CN113624108A - Position symmetry degree measuring device for positioning key of steam turbine rotor sleeved impeller and using method thereof - Google Patents
Position symmetry degree measuring device for positioning key of steam turbine rotor sleeved impeller and using method thereof Download PDFInfo
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- CN113624108A CN113624108A CN202110908126.9A CN202110908126A CN113624108A CN 113624108 A CN113624108 A CN 113624108A CN 202110908126 A CN202110908126 A CN 202110908126A CN 113624108 A CN113624108 A CN 113624108A
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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
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/24—Measuring arrangements characterised by the use of mechanical techniques for measuring angles or tapers; for testing the alignment of axes
- G01B5/25—Measuring arrangements characterised by the use of mechanical techniques for measuring angles or tapers; for testing the alignment of axes for testing the alignment of axes
- G01B5/252—Measuring arrangements characterised by the use of mechanical techniques for measuring angles or tapers; for testing the alignment of axes for testing the alignment of axes for measuring eccentricity, i.e. lateral shift between two parallel axes
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Abstract
A position symmetry measuring device for a positioning key of a steam turbine rotor sleeved impeller and a using method thereof relate to a position symmetry measuring device for a steam turbine rotor sleeved impeller and a using method thereof. The invention aims to solve the technical problem that the existing measuring tool cannot measure the position degree of a steam turbine rotor sleeved impeller positioning key relative to an inner hole cross center line after being processed. The invention relates to a position symmetry measuring device for a positioning key of a sleeved impeller of a steam turbine rotor, which consists of a measuring plate, a positioning block, a fixing screw, a positioning screw and a positioning pin; the method can accurately measure the position symmetry of the positioning key of the sleeved impeller of the steam turbine rotor after processing, the precision reaches within 0.03mm, the processing requirement of the positioning key of the sleeved impeller of the rotor is met, the processing precision of the positioning key of the sleeved impeller of the rotor is improved, and the processing quality of a product is ensured; the measuring device designed by the invention has simple structure and convenient operation, is a high-efficiency and practical measuring device and method, and is widely applied to production practice.
Description
Technical Field
The invention relates to a device for measuring the symmetry degree of a steam turbine rotor sleeved with a steam turbine and a using method thereof.
Background
When a turbine rotor is sleeved with an impeller positioning key, a common boring machine is often adopted for processing, a cross center line of an inner hole is firstly drawn on the end face of an impeller, then the position and the size of the positioning key are drawn according to the position of the cross center line, and the processing of the positioning key needs to ensure that the symmetry degree of the positioning key relative to the cross center line of the inner hole of the impeller is within 0.03. After the boring machine is used for machining according to the scribing position, because no object is arranged on the center line of the inner hole and can be measured as a reference, the conventional universal measuring tool cannot measure the position degree of the positioning key relative to the cross center line of the inner hole after machining, the scribing precision is within 0.1mm, the position precision requirement cannot be guaranteed, and the problem that the impeller cannot be normally assembled when the impeller is red due to overlarge deviation of the machining position of the positioning key often occurs.
Disclosure of Invention
The invention provides a device for measuring the position symmetry degree of a positioning key of a steam turbine rotor sleeved impeller and a using method thereof, aiming at solving the technical problem that the existing measuring tool cannot measure the position degree of the positioning key of the steam turbine rotor sleeved impeller relative to a cross center line of an inner hole after being processed.
The invention relates to a position symmetry measuring device for a positioning key of a sleeved impeller of a steam turbine rotor, which consists of a measuring plate 1, a positioning block 2, a fixing screw 3, a positioning screw 4 and a positioning pin 5;
the measuring plate 1 is of an axisymmetric structure, a rectangular through hole 1-1 is arranged in the central area of the measuring plate 1, and one central axis of the rectangular through hole 1-1 is superposed with the central axis of the measuring plate 1; one end of the measuring plate 1 is a big head end, and the other end is a small head end; a groove 1-6 is arranged on one surface of the measuring plate 1 near the small end, two waist-shaped holes 1-7 are arranged on the groove 1-6, the two waist-shaped holes 1-7 are through holes, and the two waist-shaped holes 1-7 are symmetrically arranged along the symmetry axis of the measuring plate 1; two positioning pin holes 1-2 are arranged on the surface of the measuring plate 1 near the big end, and the two positioning pin holes 1-2 are through holes and are symmetrically arranged along the symmetrical axis of the measuring plate 1;
the positioning block 2 is of a T-shaped structure, two fixing screw holes 2-2 are respectively arranged on the surface of the small end of the positioning block 2, and the two fixing screw holes 2-2 are symmetrically arranged and are blind holes; a positioning screw hole 2-1 is arranged at the center of the side face of the large end of the positioning block 2, the positioning screw hole 2-1 is a through hole, and the axis of the positioning screw hole 2-1 is vertical to the axis of the fixing screw hole 2-2; the inner walls of the fixing screw hole 2-2 and the positioning screw hole 2-1 are provided with internal threads;
the two positioning pins 5 are respectively arranged in the two positioning pin holes 1-2; the small end of the positioning block 2 is fixed in a groove 1-6 of the measuring plate 1, and the two fixing screws 3 are respectively fixed in two fixing screw holes 2-2 and two kidney-shaped holes 1-7; the set screw 4 is fixed in the set screw hole 2-1 and the set screw 4 is arranged on the symmetry axis of the measuring plate 1.
The invention discloses a using method of a position symmetry measuring device of a steam turbine rotor sleeved impeller positioning key, which comprises the following steps:
firstly, placing an impeller 6 on a plane, enabling a position key 6-1 to be measured of the impeller 6 to be upward, sleeving a turbine rotor on an impeller positioning key position symmetry measuring device, placing the impeller positioning key position symmetry measuring device on the end face of the impeller 6, enabling a positioning block 2 to be below a measuring plate 1, and enabling a positioning pin 5 to lean against the inner wall of an impeller inner hole 6-2;
rotating the turbine rotor along an impeller inner hole 6-2 to sleeve the impeller positioning key position symmetry measuring device, so that the positioning key 6-1 to be measured is positioned between a first measuring surface 1-4 and a second measuring surface 1-3 of the measuring plate 1, the symmetry axis of the measuring plate 1 is ensured to be superposed with the symmetry axis of the impeller 6, and the positioning screw 4 is screwed down to be propped against the excircle 6-5 of the impeller so that the measuring device is fixed on the end face of the impeller 6;
measuring the distance C between the first processing surface 6-7 and the second measuring surface 1-3 of the positioning key 6-1 to be measured by using a caliper, measuring the distance D between the second processing surface 6-6 and the first measuring surface 1-4 of the positioning key 6-1 to be measured by using the caliper, and calculating two end surface deviation values H, wherein H is (C-D) mm; and determining the eccentricity according to the value, and if the absolute value of H is greater than 0.03mm, re-processing and measuring until the eccentricity meets the requirements of a drawing.
Compared with the prior art, the invention has the following effects:
the method can accurately measure the position symmetry of the positioning key of the sleeved impeller of the steam turbine rotor after processing, the precision reaches within 0.03mm, the processing requirement of the positioning key of the sleeved impeller of the rotor is met, the processing precision of the positioning key of the sleeved impeller of the rotor is improved, and the processing quality of a product is ensured; the measuring device designed by the invention has simple structure and convenient operation, is a high-efficiency and practical measuring device and method, and is widely applied to production practice.
Drawings
Fig. 1 is a plan view of a measurement plate 1 according to a first embodiment;
FIG. 2 is a cross-sectional view taken along line B-B of FIG. 1;
FIG. 3 is a cross-sectional view taken along line A-A of FIG. 1;
fig. 4 is a front sectional view of the positioning block 2 according to the first embodiment;
FIG. 5 is a top view of the turbine rotor assembly impeller positioning key position symmetry measuring apparatus according to the first embodiment;
FIG. 6 is a left side view of FIG. 5;
FIG. 7 is a cross-sectional view taken along line C-C of FIG. 5;
FIG. 8 is a top view of the fifth embodiment of the present invention showing a position symmetry measuring apparatus for a positioning key of an impeller sleeved on a rotor of a turbine;
fig. 9 is a sectional view taken along line a-a of fig. 8.
Detailed Description
The first embodiment is as follows: the embodiment is a device for measuring the position symmetry of a positioning key of an impeller sleeved on a steam turbine rotor, which is shown in fig. 1-7 and specifically comprises a measuring plate 1, a positioning block 2, a fixing screw 3, a positioning screw 4 and a positioning pin 5;
the measuring plate 1 is of an axisymmetric structure, a rectangular through hole 1-1 is arranged in the central area of the measuring plate 1, and one central axis of the rectangular through hole 1-1 is superposed with the central axis of the measuring plate 1; one end of the measuring plate 1 is a big head end, and the other end is a small head end; a groove 1-6 is arranged on one surface of the measuring plate 1 near the small end, two waist-shaped holes 1-7 are arranged on the groove 1-6, the two waist-shaped holes 1-7 are through holes, and the two waist-shaped holes 1-7 are symmetrically arranged along the symmetry axis of the measuring plate 1; two positioning pin holes 1-2 are arranged on the surface of the measuring plate 1 near the big end, and the two positioning pin holes 1-2 are through holes and are symmetrically arranged along the symmetrical axis of the measuring plate 1;
the positioning block 2 is of a T-shaped structure, two fixing screw holes 2-2 are respectively arranged on the surface of the small end of the positioning block 2, and the two fixing screw holes 2-2 are symmetrically arranged and are blind holes; a positioning screw hole 2-1 is arranged at the center of the side face of the large end of the positioning block 2, the positioning screw hole 2-1 is a through hole, and the axis of the positioning screw hole 2-1 is vertical to the axis of the fixing screw hole 2-2; the inner walls of the fixing screw hole 2-2 and the positioning screw hole 2-1 are provided with internal threads;
the two positioning pins 5 are respectively arranged in the two positioning pin holes 1-2; the small end of the positioning block 2 is fixed in a groove 1-6 of the measuring plate 1, and the two fixing screws 3 are respectively fixed in two fixing screw holes 2-2 and two kidney-shaped holes 1-7; the set screw 4 is fixed in the set screw hole 2-1 and the set screw 4 is arranged on the symmetry axis of the measuring plate 1.
The second embodiment is as follows: the first difference between the present embodiment and the specific embodiment is: two opposite inner walls of the rectangular through hole 1-1 are respectively a first measuring surface 1-4 and a second measuring surface 1-3, and the symmetry precision of the first measuring surface 1-4 and the second measuring surface 1-3 relative to the symmetry axis of the measuring plate 1 is within 0.01 mm. The rest is the same as the first embodiment.
The third concrete implementation mode: the present embodiment differs from the first or second embodiment in that: the grooves 1-6 are rectangular structures. The others are the same as in the first or second embodiment.
The fourth concrete implementation mode: the difference between this embodiment mode and one of the first to third embodiment modes is: the positioning pin holes 1-2 are round holes. The rest is the same as one of the first to third embodiments.
The fifth concrete implementation mode: the embodiment is a method for using a device for measuring the position symmetry of an impeller positioning key of a steam turbine rotor bushing, as shown in fig. 8 and 9, and the specific process is as follows:
firstly, placing an impeller 6 on a plane, enabling a position key 6-1 to be measured of the impeller 6 to be upward, sleeving a turbine rotor on an impeller positioning key position symmetry measuring device, placing the impeller positioning key position symmetry measuring device on the end face of the impeller 6, enabling a positioning block 2 to be below a measuring plate 1, and enabling a positioning pin 5 to lean against the inner wall of an impeller inner hole 6-2;
rotating the turbine rotor along an impeller inner hole 6-2 to sleeve the impeller positioning key position symmetry measuring device, so that the positioning key 6-1 to be measured is positioned between a first measuring surface 1-4 and a second measuring surface 1-3 of the measuring plate 1, the symmetry axis of the measuring plate 1 is ensured to be superposed with the symmetry axis of the impeller 6, and the positioning screw 4 is screwed down to be propped against the excircle 6-5 of the impeller so that the measuring device is fixed on the end face of the impeller 6;
measuring the distance C between the first processing surface 6-7 and the second measuring surface 1-3 of the positioning key 6-1 to be measured by using a caliper, measuring the distance D between the second processing surface 6-6 and the first measuring surface 1-4 of the positioning key 6-1 to be measured by using the caliper, and calculating two end surface deviation values H, wherein H is (C-D) mm; and determining the eccentricity according to the value, and if the absolute value of H is greater than 0.03mm, re-processing and measuring until the eccentricity meets the requirements of a drawing.
The invention was verified with the following tests:
test one: the test is a device for measuring the position symmetry of a positioning key of an impeller sleeved on a steam turbine rotor, and as shown in figures 1-7, the device specifically comprises a measuring plate 1, a positioning block 2, a fixing screw 3, a positioning screw 4 and a positioning pin 5;
the measuring plate 1 is of an axisymmetric structure, a rectangular through hole 1-1 is arranged in the central area of the measuring plate 1, and one central axis of the rectangular through hole 1-1 is superposed with the central axis of the measuring plate 1; one end of the measuring plate 1 is a big head end, and the other end is a small head end; a groove 1-6 is arranged on one surface of the measuring plate 1 near the small end, two waist-shaped holes 1-7 are arranged on the groove 1-6, the two waist-shaped holes 1-7 are through holes, and the two waist-shaped holes 1-7 are symmetrically arranged along the symmetry axis of the measuring plate 1; two positioning pin holes 1-2 are arranged on the surface of the measuring plate 1 near the big end, and the two positioning pin holes 1-2 are through holes and are symmetrically arranged along the symmetrical axis of the measuring plate 1; two opposite inner walls of the rectangular through hole 1-1 are respectively a first measuring surface 1-4 and a second measuring surface 1-3, and the symmetry precision of the first measuring surface 1-4 and the second measuring surface 1-3 relative to the symmetry axis of the measuring plate 1 is within 0.01 mm; the grooves 1-6 are rectangular structures; the positioning pin holes 1-2 are round holes;
the positioning block 2 is of a T-shaped structure, two fixing screw holes 2-2 are respectively arranged on the surface of the small end of the positioning block 2, and the two fixing screw holes 2-2 are symmetrically arranged and are blind holes; a positioning screw hole 2-1 is arranged at the center of the side face of the large end of the positioning block 2, the positioning screw hole 2-1 is a through hole, and the axis of the positioning screw hole 2-1 is vertical to the axis of the fixing screw hole 2-2; the inner walls of the fixing screw hole 2-2 and the positioning screw hole 2-1 are provided with internal threads;
the two positioning pins 5 are respectively arranged in the two positioning pin holes 1-2; the small end of the positioning block 2 is fixed in a groove 1-6 of the measuring plate 1, and the two fixing screws 3 are respectively fixed in two fixing screw holes 2-2 and two kidney-shaped holes 1-7; the set screw 4 is fixed in the set screw hole 2-1 and the set screw 4 is arranged on the symmetry axis of the measuring plate 1.
The use method of the position symmetry measuring device for the positioning key of the sleeved impeller of the steam turbine rotor comprises the following steps:
firstly, placing an impeller 6 on a plane, enabling a position key 6-1 to be measured of the impeller 6 to be upward, sleeving a turbine rotor on an impeller positioning key position symmetry measuring device, placing the impeller positioning key position symmetry measuring device on the end face of the impeller 6, enabling a positioning block 2 to be below a measuring plate 1, and enabling a positioning pin 5 to lean against the inner wall of an impeller inner hole 6-2;
rotating the turbine rotor along an impeller inner hole 6-2 to sleeve the impeller positioning key position symmetry measuring device, so that the positioning key 6-1 to be measured is positioned between a first measuring surface 1-4 and a second measuring surface 1-3 of the measuring plate 1, the symmetry axis of the measuring plate 1 is ensured to be superposed with the symmetry axis of the impeller 6, and the positioning screw 4 is screwed down to be propped against the excircle 6-5 of the impeller so that the measuring device is fixed on the end face of the impeller 6;
measuring the distance C between the first processing surface 6-7 and the second measuring surface 1-3 of the positioning key 6-1 to be measured by using a caliper, measuring the distance D between the second processing surface 6-6 and the first measuring surface 1-4 of the positioning key 6-1 to be measured by using the caliper, and calculating two end surface deviation values H, wherein H is (C-D) mm; and determining the eccentricity according to the value, and if the absolute value of H is greater than 0.03mm, re-processing and measuring until the eccentricity meets the requirements of a drawing.
The test method can accurately measure the position symmetry of the positioning key of the sleeved impeller of the steam turbine rotor after processing, the precision reaches within 0.03mm, the processing requirement of the positioning key of the sleeved impeller of the rotor is met, the processing precision of the positioning key of the sleeved impeller of the rotor is improved, and the processing quality of a product is ensured; the measuring device of the experimental design has simple structure and convenient operation, is a high-efficiency and practical measuring device and method, and is widely applied to production practice.
Claims (5)
1. A position symmetry measuring device for a positioning key of an impeller sleeved on a steam turbine rotor is characterized in that the position symmetry measuring device for the positioning key of the impeller sleeved on the steam turbine rotor is composed of a measuring plate (1), a positioning block (2), a fixing screw (3), a positioning screw (4) and a positioning pin (5);
the measuring plate (1) is of an axisymmetric structure, a rectangular through hole (1-1) is formed in the central area of the measuring plate (1), and one central axis of the rectangular through hole (1-1) is superposed with the central axis of the measuring plate (1); one end of the measuring plate (1) is a big head end, and the other end is a small head end; a groove (1-6) is formed in one surface of the measuring plate (1) close to the small end, two waist-shaped holes (1-7) are formed in the groove (1-6), the two waist-shaped holes (1-7) are through holes, and the two waist-shaped holes (1-7) are symmetrically arranged along the symmetry axis of the measuring plate (1); two positioning pin holes (1-2) are formed in the surface of the measuring plate (1) close to the large end, and the two positioning pin holes (1-2) are through holes and are symmetrically arranged along the symmetry axis of the measuring plate (1);
the positioning block (2) is of a T-shaped structure, two fixing screw holes (2-2) are respectively formed in the surface of the small end of the positioning block (2), and the two fixing screw holes (2-2) are symmetrically arranged and are blind holes; a positioning screw hole (2-1) is arranged at the center of the side face of the large end of the positioning block (2), the positioning screw hole (2-1) is a through hole, and the axis of the positioning screw hole (2-1) is vertical to the axis of the fixing screw hole (2-2); the inner walls of the fixing screw hole (2-2) and the positioning screw hole (2-1) are provided with internal threads;
the two positioning pins (5) are respectively arranged in the two positioning pin holes (1-2); the small end of the positioning block (2) is fixed in a groove (1-6) of the measuring plate (1), and the two fixing screws (3) are respectively fixed in the two fixing screw holes (2-2) and the two kidney-shaped holes (1-7); the positioning screw (4) is fixed in the positioning screw hole (2-1) and the positioning screw (4) is arranged on the symmetry axis of the measuring plate (1).
2. The steam turbine rotor bushing impeller positioning key position symmetry degree measuring device according to claim 1, characterized in that two opposite inner walls of the rectangular through hole (1-1) are respectively a first measuring surface (1-4) and a second measuring surface (1-3), and the symmetry precision of the first measuring surface (1-4) and the second measuring surface (1-3) relative to the symmetry axis of the measuring plate (1) is within 0.01 mm.
3. The steam turbine rotor set impeller positioning key position symmetry measuring device according to claim 1, characterized in that the grooves (1-6) are rectangular in structure.
4. The steam turbine rotor bushing impeller location symmetry degree measuring device of claim 1, characterized in that the locating pin hole (1-2) is a round hole.
5. The method for using the device for measuring the position symmetry of the positioning key of the impeller sleeved with the rotor of the steam turbine as claimed in claim 1, wherein the specific process of the method for measuring the position symmetry of the positioning key of the impeller sleeved with the rotor of the steam turbine is as follows:
firstly, an impeller (6) is placed on a plane, a position key (6-1) to be measured of the impeller (6) is upward, a turbine rotor is sleeved with an impeller positioning key position symmetry degree measuring device and placed on the end face of the impeller (6), a positioning block (2) is arranged below a measuring plate (1), and a positioning pin (5) abuts against the inner wall of an inner hole (6-2) of the impeller;
rotating a turbine rotor along an impeller inner hole (6-2) to sleeve an impeller positioning key position symmetry degree measuring device, enabling a positioning key (6-1) to be measured to be located between a first measuring surface (1-4) and a second measuring surface (1-3) of a measuring plate (1), ensuring that the symmetry axis of the measuring plate (1) is overlapped with the symmetry axis of an impeller (6), and screwing a positioning screw (4) to prop against the outer circle (6-5) of the impeller so as to enable the measuring device to be fixed on the end face of the impeller (6);
thirdly, measuring the distance C between the first processing surface (6-7) and the second measuring surface (1-3) of the position key (6-1) to be measured by using a caliper, measuring the distance D between the second processing surface (6-6) and the first measuring surface (1-4) of the position key (6-1) to be measured by using the caliper, and calculating two end surface deviation values H, wherein H is (C-D) mm; and determining the eccentricity according to the value, and if the absolute value of H is greater than 0.03mm, re-processing and measuring until the eccentricity meets the requirements of a drawing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110908126.9A CN113624108B (en) | 2021-08-09 | 2021-08-09 | Device for measuring symmetry degree of positioning key position of turbine rotor sleeve impeller and application method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110908126.9A CN113624108B (en) | 2021-08-09 | 2021-08-09 | Device for measuring symmetry degree of positioning key position of turbine rotor sleeve impeller and application method thereof |
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| CN113624108A true CN113624108A (en) | 2021-11-09 |
| CN113624108B CN113624108B (en) | 2023-10-10 |
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| CN209214480U (en) * | 2019-01-25 | 2019-08-06 | 常州市南方驱动技术有限公司 | Gear inner hole key slot symmetry detection is advised with function |
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2021
- 2021-08-09 CN CN202110908126.9A patent/CN113624108B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201715993U (en) * | 2010-05-14 | 2011-01-19 | 中钢集团邢台机械轧辊有限公司 | Instrument for measuring symmetry degree of symmetrical keyways |
| CN104266558A (en) * | 2014-09-16 | 2015-01-07 | 西安法士特汽车传动有限公司 | Internal tooth and external tooth symmetry degree detecting device |
| CN105066856A (en) * | 2015-08-19 | 2015-11-18 | 重庆神箭汽车传动件有限责任公司 | Tool for testing degree of symmetry of gear key groove |
| JP2019015705A (en) * | 2017-07-11 | 2019-01-31 | 長野精工株式会社 | Key groove symmetry degree measurement device, tuning method of key groove symmetry degree measurement device, and measurement method of symmetry degree of key groove by key groove symmetry degree measurement device |
| CN209214480U (en) * | 2019-01-25 | 2019-08-06 | 常州市南方驱动技术有限公司 | Gear inner hole key slot symmetry detection is advised with function |
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