CN215813156U - Subway traction motor insulation bearing shaft current damage simulation device - Google Patents
Subway traction motor insulation bearing shaft current damage simulation device Download PDFInfo
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- CN215813156U CN215813156U CN202122182342.8U CN202122182342U CN215813156U CN 215813156 U CN215813156 U CN 215813156U CN 202122182342 U CN202122182342 U CN 202122182342U CN 215813156 U CN215813156 U CN 215813156U
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Abstract
The utility model discloses a subway traction motor insulation bearing shaft current damage simulation device which comprises a driving device, wherein the driving device comprises a traction motor, the traction motor is installed on a test bed, the traction motor is connected with one end of an experiment main shaft through an insulation coupling, the other end of the experiment main shaft is fixedly connected with an insulation bearing inner ring, an insulation bearing is installed on a loading bearing seat, the loading bearing seat is installed on the test bed, a data acquisition unit, a shaft current simulation device and a train vibration simulation device are arranged on the test bed, and the data acquisition unit, the shaft current simulation device and the train vibration simulation device are all connected with the insulation bearing. The method can simulate the performance degradation process of the insulated bearing of the subway traction motor under the coupling action of mechanical damage, train vibration and current damage and the influence on the service life of the insulated bearing, and provides an experimental basis for researching the fault characteristics of the motor bearing.
Description
Technical Field
The utility model relates to a current damage simulation device for an insulating bearing shaft of a subway traction motor.
Background
The traction motor is one of the key parts of the subway vehicle, in recent years, the problem of electric corrosion of the traction motor bearing of the domestic subway line subway vehicle is more and more serious, and if the problem of electric corrosion of the traction motor cannot be effectively controlled, the normal operation of the subway vehicle is influenced.
The power converter of the pulse width modulation technology is widely applied to a motor driving system, the output of a traction motor frequency converter cannot achieve complete three-phase balance, high-frequency common-mode voltage generated by unbalance can induce high-amplitude bearing voltage on a motor rotating shaft, and shaft current is formed. Studies on the reliability of motors have shown that 30% of motor damage is caused by shaft current, and this value is increasing at a surprising rate with the widespread use of high performance devices such as IGBTs.
The existing simulation experiment table for the shaft current corrosion in the actual working condition of the train is few, so that the simulation experiment table for the shaft current corrosion in the running process of the train needs to be constructed urgently, the characteristic index design is extracted, and the degradation rule of the bearing is analyzed.
Disclosure of Invention
In order to solve the technical problems, the utility model provides the current damage simulation device for the insulating bearing shaft of the subway traction motor, which is simple in structure and convenient to operate.
The technical scheme for solving the technical problems is as follows: the device comprises a driving device, an insulating bearing, a test bed, a shaft current simulation device, a train vibration simulation device and a data acquisition unit, wherein the driving device comprises a traction motor, the traction motor is installed on the test bed, the traction motor is connected with one end of an experiment main shaft through an insulating coupling, the other end of the experiment main shaft is fixedly connected with an inner ring of the insulating bearing, the insulating bearing is installed on a loading bearing seat, the loading bearing seat is installed on the test bed, the test bed is provided with the data acquisition unit for monitoring the vibration, current and voltage change conditions in the damage process of the insulating bearing, the test bed is provided with the shaft current simulation device for simulating the shaft current of the motor and the train vibration simulation device for simulating the vibration conditions in the running of trains under various working conditions, and the data acquisition unit, the shaft current simulation device and the data acquisition unit, The shaft current simulation device and the train vibration simulation device are connected with the insulation bearing.
According to the subway traction motor insulation bearing shaft current damage simulation device, the data acquisition unit comprises the current sensor, the vibration sensor, the acquisition card and the acquisition device, the current sensor and the vibration sensor are installed on the loading bearing seat, and the signal output ends of the current sensor and the vibration sensor are connected with the acquisition device through the acquisition card.
Above-mentioned subway traction motor insulation bearing axle current damage analogue means, train vibration analogue means includes vibration exciter, semi-arch slide rail, slider, connecting rod, crank connecting rod, main shaft, shaft coupling and direct current motor, semi-arch slide rail is installed on the test bench and is located the insulation bearing top, and the slider is inlayed in the slide rail and can be followed the slide rail and carry out circular motion, and the vibration exciter is installed on the slider, direct current motor installs on the test bench, and direct current motor is connected with main shaft one end through the shaft coupling, and the main shaft other end links to each other with the slider behind crank connecting rod, the connecting rod, drives the slider and is circular motion in the slide rail, and the vibration exciter is circular motion along with the slider together, and vibration exciter friction insulation bearing makes the insulation coating part damage in the insulation bearing.
The subway traction motor insulation bearing shaft current damage simulation device comprises a direct-current power supply, a conducting wire, an electric brush and an iron sheet, wherein the power supply is connected with the iron sheet and the electric brush through the conducting wire respectively, the iron sheet is in contact with a damaged part of an insulation coating of an insulation bearing, current is led in from the damaged part of the insulation coating, and an oil film and the electric brush are broken down to form a loop.
According to the current damage simulation device for the insulating bearing shaft of the subway traction motor, the upper part of the loading bearing seat is hollow, and the vibration exciter is used for directly acting on the insulating bearing outer ring coating.
According to the subway traction motor insulation bearing shaft current damage simulation device, the side surface part of the lower portion of the sliding rail is hollow and is used for placing the iron sheet device.
According to the subway traction motor insulation bearing shaft current damage simulation device, insulation gaskets are arranged at the bottoms of the traction motor and the loading bearing seat.
The utility model has the beneficial effects that:
1. the traction motor is connected with the experiment main shaft through the insulation coupling, the experiment insulation bearing is driven to rotate, and the operation is safe.
2. The utility model is suitable for installing the insulating bearing with the inner diameter size range of 50-120 mm, the outer diameter size range of 90-200 mm and the width size range of 18-62 mm, and has wide application range.
3. According to the utility model, the upper part of the loading bearing seat is hollowed out, so that the vibration exciter directly acts on the insulating bearing outer ring coating, and the insulating washers are added at the bottom of the traction motor and the loading bearing seat, therefore, the insulating effect is better.
4. According to the utility model, the vibration exciter is arranged on the sliding block of the semi-arch slide rail, the direct current motor is connected with the main shaft through the coupler to rotate, so as to continuously provide rotating power for the crank connecting rod, the crank connecting rod is connected with the connecting rod, the connecting rod is connected with the sliding block, and the sliding block is driven to move on the slide rail, so that the vibration exciter can automatically operate in the slide rail.
5. According to the utility model, the vibration exciter reciprocates on the sliding rail, and the vibration exciter rubs the insulating bearing, so that the insulating coating in the insulating bearing is partially damaged.
6. The utility model transmits the exciting force output by the vibration exciter to the insulating bearing, and adjusts the amplitude frequency of the vibration exciter to simulate the vibration condition of the train in operation under various working conditions.
7. The utility model adopts a direct current power supply to lead current into the iron sheet through a lead, the iron sheet is contacted with the damaged part of the insulating coating of the insulating bearing, the current is led from the damaged part of the insulating coating, an oil film and an electric brush are punctured to form a loop, and the current of the bearing shaft of the motor is simulated by adjusting the power supply.
8. According to the utility model, the data acquisition units, namely the vibration sensor and the current sensor, are arranged on the loading bearing seat, the signal output ends of the current sensor and the vibration sensor are connected with the acquisition device through the acquisition card so as to acquire data on the upper computer in real time, and the additional influence of vibration on the shaft current is more intuitively analyzed.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic structural diagram of the axial current loading device in fig. 1.
Fig. 3 is a schematic structural view of the semi-arched slide rail in fig. 1.
Detailed Description
The utility model is further described below with reference to the figures and examples.
As shown in fig. 1-3, a subway traction motor insulation bearing shaft current damage simulation device comprises a driving device, an insulation bearing 12, a test bed 8, a shaft current simulation device, a train vibration simulation device and a data acquisition unit 17, wherein the driving device comprises a traction motor 2, the traction motor 2 is installed on the test bed 8, the traction motor 2 is connected with one end of an experiment main shaft 4 through an insulation coupling 3, the other end of the experiment main shaft 4 is fixedly connected with an inner ring of the insulation bearing 12, the insulation bearing 12 is installed on a loading bearing seat 10, the loading bearing seat 10 is installed on the test bed 8, the test bed 8 is provided with the data acquisition unit 17 for monitoring vibration, current and voltage change conditions in the damage process of the insulation bearing 12, the test bed 8 is provided with the shaft current simulation device for simulating the magnitude of shaft current in the motor and the train vibration simulation device for simulating the vibration condition in the train operation under various working conditions, the data acquisition unit 17, the shaft current simulation device and the train vibration simulation device are all connected with the insulation bearing 12. And insulating gaskets are arranged at the bottoms of the traction motor 2 and the loading bearing seat 10.
The data acquisition unit 17 comprises a current sensor, a vibration sensor, an acquisition card and an acquisition device, the current sensor and the vibration sensor are arranged on the loading bearing seat 10, and the signal output ends of the current sensor and the vibration sensor are connected with the acquisition device through the acquisition card.
Train vibration analogue means includes vibration exciter 9, semi-arch slide rail 7, slider 6, connecting rod 5, crank connecting rod 14, main shaft 15, shaft coupling 16 and direct current motor 1, semi-arch slide rail 7 is installed on test bench 8 and is located insulating bearing 12 top, and slider 6 inlays and can carry out circular motion in the slide rail along the slide rail, and vibration exciter 9 is installed on slider 6, direct current motor 1 is installed on test bench 8, and direct current motor 1 is connected with 15 one end of main shaft through shaft coupling 16, links to each other with slider 6 behind 15 other ends of main shaft warp crank connecting rod 14, the connecting rod 5, drives slider 6 and is circular motion in the slide rail, and vibration exciter 9 is circular motion along with slider 6 together, and vibration exciter 9 rubs insulating bearing 12, makes insulating coating part damage in the insulating bearing 12.
The shaft current simulation device comprises a direct current power supply 19, a lead 20, an electric brush 11 and an iron sheet 13, wherein the power supply is respectively connected with the iron sheet 13 and the electric brush 11 through the lead 20, the iron sheet 13 is in contact with the damaged part of the insulating coating of the insulating bearing 12, current is led in from the damaged part of the insulating coating, and the breakdown oil film and the electric brush 11 form a loop.
The upper part of the loading bearing seat 10 is hollowed out and is used for directly acting the vibration exciter 9 on the coating of the outer ring of the insulating bearing 12. The side part of the lower part of the slide rail is hollow and is used for placing an iron sheet 13 device.
The working principle of the utility model is as follows:
1. insulating bearing damage part: an insulating bearing 12 with a corresponding size is installed in the loading bearing seat 10, and the vibration exciter 9 makes reciprocating circular motion in the sliding rail to rub with the outer ring of the insulating bearing 12, so that part of the insulating coating falls off. The design can effectively destroy part of the insulating coating on the insulating bearing 12, and is convenient for simulating the shaft current corrosion.
2. Shaft current loading part: the current source is a direct current power supply 19, during experiments, current is led into the iron sheet 13 through a lead 20, the iron sheet 13 is in contact with the damaged part of the insulating coating of the insulating bearing 12, the current is led into the damaged part of the insulating coating, an oil film is broken down to form a loop with the electric brush 11, and the current of the bearing shaft of the motor is simulated by adjusting parameters of the direct current power supply 19.
3. A train vibration simulation loading part: the exciting force output by the vibration exciter 9 is transmitted to the insulating bearing 12, and the amplitude frequency of the vibration exciter 9 is adjusted to simulate the vibration condition of the train in operation under various working conditions.
4. The moving part of the vibration exciter 9 is as follows: the traction motor 2 drives the main shaft 15 to drive the crank connecting rod 14 and the connecting rod 5 to rotate, and the connecting rod 5 is connected with the sliding block 6 to drive the sliding block 6 to do reciprocating circular motion in the semi-arch-shaped sliding rail 7.
5. The utility model is provided with a data acquisition unit 17 which can acquire the current on the insulated bearing 12 in real time, and the current and vibration parameter data are finally stored in an upper computer 18 acquisition system through a current sensor, a vibration sensor, an acquisition card and an acquisition device, thereby providing an experimental basis and a technical support for the shaft current damage simulation of the insulated bearing 12 of the traction motor 2 under the vibration action.
Claims (7)
1. A subway traction motor insulation bearing shaft current damage simulation device is characterized by comprising a driving device, an insulation bearing, a test bed, a shaft current simulation device, a train vibration simulation device and a data acquisition unit, wherein the driving device comprises a traction motor which is arranged on the test bed, the traction motor is connected with one end of an experiment main shaft through an insulation coupling, the other end of the experiment main shaft is fixedly connected with an inner ring of the insulation bearing, the insulation bearing is arranged on a loading bearing seat which is arranged on the test bed, the test bed is provided with the data acquisition unit for monitoring vibration, current and voltage change conditions in the insulation bearing damage process, the test bed is provided with the shaft current simulation device for simulating the shaft current of the motor and the train vibration simulation device for simulating the vibration condition of a train in operation under various working conditions, the data acquisition unit, the shaft current simulation device and the train vibration simulation device are all connected with the insulating bearing.
2. The device for simulating the current damage of the insulating bearing shaft of the subway traction motor according to claim 1, wherein the data acquisition unit comprises a current sensor, a vibration sensor, an acquisition card and an acquisition device, the current sensor and the vibration sensor are mounted on the loading bearing seat, and signal output ends of the current sensor and the vibration sensor are connected with the acquisition device through the acquisition card.
3. The subway traction motor insulated bearing shaft current damage simulation device according to claim 1, wherein the train vibration simulation device comprises a vibration exciter, a semi-arch-shaped slide rail, a slide block, a connecting rod, a crank connecting rod, a main shaft, a coupler and a direct current motor, the semi-arch-shaped slide rail is installed on a test bed and located above the insulated bearing, the slide block is embedded in the slide rail and can move circularly along the slide rail, the vibration exciter is installed on the slide block, the direct current motor is installed on the test bed and connected with one end of the main shaft through the coupler, the other end of the main shaft is connected with the slide block through the crank connecting rod and the connecting rod to drive the slide block to move circularly in the slide rail, the vibration exciter makes circular motion along with the slide block, and the vibration exciter rubs the insulated bearing to damage an insulated coating part in the insulated bearing.
4. The simulation device for current damage to the insulating bearing shaft of the subway traction motor according to claim 3, wherein the simulation device for shaft current comprises a direct current power supply, a conducting wire, an electric brush and an iron sheet, the power supply is respectively connected with the iron sheet and the electric brush through the conducting wire, the iron sheet is in contact with a damaged part of an insulating coating of the insulating bearing, current is led into the damaged part of the insulating coating, and an oil film is broken down to form a loop with the electric brush.
5. The subway traction motor insulation bearing shaft current damage simulation device according to claim 3, wherein the upper portion of the loading bearing seat is hollowed out and is used for a vibration exciter to directly act on the insulation bearing outer ring coating.
6. The current damage simulation device of the insulating bearing shaft of the subway traction motor as claimed in claim 4, wherein the lower side portion of the slide rail is hollowed out for placing an iron sheet device.
7. The subway traction motor insulation bearing shaft current damage simulation device according to claim 1, wherein insulation gaskets are arranged at the bottoms of the traction motor and the loading bearing pedestal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122182342.8U CN215813156U (en) | 2021-09-10 | 2021-09-10 | Subway traction motor insulation bearing shaft current damage simulation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122182342.8U CN215813156U (en) | 2021-09-10 | 2021-09-10 | Subway traction motor insulation bearing shaft current damage simulation device |
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| Publication Number | Publication Date |
|---|---|
| CN215813156U true CN215813156U (en) | 2022-02-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122182342.8U Active CN215813156U (en) | 2021-09-10 | 2021-09-10 | Subway traction motor insulation bearing shaft current damage simulation device |
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| CN (1) | CN215813156U (en) |
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2021
- 2021-09-10 CN CN202122182342.8U patent/CN215813156U/en active Active
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