CN109115497A - The method for measuring rotor of turbogenerator set diameter of axle location variation in bearing shell - Google Patents
The method for measuring rotor of turbogenerator set diameter of axle location variation in bearing shell Download PDFInfo
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- CN109115497A CN109115497A CN201811026928.1A CN201811026928A CN109115497A CN 109115497 A CN109115497 A CN 109115497A CN 201811026928 A CN201811026928 A CN 201811026928A CN 109115497 A CN109115497 A CN 109115497A
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- axle
- bearing shell
- diameter
- rotor
- current vortex
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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
- G01M13/04—Bearings
- G01M13/045—Acoustic or vibration analysis
Abstract
The invention discloses a kind of methods for measuring rotor of turbogenerator set diameter of axle location variation in bearing shell, specifically includes the following steps: respectively under Measuring plate car state and when hot X-direction, Y-direction gap voltage, obtain the variable quantity of gap voltage, it further calculates out that the variable quantity and the rotor diameter of axle of cold and hot X, Y-direction current vortex sensor apart from armature spindle diameter distance be vertical, displacement of horizontal direction, then calculates the displacement that can be obtained the rotor diameter of axle in bearing shell and the direction moved in bearing shell.The present invention is easy to implement, measurement is accurate, calculation method science, accurately the variable quantities of different operating condition lower rotor part diameter of axle positions in bearing shell can be calculated by meter, the variable quantity from jiggering rotor diameter of axle position in bearing shell into on-load overall process is grasped, provides the data supporting of science for the adjustment of shaft system of unit absolute altitude.
Description
Technical field
The present invention relates to Turbo-generator Set Vibration test and fault diagnosis technology field, especially a kind of measurement steamer hair
The method of motor group rotor diameter of axle variable quantity.
Background technique
Position of the rotor diameter of axle of thermal power plant's Turbo-generator Set in bearing shell can join with operations such as unit load, vacuum
Several changes and change, if rotor diameter of axle change in location in bearing shell is too big, it is possible that mill watt or abnormal vibration
The case where.Due to when existing measuring instrument and calculation method can only measure and calculate unit cold conditions the rotor diameter of axle in bearing shell
Position, position of the rotor diameter of axle in bearing shell when being unable to measure and calculating hot, therefore when mill watt or abnormal vibration occurs in scene
Dynamic situation, field technician can only by virtue of experience adjust the absolute altitude of bearing, and then reach and change the rotor diameter of axle in bearing shell
Position, come solve the problems, such as mill watt or abnormal vibrations.However, the bearing dynamical height adjustment amount provided by rule of thumb is able to solve mill sometimes
Watt, abnormal vibrations the problems such as, but the numerical value is not optimal numerical value；Sometimes due to using the bearing dynamical height provided by rule of thumb
The case where adjustment amount is unreasonable, not only can't resolve problem using the numerical value, or even there is also problem worse.
Summary of the invention
The technical problem to be solved by the invention is to provide one kind to exist for the on-line measurement rotor of turbogenerator set diameter of axle
The method of location variation in bearing shell.
In order to solve the above technical problems, the technical solution used in the present invention is as follows.
The method for measuring rotor of turbogenerator set diameter of axle location variation in bearing shell, which is characterized in that specifically include
Following steps:
A. in bearing shell radially installed two be mutually perpendicular to, for measure rotor diameter of axle Relative Vibration current vortex sense
Device is respectively defined as X-direction current vortex sensor and Y-direction current vortex sensor；
B. distinguish the gap voltage V of X-direction, Y-direction under Measuring plate car stateX0、VY0；
C. the gap voltage V of X-direction, Y-direction when measurement Turbo-generator Set is hot respectivelyX1、VY1；
D. the variation delta V of cold and hot X, Y-direction gap voltage is calculated separatelyX、ΔVY；
E. cold and hot X, Y-direction current vortex sensor are calculated separately apart from armature spindle span by the variable quantity of gap voltage
From variation delta SX、ΔSY；
F. calculate that the rotor diameter of axle is vertical, displacement S of horizontal direction⊥、S=；
G. displacement S of the rotor diameter of axle in bearing shell is calculatedAlways；
H. the direction that the rotor diameter of axle moves in bearing shell is calculated.
The method of above-mentioned measurement rotor of turbogenerator set diameter of axle location variation in bearing shell uses ten thousand in step B and C
Gap voltage is measured with table or analysis of vibration measurement instrument.
The method of above-mentioned measurement rotor of turbogenerator set diameter of axle location variation in bearing shell, the intermediate gap step D voltage
Variable quantity is calculated using following formula and is obtained:
ΔVX=VX1-VX0
ΔVY=VY1-VY0。
The method of above-mentioned measurement rotor of turbogenerator set diameter of axle location variation in bearing shell, current vortex passes in step E
Variable quantity of the sensor apart from armature spindle diameter distance is calculated using following formula and is obtained:
In formula, S is distance of the current vortex sensor apart from the rotor diameter of axle,
V is current vortex sensor gap voltage,
D is current vortex sensor sensitivity, and the sensitivity of current vortex sensor is 7.87mV/ μm.
The method of above-mentioned measurement rotor of turbogenerator set diameter of axle location variation in bearing shell, the rotor diameter of axle in step F
Vertically, the displacement of horizontal direction is calculated using following formula and is obtained:
SOn=Δ SX*cos45°+ΔSY*cos45°
S==Δ SX*sin45°-ΔSY*sin45°.
The method of above-mentioned measurement rotor of turbogenerator set diameter of axle location variation in bearing shell, the rotor diameter of axle in step G
Displacement S in bearing shellAlwaysIt is calculated and is obtained using following formula:
The method of above-mentioned measurement rotor of turbogenerator set diameter of axle location variation in bearing shell, the rotor diameter of axle in step G
The direction moved in bearing shell is stated using the angle theta with vertical direction, is specifically calculated and is obtained using following formula:
Due to using above technical scheme, the invention technological progress is as follows.
The present invention is easy to implement, measurement is accurate, calculation method science, accurately can calculate different lower turns of operating condition by meter
The variable quantity of sub- diameter of axle position in bearing shell grasps the change from jiggering rotor diameter of axle position in bearing shell into on-load overall process
Change amount provides the data supporting of science for the adjustment of shaft system of unit absolute altitude.The present invention since generator protection measuring point is utilized,
Survey calculation result is reliable；It is carried out in measurement process using the current vortex sensor that unit itself is equipped with, is not required to increase test and sets
It is standby, therefore be not required to additionally increase the investment of any equipment, the hot survey of the rotor diameter of axle can be realized on the basis of existing equipment
Amount.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention.
Wherein: the direction 1.X current vortex sensor, the direction 2.Y current vortex sensor, 3. rotors, 4. bearing shells.
Specific embodiment
Below in conjunction with the drawings and specific embodiments, the present invention will be described in further detail.
A method of measurement rotor of turbogenerator set diameter of axle location variation in bearing shell specifically includes following step
Suddenly.
A. in bearing shell radially installed two be mutually perpendicular to, for measure rotor diameter of axle Relative Vibration current vortex sense
Device is respectively defined as X-direction current vortex sensor and Y-direction current vortex sensor.
In the present embodiment, the position of current vortex sensor is installed as shown in Figure 1, seeing from front to back, 45 ° of left side on bearing shell
The current vortex sensor of installation is defined as X-direction, and the current vortex sensor of the 45 ° of installations in right side is defined as Y-direction.
B. using the gap voltage V of X-direction, Y-direction under multimeter difference Measuring plate car stateX0、VY0, unit is volt.
The present embodiment measures the gap voltage V of X, Y-direction by taking certain Steam Turbine as an exampleX0For -12.061V, VY0For -11.741V.
C. the gap voltage V of X-direction, Y-direction when measurement Turbo-generator Set is hot respectivelyX1、VY1.The present embodiment measures
3000r/min, i.e. in figure when the shaft of dotted line position, the gap voltage V of X-direction, Y-directionX1For -11.334V, VY1For-
11.998V。
D. the variation delta V of cold and hot X, Y-direction gap voltage is calculated separatelyX、ΔVY.Under gap voltage variable quantity uses
Formula, which calculates, to be obtained.
ΔVX=VX1-VX0
ΔVY=VY1-VY0
In the present embodiment, the variable quantity of cold and hot X, Y-direction gap voltage are as follows:
ΔVX=VX1-VX0=-11.334- (- 12.061)=0.727
ΔVY=VY1-VY0=-11.998- (- 11.741)=- 0.257.
E. cold and hot X, Y-direction current vortex sensor are calculated separately apart from armature spindle span by the variable quantity of gap voltage
From variation delta SX、ΔSY, variable quantity of the current vortex sensor apart from armature spindle diameter distance is using following formula calculating acquisition.
In formula, S is distance of the current vortex sensor apart from the rotor diameter of axle,
V is current vortex sensor gap voltage,
D is current vortex sensor sensitivity, and the sensitivity of current vortex sensor is 7.87mV/ μm.
In the present embodiment, X, Y-direction current vortex sensor are apart from armature spindle diameter distance when from jiggering to constant speed 3000r/min
Variation delta SX、ΔSYAre as follows:
F. calculate that the rotor diameter of axle is vertical, displacement S of horizontal direction⊥、S=, the rotor diameter of axle is vertical, horizontal direction displacement is adopted
It is calculated and is obtained with following formula.
S⊥=Δ SX*cos45°+ΔSY*cos45°
S==Δ SX*sin45°-ΔSY*sin45°
In the present embodiment, the rotor diameter of axle is vertical, horizontal direction displacement S⊥, S=are as follows:
S⊥=△ SX*cos45°+△SY* cos45 °=[92.376+ (- 32.656)] * 0.707=42.222 μm
S==△ SX*sin45°-△SY* sin45 °=[92.376- (- 32.656)] * 0.707=88.398 μm
G. displacement S of the rotor diameter of axle in bearing shell is calculatedAlways, displacement S of the rotor diameter of axle in bearing shellAlwaysIt is obtained using following formula calculating
?.
In the present embodiment, displacement S of the rotor diameter of axle in bearing shellAlwaysAre as follows:
H. the direction that the rotor diameter of axle moves in bearing shell is calculated, the direction benefit that the rotor diameter of axle moves in bearing shell in the present invention
It is stated with the angle theta with vertical direction, is specifically calculated and obtained using following formula.
In the present embodiment, direction that the rotor diameter of axle moves in bearing shell are as follows:
It can thus be concluded that going out, which moves in bearing shell from jiggering to the constant speed 3000r/min rotor diameter of axle
97.963 μm, direction is to upper left and 64.5 ° of vertical direction angle.
Claims (7)
1. measure rotor of turbogenerator set diameter of axle location variation in bearing shell method, which is characterized in that specifically include with
Lower step:
A. in bearing shell radially installed two be mutually perpendicular to, the current vortex sensor for measuring rotor diameter of axle Relative Vibration, point
It is not defined as X-direction current vortex sensor and Y-direction current vortex sensor；
B. distinguish the gap voltage V of X-direction, Y-direction under Measuring plate car statex0、Vy0；
C. the gap voltage V of X-direction, Y-direction when measurement Turbo-generator Set is hot respectivelyx1、Yy1；
D. the variable quantity △ V of cold and hot X, Y-direction gap voltage is calculated separatelyX、△VY；
E. cold and hot X, Y-direction current vortex sensor are calculated separately apart from armature spindle diameter distance by the variable quantity of gap voltage
Variable quantity △ SX、△SY；
F. calculate that the rotor diameter of axle is vertical, displacement S of horizontal direction⊥、S=；
G. displacement S of the rotor diameter of axle in bearing shell is calculatedAlways；
H. the direction that the rotor diameter of axle moves in bearing shell is calculated.
2. the method for measurement rotor of turbogenerator set diameter of axle location variation in bearing shell according to claim 1,
It is characterized in that, measures gap voltage using multimeter or analysis of vibration measurement instrument in step B and C.
3. the method for measurement rotor of turbogenerator set diameter of axle location variation in bearing shell according to claim 1,
It is characterized in that, step D intermediate gap voltage variety is calculated using following formula and obtained:
ΔVX=VX1-VX0
ΔVY=VY1-VY0。
4. the method for measurement rotor of turbogenerator set diameter of axle location variation in bearing shell according to claim 1,
It is characterized in that, variable quantity of the current vortex sensor apart from armature spindle diameter distance is calculated using following formula and obtained in step E:
In formula, S is distance of the current vortex sensor apart from the rotor diameter of axle,
V is current vortex sensor gap voltage,
D is current vortex sensor sensitivity, and the sensitivity of current vortex sensor is 7.87mV/ μm.
5. the method for measurement rotor of turbogenerator set diameter of axle location variation in bearing shell according to claim 1,
It is characterized in that, the rotor diameter of axle is vertical in step F, displacement of horizontal direction is calculated using following formula and obtained:
S⊥=Δ SX*cos45°+ΔSY*cos45°
S==Δ SX*sin45°-ΔSY*sin45°。
6. the method for measurement rotor of turbogenerator set diameter of axle location variation in bearing shell according to claim 1,
It is characterized in that, displacement S of the rotor diameter of axle in bearing shell in step GAlwaysIt is calculated and is obtained using following formula:
7. the method for measurement rotor of turbogenerator set diameter of axle location variation in bearing shell according to claim 1,
It is characterized in that, the direction that the rotor diameter of axle moves in bearing shell in step G is stated using the angle theta with vertical direction, is specifically adopted
It is calculated and is obtained with following formula:
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Cited By (5)
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| CN110469371A (en) * | 2019-07-16 | 2019-11-19 | 河北冀研能源科学技术研究院有限公司 | A method of solving rubbing failure in large capacity turbine start-up course |
| CN111220115A (en) * | 2020-04-16 | 2020-06-02 | 江苏嘉轩智能工业科技股份有限公司 | Eccentricity detection method for bearing cover of external rotor motor and motor spindle assembly |
| CN113532776A (en) * | 2021-06-23 | 2021-10-22 | 杭州意能电力技术有限公司 | Generator shaft tile pillow insulating pad failure diagnosis method and system |
| CN113944548A (en) * | 2020-07-16 | 2022-01-18 | 宝山钢铁股份有限公司 | Method for improving reliability of single-shaft shafting function of gas turbine combined cycle unit |
| RU2809561C1 (en) * | 2020-04-16 | 2023-12-12 | Цзянсу Джасон Интеллиджент Индастриал Текнолоджи Ко., Лтд. | Main shaft assembly of electrical machine |
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| CN113944548A (en) * | 2020-07-16 | 2022-01-18 | 宝山钢铁股份有限公司 | Method for improving reliability of single-shaft shafting function of gas turbine combined cycle unit |
| CN113944548B (en) * | 2020-07-16 | 2022-09-20 | 宝山钢铁股份有限公司 | Method for improving reliability of single-shaft shafting function of gas turbine combined cycle unit |
| CN113532776A (en) * | 2021-06-23 | 2021-10-22 | 杭州意能电力技术有限公司 | Generator shaft tile pillow insulating pad failure diagnosis method and system |
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Application publication date: 20190101 |