CN114074271A - Method for grinding gas turbine blade and correcting and adjusting tool - Google Patents
Method for grinding gas turbine blade and correcting and adjusting tool Download PDFInfo
- Publication number
- CN114074271A CN114074271A CN202010762634.6A CN202010762634A CN114074271A CN 114074271 A CN114074271 A CN 114074271A CN 202010762634 A CN202010762634 A CN 202010762634A CN 114074271 A CN114074271 A CN 114074271A
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- grinding
- gas turbine
- data value
- air inlet
- inlet side
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- 238000000034 method Methods 0.000 title claims abstract description 41
- 230000008569 process Effects 0.000 claims abstract description 24
- 238000003754 machining Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B19/00—Single-purpose machines or devices for particular grinding operations not covered by any other main group
- B24B19/14—Single-purpose machines or devices for particular grinding operations not covered by any other main group for grinding turbine blades, propeller blades or the like
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B49/00—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
- Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
Abstract
The invention provides a method for grinding a gas turbine blade and a calibration tool, comprising the following steps: 1) the positioning grinding equipment comprises the following positioning processes: prefabricating a correcting and adjusting tool, wherein the correcting and adjusting tool comprises a dial indicator and a measuring head connected with the dial indicator, the correcting and adjusting tool is installed on grinding equipment, a measuring rod of the dial indicator is perpendicular to the axis of the grinding wheel, the grinding equipment is moved in the correcting and adjusting process, the measuring head is in contact with the air inlet side and the air outlet side of the blade 1 in sequence, the data value of the air inlet side corresponding to the air inlet side and the data value of the air outlet side corresponding to the air inlet side are read, the position of the grinding equipment is adjusted according to the data value of the air outlet side and the data value of the air inlet side until the difference value of the data value of the air outlet side and the data value of the air inlet side is within a certain range, and fine positioning is completed; 2) and starting the grinding equipment to grind the blade. The invention is used for solving the problem that the prior grinding equipment in the prior art can not directly grind the blades of the gas turbine.
Description
Technical Field
The invention relates to the field of machining, in particular to the field of machining of a gas turbine blade.
Background
At present, the working rotor blades of the gas turbine need to be replaced during repair, the most important is to grind the replaced rotor blades in a power plant, and the grinded blades meet the design requirements of through-flow gaps. Because every blade on the gas turbine all installs on the rotor alone, and not be connected between the monolithic blade, every blade all has certain angle, and the angle of all blades is the same, and current grinding equipment can't be directly to these some blades grinding.
Therefore, a method for machining all the blades on the rotor after the individual blades are precisely adjusted is needed.
The correcting and adjusting tool provided by the invention is used for fundamentally breaking the reality that the original blade repairing grinding in a gas turbine cannot realize field grinding in a power plant through field grinding equipment, and a rotor needs to be pulled back to a factory for grinding processing in special equipment. The invention realizes the on-site grinding processing of the turbine blade of the gas turbine rotor power plant and obtains good economic and social values.
Disclosure of Invention
In view of the above-mentioned shortcomings of the prior art, the present invention provides a method and an adjustment tool for grinding a gas turbine blade, which are used for solving the problem that the prior grinding device in the prior art cannot directly grind the gas turbine blade.
To achieve the above and other related objects, the present invention provides a method of grinding a blade on a gas turbine, comprising: 1) the positioning grinding equipment comprises the following positioning processes: prefabricating a correcting and adjusting tool, wherein the correcting and adjusting tool comprises a dial indicator and a measuring head connected with the dial indicator, the correcting and adjusting tool is installed on grinding equipment, a measuring rod of the dial indicator is perpendicular to the axis of the grinding wheel, the grinding equipment is moved in the correcting and adjusting process, the measuring head is in contact with the air inlet side and the air outlet side of the blade in sequence, the data value of the air inlet side corresponding to the air inlet side and the data value of the air outlet side corresponding to the air inlet side are read, the position of the grinding equipment is adjusted according to the data value of the air outlet side and the data value of the air inlet side until the difference value of the data value of the air outlet side and the data value of the air inlet side is within a certain range, and fine positioning is completed; 2) and starting the grinding equipment to grind the blade.
Preferably, in the step 1), in the calibration process, the measuring head is in contact with the air inlet side of the blade, the rotor of the gas turbine is rotated, and the maximum reading of the dial indicator in the rotation process is taken as the data value of the air inlet side.
Preferably, in the step 1), in the calibration process, the measuring head is in contact with the air outlet side of the blade, the rotor of the gas turbine is rotated, and the maximum reading of the dial indicator in the rotation process is taken as the data value of the air outlet side.
Preferably, in step 1), the difference between the data value at the air outlet side and the data value at the air inlet side is within 0.02 mm.
Preferably, in the step 2), during the grinding process, the rotation direction of the rotor of the gas turbine and the rotation direction of the grinding wheel are opposite.
Preferably, after the current blade is ground, the grinding device is moved to grind all the blades to be ground one by one.
The invention also provides a correcting and adjusting tool for grinding the gas turbine blade, which comprises a measuring head and a dial indicator, wherein the measuring head is fixedly connected with the measuring rod of the dial indicator, and the measuring end of the measuring head is arc-shaped.
Preferably, the measuring rod is a threaded rod, the measuring head is provided with threads matched with the threaded rod, and the threaded rod is in threaded connection with the measuring head.
Preferably, the measuring surface of the measuring head is hardened.
As described above, the method for grinding a gas turbine blade and the calibration tool of the present invention have the following advantages:
according to the invention, the gas outlet side data value and the gas inlet side data are obtained by measuring the gas inlet side and the gas outlet side of the blade by using the adjusting tool, and the grinding equipment is adjusted according to the difference value of the gas outlet side data value and the gas inlet side data until the angle of a grinding wheel on the grinding equipment is consistent with the angle of the blade.
Drawings
FIG. 1 is a front view of a calibrating tool for grinding a blade of a gas turbine according to an embodiment of the present invention.
FIG. 2 is a schematic side view of a calibration tool for grinding a blade of a gas turbine according to an embodiment of the present invention.
Description of the element reference numerals
1 blade
101 air inlet side
102 air outlet side
2 measuring head
3 threaded rod
4 percent meter
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.
The invention provides a method for grinding a blade on a gas turbine and a calibration tool, comprising the following steps: 1) the positioning grinding equipment comprises the following positioning processes: prefabricating a correcting and adjusting tool, wherein the correcting and adjusting tool comprises a dial indicator 4 and a measuring head 2 connected with the dial indicator 4, the correcting and adjusting tool is installed on grinding equipment, a measuring rod of the dial indicator 4 is perpendicular to the axis of the grinding wheel, the grinding equipment is moved in the correcting and adjusting process, the measuring head 2 is sequentially contacted with an air inlet side 101 and an air outlet side 102 of the blade 1, a data value of the air inlet side 101 corresponding to the air inlet side 101 and a data value of the air outlet side 102 are read, the position of the grinding equipment is adjusted according to the data value of the air outlet side 102 and the data value of the air inlet side 101 until the difference value of the data value of the air outlet side 102 and the data value of the air inlet side 101 is within a certain range, and fine positioning is completed; 2) and starting a grinding device to grind the blade 1.
According to the invention, the gas inlet side 101 and the gas outlet side 102 of the blade 1 are measured by using the correcting and adjusting tool to obtain the data value of the gas outlet side 102 and the data of the gas inlet side 101, and the grinding equipment is adjusted according to the difference value of the data value of the gas outlet side 102 and the data of the gas inlet side 101 until the angle of a grinding wheel on the grinding equipment is consistent with the angle of the blade 1.
In the process of positioning the grinding equipment, as shown in fig. 2, the measuring head 2 is in contact with the air inlet side 101/air outlet side 102 of the blade 1, the rotor of the gas turbine is rotated, the maximum reading of the dial indicator 4 in the rotating process is taken as the data value of the air inlet side 101/air outlet side 102, and the difference value between the data value of the air outlet side 102 and the data value of the air inlet side 101 is within 0.02mm, so that the positioning is completed.
In the present embodiment, as shown in fig. 1, an alignment tool for grinding a gas turbine blade includes: measuring head 2 and percentage table 4, measuring head 2 passes through threaded rod 3 fixed connection with percentage table 4, and the measuring end of measuring head 2 is arc, and the measuring surface of measuring head 2 need do the hardening process, increases measuring result's accuracy nature.
The method for calibrating and adjusting the angle of the grinding wheel on the grinding equipment by using the calibrating and adjusting tool in the embodiment comprises the following specific steps:
1) pre-positioning a grinding device, mounting the grinding device at a cylinder middle facet of a gas turbine, observing the angle of a grinding wheel on the grinding device by naked eyes, and adjusting the angle of the grinding wheel to be basically consistent with the angle of a blade 1 on the gas turbine;
2) the method comprises the following steps of (1) fine positioning grinding equipment, mounting a correcting and adjusting tool on the grinding equipment, ensuring that a threaded rod 3 is perpendicular to the axis of a grinding wheel, moving the grinding equipment to enable a measuring head 2 to be in contact with an air inlet side 101 of a blade 1, rotating a rotor of a gas turbine, taking the maximum reading of a dial indicator 4 in the rotating process as the data value of the air inlet side 101, moving the grinding equipment again to enable the measuring head 2 to be in contact with an air outlet side 102 of the blade 1, rotating the rotor of the gas turbine, taking the maximum reading of the dial indicator 4 in the rotating process as the data value of the air outlet side 102, comparing the data value of the air inlet side 101 with the data value of the air outlet side 102, adjusting the grinding equipment according to the difference of the two data values until the difference between the data value of the air outlet side 102 and the data value of the air inlet side 101 is within 0.02mm, and finishing fine positioning;
3) starting grinding equipment to grind the blade 1, wherein in the grinding process, the rotating direction of a grinding wheel is opposite to that of a rotor on the gas turbine, and the rotor of the gas turbine rotates at a low speed of 6-8 r/min;
4) and moving the grinding equipment to grind all the blades 1 to be ground.
In summary, according to the method and the calibration tool for grinding the blades on the gas turbine, the calibration tool is used for measuring the air inlet side 101 and the air outlet side 102 of the blade 1 to obtain the data value of the air outlet side 102 and the data of the air inlet side 101, and the grinding equipment is adjusted according to the difference value between the data value of the air outlet side 102 and the data of the air inlet side 101 until the angle of the grinding wheel on the grinding equipment is consistent with the angle of the blade 1.
Therefore, the invention effectively overcomes various defects in the prior art and has high industrial utilization value.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (9)
1. A method of grinding a gas turbine blade, comprising:
1) the positioning grinding equipment comprises the following positioning processes: prefabricating a calibration tool, wherein the calibration tool comprises a dial indicator (4) and a measuring head (2) connected with the dial indicator (4), the calibration tool is installed on grinding equipment, a measuring rod of the dial indicator (4) is perpendicular to the axis of the grinding wheel, the grinding equipment is moved in the calibration process, the measuring head (2) is sequentially contacted with an air inlet side (101) and an air outlet side (102) of a blade (1), a data value of the air inlet side (101) corresponding to the air inlet side (101) and a data value of the air outlet side (102) corresponding to the air outlet side (102) are read, the position of the grinding equipment is adjusted according to the data value of the air outlet side (102) and the data value of the air inlet side (101), and the fine positioning is completed until the difference value of the data value of the air outlet side (102) and the data value of the air inlet side (101) is within a certain range;
2) and starting the grinding equipment to grind the blade (1).
2. A method of grinding a gas turbine blade according to claim 1, wherein: in the step 1), in the calibration and adjustment process, the measuring head (2) is in contact with the air inlet side (101) of the blade (1), the rotor of the gas turbine is rotated, and the maximum reading of the dial indicator (4) in the rotation process is taken as the data value of the air inlet side (101).
3. A method of grinding a gas turbine blade according to claim 1, wherein: in the step 1), in the calibration and adjustment process, the measuring head (2) is in contact with the air outlet side (102) of the blade (1), the rotor of the gas turbine is rotated, and the maximum reading of the dial indicator (4) in the rotation process is taken as the data value of the air outlet side (102).
4. A method of grinding a gas turbine blade according to claim 1, wherein: in the step 1), the difference value between the data value of the air outlet side (102) and the data value of the air inlet side (101) is within 0.02 mm.
5. A method of grinding a gas turbine blade according to claim 1, wherein: in the step 2), in the grinding process, the rotation direction of the rotor of the gas turbine is opposite to that of the grinding wheel.
6. A method of grinding a gas turbine blade according to claim 1, wherein: after the current blade (1) is ground, the grinding equipment is moved, and all the blades (1) needing to be ground are ground one by one.
7. A calibration tool for grinding gas turbine blades, comprising: measuring head (2) and percentage table (4), measuring head (2) with the measuring stick fixed connection of percentage table (4), the measuring end of measuring head (2) is arc.
8. A calibration tool for grinding gas turbine blades according to claim 7, wherein: the measuring stick is threaded rod (3), be provided with on measuring head (2) with threaded rod (3) matched with screw thread, threaded rod (3) with measuring head 2 passes through threaded connection.
9. A calibration tool for grinding gas turbine blades according to claim 7, wherein: the measuring surface of the measuring head (2) is hardened.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010762634.6A CN114074271B (en) | 2020-07-31 | 2020-07-31 | Method for grinding gas turbine blade and calibrating tool |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010762634.6A CN114074271B (en) | 2020-07-31 | 2020-07-31 | Method for grinding gas turbine blade and calibrating tool |
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| CN114074271A true CN114074271A (en) | 2022-02-22 |
| CN114074271B CN114074271B (en) | 2024-06-04 |
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| CN114074271B (en) | 2024-06-04 |
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