retardance of the stator are enhanced, and the impact of external force on the solenoid can be effectively reduced through the encapsulation shell 3. Meanwhile, compared with a mode of installing a separate shell outside the stator, the encapsulation shell 3 is formed by pouring, and parts in different shapes do not need to be processed separately, so that the cost is effectively reduced. Meanwhile, if a mode of installing an independent shell outside the stator is adopted, air is filled in a gap between the shell and the coil, and heat generated by the coil needs to be transferred to the air firstly and then transferred to the shell and then to the outside. And at normal temperature, the heat conductivity coefficient of air is 0.0267W/MK, and the heat conductivity coefficient of the potting adhesive resin adopting the epoxy resin is higher than that of the air and is 0.6-1.5W/MK, so that the heat dissipation of the coil is facilitated. The stator lamination 1 is further provided with a heat dissipation part 11, and the heat dissipation part 11 surrounds the potting shell 3. On the one hand, the coil generates partial heat which can be directly transmitted to the outside through the stator lamination, so that the heat dissipation efficiency is further improved, on the other hand, the coating area of the encapsulation shell 3 is reduced, the using amount of the encapsulation adhesive resin is reduced, and the cost is further reduced. Meanwhile, the heat dissipation part 11 can be formed by utilizing the original structure of the stator lamination 1, so that the shape and the thickness of the stator lamination 1 can not be affected, on one hand, the original installation process of the motor does not need to be changed, the subsequent motor installation is facilitated, and on the other hand, the reduction of the volume of the motor is facilitated.

The upper potting shell 31 or the lower potting shell 32 is further provided with a line card 321, the line card 321 is provided with a plurality of lead through holes 3211, and lead-out leads of the stator can normally pass through the potting shell 3 through the lead through holes 3211.

Example two:

a canned motor employing a canned stator as described in example one.

Example three:

the utility model provides a processing frock of embedment stator, includes: the mould 4, the inner mould core 5, the positioning mould 6 and the line clamp 321. The mold 4 is made of a weakly viscous material such as: polytetrafluoroethylene, nylon 66, PE plastic. The inner mold core 5 is made of silicon rubber or polytetrafluoroethylene. The number of the moulds is two, and the mould 4 is provided with a glue pouring groove 41, and the glue pouring groove 41 is in a circular ring shape. The mold 4 is further provided with a fluid passage 42, the fluid passage 42 extends from the outer surface of the mold 4 to the center of the glue pouring groove 41, and the fluid passage 42 penetrates through the outer wall of the glue pouring groove 41 to be communicated with the inside of the glue pouring groove 41. The die 4 is further provided with a plurality of positioning plates 43, grooves corresponding to the stator laminations 1 in shape are formed in the positioning plates 43, and the positioning plates 43 are uniformly distributed around the glue pouring grooves 41 along the circumferential direction of the glue pouring grooves 41.

The positioning die 6 includes a sleeve portion 61 and a stopper portion 62. The sleeve-joint part 61 and the limiting part 62 are both cylindrical and fixedly connected, and the axes of the sleeve-joint part and the limiting part coincide. The radius of the sleeve portion 61 is smaller than that of the limiting portion 62, so that one end of the positioning die 6 is narrow and the other end is wide. The mould 4 is provided with a through hole 44 corresponding to the positioning mould 6, and the circle center of the through hole 44 coincides with the circle center of the glue pouring groove 41, so that the positioning mould 6 can be inserted into the mould 4 through the through hole 44. The inner mold core 5 is annular, and the inner diameter of the inner mold core 5 corresponds to the radius of the sleeving part 61, so that the inner mold core 5 can be sleeved on the sleeving part 61. The outer diameter of the inner mould core 5 corresponds to the inner diameter of the stator lamination 1, so that the outer edge of the inner mould core 5 can be brought into contact with the inner wall of the stator lamination 1 when the inner mould core 5 is inserted into the rotor passage 12 of the stator lamination 1.

The line card 321 is made of nitrile rubber. The line card 321 is provided with a lead through hole 3211, and the lead through hole 3211 corresponds to a lead-out lead of the stator. The outer wall of one of the glue pouring grooves 41 is provided with a groove corresponding to the line card 321, so that the line card 321 can be embedded in the outer wall of the glue pouring groove 41.

In practical applications, the mold 4 with the grooves corresponding to the line cards 321 is referred to as a lower mold, and the other mold 4 is referred to as an upper mold. Lead-out wires of the stator penetrate through the wire through holes 3211 of the wire clamp 321, and the wire clamp 321 is embedded in corresponding grooves on the glue pouring groove 41. Aligning the coil of the stator with the potting groove 41 of the lower mold, aligning the stator lamination 1 of the stator with the positioning plate 43 of the lower mold, and pushing the stator so that the coil at one side of the stator lamination 1 is embedded in the potting groove 41 of the lower mold and the outer edge of the stator lamination 1 is attached to the positioning plate 43. And continuously pushing the stator to enable the stator lamination 1 of the stator to be fully attached to the outer edge of the glue pouring groove 41, so that a channel for filling the potting glue resin is formed by the glue pouring groove 41 and the stator lamination. The inner mold core 5 is sleeved on the sleeving part 61 of the positioning mold 6, and the inner mold core 5 is pushed until the inner mold core 5 is abutted against the limiting part 62. At this time, the stopper 62 is aligned with the through hole 44 of the lower mold. The inner mold core 5 is pushed, so that the limiting part 62 penetrates through the rotor through opening 12 of the stator lamination 1, and the inner mold core 5 is pushed continuously until the limiting part 62 is completely inserted into the through hole 44 of the lower mold. Under the influence of the limited part 62, the inner mould core 5 will stay at a position corresponding to the winding nest of the stator lamination 1, at which time the outer edge of the inner mould core 5 is in abutment with the winding nest, thereby jointly forming a drainage channel. Aligning the through hole 44 of the upper die with the sleeve joint part 61 and aligning the positioning plate 43 of the upper die with the outer edge of the stator lamination 1, and pressing the upper die until the glue pouring groove 41 of the upper die is attached to the stator lamination 1. At this time, the upper and lower molds are turned over so that the fluid passages 42 of the upper and lower molds are parallel to the vertical direction. At this time, the fluid passage 42 is the highest point, and the side of the potting groove 41 opposite to the fluid passage 42 is the lowest point. The potting resin is injected into the opening of one of the flow channels 42, wherein the opening of the flow channel 42 is flared to facilitate the injection of the potting resin. At this moment, under the effect of gravity, the potting adhesive resin flows to the lowest point of potting adhesive groove 41 to along with the continuous injection of potting adhesive resin, the inside air of potting adhesive groove 41 is constantly extruded to the potting adhesive resin, thereby makes the space that the potting adhesive resin can fill between the winding wire, thereby closely laminates with the winding wire, simultaneously, by the air of extruding will discharge to the external world through another fluid passage 42. Continuing such as the potting adhesive resin, the potting adhesive resin will overflow the drainage channel formed by the inner mold core 5, on one hand, the potting adhesive resin can coat the wires in the embedding grooves to form the connecting plate 33, and on the other hand, the potting adhesive resin can flow into the other potting adhesive groove 41 through the drainage channel. Continuing with, for example, the potting adhesive resin is able to fill the channels of the two potting grooves 41 sufficiently to form the potting housing 3. After the potting adhesive resin is solidified and cooled, the potting adhesive resin filled in the gaps of the winding wires can be solidified to form heat conduction channels which are fully attached to the winding wires. The upper and lower molds are separated to take out the stator. At this time, the potting adhesive resin case 3 and the line card 321 are already integrated, and the line card 321 is taken out at the same time as the stator is taken out. Wherein, influenced by winding wire arrangement, length, interval of heat conduction passageway are not unified.

The locking bolt 7 is further included, and the locking bolt 7 comprises a screw rod 71 and a wrench 72. The two ends of the screw rod 71 are provided with interference parts 711, one end of the wrench 72 is provided with an eccentric wheel 721, and the wrench 72 is swingably connected with one end of the screw rod 71 through the eccentric wheel 721. The two sides of the die 4 are provided with lug-shaped bulges 45 corresponding to the screw rods 71. After the upper mold and the lower mold are respectively nested at both sides of the stator, the screw rod 71 is embedded in the lug-shaped protrusion 45, and the combined body of the upper mold and the lower mold is placed between the abutting parts 711. At this moment, pull spanner 72 to make spanner 72 drive the eccentric wheel 721 swing, and then promote one of them conflict portion through eccentric wheel 721 and be close to another conflict portion, then shorten the interval between two conflict portions, finally further make two moulds laminate mutually with stator lamination 1, simultaneously, compress tightly ply-yarn drill 321. This prevents, on the one hand, the potting compound resin from leaking out of the gap between the mold 4 and the stator lamination 1 during the potting process and, on the other hand, the potting compound resin from leaking out of the line clip 321.

It is noted that the upper and lower molds and the upper and lower potting housings 31 and 32 described herein are only used to distinguish the components and do not exactly indicate the relationship in spatial location between the components.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.

Claims

1. A potted stator, comprising: the method comprises the following steps: stator lamination (1), coil;

the coil comprises a plurality of winding wires, and gaps are arranged among the winding wires;

the stator lamination (1) is arranged between two coils;

the inner wall of the stator lamination (1) is provided with a wire embedding groove, and a lead for conducting coils on two sides is embedded in the wire embedding groove;

the coil is characterized by further comprising a potting shell (3), wherein the potting shell (3) is coated on the surface of the coil, a heat conduction channel is arranged in the potting shell (3), and the inner wall of the heat conduction channel is fully attached to the winding lead;

the stator lamination (1) is provided with a heat dissipation part (11), and the heat dissipation part (11) surrounds the periphery of the encapsulation shell (3).

2. The potted stator of claim 1, wherein: the encapsulating shell (3) is formed by adopting encapsulating resin in an encapsulating mode, and the encapsulating resin fills gaps among the winding leads to form the heat conducting channel;

the encapsulation shell (3) comprises an upper encapsulation shell (31), a lower encapsulation shell (32) and a connecting plate (33);

the upper potting shell (31) and the lower potting shell (32) correspond to the two coils respectively;

the connecting plate (33) connects the upper potting shell (31) with the lower potting shell (32);

the connecting plate (33) is embedded in the wire embedding groove, and the connecting plate (33) covers the surface of the wire.

3. A potted stator according to claim 2 wherein: a line card (321) is further arranged on the upper potting shell (31) or the lower potting shell (32);

the line card (321) is provided with a lead through hole (3211).

4. A potted stator according to claim 2 wherein: the potting adhesive resin is epoxy resin.

5. An embedment motor, its characterized in that: comprising a potted stator as claimed in any one of claims 1 to 4.

6. The utility model provides an embedment stator processing frock which characterized in that: for processing a potted stator as claimed in any one of claims 1 to 4;

the method comprises the following steps: a mould (4) and an inner mould core (5);

the number of the moulds (4) is two;

the die (4) is provided with a glue pouring groove (41), and the glue pouring groove (41) can be attached to the stator lamination (1) to form a channel for filling potting glue resin;

a fluid channel (42) is arranged on the die (4), and the fluid channel (42) is communicated with the filling groove (41);

the outer diameter of the inner mold core (5) corresponds to the inner diameter of the stator lamination (1).

7. The tooling of claim 6, wherein: the mould (4) is also provided with a plurality of positioning plates (43);

a groove corresponding to the shape of the stator lamination is arranged on the positioning plate (43);

the positioning plate (43) surrounds the periphery of the glue pouring groove (41).

8. The tooling of claim 6, wherein: also comprises a positioning die (6);

the inner mold core (5) is sleeved on the positioning mold (6);

the die (4) is provided with a through hole (44) corresponding to the positioning die (6), and the circle center of the through hole (44) is coincided with the circle center of the glue pouring groove (41).

9. The tooling of claim 6, wherein: also includes a line card (321);

the wire clamp (321) is provided with a wire through hole (3211);

the outer wall of one of the glue pouring grooves (41) is provided with a groove corresponding to the line card (321).

10. The tooling of claim 6, wherein: the locking bolt (7) is also included;

the locking bolt (7) comprises a screw rod (71) and a wrench (72);

two ends of the screw rod (71) are provided with abutting parts (711);

one end of the wrench (72) is provided with an eccentric wheel (721), and the wrench (72) is connected with the screw rod (71) through the eccentric wheel (721) in a swinging manner;

ear-shaped bulges (45) corresponding to the screw rods (71) are arranged on two sides of the die (4).