CN110595654A - Online monitoring device for torque of output shaft of gear box - Google Patents
Online monitoring device for torque of output shaft of gear box Download PDFInfo
- Publication number
- CN110595654A CN110595654A CN201910984508.2A CN201910984508A CN110595654A CN 110595654 A CN110595654 A CN 110595654A CN 201910984508 A CN201910984508 A CN 201910984508A CN 110595654 A CN110595654 A CN 110595654A
- Authority
- CN
- China
- Prior art keywords
- output shaft
- gearbox
- monitoring device
- signal amplifier
- hole
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 238000012806 monitoring device Methods 0.000 title claims abstract description 20
- 230000005540 biological transmission Effects 0.000 claims abstract description 10
- 238000004891 communication Methods 0.000 claims abstract description 7
- 239000000565 sealant Substances 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims 1
- 239000011888 foil Substances 0.000 abstract description 5
- 239000003921 oil Substances 0.000 description 6
- 238000012544 monitoring process Methods 0.000 description 4
- 239000002699 waste material Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000010687 lubricating oil Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000008054 signal transmission Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L3/00—Measuring torque, work, mechanical power, or mechanical efficiency, in general
- G01L3/02—Rotary-transmission dynamometers
- G01L3/04—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft
- G01L3/10—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft involving electric or magnetic means for indicating
- G01L3/108—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft involving electric or magnetic means for indicating involving resistance strain gauges
-
- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The invention discloses an online monitoring device for the torque of an output shaft of a gear box, which belongs to the field of transmission and comprises a strain gauge, a signal amplifier, a signal receiver and a controller, wherein the strain gauge is arranged on the output shaft of the gear box; the signal receiver is arranged on the wheel hub and is arranged opposite to the signal amplifier, and the signal amplifier is in wireless communication connection with the signal receiver; the controller is electrically connected with the signal receiver. When the output shaft produces torsional deformation because of bearing the moment of torsion, the foil gage can gather the signal in real time and transmit to signal receiver through signal amplifier, further by signal receiver transmission to controller, and then can realize the real-time supervision to the moment that the output shaft received. The load of the gearbox can be monitored more accurately and timely, and the design of the gearbox is guided.
Description
Technical Field
The invention relates to the field of transmission, in particular to an online monitoring device for torque of an output shaft of a gear box.
Background
The gearbox is applied in many fields, and the yaw gearbox or the variable pitch gearbox used by the wind generating set has similar functions, and mostly transmits the torque of the motor to the yaw bearing or the variable pitch bearing, so that the engine room or the blades rotate around the rotation axis until the engine room or the blades reach the position required by a control system.
In a pitch gearbox, which is common today, as shown in fig. 1-3, a pitch bearing 10 is arranged between a blade 20 and a hub 30. An outer ring 101 of the variable pitch bearing 10 is fixedly connected with the hub 30 through bolts, and an inner ring 102 of the variable pitch bearing 10 is connected with the blade 20 through a stud. The casing 40 of the pitch gearbox is bolted to the hub 30 by means of a flange structure 50. The variable pitch gearbox is driven by a motor 60, the motor 60 drives an output shaft 70 to rotate through a transmission assembly in a driving box body 40, an output gear 80 arranged on the output shaft 70 is meshed with gear teeth arranged on an inner ring 102 of the variable pitch bearing 10, and then the inner ring 102 of the variable pitch bearing 10 is driven to rotate, so that the position of the blade 20 is freely adjusted.
The yaw gearbox or the pitch gearbox (in the case of no special indication, the gearbox is simply referred to as the gearbox hereinafter) has complex and changeable working conditions, is influenced by airflow, and has uncertainty on the actual load borne by the gearbox. The existing torque monitoring data are mostly from a control system of the motor, and the collected torque value is from the motor. The output shaft is used as the most direct bearing part in the yaw and pitch system, and due to factors such as the transmission efficiency of the gear box, the gap existing in an internal gear train and the like, the load acting on the output shaft, particularly the instantaneous fluctuation load, cannot be accurately measured, and the structural design of the yaw and pitch system (including the yaw and pitch gear box) is directly influenced, so that the cost and the reliability are influenced. Excessive surplus of design strength can lead to waste and bring cost increase, and insufficient bearing capacity is easy to cause structural failure if the design strength is too low.
Disclosure of Invention
The invention aims to provide an online monitoring device for the torque of an output shaft of a gearbox, which aims to solve the technical problem that the load on the output shaft cannot be accurately measured in the prior art.
As the conception, the technical scheme adopted by the invention is as follows:
an online monitoring device for torque of an output shaft of a gearbox comprises:
the strain gauge is arranged on an output shaft of the gear box;
the signal amplifier is arranged at the end part of the output shaft, and the signal amplifier is electrically connected with the strain gauge;
the signal receiver is arranged on the wheel hub and is opposite to the signal amplifier, and the signal amplifier is in wireless communication connection with the signal receiver;
and the controller is electrically connected with the signal receiver.
The signal amplifier is connected with the strain gauge through a wire, a threading hole is formed in the output shaft, and the wire penetrates through the threading hole.
Wherein, the threading hole is including first hole and the second hole of intercommunication each other, first hole is followed the axial setting of output shaft, first hole with contained angle between the second hole is the obtuse angle.
And a groove is arranged at one end of the output shaft, which is far away from the second hole, of the first hole, and the signal amplifier is embedded in the groove.
Wherein, be provided with the support in the recess, signal amplifier with support fixed connection.
And sealant is filled around the lead in the threading hole.
Wherein the signal amplifier is provided with a radio antenna, and the radio antenna is in wireless communication connection with the signal receiver.
Wherein, the signal receiver is electrically connected with the controller through a data transmission cable.
The gearbox comprises an end cover, the output shaft penetrates out of the end cover to be connected with the output gear, and the strain gauge is arranged on the outer surface of the output shaft and located on the inner side of the end cover.
And a framework oil seal is arranged between the end cover and the output shaft.
The invention has the beneficial effects that:
according to the gear box output shaft torque on-line monitoring device provided by the invention, the strain gauge is arranged on the output shaft of the gear box, when the output shaft generates torsional deformation due to bearing torque, the strain gauge can acquire signals in real time and transmit the signals to the signal receiver through the signal amplifier, and further the signals are transmitted to the controller through the signal receiver, so that the real-time monitoring of the torque borne by the output shaft can be realized. The signal amplifier is arranged at the end part of the output shaft by virtue of the connection relationship between the gear box and the hub, so as to be conveniently and electrically connected with the strain gauge arranged on the output shaft; the signal receiver is arranged on the hub and is right opposite to the signal amplifier, so that signal receiving is facilitated, the load of the gear box can be monitored more accurately and timely, the design of the gear box is guided, waste caused by excessive design strength is avoided, structural failure caused by insufficient bearing capacity can be avoided, and the wind turbine generator is more intelligent, and better in reliability and economy.
Drawings
FIG. 1 is a schematic illustration of a prior art pitch gearbox;
FIG. 2 is an enlarged view at A of FIG. 1;
FIG. 3 is a schematic diagram two of a prior art pitch gearbox;
FIG. 4 is a schematic diagram of an online torque monitoring device for an output shaft of a gearbox, provided by an embodiment of the invention;
fig. 5 is an enlarged view at B of fig. 4;
fig. 6 is an enlarged view at C of fig. 4.
In fig. 1-3:
10. a pitch bearing; 101. an outer ring; 102. an inner ring; 20. a blade; 30. a hub; 40. a box body; 50. a flange structure; 60. a motor; 70. an output shaft; 80. an output gear.
In fig. 4-6:
11. a strain gauge; 12. a signal amplifier; 13. a signal receiver; 14. a wire; 15. a support; 16. a data transmission cable;
21. an output shaft; 22. a hub; 23. threading holes; 231. a first hole; 232. a second hole; 24. an output gear; 25. and (5) framework oil seal.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
Referring to fig. 4 to 6, an embodiment of the present invention provides an online torque monitoring device for an output shaft of a gearbox, which is used for monitoring a torque applied to the output shaft 21. The online torque monitoring device for the output shaft of the gearbox comprises a strain gauge 11, a signal amplifier 12, a signal receiver 13 and a controller, wherein the strain gauge 11 is arranged on the output shaft 21 of the gearbox, the signal amplifier 12 is arranged at the end part of the output shaft 21, and the signal amplifier 12 is electrically connected with the strain gauge 11; the signal receiver 13 is arranged on the hub 22 and is opposite to the signal amplifier 12, and the signal amplifier 12 is in wireless communication connection with the signal receiver 13; the controller is electrically connected with the signal receiver 13.
Through setting up foil gage 11 on the output shaft 21 of gear box, when output shaft 21 produced torsional deformation because of bearing the moment of torsion, foil gage 11 can gather the signal in real time and transmit to signal receiver 13 through signal amplifier 12, further transmits to the controller by signal receiver 13, and then can realize the real-time supervision to the moment that output shaft 21 received.
The signal amplifier 12 is arranged at the end part of the output shaft 21 by virtue of the connection relationship between the gear box and the hub 22, so as to be electrically connected with the strain gauge 11 arranged on the output shaft 21; the signal receiver 13 is arranged on the hub 22 and is right opposite to the signal amplifier 12, so that signal receiving is facilitated, the load of the gear box can be monitored more accurately and timely, the design of the gear box is guided, waste caused by excessive design strength is avoided, structural failure caused by insufficient bearing capacity can be avoided, and the wind turbine generator is more intelligent, and better in reliability and economy.
The gear box includes the end cover, and output shaft 21 wears out the end cover and is connected with output gear 24, and foil gage 11 sets up on the surface of output shaft 21 and is located the inboard of end cover to protect foil gage 11.
The end cover is provided with a central hole, the output shaft 21 penetrates through the central hole, a bearing is sleeved on the output shaft 21 in the central hole, and the bearing plays a role in supporting the output shaft 21. In the central hole, a framework oil seal 25 is arranged between the end cover and the output shaft 21, and the framework oil seal 25 plays a role in sealing and dust prevention. In the present embodiment, the strain gauge 11 is located between the skeleton oil seal 25 and the bearing. By using the framework oil seal 25, the space where the strain gauge 11 is located is free from lubricating oil, so that the corrosion or the influence on the precision of the strain gauge 11 caused by the lubricating oil in the gear box is avoided.
The signal amplifier 12 is connected with the strain gauge 11 through a lead 14, a threading hole 23 is formed in the output shaft 21, and the lead 14 penetrates through the threading hole 23. The arrangement of the threading hole 23 fully utilizes the space on the output shaft 21 and prevents the problems of mistaken collision and winding caused by the exposed lead 14.
The thread hole 23 is filled with a sealant around the lead 14 to perform a sealing function, and to position the lead 14 to prevent frictional wear between the lead 14 and the inside of the output shaft 21.
In this embodiment, since the strain gauge 11 is disposed on the outer peripheral surface of the output shaft 21, the signal amplifier 12 is disposed at the end of the output shaft 21, the threading hole 23 includes a first hole 231 and a second hole 232 that are communicated with each other, the first hole 231 is disposed along the axial direction of the output shaft 21, and an included angle between the first hole 231 and the second hole 232 is an obtuse angle, so as to facilitate the threading of the lead 14. After the threading hole 23 is processed, burrs and sharp edges in the threading hole 23 are removed so as to avoid damaging the lead 14.
A groove is formed in the output shaft 21 at an end of the first hole 231 remote from the second hole 232, and the signal amplifier 12 is embedded in the groove. The arrangement of the groove fully utilizes the space on the output shaft 21, and plays a role in protecting the signal amplifier 12. In order to position the signal amplifier 12, a support 15 is arranged in the groove, and the signal amplifier 12 is fixedly connected with the support 15.
The signal amplifier 12 has a radio antenna, which is connected to the signal receiver 13 in a wireless communication manner. The signal amplifier 12 is arranged on the output shaft 21, the signal receiver 13 is arranged on the wheel hub 22, and the signal amplifier 12 and the signal receiver 13 are arranged at intervals, so that the signal of the signal amplifier 12 can be transmitted to the signal receiver 13 due to the radio antenna. In order to ensure smooth signal transmission and reception, the axis of the signal amplifier 12 and the axis of the signal receiver 13 are both coincident with the axis of the output shaft 21.
The signal receiver 13 is electrically connected with the controller through a data transmission cable 16. The signal receiver 13 transmits the received signal to the controller via a data transmission cable 16, and the controller can show the monitored data on a display screen to realize visual monitoring of the torque.
The principle of signal transmission between the transformer 11, the signal amplifier 12, the signal receiver 13 and the controller is not described in detail herein, and reference may be made to the prior art.
The foregoing embodiments are merely illustrative of the principles and features of this invention, which is not limited to the above-described embodiments, but rather is susceptible to various changes and modifications without departing from the spirit and scope of the invention, which changes and modifications are within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. The utility model provides a gear box output shaft moment on-line monitoring device which characterized in that includes:
a strain gauge (11) provided on an output shaft (21) of the gear case;
a signal amplifier (12) arranged at the end part of the output shaft (21), wherein the signal amplifier (12) is electrically connected with the strain gauge (11);
the signal receiver (13) is arranged on the hub (22) and is arranged opposite to the signal amplifier (12), and the signal amplifier (12) is in wireless communication connection with the signal receiver (13);
a controller electrically connected with the signal receiver (13).
2. The online torque monitoring device for the output shaft of the gearbox as claimed in claim 1, wherein the signal amplifier (12) is connected with the strain gauge (11) through a lead (14), the output shaft (21) is provided with a threading hole (23), and the lead (14) is arranged in the threading hole (23) in a penetrating manner.
3. The online torque monitoring device for the output shaft of the gearbox as recited in claim 2, wherein the threading hole (23) comprises a first hole (231) and a second hole (232) which are communicated with each other, the first hole (231) is arranged along the axial direction of the output shaft (21), and the included angle between the first hole (231) and the second hole (232) is an obtuse angle.
4. Gearbox output shaft torque on-line monitoring device according to claim 3, characterized in that a groove is arranged on the output shaft (21) at the end of the first hole (231) far away from the second hole (232), and the signal amplifier (12) is embedded in the groove.
5. The online torque monitoring device for the output shaft of the gearbox is characterized in that a support (15) is arranged in the groove, and the signal amplifier (12) is fixedly connected with the support (15).
6. The online torque monitoring device for the output shaft of the gearbox as claimed in claim 2, wherein the threading hole (23) is filled with sealant around the lead (14).
7. Gearbox output shaft torque on-line monitoring device according to claim 1, characterized in that the signal amplifier (12) has a radio antenna, which is in wireless communication connection with the signal receiver (13).
8. Gearbox output shaft torque on-line monitoring device according to claim 1, characterized in that the signal receiver (13) is electrically connected with the controller through a data transmission cable (16).
9. A gearbox output shaft torque on-line monitoring device according to any one of claims 1-8, characterized in that the gearbox comprises an end cover, the output shaft (21) passes through the end cover to be connected with an output gear (24), and the strain gauge (11) is arranged on the outer surface of the output shaft (21) and is positioned on the inner side of the end cover.
10. Gearbox output shaft torque on-line monitoring device according to claim 9, characterized in that a skeleton oil seal (25) is arranged between the end cover and the output shaft (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910984508.2A CN110595654A (en) | 2019-10-16 | 2019-10-16 | Online monitoring device for torque of output shaft of gear box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910984508.2A CN110595654A (en) | 2019-10-16 | 2019-10-16 | Online monitoring device for torque of output shaft of gear box |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110595654A true CN110595654A (en) | 2019-12-20 |
Family
ID=68867652
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910984508.2A Withdrawn CN110595654A (en) | 2019-10-16 | 2019-10-16 | Online monitoring device for torque of output shaft of gear box |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110595654A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112577649A (en) * | 2020-12-09 | 2021-03-30 | 中国船舶重工集团海装风电股份有限公司 | Wind power gearbox bearing stress testing method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104655347A (en) * | 2013-11-21 | 2015-05-27 | 四川观想电子科技有限公司 | Digital display type multiplier wrench measuring system |
| CN105865681A (en) * | 2016-03-18 | 2016-08-17 | 南京波思途电子科技有限公司 | Power online monitoring system of rotation output equipment |
| CN106685116A (en) * | 2017-01-22 | 2017-05-17 | 北京理工大学 | Direct-drive motor device |
| CN206387523U (en) * | 2017-01-25 | 2017-08-08 | 广西玉柴机器股份有限公司 | The torque-measuring apparatus of engine cam |
| WO2018234442A1 (en) * | 2017-06-21 | 2018-12-27 | Wobben Properties Gmbh | Output unit of a pitch drive and/or of a yaw drive of a wind turbine, and method |
| CN110254793A (en) * | 2019-07-26 | 2019-09-20 | 中国科学院重庆绿色智能技术研究院 | A kind of online torque monitoring of cigarette unit and control system |
| CN210322110U (en) * | 2019-10-16 | 2020-04-14 | 南京高速齿轮制造有限公司 | Online monitoring device for torque of output shaft of gear box |
-
2019
- 2019-10-16 CN CN201910984508.2A patent/CN110595654A/en not_active Withdrawn
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104655347A (en) * | 2013-11-21 | 2015-05-27 | 四川观想电子科技有限公司 | Digital display type multiplier wrench measuring system |
| CN105865681A (en) * | 2016-03-18 | 2016-08-17 | 南京波思途电子科技有限公司 | Power online monitoring system of rotation output equipment |
| CN106685116A (en) * | 2017-01-22 | 2017-05-17 | 北京理工大学 | Direct-drive motor device |
| CN206387523U (en) * | 2017-01-25 | 2017-08-08 | 广西玉柴机器股份有限公司 | The torque-measuring apparatus of engine cam |
| WO2018234442A1 (en) * | 2017-06-21 | 2018-12-27 | Wobben Properties Gmbh | Output unit of a pitch drive and/or of a yaw drive of a wind turbine, and method |
| CN110254793A (en) * | 2019-07-26 | 2019-09-20 | 中国科学院重庆绿色智能技术研究院 | A kind of online torque monitoring of cigarette unit and control system |
| CN210322110U (en) * | 2019-10-16 | 2020-04-14 | 南京高速齿轮制造有限公司 | Online monitoring device for torque of output shaft of gear box |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112577649A (en) * | 2020-12-09 | 2021-03-30 | 中国船舶重工集团海装风电股份有限公司 | Wind power gearbox bearing stress testing method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20200508 Address after: 211100 No. 30 Houjiao Road, High-tech Park, Jiangning District, Nanjing City, Jiangsu Province Applicant after: NANJING HIGH SPEED GEAR MANUFACTURING Co.,Ltd. Address before: 211100 No. 30 Houjiao Road, High-tech Park, Jiangning District, Nanjing City, Jiangsu Province Applicant before: NANJING HIGH SPEED GEAR MANUFACTURING Co.,Ltd. Applicant before: Nanjing High Precision Transmission Equipment Manufacturing Group Co.,Ltd. |
|
| TA01 | Transfer of patent application right | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20191220 |