Stator vane fatigue test fixture and fatigue test equipment

Abstract

The present invention belongs to the technical field of jigs, and discloses a stator blade fatigue test jig and a fatigue test device. The stator blade fatigue test jig includes a first jig body and a second jig body. A cavity is provided on the first jig body, and a first pressing block is placed in the cavity. A tenon groove that matches the first end of the stator blade is provided on the first pressing block, and the first end of the stator blade is limited in the tenon groove. A second pressing block is provided on the side wall of the second jig body facing the first jig body. A through hole is provided on the second pressing block, and a protective sleeve is provided in the through hole. The protective sleeve is sleeved on the second end of the stator blade. A deformation groove is provided on the protective sleeve, and the deformation groove is used to compensate for the difference in the diameter of the second end of the stator blade. A tightening assembly can fix the second end of the stator blade on the second jig body. The stator blade fatigue test jig can effectively clamp both ends of the stator blade, avoid the generation of invalid parts caused by cracks appearing at the clamping position, and has a simple structure and low cost.

Description

Technical Field

[0001] The present invention relates to the technical field of jigs, and particularly to a stator blade fatigue test jig and a fatigue test device. Background Art

[0002] As an important component of an engine, a stator blade can adjust its angle to change the airflow direction for the next-stage rotor blade, thereby ensuring the performance of the engine. In traditional blade fatigue tests, the outer ring side (the large end) of the stator blade is generally clamped for fatigue tests. This test method has the advantages of low frequency, being conducive to exciting vibration, and simple installation for the blade. However, it is different from the actual installation situation and also leads to different stress distribution conditions on the blade body. When clamping both ends of the blade simultaneously, there will be clamping prestress caused by manufacturing errors (height errors in clamping both ends), resulting in cracks appearing at the clamping position and generating invalid parts.

[0003] Therefore, there is an urgent need for a stator blade fatigue test jig and a fatigue test device to solve the problems in the prior art. Summary of the Invention

[0004] The purpose of the present invention is to provide a stator blade fatigue test jig, which can avoid the generation of invalid parts caused by cracks appearing at the clamping position, and has a simple structure and low cost.

[0005] To achieve this purpose, the present invention adopts the following technical solutions:

[0006] A stator blade fatigue test jig, comprising:

[0007] A chassis;

[0008] A first jig body, arranged on the chassis, a cavity is arranged on the first jig body, a first pressing block is placed in the cavity, a tenon groove that matches the first end of the stator blade is arranged on the first pressing block, and the first end of the stator blade is limited in the tenon groove;

[0009] A second jig body, arranged on the chassis opposite to the first jig body, a second pressing block is arranged on the side wall of the second jig body opposite to the first jig body, a through hole is arranged on the second pressing block, a protective sleeve is arranged in the through hole, a deformation groove is arranged on the protective sleeve, a first cylinder and a second cylinder are arranged coaxially at the second end of the stator blade, the protective sleeve is sleeved on the second cylinder, the inner diameter of the protective sleeve is equal to the diameter of the second cylinder, the outer diameter of the protective sleeve is equal to the diameter of the first cylinder, and the deformation groove on the protective sleeve is configured to compensate for the difference in the diameter of the first cylinder;

[0010] A tightening assembly, connected to the second jig body, and the tightening assembly is configured to fix the second end of the stator blade on the second jig body.

[0011] Optionally, the first end of the stator vane includes a third cylinder and a fourth cylinder arranged coaxially. A clamping platform is provided at one end of the fourth cylinder away from the third cylinder. The first pressing block includes two symmetrically arranged first sub-blocks. Each first sub-block includes a first arc groove, a second arc groove, and a limiting boss. The two symmetrically arranged first arc grooves, the two symmetrically arranged second arc grooves, and the two symmetrically arranged limiting bosses jointly enclose to form the tenon groove. The inner wall of the first arc groove fits on the outer wall of the third cylinder, the inner wall of the second arc groove fits on the outer wall of the fourth cylinder, and the limiting boss abuts against the clamping platform.

[0012] Optionally, the first fixture includes a first tightening screw. The first tightening screw penetrates through the first fixture and is threadedly connected to the first fixture. The first tightening screw is configured to fix the first pressing block to the first fixture.

[0013] Optionally, the second pressing block includes a second sub-body and a third sub-body. The second sub-body is connected to the second fixture, and the third sub-body is connected to the second sub-body. A first clamping groove is provided on the second sub-body, and a second clamping groove is provided on the third sub-body. The first clamping groove and the second clamping groove jointly enclose to form the through hole, and the protective sleeve is limited in the through hole.

[0014] Optionally, two waist-shaped holes are provided on the second sub-body in the vertical direction. A fastening bolt is respectively inserted into each of the two waist-shaped holes, and each fastening bolt is threadedly connected to the second fixture.

[0015] Optionally, a light hole is provided on the third sub-body, and a threaded hole is provided on the end face of the second sub-body facing the third sub-body. A locking bolt penetrates through the light hole and extends into the threaded hole to be threadedly connected to the second sub-body.

[0016] Optionally, the tightening assembly includes a top block and a second tightening screw. The second tightening screw penetrates through the second fixture and is threadedly connected to the second fixture. A receiving cavity is provided on the second fixture, and the top block is provided in the receiving cavity. One end of the top block abuts against the protective sleeve, and the other end of the top block abuts against the second tightening screw.

[0017] Optionally, a plurality of first fixing holes are provided on the first fixture, and a plurality of second fixing holes are provided on the second fixture. A first fixing bolt is inserted into each first fixing hole, and the first fixing bolt is tightly connected to the chassis. A second fixing bolt is inserted into each second fixing hole, and each second fixing bolt is tightly connected to the chassis.

[0018] Optionally, an avoidance groove is provided on the second pressing block, and the avoidance groove is configured to avoid the second end of the stator blade.

[0019] Another object of the present invention is to provide a fatigue test fixture, which can avoid the generation of invalid parts caused by cracks appearing in the clamping part during the test, and reduce the product loss during the test.

[0020] To achieve this purpose, the present invention adopts the following technical solutions:

[0021] A fatigue test device, including the above-mentioned stator blade fatigue test fixture.

[0022] Beneficial effects:

[0023] The present invention provides a stator blade fatigue test fixture, including a first clamping body, a second clamping body and a tightening assembly. A cavity is provided on the first clamping body, and a first pressing block is placed in the cavity. A tenon groove matching the first end of the stator blade is provided on the first pressing block, and the first end of the stator blade is limited in the tenon groove. A second pressing block is provided on the side wall of the second clamping body facing the first clamping body. A through hole is provided on the second pressing block, and a protective sleeve is provided in the through hole. The protective sleeve is sleeved on the second end of the stator blade. A deformation groove is provided on the protective sleeve, and the deformation groove is used to compensate for the difference in the diameter of the second end of the stator blade. The tightening assembly is connected to the second clamping body, and the tightening assembly can fix the second end of the stator blade on the second clamping body. The stator blade fatigue test fixture can effectively clamp both ends of the stator blade, avoid the generation of invalid parts caused by cracks appearing in the clamping part, and has a simple structure and low cost. Description of the Drawings

[0024] Figure 1 is a cross-sectional view of the stator blade fatigue test fixture provided by the present invention;

[0025] Figure 2 is a structural schematic diagram of the stator blade fatigue test fixture provided by the present invention;

[0026] Figure 3 is a structural schematic diagram of the stator blade provided by the present invention;

[0027] Figure 4 is an exploded view of the first clamping body provided by the present invention;

[0028] Figure 5 is an exploded view of the second clamping body provided by the present invention.

[0029] In the figure: 1000, stator blade; 1100, first cylinder; 1200, second cylinder; 1300, third cylinder; 1400, fourth cylinder; 1500, clamping platform;

[0030] 100. Chassis; 110. First fixing hole;

[0031] 200. First clamping body; 210. Cavity; 220. First pressing block; 221. First sub-block; 2211. First arc groove; 2212. Second arc groove; 2213. Limit boss; 230. Mortise groove; 240. First tightening screw; 250. First mounting hole;

[0032] 300. Second clamping body; 310. Second pressing block; 311. Second sub-block; 3111. First clamping groove; 3112. Waist-shaped hole; 312. Third sub-block; 3121. Second clamping groove; 3122. Light hole; 320. Through hole; 330. Protective sleeve; 331. Deformation groove; 340. Accommodating cavity; 350. Second mounting hole;

[0033] 400. Tightening assembly; 410. Tightening block; 420. Second tightening screw. Detailed implementation mode

[0034] The present invention will be further described in detail below with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present invention, rather than limiting the present invention. In addition, it should be noted that for the convenience of description, only parts related to the present invention rather than all structures are shown in the drawings.

[0035] In the description of the present invention, unless otherwise clearly defined and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0036] In the present invention, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features between them. Moreover, the first feature being "above", "above", and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely means that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "below", and "under" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely means that the horizontal height of the first feature is lower than that of the second feature.

[0037] In the description of this embodiment, the orientation or positional relationships such as "upper", "lower", "left", "right", etc. are based on the orientation or positional relationships shown in the drawings. They are only for the convenience of description and simplifying the operations, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention. In addition, the terms "first" and "second" are only used for distinction in description and have no special meanings.

[0038] This embodiment provides a stator blade fatigue test fixture. As Figures 1 - 5 shown, the stator blade fatigue test fixture includes a chassis 100, a first fixture body 200, a second fixture body 300, and a tightening assembly 400. The first fixture body 200 is disposed on the chassis 100. A cavity 210 is provided on the first fixture body 200. A first pressing block 220 is placed in the cavity 210. A mortise groove 230 that matches the first end of the stator blade 1000 is provided on the first pressing block 220. The first end of the stator blade 1000 is limited within the mortise groove 230. The second fixture body 300 is disposed on the chassis 100 opposite to the first fixture body 200. A second pressing block 310 is provided on the side wall of the second fixture body 300 opposite to the first fixture body 200. A through hole 320 is provided on the second pressing block 310. A protective sleeve 330 is provided in the through hole 320. A deformation groove 331 is provided on the protective sleeve 330. A coaxial first cylinder 1100 and a second cylinder 1200 are provided at the second end of the stator blade 1000. The protective sleeve 330 is sleeved on the second cylinder 1200. The inner diameter of the protective sleeve 330 is equal to the diameter of the second cylinder 1200. The outer diameter of the protective sleeve 330 is equal to the diameter of the first cylinder 1100. The length of the protective sleeve 330 is greater than the diameter of the second cylinder 1200. The deformation groove 331 on the protective sleeve 330 can compensate for the manufacturing error of the diameter of the first cylinder 1100 or the height error of the clamping at both ends of the stator blade 1000. The tightening assembly 400 is connected to the second fixture body 300. The tightening assembly 400 provides a lateral tightening force to the mirror leaf, so as to fix the second end of the stator blade 1000 to the second fixture body 300. This stator blade fatigue test fixture can effectively clamp both ends of the stator blade 1000, avoid the generation of invalid parts caused by cracks appearing at the clamping positions, and has a simple structure and low cost.

[0039] Optionally, the first end of the stator vane 1000 includes a coaxial third cylinder 1300 and a fourth cylinder 1400. A clamping platform 1500 is provided at one end of the fourth cylinder 1400 away from the third cylinder 1300. The first pressing block 220 includes two symmetrically arranged first sub-blocks 221. Each first sub-block 221 includes a first arc groove 2211, a second arc groove 2212, and a limiting boss 2213. The two symmetrically arranged first arc grooves 2211, the two symmetrically arranged second arc grooves 2212, and the two symmetrically arranged limiting bosses 2213 together enclose a mortise groove 230. The inner wall of the first arc groove 2211 is attached to the outer wall of the third cylinder 1300, the inner wall of the second arc groove 2212 is attached to the outer wall of the fourth cylinder 1400, and the limiting boss 2213 abuts against the clamping platform 1500, thereby fixing the first end of the stator vane 1000.

[0040] Further, as shown in Figure 2 , Figure 3 and Figure 4 , the first clamping body 200 includes a first tightening screw 240. The first tightening screw 240 passes through the first clamping body 200 and is threadedly connected to the first clamping body 200. The lower end of the first tightening screw 240 extends into the cavity 210 and abuts against the first pressing block 220, thereby fixing the first pressing block 220 to the first clamping body 200.

[0041] Optionally, the second pressing block 310 includes a second sub-block 311 and a third sub-block 312. The second sub-block 311 is connected to the second clamping body 300, and the third sub-block 312 is connected to the second sub-block 311. A first clamping groove 3111 is provided on the second sub-block 311, and a second clamping groove 3121 is provided on the third sub-block 312. The first clamping groove 3111 and the second clamping groove 3121 together enclose a through hole 320, and the protective sleeve 330 is limited in the through hole 320.

[0042] Optionally, as shown in Figure 5 , two waist-shaped holes 3112 are provided on the second sub-block 311 in the vertical direction. A fastening bolt is respectively passed through each of the two waist-shaped holes 3112, and each fastening bolt is threadedly connected to the second clamping body 300. By providing the waist-shaped holes 3112, the installation distance of the second end of the stator vane 1000 in the radial direction on the second clamping body 300 can be adjusted, so as to ensure that the installation heights of both ends of the stator vane 1000 are the same, and reduce the clamping prestress received by the stator vane 1000.

[0043] Optionally, a light hole 3122 is provided on the third sub-block 312, and a threaded hole is provided on the end face of the second sub-block 311 facing the third sub-block 312. The locking bolt passes through the light hole 3122 and extends into the threaded hole to be threadedly connected to the second sub-block 311, thereby fixing the third sub-block 312 to the second sub-block 311.

[0044] Preferably, as Figure 5 shown, the pressing component 400 includes a pressing block 410 and a second pressing screw 420. The second pressing screw 420 passes through the second fixture body 300 and is threadedly connected to the second fixture body 300. A receiving cavity 340 is provided on the second fixture body 300. A pressing block 410 is provided in the receiving cavity 340. One end of the pressing block 410 abuts against the protective sleeve 330, and the other end of the pressing block 410 abuts against the second pressing screw 420. The pressing block 410 is arranged between the second pressing screw 420 and the second end of the stator blade 1000, which can protect the stator blade 1000 from being damaged by extrusion at the second end.

[0045] Optionally, a plurality of first fixing holes 110 are provided on the first fixture body 200, and a plurality of second fixing holes are provided on the second fixture body 300. A first fixing bolt is inserted into each first fixing hole 110, and the first fixing bolt is fixedly connected to the chassis 100, which can ensure the firm connection between the first fixture body 200 and the chassis 100 and improve the accuracy of the test results. A second fixing bolt is inserted into each second fixing hole, and each second fixing bolt is fixedly connected to the chassis 100 to ensure the firm connection between the second fixture body 300 and the chassis 100 and improve the accuracy of the test results.

[0046] Optionally, an avoidance groove is provided on the second pressing block 310 for avoiding the tip of the second end of the stator blade 1000, so as to avoid interference between the stator blade 1000 and the second fixture body 300 and improve the convenience of the clamping process.

[0047] Specifically, the assembly steps of the fatigue test fixture for the stator blade 1000 provided by the present invention are as follows:

[0048] Fix the first fixture body 200 and the second fixture body 300 on the chassis 100 through the first fixing bolts and the second fixing bolts respectively. Place the first end of the stator blade 1000 into the tenon groove 230 of the first pressing block 220, then place the first pressing block 220 in the cavity 210 of the first fixture body 200, and tighten the first pressing block 220 through the first pressing screw 240.

[0049] Put the protective sleeve 330 on the second end of the stator blade 1000 and place it in the through hole 320 of the second pressing block 310. Then fix the second pressing block 310 on the second fixture body 300 and tighten the second end of the stator blade 1000 through the second pressing screw 420. With this fixture, both ends of the stator blade 1000 can be clamped and constrained simultaneously, and the generation of invalid parts caused by cracks at the clamping position can be avoided.

[0050] This embodiment also provides a fatigue test device, including the above-mentioned stator blade fatigue test fixture. This fatigue test device can avoid the generation of invalid parts caused by cracks appearing in the clamping part during the test, reducing product loss during the test.

[0051] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, rather than limitations on the implementation manners of the present invention. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the claims of the present invention.

Claims

1. A stator vane fatigue test fixture, characterized in that, Including: A chassis (100); A first clamping body (200) is arranged on the chassis (100). A cavity (210) is arranged on the first clamping body (200). A first pressing block (220) is placed in the cavity (210). A tenon groove (230) matching the first end of the stator blade (1000) is arranged on the first pressing block (220). The first end of the stator blade (1000) is limited in the tenon groove (230); A second clamping body (300) is arranged on the chassis (100) opposite to the first clamping body (200). A second pressing block (310) is arranged on the side wall of the second clamping body (300) opposite to the first clamping body (200). A through hole (320) is arranged on the second pressing block (310). A protective sleeve (330) is arranged in the through hole (320). A deformation groove (331) is arranged on the protective sleeve (330). A first cylinder (1100) and a second cylinder (1200) are coaxially arranged at the second end of the stator blade (1000). The protective sleeve (330) is sleeved on the second cylinder (1200). The inner diameter of the protective sleeve (330) is equal to the diameter of the second cylinder (1200). The outer diameter of the protective sleeve (330) is equal to the diameter of the first cylinder (1100). The deformation groove (331) on the protective sleeve (330) is configured to compensate for the diameter difference of the first cylinder (1100); A tightening assembly (400) is connected to the second clamping body (300). The tightening assembly (400) is configured to fix the second end of the stator blade (1000) on the second clamping body (300); The first end of the stator blade (1000) includes a third cylinder (1300) and a fourth cylinder (1400) arranged coaxially. A clamping platform (1500) is arranged at the end of the fourth cylinder (1400) away from the third cylinder (1300). The first pressing block (220) includes two symmetrically arranged first sub-blocks (221). Each first sub-block (221) includes a first arc groove (2211), a second arc groove (2212) and a limiting boss (2213). The two symmetrically arranged first arc grooves (2211), the two symmetrically arranged second arc grooves (2212) and the two symmetrically arranged limiting bosses (2213) jointly enclose to form the tenon groove (230). The inner wall of the first arc groove (2211) is attached to the outer wall of the third cylinder (1300). The inner wall of the second arc groove (2212) is attached to the outer wall of the fourth cylinder (1400). The limiting boss (2213) abuts against the clamping platform (1500); The second pressing block (310) includes a second sub-block (311) and a third sub-block (312). The second sub-block (311) is connected to the second clamping body (300), and the third sub-block (312) is connected to the second sub-block (311). A first clamping groove (3111) is provided on the second sub-block (311), and a second clamping groove (3121) is provided on the third sub-block (312). The first clamping groove (3111) and the second clamping groove (3121) jointly enclose to form the through hole (320), and the protective sleeve (330) is limited in the through hole (320). The jacking assembly (400) includes a jacking block (410) and a second jacking screw (420). The second jacking screw (420) passes through the second clamping body (300) and is threadedly connected to the second clamping body (300). A receiving cavity (340) is provided on the second clamping body (300), and the jacking block (410) is arranged in the receiving cavity (340). One end of the jacking block (410) abuts against the protective sleeve (330), and the other end of the jacking block (410) abuts against the second jacking screw (420).

2. The stator vane fatigue test fixture according to claim 1, characterized in that The first clamping body (200) includes a first jacking screw (240). The first jacking screw (240) passes through the first clamping body (200) and is threadedly connected to the first clamping body (200). The first jacking screw (240) is configured to fix the first pressing block (220) on the first clamping body (200).

3. The stator vane fatigue test fixture according to claim 1, characterized in that, Two waist-shaped holes (3112) are provided on the second sub-block (311) in the vertical direction, and a fastening bolt is respectively passed through each of the two waist-shaped holes (3112), and each fastening bolt is threadedly connected to the second clamping body (300).

4. The stator vane fatigue test fixture according to claim 1, wherein, A light hole (3122) is provided on the third sub-block (312). A threaded hole is provided on the end face of the second sub-block (311) facing the third sub-block (312). The locking bolt passes through the light hole (3122) and extends into the threaded hole to be threadedly connected to the second sub-block (311).

5. The stator vane fatigue test fixture according to claim 1, characterized in that, A plurality of first fixing holes (110) are provided on the first clamping body (200), and a plurality of second fixing holes are provided on the second clamping body (300). A first fixing bolt is respectively passed through each of the first fixing holes (110), and the first fixing bolt is fixedly connected to the chassis (100). A second fixing bolt is respectively passed through each of the second fixing holes, and each second fixing bolt is fixedly connected to the chassis (100).

6. The stator vane fatigue test fixture according to claim 1, wherein, A relief groove is provided on the second pressing block (310), and the relief groove is configured to avoid the second end of the stator blade (1000).

7. Fatigue test equipment, characterized in that, It includes a stator blade fatigue test fixture according to any one of claims 1-6.

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