CN208091610U - A kind of redundant structure shafting load distribution tester - Google Patents
A kind of redundant structure shafting load distribution tester Download PDFInfo
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- CN208091610U CN208091610U CN201820257130.7U CN201820257130U CN208091610U CN 208091610 U CN208091610 U CN 208091610U CN 201820257130 U CN201820257130 U CN 201820257130U CN 208091610 U CN208091610 U CN 208091610U
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- 238000009826 distribution Methods 0.000 title claims abstract description 35
- 238000004458 analytical method Methods 0.000 claims abstract description 14
- 230000005540 biological transmission Effects 0.000 claims abstract description 5
- 238000000034 method Methods 0.000 claims description 9
- 230000008569 process Effects 0.000 claims description 3
- 238000012546 transfer Methods 0.000 claims description 3
- 230000003750 conditioning effect Effects 0.000 claims description 2
- 238000005452 bending Methods 0.000 description 10
- 230000008878 coupling Effects 0.000 description 6
- 238000010168 coupling process Methods 0.000 description 6
- 238000005859 coupling reaction Methods 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- 238000000605 extraction Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000013467 fragmentation Methods 0.000 description 1
- 238000006062 fragmentation reaction Methods 0.000 description 1
- 230000009347 mechanical transmission Effects 0.000 description 1
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Abstract
Redundant structure shafting load distribution tester provided by the utility model includes the moment of flexure measuring instrument for being used for measuring moment of flexure being arranged on being distributed in several moment of flexure measuring points on tested shaft surface；For measuring the rotation-speed measuring device of measured axis；It is connected and carries out the moment of flexure information and rotary speed information that measure the wireless signal transmitting device of distance transmission with above-mentioned moment of flexure measuring instrument；For receiving the signal pickup assembly of moment of flexure information and rotary speed information that above-mentioned wireless signal transmitting device emits；And the information analysis processor for being handled the moment of flexure information and rotary speed information.A kind of redundant structure shafting load distribution tester provided by the utility model, it is proposed that a kind of redundant structure shafting load distribution tester, the load distribution that can be tested under the practical connection status of shafting without disassembling shafting have popularization practical value very much.
Description
Technical field
The utility model patent is related to a kind of load measurement instrument, more particularly to a kind of for testing redundant structure shafting
Load distribution load distribution tester, it can be applied to power, metallurgy, chemical industry, ship etc. is had by what more rotors formed
The large rotating machinery field of redundant structure.
Background technology
In mechanical transmission mechanism, shafting misalign be cause steam-electric generating set shafting vibrate most common failure it
One.Shafting is misaligned to be misaligned including coupling misalignment and bearing.It refers to since bearing dynamical height changes that its middle (center) bearing, which misaligns,
Caused load off-design value, causes shafting load distribution unreasonable.Loading ability of bearing is overweight, can cause oil temperature Gao Wawengao,
Lead to coal fragmentation；Carrying kicks the beam, and can cause oil whirl, this can all influence the stability of entire shafting, to influence unit
Safe and stable operation.
Modern large turbine-generator set is the overlength statically indeterminate system being made of more rotor multiple bearings, shafting load point
It is found out with situation because being influenced directly to calculate by factors such as bearing dynamical heights.Also lack relevant shafting load on the market at present
Allocation for test instrument.
Conduct oneself with dignity in shaft part, shaft coupling, impeller, under the action of the additional components such as blade, shafting will produce elastic bending deflection.
Under different load distributions, rotor elastic bending deflection is different, and each section turn moment distribution situation is also different.Therefore, lead to
Cross the section turn moment for measuring shaft, you can the load distribution situation of anti-push shaft system.
Invention content
The purpose of this utility model is to provide a kind of redundant structure shafting load distribution tester, it has test method
Simple and efficient, high certainty of measurement, it is highly practical the advantages that, the load distribution under the practical connection status of shafting can be tested.
In order to realize the purpose of above-mentioned utility model, a kind of redundant structure shafting load distribution test of the utility model
Instrument includes：
What is be arranged on being distributed in several moment of flexure measuring points on tested shaft surface is used for measuring the moment of flexure measuring instrument of moment of flexure；
For measuring the rotation-speed measuring device of measured axis；
It is connected and carries out the moment of flexure information and rotary speed information that measure the nothing of distance transmission with above-mentioned moment of flexure measuring instrument
Line sender unit；
For receiving the signal pickup assembly of moment of flexure information and rotary speed information that above-mentioned wireless signal transmitting device emits；With
And
For the information analysis processor handled the moment of flexure information and rotary speed information.
The number of moment of flexure measuring point described further can subtract 2 to determine by the number of bearings being tested in shaft.
The rotation-speed measuring device includes：
Expose in tested shaft and reflecting strips are set near shaft part；And
The photoelectric sensor of the one alignment reflecting strips, in the tested shaft rotation process, the reflecting strips are passed through
When the photoelectric sensor, the sensor exports series of pulses signal, the pulse signal after Signal transfer box conditioning,
Outputting standard TTL rotational speed pulse signals.
Described information analysis processor is established according to the position of the shafting structure and the moment of flexure point layout of tested shaft
One shafting finite element analysis model, and corresponding power and torque equilibrium equation computing module are established to calculate shafting load distribution.
Under a kind of redundant structure shafting load distribution tester provided by the utility model has the following advantages and reaches
Row technique effect：
(1) a kind of redundant structure shafting load distribution tester is proposed, shafting reality can be tested without disassembling shafting
Load distribution under the connection status of border；
(2) tester can be directed to entire shafting carry out load distribution test analysis, also can individually to target bearing into
Row test；
(3) it is suitable for the redundant structure shafting of different supporting types, flexibility is high；
(4) only a small amount of moment of flexure measuring point need to be arranged in section near shaft coupling, without taking off cylinder, workload is small；
(5) it dehisces to reflect that shafting load distribution situation, the device are measured with difference of height by shaft coupling relative to tradition
As a result more directly, more controllably.
It can be seen that redundant structure shafting load distribution tester provided by the utility model has the practical valence of popularization very much
Value.
Description of the drawings
Fig. 1 is the utility model load distribution tester；
Fig. 2 is that the tester of one embodiment of the utility model detects 1000MW Balancing of Steam Turbine Shaft structural schematic diagrams；
Fig. 3 is the wiring schematic diagram of moment of flexure measuring point；
Fig. 4 surveys section dynamic bending moment signal schematic representation by the utility model tester；
Survey tach signals of the Fig. 5 by the utility model tester；
Fig. 6 is the present embodiment shafting finite element analysis model；
Fig. 7 is the utility model method flow diagram；
Drawing reference numeral and form tags explanation：
1-1# bearings；2-high pressure rotors；3-1# moment of flexure measuring points；4-2# bearings；5-middle pressure rotors；6-2# moments of flexure are surveyed
Point；7-3# bearings；8-low pressure rotors I；9-3# moment of flexure measuring points；10-4# bearings；11-shaft couplings；12-low pressure (LP) cylinders II；
13-5# bearings；
Table 1 surveys each moment of flexure measuring point section turn moment by the present embodiment；
Table 2 surveys shafting load distribution result by the present embodiment.
Specific implementation mode
The embodiments of the present invention are described in detail below in conjunction with the accompanying drawings, so that those skilled in the art can
Better understand the technique effect of the technical characteristics of the utility model.
Referring to Fig. 1, the redundant structure shafting load distribution tester of the utility model includes moment of flexure measuring instrument 101, turns
Speed measuring device 102, signal pickup assembly 104 and information analysis processor 105.Wherein, the setting of moment of flexure measuring instrument 101 is being distributed
It is used for measuring moment of flexure on several moment of flexure measuring points on tested 100 surface of shaft；Rotation-speed measuring device 102 is used for measuring tested
The rotating speed of axis 100；The moment of flexure information and rotating speed that wireless signal transmitting device 103 is connected with above-mentioned moment of flexure measuring instrument and will measure
Information carries out distance transmission；Signal pickup assembly 104 is used for receiving the moment of flexure information of above-mentioned wireless signal transmitting device transmitting
And rotary speed information；Information analysis processor 105 is used for handling the moment of flexure information and rotary speed information.
Referring to Fig. 2, by taking 1000MW steam-electric generating set shaftings as an example, shafting load distribution test is carried out.Due to live item
Part limits, and the present embodiment is surveyed shafting just for steam turbine and is tested.As shown in Fig. 2, being provided with 1# bearings 1, height in shafting
Rotor 2,1# moments of flexure measuring point 3,2# bearings 4, middle pressure rotor 5,2# moments of flexure measuring point 6,3# bearings 7, low pressure rotor I 8,3# moments of flexure is pressed to survey
Point 9,4# bearings 10, shaft coupling 11, low pressure (LP) cylinder II 12 and 5# bearings 13；With reference to the accompanying drawings and examples to the utility model
Specific implementation mode be described in further detail.
First, according to the operability situation of the design feature of shafting and site space, moment of flexure measure-point amount and position are determined
P (see Fig. 1) is set, and arranges moment of flexure measuring point, as shown in Fig. 2, wherein the number of moment of flexure measuring point can subtract 2 to determine by number of bearings.
As shown in figure 3, measuring dynamic bending moment signal T of the shafting under low speed state using full-bridge method0(t).Referring back to Fig. 1, in quilt
It surveys the exposing shaft part of shaft 100 and nearby pastes reflecting strips 121, photoelectric sensor 122 is directed at reflecting strips 121.Equipment rotation is (tested
Shaft 100 rotates) during, when reflecting strips 121 are by photoelectric sensor, sensor 122 exports series of pulses signal, pulse letter
Number after Signal transfer box improves, outputting standard TTL rotational speed pulse signals.As shown in Fig. 1, collected dynamic bending moment signal
It is linked into wireless signal transmitting device 103 with tach signal, the reception work of wireless signal is realized using radio network gateway, and is passed through
USB port is linked into computer, realizes transmission and the storage work of wireless signal.Believed according to surveyed dynamic bending moment signal and rotating speed
Number, as shown in figures 4 and 5, moment of flexure signal T of the extraction measurement section in vertical direction⊥(t).Then according to shafting structure
With moment of flexure point layout position, shafting finite element analysis model is established, as shown in Fig. 6, and it is flat to work out corresponding power and torque
Weigh equation calculation program, calculates shafting load distribution.
Referring to Fig. 7, the redundant structure shafting load distribution tester of the utility model, it is characterised in that at information analysis
Reason device 105 is taken such as under type：
(1) according to surveyed dynamic bending moment signal and tach signal, as shown in figures 4 and 5, extraction measures section perpendicular
Histogram to moment of flexure signal；
(2) according to shafting structure and moment of flexure point layout position, shafting finite element analysis model is established, as shown in Fig. 6；
(3) corresponding calculation procedure is worked out according to power and torque equilibrium equation, calculates shafting load distribution.
As shown in Fig. 2, according to shafting structure feature and site space situations such as, determine required moment of flexure measure-point amount and
Position, and arrange moment of flexure measuring point, wherein number=number of bearings -2 of moment of flexure measuring point.
As shown in figure 3, measuring the dynamic bending moment signal T under the shafting slow-speed of revolution using full-bridge method0(t), surveyed dynamic bending moment
Signal is as shown in Fig. 3.
According to surveyed dynamic bending moment signal and tach signal, respectively as shown in figures 4 and 5, extraction measures section and exists
The moment of flexure signal T of vertical direction⊥(t), surveyed T⊥(t) the results are shown in Table 1.
| Measuring point serial number | Moment of flexure (N ﹒ m) |
| 1# | -3882 |
| 2# | -121611 |
| 3# | 17241 |
Table 1
According to shafting structure and moment of flexure point layout position, shafting finite element model is established, as shown in Fig. 6；
According to power and torque equilibrium equation, shafting load distribution is calculated, measured result is as shown in table 2.
| Bearing serial number | 1# | 2# | 3# | 4# | 5# |
| Surveyed load (103Kg) | 7.28 | 22.80 | 66.24 | 98.68 | 46.93 |
Table 2
The measured result is very consistent with producer recommended value, there is very much application value.
Finally it should be noted that above example is merely intended for describing the technical solutions of the present application, but not for limiting the present application.Although
The utility model is described in detail with reference to embodiment, it will be understood by those of ordinary skill in the art that, it is new to this practicality
The technical solution of type is modified or replaced equivalently, without departure from the spirit and scope of technical solutions of the utility model,
It should cover in the right of the utility model.
Claims (4)
1. a kind of redundant structure shafting load distribution tester, which is characterized in that including：
What is be arranged on being distributed in several moment of flexure measuring points on tested shaft surface is used for measuring the moment of flexure measuring instrument of moment of flexure；
For measuring the rotation-speed measuring device of measured axis；
It is connected and carries out the moment of flexure information and rotary speed information that measure the wireless communication of distance transmission with above-mentioned moment of flexure measuring instrument
Number emitter；
For receiving the signal pickup assembly of moment of flexure information and rotary speed information that above-mentioned wireless signal transmitting device emits；And
For the information analysis processor handled the moment of flexure information and rotary speed information.
2. redundant structure shafting load distribution tester as described in claim 1, which is characterized in that the moment of flexure measuring point
Number can subtract 2 to determine by the number of bearings being tested in shaft.
3. redundant structure shafting load distribution tester as described in claim 1, which is characterized in that the tachometric survey dress
Set including：
Expose in tested shaft and reflecting strips are set near shaft part；And
The photoelectric sensor of the one alignment reflecting strips, in the tested shaft rotation process, described in the reflecting strips process
When photoelectric sensor, the sensor exports series of pulses signal, and the pulse signal is after Signal transfer box conditioning, output
Standard TTL rotational speed pulse signals.
4. redundant structure shafting load distribution tester as described in claim 1, which is characterized in that at described information analysis
Device is managed according to the position of the shafting structure and the moment of flexure point layout of tested shaft, establishes a shafting finite element analysis model,
And corresponding power and torque equilibrium equation computing module are established to calculate shafting load distribution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820257130.7U CN208091610U (en) | 2018-02-13 | 2018-02-13 | A kind of redundant structure shafting load distribution tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820257130.7U CN208091610U (en) | 2018-02-13 | 2018-02-13 | A kind of redundant structure shafting load distribution tester |
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| Publication Number | Publication Date |
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| CN208091610U true CN208091610U (en) | 2018-11-13 |
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| CN201820257130.7U Expired - Fee Related CN208091610U (en) | 2018-02-13 | 2018-02-13 | A kind of redundant structure shafting load distribution tester |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112487578A (en) * | 2020-11-27 | 2021-03-12 | 上海电气电站设备有限公司 | Method for improving support rigidity of large-scale steam turbine generator and reducing vibration response |
-
2018
- 2018-02-13 CN CN201820257130.7U patent/CN208091610U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112487578A (en) * | 2020-11-27 | 2021-03-12 | 上海电气电站设备有限公司 | Method for improving support rigidity of large-scale steam turbine generator and reducing vibration response |
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Granted publication date: 20181113 |
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| CF01 | Termination of patent right due to non-payment of annual fee |