CN101814877A - Gearbox torque testing system - Google Patents
Gearbox torque testing system Download PDFInfo
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- CN101814877A CN101814877A CN201010138939A CN201010138939A CN101814877A CN 101814877 A CN101814877 A CN 101814877A CN 201010138939 A CN201010138939 A CN 201010138939A CN 201010138939 A CN201010138939 A CN 201010138939A CN 101814877 A CN101814877 A CN 101814877A
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Abstract
The invention discloses a gearbox torque testing system comprising a motor unit, a generator unit, a prime mover unit and a tested gearbox unit. The gearbox torque testing system is characterized in that the motor unit comprises a motor G1 and an inverter C1; the generator unit comprises a motor G2 and an inverter C2, and the motors in the motor unit and the generator unit are doubly-fed motors; the tested gearbox unit comprises a tested gearbox R1 and a tested gearbox R2 which have the same speed ratio, wherein the low-speed ends of the tested gearbox R1 and the tested gearbox R2 are rigidly connected through flanges, and high-speed ends are respectively connected with the motors in the motor unit and the generator unit; a prime mover G3 in the prime mover unit is connected with the motor G1 or the motor G2; and connecting wires of stator power supplies of the motor G1 and the motor G2 are connected with each other. The system has the advantages of simple structure, convenient production and low cost and is suitable for extensive popularization in the field of gearbox torque testing.
Description
Technical field
The present invention relates to a kind of gearbox torque testing system, relate in particular to a kind of system that carries out the gearbox torque test by control coiling electric motor rotor excitation current.
Background technology
--performance requirement of----gear box is more and more higher along with the continuous development of industries such as wind power generation, automobile making, for kernel component wherein.In order to satisfy the performance test of gear box, just need design one and overlap at gear box 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 box 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 machines 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 box, 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 machine scheme, tested gear box will carry very big torque in test, can produce certain elastic deformation on the face of gears at different levels of gear box and on the mechanical axis, this just makes and produces certain torsional angle between the power shaft of gear box and the output shaft.Because the electromagnetic torque of synchronous machine 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 adjusting 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 phase angle comes compensation power angle excursion 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 machine and asynchronous machine scheme middle gear case testing stand, the present invention proposes a kind of system that carries out the gearbox torque test by control coiling electric motor rotor excitation current.The technology used in the present invention means are 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 box R1 and the tested gear box R2 that speed ratio is identical, the low speed end of wherein tested gear box R1 and tested gear box 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 box R1 and tested gear box 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 phase angle of rotor-exciting makes motor unit become generator unit, and generator unit becomes motor unit.
Since adopted technique scheme, gearbox torque testing system provided by the invention, and it is conspicuous comparing its advantage with prior art, specific as follows:
1, compare with the asynchronous machine scheme, the present invention 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 machine scheme, because rotor exciting current amplitude of the present invention 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 precision 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 machine 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 machine scheme line chart;
Fig. 3 is the electrical configurations sketch of the embodiment of the invention.
Embodiment
The present invention adopts the rotor excitation current of control coiling electric motor (double feedback electric engine) to adjust rotor-exciting phase angle and intensity, and then the torque of control motor, realizes the torque testing of gear box.
As shown in Figure 3, described gearbox torque testing system, tested gear box R1 is two identical tested gear boxes of speed ratio with tested gear box R2.The low speed end of tested gear box R1 and tested gear box 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 box R1 and the tested gear box 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 whole system affords redress, and also is used for regulating simultaneously the rotating speed of whole 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 phase angle 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 phase angle 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 box test is finished, another gear box 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 phase angle 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 box performance is tested.
The invention will be further described below in conjunction with accompanying drawing and an embodiment:
A kind of gearbox torque testing system that the present invention 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 inputs 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 box 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 phase angle of motor G1 and motor G2 keeps stablizing constant.Regulate the output current of frequency converter C3 then, prime mover G3 is dragged to whole 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 difference, 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 difference 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 phase angle of motor G2 be ahead of the rotor-exciting phase angle 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 whole system under different rotating speeds, on tested gear box, produce the torque that requires, just can realize the test of whole gear box.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 whole system stable, can reach the preferable performance index.
The above; only be the preferable embodiment of the present invention; but protection scope of the present invention is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the present invention discloses; be equal to replacement or change according to technical scheme of the present invention and inventive concept thereof, all should be encompassed within protection scope of the present invention.
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 box R1 and the tested gear box R2 that speed ratio is identical, the low speed end of wherein tested gear box R1 and tested gear box 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 box R1 and tested gear box 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 phase angle 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 |
|---|---|---|---|
| CN201010138939A CN101814877A (en) | 2010-03-31 | 2010-03-31 | Gearbox torque testing system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010138939A CN101814877A (en) | 2010-03-31 | 2010-03-31 | Gearbox torque testing system |
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| CN101814877A true CN101814877A (en) | 2010-08-25 |
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| CN201010138939A Pending CN101814877A (en) | 2010-03-31 | 2010-03-31 | Gearbox torque testing system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102331318A (en) * | 2011-10-17 | 2012-01-25 | 大连华锐股份有限公司 | Test system for torque of gear box |
| CN102410931A (en) * | 2011-07-27 | 2012-04-11 | 重庆齿轮箱有限责任公司 | Testing apparatus of axial load loading of gear case and testing method thereof |
| CN102830267A (en) * | 2012-09-07 | 2012-12-19 | 高精科技(苏州)有限公司 | Gearbox current measuring device |
| CN102829972A (en) * | 2012-08-23 | 2012-12-19 | 大连华锐重工集团股份有限公司 | Single-power-source driven direct-current motor counter-trawling loading system |
| CN105429517A (en) * | 2015-12-14 | 2016-03-23 | 武汉钢铁(集团)公司 | Master and slave drive synchronous method for motor driving apparatus |
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| DE19704016A1 (en) * | 1997-02-04 | 1998-08-06 | Hansbernd Berzheim | Test bed for testing gear box or combination of boxes |
| JP2006023244A (en) * | 2004-07-09 | 2006-01-26 | Shinko Electric Co Ltd | Gear noise measuring apparatus |
| CN1721833A (en) * | 2004-07-12 | 2006-01-18 | 天津市天派工业自动化技术有限公司 | Automobile gear box loading check test bench |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102410931A (en) * | 2011-07-27 | 2012-04-11 | 重庆齿轮箱有限责任公司 | Testing apparatus of axial load loading of gear case and testing method thereof |
| CN102410931B (en) * | 2011-07-27 | 2014-07-30 | 重庆齿轮箱有限责任公司 | Testing apparatus of axial load loading of gear case and testing method thereof |
| CN102331318A (en) * | 2011-10-17 | 2012-01-25 | 大连华锐股份有限公司 | Test system for torque of gear box |
| CN102331318B (en) * | 2011-10-17 | 2013-12-25 | 大连华锐重工集团股份有限公司 | Test system for torque of gear box |
| CN102829972A (en) * | 2012-08-23 | 2012-12-19 | 大连华锐重工集团股份有限公司 | Single-power-source driven direct-current motor counter-trawling loading system |
| CN102829972B (en) * | 2012-08-23 | 2014-07-23 | 大连华锐重工集团股份有限公司 | Single-power-source driven direct-current motor counter-trawling loading system |
| CN102830267A (en) * | 2012-09-07 | 2012-12-19 | 高精科技(苏州)有限公司 | Gearbox current measuring device |
| CN102830267B (en) * | 2012-09-07 | 2014-09-03 | 高精科技(苏州)有限公司 | Gearbox current measuring device |
| CN105429517A (en) * | 2015-12-14 | 2016-03-23 | 武汉钢铁(集团)公司 | Master and slave drive synchronous method for motor driving apparatus |
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Owner name: DALIAN HUARUI HEAVY INDUSTRY GROUP CO., LTD. Free format text: FORMER OWNER: HUARUI CO., LTD., DALIAN Effective date: 20120412 |
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Effective date of registration: 20120412 Address after: 116013 Bayi Road, Xigang District, Liaoning, China, No. 169, No. Applicant after: Dalian Huarui Heavy Industry Group Co., Ltd. Address before: 116013 Bayi Road, Xigang District, Liaoning, China, No. 169, No. Applicant before: Huarui Co., Ltd., Dalian |
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Application publication date: 20100825 |