CN206399621U - Energy shafting torsional oscillation test system - Google Patents
Energy shafting torsional oscillation test system Download PDFInfo
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- CN206399621U CN206399621U CN201621415163.7U CN201621415163U CN206399621U CN 206399621 U CN206399621 U CN 206399621U CN 201621415163 U CN201621415163 U CN 201621415163U CN 206399621 U CN206399621 U CN 206399621U
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- torsional oscillation
- test system
- energy
- torsional
- shafting
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Abstract
Energy shafting torsional oscillation test system, including frequency converter, it is controlled by the frequency control motor of frequency converter work, the double feedback electric engine linked with frequency control motor, the rotor-side converter and net side current transformer that double feedback electric engine is connected to the grid, torsional vibration signal acquisition component and the torsional oscillation monitoring test system for connecting torsional vibration signal acquisition component, wherein, some link gears to be measured are connected between frequency control motor and double feedback electric engine, the torsional vibration signal acquisition component is used for the torsional oscillation information for detecting link gear to be measured, the torsional oscillation monitoring test system is used to receive and show torsional oscillation information, with the effect that can realize the torsional oscillation test to the various exciting factors of various link gears under circumstances.
Description
Technical field
The utility model is related to torsional vibration of shafting field, more particularly to energy shafting torsional oscillation test system.
Background technology
The twisting vibration of rotating machinery shafting（Hereinafter referred to as torsional oscillation）The problem of being a generally existing and serious harm, it is
A kind of special vibration mode, is substantially due to the not absolute rigid body of shafting, there is elasticity to a certain extent, thus with
In the rotary course of average speed, the wink of different size, out of phase can be produced between each elastomeric element because of a variety of causes
Shi Sudu fluctuating, forms the twisting back and forth along direction of rotation.Image it may be considered that between rotating machinery elastomeric element
Because the effect of inertia generates the reaction force of the opposite opposite direction of variation tendency, so that as turning round fried dough twist, to elastic portion
Part forms similar active force.Obvious this torsional oscillation will cause the tangential alternation torsional stress of material internal.If torsion is excessive, cut
Shearing stress exceedes elastic limit, and material will produce fatigue accumulation.When fatigue accumulation is to the life-span, material will start to split
Line, crackle gradually develops, and the serious accident of Materials Fracture is caused at last.This equipment important to some, such as large-scale steamer generate electricity
Consequence and loss produced by machine, large ship, locomotive, large-scale steel rolling equipment etc. are all hardly imaginable, inestimable.
The main feature of shafting torsional oscillation：
（1）Generality：The shafting of the more complicated rotating machinery of every relatively large, structure it is all more or less or strong or weak or
Continue or briefly occur torsional oscillation.It may also may be caused machinery due to electrically aspect；It is probably derived from dynamic
Power, it is also possible to any erratic process in terms of load；It is probably to be shaken due to being forced caused by the excitation moment of alternation
Swing, it is also possible to be due to free oscillation caused by step or pulse excitation.It vibrates unlike general bending, as long as from machinery side
Face is set about, and have found its defect such as uneven, asymmetric, and vibration is eliminated the need for.
（2）Latency：The torsional oscillation of shafting is of short duration process caused by various interference mostly（Certainly also there is the dry of continuous action
Continuation forced oscillation caused by disturbing, the sub-synchronous oscillation of such as steam turbine generator, due to the negative phase-sequence of three-phase load unbalance formation
Torsional oscillation of two times of mains frequencies etc. caused by electric current）, it is usually to find without special delivering polarization monitoring instrument.Cause " dark
Wound " is also difficult to perceive out.In addition, torsional oscillation often causes the vibration of other forms, this just can more cover its presence, and draw
Play erroneous judgement.
（3）Accident it is sudden：As long as the enhancing of the fatigue accumulation that torsional oscillation is caused again and again, crackle, otch are formed, and
Gradually spread, the fracture and collapse of shafting will be caused one day.And may have no disease before this, or be difficult to be therefore easily perceived by humans
Out.
（4）The seriousness of accident：After accident outburst, its consequence is all often destructive serious accident, is lost extremely miserable
Weight.
As can be seen here, can also be together with other failures be obscured, although it is fairly common due to the latency that torsional oscillation endangers
Presence, but still ignored by many people, do not discover, do not understand, do not recognized.Even if having had resulted in destruction, it is also difficult to understand fully
Whether generate torsional oscillation in long-term running actually, and how to accumulate, this is also that the items of torsional oscillation are studied into
The major reason that fruit is difficult to be understood and promoted.
Utility model content
The purpose of this utility model is to provide a kind of energy shafting torsional oscillation test system, with can be in various environment
The lower effect for realizing the torsional vibration signals test to various link gears under all kinds of exciting factors.
Above-mentioned purpose of the present utility model technical scheme is that：
Energy shafting torsional oscillation test system, including frequency converter, be controlled by frequency converter work frequency control motor, with become
The double feedback electric engine of frequency modulation speed motor linkage, the rotor-side converter that double feedback electric engine is connected to the grid and net side current transformer, torsional oscillation letter
Number acquisition component and the torsional oscillation monitoring test system for connecting torsional vibration signal acquisition component, wherein, frequency control motor and double-fed
Some link gears to be measured are connected between motor, the torsional vibration signal acquisition component is used for the torsional oscillation for detecting link gear to be measured
Information, the torsional oscillation monitoring test system is used to receive and show torsional oscillation information.
By using above-mentioned technical proposal, stepless time adjustment is realized by way of frequency converter plus frequency control motor, from
And the torsional oscillation situation of link gear to be measured at various speeds is controlled, system is connected by the setting of double feedback electric engine with power network, can
So that systematic research is further extended to the relative influence between torsional oscillation and power network, torsional oscillation acquisition component is used for to be detected
The torsional oscillation information of motivation structure carries out collection in real time and the torsional oscillation information transmission collected is monitored into test system to torsional oscillation.
Further, the energy shafting torsional oscillation test system also include channel steel base, the frequency control motor with
Double feedback electric engine is fixedly installed in the channel steel base.
By using above-mentioned technical proposal, the work of support frequency control motor and double feedback electric engine is played in the setting of channel steel base
With.
Further, it is provided with Rubber shock-absorbing pad below the channel steel base.
By using above-mentioned technical proposal, it can further reduce the vibration of system by rubber damper, and can be with
The combination that system and grade level is adjusted flexibly is handled, by highly being adjusted to rubber damper, can also ground foundation simulation injustice
In the case of, the influence to torsional oscillation.
Further, the link gear to be measured includes link gear, variable transmission mechanism and power transmission shaft.
By using above-mentioned technical proposal, the torsional oscillation of link gear, variable transmission mechanism and power transmission shaft can be examined
Survey.
Further, the link gear includes shaft coupling.
Further, the variable transmission mechanism includes gear-box.
Further, the torsional vibration signal acquisition component including pulse test the speed class encoder and analog torsional oscillation class sensing
Device.
Further, the pulse test the speed class encoder including gear sensor, photoelectric encoder, laser sensor and
At least one in Hall sensor.
By using above-mentioned technical proposal, pass through gear sensor, photoelectric encoder, laser sensor and hall sensing
Device can be realized and various parameters are measured.
Further, analog torsional oscillation class sensor includes torque sensor, torsional stress strain-ga(u)ge transducer and rotation
At least one in transformer.
Further, torsional vibration signal acquisition component and torsional oscillation monitor test system by RS232 buses, usb bus and
Industry ethernet at least one connection.
By using above-mentioned technical proposal, the transmission of diversification data is realized.
In summary, the utility model has the advantages that：
1st, energy exciting
By double feedback electric engine, rotor-side converter, net side current transformer, test system load can be adjusted flexibly, by turning
The control of sub- side converter and net side current transformer, can simulate various torsional excitations.It is especially suitable for torsional oscillation in double-fed wind power system
The research of excitation, also is adapted for studying research of the electromechanical resonance to electric network influencing.
2nd, frequency control exciting
By frequency converter and frequency control motor, the various rotating speed Scene Simulations of system are realized, by Frequency Converter Control energy
Transmission, speed governing, the control of exciting are realized, exciting mode is simple, cost is low, noise is low, do not wear and tear, easy to control, consumption is small
3rd, symmetrical structure
Frequency control motor and double feedback electric engine in the system, can rise Wound-rotor asynchronous induction machine using both-end axle,
So practical structures are exactly full symmetric, and drive end can be exchanged with load end, and frequency converter can be using four as limit frequency converter, knot
Structure is also symmetrical with rotor-side converter in current system and stator side converter, and this symmetrical structure strengthens system can
Autgmentability.
4th, can detachable type structure
The system more comprehensively considers current primary drive, connecting shaft, supporting way, and each fulcrum can be replaced fixed
System, so as to complete the torsional oscillation test of each fulcrum.For example gear-box torsion can be carried out by gear-box variable transmission mechanism
The resonance point that shakes is tested, if gear case transmission mechanism is replaced with into belt pulley or liquid pump transmission device is replaced with, you can completion is replaced
Torsional oscillation test and the research of changing device, can carry out shaft coupling torsional oscillation test by coupling body, can be entered by Bearning mechanism
Row Bearning mechanism torsional oscillation is tested.
5th, Centralized Monitoring
By Centralized Monitoring can realize by frequency converter, the adjustable damping at frequency control motor end, double feedback electric engine rotor
Current transformer and the combination of the damping adjustment of net side current transformer and expandable portion are controlled, and can realize Torsional vibration, torsional angle, machine
The accurate control of tool damping.
Brief description of the drawings
Fig. 1 is energy shafting torsional oscillation test system composition figure.
In figure, 1, base；2nd, rubber damper；3rd, frequency control motor；4th, double feedback electric engine；5th, frequency converter；6th, torsional oscillation is believed
Number collector；7th, rotor-side converter；8th, net side current transformer；9th, torsional oscillation monitoring test system；10th, switching switch；11st, adjustable electric
Resistance；12nd, current source；13rd, shaft coupling；14th, bearing；15th, gear-box；16th, sensor；17th, power transmission shaft.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing.
Shown in reference picture 1, energy shafting torsional oscillation test system include base 1, frequency converter 5, be arranged on base 1 and by
The frequency control motor 3 worked in frequency converter 5 is controlled, the double feedback electric engine 4 linked on base 1 with frequency control motor 3 is arranged on, sets
Put some link gears to be measured between frequency control motor 3 and double feedback electric engine 4, for detecting some link gears to be measured
Torsional vibration signal acquisition component, the rotor-side converter 7 that double feedback electric engine 4 is connected to the grid and net side current transformer 8 and torsional oscillation monitoring
Test system 9, wherein,
The lower section of base 1 is provided with rubber damper 2, can further reduce the vibration of system by rubber damper 2,
And the combination that system and grade level can be adjusted flexibly is handled, and by highly being adjusted to rubber damper 2, can also be simulated
In the case that ground is uneven, the influence to torsional oscillation.
Channel steel base 1, is the mounting seat 1 of system, according to the actual design of system, it is necessary to reserving installation hole and installation position
Put, convenient fixed frequency control motor 3 and double feedback electric engine 4.
Frequency control motor 3, can use both-end shaft extension wound induction motor, can thus form symmetrical structure, side
Just system extends, and major function is that the electrodeless variable-speed for carrying out system by the frequency converter 5 with being connect drives, frequency control motor 3
Motor side can also add the mechanisms such as quality disk, or stage clip or hydraulic pressure, so as to adjust the mechanical damping of system.
Frequency converter 5, for realizing the frequency control of unit, according to four-quadrant frequency converter 5, then realizes pair of control section
Claim structure.
Rotor-side converter 7 and stator side converter, for the excitation con-trol of double feedback electric engine, and rotor-side converter 7
With stator side converter cooperating, energy in bidirectional flow is realized.When the subsynchronous operation of motor, power network is to rotor input energy
Amount, rotor-side converter 7 operates in inverter mode, and net side current transformer 8 operates in rectification state；When the supersynchronous operation of motor,
Rotor exports energy to power network, and rotor-side converter 7 makees rectification operation, and net side current transformer 8 makees inverter operation, energy feedback is arrived
Power network；When motor is run simultaneously, power network makees copped wave operation to rotor feed-in DC excitation electric current, rotor-side converter 7.This
Outside, net side current transformer 8 also needs control bus voltage constant, regulation net side power factor, makes the idle of whole wind generator system
Regulation is more flexible.（When the actual speed of generator is less than the synchronous rotary speed n of stator field, generator is in secondary same
Leg speed degree is run；When the actual speed of generator is equal to the synchronous rotary speed n of stator field, generator is in synchronizing speed
Operation；When the actual speed of generator is higher than the synchronous rotary speed n of stator field, generator is transported in supersynchronous speed
OK.）
Link gear to be measured includes shaft coupling 13, gear-box 15, bearing 14 and power transmission shaft 17, wherein, shaft coupling 13 can
Connection parts are replaced with, gear-box 15 could alternatively be variable transmission mechanism to be measured, and power transmission shaft 17 could alternatively be biography to be measured
Moving axis 17, during system oneself framework, generally requires elongated power transmission shaft 17, to be more easy to adjust torsional vibration excitation.
Signal acquisition component includes several sensor 16 and torsional vibration signal acquisition device 6, and torsional vibration signal acquisition device 6 is used to adopt
Each in collecting system has gear sensor 16, photoelectric coding with the receivable sensor 16 of torsional vibration signals for surveying link gear
The major pulses such as device, laser sensor 16, Hall sensor 16 test the speed the encoder of class, can also receive torque sensor 16,
The analog signals such as torsional stress strain-ga(u)ge transducer 16, rotary transformer, switch to data signal by torsional oscillation on-site signal and are transmitted to collection
Middle monitoring system, the connecting mode with centralized monitoring system can support RS232 buses, usb bus, industry ethernet.
Torsional oscillation monitoring test system 9 is connected with torsional vibration signal acquisition device 6, obtains the signals such as torsional oscillation, rotating speed, moment of torsion.With change
Frequency device 5 is connected, and frequency converter 5 is controlled, and can simulate complicated speed change exciting situation.With rotor-side converter 7, net side unsteady flow
Device 8 is connected, and can simulate complex load change exciting situation, and the relative influence between torsional oscillation and power network.The torsional oscillation is monitored
Switching switch 10 that test system 9 is also connected with being arranged between double feedback electric engine 4 and torque monitoring test system, adjustable resistance 11,
Current source 12 is connected, and can change exciting situation with fictitious load so that system is properly cut according to actual conditions.
This specific embodiment is only to explain of the present utility model, and it is not to limitation of the present utility model, ability
Field technique personnel can make the modification without creative contribution to the present embodiment as needed after this specification is read, but
As long as all being protected in right of the present utility model by Patent Law.
Claims (10)
1. energy shafting torsional oscillation test system, it is characterised in that：Including frequency converter (5), it is controlled by the change that frequency converter (5) works
Frequency modulation speed motor (3), the double feedback electric engine (4) linked with frequency control motor (3), the rotor that double feedback electric engine (4) is connected to the grid
Side converter (7) and net side current transformer (8), torsional vibration signal acquisition component and the torsional oscillation monitoring for connecting torsional vibration signal acquisition component
Test system (9), wherein, some link gears to be measured are connected between frequency control motor (3) and double feedback electric engine (4), it is described
Torsional vibration signal acquisition component is used for the torsional oscillation information for detecting link gear to be measured, and the torsional oscillation monitoring test system (9) is used to connect
Receive and show torsional oscillation information.
2. energy shafting torsional oscillation test system according to claim 1, it is characterised in that：The energy shafting torsional oscillation
Test system also includes channel steel base (1), and the frequency control motor (3) is fixedly installed on the channel-section steel with double feedback electric engine (4)
On base (1).
3. energy shafting torsional oscillation test system according to claim 2, it is characterised in that：The channel steel base (1)
Lower section is provided with rubber damper（2）.
4. energy shafting torsional oscillation test system according to claim 1, it is characterised in that：The link gear bag to be measured
Include link gear, variable transmission mechanism and power transmission shaft (17).
5. energy shafting torsional oscillation test system according to claim 4, it is characterised in that：The link gear includes connection
Axle device (13).
6. energy shafting torsional oscillation test system according to claim 4, it is characterised in that：The variable transmission mechanism bag
Include gear-box (15).
7. energy shafting torsional oscillation test system according to claim 1, it is characterised in that：The torsional vibration signal acquisition group
Part tests the speed class encoder and analog torsional oscillation class sensor including pulse.
8. energy shafting torsional oscillation test system according to claim 7, it is characterised in that：The pulse test the speed class coding
Device includes at least one in gear sensor, photoelectric encoder, laser sensor and Hall sensor.
9. energy shafting torsional oscillation test system according to claim 7, it is characterised in that：Analog torsional oscillation class sensor
Including at least one in torque sensor, torsional stress strain-ga(u)ge transducer and rotary transformer.
10. energy shafting torsional oscillation test system according to claim 1, it is characterised in that：Torsional vibration signal acquisition component
It is connected with torsional oscillation monitoring test system (9) by RS232 buses, usb bus and industry ethernet at least one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621415163.7U CN206399621U (en) | 2016-12-21 | 2016-12-21 | Energy shafting torsional oscillation test system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621415163.7U CN206399621U (en) | 2016-12-21 | 2016-12-21 | Energy shafting torsional oscillation test system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206399621U true CN206399621U (en) | 2017-08-11 |
Family
ID=59512187
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621415163.7U Expired - Fee Related CN206399621U (en) | 2016-12-21 | 2016-12-21 | Energy shafting torsional oscillation test system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206399621U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108225696A (en) * | 2016-12-21 | 2018-06-29 | 南京农业大学 | Energy shafting torsional oscillation tests system |
| CN108426635A (en) * | 2018-03-29 | 2018-08-21 | 中国船舶重工集团公司第七0四研究所 | A kind of high frequency torsional oscillation generating means and control method |
| CN112197985A (en) * | 2020-08-17 | 2021-01-08 | 南方电网调峰调频发电有限公司 | Unit supporting platform for pumped storage dynamic characteristic model test |
-
2016
- 2016-12-21 CN CN201621415163.7U patent/CN206399621U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108225696A (en) * | 2016-12-21 | 2018-06-29 | 南京农业大学 | Energy shafting torsional oscillation tests system |
| CN108225696B (en) * | 2016-12-21 | 2023-06-27 | 南京农业大学 | Energy feedback type shafting torsional vibration testing system |
| CN108426635A (en) * | 2018-03-29 | 2018-08-21 | 中国船舶重工集团公司第七0四研究所 | A kind of high frequency torsional oscillation generating means and control method |
| CN108426635B (en) * | 2018-03-29 | 2024-01-16 | 中国船舶重工集团公司第七0四研究所 | High-frequency torsional vibration generating device and control method |
| CN112197985A (en) * | 2020-08-17 | 2021-01-08 | 南方电网调峰调频发电有限公司 | Unit supporting platform for pumped storage dynamic characteristic model test |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170811 Termination date: 20171221 |
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| CF01 | Termination of patent right due to non-payment of annual fee |