CN110631828A - Testing device and testing method for power split gear transmission system - Google Patents
Testing device and testing method for power split gear transmission system Download PDFInfo
- Publication number
- CN110631828A CN110631828A CN201911024241.9A CN201911024241A CN110631828A CN 110631828 A CN110631828 A CN 110631828A CN 201911024241 A CN201911024241 A CN 201911024241A CN 110631828 A CN110631828 A CN 110631828A
- Authority
- CN
- China
- Prior art keywords
- gear
- transmission system
- gear transmission
- shaft
- acceleration
- 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.)
- Pending
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
- G01M13/02—Gearings; Transmission mechanisms
- G01M13/021—Gearings
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
- G01M13/02—Gearings; Transmission mechanisms
- G01M13/025—Test-benches with rotational drive means and loading means; Load or drive simulation
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
- G01M13/02—Gearings; Transmission mechanisms
- G01M13/028—Acoustic or vibration analysis
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The invention discloses a testing device and a testing method of a power split gear transmission system, which comprises a gear transmission system, wherein the input end of the gear transmission system is connected with a rotating speed torque sensor through a first coupler, the rotating speed torque sensor is connected with a motor through a second coupler, and the output end of the gear transmission system is connected with a magnetic powder brake through a third coupler; an acceleration sensor is arranged on the gear transmission system. The acceleration sensor is arranged on the bearing end cover close to one side of the gear, the running conditions of the gear transmission system under various working conditions are simulated through parameter combinations of different motor rotating speeds and load torques, the vibration acceleration of each gear under different working conditions is obtained through the acceleration sensor, so that the vibration signal of the gear transmission system is accurately and quickly obtained, and the dynamic characteristics of the gear transmission system are verified.
Description
Technical Field
The invention belongs to the technical field of mechanical dynamics test devices, relates to a test device of a power split gear transmission system, and further relates to a test method of the power split gear transmission system.
Background
The gear transmission system is one of the most important forms in a mechanical transmission system, has the advantages of simple structure, stable operation, high transmission efficiency and the like, and is widely applied to the fields of aerospace, wind power generation, modern ships and the like.
Modern equipment puts higher requirements on the volume, the transmission efficiency and the reliability of a gear transmission system, so that theoretical research on gear design and performance improvement is continuously and deeply promoted, and tests and performance tests of the gear transmission system have guiding significance on the gear design and performance improvement.
The vibration is a common phenomenon when a gear transmission system works, a vibration signal quickly, truly and comprehensively responds to the running state of equipment, most gear faults can be well reflected, and the vibration signal is known as a good symptom extraction amount. Therefore, vibration diagnosis and analysis play an important role in testing a gear transmission system, and the existing vibration diagnosis and analysis device and method comprise a plurality of types, but the current vibration diagnosis and analysis device can test the dynamic characteristics of a conventional gear transmission system and is difficult to test the dynamic characteristics of a power-split gear transmission configuration.
Disclosure of Invention
The invention aims to provide a testing device of a power splitting gear transmission system, which solves the problem that the dynamic characteristic test of a power splitting gear transmission configuration is difficult to carry out in the prior art.
The technical scheme adopted by the invention is that the testing device of the power dividing gear transmission system comprises a gear transmission system, wherein the input end of the gear transmission system is connected with a rotating speed and torque sensor through a first coupler, the rotating speed and torque sensor is connected with a motor through a second coupler, and the output end of the gear transmission system is connected with a magnetic powder brake through a third coupler; an acceleration sensor is arranged on the gear transmission system.
The invention is also characterized in that:
gear drive system includes the box, be provided with the input shaft in the box, be connected with gear A on the input shaft, the input shaft is kept away from gear A one end and is stretched out box and first coupling joint, still including transmission shaft A and transmission shaft B, gear B has connected gradually on the transmission shaft A, gear C, gear D has connected gradually on the transmission shaft B, gear E, gear A respectively with gear B, gear D meshes, still including the output shaft, be connected with gear F on the output shaft, gear F respectively with gear C, gear E meshes, the output shaft is kept away from gear F one end and is stretched out the box and be connected with the third coupling joint.
The two ends of the input shaft, the transmission shaft A, the transmission shaft B and the output shaft are respectively fixed on the side wall of the box body through bearings.
The acceleration sensor includes a plurality ofly, and a plurality of acceleration sensors are installed respectively on the bearing end cover of input shaft, transmission shaft A, transmission shaft B and output shaft.
The magnetic powder brake device is characterized by further comprising a frequency converter and a manual tension controller, wherein the frequency converter is connected with the motor, and the manual tension controller is connected with the magnetic powder brake.
It is another object of the present invention to provide a method of testing a power split gear transmission system.
The invention adopts another technical scheme that a testing method of a power split gear transmission system comprises the following steps:
step 2, opening a cooling system of the magnetic powder brake, and adjusting the flow of cooling water;
step 3, turning on a rotating speed torque sensor, a motor, a gear transmission system and an acceleration sensor;
and 4, controlling the current of the magnetic powder brake to adjust the load torque through a manual tension controller, adjusting the rotating speed of the motor through a frequency converter, and testing the gear acceleration under different parameter combinations of the rotating speed and the load torque of the motor.
The invention has the beneficial effects that:
according to the testing device of the power dividing gear transmission system, the acceleration sensor is arranged on the bearing end cover close to one side of the gear, so that the acceleration sensor and the meshing point on the side walls of the two meshed gear bearing end covers are positioned on the same straight line, and the problem that the acceleration sensor cannot be arranged at the meshing point when the gear normally runs can be solved; the running conditions of the gear transmission system under various working conditions are simulated through parameter combinations of different motor rotating speeds and load torques, and the vibration acceleration of each gear under different working conditions is obtained through an acceleration sensor, so that the vibration signal of the gear transmission system is accurately and quickly obtained, and the dynamic characteristics of the gear transmission system are verified; the testing method of the power split gear transmission system has the advantages of good stability, simplicity in operation and high testing precision, and can meet the requirements of vibration tests of the power split gear transmission system under various working conditions.
Drawings
FIG. 1 is a schematic structural diagram of a testing apparatus for a power splitting gear transmission system of the present invention;
FIG. 2 is a schematic diagram of a gear system configuration of a power splitting gear system testing apparatus of the present invention;
FIG. 3 is a profile of an acceleration sensor for a torque stage gear in a test setup for a power split gear drive system of the present invention;
FIG. 4 is a distribution diagram of acceleration sensors of a parallel stage gear in a testing apparatus of a power split gear transmission system of the present invention.
In the figure, 1, a first coupler, 2, a rotating speed and torque sensor, 3, a second coupler, 4, a motor, 5, a third coupler, 6, a magnetic powder brake, 7, an acceleration sensor, 7-1, an acceleration sensor A, 7-2, an acceleration sensor B, 7-3, an acceleration sensor C, 7-4, an acceleration sensor D, 7-5, an acceleration sensor E, 7-6, an acceleration sensor F, 8, a box body, 9, an input shaft, 10, a gear A, 11, a transmission shaft A, 12, a gear B, 13, a gear C, 14, a gear D, 15, a gear E, 16, an output shaft, 17, a gear F, 18, a bearing A, 19, a bearing B, 20, a bearing C, 21, a bearing D, 22, a bearing E, 23, a bearing F, 24, a bearing G, 25, a bearing H, 26, a transmission shaft B, 27. frequency converter, 28 manual tension controller, 29 signal acquisition amplifier, 30 computer, 31 cooling water source.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
A testing device of a power splitting gear transmission system is shown in figure 1 and comprises a gear transmission system, wherein the input end of the gear transmission system is connected with a rotating speed and torque sensor 2 through a first coupler 1, the rotating speed and torque sensor 2 is connected with a motor 4 through a second coupler 3, the output end of the gear transmission system is connected with a magnetic powder brake 6 through a third coupler 5, and the magnetic powder brake 6 is connected with a cooling water source 31; the gear transmission system is provided with an acceleration sensor 7 and further comprises a computer 30, and the rotating speed torque sensor 2, the magnetic powder brake 6 and the acceleration sensor 7 are all connected with the computer 30 through signal lines.
As shown in fig. 2, the gear transmission system includes a box 8, an input shaft 9 is arranged in the box 8, a gear a10 is connected to the input shaft 9, one end of the input shaft 9, which is far away from the gear a10, extends out of the box 8 and is connected with the first coupling 1, the gear transmission system further includes a transmission shaft a11 and a transmission shaft B26, a gear B12 and a gear C13 are sequentially connected to the transmission shaft a11, a gear D14 and a gear E15 are sequentially connected to the transmission shaft B26, the gear a10 is respectively engaged with the gear B12 and the gear D14, the gear a10 is an input gear, the gear B12 and the gear D14 are torque-dividing gears, the gear transmission system further includes an output shaft 16, a gear F17 is connected to the output shaft 16, the gear F17 is respectively engaged with the gear C13 and the gear E15, one end of the output shaft 16, which is far away from the gear F17, extends out of the box 8 and is connected with.
The input shaft 9, the transmission shaft A11, the transmission shaft B26 and the output shaft 16 are fixed at two ends on the side wall of the box body 8 through bearings respectively.
Specifically, one end of the input shaft 9, which is close to the gear a10, is fixed on the side wall of the box body 8 through a bearing a18, and the other end is fixed on the side wall of the box body 8 through a bearing B19; one end of the transmission shaft A11, which is close to the gear B12, is fixed on the side wall of the box body 8 through a bearing C20, and the other end is fixed on the side wall of the box body 8 through a bearing D21; one end of the transmission shaft B26, which is close to the gear D14, is fixed on the side wall of the box body 8 through a bearing E22, and the other end is fixed on the side wall of the box body 8 through a bearing F23; the output shaft 16 is fixed to the side wall of the box 8 through a bearing G24 at one end close to the gear F17, and is fixed to the side wall of the box 8 through a bearing H25 at the other end.
The acceleration sensors 7 comprise a plurality of acceleration sensors, since the vibration source of the transmission system comes from the meshing of the gears, the acceleration sensors cannot be arranged at the meshing points when the gears normally run, and in order to obtain real and effective vibration data, the acceleration sensors 7 are respectively arranged on the bearing end covers of the input shaft 9, the transmission shaft A11, the transmission shaft B26 and the output shaft 16.
Specifically, the acceleration sensors 7 are respectively connected to end cover side walls of a bearing a18, a bearing C20, a bearing D21, a bearing E22, a bearing F23 and a bearing G24 through magnetic holders, and the acceleration sensors 7 on the end cover side walls of two engaged gear bearings and an engagement point are located on the same straight line.
The magnetic powder brake device further comprises a frequency converter 27 and a manual tension controller 28, wherein the frequency converter 27 is connected with the motor 4 through a three-phase four-wire cable, and the manual tension controller 28 is connected with the magnetic powder brake 6.
A method of testing a power-split gear drive system, comprising the steps of:
specifically, two acceleration sensors a7-1 are installed on the side wall of an end cover of a bearing a18 and are marked as a test point 1 and a test point 2, acceleration sensors B7-2 (marked as a test point 3) and acceleration sensors C7-3 (marked as a test point 5) are respectively arranged on the side walls of end covers of a bearing C20 and a bearing D21, acceleration sensors D7-4 (marked as a test point 4) and acceleration sensors E7-5 (marked as a test point 6) are respectively arranged on the side walls of end covers of a bearing E22 and a bearing F23, and two acceleration sensors F7-6 (marked as a test point 7 and a test point 8) are arranged on the side wall of an end cover of a bearing; the measurement direction of the acceleration sensor B7-2 and one of the acceleration sensors A7-1 is along the gear meshing line direction, the measurement direction of the acceleration sensor D7-4 and the other acceleration sensor A7-1 is along the gear meshing line direction, the measurement direction of the acceleration sensor C7-3 and one of the acceleration sensors F7-6 is along the gear meshing line direction, and the measurement direction of the acceleration sensor E7-5 and the other acceleration sensor F7-6 is along the gear meshing line direction; two acceleration sensors A7-1, an acceleration sensor B7-2, an acceleration sensor C7-3, an acceleration sensor D7-4, an acceleration sensor E7-5 and two acceleration sensors F7-6 are connected with a signal line acquisition amplifier 29 through signal lines, and then the signal line acquisition amplifier is connected with a computer 30 for acquiring data; the models of the acceleration sensor A7-1, the acceleration sensor B7-2, the acceleration sensor C7-3, the acceleration sensor D7-4, the acceleration sensor E7-5 and the acceleration sensor F7-6 are the same;
step 2, opening a cooling system of the magnetic powder brake 6, and adjusting the flow of cooling water;
step 3, turning on the rotating speed torque sensor 2, the motor 4, the gear transmission system and the acceleration sensor 7;
and step 4, controlling the current of the magnetic powder brake 6 to adjust the load torque through the manual tension controller 28, adjusting the rotating speed of the motor 4 through the frequency converter 27, combining the rotating speed of different motors and the parameters of the load torque, and collecting the accelerated speeds of different test points through the acceleration sensor 7 to feed back to the computer 30 so as to test the vibration performance of the gear.
Through the mode, the testing device of the power dividing gear transmission system has the advantages that the acceleration sensors are arranged on the bearing end covers close to one sides of the gears, so that the acceleration sensors on the side walls of the two meshed gear bearing end covers and the meshing points are positioned on the same straight line, and the problem that the acceleration sensors cannot be arranged at the meshing points when the gears normally run can be solved; the running conditions of the gear transmission system under various working conditions are simulated through parameter combinations of different motor rotating speeds and load torques, and the vibration acceleration of each gear under different working conditions is obtained through an acceleration sensor, so that the vibration signal of the gear transmission system is accurately and quickly obtained, and the dynamic characteristics of the gear transmission system are verified; the testing method of the power split gear transmission system has the advantages of good stability, simplicity in operation and high testing precision, and can meet the requirements of vibration tests of the power split gear transmission system under various working conditions.
Claims (6)
1. The testing device of the power splitting gear transmission system is characterized by comprising a gear transmission system, wherein the input end of the gear transmission system is connected with a rotating speed and torque sensor (2) through a first coupler (1), the rotating speed and torque sensor (2) is connected with a motor (4) through a second coupler (3), and the output end of the gear transmission system is connected with a magnetic powder brake (6) through a third coupler (5); an acceleration sensor (7) is arranged on the gear transmission system.
2. The testing device of the power-splitting gear transmission system according to claim 1, wherein the gear transmission system comprises a box body (8), an input shaft (9) is arranged in the box body (8), a gear A (10) is connected to the input shaft (9), one end of the input shaft (9) far away from the gear A (10) extends out of the box body (8) to be connected with a first coupler (1), the testing device further comprises a transmission shaft A (11) and a transmission shaft B (26), the transmission shaft A (11) is sequentially connected with a gear B (12) and a gear C (13), the transmission shaft B (26) is sequentially connected with a gear D (14) and a gear E (15), the gear A (10) is respectively meshed with the gear B (12) and the gear D (14), the testing device further comprises an output shaft (16), the output shaft (16) is connected with a gear F (17), the gear F (17) is meshed with the gear C (13) and the gear E (15) respectively, and one end, far away from the gear F (17), of the output shaft (16) extends out of the box body (8) to be connected with the third coupler (5).
3. The testing device of the power-split gear transmission system according to claim 2, wherein the two ends of the input shaft (9), the transmission shaft A (11), the transmission shaft B (26) and the output shaft (16) are respectively fixed on the side wall of the box body (8) through bearings.
4. The testing device of the power-split gear transmission system according to claim 3, wherein the acceleration sensors (7) comprise a plurality of acceleration sensors, and the acceleration sensors (7) are respectively mounted on bearing end covers of the input shaft (9), the transmission shaft A (11), the transmission shaft B (26) and the output shaft (16).
5. The testing device of the power-split gear transmission system according to claim 1, further comprising a frequency converter (27) and a manual tension controller (28), wherein the frequency converter (27) is connected with the motor (4), and the manual tension controller (28) is connected with the magnetic-particle brake (6).
6. A method of testing a power split gear transmission system, comprising the steps of:
step 1, installing two acceleration sensors (7) on a bearing end cover at one end of an input shaft (9) close to a gear A (10), respectively installing one acceleration sensor (7) on the bearing end cover at two ends of a transmission shaft A (11), respectively installing one acceleration sensor (7) on the bearing end cover at two ends of a transmission shaft B (26), and installing two acceleration sensors (7) on a bearing end cover at one end of an output shaft (16) close to a gear F (17), so that the measurement directions of the acceleration sensors (7) on the two meshed gear bearing end covers are along the gear meshing line direction;
step 2, opening a cooling system of the magnetic powder brake (6) and adjusting the flow of cooling water;
step 3, turning on a rotating speed torque sensor (2), a motor (4), a gear transmission system and an acceleration sensor (7);
and step 4, controlling the current of the magnetic powder brake (6) to adjust the load torque through a manual tension controller (28), adjusting the rotating speed of the motor (4) through a frequency converter (27), and testing the gear acceleration under different parameter combinations of the rotating speed and the load torque of the motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911024241.9A CN110631828A (en) | 2019-10-25 | 2019-10-25 | Testing device and testing method for power split gear transmission system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911024241.9A CN110631828A (en) | 2019-10-25 | 2019-10-25 | Testing device and testing method for power split gear transmission system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110631828A true CN110631828A (en) | 2019-12-31 |
Family
ID=68977831
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911024241.9A Pending CN110631828A (en) | 2019-10-25 | 2019-10-25 | Testing device and testing method for power split gear transmission system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110631828A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111537224A (en) * | 2020-04-26 | 2020-08-14 | 西安工程大学 | Gear vibration testing device |
| CN115157134A (en) * | 2022-05-27 | 2022-10-11 | 山西柴油机工业有限责任公司 | Clamping device for gear wear fatigue and testing method |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2099876U (en) * | 1991-06-29 | 1992-03-25 | 山东省诸城摩托车厂 | Gearshift housing for agricultural tricycle |
| CN102706557A (en) * | 2012-06-06 | 2012-10-03 | 西北工业大学 | Multifunctional gear transmission testboard |
| CN202597633U (en) * | 2012-04-16 | 2012-12-12 | 华锐风电科技(集团)股份有限公司 | Power distributing differential wheel system gear case |
| CN202614526U (en) * | 2012-06-06 | 2012-12-19 | 西北工业大学 | Multifunctional gear transmission test bed |
| CN104697787A (en) * | 2015-03-20 | 2015-06-10 | 山东大学 | Gearbox test bed based on multi-information fusion and detection method thereof |
| CN205607636U (en) * | 2015-12-26 | 2016-09-28 | 王朝阁 | Gear box fault detection device based on vibration signal analysis |
| CN207181033U (en) * | 2017-08-26 | 2018-04-03 | 蚌埠学院 | A kind of Gear Fault Diagnosis testing stand |
| CN107884185A (en) * | 2017-11-13 | 2018-04-06 | 哈尔滨工业大学 | Single-stage double helical tooth planetary drive dynamics features Testbed |
| CN109187010A (en) * | 2018-07-12 | 2019-01-11 | 四川大学 | A kind of belt transmission system dynamic performance and testing |
-
2019
- 2019-10-25 CN CN201911024241.9A patent/CN110631828A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2099876U (en) * | 1991-06-29 | 1992-03-25 | 山东省诸城摩托车厂 | Gearshift housing for agricultural tricycle |
| CN202597633U (en) * | 2012-04-16 | 2012-12-12 | 华锐风电科技(集团)股份有限公司 | Power distributing differential wheel system gear case |
| CN102706557A (en) * | 2012-06-06 | 2012-10-03 | 西北工业大学 | Multifunctional gear transmission testboard |
| CN202614526U (en) * | 2012-06-06 | 2012-12-19 | 西北工业大学 | Multifunctional gear transmission test bed |
| CN104697787A (en) * | 2015-03-20 | 2015-06-10 | 山东大学 | Gearbox test bed based on multi-information fusion and detection method thereof |
| CN205607636U (en) * | 2015-12-26 | 2016-09-28 | 王朝阁 | Gear box fault detection device based on vibration signal analysis |
| CN207181033U (en) * | 2017-08-26 | 2018-04-03 | 蚌埠学院 | A kind of Gear Fault Diagnosis testing stand |
| CN107884185A (en) * | 2017-11-13 | 2018-04-06 | 哈尔滨工业大学 | Single-stage double helical tooth planetary drive dynamics features Testbed |
| CN109187010A (en) * | 2018-07-12 | 2019-01-11 | 四川大学 | A kind of belt transmission system dynamic performance and testing |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111537224A (en) * | 2020-04-26 | 2020-08-14 | 西安工程大学 | Gear vibration testing device |
| CN115157134A (en) * | 2022-05-27 | 2022-10-11 | 山西柴油机工业有限责任公司 | Clamping device for gear wear fatigue and testing method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103884502B (en) | A kind of variable speed leeward power generator planetary gear system method for diagnosing faults | |
| CN101723215B (en) | Method for detecting and compensating starting torque of frequency transformer for elevator | |
| CN102564756B (en) | Automobile transmission vibration analysis testing method and device | |
| CN101644624B (en) | Steering test bench of electrical-closed tracked vehicle transmission device | |
| CN205262736U (en) | Multistage planetary gear case combined test platform | |
| CN102494820B (en) | Electric dynamometer | |
| CN203719894U (en) | High-speed gear box test stand for electric vehicle | |
| CN210269162U (en) | Wind power gear box test bed measurement and control system for simulating working conditions | |
| CN103595327A (en) | Experiment estimation method of motor rotational inertia in electrical drive system | |
| CN210802888U (en) | Testing device for power split gear transmission system | |
| Osadchyy et al. | Laboratory Stand for Research of Energy Characteristics of Electric Vehicle Drives | |
| US20240192088A1 (en) | Semi-Physical Simulation Test Bench and Test Method for Multi-Machine Parallel Operation Device of Gas Turbines | |
| CN110793771A (en) | Test bench of simulation helicopter main reducing gear trouble | |
| CN110631828A (en) | Testing device and testing method for power split gear transmission system | |
| CN108844751A (en) | A kind of PHEV power platform system based on actual engine | |
| CN101814877A (en) | Gearbox torque testing system | |
| CN104931265B (en) | Large-scale Wind Turbines usability test device and its test method | |
| CN201662454U (en) | System for testing torque of gearbox | |
| CN106379757B (en) | A kind of no-station pole canopy rubber winding control system and its control method based on bus | |
| CN111766078B (en) | Test method for reliability test of electronic parking mechanism | |
| CN114544166B (en) | Electromechanical coupling simulation experiment table for simulating wind power variable speed load and non-torsion load | |
| CN201983928U (en) | Durable test bed for auto gearbox | |
| CN210198705U (en) | Mechanical power totally-enclosed test bed for ultra-large coaxial gear box | |
| CN205958710U (en) | Test platform of hydroelectric generator performance | |
| CN114486242A (en) | Aeroengine transmission system load spectrum and transmission efficiency measuring system |
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 | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20191231 |
|
| RJ01 | Rejection of invention patent application after publication |