CN116771579B - In-situ measurement structure of observation rotating wheel of tangential turbine - Google Patents
In-situ measurement structure of observation rotating wheel of tangential turbine Download PDFInfo
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- CN116771579B CN116771579B CN202311034642.9A CN202311034642A CN116771579B CN 116771579 B CN116771579 B CN 116771579B CN 202311034642 A CN202311034642 A CN 202311034642A CN 116771579 B CN116771579 B CN 116771579B
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- 238000012625 in-situ measurement Methods 0.000 title claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 35
- 239000003550 marker Substances 0.000 claims abstract description 12
- 238000005259 measurement Methods 0.000 claims description 13
- 238000013461 design Methods 0.000 claims description 12
- 238000010586 diagram Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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Abstract
The invention relates to the field of tangential hydraulic turbines, and discloses an in-situ measurement structure of an observation runner of a tangential hydraulic turbine. The observation rotating wheel consists of a plurality of water hoppers, a wheel disc and a marker post, wherein the outer edge side of the marker post is provided with a circular arc-shaped bottom surface, a first side plane and a second side plane. And measuring the distances from the outer circular surface of the jet rod to the circular arc bottom surface, the first side plane and the second side plane by using a feeler gauge respectively, and obtaining the relative position deviation of the nozzle and the observation rotating wheel. The measuring structure can accurately measure the relative position deviation of the nozzle and the observation rotating wheel, improve the measuring precision, reduce the measuring error, realize the in-situ measurement of the observation rotating wheel at the using position and provide a reference for the relative position adjustment of the nozzle and the observation rotating wheel.
Description
Technical Field
The invention relates to the field of tangential hydraulic turbines, in particular to an in-situ measurement structure of an observation runner of a tangential hydraulic turbine.
Background
The tangential turbine is a hydraulic prime mover working according to the theorem of motion, and high-speed jet from a nozzle is rushed to the rotating wheel to push the rotating wheel to rotate for doing work, so that energy conversion is completed. The runner of the tangential turbine consists of a wheel disc and a plurality of water buckets, wherein the water buckets are in a symmetrical double-bowl shape, and the symmetrical plane of the double-bowl shape is the central plane of the water bucket. Through observation tests, the complete process of jet flow entering the water bucket is researched, and is an important means for optimizing hydraulic design of the cut-and-impact water turbine. In order to accurately reflect the design development form of the jet flow entering the water bucket, the nozzle is required to be installed at a design position relative to the observation rotating wheel, namely, the distance from the center line of the nozzle to the rotation center line of the observation rotating wheel is required to be equal to a design value, and the center line of the nozzle is required to be located in the center plane of the water bucket. Because the nozzle and the observation rotating wheel are arranged in a relatively independent space, the surface shape of the water bucket is complex, no reference convenient for measurement is provided, the spatial position of the nozzle relative to the observation rotating wheel is difficult to accurately measure by using conventional measuring tools such as a ruler, and the like, and the measuring error is large and the precision is low. Even if the observation wheel replacement tool which is convenient for measurement is installed at the position of the observation wheel, the nozzle position is measured, and when the observation wheel replacement tool is removed to restore the installation of the observation wheel, the installation error of the observation wheel is difficult to avoid. Therefore, an in-situ measurement structure of the observation rotating wheel of the tangential turbine is urgently needed to solve the problem of measuring the relative positions of the nozzle and the observation rotating wheel, realize in-situ measurement of the observation rotating wheel at the use position, improve the measurement precision, reduce the measurement error and provide a reference for the relative position adjustment of the nozzle and the observation rotating wheel.
As shown in fig. 1, which is a schematic diagram of the operation of the tangential turbine, the high-speed jet from the nozzle is directed to the bucket, and the distance from the center line of the nozzle to the rotation center line of the observation wheel is equal to the design value R; as shown in the P-direction view of the schematic diagram of the operation of the tangential turbine of fig. 2, the bucket is bilaterally symmetrical about the center plane of the bucket, and the center line of the nozzle should be located in the center plane of the bucket.
Disclosure of Invention
The invention aims to provide an in-situ measurement structure of an observation runner of a cut-and-stroke water turbine, which can improve measurement accuracy, reduce measurement errors and provide a reference for the adjustment of the relative positions of a nozzle and the observation runner. The technical scheme of the invention is as follows: consists of a nozzle, a jet rod and an observation rotating wheel. The jet rod is fixedly connected with the nozzle through a screw, the diameter of the outer circular surface of the jet rod, which is close to the observation rotating wheel, is d, the unit millimeter is provided, and the center line of the jet rod is collinear with the center line of the nozzle; the observation rotating wheel consists of a plurality of water hoppers, a wheel disc and a marker post, wherein the water hoppers and the marker post are symmetrically distributed on the outer edge of the wheel disc by taking the central line of the outer edge of the wheel disc as the center, the water hoppers are fixedly connected with the wheel disc, the water hoppers are symmetrically double-bowl-shaped, the symmetrical planes of the double-bowl-shaped are the central planes of the water hoppers, the outer edge side of the marker post is provided with a circular arc bottom surface, a first side plane and a second side plane, the central line of the circular arc bottom surface is collinear with the rotation central line of the observation rotating wheel, and the radius of the circular arc bottom surface and the diameter of the outer circular surface of the jet rod meet the following relation:
r+0.5d+0.05=R
Wherein:
r represents the radius of the circular arc bottom surface, and the unit is millimeter;
R represents the design distance from the central line of the nozzle to the rotation central line of the observation rotating wheel, and the unit millimeter;
The distance between the first side plane and the second side plane and the diameter of the outer circular surface of the jet rod satisfy the following relation:
s-d=0.1
Wherein:
s denotes the distance in mm between the first side plane (8) and the second side plane (9).
In the in-situ measurement structure of the observation runner of the cut-and-stroke water turbine, the first side plane and the second side plane are symmetrical and parallel.
In the in-situ measurement structure of the observation runner of the tangential turbine, the central plane of the water bucket is a symmetrical plane of the first side plane and the second side plane.
The beneficial technical effects of the invention are as follows:
1. the measuring precision of the relative positions of the nozzle and the observation rotating wheel is improved: the relative position deviation of the nozzle and the observation rotating wheel can be measured by using the feeler gauge, so that the measurement accuracy is improved, and the measurement error is reduced.
2. The in-situ measurement of the observation rotating wheel at the using position is realized: even if the surface shape of the water bucket is complex and inconvenient to use for measurement, the measuring structure can also realize in-situ measurement of the position of the nozzle relative to the observation rotating wheel and provide a reference for the relative position adjustment of the nozzle and the observation rotating wheel.
Drawings
FIG. 1 is a schematic diagram of the operation of a hydraulic cut turbine;
FIG. 2 is a P-direction view of the schematic diagram of the operation of the hydraulic turbine;
FIG. 3 is a front view of an in-situ measurement structure of an observation wheel of a tangential turbine in accordance with the present invention;
FIG. 4 is a view A-A of an in-situ measurement structure of an observation wheel of a tangential turbine according to the present invention.
The icon illustrates: the device comprises a 1-nozzle, a 2-jet rod, a 3-observation rotating wheel, a 4-water bucket, a 5-wheel disc, a 6-marker post, a 7-circular arc bottom surface, an 8-first side plane and a 9-second side plane;
The design distance from the central line of the R-nozzle to the rotation central line of the observation rotating wheel; r-radius of circular arc bottom surface; d-diameter of the outer circular surface of the jet rod; e-the distance from the outer circular surface of the jet rod to the circular arc bottom surface; s-distance between the first side plane and the second side plane; k1-distance from the outer circular surface of the jet rod to the first side plane; and k 2-distance from the outer circular surface of the jet rod to the second side plane.
Detailed Description
In order to make the technical scheme and beneficial effects of the invention more clear, the technical scheme in the embodiment of the invention is clearly and completely described below with reference to the accompanying drawings. It will be apparent that the following examples are some, but not all, of the embodiments of the invention. Based on the embodiments of the present invention, other embodiments, which a person of ordinary skill in the art would obtain without any inventive effort, are within the scope of the present invention.
Example 1
As shown in fig. 3 and 4, an in-situ measurement structure of an observation runner of a tangential turbine consists of a nozzle 1, a jet rod 2 and an observation runner 3. The jet rod 2 is fixedly connected with the nozzle 1 through a screw, the diameter of the outer circular surface of the jet rod 2, which is close to the observation rotating wheel 3, is d, the unit millimeter, and the center line of the jet rod 2 is collinear with the center line of the nozzle 1; the observation rotating wheel 3 comprises a water bucket 4, a wheel disc 5 and a marker post 6, wherein 3 water buckets 4 are in a group, 2 groups of water buckets 4 are symmetrically distributed on the left side and the right side of the outer edge of the wheel disc 5 and fixedly connected with the wheel disc 5, the water buckets 4 are in a symmetrical double-bowl shape, symmetrical planes of the double-bowl shape are central planes of the water buckets 4, the number of the marker posts 6 is 2, the two symmetrical distribution are arranged on the upper side and the lower side of the outer edge of the wheel disc 5 and fixedly connected with the wheel disc 5 so as to reduce unbalanced force when the observation rotating wheel 3 rotates, the outer edge side of the marker post 6 is provided with an arc-shaped bottom surface 7, a first side plane 8 and a second side plane 9, the central line of the arc-shaped bottom surface 7 is collinear with the rotation central line of the observation rotating wheel 3, and the radius of the arc-shaped bottom surface 7 and the diameter of the outer circular surface of the jet rod 2 meet the following relation:
r+0.5d+0.05=R
Wherein:
r represents the radius of the circular arc-shaped bottom surface 7, and the unit is millimeter;
R represents the design distance from the central line of the nozzle 1 to the rotation central line of the observation runner 3, and the unit is millimeter;
the distance between the first side plane 8 and the second side plane 9 satisfies the following relationship with the outer circumferential surface diameter of the fluidic rod 2:
s-d=0.1
Wherein:
s denotes the distance between the first side plane 8 and the second side plane 9 in millimeters;
The first side plane 8 is symmetrical and parallel to the second side plane 9, and the centre plane of the bucket 4 is the plane of symmetry of the first side plane 8 and the second side plane 9.
In the embodiment, the center line of the nozzle is equivalently prolonged by using the jet rod, so that the measurement is convenient; the radial and axial distances of the jet rod relative to the observation rotating wheel are convenient to measure by designing the circular arc bottom surface, the first side plane and the second side plane.
Example 2
When the in-situ measurement structure of the observation rotating wheel of the tangential turbine is used, relevant parts are installed according to the illustrated positions.
Radial dimension measurement and adjustment, dimension e is measured using a feeler gauge:
When e=0.05, i.e. r+0.5d+e=r, the distance from the center line of the nozzle 1 to the rotation center line of the observation wheel 3 is equal to the design value R;
When e is more than 0.05, namely r+0.5d+e is more than R, the distance from the central line of the nozzle 1 to the rotation central line of the observation rotating wheel 3 is more than a design value R, the deviation value is e-0.05, and the nozzle 1 is adjusted to be close to the rotation central line of the observation rotating wheel 3 until e=0.05;
when e is less than 0.05, namely r+0.5d+e is less than R, the distance from the central line of the nozzle 1 to the rotation central line of the observation rotating wheel 3 is less than the design value R, the deviation value is 0.05-e, and the nozzle 1 is adjusted to be far away from the rotation central line of the observation rotating wheel 3 until e=0.05.
Axial dimension measurement and adjustment, dimensions k1, k2 were measured separately using a feeler gauge:
when k1=k2=0.05, i.e. the centre line of the nozzle 1 is located in the centre plane of the water bucket 4;
When k1 is less than 0.05 and k2 is more than 0.05, namely the central line of the nozzle 1 is not positioned in the central plane of the water bucket 4, the nozzle 1 is biased towards the first side plane 8, the deviation value is k2-0.05, and the nozzle 1 is adjusted towards the direction of the second side plane 9 until k1=k2=0.05;
When k1 is greater than 0.05 and k2 is less than 0.05, that is, the center line of the nozzle 1 is not located in the center plane of the water bucket 4, the nozzle 1 is biased towards the second side plane 9 by a value of k1-0.05, and the nozzle 1 is adjusted towards the first side plane 8 until k1=k2=0.05.
The measuring structure uses the feeler gauge to measure the relative position deviation of the nozzle and the observation rotating wheel, thereby improving the measuring precision and reducing the measuring error; the in-situ measurement of the observation rotating wheel at the using position is realized, and a reference is provided for the relative position adjustment of the nozzle and the observation rotating wheel.
The invention and its embodiments have been described above by way of example only, and the invention is not limited to the embodiments shown in the drawings, but is in any way limited to practice. In summary, if one of ordinary skill in the art is informed by this disclosure, embodiments and examples similar to the technical solution are not creatively devised without departing from the gist of the present invention, and all the embodiments and examples are considered to be within the protection scope of the present invention.
Claims (1)
1. The in-situ measurement structure of the observation rotating wheel of the tangential turbine is characterized by comprising a nozzle (1), a jet rod (2) and an observation rotating wheel (3); the jet rod (2) is fixedly connected with the nozzle (1) through a screw, the diameter of the outer circular surface of the jet rod (2) close to the observation rotating wheel (3) is d, the unit millimeter is provided, and the center line of the jet rod (2) is collinear with the center line of the nozzle (1); the observation rotating wheel (3) is composed of a plurality of water hoppers (4), a wheel disc (5) and a marker post (6), wherein the water hoppers (4) and the marker post (6) are symmetrically distributed on the outer edge of the wheel disc (5) by taking the central line of the outer edge of the wheel disc (5) as the center, the water hoppers (4) are fixedly connected with the wheel disc (5), the symmetrical double-bowl-shaped symmetrical planes are the central planes of the water hoppers (4), the outer edge side of the marker post (6) is provided with a circular arc bottom surface (7), a first side plane (8) and a second side plane (9), the central line of the circular arc bottom surface (7) is collinear with the rotation central line of the observation rotating wheel (3), and the radius of the circular arc bottom surface (7) and the diameter of the outer circular arc surface of the jet rod (2) meet the following relation:
r+0.5d+0.05＝R
Wherein:
r represents the radius of the circular arc bottom surface (7) in millimeters;
r represents the design distance from the central line of the nozzle (1) to the rotation central line of the observation rotating wheel (3), and the unit millimeter;
the distance between the first side plane (8) and the second side plane (9) and the diameter of the outer circular surface of the jet rod (2) satisfy the following relation:
s-d＝0.1
Wherein:
s represents the distance in mm between the first side plane (8) and the second side plane (9);
The first side plane (8) is symmetrical and parallel to the second side plane (9), and the central plane of the water bucket (4) is the symmetrical plane of the first side plane (8) and the second side plane (9);
Axial dimension measurement and adjustment, dimensions k1, k2 were measured separately using a feeler gauge:
k1 represents the distance from the outer circumferential surface of the jet rod (2) to the first side plane (8), in millimeters;
k2 represents the distance from the outer circumferential surface of the jet rod (2) to the second side plane (9), in millimeters;
when k1=k2=0.05, i.e. the centre line of the nozzle (1) is located in the centre plane of the water bucket (4);
When k1 is less than 0.05 and k2 is more than 0.05, namely the central line of the nozzle (1) is not positioned in the central plane of the water bucket (4), the nozzle (1) is biased towards the first side plane (8), the deviation value is k2-0.05, and the direction of the nozzle (1) towards the second side plane (9) is adjusted until k1=k2=0.05;
when k1 is more than 0.05 and k2 is less than 0.05, namely the center line of the nozzle (1) is not positioned in the center plane of the water bucket (4), the nozzle (1) is biased towards the second side plane (9), the bias value is k1-0.05, and the nozzle (1) is adjusted towards the first side plane (8) until k1=k2=0.05.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311034642.9A CN116771579B (en) | 2023-08-17 | 2023-08-17 | In-situ measurement structure of observation rotating wheel of tangential turbine |
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| CN202311034642.9A CN116771579B (en) | 2023-08-17 | 2023-08-17 | In-situ measurement structure of observation rotating wheel of tangential turbine |
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| CN116771579B true CN116771579B (en) | 2024-05-10 |
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| CN113482833A (en) * | 2021-08-12 | 2021-10-08 | 中国华能集团有限公司 | Impulse turbine nozzle needle stroke measurement structure |
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