CN112290745A - System for monitoring contact state of rotor shaft and permanent magnet of high-speed permanent magnet motor - Google Patents
System for monitoring contact state of rotor shaft and permanent magnet of high-speed permanent magnet motor Download PDFInfo
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- CN112290745A CN112290745A CN202011263990.XA CN202011263990A CN112290745A CN 112290745 A CN112290745 A CN 112290745A CN 202011263990 A CN202011263990 A CN 202011263990A CN 112290745 A CN112290745 A CN 112290745A
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- permanent magnet
- rotor shaft
- pressure sensor
- sensor
- monitoring
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- 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
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Abstract
The invention discloses a system for monitoring the contact state of a rotor shaft and a permanent magnet of a high-speed permanent magnet motor, which comprises the rotor shaft, the permanent magnet, a pressure sensor, a sensor lead, a rotary slip ring and a data acquisition part, wherein the permanent magnet is sleeved on the rotor shaft, the pressure sensor is arranged in the peripheral wall of the rotor shaft, the pressure sensor is connected with one end of the sensor lead, the other end of the sensor lead is connected with the rotary slip ring, the rotary slip ring is sleeved on the rotor shaft, and the rotary slip ring is connected with the data acquisition part. The utility model discloses a monitoring system, pressure sensor connects the sensor wire, rotatory sliding ring is connected to the data acquisition part, the normal operating in-process of the high-speed permanent-magnet machine of surface mounting formula, the data acquisition part gathers the pressure value of pressure sensor and is zero, explains that the permanent magnet does not have pressure to pressure sensor and permanent magnet breaks away from with pressure sensor promptly, and the data acquisition part gathers the pressure value of pressure sensor and is nonzero, then permanent magnet and rotor shaft are normal operating.
Description
Technical Field
The invention relates to the technical field of high-speed motors, in particular to a system for monitoring the contact state of a rotor shaft and a permanent magnet of a high-speed permanent magnet motor.
Background
The surface-mounted high-speed permanent magnet motor becomes an important development direction of the high-speed motor due to the advantages of high power density, small volume, high efficiency and the like, and becomes a research hotspot in the field of high-speed motors at home and abroad.
The high-speed permanent-magnet machine's of table formula rotor shaft, the high-speed permanent-magnet machine's of permanent magnet laminating assembly back are protected through rotor core sheath, have the dense high advantage of air gap magnetism, however the high-speed permanent-magnet machine rotor of table formula under high-speed rotatory load effect, the permanent magnet will bear great centrifugal force, lead to the high-speed permanent-magnet machine rotor shaft of table formula to break away from with the permanent magnet easily, aggravate the rotor unbalance, arouse the stator and sweep the hall with the rotor, lead to the rotor to be destroyed.
Therefore, the technical problem to be solved by those skilled in the art is how to avoid the situation that the rotor shaft is separated from the permanent magnet in the operation process of the surface-mounted high-speed permanent magnet motor.
Disclosure of Invention
The invention aims to provide a system for monitoring the contact state of a rotor shaft and a permanent magnet of a high-speed permanent magnet motor, which monitors the radial position of the permanent magnet of the surface-mounted high-speed permanent magnet motor by detecting the radial pressure of the permanent magnet of the surface-mounted high-speed permanent magnet motor so as to monitor whether the rotor shaft is separated from the permanent magnet in the running process of the surface-mounted high-speed permanent magnet motor.
In order to solve the technical problem, the invention provides a system for monitoring the contact state of a rotor shaft and a permanent magnet of a high-speed permanent magnet motor, which comprises the rotor shaft, the permanent magnet, a pressure sensor, a sensor lead, a rotary slip ring and a data acquisition part, wherein the permanent magnet is sleeved on the rotor shaft, the pressure sensor is arranged in the peripheral wall of the rotor shaft, the pressure sensor is connected with one end of the sensor lead, the other end of the sensor lead is connected with the rotary slip ring, the rotary slip ring is sleeved on the rotor shaft, and the rotary slip ring is connected with the data acquisition part.
Preferably, the rotor shaft is provided with a mounting hole for mounting the pressure sensor.
Preferably, the pressure sensor is in radial clearance fit with the mounting hole, and the maximum clearance between the pressure sensor and the mounting hole is less than 0.1 mm.
Preferably, a spring abutting against the bottom of the pressure sensor is arranged in the mounting hole.
Preferably, a collar for fixing the top of the sensor wire is further arranged in the mounting hole.
Preferably, the spring is a belleville spring.
Preferably, a wire casing for installing the sensor wire is further arranged in the rotor shaft and along the axial direction of the rotor shaft, and the installation hole is communicated with the wire casing.
Preferably, the number of the pressure sensors is at least 2, and the pressure sensors are arranged axially along the rotor shaft.
Preferably, a top detection end surface of the pressure sensor coincides with the rotor shaft surface.
Preferably, a rotor core sheath is arranged on the periphery of the permanent magnet.
The invention provides a system for monitoring the contact state of a rotor shaft and a permanent magnet of a high-speed permanent magnet motor, which comprises the rotor shaft, the permanent magnet, a pressure sensor, a sensor lead, a rotary slip ring and a data acquisition part, wherein the permanent magnet is sleeved on the rotor shaft, the pressure sensor is arranged in the peripheral wall of the rotor shaft, the pressure sensor is connected with one end of the sensor lead, the other end of the sensor lead is connected with the rotary slip ring, the rotary slip ring is sleeved on the rotor shaft, and the rotary slip ring is connected with the data acquisition part. The application discloses a monitoring system, connect pressure sensor to one end of the sensor wire, and connect the other end of the sensor wire to the rotary slip ring, connect the data acquisition component with the rotary slip ring, install the pressure sensor in the peripheral wall of the rotor shaft, suit the permanent magnet on the rotor shaft, simultaneously ensure that the pressure sensor can contact the permanent magnet, and ensure that the data transmitted from the pressure sensor to the data acquisition component through the sensor wire is not zero, namely ensure that the permanent magnet has pressure on the pressure sensor, through monitoring the normal operation process of the surface-mounted high-speed permanent magnet motor, whether the pressure value of the pressure sensor acquired by the data acquisition component is zero, judge whether the surface-mounted high-speed permanent magnet motor rotor shaft contacts with the permanent magnet, if the pressure value of the pressure sensor acquired by the data acquisition component is zero, it is stated that the permanent magnet does not have pressure on the pressure sensor, namely the permanent magnet, at this moment, the surface-mounted high-speed permanent magnet motor is required to stop running, the permanent magnet and the rotor shaft are prevented from sweeping, if the pressure value of the pressure sensor acquired by the data acquisition part is not zero, the permanent magnet and the pressure sensor are in normal contact, and the permanent magnet and the rotor shaft can be judged to be in normal running.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic overall structure diagram of an embodiment of the present invention;
FIG. 2 is a cross-sectional view of the structure shown in FIG. 1;
FIG. 3 is a cross-sectional view of the rotor shaft shown in FIG. 1;
fig. 4 is a cross-sectional view of the structure shown in fig. 1.
Wherein, in fig. 1-4:
the rotor comprises a rotor shaft-1, a mounting hole-101, a wire groove-102, a permanent magnet-2, a pressure sensor-3, a sensor wire-4, a rotary slip ring-5, a data acquisition component-6, a spring-7, a clamping ring-8 and a rotor iron core sheath-9.
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. 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.
Referring to fig. 1 to 4, fig. 1 is a schematic overall structure diagram of an embodiment of the present invention; FIG. 2 is a cross-sectional view of the structure shown in FIG. 1; FIG. 3 is a cross-sectional view of the rotor shaft shown in FIG. 1; fig. 4 is a cross-sectional view of the structure shown in fig. 1.
In a specific embodiment provided by the invention, the rotor mainly comprises a rotor shaft 1, a permanent magnet 2, a pressure sensor 3, a sensor lead 4, a rotary slip ring 5 and a data acquisition part 6, wherein the permanent magnet 2 is sleeved on the rotor shaft 1, the pressure sensor 3 is arranged in the peripheral wall of the rotor shaft 1, the pressure sensor 3 is connected with one end of the sensor lead 4, the other end of the sensor lead 4 is connected with the rotary slip ring 5, the rotary slip ring 5 is sleeved on the rotor shaft 1, and the rotary slip ring 5 is connected with the data acquisition part 6.
Wherein, 2 suit of permanent magnet are on rotor shaft 1, pressure sensor 3 installs in 1 periphery wall of rotor shaft, pressure sensor 3 is used for detecting 2 radial pressure of permanent magnet, pressure sensor 3 is connected with the one end of sensor wire 4, the other end and the rotatory sliding ring 5 of sensor wire 4 are connected, sensor wire 4 is used for transmitting the radial pressure value of the permanent magnet 2 that pressure sensor 3 detected to rotatory sliding ring 5, rotatory sliding ring 5 suit is on rotor shaft 1, and rotatory sliding ring 5 is connected with data acquisition part 6, data acquisition part 6 is used for gathering the radial pressure of 2 permanent magnet of rotatory sliding ring 5.
Specifically, in the practical application process, the pressure sensor 3 is connected to one end of the sensor wire 4, the other end of the sensor wire 4 is connected to the rotating slip ring 5, the data acquisition component 6 is connected with the rotating slip ring 5, the pressure sensor 3 is installed in the peripheral wall of the rotor shaft 1, the permanent magnet 2 is sleeved on the rotor shaft 1, meanwhile, the pressure sensor 3 can be ensured to be in contact with the permanent magnet 2, and the data transmitted to the data acquisition component 6 by the pressure sensor 3 through the sensor wire 4 is not zero, namely, the permanent magnet 2 is ensured to have pressure on the pressure sensor 3, by monitoring the normal operation process of the surface-mounted high-speed permanent magnet motor, whether the pressure value of the pressure sensor 3 acquired by the data acquisition component 6 is zero or not, whether the rotor shaft 1 of the surface-mounted high-speed permanent magnet motor is in contact with the permanent magnet 2 or not is judged, if the pressure value of the pressure sensor, it shows that permanent magnet 2 does not have pressure to pressure sensor 3 promptly permanent magnet 2 breaks away from with pressure sensor 3, and the high-speed permanent-magnet machine of surface-mounted formula stop operation needs this moment, avoids appearing permanent magnet 2 and rotor shaft 1 and takes place to sweep the hall, if the pressure value of pressure sensor 3 that data acquisition part 6 gathered is nonzero, explains that permanent magnet 2 and pressure sensor 3 are in normal contact, then can conclude that permanent magnet 2 and rotor shaft 1 are normal operating.
The following describes the fixation of the pressure sensor 3 in detail, the rotor shaft 1 is provided with a mounting hole 101 for mounting the pressure sensor 3, the pressure sensor 3 is in radial clearance fit with the mounting hole 101, the maximum clearance between the pressure sensor 3 and the mounting hole 101 is less than 0.1mm, and the mounting hole 101 is internally provided with a spring 7 abutting against the bottom of the pressure sensor 3. A mounting hole 101 for placing a pressure sensor 3 is reserved in a surface-mounted high-speed permanent magnet motor rotor shaft 1, the depth of the mounting hole 101 is consistent with the height of a clamping ring 8, the pressure sensor 3 and a spring 7 after assembly, the top detection end face of the pressure sensor 3 needs to be ensured to be coincident with the surface of the rotor shaft 1, the mounting hole 101 is in radial clearance fit with the pressure sensor 3, the maximum clearance is 0.1mm, and the spring 7 is a belleville spring.
Further, an axial mounting hole 101 is reserved in the surface-mounted high-speed permanent magnet motor rotor shaft 1, so that a pressure sensor wire 4 can be conveniently led out, a wire groove 102 used for mounting the sensor wire 4 is further formed in the rotor shaft 1 in the axial direction, the mounting hole 101 is communicated with the wire groove 102, the sensor wire 4 extends to a rotating part of the rotating slip ring 5 through the wire groove 102, a static part of the rotating slip ring 5 is mounted on the outer side of the rotating part of the rotating slip ring 5, the static part of the rotating slip ring 5 is connected with a data acquisition part 6, and the data acquisition part 6 acquires a pressure value of the static part transmitted to the rotating slip ring 5.
It should be noted that the pressure sensor 3 is placed in a mounting hole 101 reserved in the rotor shaft 1 of the high-speed permanent magnet motor by lathe machining, the bottom of the pressure sensor is connected with the bottom surface of the mounting hole 101 through a spring 7, and meanwhile, a retainer ring 8 is arranged for limiting the pressure sensor 3 to avoid outward radial displacement of the pressure sensor 3 during high-speed rotation,
further, the number of the pressure sensors 3 is at least 2, and the pressure sensors 3 are arranged axially along the rotor shaft 1. 2 individual pressure sensor 3 sets up along 1 axial of rotor shaft, can monitor 2 different positions of permanent magnet, has improved the accuracy of monitoring pressure, avoids appearing pressure sensor 3 and damages and lead to the condition that can not normally transmit pressure, guarantees real-time supervision's the degree of accuracy.
Finally, a rotor core sheath 9 is provided around the permanent magnet 2. The rotor is protected by a rotor core sheath 9, the metal sheath adopts a hot-sleeve process, and the composite material sheath adopts a winding process or a cold-pressing process.
In summary, the high-speed permanent magnet motor rotor shaft and permanent magnet contact state monitoring system that this embodiment provided mainly includes rotor shaft, permanent magnet, pressure sensor, sensor wire, rotatory sliding ring and data acquisition part, and the permanent magnet suit is on the rotor shaft, and pressure sensor installs in the rotor shaft periphery wall, and pressure sensor is connected with the one end of sensor wire, and the other end and the rotatory sliding ring of sensor wire are connected, and rotatory sliding ring suit is on the rotor shaft, and rotatory sliding ring is connected with data acquisition part. The application discloses a monitoring system, connect pressure sensor to one end of the sensor wire, and connect the other end of the sensor wire to the rotary slip ring, connect the data acquisition component with the rotary slip ring, install the pressure sensor in the peripheral wall of the rotor shaft, suit the permanent magnet on the rotor shaft, simultaneously ensure that the pressure sensor can contact the permanent magnet, and ensure that the data transmitted from the pressure sensor to the data acquisition component through the sensor wire is not zero, namely ensure that the permanent magnet has pressure on the pressure sensor, through monitoring the normal operation process of the surface-mounted high-speed permanent magnet motor, whether the pressure value of the pressure sensor acquired by the data acquisition component is zero, judge whether the surface-mounted high-speed permanent magnet motor rotor shaft contacts with the permanent magnet, if the pressure value of the pressure sensor acquired by the data acquisition component is zero, it is stated that the permanent magnet does not have pressure on the pressure sensor, namely the permanent magnet, at this moment, the surface-mounted high-speed permanent magnet motor is required to stop running, the permanent magnet and the rotor shaft are prevented from sweeping, if the pressure value of the pressure sensor acquired by the data acquisition part is not zero, the permanent magnet and the pressure sensor are in normal contact, and the permanent magnet and the rotor shaft can be judged to be in normal running.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. The monitoring system for the contact state of the rotor shaft and the permanent magnet of the high-speed permanent magnet motor is characterized by comprising a rotor shaft (1), a permanent magnet (2), a pressure sensor (3), a sensor wire (4), a rotary sliding ring (5) and a data acquisition part (6), wherein the permanent magnet (2) is sleeved on the rotor shaft (1), the pressure sensor (3) is installed in the peripheral wall of the rotor shaft (1), the pressure sensor (3) is connected with one end of the sensor wire (4), the other end of the sensor wire (4) is connected with the rotary sliding ring (5), the rotary sliding ring (5) is sleeved on the rotor shaft (1), and the rotary sliding ring (5) is connected with the data acquisition part (6).
2. The system for monitoring the contact state of the rotor shaft and the permanent magnet of the high-speed permanent magnet motor according to claim 1, characterized in that a mounting hole (101) for mounting the pressure sensor (3) is formed in the rotor shaft (1).
3. The system for monitoring the contact state of the rotor shaft and the permanent magnet of the high-speed permanent magnet motor according to claim 2, wherein the pressure sensor (3) is in radial clearance fit with the mounting hole (101), and the maximum clearance between the pressure sensor (3) and the mounting hole (101) is less than 0.1 mm.
4. The system for monitoring the contact state of the rotor shaft and the permanent magnet of the high-speed permanent magnet motor according to claim 3, wherein a spring (7) abutting against the bottom of the pressure sensor (3) is arranged in the mounting hole (101).
5. The system for monitoring the contact state of the rotor shaft and the permanent magnet of the high-speed permanent magnet motor according to claim 4, characterized in that a clamping ring (8) used for fixing the top of the sensor lead (4) is further arranged in the mounting hole (101).
6. The system for monitoring the contact state of the rotor shaft and the permanent magnet of the high-speed permanent magnet motor according to claim 5, wherein the spring (7) is a belleville spring.
7. The system for monitoring the contact state of the rotor shaft and the permanent magnet of the high-speed permanent magnet motor according to claim 2, wherein a wire slot (102) for installing the sensor wire (4) is further formed in the rotor shaft (1) in the axial direction of the rotor shaft, and the installation hole (101) is communicated with the wire slot (102).
8. The system for monitoring the contact state of the rotor shaft and the permanent magnet of the high-speed permanent magnet motor according to any one of claims 2 to 7, characterized in that the number of the pressure sensors (3) is at least 2, and the pressure sensors (3) are arranged along the axial direction of the rotor shaft (1).
9. The system for monitoring the contact state of the rotor shaft and the permanent magnet of the high-speed permanent magnet motor according to claim 8, wherein the top detection end surface of the pressure sensor (3) is coincident with the surface of the rotor shaft (1).
10. The system for monitoring the contact state of the rotor shaft of the high-speed permanent magnet motor and the permanent magnet according to claim 8, characterized in that a rotor core sheath (9) is arranged on the periphery of the permanent magnet (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011263990.XA CN112290745A (en) | 2020-11-12 | 2020-11-12 | System for monitoring contact state of rotor shaft and permanent magnet of high-speed permanent magnet motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011263990.XA CN112290745A (en) | 2020-11-12 | 2020-11-12 | System for monitoring contact state of rotor shaft and permanent magnet of high-speed permanent magnet motor |
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| Publication Number | Publication Date |
|---|---|
| CN112290745A true CN112290745A (en) | 2021-01-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011263990.XA Pending CN112290745A (en) | 2020-11-12 | 2020-11-12 | System for monitoring contact state of rotor shaft and permanent magnet of high-speed permanent magnet motor |
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|---|---|
| CN (1) | CN112290745A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114112156A (en) * | 2022-01-21 | 2022-03-01 | 上海北阅机械设备有限公司 | Constant velocity universal joint axial derivative force measuring device and testing machine |
-
2020
- 2020-11-12 CN CN202011263990.XA patent/CN112290745A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114112156A (en) * | 2022-01-21 | 2022-03-01 | 上海北阅机械设备有限公司 | Constant velocity universal joint axial derivative force measuring device and testing machine |
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