Fatigue testing device for turbine blade

Abstract

The utility model discloses a fatigue testing device for turbine blades, which belongs to the related technical field of fatigue testing and comprises a support frame, a cover body arranged in the middle of the upper end of the support frame, a seat body arranged in the middle of the cover body, and a clamp arranged at the upper end of the seat body and used for positioning the turbine blades. An upper die is arranged at the upper end of the lower die in a lifting mode, and the protrusions and the limiting rings on the lower die and the upper die are matched with turbine blades in shape. And heating coils and cooling water pipes are arranged in the lower die and the upper die, and are communicated with the temperature display. According to the fatigue testing device for the turbine blade, a stable foundation and a protection environment are provided, and the turbine blade is allowed to be effectively fixed through the design of the clamp; the design of the heating coil and the cooling water pipe respectively ensures the temperature rise and cooling effect in the test process, ensures the accuracy of the test and the reliability of the equipment, and also considers the convenience of operation and the economical efficiency of maintenance at the same time.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of fatigue test, specifically a kind of fatigue test device for turbine blade. BACKGROUND

[0002] In modern aviation industry, turbine blade as the key component of aero-engine, its performance is directly related to the safety and reliability of engine. Turbine blade is influenced by high temperature, high pressure and high-speed rotation and other complex working conditions in the working process, therefore, accurate fatigue test is an important means to guarantee its performance. The existing turbine blade fatigue test technology has some limitations, such as inconvenient operation and maintenance, passive use, thereby causing the low efficiency of measurement, thus a kind of fatigue test device for turbine blade is needed to develop to solve the above technical problems. SUMMARY

[0003] In view of the above problems, the utility model provides a kind of fatigue test device for turbine blade, to solve the technical problem of inconvenient operation and maintenance of turbine blade fatigue test device in prior art.

[0004] To achieve the above object, the technical scheme adopted by the utility model is:

[0005] A kind of fatigue test device for turbine blade, including support frame, the upper end middle part of support frame is provided with cover body, cover body is provided with seat body in middle part, the upper end of seat body is provided with the fixture for positioning turbine blade, fixture includes lower mould, the upper end of lower mould is provided with upper mould in lifting type, the projection on lower mould and upper mould and limiting ring are suitable for the shape of turbine blade;Lower mould and upper mould are provided with heating coil and cooling water pipe in, and communicate with temperature display.

[0006] As a further improvement of the above scheme, cover body includes first side plate, second side plate, front plate, back plate and upper plate, front plate is provided with front door.

[0007] As a further improvement of the above scheme, the upper plate is movably connected with one side of the second side plate, and the other end is arranged in the stepped groove of the first side plate, and the pin is inserted in the stepped groove and the upper plate.

[0008] As a further improvement of the above scheme, the upper mould is provided with the projection suitable for the shape of turbine blade, and the guide sleeve is arranged on the four corners of the upper mould.

[0009] As a further improvement of the above scheme, the upper end middle part of upper mould is provided with air cylinder, and the telescopic rod is arranged on the both sides of air cylinder, the heating coil is arranged on the fixed frame, the fixed frame is provided with U-shaped structure, and the lower end of fixed frame is arranged on seat body.

[0010] As further improvement of the above scheme, four corners of the lower mold are provided with guide columns matched with the guide sleeves, and the middle of the lower mold is provided with a limiting ring and a recess matched with the shape of the turbine blade; the limiting ring is provided with an avoiding groove.

[0011] As further improvement of the above scheme, the heating coil is connected with the power supply through a wire.

[0012] As further improvement of the above scheme, the cooling water pipe is connected with the cold water collecting barrels and the water collecting barrel on both sides through connecting pipes.

[0013] Compared with the prior art, the utility model has the beneficial effects that:

[0014] 1. The utility model provides a kind of fatigue testing device for turbine blade, it provides a stable basis and protection environment, the design of fixture allows effective fixation to turbine blade;The design of heating coil and cooling water pipe ensures temperature rise and cooling effect during testing respectively, ensures the accuracy of test and the reliability of equipment, while also considering the convenience of operation and the economy of maintenance.

[0015] 2. In the utility model, the cover body is composed of multiple side plates and front and rear plates, and the structure design makes the cover body more stable, and the front door arranged on the front plate facilitates the putting and taking of turbine blade by operating personnel.

[0016] 3. In the utility model, the movable connection of upper plate and second side plate and the fixing of step groove in first side plate by pin ensure the stability of cover body, and facilitate the opening and maintenance of upper plate.

[0017] 4. In the utility model, the projection arranged on upper mold is matched with the shape of turbine blade, and the design can ensure the positioning accuracy of turbine blade during testing, improve the accuracy of test. The guide column and guide sleeve are arranged on the corner of lower mold and upper mold respectively, and the matching design makes the lifting of upper mold and lower mold more stable, reduces abrasion, and prolongs the service life of equipment. The design of limiting ring and recess makes turbine blade be accurately positioned and fixed during testing, and the avoiding groove on limiting ring facilitates the installation and disassembly of turbine blade.

[0018] 5. In the utility model, the cooling water pipe is connected with cold water collecting barrel and water collecting barrel through connecting pipe, and the design facilitates rapid cooling and improves test efficiency, and the design of collecting barrel facilitates the recovery and reuse of cooling liquid. DRAWINGS

[0019] Figure 1 It is the front view of the utility model.

[0020] Figure 2 It is the bottom view of upper mold in the utility model.

[0021] Figure 3 It is the top view of the lower mould in the utility model.

[0022] Figure 4 It is the top view of the cover body in the utility model.

[0023] In the drawing: 1, support frame; 2, cold water collecting barrel; 3, temperature display; 4, upper plate; 5, fixing frame; 6, air cylinder; 7, heating coil; 8, cooling water pipe; 9, first side plate; 901, step groove; 10, connecting pipe; 11, water collecting barrel; 12, lower mould; 13, seat body; 14, upper mould; 15, protrusion; 16, guide sleeve; 17, recessed part; 18, limiting ring; 19, guide column; 20, telescopic rod; 21, front door; 22, second side plate; 23, front plate; 24, rear plate; 25, pin. DETAILED DESCRIPTION

[0024] In order to make the person skilled in the art better understand the technical scheme, the utility model is described in detail below in combination with examples, and the description in this part is only exemplary and explanatory, and should not have any limiting effect on the protection scope of the utility model.

[0025] As shown in Figures 1-4 , the specific scheme of the embodiment is: a fatigue testing device for turbine blade, comprising support frame 1, the upper end middle part of support frame 1 is provided with cover body, the inner middle part of cover body is provided with seat body 13, the upper end of seat body 13 is provided with clamp for positioning turbine blade, the clamp comprises lower mould 12, the upper end of lower mould 12 is provided with upper mould 14 in lifting type, the protrusion 15, limiting ring 18 on lower mould 12 and upper mould 14 are suitable for the shape of turbine blade; heating coil 7 and cooling water pipe 8 are arranged in lower mould 12 and upper mould 14, and are communicated with temperature display 3.

[0026] As shown in Figure 4 , as the preferred mode of the above embodiment, the cover body comprises first side plate 9, second side plate 22, front plate 23, rear plate 24 and upper plate 4, and the front door 21 is arranged on the front plate 23. The upper plate 4 is movably connected with one side of the second side plate 22, the other end is arranged in the step groove 901 of the first side plate 9, and the pin 25 is inserted in the step groove 901 and the upper plate 4.

[0027] As shown in Figure 2 , as the preferred mode of the above embodiment, the protrusion 15 suitable for the shape of turbine blade is arranged on the upper mould 14, and the guide sleeve 16 is arranged on the four corners of the upper mould 14.

[0028] As shown in Figure 1As shown, in a preferred embodiment, a cylinder 6 is provided at the upper middle part of the upper mold 14, and telescopic rods 20 are provided on both sides of the cylinder 6. The heating coil 7 is provided on the fixed frame 5, which is a U-shaped structure, and the lower end of the fixed frame 5 is provided on the base 13.

[0029] like Figure 3 As shown, in a preferred embodiment, the lower mold 12 is provided with guide posts 19 at its four corners that are compatible with the guide sleeve 16, and the lower mold 12 is provided with a limiting ring 18 and a recess 17 in the middle that are compatible with the shape of the turbine blade; the limiting ring 18 is provided with an avoidance groove.

[0030] like Figure 1 As shown, in a preferred embodiment of the above, the heating coil 7 is connected to the power supply via a wire.

[0031] like Figure 1 As shown, in a preferred embodiment of the above, the cooling water pipe 8 is connected to the cold water collection tank 2 and the water collection tank 11 on both sides via the connecting pipe 10.

[0032] The specific working principle of this utility model is as follows:

[0033] Working principle:

[0034] Support frame and enclosure: The support frame 1 serves as the foundation of the entire device, and the enclosure at the upper middle part of it protects and isolates the internal components, ensuring the stability of the test environment.

[0035] Seat 13 and clamps: Seat 13 is located inside the housing and is used to fix the clamps. The clamps include a lower mold 12 and an upper mold 14, which are used in conjunction with a cylinder 6 and a telescopic rod 20 to position and fix the turbine blades to be tested.

[0036] Protrusions and limiting rings: The protrusions 15 on the upper mold 14 and the limiting rings 18 and recesses 17 on the lower mold 12 are adapted to the shape of the turbine blades to ensure the precise positioning and fixation of the blades during the test.

[0037] Heating coil and cooling water pipe: Heating coil 7 is used to heat the turbine blades to simulate the high-temperature environment in actual operation. Cooling water pipe 8 is used to cool the blades to simulate the rapid cooling process during thermal shock.

[0038] Temperature display: Connected to heating coil 7 and cooling water pipe 8, it is used to monitor the temperature of the blades in real time to ensure the accuracy of temperature control during the test.

[0039] Work process:

[0040] 1. Install the blade: Place the turbine blade to be tested into the limiting ring 18 and the recess 17 of the lower mold 12 for fixation.

[0041] 2. Clamp closure: The telescopic rod 20 is driven by the air cylinder 6, causing the upper die 14 to descend and close with the lower die 12, clamping the turbine blade.

[0042] 3. Heating process: Start the heating coil 7 to heat the blade. The heat generated by the heating coil 7 is transmitted to the blade through the lower die 12 and the upper die 14, simulating the high-temperature working environment.

[0043] 4. Cooling process: After reaching the predetermined temperature, start the cooling water pipe 8 to cool the blade through water circulation, simulating the rapid cooling process in thermal shock.

[0044] 5. Temperature monitoring: During the entire heating and cooling process, the temperature display 3 displays the temperature of the blade in real time, ensuring that the test process meets the predetermined temperature curve.

[0045] 6. Cycle test: According to the predetermined test program, repeat the heating and cooling cycle to simulate the thermal shock fatigue process of the turbine blade in actual use.

[0046] 7. Data recording: During the test process, record the temperature change, crack initiation and propagation of the blade, etc. for evaluating the fatigue life and performance of the blade.

[0047] 8. Test completion: After reaching the predetermined number of cycles or the blade appears destructive damage, stop the test and perform data analysis and result evaluation.

[0048] Through the above working principle and working process, the fatigue test device can comprehensively evaluate the performance of the turbine blade under high temperature and thermal shock conditions, providing important experimental basis for the design and material selection of the turbine blade.

[0049] It should be noted that in this paper, the terms include, contain or any other variants are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or includes elements inherent to such process, method, article or device. In this paper, specific examples are used to describe the principles and implementation of the technical scheme of the utility model. The above example is only used to help understand the method and core idea of the utility model. The above description is only the preferred embodiment of the utility model. It should be noted that due to the limitation of language expression, there are infinite specific structures objectively. For ordinary technical personnel in this technical field, without departing from the principle of the utility model, some improvements, decorations or changes can be made, or the above technical features can be combined in a proper way; these improvements, decorations, changes or combinations, or without improvement, the utility model concept and technical scheme are directly applied to other occasions, which should be regarded as the protection scope of the utility model.

Claims

1. A fatigue testing device for turbine blades, characterized in that, The device includes a support frame (1), a cover is provided at the middle of the upper end of the support frame (1), a seat (13) is provided at the middle of the cover, and a fixture for positioning turbine blades is provided at the upper end of the seat (13). The fixture includes a lower mold (12), and an upper mold (14) is provided at the upper end of the lower mold (12) in a lifting manner. The protrusions (15) and the limiting rings (18) on the lower mold (12) and the upper mold (14) are adapted to the shape of the turbine blades. Heating coils (7) and cooling water pipes (8) are provided in both the lower mold (12) and the upper mold (14), and they are connected to a temperature display (3).

2. The fatigue testing device for turbine blades according to claim 1, characterized in that, The cover includes a first side panel (9), a second side panel (22), a front panel (23), a rear panel (24) and an upper panel (4), with a front door (21) provided on the front panel (23).

3. The fatigue testing device for turbine blades according to claim 1, characterized in that, The upper plate (4) is movably connected to one side of the second side plate (22), and the other end is set in the step groove (901) of the first side plate (9), and is inserted into the step groove (901) and the upper plate (4) by a pin (25).

4. The fatigue testing device for turbine blades according to claim 1, characterized in that, The upper mold (14) is provided with protrusions (15) that are adapted to the shape of the turbine blades, and guide sleeves (16) are provided at the four corners of the upper mold (14).

5. The fatigue testing device for turbine blades according to claim 1, characterized in that, A cylinder (6) is provided at the upper middle part of the upper mold (14), and telescopic rods (20) are provided on both sides of the cylinder (6). The heating coil (7) is set on the fixed frame (5), which is a U-shaped structure. The lower end of the fixed frame (5) is set on the base (13).

6. The fatigue testing device for turbine blades according to claim 4, characterized in that, The lower mold (12) has guide posts (19) at its four corners that are compatible with the guide sleeve (16), and a limiting ring (18) and a recess (17) in the middle of the lower mold (12) that are compatible with the shape of the turbine blade; the limiting ring (18) has an avoidance groove.

7. The fatigue testing device for turbine blades according to claim 1, characterized in that, The heating coil (7) is connected to the power source via a wire.

8. The fatigue testing device for turbine blades according to claim 1, characterized in that, The cooling water pipe (8) is connected to the cold water collection tank (2) and the water collection tank (11) on both sides via the connecting pipe (10).

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