CN106338262B - Impulse turbine jet stream angle measurement method - Google Patents
Impulse turbine jet stream angle measurement method Download PDFInfo
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- CN106338262B CN106338262B CN201610975368.9A CN201610975368A CN106338262B CN 106338262 B CN106338262 B CN 106338262B CN 201610975368 A CN201610975368 A CN 201610975368A CN 106338262 B CN106338262 B CN 106338262B
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- jet
- angle
- normal disc
- jet tube
- measurement
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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
- G01B11/26—Measuring arrangements characterised by the use of optical techniques for measuring angles or tapers; for testing the alignment of axes
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- General Physics & Mathematics (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
The present invention relates to a kind of impulse turbine jet stream angle measurement methods, using the straightline propagation principle of laser, with the jet stream state of laser analog DC jet tube；Using standard-sized disk, the runner of impulse turbine is simulated.By the arc length between two beam laser on measurement standard disk, the angle between two DC jet tubes is acquired.Using impulse turbine jet stream angle measurement method of the invention, the measurement of angle between two DC jet tubes in space is realized, guarantees the precision of measurement result, completely eliminates influence of the human factor to measurement result.
Description
Technical field: the present invention relates to a kind of impulse turbine jet stream angle measurement methods.
Background technique: the stable operation of impulse turbine needs that accurate jet location is relied on to be guaranteed, jet stream position
The deviation set will reduce unit efficiency, cause unit vibration, influence unit service life.And the DC jet tube of impulse turbine
In relatively independent spatial position, it is difficult accurately to measure the relative angle of two DC jet tubes, i.e. jet stream angle.Usually
Measurement method, measured only for the radial and axial distance of runner, DC jet tube, such as use meter ruler universal measurement
Tool, this method measurement error is big, repeatability is low, not can guarantee the accuracy and reliability of measurement.In recent years also using special
With measuring tool, impingement rotary wheel of water turbine and jet pipe relative position are measured, but the measurement method also only can measure
The axially and radially distance of runner and DC jet tube, is but unable to measure the angle of two neighboring DC jet tube.Therefore, it is impossible to guarantee
The accuracy of impulse turbine jet location；So there is an urgent need to a kind of measurements for impulse turbine jet stream angle
Method, to guarantee the accurate of each DC jet tube jet location, to make up the missing measured size.
Summary of the invention:
It is a kind of to guarantee the accurate of each DC jet tube jet location the purpose of the present invention is disclosing, make up measure size lack
The impulse turbine jet stream angle measurement method of mistake.The technical scheme is that laser generator (5) and DC jet tube
(1) it is positioned by seam allowance and is fixedly connected using the second screw (4)；Normal disc (9) and hydrodynamic bearing (7) pass through water wheels
The outer circle of machine bearing (7) is positioned with end face and is fixedly connected using third screw (8)；It rotates normal disc (9), makes first straight
The starting point A on the jet laser beam alignment criteria disk (9) of jet pipe (10) is flowed, the jet stream of record the second DC jet tube (11) swashs
Calibration points B in beam alignment normal disc (9) reads the arc length of A, B point-to-point transmission on normal disc (9)；Pass through following equation
Acquire the angle between the first DC jet tube of direct current (10) and the second DC jet tube (11)
In formula:
Indicate the jet stream angle of the first DC jet tube (10) Yu the second DC jet tube (11), unit degree；
L indicates the arc length of A, B point-to-point transmission on normal disc (9), unit millimeter；
R indicates the radius of normal disc (9), unit millimeter.
The working principle of the invention is: using the straightline propagation principle of laser, using the jet stream of laser analog DC jet tube
State；Using standard-sized disk, the runner of impulse turbine is simulated.Laser beam is mapped to normal disc by laser generator
On, by the arc length between two beam laser on measurement standard disk, acquire the angle between two DC jet tubes.
The method have the benefit that:
1. realizing the measurement of angle between two DC jet tubes in space: two DC jet tubes being considered as associated components, no longer
Individually the two is measured, avoids the error that different benchmark generate.
2. guaranteeing the precision of measurement result: since the diameter of laser beam is negligible relative to the perimeter of normal disc,
Therefore angle is calculated by measurement arc length, avoid direct measurement angle bring error；Simultaneously as the arc length of normal disc is big
In chord length, jet stream angle is calculated using arc length, guarantees measurement result precision.
3. thoroughly eliminating influence of the human factor to measurement result: laser generator and DC jet tube in this measurement method
Between there are positioning datum, the effective concentricity for guaranteeing laser beam and jet-core region；It is also deposited between normal disc and hydrodynamic bearing
In positioning datum, guarantee the concentricity of normal disc and hydrodynamic bearing.Tester pacifies laser generator and normal disc
After dress, without being adjusted, arc length data are directly read.
4. converting measurement distance for measurement angle: since the angle between two DC jet tubes is located in three-dimensional space, very
The angle of difficult directly both measurements, passes through formulaThe relationship for establishing arc length and angle calculates two by measurement arc length
Angle between DC jet tube, substantially reduces the difficulty of direct measurement angle, while improving the precision of measurement result.
Detailed description of the invention
Fig. 1 is impulse turbine jet stream angle measuring device main view
Fig. 2 is impulse turbine jet stream angle measuring device top view
Fig. 3 is normal disc structure chart
Specific embodiment:
Fig. 1 show impulse turbine jet stream angle measuring device main view, the measurement of impulse turbine jet stream angle
Method, laser generator 5 are positioned by seam allowance with DC jet tube 1 and are fixedly connected using the second screw 4；Normal disc 9 with
Hydrodynamic bearing 7 is positioned with end face by the outer circle of hydrodynamic bearing 7 and is fixedly connected using third screw 8；Such as Fig. 3 institute
Show, rotates normal disc 9, make the starting point A on the jet laser beam alignment criteria disk 9 of the first DC jet tube 10, record the
Calibration points B on the jet laser beam alignment criteria disk 9 of two DC jet tubes 11 reads the arc of A, B point-to-point transmission in normal disc 9
It is long；The angle between direct current the first DC jet tube 10 and the second DC jet tube 11 is acquired by following equation
In formula:
Indicate the jet stream angle of the first DC jet tube 10 and the second DC jet tube 11, unit degree；
L indicates the arc length of A, B point-to-point transmission in normal disc 9, unit millimeter；
R indicates the radius of normal disc 9, unit millimeter.
DC jet tube 1 is fixedly connected with casing 3 by the first screw 2, and hydrodynamic bearing 7 and casing 3 are fixed by bolt 6
Connection, there are positioning spigots between laser generator 5 and DC jet tube 1, guarantee laser beam and 1 central coaxial of DC jet tube, utilize
The two is fixedly connected by the second screw 4.Both normal disc 9 is positioned using the outer circle and end face of hydrodynamic bearing 7, guarantee
Concentricity and verticality, be in 9 periphery of normal disc in 1 stream range of DC jet tube.Using third screw 8 by standard
Disk 9 is fixedly connected with hydrodynamic bearing 7.
Fig. 2 show impulse turbine jet stream angle measuring device top view, rotates normal disc 9, makes the first direct current
Starting point A on the jet laser beam alignment criteria disk 9 of jet pipe 10, at this time the jet laser beam alignment of the second DC jet tube 11
Calibration points B in normal disc 9 reads the arc length of A, B point-to-point transmission in normal disc 9.It must the first direct current by following equation
Angle between jet pipe 10 and the second DC jet tube 11
In formula:
Indicate the jet stream angle of the first DC jet tube 10 and the second DC jet tube 11, unit degree；
L indicates the arc length of A, B point-to-point transmission in normal disc 9, unit millimeter；
R indicates the radius of normal disc 9, unit millimeter；
Only jet stream angle in above formulaFor unknown quantity, the half of the arc length L of A, B point-to-point transmission in normal disc 9, normal disc 9
Diameter r is known quantity.The radius r of usual normal disc 9 is greater than 200mm, therefore knows, therefore, A, B in normal disc 9
The arc length L of point-to-point transmission changes to the angle between the first DC jet tube 10 and the second DC jet tube 11Influence will reduce, improve
Jet stream angleMeasurement accuracy.Meanwhile the measuring tool that this measurement method uses, all there is positioning relation, without artificial
Adjustment, therefore influence of the human factor to measurement result is completely eliminated, guarantee the reliability of measurement result.
Claims (1)
1. a kind of impulse turbine jet stream angle measurement method, it is characterized in that: laser generator (5) and DC jet tube (1) are logical
Seam allowance is crossed to position and be fixedly connected using the second screw (4)；Normal disc (9) and hydrodynamic bearing (7) pass through turbine shaft
The outer circle for holding (7) is positioned with end face and is fixedly connected using third screw (8)；It rotates normal disc (9), sprays the first direct current
The starting point A on the jet laser beam alignment criteria disk (9) of (10) is managed, the jet laser beam of the second DC jet tube (11) is recorded
Calibration points B on alignment criteria disk (9) reads the arc length of A, B point-to-point transmission on normal disc (9)；It is acquired by following equation
Angle between the first DC jet tube of direct current (10) and the second DC jet tube (11)
In formula:
Indicate the jet stream angle of the first DC jet tube (10) Yu the second DC jet tube (11), unit degree；
L indicates the arc length of A, B point-to-point transmission on normal disc (9), unit millimeter；
R indicates the radius of normal disc (9), unit millimeter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610975368.9A CN106338262B (en) | 2016-11-07 | 2016-11-07 | Impulse turbine jet stream angle measurement method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610975368.9A CN106338262B (en) | 2016-11-07 | 2016-11-07 | Impulse turbine jet stream angle measurement method |
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| CN106338262A CN106338262A (en) | 2017-01-18 |
| CN106338262B true CN106338262B (en) | 2019-02-15 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107894197A (en) * | 2017-11-14 | 2018-04-10 | 哈尔滨电机厂有限责任公司 | The cylindrical measurement structure of impulse turbine model runner |
| CN107796280A (en) * | 2017-11-14 | 2018-03-13 | 哈尔滨电机厂有限责任公司 | The cylindrical measuring basis structure of impact type waterturbine wheel |
| CN113108676B (en) * | 2021-04-13 | 2023-03-10 | 哈尔滨电机厂有限责任公司 | Water bucket type water turbine nozzle included angle measuring device |
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