CN211623753U - Rotor system and air compressor - Google Patents
Rotor system and air compressor Download PDFInfo
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- CN211623753U CN211623753U CN202020127007.0U CN202020127007U CN211623753U CN 211623753 U CN211623753 U CN 211623753U CN 202020127007 U CN202020127007 U CN 202020127007U CN 211623753 U CN211623753 U CN 211623753U
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Abstract
The utility model discloses a rotor system and air compressor, this rotor system includes: a rotor shaft; the pinch roller is sleeved on the rotor shaft; the magnetic rotor is sleeved on the rotor shaft; the bearing sleeve comprises a first bearing sleeve and a second bearing sleeve, the first bearing sleeve and the second bearing sleeve are respectively sleeved on the rotor shaft, and two opposite end faces of the first bearing sleeve and the second bearing sleeve are respectively abutted against two end faces of the magnetic rotor; and the thrust bearing is sleeved on the rotor shaft and is positioned between the pressing wheel and the first bearing sleeve in the axial direction of the rotor shaft. According to the utility model discloses a rotor system, simple structure, inertia are little, can keep air compressor to have lower noise lastingly, and the NVH performance is good.
Description
Technical Field
The utility model relates to a rotor system field particularly, relates to a rotor system and have rotor system's air compressor.
Background
In addition to the air compressor being one of the key components in the auxiliary air supply assembly of the engine of the new energy fuel cell automobile, the air compressor directly affects the stoichiometric ratio, the air humidification characteristic and the water heat management characteristic in the fuel cell engine, and further affects the voltage output of the electric pile in the fuel cell and the power output of the engine in the fuel cell.
The air compressor is usually driven by an electric motor, consuming the power of the engine itself of the fuel cell vehicle. In order to improve the effective power output of the engine and reduce the parasitic power consumption of the air compressor, the high-efficiency air compressor technology draws extensive attention. Moreover, due to the ultra-high speed operation of the air compressor, the rotor will be subjected to greater and greater centrifugal force as the rotational speed increases. The permanent magnet material in the rotor generally has a compressive strength of about 1000MPa, but has a tensile strength of only about 80MPa, and has the characteristic of compression resistance and no tensile strength. The rotor with smaller diameter is generally adopted in the design of the rotor of the air compressor, so that the tensile damage of centrifugal force to the permanent magnet under the condition of super high speed is reduced. However, in order to satisfy the requirements of high pressure ratio and large flow rate of air supply and output, i.e. high power output of the motor, and ensure that the motor has sufficient torque output, and also require that the motor rotor has a sufficiently large diameter, it can be seen from the above that the size design requirement of the motor rotor-spindle structure is very high.
In addition, in order to increase the output of the centrifugal compressor, the rotor of the centrifugal air compressor is generally required to be operated at an ultra-high speed of 100,000rpm or more, and in the case of the same speed operation of the rotor and the main shaft, a higher requirement is imposed on the bearing supported by the main shaft rotating at a high speed. In the related art, the oil lubrication bearing is difficult to avoid oil leakage, and the oil leakage will enter the inside of the fuel cell engine to affect the electrochemical reaction of the fuel cell. Therefore, oil-free bearing support is the best choice for air compressors, and foil air bearings are more suitable for use in high speed light air compressor applications than other types of bearings.
Air compressor carries on whole car, and NVH performance requirement to the complete machine is higher and higher, requires that the dynamic balance of on-vehicle air compressor rotor subassembly reaches very low level, simultaneously, at high rotational speed operation in-process, can not rotate relatively (or remove) between the rotor subassembly internals, otherwise can cause the change of dynamic balance volume, the problem of unbalanced noise appears. In the related art, the magnet is generally fixed using glue.
The related rotor assembly of the fuel cell air compressor can stably operate when the working rotating speed is about 100,000 rpm. However, when the rotation speed is increased to 150,000rpm or more, there is a risk of relative rotation between the magnet and the shaft and between the bearing sleeve and the shaft, and the relative rotation may cause phase change of an unstable balance amount of the component, and further cause deterioration of dynamic balance of the rotor assembly, and may cause performance degradation and NVH noise problems.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model aims at providing a rotor system, simple structure, inertia are little, can keep air compressor to have lower noise lastingly, and NVH performance is good.
The utility model discloses still provide one kind and have rotor system's air compressor.
In order to achieve the above purpose, the technical scheme of the utility model is realized like this:
according to the utility model discloses rotor system of first aspect embodiment includes: a rotor shaft; the pinch roller is sleeved on the rotor shaft; the magnetic rotor is sleeved on the rotor shaft; the bearing sleeve comprises a first bearing sleeve and a second bearing sleeve, the first bearing sleeve and the second bearing sleeve are respectively sleeved on the rotor shaft, and two opposite end faces of the first bearing sleeve and the second bearing sleeve are respectively abutted against two end faces of the magnetic rotor; and the thrust bearing is sleeved on the rotor shaft and is positioned between the pressing wheel and the first bearing sleeve in the axial direction of the rotor shaft.
According to the utility model discloses rotor system, through making the magnetism rotor press from both sides tightly between first bearing sleeve and second bearing sleeve, magnetism rotor and first bearing sleeve have been increased, the static friction between magnetism rotor and the second bearing sleeve, can prevent magnetism rotor and first bearing sleeve when high-speed operation, take place relative rotation between magnetism rotor and the second bearing sleeve, keep axial pretightning force throughout cold and hot alternation in-process, dynamic balance stability under high rotational speed is good, thereby simple structure, inertia is little, can keep air compressor to have lower noise lastingly, guarantee air compressor's NVH performance.
According to some embodiments of the present invention, the bearing sleeve is provided with a friction increasing hole on the end surface against which the magnetic rotor is abutted.
In some embodiments of the present invention, the friction-increasing hole penetrates both end surfaces of the bearing sleeve.
In some embodiments of the present invention, an elastic pad is disposed in the friction-increasing hole, and the end surface of the magnetic rotor abuts against the elastic pad.
According to some embodiments of the invention, the thrust bearing comprises: a thrust bearing housing having a thrust cavity; the thrust rotor is sleeved on the rotor shaft and is rotatably matched in the thrust cavity, a gap is formed between the end face of the thrust rotor and the inner wall of the thrust cavity, a shaft seal is arranged between the thrust rotor and the pressing wheel, and the shaft seal is sleeved on the rotor shaft.
In some embodiments of the invention, the rotor system further comprises: the first magnetic rotating body and the second magnetic rotating body are respectively sleeved on the rotor shaft and are positioned on two sides of the thrust rotor; the thrust cavity is provided with a through rotating shaft hole, the rotor shaft is rotatably arranged in the rotating shaft hole, the first magnetic stator and the second magnetic stator are respectively matched in the rotating shaft hole and arranged around the rotor shaft, the homopolar of the first magnetic stator is opposite to that of the first magnetic rotor and is spaced from the rotor shaft, and the homopolar of the second magnetic stator is opposite to that of the second magnetic rotor and is spaced from the rotor shaft.
According to some embodiments of the utility model, the telescopic outside of first bearing with the telescopic outside of second bearing is equipped with journal bearing respectively, journal bearing includes: a bearing support; an air bearing fitted within the bearing mount.
According to some embodiments of the invention, the magnetic rotor comprises: the permanent magnet is sleeved on the rotor shaft and distributed along the axial direction of the rotor shaft.
According to some embodiments of the invention, the magnetic rotor further comprises: the fiber layer is sleeved on the outer side of the magnetic rotor.
According to the utility model discloses air compressor of second aspect embodiment, include according to the utility model discloses the rotor system of first aspect embodiment.
According to the utility model discloses air compressor utilizes above-mentioned rotor system, can prevent to take place relative rotation between magnetic rotor and first bearing sleeve, magnetic rotor and the second bearing sleeve when high-speed operation, keeps the axial pretightning force throughout at cold and hot alternation in-process, and dynamic balance stability under high rotational speed is good to simple structure, inertia are little, can keep air compressor to have lower noise, guarantee air compressor's NVH performance lastingly.
Drawings
The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. In the drawings:
fig. 1 is a schematic structural view of a rotor system according to an embodiment of the present invention;
fig. 2 is a schematic structural view of a rotor system according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a rotor system according to an embodiment of the present invention.
Description of reference numerals:
a rotor system 10, an elastic pad 11, a first fastening nut 12, a second fastening nut 13, a shaft seal 14,
A friction increasing hole 401, a first bearing sleeve 410, a second bearing sleeve 420,
Thrust bearing 500, thrust bearing housing 510, thrust rotor 520,
Radial bearing 600, bearing support 610, air bearing 620, stator 700, cooling water course 800.
Detailed Description
It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.
The present invention will be described in detail with reference to fig. 1 to 3 in conjunction with the embodiments.
As shown in fig. 1 to 3, a rotor system 10 according to an embodiment of the first aspect of the present invention includes: rotor shaft 100, pinch roller 200, magnetic rotor 300, bearing sleeve, and thrust bearing 500.
Specifically, the pressing wheel 200 is sleeved on the rotor shaft 100, and the magnetic rotor 300 is sleeved on the rotor shaft 100. The bearing sleeve comprises a first bearing sleeve 410 and a second bearing sleeve 420, the first bearing sleeve 410 and the second bearing sleeve 420 are respectively sleeved on the rotor shaft 100, two opposite end faces of the first bearing sleeve 410 and the second bearing sleeve 420 are respectively abutted against two end faces of the magnetic rotor 300, namely, the magnetic rotor 300 is respectively in surface contact with the first bearing sleeve 410 and the second bearing sleeve 420. Thrust bearing 500 is fitted over rotor shaft 100, and thrust bearing 500 is located between pressure wheel 200 and first bearing sleeve 410 in the axial direction of rotor shaft 100.
For example, the rotor shaft 100 is sleeved with the pressing wheel 200, the thrust bearing 500, the first bearing sleeve 410, the magnetic rotor 300, and the second bearing sleeve 420 in sequence from front to back. The front end surface of the magnetic rotor 300 abuts against the rear end surface of the first bearing sleeve 410, and the rear end surface of the magnetic rotor 300 abuts against the front end surface of the second bearing sleeve 420. In operation, the magnetic rotor 300 bears a rotational torque, and the mating surfaces of the magnetic rotor 300 and the first bearing sleeve 410 and the magnetic rotor 300 and the second bearing sleeve 420 do not rotate relatively under the static friction force.
According to the utility model discloses rotor system 10, through making magnetism rotor 300 press from both sides tightly between first bearing sleeve 410 and second bearing sleeve 420, magnetism rotor 300 and first bearing sleeve 410 have been increased, static friction force between magnetism rotor 300 and the second bearing sleeve 420, can prevent that magnetism rotor 300 and first bearing sleeve 410 from taking place relative rotation between magnetism rotor 300 and the second bearing sleeve 420 when high-speed operation, keep axial pretightning force throughout cold and hot alternation in-process, dynamic balance stability under high rotational speed is good, thereby simple structure, inertia is little, can keep air compressor to have lower noise lastingly, guarantee air compressor's NVH performance.
According to some embodiments of the present invention, as shown in fig. 1, the rotor system 10 further comprises: a first fastening nut 12 and a second fastening nut 13, the first fastening nut 12 being screw-fitted with the rotor shaft 100 to compress the pressing wheel 200, the second fastening nut 13 being screw-fitted with the rotor shaft 100 to compress the second bearing sleeve 420. Wherein the first fastening nut 12 is mounted on the front end of the rotor shaft 100 and the second fastening nut 13 is mounted on the rear end of the rotor shaft 100.
In this way, the magnetic rotor 300 and the first bearing sleeve 410, the magnetic rotor 300 and the second bearing sleeve 420 can be pressed against each other by screwing the first fastening nut 12 and the second fastening nut 13, so that static friction between the first bearing sleeve 410 and the magnetic rotor 300, between the magnetic rotor 300 and the second bearing sleeve 420, and between the second bearing sleeve 420 and the second fastening nut 13 is large enough, relative rotation is not generated between parts during high-speed operation, and axial pretightening force is always kept in a cold-hot alternating process, so that looseness among the first bearing sleeve 410, the magnetic rotor 300, the second bearing sleeve 420, and the second fastening nut 13 is prevented.
According to some embodiments of the present invention, as shown in fig. 1, at least one end surface of the first bearing sleeve 410 is provided with a friction increasing hole 401. For example, the rear end surface of the first bearing sleeve 410 is provided with a friction increasing hole 401, the friction increasing hole 401 may be a groove with an open rear end, and the friction increasing hole 401 may also be a through hole; for another example, the front and rear end surfaces of the first bearing sleeve 410 are respectively provided with friction increasing holes 401.
In this way, the weight of the first bearing sleeve 410 can be reduced, and the surface pressure is generated at the mating surface of the first bearing sleeve 410 and the magnetic rotor 300 by the moment of the second fastening nut 13, so that the contact area between the first bearing sleeve 410 and the magnetic rotor 300 is reduced due to the friction increasing hole 401, the deformation amount is increased, and the static friction force at the mating surface of the first bearing sleeve 410 and the magnetic rotor 300 can be further increased due to the increase in the deformation amount. In operation, the magnetic rotor 300 is subjected to a rotational torque, and the mating surfaces of the first bearing sleeve 410 and the magnetic rotor 300 do not rotate relative to each other under the static friction force.
In some embodiments of the present invention, as shown in fig. 1, the friction increasing holes 401 penetrate both end faces (e.g., front and rear end faces) of the first bearing sleeve 410. In this way, the static friction force at both end surfaces (e.g., at the front and rear end surfaces) of the first bearing sleeve 410 can be further increased.
In some embodiments of the present invention, as shown in fig. 1, at least one end surface of the second bearing sleeve 420 is provided with friction enhancing holes 401. For example, the front end surface of the second bearing sleeve 420 is provided with the friction increasing hole 401, the friction increasing hole 401 may be a groove with an open front end, and the friction increasing hole 401 may also be a through hole; for another example, the front and rear end surfaces of the second bearing sleeve 420 are respectively provided with friction increasing holes 401.
In this way, the weight of the second bearing sleeve 420 can be reduced, and the surface pressure is generated on the mating surface of the second bearing sleeve 420 and the magnetic rotor 300 by the moment of the second fastening nut 13, and the contact area between the second bearing sleeve 420 and the magnetic rotor 300 is reduced due to the existence of the friction increasing hole 401, the deformation amount is increased, and the increase of the deformation amount can further increase the static friction force on the mating surface of the second bearing sleeve 420 and the magnetic rotor 300. In operation, the magnetic rotor 300 is subjected to a rotational torque, and the mating surfaces of the second bearing sleeve 420 and the magnetic rotor 300 do not rotate relative to each other under the static friction force.
In some embodiments of the present invention, as shown in fig. 1, the friction increasing holes 401 penetrate both end surfaces (e.g., front and rear end surfaces) of the second bearing sleeve 420. In this way, the static friction force at both end surfaces (e.g., front and rear end surfaces) of the second bearing sleeve 420 can be further increased.
Alternatively, the friction increasing holes 401 may be plural, and the plural friction increasing holes 401 are uniformly formed on the first bearing sleeve 410 and the second bearing sleeve 420, respectively, so that the friction increasing and weight reducing effects are better.
In some embodiments of the present invention, as shown in fig. 1, an elastic pad 11 is disposed in the friction-increasing hole 401, and the end surface of the magnetic rotor 300 abuts against the elastic pad 11. For example, the elastic pad 11 provided in the friction increasing hole 401 of the first bearing sleeve 410 abuts against the front end surface of the magnetic rotor 300, and the elastic pad 11 provided in the friction increasing hole 401 of the second bearing sleeve 420 abuts against the rear end surface of the magnetic rotor 300. In this way, relative rotation between the magnetic rotor 300 and the first bearing sleeve 410 and between the magnetic rotor 300 and the second bearing sleeve 420 can be further prevented.
According to some embodiments of the present invention, as shown in fig. 2, each of the first and second bearing sleeves 410, 420 is clearance fit or transition fit with the rotor shaft 100. That is, first bearing sleeve 410 is clearance fit or transition fit with rotor shaft 100 and second bearing sleeve 420 is clearance fit or transition fit with rotor shaft 100. In this way, smooth installation of the first and second bearing sleeves 410 and 420 may be facilitated.
According to some embodiments of the present invention, as shown in fig. 2, the thrust bearing 500 comprises: a thrust bearing housing 510 and a thrust rotor 520. The thrust bearing housing 510 has a thrust cavity. The thrust rotor 520 is sleeved on the rotor shaft 100, the thrust rotor 520 is rotatably matched in the thrust cavity, and a gap is formed between the end face of the thrust rotor 520 and the inner wall of the thrust cavity. In this way, the thrust bearing 500 has a certain elasticity, and when a certain rotation speed is reached, the gap between the thrust runner 520 and the thrust bearing housing 510 can prevent the wear between the thrust bearing housing 510 and the thrust runner 520. For example, the longitudinal section of the thrust chamber is configured in a U-shape.
In some embodiments of the present invention, as shown in fig. 2, a shaft seal 14 is disposed between the thrust rotor 520 and the pressing wheel 200, and the shaft seal 14 is sleeved on the rotor shaft 100. Thus, the shaft seal 14 is abutted against the thrust runner 520 and the pressure wheel 200 respectively, so that relative rotation is avoided, a sealing effect can be achieved, and the structure is compact.
In some embodiments of the present invention, the rotor system 10 further comprises: the magnetic rotor comprises a first magnetic rotor, a second magnetic rotor, a first magnetic stator and a second magnetic stator.
Specifically, the first magnetic rotator and the second magnetic rotator are respectively sleeved on the rotor shaft 100, and the first magnetic rotator and the second magnetic rotator are respectively located at two sides of the thrust rotor 520. The thrust chamber has a through-going shaft hole, the rotor shaft 100 is rotatably disposed in the shaft hole, the first magnetic stator and the second magnetic stator are respectively fitted in the shaft hole, and the first magnetic stator and the second magnetic stator are respectively disposed around the rotor shaft 100.
The first magnetic stator and the first magnetic rotator are opposite to each other in the same pole, and are spaced apart from the rotor shaft 100. The second magnetic stator is homopolar-opposite to the second magnetic rotor, and the second magnetic stator and the second magnetic rotor are spaced apart from the rotor shaft 100, respectively. The first magnetic rotor, the second magnetic rotor, the first magnetic stator, and the second magnetic stator may be permanent magnets, respectively.
For example, the shaft bore extends through both left and right side walls of the thrust chamber, the first magnetic swivel is located on the left side of the thrust rotor 520, and the second magnetic swivel is located on the right side of the thrust rotor 520. The first magnetic rotor, the second magnetic rotor, the first magnetic stator and the second magnetic stator are respectively annular, and the inner diameter of the first magnetic stator and the inner diameter of the second magnetic stator are respectively larger than the diameter of the rotor shaft 100. The right end of the first magnetic stator is an S pole, and the left end of the first magnetic rotator is an S pole; the left end of the second magnetic stator is an N pole, and the right end of the second magnetic rotator is an N pole.
In this way, the magnetic force can be used to counteract the axial force, so as to prevent the thrust rotor 520 from contacting the thrust bearing housing 510, prolong the service life of the thrust bearing 500, reduce the heat generated by friction and the friction power consumption, and improve the performance of the rotor system 10.
According to some embodiments of the present invention, as shown in fig. 2, the outer side of the first bearing sleeve 410 and the outer side of the second bearing sleeve 420 are respectively sleeved with a radial bearing 600. In this way, the rotor shaft 100 can be supported.
Further, the radial bearing 600 includes: bearing support 610 and air bearing 620. Air bearing 620 fits within bearing mount 610. In this way the structure is more reliable.
According to some embodiments of the present invention, as shown in fig. 3, the magnetic rotor 300 may include a plurality of permanent magnets 310. The permanent magnets 310 are hollow pieces, each permanent magnet 310 is sleeved on the rotor shaft 100, and the permanent magnets 310 are distributed along the axial direction of the rotor shaft 100.
For example, the permanent magnets 310 may adopt a two-stage parallel magnetizing structure, in which two permanent magnets 310 are sequentially sleeved on the rotor shaft 100 along the front-back direction, and the two permanent magnets 310 are compressed between the first bearing sleeve 410 and the second bearing sleeve 420 by tightening the second fastening nut 13.
Thus, the two-segment structure can effectively increase the eddy current loop resistance on the surface of the permanent magnet 310, thereby suppressing the eddy current loss of the harmonic magnetic field in the air gap on the surface of the permanent magnet 310. And the parallel magnetization can improve the sine property of the air gap magnetic field, further weaken the air gap harmonic magnetic field, and also weaken the eddy current loss on the surface of the permanent magnet 310, thereby improving the efficiency of the motor, reducing the temperature of the magnetic rotor 300 and prolonging the service life of the permanent magnet 310.
In the related art, there are two general types of rotor structures of permanent magnet motors, one is surface-mounted type, and the other is embedded type. The embedded type is that the magnetic steel is embedded into the iron core by various methods, and a ferromagnetic material exists between two adjacent magnetic steels, so that the magnetic leakage coefficient of the rotor is increased, and the efficiency of the motor is reduced. The surface-mounted type is to fix the magnetic steel to the surface of the iron core by various ways. Above two kinds of modes all need prepare materials such as iron core and play the effect of fixed magnet steel, not only can make the cost increase also can lead to the assembly difficulty like this.
To this end, according to some embodiments of the present invention, as shown in fig. 3, the magnetic rotor 300 further includes: a fibrous layer 320. The fiber layer 320 is fitted around the outside of the magnetic rotor 300. That is, the magnetic rotor 300 is fixed to the rotor shaft 100 by wrapping the magnetic rotor 300 with the fiber layer 320.
Wherein, a stator 700 is provided at the outer side of the magnetic rotor 300, and a cooling water channel 800 is provided around the stator 700, and the cooling water channel 800 may perform a cooling function.
For example, the magnetic rotor 300 includes a plurality of permanent magnets 310, a first bearing sleeve 410 is first installed on the front end of the rotor shaft 100, then the plurality of permanent magnets 310 wrapped by a fiber layer 320 are sleeved on the rotor shaft 100 and adjacent to the first bearing sleeve 410, finally a second bearing sleeve 420 is installed on the rotor shaft 100, and finally the second bearing sleeve 420 is compressed by a second fastening nut 13 to fix the magnetic rotor 300, so that relative rotation does not occur between the magnetic rotor 300 and the first bearing sleeve 410, and between the magnetic rotor 300 and the second bearing sleeve 420.
Therefore, an iron core for fixing the magnetic steel can be omitted, the space utilization rate of the permanent magnet material is improved, and the permanent magnets 310 can be placed in a limited space as much as possible, so that the power density of the motor is improved, and the motor can stably run at an ultrahigh rotating speed. And the fiber layer 320 can enable the air compressor to reach higher rotating speed, simultaneously save the space of the air compressor and enable the structure to be more compact.
In some embodiments of the present invention, as shown in fig. 3, the fiber layer 320 is a carbon fiber piece. Thus, the carbon fiber has the advantages of high tensile strength and low density, so that higher rotating speed can be achieved; meanwhile, the air gap space of the motor is saved, so that the structure of the motor is more compact; in addition, the density and the conductivity of the carbon fiber are small, so that the eddy current loss of a harmonic magnetic field in the air gap of the motor on the surface of the fiber layer 320 can be effectively inhibited, the efficiency of the motor is further improved, and the weight of the whole machine is reduced.
According to a second aspect of the present invention, an air compressor includes a rotor system 10 according to the first aspect of the present invention.
According to the utility model discloses air compressor utilizes above-mentioned rotor system, can prevent to take place relative rotation between magnetic rotor 300 and first bearing sleeve 410, magnetic rotor 300 and the second bearing sleeve 420 when high-speed operation, keeps the axial pretightning force throughout in cold and hot alternation process, and dynamic balance stability under high rotational speed is good to simple structure, inertia are little, can keep air compressor to have lower noise, guarantee air compressor's NVH performance lastingly.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A rotor system, comprising:
a rotor shaft;
the pinch roller is sleeved on the rotor shaft;
the magnetic rotor is sleeved on the rotor shaft;
the bearing sleeve comprises a first bearing sleeve and a second bearing sleeve, the first bearing sleeve and the second bearing sleeve are respectively sleeved on the rotor shaft, and two opposite end faces of the first bearing sleeve and the second bearing sleeve are respectively abutted against two end faces of the magnetic rotor;
and the thrust bearing is sleeved on the rotor shaft and is positioned between the pressing wheel and the first bearing sleeve in the axial direction of the rotor shaft.
2. The rotor system of claim 1, wherein the end surface of the bearing sleeve that abuts the magnetic rotor is provided with friction enhancing holes.
3. The rotor system of claim 2, wherein the friction enhancing holes extend through both end faces of the bearing sleeve.
4. The rotor system of claim 2, wherein an elastic pad is disposed in the friction increasing hole, and an end surface of the magnetic rotor abuts against the elastic pad.
5. The rotor system of claim 1, wherein the thrust bearing comprises:
a thrust bearing housing having a thrust cavity;
the thrust rotor is sleeved on the rotor shaft and is rotatably matched in the thrust cavity, a gap is formed between the end face of the thrust rotor and the inner wall of the thrust cavity, a shaft seal is arranged between the thrust rotor and the pressing wheel, and the shaft seal is sleeved on the rotor shaft.
6. The rotor system of claim 5, further comprising:
the first magnetic rotating body and the second magnetic rotating body are respectively sleeved on the rotor shaft and are positioned on two sides of the thrust rotor;
the thrust cavity is provided with a through rotating shaft hole, the rotor shaft is rotatably arranged in the rotating shaft hole, the first magnetic stator and the second magnetic stator are respectively matched in the rotating shaft hole and arranged around the rotor shaft, the homopolar of the first magnetic stator is opposite to that of the first magnetic rotor and is spaced from the rotor shaft, and the homopolar of the second magnetic stator is opposite to that of the second magnetic rotor and is spaced from the rotor shaft.
7. The rotor system of claim 1, wherein the outer side of the first bearing sleeve and the outer side of the second bearing sleeve are each sleeved with a radial bearing, the radial bearings comprising:
a bearing support;
an air bearing fitted within the bearing mount.
8. The rotor system of any one of claims 1-7, wherein the magnetic rotor comprises:
the permanent magnet is sleeved on the rotor shaft and distributed along the axial direction of the rotor shaft.
9. The rotor system of claim 8, wherein the magnetic rotor further comprises:
the fiber layer is sleeved on the outer side of the magnetic rotor.
10. An air compressor comprising a rotor system according to any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020127007.0U CN211623753U (en) | 2020-01-20 | 2020-01-20 | Rotor system and air compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020127007.0U CN211623753U (en) | 2020-01-20 | 2020-01-20 | Rotor system and air compressor |
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| Publication Number | Publication Date |
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| CN211623753U true CN211623753U (en) | 2020-10-02 |
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| CN202020127007.0U Active CN211623753U (en) | 2020-01-20 | 2020-01-20 | Rotor system and air compressor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112628281A (en) * | 2020-11-09 | 2021-04-09 | 珠海格力电器股份有限公司 | Air-bearing rotor system and motor |
| WO2023162172A1 (en) * | 2022-02-25 | 2023-08-31 | 三菱重工エンジン＆ターボチャージャ株式会社 | Rotor, rotary electrical machine, electric compressor, and method for producing rotor |
-
2020
- 2020-01-20 CN CN202020127007.0U patent/CN211623753U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112628281A (en) * | 2020-11-09 | 2021-04-09 | 珠海格力电器股份有限公司 | Air-bearing rotor system and motor |
| CN112628281B (en) * | 2020-11-09 | 2022-02-22 | 珠海格力电器股份有限公司 | Air-bearing rotor system and motor |
| WO2023162172A1 (en) * | 2022-02-25 | 2023-08-31 | 三菱重工エンジン＆ターボチャージャ株式会社 | Rotor, rotary electrical machine, electric compressor, and method for producing rotor |
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