CN105973188A - System and method for measurement of engine jet pipe axis - Google Patents
System and method for measurement of engine jet pipe axis Download PDFInfo
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- CN105973188A CN105973188A CN201510920764.7A CN201510920764A CN105973188A CN 105973188 A CN105973188 A CN 105973188A CN 201510920764 A CN201510920764 A CN 201510920764A CN 105973188 A CN105973188 A CN 105973188A
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- jet pipe
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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
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/22—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring angles or tapers; for testing the alignment of axes
- G01B21/24—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring angles or tapers; for testing the alignment of axes for testing alignment of axes
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- Length Measuring Devices By Optical Means (AREA)
Abstract
The present invention relates to a system and method for measurement of an engine jet pipe axis. The system comprises a leveling seat frame and a rotation measurement device. The rotation measurement device includes a measurement rod, and the measurement rod is rotated in the circumferential direction; the measurement rod is provided with an angle sensor and a plurality of laser displacement sensors; the laser displacement sensors are located at different heights of the measurement rod and configured to measure the radial distance between the inner wall of the jet pipe and corresponding laser displacement sensors; the angle sensor is located on the measurement rod and configured to measure the rotation angle of the measurement rod; the measurement rod is vertically arranged on the leveling seat frame; and the leveling seat frame is contacted with the nozzle of the engine jet pipe. The non-contact measurement of the engine jet pipe axis is realized, the damaging of the jet pipe caused by the contact measurement is avoided, and the measurement result is accurate.
Description
Technical field
The present invention relates to mechanical meaurement field, particularly relate to the measurement system and method for a kind of engine jet pipe axis.
Background technology
Engine jet pipe axis is as the thrust line of electromotor, for the position of electromotor synthesis thrust.Nozzle axis in dynamical system particularly rocket tube axis needs Exact Design.Existing rocket tube axis determines simply by design, and its premise is that mismachining tolerance is less, shapes rear jet deformation less.Real axis and design occur that deviation needs go to find by measurement.But use general measuring method, uses survey tool contact measurement engine jet pipe axis to have bigger difficulty.
Axis, inside jet pipe, is determined by jet pipe interior shape, typically has protrusion, thus shaft centerline measurement needs to carry out inside jet pipe outside jet pipe.Nozzle axis is directly to measure, and needs by measuring each section of circle of inwall, and by cutting the calculated center of circle of circle, the center of circle connecting each section of circle obtains nozzle axis.Each section of circle of nozzle wall is measured, and the internal circle that cuts is probably ellipse, and measuring point needs more, just can accurately draw home position.But being not easy to ensure to measure on internal same section of circle in general measure, owing to jet pipe is similar taper, measure at the most same section of circle and will bring bigger error, the deviation that the error that measurement itself brings is actual more than axis, such measurement becomes to nonsensical.
Engine jet pipe particularly rocket tube is expensive, forbids to collide with, and needs to use survey tool to touch nozzle wall, can collide with unavoidably or scratch inwall, causing damage in general measure.
Summary of the invention
The technical problem to be solved is: the problem that nozzle wall can be caused damage by the measuring method of existing contact nozzle axis and measurement error is big.
For solving above-mentioned technical problem, one aspect of the present invention proposes the measurement system of a kind of engine jet pipe axis, and the measurement system of this engine jet pipe axis includes:
Leveling mounting and rotary measurement device；
Described rotary measurement device includes measuring bar, described measurement bar circumference rotation；
Described measurement bar is provided with angular transducer and multiple laser displacement sensor；
The plurality of laser displacement sensor is positioned on the differing heights of described measurement bar, for measuring the nozzle wall radial distance with corresponding laser displacement sensor；
Described angular transducer is positioned on described measurement bar, for measuring the anglec of rotation of described measurement bar；
Described measurement bar is vertically arranged on described leveling mounting；
Described leveling mounting contacts with the spout of engine jet pipe.
Alternatively, the measurement system of this engine jet pipe axis also includes signal record and processor；
Described signal record is connected with described angular transducer and multiple laser displacement sensor with processor, obtains the axis of described jet pipe with the anglec of rotation of the radial distance of corresponding laser displacement sensor and described measurement bar for the inwall according to described jet pipe.
Alternatively, described leveling mounting includes clutch shaft bearing and the second bearing；
Described measurement bar includes rotating shaft bar and multiple exhibition bar；
Described rotating shaft bar is vertically arranged on described leveling mounting through described clutch shaft bearing and described second bearing；
The plurality of laser displacement sensor is respectively arranged on the plurality of exhibition bar.
Alternatively, described angular transducer is positioned at the bottom of described rotating shaft bar, and the rotating shaft of described angular transducer is connected with the axle center of described rotating shaft bar.
Alternatively, described leveling mounting be shaped as triangle.
Alternatively, on the predetermined central axis of the measurement system that described measurement bar is positioned at engine jet pipe axis.
Alternatively, the measurement system of this engine jet pipe axis also includes:
Three upper posture adjustment plates and three guide posts；
Described upper posture adjustment plate is arranged on described leveling mounting, and for contacting with the spout of engine jet pipe, regulation spout is in level；
Described three guide posts are vertically arranged on described three upper posture adjustment plate positions away from described measurement bar respectively, play the guiding role with the placement to engine jet pipe.
Alternatively, the measurement system of this engine jet pipe axis also includes:
Three lower posture adjustment plates；
Described three lower posture adjustment plates are arranged at the bottom of described leveling mounting, are used for regulating leveling mounting (1) and are in level.
Another aspect of the present invention proposes the measuring method of a kind of engine jet pipe axis, and the method includes:
Obtain the radial distance of nozzle wall and corresponding laser displacement sensor；
Obtain the anglec of rotation measuring bar；
Inwall according to described jet pipe obtains the center of circle of multiple sections of circles with the anglec of rotation of the radial distance of corresponding laser displacement sensor and described measurement bar, connects each section of round heart and obtains engine jet pipe axis.
Alternatively, the described center of circle obtaining multiple sections of circles according to the inwall of described jet pipe with the anglec of rotation of the radial distance of corresponding laser displacement sensor and described measurement bar, including:
Use least square fitting method that the inwall of described jet pipe is fitted with the anglec of rotation of the radial distance of corresponding laser displacement sensor and described measurement bar, obtain the center of circle of multiple sections of circles.
The measurement system and method for the engine jet pipe axis that the present invention proposes, achieve the non-contact measurement to engine jet pipe axis, avoid the damage that nozzle wall is caused by contact type measurement, the radial distance of multiple sections of circles of engine jet pipe inwall is obtained by multiple laser displacement sensors, the anglec of rotation measuring bar is obtained by angular transducer, the anglec of rotation of the radial distance according to multiple sections of circles and measurement bar obtains the axis of jet pipe, and measurement result is accurate.
Accompanying drawing explanation
By being more clearly understood from the features and advantages of the present invention with reference to accompanying drawing, accompanying drawing is schematic and should not be construed as the present invention is carried out any restriction, in the accompanying drawings:
Fig. 1 shows the structural representation of the measurement system of the engine jet pipe axis of one embodiment of the invention；
Fig. 2 shows the structural representation of engine jet pipe；
Fig. 3 shows the structural representation of lower posture adjustment plate；
Fig. 4 shows the structural representation of leveling mounting；
Fig. 5 shows the schematic diagram of lower posture adjustment plate and leveling mounting abutting joint；
Fig. 6 shows the structural representation of posture adjustment plate；
Fig. 7 shows the scheme of installation of guide post, upper posture adjustment plate and leveling mounting；
Fig. 8 shows bearing mounting structure schematic diagram；；
Fig. 9 shows the structural representation measuring bar；
Figure 10 shows the connection diagram measuring bar with bearing；
Figure 11 shows the scheme of installation of laser displacement sensor；
Figure 12 shows the scheme of installation of angular transducer and leveling mounting；
Figure 13 shows the schematic flow sheet of the measuring method of the engine jet pipe axis of one embodiment of the invention；
Figure 14 shows the schematic diagram of corner-time that angular transducer measures；
Figure 15 shows the schematic diagram of the distance verses time that laser displacement sensor measures；
Figure 16 shows corner-distance relation curve and cuts the schematic diagram of circle；
Figure 17 shows four schematic diagrams cutting circle and nozzle axis.
In Fig. 1-Figure 12:
1 leveling mounting, 2 rotary measurement device；
11 clutch shaft bearings, 12 second bearings, posture adjustment plate, 14 times posture adjustment plates, 15 guide posts on 13；
21 measure bar, 22 angular transducers, 23 laser displacement sensors；
211 rotating shaft bars, 212 exhibition bars；
141 first top nuts, 142 first lower nuts；
131 second top nuts, 132 second lower nuts；
211 ' threaded connection holes.
Detailed description of the invention
Below in conjunction with accompanying drawing, embodiments of the present invention is described in detail.
Fig. 1 shows the structural representation of the measurement system of the engine jet pipe axis of one embodiment of the invention.As shown in Fig. 1-Figure 12, the measurement system of this engine jet pipe axis includes:
Leveling mounting 1 and rotary measurement device 2；
Rotary measurement device 2 includes measuring bar 21, measures bar 21 circumference rotation；
Measure bar 21 and be provided with angular transducer 22 and multiple laser displacement sensor 23；
Multiple laser displacement sensors 23 are positioned on the differing heights measuring bar 21, for measuring the nozzle wall radial distance with corresponding laser displacement sensor；
Angular transducer 22 is positioned on measurement bar 21, for measuring the anglec of rotation of bar 21；
Measure bar 21 and be vertically arranged on leveling mounting 1；
Leveling mounting 1 contacts with the spout of engine jet pipe.
The measurement system of the engine jet pipe axis of the present embodiment, achieve the non-contact measurement to engine jet pipe axis, avoid the damage that nozzle wall is caused by contact type measurement, the radial distance of multiple sections of circles of engine jet pipe inwall is obtained by multiple laser displacement sensors, the anglec of rotation measuring bar is obtained by angular transducer, the anglec of rotation of the radial distance according to multiple sections of circles and measurement bar obtains the axis of jet pipe, and measurement result is accurate.
In the optional embodiment of one, this engine jet pipe system for measuring axes also includes signal record and processor (not shown)；
Signal record is connected with angular transducer 22 and multiple laser displacement sensor 23 with processor, obtains the axis of described jet pipe with the anglec of rotation of the radial distance of corresponding laser displacement sensor and described measurement bar 21 for the inwall according to described jet pipe.
In actual applications, use two power supplies to power to laser displacement sensor and angular transducer respectively, use a signal recorder recording laser displacement and angle signal.
Further, leveling mounting 1 includes clutch shaft bearing 11 and the second bearing 12；
Measure bar 21 and include rotating shaft bar 211 and multiple exhibition bar 212；
Rotating shaft bar 211 is vertically arranged on leveling mounting 1 through clutch shaft bearing 11 and the second bearing 12；
Multiple laser displacement sensors 23 are respectively arranged on multiple exhibition bar 212.
Further, angular transducer 22 is positioned at the bottom of rotating shaft bar 211, and the rotating shaft of angular transducer 22 is connected with the axle center of rotating shaft bar 211.
The measurement system of the engine jet pipe axis of the present embodiment solves the internal same section of circle continuous multimetering problem of jet pipe and non-contact measurement problem.
Preferably, leveling mounting 1 be shaped as triangle.Measure on the predetermined central axis of the measurement system that bar 21 is positioned at engine jet pipe axis.
The measurement system of this engine jet pipe axis also includes: three upper posture adjustment plates 13 and three guide posts 15；
Upper posture adjustment plate 13 is arranged on leveling mounting 1, and for contacting with the spout of engine jet pipe, regulation spout is in level；
Three guide posts 15 are vertically arranged on three the upper posture adjustment plate 13 positions away from described measurement bar 21 respectively, play the guiding role with the placement to engine jet pipe.
The measurement system of this engine jet pipe axis also includes: three lower posture adjustment plates (14)；
Described three lower posture adjustment plates (14) are arranged at the bottom of described leveling mounting (1), are used for regulating leveling mounting (1) and are in level.
In actual applications, measuring bar to be formed by a rotating shaft bar and some exhibition bar vertical weldings, rotating shaft bar is placed on leveling mounting by socket bearing, measures bar and can realize rotating continuously around bearing, exhibition boom end installs laser displacement sensor, rotating shaft bar lower end connection angle sensor.Lower posture adjustment plate is used for adjusting whole measurement system and is in level.Upper posture adjustment plate is for laying the spout of engine jet pipe, and the spout plane adjusting engine jet pipe (as shown in Figure 2) is in level.Guide post play the guiding role when engine jet pipe docks with upper posture adjustment plate.
The screw rod of lower posture adjustment plate 14 (as shown in Figure 3) passes leveling mounting 1 base (as shown in Figure 4) through hole, use first top nut the 141, second lower nut 142 to grip (as described in Figure 5), rotated by nut and adjust mounting upper end surface in level.The screw rod of upper posture adjustment plate 13 (as shown in Figure 6) passes leveling mounting 1 footstock through hole, uses first top nut the 131, second lower nut 132 to grip (as shown in Figure 7).Guide post 15 is screwed onto on leveling mounting 1, for controlling jet pipe and the directivity in upper posture adjustment plate 13 docking operation.
In the middle part of leveling mounting 1, machined counterbore, be used for laying upper and lower each bearing, use radial screw to ensure bearing and leveling mounting 1 tight fit (as shown in Figure 8).Measuring the rotating shaft bar 211 of bar 21 (as shown in Figure 9) and went here and there the internal diameter of two bearings, rotating shaft bar 211 and bearing inner ring slightly tight fit, the convex on rotating shaft bar is pressed on the internal ring of upper bearing (metal) (as shown in Figure 10)；The length of exhibition bar 212 is advantageously according to the size adjusting of described engine jet pipe, and owing to jet pipe is taper, up-narrow and down-wide, therefore, the length of the multiple exhibition bars shown in Fig. 9 increases the most successively.The measurement system of this nozzle axis, measuring system integral level state can be by lower posture adjustment plate leveling, and the level of tested object can realize wheel measuring by measuring bar around bearing rotary by upper posture adjustment plate leveling.
The internal mesh generation of circle quantity, the measurement distance of laser displacement and engine jet pipe that cuts measured as required measures the size of bar 21, ensure measurement bar 21 is smaller in size than the internal shape face of jet pipe, even if measuring the height height less than jet pipe of bar 21, make to open up on measurement bar the radius being generally less than jet pipe of the length of bar 211, in making to measure, swinging mounting is without impinging on nozzle wall, and meets laser displacement measurement distance.
The exhibition bar 211 measuring bar 21 is installed laser displacement sensor 23.Laser displacement sensor 23 is connected (as shown in figure 11) by the threaded connection hole 211 ' of processing on exhibition bar 211 is fixing with measurement bar 21, and laser displacement sensor 23 sends the distance between laser measurement sensor and nozzle wall.Measure the shape of bar and the quantity of laser displacement sensor to cut circle quantity adjust according to interior shape and the measurement of jet pipe.
Angular transducer 22 housing is arranged on leveling mounting 1, and the test rotating shaft of angular transducer 22 is connected (as shown in figure 12) with rotating shaft bar 211 axle center measuring bar 21, for measuring the angle that bar rotates.
In actual applications, engine jet pipe is laid as follows with the process of leveling: use crane that jet pipe is sling, engine jet pipe mouth down, jet pipe slowly falls, docking operation is observed nozzle hole outline edge consistent with three guide post distances, nozzle hole is finally adjacent to posture adjustment plate, jet pipe and upper posture adjustment plate not relative motion.
By rotating the nut of upper posture adjustment plate so that upper posture adjustment plate lifting, use horizon rule to measure nozzle hole angle, thus adjustable jet tube mouth is in level.
Connecting power supply to sensor, and connect signal recorder, check that laser displacement sensor sends laser beam, recorder can normally receive the displacement signal of laser displacement sensor and the angle signal of angular transducer, can carry out nozzle axis and measure.During measuring, use the most at the uniform velocity rotary motion support, revolve measurement of turning around and terminate.Check measurement is to whole laser displacement data and angle data.
According to laser displacement measurement data and outer corner measurement data, using method of least square, matching obtains the center of circle of each section of circle, connects each section of round gains in depth of comprehension to nozzle axis.
Figure 13 shows the schematic flow sheet of the measuring method of the engine jet pipe axis of one embodiment of the invention.As shown in figure 13, the measuring method of the engine jet pipe axis of this embodiment includes:
S131: obtain the radial distance of nozzle wall and corresponding laser displacement sensor；
S132: obtain the anglec of rotation measuring bar；
S133: obtain the center of circle of multiple sections of circles according to the inwall of described jet pipe with the anglec of rotation of the radial distance of corresponding laser displacement sensor and described measurement bar, connects each section of round heart and obtains engine jet pipe axis.
Further, the described center of circle obtaining multiple sections of circles according to the inwall of described jet pipe with the anglec of rotation of the radial distance of corresponding laser displacement sensor and described measurement bar, including:
Use least square fitting method that the inwall of described jet pipe is fitted with the anglec of rotation of the radial distance of corresponding laser displacement sensor and described measurement bar, obtain the center of circle of multiple sections of circles.
Below in conjunction with a specific embodiment, the measuring method of the engine jet pipe axis of the present invention is introduced.
The first step: swinging mounting designs
Require that measuring internal four of jet pipe cuts circle, using four circle center line connectings cutting circle as nozzle axis.The measurement distance of the laser displacement sensor selected is 80mm-300mm, and according to the internal mesh generation swinging mounting of jet pipe, see Fig. 9, measure internal less than jet pipe section of circular diameter about 260mm of exhibition pole length of bar, distance nozzle wall face about 130mm on the exhibition bar of bar is measured when laser displacement sensor is arranged on, meet the measurement distance of laser displacement sensor, it is ensured that swinging mounting and laser displacement sensor will not encounter nozzle wall.
Second step: build rotary measurement device
Lower posture adjustment plate screw rod passes leveling mounting base plate through holes, uses upper and lower nut to grip, and is rotated by nut and adjusts mounting upper end surface in level.Upper posture adjustment plate screw rod passes mounting footstock through hole, uses upper and lower nut to grip.Guide post is screwed onto on mounting, sees Fig. 7.
Two bearings are placed in the counterbore in the middle part of leveling mounting, by the radial screw on leveling mounting, and outer race of extruding so that bearing and mounting tight fit, see Fig. 9.The rotating shaft bar string measuring bar crosses the internal diameter of two bearings, and the convex on swinging mounting rotating shaft bar is pressed on the internal ring of upper bearing (metal), and the gap between rotating shaft bar and lower bearing internal diameter is eliminated by plug tagger so that rotating shaft bar and bearing bore diameter tight fit, sees Figure 11.
3rd step: sensor is installed
The exhibition boom end measuring bar is installed laser displacement sensor.By measuring, the threaded connection hole of processing on bar is fixing with measurement bar to be connected laser displacement sensor, and the direction of laser is axial for exhibition bar, sees Figure 11.
Angle sensor shell is arranged on mounting, and the test rotating shaft of angular transducer is connected with measuring bar axle center, sees Figure 12, for measuring the angle that bar rotates.
4th step: engine jet pipe is laid and leveling
Using crane that jet pipe is sling, engine jet pipe mouth down, jet pipe slowly falls, and observes nozzle hole profile with three guide posts apart from consistent in docking operation, and nozzle hole is finally adjacent to posture adjustment plate, jet pipe and upper posture adjustment plate not relative motion.
By rotating the nut of upper posture adjustment plate so that upper posture adjustment plate lifting, use horizon rule to measure nozzle hole angle, thus adjustable jet tube mouth is in level.
5th step, engine jet pipe cuts round radial distance and rotation angle measurement
Connecting power supply to sensor, and connect signal recorder, check that laser displacement sensor sends laser beam, recorder can normally receive the displacement signal of laser displacement sensor and the angle signal of angular transducer, can carry out nozzle axis and measure.During measuring, use the most at the uniform velocity rotary motion support, revolve measurement of turning around and terminate.Check measurement is to angle data (see Figure 14) and whole laser displacement data.
6th step: engine jet pipe axis-line analysis
Laser displacement measurement data obtain jet pipe inner laser point (cutting on circle) and rotating shaft distance r (see Figure 15) plus sensor mount point and rotating shaft distance.The measurement data unit of corner is degree, needs to be converted into radian w, according to distance r and corner w, uses method of least square, and matching obtains each section of circle and the center of circle, corner-distance relation curve and section circle (fitting circle) and Figure 16 is seen in the center of circle.Used least square fitting by distance r and corner w, obtain cutting circle and the center of circle.Connecting each section of round gains in depth of comprehension to nozzle axis, Figure 17 shows that four are cut circle and nozzle axis.
The system and method for measuring of the engine jet pipe axis that the present invention proposes can be additionally used in other shaft centerline measurement rotating housing component and roundness measurement.
The measurement system and method for the engine jet pipe axis that the present invention proposes, achieve the non-contact measurement to engine jet pipe axis, avoid the damage that nozzle wall is caused by contact type measurement, the radial distance of multiple sections of circles of engine jet pipe inwall is obtained by multiple laser displacement sensors, the anglec of rotation measuring bar is obtained by angular transducer, the anglec of rotation of the radial distance according to multiple sections of circles and measurement bar obtains the axis of jet pipe, and measurement result is accurate.
Although being described in conjunction with the accompanying embodiments of the present invention, but those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, within the scope of such amendment and modification each fall within and be defined by the appended claims.
Claims (10)
1. the measurement system of an engine jet pipe axis, it is characterised in that including:
Leveling mounting (1) and rotary measurement device (2)；
Described rotary measurement device (2) includes measuring bar (21), described measurement bar (21) week
To rotation；
Described measurement bar (21) is provided with angular transducer (22) and multiple laser displacement sensing
Device (23)；
The plurality of laser displacement sensor (23) is positioned at the different high of described measurement bar (21)
On degree, for measuring the nozzle wall radial distance with corresponding laser displacement sensor；
Described angular transducer (22) is positioned on described measurement bar (21), is used for measuring described
Measure the anglec of rotation of bar (21)；
Described measurement bar (21) is vertically arranged on described leveling mounting (1)；
Described leveling mounting (1) contacts with the spout of engine jet pipe.
The measurement system of engine jet pipe axis the most according to claim 1, its feature exists
In, also include signal record and processor；
Described signal record and processor and described angular transducer (22) and multiple laser displacement
Sensor (23) is connected, for sensing with corresponding laser displacement according to the inwall of described jet pipe
The radial distance of device and the anglec of rotation of described measurement bar (21) obtain the axis of described jet pipe.
The measurement system of engine jet pipe axis the most according to claim 1, its feature exists
In, described leveling mounting (1) includes clutch shaft bearing (11) and the second bearing (12)；
Described measurement bar (21) includes rotating shaft bar (211) and multiple exhibition bar (212)；
Described rotating shaft bar (211) passes described clutch shaft bearing (11) and described second bearing (12)
It is vertically arranged on described leveling mounting (1)；
The plurality of laser displacement sensor (23) is respectively arranged at the plurality of exhibition bar (212)
On.
The measurement system of engine jet pipe axis the most according to claim 3, its feature exists
In,
Described angular transducer (22) is positioned at the bottom of described rotating shaft bar (211), described angle
The rotating shaft of degree sensor (22) is connected with the axle center of described rotating shaft bar (211).
The measurement system of engine jet pipe axis the most according to claim 3, its feature exists
It is shaped as triangle in, described leveling mounting (1).
The measurement system of engine jet pipe axis the most according to claim 3, its feature exists
In, described measurement bar (21) is positioned at the pre-centration axis of the measurement system of engine jet pipe axis
On line.
The measurement system of engine jet pipe axis the most according to claim 3, its feature exists
In, also include:
Three upper posture adjustment plates (13) and three guide posts (15)；
Described upper posture adjustment plate (13) is arranged on described leveling mounting (1), is used for and starts
The spout of machine jet pipe contacts, and regulation spout is in level；
Described three guide posts (15) are vertically arranged in described three upper posture adjustment plates (13) respectively
On position away from described measurement bar (21), it play the guiding role with the placement to engine jet pipe.
The measurement system of engine jet pipe axis the most according to claim 3, its feature exists
In, also include:
Three lower posture adjustment plates (14)；
Described three lower posture adjustment plates (14) are arranged at the bottom of described leveling mounting (1), use
It is in level in regulation leveling mounting (1).
9. the measurement system of the engine jet pipe axis that a kind utilizes described in any one of claim 1-8
The measuring method of the engine jet pipe axis of system, it is characterised in that including:
Obtain the radial distance of nozzle wall and corresponding laser displacement sensor；
Obtain the anglec of rotation measuring bar；
The radial distance of the inwall according to described jet pipe and corresponding laser displacement sensor and institute
The anglec of rotation stating measurement bar obtains the center of circle of multiple sections of circles, connects each section of round heart acquisition and starts
Machine nozzle axis.
The measuring method of engine jet pipe axis the most according to claim 9, its feature
It is, the radial distance of the described inwall according to described jet pipe and corresponding laser displacement sensor
With the center of circle that the anglec of rotation of described measurement bar obtains multiple sections of circles, including:
Use least square fitting method that the inwall of described jet pipe is sensed with corresponding laser displacement
The radial distance of device and the anglec of rotation of described measurement bar are fitted, and obtain the circle of multiple sections of circles
The heart.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106338262A (en) * | 2016-11-07 | 2017-01-18 | 哈尔滨电机厂有限责任公司 | Method for measuring included angle of jet flow of impact type water turbine |
| CN108195338A (en) * | 2018-02-14 | 2018-06-22 | 国家电网公司 | A kind of shaft centerline measurement device and method |
| CN108444346A (en) * | 2018-02-23 | 2018-08-24 | 中国科学院西安光学精密机械研究所 | Device and method for leading out center line of revolving body |
| CN111121709A (en) * | 2019-12-26 | 2020-05-08 | 湖北航天技术研究院总体设计所 | System and method for measuring thrust line of small-size large-expansion-ratio nozzle engine |
| CN112596411A (en) * | 2020-12-10 | 2021-04-02 | 内蒙航天动力机械测试所 | Semi-physical control method for cold pendulum of solid rocket engine jet pipe |
| CN114046752A (en) * | 2021-10-25 | 2022-02-15 | 湖南三一石油科技有限公司 | Drill rod detection method, electronic equipment and storage medium |
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