CN113624108B - Device for measuring symmetry degree of positioning key position of turbine rotor sleeve impeller and application method thereof - Google Patents
Device for measuring symmetry degree of positioning key position of turbine rotor sleeve impeller and application method thereof Download PDFInfo
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- CN113624108B CN113624108B CN202110908126.9A CN202110908126A CN113624108B CN 113624108 B CN113624108 B CN 113624108B CN 202110908126 A CN202110908126 A CN 202110908126A CN 113624108 B CN113624108 B CN 113624108B
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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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- Length Measuring Devices With Unspecified Measuring Means (AREA)
Abstract
A turbine rotor set impeller positioning key position symmetry measuring device and a using method thereof relate to a turbine rotor set impeller position symmetry measuring device and a using method thereof. The invention aims to solve the technical problem that the existing measuring tool cannot measure the position degree of the turbine rotor sleeved impeller positioning key relative to the inner hole cross center line after machining. The invention relates to a device for measuring the symmetry degree of the position of a positioning key of a turbine rotor sleeved impeller, 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 degree of the steam turbine rotor set impeller positioning key after processing, the accuracy is within 0.03mm, the processing requirement of the rotor set impeller positioning key is met, the processing accuracy of the rotor set impeller positioning key is improved, and the product processing quality is ensured; the measuring device designed by the invention has a simple structure, is convenient to operate, is an efficient and practical measuring device and method, and has been widely applied to production practice.
Description
Technical Field
The invention relates to a turbine rotor set impeller position symmetry measuring device and a using method thereof.
Background
The turbine rotor sleeve impeller positioning key is usually processed by a common boring machine, a cross center line of an inner hole is firstly drawn on the end face of the impeller, then the position and the size of the positioning key are drawn according to the position of the cross center line, and the symmetry degree of the positioning key relative to the cross center line of the inner hole of the impeller is ensured to be within 0.03. After the boring machine processes according to the marking position, the existing universal measuring tool cannot measure the position degree of the positioning key relative to the cross center line of the inner hole after processing because the center line of the inner hole is not used as a standard, the marking precision is within 0.1mm, the position precision requirement cannot be ensured, and the problem that the impeller cannot be normally assembled when the positioning key is processed due to overlarge deviation of the position is often caused.
Disclosure of Invention
The invention provides a device for measuring the symmetry of the position of a positioning key of a turbine rotor set impeller and a use method thereof, which aims to solve the technical problem that the prior measuring tool cannot measure the position of the positioning key of the turbine rotor set impeller relative to the cross center line of an inner hole after processing.
The invention relates to a measuring device for the symmetry degree of the positioning key position of a turbine rotor sleeve impeller, 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 formed in the central area of the measuring plate 1, and one central axis of the rectangular through hole 1-1 coincides 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 near 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 near the big 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 set screw hole 2-1 is arranged at the center of the side face of the big end of the positioning block 2, the set screw hole 2-1 is a through hole, and the axis of the set screw hole 2-1 is perpendicular to the axis of the set screw hole 2-2; the inner walls of the set screw hole 2-2 and the set screw hole 2-1 are provided with internal threads;
the two locating pins 5 are respectively arranged in the two locating 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 two fixing screws 3 are respectively fixed in two fixing screw holes 2-2 and two waist-shaped holes 1-7; the set screw 4 is fixed in the set screw hole 2-1 and the set screw 4 is disposed on the symmetry axis of the measuring plate 1.
The application method of the turbine rotor suit impeller positioning key position symmetry measuring device comprises the following steps:
1. firstly, placing an impeller 6 on a plane, wherein a positioning key 6-1 to be detected of the impeller 6 is upwards, placing a device for measuring the symmetry degree of the position of a turbine rotor sleeved with the positioning key on the end face of the impeller 6, positioning a block 2 below a measuring plate 1, and positioning a pin 5 against the inner wall of an inner hole 6-2 of the impeller;
2. rotating the turbine rotor sleeve impeller positioning key position symmetry measuring device along the impeller inner hole 6-2 to enable the positioning key 6-1 to be measured to be positioned between the first measuring surface 1-4 and the second measuring surface 1-3 of the measuring plate 1, ensuring that the symmetry axis of the measuring plate 1 coincides with the symmetry axis of the impeller 6, and screwing the positioning screw 4 to prop against the impeller outer circle 6-5 to enable the measuring device to be fixed on the end face of the impeller 6;
3. measuring a distance C between a first machining surface 6-7 and a second measuring surface 1-3 of a positioning key 6-1 to be measured by using a caliper, measuring a distance D between a second machining surface 6-6 and a first measuring surface 1-4 of the positioning key 6-1 to be measured by using the caliper, and calculating two end face deviation values H, H= (C-D) mm; and determining the eccentric condition according to the numerical value, if the absolute value of H is larger than 0.03mm, measuring after reprocessing until the eccentric value meets the drawing requirement.
Compared with the prior art, the invention has the following effects:
the method can accurately measure the position symmetry degree of the steam turbine rotor set impeller positioning key after processing, the accuracy is within 0.03mm, the processing requirement of the rotor set impeller positioning key is met, the processing accuracy of the rotor set impeller positioning key is improved, and the product processing quality is ensured; the measuring device designed by the invention has a simple structure, is convenient to operate, is an efficient and practical measuring device and method, and has been widely applied to production practice.
Drawings
Fig. 1 is a plan view of a measuring plate 1 according to a first embodiment;
FIG. 2 is a cross-sectional view B-B of FIG. 1;
FIG. 3 is a cross-sectional view of section 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 an overall plan view of a turbine rotor set impeller positioning key position symmetry measuring device according to an embodiment I;
FIG. 6 is a left side view of FIG. 5;
FIG. 7 is a cross-sectional view of FIG. 5C-C;
FIG. 8 is a top view of a turbine rotor package impeller positioning key position symmetry measuring device according to a fifth embodiment;
fig. 9 is a section A-A of fig. 8.
Detailed Description
The first embodiment is as follows: the embodiment is a measuring device for the symmetry degree of the positioning key position of the turbine rotor sleeved impeller, as 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 formed in the central area of the measuring plate 1, and one central axis of the rectangular through hole 1-1 coincides 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 near 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 near the big 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 set screw hole 2-1 is arranged at the center of the side face of the big end of the positioning block 2, the set screw hole 2-1 is a through hole, and the axis of the set screw hole 2-1 is perpendicular to the axis of the set screw hole 2-2; the inner walls of the set screw hole 2-2 and the set screw hole 2-1 are provided with internal threads;
the two locating pins 5 are respectively arranged in the two locating 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 two fixing screws 3 are respectively fixed in two fixing screw holes 2-2 and two waist-shaped holes 1-7; the set screw 4 is fixed in the set screw hole 2-1 and the set screw 4 is disposed on the symmetry axis of the measuring plate 1.
The second embodiment is as follows: the first difference between this embodiment and the specific embodiment is that: the 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 other is the same as in the first embodiment.
And a third specific embodiment: this embodiment differs from the first or second embodiment in that: the grooves 1-6 are rectangular structures. The other embodiments are the same as those of the first or second embodiment.
The specific embodiment IV is as follows: this embodiment differs from one of the first to third embodiments in that: the positioning pin holes 1-2 are round holes. The other is the same as in one of the first to third embodiments.
Fifth embodiment: the application method of the turbine rotor suit impeller positioning key position symmetry measuring device in the embodiment is as shown in fig. 8 and 9, and the specific process is as follows:
1. firstly, placing an impeller 6 on a plane, wherein a positioning key 6-1 to be detected of the impeller 6 is upwards, placing a device for measuring the symmetry degree of the position of a turbine rotor sleeved with the positioning key on the end face of the impeller 6, positioning a block 2 below a measuring plate 1, and positioning a pin 5 against the inner wall of an inner hole 6-2 of the impeller;
2. rotating the turbine rotor sleeve impeller positioning key position symmetry measuring device along the impeller inner hole 6-2 to enable the positioning key 6-1 to be measured to be positioned between the first measuring surface 1-4 and the second measuring surface 1-3 of the measuring plate 1, ensuring that the symmetry axis of the measuring plate 1 coincides with the symmetry axis of the impeller 6, and screwing the positioning screw 4 to prop against the impeller outer circle 6-5 to enable the measuring device to be fixed on the end face of the impeller 6;
3. measuring a distance C between a first machining surface 6-7 and a second measuring surface 1-3 of a positioning key 6-1 to be measured by using a caliper, measuring a distance D between a second machining surface 6-6 and a first measuring surface 1-4 of the positioning key 6-1 to be measured by using the caliper, and calculating two end face deviation values H, H= (C-D) mm; and determining the eccentric condition according to the numerical value, if the absolute value of H is larger than 0.03mm, measuring after reprocessing until the eccentric value meets the drawing requirement.
The invention was verified with the following test:
test one: the test is a measuring device for the symmetry degree of the positioning key position of the turbine rotor sleeved impeller, as 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 formed in the central area of the measuring plate 1, and one central axis of the rectangular through hole 1-1 coincides 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 near 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 near the big 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 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 of 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 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 set screw hole 2-1 is arranged at the center of the side face of the big end of the positioning block 2, the set screw hole 2-1 is a through hole, and the axis of the set screw hole 2-1 is perpendicular to the axis of the set screw hole 2-2; the inner walls of the set screw hole 2-2 and the set screw hole 2-1 are provided with internal threads;
the two locating pins 5 are respectively arranged in the two locating 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 two fixing screws 3 are respectively fixed in two fixing screw holes 2-2 and two waist-shaped holes 1-7; the set screw 4 is fixed in the set screw hole 2-1 and the set screw 4 is disposed on the symmetry axis of the measuring plate 1.
The using method of the turbine rotor sleeve impeller positioning key position symmetry measuring device comprises the following steps:
1. firstly, placing an impeller 6 on a plane, wherein a positioning key 6-1 to be detected of the impeller 6 is upwards, placing a device for measuring the symmetry degree of the position of a turbine rotor sleeved with the positioning key on the end face of the impeller 6, positioning a block 2 below a measuring plate 1, and positioning a pin 5 against the inner wall of an inner hole 6-2 of the impeller;
2. rotating the turbine rotor sleeve impeller positioning key position symmetry measuring device along the impeller inner hole 6-2 to enable the positioning key 6-1 to be measured to be positioned between the first measuring surface 1-4 and the second measuring surface 1-3 of the measuring plate 1, ensuring that the symmetry axis of the measuring plate 1 coincides with the symmetry axis of the impeller 6, and screwing the positioning screw 4 to prop against the impeller outer circle 6-5 to enable the measuring device to be fixed on the end face of the impeller 6;
3. measuring a distance C between a first machining surface 6-7 and a second measuring surface 1-3 of a positioning key 6-1 to be measured by using a caliper, measuring a distance D between a second machining surface 6-6 and a first measuring surface 1-4 of the positioning key 6-1 to be measured by using the caliper, and calculating two end face deviation values H, H= (C-D) mm; and determining the eccentric condition according to the numerical value, if the absolute value of H is larger than 0.03mm, measuring after reprocessing until the eccentric value meets the drawing requirement.
The method can accurately measure the position symmetry degree of the steam turbine rotor set impeller positioning key after processing, the accuracy is within 0.03mm, the processing requirement of the rotor set impeller positioning key is met, the processing accuracy of the rotor set impeller positioning key is improved, and the product processing quality is ensured; the measuring device of the test design has a simple structure, is convenient to operate, is a high-efficiency and practical measuring device and method, and is widely applied to production practice.
Claims (5)
1. The device for measuring the position symmetry of the positioning key of the turbine rotor sleeved impeller is characterized by comprising 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) coincides 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) near 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) near the big 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 set screw hole (2-1) is arranged at the center of the side face of the big end of the positioning block (2), the set screw hole (2-1) is a through hole, and the axis of the set screw hole (2-1) is perpendicular to the axis of the set screw hole (2-2); the inner walls of the set screw hole (2-2) and the set screw hole (2-1) are provided with internal threads;
the two locating pins (5) are respectively arranged in the two locating 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 two fixing screws (3) are respectively fixed in two fixing screw holes (2-2) and two waist-shaped holes (1-7); the set screw (4) is fixed in the set screw hole (2-1) and the set screw (4) is disposed on the symmetry axis of the measuring plate (1).
2. The measuring device for the symmetry degree of the positioning key position of the turbine rotor sleeve impeller according to claim 1, wherein the two opposite inner walls of the rectangular through hole (1-1) are 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 device for measuring the position symmetry degree of the positioning key of the turbine rotor set impeller according to claim 1, wherein the grooves (1-6) are rectangular structures.
4. The device for measuring the symmetry degree of the positioning key position of the turbine rotor suit impeller according to claim 1 is characterized in that the positioning pin holes (1-2) are round holes.
5. The method for using the device for measuring the position symmetry of the positioning key of the turbine rotor set impeller according to claim 1, wherein the method for using the device for measuring the position symmetry of the positioning key of the turbine rotor set impeller comprises the following specific steps:
1. firstly, placing an impeller (6) on a plane, wherein a positioning key (6-1) to be detected of the impeller (6) faces upwards, placing a turbine rotor sleeved with an impeller positioning key position symmetry measuring device on the end face of the impeller (6), positioning a block (2) below a measuring plate (1), and positioning a pin (5) against the inner wall of an inner hole (6-2) of the impeller;
2. rotating the turbine rotor along the inner hole (6-2) of the impeller to set the symmetry measuring device of the impeller positioning key position, 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 coincide with the symmetry axis of the impeller (6), and the positioning screw (4) is screwed to prop against the outer circle (6-5) of the impeller to fix the measuring device on the end face of the impeller (6);
3. measuring a distance C between a first machining surface (6-7) and a second measuring surface (1-3) of a positioning key (6-1) to be measured by using a caliper, measuring a distance D between the second machining 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 face deviation values H, H= (C-D) mm; and determining the eccentric condition according to the numerical value, if the absolute value of H is larger than 0.03mm, measuring after reprocessing until the eccentric value meets the drawing requirement.
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| 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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| 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 CN113624108A (en) | 2021-11-09 |
| CN113624108B true CN113624108B (en) | 2023-10-10 |
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2021
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| 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 |
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