CN218006073U - Rotor temperature rise detection device of generator - Google Patents
Rotor temperature rise detection device of generator Download PDFInfo
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- CN218006073U CN218006073U CN202221624850.5U CN202221624850U CN218006073U CN 218006073 U CN218006073 U CN 218006073U CN 202221624850 U CN202221624850 U CN 202221624850U CN 218006073 U CN218006073 U CN 218006073U
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- generator
- temperature rise
- slot wedge
- infrared
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Abstract
The utility model relates to the technical field of generators, and discloses a rotor temperature rise detection device of a generator, wherein a rotor of the generator comprises a slot wedge and a copper bar connected with the slot wedge, a stator of the generator comprises a ventilation slot, and the rotor temperature rise detection device of the generator comprises a pressure sensor, a signal converter, an infrared transmitting device and an infrared receiving device; the pressure sensor is positioned between the slot wedge and the copper bar and is used for measuring the pressure between the slot wedge and the copper bar; the signal converter is electrically connected with the pressure sensor; the infrared emission device is electrically connected with the signal converter, and the infrared emission device and the signal converter are both arranged in the slot wedge; the infrared receiving device is used for receiving the infrared signal sent by the infrared transmitting device and is arranged in the ventilation groove. The rotor temperature rise detection device of the generator can detect the temperature rise of the generator rotor in actual work.
Description
Technical Field
The utility model relates to a generator technical field especially relates to a rotor temperature rise detection device of generator.
Background
When the generator operates, a part of energy is lost, and the loss is converted into heat, so that the temperature of each part of the motor is increased. If the heat dissipated in the unit time is equal to the heat generated by loss, the temperature of each part of the motor is stabilized at a certain value; on the contrary, the temperature of each part of the motor is gradually increased and exceeds the allowable temperature of the insulating material or the structural component, so that the insulating material or the structural component is rapidly aged or damaged, and the service life of the motor is shortened. Therefore, when the generator is operated under load, it is one of the most important conditions for the generator to be operated safely over the lifetime by controlling the temperature of each part so as not to exceed the allowable temperature limit. Therefore, the temperature of each part of the motor must be measured through a temperature rise test.
At present, the temperature rise of a generator rotor is usually difficult to detect, the existing detection modes are realized in a laboratory stage, and the temperature rise of the generator rotor in actual work cannot be detected.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a rotor temperature rise detection device of generator can carry out the temperature rise to the generator rotor in the actual work and detect.
In order to achieve the above object, the present invention provides a rotor temperature rise detection device of a generator, wherein a rotor of the generator comprises a slot wedge and a copper bar connected with the slot wedge, a stator of the generator comprises a ventilation slot, and the rotor temperature rise detection device of the generator comprises a pressure sensor, a signal converter, an infrared emission device and an infrared receiving device; the pressure sensor is positioned between the slot wedge and the copper bar and is used for measuring the pressure between the slot wedge and the copper bar; the signal converter is electrically connected with the pressure sensor; the infrared emission device is electrically connected with the signal converter, and the infrared emission device and the signal converter are both arranged in the slot wedge; the infrared receiving device is used for receiving the infrared signal sent by the infrared transmitting device, and the infrared receiving device is arranged in the ventilation groove.
Further, still include the battery, the battery with signal converter electricity is connected, the battery is located in the slot wedge.
Further, still include first wireless charging device and second wireless charging device, first wireless charging device with the battery electricity is connected, first wireless charging device locates in the slot wedge, the second wireless charging device locates in the ventilation groove, the second wireless charging device is used for to first wireless charging device transmission electric energy.
Further, the infrared receiving device also comprises a central control system which is electrically connected with the infrared receiving device.
Further, the pressure sensor is embedded in the bottom surface of the slot wedge, and the lower surface of the pressure sensor protrudes out of the bottom surface of the slot wedge by 0.4-0.6mm.
Further, the width of the ventilation groove is 6-10mm.
Further, the length of the stator of the generator is greater than or equal to 100mm.
Further, the infrared receiving device has a plurality of, a plurality of the infrared receiving device sets up along the circumference of stator.
Compared with the prior art, the rotor temperature rise detection device of the generator provided by the technical scheme has the advantages that: in the actual operation process of the generator, when the rotor coil is heated and expanded, the copper bar has an expansion amount towards the slot wedge, the expansion amount is increased along with the temperature rise of the rotor coil, the pressure value between the copper plate and the slot wedge is changed due to the change of the expansion amount, the pressure change between the copper bar and the slot wedge is measured through the pressure sensor, and the pressure value is converted into an infrared signal to be transmitted to the infrared receiving device; therefore, the pressure change between the copper bar and the slot wedge can be converted through the infrared signal received by the infrared receiving device, and the corresponding temperature rise value of the generator rotor can be obtained.
Drawings
Fig. 1 is a schematic structural diagram of a stator of a generator according to an embodiment of the present invention;
fig. 2 is a schematic structural view of a rotor of a generator according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a slot wedge and a copper bar according to an embodiment of the present invention;
fig. 4 is a cross-sectional view of a slot wedge of an embodiment of the present invention;
fig. 5 is a schematic diagram of a rotor temperature rise detection device of a generator according to an embodiment of the present invention.
Wherein, 1, a slot wedge; 2. copper bars; 3. a ventilation slot; 4. a pressure sensor; 5. a signal converter; 6. an infrared emitting device; 7. an infrared receiving device; 8. a battery; 9. a first wireless charging device; 10. a second wireless charging device; 11. and a central control system.
Detailed Description
The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.
In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", and the like are used in the present invention as indicating orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, should not be construed as limiting the present invention.
As shown in fig. 1-5, the embodiment of the utility model provides a rotor temperature rise detection device of generator and this generator, this generator can be for latent utmost turbo generator, and the rotor of generator includes slot wedge 1 and the copper bar 2 of being connected with slot wedge 1, and the rotor adopts the fluting structure, and the notch is the dovetail structure, is equipped with the slot wedge 1 that the metal diamagnetized at the notch. The rotor is internally provided with a winding which is bound and insulated, and the slot wedge 1 is used for fixing the rotor winding. During operation, the slot wedge 1 is subjected to the centrifugal force of the rotor winding, which is a constant value at the nominal rotational speed.
As shown in fig. 1-5, when the rotor coil is operated by power, the loss of the rotor coil itself generates heat, causing the coil to heat up and expand. When the coil heats up and expands, the rotor copper bar 2 has an expansion amount upwards, the expansion amount increases along with the temperature rise of the rotor coil, and meanwhile, the slot wedge 1 is under the action of extrusion force generated by the expansion of the coil, and the extrusion force changes along with the expansion amount. The stator of the generator comprises a ventilation groove 3, the width of the ventilation groove 3 is 6-10mm, and the length of the stator is more than or equal to 100mm.
As shown in fig. 1 to 5, the rotor temperature rise detection device of the generator includes a pressure sensor 4, a signal converter 5, an infrared emission device 6, and an infrared reception device 7. The pressure sensor 4 is positioned between the slot wedge 1 and the copper bar 2, and the pressure sensor 4 is used for measuring the pressure between the slot wedge 1 and the copper bar 2 and detecting the pressure of centrifugal force generated by the rotor winding in rotation on the slot wedge 1 in real time. When the generator is in load operation, the rotor winding is heated and expanded, and the pressure borne by the rotor slot wedge 1 changes along with the temperature rise of the rotor winding. The signal converter 5 is electrically connected with the pressure sensor 4, and the signal converter 5 is used for converting the signal of the pressure sensor 4 into an infrared signal. The infrared emission device 6 is electrically connected with the signal converter 5, and both the infrared emission device 6 and the signal converter 5 are arranged in the slot wedge 1. The infrared receiving device 7 is used for receiving the infrared signal sent by the infrared transmitting device 6, and the infrared receiving device 7 is arranged in the ventilation groove 3.
Based on the scheme, in the actual operation process of the generator, when the rotor coil is heated and expanded, the copper bar 2 has an expansion amount towards the slot wedge 1, the expansion amount is increased along with the temperature rise of the rotor coil, the pressure value between the copper plate and the slot wedge 1 is changed due to the change of the expansion amount, the pressure sensor 4 is used for measuring the pressure change between the copper bar 2 and the slot wedge 1, and the pressure value is converted into an infrared signal to be transmitted to the infrared receiving device 7; therefore, the pressure change between the copper bar 2 and the slot wedge 1 can be converted through the infrared signal received by the infrared receiving device 7, so that the temperature rise value of the corresponding generator rotor can be obtained.
As shown in fig. 1-5, the slot wedge 1 is provided with an inner cavity, and the pressure sensor 4, the signal converter 5 and the infrared emitting device 6 are all arranged in the inner cavity of the slot wedge 1. In this embodiment, the rotor temperature rise detection device of the generator further includes a battery 8 disposed in the inner cavity of the slot wedge 1, and the battery 8 is electrically connected to the signal converter 5 and is used for providing electric energy. In this embodiment, in order to charge the battery 8, a uwb wireless charging technology may be adopted, the rotor temperature rise detection device of the generator further includes a first wireless charging device 9 and a second wireless charging device 10, the first wireless charging device 9 is electrically connected to the battery 8, the first wireless charging device 9 is disposed in the slot wedge 1, the second wireless charging device 10 is disposed in the ventilation slot 3, and the second wireless charging device 10 is configured to transmit electric energy to the first wireless charging device 9. When the generator is stopped for maintenance, the rotor is stopped at a specific angle, or the generator rotor is adjusted to a specific angle, the first wireless charging device 9 and the second wireless charging device 10 are matched to wirelessly charge the battery 8 arranged in the rotor slot wedge 1. In order to maintain the charge of the battery 8, the infrared signal may default to a periodic transmission mode (once a fixed time period of a day) or a triggered transmission mode (transmitted when the pressure value has broken a certain value). Or sending a signal acquisition command in the system, and starting data acquisition after transmitting the command through the infrared sensor.
As shown in fig. 5, the generator rotor temperature rise detection device further includes a central control system 11 electrically connected to the infrared receiving device 7, and the central control system 11 is configured to convert the pressure value into a generator rotor temperature rise value through calculation.
As shown in fig. 4 to 5, in the present embodiment, the pressure sensor 4 is embedded in the bottom surface of the wedge 1, and the lower surface of the pressure sensor 4 protrudes 0.4 to 0.6mm, preferably 0.5mm, from the bottom surface of the wedge 1. The part of the pressure sensor 4 protruding out of the bottom surface of the slot wedge 1 is used for abutting against the copper bar 2. In order to guarantee the accuracy of infrared signal reception, a plurality of infrared receiving devices 7 can be arranged in the same ventilation groove 3 at the circumferential position of the generator stator. Meanwhile, the time length of the infrared signal sent out by the slot wedge 1 at least maintains the time length of 3 circles of rotor rotation, so as to ensure that the infrared emission device 6 installed in the stator ventilation slot 3 channel receives enough signals. In order to guarantee the operation safety, all sensors should be correspondingly tested during design or model selection so as to meet the use requirement on the rotating equipment. Meanwhile, the safety of the slot wedge 1 is calculated, enough safety factor is reserved, and the running safety of the motor is guaranteed.
To sum up, the embodiment of the utility model provides a rotor temperature rise detection device of generator, based on sensor and signal converter 5's technique, change the pressure that generator rotor temperature rise inflation volume arouses into infrared signal. The infrared emission device 6 is arranged on the slot wedge 1 of the generator rotor, and the infrared signal is aligned to the ventilation slot 3 of the generator stator. Meanwhile, an infrared receiving device 7 is arranged in the ventilation slot 3 of the stator, and the position of the infrared receiving device 7 is adjusted to enable the infrared receiving device to rotate an infrared transmitting device 6 on the rotor slot wedge 1 of the generator. The infrared receiving device 7 in the ventilation groove 3 transmits data to the central control system 11 through an external signal sensor or a related interface through network signals, and the temperature rise value of the generator rotor can be obtained after data conversion.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and replacements can be made without departing from the technical principle of the present invention, and these modifications and replacements should also be regarded as the protection scope of the present invention.
Claims (8)
1. The utility model provides a rotor temperature rise detection device of generator, the rotor of generator include the slot wedge and with the copper bar that the slot wedge is connected, the stator of generator includes the ventilation groove, its characterized in that, the rotor temperature rise detection device of generator includes:
the pressure sensor is positioned between the slot wedge and the copper bar and is used for measuring the pressure between the slot wedge and the copper bar;
a signal converter electrically connected to the pressure sensor;
the infrared emission device is electrically connected with the signal converter, and the infrared emission device and the signal converter are both arranged in the slot wedge; and
and the infrared receiving device is used for receiving the infrared signals sent by the infrared transmitting device, and the infrared receiving device is arranged in the ventilation groove.
2. The temperature rise detection device for a rotor of a generator according to claim 1, wherein: still include the battery, the battery with signal converter electricity is connected, the battery is located in the slot wedge.
3. The temperature rise detection device for a rotor of a generator according to claim 2, wherein: still include first wireless charging device and the wireless charging device of second, first wireless charging device with the battery electricity is connected, first wireless charging device is located in the slot wedge, the wireless charging device of second is located in the ventilation groove, the wireless charging device of second be used for to first wireless charging device transmission electric energy.
4. The temperature rise detection device for a rotor of a generator according to claim 1, wherein: the infrared receiving device is electrically connected with the infrared receiving device.
5. The temperature rise detection device for a rotor of a generator according to claim 1, wherein: the pressure sensor is embedded into the bottom surface of the slot wedge, and the lower surface of the pressure sensor protrudes out of the bottom surface of the slot wedge by 0.4-0.6mm.
6. The temperature rise detecting device for the rotor of the generator according to claim 1, wherein: the width of the ventilation groove is 6-10mm.
7. The temperature rise detection device for a rotor of a generator according to claim 1, wherein: the length of the stator of the generator is more than or equal to 100mm.
8. The temperature rise detection device for a rotor of a generator according to claim 1, wherein: the infrared receiving device is provided with a plurality of infrared receiving devices which are arranged along the circumferential direction of the stator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221624850.5U CN218006073U (en) | 2022-06-27 | 2022-06-27 | Rotor temperature rise detection device of generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221624850.5U CN218006073U (en) | 2022-06-27 | 2022-06-27 | Rotor temperature rise detection device of generator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218006073U true CN218006073U (en) | 2022-12-09 |
Family
ID=84313351
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221624850.5U Active CN218006073U (en) | 2022-06-27 | 2022-06-27 | Rotor temperature rise detection device of generator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218006073U (en) |
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2022
- 2022-06-27 CN CN202221624850.5U patent/CN218006073U/en active Active
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