CN113155312A - Device and method for measuring temperature of motor rotor - Google Patents
Device and method for measuring temperature of motor rotor Download PDFInfo
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- CN113155312A CN113155312A CN202110090079.1A CN202110090079A CN113155312A CN 113155312 A CN113155312 A CN 113155312A CN 202110090079 A CN202110090079 A CN 202110090079A CN 113155312 A CN113155312 A CN 113155312A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K13/00—Thermometers specially adapted for specific purposes
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/02—Means for indicating or recording specially adapted for thermometers
- G01K1/024—Means for indicating or recording specially adapted for thermometers for remote indication
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/14—Supports; Fastening devices; Arrangements for mounting thermometers in particular locations
- G01K1/143—Supports; Fastening devices; Arrangements for mounting thermometers in particular locations for measuring surface temperatures
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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
- H02K11/25—Devices for sensing temperature, or actuated thereby
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- Microelectronics & Electronic Packaging (AREA)
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Abstract
The invention discloses a device for measuring the temperature of a motor rotor, which comprises a machine base, a rotor, a synchronizing device and a measuring device, wherein the rotor is arranged in the machine base, the measuring device comprises a sensor and a computer, the sensor is fixedly arranged on the rotor, and the computer is electrically connected with the sensor through the synchronizing device. The invention realizes the measurement of the rotary mechanical contact sensor through the synchronizer, avoids the interference of an electromagnetic field under wireless transmission, and finally obtains the temperature through the processing of a computer according to the electric signals acquired by the sensor.
Description
Technical Field
The invention belongs to the technical field of experimental equipment, and particularly relates to a device and a method for measuring the temperature of a motor rotor.
Background
Excessive temperatures severely threaten insulation life and operating efficiency of the motor, and also cause thermal strain of key components of the motor. Along with the increase of the temperature of the motor, the dielectric property of the insulating material is reduced, and meanwhile, thermal deformation and thermal abrasion are generated under the action of thermal stress, so that the insulating material is damaged, and finally, serious electrical faults are caused. The over-high temperature can also cause the resistance of the winding to be increased, the magnetic energy of the stator and the rotor is influenced, the impedance of the whole motor system is increased, and the running efficiency of the motor is reduced. The motor rotor also undergoes thermal deformation, such as increased rotor deflection, as the temperature increases. And the deformation of the rotor causes mechanical faults such as vibration and the like, and the service life of the generator is damaged. Therefore, temperature measurement of critical components such as the generator rotor is very necessary.
Currently, sensors can be divided into two categories: contact and contactless. The motor is a complex electromagnetic system, and a strong alternating electromagnetic field is arranged around the motor. If the non-contact sensor is used for measuring the temperature of the rotor, the data transmission of the sensor is wireless transmission. The electromagnetic field can cause serious interference to the transmitted signal, resulting in measurement invalidity. When the rotor rotates in the running state of the motor and the traditional measuring method is used for measuring by using the contact sensor, the lead, the collecting device and the like are fixed devices, and effective measurement cannot be realized.
Therefore, how to provide a device and a method for measuring the temperature of the rotor of the motor to achieve the temperature measurement of the contact sensor and obtain the temperature of the rotor is a problem to be solved in the field.
Disclosure of Invention
In view of this, the present invention provides a device and a method for measuring a temperature of a rotor of a motor, which implement temperature measurement of a contact sensor.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a measure device of electric motor rotor temperature, includes frame, rotor, synchronizer and measuring device, the rotor sets up inside the frame, measuring device includes sensor and computer, the sensor is fixed on the rotor, the computer passes through synchronizer and is connected with the sensor electricity.
Preferably, synchronizer includes, two-sided sliding ring, double-arc carbon brush and triangle mount, two-sided sliding ring bottom is provided with the copper ring, the output of rotor is the pivot, two-sided sliding ring cup joints in the pivot, two-sided sliding ring is provided with the wire guide, triangle mount one end and two-arc carbon brush fixed connection, the other end and frame fixed connection.
Preferably, the middle part of the double-arc carbon brush is made of a non-conductive material, one end of the triangular fixing frame is fixedly connected with the middle part of the double-arc carbon brush, the other end of the triangular fixing frame is fixedly connected with the inner wall of the machine base, one end, close to the double-arc carbon brush, of the cross section of the triangular fixing frame is circular, and one end, close to the inner wall of the machine base, of the cross section of the triangular fixing frame is rectangular.
Preferably, the double-sided slip ring type linear sensor further comprises a linear rail, the sensor is connected with the double-sided slip ring through the linear rail, the linear rail is a Y-shaped linear rail and comprises a trunk line rail and a branch line rail, the trunk line rail is arranged at the sensor end, the branch line rail is arranged at the double-sided slip ring end, and the branch line rail is respectively connected with an inner ring and an outer ring of the double-sided slip ring.
Preferably, the measuring device further comprises an acquisition card, a wiring port is formed in the end, far away from the rotor, of the double-arc-shaped carbon brush, the double-arc-shaped carbon brush is connected with the acquisition card through the wiring port, and the acquisition card converts an analog quantity signal into a digital quantity signal and transmits the digital quantity signal to the computer.
Preferably, the sensor is provided with a cylindrical outlet, and the cylindrical outlet is connected with the trunk rail end in an embedded mode.
Preferably, the double-arc carbon brush is in interference fit with the tripod, and the surface of the double-arc carbon brush is made of copper material.
Preferably, the branch line rails are fixed through two magnetic suction seats and a double-sided slip ring, and the trunk line rails and the branch line rails also stretch and twist according to the size and the shape of the motor.
Preferably, both ends of a rotating shaft of the rotor are connected with bearings, the bearings are fixed on the cushion blocks through bearing seats, and the cushion blocks and the bottom of the machine base are fixed on a floor through fixing screws.
Preferably, the sensor is a temperature sensor.
A measuring method for measuring the temperature of a motor rotor comprises the following steps:
s1: the double-sided slip ring is fixedly sleeved on the motor rotor, the double-sided slip ring is internally provided with the double-arc-shaped carbon brush, and the double-arc-shaped carbon brush is in good contact and uniform stress when rotating relative to the double-sided slip ring, so that a circuit is continuously conducted when the motor is in a power-on state;
s2: fixing the measuring device on the rotor, and electrically connecting the measuring device with the double-sided slip ring through a synchronizing device;
s3: and operating the motor, transmitting an electric signal generated along with the temperature change to a computer by the sensor, and obtaining the temperature of the rotor according to the electric signal and the sensitivity of the sensor.
The invention has the beneficial effects that: the invention realizes the measurement of the rotary mechanical contact sensor through the synchronizer, and avoids the interference of an electromagnetic field in wireless transmission; the invention prevents the lead from being damaged by centrifugal force generated by rotation through the Y-shaped linear rail, greatly improves the safety and stability of the device, and finally acquires data through the acquisition card and obtains the rotor temperature data through computer processing.
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 view of the overall structure of the present invention;
FIG. 2 is a schematic view of a bearing and its mounting structure;
FIG. 3 is a side view of a bearing and its mounting structure;
FIG. 4 is a schematic view of a double arc carbon brush configuration;
FIG. 5 is a schematic view of a triangular fixing frame;
FIG. 6 is a schematic view of a double-sided slip ring configuration;
FIG. 7 is a schematic view of the bottom structure of the double-sided slip ring;
FIG. 8 is a schematic view of a wire track configuration;
FIG. 9 is a schematic diagram of a sensor configuration;
FIG. 10 is a bottom view of the tripod attached to the double-sided slip ring;
FIG. 11 is a top view of the tripod in connection with the double-sided slip ring;
FIG. 12 is a schematic view of a double-sided slip ring connected to a double-arc carbon brush;
fig. 13 is a sectional view of a portion a-a where the double-sided slip ring and the double arc-shaped carbon brush are connected.
The device comprises a rotating shaft 1, a bearing 2, a bearing seat 3, a bearing seat 4, a double-arc carbon brush 41, a wiring port 5, a triangular fixing frame 6, a cushion block 7, a double-sided slip ring 71, a wire guide hole 8, a wire rail 9, a rotor 10, a sensor 11, a machine base 12, a fixing screw 13, a computer 14 and an acquisition card 14.
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. 1-13, a device for measuring the temperature of a rotor of an electric motor comprises a base 11, a rotor 9, a synchronizing device and a measuring device, wherein the measuring device comprises a sensor 10 and a computer 13, the sensor 10 is fixed on the rotor 9 and rotates synchronously with the rotor 9, and the computer 13 is electrically connected with the sensor 10 through the synchronizing device.
In another embodiment, the synchronizer comprises a double-sided slip ring 7, a double-arc carbon brush 4 and a triangular fixing frame 5, wherein the double-arc carbon brush 4 is arranged inside a ring groove of the double-sided slip ring 7, namely between an inner ring wall and an outer ring wall, the bottom of the double-sided slip ring 7 is provided with a copper ring for wiring, the output end of the rotor 9 is the rotating shaft 1, the double-sided slip ring 7 is fixed on the rotating shaft 1 in an interference fit manner, the double-sided slip ring 7 is provided with a wire hole 71, and a wire is connected with the copper ring at the bottom through the wire hole 71; one end of the triangular fixing frame 5 is fixedly connected with the double-arc-shaped carbon brush 4, the other end of the triangular fixing frame is fixedly connected with the machine base 11, and the triangular fixing frame 5 is used for fixing the double-arc-shaped carbon brush 4.
The inner surface of the sliding groove of the double-sided slip ring 7 is made of a copper material, a wire guide hole is formed in the bottom of the slip groove close to the rotor 9 side, and the double-sided slip ring 7 and the rotating shaft 1 do not slide relatively and rotate synchronously. The double-arc carbon brush 4 is arranged in the sliding chute, the upper and lower arc surfaces of the double-arc carbon brush 4 are attached to the two inner surfaces of the sliding chute and can slide under the action of small friction force, the middle part of the double-arc carbon brush 4 is made of non-conductive materials, and a wire guide hole 71 is formed in the side, away from the rotor 9, of the double-arc carbon brush.
In another embodiment, the middle part of the double arc-shaped carbon brush 4 is made of non-conductive material, one end of the triangular fixing frame 5 is fixedly connected with the middle part of the double arc-shaped carbon brush 4, and the other end is fixedly connected with the inner wall of the machine base 11; the cross section of the triangular fixing frame 5 is round at one end close to the double-arc-shaped carbon brush 4, and is rectangular at one end close to the inner wall of the machine base 11.
Wherein, triangle mount 5 includes two bar supports and a linking bridge, the cross sectional shape of bar support changes according to its position, be circular cross section near 4 one ends of double arc carbon brushes, be rectangular cross section near 11 inner walls of frame one end, the rectangular cross section end of bar support is equipped with the screw, and fix on frame 11 through the bolt, the circular cross section end of two bar supports is connected, and fix the mid portion at double arc carbon brushes 4, the mid portion of two bar supports passes through the linking bridge and connects, the linking bridge is used for supporting two bar supports, form the triangular structure.
In another embodiment, the sensor 10 is adhered to the surface of the rotor 9 by an adhesive, one end of the linear rail 8 is fixedly connected with the sensor 10, the other end of the linear rail 8 is fixedly connected with the double-sided slip ring 7, the linear rail 8 is a Y-shaped linear rail and comprises a main linear rail and a branch linear rail, the main linear rail is connected with the end of the sensor 10, and the branch linear rails are respectively connected with the inner ring and the outer ring of the double-sided slip ring 7; the wire track 8 prevents the wire from being damaged by centrifugal force generated by rotation, so that the effectiveness of the device is ensured.
In another embodiment, a wiring port 41 is arranged at one end of the double-arc carbon brush 4 away from the rotor 9, the double-arc carbon brush 4 is connected with the acquisition card 14 through the wiring port 41, and the acquisition card 14 converts the analog quantity signal into a digital quantity signal and transmits the digital quantity signal to the computer 13.
In another embodiment, the sensor 10 is provided with a cylindrical outlet 101, the cylindrical outlet 101 being in embedded connection with the mains rail end.
In another embodiment, the fit between the double arc-shaped carbon brush 4 and the tripod fixing frame 5 is an interference fit, and the surface of the double arc-shaped carbon brush 4 is made of copper material.
In another embodiment, the two ends of the rotating shaft 1 are connected with the bearings 2, the bearings 2 are fixed on the cushion blocks 6 through the bearing seats 4, and the cushion blocks 6 and the bottom of the machine base 11 are fixed on the floor through the fixing screws 12.
In another embodiment, the branch line rails are fixed by two magnetic suction seats and a double-sided slip ring 7, and the line rails 8 also stretch and twist according to the size and the shape of the motor.
In another embodiment, the electric machine comprises a generator or a motor.
A measuring method for measuring the temperature of a motor rotor comprises the following steps:
s1: a double-sided slip ring 7 is fixedly sleeved on a rotor 9 of the motor, a double-arc-shaped carbon brush 4 is arranged in the double-sided slip ring 7, and when the double-arc-shaped carbon brush 4 and the double-sided slip ring 7 rotate relatively, the contact is good and the stress is uniform, so that the electric signal is continuously conducted when the motor is electrified;
s2: fixing a measuring device on a rotor 9, and electrically connecting the measuring device with a double-sided slip ring 7 through a synchronizing device;
s3: when the motor is operated, the sensor 10 transmits an electric signal generated along with the temperature change to the computer 13, and the rotor temperature can be obtained according to the electric signal and the sensitivity of the sensor 10.
In another embodiment, the rotor temperature is obtained as a function of time by successive sampling.
The working principle of the invention is as follows:
for the generator, after the motor runs, an external steam turbine drags a generator rotor 9 to rotate; for the motor, when the motor is operated, three-phase alternating current is introduced into the stator winding, a rotating variable magnetic field is generated around the rotor 9, and the rotor 9 is subjected to force in the variable magnetic field to rotate. The sensor 10, the wire track 8, the conducting wire and the double-sided slip ring 7 rotate synchronously along with the rotor 9, the double-arc-shaped carbon brush 4 and the triangular fixing frame 5 are fixed by the traction force of the machine base 11, the double-arc-shaped carbon brush 4 is electrically connected with the double-sided slip ring 7, the sensor 10 generates an electric signal according to the temperature change of the rotor and transmits the electric signal to the double-sided slip ring 7 through the conducting wire, the double-arc-shaped carbon brush 4 rotates in the double-sided slip ring 7, the double-arc-shaped carbon brush 4 and the double-sided slip ring are in mutual contact and maintain the electric signal conduction together, the electric signal generated by the sensor 10 is finally acquired by the acquisition card 14 through the double-arc-shaped carbon brush 4, the acquisition card 14 converts an analog signal into a digital signal and transmits the digital signal to the computer 13, and the temperature of the rotor 9 is displayed in the computer 13.
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 device for measuring the temperature of the motor rotor is characterized by comprising a machine base (11), a rotor (9), a synchronizing device and a measuring device, wherein the rotor (9) is arranged inside the machine base (11), the measuring device comprises a sensor (10) and a computer (13), the sensor (10) is fixedly arranged on the rotor (9), and the computer (13) is electrically connected with the sensor (10) through the synchronizing device.
2. The device for measuring the temperature of the rotor of the motor is characterized in that the synchronizing device comprises a double-sided slip ring (7), a double-arc-shaped carbon brush (4) and a triangular fixing frame (5), wherein the double-arc-shaped carbon brush (4) is arranged inside a ring groove of the double-sided slip ring (7), and a copper ring is arranged at the bottom of the double-sided slip ring (7); the output of rotor (9) is pivot (1), two-sided sliding ring (7) cup joint on pivot (1), two-sided sliding ring (7) are provided with wire guide (71), triangle mount (5) one end and double arc carbon brush (4) fixed connection, the other end and frame (11) fixed connection.
3. The device for measuring the temperature of the rotor of the motor according to claim 2, wherein the measuring device further comprises an acquisition card (14), a wiring port (41) is formed at one end of the double-arc-shaped carbon brush (4) far away from the rotor (9), the double-arc-shaped carbon brush (4) is connected with the acquisition card (14) through the wiring port (41), and the acquisition card (14) converts an analog quantity signal into a digital quantity signal and transmits the digital quantity signal to the computer (13).
4. The device for measuring the temperature of the motor rotor is characterized in that the middle part of the double-arc-shaped carbon brush (4) is made of non-conductive materials, one end of the triangular fixing frame (5) is fixedly connected with the middle part of the double-arc-shaped carbon brush (4), and the other end of the triangular fixing frame is fixedly connected with the base (11); the cross section of the triangular fixing frame (5) is circular at one end close to the double-arc-shaped carbon brush (4) and is rectangular at one end close to the inner wall of the engine base (11).
5. The device for measuring the temperature of the rotor of the motor is characterized in that the double-arc carbon brush (4) is in interference fit with the triangular fixing frame (5), and the surface of the double-arc carbon brush (4) is made of copper material.
6. A device for measuring the temperature of the rotor of an electric motor according to claim 2, wherein the synchronizing device further comprises a wire track (8), one end of the wire track (8) is fixedly connected with the sensor (10), the other end of the wire track is fixedly connected with the double-sided slip ring (7), the wire track is a Y-shaped wire track, and comprises a trunk wire track and a branch wire track, the trunk wire track is arranged at the end of the sensor (10), and the branch wire track is arranged at the end of the double-sided slip ring (7).
7. A device for measuring the temperature of the rotor of an electric machine according to claim 6, characterised in that the sensor (10) is provided with a cylindrical outlet (101), the cylindrical outlet (101) being in embedded connection with the mains rail end.
8. A device for measuring the rotor temperature of an electric machine according to claim 6, characterized in that the branch rails are fixedly connected by two magnetic suction seats and a double-sided slip ring (7), and the main and branch rails are telescopic and twistable according to the size and shape of the electric machine.
9. The device for measuring the temperature of the rotor of the motor is characterized in that two ends of the rotating shaft (1) are connected with bearings (2), the bearings (2) are fixed on a cushion block (6) through a bearing seat (3), and the cushion block (6) and the base (11) of the motor are fixed on a floor through fixing screws (12).
10. A measuring method for measuring the temperature of a motor rotor comprises the following steps:
s1: a double-sided slip ring (7) is fixedly sleeved on a motor rotor (9), a double-arc carbon brush (4) is arranged in the double-sided slip ring (7), and when the double-arc carbon brush (4) and the double-sided slip ring (7) rotate relatively, the double-arc carbon brush is well contacted and uniformly stressed, so that an electric signal is continuously conducted when the motor is electrified;
s2: a sensor (10) is fixed on a rotor (9), and a wire rail (8) is arranged between a wire outlet (101) of the sensor (10) and a double-sided slip ring (7) and is used as a wiring channel of a wire;
s3: when the motor is operated, the sensor (10) generates an electric signal which changes along with the temperature, the electric signal is collected by the collection card (14) through the double-sided slip ring (7) and the double-arc-shaped carbon brush (4), and finally the electric signal is transmitted to the computer (13), and the temperature of the rotor (9) can be obtained according to the electric signal and the sensitivity of the sensor (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110090079.1A CN113155312B (en) | 2021-01-22 | 2021-01-22 | Device and method for measuring temperature of motor rotor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110090079.1A CN113155312B (en) | 2021-01-22 | 2021-01-22 | Device and method for measuring temperature of motor rotor |
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| Publication Number | Publication Date |
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| CN113155312A true CN113155312A (en) | 2021-07-23 |
| CN113155312B CN113155312B (en) | 2023-02-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110090079.1A Active CN113155312B (en) | 2021-01-22 | 2021-01-22 | Device and method for measuring temperature of motor rotor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114754886A (en) * | 2022-06-16 | 2022-07-15 | 苏州英特模汽车科技有限公司 | Temperature measuring device and method of rotating part testing system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101345455A (en) * | 2008-08-22 | 2009-01-14 | 哈尔滨理工大学 | Electric motor with rotor temperature measurement terminal and its rotor temperature on-line measurement apparatus |
| KR101925102B1 (en) * | 2018-10-17 | 2018-12-04 | (주)대한중전기 | A Rotor Temperature Measurement Device for Underwater Pump |
| CN209134239U (en) * | 2018-10-12 | 2019-07-19 | 广州汽车集团股份有限公司 | A kind of device measuring motor rotor temperature |
| CN112242780A (en) * | 2020-09-29 | 2021-01-19 | 中车永济电机有限公司 | Permanent magnet synchronous motor with rotor temperature measuring device |
-
2021
- 2021-01-22 CN CN202110090079.1A patent/CN113155312B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101345455A (en) * | 2008-08-22 | 2009-01-14 | 哈尔滨理工大学 | Electric motor with rotor temperature measurement terminal and its rotor temperature on-line measurement apparatus |
| CN209134239U (en) * | 2018-10-12 | 2019-07-19 | 广州汽车集团股份有限公司 | A kind of device measuring motor rotor temperature |
| KR101925102B1 (en) * | 2018-10-17 | 2018-12-04 | (주)대한중전기 | A Rotor Temperature Measurement Device for Underwater Pump |
| CN112242780A (en) * | 2020-09-29 | 2021-01-19 | 中车永济电机有限公司 | Permanent magnet synchronous motor with rotor temperature measuring device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114754886A (en) * | 2022-06-16 | 2022-07-15 | 苏州英特模汽车科技有限公司 | Temperature measuring device and method of rotating part testing system |
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| CN113155312B (en) | 2023-02-24 |
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