CN104198119B - Nuclear power station main pump dynamic balance test method - Google Patents
Nuclear power station main pump dynamic balance test method Download PDFInfo
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- CN104198119B CN104198119B CN201410418330.2A CN201410418330A CN104198119B CN 104198119 B CN104198119 B CN 104198119B CN 201410418330 A CN201410418330 A CN 201410418330A CN 104198119 B CN104198119 B CN 104198119B
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Abstract
The invention discloses a nuclear power station main pump dynamic balance test method. The nuclear power station main pump dynamic balance test method includes steps: A, measuring bearing vibration of a main pump; B, measuring axial translation vibration of the main pump, wherein the step A includes: A1, respectively using outer circumference faces of an upper bearing and a lower bearing of a motor corresponding to a housing of the main pump as a first tile vibration measurement face and a second tile vibration measurement face; A2, respectively using intersection points of circumference lines of the first tile vibration measurement face and the second tile vibration measurement face with the extension direction of a connection line of the center axis of a straight pipeline at the outlet of the main pump and the center between two top faces of a U-shaped pipeline at the inlet of the main pump as a first tile vibration measurement point and a second tile vibration measurement point, and the step B includes: B1, respectively using outer circumference faces of a flywheel and a coupling as a first shaft vibration measurement face and a second shaft vibration measurement face; B2, respectively using intersection points of circumference lines of the first shaft vibration measurement face and the second shaft vibration measurement face with the extension direction of a connection line of the center axis of the straight pipeline at the outlet of the main pump and the center between the two top faces of the U-shaped pipeline at the inlet of the main pump as a first shaft vibration measurement point and a second shaft vibration measurement point. The nuclear power station main pump dynamic balance test method is efficient and accurate, and comprehensive in examination.
Description
Technical field
The present invention relates to a kind of nuclear power station main pump method of testing, more particularly to a kind of nuclear power station main pump dynamic balancing measurement side
Method.
Background technology
Nuclear power station main pump, i.e. nuclear power plant reactor cooling medium pump, which mainly drives coolant during unit operation in RCP
System (reactor coolant loop) internal circulation flow, continuously the heat transfer produced in reactor core to steam generator
Secondary side feeds water.Main pump is normally operated under high temperature (292 DEG C), high pressure (15.5MPa), the special running environment of high radiation,
Occupy extremely important status in nuclear plant safety operation, and have to main pump that what is stopped transport under overhaul and the state of emergency to want
Ask, and then the status monitoring to main pump is particularly important.
Vibrate as the important indicator for weighing main pump running status, the evaluation and fault diagnosis to main pump running status is played
Particularly important effect.The high vibration of main pump can cause various failure risks, statistical data to show, the vibration of more than 80% main pump is high
The reason for it is relevant with the mass unbalance of shafting, therefore power station generally using spot dynamic balance test by the way of will vibration recover extremely
Good level.
In current main pump dynamic balancing measurement, there is following defect：1st, vibrate measuring point arbitrarily to arrange, do not consider presurized water reactor
The stiffness difference of the stand-type main pump circumferencial direction of nuclear power, so as to site survey systems data and producer standard configuration on-line system data are inclined
Difference is larger；2nd, in testing, vibration examination scope is not comprehensive, lacks the axial displacement data on main pump motor top, it is impossible to which comprehensive assessment sets
Standby vibration characteristics, it is impossible to judge the change of relative gap between the radial direction sound part of motor top；3rd, lack motor top
Axial displacement data, when the unbalanced component on motor top is administered, the start and stop time of main pump during causing spot dynamic balance to be tested
Number increases；4th, the vibration-testing in-site installation stage, it is responsible for the current vortex sensor of examination main pump motor lower bearing position axial displacement
Installed using magnetic adsorption type universal joint, debug time is longer and stability and reliability are relatively low.
The content of the invention
The technical problem to be solved in the present invention is, there is provided a kind of efficiently and accurately and examine comprehensive nuclear power station main pump dynamic flat
Weighing apparatus method of testing.
The technical solution adopted for the present invention to solve the technical problems is：A kind of nuclear power station main pump dynamic balancing measurement side is provided
Method, comprises the following steps：The bear vibration of A, measurement main pump；The axial displacement vibration of B, measurement main pump；Step A includes：
A1, using main pump shell correspondence motor upper bearing (metal) and motor lower bearing outer circumference surface as first watt of measurement of shaking
Face and second watt of measuring surface of shaking；
A2, by the central axis prolongation side of the outlet straight pipeline of the circumference of first watt of measuring surface of shaking and the main pump
To the extending direction with two end face center line of import U-tube road intersect respectively o'clock as first watt of measurement point of shaking, will be described
The central axis extending direction and import U-tube road two of the outlet straight pipeline of the circumference of second watt of measuring surface of shaking and the main pump
The extending direction of end face center line intersect respectively o'clock as second watt of measurement point of shaking；
Step B includes：
B1, shake the outer circumference surface of the outer circumference surface and shaft coupling of flywheel in main pump as first axle measuring surface and
Two axles shake measuring surface；
The central axis prolongation side of the outlet straight pipeline of B2, the circumference of measuring surface that the first axle is shaken and the main pump
The point for intersecting to the extending direction with two end face center line of import U-tube road respectively shakes measurement point as first axle, will be described
Second axle shake measuring surface circumference and the main pump outlet straight pipeline central axis extending direction and import U-tube road two
What the extending direction of end face center line intersected respectively o'clock shakes measurement point as the second axle.
Preferably, in step A1, described first watt lower surface of the measuring surface positioned at the upper bearing (metal) room of the main pump that shake
On cylindrical；Described second watt shake measuring surface positioned at the main pump lower bearing room lower surface it is cylindrical on.
Preferably, in step B1, second axle shakes the periphery that measuring surface is the shaft coupling upper flanges, or
The periphery of the flange that the motor lower end of the main pump is connected with the shaft coupling.
Preferably, step A also includes：
A3, choose two described first watt and shake measurement point and two described second watt measurement point of shaking is used as sensing measurement
Point；Two described first watt measurement point of shaking is respectively the circumference of first watt of measuring surface of shaking and is exported in straight pipeline with described
The circumference and two top surface of import U-tube road of the intersecting point of heart axis extending direction and first watt of measuring surface of shaking
The intersecting point of the extending direction of the line of centres, two described second watt measurement point of shaking are respectively the circle of second watt of measuring surface of shaking
Point and the circumference of second watt of measuring surface of shaking that contour is intersected with the central axis extending direction of the outlet straight pipeline
The point intersected with the extending direction of two end face center line of the import U-tube road；
A4, by velocity sensor respectively by magnetic adsorb it is described sensing measurement point on, measure；
Step B also includes：
B3, choose that two first axles shake measurement point and two second axles shake measurement point as sensing measurement
Point；Two first axles shake measurement point be respectively the first axle shake measuring surface circumference and the outlet straight pipeline in
The intersecting point of heart axis extending direction and the first axle are shaken the circumference and two top surface of import U-tube road of measuring surface
The intersecting point of the extending direction of the line of centres, two second axles measurement point of shaking are respectively second axle and shake the circle of measuring surface
Contour and the point that intersects of central axis extending direction and second axle of the outlet straight pipeline shake the circumference of measuring surface
The point intersected with the extending direction of two end face center line of the import U-tube road；
B4, current vortex sensor is corresponded to respectively and the sensing measurement point is spaced and is shaken measuring surface installed in the first axle
With second axle shake measuring surface periphery, measure.
Preferably, in step A3, two described first watt shake measurement point in first watt of measuring surface of shaking just
Hand over；Two described second watt measurement point of shaking is orthogonal in second watt of measuring surface of shaking.
Preferably, in step B3, two first axles shake measurement point on the first axle shakes measuring surface just
Hand over；Two second axles measurement point of shaking is orthogonal on second axle shakes measuring surface.
Preferably, the spacing distance in step B4, between the current vortex sensor and the sensing measurement point
For：According to corresponding distance ± 10% in linear dynamic range midpoint on the dynamic response curve of the current vortex sensor.
Preferably, in step B4, the current vortex sensor is separately mounted to the first axle by support and shakes
Measuring surface and second axle shake the periphery of measuring surface；
The natural frequency of the support is more than main pump operating frequency 10%.
Preferably, shake measuring surface in the first axle, the support is fixed on the air inlet of the flywheel outer housing of the main pump
On, the current vortex sensor is worn and is connect on the bracket perpendicular to first axle measuring surface of shaking；
Shake measuring surface in second axle, the support is fixed on the motor lower end of the main pump or in the main pump
On closed chamber, the current vortex sensor is worn and is connect on the bracket perpendicular to second axle measuring surface of shaking.
Preferably, the method for testing is further comprising the steps of：
C, the velocity sensor and the current vortex sensor data that obtain of sensing are carried out using influence coefficient method
Analyzing and processing.
The nuclear power station main pump dynamic balance test method of the present invention, with reference to main pump circumferencial direction stiffness difference choose watt shake and
Axle shakes measurement point, to obtain more accurate, comprehensive main pump vibration data, more accurately reflects out the indeed vibrations situation of main pump,
To be more accurately adjusted；And vibration data once can be obtained, time-saving and efficiency.
Description of the drawings
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing：
Fig. 1 is the electric machine structure schematic diagram of nuclear power station main pump in the present invention；
Fig. 2 is first watt of shake measuring surface and schematic diagram of first watt of measurement point of shaking thereon in the present invention；
Fig. 3 is the structural representation of flywheel section in nuclear power station main pump in the present invention；
Fig. 4, Fig. 5 are the structural representations of nuclear power station main pump joint portions in the present invention.
Specific embodiment
In order to be more clearly understood to the technical characteristic of the present invention, purpose and effect, now compare accompanying drawing and describe in detail
The specific embodiment of the present invention.
The nuclear power station main pump dynamic balance test method of one embodiment of the invention, comprises the following steps：
The bear vibration (abbreviation watt shakes) of A, measurement main pump；
Axial displacement vibration (abbreviation axle shakes) of B, measurement main pump.
Step A and step B are used for the bear vibration data and axial displacement vibration data for obtaining main pump, for subsequently carrying out
Analyzing and processing.The order that step A and step B are carried out is in no particular order, you can carry out step B again first to carry out step A, it is also possible to
First carrying out step B carries out step A again, or both simultaneously carry out.
Wherein, as shown in figure 1, step A includes：
A1, measuring surface of watt shaking selection should be close proximity to bearing constrained, therefore by axle on main pump shell correspondence motor
Hold with the outer circumference surface of motor lower bearing respectively as first watt of shake measuring surface 11 and second watt of measuring surface 12 of shaking.
In step A1, first watt shake measuring surface 11 positioned at main pump upper bearing (metal) room 101 lower surface it is cylindrical on；Second watt
Measuring surface of shaking 12 be located at main pump lower bearing room 102 lower surface it is cylindrical on.
A2, the circumference of measuring surface 11 that first watt is shaken are intersected with the central axis extending direction of the outlet straight pipeline of main pump
Point and first watt of measuring surface 11 of shaking circumference and main pump two end face center line of import U-tube road extending direction
Intersecting o'clock used as first watt of measurement point of shaking；By the circumference of second watt of measuring surface 12 of shaking and the outlet straight pipeline of the main pump
The circumference of the intersecting point of central axis extending direction and second watt of measuring surface 12 of shaking and two top of import U-tube road of main pump
The extending direction of the face line of centres it is intersecting o'clock as second watt of measurement point of shaking.
In step A2, the selection of measurement point of watt shaking needs to consider watt to shake width of each point by stiffness effect on measuring surface circumference
Value difference is different.In main pump, the circumference of measuring surface of watt shaking (including first watt of shake measuring surface 11 and second watt of measuring surface 12 of shaking) with
Point of the intersecting point of the central axis extending direction of the outlet straight pipeline of main pump for maximum rigidity, and the circumference of measuring surface of watt shaking
Point of the point intersected with the extending direction of the two end face center line of import U-tube road of main pump for minimum rigidity.
Wherein, the circumference of first watt of measuring surface 11 of shaking is had with the central axis extending direction of the outlet straight pipeline of main pump
The prolongation of two intersecting points, the circumference of first watt of measuring surface 11 of shaking and the two end face center line of import U-tube road of main pump
Direction also has two intersecting points, therefore first watt of measurement point of shaking has four points, is respectively distributed to first watt of measuring surface 11 of shaking
On the four direction of circumference.The central axis prolongation side of the outlet straight pipeline of the circumference and main pump of first watt of measuring surface 11 of shaking
To the line of two intersecting points, two end face center of import U-tube road with the circumference and main pump of first watt of measuring surface 11 of shaking
The line Relative vertical of two intersecting points of the extending direction of line；Any one point in any one point and the latter in the former is all
Orthogonal, i.e., any one point in any one point and the latter in the former shakes what 11 circle center line connecting of measuring surface was formed respectively with first watt
The angle of radius is right angle.With reference to Fig. 1,2, wherein arrow E represents the outlet conduit of main pump and flows out direction, and arrow F represents main pump
Inlet pipeline stream enter direction, circle represents the circumference of first watt of measuring surface 11 of shaking, and D1, D2 represent first watt of measurement of shaking respectively
The point that the circumference in face 11 is intersected with the central axis extending direction of the outlet straight pipeline of main pump, D3, D4 represent first watt respectively
The point that the circumference of measuring surface of shaking 11 is intersected with the extending direction of the two end face center line of import U-tube road of main pump, D1, D2's
Line is mutually perpendicular to the line of D1, D2.
In the same manner, the circumference of second watt of measuring surface 12 of shaking is had with the central axis extending direction of the outlet straight pipeline of main pump
The prolongation of two intersecting points, the circumference of second watt of measuring surface 12 of shaking and the two end face center line of import U-tube road of main pump
Direction also has two intersecting points, and second watt of measurement point of shaking also has four points, be respectively distributed to second watt of measuring surface 12 of shaking and justify
On the four direction of contour.The central axis extending direction of the outlet straight pipeline of the circumference and main pump of second watt of measuring surface 12 of shaking
The line of two intersecting points, is connected with two end face center of import U-tube road of main pump with the circumference of second watt of measuring surface 12 of shaking
The line Relative vertical of two intersecting points of the extending direction of line；Any one point in any one point and the latter in the former is all just
Hand over.
Further, step A may also include：
A3, choose two first watt and shake measurement point and two second watt measurement point of shaking is used as sensing measurement point；Wherein, two
Individual first watt measurement point of shaking is respectively the circumference of first watt of measuring surface 11 of shaking and the central axis extending direction of outlet straight pipeline
The extending direction phase of the circumference of intersecting point and first watt of measuring surface 11 of shaking and two end face center line of import U-tube road
The point of friendship, the D1 in such as Fig. 2 and D3, D1 and D4, D2 and D3 or D2 and D4.Two second watt measurement point of shaking is respectively second watt and shakes
Point and second watt of measuring surface 12 of shaking that the circumference of measuring surface 12 is intersected with the central axis extending direction of outlet straight pipeline
The point that circumference is intersected with the extending direction of two end face center line of import U-tube road, refers to Fig. 2.Two first watt survey of shaking
The selection mode of amount point and two second watt of measurement points of shaking, so as to select the point conduct of the point with maximum rigidity and minimum rigidity
Sensing measurement point, can obtain accurate watt of measurement data of shaking.
In step A3, two first watt measurement point of shaking shake measuring surface 11 at first watt on it is orthogonal；Two second watt is shaken
Measurement point shake measuring surface 12 at second watt on orthogonal, the selection of this kind of orthogonal manner, it is ensured that the data of follow-up measurement it is consistent
Property, middle complicated conversion link is reduced in subsequent data analysis process.
A4, by velocity sensor respectively by magnetic adsorb sensing measurement point on, measure.Wherein, watt shake measurement
Directly adsorbed in sensing measurement point by the magnetic support of itself for contact measurement, therefore velocity sensor.Velocity sensor is main
For moving-coil speed sensor；Measurement of the velocity sensor in each sensing measurement point can sequentially be carried out or while be carried out.
As in Figure 3-5, step B includes：
B1, shake the outer circumference surface of the outer circumference surface of flywheel in main pump 1 and shaft coupling 2 as first axle measuring surface 13
Shake measuring surface 14 with the second axle.
As the measurement that axle shakes is non-cpntact measurement, generally measured using current vortex sensor 3, and due to current vortex
The mounting condition of sensor 3 requires that current vortex acts on the surface of rotor revolving body in main pump, i.e., under motor upper bearing (metal), motor
The part for having rotating shaft exposed near bearing.Therefore in the present embodiment, first axle measuring surface 13 of shaking is selected in the cylindrical of flywheel 1
Side face, the second axle are shaken the periphery or the flange that is connected with shaft coupling 2 of 4 lower end of motor that measuring surface 14 is 2 upper flanges of shaft coupling
Periphery.
What the outlet straight pipeline central axis extending direction of B2, the circumference of measuring surface that first axle is shaken 13 and main pump intersected
Point and first axle shake measuring surface 13 circumference and main pump two end face center line of import U-tube road extending direction phase
The point of friendship shakes measurement point as first axle；Second axle is shaken the outlet straight pipeline central axis of the circumference and main pump of measuring surface 14
Shake two end face center of import U-tube road of circumference and main pump of measuring surface 14 of the intersecting point of extending direction and the second axle connects
The extending direction of line is intersecting o'clock to shake measurement point as the second axle.
In step B2, the shake selection of measurement point of axle needs to consider that axle shakes width of each point by stiffness effect on measuring surface circumference
Value difference is different.In main pump, axle shake measuring surface (shake measuring surface 13 including first axle and the second axle shake measuring surface 14) circumference with
Point of the intersecting point of the central axis extending direction of the outlet straight pipeline of main pump for maximum rigidity, and axle shakes the circumference of measuring surface
Point of the point intersected with the extending direction of the two end face center line of import U-tube road of main pump for minimum rigidity.
In step B2, first axle shake measuring surface 13 circumference and main pump outlet straight pipeline central axis prolongation side
To with two intersecting points, first axle is shaken the circumference of measuring surface 13 and the two end face center line of import U-tube road of main pump
Extending direction also there are two intersecting points, therefore first axle measurement point of shaking has four points, is respectively distributed to first axle and shakes survey
On the four direction of 13 circumference of amount face, Fig. 2 is referred to.First axle is shaken the circumference of measuring surface 13 and the outlet straight pipeline of main pump
Intersecting two points of central axis extending direction line, the circumference of measuring surface 13 of shaking with first axle and the import U of main pump
The line Relative vertical of two intersecting points of the extending direction of two end face center line of type pipeline；In the former any one point with it is rear
Any one point in person is all orthogonal, i.e., any one in any one point and the latter in the former puts measuring surface of shaking with first axle respectively
The angle of the radius that 13 circle center line connectings are formed is right angle.
In the same manner, the second axle shake measuring surface 14 circumference and main pump outlet straight pipeline central axis extending direction have
Two intersecting points, the second axle shake the prolongation of the circumference of measuring surface 14 and the two end face center line of import U-tube road of main pump
Direction also has two intersecting points, and the second axle measurement point of shaking also has four points, is respectively distributed to the second axle measuring surface 14 of shaking and justifies
On the four direction of contour, Fig. 2 is referred to.Second axle shake measuring surface 14 circumference and main pump outlet straight pipeline central shaft
The line of two intersecting points of line extending direction, the circumference of measuring surface 14 of shaking with the second axle and the import U-tube road two of main pump
The line Relative vertical of two intersecting points of the extending direction of end face center line；Appointing in any one point and the latter in the former
One point is all orthogonal.
Further, step B may also include：
B3, choose that two first axles shake measurement point and two the second axles shake measurement point as sensing measurement point；Two
One axle shake measurement point be respectively first axle shake measuring surface 13 circumference with export straight pipeline central axis extending direction intersect
Point and first axle shakes the circumference of measuring surface 13 and the extending direction of two end face center line of import U-tube road intersects
Point, two the second axles measurement point of shaking are respectively that the second axle shakes the circumference of measuring surface 14 and the central axis of outlet straight pipeline extends
The intersecting point in direction and the second axle shake the circumference of measuring surface 14 and the prolongation side of two end face center line of import U-tube road
To intersecting point.The selection mode of measurement point that two first axles shake measurement point and two the second axles shake, so as to select with maximum
The point of the point and minimum rigidity of rigidity can obtain accurate axle and shake measurement data as sensing measurement point.
In step B3, two first axles measurement point of shaking is orthogonal on first axle shakes measuring surface 13；Two the second axles shake
Measurement point is orthogonal on the second axle shakes measuring surface 14, the selection of this kind of orthogonal manner, it is ensured that subsequently the data of measurement is consistent
Property, middle complicated conversion link is reduced in subsequent data analysis process.
B4, current vortex sensor 3 is corresponded to respectively and sensing measurement point is spaced and is shaken measuring surface 13 and the installed in first axle
Two axles measuring surface 14 of shaking is peripheral, measures.
In step B4, the spacing distance between current vortex sensor 3 and sensing measurement point is：Sensed according to current vortex
Corresponding distance ± 10% in linear dynamic range midpoint on the dynamic response curve of device 3.Preferably, the spacing distance selects institute
The corresponding distance in linear dynamic range midpoint on the dynamic response curve stated；In practical operation, the spacing distance can be in
In the range of ± the 10% of the corresponding distance of point.The dynamic response curve of current vortex sensor 3 is obtained using prior art.
Wherein, axle shakes and is measured as non-cpntact measurement, therefore, current vortex sensor 3 is separately mounted to first axle by support 5
Measuring surface of shaking 13 and the second axle shake the periphery of measuring surface 14；The natural frequency of support 5 is more than main pump operating frequency 10%, it is to avoid
Frame 5 is resonated with main pump.In the present embodiment, support 5 is made using stainless steel material.The current vortex sensor 3 is sensed at each
Measurement in measurement point can sequentially be carried out or while be carried out.Current vortex sensor 3 is shaken the outer of measuring surface installed in axle by support 5
Enclose, then each sensing measurement point is measured, it is simple to operate and quick.
Specifically, as shown in figure 3, shaking measuring surface 13 in first axle, support 5 is fixed on the outer housing 10 of the flywheel 1 of main pump
On air inlet, current vortex sensor 3 is worn and is connected on support 5 perpendicular to first axle measuring surface 13 of shaking, the sensing of current vortex sensor 3
Head is then just to sensing measurement point.As shown in figure 4, shaking measuring surface 14 in the second axle, support 5 is fixed on 4 lower end of motor of main pump,
Current vortex sensor 3 is worn and is connected on support 5 perpendicular to the second axle measuring surface 14 of shaking, and the sensing head of current vortex sensor 3 is then just right
Sensing measurement point；Or, as shown in figure 5, shaking measuring surface 14 in the second axle, support 5 is fixed on the closed chamber 6 in main pump, electricity
Eddy current sensor 3 is worn and is connected on support 5 perpendicular to the second axle measuring surface 14 of shaking, and the sensing head of current vortex sensor 3 is then just to sense
Survey measurement point.As shown in figure 5, when the second axle shake measuring surface 14 be 2 upper flanges of shaft coupling periphery when, preferably by support 5
It is fixed on the closed chamber 6 in main pump；As shown in figure 4, when the second axle measuring surface 14 of shaking is connected with shaft coupling 2 for 4 lower end of motor
Flange periphery, preferably support 5 is fixed on 4 lower end of motor of main pump.
Further, the method for testing of the embodiment is further comprising the steps of：
C, place is analyzed to velocity sensor and the data that obtain of sensing of current vortex sensor 3 using influence coefficient method
Reason.The step can be realized using prior art.
As a kind of preferred implementation of the present embodiment method of testing, as first watt of measurement of shaking of sensing measurement point
Point, second watt of measurement point of shaking, first axle shake measurement point and the second axle shakes in measurement point, prolong with the central axis of outlet straight pipeline
Length direction intersects that first watt of measurement point of shaking of acquisition, second watt of measurement point of shaking, first axle shake measurement point and the second axle shakes measurement
Point positioned at the same side, intersect with the extending direction of two end face center line of import U-tube road acquisition first watt of measurement point of shaking, the
Two watts of measurement points of shaking, first axle shake measurement point and the second axle shakes measurement point position in the same side.In order to further speed up test effect
Rate, after a measurement point determines in positioned at each measurement point of the same side, can obtain other surveys along main pump axial direction correspondence
Amount point is measured.
The selection of measurement point that the present invention shakes measurement point by above-mentioned watt and axle shakes, with reference to velocity sensor and current vortex sensing
Device to watt shaking measurement point and axle measurement point of shaking is sensed, can obtain motor upper axis and shake on gross energy and frequency spectrum, motor respectively
Gross energy is shaken in guide shoe mechanical clearance and dynamic clearance change, point motor top watt and frequency spectrum, motor lower portion axle shake gross energy and frequency
Spectrum, shake gross energy and frequency spectrum, motor top of guide shoe machinery static clearance and dynamic clearance change, motor lower portion watt is uneven under motor
The data such as weighing apparatus vector (size and Orientation) and motor lower portion unbalance vector (size and Orientation) are examined, compared with existing skill
The method of testing of art and on-line vibration monitoring system are examined more fully, more accurately reflect out the indeed vibrations situation of main pump, with
Just more accurately it is adjusted.
Embodiments of the invention are the foregoing is only, the scope of the claims of the present invention is not thereby limited, it is every using this
Equivalent structure or equivalent flow conversion that bright description and accompanying drawing content are made, or directly or indirectly it is used in other related skills
Art field, is included within the scope of the present invention.
Claims (10)
1. a kind of nuclear power station main pump dynamic balance test method, comprises the following steps：The bear vibration of A, measurement main pump；B, measurement master
The axial displacement vibration of pump；Characterized in that, step A includes：
A1, using main pump shell correspondence motor upper bearing (metal) and motor lower bearing outer circumference surface as first watt shake measuring surface and
Second watt of measuring surface of shaking；Described first watt is shaken measuring surface and second watt is shaken in measuring surface watt shakes and to refer to the bear vibration of main pump；
A2, the circumference of first watt of measuring surface of shaking is intersected with the outlet straight pipeline center line axis extending direction of the main pump
Point, the prolongation side of the circumference of first watt of measuring surface of shaking and the two end face center line of import U-tube road of the main pump
To intersecting o'clock as first watt of measurement point of shaking；By the outlet straight tube of the circumference of second watt of measuring surface of shaking and the main pump
The import U-tube road of the intersecting point of road center line axis extending direction, the circumference of second watt of measuring surface of shaking and the main pump
The extending direction of two end face center lines it is intersecting o'clock as second watt of measurement point of shaking；
First watt of measurement point of shaking is the maximum point of rigidity in each point on the described first watt measuring surface circumference that shakes, described second watt
Measurement point of shaking is the point of rigidity minimum in each point on the described second watt measuring surface circumference that shakes；
Step B includes：
B1, shake the outer circumference surface of the outer circumference surface and shaft coupling of flywheel in main pump as first axle measuring surface and the second axle
Shake measuring surface；The first axle axle that measuring surface and the second axle shake in measuring surface that shakes shakes and refers to the axial displacement vibration of main pump；
The outlet straight pipeline center line axis extending direction of B2, the circumference of measuring surface that the first axle is shaken and the main pump intersects
Point, the first axle shake measuring surface circumference and the main pump two end face center line of import U-tube road prolongation side
Shake measurement point to intersecting point as first axle；Second axle is shaken the outlet straight tube of the circumference and the main pump of measuring surface
The intersecting point of road center line axis extending direction, second axle shake measuring surface circumference and the main pump import U-tube road
The extending direction of two end face center lines is intersecting o'clock to shake measurement point as the second axle；
First axle measurement point of shaking is that the first axle is shaken on measuring surface circumference the maximum point of rigidity, second axle in each point
Measurement point of shaking is that second axle shakes on measuring surface circumference the minimum point of rigidity in each point.
2. nuclear power station main pump dynamic balance test method according to claim 1, it is characterised in that in step A1, institute
State first watt shake measuring surface positioned at the main pump upper bearing (metal) room lower surface it is cylindrical on；Described second watt measuring surface of shaking is positioned at institute
State the lower bearing room of main pump lower surface it is cylindrical on.
3. nuclear power station main pump dynamic balance test method according to claim 1, it is characterised in that in step B1, institute
State the second axle to shake the periphery that measuring surface is the shaft coupling upper flanges, or the motor lower end of the main pump and the shaft coupling
The periphery of the flange of connection.
4. nuclear power station main pump dynamic balance test method according to claim 1, it is characterised in that step A also includes：
A3, choose two described first watt and shake measurement point and two described second watt measurement point of shaking is used as sensing measurement point；Two
Individual described first watt measurement point of shaking is respectively the circumference of first watt of measuring surface of shaking and the central shaft of the outlet straight pipeline
The circumference and two end face center of import U-tube road of the intersecting point of line extending direction and first watt of measuring surface of shaking
The intersecting point of the extending direction of line, two described second watt measurement point of shaking are respectively the circumference of second watt of measuring surface of shaking
The point intersected with the central axis extending direction of the outlet straight pipeline and circumference and the institute of second watt of measuring surface of shaking
State the intersecting point of the extending direction of two end face center line of import U-tube road；
A4, by velocity sensor respectively by magnetic adsorb it is described sensing measurement point on, measure；
Step B also includes：
B3, choose that two first axles shake measurement point and two second axles shake measurement point as sensing measurement point；Two
The individual first axle shake measurement point be respectively the first axle shake measuring surface circumference and it is described outlet straight pipeline central shaft
The intersecting point of line extending direction and the first axle are shaken the circumference and two end face center of import U-tube road of measuring surface
The intersecting point of the extending direction of line, two second axles measurement point of shaking are respectively second axle and shake the circumference of measuring surface
With the point that intersects of central axis extending direction and second axle of the outlet straight pipeline shake measuring surface circumference and institute
State the intersecting point of the extending direction of two end face center line of import U-tube road；
B4, current vortex sensor is corresponded to respectively and the sensing measurement point is spaced and is shaken measuring surface and institute installed in the first axle
State the second axle shake measuring surface periphery, measure.
5. nuclear power station main pump dynamic balance test method according to claim 4, it is characterised in that in step A3,
Two described first watt measurement point of shaking is orthogonal in first watt of measuring surface of shaking；Two second watt of measurement points of shaking are described
It is orthogonal in second watt of measuring surface of shaking.
6. nuclear power station main pump dynamic balance test method according to claim 4, it is characterised in that in step B3,
Two first axles measurement point of shaking is orthogonal on the first axle shakes measuring surface；Two second axles shake measurement point described
Second axle shakes orthogonal in measuring surface.
7. nuclear power station main pump dynamic balance test method according to claim 4, it is characterised in that in step B4,
Spacing distance between the current vortex sensor and the sensing measurement point is：Rung according to the dynamic of the current vortex sensor
Answer corresponding distance ± 10% in linear dynamic range midpoint on curve.
8. nuclear power station main pump dynamic balance test method according to claim 4, it is characterised in that in step B4,
The current vortex sensor is separately mounted to by support that the first axle shakes measuring surface and second axle shakes the outer of measuring surface
Enclose；
The natural frequency of the support is more than main pump operating frequency 10%.
9. nuclear power station main pump dynamic balance test method according to claim 8, it is characterised in that shake survey in the first axle
Amount face, the support are fixed on the air inlet of flywheel outer housing of the main pump, and the current vortex sensor is perpendicular to described
One axle measuring surface of shaking is worn and is connect on the bracket；
Shake measuring surface in second axle, the support is fixed on the sealing on the motor lower end of the main pump or in the main pump
On room, the current vortex sensor is worn and is connect on the bracket perpendicular to second axle measuring surface of shaking.
10. nuclear power station main pump dynamic balance test method according to claim 4, it is characterised in that the method for testing is also wrapped
Include following steps：
C, the velocity sensor and the current vortex sensor data that obtain of sensing are analyzed using influence coefficient method
Process.
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| CN105275790B (en) * | 2015-11-06 | 2017-03-22 | 大亚湾核电运营管理有限责任公司 | Method for adjusting nuclear power station and loop coolant pump |
| CN106930958B (en) * | 2015-12-31 | 2018-07-27 | 中国核动力研究设计院 | The dynamic balance test method of mass of medium in a kind of simulation pump impeller channel |
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| US4511149A (en) * | 1983-09-29 | 1985-04-16 | Borg-Warner Corporation | Mechanical seal with cylindrical balance sleeve |
| CN201552158U (en) * | 2009-12-15 | 2010-08-18 | 武汉海王新能源工程技术有限公司 | Ultrasonic cleaning device of nuclear power station main pump |
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| US4511149A (en) * | 1983-09-29 | 1985-04-16 | Borg-Warner Corporation | Mechanical seal with cylindrical balance sleeve |
| CN201552158U (en) * | 2009-12-15 | 2010-08-18 | 武汉海王新能源工程技术有限公司 | Ultrasonic cleaning device of nuclear power station main pump |
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Effective date of registration: 20171018 Address after: 518031 Guangdong province Futian District Shangbu Road West of the city of Shenzhen Shenzhen science and technology building 24 room 2405 Co-patentee after: Guangdong Nuclear Power Joint Venture Co., Ltd Patentee after: China General Nuclear Nuclear Power Co., Ltd. Co-patentee after: China wide nuclear electricity incorporated company Address before: 518031 Guangdong city of Shenzhen province Futian District science and technology building, Shangbu road 18 Co-patentee before: China wide nuclear electricity incorporated company Patentee before: China General Nuclear Nuclear Power Co., Ltd. |