CN108387331B - Method for testing real-time dynamic stress of disc type pull rod combined rotor - Google Patents
Method for testing real-time dynamic stress of disc type pull rod combined rotor Download PDFInfo
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- CN108387331B CN108387331B CN201810099011.8A CN201810099011A CN108387331B CN 108387331 B CN108387331 B CN 108387331B CN 201810099011 A CN201810099011 A CN 201810099011A CN 108387331 B CN108387331 B CN 108387331B
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- 238000012360 testing method Methods 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000012544 monitoring process Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/20—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress
- G01L1/22—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress using resistance strain gauges
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a method for testing real-time dynamic stress of a disc type pull rod combination type rotor, which utilizes a conductive slip ring, a resistance strain gauge and a data acquisition system to carry out real-time dynamic stress test on a rotor, a pull rod and a wheel disc of the disc type pull rod combination type rotor system in an actual working state. The invention is suitable for the field of stress test of rotating machinery, in particular to the test of real-time stress of a combined rotor system with a closed structure.
Description
Technical Field
The invention belongs to the technical field of rotating machinery testing, and particularly relates to a method for testing real-time dynamic stress of a disc type pull rod combination type rotor.
Background
The rotor system in the rotary mechanical system is the core power unit of the power machine, is often in a high-speed and heavy-load working state, the actual stress condition is complex and variable, the performance of the rotor of the key structure of the power part directly influences the service life of the rotor, the real-time monitoring of the stress strain of the disc type pull rod combination type rotor system is mainly based on static test, the real-time testing of the stress strain of the rotor structure of the rotary machine under the actual working condition under the rotation condition is not well solved, for the open type combined rotor structure, the stress test by using the wireless test scheme is an effective method, for the combined rotor structure with a closed structure, most of the combined rotor structure is made of metal materials, when the dynamic stress on the surface of an internal part needs to be tested, the wireless test signal can hardly reflect the stress strain of the component under the actual working state due to the shielding effect of the metal material.
Disclosure of Invention
The invention aims to provide a method for testing real-time dynamic stress of a disc type pull rod combination type rotor, so as to solve the problems.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method for testing real-time dynamic stress of a disc type pull rod combination type rotor comprises the steps that the disc type pull rod combination type rotor comprises a rotor, a pull rod, a left disc, a middle disc and a right disc; a rotor is vertically arranged in the center of one surface of the left disc, a rotor is vertically arranged in the center of one surface of the right disc, the surfaces of the left disc and the right disc, which are not provided with the rotors, are oppositely arranged, the middle disc is arranged between the left disc and the right disc, and the left disc, the middle disc and the right disc are concentrically arranged; pull rod holes are formed in the left disc, the middle disc and the right disc, and the pull rods sequentially penetrate through the pull rod holes to connect the three discs;
the method for testing the real-time dynamic stress of the disc type pull rod combined rotor comprises the following steps:
step 1: determining the parts of the combined disc type pull rod rotor system which are easy to generate surface fatigue cracks and stress concentration, and pasting a resistance strain gauge;
step 2: installing a conductive slip ring at the end part of the rotor;
and step 3: connecting a lead of the resistance strain gauge to an output line end of the conductive slip ring rotor;
and 4, step 4: connecting an information acquisition end of a data acquisition system with an output line end of a conductive slip ring stator;
and 5: calibrating and debugging the state of the resistance strain gauge;
step 6: starting a data acquisition system and a conductive slip ring power supply;
and 7: the rotor system is started to rotate, an external power supply supplies power to the resistance strain gauge and the data acquisition system through the conductive slip ring, meanwhile, the resistance strain gauge transmits surface stress information acquired to the corresponding measuring point position to the data acquisition system through the conductive slip ring in real time, the data acquisition system is connected to the PC industrial personal computer, and the data acquisition system monitors stress change conditions of the corresponding testing point position through the PC industrial personal computer in real time.
Further, the conductive slip ring comprises a conductive slip ring rotor and a conductive slip ring stator; the conductive slip ring rotor is fixedly sleeved on the rotor, and the conductive slip ring stator is sleeved on the outer side of the conductive slip ring rotor and is fixed.
Furthermore, a pull rod nut is arranged at the end part of the pull rod.
Furthermore, both ends of the rotor are provided with supporting bearings, and the supporting bearings are sleeved at the end parts of the rotor.
Furthermore, annular boss contact surfaces are arranged between the left disc and the middle disc and between the middle disc and the right disc.
Furthermore, the linear distance between the center point of the conductive slip ring and the center point of the end face of the support bearing is 0.03 cm-2 cm.
Compared with the prior art, the invention has the following technical effects:
the invention can carry out long-term monitoring on the dynamic stress of the position to be tested of the inner cavity of the metal rotor system with the closed structure under the working state; the dynamic stress test and monitoring can be carried out on the local surface position of the disc type pull rod combined rotor system, which is easy to generate fatigue cracks, in real time; the inaccuracy caused by shielding or signal strength reduction in signal transmission due to a closed cavity structure in a wireless dynamic stress-strain test scheme is overcome; meanwhile, the problem that a stress strain acquisition sensor needs to provide a battery, the battery is inconvenient to install and limited in capacity, the structural characteristics of the battery have certain influence on the dynamic characteristics of the rotor, and long-term monitoring in an actual working state is difficult to realize compared with a wireless stress strain testing method is solved.
The conductive slip ring device has simple structure and easy installation, and can well solve the problem that the rotating part cannot be tested due to the winding generated by the arrangement of the sensors: according to the structure of the actual combined rotor, the conductive slip ring with the corresponding specification and even a miniature precise conductive slip ring structure can be flexibly configured.
Drawings
FIG. 1 is a schematic structural view of the present invention;
wherein: 1. a support bearing; 2. a rotor; 3. a pull rod; 41. a left disc; 42. a middle disc; 43. a right disc; 5. a resistance strain gauge lead; 6. a resistance strain gauge; 7. a data acquisition system; 8. a conductive slip ring stator output line; 9. a conductive slip ring stator; 10. a conductive slip ring rotor; 11. a conductive slip ring rotor output line; 12. a PC industrial personal computer; 13. a draw rod nut.
Detailed Description
The invention is further described below with reference to the accompanying drawings:
referring to fig. 1 of the drawings, a drawing,
a method for testing real-time dynamic stress of a disc type pull rod combination rotor comprises the steps that the disc type pull rod combination rotor comprises a rotor 2, a pull rod 3, a left disc 41, a middle disc 42 and a right disc 43; the center of one surface of the left disc 41 is vertically provided with the rotor 2, the center of one surface of the right disc 43 is vertically provided with the rotor 2, the left disc 41 and the right disc 43 are oppositely arranged without the rotor 2, the middle disc 42 is arranged between the left disc 41 and the right disc 43, and the left disc 41, the middle disc 42 and the right disc 43 are concentrically arranged; pull rod holes are formed in the left disc 41, the middle disc 42 and the right disc 43, and the pull rod 3 sequentially penetrates through the pull rod holes to connect the three discs;
the method for testing the real-time dynamic stress of the disc type pull rod combined rotor comprises the following steps:
step 1: determining the parts of the combined disc type pull rod rotor system which are easy to generate surface fatigue cracks and stress concentration, and pasting a resistance strain gauge 6;
step 2: a conductive slip ring is arranged at the end part of the rotor 2;
and step 3: connecting the resistance strain gauge lead 5 to the output terminal 11 of the conductive slip ring rotor;
and 4, step 4: connecting an information acquisition end of a data acquisition system 7 with an output line end 8 of a conductive slip ring stator;
and 5: calibrating and debugging the state of the resistance strain gauge 6;
step 6: starting a data acquisition system and a conductive slip ring power supply;
and 7: the rotor system is started to rotate, an external power supply supplies power to the resistance strain gauge 6 and the data acquisition system 7 through the conductive slip ring, meanwhile, the resistance strain gauge 6 transmits surface stress information acquired to the corresponding measuring point position to the data acquisition system 7 through the conductive slip ring in real time, the data acquisition system 7 is connected to the PC industrial personal computer 12, and the data acquisition system 7 monitors stress change conditions of the corresponding testing point position through the PC industrial personal computer 12 in real time.
The conductive slip ring comprises a conductive slip ring rotor 10 and a conductive slip ring stator 9; the conductive slip ring rotor 10 is fixedly sleeved on the rotor 2, and the conductive slip ring stator 9 is sleeved on the outer side of the conductive slip ring rotor 10 and fixes the conductive slip ring stator 9.
The end of the draw rod 3 is provided with a draw rod nut 13.
Both ends of rotor 2 all are provided with support bearing 1, and support bearing 1 cover is established at the tip of rotor 2.
Annular boss contact surfaces are provided between the left disc 41 and the middle disc 42, and between the middle disc 42 and the right disc 43.
The linear distance between the central point of the conductive slip ring and the central point of the end surface of the support bearing 1 is 0.03 cm-2 cm.
According to the position to be tested actually, such as the position of adhering the resistance strain gauge 6 in fig. 1, the arrangement of the resistance strain gauge 6 is generally carried out for the position with concentrated surface stress or easy generation of fatigue crack or peeling, the clean testing position is ensured, no oil stain, no rust and other impurity coatings are generated, the strain gauge is crosswise adhered to the testing point position at an angle of 45 degrees or 135 degrees with the axis, and a temperature compensation sheet is arranged;
and installing a conductive slip ring at the position of the combined rotor shaft close to the support bearing, and particularly enabling the distance between the central point position of the conductive slip ring 10 and the central position of the end surface of the support bearing 1 to be 0.03 cm-2 cm so as to reduce the influence of the conductive slip ring 10 on the dynamic performance of the combined rotor system and enable the obtained stress strain information of the measuring point position to be close to the actual maximum degree. The conducting slip ring stator 9 is fixed.
And connecting the resistance strain gauge lead 5 to a rotor output line end 11 of the conductive slip ring, and connecting a signal line of the data acquisition system 7 with a stator output line 8 of the conductive slip ring.
After the state calibration is carried out on the resistance strain gauge 6 and the debugging is finished, a power supply of the conducting ring and the data acquisition system 7 is started, then the rotor is made to rotate, the power supply is provided for the resistance strain gauge 6 through the conducting slip ring, meanwhile, the resistance strain gauge 6 transmits the surface stress acquired to the corresponding part to the data acquisition system 7 through the conducting slip ring in real time, the data acquisition system 7 can monitor the stress change condition of the corresponding test point in real time through the PC industrial personal computer 12, and then a test point stress change curve graph at any moment under the working state is acquired.
Claims (5)
1. The method for testing the real-time dynamic stress of the disc type pull rod combination rotor is characterized in that the disc type pull rod combination rotor comprises a rotor (2), a pull rod (3), a left disc (41), a middle disc (42) and a right disc (43); the center of one surface of the left disc (41) is vertically provided with the rotor (2), the center of one surface of the right disc (43) is vertically provided with the rotor (2), the surfaces, which are not provided with the rotor (2), of the left disc (41) and the right disc (43) are oppositely arranged, the middle disc (42) is arranged between the left disc (41) and the right disc (43), and the left disc (41), the middle disc (42) and the right disc (43) are concentrically arranged; pull rod holes are formed in the left disc (41), the middle disc (42) and the right disc (43), and the pull rods (3) sequentially penetrate through the pull rod holes to connect the three discs;
the method for testing the real-time dynamic stress of the disc type pull rod combined rotor comprises the following steps:
step 1: determining the parts of the combined disc type pull rod rotor system which are easy to generate surface fatigue cracks and stress concentration, and pasting a resistance strain gauge (6);
step 2: a conductive slip ring is arranged at the end part of the rotor (2);
and step 3: connecting a resistance strain gauge lead (5) to an output terminal (11) of the conductive slip ring rotor;
and 4, step 4: connecting an information acquisition end of a data acquisition system (7) with an output line end (8) of a conductive slip ring stator;
and 5: carrying out state calibration and debugging on the resistance strain gauge (6);
step 6: starting a data acquisition system and a conductive slip ring power supply;
and 7: the rotor system is started to rotate, an external power supply supplies power to the resistance strain gauge (6) and the data acquisition system (7) through the conductive slip ring, meanwhile, the resistance strain gauge (6) transmits surface stress information acquired to a corresponding measuring point part to the data acquisition system (7) in real time through the conductive slip ring, the data acquisition system (7) is connected to the PC industrial personal computer (12), and the data acquisition system (7) monitors the stress change condition of a corresponding measuring point in real time through the PC industrial personal computer (12);
annular boss contact surfaces are arranged between the left disc (41) and the middle disc (42) and between the middle disc (42) and the right disc (43).
2. The method for testing the real-time dynamic stress of the disc type pull rod combination rotor as claimed in claim 1, wherein the conductive slip ring comprises a conductive slip ring rotor (10) and a conductive slip ring stator (9); the conductive slip ring rotor (10) is fixedly sleeved on the rotor (2), and the conductive slip ring stator (9) is sleeved on the outer side of the conductive slip ring rotor (10) and is fixed with the conductive slip ring stator (9).
3. The method for testing the real-time dynamic stress of the disc type pull rod combination rotor as claimed in claim 1, wherein a pull rod nut (13) is arranged at the end of the pull rod (3).
4. The method for testing the real-time dynamic stress of the disc type pull rod combination rotor according to claim 1, wherein two ends of the rotor (2) are respectively provided with a support bearing (1), and the support bearings (1) are sleeved at the end parts of the rotor (2).
5. The method for testing the real-time dynamic stress of the disc type pull rod combination rotor as claimed in claim 4, wherein the linear distance from the central point of the conductive slip ring to the central point of the end face of the support bearing (1) is 0.03cm to 2 cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810099011.8A CN108387331B (en) | 2018-01-31 | 2018-01-31 | Method for testing real-time dynamic stress of disc type pull rod combined rotor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810099011.8A CN108387331B (en) | 2018-01-31 | 2018-01-31 | Method for testing real-time dynamic stress of disc type pull rod combined rotor |
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| CN108387331A CN108387331A (en) | 2018-08-10 |
| CN108387331B true CN108387331B (en) | 2020-07-28 |
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| CN201810099011.8A Expired - Fee Related CN108387331B (en) | 2018-01-31 | 2018-01-31 | Method for testing real-time dynamic stress of disc type pull rod combined rotor |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109781562B (en) * | 2019-01-25 | 2020-08-18 | 西安交通大学 | Method and test bed for measuring fretting friction wear of connection interface of combined rotor disc |
| CN113155014A (en) * | 2021-03-15 | 2021-07-23 | 清华大学 | Circumferential pull rod rotor pull rod dynamic strain measurement system |
| CN113654701B (en) * | 2021-08-24 | 2023-07-25 | 中国航发湖南动力机械研究所 | Dynamic stress measuring device for aero-engine rotor blade and application thereof |
| CN114577461A (en) * | 2022-03-22 | 2022-06-03 | 浙江吉利控股集团有限公司 | Detection system for residual life of steering pull rod and automobile |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4042270C1 (en) * | 1990-12-31 | 1992-04-23 | Dr. Staiger, Mohilo + Co Gmbh, 7060 Schorndorf, De | Torque pick=up using expansion measuring strips in bridge circuit - establishes coupling between rotor and housing by slip-rings and brushes on sprung retainers |
| JP2004177376A (en) * | 2002-11-29 | 2004-06-24 | Mitsuboshi Belting Ltd | Connecting method of strain gauge |
| CN1696630A (en) * | 2004-12-27 | 2005-11-16 | 西北工业大学 | Method and equipment for measuring torsional vibration of rotating mechanical rotor |
| CN103162922A (en) * | 2011-12-12 | 2013-06-19 | 西安真核医疗科技有限公司 | Switching-on system of rotary workpiece platform |
| CN104525314A (en) * | 2014-10-11 | 2015-04-22 | 内蒙古科技大学 | Test method for gas-solid two-phase flow field characteristics in crushing chamber of crusher |
| CN105136363A (en) * | 2015-09-08 | 2015-12-09 | 深圳国泰安教育技术股份有限公司 | Dynamic torque measuring device |
-
2018
- 2018-01-31 CN CN201810099011.8A patent/CN108387331B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4042270C1 (en) * | 1990-12-31 | 1992-04-23 | Dr. Staiger, Mohilo + Co Gmbh, 7060 Schorndorf, De | Torque pick=up using expansion measuring strips in bridge circuit - establishes coupling between rotor and housing by slip-rings and brushes on sprung retainers |
| JP2004177376A (en) * | 2002-11-29 | 2004-06-24 | Mitsuboshi Belting Ltd | Connecting method of strain gauge |
| CN1696630A (en) * | 2004-12-27 | 2005-11-16 | 西北工业大学 | Method and equipment for measuring torsional vibration of rotating mechanical rotor |
| CN103162922A (en) * | 2011-12-12 | 2013-06-19 | 西安真核医疗科技有限公司 | Switching-on system of rotary workpiece platform |
| CN104525314A (en) * | 2014-10-11 | 2015-04-22 | 内蒙古科技大学 | Test method for gas-solid two-phase flow field characteristics in crushing chamber of crusher |
| CN105136363A (en) * | 2015-09-08 | 2015-12-09 | 深圳国泰安教育技术股份有限公司 | Dynamic torque measuring device |
Non-Patent Citations (1)
| Title |
|---|
| Nonlinear dynamic characteristics of a three-dimensional rod-fastening rotor bearing system;Yi Liu et al;《Proc IMechE Part C: J Mechanical 》;20140618;参见第1节图1（a） * |
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