A cross-section testing fixture for a steam turbine blade

Abstract

The utility model discloses a kind of section detection gauges of steam turbine blade, belong to detection tool field, comprising: pedestal, two support seats for supporting steam turbine blade end portion are equipped on the pedestal, one of the support seat is fixedly connected on pedestal, another support seat is slidably connected on pedestal, at least one saddle is slidably connected on the pedestal between two support seats, detachably mounted with clamping plate on the saddle, the clamping plate is equipped with the insertion port compatible with the section shape of steam turbine blade, the steam turbine blade is inserted in insertion port. The utility model has better flexibility and practicality, can make steam turbine blade maintain higher detection efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of testing tools, specifically relating to a cross-sectional testing fixture for steam turbine blades. Background Technology

[0002] A steam turbine, also known as a steam engine, is a rotary steam power unit. High-temperature, high-pressure steam passes through a fixed nozzle, becomes an accelerated airflow, and is then injected onto the blades, causing the rotor, which is equipped with rows of blades, to rotate and perform work. The directly welded rotor blades of a steam turbine are a key core component of large generator sets, and their manufacturing precision directly affects the overall operating efficiency and reliability of the unit; therefore, it is necessary to inspect the directly welded rotor blades of steam turbines.

[0003] Currently, the following problems typically exist in the inspection of directly welded blades:

[0004] 1. Overly specialized: Traditional inspection fixtures are mostly customized for a specific type of blade, and one set of fixtures can only inspect blades of one cross-section. When the product model changes, the original fixtures become obsolete and need to be redesigned and manufactured, which is costly and time-consuming.

[0005] 2. Poor flexibility: It cannot adapt to the cross-sectional inspection at different height positions of the blade. Multiple different inspection tools are required for different cross-sections of the same blade (such as the root, middle and tip of the blade), which is cumbersome and takes up a lot of space.

[0006] 3. Low efficiency: The entire fixture body needs to be frequently replaced and aligned during the inspection process, which increases auxiliary time and reduces inspection efficiency. Utility Model Content

[0007] The purpose of this invention is to provide a cross-sectional inspection tool for steam turbine blades, in order to solve the problems of existing molds being overly specialized, lacking flexibility, and inefficient.

[0008] To achieve the above objectives, the present invention adopts the following technical solution: a cross-sectional inspection fixture for steam turbine blades, comprising: a base, on which two support seats for supporting the ends of steam turbine blades are provided, one support seat being fixedly connected to the base and the other support seat being slidably connected to the base, and at least one saddle being slidably connected to the base between the two support seats, and a clamping plate being detachably installed on the saddle, the clamping plate being provided with a connector adapted to the cross-sectional shape of the steam turbine blade, and the steam turbine blade being inserted into the connector.

[0009] Preferably, a saddle is also deployed at the bottom of another support, and the other support is slidably mounted on the base via the saddle.

[0010] Preferably, each saddle includes a support plate and two sliders, the two sliders being mounted on the lower surface of the support plate, the base being provided with a pair of guide rails that form a sliding engagement with the sliders, the two sliders being slidably connected to the two guide rails respectively, and the clamping plate being mounted on the support plate.

[0011] Preferably, a plurality of pins are inserted into the support plate, and the plurality of pins enclose a clamping area, and the clamping plate is inserted into the clamping area.

[0012] Preferably, a plurality of positioning holes for fixing the support plate are provided on the base on the outer side of one of the guide rails. The plurality of positioning holes are distributed at equal intervals along the direction of the guide rail. A waist-shaped hole is provided on one end edge of the support plate. The waist-shaped hole is a countersunk hole. A bolt is inserted into the waist-shaped hole and the bolt is screwed into the positioning hole below the waist-shaped hole.

[0013] Preferably, a sleeve is provided between the support plate and the base, the sleeve is fixedly connected to the lower surface of the support plate, and the sleeve communicates with the waist-shaped hole.

[0014] Preferably, positioning blocks for positioning the spacing are provided between the sleeve and the support base near the support base, as well as between any two sleeves.

[0015] Preferably, both supports include multiple overlapping blocks, with the topmost block having a groove for placing the ends of the turbine blades.

[0016] The beneficial effects of this utility model are:

[0017] 1. This utility model can accommodate turbine blades of different lengths by adjusting the distance between the two support seats, thus adapting to the installation of turbine blades of different specifications and models, and has better flexibility and practicality.

[0018] 2. The clamping plate of this utility model is provided with an insertion port adapted to the cross-sectional shape of the turbine blade. The middle blade area of ​​the turbine blade can be inserted into the insertion port, and the clamping plate supports the middle position of the turbine blade. Since the clamping plate is installed on the saddle in a detachable manner, and the saddle can slide on the base, the support position of the clamping plate can be adjusted by the saddle when supporting different types of turbine blades. The clamping plate can also be replaced with a corresponding type, so that the insertion port of the clamping plate can be adapted to different types of turbine blades. Therefore, when inspecting different types of turbine blades, this invention only requires adjusting the position of the saddle and replacing the clamping plate, without replacing the entire inspection fixture, reducing the time spent on additional auxiliary operations and maintaining high inspection efficiency for turbine blades. Attached Figure Description

[0019] The accompanying drawings are provided to further illustrate the embodiments of the present invention and form part of the specification. They are used together with the following detailed description to explain the embodiments of the present invention, but do not constitute a limitation thereof. In the drawings:

[0020] Figure 1 This is a schematic diagram of the overall structure of a turbine blade cross-section inspection fixture provided in one embodiment of the present invention;

[0021] Figure 2 This is a schematic diagram of the overall structure of the clamping plate provided in one embodiment of the present invention;

[0022] Figure 3 This is a schematic diagram of the overall structure of the saddle provided in one embodiment of the present invention;

[0023] Figure 4 This is a schematic diagram of a deployment structure of the clamping area provided in one embodiment of the present invention;

[0024] Figure 5 This is a schematic diagram of another deployment structure of the clamping area provided in one embodiment of the present invention.

[0025] Explanation of reference numerals in the attached figures:

[0026] 1. Steam turbine blade; 2. Base; 3. Support base; 4. Clamping plate; 5. Connecting port; 6. Support plate; 7. Slider; 8. Guide rail; 9. Pin; 10. Clamping area; 11. Positioning hole; 12. Waist-shaped hole; 13. Sleeve; 14. Positioning block; 15. Groove; 16. Through groove. Detailed Implementation

[0027] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the present utility model will be briefly introduced below in conjunction with the accompanying drawings and descriptions of the embodiments or the prior art. Obviously, the following description of the structure of the accompanying drawings is only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. It should be noted that the description of these embodiments is used to help understand this utility model, but does not constitute a limitation on this utility model.

[0028] Example 1

[0029] Figure 1 This is a schematic diagram of the overall structure of a turbine blade cross-section inspection fixture provided in one embodiment of this utility model. Figure 1As shown, this embodiment provides a cross-sectional inspection fixture for a steam turbine blade. The fixture includes: a base 2, on which two support seats 3 for supporting the ends of the steam turbine blade 1 are provided. One support seat 3 is fixedly connected to the base 2, and the other support seat 3 is slidably connected to the base 2. At least one saddle is slidably connected to the base 2 between the two support seats 3. A clamping plate 4 is detachably installed on the saddle. The clamping plate 4 is provided with a connector 5 that is adapted to the cross-sectional shape of the steam turbine blade 1. The steam turbine blade 1 is inserted into the connector 5.

[0030] In this embodiment, two support seats 3 are used to support the ends of the turbine blades 1, and a clamping plate 4 disposed between the two support seats 3 is used to support the middle region of the turbine blades 1. When it is necessary to clamp different types of turbine blades 1, another support seat 3 can be slid to adjust the distance between the two support seats 3 to accommodate turbine blades 1 of different lengths. The fixture in this embodiment has good flexibility and practicality.

[0031] Because the clamping plate 4 is installed on the saddle using a detachable installation method, and the saddle can slide on the base 2, the support position of the clamping plate 4 can be adjusted by the saddle, and a corresponding model of clamping plate 4 can be replaced, so that the insertion interface of the clamping plate 4 can be adapted to different models of turbine blades 1, such as... Figure 2 As shown.

[0032] Therefore, when inspecting turbine blades 1 of different models, only the position of the saddle and the model of the clamping plate 4 need to be adjusted, without replacing the entire inspection fixture, reducing the time spent on additional auxiliary operations and maintaining high inspection efficiency for turbine blades 1.

[0033] Example 2

[0034] Based on Embodiment 1, in this embodiment, a saddle is also deployed at the bottom of another support 3, and the other support 3 is slidably mounted on the base 2 via the saddle.

[0035] like Figure 1 and Figure 3 As shown, each saddle includes a support plate 6 and two sliders 7. The two sliders 7 are respectively mounted on the lower surface of the support plate 6. The base 2 is provided with a pair of guide rails 8 that form a sliding fit with the sliders 7. The two sliders 7 are respectively slidably connected to the two guide rails 8. The clamping plate 4 is mounted on the support plate 6.

[0036] In this embodiment, the two guide rails 8 are directly fixed to the base 2 by bolts, and the slider 7 is mounted on the support plate 6 by bolts. In this embodiment, the guide rails 8 can adopt an I-shaped structure, and the structure of the slider 7 is adapted to the guide rails 8; alternatively, the guide rails 8 can also be a single directional rod, with the slider 7 having an inverted U-shaped structure and placed on the guide rails 8.

[0037] During the testing process, in order to prevent the saddle from sliding on the base 2, several positioning holes 11 for fixing the support plate 6 are provided on the base 2 outside one of the guide rails 8. The positioning holes 11 are evenly distributed along the direction of the guide rail 8. A waist-shaped hole 12 is provided on one edge of the support plate 6. The waist-shaped hole 12 is a countersunk hole. A bolt is inserted into the waist-shaped hole 12. The bolt is screwed into the positioning hole 11 below the waist-shaped hole 12.

[0038] In this embodiment, after adjusting the position of the saddle, the saddle is fixed with bolts, at which point the saddle cannot slide, thus improving the stability of the inspection operation.

[0039] In this embodiment, since the oblong hole 12 is deployed on one side of the support plate 6, when the guide rail 8 is a directional rod, tightening the bolts on one side of the support plate 6 will cause the other side of the support plate 6 to warp. To avoid this, a sleeve 13 is provided between the support plate 6 and the base 2. The sleeve 13 is fixedly connected to the lower surface of the support plate 6 and communicates with the oblong hole 12. The height of the sleeve 13 is adapted to the distance between the support plate 6 and the base 2. When the bolts are tightened, the other side of the support plate 6 will not warp. When the guide rail 8 is I-shaped, when one side of the support plate 6 is subjected to downward pressure, the support plate 6 will bend and deform. When the support plate 6 bends and deforms, the sliding resistance of the slider 7 on the guide rail 8 will increase, thus restricting the sliding of the slider 7. In this embodiment, by deploying the sleeve 13, one side of the support plate 6 will not be subjected to excessive downward pressure, thus avoiding bending and deformation of the support plate 6.

[0040] As a further optimization of this embodiment, positioning blocks 14 for positioning the distance are provided between the sleeve 13 near the support base 3 and the support base 3, as well as between any two sleeves 13. The length of each positioning block 14 in this embodiment is pre-calibrated, that is, each positioning block 14 is marked with its length; therefore, when adjusting the distance between the two saddles, it can be quickly adjusted by replacing positioning blocks 14 of different lengths or by combining multiple positioning blocks 14 to achieve the set distance.

[0041] Example 3

[0042] Based on Embodiment 2, a plurality of pins 9 are inserted into the support plate 6, and the plurality of pins 9 surround to form a clamping area 10, and the clamping plate 4 is inserted into the clamping area 10.

[0043] In this embodiment, as Figure 4 As shown, the support plate 6 has several blind holes, into which pins 9 can be inserted. Multiple pins 9 can form a region called the clamping area 10. The bottom of the clamping plate 4 can be directly inserted into the clamping area 10 to install the clamping plate 4. This installation structure has the advantage of being easy to install and remove.

[0044] In this embodiment, for the structure of the clamping area 10, another structure is also provided, such as... Figure 5 As shown, a through groove 16 is opened in the middle extension direction of the support plate 6, and multiple blind holes are deployed in the through groove 16. Pins 9 are also inserted into the blind holes. According to the length of the clamping plate 4, two blind holes are selected and pins 9 are inserted into them respectively. At this time, the through groove 16 and the two pins 9 constitute the clamping area 10.

[0045] Example 4

[0046] Based on Embodiment 1, both support bases 3 include multiple overlapping blocks, and the topmost block is provided with a groove 15 for placing the end of the turbine blade 1.

[0047] In this embodiment, the height of the entire support 3 can be adjusted by changing the number of blocks to accommodate the height requirements of different turbine blades 1.

[0048] The above are merely embodiments of this application and are not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A cross-sectional inspection fixture for steam turbine blades, characterized in that, include: The base (2) is provided with two support seats (3) for supporting the ends of the turbine blades (1). One support seat (3) is fixedly connected to the base (2), and the other support seat (3) is slidably connected to the base (2). At least one saddle is slidably connected to the base (2) between the two support seats (3). A clamping plate (4) is detachably installed on the saddle. The clamping plate (4) is provided with a connector (5) that matches the cross-sectional shape of the turbine blades (1). The turbine blades (1) are inserted into the connector (5).

2. The turbine blade cross-section inspection fixture according to claim 1, characterized in that, Another support (3) also has a saddle at its bottom, and the other support (3) is slidably mounted on the base (2) via the saddle.

3. The turbine blade cross-section inspection fixture according to claim 1 or 2, characterized in that, Each saddle includes a support plate (6) and two sliders (7). The two sliders (7) are respectively mounted on the lower surface of the support plate (6). The base (2) is provided with a pair of guide rails (8) that form a sliding fit with the sliders (7). The two sliders (7) are respectively slidably connected to the two guide rails (8). The clamping plate (4) is mounted on the support plate (6).

4. The turbine blade cross-section inspection fixture according to claim 3, characterized in that, The support plate (6) is provided with a number of pins (9), and the pins (9) enclose a clamping area (10). The clamping plate (4) is inserted in the clamping area (10).

5. The turbine blade cross-section inspection fixture according to claim 3, characterized in that, On the base (2) on the outer side of one of the guide rails (8), there are several positioning holes (11) for fixing the support plate (6). The positioning holes (11) are evenly distributed along the direction of the guide rail (8). A waist-shaped hole (12) is provided on one end edge of the support plate (6). The waist-shaped hole (12) is a countersunk hole. A bolt is inserted into the waist-shaped hole (12). The bolt is screwed into the positioning hole (11) below the waist-shaped hole (12).

6. The turbine blade cross-section inspection fixture according to claim 5, characterized in that, A sleeve (13) is provided between the support plate (6) and the base (2). The sleeve (13) is fixedly connected to the lower surface of the support plate (6) and communicates with the waist-shaped hole (12).

7. The turbine blade cross-section inspection fixture according to claim 1, characterized in that, Positioning blocks (14) for positioning the spacing are provided between the sleeve (13) near the support base (3) and the support base (3) and between any two sleeves (13).

8. The turbine blade cross-section inspection fixture according to claim 1, characterized in that, Both support bases (3) include multiple overlapping blocks, with the topmost block having a groove (15) for placing the end of the turbine blade (1).

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