A turbine blade testing fixture

Abstract

The utility model discloses a steam turbine blade test frock, including the pivot, drive subassembly is placed in the bottom of pivot, and with pivot transmission connection, one end equal angle fixed of pivot is provided with thread arc piece, be provided with limit component in thread arc piece, and this limit component includes: limiting piece, insert to the inside area department of multiple thread arc piece constitution, and the outside of limiting piece projects to the outside of thread arc piece, in this improved steam turbine blade test frock, add limit component, changed the cumbersome mode of traditional blade fixed, only need to tighten single bolt in the installation, and limit component can carry out positioning and fixed to blade, greatly simplified the operation process, reduced assembly and dismounting time, effectively avoided the wear and tear, silk and so on problem that produced because of many times dismounting bolt, significantly promoted the work efficiency of steam turbine blade test, provided powerful guarantee for large -scale, high -efficient blade test work.

Description

Technical Field

[0001] This utility model belongs to the field of testing tooling technology, specifically relating to a testing tooling for steam turbine blades. Background Technology

[0002] Steam turbine blade testing fixtures are key equipment devices specifically designed for testing the performance and quality of steam turbine blades. They accurately test critical parameters such as blade strength, vibration characteristics, and fatigue life. Using this fixture, potential defects in the design and manufacturing process of the blades can be identified in a timely manner, providing reliable data support for blade optimization and improvement. This ensures the safety and stability of steam turbine operation, improves its overall efficiency and service life. A steam turbine blade vibration frequency testing fixture disclosed in announcement number CN118067381B mainly uses a rotating shaft to drive the blade rotation, and works with corresponding testing equipment to detect the blade vibration.

[0003] Existing testing fixtures rely on multiple bolts for assembly and fixation of blades. This traditional method makes the entire assembly process extremely cumbersome, requiring operators to spend a significant amount of time and effort tightening each bolt individually to ensure blade stability. This excessive assembly time not only reduces testing efficiency but also increases labor costs.

[0004] Moreover, numerous problems arise during the subsequent disassembly process. Repeated loading and unloading can easily lead to bolt wear and stripping, making disassembly difficult and potentially damaging the blades or testing fixtures. This problem is particularly pronounced when measuring a large number of turbine blades. Frequent loading and unloading operations amplify these drawbacks, severely impacting the progress and quality of testing, and becoming a key factor restricting the improvement of turbine blade testing efficiency. Utility Model Content

[0005] The purpose of this utility model is to provide a turbine blade testing fixture to solve the problem of inconvenient operation in the disassembly and assembly of existing turbine blades mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a turbine blade testing fixture, comprising...

[0007] Shaft;

[0008] A drive assembly is located at the bottom of the rotating shaft and is connected to the rotating shaft in a transmission manner;

[0009] A threaded arc plate is fixed at one end of the rotating shaft at an equal angle; a limit component is provided inside the threaded arc plate, the limit component including:

[0010] A limiting member is inserted into the internal area formed by the plurality of threaded arc plates, and the outer part of the limiting member protrudes to the outside of the threaded arc plates, thereby limiting the periphery of the blade center through the protruding part;

[0011] A connector passes through the center of the limiting member and is screwed onto the end of the rotating shaft. The position of the limiting member is adjusted by the connector, thereby fitting the limiting member onto the blade and limiting the blade.

[0012] Preferably, the limiting member includes a middle plate, and an integral abutment plate is fixed around the middle plate. The abutment plate extends through the gap between every two adjacent threaded arc plates to the outside of the rotating shaft, and the middle plate is placed between multiple threaded arc plates.

[0013] Preferably, a through hole is provided at the center of the middle plate, and the connecting member is a clamping bolt that passes through the through hole; a screw hole for the clamping bolt to be screwed into is also provided on the end face of the rotating shaft. In use, the blade is first sleeved on the outside of the threaded arc plate and blocked by the limiting nut to prevent the blade from being directly sleeved on the area of ​​the rotating shaft. Then, the middle plate is placed inside the threaded arc plate, and then the clamping bolt passes through the through hole and is threadedly connected to the screw hole. Then, the clamping bolt is rotated, and the clamping bolt drives the middle plate to move towards the blade and clamps the blade.

[0014] Preferably, the clamping plate is further fixed with a post in the direction facing the blade. The post is configured to correspond to the screw hole on the blade. After the clamping plate clamps the blade, the post will also penetrate into the screw hole of the blade, thereby further enhancing the limiting and blocking effect on the blade.

[0015] Preferably, it also includes a support frame with two brackets, which are sleeved on the rotating shaft for supporting the rotating shaft.

[0016] Preferably, the drive assembly includes a servo motor disposed below the rotating shaft and a synchronous belt sleeved on the output end of the servo motor. A turntable is also fixed on the top of the rotating shaft. The synchronous belt is sleeved on the turntable. The rotation of the servo motor drives the synchronous belt to rotate, and the synchronous belt then drives the rotating shaft to rotate through the turntable, thereby achieving the purpose of testing the rotation of the blade.

[0017] Preferably, a limiting nut is also screwed onto the threaded arc blade. The limiting nut does not contact the end of the rotating shaft, and the installation position of the blade can be limited by the limiting nut.

[0018] Compared with the prior art, the beneficial effects of this utility model are:

[0019] The improved turbine blade testing fixture incorporates a limiting component, which changes the cumbersome traditional blade fixing method. During installation, only a single bolt needs to be tightened for the limiting component to position and fix the blade, greatly simplifying the operation process, reducing assembly and disassembly time, and effectively avoiding problems such as wear and stripping caused by repeated bolt loading and unloading. This significantly improves the efficiency of turbine blade testing and provides strong support for large-scale, high-efficiency blade testing. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the end of the present invention after the limiting component has been removed;

[0022] Figure 3 This is a schematic diagram of the limiting component of this utility model;

[0023] Figure 4 This is a schematic diagram of the structure of the limiting component of this utility model.

[0024] In the picture:

[0025] 100. Shaft; 101. Turntable; 102. Support frame; 103. Limit nut; 104. Threaded arc plate; 105. Threaded hole;

[0026] 200. Servo motor; 201. Synchronous belt;

[0027] 301. Tightening bolt; 302. Tightening plate; 303. Insert post; 304. Middle plate; 305. Through hole. Detailed Implementation

[0028] 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.

[0029] Please see Figures 1 to 4 This utility model provides a technical solution: a turbine blade testing fixture, comprising...

[0030] Shaft 100;

[0031] The drive assembly is located at the bottom of the rotating shaft 100 and is connected to the rotating shaft 100 in a transmission manner;

[0032] A threaded arc plate 104 is fixed at an equal angle at one end of the rotating shaft 100; a limit component is provided inside the threaded arc plate 104, the limit component including:

[0033] The limiting member is inserted into the internal area formed by multiple threaded arc plates 104, and the outer part of the limiting member protrudes to the outside of the threaded arc plates 104, thereby limiting the area around the center of the blade through the protruding part.

[0034] The connector passes through the center of the limiting member and is screwed onto the end of the rotating shaft 100. The position of the limiting member is adjusted by the connector, thereby fitting the limiting member onto the blade and achieving the limiting of the blade.

[0035] In this embodiment, preferably, the limiting member includes a middle plate 304, and an integral abutment plate 302 is fixed around the middle plate 304. The abutment plate 302 extends through the gap between every two adjacent threaded arc plates 104 to the outside of the rotating shaft 100, while the middle plate 304 is placed between multiple threaded arc plates 104.

[0036] In this embodiment, preferably, a through hole 305 is provided at the center of the middle plate 304, and the connecting component is a clamping bolt 301 that passes through the through hole 305; a screw hole 105 for the clamping bolt 301 to be screwed into is also provided on the end face of the rotating shaft 100. In use, the blade is first sleeved on the outside of the threaded arc plate 104, and blocked by the limiting nut 103 to prevent the blade from being directly sleeved in the area of ​​the rotating shaft 100. Then, the middle plate 304 is placed in the threaded arc plate 104, and then the clamping bolt 301 passes through the through hole 305 and is threadedly connected to the screw hole 105. Then, the clamping bolt 301 is rotated, and the clamping bolt 301 drives the middle plate 304 to move toward the blade and clamps the blade.

[0037] In this embodiment, preferably, the clamping plate 302 is also fixed with a post 303 in the direction facing the blade. The post 303 is correspondingly set with the screw hole on the blade. After the clamping plate 302 clamps the blade, the post 303 will also penetrate into the screw hole of the blade, thereby further enhancing the limiting and blocking effect on the blade.

[0038] In this embodiment, preferably, a support frame 102 is also included, on which two brackets are provided. The brackets are sleeved on the rotating shaft 100 and are used to support the rotating shaft 100.

[0039] In this embodiment, preferably, the driving component includes a servo motor 200 disposed below the rotating shaft 100 and a synchronous belt 201 sleeved on the output end of the servo motor 200. A turntable 101 is also fixed on the top of the rotating shaft 100. The synchronous belt 201 is sleeved on the turntable 101. The servo motor 200 rotates, driving the synchronous belt 201 to rotate. The synchronous belt 201 then drives the rotating shaft 100 to rotate through the turntable 101, thereby achieving the purpose of testing the blade rotation.

[0040] In this embodiment, preferably, a limiting nut 103 is also screwed onto the threaded arc plate 104. The limiting nut 103 does not contact the end of the rotating shaft 100. The limiting nut 103 can limit the installation position of the blade.

[0041] In actual testing, the vibration frequency of the impeller can be measured using a rotating mirror and a laser sensor positioned in front of the head end of the shaft. The rotating mirror refracts the laser light generated by the laser sensor at a certain angle onto the impeller, thereby detecting the vibration characteristics of the impeller during high-speed rotation. The vibration characteristics of the impeller at different rotational speeds are determined by changing the impeller's rotational speed; this testing method has already been disclosed in publication number CN118067381B, and therefore will not be elaborated further here.

[0042] Although embodiments of the present invention have been shown and described (see the detailed description above), it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A turbine blade testing fixture, comprising: Rotating shaft (100); A drive assembly is located at the bottom of the rotating shaft (100) and is connected to the rotating shaft (100) in a transmission manner; Its features are: A threaded arc plate (104) is fixed at one end of the rotating shaft (100) at an equal angle; a limit component is provided inside the threaded arc plate (104), the limit component including: The limiting member is inserted into the internal area formed by the plurality of threaded arc plates (104), and the outer part of the limiting member protrudes to the outside of the threaded arc plates (104); A connector passes through the center of the limiting member and is screwed onto the end of the rotating shaft (100).

2. The turbine blade testing fixture according to claim 1, characterized in that: The limiting component includes a middle plate (304), and an integral abutment plate (302) is fixed around the middle plate (304). The abutment plate (302) extends through the gap between every two adjacent threaded arc plates (104) to the outside of the rotating shaft (100), while the middle plate (304) is placed between multiple threaded arc plates (104).

3. The turbine blade testing fixture according to claim 2, characterized in that: The middle plate (304) has a through hole (305) at its center, and the connecting member is a clamping bolt (301) that passes through the through hole (305); a screw hole (105) for the clamping bolt (301) to be screwed into is also provided on the end face of the rotating shaft (100).

4. The turbine blade testing fixture according to claim 2, characterized in that: The clamping plate (302) is also fixed with a post (303) facing the blade, and the post (303) is set to correspond to the screw hole on the blade.

5. The turbine blade testing fixture according to claim 1, characterized in that: It also includes a support frame (102) on which two brackets are provided, which are sleeved on the rotating shaft (100).

6. The turbine blade testing fixture according to claim 5, characterized in that: The drive assembly includes a servo motor (200) disposed below the rotating shaft (100) and a synchronous belt (201) sleeved on the output end of the servo motor (200). A turntable (101) is also fixed on the top of the rotating shaft (100), and the synchronous belt (201) is sleeved on the turntable (101).

7. The turbine blade testing fixture according to claim 1, characterized in that: A limiting nut (103) is also screwed onto the threaded arc plate (104), and the limiting nut (103) does not contact the end of the rotating shaft (100).

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