A turbine blade film hole permeability detection device

Abstract

The turbine blade film hole permeability detection device comprises an execution module, the execution module comprises a detection table and a detection table box body, the detection table is located in the detection table box body, the detection table comprises a rack, a pool, a water tank, an upper water supply pipe, a lower water supply pipe and a water pump, the pool and the water tank are located on the rack, the pool is located above the water tank, a high-speed camera is arranged on the rack outside the pool, a blade fixing seat is arranged in the pool, a turbine blade is installed on the blade fixing seat, an electric rotating table is installed on the rack below the pool, the electric rotating table is connected with the upper water supply pipe through a rotating water supply joint, the upper water supply pipe is connected with the blade fixing seat, a water pump is arranged in the water tank, the water pump is connected with the rotating water supply joint through a lower water supply pipe, the pool is connected with a drain pipe through a drain valve, and the drain pipe is communicated with the water tank. The application is convenient to transport and is not easily disturbed by the external environment, the image recognition technology improves the detection efficiency and precision, and the pure water closed cycle can reduce the use cost of the device.

Description

TECHNICAL FIELD

[0001] The present application relates to a turbine detection device, in particular a turbine blade detection device. BACKGROUND

[0002] Turbine blade is one of the important parts of gas turbine, which plays a role in driving the rotation of the gas turbine rotor. In the work, the turbine blade needs to withstand the impact of high-temperature gas. Cooling air enters the inside of the blade through the opening at the end of the turbine blade, and finally is sprayed out of the gas film hole on the surface of the blade and forms a low-temperature gas film on the surface of the blade to protect the blade from the hot corrosion of high-temperature gas, thereby prolonging the service life of the turbine blade. The size of the gas film hole on the surface of the turbine blade is extremely small, and it is easy to be blocked by impurities during processing and transportation. Therefore, the permeability of the gas film hole of the turbine blade needs to be detected before it is installed. Low-cost, easily available high-purity water is harmless to turbine blades made of alloy materials, so water is injected into the turbine blade by a water pump. If the gas film hole is not blocked, the water will be smoothly sprayed out of the gas film hole. If the gas film hole is blocked, the water column will be different from other water columns, or no water column will be generated. The permeability of the gas film hole is judged by using computer image recognition technology. SUMMARY

[0003] The purpose of the present application is to provide a turbine blade gas film hole permeability detection device that can evaluate and judge the state of the turbine blade.

[0004] The purpose of the present application is achieved in that:

[0005] The turbine blade gas film hole permeability detection device of the present application is characterized by comprising an execution module, the execution module comprising a detection table and a detection table box body, the detection table being located in the detection table box body, the detection table comprising a rack, a water tank, a water tank, an upper water supply pipe, a lower water supply pipe, a water pump, the water tank and the water tank being located on the rack, the water tank being located above the water tank, a high-speed camera being arranged on the rack outside the water tank, a blade fixing seat being arranged in the water tank, a turbine blade being installed on the blade fixing seat, an electric rotating table being installed on the rack below the water tank, the electric rotating table being connected to the upper water supply pipe through a rotating water supply connector, the upper water supply pipe being connected to the blade fixing seat, a water pump being arranged in the water tank, the water pump being connected to the rotating water supply connector through the lower water supply pipe, the water tank being connected to a drain pipe through a drain valve, and the drain pipe being connected to the water tank.

[0006] The present application can also include:

[0007] 1. The material of the water tank is a high-transmittance material, and the bottom thereof comprises a glass plate inclined to the horizontal direction and a groove.

[0008] 2. The center of the groove is a boss with a round hole in the center. The water supply pipe passes through the round hole in the center of the boss. The round hole is higher than the bottom of the groove. The collected water flows back to the water tank through the drain valve and drain pipe.

[0009] 3. The blade holder is made of soft material. The bottom has a round hole that can match the diameter of the water supply pipe, and the top has an interface that can match the turbine blade. The top and bottom interfaces are connected, and water is injected into the turbine blade through the two interfaces.

[0010] 4. A windshield wiper is installed in the pool perpendicular to the shooting direction of the high-speed camera.

[0011] 5. It also includes an evaluation module. A high-speed camera is connected to the evaluation module. The turbine blades rotate around an axis parallel to the blade height direction, so that all the film pores on the surface of the turbine blades can enter the shooting range of the high-speed camera. The high-speed camera collects the water spraying situation of the film pores on the surface of the turbine blades, and the collection results are transmitted to the evaluation module. The evaluation module judges whether the film pores are blocked by the shape of the water column sprayed from the film pores. The position of the high-speed camera is fixed during the collection process.

[0012] 6. The width of the blade fixing seat should be 1-2 mm larger than the width of the U-shaped groove at the top of the water supply pipe.

[0013] The advantages of this invention are:

[0014] 1. Using image recognition technology to inspect the permeability of turbine blades can improve inspection efficiency and accuracy;

[0015] 2. Using high-purity water as the detection medium, the permeability status of the air film pores of the turbine blades is fed back;

[0016] 3. A blade mounting bracket is used to connect the turbine blades to the upper water supply pipe. The blade mounting bracket is compatible with turbine blades of different base types.

[0017] 4. The modular design facilitates storage and transportation, and the boxed design makes the testing process less susceptible to external environmental influences. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the present invention;

[0019] Figure 2 This is a schematic diagram of the entire testing station;

[0020] Figure 3 A schematic diagram of the water supply and drainage structure at the bottom of the pool;

[0021] Figure 4 This includes a cross-sectional view of the water tank and a three-dimensional schematic diagram of the entire water tank.

[0022] Figure 5The schematic diagram of the top opening of the turbine blade fixing seat;

[0023] Figure 6 The schematic diagram of the bottom opening of the turbine blade fixing seat;

[0024] Figure 7 The schematic diagram of the turbine blade fixed on the top of the upper water supply pipe. DETAILED DESCRIPTION

[0025] The application will be described in more detail below with examples and accompanying drawings:

[0026] In combination Figures 1-7 The turbine blade gas film hole permeability detection device of the application comprises an execution module 1 and an evaluation module 2, wherein the execution module 1 comprises a detection table 1.1 and a detection table box body 1.2, and the evaluation module 2 comprises a display 2.1, a host computer 2.2 and a host computer box body 2.3.

[0027] The detection table 1.1 is composed of a windshield 1.1.1, a water tank 1.1.2, a high-speed camera 1.1.3, a rack 1.1.4, a water tank 1.1.5, a turbine blade 1.1.6, a blade fixing seat 1.1.7, an upper water supply pipe 1.1.8, a purifier 1.1.9, a water pump 1.1.10, a drain valve 1.1.11, a drain pipe 1.1.12, a rotary water supply joint 1.1.13, an electric rotary table 1.1.14 and a lower water supply pipe 1.1.15. All the devices and components are fixed in the detection table box body 1.2 and the host computer box body 2.3.

[0028] All the components on the detection table 1.1 are fixed on the rack 1.1.4. The water tank 1.1.2 is located at the upper end of the rack 1.1.4, the water tank 1.1.5 is located at the lower part of the rack 1.1.4, the water pump 1.1.10 is located in the water tank 1.1.5, and the water pump 1.1.10, the purifier 1.1.9, the lower water supply pipe 1.1.15, the rotary water supply joint 1.1.13, the upper water supply pipe 1.1.8, the blade fixing seat 1.1.7 and the turbine blade 1.1.6 are sequentially connected, wherein the rotary water supply joint 1.1.13, the upper water supply pipe 1.1.8, the blade fixing seat 1.1.7 and the turbine blade 1.1.6 are driven by the electric rotary table 1.1.14 and can rotate.

[0029] The bottom of the water tank 1.1.2 is provided with the drain valve 1.1.11 and the drain pipe 1.1.12, which can collect the water discharged from the turbine blade into the water tank 1.1.5. The windshield 1.1.1 is located above the water tank 1.1.2, and the high-speed camera 1.1.3 is installed in front of the water tank 1.1.2. The high-speed camera 1.1.3 transmits the collected images to the evaluation module 2 for evaluation of the gas film hole permeability.

[0030] The water tank 1.1.2 in the detection platform 1.1 is located above the water tank 1.1.5, so that the water discharged by the turbine blade 1.1.6 can flow back to the water tank 1.1.5 under the action of gravity.

[0031] The water tank 1.1.2 is made of high-transmittance quartz glass, and its bottom is composed of a glass plate inclined to the horizontal direction and a groove, which is conducive to collecting the water discharged by the turbine blade 1.1.6 and avoiding the accumulation of water in the water tank 1.1.2. The center of the groove is a boss, and a circular hole is formed in the center of the boss for the water supply pipe 1.1.8 to pass through. Since the position of the circular hole is higher than the bottom of the groove, the collected water will not leak out from the gap between the circular hole and the water pipe 1.1.8, but will flow back to the water tank 1.1.5 through the drain valve 1.1.11 and the drain pipe 1.1.12.

[0032] The glass in the water tank 1.1.2 that is perpendicular to the shooting direction of the high-speed camera 1.1.3 is equipped with a windshield wiper 1.1.1 to remove water droplets splashed onto the glass to avoid interference with image acquisition.

[0033] The water pump 1.1.10 needs to use a purifier 1.1.9 to purify the detection medium water in advance when supplying water to the turbine blade, to avoid the impurities contained in the water causing fouling and blockage of the gas film holes of the turbine blade 1.1.6 and the channels inside them.

[0034] The turbine blade 1.1.6 rotates around an axis parallel to the blade height direction, so that all the gas film holes on the surface of the turbine blade 1.1.6 can enter the shooting range of the high-speed camera 1.1.3. The high-speed camera 1.1.3 will collect the water spray situation of the gas film holes on the surface of the turbine blade 1.1.6, and the collection results will be transmitted to the evaluation module 2. The image recognition software will judge whether the gas film holes are blocked by the shape of the water column sprayed by the gas film holes. The position of the high-speed camera 1.1.3 is fixed during the collection process.

[0035] The electric rotating platform 1.1.14 is used to drive the rotation of the turbine blade 1.1.6. The structure that rotates with the turbine blade 1.1.6 also includes the blade fixing seat 1.1.7 and the upper water supply pipe 1.1.8, while the lower water supply pipe 1.1.15 does not rotate. The upper water supply pipe 1.1.8 and the lower water supply pipe 1.1.15 are connected by a rotating water supply joint 1.1.13.

[0036] The blade fixing seat 1.1.7 is made of soft rubber, and a circular hole with a diameter matching that of the upper water supply pipe 1.1.8 is formed in the bottom, and the top has an interface matching the turbine blade 1.1.6, and the top and bottom interfaces are connected, so that water can be injected into the blade through the two interfaces, and the width of the blade fixing seat 1.1.7 is 1-2mm larger than the width of the U-shaped groove at the top of the upper water supply pipe 1.1.8, so as to be fixed at the top of the upper water supply pipe 1.1.8, and the compressed rubber can ensure the water tightness of the interfaces.

[0037] When the water pump 1.1.10 is powered on, the water in the water tank 1.1.5 is first driven by the water pump 1.1.10 to flow through the purifier 1.1.9, and the impurities in the water are filtered by the purifier 1.1.9, and the purified water will flow through the lower water supply pipe 1.1.15, the rotating water supply joint 1.1.13, the upper water supply pipe 1.1.8 and the blade fixing seat 1.1.7 in turn, and finally injected into the turbine blade 1.1.6, and the cooling channel inside the turbine blade 1.1.6 is connected with the gas film hole on the surface of the turbine blade, if the gas film hole is not blocked, water will be sprayed from the gas film hole and form a water column, and when the gas film hole is blocked, the shape of the water column will change or no water column will be formed, the above phenomenon will be collected by the high-speed camera 1.1.3, and the collected image is transmitted to the evaluation module 2 to evaluate the permeability of the gas film hole through image recognition software. When the detection is completed, the motorized rotary table 1.1.14 will rotate the turbine blade 1.1.6 to make the undetected gas film hole align with the high-speed camera 1.1.3, and the above-mentioned collection and evaluation work will be repeated. The rotating water supply joint 1.1.13 connects the lower water supply pipe 1.1.15 and the upper water supply pipe 1.1.8, and can ensure that rotation and water supply are performed simultaneously. The water sprayed from the turbine blade 1.1.6 will flow into the water tank 1.1.5 through the drain valve 1.1.11 and the drain pipe 1.1.12 at the bottom of the water tank 1.1.2, and the water droplets splashed on the glass of the water tank 1.1.2 will be cleaned by the windshield wiper 1.1.1.

Claims

1. A device for detecting the film permeability of turbine blades, characterized in that: The system includes an execution module, which comprises a testing platform and a testing platform housing. The testing platform is located inside the testing platform housing. The testing platform includes a frame, a water tank, a water reservoir, an upper water supply pipe, a lower water supply pipe, and a water pump. The water tank and water reservoir are both located on the frame, with the water tank located above the water reservoir. A high-speed camera is installed on the frame outside the water tank. A blade mounting base is installed inside the water tank, and turbine blades are installed on the blade mounting base. An electric rotating platform is installed on the frame below the water tank. The electric rotating platform is connected to the upper water supply pipe via a rotating water supply connector. The upper water supply pipe is connected to the blade mounting base. A water pump is installed inside the water reservoir. The water pump is connected to the rotating water supply connector via the lower water supply pipe. The water tank is connected to a drain pipe via a drain valve, and the drain pipe is connected to the water reservoir. It also includes an evaluation module. A high-speed camera is connected to the evaluation module. The turbine blades rotate around an axis parallel to the blade height, so that all the film vents on the surface of the turbine blades can enter the shooting range of the high-speed camera. The high-speed camera collects the water spraying situation of the film vents on the surface of the turbine blades, and the collection results are transmitted to the evaluation module. The evaluation module judges whether the film vents are blocked by the shape of the water jets sprayed from the film vents. The position of the high-speed camera is fixed during the collection process.

2. The turbine blade film permeability detection device according to claim 1, characterized in that: The pool is made of a highly transparent material, and its bottom includes a glass plate inclined horizontally and a groove.

3. The turbine blade film permeability detection device according to claim 2, characterized in that: The groove has a boss at its center, with a round hole in the center of the boss. The water supply pipe passes through the round hole in the center of the boss. The round hole is higher than the bottom of the groove. The collected water flows back to the water tank through the drain valve and drain pipe.

4. The turbine blade film permeability detection device according to claim 1, characterized in that: The blade holder is made of soft material, with a round hole at the bottom that matches the diameter of the water supply pipe, and an interface at the top that matches the turbine blade. The top and bottom interfaces are connected, and water is injected into the turbine blade through the two interfaces.

5. The turbine blade film permeability detection device according to claim 1, characterized in that: The pool is equipped with windshield wipers perpendicular to the shooting direction of the high-speed camera.

6. The turbine blade film permeability detection device according to claim 1, characterized in that: The width of the blade fixing seat should be 1-2 mm larger than the width of the U-shaped groove at the top of the water supply pipe.

Images