Blade root measuring device of steam turbine blade

Abstract

The utility model relates to the technical field of turbine blade detection, in particular to a blade root measuring device of a turbine blade. According to the technical scheme, the device comprises a workbench, a shell is fixedly installed at the top of the workbench, a box door is hinged to the front face of the shell, a data processing screen is fixedly installed on the front face of the shell, an arc-shaped plate is fixedly installed on the inner wall of the top of the shell, a plurality of measuring probes are evenly and fixedly installed at the bottom of the arc-shaped plate, and the measuring probes are connected with the data processing screen through wires; a mounting frame is fixedly mounted at the top of the workbench and located in the shell, a fixing assembly is rotationally mounted on the front face of the mounting frame, and an overturning assembly used for driving the fixing assembly to overturn is arranged on the rear side of the shell. According to the utility model, the blade top of the blade can be pressed and fixed quickly, the blade root of the blade is prevented from being shielded, the blade can be turned over automatically, the blade root of the blade can be measured in all directions, and the measurement effect is improved.

Description

Technical Field

[0001] This utility model relates to the field of turbine blade testing technology, and in particular to a turbine blade root measuring device. Background Technology

[0002] Steam turbine blades consist of three parts: blade root, blade profile, and blade tip. The blade root is the part where the blade connects to the rim and has various shapes. Blade root inspection is an essential and crucial process. Currently, the blade root is generally measured using a probe.

[0003] In the prior art, patent publication number CN213022983U discloses an ultrasonic phased array detection device for turbine blade roots, including a housing. Mounting seats are fixedly connected to the left and right sides of the lower end of the housing, and mounting holes are provided on the mounting seats. A feed inlet is provided on one side wall of the housing, and a discharge outlet is provided on the other side wall. A track is provided between the feed inlet and the discharge outlet. A motor box is installed at the lower end of the housing, and a track motor is installed inside the motor box. A door is installed in the middle of one end wall of the housing. This ultrasonic phased array monitoring device for turbine blade roots allows the turbine blade roots to be placed into the device along with the feed inlet. The track rotates, transporting the blade roots to the underside of the monitoring probe. A hydraulic rod is activated, pushing a pressure plate downwards to fix the blades on the track. This facilitates the fixation of the blade roots, the automatic transmission of the blade roots, the automated operation of the monitoring, and the convenient use of the device for monitoring blade roots.

[0004] Although the aforementioned ultrasonic phased array detection device for turbine blade roots can achieve the effect of fixing turbine blades through hydraulic rods and pressure plates, it still has the following shortcomings in practical applications: it is very easy to block the blade root when fixing the blade; in addition, the blade cannot rotate, which means that the detection device can only scan and detect one side of the blade root, resulting in poor measurement results. Utility Model Content

[0005] The purpose of this invention is to address the problems existing in the background technology by proposing a turbine blade root measuring device.

[0006] To achieve this objective, the present invention adopts the following technical solution: a turbine blade root measuring device, comprising a workbench, a housing fixedly installed on the top of the workbench, a door hinged to the front of the housing, a data processing screen fixedly installed on the front of the housing, an arc-shaped plate fixedly installed on the inner wall of the top of the housing, a plurality of measuring probes evenly fixedly installed on the bottom of the arc-shaped plate, and the measuring probes being wiredly connected to the data processing screen, a mounting frame fixedly installed on the top of the workbench, and the mounting frame being located inside the housing, a fixing component being rotatably installed on the front of the mounting frame, and a flipping component for driving the fixing component to flip on the rear side of the housing.

[0007] Preferably, the fixing component includes a turntable rotatably mounted on the front of the mounting bracket, and a fixing bracket is fixedly mounted on the front of the turntable.

[0008] Preferably, a pressing plate is slidably installed inside the fixing frame, and a clamping bolt is threaded on the top wall of the fixing frame, with the bottom end of the clamping bolt rotatably connected to the top of the pressing plate.

[0009] Preferably, flexible pads are fixedly installed on the bottom of the pressing plate and the inner wall of the bottom wall of the fixing frame.

[0010] Preferably, the flipping assembly includes a rack slidably mounted on the inner rear wall of the housing, and a cylinder is fixedly mounted on the outer side wall of the housing. The telescopic shaft of the cylinder passes through the side wall of the housing and is fixedly connected to one side of the rack.

[0011] Preferably, a gear is rotatably mounted on the rear inner wall of the housing, and the gear meshes with a rack.

[0012] Preferably, a connecting rod is fixedly installed on the front side of the gear, the front end of the connecting rod passes through the mounting bracket and is fixedly connected to the rear side of the turntable.

[0013] The beneficial effects of this utility model are as follows: When using this device, the tip of the turbine blade is inserted between the bottom of the pressing plate and the inner wall of the bottom of the fixing frame. Then, the pressing bolt is rotated forward to drive the pressing plate to descend. The flexible pad between the bottom of the pressing plate and the inner wall of the bottom of the fixing frame presses and fixes the tip of the blade. At this time, the root of the blade is outside the fixing frame. Through these settings, the device can quickly press and fix the tip of the blade without obstructing the root of the blade. The starting cylinder drives the rack to slide linearly to the left on the rear inner wall of the housing. When the rack slides, it drives the gear meshing with it to rotate. When the gear rotates, it drives the connecting rod to rotate. The connecting rod drives the turntable to rotate on the front of the mounting frame, thereby flipping the fixed blade. Through these settings, the device can automatically flip the blade, allowing the root of the blade to be measured from all directions, increasing the measurement effect. Attached Figure Description

[0014] Figure 1 This is a front view of the overall structure of an embodiment of a turbine blade root measuring device according to the present invention;

[0015] Figure 2 This is a front sectional view of the overall structure of an embodiment of a turbine blade root measuring device according to the present invention;

[0016] Figure 3 This is a top sectional view of the overall structure of an embodiment of a turbine blade root measuring device according to the present invention.

[0017] Reference numerals: 1. Workbench; 2. Housing; 21. Door; 3. Fixing assembly; 31. Turntable; 32. Fixing frame; 33. Pressing plate; 34. Clamping bolt; 35. Flexible pad; 4. Tilting assembly; 41. Rack; 42. Gear; 43. Connecting rod; 44. Cylinder; 5. Mounting bracket; 6. Arc plate; 7. Measuring probe; 8. Data processing screen. Detailed Implementation

[0018] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not the entire structure.

[0019] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0020] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0021] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0022] Example 1

[0023] like Figure 1-3As shown, the present invention proposes a turbine blade root measuring device, comprising a workbench 1, a housing 2 fixedly mounted on the top of the workbench 1, a door 21 hinged to the front of the housing 2, a data processing screen 8 fixedly mounted on the front of the housing 2, an arc-shaped plate 6 fixedly mounted on the inner wall of the top of the housing 2, a plurality of measuring probes 7 evenly fixedly mounted on the bottom of the arc-shaped plate 6, and the measuring probes 7 being wiredly connected to the data processing screen 8, a mounting frame 5 fixedly mounted on the top of the workbench 1, and the mounting frame 5 being located inside the housing 2, a fixing component 3 being rotatably mounted on the front of the mounting frame 5, and a flipping component 4 for driving the fixing component 3 to flip on the rear side of the housing 2.

[0024] In this embodiment: the fixing component 3 includes a turntable 31 rotatably mounted on the front of the mounting frame 5, and a fixing frame 32 fixedly mounted on the front of the turntable 31. This arrangement allows the turntable 31 to rotate on the front of the mounting frame 5, and the rotation of the turntable 31 will cause the fixing frame 32 to rotate. A pressing plate 33 is slidably mounted inside the fixing frame 32, and a clamping bolt 34 is threaded onto the top wall of the fixing frame 32. The bottom end of the clamping bolt 34 is rotatably connected to the top of the pressing plate 33. This arrangement allows the pressing plate 33 to descend within the fixing frame 32 when rotated forward, and vice versa. Rotating the clamping bolt 34 can cause the pressing plate 33 to rise within the fixing frame 32, inserting the tip of the turbine blade between the bottom of the pressing plate 33 and the inner wall of the bottom of the fixing frame 32. Then, rotating the clamping bolt 34 in the forward direction causes the pressing plate 33 to descend, pressing and fixing the tip of the blade. Flexible pads 35 are fixedly installed on the bottom of the pressing plate 33 and the inner wall of the bottom of the fixing frame 32. With this setting, when pressing and fixing the tip of the blade, the two flexible pads 35 can increase the flexible contact between the fixing frame 32 and the pressing plate 33 and the tip of the blade, avoiding indentations on the blade surface.

[0025] Example 2

[0026] like Figure 1-3As shown, the turbine blade root measuring device proposed in this utility model, compared with Embodiment 1, further includes a flipping assembly 4 comprising a rack 41 slidably mounted on the rear inner wall of the housing 2, a cylinder 44 fixedly mounted on the outer wall of the housing 2, the telescopic shaft of the cylinder 44 penetrating through the side wall of the housing 2 and fixedly connected to one side of the rack 41. This arrangement allows the starting cylinder 44 to drive the rack 41 to slide back and forth linearly on the rear inner wall of the housing 2. A gear 42 is rotatably mounted on the rear inner wall of the housing 2, meshing with the rack 41. This arrangement allows the rack 41 to rotate when it slides. A connecting rod 43 is fixedly mounted on the front of the gear 42, the front end of the connecting rod 43 penetrating through the mounting frame 5 and fixedly connected to the rear side of the turntable 31. This arrangement allows the gear 42 to rotate when it rotates, causing the connecting rod 43 to rotate, which in turn causes the turntable 31 to rotate on the front of the mounting frame 5, thereby flipping the fixed blade.

[0027] Working principle: When using this device, the tip of the turbine blade is inserted between the bottom of the pressing plate 33 and the inner wall of the bottom of the fixing frame 32. Then, the pressing bolt 34 is rotated forward to drive the pressing plate 33 to descend. The flexible pad 35 between the bottom of the pressing plate 33 and the inner wall of the bottom of the fixing frame 32 presses and fixes the tip of the blade. At this time, the blade root is outside the fixing frame 32. Multiple measuring probes 7 scan and measure the blade root from multiple angles, and then transmit the data to the data processing screen 8 for display. The starting cylinder 44 drives the rack 41 to slide linearly to the left on the rear inner wall of the housing 2. When the rack 41 slides, it drives the gear 42 that meshes with it to rotate. When the gear 42 rotates, it drives the connecting rod 43 to rotate. The connecting rod 43 drives the turntable 31 to rotate on the front of the mounting frame 5, thereby flipping the fixed blade. Then, multiple measuring probes 7 scan and measure the other side of the blade root.

[0028] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A blade root measuring device for a turbine blade, comprising a work table (1), characterised in that: A housing (2) is fixedly installed on the top of the workbench (1). A door (21) is hinged to the front of the housing (2). A data processing screen (8) is fixedly installed on the front of the housing (2). An arc plate (6) is fixedly installed on the inner wall of the top of the housing (2). Multiple measuring probes (7) are evenly fixedly installed on the bottom of the arc plate (6). The measuring probes (7) are wired to the data processing screen (8). A mounting bracket (5) is fixedly installed on the top of the workbench (1). The mounting bracket (5) is located inside the housing (2). A fixing component (3) is rotatably installed on the front of the mounting bracket (5). A flipping component (4) is provided on the rear side of the housing (2) to drive the fixing component (3) to flip.

2. A blade root measuring device for a turbine blade as claimed in claim 1, characterised in that, The fixing component (3) includes a turntable (31) rotatably mounted on the front of the mounting bracket (5), and a fixing bracket (32) is fixedly mounted on the front of the turntable (31).

3. A blade root measuring device for a turbine blade as claimed in claim 2, wherein, The fixing frame (32) has a pressing plate (33) slidably installed inside, and a clamping bolt (34) is threaded on the top wall of the fixing frame (32), and the bottom end of the clamping bolt (34) is rotatably connected to the top of the pressing plate (33).

4. A blade root measuring device for a turbine blade as claimed in claim 3, wherein Flexible pads (35) are fixedly installed on the bottom of the pressing plate (33) and the inner wall of the bottom wall of the fixing frame (32).

5. A blade root measuring device for a turbine blade as claimed in claim 2, wherein, The flipping assembly (4) includes a rack (41) slidably mounted on the inner rear wall of the housing (2), and a cylinder (44) is fixedly mounted on the outer side wall of the housing (2). The telescopic shaft of the cylinder (44) passes through the side wall of the housing (2) and is fixedly connected to one side of the rack (41).

6. A turbine blade root measuring device according to claim 5, wherein, A gear (42) is rotatably mounted on the rear inner wall of the housing (2), and the gear (42) meshes with the rack (41).

7. A turbine blade root measuring device according to claim 6, wherein, A connecting rod (43) is fixedly installed on the front of the gear (42). The front end of the connecting rod (43) passes through the mounting bracket (5) and is fixedly connected to the rear side of the turntable (31).

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