CN112665809A - Fixture and method suitable for variable natural frequency and adjustable angle of turbine blade - Google Patents
Fixture and method suitable for variable natural frequency and adjustable angle of turbine blade Download PDFInfo
- Publication number
- CN112665809A CN112665809A CN202011461409.5A CN202011461409A CN112665809A CN 112665809 A CN112665809 A CN 112665809A CN 202011461409 A CN202011461409 A CN 202011461409A CN 112665809 A CN112665809 A CN 112665809A
- Authority
- CN
- China
- Prior art keywords
- fixed support
- natural frequency
- clamp
- support ring
- turbine blade
- 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
- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000003825 pressing Methods 0.000 claims abstract description 23
- 230000005284 excitation Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000009661 fatigue test Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Images
Landscapes
- Clamps And Clips (AREA)
Abstract
The invention belongs to the technical field of turbine blade tests, and discloses a clamp and a method suitable for the turbine blade with variable natural frequency and adjustable angle.A clamp main body comprises a base and a frame consisting of three struts standing on the base, a fixed support ring is arranged among the three struts, wherein two struts are contacted with the two sides in front of the fixed support ring, and the other strut is contacted with the middle behind the fixed support ring; the tops of the three support columns are connected, a large threaded hole is formed in the connecting center, a large bolt supports the pressing block from top to bottom through the large threaded hole, the lower portion of the pressing block supports the fastening support ring, and the lower portion of the fastening support ring is in contact with the base; the middle of the fixed support ring is provided with a cavity which is through from front to back, a clamping device used for clamping the blade is arranged in the cavity, and the clamping device is fixed by a fixed support bolt. The clamp is used for fixing the turbine blade, is simple in use method and reliable in structure, and can be used for solving the problem of variable natural frequency of the clamp and adjusting the angle of the turbine blade.
Description
Technical Field
The invention belongs to the technical field of turbine blade tests, relates to a blade clamp, and particularly relates to a clamp and a method suitable for the turbine blade with variable natural frequency and adjustable angle.
Background
The turbine blade is one of important key parts of an aeroengine and is responsible for energy conversion. In order to avoid failure caused by high cycle fatigue, caruncle, creep deformation and the like of the turbine blade and to check the manufacturing quality of the turbine blade, the turbine blade needs to pass a vibration fatigue test.
The traditional turbine blade clamp is usually fixedly supported by a door-shaped clamp, and the natural frequency of the clamp and the natural frequency of a blade are overlapped, so that a vibration table cannot well retain the frequency; meanwhile, because the blade body of the turbine blade is different from the tenon in a certain angle, excitation in the vertical direction of the vibration table cannot be conducted effectively, and the turbine blade cannot be examined effectively.
Disclosure of Invention
The purpose of the invention is as follows:
in order to solve the problems, the invention provides a clamp and a method suitable for the turbine blade with variable natural frequency and adjustable angle, which can well improve the frequency overlapping condition and solve the problem that excitation energy cannot be well conducted due to the existence of angle difference.
The technical scheme is as follows:
a clamp suitable for turbine blade with variable natural frequency and adjustable angle comprises a clamp main body, a big bolt, a pressing block, a fixed support ring, a fixed support bolt and a clamping device; the clamp main body comprises a base and a frame consisting of three support columns standing on the base, a fixed support ring is arranged among the three support columns, two support columns are in contact with two sides in front of the fixed support ring, and the other support column is in contact with the middle in the rear of the fixed support ring; the tops of the three support columns are connected, a large threaded hole is formed in the connecting center, a large bolt supports the pressing block from top to bottom through the large threaded hole, the lower portion of the pressing block supports the fastening support ring, and the lower portion of the fastening support ring is in contact with the base; the middle of the fixed support ring is provided with a cavity which is through from front to back, a clamping device used for clamping the blade is arranged in the cavity, and the clamping device is fixed by a fixed support bolt.
Furthermore, the fixed support ring is of a circular ring structure, and when the large bolt moves upwards so that the pressing block does not abut against the fixed support ring, the fixed support ring can rotate in the clamp body.
Furthermore, the lower part of the pressing block is provided with an arc surface matched with the fixed support ring, and the part of the upper part of the base, which is contacted with the fixed support ring, is provided with an arc surface matched with the fixed support ring.
Furthermore, the ring surface of the fixed support ring is provided with scales, and the position of the pillar corresponding to the scales of the fixed support ring is also provided with scales.
Furthermore, the arc side surface of the fixed support ring is provided with a small threaded hole communicated with the cavity, and the fixed support bolt fixes the clamping device from outside to inside through the small threaded hole; the small threaded hole is provided with a countersunk head structure, and the depth of the countersunk head is greater than the height of the top of the fixed bolt.
Furthermore, the three supporting columns are provided with longitudinal round holes with openings at the tops, internal threads are arranged on the longitudinal round holes, and the three adjustable bolts are connected with the three supporting columns through the longitudinal round holes.
Furthermore, the adjustable bolts are a series of bolts with different lengths, and the depth of the longitudinal round hole is matched with the longest adjustable bolt; and selecting adjustable bolts with different lengths to be screwed into the longitudinal round holes of the support columns according to the required natural frequency.
Furthermore, the adjustable bolt is connected with the support column through the washer.
The method for adjusting the natural frequency and the angle of the turbine blade uses the clamp which is suitable for the turbine blade and has variable natural frequency and adjustable angle, and after a fixed support ring is placed into the clamp body from the side surface of the clamp body, the clamping angle of the turbine blade is adjusted by rotating the fixed support ring; then clamping the blade by using a clamping device, fixing the clamping device by using a fixed support bolt, and fixing a fixed support ring by using a big bolt and a pressing block; finally, the natural frequency of the fixture is adjusted.
Further, the method for adjusting the natural frequency of the clamp specifically comprises the following steps: the natural frequency of the clamp is adjusted by using the adjustable bolts and the washers, and for each strut, the natural frequency of the clamp is adjusted by selecting a mode of not installing the adjustable bolts or installing the adjustable bolts with different lengths and selecting different numbers of washers.
The invention has the advantages that:
the clamp is used for fixing the turbine blade, is simple in use method and reliable in structure, and can be used for solving the problem of variable natural frequency of the clamp and adjusting the angle of the turbine blade. Therefore, the natural frequency of the clamp can be adjusted to be not overlapped with the natural frequency of the blade, the vibration table can be well subjected to frequency standing, excitation in the vertical direction of the vibration table can be effectively conducted, and the turbine blade can be conveniently examined.
Drawings
FIG. 1 is a schematic view of the construction of the clamp of the present invention;
FIG. 2 is a front view of the clamp of the present invention;
FIG. 3 is a front cross-sectional view of the clip of the present invention;
FIG. 4 is a side cross-sectional view of the clamp of the present invention;
the clamp comprises a clamp body 1, a large bolt 2, a pressing block 3, a fixed support ring 4, a fixed support bolt 5, a clamping device 6, an adjustable bolt 7 and a gasket 8.
Detailed Description
This section is an example of the present invention and is provided to explain and illustrate the technical solutions of the present invention.
A clamp suitable for turbine blade with variable natural frequency and adjustable angle comprises a clamp main body 1, a big bolt 2, a pressing block 3, a fixed support ring 4, a fixed support bolt 5 and a clamping device 6; the clamp main body 1 comprises a base and a frame consisting of three support columns standing on the base, a fixed support ring 4 is arranged among the three support columns, two support columns are in contact with two sides of the front of the fixed support ring 4, and the other support column is in contact with the middle of the rear of the fixed support ring 4; the tops of the three support columns are connected, a large threaded hole is formed in the connecting center, the large bolt 2 abuts against the pressing block 3 from top to bottom through the large threaded hole, the lower portion of the pressing block 3 abuts against the fastening support ring 4, and the lower portion of the fastening support ring is in contact with the base; the middle of the fixed support ring 4 is provided with a cavity which is through from front to back, a clamping device 6 used for clamping the blade is arranged in the cavity, and the clamping device 6 is fixed by a fixed support bolt 5.
The fixed support ring 4 is of a circular ring structure, and when the large bolt 2 moves upwards so that the pressing block 3 does not abut against the fixed support ring 4, the fixed support ring 4 can rotate in the clamp body 1.
The lower part of the pressing block 3 is provided with an arc surface matched with the fixed support ring 4, and the part of the upper part of the base contacted with the fixed support ring 4 is provided with an arc surface matched with the fixed support ring 4.
The ring surface of the fixed support ring 4 is provided with scales, and the position of the pillar corresponding to the scales of the fixed support ring 4 is also provided with scales.
The arc side surface of the fixed support ring 4 is provided with a small threaded hole communicated with the cavity, and the fixed support bolt 5 fixes the clamping device 6 from outside to inside through the small threaded hole; the small threaded hole is provided with a countersunk head structure, and the depth of the countersunk head is greater than the height of the top of the fixed bolt 5.
The three support columns are all provided with longitudinal round holes with openings at the tops, internal threads are arranged on the longitudinal round holes, and the three adjustable bolts 7 are connected with the three support columns through the longitudinal round holes.
The adjustable bolts 7 are a series of bolts with different lengths, and the depth of the longitudinal round hole is matched with the longest adjustable bolt 7; according to the required natural frequency, the adjustable bolts 7 with different lengths are selected to be screwed into the longitudinal round holes of the support.
The adjustable bolt device further comprises a washer 8, and the adjustable bolt 7 is connected with the support column through the washer 8.
The method for adjusting the natural frequency and the angle of the turbine blade uses the clamp which is suitable for the turbine blade and has variable natural frequency and adjustable angle, and after a fixed support ring is placed into the clamp body from the side surface of the clamp body, the clamping angle of the turbine blade is adjusted by rotating the fixed support ring; then clamping the blade by using a clamping device, fixing the clamping device by using a fixed support bolt, and fixing a fixed support ring by using a big bolt and a pressing block; finally, the natural frequency of the fixture is adjusted.
The method for adjusting the natural frequency of the clamp comprises the following steps: the natural frequency of the clamp is adjusted by using the adjustable bolts and the washers, and for each strut, the natural frequency of the clamp is adjusted by selecting a mode of not installing the adjustable bolts or installing the adjustable bolts with different lengths and selecting different numbers of washers.
Another embodiment of the present invention is described below with reference to the drawings.
The jig of the present invention is a jig for fixing an aircraft engine turbine blade, and has a natural frequency adjusting function and a clamping angle adjusting function, as shown in fig. 1 to 4.
The function of clamping angle adjustment is mainly realized by the fixed support ring 4, as shown in fig. 3, the fixed support ring 4 is a circular ring and is connected between the pressing block 3 and the clamp main body 1 from top to bottom in a cross sectional view, and when the pressing block 3 is loosened, the fixed support ring 4 can rotate along the circular arc surface given to the clamp main body 1, so that the clamping angle is adjusted. For accurate adjustment and clamping angle, corresponding scales can be arranged on the fixed support ring 4 and the pillar contacted with the fixed support ring, and the rotation angle of the fixed support ring is adjusted through the scales, so that the test accuracy is ensured.
The natural frequency adjustment function is realized through the adjustable bolts 7, the washers 8 and the longitudinal round holes, as shown in fig. 4, each support is the same, for example, one support is provided with the illustrated longitudinal round hole, the adjustable bolts 7 and the washers 8 are rotatably connected with the longitudinal round holes, the adjustable bolts 7 are a series of bolts with different lengths, and the natural frequency of the clamp can be changed by installing the adjustable bolts 7 with different lengths and adjusting the number of the washers 8, even without installing the adjustable bolts 7 and the washers 8.
Claims (10)
1. The clamp with the variable natural frequency and the adjustable angle suitable for the turbine blade is characterized by comprising a clamp main body (1), a large bolt (2), a pressing block (3), a fixed support ring (4), a fixed support bolt (5) and a clamping device (6); the clamp main body (1) comprises a base and a frame consisting of three support columns standing on the base, a fixed support ring (4) is arranged among the three support columns, two support columns are in contact with two sides of the front of the fixed support ring (4), and the other support column is in contact with the middle of the rear of the fixed support ring (4); the tops of the three support columns are connected, a large threaded hole is formed in the connecting center, the large bolt (2) abuts against the pressing block (3) from top to bottom through the large threaded hole, the lower portion of the pressing block (3) abuts against the fastening support ring (4), and the lower portion of the fastening support ring is in contact with the base; the middle of the fixed support ring (4) is provided with a cavity which is through from front to back, a clamping device (6) used for clamping the blade is arranged in the cavity, and the clamping device (6) is fixed by a fixed support bolt (5).
2. The clamp with the variable natural frequency and the adjustable angle for the turbine blade as claimed in claim 1, characterized in that the supporting ring (4) is a circular ring structure, and the supporting ring (4) can rotate in the clamp body (1) when the large bolt (2) moves upwards so that the pressing block (3) does not abut against the supporting ring (4).
3. The clamp with the variable natural frequency and the adjustable angle for the turbine blade as claimed in claim 2, wherein the lower part of the pressing block (3) is provided with an arc surface matched with the supporting ring (4), and the part above the base, which is contacted with the supporting ring (4), is provided with an arc surface matched with the supporting ring (4).
4. The clamp with the variable natural frequency and the adjustable angle suitable for the turbine blade as claimed in claim 2, wherein the ring surface of the fixed support ring (4) is provided with scales, and the position of the strut corresponding to the scales of the fixed support ring (4) is also provided with scales.
5. The clamp with the variable natural frequency and the adjustable angle suitable for the turbine blade as claimed in claim 1, wherein the arc side surface of the fixed support ring (4) is provided with a small threaded hole communicated with the cavity, and the fixed support bolt (5) fixes the clamping device (6) from outside to inside through the small threaded hole; the small threaded hole is provided with a countersunk head structure, and the depth of the countersunk head is greater than the height of the top of the fixed support bolt (5).
6. The fixture with variable natural frequency and adjustable angle for the turbine blades as claimed in claim 2, wherein the three supports are all provided with a top-opened longitudinal round hole, the longitudinal round hole is internally threaded, and the three adjustable bolts (7) are connected with the three supports through the longitudinal round holes.
7. The clamp with variable natural frequency and adjustable angle suitable for the turbine blade as claimed in claim 6, wherein the adjustable bolt (7) is a series of bolts with different lengths, and the depth of the longitudinal circular hole is matched with the longest adjustable bolt (7); according to the required natural frequency, adjustable bolts (7) with different lengths are selected to be screwed into the longitudinal round holes of the support.
8. The clamp suitable for the turbine blade with the variable natural frequency and the adjustable angle is characterized by further comprising a washer (8), wherein the adjustable bolt (7) is connected with the strut through the washer (8).
9. A method for adjusting the natural frequency and the angle of a turbine blade, which is characterized in that the fixture with variable natural frequency and adjustable angle for a turbine blade, which is disclosed by claim 8, is used, after a fixed support ring is placed into a fixture body from the side surface of the fixture body, the clamping angle of the turbine blade is adjusted by rotating the fixed support ring; then clamping the blade by using a clamping device, fixing the clamping device by using a fixed support bolt, and fixing a fixed support ring by using a big bolt and a pressing block; finally, the natural frequency of the fixture is adjusted.
10. The method for adjusting the natural frequency and the angle of the turbine blade as claimed in claim 9, wherein the method for adjusting the natural frequency of the fixture comprises: the natural frequency of the clamp is adjusted by using the adjustable bolts and the washers, and for each strut, the natural frequency of the clamp is adjusted by selecting a mode of not installing the adjustable bolts or installing the adjustable bolts with different lengths and selecting different numbers of washers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011461409.5A CN112665809A (en) | 2020-12-11 | 2020-12-11 | Fixture and method suitable for variable natural frequency and adjustable angle of turbine blade |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011461409.5A CN112665809A (en) | 2020-12-11 | 2020-12-11 | Fixture and method suitable for variable natural frequency and adjustable angle of turbine blade |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112665809A true CN112665809A (en) | 2021-04-16 |
Family
ID=75405259
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011461409.5A Pending CN112665809A (en) | 2020-12-11 | 2020-12-11 | Fixture and method suitable for variable natural frequency and adjustable angle of turbine blade |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112665809A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003270081A (en) * | 2002-03-19 | 2003-09-25 | Ishikawajima Harima Heavy Ind Co Ltd | Support structure of turbine moving blade |
| EP3205451A1 (en) * | 2016-02-12 | 2017-08-16 | Siemens Aktiengesellschaft | Turbine blade torsional clamp |
| CN108444720A (en) * | 2018-05-29 | 2018-08-24 | 北京航空航天大学 | A kind of height week composite fatigue test fixture of turbine vanelets mortise structure |
| CN108918070A (en) * | 2018-08-28 | 2018-11-30 | 苏州长菱测试技术有限公司 | A kind of vibration fatigue test device for high frequency stress blade |
| CN109029889A (en) * | 2018-08-27 | 2018-12-18 | 烟台大学 | A kind of the vibration-testing experimental rig and its test method of blade of aviation engine |
| CN211347301U (en) * | 2020-03-13 | 2020-08-25 | 中国航发商用航空发动机有限责任公司 | Fatigue test clamp for compressor blade |
| CN212007721U (en) * | 2020-06-10 | 2020-11-24 | 中国航发商用航空发动机有限责任公司 | Fatigue test vibration anchor clamps |
-
2020
- 2020-12-11 CN CN202011461409.5A patent/CN112665809A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003270081A (en) * | 2002-03-19 | 2003-09-25 | Ishikawajima Harima Heavy Ind Co Ltd | Support structure of turbine moving blade |
| EP3205451A1 (en) * | 2016-02-12 | 2017-08-16 | Siemens Aktiengesellschaft | Turbine blade torsional clamp |
| CN108444720A (en) * | 2018-05-29 | 2018-08-24 | 北京航空航天大学 | A kind of height week composite fatigue test fixture of turbine vanelets mortise structure |
| CN109029889A (en) * | 2018-08-27 | 2018-12-18 | 烟台大学 | A kind of the vibration-testing experimental rig and its test method of blade of aviation engine |
| CN108918070A (en) * | 2018-08-28 | 2018-11-30 | 苏州长菱测试技术有限公司 | A kind of vibration fatigue test device for high frequency stress blade |
| CN211347301U (en) * | 2020-03-13 | 2020-08-25 | 中国航发商用航空发动机有限责任公司 | Fatigue test clamp for compressor blade |
| CN212007721U (en) * | 2020-06-10 | 2020-11-24 | 中国航发商用航空发动机有限责任公司 | Fatigue test vibration anchor clamps |
Non-Patent Citations (1)
| Title |
|---|
| 唐德效 等: "一种通用振动夹具的设计", 空间电子技术 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110497217B (en) | Synchronous telescopic self-adaptive multi-point supporting clamp for processing annular thin-walled part | |
| CN112665809A (en) | Fixture and method suitable for variable natural frequency and adjustable angle of turbine blade | |
| KR20090080639A (en) | Jig for engine overhaul | |
| CN114633011B (en) | Clamp device for electron beam welding blind welding and alignment method | |
| CN113756875B (en) | Aircraft engine core engine whole motor balance assembly method | |
| CN209102055U (en) | Spray finishing jig correcting tool | |
| CN210360224U (en) | Pump installation aligning device | |
| CN219455437U (en) | Special fixture for testing high-temperature vibration fatigue performance of engine blade | |
| CN113478257A (en) | Clamp for processing piston pin hole and bolt hole | |
| CN110695896B (en) | Aeroengine converging ring assembling and supporting clamp and assembling process thereof | |
| CN209559406U (en) | A kind of dynamic balancing detecting tool of crankshaft torsion vibration absorber | |
| CN110823486A (en) | Large-batch full-axial rapid reversing impact vibration test process device for small-sized parts | |
| CN216938553U (en) | Intelligent speed-changing three-phase asynchronous motor base positioning tool | |
| RU2189894C1 (en) | Device for locking blades of turbo-machine in repair | |
| CN211727637U (en) | Air compressor machine driving disk milling fixture | |
| CN209510321U (en) | Walking machine support top mechanism and supporting mechanism | |
| CN217453746U (en) | Device for press fitting of connecting pipe | |
| CN211162508U (en) | Automobile manufacturing is with welding anchor clamps that have automatically cooling structure | |
| CN213858911U (en) | Processing jig for lower shell of elevator motor | |
| CN218658938U (en) | Adjustable roller bracket | |
| CN215659837U (en) | Two-stroke engine crankshaft inspection fixing tool | |
| CN219302141U (en) | Material pulling force detection device | |
| CN117169342B (en) | A fixed frock for blisk blade root ultrasonic detection | |
| CN219617720U (en) | Automobile hub die assembly workbench | |
| CN112097995B (en) | Balance adjusting device and method for turbofan engine rotor single-stage disc |
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 | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210416 |