CN111245133B - Permanent magnet frequency conversion all-in-one machine - Google Patents

Abstract

The invention discloses a permanent magnet frequency conversion all-in-one machine, which comprises: the water cooling device comprises a shell, a stator, a rotor, a frequency conversion module and a water cooling plate, wherein the stator and the rotor are arranged in the shell, the rotor is inserted into the stator, and the water cooling plate is arranged between the frequency conversion module and the shell; the stator comprises a stator core and a winding, wherein the inner surface of the stator core is provided with a plurality of groove structures, the winding is arranged in the groove structures, the opening of each groove structure is also provided with a positioning inserting strip, and the positioning inserting strips abut against the winding; the rotor comprises a rotating shaft, a rotor iron core, a permanent magnet and a mounting bracket, wherein the mounting bracket is provided with a shaft hole, and the rotating shaft is mounted in the shaft hole; the rotor core is of a sleeve structure and is sleeved outside the mounting support. The weight of the permanent magnet frequency conversion all-in-one machine is reduced, and the use reliability is improved.

Description

Permanent magnet frequency conversion all-in-one machine

Technical Field

The invention relates to a motor, in particular to a permanent magnet frequency conversion all-in-one machine.

Background

The motor is a common electric appliance part in industrial production, wherein the permanent magnet frequency conversion all-in-one machine is widely applied to the industrial production due to high efficiency and small volume. The permanent magnet frequency conversion all-in-one machine generally comprises a stator and a rotor, wherein a winding coil is arranged on the stator, and a permanent magnet is arranged on the rotor. In the prior art, a rotor core of a rotor is generally of a solid structure, so that the permanent magnet frequency conversion integrated machine is heavy; meanwhile, the winding wound on the stator core in the stator is easy to fall off after long-time use; the invention aims to solve the technical problem of how to design a permanent magnet frequency conversion all-in-one machine which is light in weight and high in use reliability.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: the permanent magnet frequency conversion all-in-one machine is used for reducing the weight of the permanent magnet frequency conversion all-in-one machine and improving the use reliability.

The technical scheme provided by the invention is that the permanent magnet frequency conversion all-in-one machine comprises: the water cooling device comprises a shell, a stator, a rotor, a frequency conversion module and a water cooling plate, wherein the stator and the rotor are arranged in the shell, the rotor is inserted into the stator, and the water cooling plate is arranged between the frequency conversion module and the shell; the stator comprises a stator core and a winding, wherein the inner surface of the stator core is provided with a plurality of groove structures, the winding is arranged in the groove structures, the opening of each groove structure is also provided with a positioning inserting strip, and the positioning inserting strips abut against the winding; the rotor comprises a rotating shaft, a rotor iron core, a permanent magnet and a mounting bracket, wherein the mounting bracket is provided with a shaft hole, and the rotating shaft is mounted in the shaft hole; the rotor core is of a sleeve structure and is sleeved outside the mounting support.

Further, the stator core comprises a plurality of layers of first mounting pieces which are sequentially connected together, and a plurality of tooth structures are arranged on the inner circumference of each first mounting piece around the axis of the first mounting piece; the tooth structures located at the same circumferential position are sequentially stacked together along the axial direction of the first mounting piece to form a winding portion on which a cable of the winding is wound.

Furthermore, first installation piece includes a plurality of first arc pieces, and is a plurality of first arc piece docks together in proper order forms first installation piece.

Further, the two first mounting pieces which are abutted together abut against each other, wherein the first arc-shaped piece in one first mounting piece is abutted against the two first arc-shaped pieces which are abutted together in the other first mounting piece.

Furthermore, the first arc-shaped piece is provided with fastening holes, the fastening holes which are coaxially arranged and communicated with each other form fastening channels, double-headed bolts are inserted into the fastening channels, and fastening nuts are connected to the end parts of the double-headed bolts in a threaded manner.

Further, the installing support includes inner tube and urceolus, the urceolus cover is in the outside of inner tube, the urceolus with be provided with the backup pad between the inner tube, form in the inner tube the shaft hole, be provided with many location muscle on the outer wall of urceolus, rotor core's inner wall is provided with many constant head tanks, the location muscle is inserted in the constant head tank.

Furthermore, the rotor core comprises a plurality of layers of second mounting pieces which are sequentially connected together, a plurality of jacks are arranged on the second mounting pieces around the axis of the second mounting pieces, and the jacks which are coaxially arranged and mutually communicated form slots; the permanent magnets are in strip structures and are inserted into the corresponding slots.

Furthermore, the second installation piece includes a plurality of second arc pieces, and is a plurality of the second arc piece dock in proper order together and form the second installation piece, every be provided with at least one on the second arc piece the jack.

Further, the two second mounting pieces which are abutted together abut against each other, wherein the second arc-shaped piece in one second mounting piece is abutted against the two second arc-shaped pieces which are abutted together in the other second mounting piece.

Furthermore, a first through hole and a second through hole are formed in the second arc-shaped sheet, the first through hole is close to the outer edge of the arc-shaped sheet, and the second through hole is close to the inner edge of the arc-shaped sheet; the first through holes which are coaxially arranged and are mutually communicated form a first tensioning channel, the second through holes which are coaxially arranged and are mutually communicated form a second tensioning channel, the first tensioning rod is inserted into the corresponding first tensioning channel, two end parts of the first tensioning rod are in threaded connection with first locking nuts, the second tensioning rod is inserted into the corresponding first tensioning channel, and two end parts of the second tensioning rod are in threaded connection with second locking nuts.

Compared with the prior art, the invention has the advantages and positive effects that: the mounting bracket is of a bracket body structure, the weight of the mounting bracket is light, and the weight of the rotor core can be effectively reduced to reduce the weight of the permanent magnet frequency conversion all-in-one machine. And the positioning inserting strips are arranged in the slot structure openings of the stator core, are positioned at the outer sides of the windings and position the windings so as to prevent the windings from being separated out from the slot structure openings, and improve the reliability of the permanent magnet frequency conversion all-in-one machine.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a permanent magnet frequency conversion integrated machine according to the present invention;

FIG. 2 is a cross-sectional view of the permanent magnet frequency conversion all-in-one machine of the present invention;

FIG. 3 is an exploded view of the permanent magnet frequency conversion all-in-one machine of the present invention;

FIG. 4 is an exploded view of the stator of the present invention;

FIG. 5 is an enlarged view of a portion of area A of FIG. 4;

FIG. 6 is an exploded view of the stator core;

FIG. 7 is a schematic view of the structure of the rotor of the present invention;

FIG. 8 is a cross-sectional view of a rotor of the present invention;

FIG. 9 is an exploded view of the rotor of the present invention;

fig. 10 is an assembly view of two adjacent second mounting pieces.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1-3, the permanent magnet frequency conversion all-in-one machine of the embodiment includes a motor main body 100, a frequency conversion module 200, and a water cooling plate 300, wherein the motor main body 100 includes a stator 1, a rotor 2, and a housing 3, the stator 1 and the rotor 2 are installed in the housing 3, the frequency conversion module 200 is installed on the housing 3 through the water cooling plate 300, a water flow channel is formed in the water cooling plate 300, and cooling water flows into the water flow channel of the water cooling plate 300 to dissipate heat of the motor main body 100 and the frequency conversion module 200.

The following structural improvements of the stator 1 and the rotor 2 are described with reference to the drawings.

As for the stator 1, as shown in fig. 4 to 6, the stator 1 includes a stator core 11 and a winding 12; the inner surface of the stator core 11 is provided with a plurality of slot structures 110, the winding 12 is arranged in the slot structures 110, the opening of the slot structures 110 is further provided with a positioning insertion strip 13, and the positioning insertion strip 13 abuts against the winding 12. Specifically, for the winding 12, it is common to use a cable that is wound around the positioning core and is located in the slot structure 110. In the actual use process, the wound cable is loosened under the influence of the operation vibration of the permanent magnet frequency conversion all-in-one machine, and the positioning inserting strips 13 are arranged at the openings of the slot structures 110, so that the windings 12 are positioned and limited in the slot structures 110 by the positioning inserting strips 13. Thus, in the actual use process, even if the cable of the winding 12 is loosened due to the vibration generated by the permanent magnet frequency conversion all-in-one machine, the winding can be prevented from being separated from the opening of the slot structure 110 under the action of the positioning inserting strip 13, so that the use reliability is improved. And the winding quality improving winding 12 for the convenient and rapid winding is that the winding 12 is a flat copper wire wound on the winding part and adjacent flat copper wires are stacked together.

The cross section of the groove structure 110 is a trapezoid structure, and the cross section of the positioning insert 13 is also a trapezoid structure. In the actual assembly process, after the winding 12 is placed in the slot structure 110, the positioning slips 13 are inserted into the slot structure 110 and positioned outside the winding 12. Positioning the slip 13 will cause the winding 12 to compact in the slot structure 110. Preferably, a spacer 14 is further disposed in the slot structure 110, and the winding 12 is sandwiched between two spacers 14, so that the two spacers 14 can protect the winding 12 during the process of inserting the positioning insert 13 into the slot structure 110, thereby improving the assembly quality.

Further, in order to improve the assembly efficiency and accuracy of the stator core 11, the stator core 11 includes a plurality of layers of first mounting pieces 111 connected together in sequence, and an inner circumference of the first mounting pieces 111 is provided with a plurality of tooth structures 112 around an axis thereof; the tooth structures 112 located at the same circumferential position are stacked in order in the axial direction of the first mounting piece 111 to form winding portions, and a groove structure 110 is formed between two adjacent winding portions, on which the wire of the winding 12 is wound. Specifically, stator core 11 adopts the mode processing that the first installation piece 111 of multi-disc superposes together to form, and every first installation piece 111's structural dimension is the same, like this, alright with the stator core 11 of setting for suitable size and specification as required to, can guarantee that stator core 11's machined dimension keeps unanimous, with improvement packaging efficiency and precision. The tooth structure 112 extends towards the center of the first mounting piece 111, and a groove structure 110 with a trapezoidal cross section is formed between two adjacent winding portions.

In order to fasten the first mounting piece 111 in multiple layers, a plurality of fastening holes 113 are formed in the first mounting piece 111 along the outer circumferential direction, the plurality of fastening holes 113 coaxially arranged and communicating with each other form a fastening passage, a stud bolt 112 is inserted into the fastening passage, and a fastening nut (not shown) is screwed to an end portion of the stud bolt 112. Specifically, in the process of stacking multiple layers of first mounting pieces 111 together, each layer of first mounting piece 111 is correspondingly mounted on the stud bolt 112, the stud bolt 112 is correspondingly inserted into the fastening hole 113, and the stud bolt 112 further performs the assembling and positioning functions. Simultaneously, the outer periphery of first installation piece 111 still is provided with a plurality of location breach 114, and the collineation is arranged and a plurality of location breach 114 that communicate each other form positioning groove (not mark), positioning groove that the outer periphery of location iron core formed will the location iron core is installed in the in-process in the shell, it is corresponding, be provided with the gib block on the inner wall of shell, slide in the gib block and insert in the positioning groove. The stator core 11 can be conveniently and accurately assembled in the shell by configuring the positioning groove, so that the assembly precision and efficiency are improved.

Further, the first mounting piece 111 includes a plurality of first arc-shaped pieces 1111, the first arc-shaped pieces 1111 are sequentially butted together to form the first mounting piece 111, and each first arc-shaped piece 1111 is provided with a tooth structure 112 and a fastening hole 113. Specifically, first installation piece 111 adopts a plurality of first arc pieces 1111 to link together in proper order with cyclic annular trend, like this, alright reduce the machining dimension of the first installation piece 111 of individual layer, the effectual degree of difficulty that reduces processing. Preferably, for two first mounting pieces 111 abutting together, the first arc-shaped piece 1111 in one first mounting piece 111 abuts against the two first arc-shaped pieces 1111 butted together in the other first mounting piece 111. Specifically, the first arc-shaped pieces 1111 of the two adjacent layers of the first mounting pieces 111 are arranged in a staggered manner. The first arc piece 1111 of dislocation arrangement can be effectual increase in two-layer first installation piece 111 lean on the restriction constraint between the first arc piece 1111 together for each first arc piece 1111's atress is more even, and overall structure intensity is higher.

For the rotor 2. As shown in fig. 7 to 10, rotor 2 includes a rotating shaft 21, a rotor core 22, and a permanent magnet 23, and rotor core 22 is of a sleeve structure. In order to enable the permanent magnets 23 to be uniformly distributed on the rotor core 22 to obtain the optimal motor efficiency, a plurality of slots are formed in the rotor core 22 around the axis of the rotor core, the slots extend along the axis direction of the rotor core 22, the permanent magnets 23 are in a strip-shaped structure and are inserted into the corresponding slots, and the rotor core 22 is sleeved outside the rotating shaft 21. Specifically, the slots are uniformly distributed around the axis of the rotor core 22 near the outer circumference of the rotor core 22, and correspondingly, the permanent magnets 23 are inserted into each slot, so that the distance between each permanent magnet 23 and the axis of the rotor core 22 is the same, and higher motor efficiency can be obtained. And the slot is also provided with oppositely arranged backing plates 231, the permanent magnet 23 is clamped between the two backing plates 231, and the backing plates 231 can insulate and isolate the permanent magnet 23 to be installed in the slot.

Similarly, in order to effectively reduce the weight of the rotor 2, the rotor 2 further includes a mounting bracket 24, the mounting bracket 24 is provided with a shaft hole (not labeled), the rotating shaft 21 is installed in the shaft hole, and the rotor core 22 is sleeved outside the mounting bracket 24. Specifically, the mounting bracket 24 is adopted to assemble the rotating shaft 21 and the rotor core 22 together, so that the overall weight of the mounting bracket 24 is light, and the overall weight of the rotor core 22 can be effectively reduced. In order to facilitate the installation of the rotating shaft 21 into the shaft hole of the mounting bracket 24, a first key slot is provided on the rotating shaft 21, a second key slot is provided in the shaft hole, the rotating shaft 21 is connected with the mounting bracket 24 through a key 211, and the key 211 is located in the first key slot and the second key slot.

The mounting bracket 24 includes an inner cylinder 242 and an outer cylinder 241, the outer cylinder 241 is sleeved outside the inner cylinder 242, a support plate 243 is disposed between the outer cylinder 241 and the inner cylinder 242, and the inner cylinder 242 has the shaft hole. Specifically, the mounting bracket 24 is formed by adopting an inner cylinder and an outer cylinder, so that the assembly requirements of the rotating shaft 21 and the rotor core 22 can be better met, and the rotor core 22 and the rotating shaft 21 can be arranged coaxially during assembly as long as the inner cylinder 242 and the outer cylinder 241 are ensured to be arranged coaxially during the machining process, so that the assembly difficulty is reduced. In order to improve the connection reliability between the inner cylinder 242 and the outer cylinder 241, the support plate 243 includes an annular plate that is fitted over the inner cylinder 242 and disposed between the inner cylinder 242 and the outer cylinder 241, and a rib that extends along the axis of the inner cylinder 242 and is disposed between the inner cylinder 242 and the outer cylinder 241.

Further, in order to improve the assembly efficiency and accuracy of rotor core 22, rotor core 22 includes a plurality of layers of second mounting pieces 221 connected together in sequence, and a plurality of insertion holes 222 are provided on second mounting pieces 221 around the axis thereof, and a plurality of insertion holes coaxially arranged and communicated with each other form the insertion slot. Specifically, rotor core 22 is processed in a manner that a plurality of second mounting pieces 221 are stacked together, and the structural dimension of each second mounting piece 221 is the same, so that rotor core 22 with a suitable dimension can be set as required, and the processing dimension of rotor core 22 can be kept consistent to improve the assembly efficiency and precision. The insertion holes formed by the second mounting pieces 221 form insertion slots for inserting the permanent magnets 23 after the plurality of layers of second mounting pieces 221 are assembled. And the insertion holes are close to the outer circumferential ring of the second mounting piece 221 so that the permanent magnets 23 can be closer to the stator 1.

Further, the second mounting piece 221 includes a plurality of second arc-shaped pieces 2211, the plurality of second arc-shaped pieces 2211 are sequentially butted together to form the second mounting piece 221, and each second arc-shaped piece 2211 is provided with at least one insertion hole. Specifically, the plurality of second arc-shaped pieces 2211 are sequentially butted together to form the second mounting piece 221, so that the machining size of the single-layer second mounting piece 221 can be reduced, and the machining difficulty is effectively reduced. Preferably, for two second mounting pieces 221 abutting together, the second arc-shaped piece 2211 in one second mounting piece 221 abuts against the two second arc-shaped pieces 2211 abutting together in the other second mounting piece 221. Specifically, the second arc-shaped pieces 2211 in two adjacent layers of the second mounting pieces 221 are arranged in a staggered manner. The second arc-shaped pieces 2211 arranged in a staggered mode can effectively increase the restriction and constraint between the second arc-shaped pieces 2211 attached together in the two layers of second installation pieces 221, so that the stress of each second arc-shaped piece 2211 is more uniform, and the overall structural strength is higher.

In order to improve the assembling reliability between the second mounting pieces 221, the rotor core 22 further includes a first tension rod 25; the second mounting piece 221 is further provided with a first through hole 223, and the first through hole 223 is close to the outer periphery of the second mounting piece 221 and is located between two adjacent insertion holes; the plurality of first through holes 223 coaxially arranged and communicating with each other form a first tightening passage in which the first tightening rod 25 is inserted, and both end portions of the first tightening rod 25 are threadedly connected with first locking nuts. Meanwhile, the rotor core 22 further includes a second tension bar 26; the second mounting piece 221 is further provided with a second through hole 224, and the second through hole 224 is close to the inner circumference of the second mounting piece 221; the plurality of second through holes 224, which are coaxially arranged and communicate with each other, form a second tightening passage, in which the second tightening rod 26 is inserted, and both end portions of the second tightening rod 26 are threadedly connected with second lock nuts. Specifically, in the process of assembling the plurality of second mounting pieces 221, the second mounting pieces 221 are mounted on the first tension bar 25 and the second tension bar 26 through the first through hole 223 and the second through hole 224, and the two tension bars further perform the assembling and positioning functions. Preferably, the rotor core 22 is provided at both ends thereof with first pressing rings 27, the first pressing rings 27 block the insertion slots, and the first tightening rods 25 sandwich the second mounting pieces 221 between the two first pressing rings 27.

Further, a plurality of positioning ribs 244 are provided on an outer wall of the outer cylinder 241, and a plurality of positioning grooves are provided on an inner wall of the rotor core 22, in which the positioning ribs 244 are inserted. Specifically, the positioning groove is formed by arranging the notch structure 225 on the inner ring of the second mounting plate, and the positioning rib 244 is matched with the positioning groove, so that the rotor core 22 can be firmly and reliably mounted on the mounting bracket 24. In order to improve the connection reliability, the positioning groove is of a dovetail structure, and the cross section of the positioning rib 244 is also of a dovetail structure. Preferably, the outer cylinder 241 is provided with a plurality of mounting holes (not shown), and the positioning rib 244 is provided with a plurality of screw holes (not labeled), into which bolts are inserted from the outer cylinder 241 and screwed. Specifically, in the process of assembling the rotor core 22 to the mounting bracket 24, the positioning ribs 244 are loosened first, so that the positioning ribs 244 can be smoothly loaded into the corresponding positioning grooves. Finally, the bolts are tightened so that the rotor core 22 is fastened to the mounting bracket 24. Further, second pressing rings 28 are provided at both end portions of the rotor core 22, respectively, and the positioning groove is shielded by the second pressing rings 28, and the two second pressing rings 28 are tightened to each other by the second tightening rod 26.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims (4)

1. A permanent magnetism frequency conversion all-in-one machine which characterized in that includes: the water cooling device comprises a shell, a stator, a rotor, a frequency conversion module and a water cooling plate, wherein the stator and the rotor are arranged in the shell, the rotor is inserted into the stator, and the water cooling plate is arranged between the frequency conversion module and the shell;

the stator comprises a stator core and a winding, wherein the inner surface of the stator core is provided with a plurality of groove structures, the winding is arranged in the groove structures, the opening of each groove structure is also provided with a positioning inserting strip, and the positioning inserting strips abut against the winding;

the rotor comprises a rotating shaft, a rotor iron core, a permanent magnet and a mounting bracket, wherein the mounting bracket is provided with a shaft hole, and the rotating shaft is mounted in the shaft hole; the rotor iron core is of a sleeve structure and is sleeved outside the mounting bracket;

the stator core comprises a plurality of layers of first mounting sheets which are sequentially connected together, and a plurality of tooth structures are arranged on the inner circumference of each first mounting sheet around the axis of the first mounting sheet; the tooth structures located at the same circumferential position are sequentially stacked together along the axial direction of the first mounting pieces to form a winding part, a cable of the winding is wound on the winding part, the first mounting pieces comprise a plurality of first arc-shaped pieces, the first arc-shaped pieces are sequentially connected together in an annular direction to form the first mounting pieces, and the two first mounting pieces are attached together, wherein the first arc-shaped piece in one first mounting piece is attached to the two first arc-shaped pieces butted together in the other first mounting piece;

in addition, the rotor core comprises a plurality of layers of second mounting pieces which are sequentially connected together, a plurality of jacks are arranged on the second mounting pieces around the axis of the second mounting pieces, and a plurality of jacks which are coaxially arranged and are mutually communicated form slots; the permanent magnet is bar-shaped structure and inserts and corresponds in the slot, the second installation piece includes a plurality of second arc pieces, and is a plurality of the second arc piece links together in proper order with cyclic annular trend and forms the second installation piece, every be provided with at least one on the second arc piece the jack pastes two of pasting together the second installation piece, one of them in the second installation piece the second arc piece with another two of butt joint together in the second installation piece the second arc piece pastes and pastes together.

2. The permanent magnet frequency conversion all-in-one machine is characterized in that fastening holes are formed in the first arc-shaped sheet, a plurality of fastening holes which are coaxially arranged and communicated with each other form fastening channels, double-headed bolts are inserted into the fastening channels, and fastening nuts are connected to the end portions of the double-headed bolts in a threaded mode.

3. The permanent magnet frequency conversion all-in-one machine according to claim 1, wherein the mounting bracket comprises an inner cylinder and an outer cylinder, the outer cylinder is sleeved outside the inner cylinder, a support plate is arranged between the outer cylinder and the inner cylinder, the shaft hole is formed in the inner cylinder, a plurality of positioning ribs are arranged on the outer wall of the outer cylinder, a plurality of positioning grooves are arranged on the inner wall of the rotor core, and the positioning ribs are inserted in the positioning grooves.

4. The permanent magnet frequency conversion all-in-one machine is characterized in that a first through hole and a second through hole are formed in the second arc-shaped piece, the first through hole is close to the outer edge of the arc-shaped piece, and the second through hole is close to the inner edge of the arc-shaped piece; the first through holes which are coaxially arranged and are mutually communicated form a first tensioning channel, the second through holes which are coaxially arranged and are mutually communicated form a second tensioning channel, the first tensioning rod is inserted into the corresponding first tensioning channel, two end parts of the first tensioning rod are in threaded connection with first locking nuts, the second tensioning rod is inserted into the corresponding first tensioning channel, and two end parts of the second tensioning rod are in threaded connection with second locking nuts.

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