CN115307543A - Device and method for measuring geometric dimension of inner cavity of large-sized high-speed rotating equipment - Google Patents
Device and method for measuring geometric dimension of inner cavity of large-sized high-speed rotating equipment Download PDFInfo
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- CN115307543A CN115307543A CN202210823536.8A CN202210823536A CN115307543A CN 115307543 A CN115307543 A CN 115307543A CN 202210823536 A CN202210823536 A CN 202210823536A CN 115307543 A CN115307543 A CN 115307543A
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- linear grating
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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
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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
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
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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
- G01B11/08—Measuring arrangements characterised by the use of optical techniques for measuring diameters
Abstract
A device and a method for measuring the geometric dimension of an inner cavity of large-scale high-speed rotation equipment relate to a measuring device and a measuring method. The invention aims to solve the problems that a high-precision three-coordinate measuring device is high in manufacturing cost and is not beneficial to being widely applied to large-scale high-speed rotary equipment production plants. The measuring device comprises a base, an air floatation rotary table, a lifting table, a triangular optical sensor, an upright post and a lifting distance measuring mechanism; the air supporting revolving stage is installed at the upper surface of base, and the elevating platform is installed on the air supporting revolving stage, and triangle light sensor installs on the elevating platform, and triangle light sensor's laser emergence department is located the center of elevating platform, and the vertical setting of stand is in one side of air supporting revolving stage, and the lower extreme of stand and the last fixed surface of base are connected, lift distance measuring mechanism installs on the stand, the elevating platform pass through the rigidity steel wire with lift distance measuring mechanism connects. The invention belongs to the field of machinery.
Description
Technical Field
The invention relates to a measuring device and a measuring method, and belongs to the field of machinery.
Background
The aeroengine transfers torque through the matching of the inner cavity of the large-sized high-speed rotation equipment and the turbine shaft, and the mechanical property after the assembly is an important factor influencing the dynamic property of the large-sized high-speed rotation equipment, because the assembly rigidity of the large-sized high-speed rotation equipment is influenced by the surface jumping and geometric errors of the inner cavity and the turbine shaft, and the assembly property of the large-sized high-speed rotation equipment is further influenced. The interference magnitude and the assembly rigidity of the large-scale high-speed rotating equipment matched with the radial surface of the turbine shaft are determined by parameters such as the diameter and the jumping of the inner cavity of the large-scale high-speed rotating equipment. The inner cavity of large-scale high-speed rotary equipment for aeroengine usually adopts a three-coordinate measuring machine to measure parameters such as inner cavity jumping, diameter, height and the like, but the high-precision three-coordinate measuring machine has high manufacturing cost, and the high-precision three-coordinate measuring machine which can continuously measure the parameters is more expensive, so that the large-scale high-speed rotary equipment is not suitable for being widely applied in large-scale high-speed rotary equipment production plants. Therefore, in order to improve the measurement accuracy of the geometric dimension of the inner cavity of the large-sized high-speed rotation equipment and improve the assembly performance of the large-sized high-speed rotation equipment and the turbine shaft, it is necessary to design a device and a method for measuring the geometric dimension of the inner cavity of the large-sized high-speed rotation equipment with high accuracy and low manufacturing cost.
Disclosure of Invention
The invention provides a device and a method for measuring the geometric dimension of an inner cavity of large-sized high-speed rotary equipment, aiming at solving the problems that a high-precision three-coordinate measuring device is high in manufacturing cost and not beneficial to being widely applied to large-sized high-speed rotary equipment production plants.
The technical scheme adopted by the invention for solving the problems is as follows: the measuring device comprises a base, an air floatation rotary table, a lifting table, a triangular optical sensor, an upright post and a lifting distance measuring mechanism; the air supporting revolving stage is installed at the upper surface of base, and the elevating platform is installed on the air supporting revolving stage, and triangle light sensor installs on the elevating platform, and triangle light sensor's laser emergence department is located the center of elevating platform, and the vertical setting of stand is in one side of air supporting revolving stage, and the lower extreme of stand and the last fixed surface of base are connected, lift distance measuring mechanism installs on the stand, the elevating platform pass through the rigidity steel wire with lift distance measuring mechanism connects.
Furthermore, the lifting distance measuring mechanism comprises a linear grating, a linear grating reading head and a vertical guide rail; the linear grating is attached to the side wall of the stand column, the linear grating is parallel to the axis of the stand column along the central line of the length direction, the vertical guide rail is installed on the stand column and can move up and down linearly, and the linear grating reading head is installed on the vertical guide rail.
Furthermore, the central axis of the lifting platform coincides with the geometric revolving axis of the air-floating rotary table.
The measuring method comprises the following specific steps:
placing large-scale high-speed rotation equipment on an air floatation rotary table, and fixing a triangular optical sensor at the center of a lifting table;
step two, sticking the linear grating on the upright column, fixing a linear grating reading head on the vertical guide rail, and enabling the linear grating reading head to read the scale of the linear grating;
step three, connecting the lifting platform with the vertical guide rail through a rigid steel wire to ensure that the lifting distance of the lifting platform is equal to the descending distance of the vertical guide rail;
driving the triangular optical sensor to move from bottom to top by the lifting platform, driving the linear grating reading head to move from top to bottom by the vertical guide rail, and reading the scale of the linear grating in real time by the linear grating reading head;
fifthly, laser emitted by the triangular light sensor is irradiated on the inner wall of the large-scale high-speed rotation equipment, the laser reflected by the inner wall of the large-scale high-speed rotation equipment is transmitted to the triangular light sensor, and an image is formed on the photosensitive sheet;
step six, calculating a bounce value of the large-scale high-speed rotation equipment, the radius of an inner cavity of the large-scale high-speed rotation equipment and the diameter of the large-scale high-speed rotation equipment according to the imaging position of the triangular optical sensor in the step five;
and step seven, reading each numerical value of the triangular sensor in normal imaging from the linear grating by the linear grating reading head.
Further, in the sixth step, the distance x between the inner wall of the large-sized high-speed rotation equipment and the triangular light sensor is obtained according to the imaging position of the triangular sensor in the fifth step, and the large-sized heightIn the process that the quick rotation equipment rotates along with the air floatation rotary table, the triangular light sensor obtains n distance values x i And the maximum value is x max Minimum value is denoted x min Then, the runout of the large-sized high-speed rotation equipment is as follows:
Δx＝x max -x min ①，
the radius of the inner cavity of the large-scale high-speed rotation equipment is as follows:
the diameter of the large-scale high-speed rotation equipment is as follows:
furthermore, in the seventh step, the linear grating reading head reads the distance h from the linear grating when the triangular sensor normally images A The distance traveled by the linear grating reading head when the triangular sensor is read from the linear grating and suddenly changed or not imaged during normal imaging is recorded as h 1 The thickness of the rib plate in the inner cavity of the large-scale high-speed rotation equipment is h A The thickness between the rib plates is h 1 。
The invention has the beneficial effects that: the invention can realize the ultra-precise measurement of the size of the inner cavity of the large-scale high-speed rotating equipment with a complex structure, and the invention realizes the measurement of the axial distance and the radial distance by the laser sensor and the grating ruler. The invention can realize the axial and radial measurement of the inner cavity of the large-scale high-speed rotating equipment, the measurement reference is provided by the rotary table, the measurement height is provided by the linear grating, and the measurement precision is high. The diameter of the inner cavity of the large-sized high-speed rotating equipment is measured by rotating the triangular optical sensor and the high-speed rotating equipment on the rotary table, and the measuring effect is not influenced by the installation error of the triangular optical sensor. Meanwhile, the wide application of the device can solve the problem of high cost of the high-progress three-coordinate measuring machine, great economic benefit is generated, and the device has a considerable effect on the development of the manufacturing industry.
Drawings
FIG. 1 is a schematic view of the structure of the measuring device of the present invention;
fig. 2 is a schematic diagram of the measurement requirements of the inner cavity of the large-scale high-speed rotation equipment.
Detailed Description
The first embodiment is as follows: the embodiment is described with reference to fig. 1 and 2, and the device for measuring the geometric dimension of the inner cavity of the large-sized high-speed rotation equipment in the embodiment comprises a base 1, an air flotation turntable 2, a lifting table 3, a triangular optical sensor 4, an upright post 6 and a lifting distance measuring mechanism; air supporting revolving stage 2 is installed at the upper surface of base 1, and elevating platform 3 is installed on air supporting revolving stage 2, and triangle light sensor 4 is installed on elevating platform 3, and the laser of triangle light sensor 4 takes place the center that the department is located elevating platform 3, and the vertical setting of stand 6 is in one side of air supporting revolving stage 2, and the lower extreme of stand 6 and the last fixed surface of base 1 are connected, lift distance measurement mechanism installs on stand 6, elevating platform 3 through the rigidity steel wire with lift distance measurement mechanism connects.
The second embodiment is as follows: the embodiment is described with reference to fig. 1 and fig. 2, and the lifting distance measuring mechanism of the device for measuring the geometric dimension of the inner cavity of the large-scale high-speed rotating equipment in the embodiment comprises a linear grating 7, a linear grating reading head 8 and a vertical guide rail 9; the linear grating 7 is attached to the side wall of the stand column 6, the central line of the linear grating 7 in the length direction is parallel to the axis of the stand column 6, the vertical guide rail 9 is installed on the stand column 6, the vertical guide rail 9 can linearly move up and down on the stand column 6, and the linear grating reading head 8 is installed on the vertical guide rail 9. Other components and connections are the same as those in the first embodiment.
The third concrete implementation mode: the present embodiment will be described with reference to fig. 1 and 2, and the central axis of the lifting table 3 of the apparatus for measuring the geometric dimension of the inner cavity of a large-sized high-speed rotating equipment according to the present embodiment coincides with the geometric rotation axis of the air floating rotary table 2. Other components and connections are the same as those in the first embodiment.
The fourth concrete implementation mode: the embodiment is described with reference to fig. 1 and fig. 2, and the method for measuring the geometric dimension of the inner cavity of the large-sized high-speed rotating equipment in the embodiment is implemented by the following steps:
step one, placing a large-scale high-speed rotating device 5 on an air floatation rotary table 2, and fixing a triangular optical sensor 4 at the center of a lifting table 3;
step two, attaching the linear grating 7 to the upright post 6, fixing the linear grating reading head 8 on the vertical guide rail 9, and enabling the linear grating reading head 8 to read the scale of the linear grating 7;
step three, connecting the lifting platform 3 with the vertical guide rail 9 through a rigid steel wire, and ensuring that the ascending distance of the lifting platform 3 is equal to the descending distance of the vertical guide rail 9;
fourthly, the lifting platform 3 drives the triangular optical sensor 4 to move from bottom to top, the vertical guide rail 9 drives the linear grating reading head 8 to move from top to bottom, and the linear grating reading head 8 reads the scale of the linear grating 7 in real time;
fifthly, the laser emitted by the triangular light sensor 4 is irradiated on the inner wall of the large-scale high-speed rotation equipment 5, the laser reflected by the inner wall of the large-scale high-speed rotation equipment 5 is transmitted to the triangular light sensor 4, and an image is formed on a photosensitive sheet;
step six, calculating a bounce value of the large-scale high-speed rotation equipment 5, the radius of the inner cavity of the large-scale high-speed rotation equipment 5 and the diameter of the large-scale high-speed rotation equipment 5 according to the imaging position of the triangular optical sensor 4 in the step five;
and seventhly, reading each numerical value of the triangular sensor 4 in normal imaging from the linear grating 7 by the linear grating reading head 8.
The fifth concrete implementation mode: in a sixth step of the method for measuring the geometric dimension of the inner cavity of the large-sized high-speed slewing equipment according to the imaging position of the triangular sensor 4 in the fifth step, the distance x between the inner wall of the large-sized high-speed slewing equipment 5 and the triangular optical sensor 4 is obtained, and the triangular optical sensor 4 obtains n distance values x during the rotation of the large-sized high-speed slewing equipment along with the air-floating turntable 2 i And the maximum value is x max Minimum value is denoted x min Then large heightThe jerk of the fast slewing equipment 5 is:
Δx＝x max -x min ①，
the radius of the inner cavity of the large-scale high-speed rotating equipment 5 is as follows:
the diameter of the large-scale high-speed rotating equipment 5 is as follows:
in the embodiment, along with the rising of the lifting platform 3, when the laser of the triangular light sensor 4 is irradiated on the inner wall of the large-sized high-speed rotation equipment 5, the laser is reflected to the triangular light sensor 4 and forms an image, when the laser of the triangular light sensor 4 is irradiated on the middle hole of the two ribs of the large-sized high-speed rotation equipment 5, the distance between the triangular light sensor 4 and the reflecting surface exceeds the self-measuring range due to the measuring range limitation of the triangular light sensor 4, and the reflected light can not appear at the moment.
The sixth specific implementation mode: the embodiment is described with reference to fig. 1 and fig. 2, and in step seven of the method for measuring the geometric dimension of the inner cavity of the large-scale high-speed rotation equipment according to the embodiment, the linear grating reading head 8 reads the distance h from the linear grating 7 when the triangular sensor 4 normally images A The distance traveled by the linear grating reading head 8 when the triangular sensor 4 is suddenly changed or not imaged during normal imaging is read from the linear grating 7 is recorded as h 1 The thickness of the rib plate in the inner cavity of the large-scale high-speed rotation equipment 5 is h A The thickness between the rib plates is h 1 。
Although the present invention has been described with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the scope of the present invention.
Claims (6)
1. The utility model provides a large-scale high-speed gyration is equipped inner chamber geometric dimension measuring device which characterized in that: the device for measuring the geometric dimension of the inner cavity of the large-sized high-speed rotary equipment comprises a base (1), an air floatation rotary table (2), a lifting table (3), a triangular optical sensor (4), an upright post (6) and a lifting distance measuring mechanism; air supporting revolving stage (2) are installed on the upper surface of base (1), and install on air supporting revolving stage (2) elevating platform (3), and triangle optical sensor (4) are installed on elevating platform (3), and the laser of triangle optical sensor (4) takes place the center that the department is located elevating platform (3), and the vertical setting of stand (6) is in one side of air supporting revolving stage (2), and the lower extreme of stand (6) and the last fixed surface of base (1) are connected, lift distance measurement mechanism installs on stand (6), elevating platform (3) through the rigidity steel wire with lift distance measurement mechanism connects.
2. The device for measuring the geometric dimension of the inner cavity of the large-scale high-speed rotating equipment according to claim 1, wherein: the lifting distance measuring mechanism comprises a linear grating (7), a linear grating reading head (8) and a vertical guide rail (9); linear grating (7) paste the dress on the lateral wall of stand (6), and linear grating (7) are parallel with the axis of stand (6) along length direction's central line, and vertical guide (9) are installed on stand (6), and vertical guide (9) can stand (6) straight line reciprocate, and linear grating reading head (8) are installed on vertical guide (9).
3. The device for measuring the geometric dimension of the inner cavity of the large-scale high-speed rotating equipment according to claim 1, wherein: the central axis of the lifting platform (3) is coincided with the geometric rotary axis of the air-floating rotary table (2).
4. A method for measuring the geometric dimension of an inner cavity of large-scale high-speed rotating equipment by using the measuring device of claim 1, which is characterized in that: the method for measuring the geometric dimension of the inner cavity of the large-sized high-speed rotation equipment is realized by the following steps:
step one, large-scale high-speed rotation equipment (5) is placed on an air floatation rotary table (2), and a triangular optical sensor (4) is fixed at the center of a lifting table (3);
step two, attaching the linear grating (7) to the upright post (6), fixing a linear grating reading head (8) on the vertical guide rail (9), and enabling the linear grating reading head (8) to read the scale of the linear grating (7);
step three, connecting the lifting platform (3) with the vertical guide rail (9) through a rigid steel wire to ensure that the ascending distance of the lifting platform (3) is equal to the descending distance of the vertical guide rail (9);
fourthly, the lifting platform (3) drives the triangular optical sensor (4) to move from bottom to top, the vertical guide rail (9) drives the linear grating reading head (8) to move from top to bottom, and the linear grating reading head (8) reads the scale of the linear grating (7) in real time;
fifthly, the laser emitted by the triangular light sensor (4) is irradiated on the inner wall of the large-scale high-speed rotation equipment (5), the laser reflected by the inner wall of the large-scale high-speed rotation equipment (5) is transmitted to the triangular light sensor (4), and an image is formed on a photosensitive sheet;
step six, calculating a jumping value of the large-scale high-speed rotation equipment (5), the radius of an inner cavity of the large-scale high-speed rotation equipment (5) and the diameter of the large-scale high-speed rotation equipment (5) according to the imaging position of the triangular optical sensor (4) in the step five;
and seventhly, reading each numerical value of the triangular sensor (4) in normal imaging from the linear grating (7) by the linear grating reading head (8).
5. The method for measuring the geometric dimension of the inner cavity of the large-scale high-speed rotating equipment according to claim 4, wherein the method comprises the following steps: in the sixth step, the distance x between the inner wall of the large-scale high-speed rotation equipment (5) and the triangular optical sensor (4) is obtained according to the imaging position of the triangular sensor (4) in the fifth step, and the triangular optical sensor (4) obtains n distance values x in the rotation process of the large-scale high-speed rotation equipment along with the air floatation rotary table (2) i Maximum value is denoted as x max Minimum value is denoted x min And the jumping of the large-scale high-speed rotation equipment (5) is as follows:
Δx＝x max -x min ①，
the radius of the inner cavity of the large-scale high-speed rotation equipment (5) is as follows:
the diameter of the large-scale high-speed rotation equipment (5) is as follows:
6. the method for measuring the geometric dimension of the inner cavity of the large-scale high-speed rotating equipment according to claim 4, wherein the method comprises the following steps: in the seventh step, the linear grating reading head (8) reads the distance h traveled by the triangular sensor (4) during normal imaging from the linear grating (7) A The distance traveled by the linear grating reading head (8) when the triangular sensor (4) is suddenly changed or not imaged during normal imaging is read from the linear grating (7) is recorded as h 1 The thickness of the rib plate in the inner cavity of the large-sized high-speed rotating equipment (5) is h A The thickness between the rib plates is h 1 。
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