CN111692946A - Device and method for measuring elongation of back wheel bolt of steam turbine rotor - Google Patents
Device and method for measuring elongation of back wheel bolt of steam turbine rotor Download PDFInfo
- Publication number
- CN111692946A CN111692946A CN202010595113.6A CN202010595113A CN111692946A CN 111692946 A CN111692946 A CN 111692946A CN 202010595113 A CN202010595113 A CN 202010595113A CN 111692946 A CN111692946 A CN 111692946A
- Authority
- CN
- China
- Prior art keywords
- measuring
- bolt
- screw
- fixing block
- adjusting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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
- G01B5/02—Measuring arrangements characterised by the use of mechanical techniques for measuring length, width or thickness
-
- 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
- G01B5/08—Measuring arrangements characterised by the use of mechanical techniques for measuring diameters
Abstract
The invention belongs to the measurement technology, in particular to a device and a method for measuring the bolt elongation of a back wheel of a steam turbine rotor, wherein the device comprises a measuring frame, a measuring end fixing block, an adjusting end fixing block, a dial indicator, a measuring screw and an adjusting screw; the flat end of the measuring screw presses a measuring head of the dial indicator, and the adjusting screw is tightly attached to the non-threaded end of the to-be-measured back rest wheel bolt; the measuring end of the measuring screw rod contacts the thread end of the back-wheel bolt to be measured, the adjusting screw rod is adjusted to a proper position according to the original length of the bolt, and the adjusting screw rod is locked by a locking nut; tightly attaching the end part of the adjusting screw rod to one end of the backrest bolt, rotating the measuring screw rod to enable the round head end to be pressed to be tightly attached to the other end of the backrest bolt, compressing a measuring head of the dial indicator by the flat head end, and recording the reading of the dial indicator; after the backrest wheel bolt extends, the measuring screw rod is adjusted, the reading of the dial indicator is read, and the difference of the two numbers is the extension amount of the bolt.
Description
Technical Field
The invention belongs to the measurement technology, and particularly relates to an elongation measurement device and a measurement method for a steam turbine rotor back wheel before and after bolt fastening.
Background
The back wheels of the rotors of the steam turbine of the power plant are connected by bolts, the elongation after the bolts are fastened has different requirements according to different specifications and models of the bolts, and whether the back wheels are fastened in place according to design requirements can be intuitively reflected through the elongation.
The elongation of the backrest wheel bolt is measured by using a standard outside micrometer generally, the original length is measured by using the outside micrometer before the bolt is installed, the length of the bolt stretched by fastening is measured by using the outside micrometer after the bolt is installed in place, and the difference is the elongation of the backrest wheel bolt. However, some backing wheels are complex in structure, and cannot be measured by using an outer diameter micrometer, such as a high-pressure rotor of a turbine of a VVER nuclear power unit, a gear wheel of a turning device is arranged on a rear back wheel of the high-pressure rotor, the diameter of the gear wheel of the turning device is larger than that of the backing wheel, the width of the gear wheel of the turning device also exceeds the thickness of the rear back wheel of the high-pressure rotor, and the gear wheel of the turning device is irregular.
Disclosure of Invention
The invention aims to provide a device and a method for measuring the elongation of a back wheel bolt of a steam turbine rotor, which can replace an outside micrometer to measure the elongation of the back wheel bolt, and have the advantages of more convenient measurement, better applicability and faster speed measurement.
The technical scheme of the invention is as follows:
a steam turbine rotor back rest wheel bolt elongation measuring device comprises a measuring frame, a measuring end fixing block and an adjusting end fixing block which are respectively arranged at a measuring end and an adjusting end of the measuring frame, a dial indicator and a measuring screw rod which are arranged through the measuring end fixing block, and an adjusting screw rod which is arranged through the adjusting end fixing block; the dial indicator, the measuring screw rod, the adjusting screw rod and the backrest wheel bolt are coaxial; the flat end of the measuring screw presses a measuring head of the dial indicator, and the adjusting screw is tightly attached to the non-threaded end of the to-be-measured back wheel bolt; and the measuring end of the measuring screw rod is contacted with the threaded end of the back wheel bolt to be measured.
The measuring frame is C-shaped, the lower ends of the two sides of the measuring frame are respectively a measuring end and an adjusting end, the measuring frame is installed on the outer side of the large gear of the barring gear, and the measuring end and the adjusting end are respectively located at the two ends of the back wheel bolt to be measured.
The measuring end is provided with a fixing bolt hole I, and the adjusting end is provided with a fixing bolt hole II; a fixed block bolt hole I is processed at the upper end of the measuring end fixing block, and a fixed block bolt hole II is processed at the upper end of the adjusting end fixing block; fixing bolt hole I align with fixing block bolt hole I, through the fixed end fixing block of measuring of fixing block fastener I, fixing bolt hole II align with fixing block bolt hole II, fix through fixing block fastener II and adjust the end fixing block.
The measuring end fixing block lower extreme processing mounting groove for the lower extreme of measuring end fixing block falls into two parts, the part processing plug screw thread hole in the outside, the partial processing measuring rod screw hole in the inboard, plug screw thread hole and measuring rod screw hole internal diameter size the same and coaxial.
The measuring end is provided with 4 fixing bolt holes I which are positioned at the same horizontal height and are uniformly spaced; fixed block bolt hole I be 4, the position corresponds with fixed bolt hole I.
The utility model discloses a dial indicator, including the dial indicator sleeve hole, the dial indicator is installed in the sleeve hole of dial indicator, the side processing has a set screw hole, the dial indicator install at the dial indicator sleeve hole through its outside sleeve, screw in the set screw hole through the set screw tightly with the dial indicator top.
And the lower end of the adjusting end fixing block is provided with an adjusting screw threaded hole which penetrates through the adjusting end fixing block along the axial direction.
The adjusting end is provided with 2 fixing bolt holes II which are positioned at the same horizontal height; and 2 fixing block bolt holes II are arranged, and the positions of the fixing block bolt holes II correspond to those of the fixing bolt holes II.
The measuring screw is installed in the measuring rod threaded hole in a threaded mode, the adjusting screw is installed in the adjusting screw threaded hole in a threaded mode in a screwed mode, and the adjusting screw is locked through the locking nut after being in contact with the backrest wheel bolt.
A method for measuring the elongation of a bolt of a back wheel of a steam turbine rotor by using a device for measuring the elongation of the bolt of the back wheel of the steam turbine rotor comprises the following steps:
1) the adjusting screw and the measuring screw are respectively arranged at the adjusting end and the measuring end of the measuring frame by utilizing the measuring device for the bolt elongation of the back wheel of the steam turbine rotor;
2) the backrest wheel bolt is placed according to the number after being cleaned, the center point of two end faces of the backrest wheel bolt is taken as a measuring point, identification is carried out, and the adjusting screw rod is positioned at the non-threaded end of the backrest wheel bolt.
3) Selecting a reference part with the length difference of the bolts of the backrest wheel within 1-2%, rotating the adjusting screw rod to enable the end part of the adjusting screw rod to be tightly attached to one end of the reference part, enabling the other end of the reference part to be tightly attached to the round head of the measuring screw rod, rotating the dial plate when the reading of the dial indicator is stable, setting the reading of the dial indicator to be 0, screwing the locking nut at the moment, fixing the adjusting screw rod and locking, and then, not loosening all the bolts before measurement is completed; taking down the reference piece after the measurement is finished;
4) measuring the original length of the back-wheel bolt, wherein an adjusting screw is tightly attached to the non-threaded end of the back-wheel bolt, the measuring screw is rotated to enable the round head of the measuring screw to be tightly attached to the threaded end of the back-wheel bolt, reading the reading of a dial indicator, recording the measured values of all back-wheel bolts to be installed according to the number, and at the moment, all the numerical values are the length of the back-wheel bolt relative to a reference piece;
5) after the back wheel bolt is installed in place, the fastening nut stretches the back wheel bolt;
6) measuring all the backrest wheel bolts which are already installed in place according to the method in the step 4), recording the readings of all the dial indicators according to the numbers, and if the end surfaces of the two ends of the backrest wheel bolts are irregular, the measuring points before and after stretching are located at the same position, and at the moment, all the recorded data are the lengths of the fastened and stretched backrest wheel bolts relative to the reference member;
7) if the back-wheel bolt elongation measuring tool cannot span the barring gearwheel, the measuring screw can be detached and assembled after spanning the barring gearwheel;
8) after all the to-be-measured back-to-back wheel bolts are measured, measuring the length of the reference piece again;
9) and calculating the elongation of the back wheel bolt after stretching, wherein the difference value of the reading of the dial indicator before and after stretching of each back wheel bolt is the elongation of the back wheel bolt.
The invention has the following remarkable effects: designing fixed blocks which are respectively fixed at two ends of the measuring frame; the fixed block is provided with a screw plug, a dial indicator, a measuring screw rod and an adjusting screw rod.
Adjusting the adjusting screw to a proper position according to the original length of the bolt, and locking the adjusting screw by using a locking nut; the end part of the adjusting screw is tightly attached to one end of the backrest wheel bolt, the measuring screw is rotated to enable the round head end to be pressed to be tightly attached to the other end of the backrest wheel bolt, the flat head end compresses a measuring head of the dial indicator, and the reading of the dial indicator is recorded; after the back wheel bolt is fastened and elongated through the nut, the measuring screw rod is adjusted in the same method, the reading of the dial indicator is read, and the difference of the two numbers is the elongation of the bolt.
Compared with an outside micrometer, the method has the advantages that the dial indicator is direct and simple in reading and high in measuring speed.
The conventional outside micrometer cannot measure the elongation of the bolt at a position with a complex structure due to the self structure, and can avoid an obstacle to measure by manufacturing a measuring frame in a targeted manner; and the device can be disassembled in the measuring process and assembled after crossing the device, so that the data measurement is not influenced. The problem of complicated position measurement not good in the outside micrometer measuring process is solved.
The method uses the reference piece to carry out positioning calibration, and because the length of the reference piece is fixed, when the measurement tool possibly generates deviation in the process of measuring the back wheel bolt if the percentage table is mistakenly touched and the like, the reference piece can be measured again to carry out calibration, and the adjusting screw rod is adjusted; and returning the reading of the dial indicator to the original position, and then continuing to measure the back wheel bolt.
Along with the increase of unit capacity, turbo generator set rotor backrest wheel bolt also is longer and longer, and the external micrometer that the range is super big is expensive and frequency of utilization low, has not had the external micrometer of corresponding measuring range even to measure, processes a measuring rack according to the length of bolt, and the course of working is simple, and the expense is few, is far less than purchasing the external micrometer expense that the range is super big.
The measuring method can be applied to the measurement of the relative elongation of bolt fasteners in other structural forms or the measurement of the relative change of the length or the diameter of the same object (not only a bolt) before and after the temperature change.
Drawings
FIG. 1 is a schematic view of a steam turbine rotor back-wheel bolt elongation measuring device;
FIG. 2 is a schematic view of a measuring stand;
FIG. 3a is a schematic view of a measuring end fixing block;
FIG. 3b is a side view of a measuring end fixing block;
FIG. 4a is a schematic view of an adjusting end fixing block;
FIG. 4b is a side view of the adjustment end fixing block;
FIG. 5a is a schematic view of a screw plug;
FIG. 5b is a side view of the plug;
in the figure: 1. a high pressure rotor; 2. a dial indicator; 3. a set screw; 4. a plug screw; 5. a measuring end fixing block; 6. measuring a screw rod; 7. a fixed block fastener I; 8. a nut; 9. a high pressure rotor back wheel; 10. a measuring frame; 11. turning a bull gear; 12. a low pressure rotor back wheel; 13. a back wheel bolt; 14. a fixed block fastener II; 15. adjusting the end fixing block; 16. locking the nut; 17. adjusting the screw rod; 18. a low-pressure rotor; 19. a fixing bolt hole I; 20. a fixing bolt hole II; 21. a screw plug internal threaded hole; 22. a fixed block bolt hole I; 23. a measuring rod threaded hole; 24. a fixed block bolt hole II; 25. adjusting a threaded hole of the screw; 26. sleeve holes of dial indicators; 27. a set screw hole.
Detailed Description
The invention is further illustrated by the accompanying drawings and the detailed description.
The measuring device as shown in fig. 1 comprises a measuring frame 10, a measuring end fixing block 5 and an adjusting end fixing block 15 respectively installed at a measuring end and an adjusting end of the measuring frame 10, a dial indicator 2 and a measuring screw 6 installed through the measuring end fixing block 5, and an adjusting screw 17 installed through the adjusting end fixing block 15.
The measuring object of the device is a back wheel bolt 13 for connecting a high-pressure rotor back wheel 9 and a low-pressure rotor back wheel 12, the back wheel bolt is fastened through a nut 8, the high-pressure rotor back wheel 9 and the low-pressure rotor back wheel 12 are respectively connected with a high-pressure rotor 1 and a low-pressure rotor 18, and a turning gear 11 is installed on the outer side of the high-pressure rotor back wheel 9.
The above-mentioned measuring device must satisfy the condition that the dial indicator 2, the measuring screw 6, the adjusting screw 17 and the back wheel bolt 13 are coaxial. The elongation of the backrest wheel bolt 13 is obtained by measuring with the dial indicator 2.
As shown in fig. 2, the measuring rack 10 is C-shaped, the lower ends of the two sides are respectively a measuring end and an adjusting end, and the measuring rack 10 is installed outside the large barring gear 11. The measuring end is processed with fixing bolt hole I19, and the regulation end is processed with fixing bolt hole II 20.
As shown in fig. 3a and 3b, the upper end of the measuring end fixing block 5 is provided with a fixing block bolt hole i 22, and the lower end of the measuring end fixing block is provided with a mounting groove, so that the lower end of the measuring end fixing block 5 is divided into two parts, the outer part of the measuring end fixing block is provided with a plug screw thread hole 21, the inner part of the measuring end fixing block is provided with a measuring rod thread hole 23, and the plug screw thread hole 21 and the measuring rod thread hole 23 have the same and. The upper end of the measuring end fixing block 5 is clamped at the front side and the rear side of the measuring end of the measuring frame 10, the fixing bolt holes I19 are aligned with the fixing block bolt holes I22, and the measuring end fixing block 5 is fixed through fixing block fasteners I7.
As shown in fig. 4a and 4b, the adjusting end fixing block 15 has a fixing block bolt hole ii 24 formed at an upper end thereof, and an adjusting screw threaded hole 25 axially penetrating the adjusting end fixing block 15 formed at a lower end thereof. The upper end of the adjusting end fixing block 15 is clamped on the front side and the rear side of the adjusting end of the measuring frame 10, the fixing bolt holes II 20 are aligned with the fixing block bolt holes II 24, and the adjusting end fixing block 15 is fixed through a fixing block fastening piece II 14.
The measuring screw 6 is installed in the measuring rod threaded hole 23 in a threaded mode, the adjusting screw 17 is installed in the adjusting screw threaded hole 25 in a threaded mode in a screwing mode, the adjusting screw 17 is locked through the locking nut 16 after being in contact with the backrest wheel bolt 13, and the measuring screw 6 is prevented from loosening.
The screw plug 4 is installed in the screw plug internal thread hole 21 in a screwed mode, a common gasket is additionally installed between the screw plug 4 and the measuring end fixing block 5, the screwing depth of the screw plug 4 is adjusted, and therefore the installation position of the dial indicator is guaranteed.
As shown in fig. 5a and 5b, the screw plug 4 is provided with a dial indicator sleeve hole 26 along the axial direction at the center and a stop screw hole 27 at the side. The dial indicator 2 is arranged in a sleeve hole 26 of the dial indicator through a sleeve outside the dial indicator, and the dial indicator 2 is tightly pressed by screwing the stop screw 3 into the stop screw hole 27.
The adjusting end fixing block 15 and the measuring end fixing block 5 are respectively fixed at two ends of the measuring frame 10 through fixing block fasteners 14 and 7; the screw plug 4 is screwed into an internal thread hole of the measuring end fixing block 5, and the dial indicator sleeve 2 is fixed in the internal thread hole of the screw plug 4 through the stop screw 3; assembling a measuring screw 6 on a measuring end fixing block 5, and pressing a measuring head of the dial indicator 2 by a butt end; the adjusting screw 17 is screwed into the adjusting end fixing block 15 and is locked and positioned by the locking nut 16.
When in installation, the method comprises the following steps:
the method comprises the following steps: and mounting the measuring end fixing block 5, aligning the fixing bolt hole I19 with the fixing bolt hole I22, and fastening the measuring end fixing block 5 to the left end of the measuring frame 10 through a fixing block fastener I7.
Step two: and installing and adjusting the end fixing block 15, aligning the fixing bolt hole II 20 with the fixing block bolt hole II 24, and fastening the adjusting end fixing block 15 to the right end of the measuring frame 10 through a fixing block fastening piece II 14.
Step three: the measuring screw 6 is assembled on the measuring end fixing block 5 through the measuring rod threaded hole 23.
Step four: screwing the adjusting screw 17 into the adjusting end fixing block 15 through the adjusting screw threaded hole 25, and rotating the adjusting screw 17 to the position according to the position of the backrest wheel bolt 13; the lock nut 16 is used for locking and loosening prevention after the adjusting screw 17 is rotated into position.
Step five: and checking the measuring screw 6 and the adjusting screw 17 which are installed in place by using a ruler, wherein the central lines of the two screws are on the same straight line, if the deviation is large, the fixing block fastening piece I7 and the fixing block fastening piece II 14 are loosened to adjust until the measuring screw 6 and the adjusting screw 17 are on the same straight line, and formally screwing the fixing block fastening piece I7 and the fixing block fastening piece II 14 after the correction is finished.
Step six: the screw plug 4 is screwed into the measuring end fixing block 5, and a common gasket is additionally arranged between the screw plug 4 and the measuring end fixing block 5 as required to adjust the screwing depth of the screw plug 4 so as to ensure the installation position of the dial indicator.
Step seven: the sleeve of the dial indicator 2 extends into the sleeve hole 26 of the dial indicator plug 4 and is screwed into the stop screw hole 27 through the stop screw 3 to be tightly pressed.
Step eight: and rotating the measuring screw 6, wherein the central position of the end part of the measuring screw 6 tightly presses the measuring head of the dial indicator 2, so that the revolution indicator of the dial indicator is positioned at a half position of the measuring range, and the measuring tool is preliminarily assembled.
After the device is installed, carrying out measurement operation according to the following steps;
the method comprises the following steps: according to the structure of the backrest wheel, the positions of the adjusting screw 17 and the measuring screw 6 are adjusted, and the backrest wheel bolt 13 can be stridden across the backrest wheel to measure after being confirmed to be installed in place.
Step two: cleaning all the back-wheel bolts 13, placing the back-wheel bolts according to the numbers, marking the measuring point positions at two ends of the back-wheel bolts 13 so as to be convenient for installing the back-wheel bolts at the same position and measuring the same position; the adjusting screw 17 is at the non-threaded end of the back wheel bolt 13 during measurement.
Step three: before the wheel-leaning bolt is measured, the reference part is measured, the purpose of the measurement reference part is to fix the adjusting screw 17, and the purpose of the measurement reference part is to measure the reference part again when deviation possibly occurs in the measuring process, and the dial indicator is adjusted to return to the original value. Selecting a reference part with the length approximately same as that of the backrest wheel bolt 13, rotating the adjusting screw 17 to enable the end part of the adjusting screw 17 to be tightly attached to one end of the reference part, enabling the other end of the reference part to be tightly attached to the round head of the measuring screw 6, rotating the dial plate when the reading of the dial indicator 2 is stable, setting the reading of the dial indicator 2 to be 0, screwing the locking nut 16 at the moment, and fixing the adjusting screw 17 to be locked, wherein the bolts cannot be loosened before all the bolts are measured. And taking down the reference piece after the measurement is finished.
Step four: measuring the original length of the backrest wheel bolt 13, tightly attaching the adjusting screw 17 to the non-threaded end of the backrest wheel bolt 13, rotating the measuring screw 6 (the adjusting screw 17 cannot be rotated) to tightly attach the round head of the measuring screw 6 to the threaded end of the backrest wheel bolt 13, reading the reading of the dial indicator 2, and recording the measured values of all the backrest wheel bolts to be installed according to the number, wherein all the numerical values are the lengths of the backrest wheel bolts relative to a reference part.
Step five: after the backrest wheel bolt 13 is installed in place, the nut 8 is fastened, and the backrest wheel bolt 13 is stretched.
Step six: and measuring all the backrest wheel bolts 13 which are already installed in place according to the method of the fourth step, recording the readings of all the dial indicators 2 according to the numbers, and if the end surfaces of the two ends of the backrest wheel bolts 13 are irregular, the measuring points before and after stretching are in the same position, wherein all the recorded data is the length of the fastened and stretched backrest wheel bolts 13 relative to the reference member.
Step seven: if the back-wheel bolt elongation measuring tool cannot span the jigger big gear, the measuring screw 6 can be detached and assembled after spanning the jigger big gear 11, and data measurement is not influenced.
Step eight: after all the bolts are measured, the length of the reference member is measured again by the backrest wheel bolt elongation measuring tool, and the reading of the dial indicator 2 is checked to return to the initial 0 position.
Step nine: the elongation of the backrest wheel bolt 13 after stretching is calculated as follows: and the difference value of the reading of the dial indicator before and after the stretching of each bolt is the elongation of the backrest wheel bolt.
It should be noted that before all the bolts are measured, the tightening of the locknut 16 and the dial indicator 2 cannot loosen, and if the tightening is loose, the reference member must be used again for verification, and the reading of the dial indicator 2 is adjusted to the original value, otherwise the measurement result is affected.
The method adjusts the adjusting screw to a proper position according to the original length of the bolt, and locks the adjusting screw by a locking nut; tightly attaching the end part of the adjusting screw rod to one end of the backrest bolt, rotating the measuring screw rod to enable the round head end to be pressed to be tightly attached to the other end of the backrest bolt, compressing a measuring head of the dial indicator by the flat head end, and recording the reading of the dial indicator; after the back wheel bolt is fastened and elongated through the nut, the measuring screw rod is adjusted in the same method, the reading of the dial indicator is read, and the difference of the two numbers is the elongation of the bolt.
Claims (10)
1. The utility model provides a steam turbine rotor backrest wheel bolt elongation measuring device which characterized in that: the device comprises a measuring frame (10), a measuring end fixing block (5) and an adjusting end fixing block (15) which are respectively arranged at a measuring end and an adjusting end of the measuring frame (10), a dial indicator (2) and a measuring screw rod (6) which are arranged through the measuring end fixing block (5), and an adjusting screw rod (17) which is arranged through the adjusting end fixing block (15); the dial indicator (2), the measuring screw (6), the adjusting screw (17) and the backrest wheel bolt (13) are coaxial; the butt end of the measuring screw (6) compresses a measuring head of the dial indicator (2), and the adjusting screw (17) is tightly attached to the non-threaded end of the back rest wheel bolt (13) to be measured; and the measuring end of the measuring screw (6) is contacted with the threaded end of the back wheel bolt (13) to be measured.
2. The steam turbine rotor back-wheel bolt elongation measuring device according to claim 1, wherein: the measuring frame (10) is C-shaped, the lower ends of the two sides are respectively a measuring end and an adjusting end, the measuring frame (10) is installed on the outer side of the large turning gear (11), and the measuring end and the adjusting end are respectively located at the two ends of a to-be-measured back wheel bolt (13).
3. The steam turbine rotor back-up pulley bolt elongation measuring apparatus of claim 2, wherein: the measuring end is provided with a fixing bolt hole I (19), and the adjusting end is provided with a fixing bolt hole II (20); a fixed block bolt hole I (22) is processed at the upper end of the measuring end fixed block (5), and a fixed block bolt hole II (24) is processed at the upper end of the adjusting end fixed block (15); fixing bolt hole I (19) align with fixing block bolt hole I (22), through I (7) fixed measurement end fixing block (5) of fixing block fastener, fixing bolt hole II (20) align with fixing block bolt hole II (24), through II (14) fixed regulation end fixing block (15) of fixing block fastener.
4. The steam turbine rotor back-wheel bolt elongation measuring device according to claim 3, wherein: the lower end of the measuring end fixing block (5) is provided with a mounting groove, so that the lower end of the measuring end fixing block (5) is divided into two parts, the outer part is provided with a screw plug internal thread hole (21), the inner part is provided with a measuring rod thread hole (23), and the internal diameters of the screw plug internal thread hole (21) and the measuring rod thread hole (23) are the same and coaxial.
5. The steam turbine rotor back-wheel bolt elongation measuring device according to claim 4, wherein: the measuring end is provided with 4 fixing bolt holes I (19) which are positioned at the same horizontal height and are uniformly spaced; the number of the fixing block bolt holes I (22) is 4, and the positions of the fixing block bolt holes I (22) correspond to those of the fixing bolt holes I (19).
6. The steam turbine rotor back-wheel bolt elongation measuring device according to claim 5, wherein: the utility model discloses a dial indicator, including screw plug internal thread hole (21), be equipped with screw plug (4) in screw plug internal thread hole (21), screw plug (4) center has percentage table cover barrel hole (26) along axial processing, side processing has stop screw hole (27), percentage table (2) install in percentage table cover barrel hole (26) through its outside sleeve, screw in stop screw hole (27) through stop screw (3) and push up percentage table (2).
7. The steam turbine rotor back-wheel bolt elongation measuring device according to claim 3, wherein: and the lower end of the adjusting end fixing block (15) is provided with an adjusting screw threaded hole (25) which penetrates through the adjusting end fixing block (15) along the axial direction.
8. The steam turbine rotor back-up pulley bolt elongation measuring apparatus of claim 7, wherein: the adjusting end is provided with 2 fixing bolt holes II (20) which are positioned at the same horizontal height; and 2 fixing block bolt holes II (24) are arranged, and the positions of the fixing block bolt holes II (24) correspond to those of the fixing bolt holes II (20).
9. The steam turbine rotor back-up pulley bolt elongation measuring apparatus of claim 8, wherein: the measuring screw (6) is installed in the measuring rod threaded hole (23) in a threaded mode, the adjusting screw (17) is installed in the adjusting screw threaded hole (25) in a threaded mode, and the adjusting screw (17) is locked through the locking nut (16) after being in contact with the backrest wheel bolt (13).
10. The method for measuring the elongation of the back-rest wheel bolt of the steam turbine rotor is characterized by comprising the following steps of:
1) an adjusting screw (17) and a measuring screw (6) are respectively arranged at an adjusting end and a measuring end of a measuring frame (10) by utilizing the measuring device for the bolt elongation of the back wheel of the steam turbine rotor;
2) the backrest wheel bolts (13) are placed according to numbers after being cleaned, the central points of two end faces of the backrest wheel bolts (13) are taken as measuring points, identification is carried out, and the adjusting screw rods (17) are positioned at the non-threaded ends of the backrest wheel bolts (13).
3) Selecting a reference part with the length difference of 1-2% with a backrest wheel bolt (13), rotating an adjusting screw rod (17) to enable the end part of the adjusting screw rod (17) to be tightly attached to one end of the reference part, enabling the other end of the reference part to be tightly attached to the round head of a measuring screw rod (6), rotating a dial plate when the reading of the dial indicator (2) is stable, setting the dial plate reading of the dial indicator (2) to be 0, screwing a locking nut (16) at the moment, and fixing and locking the adjusting screw rod (17) to ensure that the dial plate cannot be loosened before all bolts are measured; taking down the reference piece after the measurement is finished;
4) measuring the original length of a backrest wheel bolt (13), tightly attaching an adjusting screw rod (17) to the non-threaded end of the backrest wheel bolt (13), rotating a measuring screw rod (6) to enable the round head of the measuring screw rod (6) to be tightly attached to the threaded end of the backrest wheel bolt (13), reading the reading of a dial indicator (2), recording the measured values of all the backrest wheel bolts to be installed according to the number, wherein all the numerical values are the lengths of the backrest wheel bolts relative to a reference part;
5) after the backrest wheel bolt (13) is installed in place, the nut (8) is fastened, and the backrest wheel bolt (13) is stretched;
6) measuring all the backrest wheel bolts (13) which are already installed in place according to the method in the step 4), recording the readings of all the dial indicators (2) according to numbers, if the end surfaces of the two ends of the backrest wheel bolts (13) are irregular, the measuring points before and after stretching are located at the same position, and at the moment, all the recorded data are the lengths of the fastened and stretched backrest wheel bolts (13) relative to the reference member;
7) if the elongation measuring tool of the backrest wheel bolt (13) cannot cross the barring gearwheel (11), the measuring screw (6) can be detached and assembled after crossing the barring gearwheel (11);
8) after all the to-be-measured back-to-back wheel bolts (13) are measured, measuring the length of the reference piece again;
9) and calculating the elongation of the back wheel bolts (13) after stretching, wherein the difference value of the reading of the dial indicator before and after stretching of each back wheel bolt (13) is the elongation of the back wheel bolt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010595113.6A CN111692946A (en) | 2020-06-28 | 2020-06-28 | Device and method for measuring elongation of back wheel bolt of steam turbine rotor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010595113.6A CN111692946A (en) | 2020-06-28 | 2020-06-28 | Device and method for measuring elongation of back wheel bolt of steam turbine rotor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111692946A true CN111692946A (en) | 2020-09-22 |
Family
ID=72484111
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010595113.6A Pending CN111692946A (en) | 2020-06-28 | 2020-06-28 | Device and method for measuring elongation of back wheel bolt of steam turbine rotor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111692946A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113188707A (en) * | 2021-04-02 | 2021-07-30 | 太原理工大学 | Device for rapidly detecting looseness of flange bolt |
-
2020
- 2020-06-28 CN CN202010595113.6A patent/CN111692946A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113188707A (en) * | 2021-04-02 | 2021-07-30 | 太原理工大学 | Device for rapidly detecting looseness of flange bolt |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110614504A (en) | Centering tool and method for steam turbine and generator rotor coupling | |
| CN110315359B (en) | Low-pressure turbine guide blade tool structure and adjusting method | |
| CN105928446B (en) | The parallelism detection equipment and parallelism detection method of connecting rod | |
| CN111692946A (en) | Device and method for measuring elongation of back wheel bolt of steam turbine rotor | |
| CN212512812U (en) | Steam turbine rotor back wheel bolt elongation measuring device | |
| CN203100657U (en) | Detection device for depth dimensions of nut closing-up grooves | |
| CN212512868U (en) | Wedge-shaped anti-loosening threaded fastener measuring gauge | |
| CN211783257U (en) | Eccentric detection device of many sizes glass type spare | |
| CN109352328B (en) | Digital tracked vehicle transmission device center line correction instrument and correction method | |
| CN215726726U (en) | Spring support capable of monitoring load and displacement in real time | |
| CN110333025B (en) | Design method of tool for detecting effectiveness of locking torque of self-locking nut and thread plug gauge | |
| CN114505673A (en) | Air compressor main engine exhaust end screw rod gap adjusting process | |
| CN204831134U (en) | Diesel engine meshed gear tooth clearance measuring device | |
| CN111811364B (en) | Tool and method for measuring bolt elongation of high-pressure cylinder of steam turbine | |
| CN211305463U (en) | Centering tool for steam turbine and generator rotor coupling | |
| CN219726142U (en) | Angular contact bearing clearance correction device | |
| CN218781716U (en) | Device for measuring concentricity of charging pump rotor on nuclear power station | |
| CN201772853U (en) | Special-purpose testing tool for measuring vertical degree of connecting rod bolt pressure bearing surface corresponding to center of thread hole | |
| CN210180323U (en) | Centering device of gas turbine generator set coupling | |
| CN214702023U (en) | Centering tool for low-pressure inner cylinder and rotor of steam turbine | |
| CN115876141B (en) | Asymmetric hub spigot measuring tool and measuring method | |
| CN212963105U (en) | Instrument for measuring bolt elongation of high-pressure cylinder of steam turbine | |
| CN219433947U (en) | Measuring tool for detecting radiation holes of blade shroud of turbine blade | |
| CN220853550U (en) | Online detection device for center distance and symmetry degree of engine connecting rod | |
| CN113385553B (en) | Part deformation correction device and use method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |