CN106247982A - Water turbine overflowing component entirety Shape measure method - Google Patents
Water turbine overflowing component entirety Shape measure method Download PDFInfo
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- CN106247982A CN106247982A CN201610741947.7A CN201610741947A CN106247982A CN 106247982 A CN106247982 A CN 106247982A CN 201610741947 A CN201610741947 A CN 201610741947A CN 106247982 A CN106247982 A CN 106247982A
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- water turbine
- detection
- overflowing component
- cloud data
- turbine overflowing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/24—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
The flow passage components such as rotary wheel of water turbine, stator are the key components and partss of the hydraulic turbine, its pattern directly affects turbine characteristics, the most postrun hydraulic turbine, the pattern of main flow passage components can be destroyed in various degree, needs to detect accordingly, assess and repair.Therefore, pattern and the changing condition thereof of each water turbine overflowing component of whole detection effective, accurate, quantitative is even more important.The present invention provides a kind of water turbine overflowing component entirety Shape measure method: the actual pattern of water turbine overflowing component is carried out optical detection, it is thus achieved that the cloud data of water turbine overflowing component；Wherein, described optical detection includes, uses detection equipment that water turbine overflowing component is carried out disposable whole detection, it is thus achieved that the cloud data of detection object；Or anchor point is set on water turbine overflowing component, uses detection equipment to carry out by several times and detect, it is thus achieved that the cloud data of detection object.
Description
Technical field
The present invention relates to technical field of optical detection, be specifically related to water turbine overflowing component entirety Shape measure method.
Background technology
The flow passage components such as rotary wheel of water turbine, stator are the key components and partss of the hydraulic turbine, and its pattern directly affects the hydraulic turbine
Can, the most postrun hydraulic turbine, the pattern of main flow passage components can be destroyed in various degree, needs to examine accordingly
Survey, assess and repair.Therefore, each water turbine overflowing component of whole detection effective, accurate, quantitative pattern and change shape
Condition is even more important.
Up to now, the destruction situation of water turbine overflowing component substantially can only with visual observations, judgement, even from
GB/T10969 " Turbine Passages technical conditions " specifies, uses model detection to be the most only limited to leaf head and water outlet
The local locations such as limit, and be difficult to be accurately positioned in practical operation.Standard GB/T/T15469.1-2008 " hydraulic turbine, accumulation of energy
Pump and pump turbine cavitation corrosion evaluation " in " 5.2.3, a " be the most only defined as directly measuring to the detection of the cavitation erosion of the hydraulic turbine
Method: use the most interim implant to go to fill by the region of cavitation corrosion, be allowed to return to the most impaired original surface present situation.As
The most measured region is three-dimensional, then need to use model or other suitable devices to enable to determine that benchmark is carried out
Measure.The uncertainty measured is not to be exceeded ± 15%.As can be seen here, current water turbine overflowing component pattern destroy detection, sentence
Disconnected and evaluation is that means backwardnesss, operating difficulties, error are big, it is difficult to satisfied be actually needed the requirement with technological progress.
As a example by runner in flow passage components, in the hydraulic turbine, runner is the core component of turbine-generator units, harsh fortune
Row environment causes the defects such as blade wear, crackle, pit.Owing to the change of blade shape can directly affect turbine-generator units
Stable operation, the precise repairing of defect blade just becomes turbine-generator units and ensures its high performance key factor.Due to water wheels
The abrasion of machine flow passage components and the randomness of cavitation and Unpredictability, must be to it when carrying out the maintenance of water turbine overflowing component
Destruction situation is comprehensively understood, and grasps the situation destroyed, and proposes recovery scenario.And in the reparation of water turbine overflowing component
How Cheng Zhong, obtain the pattern of water turbine overflowing component, and the formulation carrying out recovery scenario according to the pattern after destroying faces
Technical barrier.The problem that existing method exists:
(1) the Shape measure method of water turbine overflowing component
For the destruction situation of water turbine overflowing component, current detection method predominantly estimates judgement, even if using model inspection
Survey, be also only limited to the local location such as leaf head and outlet edge, and be difficult to be accurately positioned in practical operation.Therefore, actual inspection
Time determination error is bigger.
For this special status of cavitation erosion, according to existing Cavitation in Hydraulic Machinery evaluation criteria, its testing result allows
In ± 15% range of error.Therefore, detection error is the biggest.
(2) water turbine overflowing component restorative procedure
In the repair process of water turbine overflowing component, the method used at present is that maintainer is rule of thumb to the mistake after destroying
Stream unit carries out built-up welding, polishing, and the quality after reparation relies primarily on range estimation and judges or model toposcopy, evaluates the most accurately
Means and evaluation model.Make to exist between the quality of the water turbine overflowing component after reparation and archetype bigger gap.It is basic
Reason is that the water turbine overflowing component after destroying does not carries out complete detection, and formulates maintenance program according to the result of detection.
Along with optical detective technology, computer technology, the development of software engineering, to complex-curved detection means, detection
Precision is more and more higher, large-scale, labyrinth such for water turbine overflowing component, how to the hydraulic turbine flow passage after destroying
Part detects, obtain the pattern of water turbine overflowing component after destroying be reparation high-quality to water turbine overflowing component urgently
The technical barrier solved.In view of present situation, it is desirable to provide the detection method of a kind of new water turbine overflowing component entirety pattern, it is possible to
The most rationally obtain the defect pattern of water turbine overflowing component and the exact evaluation to pattern defect, the hydraulic turbine is crossed stream simultaneously
The digitized of the defect model of parts and based on the digitizing technique detection side quantitative, accurate to water turbine overflowing component defect
Method.
Summary of the invention
In order to the most rationally obtain the defect pattern of water turbine overflowing component and the exact evaluation to pattern defect,
Simultaneously to the digitized of the defect model of water turbine overflowing component and based on digitizing technique to water turbine overflowing component defect
Quantitatively, accurate detecting method, the present invention provides a kind of water turbine overflowing component entirety Shape measure method.
Water turbine overflowing component entirety Shape measure method of the present invention is achieved by the following technical solution:
The actual pattern of water turbine overflowing component is carried out optical detection, it is thus achieved that the cloud data of water turbine overflowing component；Wherein,
Described optical detection includes, uses detection equipment that water turbine overflowing component is carried out disposable whole detection, it is thus achieved that detection
The cloud data of object；Or anchor point is set on water turbine overflowing component, uses detection equipment to carry out by several times and detect, it is thus achieved that
The cloud data of detection object；
Described gradation detection includes setting up the frame of reference and building local coordinate system with each anchor point, uses detection equipment pair
The actual pattern in each local coordinate system region carries out optical detection, it is thus achieved that the cloud data in each local coordinate system region, depends on
Position relationship according to local coordinate system and the frame of reference obtains the cloud data of detection object.
Further, the described frame of reference can be connected centrage and the method on the seam face of cylinder with rotary wheel of water turbine with main shaft
Blue plane builds.
Further, described anchor point is set on water turbine overflowing component, including:
(1), when carrying out detecting (leapfrog mode) by repeatedly mobile device, on detection object, anchor point is set；Or,
(2) utilize photographic system take pictures structure coordinate system time, detection object on, anchor point is set；Or,
(3), when utilizing laser to follow the tracks of structure coordinate system, laser tracking ball is anchor point.
The beneficial effect comprise that: the actual pattern of flow passage components is carried out optical detection, can precisely, quantitatively,
Quickly obtaining the cloud data of water turbine overflowing component pattern, subsequent analysis, process for water turbine overflowing component provide basis
Data.
Accompanying drawing explanation
Fig. 1 is water turbine overflowing component entirety Shape measure method rotaring wheel structure schematic diagram of the present invention；
Fig. 2 is that water turbine overflowing component entirety Shape measure method of the present invention photograph alignment system anchor point arranges schematic diagram；
Fig. 3 is that schematic diagram is arranged in water turbine overflowing component entirety Shape measure method place kick of the present invention；
Fig. 4 is the pattern point cloud schematic diagram of water turbine overflowing component entirety Shape measure method local region scans of the present invention；
Fig. 5 is the scanning element cloud schematic diagram data of water turbine overflowing component entirety Shape measure method rotary wheel of water turbine of the present invention；
In figure: (1) face of cylinder, (2) Flange Plane, (3) reflective location patch, (4) ball-type place kick.
Detailed description of the invention
In the present embodiment, as a example by runner, the detection method of water turbine overflowing component entirety pattern is described, the most such as
Under:
The actual pattern of rotary wheel of water turbine is carried out optical detection, it is thus achieved that the cloud data of rotary wheel of water turbine；Wherein,
Described optical detection includes, uses detection equipment that runner is carried out disposable whole detection, it is thus achieved that the cloud data of runner；
Or anchor point is set on runner, uses detection equipment to carry out by several times and detect, it is thus achieved that the cloud data of runner；
Described gradation detection includes setting up the frame of reference and building local coordinate system with each anchor point, uses detection equipment pair
The actual pattern in each local coordinate system region carries out optical detection, it is thus achieved that the cloud data in each local coordinate system region, depends on
Position relationship according to local coordinate system and the frame of reference obtains the cloud data of runner.
The present invention in being embodied as, rotary wheel of water turbine is connected with main shaft as shown in Figure 1 the seam face of cylinder (1) and flange
Plane (2), in unit running process, owing to the seam face of cylinder (1) and Flange Plane (2) are difficult to be destroyed, preferably keeps
Original manufacture shape.Utilize detection equipment to obtain the seam face of cylinder (1) and the characteristic of Flange Plane (2), calculate seam circle
The centrage of cylinder (1), sets up the frame of reference with seam face of cylinder centrage and Flange Plane (2).
In the present embodiment, use the mode that anchor point is set on runner to carry out by several times and detect acquisition based on reference coordinate
The lower cloud data detecting object of system；The mode that the present embodiment uses photographic system to combine with three-dimensional optical scanning system is carried out
Scanning and location, needing on the runner being scanned, pasting for reflective anchor point (3), see Fig. 2, utilize photographic system
Anchor point is taken a picture by (digital camera system), photograph obtain anchor point be scanned during scan regional
Anchor point；
In another embodiment, use optical scanning device, as runner is carried out detecting by several times by joint arm optical detection apparatus, root
According to the physical dimension of runner, layout ball-type place kick (4), see Fig. 3, utilize contact measurement method by repeatedly mobile device,
The characteristic point on detection and location ball surface；
In another embodiment, the mode using laser tracking system to combine with three-dimensional optical scanning system is scanned and fixed
Position, is needing on the runner being scanned, is using handheld three-dimensional laser scanner to be scanned, and laser tracking ball is location
Point；
To the anchor point obtained, the right-hand rule is utilized to build the location coordinate in each partial sweep region；Utilize scanning device
Runner is carried out 3-D scanning, it is thus achieved that the pattern point cloud chart of scanned regional area, see Fig. 4；
After scanning through a region, determine the shift position of scanning device according to the relative position between local coordinate system, by moving
Dynamic scanning device, completes the scanning of whole runner；In order to improve the quick and easy of Point-clouds Registration process, and after splicing
The integrity of data and accuracy, in the scanning process of runner, each scanning area is more than the region at three anchor point places,
And three anchor points are the most in one plane, and a scanning area at least anchor point is to repeat, to each time every time
The point cloud that runner scans, utilizes the position relationship of the frame of reference and local coordinate system, carries out the splicing of a cloud, finally obtain
The scanning cloud data of rotary wheel of water turbine, is shown in Fig. 5.
By this method, to the Shape measure of runner in flow passage components, can shape accurate, quantitative, quickly detection runner
Looks change, and demonstrate the concrete value size of morphology change, area distribution intuitively, either local or overall, can obtain
Accurate testing result, the subsequent analysis destroying situation for runner provides the foundation data.
It should be understood that embodiment is merely to illustrate the present invention rather than limits the scope of the present invention.In addition, it is to be understood that readding
After having read the content that the present invention lectures, the present invention can be made any various change and amendment by those skilled in the art, these
The equivalent form of value falls within the application appended claims equally and is limited.
Claims (3)
1. water turbine overflowing component entirety Shape measure method, it is characterised in that: the actual pattern of water turbine overflowing component is entered
Row optical detection, it is thus achieved that the cloud data of water turbine overflowing component；Wherein,
Described optical detection includes, uses detection equipment that water turbine overflowing component is carried out disposable whole detection, it is thus achieved that detection
The cloud data of object；Or anchor point is set on water turbine overflowing component, uses detection equipment to carry out by several times and detect, it is thus achieved that
The cloud data of detection object；
Described gradation detection includes setting up the frame of reference and building local coordinate system with each anchor point, uses detection equipment pair
The actual pattern in each local coordinate system region carries out optical detection, it is thus achieved that the cloud data in each local coordinate system region, depends on
Position relationship according to local coordinate system and the frame of reference obtains the cloud data of detection object.
Water turbine overflowing component entirety Shape measure method the most according to claim 1, it is characterised in that: described benchmark is sat
Mark system can be connected centrage and the Flange Plane structure on the seam face of cylinder with rotary wheel of water turbine with main shaft.
Water turbine overflowing component entirety Shape measure method the most according to claim 1, it is characterised in that: described at water wheels
On machine flow passage components, anchor point is set, including:
(1) detected by repeatedly mobile device, when i.e. the mode of leapfroging detects, on detection object, anchor point is set；
Or,
(2) utilize photographic system take pictures structure coordinate system time, detection object on, anchor point is set；Or,
(3), when utilizing laser to follow the tracks of structure coordinate system, laser tracking ball is anchor point.
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| CN201610741947.7A CN106247982A (en) | 2016-08-26 | 2016-08-26 | Water turbine overflowing component entirety Shape measure method |
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| CN201610741947.7A CN106247982A (en) | 2016-08-26 | 2016-08-26 | Water turbine overflowing component entirety Shape measure method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107662070A (en) * | 2017-11-09 | 2018-02-06 | 四川工程职业技术学院 | A kind of rotary wheel of water turbine automatic welding repair system |
Citations (4)
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| US20030204366A1 (en) * | 2002-04-30 | 2003-10-30 | Chih-Kuang Chang | System and method for analyzing and processing data on an object |
| CN101113889A (en) * | 2007-07-24 | 2008-01-30 | 天津市天发重型水电设备制造有限公司 | Hydroturbine blade or contraprop non-contact type measurement method |
| CN101520319A (en) * | 2008-02-27 | 2009-09-02 | 邹小平 | Composite three-dimensional laser measurement system and measurement method |
| CN102768026A (en) * | 2012-07-23 | 2012-11-07 | 黑龙江科技学院 | Full-size quick blade detection method and equipment |
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2016
- 2016-08-26 CN CN201610741947.7A patent/CN106247982A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030204366A1 (en) * | 2002-04-30 | 2003-10-30 | Chih-Kuang Chang | System and method for analyzing and processing data on an object |
| CN101113889A (en) * | 2007-07-24 | 2008-01-30 | 天津市天发重型水电设备制造有限公司 | Hydroturbine blade or contraprop non-contact type measurement method |
| CN101520319A (en) * | 2008-02-27 | 2009-09-02 | 邹小平 | Composite three-dimensional laser measurement system and measurement method |
| CN102768026A (en) * | 2012-07-23 | 2012-11-07 | 黑龙江科技学院 | Full-size quick blade detection method and equipment |
Non-Patent Citations (1)
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| CN107662070A (en) * | 2017-11-09 | 2018-02-06 | 四川工程职业技术学院 | A kind of rotary wheel of water turbine automatic welding repair system |
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Application publication date: 20161221 |
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