CN215296211U - Monitoring system for gearbox - Google Patents
Monitoring system for gearbox Download PDFInfo
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- CN215296211U CN215296211U CN202121133356.4U CN202121133356U CN215296211U CN 215296211 U CN215296211 U CN 215296211U CN 202121133356 U CN202121133356 U CN 202121133356U CN 215296211 U CN215296211 U CN 215296211U
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- monitoring system
- planet carrier
- identification device
- planet
- peripheral surface
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Abstract
The utility model provides a monitoring system for gear box, gear box includes: the monitoring system comprises a planet carrier of an input flange, a moment arm, an end cover arranged on the moment arm and a plurality of planet wheels arranged in the planet carrier, the monitoring system comprises a distance sensor and an identification device, the identification device is circumferentially and fixedly arranged on the outer peripheral surface of the planet carrier close to the moment arm end cover, the identification device circumferentially comprises a calibration part, and each calibration part circumferentially corresponds to the position of each planet wheel one by one; the distance sensor is fixed in the moment arm end cover and extends in the radial direction of the moment arm end cover, the detection end of the distance sensor is close to the identification device in the radial direction, and the distance sensor is used for measuring the displacement of the calibration part and generating a feedback signal to determine the displacement of the planet carrier and the position of the planet wheel in the circumferential direction. Through the detection of the calibration part, the displacement of the planet carrier can be obtained, and the state monitoring in the running process of the gear box is facilitated; the real-time position of the planet wheel in the circumferential direction of revolution can be accurately obtained.
Description
Technical Field
The utility model relates to a monitoring system, in particular to a monitoring system for gear box.
Background
The gearbox is used as a key mechanical part of a wind power generation system (wind turbine), and the reliability and online monitoring of the gearbox are particularly important. The existing gearbox monitoring system mainly collects oil temperature, oil pressure, gearbox rotating speed and gearbox vibration signals of lubricating oil in a gearbox, and judges whether potential failure of the gearbox exists according to collected data.
In most wind power gear boxes, because of increasing power, the wind power gear boxes all adopt a planetary transmission mechanism to realize transmission. A typical wind power gearbox has a two-stage planetary mechanism and a one-stage parallel shaft mechanism. Because lubricating oil is added after the planetary mechanism is arranged, and the position of the planet wheel influences the level of the lubricating oil, the accurate position of the planet wheel is difficult to judge in practice, so that the addition of the lubricating oil is difficult to control.
Furthermore, since the first stage planetary mechanism generally operates at a lower speed and a higher load, the size and weight of the components in the first stage planetary mechanism increase as the power of the gearbox increases, and the components of the first stage planetary system may fail once abnormally deformed when operating at a higher load.
However, current gearbox monitoring systems do not collect signals that are indicative of the position of the planet wheels or that are indicative of the deformation of the components of the planetary system.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a solve among the prior art gear box monitoring system and be difficult to monitor the position of planet wheel in the gear box and be difficult to monitor the defect that the gear box part warp, especially the planet system subassembly warp, provide a monitoring system for the gear box, can accurately judge the concrete position of planet wheel in week to can calculate whether the key spare part of planet system subassembly warp.
The purpose of the utility model is realized through the following technical scheme:
a monitoring system for a gearbox, the gearbox comprising: comprising a planet carrier of an input flange, a moment arm, an end cover arranged on the moment arm and a plurality of planet wheels arranged in the planet carrier, wherein the revolution of each planet wheel and the rotation of the planet carrier are synchronous when the gear box works, the device is characterized in that the monitoring system comprises a distance sensor and an identification device, wherein,
the identification device is circumferentially and fixedly arranged on the outer peripheral surface of the planet carrier close to the moment arm end cover, the identification device circumferentially comprises calibration parts the number of which is consistent with that of the planet wheels, and each calibration part circumferentially corresponds to the position of each planet wheel one by one;
the distance sensor is fixed in the moment arm end cover and extends in the radial direction of the moment arm end cover, the detection end of the distance sensor is close to the identification device in the radial direction, and the distance sensor is used for measuring the displacement of the calibration part and generating a feedback signal to determine the displacement of the planet carrier and the position of each planet wheel in the revolution circumferential direction.
Preferably, the identification device is a toothed belt arranged on the outer peripheral surface of the planet carrier, and the calibration portion is a first toothed portion protruding on the outer peripheral surface of the toothed belt.
Preferably, the toothed belt further comprises a second raised tooth on the outer peripheral surface thereof, the first tooth and the second tooth having different shapes so that the feedback signal from the first tooth and the feedback signal from the second tooth measured and generated by the distance sensor are different.
Preferably, the height and/or width of the first tooth is different from the height and/or width of the second tooth.
Preferably, the calibration portion is a first recess portion provided in an outer peripheral surface of the carrier.
Preferably, the identification device further includes a second recess portion provided on the outer peripheral surface of the planet carrier, and the first recess portion and the second recess portion have different shapes so that the feedback signal from the first recess portion and the feedback signal from the second recess portion measured and generated by the distance sensor are different.
Preferably, the depth and/or width of the first recess is different from the depth and/or width of the second recess.
Preferably, the calibration portion is a plurality of first holes provided in an outer peripheral surface of the carrier.
Preferably, the identification means further comprises a second hole provided on the outer peripheral surface of the planet carrier, the first hole and the second hole having different shapes, hole diameters and/or numbers so that the feedback signal from the first hole and the feedback signal from the second hole measured and generated by the distance sensor are different.
Preferably, the distance sensor is further configured to detect a distance between the detecting end and each point on the identification device. If abnormal deformation occurs in the planetary system component during operation, the deformation can be detected by the distance sensor, so that potential faults can be found in advance.
The utility model discloses the technological effect who obtains is:
1. through the detection to the calibration portion, can accurately obtain the planet wheel at the ascending concrete position of revolution circumference, existing control that does benefit to lubricating oil volume of adding oil also is favorable to the maintenance of gear box.
2. The distance sensor is used for detecting the distance of the outer peripheral surface of the planet carrier, so that the data of whether the planet system component deforms or not can be obtained, and the fault monitoring of the gear box is facilitated.
Drawings
Fig. 1 shows a schematic diagram of a monitoring system according to an embodiment of the present invention, which is disposed in a planetary gear train.
Fig. 2 shows a partially enlarged view of a portion a in fig. 1.
Fig. 3 is a schematic view of a toothed belt according to an embodiment of the present invention.
Fig. 4 is a schematic view of a toothed belt according to another embodiment of the present invention.
Fig. 5 is another modification of fig. 2.
Fig. 6 shows a schematic view of a variant according to fig. 5 comprising a planet carrier, an identification means and a planet wheel.
Fig. 7 shows a schematic view of another embodiment according to the variant shown in fig. 5, comprising a planet carrier, an identification means and a planet wheel.
Detailed Description
The following further describes embodiments according to the present invention with reference to the accompanying drawings.
Referring to fig. 1-4, a monitoring system for a gearbox according to an embodiment of the present invention is described. The gear box includes: the gearbox comprises a planet carrier 1 of an input flange 10, a moment arm 4, a moment arm end cover 2 arranged on the moment arm 4 and a plurality of planet wheels 6 arranged in the planet carrier 1, wherein the revolution of each planet wheel 6 is synchronous with the rotation of the planet carrier 1 when the gearbox works, namely, the relative position relation between the planet wheel 6 and the planet carrier 1 is unchanged.
Referring mainly to fig. 2, the monitoring system includes a distance sensor 3 and an identification device 5, wherein the identification device 5 is circumferentially and fixedly disposed on the outer peripheral surface of the planet carrier 1 near the moment arm end cover 2, the identification device 5 includes, in the circumferential direction, calibration portions whose number is consistent with that of the planet wheels, and each calibration portion corresponds to the position of each planet wheel in the circumferential direction one to one. Since the relative position between the planet wheels and the planet carrier is not changed, the position of the planet wheels in the circumferential direction can be detected by monitoring the calibration part.
The distance sensor 3 is fixed in the moment arm end cover 2 and extends in the radial direction of the moment arm end cover 2, the detection end of the distance sensor 3 is close to the identification device 5 in the radial direction, the distance sensor 3 is used for measuring the displacement of the calibration part and determining the displacement of the planet carrier and the position of each planet wheel in the circumferential direction of the revolution according to the feedback signal (for example, the gear box comprises 4 planet wheels, and the 4 planet wheels are respectively located at the positions of 0 point, 3 points, 6 points and 9 points in the circumferential direction in the revolution plane of the planet wheels (see fig. 3-4) by using a clock arrangement as an example).
Referring mainly to fig. 3 to 4, the identification device 5 is a toothed belt disposed on the outer peripheral surface of the planet carrier, and the calibration portion is a first toothed portion 51 protruding from the outer peripheral surface of the toothed belt. In the normal operation of the gear box, the wind wheel drives the planetary gear train to rotate, and the identification device 5 arranged on the peripheral surface of the planetary gear train also rotates along with the planetary gear train. In the process, the distance sensor 3 is able to identify the part of the identification device that is the first tooth 51 and the part that is not the first tooth, so that the position of the planet wheel corresponding to the first tooth 51 is identified from the monitoring of the first tooth 51.
In another embodiment, the toothed belt further comprises a second raised toothed portion 52 on its outer peripheral surface, the first toothed portion 51 and the second toothed portion 52 having different shapes so that the feedback signal from the first toothed portion 51 and the feedback signal from the second toothed portion 52 measured and generated by the distance sensor are different.
Referring to fig. 3, the height of the first tooth 51 is different from the height of the second tooth 52. Referring to fig. 4, the width of the first tooth portion 51 is different from the width of the second tooth portion 52. Of course, the height and width of the first tooth portion 51 may be different from those of the second tooth portion 52. The position of the planet wheels is determined by the differently shaped arrangement of the first and second toothing 51, 52 so that different positions on the toothed belt can be detected by the distance sensor. The determination of the position of the planet wheel in the circumferential direction is also beneficial to controlling the amount of the lubricating oil injected after the assembly of the planetary gear train is finished.
With reference to fig. 5-7, a monitoring system for a gearbox according to another embodiment of the invention is described, the gearbox comprising 4 planet wheels 6, the position of which in the circumferential direction at a certain moment is shown by the dashed line in fig. 6. In this monitoring system, the identification device 50 is integrally formed with the carrier 40, and the marking portion is a first recessed portion 501 provided on the outer peripheral surface of the carrier 40. The identification means 50 further includes a second recess 502 provided on the outer peripheral surface of the planetary carrier 40, and the first recess 501 and the second recess 502 have different shapes so that the feedback signal from the first recess 501 and the feedback signal from the second recess 502 measured and generated by the distance sensor 3 are different.
Referring to fig. 6, the depth of the first recess 501 is different from the depth of the second recess 502. Referring to fig. 7, the width of the first recess 501 is different from the width of the second recess 502. In other embodiments, the depth and width of first recess 501 are different from the depth and width of second recess 502.
In addition to the recessed portion, in other embodiments, the calibration portion may be a plurality of first holes provided on the outer circumferential surface of the carrier. The identification device further comprises a second hole arranged on the outer peripheral surface of the planet carrier, wherein the first hole and the second hole have different shapes, hole diameters and/or numbers so that the feedback signal from the first hole and the feedback signal from the second hole detected by the distance sensor are different. For example, the number of the first holes at the calibration part corresponding to the planet wheel positions is two, and the first holes are sequentially arranged along the circumferential direction; and only one second hole is arranged at intervals (for example, every 15 degrees of central angle) at other positions of the outer peripheral surface of the planet carrier, which do not correspond to the planet wheels.
In order to monitor the displacement of the planetary system component, the distance sensor is also used for detecting the distance between the detection end and each point on the identification device. If the components of the planetary system are deformed (for example, the deformation of pin shafts of the planet wheels causes the position of the planet wheels to change), the distance detection of the distance sensor on the outer peripheral surface of the planet carrier can obtain the deformation of the planet carrier in the circumferential direction (for example, the change of the planet carrier after the operation for a period of time or the change reflected on the planet carrier due to the deformation of other components in the planetary system), so that the fault monitoring of the gearbox is implemented.
Although particular embodiments of the present invention have been described above, it will be appreciated by those skilled in the art that these are examples only and that the scope of the present invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and the principles of the present invention, and these changes and modifications are all within the scope of the present invention.
Claims (10)
1. A monitoring system for a gearbox, the gearbox comprising: comprising a planet carrier of an input flange, a moment arm, an end cover arranged on the moment arm and a plurality of planet wheels arranged in the planet carrier, wherein the revolution of each planet wheel and the rotation of the planet carrier are synchronous when the gear box works, and the device is characterized in that the monitoring system comprises a distance sensor and an identification device, wherein,
the identification device is circumferentially and fixedly arranged on the outer peripheral surface of the planet carrier close to the moment arm end cover, the identification device circumferentially comprises calibration parts the number of which is consistent with that of the planet wheels, and each calibration part circumferentially corresponds to the position of each planet wheel one by one;
the distance sensor is fixed in the moment arm end cover and extends in the radial direction of the moment arm end cover, the detection end of the distance sensor is close to the identification device in the radial direction, and the distance sensor is used for measuring the displacement of the calibration part and generating a feedback signal to determine the displacement of the planet carrier and the position of each planet wheel in the revolution circumferential direction.
2. The monitoring system of claim 1, wherein the identification device is a toothed belt disposed on an outer peripheral surface of the planet carrier, and the calibration portion is a first toothed portion protruding from the outer peripheral surface of the toothed belt.
3. The monitoring system of claim 2, further comprising a raised second tooth on the outer peripheral surface of the toothed belt, the first tooth and the second tooth having different shapes such that the feedback signal from the first tooth is different from the feedback signal from the second tooth.
4. The monitoring system of claim 3, wherein a height and/or width of the first tooth is different than a height and/or width of the second tooth.
5. The monitoring system of claim 1, wherein the calibration portion is a first recess portion provided on an outer peripheral surface of the carrier.
6. The monitoring system of claim 5, wherein the identification device further comprises a second recess disposed on the outer peripheral surface of the planet carrier, the first recess and the second recess having different shapes such that a feedback signal from the first recess is different from a feedback signal from the second recess.
7. A monitoring system according to claim 6, wherein the depth and/or width of the first recess is different to the depth and/or width of the second recess.
8. The monitoring system of claim 1, wherein the calibration portion is a plurality of first holes disposed on an outer peripheral surface of the planet carrier.
9. The monitoring system of claim 8, wherein the identification device further comprises a second hole disposed on the outer peripheral surface of the planet carrier, the first hole and the second hole having different shapes, diameters, and/or numbers such that the feedback signal from the first hole is different from the feedback signal from the second hole.
10. The monitoring system of any one of claims 1-9, wherein the distance sensor is further configured to detect a distance from the probe end to each point on the identification device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121133356.4U CN215296211U (en) | 2021-05-25 | 2021-05-25 | Monitoring system for gearbox |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121133356.4U CN215296211U (en) | 2021-05-25 | 2021-05-25 | Monitoring system for gearbox |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215296211U true CN215296211U (en) | 2021-12-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121133356.4U Active CN215296211U (en) | 2021-05-25 | 2021-05-25 | Monitoring system for gearbox |
Country Status (1)
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|---|---|
| CN (1) | CN215296211U (en) |
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2021
- 2021-05-25 CN CN202121133356.4U patent/CN215296211U/en active Active
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