CN201662454U - System for testing torque of gearbox - Google Patents
System for testing torque of gearbox Download PDFInfo
- Publication number
- CN201662454U CN201662454U CN2010201502017U CN201020150201U CN201662454U CN 201662454 U CN201662454 U CN 201662454U CN 2010201502017 U CN2010201502017 U CN 2010201502017U CN 201020150201 U CN201020150201 U CN 201020150201U CN 201662454 U CN201662454 U CN 201662454U
- Authority
- CN
- China
- Prior art keywords
- motor
- unit
- gearbox
- frequency converter
- gear case
- 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.)
- Expired - Lifetime
Links
Images
Landscapes
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The utility model discloses a system for testing torque of a gearbox, which comprises a motor unit, a generator unit, a prime motor unit and a gearbox unit under test and is characterized in that the motor unit comprises a motor G1 and a frequency converter C1; the generator unit comprises a motor G2 and a frequency converter C2; the motors in the motor unit and the generator unit are double-fed motors; the gearbox unit under test comprises a gearbox R1 under test and a gearbox R2 under test with the same speed ratio, wherein the low-speed ends of the gearbox R1 under test and the gearbox R2 under test are rigidly connected through a flange, and the high-speed ends are respectively connected on the motors in the motor unit and the generator unit; a prime motor G3 in the prime motor unit is connected with the motor G1 or the motor G2; and stator power supply wires of the motor G1 and the motor G2 are connected. The system has the advantages of simple structure, convenient production and low cost, and is also applicable to wide popularization in the torque testing field of the gearbox.
Description
Technical field
The utility model relates to a kind of gearbox torque testing system, relates in particular to a kind of system that carries out the gearbox torque test by control coiling electric motor rotor excitation current.
Background technology
Along with the continuous development of industries such as wind-power electricity generation, automobile making, more and more higher for the performance requirement of kernel component wherein-----gear case.In order to satisfy the performance test of gear case, just need design one and overlap at gear case under different rotating speeds, it is applied the test platform of different torques.More common have two kinds of schemes: first kind is respectively as generator and motor, as shown in Figure 1 with two asynchronous motors.Control two motors respectively by the total power frequency converter, under the speed that requires, tested gear case is produced the torque that requires, thus the performance of testing gears case.Second kind of scheme as shown in Figure 2, be with two synchronous motors respectively as generator G2 and motor G1, G3 is prime mover.In the time of work, the stator with motor G1 and generator G2 adjusts certain angle earlier, and the system that makes is in operation, and the rotor-exciting angle of motor G1 lags behind the rotor-exciting angle of generator G2, is convenient to apply torque.With G3 with system improving to requiring rotating speed.Give motor G1 as the electricity that the generator G2 of generator will send this moment, regulates motor G1, and the exciting current of generator G2 just can be implemented in and requires under the rotating speed, produces the torque that requires in tested gear case, reaches the purpose of test.
In actual applications, above-mentioned two kinds of schemes have following shortcoming:
For first kind of asynchronous machine scheme, because the stator side frequency converter is a full power operation, the capacity of frequency converter will mate with capacity motor.When capacity motor was little, the electronic devices and components in the frequency converter met the demands easily, but for big-and-middle capacity electrical machinery (more than the 1500KW), the capacity requirement of electronic devices and components is very high, made the frequency converter cost significantly promote, and caused the overall plan cost too high.
For second kind of synchronous motor scheme, tested gear case will carry very big torque in test, can produce certain elastic deformation on the face of gears at different levels of gear case and on the mechanical axis, this just makes and produces certain torsional angle between the input shaft of gear case and the output shaft.Because the electromagnetic torque of synchronous motor is relevant with rotor excitation current with power angle, above-mentioned reason causes motor G1 rotor to become big with the hysteresis excitation angle of generator G2 rotor, make the setting range of power angle diminish, because the synchronous machinery excitation electric current is a DC excitation, the rotor-exciting angle is uncontrollable, therefore can't meet the requirements of torque by independent adjustment rotor excitation current, must adjust the synchronous motor stator angle by mechanical means (rotational synchronization motor housing), and then change the influence that the rotor-exciting phasing degree comes compensation power angle variation range to diminish and produce.
A kind of in sum cost is low, and it is very necessary that gearbox torque testing system easy to use is developed.
Summary of the invention
At the problem of above-mentioned synchronous motor and asynchronous machine scheme middle gear case testing table, the utility model proposes a kind of system that carries out the gearbox torque test by control coiling electric motor rotor excitation current.The technological means that the utility model adopted is as follows:
A kind of gearbox torque testing system comprises motor unit, generator unit, prime mover unit and tested gearbox unit; It is characterized in that described motor unit comprises motor G1 and frequency converter C1, described generator unit comprises motor G2 and frequency converter C2, and the motor in motor unit and the generator unit is a double feedback electric engine; Tested gearbox unit comprises tested gear case R1 and the tested gear case R2 that speed ratio is identical, the low speed end of wherein tested gear case R1 and tested gear case R2 is rigidly connected by flange, and speed end is connected respectively on the motor in motor unit and the generator unit; Prime mover G3 is connected with motor G1 or motor G2 in described prime mover unit, and the stator power wiring of motor G1 and motor G2 connects.
Be provided with torque sensor S1 and torque sensor S2 at tested gear case R1 and tested gear case R2 with the junction of motor G1 and motor G2.
Under the constant prerequisite of rotation direction, by changing the frequency of frequency converter C1 and frequency converter C2, thereby the rotor excitation current of regulating motor in motor unit and the generator unit changes the phasing degree of rotor-exciting makes motor unit become generator unit, and generator unit becomes motor unit.
Because the gearbox torque testing system that has adopted technique scheme, the utility model to provide, it is conspicuous comparing its advantage with prior art, specific as follows:
1, compare with the asynchronous machine scheme, the utility model does not need to adopt the total power frequency converter to carry out Electric Machine Control, and plant maintenance is convenient, saves equipment cost greatly.
2, compare with the synchronous motor scheme, because the utility model rotor exciting current amplitude and the equal scalable of phase place, thereby can adjust torque on a large scale, the equipment that makes can be worked under various torques.
The application is by the frequency and the size of dynamic adjustments rotor current, realize the torque control of coiling electric motor, both solved the problems referred to above, the control accuracy that has both kept the asynchronous machine scheme is good, the little advantage of energy loss, has kept the low advantage of equipment cost of synchronous motor scheme again.Simple in structure based on it, be convenient to produce, and with low cost being suitable for extensively promoted in the gearbox torque field tests.
Description of drawings
Fig. 1 is an asynchronous machine scheme line chart;
Fig. 2 is a synchronous motor scheme line chart;
Fig. 3 is the electrical configurations sketch of the utility model embodiment.
Embodiment
The utility model adopts the rotor excitation current of control coiling electric motor (double feedback electric engine) to adjust rotor-exciting phasing degree and intensity, and then the torque of control motor, realizes the torque testing of gear case.
As shown in Figure 3, described gearbox torque testing system, tested gear case R1 is two identical tested gear casees of speed ratio with tested gear case R2.The low speed end of tested gear case R1 and tested gear case R2 is by the butt joint of flange rigidity, and speed end is connected respectively on motor G1 and the motor G2; Torque sensor S1 and torque sensor S2 are torque sensor, can detect the torque that produces on tested gear case R1 and the tested gear case R2 high speed shaft; With the stator power wiring of motor G1 and motor G2 interconnection, frequency converter C3 is the frequency converter of control prime mover G3, mainly is that the energy loss for total system affords redress, and also is used for regulating simultaneously the rotating speed of total system.When prime mover G3 dragging system arrives under the situation of certain rotating speed,, will produce AC power in stator side for generator G2.This power supply passes to the stator of motor motor G1 by connection.Frequency converter C1 and frequency converter C2 are the frequency converter of control double feedback electric engine, by regulating the phasing degree that rotor excitation current changes rotor-exciting, when the exciting current frequency is zero, form stable magnetic field at the rotor of motor G1 and motor G2, this moment, the rotor-exciting phasing degree kept stablizing constant.Can adjust the intensity of rotor-exciting by the amplitude that changes exciting current this moment, and then change the torque that motor produces; When needs were adjusted the rotor-exciting angle, the output exciting current that only needs to adjust the rotor-side variable frequency device can be realized.Can change electromagnetic torque and excitation angle by said method, thereby be implemented under the torque of each requirement, the purpose of testing.After one of them gear case test is finished, another gear case is tested can be under the constant prerequisite of rotation direction, by changing output current frequency and the amplitude of frequency converter C1 and frequency converter C2, the phasing degree that changes rotor-exciting with the rotor excitation current of regulating motor in motor unit 1 and the generator unit 2 makes motor unit 1 become generator unit, generator unit 2 becomes motor unit, has reached the purpose that another gear case performance is tested.
The utility model is described in further detail below in conjunction with accompanying drawing and an embodiment:
A kind of gearbox torque testing system that the utility model is realized, as shown in Figure 3, wherein the G1 stator wiring of motor unit 1 links to each other by contactor K1 with the G2 stator wiring of generator unit 2, and the inlet wire side of frequency converter C1 and frequency converter C2 is received on the 690V AC network simultaneously.The G1 rotor of motor unit 1 is rigidly connected on two input ends of tested gearbox unit 4 by shaft coupling with the G2 rotor of generator unit 2.Frequency converter C3 inlet wire side in prime mover unit 3 links to each other with the 690V AC network, and the G2 rotor in the rotor of prime mover G3 and the generator unit 2 is rigidly connected by shaft coupling
Two double feedback electric engine G1 and G2 are respectively as electric operation and generator operation.The double feedback electric engine capacity is 3400KW, and the stator rated voltage is 750V, and the stator rated current is 2978A, and the stator frequency scope is 0～75Hz, and the rotor open-circuit voltage is 10050V, and rotor current is 246A.Prime mover G3 capacity is 630KW, and rated voltage is 690V, and the rotational speed regulation scope is 0～2200r/min.
When gear case was tested, the contactor K1 that at first closes made the stator butt joint of motor G1 and motor G2.Regulate the frequency and the amplitude of frequency converter C1 and frequency converter C2 output current, make that output current frequency is zero, at this moment the rotor-exciting phasing degree of motor G1 and motor G2 keeps stablizing constant.Regulate the output current of frequency converter C3 then, prime mover G3 is dragged to total system on the tested rotating speed of requirement.The frequency of adjusting the output current of frequency converter C1 and frequency converter C2 can change motor G1 and motor G2 rotor-exciting phase differential, and the size of adjusting the output current of frequency converter C1 and frequency converter C2 can change motor G1 and motor G2 rotor-exciting intensity.According to the characteristic of electric rotating machine, can change torque between motor G1 and the motor G2 by changing rotor-exciting phase differential and excitation intensity.For motor G1 is moved as motor, motor G2 further adjusts the frequency of frequency converter C1 and frequency converter C2 output current as generator operation, makes the rotor-exciting phasing degree of motor G2 be ahead of the rotor-exciting phasing degree of motor G1.After the rotor-exciting of motor G1 and motor G2 is stable, can test.
In an embodiment, stator and rotor wiring place at motor (motor G1, motor G2), be furnished with current-voltage transformer (precision is 0.2 grade), the actual current magnitude of voltage of motor stator and rotor can be returned to master control system, be used for calculating the actual phase angle and the amplitude in rotor-exciting magnetic field.What frequency converter C1, frequency converter C2, frequency converter C3 adopted is the 6SE70 of Siemens Company series of products, and rotor exciting current amplitude and phase angle are given to be realized by the frequency and the amplitude of regulating the frequency converter output current.Rotating speed coder is installed at the motor shaft place, and the motor actual speed is fed back to frequency converter.By being installed in the actual output torque that torque meter on the high speed shaft measures motor, and signal is returned to master control system, be used for carrying out closed-loop control.
According to test request, by regulating output current amplitude and the frequency of frequency converter C1, frequency converter C2, frequency converter C3, make total system under different rotating speeds, on tested gear case, produce the torque that requires, just can realize the test of whole gear case.Electrical system need detect the electric parameters such as output torque, motor G1 and motor G2 stator rotor current/voltage of rotating speed, motor G1 and the motor G2 of motor G1 and motor G2, and by the participation of the torque rotary speed controlling models in main control unit computing, make total system stable, can reach the preferable performance index.
The above; it only is the preferable embodiment of the utility model; but protection domain of the present utility model is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; be equal to replacement or change according to the technical solution of the utility model and inventive concept thereof, all should be encompassed within the protection domain of the present utility model.
Claims (3)
1. a gearbox torque testing system comprises motor unit (1), generator unit (2), prime mover unit (3) and tested gearbox unit (4); It is characterized in that described motor unit (1) comprises motor G1 and frequency converter C1, described generator unit (2) comprises motor G2 and frequency converter C2, and the motor in motor unit (1) and the generator unit (2) is a double feedback electric engine; Tested gearbox unit (4) comprises tested gear case R1 and the tested gear case R2 that speed ratio is identical, the low speed end of wherein tested gear case R1 and tested gear case R2 is rigidly connected by flange, and speed end is connected respectively on the motor in motor unit (1) and the generator unit (2); Prime mover G3 is connected with motor G1 or motor G2 in described prime mover unit (3), and the stator power wiring of motor G1 and motor G2 connects.
2. gearbox torque testing system according to claim 1 is characterized in that being provided with torque sensor S1 and torque sensor S2 at tested gear case R1 and tested gear case R2 with the junction of motor G1 and motor G2.
3. gearbox torque testing system according to claim 1 and 2, it is characterized in that under the constant prerequisite of rotation direction, by changing the frequency of frequency converter C1 and frequency converter C2, thereby the rotor excitation current of regulating motor in motor unit (1) and the generator unit (2) changes the phasing degree of rotor-exciting makes motor unit (1) become generator unit, and generator unit (2) becomes motor unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201502017U CN201662454U (en) | 2010-03-31 | 2010-03-31 | System for testing torque of gearbox |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201502017U CN201662454U (en) | 2010-03-31 | 2010-03-31 | System for testing torque of gearbox |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201662454U true CN201662454U (en) | 2010-12-01 |
Family
ID=43232873
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201502017U Expired - Lifetime CN201662454U (en) | 2010-03-31 | 2010-03-31 | System for testing torque of gearbox |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201662454U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101814877A (en) * | 2010-03-31 | 2010-08-25 | 大连华锐股份有限公司 | Gearbox torque testing system |
| CN102809484A (en) * | 2012-08-08 | 2012-12-05 | 大连华锐重工集团股份有限公司 | Loading test bed for walking winding speed reducer in engineering machinery |
| CN104614107A (en) * | 2015-01-12 | 2015-05-13 | 江苏金陵自控技术有限公司 | Full-electronic motor torque real-time detection circuit |
| CN106199420A (en) * | 2016-06-24 | 2016-12-07 | 北京新能源汽车股份有限公司 | Power angle characteristic curve test method and test platform of permanent magnet motor |
-
2010
- 2010-03-31 CN CN2010201502017U patent/CN201662454U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101814877A (en) * | 2010-03-31 | 2010-08-25 | 大连华锐股份有限公司 | Gearbox torque testing system |
| CN102809484A (en) * | 2012-08-08 | 2012-12-05 | 大连华锐重工集团股份有限公司 | Loading test bed for walking winding speed reducer in engineering machinery |
| CN104614107A (en) * | 2015-01-12 | 2015-05-13 | 江苏金陵自控技术有限公司 | Full-electronic motor torque real-time detection circuit |
| CN104614107B (en) * | 2015-01-12 | 2017-12-12 | 江苏金陵自控技术有限公司 | A kind of full electronic motor torque real-time detection circuit |
| CN106199420A (en) * | 2016-06-24 | 2016-12-07 | 北京新能源汽车股份有限公司 | Power angle characteristic curve test method and test platform of permanent magnet motor |
| CN106199420B (en) * | 2016-06-24 | 2018-09-11 | 北京新能源汽车股份有限公司 | Power Angle Characteristic Curve Test Method and Test Platform of Permanent Magnet Motor |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101031719B (en) | Transmission chain for wind power equipment and method for controlling rotation speed or torque | |
| CN102645632B (en) | Efficiency test system and control method for no-angle sensor of permanent magnet synchronous motor | |
| CN201955405U (en) | Frequency converter load testing system | |
| CN103560735B (en) | Control method for electro-magnetic synchronous motor | |
| CN101272119B (en) | Method for restraining imbalance and deformation of double-feedback type wind generator set stator current | |
| CN105811825A (en) | Current compensation based power decoupling method of virtual synchronous power generator | |
| CN201662454U (en) | System for testing torque of gearbox | |
| CN101814877A (en) | Gearbox torque testing system | |
| CN110601272B (en) | Back-to-back converter control method and system based on virtual synchronous machine | |
| Sun et al. | Application of electrical variable transmission in wind power generation system | |
| CN103580055A (en) | Open type grid-connection experiment system of variable-speed constant-frequency double-fed wind power generator unit and open type grid-connection experiment method | |
| CN105226720A (en) | Magneto alternator networking side converter improves droop control method | |
| CN100468908C (en) | Rotary electromagnetic type uniform tidal current controller | |
| CN201753653U (en) | Variable-speed hydroelectric generator unit based on power split and confluence | |
| CN102405574A (en) | Energy generating installation, especially wind power installation | |
| CN106533289A (en) | Non-linear voltage control method and system | |
| CN1794562A (en) | Speed changing constant frequency method of wind force generation | |
| CN101918259B (en) | An economic operation method of an engine having servo control system | |
| CN204832458U (en) | Energy repayment type asynchronous machine test platform | |
| CN108631299A (en) | The grid-connected island mode switching method of magneto alternator micro-grid system | |
| KR20100009387A (en) | Simulator for wind power generation system | |
| CN107925249A (en) | The method and system that the network voltage of distributed energy resource is adjusted | |
| CN105099320A (en) | Method and device for controlling output active power of permanent magnet direct-drive wind driven generator | |
| Li et al. | DFIG-based wind farm electromagnetic dynamic model and impact on protection relay of transmission network | |
| CN1128348A (en) | Aero-generator power supply comprehensive experiment table |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: DALIAN HUARUI HEAVY INDUSTRY GROUP CO., LTD. Free format text: FORMER OWNER: HUARUI CO., LTD., DALIAN Effective date: 20120419 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20120419 Address after: 116013 Bayi Road, Xigang District, Liaoning, China, No. 169, No. Patentee after: Dalian Huarui Heavy Industry Group Co., Ltd. Address before: 116013 Bayi Road, Xigang District, Liaoning, China, No. 169, No. Patentee before: Huarui Co., Ltd., Dalian |
|
| CX01 | Expiry of patent term |
Granted publication date: 20101201 |
|
| CX01 | Expiry of patent term |