CN105424334B - A kind of test device and method of the shafting torsional oscillation damping effect with cascade structure - Google Patents
A kind of test device and method of the shafting torsional oscillation damping effect with cascade structure Download PDFInfo
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- CN105424334B CN105424334B CN201510750403.2A CN201510750403A CN105424334B CN 105424334 B CN105424334 B CN 105424334B CN 201510750403 A CN201510750403 A CN 201510750403A CN 105424334 B CN105424334 B CN 105424334B
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- shaft
- torsional oscillation
- cylinder
- damping effect
- disturbance component
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H11/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties
- G01H11/06—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties by electric means
Abstract
The test device for the shafting torsional oscillation damping effect with cascade structure that the present invention provides a kind of, including pedestal, pedestal is equipped with shaft seating, shaft one end is set on shaft seating, the shaft other end is equipped with torsional oscillation disturbance component, cylinder is set in the middle part of shaft, and cylinder both sides are respectively equipped with the first inertia wheel disc, the second inertia wheel disc, and measurement module is set between torsional oscillation disturbance component, cylinder；Torsional oscillation disturbance component includes the disturbance component bearing being set in shaft, and for torque handwheel with being located on front side of disturbance component bearing, disturbance component bearing is equipped with fixture block；Measurement module includes sensor stand and stretching block；Sensor stand is set on pedestal, for installing eddy current displacement sensor；Stretch out the same benchmark for being located in shaft, being measured as eddy current displacement sensor of block.The test method for the shafting torsional oscillation damping effect with cascade structure that the present invention also provides a kind of can study different leaves structure, the damping effect of different fluid operating mode shaft torsional oscillation.
Description
Technical field
The present invention relates to steam turbine torsional oscillation experimental system more particularly to a kind of shafting torsional oscillation damping effects with cascade structure
Test device and method.
Background technology
With the development of power industry, Turbo-generator Set single-machine capacity and power density are continuously increased, in addition power transmission network
The high capacity of network, the long diversification away from change and electric load, cause shafting to be easier to that torsional oscillation occurs, are caused to Turbo-generator Set
Fatigue damage is even damaged, to cause serious economic loss even safety accident.Shafting torsional vibration of turbo-generator set is not
It is same as the bending vibration of shafting, it has very strong concealment, is mainly manifested in：Even if can seldom be passed if torsional oscillation amplitude is very big
It is delivered on ground, Field Force is difficult to realize；And once shafting torsional oscillation enhances the degree that can perceive to Field Force, shafting is
It is subjected to damaging.Damping is an important factor for influencing fatigue life of shafting, and size reflects the attenuation state of amplitude, and large-scale
The shafting torsional oscillation of Turbo-generator Set is a kind of small damped harmonic oscillation, once being energized, decaying is very slow.As it can be seen that damped coefficient
Very big on torsional stability influence, it is more important than Mode Shape and modal mass in stability analysis, but it is difficult to calculate
And precision is not high, and on-the-spot test is to obtain the preferable method of torsional oscillation mode damping ratio.
The country is similarly used for the experimental provision with cascade structure of research shafting torsional oscillation damping effect not yet at present.
Invention content
The technical problem to be solved in the present invention is to provide one kind for studying different leaves structure, different fluid operating mode to axis
It is the test device and method of the damping effect of torsional oscillation.
In order to solve the above-mentioned technical problem, the shafting torsional oscillation resistance with cascade structure that the technical solution of the present invention is to provide a kind of
The test device of Buddhist nun's effect, it is characterised in that：Including pedestal, pedestal is equipped with shaft seating, and shaft one end is set to shaft seating
On, the shaft other end be equipped with torsional oscillation disturbance component, cylinder be set to shaft in the middle part of, cylinder both sides be respectively equipped with the first inertia wheel disc,
Second inertia wheel disc, measurement module are set between torsional oscillation disturbance component, cylinder；
Torsional oscillation disturbance component includes the disturbance component bearing being set in shaft, and torque handwheel is same to be located in disturbance component bearing
Front side, disturbance component bearing are equipped with fixture block；
Measurement module includes sensor stand and stretching block；Sensor stand is set on pedestal, for installing current vortex position
Displacement sensor；Stretch out the same benchmark for being located in shaft, being measured as eddy current displacement sensor of block.
Preferably, the disturbance component bearing includes upper disturbance component bearing and lower disturbance component bearing, upper disturbance component
Through-hole after bearing and lower disturbance component support seat cover close is edge of a knife form, and edge of a knife diameter is more than the shaft diameter.
Preferably, the torque handwheel is equipped with fluted disc.
Preferably, the cylinder include cylinder bearing constitute, cylinder bearing be set to pedestal on, be used to support casing top half, under
Cylinder, casing top half, lower cylinder are fitted in the shaft；Casing top half, lower cylinder inner wall are equipped with bushing, and movable vane wheel is set to upper
In shaft in cylinder, lower cylinder, moving blades connect movable vane wheel.
Preferably, it is sealed by gland seal structure between the casing top half, lower cylinder and shaft；Casing top half and lower cylinder
Mating surface between cushioning rubber pad.
Preferably, the cylinder is equipped with air inlet and exhaust port；Intake interface is connect by loading line with fluid source；
Exhaust port installation screws valve.
Preferably, by being keyed on rotor bearing, shaft seating supports in cantilever fashion to be turned the tip of the axis that turns
Axis.
The test method for the shafting torsional oscillation damping effect with cascade structure that the present invention also provides a kind of, it is characterised in that：
Using the test device of the above-mentioned shafting torsional oscillation damping effect with cascade structure, step is：
Step 1：Sensor inspection：
The probe of eddy current displacement sensor is adjusted at a distance from stretching block surface, it is current vortex to make the voltage of the probe
The median of displacement sensor supply voltage；
Step 2：The moving blades of length and shape to be tested are selected for movable vane wheel；
Step 3：The Experimental Flowing Object of setting pressure is filled with into cylinder by fluid source；
Step 4：Rotation torque handwheel, rotating card block to fixture block block the fluted disc on torque handwheel；
Step 5：Unclamp fixture block, the torsion of shaft generating period；The experimental data of shaft torsion is recorded simultaneously；
Step 6：By analyzing experimental data, the torsion attenuation curve of shaft is obtained, and then obtain damped coefficient.
Preferably, in the step 1, pass through the horizontal position for adjusting sensor stand and eddy current displacement sensor
The extension elongation of probe makes in the vertical direction, and electric vortex displacement sensor probe is directed at the stretching block and controls and setting
Distance.
Torsional oscillation disturbance component is arranged in one end of armature spindle in the present invention, and the other end is by being keyed on rotor bearing；
Armature spindle both ends are equipped with inertia wheel disc, and armature spindle central part is provided with cylinder, is filled with the different fluid and work of different pressures value
For the revolution torsional oscillation chamber of leaf grating；There are movable vane wheel, moving blades and bushing in cylinder, different length difference can be replaced on movable vane wheel
The blade of shape can replace the bushing of different-thickness in cylinder.All components of rotor-support-foundation system are erected on pedestal.Damping effect
The test method answered is：So that torque is passed to shaft by torsional oscillation disturbance component and is allowed to do free decaying vibration；By soft
The shaft torsional attenuation curve of part record calculates damped coefficient；The present invention can utilize experiment test different viscosities different densities
The damping effect of fluid shaft torsional oscillation under different torsion frequencies caused by fluid and different leaves structure, different inertia wheel discs
It answers.
Compared with prior art, the invention has the advantages that：
1, rotor-support-foundation system is dragged without driving motor；
2, different fluid viscosity, the damping effect of different fluid pressure, different fluid density countershaft torsional oscillation can be simulated；
3, it is vibrated come the torsional oscillation of drive shaft using torsional oscillation disturbance component；
4, different length and blade of different shapes are replaced, replaces the bushing of different-thickness to form smaller fluid
Chamber；
5, rolling bearing in shaft is not installed, do not introduce other dampings；
6, the through-hole after upper disturbance component bearing and lower disturbance component support seat cover close is edge of a knife form, and edge of a knife diameter is approximately equal to
Shaft diameter not will produce collision in shaft torsional, has minimized the damping capacity occurred in addition to leaf grating and fluid and has dissipated.
Description of the drawings
Fig. 1 is the test device front view of the shafting torsional oscillation damping effect provided in this embodiment with cascade structure；
Fig. 2 is the test device vertical view of the shafting torsional oscillation damping effect provided in this embodiment with cascade structure；
Fig. 3 is torsional oscillation disturbance component main sectional view；
Fig. 4 is torsional oscillation disturbance component side view；
Fig. 5 is the lateral vertical view of torsional oscillation disturbance component；
Fig. 6 is measurement module structural schematic diagram；
Fig. 7 is cylinder structure schematic diagram；
Fig. 8 is the attenuation curve with damping torsional oscillation amplitude.
Specific implementation mode
In order to make the present invention more obvious and understandable, hereby with a preferred embodiment, and attached drawing is coordinated to be described in detail below.
One, the test device of the shafting torsional oscillation damping effect with cascade structure
Subject device is mounted on pedestal 8 combined with Figure 1 and Figure 2, on pedestal 8, is successively from left to right：Torsional oscillation
Disturbance component 1, measurement module 2, the first inertia wheel disc 3-1, cylinder 4, shaft 5, the second inertia wheel disc 3-2, shaft seating 6 are turned round
Shake disturbance component 1, measurement module 2, the first inertia wheel disc 3-1, cylinder 4, the second inertia wheel disc 3-2 is installed in shaft 5, is turned
Axis 5 is mounted on shaft seating 6.
Pedestal is made of concrete pedestal and the spheroidal graphite cast-iron pedestal with dovetail groove, and dovetail groove is torsional oscillation disturbance component, sensing
Device module, shaft seating, cylinder provide the interface for being easily installed and adjusting；Each bearing passes through dovetail slot bolt and pedestal respectively
Connection.
In conjunction with Fig. 3~Fig. 5, torsional oscillation disturbance component 1 is by 1-3 under torque handwheel 1-1, upper disturbance bearing 1-2, lower disturbance bearing
It is constituted with fixture block 1-4；Through-hole after upper disturbance component bearing 1-2 and lower disturbance component bearing 1-3 lids close is edge of a knife form, the edge of a knife
Diameter is more than 5 diameter of shaft.Torque handwheel 1-1 is coaxially mounted on front side of disturbance component bearing 1-2, on upper disturbance bearing 1-2
Equipped with fixture block 1-4；Torque handwheel 1-1 unclamps the torsional oscillation of fixture block 1-4 excitation shafts 5 for generating certain torque.
In conjunction with Fig. 6, measurement module 2 includes sensor stand 7 and stretches out block 2-1, and sensor stand 7 is arranged close to torsional oscillation
The shaft end of disturbance component 1 is fixed on by dovetail grooved screw on pedestal 8, for installing eddy current displacement sensor A；Stretch out block
2-1 stretches out block 2-1 and is fixed on close to the shaft end of torsional oscillation disturbance component 1, as biography by bolt 2-2 with being located in shaft 5
The benchmark that sensor measures.Stretching by adjusting the horizontal position and eddy current displacement sensor A probes of sensor stand 7 is grown
Degree, makes in the vertical direction, and eddy current displacement sensor A alignment probes stretch out block 2-1 and control in suitable distance.
In conjunction with Fig. 7, cylinder 4 is by casing top half 4-1, bushing 4-2, moving blades 4-3, movable vane wheel 4-4, lower cylinder 4-5, cylinder branch
Seat 4-6 is constituted, and cylinder bearing 4-6 is fixed on dovetail slot bolt on pedestal 8, is used to support upper and lower cylinder, casing top half 4-1 and
Lower cylinder 4-5 is fitted in shaft 5, is sealed with gland seal structure between cylinder and shaft 5, casing top half 4-1 and lower vapour
Cushioning rubber pad between the mating surface of cylinder 4-5；Upper and lower cylinder inner wall is equipped with bushing 4-2, and movable vane wheel 4-4 is set in upper and lower cylinder
Shaft on, moving blades 4-3 connection movable vane wheels 4-4.Air inlet and exhaust port are installed on cylinder；Intake interface passes through gas tube
Road 9-2 is connect with fluid source 9-1；Exhaust port installation screws valve.
Cylinder 4 is used to seal the fluid of certain viscosity and certain density, ensures the fluid pressure of fluid cavity by fluid source 9-1
Constant power is specified pressure value.
Movable vane wheel can replace moving blades of different shapes (prismatic blade or twisted blade), be replaced according to length of blade different
The bushing 4-3 of thickness come formed with practical steam turbine similar in fluid cavity.
The rotatable parts of first inertia wheel disc 3-1 and the second inertia wheel disc 3-2 as rotor, wheel disc have different size, more
Change rotating mass of the wheel disc for simulating Steam Turbine.
The end of shaft 5 constrains the rotary freedom of shaft 5 by being keyed on rotor bearing 6；Shaft seating 6 with
Cantilevered fashion supports shaft 5, supports entire rotor-support-foundation system.
Two, the test method of the shafting torsional oscillation damping effect with cascade structure
1, sensor inspection：It adjusts eddy current displacement sensor A probes and stretches out at a distance from the surfaces block 2-1, make probe
Voltage is the median of eddy current displacement sensor supply voltage；(the present embodiment use 24V powered by direct current, probe it is suitable
Voltage value is 11-12V)
2, the blade of certain length definite shape is installed according to experiment condition；
3, the Experimental Flowing Object of certain pressure is filled with into cylinder 4 by fluid source 9-1；
4, rotation torque handwheel 1-1, rotating card block 1-4 block the fluted disc on torque handwheel 1-1 to fixture block 1-4；
5, fixture block 1-4, the torsion of 5 generating period of shaft are unclamped；Record the experimental data that shaft 5 is reversed；
6, it by analyzing experimental data, obtains shaft and reverses attenuation curve, as shown in figure 8, obtaining damped coefficient in turn.
In Fig. 8, A (t) is the torsional oscillation amplitude decayed at any time, and ω is the natural frequency of vibration under undamped, and ξ is damping ratio, and t is
Time, y (t) are torsional oscillation amplitude fading curve, there is the natural frequency of vibration under damping
Correlative study is it has been shown that torsional oscillation amplitude is decayed by geometric progression, and damping ratio ξ values are bigger, then the rate of decay is cured
Soon.In general, if ξ ＜ 0.2,Then haveWherein, yk+1With ykFor by a cycle
Adjacent amplitude.
Generally by surveying torsional oscillation attenuation curve in engineering, and damping ratio ξ is calculated by above-mentioned definition.
Claims (9)
1. a kind of test device of the shafting torsional oscillation damping effect with cascade structure, it is characterised in that：Including pedestal (8), pedestal
(8) it is equipped with shaft seating (6), shaft (5) one end is set on shaft seating (6), and shaft (5) other end is equipped with torsional oscillation disturbance unit
Part (1), cylinder (4) are set in the middle part of shaft (5), and cylinder (4) both sides are respectively equipped with the first inertia wheel disc (3-1), the second flying wheel
Disk (3-2), measurement module (2) are set between torsional oscillation disturbance component (1), cylinder (4)；
Torsional oscillation disturbance component (1) includes the disturbance component bearing being set in shaft (5), and torque handwheel (1-1) is same to be located in disturbance
On front side of parts holder, disturbance component bearing is equipped with fixture block (1-4)；
Measurement module (2) includes sensor stand (7) and stretching block (2-1)；Sensor stand (7) is set on pedestal (8), is used for
Eddy current displacement sensor (A) is installed；Block (2-1) is stretched out with being located in shaft (5), as eddy current displacement sensor (A)
The benchmark of measurement.
2. a kind of test device of the shafting torsional oscillation damping effect with cascade structure as described in claim 1, it is characterised in that：
The disturbance component bearing includes upper disturbance component bearing (1-2) and lower disturbance component bearing (1-3), upper disturbance component bearing
The through-hole of (1-2) and lower disturbance component bearing (1-3) Gai Hehou are edge of a knife form, and edge of a knife diameter is more than the shaft (5) diameter.
3. a kind of test device of the shafting torsional oscillation damping effect with cascade structure as described in claim 1, it is characterised in that：
The torque handwheel (1-1) is equipped with fluted disc.
4. a kind of test device of the shafting torsional oscillation damping effect with cascade structure as described in claim 1, it is characterised in that：
The cylinder (4) includes that cylinder bearing (4-6) is constituted, and cylinder bearing (4-6) is set on pedestal (8), is used to support casing top half (4-
1), lower cylinder (4-5), casing top half (4-1), lower cylinder (4-5) are fitted in the shaft (5)；Casing top half (4-1), under
Cylinder (4-5) inner wall is equipped with bushing (4-2), and movable vane wheel (4-4) is set to casing top half (4-1), in the shaft in lower cylinder (4-5),
Moving blades (4-3) connect movable vane wheel (4-4).
5. a kind of test device of the shafting torsional oscillation damping effect with cascade structure as claimed in claim 4, it is characterised in that：
It is sealed by gland seal structure between the casing top half (4-1), lower cylinder (4-5) and shaft (5)；Casing top half (4-1) and under
Cushioning rubber pad between the mating surface of cylinder (4-5).
6. a kind of test device of the shafting torsional oscillation damping effect with cascade structure as described in claim 1, it is characterised in that：
The cylinder (4) is equipped with air inlet and exhaust port；Intake interface is connect by loading line (9-2) with fluid source (9-1)；Row
The installation of gas interface screws valve.
7. a kind of test device of the shafting torsional oscillation damping effect with cascade structure as described in claim 1, it is characterised in that：
By being keyed on rotor bearing (6), shaft seating (6) supports shaft (5) in cantilever fashion for the end of the shaft (5).
8. a kind of test method of the shafting torsional oscillation damping effect with cascade structure, it is characterised in that：Using such as claim 1 institute
The test device for the shafting torsional oscillation damping effect with cascade structure stated, step are：
Step 1：Sensor inspection：
The probe of eddy current displacement sensor (A) is adjusted at a distance from stretching surface block (2-1), it is electricity to make the voltage of the probe
The median of eddy displacement sensor (A) supply voltage；
Step 2：The moving blades of length and shape to be tested are selected for movable vane wheel；
Step 3：The Experimental Flowing Object of setting pressure is filled with into cylinder (4) by fluid source (9-1)；
Step 4：Rotation torque handwheel (1-1), rotating card block (1-4) block the tooth on torque handwheel (1-1) to fixture block (1-4)
Disk；
Step 5：Unclamp fixture block (1-4), the torsion of shaft (5) generating period；The experimental data of shaft (5) torsion is recorded simultaneously；
Step 6：By analyzing experimental data, the torsion attenuation curve of shaft (5) is obtained, and then obtain damped coefficient.
9. a kind of test method of the shafting torsional oscillation damping effect with cascade structure as claimed in claim 8, it is characterised in that：
In the step 1, pass through the horizontal position of the adjusting sensor stand (7) and stretching for eddy current displacement sensor (A) probe
Go out length, make in the vertical direction, block (2-1) is stretched out described in eddy current displacement sensor (A) alignment probe and control is being set
Distance.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510750403.2A CN105424334B (en) | 2015-11-06 | 2015-11-06 | A kind of test device and method of the shafting torsional oscillation damping effect with cascade structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510750403.2A CN105424334B (en) | 2015-11-06 | 2015-11-06 | A kind of test device and method of the shafting torsional oscillation damping effect with cascade structure |
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| CN105424334A CN105424334A (en) | 2016-03-23 |
| CN105424334B true CN105424334B (en) | 2018-08-17 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109374273A (en) * | 2018-11-02 | 2019-02-22 | 国网浙江省电力有限公司电力科学研究院 | Torsional Vibration of Turbine Generator Rotor and fault simulation multi-function test stand and test method |
| CN112556825B (en) * | 2021-02-22 | 2021-06-15 | 南京航空航天大学 | Complex environment torsional vibration test system and test method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101603855A (en) * | 2009-07-16 | 2009-12-16 | 华北电力大学 | The analytical approach of shafting torsional vibration of turbo-generator set |
| CN102252835A (en) * | 2011-04-13 | 2011-11-23 | 上海朱仕实业有限公司 | Damping testing instrument for damping device of washing machine |
| CN104236881A (en) * | 2014-08-26 | 2014-12-24 | 中国直升机设计研究所 | Rigid damping testing device |
| KR101562492B1 (en) * | 2015-07-22 | 2015-10-22 | (주)오토시스 | The apparatus for vibration monitoring system of power generating equipment and rotor having duplicate function of master contol module |
-
2015
- 2015-11-06 CN CN201510750403.2A patent/CN105424334B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101603855A (en) * | 2009-07-16 | 2009-12-16 | 华北电力大学 | The analytical approach of shafting torsional vibration of turbo-generator set |
| CN102252835A (en) * | 2011-04-13 | 2011-11-23 | 上海朱仕实业有限公司 | Damping testing instrument for damping device of washing machine |
| CN104236881A (en) * | 2014-08-26 | 2014-12-24 | 中国直升机设计研究所 | Rigid damping testing device |
| KR101562492B1 (en) * | 2015-07-22 | 2015-10-22 | (주)오토시스 | The apparatus for vibration monitoring system of power generating equipment and rotor having duplicate function of master contol module |
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