CN113624118B - Device and method for detecting fork-shaped blade root of turbine blade - Google Patents
Device and method for detecting fork-shaped blade root of turbine blade Download PDFInfo
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- CN113624118B CN113624118B CN202110921938.7A CN202110921938A CN113624118B CN 113624118 B CN113624118 B CN 113624118B CN 202110921938 A CN202110921938 A CN 202110921938A CN 113624118 B CN113624118 B CN 113624118B
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- 238000000034 method Methods 0.000 title claims description 7
- 238000001514 detection method Methods 0.000 claims abstract description 81
- 230000000903 blocking effect Effects 0.000 description 2
- 241000233866 Fungi Species 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Classifications
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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
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/02—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- A Measuring Device Byusing Mechanical Method (AREA)
Abstract
The invention discloses a detection device and a detection method for a fork-shaped blade root of a turbine blade, comprising a frame, a workpiece bottom plate, a lifting device, a clamping device, a detection device and a driving device; aiming at the existing manual detection slow, the automatic detection device is designed with great workload, replaces manual detection, divides the detection gauge into two parts, combines the no-go gauge with the go gauge, and can realize the maximum and minimum two tolerances of the width of the detection fork groove by one detection gauge; when the first contact and the second contact are connected, the background computer records the distance between the detection gauge and the movable distance of the fork groove, and then compares the distance with a preset value, so that whether the width tolerance of the fork groove meets the standard can be judged, and whether the length of the fork groove meets the standard on the premise that the tolerance meets the mark can be judged, the length of the fork groove does not need to be measured independently, the measuring workload is reduced, and the detection duration is further greatly reduced.
Description
Technical Field
The invention relates to the field of detection, in particular to a device and a method for detecting a fork-shaped blade root of a turbine blade.
Background
The blades of a turbine rotor are generally composed of three parts, namely a blade root, a blade profile and a blade tip. The blade root is the part of the blade connected with the rim, which ensures that the blade can be firmly fixed on the impeller under any running condition; the blade profile is the working part of the blade, which forms the steam flow channel; the tip is the part above the profile.
The common blade root types include T-shaped blade root, fork-shaped blade root, fir-shaped blade root and fungus type, the detection device is designed aiming at the fork-shaped blade root, the fork-shaped blade root is composed of a plurality of fork tails, and fork grooves are formed between adjacent fork tails. Since the blade root prongs are required to be inserted into the rim prongs and fixed by rivets during assembly, the blade root prongs and the prongs are required to be sized within a certain tolerance to ensure the tightness of the connection.
The conventional detection generally adopts a manual application of a no-go gauge and a go gauge to detect the width of the fork groove, and then the depth of the fork groove is detected, and as a steam turbine rotor comprises a plurality of blades, the number of blade roots to be detected is more, and each blade root also comprises a plurality of fork grooves, so that the blade detection amount of the steam turbine rotor is larger, the time consumption is more, and the manufacturing period of the steam turbine rotor is seriously influenced.
Disclosure of Invention
The invention aims to provide a device and a method for detecting a fork-shaped blade root of a turbine blade, which are used for solving the problems in the prior art.
A detection device for a fork-shaped blade root of a turbine blade comprises a frame, a workpiece bottom plate, a lifting device, a clamping device, a detection device and a driving device;
the machine frame comprises a workbench and a fixed table, the workbench is fixedly connected to the fixed table, the workpiece bottom plate is arranged above the workbench, and the lifting device is used for driving the workpiece bottom plate to move up and down;
the clamping device is arranged on the workpiece bottom plate and used for clamping and fixing the blade root;
the detection device comprises two fixing pieces, a plurality of guide plates and detection plates are fixedly connected between the fixing pieces at equal intervals, a first contact is arranged on the detection plates, a detection assembly is connected to the guide plates in a sliding mode, and a second contact on the detection assembly can be in electrical conduction with the first contact and automatically reset;
the driving device is used for driving the fixing piece to slide left and right on the workbench.
Preferably, the detection assembly comprises a detection gauge, the detection gauge is divided into two parts, namely a go gauge and a no-go gauge, the two sides of the detection gauge are fixedly connected with connecting pieces, the right wall of each connecting piece is fixedly connected with a sliding column, the sliding columns are in sliding connection with a guide plate, springs are sleeved on the sliding columns between the connecting pieces and the guide plate, the right ends of the two sliding columns are fixedly connected with a limiting plate, and the right wall of the limiting plate is provided with a second contact.
Preferably, the lifting device comprises a lifting cylinder, the lifting cylinder is fixedly connected to the bottom of the fixed table, an output shaft of the lifting cylinder is fixedly connected with a lifting plate, a plurality of support rods are fixedly connected to the lifting plate, and the support rods are fixedly connected with the workpiece bottom plate and are in sliding connection with the workbench.
Preferably, the clamping device comprises two positioning blocks and clamping cylinders, wherein one positioning block is fixedly connected with the workpiece bottom plate, the other positioning block is fixedly connected with an output shaft of the clamping cylinder and is in sliding connection with the workpiece bottom plate through a guide rail, and the clamping cylinders are fixedly connected with the workpiece bottom plate.
Preferably, the driving device comprises a motor, a screw rod and a sliding block, wherein the screw rod is fixedly connected with an output shaft of the motor and is rotationally connected with the workbench through a swivel mount, the screw rod is further connected with the sliding block through a screw rod nut, and the sliding block is fixedly connected with a fixing piece below.
Preferably, the method for detecting the blade by using the fork-type blade root detection device of the turbine blade is as follows: placing the blade root on a positioning block, enabling the left wall of the blade root to be clung to the positioning block, then starting a clamping cylinder to position and clamp the blade root, enabling a workpiece bottom plate to be at the highest point, enabling a go gauge part of a detection gauge to correspond to a fork groove of the blade root, starting a motor, driving a fixing piece to move leftwards through rotation of a screw rod, enabling the fixing piece to move leftwards to drive the whole detection device to move leftwards, and enabling the go gauge of the detection gauge to slide in the fork groove;
if the width of the fork groove is larger than the diameter of the through gauge, the through gauge can smoothly reach the leftmost end of the fork groove, then the fork groove contacts with the leftmost end of the fork groove, the fork groove moves rightwards against the detection gauge, the second contact is communicated with the first contact, and the background computer judges whether the minimum width and the depth of the fork groove accord with the standard according to the movement distance of the detection gauge;
and then resetting the detection gauge, lowering the workpiece bottom plate to the height position corresponding to the non-stop gauge, repeating the operation, and if the width of the fork groove is smaller than the diameter of the non-stop gauge, blocking the non-stop gauge at the rightmost end of the fork groove, and judging that the maximum width tolerance of the fork groove meets the standard by a background computer, otherwise, not meeting the standard.
The invention has the advantages that:
an automatic detection device is designed, manual detection is replaced, and the detection time is greatly reduced;
the detection gauge is divided into two parts, the non-stop gauge and the go gauge are combined, and one detection gauge can realize the maximum and minimum two tolerances of the width of the detection fork groove;
when the first contact and the second contact are connected, the background computer records the moving distance of the detecting gauge in the fork groove and then compares the moving distance with a preset value, so that whether the width of the fork groove meets the standard can be judged, whether the length of the fork groove meets the standard on the premise that the width of the fork groove meets the mark can be judged, the length of the fork groove does not need to be measured independently, the measuring workload is reduced, and the detecting duration is further greatly reduced.
Drawings
Fig. 1 is a schematic diagram of the overall structure of the present invention.
Fig. 2 is a schematic view of fig. 1 from another view after concealing the blade root.
Fig. 3 is a side view of the present invention.
Fig. 4 is a schematic view of a part of the structure of the detection device.
In the figure: 1-a frame, 1 a-a workbench, 1 b-a fixed table and 2-a workpiece bottom plate;
3-lifting devices, 31-lifting cylinders, 32-lifting plates and 33-supporting rods;
4-clamping devices, 41-positioning blocks and 42-clamping cylinders;
the device comprises a 5-detection device, a 50-fixing piece, a 51-guide plate, a 52-detection plate, a 521-contact I, a 53-detection component, a 531-detection gauge, a 532-connecting piece, a 533-slide column, a 534-spring, a 535-limiting plate and a 536-contact II;
6-driving device, 61-motor and 62-screw rod; 7-blade root, 71-fork groove.
Detailed Description
The invention is further described in connection with the following detailed description, in order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the invention easy to understand.
A detection device for a fork-shaped blade root of a turbine blade comprises a frame 1, a workpiece bottom plate 2, a lifting device 3, a clamping device 4, a detection device 5 and a driving device 6;
the frame 1 comprises a workbench 1a and a fixed table 1b, the workbench 1a is fixedly connected to the fixed table 1b, the workpiece bottom plate 2 is arranged above the workbench 1a, and the lifting device 3 is used for driving the workpiece bottom plate 2 to move up and down.
The clamping device 4 is arranged on the workpiece bottom plate 2 and is used for clamping and fixing the blade root 7; the blade is divided into a blade root, a blade profile and a blade tip, and the three parts are separately manufactured and then connected together through some connecting means.
The detection device 5 comprises two fixing pieces 50, wherein a plurality of guide plates 51 and detection plates 52 are fixedly connected between the two fixing pieces 50 at equal intervals, a first contact 521 is arranged on the detection plates 52, a detection component 53 is connected to the guide plates 51 in a sliding manner, and a second contact 536 on the detection component 53 can be in contact with the first contact 521 to realize electrical conduction and automatically reset; the automatic reset means that the detection component 53 is reset to a state where the contact two 536 is not in contact with the contact one 521 by the action of the spring 535.
The driving device 6 is used for driving the fixing piece 50 to slide left and right on the workbench 1 a.
In this embodiment, the detection component 53 includes a detection gauge 531, the detection gauge 531 is divided into two parts of a go gauge and a no-go gauge, two sides of the detection gauge 531 are fixedly connected with a connecting piece 532, a right wall of the connecting piece 532 is fixedly connected with a sliding column 533, the sliding column 533 is slidably connected with the guide plate 51, a spring 534 is sleeved on the sliding column 533 between the connecting piece 532 and the guide plate 51, right ends of the two sliding columns 533 are fixedly connected with a limiting plate 535, and a contact two 536 is arranged on a right wall of the limiting plate 535. Contact two 536 and contact one 521 are connected to the background computer, which can detect this signal when both are on.
In this embodiment, the lifting device 3 includes a lifting cylinder 31, the lifting cylinder 31 is fixedly connected to the bottom of the fixed table 1b, and an output shaft thereof is fixedly connected with a lifting plate 32, a plurality of support rods 33 are fixedly connected to the lifting plate 32, and the support rods 33 are fixedly connected to the workpiece bottom plate 2 and slidably connected to the working table 1 a.
In this embodiment, the clamping device 4 includes two positioning blocks 41 and clamping cylinders 42, where one positioning block 41 is fixedly connected with the workpiece bottom plate 2, the other positioning block 41 is fixedly connected with an output shaft of the clamping cylinder 42, and is slidably connected with the workpiece bottom plate 2 through a guide rail, and the clamping cylinder 42 is fixedly connected with the workpiece bottom plate 2.
In this embodiment, the driving device 6 includes a motor 61, a screw rod 62, and a slider, where the screw rod 62 is fixedly connected with an output shaft of the motor 61 and is rotationally connected with the workbench 1a through a swivel mount, the screw rod 62 is further connected with the slider through a screw nut, and the slider is fixedly connected with the fixing piece 50 below.
The working process and the principle thereof are as follows:
the device is specially used for detecting the length and the width of the fork groove of the blade root, the blade root 7 is placed on the positioning block 41 during detection, the left wall of the blade root 7 is tightly attached to the positioning block 41, then the clamping cylinder 42 is started to position and clamp the blade root 7, the workpiece bottom plate 2 is at the highest point, and the through gauge part of the detection gauge 531 corresponds to the fork groove 71 of the blade root 7.
Then the motor 61 is started, the fixing piece 50 is driven to move leftwards by the rotation of the screw rod 62, the fixing piece 50 moves leftwards to drive the whole detection device 5 to move leftwards, the number of the go gauges 531 of the detection device 5 corresponds to that of the fork grooves 71, and the left-moving go gauges of the detection device 5 move towards the length direction of the fork grooves 71;
if the width of the fork groove 71 is larger than the diameter of the through gauge, the through gauge can move leftwards under the condition of no blocking until reaching the leftmost end of the fork groove 71, then the detecting gauge 531 contacts with the leftmost end of the fork groove 71, the detecting gauge 531 continues to move leftwards, the fork groove 71 moves rightwards against the detecting gauge 531, the spring 534 is compressed, the contact two 536 is communicated with the contact one 521, a background computer detects the signal, records the moving distance of the detecting gauge 531, and compares the distance with the standard distance to judge whether the minimum width and depth of the fork groove 71 meet the standard. The standard distance here refers to the sum of the distance from the initial position of the gauge 531 to the rightmost end of the fork groove 71 and the length of the standard fork groove 71.
If the movement distance of the gauge 531 is greater than the standard distance, the length of the fork groove 71 is too long;
if the movement distance of the gauge 531 is equal to the standard distance, it indicates that the fork groove 71 is qualified;
if the moving distance of the gauge 531 is equal to the distance from the initial position of the gauge 531 to the rightmost end of the fork groove 71, it indicates that the gauge is blocked by the gauge due to the smaller width of the fork groove 71 when the gauge 531 is just contacted with the fork groove 71, and the background computer judges that the minimum width value of the fork groove 71 at the corresponding position does not meet the standard;
if the distance traveled by the gauge 531 is between the standard distance and the distance from the initial position of the gauge 531 to the far right end of the fork 71, this means that the length of the fork 71 is too short.
By the above judgment logic, whether the width and length of the fork groove 71 are qualified or not can be obtained.
The motor 61 stops moving at the moment that the first contact 521 is connected with the second contact 536, after the background computer records data, the detection device 5 resets under the action of the driving device 6, the detection gauge 531 also resets under the action of the spring 534, the workpiece bottom plate 2 descends to the height position corresponding to the fork groove 71 and the non-stop gauge under the action of the lifting cylinder 31, and at the moment, the fork groove 71 is positioned at the center of the non-stop gauge.
Repeating the operation, if the width of the fork groove 71 is smaller than the diameter of the no-go gauge, the no-go gauge is blocked at the rightmost end of the fork groove 71, the contact one 521 is communicated with the contact two 536, and the background computer judges that the maximum width tolerance of the fork groove 71 meets the standard, otherwise, the maximum width tolerance of the fork groove 71 does not meet the standard.
Based on the above: the detecting gauge 531 is divided into two parts, and the non-stop gauge and the go gauge are combined, so that one detecting gauge 531 can realize the maximum and minimum two tolerances of the width of the detecting fork groove 71;
when the contact one 521 and the contact two 536 are connected, the background computer records the distance of the movement distance of the detection gauge 531 in the fork groove 71, and then compares the distance with a preset value, so that whether the width tolerance of the fork groove 71 meets the standard can be judged, and whether the length of the fork groove 71 meets the standard on the premise that the tolerance meets the mark can be judged, the length of the fork groove 71 does not need to be measured independently, the measuring workload is reduced, and the detection duration is further greatly reduced.
It will be appreciated by those skilled in the art that the present invention can be carried out in other embodiments without departing from the spirit or essential characteristics thereof. Accordingly, the above disclosed embodiments are illustrative in all respects, and not exclusive. All changes that come within the scope of the invention or equivalents thereto are intended to be embraced therein.
Claims (1)
1. The device for detecting the fork-shaped blade root of the turbine blade is characterized by comprising a frame (1), a workpiece bottom plate (2), a lifting device (3), a clamping device (4), a detecting device (5) and a driving device (6);
the machine frame (1) comprises a workbench (1 a) and a fixed table (1 b), the workbench (1 a) is fixedly connected to the fixed table (1 b), the workpiece bottom plate (2) is arranged above the workbench (1 a), and the lifting device (3) is used for driving the workpiece bottom plate (2) to move up and down;
the clamping device (4) is arranged on the workpiece bottom plate (2) and is used for clamping and fixing the blade root (7);
the detection device (5) comprises two fixing pieces (50), wherein a plurality of guide plates (51) and detection plates (52) are fixedly connected between the two fixing pieces (50) at equal intervals, a first contact (521) is arranged on the detection plates (52), a detection assembly (53) is connected to the guide plates (51) in a sliding manner, and a second contact (536) on the detection assembly (53) can be in contact with the first contact (521) to realize electrical conduction and automatic resetting;
the driving device (6) is used for driving the fixing piece (50) to slide left and right on the workbench (1 a);
the detection assembly (53) comprises a detection gauge (531), the detection gauge (531) is divided into two parts, namely a go gauge and a no-go gauge, the upper end and the lower end of the detection gauge (531) are fixedly connected with connecting pieces (532), the right wall of each connecting piece (532) is fixedly connected with a sliding column (533), each sliding column (533) is in sliding connection with a guide plate (51), springs (534) are sleeved on the sliding columns (533) between each connecting piece (532) and each guide plate (51), the right ends of the two sliding columns (533) are fixedly connected with limiting plates (535), and the right wall of each limiting plate (535) is provided with a second contact (536);
the lifting device (3) comprises a lifting cylinder (31), the lifting cylinder (31) is fixedly connected to the bottom of the fixed table (1 b), an output shaft of the lifting cylinder is fixedly connected with a lifting plate (32), a plurality of support rods (33) are fixedly connected to the lifting plate (32), and the support rods (33) are fixedly connected with the workpiece bottom plate (2) and are in sliding connection with the workbench (1 a);
the clamping device (4) comprises two positioning blocks (41) and clamping air cylinders (42), wherein one positioning block (41) is fixedly connected with the workpiece bottom plate (2), the other positioning block (41) is fixedly connected with an output shaft of the clamping air cylinder (42) and is in sliding connection with the workpiece bottom plate (2) through a guide rail, and the clamping air cylinders (42) are fixedly connected with the workpiece bottom plate (2);
the driving device (6) comprises a motor (61), a screw rod (62) and a sliding block, wherein the screw rod (62) is fixedly connected with an output shaft of the motor (61) and is rotationally connected with the workbench (1 a) through a swivel mount, the screw rod (62) is also connected with the sliding block through a screw rod nut, the sliding block is fixedly connected with a fixing piece (50) below, and the motor (61) is fixedly connected with the workbench (1 a);
the method for detecting the blade root by adopting the fork-shaped blade root detection device of the turbine blade comprises the following steps: placing the blade root (7) on the positioning block (41) so that the left wall of the blade root (7) is clung to the positioning block (41), then starting the clamping cylinder (42) to position and clamp the blade root (7), wherein the workpiece bottom plate (2) is at the highest point, the go gauge part of the detection gauge (531) corresponds to the fork groove (71) of the blade root (7), then starting the motor (61), driving the fixing piece (50) to move leftwards through the rotation of the screw rod (62), and driving the whole detection device (5) to move leftwards through the left movement of the fixing piece (50), and the go gauge of the detection gauge (531) slides in the fork groove (71);
if the width of the fork groove (71) is larger than the diameter of the gauge, the gauge can smoothly reach the leftmost end of the fork groove (71), then the gauge is contacted with the leftmost end of the fork groove (71), the fork groove (71) moves rightwards against the detection gauge (531), the contact II (536) is communicated with the contact I (521), and the background computer judges whether the minimum width and depth of the fork groove (71) meet the standard according to the movement distance of the detection gauge (531);
and then the detection gauge (531) is reset, the workpiece bottom plate (2) is lowered to the height position corresponding to the non-stop gauge, the operation is repeated, if the width of the fork groove (71) is smaller than the diameter of the non-stop gauge, the non-stop gauge is blocked at the rightmost end of the fork groove (71), and the background computer judges that the tolerance of the maximum width of the fork groove (71) meets the standard, otherwise, the tolerance of the maximum width of the fork groove is not met.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110921938.7A CN113624118B (en) | 2021-08-12 | 2021-08-12 | Device and method for detecting fork-shaped blade root of turbine blade |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110921938.7A CN113624118B (en) | 2021-08-12 | 2021-08-12 | Device and method for detecting fork-shaped blade root of turbine blade |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113624118A CN113624118A (en) | 2021-11-09 |
| CN113624118B true CN113624118B (en) | 2024-04-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110921938.7A Active CN113624118B (en) | 2021-08-12 | 2021-08-12 | Device and method for detecting fork-shaped blade root of turbine blade |
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| CN (1) | CN113624118B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| GB646044A (en) * | 1947-11-10 | 1950-11-15 | Napier & Son Ltd | Improvements in or relating to gauging tools |
| CN204807003U (en) * | 2015-07-17 | 2015-11-25 | 浙江畅尔智能装备股份有限公司 | Detection mechanism |
| CN206291808U (en) * | 2016-12-06 | 2017-06-30 | 佛山市诺迪精密模具有限公司 | One kind gearshift finger pressure dress cubing |
| CN109596023A (en) * | 2019-01-14 | 2019-04-09 | 重庆泽信数控机械制造有限公司 | Automobile camshaft thread testing machine |
| CN111189373A (en) * | 2020-03-11 | 2020-05-22 | 安徽誉特双节能技术有限公司 | Blade root detection device of turbine blade |
| CN111473708A (en) * | 2020-04-27 | 2020-07-31 | Oppo（重庆）智能科技有限公司 | Go-no go gauge and control circuit thereof |
| CN113237408A (en) * | 2021-05-19 | 2021-08-10 | 山东蜜蜂智能制造有限公司 | Automatic detection line for adjusting arm and detection method for adjusting arm hole through and stop |
-
2021
- 2021-08-12 CN CN202110921938.7A patent/CN113624118B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB646044A (en) * | 1947-11-10 | 1950-11-15 | Napier & Son Ltd | Improvements in or relating to gauging tools |
| CN204807003U (en) * | 2015-07-17 | 2015-11-25 | 浙江畅尔智能装备股份有限公司 | Detection mechanism |
| CN206291808U (en) * | 2016-12-06 | 2017-06-30 | 佛山市诺迪精密模具有限公司 | One kind gearshift finger pressure dress cubing |
| CN109596023A (en) * | 2019-01-14 | 2019-04-09 | 重庆泽信数控机械制造有限公司 | Automobile camshaft thread testing machine |
| CN111189373A (en) * | 2020-03-11 | 2020-05-22 | 安徽誉特双节能技术有限公司 | Blade root detection device of turbine blade |
| CN111473708A (en) * | 2020-04-27 | 2020-07-31 | Oppo（重庆）智能科技有限公司 | Go-no go gauge and control circuit thereof |
| CN113237408A (en) * | 2021-05-19 | 2021-08-10 | 山东蜜蜂智能制造有限公司 | Automatic detection line for adjusting arm and detection method for adjusting arm hole through and stop |
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|---|---|
| CN113624118A (en) | 2021-11-09 |
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