CN2044647U - Experimental platform for simulating torsion in axle series of internal-combustion engine - Google Patents
Experimental platform for simulating torsion in axle series of internal-combustion engine Download PDFInfo
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- CN2044647U CN2044647U CN 89202633 CN89202633U CN2044647U CN 2044647 U CN2044647 U CN 2044647U CN 89202633 CN89202633 CN 89202633 CN 89202633 U CN89202633 U CN 89202633U CN 2044647 U CN2044647 U CN 2044647U
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- combustion engine
- torsion
- torsional oscillation
- motor
- axle
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Abstract
The utility model discloses an experimental platform for simulating torsion in axle series of internal-combustion engine, and two torsional pendulum or more torsional pendulum systems are simulate the torsion vibration of various rotation transmission axle series. Simultaneously, the axle series can have free rotation in the range of 6-3000 rpm, and 6-1000Hz compulsion vibration is generated by the function of a torsion vibration electric motor controlled by a frequency conversion power supply, making the axle series generate resonance. At this time, performance test can be carried out for various torsion vibration absorbers which are installed at the end of the axle through a test system. The torsion vibration electric motor which is in the utility model can also be used as a universal torsion vibration exciter, having function on a mechanical structure or the transmission axle series to carry out the dynamic property experiment and fatigue experiment for actual engineering structure.
Description
The utility model is about the torsional excitation device, can simulate the torsional oscillation situation of internal combustion engine shafting and various rotating drive shaft system, and can be used to carry out easily the performance test of various torshional vibration dampers, this device also can be used as a kind of torsional excitation device simultaneously, actual axle system is produced under any rotating speed, the torsional oscillation of optional frequency is so that analyze the torsional vibration characteristic of actual axle system.
The torsional excitation device of axle system has various forms and means at present.As U.S.Pat.NO.3,693,402 described torsional oscillation damping shock absorber testing machines comprise an electromagnetic driver, and a dish is housed on axle, a fan-shaped fluted disc of being made by permeability magnetic material is housed again on the dish, when axle rotates, produce a magnetic field, the fan-shaped disk of rotation is produced the attraction force of an alternation, as a result, cause a vibration torsional interaction on the axle that rotates.When motor drags axle is to a certain rotating speed, and axle system is slowed down, and when the alternate torque frequency on acting on axle is consistent with a natural frequency of system, excites the resonant vibration of shafting that vibration damper is housed, thereby can measure the characteristic of vibration damper.But this device can only be a characteristic of measuring vibration damper in the moderating process through the utmost point of resonance zone in the short time at axle, and when spool being fixedly the time, can only test under a certain fixing rotating speed.As want the variation of simulated engine condition, and needing to change the inertia of flywheel, the rigidity of axle, the number of teeth of fan-shaped fluted disc, variation is big, and does not connect and be used to.
Another kind of form such as U.S.Pat.NO.4,283, the 957 described torsional excitation devices that are used on the turning round equipment, it is by the revolution hydraulic unit driver, and liquid energy feeder, signal feedback circuit, and control circuit composition are the actuators of a closed loop control.Though it can drive other device with desirable torsion frequency and amplitude, it can not simulate the torsional oscillation situation of axle system, and the cost height, thereby just is restricted in the use.
Also just like U.S.Pat.NO.3,054,284 described torsional oscillation damping shock absorber testing apparatuss, drag main shaft, drive the device that a cover on the countershaft has eccentric massblock by gear mechanism and rotate with adjustable speed motor, because the rotating shaft of eccentric is perpendicular to countershaft, thereby produced a moment of torsion that makes the countershaft swing, countershaft then can be dragged to the rotating speed of requirement by motor, and the vibration damper of experiment usefulness is contained on the countershaft.This is the typical mechanical actuation device of a cover, complex structure and heaviness, and the relation of processing difficulties and torsional oscillation amplitude that is produced and frequency is more single, is difficult to the bigger torsional oscillation situation of analog variation scope.
The purpose of this utility model is to provide a kind of and simulates internal combustion engine shafting and various rotating drive shaft is the device of torsional oscillation, this device can be according to different actual axle systems, can make things convenient for and change continuously the natural frequency of this assembly axis system, and can provide rotating speed in 6-3000 rev/min of scope, the torsional excitation of frequency in 6-1000HZ.
As everyone knows, the simplest reduced form of internal combustion engine shafting or other drive line is simplified to a two system of rocking exactly.Therefore, the utility model is started with from two systems of rocking exactly, simulates the torsional oscillation situation of axle system.In the utility model, two inertia that rock system are removable, and one of them flywheel is continuously adjustable, can change the natural frequency of system by regulating its inertia like this.At two end dress vibration damper or other devices that rock system, the other end connects the motor exciting bank.
The motor exciting device is by dragging electric rotating machine, and torsional oscillation motor and variable-frequency power sources three are partly formed, and the torsional oscillation motor is a special direct current motor, and the magnetic circuit of magnetic pole of the stator repeatedly is pressed into silicon steel plate.When armature feeds direct current, exciting winding connects variable frequency alternating current power source, and then every utmost point magnetic flux is with regard to positive and negative alternation, and the torque that motor produces numerically is positive and negative alternation, shows in the rotating shaft it is not rotate and form torsional oscillation.During driven by motor rotation that the torsional oscillation motor is flexible coupling by another and it, the torsional oscillation moment of torsional oscillation motor itself is constant, and therefore, the rotating shaft of torsional oscillation motor is just not only rotated but also torsional oscillation.The rotating speed of rotating shaft is determined by dragging electric rotating machine, the torsion frequency of rotating shaft determines that by variable-frequency power sources the rotating speed of dragging motor is adjustable continuously, the stepless variation of frequency energy of variable-frequency power sources, therefore, the torsional oscillation motor becomes the exciting device that produces different torsion frequencies under different rotating speeds.
Below in conjunction with accompanying drawing, the utility model will be further described.
Fig. 1 is the mechanical device part;
Fig. 2 is the structure of adjustable flywheel;
Fig. 3 is the circuit connection diagram of motor exciting bank;
Fig. 4 is the circuit of variable-frequency power sources.
Can see that from Fig. 1 the shafting torsional oscillation simulator is equipped with and two rocks system (13), there is an axle (14) in this system.Connect a flywheel (15) at the one end, one adjustable flywheel (10) is housed at its other end.(its working principle describes in detail hereinafter again).Axle (14) prolongation axle (21) in the outside of adjustable flywheel (10) is being supported by the rolling bearing (6) that is sitting in the support (7), supports (7) and is fixed on the base (8).At a distolateral affixed flange plate (2) that prolongs axle (21), on flange plate by bolt (20) mounting dampers (1) or other device easily.Installation one number of teeth is 60 or 120 fluted disc (3) between bearing (6) and flange plate (2), and one is installed in the close fluted disc (3) of sensor (4) on the support (5), produces an electrical signal, with the rotating speed and the torsional vibration situation of reflection axle system.
As seen, adjustable flywheel (10) is divided into three sector units, is processed with a radially-directed groove in every back side portion from Fig. 2, can radially slide along three guiding ribs on the disk (11), and disk is fixed on the axle (13).Another side at sector unit is processed with screw thread, on dish (12), be processed with the screw-thread fit on centering involute screw thread and sector, because dish (12) is rotatable, can make three sector units along separately guiding groove so twist dish (12), equidistant radial variation, thereby change the rotary inertia of adjustable flywheel (10), and then change two natural frequencys of rocking system.After adjustment, by two nuts (9) with adjustable flywheel (10) and two disks (11), (12) compress, locked.
Connect the motor exciting device at two opposite sides that rock system (13).The motor exciting device is formed by dragging electric rotating machine (18), torsional oscillation motor (16) and variable-frequency power sources (30).
Torsional oscillation motor (16) is a special direct current generator, and the magnetic circuit of magnetic pole of the stator repeatedly is pressed into silicon steel plate.Torque formula according to direct current generator:
M＝Cm.φ.Ia
The torque M that motor produces is directly proportional with the product of magnetic pole magnetic flux φ and armature supply Ia.As armature feeding direct current Ia, exciting winding connects variable frequency alternating current power source, and then every utmost point magnetic flux φ is with regard to positive and negative alternation.The torque that motor produces numerically is positive and negative alternation, shows in the rotating shaft it is not rotate and form torsional oscillation.
When dragging electric rotating machine (18) when driving torsional oscillation motors (16) rotation by be flexible coupling (17), the torsional oscillation moment of torsional oscillation motor (16) itself is constant.Therefore the rotating shaft of torsional oscillation motor (16) just can not only be rotated but also torsional oscillation.The rotating speed of rotating shaft determines that by dragging electric rotating machine (18) torsion frequency of rotating shaft is determined by variable-frequency power sources.The rotating speed of dragging motor is adjustable continuously, and the frequency of variable-frequency power sources can stepless variation.Therefore, torsional oscillation motor (16) becomes the exciting bank that produces different torsion frequencies under different rotating speeds.
Fig. 3 is the circuit connection diagram of motor exciting device.The power supply of motor exciting device is the ac power supply of 220V.Power supply links by power switch (22) and circuit, power supply acts on a DC electrical source on the parallel inverter circuit (28) of variable-frequency power sources (30) by automatic coupling voltage regulator and rectifier (31), parallel inverter circuit (28) produces a frequency conversion voltage at output terminal and acts on the torsional oscillation motor (16) under the triggering of trigger (29).The output frequency that frequency modulation turn-knob (27) can change variable-frequency power sources is housed on the trigger (29), and trigger (29) also links by power switch (22) and power supply.By power switch (22) also in parallel simultaneously an automatic coupling voltage regulator (24) on power supply, automatic coupling voltage regulator (24) links with dragging motor (18) through single-phase full wave rectifier (25), (26).
Variable-frequency power sources (30) as shown in Figure 4.In parallel inverter circuit (28), U
dBe the DC electrical source that adds, L is flat ripple reactance, D
6, D
7Be that isolating diode makes capacitor C
6Can not discharge C by exciting winding
6Be to turn-off electric capacity to make controllable silicon S
1And S
2Force shutoff in turn.When trigger impulse alternately triggers S with certain frequency
1And S
2The time, exciting winding just can produce the alternating flux of corresponding frequencies.
In trigger (29), galvanic current source of output after the transformation of ABAP Adapter process mu balanced circuit (32), the rectification, oscillator (33) and two Shaper amplification circuits (34), (35) all are connected in parallel on the output terminal of mu balanced circuit (32), by changing the frequency modulation turn-knob (27) in the oscillator (33), an exportable oscillating current, the output terminal of oscillator (33) and di-Shaper amplification circuit (34), (35) are with the controllable silicon S in the trigger impulse access parallel inverter circuit (28) that is produced
1, S
2On, to trigger S
1And S
2
When the connection power supply makes the work of shafting torsional oscillation simulator, tune knob (27) frequently and can change the torsion frequency of torsional oscillation motor (16), thereby the excited frequency of regulating motor exciting device (36) is to desired torsion frequency, make it to excite and two rock system (13) and resonate with it, so produce a bigger torsional oscillation drive with spool (21) on flange plate (2) vibration damper (1) or other device that link.
The amplitude of torsional oscillation can realize by regulating automatic coupling voltage regulator (23).Change automatic coupling voltage regulator (23), can change the input current of torsional oscillation motor (16), thereby changed the output torque of torsional oscillation motor (16), and then make the two torsional oscillation amplitudes that rock system (13) that evoked by motor exciting device (36) change, make it to reach desired amplitude.
When the shafting torsional oscillation simulator is worked, drag electric rotating machine (18) by soft connection, drive torsional oscillation motor (16), two vibration damper (1) or other device that rocks system (13), axle (21) and be installed on the flange plate (2) rotate together.Regulate automatic coupling voltage regulator (24), can make and drag electric rotating machine (18) is to be dragged to desired rotating speed with axle.
When the axle system of the motor of being simulated or other system change, can change its rotary inertia by regulating adjustable flywheel (10), and then change two natural frequencys of rocking system.
When the shafting torsional oscillation simulator is worked, produce an electrical signal of experiencing shafting torsional oscillation and rotation by a electromagnetic sensor (4) near fluted disc (3), being introduced into electronics torsiograph (19) amplifies, insert tachometer (37) and monitor unit or recorder (38) then, the state when monitoring the running of axle system thus.
Because the adjusting of the natural frequency of vibration of the rotating speed of excited frequency, exciting amplitude, axle system, axle system all is stepless variation, carry out alone, incoherent mutually, therefore can simulate in a big way in, the shafting torsional oscillation situation of complexity.
This Laboratory Furniture has many standard equipment, resembles dragging motor, the electronics torsiograph, automatic coupling voltage regulator etc., thus easily manufactured, and the cost of device is reduced.
This shafting torsional oscillation simulation table with the torsional oscillation situation that two systems of rocking come simulated engine axle system or other system, can be carried out the performance test of various torshional vibration dampers.Also the replacement of the system of rocking of available inertia variable two more rocks system, simulates the multistage torsional oscillation situation of actual axle system more accurately.
The torsional excitation device of this Laboratory Furniture also can be used as a kind of general torsional excitation source and directly acts on mechanical structure and various systems, so that actual engineering structure is carried out dynamic analysis.
Claims (7)
1, a kind of by speed-adjustable motor, the internal combustion engine shafting torsion analogy Laboratory Furniture that tachometer, electronics torsiograph, oscillograph recording instrument constitute is characterized in that two ends that rock system [3] of inertia variable are connected with a motor exciting bank by variable-frequency power sources [30] control.
2, the described internal combustion engine shafting torsion analogy of a kind of claim 1 Laboratory Furniture is characterized in that variable-frequency power sources circuit (30) comprises a parallel single-phase inverter circuit (28) and a flip-flop circuit (29).
3, the described shafting torsional oscillation simulated experiment platform of a kind of claim 1, it is characterized in that this Laboratory Furniture torsional oscillation motor (16) can as excitation source directly and practical structures join.
4, the described internal combustion engine shafting torsion analogy of a kind of claim 1 Laboratory Furniture, it is characterized in that inertia variable is two rocks system (13) and at its a end a removable flywheel (15) is housed, and its other end is by adorning a continuously adjustable inertia variable fly wheel device (10).
5, the described internal-combustion engine torsion analogy of a kind of claim 4 Laboratory Furniture, it is characterized in that but the flywheel gear (10) of modulation inertia comprises an adjustable flywheel that is divided into three sector units continuously, side at sector unit is processed with guiding groove, can slide along three guiding footpaths on the disk (11) that is fixed on the axle, opposite side is processed with the rotatable disc (12) of gradually opening screw thread by screw thread and and cooperates, regulate rolling disc, three sector units that can make adjustable flywheel are along separately guiding groove radial variation equidistantly.
6, the described internal-combustion engine torsion analogy of a kind of claim 3 Laboratory Furniture, it is characterized in that becoming the two systems of rocking of inertia can substitute with a system of rocking that becomes inertia more, with the multistage torsional oscillation situation of simulation actual axle system.
7, the described internal-combustion engine torsion analogy of a kind of claim 1 Laboratory Furniture is characterized in that the motor exciting bank comprises to drag electric rotating machine, torsional oscillation motor (16) and variable-frequency power sources.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89202633 CN2044647U (en) | 1989-03-15 | 1989-03-15 | Experimental platform for simulating torsion in axle series of internal-combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89202633 CN2044647U (en) | 1989-03-15 | 1989-03-15 | Experimental platform for simulating torsion in axle series of internal-combustion engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2044647U true CN2044647U (en) | 1989-09-20 |
Family
ID=4860337
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 89202633 Withdrawn CN2044647U (en) | 1989-03-15 | 1989-03-15 | Experimental platform for simulating torsion in axle series of internal-combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2044647U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100374216C (en) * | 2005-09-21 | 2008-03-12 | 天津大学 | Rotor axial system torsional activator |
| CN102967453A (en) * | 2012-11-09 | 2013-03-13 | 中北大学 | Rotor test bed with online torque excitation and torque measurement function |
| CN106763487A (en) * | 2016-12-21 | 2017-05-31 | 福州麦辽自动化设备有限公司 | A kind of flywheel buffer gear of multi-line |
| CN107255512A (en) * | 2017-07-18 | 2017-10-17 | 攀枝花学院 | Detection method for verifying rod member resonant frequency |
| CN108303261A (en) * | 2018-01-15 | 2018-07-20 | 武汉理工大学 | A kind of magneto-electric torsional vibration damper test-bed based on laser measurement technology |
| US11505063B2 (en) | 2018-05-30 | 2022-11-22 | Carrier Corporation | Energy management systems (EMS) for transportation refrigeration units (TRU) |
-
1989
- 1989-03-15 CN CN 89202633 patent/CN2044647U/en not_active Withdrawn
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100374216C (en) * | 2005-09-21 | 2008-03-12 | 天津大学 | Rotor axial system torsional activator |
| CN102967453A (en) * | 2012-11-09 | 2013-03-13 | 中北大学 | Rotor test bed with online torque excitation and torque measurement function |
| CN102967453B (en) * | 2012-11-09 | 2015-06-10 | 中北大学 | Rotor test bed with online torque excitation and torque measurement function |
| CN106763487A (en) * | 2016-12-21 | 2017-05-31 | 福州麦辽自动化设备有限公司 | A kind of flywheel buffer gear of multi-line |
| CN106763487B (en) * | 2016-12-21 | 2019-02-15 | 桐乡市瑞远纺织有限公司 | A kind of flywheel buffer gear of multi-line |
| CN107255512A (en) * | 2017-07-18 | 2017-10-17 | 攀枝花学院 | Detection method for verifying rod member resonant frequency |
| CN108303261A (en) * | 2018-01-15 | 2018-07-20 | 武汉理工大学 | A kind of magneto-electric torsional vibration damper test-bed based on laser measurement technology |
| US11505063B2 (en) | 2018-05-30 | 2022-11-22 | Carrier Corporation | Energy management systems (EMS) for transportation refrigeration units (TRU) |
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| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| RN01 | Renewal of patent term | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |