CN109888949B - Rotor core for permanent magnet synchronous motor and mounting method thereof - Google Patents
Rotor core for permanent magnet synchronous motor and mounting method thereof Download PDFInfo
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- CN109888949B CN109888949B CN201910163387.5A CN201910163387A CN109888949B CN 109888949 B CN109888949 B CN 109888949B CN 201910163387 A CN201910163387 A CN 201910163387A CN 109888949 B CN109888949 B CN 109888949B
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Abstract
The invention discloses a rotor core for a permanent magnet synchronous motor, which comprises a rotor core and a connecting structure, wherein the connecting structure comprises a connecting column and a fixing nut, the rotor core comprises a lower core, a middle core and an upper core, a first permanent magnet through groove is formed in the lower core, the connecting column is fixedly welded in the middle of the lower core, a second permanent magnet through groove and a permanent magnet lower mounting groove are formed in the middle core, and a third permanent magnet through groove and a permanent magnet upper mounting groove are formed in the upper core; the method for mounting the rotor core for the permanent magnet synchronous motor comprises the following steps: 1) fixing the lower iron core; 2) mounting the lower iron core and the middle iron core; 3) mounting a permanent magnet; 4) mounting and fixing an upper iron core; the installation of permanent magnet and rotor core is very firm, has stronger stable in structure performance, and this rotor core can reduce the wind friction resistance that the motor received because the surface is smooth at the in-process of following the high-speed rotation of motor, makes the motor noise alleviate.
Description
Technical Field
The invention belongs to the field of production of motor accessories, and particularly relates to a rotor core for a permanent magnet synchronous motor and an installation method thereof.
Background
In recent years, built-in permanent magnet synchronous motors are mostly adopted as driving motors for new energy automobiles, and the motors have the advantages of high power density, good mechanical characteristics and high rotating speed range, and are widely concerned and applied to driving systems of electric automobiles.
The conventional rotor core of the permanent magnet synchronous motor is divided into a surface type rotor core and an insertion type rotor core, the surface type rotor structure is divided into a convex type rotor core and an embedded type rotor core, and the permanent magnet provides a magnetic flux direction. The tile magnetic steel is pasted on the surface of the convex rotor core, the non-magnetic cylinder with the protection effect is generally sleeved between the outer surface of the permanent magnet and the inner circle of the stator core, or the surface of the permanent magnet magnetic pole is covered by a weftless glass ribbon to serve as a protection layer, so that the magnetic steel is prevented from being separated from the rotor core under the combined action of centrifugal force and electromagnetic torque when exceeding a certain rotating speed, the cost of the motor is increased, the production process is added, the protection device is added on the outer side of the magnetic pole, the surface of the rotor is not smooth enough, and the motor can be in the high-speed rotating process to cause wind friction and noise of the motor.
Disclosure of Invention
The invention aims to provide a technical scheme of a rotor iron core for a permanent magnet synchronous motor and an installation method thereof aiming at the defects in the prior art, the traditional rotor iron core is divided into three layers, and then a permanent magnet is clamped between an upper iron core and a middle iron core, so that the installation of the rotor iron core and the permanent magnet does not need to be additionally provided with a protective layer, and the installation is very convenient.
In order to solve the technical problems, the invention adopts the following technical scheme: a rotor core for a permanent magnet synchronous motor comprises a rotor core, and is characterized in that: the permanent magnet rotor comprises a rotor core and a rotor core, wherein the rotor core comprises a lower iron core, a middle iron core and an upper iron core, the outer diameter of the lower iron core, the outer diameter of the middle iron core and the outer diameter of the lower iron core are equal, a first permanent magnet through groove is formed in the lower iron core, the connecting column is fixedly welded in the middle of the lower iron core, the middle iron core is installed above the lower iron core, the middle iron core is sleeved on the connecting column, a groove is formed in the bottom of the middle iron core, a convex ring is arranged on the lower iron core and installed in the groove, an upper iron core is arranged above the middle iron core and sleeved on the connecting column, a second permanent magnet through groove and a permanent magnet lower installation groove are formed in the middle iron core, the permanent magnet lower installation groove surrounds the outer side of the second permanent magnet through groove, the depth of the permanent magnet lower installation groove is half of the thickness of the middle iron core, a third, the permanent magnet upper mounting groove is formed in the lower surface of the upper iron core, the depth of the permanent magnet upper mounting groove is half of the thickness of the upper iron core, and the fixing nut is fixedly connected to the top end of the connecting column; the rotor iron core provided by the device is divided into three layers, the lower iron core is provided with the connecting column, the lower iron core, the middle iron core and the upper iron core are respectively and fixedly connected with the connecting column, the detachable connection among the lower iron core, the middle iron core and the upper iron core is realized, the outer diameters of the upper iron core, the middle iron core and the lower iron core are the same, the outer diameters of the three parts are overlapped after the three parts are connected, which ensures that the outer side surface of the rotor core is smooth and flat, the connection between the middle iron core and the lower iron core is more compact through the design of the convex ring and the groove, the permanent magnet lower mounting groove and the permanent magnet upper mounting groove can clamp the permanent magnet with a bulge in the middle from the upper side and the lower side, the top of the permanent magnet penetrates through the third permanent magnet penetrating groove to be exposed on the surface of the upper iron core, and the upper iron core is more firmly connected with the connecting column by being fixed by the fixing nut from the top, so that the permanent magnet is firmly connected with the rotor iron core.
Further, a first rotating shaft through hole is formed in the middle of the lower iron core, a first rotor wire slot is formed in the outer side of the lower iron core, and the first rotor wire slot is formed in the outer side of the first permanent magnet through slot; the motor shaft of permanent-magnet machine has been guaranteed in first pivot perforation can pass down unshakable in one's determination, and the fenestrate setting of first pivot has played the effect of datum line when the erection joint simultaneously, makes the basis of installing of erection joint, makes the installation of erection joint guarantee, and first rotor wire casing has made things convenient for shuttling of motor wiring, plays to gather together and accomodate the effect to the wiring.
Furthermore, a second rotating shaft through hole is formed in the middle of the middle iron core, a second internal thread is formed in the inner side wall of the second rotating shaft through hole, a second rotor wire slot is formed in the outer side of the middle iron core and is formed in the outer side of the second permanent magnet through slot, and the size of the second rotor wire slot is matched with that of the first rotor wire slot; the second pivot is perforated and is guaranteed that the center iron core can be connected with the connecting column fixedly, the second internal thread is arranged to enable the center iron core to be connected with the connecting column fixedly in a rotating mode, the second rotor wire slot facilitates the shuttling of motor wiring, and the wiring is gathered and stored.
Furthermore, a third rotating shaft through hole is formed in the middle of the upper iron core, a third internal thread is formed in the inner side wall of the third rotating shaft through hole, a third rotor wire slot is formed in the outer side of the upper iron core and is formed in the outer side of a third permanent magnet through slot, and the size of the third rotor wire slot is matched with that of the second rotor wire slot; the third pivot is perforated and is guaranteed to go up the iron core and can be with spliced pole fixed connection, and the setting of third internal thread makes and goes up the iron core and can make things convenient for shuttling of motor wiring through rotatory mode and spliced pole fixed connection, and the third rotor wire casing plays to gather together and accomodate the effect to the wiring.
Furthermore, a fourth rotating shaft through hole is formed in the connecting column; the perforated setting of fourth pivot makes permanent-magnet machine's motor shaft can pass the spliced pole.
Furthermore, a first internal thread is arranged on the inner side wall of the fixing nut, the outer diameter of the fixing nut is larger than that of the connecting column, and the upper end face of the fixing nut is flush with the upper end face of the connecting column; the arrangement of the first internal thread enables the fixing nut to be fixedly connected with the external thread on the outer side of the connecting column, so that the fixing of the fixing nut on the lower upper iron core, the lower iron core and the middle iron core is realized.
Furthermore, an external thread is arranged on the outer side wall of the connecting column, and the size of the external thread is matched with the first internal thread, the second internal thread and the third internal thread; after the fixing nut is installed on the connecting column, the upper surface of the fixing nut is flush with the upper surface of the connecting column, so that the appearance of the rotor core of the motor is smooth, and the working noise of the motor can be reduced.
The mounting method for the rotor core of the permanent magnet synchronous motor is characterized by comprising the following steps: the method comprises the following steps:
1) fixing of the lower iron core:
a. firstly, placing a limiting disc on an operation table, then fixing the limiting disc on the operation table by selecting a bolt with a head diameter larger than the diameter of the positioning hole and smaller than the through hole of the fourth rotating shaft, and screwing the bolt so that the bottom edge of the head of the bolt is tightly attached to the upper surface of the limiting disc; the limiting disc can be fixedly connected with the operating platform through the fixation of the bolts, the rotor core is installed by means of the limiting disc, the lower core does not need to be connected with the operating platform, the lower core can be fixed, the lower core does not need to be additionally connected with the operating platform in an auxiliary mode, and the smoothness of the surface of the rotor core is guaranteed;
b. then, a lower iron core is placed on a limiting disc, the position of the lower iron core is adjusted, the head of a bolt is completely positioned inside a first rotating shaft through hole, then the lower surface of the lower iron core is tightly attached to the upper surface of the limiting disc by pressing from the top of the lower iron core, the first permanent magnet through groove in the lower iron core is adjusted to be aligned with the position of an intubation tube installation groove in the limiting disc, then a fixing ring is surrounded on the outer side of the lower iron core, the fixing ring is tightened, the outer wall of the lower iron core is tightly attached to the fixing ring, a connecting rod penetrates through the installation holes in the end portion of the fixing ring, a locking piece penetrates through connecting holes in two ends of the connecting rod, the limiting effect on the fixing ring is achieved, and finally the bottom of; the lower iron core is placed on the limiting disc firstly, the mounting position of the lower iron core is preliminarily determined, the first permanent magnet through groove on the lower iron core can be aligned with the cannula mounting groove preset on the limiting disc, so that the cannula can be exposed, the connection between the permanent magnet mold and the cannula in the later period is facilitated, the lower iron core is fixedly surrounded from the outer side wall of the lower iron core by the fixing ring, and then the fixing ring is fixedly welded with the limiting disc, the fixing of the position of the lower iron core is indirectly realized, the position of the lower iron core can be prevented from being changed when the iron core, the upper iron core and the permanent magnet are mounted, so that the mounting variable is reduced, and the mounting accuracy of the rotor iron core is ensured;
2) installation of lower and middle cores:
a. firstly, placing a connecting column on a lower iron core, aligning the side wall of a fourth rotating shaft through hole of the connecting column with the side wall of a first rotating shaft through hole of the lower iron core, and welding the bottom of the connecting column on the lower iron core; the connecting column is aligned with the lower iron core, so that the fourth rotating shaft through hole is aligned with the first rotating shaft through hole, and the rotating shaft of the motor can smoothly pass through the rotor iron core;
b. then, the central iron core is placed on the connecting column, a second internal thread on the side wall of a second rotating shaft through hole of the central iron core is connected with an external thread on the connecting column, the central iron core rotates downwards along the connecting column until the lower surface of the central iron core is contacted with the upper surface of the lower iron core, and a convex ring on the lower iron core is ensured to be positioned in a groove on the lower surface of the central iron core, namely the convex ring cannot be seen through naked eye observation; the middle iron core is rotatably arranged on the connecting column, so that the middle iron core and the lower iron core can be fixedly arranged, other auxiliary connecting parts are not needed between the middle iron core and the lower iron core, and the middle iron core and the upper iron core can be more tightly connected through the clamping connection of the convex ring and the groove;
c. respectively inserting a prefabricated permanent magnet mold into an insertion pipe arranged at the bottom of the limiting disc from the upper part, pressing the permanent magnet mold from the top of the permanent magnet mold to enable all the insertion pipes arranged in an insertion pipe installation groove to enter an insertion groove at the bottom of the permanent magnet, and if a second permanent magnet penetrating groove blocks connection of the permanent magnet mold and the insertion pipes, readjusting the position of the middle iron core until the insertion pipes completely enter the insertion groove; the length of the preset insertion pipe is matched with the size of an insertion groove formed in the bottom of the permanent magnet mold, if the insertion pipe completely enters the insertion groove, the permanent magnet mold can be installed at a preset angle, if the insertion pipe cannot completely enter the insertion groove, the permanent magnet mold is installed to be inclined, and other reasons need to be taken down for installation again, the permanent magnet mold can be used for checking the installation position of the middle iron core, and the installation of the middle iron core is ensured to be coincident with the lower iron core;
d. finally, taking down the permanent magnet mould;
3) installation of the permanent magnet:
the permanent magnets are sequentially placed into the second permanent magnet through grooves, so that the permanent magnets are vertically placed upwards, and the lower surfaces of the protrusions of the permanent magnets are in contact with the bottom of the permanent magnet lower mounting groove;
4) and (3) mounting and fixing an upper iron core:
a. firstly, placing a third connecting rod through hole in the middle of an upper iron core on the outer side of a connecting column, enabling a third internal thread to move downwards along an external thread on the outer side of the connecting column, ensuring that the upper end part of a permanent magnet protrudes and is positioned in an upper mounting groove of the permanent magnet, and then rotating the upper iron core along the connecting column until the upper iron core cannot rotate, namely, a third rotor wire slot and a second rotor wire slot below the upper iron core need to be overlapped; the top end of the permanent magnet penetrates through the second permanent magnet through groove and the third permanent magnet through groove and is exposed outside the upper iron core;
b. rotating the fixing nut to move downwards along the connecting column to ensure that the first internal thread is connected with the external thread on the connecting column, fastening the fixing nut to rotate downwards along the direction of the external thread by using a rotating tool until the fixing nut cannot rotate, and checking the upper surface of the fixing nut to ensure that the upper surface of the fixing nut is not higher than the upper surface of the connecting column; the fixing nut is fixed with the connecting column from the top, so that the influence on the accuracy of the rotor core caused by the looseness generated between the upper iron core, the middle iron core and the connecting column and the looseness generated between the lower iron core and the connecting column during long-time use is avoided;
c. finally, the connection seams among the upper iron core, the middle iron core and the lower iron core are sealed by glue, the firmness of the rotor iron core is ensured, and the fixing ring is taken down; the connecting joints of the three parts are sealed by glue, so that the smoothness of the surface of the rotor core can be ensured.
Due to the adoption of the technical scheme, the invention has the following beneficial effects:
the rotor iron core provided by the device is divided into three layers, the lower iron core is provided with the connecting column, the lower iron core, the middle iron core and the upper iron core are respectively and fixedly connected with the connecting column, the detachable connection among the lower iron core, the middle iron core and the upper iron core is realized, the outer diameters of the upper iron core, the middle iron core and the lower iron core are the same, the outer diameters of the three parts are overlapped after the three parts are connected, which ensures that the outer side surface of the rotor core is smooth and flat, the connection between the middle iron core and the lower iron core is more compact through the design of the convex ring and the groove, the permanent magnet lower mounting groove and the permanent magnet upper mounting groove can clamp the permanent magnet with a bulge in the middle from the upper side and the lower side, the top of the permanent magnet penetrates through the third permanent magnet penetrating groove to be exposed on the surface of the upper iron core, and the upper iron core is more firmly connected with the connecting column by being fixed by the fixing nut from the top, so that the permanent magnet is firmly connected with the rotor iron core.
The invention provides a technical scheme of a rotor iron core for a permanent magnet synchronous motor and an installation method thereof, the traditional rotor iron core is divided into three layers, and then a permanent magnet is clamped between an upper iron core and a middle iron core, so that the installation of the rotor iron core and the permanent magnet does not need to be additionally provided with a protective layer, and the installation is very convenient.
Drawings
The invention will be further described with reference to the accompanying drawings in which:
fig. 1 is a schematic structural view of a rotor core for a permanent magnet synchronous motor according to the present invention;
FIG. 2 is a schematic view of the connection between the lower core and the connecting post according to the present invention;
FIG. 3 is a schematic view of the lower surface structure of a middle core according to the present invention;
FIG. 4 is a schematic diagram of the upper surface structure of a middle core according to the present invention;
FIG. 5 is a schematic view of the lower surface of the upper core according to the present invention;
FIG. 6 is a schematic top view of the upper core of the present invention;
FIG. 7 is a schematic view of the connection between the limiting plate and the console according to the present invention;
FIG. 8 is a schematic view of an installation structure of a limiting plate and a lower core according to the present invention;
FIG. 9 is a schematic view of a mounting structure of a lower core and a middle core according to the present invention;
FIG. 10 is a schematic view showing the connection between a middle core and a permanent magnet according to the present invention;
FIG. 11 is a schematic view of the permanent magnet mold and cannula assembly of the present invention;
fig. 12 is an exploded view of the installation of the middle core, the upper core and the permanent magnet in the present invention.
In the figure: 1-a rotor core; 2-a linking structure; 3-connecting a column; 4-fixing the nut; 5-a lower iron core; 6-a middle iron core; 7-an upper iron core; 8-a first permanent magnet through slot; 9-a groove; 10-a convex ring; 11-a second permanent magnet through slot; 12-permanent magnet lower mounting groove; 13-a third permanent magnet through slot; 14-mounting grooves on the permanent magnets; 15-first shaft through hole; 16-a first rotor wire slot; 17-a second shaft through hole; 18-a second internal thread; 19-a second rotor wire slot; 20-a third rotating shaft through hole; 21-a third internal thread; 22-a third rotor wire slot; 23-a fourth shaft through hole; 24-a first internal thread; 25-external threads; 26-a limiting disc; 27-an operation table; 28-bolt; 29-a fixed ring; 30-mounting holes; 31-a connecting rod; 32-connecting hole; 33-cannula mounting slot; 34-a cannula; 35-permanent magnet mold; 36-a slot; 37-a permanent magnet; 38-a bump; 39-locking element.
Detailed Description
As shown in fig. 1 to 6, the rotor core for a permanent magnet synchronous motor according to the present invention comprises a rotor core 1 and a connection structure 2, wherein the connection structure 2 comprises a connection post 3 and a fixing nut 4, the rotor core 1 comprises a lower core 5, a middle core 6 and an upper core 7, the outer diameter of the lower core 5, the outer diameter of the middle core 6 and the outer diameter of the lower core 5 are equal, a first permanent magnet through groove 8 is formed on the lower core 5, the connection post 3 is fixedly welded in the middle of the lower core 5, the middle core 6 is installed above the lower core 5, the middle core 6 is sleeved on the connection post 3, a groove 9 is formed at the bottom of the middle core 6, a convex ring 10 is arranged on the lower core 5, the convex ring 10 is installed in the groove 9, the upper core 7 is arranged above the middle core 6, the upper core 7 is sleeved on the connection post 3, a second permanent magnet through groove 11 and a permanent magnet lower installation groove 12 are formed on the middle core 6, the permanent magnet lower mounting groove 12 surrounds the outer side of the second permanent magnet through groove 11, the depth of the permanent magnet lower mounting groove 12 is half of the thickness of the middle iron core 6, the upper iron core 7 is provided with a third permanent magnet through groove 13 and a permanent magnet upper mounting groove 14, the permanent magnet upper mounting groove 14 is arranged on the lower surface of the upper iron core 7, the depth of the permanent magnet upper mounting groove 14 is half of the thickness of the upper iron core 7, and the fixing nut 4 is fixedly connected to the top end of the connecting column 3; the rotor iron core 1 is divided into three layers, the connecting column 3 is arranged on the lower iron core 5, the middle iron core 6 and the upper iron core 7 are respectively and fixedly connected with the connecting column 3, the detachable connection between the lower iron core 5, the middle iron core 6 and the upper iron core 7 is realized, the outer diameters of the upper iron core 7, the middle iron core 6 and the lower iron core 5 are the same, the outer diameters of the three parts are superposed after the connection, the outer side surface of the rotor iron core 1 is smooth and flat, the connection between the middle iron core 6 and the lower iron core 5 is tighter through the design of the convex ring 10 and the groove 9, the permanent magnet lower mounting groove 12 and the permanent magnet upper mounting groove 14 can clamp the permanent magnet 37 with the bulge 38 in the middle part from the upper side and the lower side, the top of the permanent magnet 37 penetrates through the third permanent magnet penetrating groove 13 to be exposed on the surface of the upper iron core 7, the connection between the upper iron core 7 and the connecting, thereby making the connection of the permanent magnets 37 with the rotor core 1 firm. A first rotating shaft through hole 15 is formed in the middle of the lower iron core 5, a first rotor wire slot 16 is formed in the outer side of the lower iron core 5, and the first rotor wire slot 16 is formed in the outer side of the first permanent magnet through slot 8; first pivot perforation 15 has guaranteed that permanent-magnet machine's motor shaft can pass down iron core 5, and the setting of first pivot perforation 15 has played the effect of datum line when erection joint post 3 simultaneously, makes the foundation of installing of spliced pole 3, makes the installation of spliced pole 3 secure, and first rotor wire casing 16 has made things convenient for shuttling of motor wiring, plays to gather together and accomodate the effect to the wiring. A second rotating shaft through hole 17 is formed in the middle of the middle iron core 6, a second internal thread 18 is formed in the inner side wall of the second rotating shaft through hole 17, a second rotor wire slot 19 is formed in the outer side of the middle iron core 6, the second rotor wire slot 19 is formed in the outer side of the second permanent magnet through slot 11, and the size of the second rotor wire slot 19 is matched with that of the first rotor wire slot 16; the second pivot is perforated 17 and has been guaranteed that center core 6 can with spliced pole 3 fixed connection, and the setting up of second internal thread 18 makes center core 6 can be through rotatory mode and spliced pole 3 fixed connection, and second rotor wire casing 19 has made things convenient for shuttling of motor wiring, plays to gather together and accomodate the effect to the wiring. A third rotating shaft through hole 20 is formed in the middle of the upper iron core 7, third internal threads 21 are formed in the inner side wall of the third rotating shaft through hole 20, a third rotor wire slot 22 is formed in the outer side of the upper iron core 7, the third rotor wire slot 22 is formed in the outer side of the third permanent magnet through slot 13, and the size of the third rotor wire slot 22 is matched with that of the second rotor wire slot 19; the third rotating shaft through hole 20 ensures that the upper iron core 7 can be fixedly connected with the connecting column 3, the third internal thread 21 enables the upper iron core 7 to be fixedly connected with the connecting column 3 in a rotating mode, the third rotor wire slot 22 facilitates the wire connection of the motor to shuttle, and the wire is gathered and stored. A fourth rotating shaft through hole 23 is formed in the connecting column 3; the fourth shaft penetration hole 23 is provided to allow a motor shaft of the permanent magnet motor to pass through the connection post 3. A first internal thread 24 is arranged on the inner side wall of the fixing nut 4, the outer diameter of the fixing nut 4 is larger than that of the connecting column 3, and the upper end face of the fixing nut 4 is flush with the upper end face of the connecting column 3; the arrangement of the first internal thread 24 can enable the fixing nut 4 to be fixedly connected with the external thread 25 on the outer side of the connecting column 3, so that the fixing of the fixing nut 4 to the lower upper iron core 7, the middle iron core 6 and the lower iron core 5 is realized. The outer side wall of the connecting column 3 is provided with an external thread 25, and the size of the external thread 25 is matched with the first internal thread 24, the second internal thread 18 and the third internal thread 21; after the fixing nut 4 is installed on the connecting column 3, the upper surface of the fixing nut 4 is flush with the upper surface of the connecting column 3, so that the appearance of the rotor core 1 of the device is smooth, and the working noise of the motor can be reduced.
As shown in fig. 7 to 12, the method for mounting a rotor core for a permanent magnet synchronous motor as described above is adopted, and includes the steps of:
1) fixing of the lower core 5:
a. firstly, placing the limiting disc 26 on an operating platform 27, then selecting a bolt 28 with the head diameter larger than the diameter of the positioning hole and smaller than the fourth rotating shaft through hole 23 to fix the limiting disc 26 on the operating platform 27, and screwing the bolt 28 to ensure that the bottom edge of the head of the bolt 28 is tightly attached to the upper surface of the limiting disc 26; the limiting disc 26 can be fixedly connected with the operating platform 27 through the fixation of the bolt 28, the rotor core 1 is installed by means of the limiting disc 26, the lower core 5 is not required to be connected with the operating platform 27, the lower core 5 can be fixed, the lower core 5 is not required to be additionally connected with the operating platform 27 in an auxiliary mode, the connection and fixation of the lower core 5 and the operating platform 27 are achieved, and the smoothness of the surface of the rotor core 1 is guaranteed;
b. then the lower iron core 5 is placed on a limiting disc 26, the position of the lower iron core 5 is adjusted, the head of a bolt 28 is completely positioned inside a first rotating shaft through hole 15, then the lower surface of the lower iron core 5 is tightly attached to the upper surface of the limiting disc 26 through pressing from the top of the lower iron core 5, the first permanent magnet through groove 8 on the lower iron core 5 is adjusted to be aligned with an intubation tube installation groove 33 on the limiting disc 26, then a fixing ring 29 is encircled outside the lower iron core 5, the fixing ring 29 is tightened to enable the outer wall of the lower iron core 5 to be tightly attached to the fixing ring 29, a connecting rod 31 is penetrated through an installation hole 30 at the end part of the fixing ring 29, a locking piece 39 is penetrated through connecting holes 32 at two ends of the connecting rod 31 to achieve the limiting effect on the fixing ring 29, and finally the bottom of the fixing ring 29 and the; firstly, the lower iron core 5 is placed on the limiting disc 26, the mounting position of the lower iron core 5 is preliminarily determined, the first permanent magnet through groove 8 on the lower iron core 5 can be aligned with the cannula mounting groove 33 preset on the limiting disc 26, so that the cannula 34 can be exposed, the connection between the permanent magnet mold 35 and the cannula 34 in the later period is facilitated, the lower iron core 5 is fixedly surrounded from the outer side wall of the lower iron core 5 by utilizing the fixing ring 29, then the fixing ring 29 is fixedly welded with the limiting disc 26, the fixation of the position of the lower iron core 5 is indirectly realized, the position of the lower iron core 5 can be prevented from being changed when the middle iron core 6, the upper iron core 7 and the permanent magnet 37 are mounted, the mounting variable is reduced, and the mounting accuracy of the rotor iron core 1 is ensured;
2) mounting of the lower core 5 and the middle core 6:
a. firstly, placing the connecting column 3 on the lower iron core 5, aligning the side wall of the fourth rotating shaft through hole 23 of the connecting column 3 with the side wall of the first rotating shaft through hole 15 of the lower iron core 5, and welding the bottom of the connecting column 3 on the lower iron core 5; the connecting column 3 is aligned with the lower iron core 5, so that the fourth rotating shaft through hole 23 is aligned with the first rotating shaft through hole 15, and the rotating shaft of the motor can smoothly pass through the rotor iron core 1;
b. then, the middle iron core 6 is placed on the connecting column 3, the second internal thread 18 on the side wall of the second rotating shaft through hole 17 of the middle iron core 6 is connected with the external thread 25 on the connecting column 3, the middle iron core 6 rotates downwards along the connecting column 3 until the lower surface of the middle iron core 6 is in contact with the upper surface of the lower iron core 5, and the convex ring 10 on the lower iron core 5 is ensured to be positioned in the groove 9 on the lower surface of the middle iron core 6, namely the convex ring 10 cannot be seen through naked eye observation; the middle iron core 6 is rotatably arranged on the connecting column 3, so that the middle iron core 6 and the lower iron core 5 can be fixedly arranged, other auxiliary connecting parts are not needed between the middle iron core 6 and the lower iron core 5, and the middle iron core 6 and the upper iron core 7 can be more tightly connected through the clamping connection of the convex ring 10 and the groove 9;
c. then respectively inserting the prefabricated permanent magnet mold 35 into the insertion tube 34 arranged at the bottom of the limiting disc 26 from the upper part, pressing the permanent magnet mold 35 from the top of the permanent magnet mold 35 to enable the insertion tube 34 arranged in the insertion tube installation groove 33 to completely enter the insertion groove 36 at the bottom of the permanent magnet 37, and if the second permanent magnet through groove 11 blocks the connection between the permanent magnet mold 35 and the insertion tube 34, readjusting the position of the middle iron core 6 until the insertion tube 34 completely enters the insertion groove 36; the preset length of the insertion tube 34 is matched with the size of the slot 36 arranged at the bottom of the permanent magnet mold 35, if the insertion tube 34 completely enters the slot 36, it can be shown that the permanent magnet mold 35 is installed at a preset angle, and if the insertion tube 34 cannot completely enter the slot 36, it can be shown that the installation of the permanent magnet mold 35 is inclined, and the like, the permanent magnet mold 35 needs to be taken down for installation again, and the permanent magnet mold 35 can be used for checking the installation position of the middle iron core 6, so as to ensure that the installation of the middle iron core 6 is overlapped with the lower iron core 5;
d. finally, the permanent magnet mold 35 is taken down;
3) mounting of permanent magnet 37:
the permanent magnets 37 are sequentially placed into the second permanent magnet through grooves 11, so that the permanent magnets 37 are vertically placed upwards and the lower surfaces of the protrusions 38 of the permanent magnets 37 are in contact with the bottom of the permanent magnet lower mounting groove 12;
4) mounting and fixing of the upper core 7:
a. firstly, a third connecting rod 31 in the middle of an upper iron core 7 is punched and placed on the outer side of a connecting column 3, a third internal thread 21 moves downwards along an external thread 25 on the outer side of the connecting column 3, it is ensured that a bulge 38 at the upper end part of a permanent magnet 37 is positioned in a permanent magnet upper mounting groove 14, then the upper iron core 7 is rotated along the connecting column 3 until the upper iron core cannot rotate, namely, a third rotor wire slot 22 and a second rotor wire slot 19 below the upper iron core are required to be overlapped; the bulge 38 of the permanent magnet 37 is clamped between the permanent magnet upper mounting groove 14 and the permanent magnet lower mounting groove 12, so that the permanent magnet 37 is fixed between the upper iron core 7 and the middle iron core 6, and the top end of the permanent magnet 37 passes through the second permanent magnet through groove 11 and the third permanent magnet through groove 13 and is exposed outside the upper iron core 7;
b. the fixing nut 4 rotates and moves downwards along the connecting column 3, the first internal thread 24 is guaranteed to be connected with the external thread 25 on the connecting column 3, the fixing nut 4 is buckled by a rotating tool and rotates downwards along the direction of the external thread 25 until the fixing nut 4 cannot rotate, the upper surface of the fixing nut 4 is checked, and the upper surface of the fixing nut 4 is guaranteed not to be higher than the upper surface of the connecting column 3; the fixing nut 4 is fixed with the connecting column 3 from the top, so that the influence on the accuracy of the rotor core 1 caused by the looseness generated between the upper iron core 7, the middle iron core 6, the lower iron core 5 and the connecting column 3 in long-time use is avoided;
c. finally, the connecting seams among the upper iron core 7, the middle iron core 6 and the lower iron core 5 are sealed by glue, so that the firmness of the rotor iron core 1 is ensured, and the fixing ring 29 is taken down; the connecting joints of the three parts are sealed by glue, so that the smoothness of the surface of the rotor core 1 can be ensured.
Due to the adoption of the technical scheme, the invention has the following beneficial effects:
the rotor iron core 1 is divided into three layers, the connecting column 3 is arranged on the lower iron core 5, the middle iron core 6 and the upper iron core 7 are respectively and fixedly connected with the connecting column 3, the detachable connection between the lower iron core 5, the middle iron core 6 and the upper iron core 7 is realized, the outer diameters of the upper iron core 7, the middle iron core 6 and the lower iron core 5 are the same, the outer diameters of the three parts are superposed after the connection, the outer side surface of the rotor iron core 1 is smooth and flat, the connection between the middle iron core 6 and the lower iron core 5 is tighter through the design of the convex ring 10 and the groove 9, the permanent magnet lower mounting groove 12 and the permanent magnet upper mounting groove 14 can clamp the permanent magnet 37 with the bulge 38 in the middle part from the upper side and the lower side, the top of the permanent magnet 37 penetrates through the third permanent magnet penetrating groove 13 to be exposed on the surface of the upper iron core 7, the connection between the upper iron core 7 and the connecting, thereby making the connection of the permanent magnets 37 with the rotor core 1 firm.
The invention provides a technical scheme of a rotor iron core for a permanent magnet synchronous motor and an installation method thereof, wherein a traditional rotor iron core 1 is divided into three layers, and then a permanent magnet 37 is clamped between an upper iron core 7 and a middle iron core 6, so that the installation of the rotor iron core 1 and the permanent magnet 37 does not need to be additionally provided with a protective layer and is very convenient.
The above is only a specific embodiment of the present invention, but the technical features of the present invention are not limited thereto. Any simple variations, equivalent substitutions or modifications based on the present invention to achieve substantially the same technical effects are within the scope of the present invention.
Claims (7)
1. A rotor core for a permanent magnet synchronous motor comprises a rotor core, and is characterized in that: the rotor comprises a rotor core and a rotor core, and is characterized by further comprising a connecting structure, wherein the connecting structure comprises a connecting post and a fixing nut, the rotor core comprises a lower iron core, a middle iron core and an upper iron core, the outer diameter of the lower iron core, the outer diameter of the middle iron core and the outer diameter of the lower iron core are equal, a first permanent magnet through groove is formed in the lower iron core, the connecting post is fixedly welded in the middle of the lower iron core, the middle iron core is arranged above the lower iron core and sleeved on the connecting post, a groove is formed in the bottom of the middle iron core, a convex ring is arranged on the lower iron core and arranged in the groove, the upper iron core is arranged above the middle iron core and sleeved on the connecting post, a second permanent magnet through groove and a permanent magnet lower mounting groove are formed in the middle iron core, and the permanent magnet lower mounting groove is formed in the upper surface of the middle iron, the mounting groove encircles under the permanent magnet the outside that the second permanent magnet wore the groove, the degree of depth of mounting groove does under the permanent magnet half of well thickness unshakable in one's determination, it is provided with third permanent magnet on wearing groove and the permanent magnet on the iron core to go up the mounting groove setting and is in go up the lower surface unshakable in one's determination, the degree of depth of mounting groove does on the permanent magnet half of last thickness unshakable in one's determination, fixation nut fixed connection is in the top of spliced pole, the center of permanent magnet is equipped with the arch, the lower part of permanent magnet is located mounting groove under the permanent magnet, the upper portion of permanent magnet is located mounting groove on the permanent magnet, protruding joint is in mounting groove on the permanent magnet with between the mounting groove under the permanent magnet.
2. A rotor core for a permanent magnet synchronous motor according to claim 1, characterized in that: the middle of the lower iron core is provided with a first rotating shaft through hole, the outer side of the lower iron core is provided with a first rotor wire slot, and the first rotor wire slot is arranged on the outer side of the first permanent magnet through slot.
3. A rotor core for a permanent magnet synchronous motor according to claim 2, characterized in that: the middle of the middle iron core is provided with a second rotating shaft through hole, a second internal thread is arranged on the inner side wall of the second rotating shaft through hole, a second rotor wire slot is arranged on the outer side of the middle iron core and is arranged on the outer side of the second permanent magnet through slot, and the size of the second rotor wire slot is matched with that of the first rotor wire slot.
4. A rotor core for a permanent magnet synchronous motor according to claim 3, characterized in that: the middle part of the upper iron core is provided with a third rotating shaft through hole, a third internal thread is arranged on the inner side wall of the third rotating shaft through hole, a third rotor wire slot is arranged on the outer side of the upper iron core and is arranged on the outer side of the third permanent magnet through slot, and the size of the third rotor wire slot is matched with that of the second rotor wire slot.
5. A rotor core for a permanent magnet synchronous motor according to claim 1, characterized in that: and a fourth rotating shaft through hole is formed in the connecting column.
6. A rotor core for a permanent magnet synchronous machine according to claim 4, characterized in that: be provided with first internal thread on fixation nut's the inside wall, fixation nut's up end with the up end looks parallel and level of spliced pole.
7. A rotor core for a permanent magnet synchronous motor according to claim 6, characterized in that: the height of the connecting column is equal to the sum of the height of the rotor core and the height of the fixing nut, an external thread is arranged on the outer side wall of the connecting column, and the size of the external thread is matched with the first internal thread, the second internal thread and the third internal thread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910163387.5A CN109888949B (en) | 2019-03-05 | 2019-03-05 | Rotor core for permanent magnet synchronous motor and mounting method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910163387.5A CN109888949B (en) | 2019-03-05 | 2019-03-05 | Rotor core for permanent magnet synchronous motor and mounting method thereof |
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| Publication Number | Publication Date |
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| CN109888949A CN109888949A (en) | 2019-06-14 |
| CN109888949B true CN109888949B (en) | 2020-03-24 |
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| CN201910163387.5A Active CN109888949B (en) | 2019-03-05 | 2019-03-05 | Rotor core for permanent magnet synchronous motor and mounting method thereof |
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| JPH0425462U (en) * | 1990-06-19 | 1992-02-28 | ||
| JPH08107639A (en) * | 1994-08-10 | 1996-04-23 | Yaskawa Electric Corp | Rotor of permanent magnet type synchronous electric rotating machine |
| JP2001157395A (en) * | 1999-11-25 | 2001-06-08 | Mitsubishi Electric Corp | Magnet buried rotor, its manufacture method and forming jig |
| CN1373549A (en) * | 2001-02-28 | 2002-10-09 | 株式会社日立制作所 | Rotary motor and vehicle carring same |
| EP1786085A2 (en) * | 2005-11-15 | 2007-05-16 | Shin-Etsu Chemical Co., Ltd. | Permanent magnet rotating electric machine |
| CN202634109U (en) * | 2012-01-22 | 2012-12-26 | 浙江大学 | Sectional type PMSM rotor structure |
| CN206349826U (en) * | 2016-12-08 | 2017-07-21 | 泰信电机（天津）有限公司 | A kind of permagnetic synchronous motor |
| CN107026523A (en) * | 2016-02-01 | 2017-08-08 | 德昌电机(深圳)有限公司 | Monophase machine and its rotor |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20160112412A (en) * | 2015-03-19 | 2016-09-28 | 주식회사 고아정공 | Rotor comprising a rotor core and manufacturing method thereof |
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Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0425462U (en) * | 1990-06-19 | 1992-02-28 | ||
| JPH08107639A (en) * | 1994-08-10 | 1996-04-23 | Yaskawa Electric Corp | Rotor of permanent magnet type synchronous electric rotating machine |
| JP2001157395A (en) * | 1999-11-25 | 2001-06-08 | Mitsubishi Electric Corp | Magnet buried rotor, its manufacture method and forming jig |
| CN1373549A (en) * | 2001-02-28 | 2002-10-09 | 株式会社日立制作所 | Rotary motor and vehicle carring same |
| EP1786085A2 (en) * | 2005-11-15 | 2007-05-16 | Shin-Etsu Chemical Co., Ltd. | Permanent magnet rotating electric machine |
| CN202634109U (en) * | 2012-01-22 | 2012-12-26 | 浙江大学 | Sectional type PMSM rotor structure |
| CN107026523A (en) * | 2016-02-01 | 2017-08-08 | 德昌电机(深圳)有限公司 | Monophase machine and its rotor |
| CN206349826U (en) * | 2016-12-08 | 2017-07-21 | 泰信电机（天津）有限公司 | A kind of permagnetic synchronous motor |
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| Publication number | Publication date |
|---|---|
| CN109888949A (en) | 2019-06-14 |
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Denomination of invention: The invention relates to a rotor core for a permanent magnet synchronous motor and an installation method thereof Effective date of registration: 20211027 Granted publication date: 20200324 Pledgee: Shaoxing Bank Co.,Ltd. Shengzhou sub branch Pledgor: ZHEJIANG JIN YI SPECIAL MOTOR CO.,LTD. Registration number: Y2021330002062 |
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Date of cancellation: 20220421 Granted publication date: 20200324 Pledgee: Shaoxing Bank Co.,Ltd. Shengzhou sub branch Pledgor: ZHEJIANG JIN YI SPECIAL MOTOR CO.,LTD. Registration number: Y2021330002062 |
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Denomination of invention: Rotor core for permanent magnet synchronous motor and its installation method Effective date of registration: 20220927 Granted publication date: 20200324 Pledgee: Bank of China Limited Shengzhou sub branch Pledgor: ZHEJIANG JIN YI SPECIAL MOTOR CO.,LTD. Registration number: Y2022330002389 |