Turbine blade measuring device

Abstract

The utility model discloses a turbine blade measuring device, and relates to the technical field of measuring devices. A turbine blade measuring device comprises a metal sleeve and a rotating shaft, a fan is fixedly mounted on the left side in the metal sleeve, an ultrasonic probe is fixedly mounted at the rear end of a mounting seat, an electromagnetic sensor is fixedly mounted at the rear end of a mounting plate, and a soft magnetic iron core is fixedly mounted at the rear end of the electromagnetic sensor. A force sensitive sensor is fixedly mounted on the mounting box, a rectifier is arranged at the position, close to the left side, of the outer surface of the rotating shaft, turbine blades are fixedly connected to the position, close to the center, of the outer surface of the rotating shaft, and a sliding block is fixedly mounted on the outer surface of the limiting frame; a nickel gear is fixedly installed at the position, close to the center, of the right side of the outer surface of the rotating shaft, permanent magnets are fixedly installed at the periphery of the outer surface of the nickel gear, and a strain gauge is fixedly installed at the position, close to the right side, of the outer surface of the rotating shaft.

Description

Technical Field

[0001] The utility model relates to the technical field of measuring devices, in particular to a turbine blade measuring device. Background Art

[0002] Chinese utility model patent CN219141688U discloses a measuring device for aircraft engine turbine blade experiments, which relates to the technical field of measuring devices. It aims to solve the problem that existing measuring devices cannot measure the fixed length of each blade one by one when measuring aircraft engine blades, resulting in poor blade measurement accuracy. It includes a carrier plate, a cross inner frame is provided inside the carrier plate, the cross inner frame and the carrier plate are integrally formed, a connecting shaft is provided on the front end surface of the cross inner frame, and the connecting shaft and the cross inner frame are integrally formed; it also includes: a movable rotating rod, which is provided at the front end position of the cross inner frame, and an inscribed circular hole is provided inside the movable rotating rod, the inscribed circular hole and the movable rotating rod are integrally formed, and the movable rotating rod is movably connected to the connecting shaft through the inscribed circular hole; a built-in cavity is provided inside the movable rotating rod, the built-in cavity and the movable rotating rod are integrally formed, and an extension rod is provided inside the built-in cavity.

[0003] A turbine engine utilizes the exhaust gas of a gas turbine engine (referred to as a gas turbine) to drive the turbine rotor, converting the energy of the gas into mechanical energy. The turbine blades are a crucial energy conversion device that converts gas energy into engine mechanical energy. Parameters such as the blade shape and eccentricity of the turbine blades play an important role in the actual use and safety of the turbine engine. High blade eccentricity can produce significant vibration, affecting the safe use of the engine. Therefore, turbine blades need to be inspected to determine their energy conversion efficiency, thus requiring a turbine blade measurement device. Utility Model Content

[0004] The utility model provides a turbine blade measuring device to solve the problems in the background technology.

[0005] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: a turbine blade measuring device, comprising a metal sleeve and a rotating shaft, a fan is fixedly installed on the left side of the interior of the metal sleeve, a mounting seat is fixedly installed on the right side of the interior front end wall of the metal sleeve near the center, an ultrasonic probe is fixedly installed on the rear end of the mounting seat, a mounting plate is fixedly installed on the right side of the interior front end wall of the metal sleeve near the center, an electromagnetic sensor is fixedly installed on the rear end of the mounting plate, a soft magnetic core is fixedly installed on the rear end of the electromagnetic sensor, a mounting box is fixedly installed on the right side of the interior front end wall of the metal sleeve near the center, a force-sensitive sensor is fixedly installed on the mounting box, a mobile power supply is fixedly installed on the mounting box, and the exterior of the rotating shaft is fixedly installed. A rectifier is provided near the left side of the surface, a slide rail is fixedly installed on the inner wall of the metal sleeve near the center, a turbine blade is fixedly connected to the outer surface of the rotating shaft near the center, a limiting frame is fixedly installed on the periphery of the outer surface of the turbine blade, a turbine guide is fixedly installed near the left side of the interior of the limiting frame, a bearing is provided at the connection between the turbine guide and the rotating shaft, a vibration sensor is provided at the connection between the turbine guide and the rotating shaft, a slider is fixedly installed on the outer surface of the limiting frame, a nickel gear is fixedly installed on the right side of the outer surface of the rotating shaft near the center, a permanent magnet is fixedly installed on the periphery of the outer surface of the nickel gear, and a strain gauge is fixedly installed on the outer surface of the rotating shaft near the right side.

[0006] Furthermore, the outer surface of the slider is movably sleeved with the inner portion of the slide rail.

[0007] Furthermore, a stabilizing frame is fixedly installed around the outer surface of the rectifier, the outer surface of the stabilizing frame is fixedly connected to the inner wall of the metal sleeve, and the connection between the inner center of the rectifier and the outer surface of the rotating shaft is connected through a ball bearing.

[0008] Furthermore, the sensing end of the ultrasonic probe is adjacent to the turbine blade, but the turbine blade is not close to the ultrasonic probe.

[0009] Furthermore, the soft magnetic core and the electromagnetic sensor are both adjacent to the nickel gear, but the soft magnetic core and the electromagnetic sensor are not in contact with the nickel gear.

[0010] Furthermore, a magnetic encoder is provided inside the installation box, and the installation box is provided with a rotation speed detection system.

[0011] Furthermore, the soft magnetic core and the electromagnetic sensor are electrically connected to a rotation speed detection system.

[0012] Furthermore, the installation box is signal-connected to a control box, and the control box to which the installation box is signal-connected is provided with a signal control unit matched with the vibration sensor, and the rotating shaft is located inside the metal sleeve.

[0013] Compared with the prior art, the present invention provides a turbine blade measuring device with the following features:

[0014] Beneficial effects:

[0015] 1. The turbine blade measuring device can enhance the stability of the turbine blade during rotation by providing a slider and a slide rail.

[0016] 2. The turbine blade measuring device, by setting up an ultrasonic probe, can be used to detect the wall thickness of the turbine blade in operation or at rest, as well as to detect internal defects such as cracks and pores. The ultrasonic probe uses the propagation characteristics of ultrasonic waves in the material to detect the internal structure of the material. When the ultrasonic wave encounters a defect in the material, it will generate a reflected wave at the defect. By analyzing the characteristics of these reflected waves, the integrity and health of the turbine blade can be evaluated.

[0017] 3. The turbine blade measuring device is equipped with a soft magnetic core, an electromagnetic sensor, a permanent magnet, a force-sensitive sensor and a strain gauge. The rotation of the nickel gear causes the permanent magnet to generate a changing magnetic field. When it approaches the soft magnetic core and the electromagnetic sensor, a periodic change in magnetic flux is generated in the iron core. The electromagnetic sensor can detect this change, convert it into an electrical signal and transmit it to the signal transceiver inside the installation box, and then send it electrically to the control box through the signal transceiver, so that the operator can timely understand the energy conversion efficiency of the turbine blade. At the same time, when the rotating shaft rotates, the strain gauge driven by it will produce a slight deformation due to the rotation of the rotating shaft, and such deformation will cause the resistance value of the strain gauge to change; through the Wheatstone bridge circuit, this resistance change can be converted into a change in the voltage signal; the force-sensitive sensor can accurately measure the strain change of the turbine blade caused by the rotation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall structure of the rotating shaft and the metal sleeve of the utility model;

[0019] Figure 2 This is the overall internal structure diagram of the rotating shaft and metal sleeve of the utility model

[0020] Figure 3 This is a structural diagram of the connection between the rotating shaft and the metal sleeve of the utility model;

[0021] Figure 4 It is an enlarged view of point A of the present utility model.

[0022] In the figure: 1. Fan; 2. Rotating shaft; 3. Metal sleeve; 4. Turbine blade; 5. Permanent magnet; 6. Nickel gear; 7. Strain gauge; 8. Rectifier; 9. Force sensor; 10. Mounting box; 11. Mobile power supply; 12. Mounting plate; 13. Soft magnetic core; 14. Electromagnetic sensor; 15. Slider; 16. Stabilizing frame; 17. Limiting frame; 18. Ultrasonic probe; 19. Mounting base; 20. Slide rail; 21. Tip clearance measurement probe. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] See also Figure 1-4 The utility model discloses a turbine blade measuring device, including a metal sleeve 3 and a rotating shaft 2. A fan 1 is fixedly installed on the left side of the interior of the metal sleeve 3. A mounting seat 19 is fixedly installed on the right side of the interior front end wall of the metal sleeve 3 near the center. An ultrasonic probe 18 is fixedly installed on the rear end of the mounting seat 19. A mounting plate 12 is fixedly installed on the right side of the interior front end wall of the metal sleeve 3 near the center. An electromagnetic sensor 14 is fixedly installed on the rear end of the mounting plate 12. A soft magnetic core 13 is fixedly installed on the rear end of the electromagnetic sensor 14. A mounting box 10 is fixedly installed on the right side of the interior front end wall of the metal sleeve 3 near the center. A force sensitive sensor 9 is fixedly installed on the mounting box 10. A mobile power supply 11 is fixedly installed on the mounting box 10. A position near the left side of the outer surface of the rotating shaft 2 is provided There is a rectifier 8, a slide rail 20 is fixedly installed on the inner wall of the metal sleeve 3 near the center, a turbine blade 4 is fixedly connected to the outer surface of the rotating shaft 2 near the center, and a limiting frame 17 is fixedly installed on the periphery of the outer surface of the turbine blade 4, a turbine guide 22 is fixedly installed on the inside of the limiting frame 17 near the left side, a bearing 22 is provided at the connection between the turbine guide 22 and the rotating shaft 2, and a vibration sensor 21 is provided at the connection between the turbine guide 22 and the rotating shaft 2, a slider 15 is fixedly installed on the outer surface of the limiting frame 17, a nickel gear 6 is fixedly installed on the right side of the outer surface of the rotating shaft 2 near the center, a permanent magnet 5 is fixedly installed on the periphery of the outer surface of the nickel gear 6, and a strain gauge 7 is fixedly installed on the outer surface of the rotating shaft 2 near the right side.

[0025] Specifically, the outer surface of the slider 15 is movably sleeved with the inner portion of the slide rail 20 .

[0026] Specifically, a stabilizing frame 16 is fixedly installed around the outer surface of the rectifier 8, the outer surface of the stabilizing frame 16 is fixedly connected to the inner wall of the metal sleeve 3, and the connection between the inner center of the rectifier 8 and the outer surface of the rotating shaft 2 is connected through a ball bearing.

[0027] In this embodiment, the rotating shaft 2 is prevented from driving the rectifier 8 to rotate when rotating, and the stability of the rectifier 8 is enhanced.

[0028] Specifically, the sensing end of the ultrasonic probe 18 is adjacent to the turbine blade 4 , but the turbine blade 4 is not close to the ultrasonic probe 18 .

[0029] In this embodiment, subsequent detection by the magnetic core and the electromagnetic sensor 14 is facilitated.

[0030] Specifically, the soft magnetic core 13 and the electromagnetic sensor 14 are both adjacent to the nickel gear 6 , but the soft magnetic core 13 and the electromagnetic sensor 14 are not close to the nickel gear 6 .

[0031] In this embodiment, it is convenient for the subsequent soft magnetic core 13 and electromagnetic sensor 14 to detect

[0032] Specifically, a magnetic encoder is provided inside the installation box 10 , and the installation box 10 is provided with a rotation speed detection system.

[0033] Specifically, the soft magnetic core 13 and the electromagnetic sensor 14 are electrically connected to the rotation speed detection system.

[0034] Specifically, the installation box 10 is signal-connected to a control box, and the control box to which the installation box 10 is signal-connected is provided with a signal control unit matched with the vibration sensor 21 . The rotating shaft 2 is located inside the metal sleeve 3 .

[0035] In this embodiment, the vibration sensor 21 is connected to the signal processing unit via a cable, so that the change of the clearance of the turbine blades 4 can be monitored in real time, thereby effectively monitoring the vibration of the turbine blades 4, which plays an important role in the health monitoring and fault prevention of the turbine engine.

[0036] During use, the air flow is drawn into the metal sleeve 3 through the fan 1. When the air flow passes through the rectifier 8, the rectifier 8 helps to reduce the turbulence and eddy current in the air flow, thereby improving the air flow efficiency and reducing noise. Subsequently, the air flow drives the turbine blade 4 to rotate when passing through the rectifier 8 and then through the turbine blade 4. When the turbine blade 4 rotates, the slider 15 moves together on the slide rail 20, thereby enhancing the stability of the turbine blade 4 during rotation. Subsequently, the turbine blade 4 also drives the rotating shaft 2 to rotate when rotating. The turbine blade 4 is non-destructively tested by the ultrasonic probe 18 when rotating, so as to detect the wall thickness of the turbine blade 4 in operation or at rest, and detect internal defects such as cracks, pores, integrity and health status. At the same time, the strain gauge 7 and the nickel gear 6 are driven to rotate by the rotating shaft 2, and the rotation speed of the nickel gear 6 is detected by the soft magnetic core 13, the electromagnetic sensor 14 and the force sensitive sensor 9; when the rotating shaft 2 When the nickel gear 6 is driven to rotate, the permanent magnet 5 on the nickel gear 6 also rotates. The rotation of the nickel gear 6 causes the permanent magnet 5 to generate a changing magnetic field. When it approaches the soft magnetic core 13 and the electromagnetic sensor 14, a periodic change in magnetic flux is generated in the iron core. The electromagnetic sensor 14 can detect this change, convert it into an electrical signal, and transmit it to the signal transceiver inside the installation box 10. The signal is then electrically sent to the control box through the signal transceiver, so that the operator can timely understand the energy conversion efficiency of the turbine blade 4. At the same time, when the rotating shaft 2 rotates, the strain gauge 7 driven by it will produce a slight deformation due to the rotation of the rotating shaft 2. Such deformation will cause the resistance value of the strain gauge 7 to change; through the Wheatstone bridge circuit, this resistance change can be converted into a change in the voltage signal; the force sensitive sensor 9 can accurately measure the strain change of the turbine blade 4 caused by the rotation.

[0037] In summary, the turbine blade measuring device, by providing a slider 15 and a slide rail 20, can enhance the stability of the turbine blade 4 during rotation; by providing an ultrasonic probe 18, it can be used to detect the wall thickness of the turbine blade 4 in operation or at rest and to detect internal defects such as cracks and pores; the ultrasonic probe 18 utilizes the propagation characteristics of ultrasonic waves in the material to detect the internal structure of the material; when the ultrasonic wave encounters a defect in the material, it will generate a reflected wave at the defect, and by analyzing the characteristics of these reflected waves, the integrity and health of the turbine blade 4 can be evaluated; by providing a soft magnetic core 13, an electromagnetic sensor 14, a permanent magnet 5, a force sensitive sensor 9 and a strain gauge 7, the rotation of the nickel gear 6 causes the permanent magnet 5 to generate a changing magnetic field When it approaches the soft magnetic core 13 and the electromagnetic sensor 14, it will generate periodic magnetic flux changes in the iron core. The electromagnetic sensor 14 can detect this change, convert it into an electrical signal and transmit it to the signal transceiver inside the installation box 10, and then send it electrically to the control box through the signal transceiver, so that the operator can timely understand the energy conversion efficiency of the turbine blade 4. At the same time, when the rotating shaft 2 rotates, the strain gauge 7 driven by it will produce a slight deformation due to the rotation of the rotating shaft 2. Such deformation will cause the resistance value of the strain gauge 7 to change; through the Wheatstone bridge circuit, this resistance change can be converted into a change in the voltage signal; the force sensitive sensor 9 can accurately measure the strain change of the turbine blade 4 caused by the rotation.

[0038] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A turbine blade measuring device, comprising a metal sleeve (3) and a rotating shaft (2), characterized in that: A fan (1) is fixedly installed on the left side of the interior of the metal sleeve (3); a mounting seat (19) is fixedly installed on the right side of the interior front end wall of the metal sleeve (3) near the center; an ultrasonic probe (18) is fixedly installed on the rear end of the mounting seat (19); a mounting plate (12) is fixedly installed on the right side of the interior front end wall of the metal sleeve (3) near the center; an electromagnetic sensor (14) is fixedly installed on the rear end of the mounting plate (12); a soft magnetic core (13) is fixedly installed on the rear end of the electromagnetic sensor (14); a mounting box (10) is fixedly installed on the right side of the interior front end wall of the metal sleeve (3) near the center; a force sensitive sensor (9) is fixedly installed on the mounting box (10); a mobile power supply (11) is fixedly installed on the mounting box (10); a rectifier (8) is provided on the outer surface of the rotating shaft (2) near the left side; the metal sleeve (3) A slide rail (20) is fixedly installed on the inner wall near the center, a turbine blade (4) is fixedly connected to the outer surface of the rotating shaft (2) near the center, a limiting frame (17) is fixedly installed on the periphery of the outer surface of the turbine blade (4), a turbine guide (22) is fixedly installed on the inner portion of the limiting frame (17) near the left side, a bearing (22) is provided at the connection between the turbine guide (22) and the rotating shaft (2), a vibration sensor (21) is provided at the connection between the turbine guide (22) and the rotating shaft (2), a slider (15) is fixedly installed on the outer surface of the limiting frame (17), a nickel gear (6) is fixedly installed on the right side of the outer surface of the rotating shaft (2) near the center, a permanent magnet (5) is fixedly installed on the periphery of the outer surface of the nickel gear (6), and a strain gauge (7) is fixedly installed on the outer surface of the rotating shaft (2) near the right side.

2. A turbine blade measuring device according to claim 1, characterized in that: The outer surface of the slider (15) is movably sleeved with the interior of the slide rail (20).

3. The turbine blade measuring device according to claim 1, characterized in that: A stabilizing frame (16) is fixedly installed around the outer surface of the rectifier (8), the outer surface of the stabilizing frame (16) is fixedly connected to the inner wall of the metal sleeve (3), and the connection between the inner center of the rectifier (8) and the outer surface of the rotating shaft (2) is connected via a ball bearing.

4. The turbine blade measuring device according to claim 1, characterized in that: The sensing end of the ultrasonic probe (18) is adjacent to the turbine blade (4), but the turbine blade (4) and the ultrasonic probe (18) are not close to each other.

5. The turbine blade measuring device according to claim 1, characterized in that: The soft magnetic core (13) and the electromagnetic sensor (14) are both adjacent to the nickel gear (6), but the soft magnetic core (13) and the electromagnetic sensor (14) are not in contact with the nickel gear (6).

6. The turbine blade measuring device according to claim 1, characterized in that: A magnetic encoder is provided inside the installation box (10), and the installation box (10) is provided with a rotation speed detection system.

7. The turbine blade measuring device according to claim 1, characterized in that: The soft magnetic core (13) and the electromagnetic sensor (14) are electrically connected to a rotation speed detection system.

8. The turbine blade measuring device according to claim 1, characterized in that: The installation box (10) is signal-connected to a control box, and a signal control unit matching the vibration sensor (21) is provided in the control box to which the installation box (10) is signal-connected. The rotating shaft (2) is located inside the metal sleeve (3).

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