Automatic clamping mechanism for blade detection

Abstract

The utility model provides an automatic clamping mechanism for blade detection. The automatic clamping mechanism comprises a reciprocating driving device and a rotary driving device, the reciprocating driving device comprises a hollow hydraulic chuck and a chuck driver; the rotary driving device comprises a turntable bearing and a bearing driver; a fan blade supporting frame is arranged in the axial direction of the hollow hydraulic chuck, a plurality of clamping jaws of the hollow hydraulic chuck are evenly distributed relative to the fan blade supporting frame and connected with blade clamps through heightening stand columns, and the output end of the chuck driver penetrates through a rotating disc bearing of the reciprocating driving device and is connected with the hollow hydraulic chuck. The driving mechanism is used for driving the blade clamps to synchronously reciprocate in the direction of the fan blade supporting frame; the turntable bearing is arranged below the hollow hydraulic chuck, the hollow hydraulic chuck is connected with an outer ring disc of the turntable bearing, and the bearing driver drives the hollow hydraulic chuck to axially rotate through the transmission part.

Description

Technical Field

[0001] This utility model relates to the technical field, specifically to an automatic clamping mechanism for blade detection. Background Technology

[0002] During operation, turbine rotor blades not only withstand static stress from centrifugal force during high-speed rotation and dynamic stress from steam flow, but also endure high temperatures, corrosion, and erosion. If the turbine blades themselves have metallurgical manufacturing defects or the mechanical properties of the materials do not meet requirements, they are prone to developing cracks when external operating conditions change, leading to blade breakage accidents. Due to the large size and mass of the blades, if the blade root or blade body breaks, it will not only damage other blades but may also cause the rotor's dynamic balance to be disrupted due to the broken blade, resulting in shaft instability and ultimately a major safety accident. Therefore, the safe and stable operation of turbine blades directly affects the safety and economy of the entire unit, making it particularly important to strengthen the inspection of turbine blades.

[0003] In existing technologies, leaf retrieval is mostly done by scanning the leaf with a scanner, then creating a model based on the scan data, and finally comparing it with a standard model to determine whether it is qualified.

[0004] CN218865050U discloses a blade inspection device. Although it can fix the blade, after the scanner finishes scanning one side of the blade, it is necessary to open the bidirectional lead screw used for limiting, flip the blade to the other side that has not been scanned, and fix it again using the bidirectional lead screw before the scanner can scan the other side. This reduces the inspection efficiency, and the flipping of the blade also increases the workload of the workers. Utility Model Content

[0005] In view of this, the problem to be solved by this utility model is to provide an automatic clamping mechanism for blade detection.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0007] The automatic clamping mechanism for blade detection includes a reciprocating drive device and a rotary drive device;

[0008] The reciprocating drive device includes a hollow hydraulic chuck and a chuck driver;

[0009] The rotary drive includes a turntable bearing and a bearing driver;

[0010] The hollow hydraulic chuck is provided with a blade support frame in the axial direction. Several jaws of the hollow hydraulic chuck are evenly arranged about the blade support frame and connected to blade clamps through the heightened column. The output end of the chuck driver passes through the turntable bearing of the reciprocating drive device and is connected to the hollow hydraulic chuck to drive several blade clamps to reciprocate synchronously along the direction of the blade support frame.

[0011] The slewing bearing is located below the hollow hydraulic chuck. The hollow hydraulic chuck is connected to the outer ring of the slewing bearing. The bearing driver drives the hollow hydraulic chuck to rotate axially through a transmission component.

[0012] The blade clamp has a wavy surface structure at the facing end.

[0013] The blade clamp is mounted on the heightening column via a pneumatically controlled chuck, and the blade clamp is set parallel to the heightening column.

[0014] The clamping mechanism also includes a mounting frame, which includes a base plate and an annular plate constructed above the base plate by vertical support columns. The inner ring of the turntable bearing is fixedly connected to the annular plate.

[0015] The transmission component is a gear, and the outer circumferential surface of the outer ring of the turntable bearing is provided with teeth that are adapted to the gear. The gear is installed on the output end of the chuck driver and meshes with the outer ring.

[0016] The outer ring of the turntable bearing is axially connected to a target island fixing plate via a vertical support rod, and the target island fixing plate is fitted onto the outside of the hollow hydraulic chuck.

[0017] Several target islands are arranged around the hollow hydraulic chuck on the target island fixing plate.

[0018] The advantages and positive effects of this utility model are:

[0019] The chuck and heightening column are controlled by a rotary hydraulic cylinder to automatically clamp the blade root. The pneumatically controlled chuck ensures the consistency of the relative position of the workpiece during each measurement, keeping the angular deviation within a very small range. The motor drives the chuck to rotate through the outer ring of the turntable bearing and can precisely control the rotation angle, thus eliminating the need for manual flipping. This greatly improves scanning efficiency and overall measurement accuracy, making the measurement data more accurate and reliable, and providing precise basis for subsequent quality assessment and process improvement. Attached Figure Description

[0020] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0021] Figure 1This is an overall structural diagram of the automatic clamping mechanism for blade detection of this utility model;

[0022] Figure 2 This is a diagram showing the positional relationship of the jaws in the automatic clamping mechanism for blade detection of this utility model;

[0023] Figure 3 This is a first-view internal structure diagram of the automatic clamping mechanism for blade detection of this utility model;

[0024] Figure 4 This is an internal structural diagram of the automatic clamping mechanism for blade detection of this utility model from a second perspective.

[0025] In the diagram: blade clamp 1, pneumatic chuck 2, heightening column 3, fan blade support frame 4, target island fixing plate 6, target island 7, hollow hydraulic chuck 11, turntable bearing 12, rotary hydraulic cylinder 13, motor 16, chuck claw 17, vertical support column 19, base plate 20, annular plate 21, gear 23. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] It should be noted that when a device is described as being "fixed to" another device, it can be directly attached to the other device or may have an intervening device. When a device is described as being "connected to" another device, it can be directly connected to the other device or may have an intervening device. When a device is described as being "set on" another device, it can be directly set on the other device or may have an intervening device. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0029] like Figures 1 to 4 As shown, this utility model provides an automatic clamping mechanism for blade detection, including a reciprocating drive device and a rotary drive device;

[0030] The reciprocating drive device includes a hollow hydraulic chuck 11 and a chuck driver;

[0031] The hollow hydraulic chuck 11 and the chuck driver are rotary hydraulic cylinders 13 that drive the jaws 17 of the hollow hydraulic chuck 11 to move. The output end of the rotary hydraulic cylinder 13 passes through the turntable bearing 12 of the reciprocating drive device and is connected to the hollow hydraulic chuck 11 to drive the jaws 17 on the hollow hydraulic chuck 11 to move. Both are existing standard parts, so they will not be described in detail here.

[0032] The rotary drive device includes a turntable bearing 12 and a bearing driver, wherein the bearing driver is a motor 16;

[0033] The hollow hydraulic chuck 11 is provided with a blade support frame 4 in the axial direction. The blade support frame 4 is used to store the blade to be tested. Several jaws 17 of the hollow hydraulic chuck 11 are evenly distributed about the blade support frame 4 and connected to the blade clamp 1 through the heightening column 3. The bottom end of the heightening column 3 is fixed on the jaws 17, so that the blade clamp 1 can be moved synchronously with the displacement of the jaws 17. The heightening column 3 is used to match the height of the blade so that the blade clamp 1 and the root of the blade are at the same height position.

[0034] In this embodiment, a hollow hydraulic chuck 11 with two sets of jaws 17 is selected. The two sets of jaws 17 are symmetrically arranged about the radial center line in the radial direction of the hollow hydraulic chuck 11. The two sets of jaws 17 of the hollow hydraulic chuck 11 are driven to move relative to each other or back to back by a rotary hydraulic cylinder 13, so that the blade clamp 1 can clamp or release the root of the blade.

[0035] The slewing bearing 12 is located below the hollow hydraulic chuck 11. The hollow hydraulic chuck 11 is fixedly connected to the outer ring of the slewing bearing 12. The bearing driver drives the outer ring of the slewing bearing 12 to rotate through the transmission component, thereby causing the hollow hydraulic chuck 11, which is fixedly connected to the outer ring, to rotate axially.

[0036] Specifically, the blade clamp 1 has a wave-like structure on its facing end, with the wave crests gradually increasing in the vertical direction along the direction close to the blade support frame 4, in order to accommodate blades of different specifications and models.

[0037] Specifically, the blade clamp 1 is mounted on the heightening column 3 via a pneumatic chuck 2. The pneumatic chuck 2 is a standard component of existing technology. The blade clamp 1 is set parallel to the heightening column 3. The blade clamp 1 is fixedly connected to the telescopic output end of the pneumatic chuck 2, and the bottom end of the pneumatic chuck 2 is fixedly connected to the heightening column 3. This ensures the consistency of the relative position of the blade clamp 1 during each measurement, controls the angle deviation within a very small range, and thus improves the overall accuracy of the measurement.

[0038] Specifically, the clamping mechanism also includes a mounting frame, which includes a base plate 20 and an annular plate 21 constructed above the base plate 20 via vertical support columns 19. The inner ring of the turntable bearing 12 is fixedly connected to the annular plate 21. The rotary hydraulic cylinder 13 is located between the annular plate 21 and the base plate 20. The turntable bearing 12 and the hollow hydraulic chuck 11 are located above the annular plate 21. The output end of the rotary hydraulic cylinder 13 passes through the annular plate 21 and the turntable bearing 12 and is connected to the hollow hydraulic chuck 11.

[0039] Specifically, it also includes pressure gauges and flow meters. The pressure gauges and flow meters are installed on the corresponding pipelines of the hydraulic cylinder's liquid supply system and the pneumatic chuck's air supply system, respectively. Operators can intuitively understand the current pressure status of the hydraulic cylinder by observing the pressure gauge readings, ensuring that the pressure is within the set safe range and normal working range. If abnormal pressure fluctuations occur, the fault can be detected and troubleshooted in a timely manner.

[0040] The flow meter is mainly used to accurately check the flow rate of the air supply system of the pneumatic chuck. After the flow data is fed back to the control system, it can help determine whether there is an air leak and ensure the tight connection between the pneumatic chuck and the clamp.

[0041] Specifically, the transmission component is a gear 23, and the outer circumferential surface of the outer ring of the turntable bearing 12 is provided with teeth that are compatible with the gear 23. The gear 23 is mounted on the output end of the motor 16 and meshes with the outer ring.

[0042] Specifically, the outer ring of the turntable bearing 12 is connected to a target island fixing plate 6 in the axial direction by a vertical support rod. The target island fixing plate 6 is fitted on the outside of the hollow hydraulic chuck 11, and several target islands 7 are arranged around the hollow hydraulic chuck 11 on the target island fixing plate 6.

[0043] The target island is a standard component of existing technology. The position of the target island is only used to locate the spatial position of the scanner's tracking head, and is used in conjunction with the scanner's scanning modeling.

[0044] The working principle and process of this utility model are as follows:

[0045] When blade inspection is required, first place the blade on the blade support frame 4, then activate the pneumatic chuck 2 to ensure that the blade clamp 1 is tightly attached to the top surface of the pneumatic chuck 2, ensuring the consistency of the relative height of the blade clamp 1 during each measurement. Then activate the rotary hydraulic cylinder 13, which drives the two sets of jaws 17 on the pneumatic chuck 2 to move towards each other. The two sets of jaws 17 synchronously drive the blade clamp 1 to move towards each other through the heightening column 3, thereby clamping the root of the blade between the two sets of blade clamps 1. Then activate the motor 16, whose output end drives the outer ring of the turntable bearing to rotate through the gear 23. The outer ring is connected to the pneumatic chuck 2 and the target island fixing plate 6, thereby synchronously driving the blade and target island 7 on the pneumatic chuck 2 to rotate. Finally, activate the scanner to perform scanning.

[0046] The embodiments of this utility model have been described in detail above, but the content described is only a preferred embodiment of this utility model and should not be considered as limiting the scope of implementation of this utility model. All equivalent changes and improvements made within the scope of this utility model should still fall within the scope of this patent.

Claims

1. An automatic clamping mechanism for blade detection, characterized in that, Including reciprocating drive devices and rotary drive devices; The reciprocating drive includes a hollow hydraulic chuck (11) and a chuck driver; The rotary drive includes a turntable bearing (12) and a bearing driver; The hollow hydraulic chuck (11) is provided with a blade support frame (4) in the axial direction. Several jaws (17) of the hollow hydraulic chuck (11) are evenly arranged about the blade support frame (4) and connected to blade clamps (1) through the heightening column (3). The output end of the chuck driver passes through the turntable bearing (12) of the reciprocating drive device and is connected to the hollow hydraulic chuck (11) to drive several blade clamps (1) to reciprocate synchronously along the direction of the blade support frame (4). The slewing bearing (12) is located below the hollow hydraulic chuck (11). The hollow hydraulic chuck (11) is connected to the outer ring of the slewing bearing (12). The bearing driver drives the hollow hydraulic chuck (11) to rotate axially through the transmission component.

2. The automatic clamping mechanism for blade detection according to claim 1, characterized in that, The blade clamp (1) has a wave-shaped surface structure on its facing end.

3. The automatic clamping mechanism for blade detection according to claim 1, characterized in that, The blade clamp (1) is mounted on the heightening column (3) via a pneumatic chuck (2), and the blade clamp (1) is set parallel to the heightening column (3).

4. The automatic clamping mechanism for blade detection according to claim 1, characterized in that, The clamping mechanism also includes a mounting frame, which includes a base plate (20) and an annular plate (21) constructed above the base plate (20) by a vertical support column (19), and the inner ring of the turntable bearing (12) is fixedly connected to the annular plate (21).

5. The automatic clamping mechanism for blade detection according to claim 4, characterized in that, The transmission component is a gear (23). The outer circumferential surface of the outer ring of the turntable bearing (12) is constructed with teeth that are compatible with the gear (23). The gear (23) is installed on the output end of the chuck driver and meshes with the outer ring.

6. The automatic clamping mechanism for blade detection according to claim 1, characterized in that, The outer ring of the turntable bearing (12) is connected to a target island fixing plate (6) in the axial direction by a vertical support rod. The target island fixing plate (6) is fitted on the outside of the hollow hydraulic chuck (11).

7. The automatic clamping mechanism for blade detection according to claim 1, characterized in that, Several target islands (7) are arranged around the hollow hydraulic chuck (11) on the target island fixing plate (6).

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