A device for measuring three-dimensional twist of a blade of an impeller

Abstract

The application provides a kind of impeller blade three-dimensional torsion degree profile measuring device, it relates to impeller measuring technical field, including: impeller measuring table, the rotary support is movably connected above the impeller measuring table, the bottom of the impeller measuring table is connected with the direction adjusting motor by screw, the rotating shaft of direction adjusting motor is fixedly connected with the bottom center of rotary support, the impeller insertion column is fixedly connected above the rotary support, the right edge of the upper surface of the impeller measuring table is fixedly connected with the measuring support, the circular arc motion trajectory makes scanning probe after entering the curved gap formed by adjacent blades, its advancing direction can comply with the natural arc of flow channel, reduces the possibility that probe body and blade profile occur hard contact on motion path, thereby protects probe structure and blade working surface at source, solves the problem that the posture and position of probe cannot be flexibly adjusted along with curved surface channel after entering curved flow channel, is easy to knock or scratch inside and blade surface.

Description

Technical Field

[0001] This invention relates to the field of impeller measurement technology, and in particular to a device for measuring the three-dimensional torsion of impeller blades. Background Technology

[0002] The accurate measurement of the three-dimensional torsion of impeller blades is a key link in ensuring the performance and safety of core components such as aero engines and gas turbines. During the measurement, a motion platform is needed to insert the scanning probe into the narrow gap formed by adjacent blades, so that the probe can be close to the blade profile to complete the scanning measurement.

[0003] However, impeller blades are mostly complex three-dimensional curved surface structures, and the gap channels between adjacent blades are also curved. Current measuring devices usually use a linear feed method to push the probe into the gap. After the probe enters the curved flow channel, its posture and position cannot be flexibly adjusted with the curved surface channel, and it is easy to bump or scratch the blade surface inside. This not only directly threatens the safety of the precision probe, but also wears down the working surface of the blade, thus affecting the overall service life of the impeller. Summary of the Invention

[0004] This invention provides a device for measuring the three-dimensional torsion of impeller blades, addressing the problem that impeller blades are often complex three-dimensional curved surface structures, and the gap channels between adjacent blades are also curved. Current measuring devices typically use a linear feed method to push the probe into the gap. After entering the curved flow channel, the probe's posture and position cannot be flexibly adjusted with the curved surface channel, making it prone to collisions or scratches with the blade surface inside. This not only directly threatens the safety of the precision probe but also wears down the working surface of the blade, thus affecting the overall service life of the impeller.

[0005] This invention provides a device for measuring the three-dimensional torsion of impeller blades, specifically comprising: an impeller measuring platform; a rotating support movably connected above the impeller measuring platform; a directional motor connected to the bottom of the impeller measuring platform by screws; the rotating shaft of the directional motor fixedly connected to the bottom center of the rotating support; an impeller insert fixedly connected above the rotating support; a measuring bracket fixedly connected to the right edge of the upper surface of the impeller measuring platform; a slotting drive component connected to the rear surface of the measuring bracket by screws; the slotting drive component connected to and driving a rotating disk; a probe guide fixedly connected through the rotating disk; and a support rod for a scanning probe slidably connected inside the probe guide; a motion platform assembly provided on the upper left edge of the impeller measuring platform; the motion platform assembly connected to and driving a horizontal push rod; a rotating swing plate rotatably connected to the right end of the horizontal push rod via a bearing; and a linkage push wheel rotatably connected to the right side of the rotating swing plate; the surface of the linkage push wheel having a push wheel wedge groove.

[0006] Furthermore, the probe tube wall has a tube opening, and the outer wall of the scanning probe support has a probe tooth surface, with the probe tooth surface facing the tube opening.

[0007] Furthermore, a scaling drive is fixedly connected to the front of the rotating disk, and a scaling wheel is fixedly connected to the rotating shaft of the scaling drive. A wheel tooth ring is protruding from the center of the wheel surface of the scaling wheel. The wheel tooth ring is located inside the guide tube opening and meshes with the probe tooth surface.

[0008] Furthermore, the rotating disk has a scaling gear cavity inside, the rotating wheel gear ring is located inside the scaling gear cavity, and a gear cover is fixedly connected above the rotating disk, covering the scaling rotating wheel.

[0009] Furthermore, the motion platform assembly includes a vertical motion platform and a horizontal motion platform. The vertical motion platform is vertically fixedly connected above the impeller measuring platform, and the horizontal motion platform is vertically fixedly connected to the right side of the slider of the vertical motion platform. The horizontal motion platform is parallel to the upper surface of the impeller measuring platform.

[0010] Furthermore, a motion push plate is fixedly connected below the slider of the horizontal motion platform.

[0011] Furthermore, the lower end of the moving push plate is provided with a push plate guide, and the horizontal push rod is slidably connected inside the push plate guide.

[0012] Furthermore, a push rod end plate is fixedly connected to the left end of the horizontal push rod, and a push rod tension spring is movably sleeved on the outside of the horizontal push rod.

[0013] Furthermore, the left end of the push rod tension spring is fixedly connected to the push rod end plate, and the right end of the push rod tension spring is fixedly connected to the moving push plate.

[0014] Furthermore, a reset magnetic block one is fixedly connected to the upper right edge of the horizontal push rod, and a reset flange is provided on the top of the rotating plate when it is bent to the left. A reset magnetic block two is fixedly connected below the reset flange, and the reset magnetic block two is magnetically connected to the reset magnetic block one.

[0015] This invention provides a device for measuring the three-dimensional torsion of impeller blades, which has the following advantages: This invention uses a slot-driving component to drive a rotating disc to rotate around a fixed axis, causing the detection guide tube and scanning probe to sweep across the outer arc surface of the blade along an arc trajectory. This ensures that the insertion direction of the detection guide tube is always coordinated with the curvature change of the outer arc surface of the blade. Compared with the existing linear insertion scheme, the arc motion trajectory allows the scanning probe to follow the natural curvature of the flow channel after entering the curved gap formed by adjacent blades. This reduces the possibility of hard contact between the probe body and the blade surface from the motion path, thereby protecting the probe structure and the working surface of the blade from the source.

[0016] Furthermore, a scaling drive mechanism rotates a scaling wheel, which, through the meshing of the wheel's gear ring and the probe's tooth surface, allows for controllable extension and retraction of the scanning probe's probe rod along the detection guide, enabling segmented detection at different depths within the same gap. Once the rotating disk's position is calibrated and fixed, the probe rod's extension and retraction alone can cover the measurement needs of different sections of the blade gap from the inlet to the deeper layers. During shallow measurements, the probe rod shortens to ensure rigidity, while during deep measurements, it extends to reach the target position. This eliminates the need for repeated movement or re-clamping of the rotating disk due to depth changes, effectively reducing setup and adjustment steps and balancing positioning reliability with measurement flexibility.

[0017] Furthermore, during the measurement operation, the vertical and horizontal motion platforms in the motion platform assembly work together to drive the horizontal push rod and the rotating pendulum to rise and fall synchronously with the scanning probe. As the scanning probe descends along an arc trajectory, the rotating pendulum moves downward accordingly. Through the sliding engagement between the push wheel wedge groove on the linkage push wheel and the blade edge, the groove constraint applies a slight circumferential movement to the blade, causing the impeller to slowly rotate around the rotating support. This ensures that the scanning probe remains dynamically in the middle area of ​​the gap between adjacent blades throughout the entire descent, preventing the probe from being biased to one side of the blade surface due to the fixed position of the impeller, thereby reducing contact wear during the measurement process. After completing the measurement of a single blade, the horizontal motion platform drives the horizontal push rod and the rotating pendulum to retract. The scanning probe retracts and resets through the scaling drive, and the directional motor drives the rotating support to rotate to the next blade position, allowing the scanning of the new blade to continue. The entire set of actions is seamlessly connected, realizing continuous automated measurement of multiple blades. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments will be briefly described below.

[0019] The accompanying drawings described below are only related to some embodiments of the invention and are not intended to limit the invention.

[0020] In the attached diagram: Figure 1 A schematic diagram of the overall structure of this application is shown; Figure 2 This is a schematic diagram of the structure from the left perspective of this application; Figure 3 A schematic diagram of the structure of the measuring bracket of this application is shown; Figure 4 A schematic diagram of the scanning probe of this application is shown; Figure 5 This diagram illustrates the structure of the scanning probe when it rotates according to this application. Figure 6 A schematic diagram of the structure of the horizontal push rod of this application is shown; Figure 7A schematic diagram of the rotating pendulum plate of this application is shown; Figure 8 A schematic diagram of the pusher wedge groove of this application is shown; Figure 9 A schematic diagram of the push plate guide of this application is shown; Figure 10 This application shows Figure 9 A structural diagram from the left perspective; Figure 11 A schematic diagram of the impeller insert structure of this application is shown; Figure 12 A schematic diagram of the impeller measuring platform of this application is shown; Figure 13 This application shows Figure 3 A magnified structural diagram of point A.

[0021] Figure label: 1. Impeller measuring platform; 2. Directional motor; 3. Rotating support; 301. Impeller insert; 4. Measuring bracket; 5. Through-slit drive; 501. Rotary disk; 502. Probe guide tube; 503. Guide tube opening; 504. Scaling gear cavity; 505. Gear cover; 6. Scaling drive; 601. Scaling wheel; 602. Wheel gear ring; 7. Scanning probe; 701. Probe tooth surface; 8. Motion platform assembly; 801. Vertical motion platform; 802. Horizontal motion platform; 803. Motion push plate; 804. Push plate guide; 9. Horizontal push rod; 901. Push rod end plate; 902. Push rod tension spring; 903. Reset magnet one; 10. Rotating swing plate; 1001. Reset flange; 1002. Reset magnet two; 1003. Linkage push wheel; 1004. Push wheel wedge groove. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the described embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Example 1: Please refer to Figures 1 to 13 : This invention proposes a device for measuring the three-dimensional torsion of impeller blades, comprising: an impeller measuring platform 1, a rotating support 3 movably connected above the impeller measuring platform 1, a directional motor 2 connected to the bottom of the impeller measuring platform 1 by screws, the shaft of the directional motor 2 being fixedly connected to the bottom center of the rotating support 3, an impeller insert 301 fixedly connected above the rotating support 3, a measuring bracket 4 fixedly connected to the right edge of the upper surface of the impeller measuring platform 1, a slot drive 5 connected to the rear surface of the measuring bracket 4 by screws, the slot drive 5 connecting to and driving a rotating disk 501, a probe guide 502 fixedly connected through the rotating disk 501, and a support rod of a scanning probe 7 slidably connected inside the probe guide 502; a motion platform assembly 8 is provided on the upper left edge of the impeller measuring platform 1, the motion platform assembly 8 connecting to and driving a horizontal push rod 9. The right end of the device is rotatably connected to a rotating swing plate 10 via a bearing. A linkage pusher 1003 is rotatably connected to the right side of the rotating swing plate 10. The wheel surface of the linkage pusher 1003 is provided with a pusher wedge groove 1004. The impeller measuring platform 1 serves as the basic support body. The rotating support platform 3 is driven to rotate by the directional motor 2 above. The impeller to be measured is positioned and installed on the rotating support platform 3 via the impeller insert 301, realizing the switching of the blade position. The impeller is placed above the rotating support platform 3. The impeller insert 301 movably passes through the impeller assembly hole, allowing the impeller to rotate above the rotating support platform 3. The measuring bracket 4 on the right provides the installation base for the through-slot drive component 5. The through-slot drive component 5 drives the rotating disk 501 to rotate around a fixed axis, so that the probe guide 502 and the internal sliding scanning probe 7, which are fixed inside the rotating disk 501, can sweep the blade profile along an arc trajectory. The motion platform group 8 on the left is responsible for driving the horizontal push rod 9 and the rotating pendulum 10. Through the linkage push wheel 1003 and the blade edge, the impeller attitude is finely adjusted in real time during the measurement process.

[0024] In this embodiment, the probe tube 502 has a tube opening 503 in its wall, and the outer wall of the support rod of the scanning probe 7 has a probe tooth surface 701 facing the tube opening 503. A scaling drive 6 is fixedly connected to the front of the rotating disk 501, and a scaling wheel 601 is fixedly connected to the shaft of the scaling drive 6. A wheel tooth ring 602 is protruding from the center of the wheel surface of the scaling wheel 601. The wheel tooth ring 602 is located inside the tube opening 503 and meshes with the probe tooth surface 701. A scaling gear cavity 504 is opened inside the rotating disk 501, and the wheel tooth ring 602 is located inside the scaling gear cavity 504. A gear cover 505 is fixedly connected above the rotating disk 501 and covers the scaling wheel 601. The tube opening 503 in the wall of the probe tube 502 provides a transmission channel for gear meshing, and the probe tooth surface 701 on the outer wall of the support rod of the scanning probe 7 is arranged facing the opening. When the scaling drive 6 drives the scaling wheel 601 to rotate, the wheel gear ring 602, protruding from the center of the scaling wheel 601, passes through the guide tube opening 503 and enters the scaling gear cavity 504, forming a meshing transmission with the probe tooth surface 701. This converts the rotational motion into linear extension and retraction of the scanning probe 7 rod along the detection guide tube 502. The gear cover 505 above the rotating disk 501 covers the scaling wheel 601, providing dust protection and ensuring the cleanliness and operational reliability of the gear transmission part.

[0025] In this embodiment, the motion platform assembly 8 includes a vertical motion platform 801 and a horizontal motion platform 802. The vertical motion platform 801 is vertically fixedly connected above the impeller measuring platform 1, and the horizontal motion platform 802 is vertically fixedly connected to the right side of the slider of the vertical motion platform 801. The horizontal motion platform 802 is parallel to the upper surface of the impeller measuring platform 1. A motion push plate 803 is fixedly connected below the slider of the horizontal motion platform 802. A push plate guide 804 is opened at the lower end of the motion push plate 803. A horizontal push rod 9 is slidably connected inside the push plate guide 804. A push rod end plate 901 is fixedly connected to the left end of the horizontal push rod 9. A push rod tension spring 902 is movably sleeved on the outside of the horizontal push rod 9. The left end of the push rod tension spring 902 is fixedly connected to the push rod end plate 901, and the right end of the push rod tension spring 902 is fixedly connected to the motion push plate 803. The motion platform assembly 8 consists of the vertical motion platform 801 and the horizontal motion platform 802, which are installed perpendicularly to each other, providing vertical and horizontal motion capabilities respectively. The lower end of the motion push plate 803, which is fixed below the slider of the horizontal motion platform 802, has a push plate guide 804. The horizontal push rod 9 slides through the guide 804, forming a relatively slidable connection. The push rod end plate 901 at the left end of the horizontal push rod 9 is elastically connected to the motion push plate 803 through a push rod tension spring 902. When the front end of the rotating swing plate 10 is subjected to force, the horizontal push rod 9 can generate buffer sliding within the push plate guide 804. The push rod tension spring 902 provides elastic restoring force, so that the linkage push wheel 1003 maintains flexible contact with the blade edge, avoiding hard pressure damage to the blade.

[0026] In Example 2, based on Example 1, a reset magnetic block 903 is fixedly connected to the upper right edge of the horizontal push rod 9. A reset flange 1001 is formed by bending the top of the rotating swing plate 10 to the left. A reset magnetic block 1002 is fixedly connected below the reset flange 1001, and the reset magnetic block 1002 is magnetically attracted to the reset magnetic block 903. The reset magnetic block 903 fixed to the upper right edge of the horizontal push rod 9 and the reset magnetic block 1002 fixed below the reset flange 1001 on the top of the rotating swing plate 10 are aligned with each other, and the two form a separable fixed position through magnetic attraction. In operation, the magnetic attraction keeps the rotating pendulum 10 at a preset initial angle, ensuring that the pusher wedge groove 1004 of the linkage pusher 1003 can be accurately aligned with the blade edge. When the pusher wedge groove 1004 rolls to the tilt position of the blade, the rotating pendulum 10 rotates at an appropriate angle, and the magnetic attraction can disengage under a certain torque. After the linkage pusher 1003 separates from the blade, the rotating pendulum 10 can automatically return to its original position under the magnetic attraction of the reset magnetic block 1 903 and the reset magnetic block 2 1002, which improves the fault tolerance and reset convenience of the device operation.

[0027] The working principle of this embodiment is as follows: Before measurement, the impeller to be measured is placed above the rotating support 3, and the impeller hole is movably connected to the impeller insertion post 301, so that the impeller can be rotatably placed above the rotating support 3. When the measurement starts, the through-slot drive 5 drives the rotating disk 501 to rotate around the fixed axis, which drives the detection guide tube 502 and the scanning probe 7 to probe into the curved gap formed by the adjacent blades from above the outer arc surface of the blade along an arc trajectory. The arc motion path follows the natural curvature of the impeller side, so that the scanning probe 7 can be close to the blade profile for scanning after entering the gap. When it is necessary to measure different depth positions in the same gap, the scaling drive 6 drives the scaling wheel 601 to rotate. The wheel tooth ring 602 meshes with the probe tooth surface 701, which drives the probe rod of the scanning probe 7 to extend and retract along the detection guide tube 502. Under the condition that the position of the rotating disk 501 remains fixed, segmented depth detection is achieved. At the same time, the vertical motion platform 801 in the motion platform group 8 drives the horizontal push rod 9 and the rotating swing plate 10 to follow the scan. The probe 7 rises and falls synchronously. The linkage push wheel 1003 at the front end of the rotating plate 10 is clamped to the edge of the blade through the push wheel wedge groove 1004. When the rotating plate 10 descends, the push wheel wedge groove 1004 slides with the edge of the blade, applying a small circumferential pushing force to the blade, causing the impeller to rotate slowly around the rotating support 3. This keeps the scanning probe 7 dynamically in the middle area of ​​the gap between adjacent blades throughout the entire descent, avoiding contact wear between the probe and the blade surface. The horizontal push rod 9 and the moving push plate 803 form an elastic buffer through the push rod tension spring 902, keeping the linkage push wheel 1003 in flexible contact with the edge of the blade rather than hard pressing, protecting the working surface of the blade. After the measurement of a single blade is completed, the horizontal moving platform 802 drives the horizontal push rod 9 and the rotating plate 10 to retract. The scanning probe 7 retracts and resets under the action of the scaling drive 6. The directional motor 2 drives the rotating support 3 to rotate to the next blade position, so that the scanning measurement of the new blade can continue. This cycle realizes continuous automated detection of multiple blades.

[0028] The following points should be noted in this article: 1. The accompanying drawings of the embodiments disclosed herein only relate to the structures involved in the embodiments disclosed herein; other structures can be referred to in a general design.

[0029] 2. Where there is no conflict, the embodiments of this disclosure and the features in the embodiments can be combined with each other to obtain new embodiments.

[0030] The above are merely specific embodiments of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. A device for measuring the three-dimensional torsion of impeller blades, comprising: An impeller measuring platform (1) is provided, with a rotating support platform (3) movably connected above it. A directional motor (2) is connected to the bottom of the impeller measuring platform (1) by screws. The shaft of the directional motor (2) is fixedly connected to the center of the bottom of the rotating support platform (3). An impeller insert (301) is fixedly connected above the rotating support platform (3). The impeller measuring platform (1) is characterized in that a measuring bracket (4) is fixedly connected to the right edge of the upper surface of the impeller measuring platform (1), and a slotting drive component (5) is connected to the rear surface of the measuring bracket (4) by screws. The slotting drive component (5) is connected to and drives the impeller. A rotating disk (501) is fixedly connected inside the rotating disk (501), and a support rod of a scanning probe (7) is slidably connected inside the detection guide tube (502); a motion platform group (8) is provided on the upper left edge of the impeller measuring table (1), the motion platform group (8) is connected to and drives a horizontal push rod (9), the right end of the horizontal push rod (9) is rotatably connected to a rotating swing plate (10) through a bearing, and a linkage push wheel (1003) is rotatably connected to the right side of the rotating swing plate (10), and a push wheel wedge groove (1004) is opened on the wheel surface of the linkage push wheel (1003).

2. The impeller blade three-dimensional torsion airfoil measuring device according to claim 1, characterized in that, The probe tube (502) has a tube opening (503) on its wall, and the outer wall of the support rod of the scanning probe (7) has a probe tooth surface (701) facing the tube opening (503).

3. The impeller blade three-dimensional torsion airfoil measuring device according to claim 2, characterized in that, A scaling drive (6) is fixedly connected to the front of the rotating disk (501). A scaling wheel (601) is fixedly connected to the shaft of the scaling drive (6). A wheel tooth ring (602) is protruding from the center of the wheel surface of the scaling wheel (601). The wheel tooth ring (602) is located inside the conduit opening (503), and the wheel tooth ring (602) meshes with the probe tooth surface (701).

4. The impeller blade three-dimensional torsion airfoil measuring device according to claim 3, characterized in that, The rotating disk (501) has a scaling gear cavity (504) inside, and the rotating wheel gear ring (602) is located inside the scaling gear cavity (504). A gear cover (505) is fixedly connected above the rotating disk (501), and the gear cover (505) covers the scaling rotating wheel (601).

5. The impeller blade three-dimensional torsion airfoil measuring device according to claim 1, characterized in that, The motion platform group (8) includes a vertical motion platform (801) and a horizontal motion platform (802). The vertical motion platform (801) is vertically fixed above the impeller measuring table (1), and the horizontal motion platform (802) is vertically fixed to the right of the slider of the vertical motion platform (801). The horizontal motion platform (802) is parallel to the upper surface of the impeller measuring table (1).

6. The impeller blade three-dimensional torsion airfoil measuring device according to claim 5, characterized in that, A motion push plate (803) is fixedly connected below the slider of the horizontal motion platform (802).

7. The impeller blade three-dimensional torsion airfoil measuring device according to claim 6, characterized in that, The lower end of the motion push plate (803) is provided with a push plate guide (804), and the horizontal push rod (9) is slidably connected inside the push plate guide (804).

8. The impeller blade three-dimensional torsion airfoil measuring device according to claim 6, characterized in that, The left end of the horizontal push rod (9) is fixedly connected to a push rod end plate (901), and a push rod tension spring (902) is movably sleeved on the outside of the horizontal push rod (9).

9. The impeller blade three-dimensional torsion airfoil measuring device according to claim 8, characterized in that, The left end of the push rod tension spring (902) is fixedly connected to the push rod end plate (901), and the right end of the push rod tension spring (902) is fixedly connected to the motion push plate (803).

10. The impeller blade three-dimensional torsion airfoil measuring device according to claim 1, characterized in that, The upper right edge of the horizontal push rod (9) is fixedly connected to a reset magnetic block one (903), the top of the rotating swing plate (10) is bent to the left and a reset flange (1001) is provided, and a reset magnetic block two (1002) is fixedly connected below the reset flange (1001). The reset magnetic block two (1002) and the reset magnetic block one (903) are magnetically connected.

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