CN110886774A - Novel magnetic suspension radial bearing rotor structure, radial bearing and motor - Google Patents
Novel magnetic suspension radial bearing rotor structure, radial bearing and motor Download PDFInfo
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- CN110886774A CN110886774A CN201911104447.2A CN201911104447A CN110886774A CN 110886774 A CN110886774 A CN 110886774A CN 201911104447 A CN201911104447 A CN 201911104447A CN 110886774 A CN110886774 A CN 110886774A
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- lantern ring
- baffle
- radial bearing
- bearing rotor
- rotor structure
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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
- F16C32/0474—Active magnetic bearings for rotary movement
- F16C32/0476—Active magnetic bearings for rotary movement with active support of one degree of freedom, e.g. axial magnetic bearings
- F16C32/0478—Active magnetic bearings for rotary movement with active support of one degree of freedom, e.g. axial magnetic bearings with permanent magnets to support radial load
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Magnetic Bearings And Hydrostatic Bearings (AREA)
Abstract
The utility model provides a novel magnetic suspension radial bearing rotor structure, journal bearing, motor, relates to bearing technical field, establish the bearing rotor at pivot both ends including the cover, the bearing rotor establishes the epaxial lantern ring of commentaries on classics including the cover, and the cover is equipped with soft magnetic component on the lantern ring, and the both ends of the lantern ring are provided with first interlock part, second interlock part respectively, and first interlock part cooperation cover is equipped with first baffle, and second interlock part cooperation cover is equipped with the second baffle, and the material of the lantern ring, first baffle and second baffle is the same. According to the invention, the first engaging part and the second engaging part are respectively arranged at two ends of the lantern ring, the first baffle plate and the second baffle plate are respectively matched and sleeved on the first engaging part and the second engaging part to replace spot welding for fixation, so that the nonlinear deformation of the baffle plate and the lantern ring and the product quality problem generated during finish turning are avoided, meanwhile, the materials of the lantern ring, the first baffle plate and the second baffle plate are the same, when the temperature of a part is raised due to the change of a magnetic field, the expansion amounts of the baffle plate and the lantern ring are the same, and the separation of the baffle plate and the lantern ring is avoided.
Description
Technical Field
The invention relates to the technical field of bearings, in particular to a novel magnetic suspension radial bearing rotor structure, a radial bearing and a motor.
Background
The magnetic suspension bearing is a high-performance electromechanical integrated bearing which stably suspends a supported part in a space by utilizing electromagnetic force so that the supporting part and the supported part are not in mechanical contact.
The magnetic suspension bearing is divided into a radial bearing and an axial bearing, and the radial bearing structure mainly comprises a radial bearing stator and a radial bearing rotor.
In order to ensure that the main shaft rotor is evenly stressed in the rotating process, the bearing rotor structure adopts an annular structure, silicon steel sheets are simultaneously laminated to reduce the eddy current loss of the rotor, and the baffle plate is adopted to fix the punching sheet to prevent the punching sheet from cracking in the high-speed operation. The existing magnetic suspension radial bearing rotor structure consists of a radial bearing baffle plate, a silicon steel sheet and a central shaft sleeve. The magnetic bearing rotor needs to be hot-fitted into the rotor shaft.
The existing radial bearing rotor is manufactured as follows: heating a central lantern ring, hot-fitting the central lantern ring to the front baffle, performing interference fit between the central lantern ring and the baffle, heating a silicon steel sheet, hot-fitting the silicon steel sheet to the central lantern ring, performing interference fit between the silicon steel sheet and the central lantern ring, and then performing spot welding on the central lantern ring and the baffle to form a complete radial bearing rotor; the heating radial bearing rotor is arranged on the rotating shaft in a hot-fitting mode, the bearing rotor is in interference fit with the rotating shaft, and the front radial bearing rotor, the rear radial bearing rotor and the rotating shaft form a whole.
Adopt different materials to constitute baffle, lantern ring and spot welding operation's bearing rotor assembly income pivot can appear following problem:
on one hand, in order to control the position adjustment of the rotating shaft in the radial direction, the current is continuously changed, the electromagnetic force of the bearing is continuously changed to form a changed magnetic field, the winding, the copper loss of the iron core, the iron loss, the eddy current and the like are influenced to generate heat, so that the temperature of the bearing rotor is increased, because the thermal expansion coefficients of the baffle and the central lantern ring are different, the baffle is made of SUS304, the linear expansion coefficient of the baffle is about 17 x 10-6 mm/DEG C, the central lantern ring is made of 40CrNiMoA, the linear expansion coefficient of the central lantern ring is about 11.5 x 10-6 mm/DEG C, the expansion amount of the baffle is much larger than that of the central lantern ring under the same temperature rise, even if the baffle and the central lantern ring are subjected to spot welding operation, whether weak welding points exist at the welding position cannot be ensured, the high-speed rotation speed of the magnetic suspension motor, the silicon steel sheet can not be fixed, and even the baffle flies out, which causes serious quality problems.
On the other hand, baffle and center lantern ring adopt the spot welding mode to weld tightly, the spot welding temperature is higher, the baffle, towards piece and center lantern ring all can produce the deformation, according to SUS304 and 40CrNiMoA material, when being in zero interference fit between the two, the temperature is only 142 ℃, be obviously less than the spot welding temperature, baffle excircle deformation when this moment towards the static pressure of baffle is possible, the welding only is baffle one side in addition, can make the baffle produce welding stress deformation, this is nonlinear deformation, cause center lantern ring and pivot cooperation, baffle excircle and journal bearing cooperation are bad, the cooperation is bad can influence position sensor to the position control of main shaft skew center.
In addition, spot welding positions of the baffle and the central lantern ring are not flat, although a finish turning mode can be adopted to turn the welding points of the end face and the baffle to be flat and smooth, the finish turning amount cannot be controlled, when the finish turning amount is insufficient, the welding points are not turned to be flat, when the bearing rotor is installed in the rotating shaft in a hot mode, the protruding parts are in contact with the shaft shoulder, gaps are generated between the flat end faces of the baffle and the central lantern ring and the shaft, and the product quality is affected; when the finish turning amount is too large, the turning of the welding spot part is more, the welding is not firm, the baffle and the central lantern ring are separated during high-speed operation, and the product quality is influenced.
Disclosure of Invention
One of the purposes of the invention is to provide a novel magnetic suspension radial bearing rotor structure which can avoid the separation of a baffle and a lantern ring when the electromagnetic force of a bearing is continuously changed, and simultaneously, because the baffle and the lantern ring do not adopt an electric welding fixing mode, the problems of nonlinear deformation of the baffle and the lantern ring and product quality generated during finish turning are avoided.
The purpose of the invention is realized by the following technical scheme:
the utility model provides a novel magnetic suspension radial bearing rotor structure, establish two the same bearing rotor at pivot both ends including establishing respectively, bearing rotor establishes the epaxial lantern ring in pivot including the cover, the cover is equipped with soft magnetic component on the lantern ring, the both ends of the lantern ring are provided with first interlock part, second interlock part respectively, first interlock part cooperation cover is equipped with first baffle, second interlock part cooperation cover is equipped with the second baffle, the lantern ring first baffle with the material of second baffle is the same. Through set up first interlock part respectively at the both ends of the lantern ring, second interlock part, utilize first baffle, the second baffle cooperates the cover respectively to establish at first interlock part, replace the baffle on the second interlock part, the spot welding of the lantern ring is fixed, the baffle has been avoided, the lantern ring produces the product quality problem that produces when nonlinear deformation and finish turning, the lantern ring simultaneously, the material of first baffle and second baffle is the same, can be when bearing electromagnetic force constantly changes, change magnetic field and cause the part when warm, the baffle, the lantern ring expansion volume is the same, avoid the baffle, the separation of the lantern ring.
Further, the first engaging part is a first engaging step arranged on the outer side wall of one end of the lantern ring, and the first baffle is provided with a first step matched with the first engaging step. First baffle is established on the first interlock step on the lateral wall of the one end of lantern ring through the first step cooperation cover that sets up itself to replace the fixed mode of spot welding, avoided baffle, lantern ring to produce the product quality problem that produces when producing nonlinear deformation and finish turning.
Further, the highest point of the first snap-in step is flush with the outer side wall of the collar, and the lowest point of the first snap-in step is located on the outer side of the collar. The highest point of the first engaging step is flush with the outer side wall of the lantern ring, and the lowest point of the first engaging step is located on the outer side of the lantern ring, so that the first baffle can be conveniently installed from the end of the first baffle.
Further, the outer diameter of the first engaging step is larger than the inner diameter of the first step. The outer diameter of the first occlusion step is larger than the inner diameter of the first step, and the first occlusion step can be fixed in a hot sleeve interference fit mode, so that a spot welding fixing mode is replaced, and the product quality problem caused by nonlinear deformation and finish turning of the baffle and the lantern ring is avoided.
Furthermore, the second engaging part is a second engaging step arranged on the outer side wall of the other end of the lantern ring, and the second baffle is provided with a second step matched with the second engaging step. The second baffle is fixed on the second interlock step of the second step cooperation cover on the lateral wall of the one end of lantern ring through itself setting to replace the fixed mode of spot welding, avoided baffle, lantern ring to produce the product quality problem that produces when producing nonlinear deformation and finish turning.
Further, the lowest point of the second snap-in step is flush with the outer side wall of the lantern ring, and the highest point of the second snap-in step is located on the outer side of the lantern ring. The lowest point of the second meshing step is flush with the outer side wall of the lantern ring, and the highest point of the second meshing step is located on the outer side of the lantern ring, so that the second baffle can only be sleeved in from the position where the first baffle is installed, the second baffle cannot fall off from the second meshing step under any condition, and the separation of the baffle and the lantern ring is further avoided.
Further, the outer diameter of the second snap step is larger than the inner diameter of the second step. The outer diameter of the second occlusion step is larger than the inner diameter of the second step, and the second occlusion step can be fixed in a hot sleeve interference fit mode, so that a spot welding fixing mode is replaced, and the product quality problem caused by nonlinear deformation and finish turning of the baffle and the lantern ring is avoided.
Further, the soft magnetic component is a silicon steel sheet.
The invention has the beneficial effects that: the novel magnetic suspension radial bearing rotor structure comprises two identical bearing rotors which are respectively sleeved at two ends of a rotating shaft, wherein each bearing rotor comprises a lantern ring sleeved on the rotating shaft, a soft magnetic part is sleeved on the lantern ring, a first occlusion part and a second occlusion part are respectively arranged at two ends of the lantern ring, a first baffle is sleeved on the first occlusion part in a matching mode, a second baffle is sleeved on the second occlusion part in a matching mode, and the lantern ring, the first baffle and the second baffle are made of the same material. According to the invention, the first engaging part and the second engaging part are respectively arranged at two ends of the lantern ring, the first baffle plate and the second baffle plate are respectively matched and sleeved on the first engaging part and the second engaging part to replace the spot welding fixation of the baffle plate and the lantern ring, so that the product quality problems caused by the nonlinear deformation of the baffle plate and the lantern ring and the finish turning are avoided, meanwhile, the lantern ring, the first baffle plate and the second baffle plate are made of the same material, and when the temperature of a part is raised due to the change of a magnetic field when the electromagnetic force of a bearing is continuously changed, the expansion amount of the baffle plate and the lantern ring is the same, so that the separation of the baffle.
The second purpose of the invention is to provide a radial bearing which avoids the defects in the prior art, the radial bearing uses the novel magnetic suspension radial bearing rotor structure, because the first meshing part and the second meshing part are respectively arranged at the two ends of the lantern ring, the first baffle and the second baffle are respectively matched and sleeved on the first meshing part and the second meshing part to replace the spot welding fixation of the baffle and the lantern ring, the product quality problems caused by the nonlinear deformation of the baffle and the lantern ring and the finish turning are avoided, meanwhile, the materials of the lantern ring, the first baffle and the second baffle are the same, when the electromagnetic force of the bearing is changed, the magnetic field is changed to cause the temperature rise of parts, the expansion amount of the baffle and the lantern ring is the same, and the baffle and the lantern ring are prevented from being separated continuously.
The motor uses the radial bearing, because the first occlusion part and the second occlusion part are respectively arranged at the two ends of the lantern ring, the first baffle plate and the second baffle plate are respectively matched and sleeved on the first occlusion part and the second occlusion part to replace the spot welding fixation of the baffle plate and the lantern ring, the product quality problems caused by the nonlinear deformation of the baffle plate and the lantern ring and the finish turning are avoided, meanwhile, the lantern ring, the first baffle plate and the second baffle plate are made of the same material, and when the electromagnetic force of the bearing is continuously changed, the magnetic field is changed to cause the temperature rise of parts, the expansion amount of the baffle plate and the lantern ring is the same, and the separation of the baffle plate and the lantern ring is avoided.
Drawings
The invention is further illustrated by means of the attached drawings, but the embodiments in the drawings do not constitute any limitation to the invention, and for a person skilled in the art, other drawings can be derived on the basis of the following drawings without inventive effort.
Fig. 1 is a schematic overall structure diagram of a novel magnetic suspension radial bearing rotor structure installed on a rotating shaft.
Fig. 2 is a schematic overall structure diagram of a novel magnetic suspension radial bearing rotor structure of the invention.
Figure 3 is a cross-sectional view of the collar of a novel magnetic radial bearing rotor structure of the present invention.
Figure 4 is a top view of the collar of a novel magnetic radial bearing rotor structure of the present invention.
Fig. 5 is a cross-sectional view of a first baffle of a novel magnetic suspension radial bearing rotor structure of the present invention.
Fig. 6 is a bottom view of the first baffle of the novel magnetic suspension radial bearing rotor structure of the invention.
Fig. 7 is a cross-sectional view of a second baffle of a novel magnetic levitation radial bearing rotor structure of the present invention.
Fig. 8 is a bottom view of the second baffle of the novel magnetic suspension radial bearing rotor structure of the invention.
The figure includes:
the bearing comprises a rotating shaft 1, a bearing rotor 2, a lantern ring 3, a soft magnetic component 4, a first baffle 5 and a second baffle 6.
Detailed Description
The invention is further described with reference to the following examples.
Example 1
The novel magnetic suspension radial bearing rotor structure of this embodiment, as shown in fig. 1-8, establish two the same bearing rotor 2 at 1 both ends of pivot including establishing respectively, bearing rotor 2 establishes the lantern ring 3 in pivot 1 including the cover, the cover is equipped with soft magnetic component 4 on the lantern ring 3, the both ends of the lantern ring 3 are provided with first interlock part, second interlock part respectively, first interlock part cooperation cover is equipped with first baffle 5, second interlock part cooperation cover is equipped with second baffle 6, the lantern ring 3 first baffle 5 with the material of second baffle 6 is the same. Through set up first interlock part respectively at the both ends of the lantern ring 3, second interlock part, utilize first baffle 5, second baffle 6 cooperates the cover respectively and establishes at first interlock part, replace the baffle on the second interlock part, the spot welding of the lantern ring 3 is fixed, the baffle has been avoided, the product quality problem that produces when the lantern ring 3 produces nonlinear deformation and finish turning, the lantern ring 3 simultaneously, the material of first baffle 5 and second baffle 6 is the same, can be when bearing electromagnetic force constantly changes, change magnetic field and cause the part when warm, the baffle, the lantern ring expansion volume is the same, avoid the baffle, the lantern ring separation. The production efficiency and the product quality of the product are improved.
The first engaging part is a first engaging step arranged on the outer side wall of one end of the lantern ring 3, and the first baffle 5 is provided with a first step matched with the first engaging step. First baffle 5 is established on the first interlock step on the lateral wall of the one end of lantern ring 3 through the first step cooperation cover that sets up itself to replace the fixed mode of spot welding, avoided baffle, lantern ring 3 to produce the product quality problem that produces when producing nonlinear deformation and finish turning.
The highest point of the first snap-in step is flush with the outer side wall of the collar 3, and the lowest point of the first snap-in step is located on the outer side of the collar 3. The highest point of the first snap-in step is flush with the outer side wall of the collar 3, and the lowest point of the first snap-in step is located on the outer side of the collar 3, so that the first baffle 5 can be conveniently installed on the first baffle 5 from the end.
The outer diameter of the first engaging step is larger than the inner diameter of the first step. The external diameter of first interlock step is greater than the internal diameter of first step, can adopt hot jacket interference fit's mode to fix to replace the fixed mode of spot welding, avoided baffle, lantern ring 3 to produce the product quality problem that produces when producing nonlinear deformation and finish turning.
The second engaging part is a second engaging step arranged on the outer side wall of the other end of the lantern ring 3, and the second baffle 6 is provided with a second step matched with the second engaging step. The second baffle 6 is fixed on the second interlock step on the lateral wall of the one end of the lantern ring 3 through the second step cooperation cover that sets up itself to replace the fixed mode of spot welding, avoided baffle, lantern ring 3 to produce the product quality problem that produces when producing nonlinear deformation and finish turning.
The lowest point of the second snap-in step is flush with the outer side wall of the lantern ring 3, and the highest point of the second snap-in step is located on the outer side of the lantern ring 3. The lowest point of the second meshing step is flush with the outer side wall of the lantern ring 3, the highest point of the second meshing step is located on the outer side of the lantern ring 3, the second baffle 6 can only be sleeved in from the position where the first baffle 5 is installed, the second baffle 6 cannot fall off from the second meshing step under any condition, and separation of the baffle and the lantern ring 3 is further avoided.
The outer diameter of the second snap-in step is larger than the inner diameter of the second step. The external diameter of second interlock step is greater than the internal diameter of second step, can adopt hot jacket interference fit's mode to fix to replace the fixed mode of spot welding, avoided baffle, lantern ring 3 to produce the product quality problem that produces when producing nonlinear deformation and finish turning.
The soft magnetic component is a silicon steel sheet.
Example 2
This embodiment provides a radial bearing, this radial bearing uses embodiment 1 novel magnetic suspension radial bearing rotor structure, owing to set up first interlock part respectively through the both ends at lantern ring 3, second interlock part, utilize first baffle 5, second baffle 6 cooperates the cover respectively to establish at first interlock part, replace the baffle on the second interlock part, lantern ring 3's spot welding is fixed, the baffle has been avoided, the lantern ring 3 produces the product quality problem that produces when nonlinear deformation and finish turning, the lantern ring 3 simultaneously, first baffle 5 is the same with the material of second baffle 6, can be when bearing electromagnetic force changes, change magnetic field and cause the part when warm, the baffle, the lantern ring inflation volume is the same, avoid the baffle, the lantern ring separation constantly. The production efficiency and the product quality of the product are improved.
Example 3
This embodiment provides a motor, this motor uses embodiment 2 journal bearing, owing to set up first interlock part, second interlock part respectively through the both ends at lantern ring 3, utilize first baffle 5, second baffle 6 cooperates the cover respectively to establish at first interlock part, replace the baffle on the second interlock part, lantern ring 3's spot welding is fixed, the baffle has been avoided, the lantern ring 3 produces the product quality problem that produces when nonlinear deformation and finish turning, lantern ring 3 simultaneously, first baffle 5 is the same with the material of second baffle 6, can be when bearing electromagnetic force constantly changes, when changing magnetic field and causing the part temperature, the baffle, the lantern ring expansion volume is the same, avoid the baffle, the lantern ring separation. The production efficiency and the product quality of the product are improved.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the protection scope of the present invention, although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (10)
1. The utility model provides a novel magnetic suspension radial bearing rotor structure, establishes two the same bearing rotor at pivot both ends including establishing respectively, its characterized in that: the bearing rotor establishes at the epaxial lantern ring of commentaries on classics including the cover, the cover is equipped with soft magnetic part on the lantern ring, the both ends of the lantern ring are provided with first interlock part, second interlock part respectively, first interlock part cooperation cover is equipped with first baffle, second interlock part cooperation cover is equipped with the second baffle, the lantern ring first baffle with the material of second baffle is the same.
2. A new magnetic levitation radial bearing rotor structure as claimed in claim 1, wherein: the first engaging part is a first engaging step arranged on the outer side wall of one end of the lantern ring, and the first baffle is provided with a first step matched with the first engaging step.
3. A new magnetic levitation radial bearing rotor structure as claimed in claim 2, wherein: the highest point of the first snap-in step is flush with the outer side wall of the lantern ring, and the lowest point of the first snap-in step is located on the outer side of the lantern ring.
4. A new magnetic levitation radial bearing rotor structure as claimed in claim 3, wherein: the outer diameter of the first engaging step is larger than the inner diameter of the first step.
5. A new magnetic levitation radial bearing rotor structure as claimed in claim 1, wherein: the second engaging part is a second engaging step arranged on the outer side wall of the other end of the lantern ring, and the second baffle is provided with a second step matched with the second engaging step.
6. A new magnetic suspension radial bearing rotor structure as claimed in claim 5, characterized in that: the lowest point of the second meshing step is flush with the outer side wall of the lantern ring, and the highest point of the second meshing step is located on the outer side of the lantern ring.
7. A new magnetic suspension radial bearing rotor structure as claimed in claim 5, characterized in that: the outer diameter of the second snap-in step is larger than the inner diameter of the second step.
8. A new magnetic levitation radial bearing rotor structure as claimed in claim 1, wherein: the soft magnetic component is a silicon steel sheet.
9. A radial bearing, characterized by: comprising the new magnetic levitation radial bearing rotor structure as claimed in any of claims 1 to 8.
10. An electric machine characterized by: comprising a radial bearing according to claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911104447.2A CN110886774A (en) | 2019-11-13 | 2019-11-13 | Novel magnetic suspension radial bearing rotor structure, radial bearing and motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911104447.2A CN110886774A (en) | 2019-11-13 | 2019-11-13 | Novel magnetic suspension radial bearing rotor structure, radial bearing and motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110886774A true CN110886774A (en) | 2020-03-17 |
Family
ID=69747345
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911104447.2A Pending CN110886774A (en) | 2019-11-13 | 2019-11-13 | Novel magnetic suspension radial bearing rotor structure, radial bearing and motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110886774A (en) |
-
2019
- 2019-11-13 CN CN201911104447.2A patent/CN110886774A/en active Pending
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