CN112467932A - High-speed fan with hybrid support of air bearing and magnetic bearing - Google Patents
High-speed fan with hybrid support of air bearing and magnetic bearing Download PDFInfo
- Publication number
- CN112467932A CN112467932A CN202011178968.5A CN202011178968A CN112467932A CN 112467932 A CN112467932 A CN 112467932A CN 202011178968 A CN202011178968 A CN 202011178968A CN 112467932 A CN112467932 A CN 112467932A
- Authority
- CN
- China
- Prior art keywords
- bearing
- speed motor
- axial
- magnetic bearing
- motor rotor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/08—Structural association with bearings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/06—Units comprising pumps and their driving means the pump being electrically driven
- F04D25/0606—Units comprising pumps and their driving means the pump being electrically driven the electric motor being specially adapted for integration in the pump
- F04D25/0613—Units comprising pumps and their driving means the pump being electrically driven the electric motor being specially adapted for integration in the pump the electric motor being of the inside-out type, i.e. the rotor is arranged radially outside a central stator
- F04D25/062—Details of the bearings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/05—Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
- F04D29/056—Bearings
- F04D29/057—Bearings hydrostatic; hydrodynamic
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/05—Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
- F04D29/056—Bearings
- F04D29/058—Bearings magnetic; electromagnetic
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
- H02K11/21—Devices for sensing speed or position, or actuated thereby
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/08—Structural association with bearings
- H02K7/083—Structural association with bearings radially supporting the rotary shaft at both ends of the rotor
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/08—Structural association with bearings
- H02K7/09—Structural association with bearings with magnetic bearings
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/14—Structural association with mechanical loads, e.g. with hand-held machine tools or fans
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Fluid Mechanics (AREA)
- Magnetic Bearings And Hydrostatic Bearings (AREA)
Abstract
The invention discloses a high-speed fan with hybrid support of an air bearing and a magnetic bearing. The device comprises a volute, a main shell, a high-speed motor stator, a high-speed motor rotor, a radial air suspension bearing, an axial magnetic bearing, a displacement sensor and an axial magnetic bearing controller, wherein the high-speed motor stator, the high-speed motor rotor, the radial air suspension bearing, the axial magnetic bearing, the displacement sensor and the axial magnetic bearing controller are arranged in the main; the volute is connected to the main shell; the high-speed motor rotor is rotatably arranged in the main shell, and one end of the high-speed motor rotor extends into the volute; the impeller is connected to the high-speed motor rotor and located inside the volute, and the high-speed motor stator is connected inside the main shell; the radial air suspension bearing is used for radially supporting the high-speed motor rotor; the axial magnetic bearing is used for axially positioning the high-speed motor rotor and preventing the high-speed motor rotor from axially moving; the displacement sensor is used for detecting a moving signal of the high-speed motor rotor in the axial direction of the high-speed motor rotor, transmitting the signal to the axial magnetic bearing controller, and controlling the axial magnetic bearing to enable the high-speed motor rotor to reset. The high-speed fan has the advantages of compact structure, high reliability and simple control.
Description
Technical Field
The invention relates to the technical field of high-speed extension machines, in particular to a high-speed fan with hybrid support of an air floating bearing and a magnetic floating bearing.
Background
The high-speed fan has the advantages of high rotating speed, high power density, energy conservation, high efficiency, small volume, light weight, less manufacturing materials and the like, is more and more attractive and favored, is one of the hot points of research in the field of high-speed turbomachinery, and is widely used in the fields of centrifugal blowers, compressors, organic Rankine cycle power generation, hydrogen fuel cells, aerospace and the like at present. The high-speed fan has high motor rotating speed, the linear speed of the surface of a motor rotor is as high as 200m/s, and the traditional mechanical bearing is difficult to ensure the stable operation of the fan at the high rotating speed. The friction and the vibration of the mechanical bearing can cause the bearing to generate heat and noise seriously, and can lead to the problems of bearing grinding, precision reduction, motor rotor eccentricity and the like seriously when the bearing is serious, thereby seriously influencing the safe and stable operation of the fan. In order to eliminate friction, an air suspension bearing and a magnetic suspension bearing without mechanical friction are widely used, and the motors adopted by the existing high-speed fans are divided into two structures, namely an air suspension high-speed motor and a magnetic suspension high-speed motor.
The basic structure of the air suspension high-speed fan comprises an impeller, a volute, a high-speed motor stator, a rotor, a radial air suspension bearing, an axial air bearing and the like. The two ends of the motor are provided with radial air suspension bearings which play a role in radially supporting the motor rotor; the axial air bearing generates axial force to the motor rotor, plays a role in axial positioning and prevents the motor rotor from axially moving. Particularly for turbine machinery, the three-dimensional flow impeller generates axial tension on the rotor when rotating at high speed. The air suspension bearing has the advantages of simple structure, small volume, low cost and the like, and is widely used, but the air bearing has extremely high requirement on the processing precision, no matter the air bearing is a radial air bearing or an axial air bearing, the requirement on the processing precision of the bearing areas corresponding to the air bearing seat and the rotor is extremely high, the gap between the air bearing seat and the rotor is about 0.02mm, and the gap data is slightly different according to different loads and rotating speeds. And the air bearing is sensitive to axial and radial impact forces. Although the air bearing can realize frictionless high-speed operation of a high-speed motor rotor, due to the characteristics of the air bearing, the safe and stable operation of the motor has certain hidden dangers, and the air bearing is mainly sensitive to impact force. The reason is that the air bearing is mostly an elastic foil structure, the surface of the foil is provided with a wear-resistant coating, and the rotor and the elastic foil of the air bearing are very easy to rub under the action of impact force due to the fact that the gap between the rotor and the bearing seat is small, the wear-resistant coating is damaged, the air bearing is heated, and the air bearing is damaged due to irreversible damage. Especially, in turbo machinery, equipment surge, and changes of working conditions such as pressure, flow and motor rotating speed of fluid easily cause sudden changes of axial force of a motor rotor, the axial force and the working conditions are exponentially changed, and an axial air suspension bearing is easily damaged. For high-speed centrifugal blowers and aeration blowers in the sewage treatment industry, the problems of equipment surge, unstable load and the like caused by the start and stop of the blowers or the change of water depth are solved, and the axial air bearing of the air suspension blower is seriously examined and is the most easily damaged part. Radial force on the circumference of the three-dimensional flow impeller is balanced, the working condition change can not generate radial force, and radial impact can be ignored.
The basic structure of the magnetic suspension high-speed fan comprises an impeller, a volute, a high-speed motor stator, a rotor, a radial magnetic bearing, an axial magnetic bearing, a magnetic bearing controller, an auxiliary protection bearing and the like. The magnetic suspension motor is usually controlled in five degrees of freedom, a motor rotor is suspended by electromagnetic force generated by radial magnetic bearings at the front end and the rear end, and the axial positioning of the motor rotor is realized through an axial magnetic bearing in the axial direction. The magnetic suspension bearing has the advantages of large supporting force, controllable motor rotor position and the like, and is widely adopted. However, the radial magnetic bearing of the magnetic suspension motor has a complex structure, larger volume than that of an air suspension bearing and high manufacturing cost, and a magnetic suspension bearing controller is required to be equipped to control the motor rotor with five degrees of freedom, the control system has multivariable and strong coupling, the requirement on the electric control technology is high, and the control difficulty is high. The turbomachinery is characterized in that the change of working conditions such as fluid pressure, flow, motor speed and the like hardly generates radial impact force, and the radial acting force of the working condition change on a rotor can be ignored; however, the axial force is suddenly changed due to the change of the working condition and is changed exponentially, and the axial acting force on the motor rotor cannot be ignored. Other problems such as surging and the like have small influence on the radial direction and large influence on the axial force of the motor rotor of the equipment.
Disclosure of Invention
The invention aims to provide a high-speed fan with a hybrid support of an air suspension bearing and a magnetic suspension bearing. The radial bearing of the motor of the high-speed fan is an air suspension bearing, and the radial impact force is not generated when the working condition is changed, so that the advantages of small volume, simple structure, low manufacturing cost and the like of the air suspension bearing are fully exerted; the axial bearing is a magnetic suspension bearing, the advantages of large bearing capacity, high controllability of the position of a rotor and the like of the magnetic suspension bearing are fully exerted when the working condition changes, the problems of low bearing capacity, poor adaptability and the like of the air suspension bearing are solved, and the safety and the reliability of the operation of the fan are greatly improved; compared with a five-degree-of-freedom magnetic suspension fan, the high-speed fan only needs to control one degree of freedom of the rotor axial direction, and is single in control variable, simple in control system and high in reliability.
The invention is realized by the following technical scheme:
a high-speed fan with hybrid support of an air bearing and a magnetic bearing is characterized by comprising a volute, a main shell, a high-speed motor stator, a high-speed motor rotor, a radial air suspension bearing, an axial magnetic bearing, a displacement sensor and an axial magnetic bearing controller, wherein the high-speed motor stator, the high-speed motor rotor, the radial air suspension bearing, the axial magnetic bearing, the displacement sensor and the axial magnetic bearing controller are arranged in the main shell; the volute is connected to the main shell and communicated with the main shell; the high-speed motor rotor is rotatably arranged inside the main shell, and one end of the high-speed motor rotor extends into the volute; the impeller is connected to the high-speed motor rotor and located inside the volute, and the high-speed motor stator is fixedly connected inside the main shell and surrounds the high-speed motor rotor; the radial air suspension bearing is used for radially supporting the high-speed motor rotor; the axial magnetic bearing is used for axially positioning the high-speed motor rotor and preventing the high-speed motor rotor from axially moving; the displacement sensor is used for detecting a moving signal of the high-speed motor rotor in the axial direction of the high-speed motor rotor, transmitting the moving signal to the axial magnetic bearing controller, and controlling the axial magnetic bearing through the axial magnetic bearing controller to enable the high-speed motor rotor to reset. Specifically, the high-speed fan adopts the radial air suspension bearing, and the radial impact force is not generated on the high-speed motor rotor due to the change of working conditions, so that the radial air suspension bearing can reliably and stably operate under the condition of changing the working conditions; the radial air suspension bearing has the advantages of small volume, simple structure, low cost and the like; meanwhile, the axial bearing of the high-speed fan is a magnetic suspension bearing, a displacement sensor is arranged in the motor to monitor the axial position of the rotor of the high-speed motor in real time, when the surge of the fan or the sudden change of working conditions generates axial force to cause the sudden change of the displacement of the rotor, a displacement signal is fed back to the axial magnetic bearing controller in real time, and the axial magnetic bearing controller controls the axial magnetic bearing to forcibly pull the rotor of the high-speed motor back to the middle position of the axial magnetic bearing (even if the axial magnetic bearing generating the axial displacement is reset), so that the impact force generated on the rotor by the. The advantages of large bearing capacity, high controllability and the like of the magnetic bearing are exerted, the influence of axial force on the rotor is overcome, and the reliability and the stability of the operation of the high-speed fan are high.
Further, an end cover is arranged on the main shell; the end cover is connected to one end, far away from the volute, of the main shell.
Further, the displacement sensor is connected to the end cover; the displacement sensor is in electrical signal connection with the axial magnetic bearing controller.
Further, the radial aero-levitation bearing comprises a front end radial aero-levitation bearing and a rear end radial aero-levitation bearing; the front end radial air suspension bearing and the rear end radial air suspension bearing are respectively positioned on two sides of the high-speed motor stator. The front and rear radial bearings of the high-speed fan are air suspension bearings, and the high-speed fan is small in size, so that the overall radial size of the fan is short relative to a five-degree-of-freedom magnetic suspension fan, and the axial size of a fan rotor is short, so that the first-order modal frequency of the rotor is high, the rotating speed of the rotor can be designed to be higher relative to the five-degree-of-freedom magnetic suspension fan, and the advantages of small size, high power density, high efficiency and the like of the high.
Further, the axial magnetic bearing comprises a front axial magnetic bearing and a rear axial magnetic bearing; and a rotor axial thrust disc is arranged in the circumferential direction around the high-speed motor rotor and is positioned in a gap between the front-end axial magnetic bearing and the rear-end axial magnetic bearing. Specifically, the axial magnetic suspension bearing fully exerts the advantages of large bearing capacity, high corresponding speed, strong controllability and the like of the magnetic suspension bearing, and controls the axial thrust disc (rotor) of the rotor to be in the middle position of the axial magnetic bearing all the time, namely, the axial positioning effect is realized on the rotor of the high-speed motor, and the axial play of the rotor is prevented.
Furthermore, a front-end magnetic bearing coil and a rear-end magnetic bearing coil are respectively arranged on the front-end axial magnetic bearing and the rear-end axial magnetic bearing and are electrically connected with the axial magnetic bearing controller, and the rotor axial thrust disc is positioned between the front-end magnetic bearing coil and the rear-end magnetic bearing coil; the axial thrust disc of the rotor is made of magnetic materials. Specifically, when the blower surge or the operating condition change generates an axial pulling force to the front end of the high-speed motor rotor, the rotor axial displacement sensor detects that the rotor moves forward, the sensor transmits the signal to the axial magnetic bearing controller, then the axial magnetic bearing controller adjusts the current of the axial magnetic bearing coil, the current of the front end axial magnetic bearing coil is reduced, the current of the rear end axial magnetic bearing coil is increased, correspondingly, the electromagnetic pulling force of the front end axial magnetic bearing to the rotor thrust disc is reduced, the electromagnetic pulling force of the rear end axial magnetic bearing to the rotor axial thrust disc is increased, and the effect is that the high-speed motor rotor is forcibly pulled backward to the initial position (namely, the high-speed motor rotor is reset) through the rotor axial thrust disc. On the contrary, when the fan surges or the working condition changes and generates axial tension to the rotor at the rear end, the axial magnetic bearing controller adjusts the coil current, the electromagnetic tension of the front-end axial magnetic bearing to the rotor thrust disc is increased, the electromagnetic tension of the rear-end axial magnetic bearing to the rotor thrust disc is reduced, and then the rotor of the high-speed motor is forcibly pulled forward to the initial position through the rotor axial thrust disc to reset the high-speed motor; the axial force generated by the surging or the change of the working condition of the high-speed fan is reduced, so that the condition that the bearing in the axial direction is ground and damaged is avoided.
Further, the rotor axial thrust disc is fixedly connected to the high-speed motor rotor. The axial thrust disc of the rotor is more stable.
Further, a partition plate is arranged in the main shell; the baffle is connected to a side of the main housing adjacent to the impeller.
Compared with an air suspension fan, the high-speed fan has the advantages that the axial bearing is a magnetic suspension bearing, the axial bearing capacity is large, the response speed is high, the controllability is high, and the safe and reliable operation of the high-speed fan under various complex working conditions is ensured. Compared with a five-degree-of-freedom magnetic suspension fan, the radial bearing is an air suspension bearing, the structure and the manufacturing process are simple, the size is small, the cost is low, the high-speed fan rotor can be shortened, the fan rotating speed can be designed to be higher, and the advantages of high rotating speed, energy conservation, high efficiency, small size and the like of the high-speed fan are exerted. Meanwhile, only one axial degree of freedom needs to be controlled in the aspect of control, the control variable is single, the corresponding speed is high, the control system is simple, and the cost is low. The high-speed fan has the advantages of small overall size, low manufacturing cost, high reliability and safe and reliable operation under complex working conditions.
Compared with the prior art, the invention has the beneficial effects that:
(1) the radial bearing of the high-speed fan motor is an air suspension bearing, and the advantages of small volume, simple structure, low cost and the like of the air suspension bearing are fully exerted; the axial bearing of the high-speed fan is a magnetic suspension bearing, the advantages of large bearing capacity, high controllability of the position of a rotor and the like of the magnetic suspension bearing are fully exerted when the working condition changes, the problems of low bearing capacity, poor adaptability and the like of an air suspension bearing are solved, and the safety and the reliability of the operation of the fan are greatly improved; compared with a five-degree-of-freedom magnetic suspension fan, the high-speed fan only needs to control one axial degree of freedom of the rotor, the control variable is single, the control system is simple, and the reliability is high. The axial displacement sensor is arranged in the high-speed fan, so that the axial position information of the high-speed motor rotor can be fed back to the magnetic bearing controller in real time, and the axial position of the rotor is ensured.
(2) The five-freedom-degree magnetic suspension motor adopts a five-freedom-degree magnetic suspension bearing, although the electromagnetic bearing capacity is large and the position controllability of a rotor is high, the structure and the manufacturing process of a bearing supporting system are complex, the size is large, the cost is high, and a control system is multivariable and strongly coupled and is complex; according to the high-speed fan, the radial bearing is an air suspension bearing, and radial force is not generated by fan surging or working condition change, so that the advantages of simple structure, small size, low cost and the like are fully exerted; the axial bearing is a magnetic suspension bearing, so that the advantages of large bearing capacity, high controllability and the like of the magnetic bearing are exerted; compared with an air suspension high-speed fan, the axial bearing capacity is large, the controllability is good, and compared with a five-freedom-degree magnetic suspension high-speed fan, the radial bearing is small in size, simple in structure and low in cost; because the radial bearing is small in size, the fan rotor can be shortened, the mode is improved, the fan rotating speed can be designed to be higher, and the fan is more energy-saving and efficient; in the aspect of control, only one axial degree of freedom needs to be controlled, the control system has single variable, the control system is simple, the corresponding speed is high, and the cost is low.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a cross-sectional view of a high-speed fan with hybrid support of air-floating bearing and magnetic-floating bearing.
In the figure: 1 volute, 2 impeller, 3 high-speed motor stator, 4 high-speed motor rotor, 5 radial air suspension bearing, 6 axial magnetic bearing, 7 displacement sensor, 8 axial magnetic bearing controller, 9 main shell, 10 end cover, 11 rotor axial thrust disc, 12 front end radial air suspension bearing, 13 rear end radial air suspension bearing, 14 front end axial magnetic bearing, 15 rear end axial magnetic bearing, 16 front end magnetic bearing coil, 17 rear end magnetic bearing coil, 18 baffle.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and in the case of not making a reverse description, these orientation words do not indicate and imply that the device or element being referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be considered as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.
Examples
As shown in fig. 1, the high-speed fan with hybrid support of air-floating bearing and magnetic-floating bearing comprises a volute 1, a main housing 9, and a high-speed motor stator 3, a high-speed motor rotor 4, a radial air-floating bearing 5 (the radial air-floating bearing 5 includes a front-end radial air-floating bearing 12 and a rear-end radial air-floating bearing 13), an axial magnetic bearing 6 (the axial magnetic bearing 6 includes a front-end axial magnetic bearing 14 and a rear-end axial magnetic bearing 15), a displacement sensor 7, and an axial magnetic bearing controller 8, which are arranged inside the main housing 9; the volute 1 is connected to and communicated with the main shell 9; the high-speed motor rotor 4 is rotatably arranged inside the main shell 9, and one end of the high-speed motor rotor extends into the volute 1; the impeller 2 is connected to the high-speed motor rotor 4 and is positioned inside the volute 1, and the high-speed motor stator 3 is fixedly connected inside the main shell 9 and is arranged around the high-speed motor rotor 4; the radial air suspension bearing 5 (i.e. the front end radial air suspension bearing 12 and the rear end radial air suspension bearing 13) is used for radially supporting the high-speed motor rotor 4; the axial magnetic bearing 6 (i.e. the front-end axial magnetic bearing 14 and the rear-end axial magnetic bearing 15) is used for axially positioning the high-speed motor rotor 4 and preventing the high-speed motor rotor from axially moving; the displacement sensor 7 is configured to detect an axial movement signal of the high-speed motor rotor 4, transmit the movement signal to the axial magnetic bearing controller 8, and control the axial magnetic bearing 6 to reset the high-speed motor rotor 4 through the axial magnetic bearing controller 8.
Preferably, the main housing 9 in the above embodiment is provided with an end cap 10; the end cap 10 is attached to the end of the main housing 9 remote from the volute 1 (which may be referred to herein as the end of the high speed fan). The displacement sensor 7 is connected to the end cover 10; the displacement sensor 7 is in electrical signal connection with the axial magnetic bearing controller 8. Specifically, a rotor axial thrust disc 11 is arranged around the high-speed motor rotor 4 in the circumferential direction, the rotor axial thrust disc 11 is located in a gap between the front-end axial magnetic bearing 14 and the rear-end axial magnetic bearing 15, the front-end axial magnetic bearing 14 and the rear-end axial magnetic bearing 15 are respectively provided with a front-end magnetic bearing coil 16 and a rear-end magnetic bearing coil 17 and are in electrical signal connection with the axial magnetic bearing controller 8, and the rotor axial thrust disc 11 is located between the front-end magnetic bearing coil 16 and the rear-end magnetic bearing coil 17; the rotor axial thrust disc 11 is made of magnetic materials and is fixedly connected to the high-speed motor rotor 4. A partition plate 18 is further disposed on one side of the main casing 9 close to the impeller 2.
Specifically, when a fan surge or a working condition change generates a front-end axial tension on the high-speed motor rotor 4 in an actual working process of the high-speed fan, the displacement sensor 7 detects that the high-speed motor rotor 4 moves forward, the displacement sensor 7 transmits the signal to the axial magnetic bearing controller 8, the axial magnetic bearing controller 8 adjusts the current of the axial magnetic bearing coil, the current of the front-end magnetic bearing coil 16 is reduced, and the current of the rear-end magnetic bearing coil 17 is increased, so that the electromagnetic tension of the front-end axial magnetic bearing 14 on the rotor axial thrust disc 11 is reduced, and the electromagnetic tension of the rear-end axial magnetic bearing 15 on the rotor axial thrust disc 11 is increased, which has the effect that the high-speed motor rotor 4 is forcibly pulled back to an initial position (i.e. reset) by the driving of the rotor axial thrust disc 11. On the contrary, when the fan surge or the working condition change generates the axial tension to the rear end of the high-speed motor rotor 4, the axial magnetic bearing controller 8 adjusts the coil current to increase the electromagnetic tension of the front-end axial magnetic bearing 14 to the rotor thrust disc and decrease the electromagnetic tension of the rear-end axial magnetic bearing 15 to the rotor axial thrust disc 11, and then the rotor axial thrust disc 11 drives the high-speed motor rotor 4 to be forcibly pulled forward to the initial position to reset the high-speed motor rotor; the axial force generated by the surging or the change of the working condition of the high-speed fan is reduced, and the condition of grinding and damaging the bearing is avoided.
The above-mentioned preferred embodiments of the present invention are provided for illustration only and not for the purpose of limiting the invention. Obvious variations or modifications of the present invention are within the scope of the present invention.
Claims (8)
1. A high-speed fan with hybrid support of an air bearing and a magnetic bearing is characterized by comprising a volute (1), a main shell (9), and a high-speed motor stator (3), a high-speed motor rotor (4), a radial air bearing (5), an axial magnetic bearing (6), a displacement sensor (7) and an axial magnetic bearing controller (8) which are arranged in the main shell (9); the volute (1) is connected to the main shell (9) and communicated with the main shell; the high-speed motor rotor (4) is rotatably arranged inside the main shell (9), and one end of the high-speed motor rotor extends into the volute (1); the impeller (2) is connected to the high-speed motor rotor (4) and is positioned in the volute (1), and the high-speed motor stator (3) is fixedly connected to the inside of the main shell (9) and surrounds the high-speed motor rotor (4); the radial air suspension bearing (5) is used for radially supporting the high-speed motor rotor (4); the axial magnetic bearing (6) is used for axially positioning the high-speed motor rotor (4); the displacement sensor (7) is used for detecting a movement signal of the high-speed motor rotor (4) in the axial direction thereof, transmitting the movement signal to the axial magnetic bearing controller (8), and controlling the axial magnetic bearing (6) through the axial magnetic bearing controller (8) to reset the high-speed motor rotor (4).
2. The air-floating bearing and magnetic-floating bearing hybrid supported high-speed fan according to claim 1, wherein an end cover (10) is arranged on the main shell (9); the end cover (10) is connected to one end, far away from the volute (1), of the main shell (9).
3. The air-floating bearing and magnetic-floating bearing hybrid supported high-speed fan according to claim 2, wherein the displacement sensor (7) is connected to the end cover (10); the displacement sensor (7) is in electrical signal connection with the axial magnetic bearing controller (8).
4. The high-speed fan with hybrid support of air bearing and magnetic bearing according to claim 1, wherein the radial air bearing (5) comprises a front end radial air bearing (12) and a rear end radial air bearing (13); the front end radial air suspension bearing (12) and the rear end radial air suspension bearing (13) are respectively positioned on two sides of the high-speed motor stator (3).
5. The high-speed fan with hybrid support of air-bearing and magnetic-bearing according to claim 1, wherein the axial magnetic bearing (6) comprises a front axial magnetic bearing (14) and a rear axial magnetic bearing (15); a rotor axial thrust disc (11) is arranged in the circumferential direction of the high-speed motor rotor (4) in a surrounding mode, and the rotor axial thrust disc (11) is located in a gap between the front-end axial magnetic bearing (14) and the rear-end axial magnetic bearing (15).
6. The high-speed fan with hybrid support of air-bearing and magnetic-bearing according to claim 5, wherein the front-end axial magnetic bearing (14) and the rear-end axial magnetic bearing (15) are respectively provided with a front-end magnetic bearing coil (16) and a rear-end magnetic bearing coil (17) and are electrically connected with the axial magnetic bearing controller (8), and the rotor axial thrust disc (11) is located between the front-end magnetic bearing coil (16) and the rear-end magnetic bearing coil (17); the rotor axial thrust disc (11) is made of magnetic materials.
7. The air-floating bearing and magnetic-floating bearing hybrid supported high-speed fan according to claim 5, wherein the rotor axial thrust disc (11) is fixedly connected to the high-speed motor rotor (4).
8. The air-floating bearing and magnetic-floating bearing hybrid supported high-speed fan according to claim 1, wherein a partition plate (18) is further arranged in the main shell (9); the partition plate (18) is connected to the side of the main casing (9) close to the impeller (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011178968.5A CN112467932A (en) | 2020-10-29 | 2020-10-29 | High-speed fan with hybrid support of air bearing and magnetic bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011178968.5A CN112467932A (en) | 2020-10-29 | 2020-10-29 | High-speed fan with hybrid support of air bearing and magnetic bearing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112467932A true CN112467932A (en) | 2021-03-09 |
Family
ID=74834186
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011178968.5A Withdrawn CN112467932A (en) | 2020-10-29 | 2020-10-29 | High-speed fan with hybrid support of air bearing and magnetic bearing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112467932A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113328559A (en) * | 2021-07-15 | 2021-08-31 | 苏州苏磁智能科技有限公司 | Magnetic suspension motor, magnetic suspension compressor and turbine motor with high effective magnetic force area |
| CN113513490A (en) * | 2021-07-02 | 2021-10-19 | 鑫磊压缩机股份有限公司 | Direct-connected high-rotation-speed air compressor |
| CN114321177A (en) * | 2022-01-20 | 2022-04-12 | 中车株洲电机有限公司 | Suspension bearing |
| CN114542187A (en) * | 2022-03-08 | 2022-05-27 | 重庆江增船舶重工有限公司 | Axial-flow outer rotor type magnetic suspension ORC organic working medium expansion generator |
| CN114962323A (en) * | 2022-06-10 | 2022-08-30 | 合肥通用机械研究院有限公司 | Low-vibration low-noise centrifugal fan adopting gas bearing |
| WO2022222562A1 (en) * | 2021-04-19 | 2022-10-27 | 青岛海尔生物医疗科技有限公司 | Centrifuge |
| CN116104771A (en) * | 2023-04-10 | 2023-05-12 | 山东天瑞重工有限公司 | Magnetic suspension fluid conveying device |
-
2020
- 2020-10-29 CN CN202011178968.5A patent/CN112467932A/en not_active Withdrawn
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022222562A1 (en) * | 2021-04-19 | 2022-10-27 | 青岛海尔生物医疗科技有限公司 | Centrifuge |
| CN113513490A (en) * | 2021-07-02 | 2021-10-19 | 鑫磊压缩机股份有限公司 | Direct-connected high-rotation-speed air compressor |
| CN113328559A (en) * | 2021-07-15 | 2021-08-31 | 苏州苏磁智能科技有限公司 | Magnetic suspension motor, magnetic suspension compressor and turbine motor with high effective magnetic force area |
| CN114321177A (en) * | 2022-01-20 | 2022-04-12 | 中车株洲电机有限公司 | Suspension bearing |
| CN114542187A (en) * | 2022-03-08 | 2022-05-27 | 重庆江增船舶重工有限公司 | Axial-flow outer rotor type magnetic suspension ORC organic working medium expansion generator |
| CN114542187B (en) * | 2022-03-08 | 2024-03-08 | 重庆江增船舶重工有限公司 | Axial-flow outer rotor type magnetic levitation ORC organic working medium expansion generator |
| CN114962323A (en) * | 2022-06-10 | 2022-08-30 | 合肥通用机械研究院有限公司 | Low-vibration low-noise centrifugal fan adopting gas bearing |
| CN116104771A (en) * | 2023-04-10 | 2023-05-12 | 山东天瑞重工有限公司 | Magnetic suspension fluid conveying device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112467932A (en) | High-speed fan with hybrid support of air bearing and magnetic bearing | |
| CN202273889U (en) | Magnetic levitation flywheel centrifugal blower | |
| CN2773358Y (en) | High-speed magnetic-suspension centrifugal blower | |
| CN112879317B (en) | High-speed high-pressure magnetic suspension centrifugal two-stage air compressor and control method thereof | |
| CN105477706A (en) | Double-stator hybrid supporting artificial heart pump | |
| CN212479344U (en) | Efficient backrest type double-turbine centripetal turbine expansion power generation device | |
| CN110247504A (en) | One kind being used for the air compressor motor general assembly of hydrogen fuel cell dual-cooling type ultracentrifugation | |
| CN104061175A (en) | Air bearing compressor for fuel cell | |
| CN102425553A (en) | Measuring method for rotor suspension center of magnetic suspension molecular pump | |
| CN113819077A (en) | Magnetic suspension air blower with single-stage double-suction and double stator and rotor | |
| CN113217426A (en) | Impeller is from inhaling refrigerated magnetic suspension fan | |
| CN107516990B (en) | Dust collector motor and dust collector | |
| CN106640693A (en) | Vertical type direct connection draught fan | |
| CN215672780U (en) | Impeller is from inhaling refrigerated magnetic suspension fan | |
| CN215860885U (en) | Magnetic suspension air blower with single-stage double-suction and double stator and rotor | |
| CN214465074U (en) | Motor directly links centrifugal blower | |
| CN116123116A (en) | Natural magnetic suspension high-speed axial flow fan | |
| KR101852263B1 (en) | Fluid machinery having multifunctional bearingless axial impeller using magnetic levitation | |
| CN215860876U (en) | Magnetic suspension axial flow fan with impeller as thrust disc | |
| CN102570926A (en) | Five-degree-of-freedom suspended electric power generation system | |
| CN104481898A (en) | Outer-rotor axial flow fan adopting electromagnet bearing | |
| CN113847272A (en) | Novel magnetic suspension air-blower | |
| CN217976663U (en) | Centrifugal blower capable of effectively reducing axial bearing load | |
| CN219197557U (en) | Horizontal-axis magnetic suspension wind driven generator | |
| CN219041555U (en) | Vertical suspension shaft structure, motor, generator host and generator set and system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20210309 |