Air suspension motor with fixing device
By setting fixing devices at both ends of the rotor of the air-suspended motor, the axial and radial limits of the rotor are achieved, and the extrusion and wear of the radial bearings by the rotor before transportation and installation is solved to ensure the integrity of the bearing.
Patent Information
- Application Number
- CN202421712505.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-19
- Publication Date
- 2025-08-01
- Estimated Expiration
- 2034-07-19
AI Technical Summary
During the manufacturing and transportation of existing air suspension motors, the extrusion and wear of the rotor on the radial bearings have not been effectively solved, resulting in bearing damage.
An air suspension motor with a fixing device is designed. By providing a flow channel body and a fan cover plate at both ends of the rotor, the first and second fixed tools are used to connect to the impeller and the tie rod respectively, so as to realize the axial and radial limits of the rotor, offset the rotor's own weight and magnetic force, and avoid contact with the radial bearing.
It effectively avoids the extrusion and wear of the radial bearing by the air-suspended motor rotor before transportation and installation, and protects the integrity of the bearing.
Smart Images
Figure CN223181927U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of motors, in particular to a magnetic levitation motor with a fixing device. Background Art
[0002] Due to the radial bearing structure problem of the magnetic levitation motor, if there is continuous weight pressing on the radial bearing, it will cause damage to the radial bearing of the magnetic levitation motor; when the magnetic levitation motor is not running, the weight of the rotor itself and the magnetic force generated by the magnetism carried by the rotor will all act on the radial bearing of the magnetic levitation motor.
[0003] After the magnetic levitation motor is manufactured, during the shipping process and before installation and use, if the rotor is not fixed, the radial bearing of the magnetic levitation motor will be damaged due to the bumping during transportation, which will cause the rotor to squeeze the foil of the radial bearing, and the radial bearing will be damaged during transportation; after manufacturing and before installation, the rotor gravity will also damage the radial bearing. During the acceleration and deceleration of the magnetic levitation motor thrust bearing during transportation, it will squeeze and wear the foil of the thrust bearing, resulting in damage to the thrust bearing during transportation. The existing solutions can only axially limit the rotor. During the shipping process, due to transportation bumps and vibrations, the rotor will collide with the foil of the radial bearing in the radial direction, resulting in damage to the radial bearing.
[0004] Therefore, how to avoid the extrusion and wear of the rotor of the magnetic levitation motor before use by the radial bearing is a technical problem that needs to be solved by those skilled in the art at present. Summary of the Utility Model
[0005] The purpose of the utility model is to provide a magnetic levitation motor with a fixing device, which can avoid the extrusion and wear of the rotor of the magnetic levitation motor before use by the radial bearing.
[0006] To achieve the above purpose, the utility model provides a magnetic levitation motor with a fixing device, which includes a runner body and a fan cover plate respectively arranged at both ends of the rotor. The runner body is connected with a first fixing tooling, and the first fixing tooling can abut against the end face of the impeller, so that the thrust disc pressed by the impeller fits against one end of the rotor. The fan cover plate is connected with a second fixing tooling, and the second fixing tooling is rotatably connected to a pull rod to drive the rotor fixedly sleeved on the pull rod to move axially along itself.
[0007] Preferably, thrust end covers and fan end covers are respectively provided at both ends of the rotor, and the thrust end cover and the fan end cover are connected to the stator through a first connecting member, a radial bearing is arranged between the rotor and the thrust end cover, and a first gap is provided between the radial bearing and the rotor, a thrust bearing, a thrust disk and a flow channel body are sequentially provided on the side of the thrust end cover away from the fan end cover, and the flow channel body is detachably connected to the thrust end cover, and the side of the fan end cover away from the thrust end cover is connected to the fan cover plate through a connecting structure.
[0008] Preferably, the impeller is located between the first fixing tool and the thrust plate, and a first limit piece sleeved on the pull rod is provided on the side of the impeller facing away from the rotor, and a first through hole coaxial with the rotor is provided in the middle of the first fixing tool so that the first limit piece is nested inside the first through hole.
[0009] Preferably, the first fixing fixture also includes a first fixing portion and an abutment surface. The first fixing portion is arranged in the circumference of the first fixing fixture and corresponds to the fixing hole of the flow channel body, so that the first fixing portion passed through the second connecting member is fitted to the flow channel body, and the abutment surface is an annular surface perpendicular to the axial direction of the rotor and can be fitted to the end face of the impeller.
[0010] Preferably, the second fixing fixture includes a second fixing portion and a countersunk groove, and the fan cover is provided with a connecting portion adapted to the second fixing portion so that the second fixing fixture and the fan cover are detachably connected through a third connecting member, and the countersunk groove is arranged on the side of the second fixing portion close to the rotor, and the countersunk groove is provided with an internal thread so that the pull rod can be rotatably connected to the countersunk groove.
[0011] Preferably, the connecting portion and the second fixing portion are respectively provided with a second through hole and a third through hole, and the third connecting member is a screw rod, and can be passed through the corresponding second through hole and third through hole.
[0012] Preferably, a second gap is provided between the first through hole and the first limit member, a third gap is provided between the countersunk groove and the pull rod, a fourth gap is provided between the third connecting member and the second through hole, and a fifth gap is provided between the third connecting member and the third through hole, and the sum of the thicknesses of the second gap, the third gap, the fourth gap and the fifth gap along the height direction is less than the thickness of the first gap along the height direction.
[0013] Preferably, the third through holes are evenly distributed along the circumference of the second fixing portion, and the number of the third through holes is twice the number of the second through holes.
[0014] Preferably, a fan is provided between the second fixing fixture and the rotor, and a second limiting member is provided on the side of the fan facing away from the rotor. The limiting member is sleeved on the outer circumference of the pull rod to limit the movement of the rotor and the fan relative to the pull rod.
[0015] Preferably, the connecting structure is connected to the fan wheel cover, and the fan wheel cover is located outside the fan.
[0016] Compared with the above-mentioned background art, the air suspension motor with a fixing device provided by the present utility model includes a runner body and a fan cover plate respectively arranged at both ends of the rotor. The runner body is connected with a first fixing tooling, and the first fixing tooling can abut against the end face of the impeller, so that the thrust disk pressed by the impeller fits against one end of the rotor. The fan cover plate is connected with a second fixing tooling, and the second fixing tooling is rotatably connected to a pull rod to drive the rotor fixedly sleeved on the pull rod to move axially along its own axis.
[0017] Specifically, at the impeller end, the end face of the impeller is axially tightened by the first fixing tooling, so that the thrust disk of the air suspension motor tightly adheres to the rotor to limit the axial movement of the rotor. At the same time, at the fan end, the second fixing tooling is connected to the pull rod located at the fan end, and the rotor is tightened towards the fan end of the air suspension motor to axially limit the rotor. By connecting the first fixing tooling to the runner body and the second fixing tooling to the fan cover plate, the radial positions of the first fixing tooling and the second fixing tooling are fixed, thereby radially limiting the rotor. The first fixing tooling and the second fixing tooling counteract the self-weight of the rotor and its own magnetic force, and lift the rotor relative to the radial bearing, which can avoid the extrusion and wear of the radial bearing by the rotor of the air suspension motor before use. Description of the Drawings
[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the provided drawings.
[0019] Figure 1 It is a schematic structural diagram of the air suspension motor with a fixing device provided by the embodiment of the present utility model.
[0020] Wherein:
[0021] 1 - runner body, 2 - first fixing tooling, 3 - first limiting member, 4 - pull rod, 5 - impeller, 6 - thrust disk, 7 - radial bearing, 8 - thrust bearing, 9 - thrust end cover, 10 - stator, 11 - rotor, 12 - fan end cover, 13 - fan cover plate, 14 - fan, 15 - second fixing tooling, 17 - second limiting member, 18 - fan wheel cover. Specific Embodiments
[0022] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.
[0023] In order to enable those skilled in the art of this technology to better understand the solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0024] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as "radial direction", "axial direction", "impeller end", and "fan end" is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated position or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of the present invention.
[0025] The purpose of the present invention is to provide a magnetic levitation motor with a fixing device, which can avoid the extrusion and wear of the rotor of the magnetic levitation motor on the radial bearing before use.
[0026] Please refer to Figure 1 , to achieve the above purpose, the present invention provides a magnetic levitation motor with a fixing device, including a flow channel body 1 and a fan cover plate 13 respectively arranged at both ends of the rotor 11. The flow channel body 1 is connected with a first fixing tooling 2, and the first fixing tooling 2 can abut against the end face of the impeller 5, so that the thrust disk 6 pressed by the impeller 5 fits against one end of the rotor 11. The fan cover plate 13 is connected with a second fixing tooling 15, and the second fixing tooling 15 is rotatably connected to the pull rod 4 to drive the rotor 11 fixedly sleeved on the pull rod 4 to move along its own axial direction.
[0027] It should be noted that the magnetic levitation motor includes an impeller end and a fan end at both ends of the rotor 11. Before the magnetic levitation motor is used, the first fixing tooling 2 at the impeller end and the second fixing tooling 15 at the fan end are fixedly matched with other components of the magnetic levitation motor, so that the first fixing tooling 2 and the second fixing tooling 15 indirectly limit the rotor 11.
[0028] Specifically, at the impeller end, the first fixing tooling 2 axially presses against the end face of the impeller 5, causing the thrust disc 6 of the air suspension motor to closely adhere to the rotor 11 to restrict the axial movement of the rotor 11. At the same time, at the fan end, the second fixing tooling 15 is connected to the pull rod 4 located at the fan end, pulling the rotor 11 towards the fan end of the air suspension motor to axially limit the rotor 11; by connecting the first fixing tooling 2 to the flow channel body 1 and the second fixing tooling 15 to the fan cover plate 13, the radial positions of the first fixing tooling 2 and the second fixing tooling 15 are fixed, thereby radially limiting the rotor 11. The first fixing tooling 2 and the second fixing tooling 15 counteract the self-weight of the rotor 11 and its own magnetic force, and suspend and lift the rotor 11 relative to the radial bearing 7, which can avoid the extrusion and wear of the radial bearing 7 by the rotor 11 of the air suspension motor before use.
[0029] Preferably, thrust end covers 9 and fan end covers 12 are respectively sleeved at both ends of the rotor 11, and the thrust end covers 9 and the fan end covers 12 are connected to the stator 10 through first connecting members. The radial bearing 7 is arranged between the rotor 11 and the thrust end cover 9, and a first gap is provided between the radial bearing 7 and the rotor 11. On the side of the thrust end cover 9 facing away from the fan end cover 12, a thrust bearing 8, a thrust disc 6 and a flow channel body 1 are sequentially arranged, and the flow channel body 1 is detachably connected to the thrust end cover 9. The side of the fan end cover 12 facing away from the thrust end cover 9 is connected to the fan cover plate 13 through an engagement structure.
[0030] It can be understood that the first fixing tooling 2 and the second fixing tooling 15 counteract the self-weight of the rotor 11 and its own magnetic force, and suspend and lift the rotor 11 relative to the radial bearing 7, so that a first gap is provided between the radial bearing 7 and the rotor 11 to avoid damage to the radial bearing 7 during the transportation of the air suspension motor caused by the contact between the rotor 11 and the radial bearing 7.
[0031] Wherein, thrust end covers 9 and fan end covers 12 are respectively sleeved circumferentially at both ends of the rotor 11. By connecting the thrust end covers 9 and the fan end covers 12 to the stator 10 of the air suspension motor through first connecting members, the relative positions of the thrust end covers 9 and the fan end covers 12 are fixed. The flow channel body 1 is detachably connected to the side of the thrust end cover 9 facing away from the fan end cover 12. By pressing the end face of the impeller 5 with the first fixing tooling 2 installed on the flow channel body 1, the thrust disc 6 pressed by the impeller 5 presses the thrust bearing 8, so that the gap between the thrust disc 6 and the thrust bearing 8 disappears, thereby axially limiting the rotor 11; the side of the fan end cover 12 facing away from the thrust end cover 9 is connected with an engagement structure, and through the engagement structure, the position of the fan cover plate 13 is fixed, and further, the second fixing tooling 15 drives the rotor 11 sleeved on the pull rod 4 to be axially tightened towards the fan end.
[0032] Preferably, the impeller 5 is located between the first fixing tooling 2 and the thrust disc 6. A first limiting member 3 sleeved on the pull rod 4 is provided on the side of the impeller 5 facing away from the rotor 11. A first through hole coaxial with the rotor 11 is provided in the middle of the first fixing tooling 2 so that the first limiting member 3 is nested inside the first through hole. The first fixing tooling 2 further includes a first fixing portion and an abutting surface. The first fixing portion is arranged in the circumferential direction of the first fixing tooling 2 and corresponds to the fixing holes of the flow channel body 1, so that the first fixing portion penetrated by the second connecting member fits against the flow channel body 1. The abutting surface is an annular surface perpendicular to the axial direction of the rotor 11 and can fit against the end face of the impeller.
[0033] In this embodiment, preferably, a first through hole coaxial with the rotor 11 is provided in the middle of the first fixing tooling 2. By nesting the first limiting member 3, which is located on the side of the impeller 5 facing away from the rotor 11 and sleeved on the pull rod 4, in the first through hole, the abutting surface of the first fixing tooling 2 can be made to fit against the end face of the impeller 5. The position of the first fixing tooling 2 is fixed by passing the second connecting member through the first fixing portion of the first fixing tooling 2 and the fixing holes of the flow channel body 1.
[0034] Among them, preferably, the first fixing tooling 2 includes a vertical portion and a bent portion that are perpendicular to each other. After the first fixing tooling 2 abuts against the end of the flow channel body 1 through the vertical portion and the bent portion, it is connected and fixed by the second connecting member. The bent portion is provided with a number of through-type through holes adapted to the second connecting member to pass through and corresponding to the fixing holes.
[0035] Preferably, the second fixing tooling 15 includes a second fixing portion and a counterbore groove. The fan cover plate 13 is provided with a connecting portion adapted to the second fixing portion, so that the second fixing tooling 15 and the fan cover plate 13 penetrated by the third connecting member are detachably connected. The counterbore groove is arranged on the side of the second fixing portion close to the rotor 11. The counterbore groove is provided with an internal thread so that the pull rod 4 is rotatably connected to the counterbore groove. The connecting portion and the second fixing portion are respectively provided with a second through hole and a third through hole. The third connecting member is a screw and can pass through the corresponding second through hole and third through hole.
[0036] In this embodiment, the second fixing tooling 15 includes a second fixing portion provided with a third through hole and a counterbore groove provided with an internal thread. By rotatably connecting the pull rod 4 to the counterbore groove, rotating the second fixing portion can drive the pull rod 4 and the rotor 11 to move axially towards the fan end along their own axes. The second fixing tooling 15 is fixed relative to the fan cover plate 13 by the fan cover plate 13 being provided with a connecting portion including a second through hole and the third connecting member passing through the third through hole and the second through hole.
[0037] Among them, it is preferred that the third connecting member is a screw rod, and internal threads capable of being cooperatively connected with the screw rod are provided in the third through hole and the second through hole. In addition, coordination protrusions are provided on both the connecting portion and the second fixing portion. The vertical surfaces of the two coordination protrusions are mutually attached, and the coordination protrusion of the connecting portion abuts against the second fixing tooling 15, and the coordination protrusion of the second fixing portion abuts against the fan cover plate 13. The distances from the axes of the third through hole and the second through hole on the two installed coordination protrusions to the axis of the pull rod 4 are equal, which is convenient for fixing after the third connecting member is inserted.
[0038] Preferably, a second gap is provided between the first through hole and the first limiting member 3, a third gap is provided between the counterbore groove and the pull rod 4, a fourth gap is provided between the third connecting member and the second through hole, and a fifth gap is provided between the third connecting member and the third through hole. The sum of the thicknesses of the second gap, the third gap, the fourth gap, and the fifth gap in the height direction is less than the thickness of the first gap in the height direction.
[0039] During use, first install the first fixing tooling 2, assemble the first fixing tooling 2 and the runner body 1 together with bolts. At the same time, the first through hole in the middle of the first fixing tooling 2 and the first limiting member 3 are assembled together through dimensional matching. The abutting surface of the first fixing tooling 2 needs to press tightly against the end face of the impeller 5, and then tighten the bolts installed in the first fixing portion of the first fixing tooling 2 and the fixing hole of the runner body 1; after the first fixing tooling 2 is installed, then install the second fixing tooling 15. The second fixing tooling 15 is connected to the pull rod 4 at the fan end through a threaded connection, connect the second fixing tooling 15 and the fan cover plate 13 with bolts, screw the second fixing tooling 15 in place on the pull rod 4 at the fan end, and then loosen 1 - 2 thread turns for tightening the bolts after the third through hole and the second through hole are aligned.
[0040] At the impeller end, the impeller 5 is axially pressed tightly by the first fixing tooling 2, so that the thrust disk 6 of the air suspension motor is closely attached to the thrust bearing 8 to limit the axial movement of the rotor 11. At the same time, at the fan end, the counterbore groove in the middle of the second fixing tooling 15 is locked with the pull rod 4 at the fan end to tighten the rotor 11 towards the fan end of the air suspension motor; through the clearance fit between the first fixing tooling 2 and the first limiting member 3 and the runner body 1, and the clearance fit between the second fixing tooling 15 and the pull rod 4 at the fan end and the fan cover plate 13, and the sum of the clearances of the above clearance fits is less than the first gap, so that the rotor 11 floats relative to the radial bearing 7.
[0041] Preferably, the third through holes are evenly distributed along the circumferential direction of the second fixing portion, and the number of the third through holes is twice the number of the second through holes.
[0042] In this embodiment, the third through-holes are uniformly distributed along the circumferential direction of the second fixing portion. To facilitate the installation and positioning of the second fixing tooling 15, preferably, the number of the third through-holes is twice the number of the second through-holes. The number of the third through-holes can be adjusted according to actual conditions and is not specifically limited herein as long as the above object can be achieved.
[0043] Preferably, a fan 14 is provided between the second fixing tooling 15 and the rotor 11, and a second limiting member 17 is provided on the side of the fan 14 facing away from the rotor 11. The limiting member is sleeved on the outer periphery of the pull rod 4 to limit the relative movement of the rotor 11 and the fan 14 with respect to the pull rod 4. The connecting structure is connected with a fan wheel cover 18, and the fan wheel cover 18 is located outside the fan 14.
[0044] It should be noted that a fan 14 is provided between the second fixing tooling 15 and the rotor 11. The second limiting member 17 is provided on the side of the fan 14 facing away from the rotor 11 to limit the rotor 11 and the fan 14. The connecting structure is also connected with a fan wheel cover 18 located outside the fan 14 to protect the normal operation of the fan 14.
[0045] It should be noted that in this specification, relational terms such as first and second are only used to distinguish one entity from several other entities, and do not necessarily require or imply any actual relationship or order between these entities.
[0046] The various embodiments in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. The same or similar parts among the various embodiments can be referred to each other.
[0047] Specific examples are used in this article to elaborate on the principles and implementation manners of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the protection scope of the present invention.
Claims
1. A magnetic levitation motor with a fixing device, characterized in that, It includes a runner body and a fan cover plate respectively arranged at both ends of the rotor. The runner body is connected with a first fixing tooling, and the first fixing tooling can abut against the end face of the impeller, so that the thrust disc pressed by the impeller fits against one end of the rotor. The fan cover plate is connected with a second fixing tooling, and the second fixing tooling is rotatably connected to a pull rod to drive the rotor fixedly sleeved on the pull rod to move along its own axial direction.
2. The air suspension motor with a fixing device according to claim 1, wherein, Thrust end covers and fan end covers are respectively sleeved at both ends of the rotor, and the thrust end covers and the fan end covers are connected to the stator through first connecting pieces. A radial bearing is arranged between the rotor and the thrust end cover, and a first gap is arranged between the radial bearing and the rotor. On the side of the thrust end cover facing away from the fan end cover, a thrust bearing, a thrust disc and the runner body are arranged in sequence, and the runner body is detachably connected to the thrust end cover. The side of the fan end cover facing away from the thrust end cover is connected to the fan cover plate through a connecting structure.
3. The air suspension motor with a fixing device according to claim 2, characterized in that, The impeller is located between the first fixing tooling and the thrust disc, and a first limiting member sleeved on the pull rod is arranged on the side of the impeller facing away from the rotor. A first through hole coaxial with the rotor is arranged in the middle of the first fixing tooling, so that the first limiting member is nested inside the first through hole.
4. The air suspension motor with a fixing device according to claim 3, characterized in that, The first fixing tooling further includes a first fixing part and an abutting surface. The first fixing part is arranged in the circumferential direction of the first fixing tooling and corresponds to the fixing hole of the runner body, so that the first fixing part penetrated by the second connecting piece fits against the runner body. The abutting surface is an annular surface perpendicular to the axial direction of the rotor and can fit against the end face of the impeller.
5. The air suspension motor with a fixing device according to claim 3, characterized in that, The second fixing tooling includes a second fixing part and a counterbore groove. The fan cover plate is provided with a connecting part adapted to the second fixing part, so that the second fixing tooling and the fan cover plate penetrated by the third connecting piece are detachably connected. The counterbore groove is arranged on the side of the second fixing part close to the rotor, and the counterbore groove is provided with an internal thread, so that the pull rod is rotatably connected to the counterbore groove.
6. The air suspension motor with a fixing device according to claim 5, characterized in that, The connecting part and the second fixing part are respectively provided with a second through hole and a third through hole. The third connecting piece is a screw rod and can penetrate through the corresponding second through hole and third through hole.
7. The air suspension motor with a fixing device according to claim 6, characterized in that, A second gap is arranged between the first through hole and the first limiting member, a third gap is arranged between the counterbore groove and the pull rod, a fourth gap is arranged between the third connecting piece and the second through hole, and a fifth gap is arranged between the third connecting piece and the third through hole. The sum of the thicknesses of the second gap, the third gap, the fourth gap and the fifth gap in the height direction is less than the thickness of the first gap in the height direction.
8. The air suspension motor with a fixing device according to claim 6, characterized in that, The third through holes are uniformly distributed in the circumferential direction of the second fixing part, and the number of the third through holes is twice the number of the second through holes.
9. The air suspension motor with a fixing device according to claim 2, wherein, A fan is provided between the second fixing tooling and the rotor, and a second limiting member is provided on a side of the fan facing away from the rotor. The limiting member is sleeved on the outer periphery of the pull rod to limit the relative movement of the rotor and the fan with respect to the pull rod.
10. The air suspension motor with a fixing device according to claim 9, characterized in that, The connecting structure is connected with a fan wheel cover, and the fan wheel cover is located outside the fan.