CN113624118A - Steam turbine blade forked blade root detection device and method - Google Patents
Steam turbine blade forked blade root detection device and method Download PDFInfo
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- CN113624118A CN113624118A CN202110921938.7A CN202110921938A CN113624118A CN 113624118 A CN113624118 A CN 113624118A CN 202110921938 A CN202110921938 A CN 202110921938A CN 113624118 A CN113624118 A CN 113624118A
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- 238000001514 detection method Methods 0.000 title claims abstract description 104
- 238000000034 method Methods 0.000 title claims description 8
- 230000003028 elevating effect Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
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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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- A Measuring Device Byusing Mechanical Method (AREA)
Abstract
The invention discloses a detection device and a detection method for a forked blade root of a turbine blade, wherein the detection device comprises a rack, a workpiece bottom plate, a lifting device, a clamping device, a detection device and a driving device; aiming at the problems of slow manual detection and large workload of the existing manual detection, an automatic detection device is designed to replace the manual detection, a detection gauge is divided into two parts, a no-go gauge and a go gauge are combined, and one detection gauge can realize the maximum tolerance and the minimum tolerance of the width of a detection fork groove; when the first contact and the second contact are connected, the background computer records the distance of the movement distance of the detection gauge in 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 or not can be judged, and whether the length of the fork groove meets the standard or not can be judged on the premise that the tolerance meets the mark or not, 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 forked blade root of a steam turbine blade.
Background
The blades of a steam turbine rotor are generally composed of a blade root, a blade profile and a blade tip. The blade root is the part of the blade connected with the wheel rim, and ensures that the blade can be firmly fixed on the impeller under any operating condition; the blade profile is a working part of the blade and forms a steam flow channel; the top of the blade is the part above the profile.
The detection device is designed for the forked type blade root, the forked type blade root is composed of a plurality of forked tails, and fork grooves are formed between every two adjacent forked tails. Since the fork tail of the blade root needs to be inserted into the fork groove of the rim and fixed by the rivet during assembly, the relative dimensions of the fork tail of the blade root and the fork groove need to be maintained within a certain tolerance range to ensure tight connection.
The width of the fork groove is usually detected by manually applying a no-go gauge and a go gauge in the conventional detection, then the depth of the fork groove is required to be detected, and because a turbine rotor comprises a plurality of blades, the number of blade roots required to be detected is more, and each blade root also comprises a plurality of fork grooves, so that the detection amount of the blades of the turbine rotor is larger, the time consumption is more, and the manufacturing period of the turbine rotor is seriously influenced.
Disclosure of Invention
The invention aims to provide a forked blade root detection device and method for a steam turbine blade, which aim to solve the problems in the prior art.
A fork-shaped blade root detection device for a steam turbine blade comprises a rack, 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 parts, a plurality of guide plates and a detection plate are fixedly connected between the two fixing parts at equal intervals, a first contact is arranged on the detection plate, a detection assembly is connected onto the guide plates in a sliding mode, and a second contact on the detection assembly can be in contact with the first contact to realize electric conduction and is automatically reset;
the driving device is used for driving the fixing piece to slide left and right on the workbench.
Preferably, the determine module is including detecting the rule, detect rule upper and lower equant division go to rule and two parts of no-go gage, detect the both sides fixedly connected with connecting piece of rule, the right wall fixedly connected with traveller of connecting piece, traveller and deflector sliding connection, the cover is equipped with the spring on the traveller between connecting piece and the deflector, the right-hand member of two travelers all with limiting plate fixed connection, the right wall of limiting plate is equipped with contact two.
Preferably, elevating gear includes the lift cylinder, lift cylinder fixed connection is in the fixed station bottom, and its output shaft fixedly connected with lifter plate, a plurality of bracing pieces of fixedly connected with on the lifter plate, bracing piece and work piece bottom plate fixed connection, and with workstation sliding connection.
Preferably, the clamping device comprises two positioning blocks and two clamping cylinders, one of the two positioning blocks is fixedly connected with the workpiece base plate, the other positioning block is fixedly connected with an output shaft of the clamping cylinder and is in sliding connection with the workpiece base plate through a guide rail, and the clamping cylinders are fixedly connected with the workpiece base plate.
Preferably, the driving device comprises a motor, a screw rod and a sliding block, the screw rod is fixedly connected with an output shaft of the motor and is rotatably connected with the workbench through a rotary seat, 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 the sliding block.
Preferably, the method for detecting the blade by using the turbine blade forked blade root detection device specifically comprises the following steps: the blade root is placed on the positioning block, so that the left wall of the blade root is tightly attached to the positioning block, then the clamping cylinder is started to position and clamp the blade root, the workpiece bottom plate is at the highest point, the go gauge part of the detection gauge corresponds to the fork groove of the blade root, then the motor is started, the fixing piece is driven to move leftwards through the rotation of the screw rod, the fixing piece moves leftwards to drive the whole detection device to move leftwards, and the go gauge of the detection gauge slides in the fork groove;
if the width of the fork groove is larger than the diameter of the go gauge, the go gauge can smoothly reach the leftmost end of the fork groove and then is contacted with the leftmost end of the fork groove, the fork groove moves rightwards against the detection gauge, the contact II is communicated with the contact I, and the background computer judges whether the minimum width and the depth of the fork groove meet the standard or not according to the movement distance of the detection gauge;
and then resetting the detection gauge, lowering the workpiece bottom plate to a height position corresponding to the no-go gauge, repeating the operation, stopping the no-go gauge at the rightmost end of the fork groove if the width of the fork groove is smaller than the diameter of the no-go gauge, and judging that the tolerance of the maximum width of the fork groove meets the standard by the background computer, otherwise, not meeting the standard.
The invention has the advantages that:
an automatic detection device is designed to replace manual detection, so that the detection time is greatly reduced;
the detection gauge is divided into two parts, and a no-go gauge and a go gauge are combined, so that the maximum tolerance and the minimum tolerance of the width of the detection fork groove can be realized by one detection gauge;
when the first contact and the second contact are connected, the background computer records the moving distance of the detection 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 or not can be judged, and whether the length of the fork groove meets the standard or not can be judged on the premise that the width of the fork groove meets the label or not can be judged, the length of the fork groove does not need to be measured independently, the measuring workload is reduced, and the detection time length is further greatly reduced.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
Fig. 2 is a schematic view of fig. 1 from another perspective after hiding 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 device, 31-lifting cylinder, 32-lifting plate, 33-supporting rod;
4-clamping device, 41-positioning block, 42-clamping cylinder;
5-a detection device, 50-a fixing part, 51-a guide plate, 52-a detection plate, 521-a contact I, 53-a detection component, 531-a detection gauge, 532-a connecting piece, 533-a sliding column, 534-a spring, 535-a limiting plate and 536-a contact II;
6-driving device, 61-motor, 62-screw rod; 7-blade root, 71-fork groove.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
A fork-shaped blade root detection device for a steam 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 clamping device 4 is arranged on the workpiece bottom plate 2 and used for clamping and fixing the blade root 7; the blade is divided into a blade root, a blade profile and a blade top, which are separately manufactured and connected together through some connecting means.
The detection device 5 comprises two fixing parts 50, a plurality of guide plates 51 and a detection plate 52 are fixedly connected between the two fixing parts 50 at equal intervals, a first contact 521 is arranged on the detection plate 52, a detection assembly 53 is connected onto 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 is automatically reset; the automatic reset here means that the detecting assembly 53 is reset to a state where the second contact 536 is not in contact with the first contact 521 by the spring 535.
The driving device 6 is used for driving the fixing member 50 to slide left and right on the workbench 1 a.
In this embodiment, the detection assembly 53 includes the detection gauge 531, the detection gauge 531 is divided into two parts of go gauge and no-go gauge equally from top to bottom, the both sides fixedly connected with connecting piece 532 of the detection gauge 531, the right wall fixedly connected with traveller 533 of connecting piece 532, traveller 533 and deflector 51 sliding connection, the cover is equipped with the spring 534 on the traveller 533 between connecting piece 532 and the deflector 51, the right-hand member of two travellers 533 all with limiting plate 535 fixed connection, the right wall of limiting plate 535 is equipped with contact two 536. The second contact 536 and the first contact 521 are connected to the background computer, and when the two are connected, the background computer can detect the electric signal.
In this embodiment, the lifting device 3 includes a lifting cylinder 31, the lifting cylinder 31 is fixedly connected to the bottom of the fixing table 1b, and an output shaft of the lifting cylinder is fixedly connected to a lifting plate 32, a plurality of support rods 33 are fixedly connected to the lifting plate 32, the support rods 33 are fixedly connected to the workpiece bottom plate 2, and are slidably connected to the working table 1 a.
In this embodiment, the clamping device 4 includes two positioning blocks 41 and a clamping cylinder 42, where one of the two positioning blocks 41 is fixedly connected to the workpiece base plate 2, the other one of the two positioning blocks 41 is fixedly connected to an output shaft of the clamping cylinder 42 and slidably connected to the workpiece base plate 2 through a guide rail, and the clamping cylinder 42 is fixedly connected to the workpiece base plate 2.
In this embodiment, the driving device 6 includes a motor 61, a screw 62, and a slider, the screw 62 is fixedly connected to an output shaft of the motor 61 and rotatably connected to the working table 1a through a rotating base, the screw 62 is further connected to the slider through a screw nut, and the slider is fixedly connected to the lower fixing member 50.
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 through 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 gauge of the detection gauge 531 corresponds to that of the fork groove 71, and the detection device 5 moves leftwards to move the go gauge towards the length direction of the fork groove 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 the leftmost end of the fork groove 71 is reached, then the detection gauge 531 is contacted with the leftmost end of the fork groove 71, the detection gauge 531 continues moving leftwards, the fork groove 71 moves rightwards against the detection gauge 531, the spring 534 is compressed, the contact two 536 is communicated with the contact one 521, the background computer detects the signal, the moving distance of the detection gauge 531 is recorded, the distance is compared with the standard distance, and whether the minimum width and the depth of the fork groove 71 meet the standard or not is judged. The standard distance here is the sum of the distance from the initial position of the detection gauge 531 to the rightmost end of the fork groove 71 and the length of the standard fork groove 71.
If the moving distance of the detection gauge 531 is greater than the standard distance, it represents that the length of the fork groove 71 is too long;
if the moving distance of the detection gauge 531 is equal to the standard distance, the length of the fork groove 71 is qualified;
if the moving distance of the detection gauge 531 is equal to the distance from the initial position of the detection gauge 531 to the rightmost end of the fork groove 71, it indicates that the detection gauge 531 is clamped by the go gauge due to the small width of the fork groove 71 when just contacting the fork groove 71, and the background computer judges that the minimum value of the width of the fork groove 71 at the corresponding position does not meet the standard;
if the distance that the detection gauge 531 moves is between the standard distance and the distance from the initial position of the detection gauge 531 to the rightmost end of the fork groove 71, it means that the length of the fork groove 71 is too short.
Through the above judgment logic, whether the width and the length of the fork groove 71 are qualified or not can be obtained.
The motor 61 stops moving at the moment when the first contact 521 is connected with the second contact 536, after the background computer records data, the detection device 5 is reset under the action of the driving device 6, the detection gauge 531 is also reset under the action of the spring 534, the workpiece bottom plate 2 is lowered to the height position of the fork groove 71 corresponding to the no-go gauge under the action of the lifting cylinder 31, and at the moment, the fork groove 71 is located at the center position of the no-go gauge.
And 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 I521 is communicated with the contact II 536, and the background computer judges that the tolerance of the maximum width of the fork groove 71 meets the standard, otherwise, the tolerance does not meet the standard.
Based on the above: the detection gauge 531 is divided into two parts, and a no-go gauge and a go gauge are combined, so that one detection gauge 531 can realize the maximum tolerance and the minimum tolerance of the width of the detection fork groove 71;
when the first contact 521 is connected with the second contact 536, 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 or not can be judged, and whether the length of the fork groove 71 meets the standard or not can be judged on the premise that the tolerance meets the label or not can be judged, the length of the fork groove 71 does not need to be measured independently, the measurement workload is reduced, and the detection time length is further greatly reduced.
It will be appreciated by those skilled in the art that the invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The embodiments disclosed above are therefore to be considered in all respects as illustrative and not restrictive. All changes which come within the scope of or equivalence to the invention are intended to be embraced therein.
Claims (6)
1. A forked blade root detection device for a steam turbine blade is characterized by comprising a rack (1), a workpiece base plate (2), a lifting device (3), a clamping device (4), a detection device (5) and a driving device (6);
the machine 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 detection device (5) comprises two fixing parts (50), a plurality of guide plates (51) and a detection plate (52) are fixedly connected between the two fixing parts (50) at equal intervals, a first contact (521) is arranged on the detection plate (52), a detection assembly (53) is connected onto 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 electric conduction and is automatically reset;
the driving device (6) is used for driving the fixing piece (50) to slide left and right on the workbench (1 a).
2. The steam turbine blade forked blade root detection device according to claim 1, characterized in that, the detection assembly (53) includes a detection gauge (531), the detection gauge (531) is divided into a go gauge and a no-go gauge, the upper and lower ends of the detection gauge (531) are fixedly connected with a connecting piece (532), the right wall of the connecting piece (532) is fixedly connected with a sliding column (533), the sliding column (533) is slidably connected with a guide plate (51), a spring (534) is sleeved on the sliding column (533) between the connecting piece (532) and the guide plate (51), the right ends of the two sliding columns (533) are fixedly connected with a limit plate (535), and the right wall of the limit plate (535) is provided with a contact point two (536).
3. The forked blade root detection device for steam turbine blades as claimed in claim 2, wherein said lifting device (3) comprises a lifting cylinder (31), said lifting cylinder (31) is fixedly connected to the bottom of the fixed platform (1b), and its output shaft is fixedly connected to a lifting plate (32), said lifting plate (32) is fixedly connected to a plurality of support rods (33), said support rods (33) are fixedly connected to the workpiece base plate (2) and slidably connected to the working platform (1 a).
4. The forked blade root detection device for steam turbine blades according to claim 3, characterized in that the clamping device (4) comprises two positioning blocks (41) and two clamping cylinders (42), one of the two positioning blocks (41) is fixedly connected to the workpiece base plate (2), the other positioning block (41) is fixedly connected to the output shaft of the clamping cylinder (42) and is slidably connected to the workpiece base plate (2) through a guide rail, and the clamping cylinder (42) is fixedly connected to the workpiece base plate (2).
5. The forked blade root detection device for steam turbine blades as claimed in claim 4, wherein said drive device (6) comprises a motor (61), a lead screw (62) and a slider, said lead screw (62) is fixedly connected to the output shaft of the motor (61) and rotatably connected to the platform (1a) through a rotation base, said lead screw (62) is further connected to the slider through a lead screw nut, said slider is fixedly connected to the lower fixture (50), and said motor (61) is fixedly connected to the platform (1 a).
6. The method for detecting the blade root by adopting the forked blade root detection device of the steam turbine blade as claimed in claim 5 is characterized by comprising the following steps: the method comprises the steps that a blade root (7) is placed on a positioning block (41), the left wall of the blade root (7) is made to be tightly attached to the positioning block (41), then a clamping cylinder (42) is started to position and clamp the blade root (7), the workpiece bottom plate (2) is located at the highest point, the through gauge part of a detection gauge (531) corresponds to a fork groove (71) of the blade root (7), then a motor (61) is started, a lead screw (62) rotates to drive a fixing piece (50) to move leftwards, the fixing piece (50) moves leftwards to drive the whole detection device (5) to move leftwards, and the through 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 go gauge, the go gauge can smoothly reach the leftmost end of the fork groove (71) and then is contacted with the leftmost end of the fork groove (71), the fork groove (71) moves right 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 the depth of the fork groove (71) meet the standard or not 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 no-go gauge, the operation is repeated, 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), 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 (71) does not meet the standard.
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 true CN113624118A (en) | 2021-11-09 |
| CN113624118B 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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Citations (7)
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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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| CN113624118B (en) | 2024-04-09 |
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