CN112284701B - Switching structure for engine wheel disc rotation test - Google Patents
Switching structure for engine wheel disc rotation test Download PDFInfo
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- CN112284701B CN112284701B CN202011108246.2A CN202011108246A CN112284701B CN 112284701 B CN112284701 B CN 112284701B CN 202011108246 A CN202011108246 A CN 202011108246A CN 112284701 B CN112284701 B CN 112284701B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
- G01M15/02—Details or accessories of testing apparatus
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The application relates to an engine wheel dish is switching structure for rotation test, engine wheel dish is switching structure for rotation test includes switching sleeve 1, switching dish 2, D head bolt 3, self-locking nut 4, switching section 5, pin 6, balance screw 7 and locking plate 8, wherein: the adapter sleeve 1 is of an inverted Z-shaped structure, a first through hole is formed in a first installation edge, matched with the adapter plate 2, of the adapter sleeve 1, a bolt hole is formed in the upper end of the adapter plate 2, and a stop boss structure K is arranged on the lower edge of the first through hole; the D-head bolt 3 penetrates through the first through hole of the adapter sleeve 1 and the bolt hole of the adapter plate 2, and the adapter sleeve 1 is connected with the adapter plate 2 through the self-locking nut 4; a second through hole is formed in a second mounting edge, matched with the test disc, of the adapter sleeve 1; the adapter plate 2 is connected with the adapter section 5 through a pin 6, and the pin 6 is used for circumferential and axial centering of the adapter plate 2 and the adapter section 5.
Description
Technical Field
The invention belongs to the technical field of aero-engines, and particularly relates to a switching structure for an engine wheel disc rotation test.
Background
The wheel disc is a key part in an aeroengine, and the wheel disc is ensured to be rarely failed during the working period; at present, the research and development departments of domestic and foreign aeroengines usually carry out a large number of rotary tests of the wheel disc on a rotary tester so as to verify the structural integrity of the wheel disc and obtain the low-cycle fatigue life of the wheel disc. A rotary test of the wheel disc is carried out on the tester, and a switching structure is required to be designed to connect the tester and the wheel disc.
The prior wheel disc connecting structure adopts an engine drum form and is structured as shown in figure 1. The adapter disc and the adapter drum barrel are radially positioned through the seam allowance; the switching disk and the switching section are in interference fit and are connected through a pin; the switching section is connected with the equipment shaft through a bolt and a locking plate and is radially positioned through a spigot; the adapter drum is connected with the test disc through bolts. The main problems of the existing switching structure are as follows:
(1) The conventional transfer drum barrel is high in turning radius and stress level, and large plastic deformation occurs after an over-rotation test, so that risks are brought to use;
(2) When the existing adapter drum is assembled with a test disc, because the D-head bolt belongs to blind assembly, the adapter drum is pulled due to the rotation of the D-head caused by human factors;
(3) After materials are selected, the conventional transfer drum structure has limited simulation on boundary conditions of a test disc, so that the application range of the transfer drum structure is limited;
(4) The low cycle fatigue life of the existing adapter drum barrel and the adapter plate is not high, and the existing adapter drum barrel and the existing adapter plate can not be effectively applied to the low cycle fatigue test of the wheel disc.
Disclosure of Invention
The invention provides a switching structure for an engine wheel disc rotation test, which aims at overcoming the defects of the existing switching drum barrel, solves the problems of deformation, fatigue and disassembly of a switching section and provides a switching structure for the engine wheel disc rotation test.
The application relates to an engine wheel dish is switching structure for rotation test, engine wheel dish is switching structure for rotation test includes switching sleeve 1, switching dish 2, D head bolt 3, self-locking nut 4, switching section 5, pin 6, balance screw 7 and locking plate 8, wherein:
the adapter sleeve 1 is of an inverted Z-shaped structure, a first through hole is formed in a first installation edge, matched with the adapter plate 2, of the adapter sleeve 1, a bolt hole is formed in the upper end of the adapter plate 2, and a stop boss structure K is arranged on the lower edge of the first through hole; the D-head bolt 3 penetrates through the first through hole of the adapter sleeve 1 and the bolt hole of the adapter plate 2, and the adapter sleeve 1 is connected with the adapter plate 2 through the self-locking nut 4; a second through hole is formed in a second mounting edge, matched with the test disc, of the adapter sleeve 1; the adapter plate 2 is connected with the adapter section 5 through a pin 6, and the pin 6 is used for circumferential and axial centering of the adapter plate 2 and the adapter section 5; the outer edge part of the upper end of the bolt hole of the adapter plate 2 is provided with a threaded hole, a balance screw 7 penetrates through a locking plate 8 and is installed in the threaded hole, and the lower end of the locking plate 8 is bent towards the adapter plate 2; n jackscrew holes are arranged in the preset radius range of the threaded hole of the adapter plate 2.
Specifically, the first mounting edge of the adapter sleeve 1 is connected with the adapter plate 2 in a manner of interference fit in the radial direction.
Specifically, the axial length L of the second mounting edge of the adapter sleeve 1 connected with the test disc and the first mounting edge of the adapter sleeve 1 is not less than the axial length of the D-head bolt 3.
In particular, the diameter of the first mounting edge of the adapter sleeve 1
The diameter of the outer end face of the second mounting edge which is smaller than the diameter of the outer end face of the second mounting edge which is connected with the test disc and is connected with the adapter sleeve 1
And 4 times of the diameter of the second through hole of the adapter sleeve 1
The difference between them.
Specifically, the switching section 5 is connected with the switching disk 2 in a manner of interference fit in the radial direction.
Specifically, the adapter 5 is connected with the equipment shaft 10 through a long bolt 9 and is radially positioned through the spigot C.
Specifically, when the test piece is disassembled, the adapter plate 2 and the adapter sleeve 1 are disassembled by means of jackscrews, and the adapter plate 2, the adapter section 5 and the pin 6 are not disassembled.
Specifically, the radial and axial rigidity of the adapter sleeve 1 is changed by adjusting the taper of the adapter sleeve 1.
The invention provides a switching structure for an engine wheel disc rotation test, which has the main technical effects that:
(1) The gravity center size of the adapter sleeve and the matching reference size of the adapter plate are reduced through structural optimization, the stress states of the adapter sleeve and the adapter plate are improved, the burst rotating speed storage and the low-cycle fatigue life of the adapter sleeve are improved, and the smooth completion of a test can be ensured;
(2) By optimally designing the structure of the adapter sleeve, the visualization is realized when the bolt is assembled between the test disc and the adapter sleeve, the on-site assembly and disassembly are convenient, and the pull injury of a test piece caused by the rotation of the D head due to human factors can be effectively prevented;
(3) The radial rigidity of the switching structure is adjusted by designing the taper and the size of the switching sleeve, so that the radial deformation of the switching structure is controlled, the reliable positioning of the matching seam allowance of the switching sleeve and the test disc in the test process is ensured, the stress state of the test disc in an engine state is simulated, and the application range of the switching structure is widened;
(4) A locking structure is designed on the mounting edge of the adapter sleeve, so that the D-head bolt can be prevented from rotating, and the bolt assembly is facilitated;
(5) A balance screw is designed at the position of the adapter plate, so that the balance of the test piece machine is facilitated;
(6) The switching structure provided by the invention is convenient to assemble, reliable in centering and reasonable in stress, and can meet the requirements of rotary tests of aeroengines and gas turbine wheel discs.
Drawings
FIG. 1 is a schematic view of a conventional wheel adapter structure;
FIG. 2 is a schematic view of a wheel disc adapter structure according to the present invention;
FIG. 3 is a schematic structural view of a wheel disc test piece connected by the adapter structure of the present invention;
wherein: 1-an adapter sleeve; 2, a switching disc; a 3-D head bolt; 4-self-locking nut; 5, switching section; 6-pin; 7-a balance screw; 8-locking plate; 9-long bolt; 10-a device shaft; 11-D head bolt; 12-a counterweight block; 13-self-locking nut; 14-test disk.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings:
referring to fig. 3, the wheel disc test piece structure of the present embodiment is composed of a test disc 14, a switching structure, a balancing weight 12, and an apparatus shaft 10. The switching structure (refer to fig. 2) is composed of a switching sleeve 1, a switching disc 2, a D-head bolt 3, a self-locking nut 4, a switching section 5, a pin 6, a balance screw 7 and a locking plate 8.
When the wheel disc is subjected to a rotation test, the switching structure is connected with an equipment shaft 10 by adopting a long bolt 9 and is radially positioned through a spigot C (refer to fig. 2); the switching structure is connected with the test disc 14 and the balancing weight 12 through a D-head bolt 11 and a self-locking nut 13 and is radially positioned through a spigot D.
When the switching structure is designed, the radial and axial rigidity of the switching structure is adjusted by optimizing the axial dimension L (refer to fig. 2) of the switching sleeve 1, the dimension phi A (refer to fig. 2) of the outer end face of the mounting edge and the taper of the switching sleeve, so that the radial deformation of the switching structure is controlled, on one hand, no gap is generated between the switching sleeve 1 and a matching spigot D (refer to fig. 3) of a test disc 14 under test conditions, and the positioning reliability is ensured; on the other hand, the stress state at the mounting edge of the adapter structure and the test tray 14 can be adjusted to simulate the boundary conditions of the test tray in the engine state.
By optimizing the size phi A of the outer end face of the mounting edge of the adapter sleeve 1 and the taper of the adapter sleeve, the size of the center of gravity of the adapter sleeve 1 and the size of the matching reference of the adapter sleeve 2 are reduced, the stress state of the adapter sleeve 1 and the adapter plate 2 can be effectively improved, the storage of the rupture rotating speed and the low cycle fatigue life of the adapter sleeve are improved, and the smooth completion of the test is ensured.
The designed adapter plate 2 and the adapter section 5 are connected in an interference fit manner; the pin 6, the adapter plate 2 and the adapter section 5 adopt a transition fit form; and the torque is transmitted through the friction of the pin and the end surface of the matching spigot B. During processing, the switching disc 2 (without processing pin holes), the switching section 5 (without processing pin holes) and the pins 6 are respectively processed; then, the adapter plate 2 and the adapter section 5 are assembled, and the pin 6 is assembled after the combination and the punching.
When a wheel disc test piece is assembled, firstly, a switching sleeve 1 is assembled after a switching disc 2 is heated, and a D-head bolt 3-level self-locking nut 4 is installed; then, the test tray 14 is heated and then connected with the switching structure; finally, the equipment shaft 10 is installed; and after the assembly is finished, mounting a balance screw 7 and a locking plate 8 according to the requirement of the unbalance amount of the wheel disc test piece.
When the wheel disc test piece is decomposed, firstly, the equipment shaft 10 is decomposed, then, the test disc 14 and the balancing weight 12 are decomposed, and finally, the adapter disc 2 and the adapter sleeve 1 are decomposed by means of jackscrews; the adapter plate 2, the adapter section 5 and the pins are not disassembled.
Claims (5)
1. The utility model provides an engine wheel dish is switching structure for rotation test, its characterized in that, engine wheel dish is switching structure for rotation test includes switching sleeve (1), switching dish (2), D head bolt (3), self-locking nut (4), switching section (5), pin (6), balance screw (7) and locking plate (8), wherein:
the adapter sleeve (1) is of an inverted Z-shaped structure, a first through hole is formed in a first mounting edge, matched with the adapter plate (2), of the adapter sleeve (1), a bolt hole is formed in the upper end of the adapter plate (2), and a stop boss structure K is arranged on the lower edge of the first through hole; the D-head bolt (3) penetrates through a first through hole of the adapter sleeve (1) and a bolt hole of the adapter plate (2), and the adapter sleeve (1) is connected with the adapter plate (2) through the self-locking nut (4); a second through hole is formed in a second mounting edge, matched with the test disc, of the adapter sleeve (1); the adapter plate (2) is connected with the adapter section (5) through a pin (6), and the pin (6) is used for circumferential and axial centering of the adapter plate (2) and the adapter section (5); the outer edge part of the upper end of a bolt hole of the adapter plate (2) is provided with a threaded hole, a balance screw (7) penetrates through a locking plate (8) and is installed in the threaded hole, and the lower end of the locking plate (8) is bent towards the direction of the adapter plate (2); n jackscrew holes are arranged in the preset radius range of the threaded hole of the adapter plate (2);
the axial length L of a second mounting edge of the adapter sleeve (1) connected with the test disc and a first mounting edge of the adapter sleeve (1) is not less than that of the D-head bolt (3);
diameter of the first mounting edge of the adapter sleeve (1)
The diameter of the outer end face of the second mounting edge which is connected with the test disc and needs to be smaller than that of the adapter sleeve (1)
And 4 times of the diameter of the second through hole of the adapter sleeve (1)
The difference between the two;
and changing the radial rigidity and the axial rigidity of the adapter sleeve (1) according to the adjustment of the taper of the adapter sleeve (1).
2. The adapting structure for the engine disk rotation test of claim 1, wherein the first mounting edge of the adapting sleeve (1) and the adapting disk (2) are connected in an interference fit manner in the radial direction.
3. An adapter structure for an engine disk rotation test according to claim 1, wherein the adapter section (5) is connected with the adapter plate (2) in a radial interference fit manner.
4. An adapter structure for an engine disk rotation test according to claim 1, wherein the adapter section (5) is connected with the equipment shaft (10) through a long bolt (9) and is radially positioned through a spigot C.
5. The adapter structure for the engine disk rotation test according to claim 1, wherein the adapter plate (2) and the adapter sleeve (1) are disassembled by means of a jackscrew when the test piece is disassembled, and the adapter plate (2), the adapter section (5) and the pin (6) are not disassembled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011108246.2A CN112284701B (en) | 2020-10-16 | 2020-10-16 | Switching structure for engine wheel disc rotation test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011108246.2A CN112284701B (en) | 2020-10-16 | 2020-10-16 | Switching structure for engine wheel disc rotation test |
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| Publication Number | Publication Date |
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| CN112284701A CN112284701A (en) | 2021-01-29 |
| CN112284701B true CN112284701B (en) | 2022-11-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011108246.2A Active CN112284701B (en) | 2020-10-16 | 2020-10-16 | Switching structure for engine wheel disc rotation test |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113984317B (en) * | 2021-10-26 | 2023-12-15 | 中国航发沈阳发动机研究所 | Bidirectional rotating blade disc excitation test device and system |
| CN114235425A (en) * | 2021-12-13 | 2022-03-25 | 中国船舶重工集团公司第七0三研究所 | High-temperature rotation test device for hollow turbine disc of gas turbine |
| CN114961866A (en) * | 2022-05-06 | 2022-08-30 | 中国船舶重工集团公司第七0三研究所 | Anti-drop self-locking high-temperature disc shaft connecting structure |
| CN115203765B (en) * | 2022-07-29 | 2023-07-07 | 中国航发沈阳发动机研究所 | Design method of balancing weight for low-cycle fatigue test of aero-engine rotor |
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