CN108679085B - Radial stator core structure, bearing stator and hybrid radial magnetic suspension bearing - Google Patents
Radial stator core structure, bearing stator and hybrid radial magnetic suspension bearing Download PDFInfo
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- CN108679085B CN108679085B CN201810612419.0A CN201810612419A CN108679085B CN 108679085 B CN108679085 B CN 108679085B CN 201810612419 A CN201810612419 A CN 201810612419A CN 108679085 B CN108679085 B CN 108679085B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C32/00—Bearings not otherwise provided for
- F16C32/04—Bearings not otherwise provided for using magnetic or electric supporting means
- F16C32/0406—Magnetic bearings
- F16C32/044—Active magnetic bearings
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- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Magnetic Bearings And Hydrostatic Bearings (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
The application provides a radial stator core structure which comprises a radial stator core and a radial ring which are connected together, wherein a winding groove is formed in the inner ring of the radial stator core, a convex part corresponding to the winding groove is arranged on the outer circumferential wall of the radial stator core, and a groove part in transition fit with the convex part is arranged on the radial ring. The application also provides a hybrid radial magnetic suspension bearing, which comprises a rotor and the bearing stator, wherein the rotor is coaxially arranged in the bearing stator. Compared with the prior art, the magnetic conduction area of the radial stator core is increased under the condition that the external dimension is not increased, and the problem that the magnetic saturation is easy to reach at the winding groove of the radial stator core in the prior art is solved, so that the electromagnetic utilization rate and the bearing capacity of the bearing are improved, and the structure of the magnetic conduction magnetic induction type bearing can optimize the assembly process, so that the assembly success rate and the product qualification rate are improved.
Description
Technical Field
The application relates to the technical field of bearings, in particular to a radial stator core structure, a bearing stator and a hybrid radial magnetic suspension bearing.
Background
The magnetic suspension bearing is a high-performance electromechanical integrated bearing which stably suspends a supported member in a space by utilizing electromagnetic force and enables no mechanical contact between the supported member and the supported member. The combined radial magnetic suspension bearing system is formed on the basis of an active magnetic bearing, a passive magnetic bearing and other auxiliary supporting and stabilizing structures, and utilizes the magnetic field generated by a permanent magnet to replace the static bias magnetic field of an electromagnet, so that the ampere-turns number of the electromagnet can be obviously reduced, the volume of the magnetic bearing is reduced, the power consumption is reduced and the bearing capacity is improved.
When the existing hybrid radial magnetic suspension bearing is manufactured and assembled, radial winding coils are wound on pole posts of a radial stator core to form a radial stator assembly, then the radial stator assembly is installed in a radial ring, and the outer ring of the radial stator core is connected with the inner ring of the radial ring through interference fit. Because the radial stator core and the radial ring are connected by adopting interference fit, the radial ring is heated by utilizing the thermal expansion property of metal when the hybrid radial magnetic suspension bearing in the prior art is assembled, and the radial stator core can be smoothly arranged in the radial ring. When the assembly is completed, the cooling retraction amount of the radial ring is not completely equal to the thermal expansion amount of the radial ring after the radial ring is completely cooled, the size of the outer ring of the radial ring is larger than that of the original radial ring due to the interaction force between the radial stator core and the radial ring, the size of the inner ring of the radial stator core is smaller, and meanwhile, the phenomena of deformation and the like after the assembly of the parts is completed can be caused due to uneven heating or structural defects of the parts, so that the size precision of the hybrid radial magnetic suspension bearing is affected. In addition, insufficient heating of the radial ring may result in hot-set failure, resulting in part scrap, and additional production costs.
From electromagnetic analysis, when the hybrid radial magnetic suspension bearing in the prior art works, the winding groove is extremely easy to reach magnetic saturation, and at the moment, the electromagnetic field of the hybrid radial magnetic suspension bearing is not correspondingly increased due to the increase of working current, but the heating power consumption of a winding coil is increased, and the electromagnetic utilization rate and the electromagnetic efficiency of the magnetic bearing are lower. When the bearing capacity of the bearing needs to be improved, the ampere-turns of the magnetic bearing needs to be correspondingly improved, and the volume of the magnetic bearing is further increased.
Accordingly, the present inventors have found that the prior art has at least the following technical problems:
1. the radial ring and the radial stator core in the prior art are assembled by heat, so that the assembly difficulty is high and the assembly efficiency is low;
2. in the hot assembly process of the radial ring and the radial stator core in the prior art, the hot assembly failure is easily caused by insufficient heating of parts or environmental influence, the product qualification rate is low, and the production cost is high;
3. in the prior art, during the hot assembly process of the radial ring and the radial stator core, the cooling retraction amount of the radial ring is difficult to accurately control, and the precision after installation cannot be ensured;
4. in the prior art, the magnetic saturation is easy to be achieved at the winding groove of the radial stator core, and the electromagnetic utilization rate and the bearing capacity of the bearing are greatly limited.
Disclosure of Invention
One of the purposes of the application is to provide a radial stator core structure, a bearing stator and a hybrid radial magnetic suspension bearing, which solve the technical problem that a winding groove is easy to reach magnetic saturation in the prior art.
The technical effects that can be produced by the preferred technical solutions of the present application are described in detail below.
In order to achieve the above object, the present application provides the following technical solutions:
the application provides a radial stator core structure, which comprises a radial stator core and a radial ring which are connected together, wherein a winding groove is formed in the inner ring of the radial stator core, a convex part corresponding to the winding groove is arranged on the outer circumferential wall of the radial stator core, and a groove part in transition fit with the convex part is arranged on the radial ring.
As preferable: the groove part comprises two side walls which are oppositely arranged and a bottom wall connected with the two side walls, and an opening part for the convex part to be clamped in is formed at the position, away from the bottom wall, of the groove part along the axial direction of the radial ring.
As preferable: one end face of the convex part is clung to the bottom wall.
As preferable: the groove part is of a dovetail groove structure, and the convex part is of a dovetail tenon structure.
As preferable: both side walls of the groove portion are perpendicular to the bottom wall, or both side walls of the groove portion are at an obtuse angle to each other with the bottom wall, so that the groove width L of the groove portion is gradually reduced from the opening portion to the bottom wall in the axial direction of the radial ring.
As preferable: the two end surfaces of the convex part are respectively flush with the two end surfaces of the radial stator core.
As preferable: the convex part is provided with an arc-shaped outer wall coaxial with the radial stator core, and the diameter of the arc-shaped outer wall is equal to the outer diameter of the radial ring.
As preferable: the inner ring of the radial stator core is provided with polar columns distributed in a circumferential array and used for winding coils, one winding groove is arranged between every two adjacent polar columns, the number of the protruding parts on the radial stator core is equal to that of the winding grooves, and the positions of each protruding part are in one-to-one correspondence with the positions of each winding groove.
As preferable: the radial stator core and the radial ring are fixedly connected together through a connecting piece penetrating into the radial stator core and the radial ring.
As preferable: the connecting piece is a screw or a bolt which penetrates through the radial ring and is screwed into the radial stator core.
As preferable: threaded holes are formed in the outer circumferential wall of the radial stator core between every two adjacent protruding portions, the threaded holes are used for allowing the screws or the bolts to be screwed in, countersunk through holes corresponding to the threaded holes are formed in the radial rings between every two adjacent groove portions, and the countersunk through holes are used for allowing the screws or the bolts to pass through and accommodating the heads of the screws or the bolts after the screws or the bolts are screwed into the threaded holes.
As preferable: each threaded hole corresponds to one pole, and the axis of each threaded hole is collinear with the central line of the corresponding pole.
The bearing stator provided by the application comprises the radial stator core structure.
Further: the radial ring of the radial stator core structure is sequentially connected with magnetic steel and a magnetic conduction ring, and the magnetic steel is annular magnetic steel or a segmented fan-shaped magnetic steel component.
The application provides a hybrid radial magnetic suspension bearing, which comprises a rotor and any one of the bearing stators, wherein the rotor is coaxially arranged in the bearing stators.
The beneficial effects of the application are as follows: the application sets up the protruding part corresponding to wire winding groove on the outer circumference wall of the radial stator core, set up the trough part cooperating with protruding part on the radial ring, make the application compared with the prior art, under the condition of not increasing the structural overall dimension of the radial stator core, the magnetic conduction area of wire winding groove of the radial stator core is increased, have solved the problem that the wire winding groove of the radial stator core of the prior art is apt to reach the magnetic saturation, thus make electromagnetic utilization rate and bearing capacity of the bearing improved.
In addition, through the mutually matched structure of the convex part and the groove part, the application can realize effective positioning in the assembly process so as to improve the success rate of assembly and the product qualification rate, and effectively reduce the production cost of assembly; the application can adopt the connecting piece to carry out cold assembly, the radial ring is not required to be heated during assembly, the problems of high assembly difficulty, low assembly efficiency and the like existing in the existing hot assembly mode can be effectively avoided, and the size of parts is kept unchanged during assembly, so that the installation accuracy is easier to control.
Drawings
In order to more clearly illustrate the embodiments of the application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic structural view of a radial stator core structure according to an embodiment of the present application;
fig. 2 is a schematic structural view of a radial stator core according to an embodiment of the present application;
FIG. 3 is a schematic view of a radial ring in an embodiment of the application;
FIG. 4 is a schematic view of the structure of an unconnected radial stator core and radial ring in an embodiment of the application;
FIG. 5 is a schematic illustration of another construction of an unconnected radial stator core and radial ring in an embodiment of the application;
FIG. 6 is a cross-sectional view of a bearing stator according to an embodiment of the present application;
FIG. 7 is a left side view of a bearing stator according to an embodiment of the present application;
FIG. 8 is an exploded view of a bearing stator according to an embodiment of the present application;
fig. 9 is a diagram showing the electromagnetic simulation cloud image comparing effect of a prior art bearing stator and a bearing stator according to an embodiment of the present application.
In the figure: 1. a coil; 2. a radial stator core; 21. a convex portion; 22. a receiving groove; 23. a pole; 24. a wire winding groove; 25. a threaded hole; 3. a radial ring; 31. a groove portion; 311. an opening portion; 32. a clamping block part; 33. a countersunk through hole; 34. a bottom wall; 4. annular magnetic steel; 5. a magnetic conductive ring; 6. and (5) a screw.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be described in detail below. It will be apparent that the described embodiments are only some, but not all, embodiments of the application.
Thus, the following detailed description of the embodiments of the application, as presented in the figures, is not intended to limit the scope of the application, as claimed, but is merely representative of selected embodiments of the application. All other embodiments, which can be made by those skilled in the art without making any inventive effort, are intended to be within the scope of the present application, based on the examples herein.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the present application, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art.
As shown in fig. 1, an embodiment of the present application provides a radial stator core structure, which includes a radial stator core 2 and a radial ring 3, wherein the radial stator core 2 and the radial ring 3 are fixedly connected together by a connecting piece.
As shown in fig. 2, the inner ring of the radial stator core 2 has a winding groove 24, and the outer circumferential wall of the radial stator core 2 is integrally provided with a convex portion 21 corresponding to the winding groove 24. As shown in fig. 3, the radial ring 3 is provided with a groove 31 which is in transition engagement with the projection 21.
As an alternative or preferred embodiment, as shown in fig. 2, the inner ring of the radial stator core 2 has poles 23 distributed in a circumferential array for winding the coil 1, with a winding slot 24 between every two adjacent poles 23. The number of the protrusions 21 on the radial stator core 2 is equal to the number of the winding grooves 24, and the position of each protrusion 21 corresponds to the position of each winding groove 24 one by one. After the coils 1 are wound on all the pole posts 23, the design of the convex parts 21 of the radial stator core 2 increases the magnetic conduction area of the core, so that the magnetic saturation problem at the winding groove 24 can be remarkably improved, and the electromagnetic utilization rate and the bearing capacity can be improved.
The number of poles 23 on the radial stator core 2 depends on the number of actually required wound coils 1. The present embodiment is described taking the radial stator core 2 provided with four poles 23 (i.e., four coils 1 wound).
The radial ring and the radial stator core of the magnetic suspension bearing are assembled in an interference fit manner by adopting the inner circumferential wall of the radial ring and the outer circumferential wall of the radial stator core, so that the electromagnetic analysis is carried out, and the magnetic saturation is easy to achieve at the winding groove.
Fig. 9 is a diagram showing the comparative effect of electromagnetic simulation cloud pictures of the prior art and the application with the same bearing size, coil 1 distribution number and coil 1 turns, and the same working current is introduced, and can be intuitively seen from the diagram:
the prior art electromagnetic simulation cloud shown in fig. 9a has reached full magnetic saturation at the wire slots, and further increasing the current will not increase its electromagnetic field, but will instead increase the heat dissipation of the coil 1.
The magnetic saturation condition of the wire slot in the electromagnetic simulation cloud image of the application shown in fig. 9b is greatly improved compared with that of the wire slot in fig. 9a, and the electromagnetic field can be increased by continuously increasing the current, so that the electromagnetic utilization rate is improved.
Alternatively or in a preferred embodiment, the connection is a screw 6 or a bolt screwed into the radial stator core 2 through the radial ring 3. Specifically, a threaded hole 25 is provided in the radial stator core 2, a through hole is provided in the radial ring 3, and a screw 6 or a bolt is screwed into the threaded hole 25 through the through hole to achieve connection between the radial ring 3 and the radial stator core 2. The through holes are preferably countersunk through holes 33 for receiving the heads of the screws 6 or bolts. In the process of assembling the radial ring 3 and the radial stator core 2, heating is not needed, so that the assembly is simpler and quicker, parts cannot deform, and the assembled precision is easier to ensure.
The convex part 21 and the groove part 31 are mutually buckled to form a positioning structure, and the positions of the convex part 21 and the groove part are better positioned in the assembly process of the radial ring 3 and the radial stator core 2, so that the threaded holes 25 on the radial stator core 2 and the through holes on the radial ring 3 can be aligned before the screws 6 or bolts are installed.
As an alternative or preferred embodiment, as shown in fig. 3, the groove 31 includes two side walls disposed opposite each other and a bottom wall 34 connected to the two side walls. As shown in fig. 4 and 5, in order to facilitate the attachment between the protruding portion 21 and the groove portion 31, the groove portion 31 is formed with an opening portion 311 into which the protruding portion 21 is caught at a position apart from the bottom wall 34 in the axial direction of the radial ring 3.
Specifically, the radial ring 3 includes two end surfaces, an inner circumferential wall and an outer circumferential wall extending between the two end surfaces, both end surfaces of the radial ring 3 being perpendicular to the axis of the radial ring 3. The groove 31 is formed by axially recessing one of the end surfaces of the radial ring 3.
As an alternative or preferred embodiment, the protruding portion 21 has two end faces distributed in the axial direction of the radial stator core 2, and two side faces and one top face extending between the two end faces, the two side faces being located on opposite sides of the top face, respectively. One of the end surfaces of the protruding portion 21 is in close contact with the bottom wall 34.
The bottom wall 34 is used to determine whether the position of the protruding portion 21 and the groove portion 31 in the axial direction is completely in place during the assembly of the radial ring 3 and the radial stator core 2. After assembly, the bottom wall 34 is in close proximity to one of the end faces of the boss 21, enabling accurate axial positioning of the boss 21.
The radial ring 3 may be manufactured by a conventional metal working method, in which an annular radial ring 3 blank is first manufactured, and then a groove 31 is secondarily manufactured on the annular radial ring 3 blank; the radial ring 3 can also be formed by one-step processing in a casting, powder metallurgy and other modes. The end surface of the radial ring 3 far from the mouth 311 is used for connecting the magnetic steel.
Alternatively or in a preferred embodiment, the groove portion 31 is a dovetail groove structure, and the length of the dovetail groove structure extends in the axial direction of the radial ring 3, i.e., the distance between the two side walls of the groove portion 31 gradually decreases inward in the radial direction of the radial ring 3. As shown in FIG. 2, the protrusion 21 is a dovetail structure. After the radial ring 3 and the radial stator core 2 are assembled, the convex part 21 and the groove part 31 are matched, so that the radial ring 3 and the radial stator core 2 can be positioned in the circumferential direction, and the radial ring 3 and the radial stator core 2 can be positioned in the radial direction. The positioning of the radial ring 3 and the radial stator core 2 in the axial direction can also be achieved by mounting connectors.
As an alternative or preferred embodiment, as shown in fig. 4, both side walls of the groove portion 31 are perpendicular to the bottom wall 34, so that the groove width L of the groove portion 31 is kept uniform from the opening portion 311 to the bottom wall 34 in the axial direction of the radial ring 3. This ensures that the protrusion 21 is magnetically conductive more uniformly.
As an alternative or preferably, as shown in fig. 5, both side walls of the groove portion 31 are at an obtuse angle to the bottom wall 34, so that the groove width L of the groove portion 31 gradually decreases from the opening portion 311 to the bottom wall 34 in the axial direction of the radial ring 3. The convex portion 21 is provided in a shape conforming to the groove portion 31, that is, the width of the convex portion 21 gradually decreases from one end to the other end. At the time of mounting, the small end of the protruding portion 21 is inserted toward the opening 311 of the groove 31 until the end face of the small end of the protruding portion 21 is bonded to the bottom wall 34 of the groove 31, at which time both side faces of the protruding portion 21 are bonded to both side faces of the groove 31 at the same time. This structure can make the assembly and disassembly between the radial ring 3 and the radial stator core 2 easier.
The two end surfaces of the convex portion 21 are flush with the two end surfaces of the radial stator core 2, respectively, and after the convex portion 21 is completely fitted with the groove portion 31, one end surface of the convex portion 21 is in close contact with the bottom wall 34 of the groove portion 31, and the other end surface is flush with the other end surface of the radial ring 3. This ensures a sufficient connection strength between the radial ring 3 and the radial stator core 2.
The outer diameter of the radial ring 3 is larger than or equal to the outer diameter of the radial stator core 2, and the overall outer contour of the radial ring 3 and the radial stator core 2 is cylindrical after being assembled together, so that the hybrid radial suspension bearing cannot interfere when being installed in other mechanisms.
The diameter of the outer circumferential wall of the radial stator core 2 is equal to the diameter of the inner circumferential wall of the radial ring 3, and both side walls of the groove 31 are connected with the inner circumferential wall of the radial ring 3, i.e., the groove 31 penetrates the inner circumferential wall of the radial ring 3 along the radial direction of the radial ring 3 at the same time, and when assembled, the edge of the intersection of both side walls of the groove 31 and the inner circumferential wall of the radial ring 3 can form positioning with the outer circumferential wall of the radial stator core 2.
As an alternative or preferred embodiment, as shown in fig. 7, the convex portion 21 has an arc-shaped outer wall coaxial with the radial stator core 2, i.e., a top surface of the convex portion 21, the arc-shaped outer wall having a diameter equal to the outer diameter of the radial ring 3, and both side walls of the groove portion 31 are respectively joined to the inner circumferential wall and the outer circumferential wall of the radial ring 3, i.e., the groove portion 31 penetrates both the inner circumferential wall and the outer circumferential wall of the radial ring 3 in the radial direction of the radial ring 3. The projection 21 thus has the same thickness as the radial ring 3, which makes its structural strength higher and also makes the groove 31 easier to machine, the projection 21 and the groove 31 being easier to form into engagement.
As an alternative or preferred embodiment, as shown in fig. 2, threaded holes 25 are provided on the outer circumferential wall of the radial stator core 2 between each two adjacent projections 21 for screwing in the screws 6 or bolts. Specifically, a receiving groove 22 is formed between each two adjacent convex portions 21, the opposite side surfaces of the adjacent convex portions 21 are two side walls of the receiving groove 22 therebetween, and the outer circumferential wall of the radial stator core 2 located between the adjacent convex portions 21 is a bottom surface of the receiving groove 22. Each of the receiving grooves 22 has a screw hole 25 therein, and each screw hole 25 is located at the center of the bottom surface of the receiving groove 22 in which it is located.
As shown in fig. 3, the radial ring 3 between each two adjacent groove portions 31 is provided with a countersunk through hole 33 corresponding to the screw hole 25 for passing the screw 6 or bolt and accommodating the head of the screw 6 or bolt after the screw 6 or bolt is screwed into the screw hole 25. Specifically, the radial ring 3 between every two adjacent groove portions 31 forms a clamping block portion 32, the clamping block portions 32 are matched with the accommodating grooves 22 in a one-to-one correspondence, each clamping block portion 32 is provided with a countersunk through hole 33 corresponding to the threaded hole 25 in the corresponding accommodating groove 22, and each countersunk through hole 33 is located in the center of the corresponding clamping block portion 32.
The engagement between the protruding portion 21 and the groove portion 31 is made at the same time as the engagement between the accommodating groove 22 and the latch portion 32. The matching between the radial stator core 2 and the radial ring 3 can be ensured to be tight by the concave-convex dovetail groove structure of the convex part 21 and the groove part 31, and the radial and circumferential positioning between the radial stator core 2 and the radial ring 3 can be realized. The radial stator core 2 and the radial ring 3 sequentially pass through the corresponding countersunk through holes 33 and the corresponding threaded holes 25 through the bolts 6 or bolts to form axial positioning, so that the vibration anti-loose effect can be achieved, and the reliability of part connection is ensured.
As an alternative or preferred embodiment, each threaded hole 25 corresponds to one pole 23, and the axis of each threaded hole 25 is collinear with the centerline of the corresponding pole 23. Thus, more accurate processing can be realized to ensure more accurate assembly and positioning.
As an alternative embodiment, the connector may also employ rivets. When the rivet is used as the connecting member, the threaded hole 25 is replaced by a rivet hole, and the countersunk through hole 33 is adapted to the head size of the rivet so as to accommodate the head of the rivet, thereby preventing the head of the rivet from protruding beyond the outer wall of the protruding portion 21.
As shown in fig. 6 to 8, the present application further provides a bearing stator, which includes the above-mentioned hybrid radial stator core structure.
As an alternative or preferred embodiment, the radial ring 3 of the radial stator core structure is sequentially connected with magnetic steel and a magnetic conduction ring 5, and the magnetic steel can be, but is not limited to, the following two structures:
first, the magnet steel is annular magnet steel 4, and the inside and outside diameter sizes of annular magnet steel 4 are the same with the inside and outside diameter sizes of radial ring 3 respectively, and annular magnet steel 4 forms coaxial coupling with radial ring 3 and magnetic conduction ring 5 through magnetic force adsorption.
The second type, the magnet steel is the fan-shaped magnet steel assembly of the blocking type, the fan-shaped magnet steel assembly of the blocking type is by the size identical and is the fan-shaped magnet steel that the circumference array distributes, the inside and outside diameter dimension of the fan-shaped magnet steel assembly of the blocking type is identical with the inside and outside diameter dimension of the radial ring 3, form coaxial coupling between the fan-shaped magnet steel assembly of the blocking type and radial ring 3 and magnetic conduction ring 5 through the magnetic force absorption.
Taking the first structure as an example of magnetic steel, when the bearing stator passes through the application, firstly, the coil 1 is wound on the pole post 23 of the radial stator core 2, then the radial stator core 2 assembly wound with the coil 1 is assembled into the groove part 31 corresponding to the radial ring 3, 4 bolts 6 or bolts are arranged in the circumferential direction for fastening, and the axial positioning of the radial stator core 2 assembly and the radial ring 3 is ensured. The annular magnetic steel 4 is installed and fixed on the end face of the magnetic conduction ring 5 to form a component, and finally the component and the radial ring 3 are assembled together to form the bearing stator.
Compared with the existing structure, the application optimizes the assembly process by the design of buckling connection of the concave-convex dovetail groove structure, thereby achieving the effect of improving the product qualification rate and the production efficiency; on the other hand, the convex structure design of the convex part 21 of the radial stator core 2 increases the magnetic conduction area of the core, remarkably improves the magnetic saturation problem at the winding groove 24 and improves the electromagnetic utilization rate and the bearing capacity.
The application provides a hybrid radial magnetic suspension bearing which comprises a rotor and the bearing stator, wherein the rotor is coaxially arranged in the bearing stator.
It should be noted that the features of the embodiments of the present application may be combined with each other without collision.
Compared with the prior art, the application has the advantages of simple operation, easy disassembly and assembly, greatly shortened assembly time, improved efficiency, and the like, can avoid the problems of part repair, even scrapping and the like possibly caused in the assembly process of the prior art, improves the product percent of pass and reduces the additional manufacturing cost. In addition, the outer circumferential wall of the radial stator core 2 is provided with a protruding structure (namely a protruding part 21) with the outer diameter equal to that of the radial ring 3, so that the magnetic conduction area of the radial stator core 2 is increased, the magnetic saturation problem at the winding groove 24 of the radial stator core 2 is remarkably improved, and the electromagnetic utilization rate and the bearing capacity of the hybrid radial magnetic suspension bearing are greatly improved.
The foregoing is merely illustrative of the present application, and the present application is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present application.
Claims (14)
1. A radial stator core structure, characterized by: the radial stator core comprises a radial stator core (2) and a radial ring (3) which are connected together, wherein a winding groove (24) is formed in the inner ring of the radial stator core (2), a convex part (21) corresponding to the winding groove (24) is arranged on the outer circumferential wall of the radial stator core (2), and a groove part (31) in transition fit with the convex part (21) is arranged on the radial ring (3);
the convex part (21) is provided with an arc-shaped outer wall coaxial with the radial stator core (2), the diameter of the arc-shaped outer wall is equal to the outer diameter of the radial ring (3), and the groove part (31) penetrates through the inner circumferential wall and the outer circumferential wall of the radial ring (3) at the same time along the radial direction of the radial ring (3).
2. The radial stator core structure of claim 1, wherein: the groove part (31) comprises two side walls which are oppositely arranged and a bottom wall (34) connected with the two side walls, and the groove part (31) is provided with an opening part (311) for the convex part (21) to be clamped in at a position far away from the bottom wall (34) along the axial direction of the radial ring (3).
3. The radial stator core structure of claim 2, wherein: one end surface of the protruding part (21) is tightly attached to the bottom wall (34).
4. The radial stator core structure of claim 1, wherein: the groove part (31) is in a dovetail groove structure, and the convex part (21) is in a dovetail tenon structure.
5. The radial stator core structure of claim 2, wherein: both side walls of the groove portion are perpendicular to the bottom wall (34), or both side walls of the groove portion are at an obtuse angle to the bottom wall (34), so that the groove width L of the groove portion (31) gradually decreases from the opening portion (311) to the bottom wall (34) in the axial direction of the radial ring (3).
6. A radial stator core construction according to claim 3, wherein: the two end surfaces of the convex part (21) are respectively flush with the two end surfaces of the radial stator core (2).
7. The radial stator core structure according to any one of claims 1 to 6, wherein: the inner ring of the radial stator core (2) is provided with pole posts (23) distributed in a circumferential array and used for winding the coil (1), one winding groove (24) is arranged between every two adjacent pole posts (23), the number of the protruding parts (21) on the radial stator core (2) is equal to that of the winding grooves (24), and the positions of each protruding part (21) are in one-to-one correspondence with the positions of each winding groove (24).
8. The radial stator core structure of claim 7, wherein: the radial stator core (2) and the radial ring (3) are fixedly connected together through connecting pieces penetrating into the radial stator core and the radial ring.
9. The radial stator core construction of claim 8 wherein: the connecting piece is a screw (6) or a bolt which penetrates through the radial ring (3) and is screwed into the radial stator core (2).
10. The radial stator core structure of claim 9, wherein: screw holes (25) are formed in the outer circumferential wall of the radial stator core (2) between every two adjacent protruding portions (21), the screw holes are used for allowing the screws (6) or the bolts to be screwed in, countersunk through holes (33) corresponding to the screw holes (25) are formed in the radial ring (3) between every two adjacent groove portions (31), and the countersunk through holes are used for allowing the screws (6) or the bolts to pass through and accommodating the screws (6) or the heads of the bolts after the screws (6) or the bolts are screwed in the screw holes (25).
11. The radial stator core structure of claim 10, wherein: each threaded hole (25) corresponds to one of the poles (23), and the axis of each threaded hole (25) is collinear with the centerline of the corresponding pole (23).
12. A bearing stator, characterized by: comprising a radial stator core structure according to any of claims 1 to 11.
13. The bearing stator of claim 12, wherein: the radial ring (3) of the radial stator core structure is sequentially connected with magnetic steel and a magnetic conduction ring (5), and the magnetic steel is annular magnetic steel (4) or a segmented fan-shaped magnetic steel component.
14. The utility model provides a hybrid radial magnetic suspension bearing which characterized in that: comprising a rotor and a bearing stator according to claim 12 or 13, said rotor being coaxially arranged inside said bearing stator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810612419.0A CN108679085B (en) | 2018-06-14 | 2018-06-14 | Radial stator core structure, bearing stator and hybrid radial magnetic suspension bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810612419.0A CN108679085B (en) | 2018-06-14 | 2018-06-14 | Radial stator core structure, bearing stator and hybrid radial magnetic suspension bearing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108679085A CN108679085A (en) | 2018-10-19 |
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| CN110864043B (en) * | 2019-10-08 | 2021-09-03 | 珠海格力电器股份有限公司 | Magnetic suspension radial bearing and assembling method thereof |
| CN114294326B (en) * | 2021-12-27 | 2023-01-10 | 珠海格力电器股份有限公司 | Magnetic suspension radial bearing and motor |
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| CN103195806A (en) * | 2012-01-04 | 2013-07-10 | 珠海格力节能环保制冷技术研究中心有限公司 | Magnetic suspension bearing stator, magnetic suspension bearing, stator core making tool and stator core making method |
| CN204205741U (en) * | 2014-10-13 | 2015-03-11 | 广东威灵电机制造有限公司 | Stator core and stator, motor |
| WO2015154220A1 (en) * | 2014-04-08 | 2015-10-15 | 南车株洲电机有限公司 | Method and device for stacking and fixing stator core used in traction motor of narrow gauge locomotive |
| JP2016185064A (en) * | 2015-03-26 | 2016-10-20 | エスカエフ・マニュティック・メシャトロニク | Stator assembly and magnetic bearing or electric motor including such a stator assembly |
| CN207398940U (en) * | 2017-10-30 | 2018-05-22 | 常州威灵电机制造有限公司 | Stator module and motor |
| CN208503269U (en) * | 2018-06-14 | 2019-02-15 | 珠海格力电器股份有限公司 | Radial stator core structure, bearing stator and hybrid radial magnetic bearing |
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| CN103195806A (en) * | 2012-01-04 | 2013-07-10 | 珠海格力节能环保制冷技术研究中心有限公司 | Magnetic suspension bearing stator, magnetic suspension bearing, stator core making tool and stator core making method |
| WO2015154220A1 (en) * | 2014-04-08 | 2015-10-15 | 南车株洲电机有限公司 | Method and device for stacking and fixing stator core used in traction motor of narrow gauge locomotive |
| CN106415993A (en) * | 2014-04-08 | 2017-02-15 | 中车株洲电机有限公司 | Method and device for stacking and fixing stator core used in traction motor of narrow gauge locomotive |
| CN204205741U (en) * | 2014-10-13 | 2015-03-11 | 广东威灵电机制造有限公司 | Stator core and stator, motor |
| JP2016185064A (en) * | 2015-03-26 | 2016-10-20 | エスカエフ・マニュティック・メシャトロニク | Stator assembly and magnetic bearing or electric motor including such a stator assembly |
| CN207398940U (en) * | 2017-10-30 | 2018-05-22 | 常州威灵电机制造有限公司 | Stator module and motor |
| CN208503269U (en) * | 2018-06-14 | 2019-02-15 | 珠海格力电器股份有限公司 | Radial stator core structure, bearing stator and hybrid radial magnetic bearing |
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