Inner cavity detection device for stationary blade of gas turbine

Abstract

The utility model discloses an inner cavity detection device of a gas turbine stationary blade, which comprises two detection rods, namely a through rod and a stop rod, the outer contour size of the through rod is smaller than the theoretical size of the inner contour of a flow guide cavity, and the outer contour size of the stop rod is larger than the theoretical size of the inner contour of the flow guide cavity; according to the utility model, the overall dimension of the flow guide cavity in the gas turbine stationary blade can be rapidly, accurately and effectively measured and controlled by adopting the through rod and the stop rod, the use is convenient, the device is suitable for batch detection, and the consistency, the stability and the credibility of data can be ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of precision casting, in particular to an inner cavity detection device for a stationary blade of a combustion engine. Background Art

[0002] The function of the gas turbine stationary blade is to convert the kinetic energy of the airflow in the moving blade into pressure energy, guide the airflow, and adjust the direction of the airflow. The gas turbine stationary blade has a guide cavity structure (such as Figure 2 , 3 ), the shape of this structure is controlled by the spoiler ridges of the blade inner cavity. When the stationary blades are assembled, a guide tube is installed here to achieve airflow guidance. During the blade processing process, strict requirements are placed on the contour dimensions of the cavity here, and the dimensional tolerance is ±0.2. The existing method for controlling the contour dimensions of the guide cavity of the gas turbine stationary blade is mainly to determine the shape of the cavity by using a ceramic core during the casting process, and then measure the shape to ensure that the contour of the cavity meets the standard. Since the cavity here is a special-shaped cavity and the contour is inside the blade shape, high dimensional accuracy is required, and conventional measurement methods cannot be used for measurement. To this end, the present application proposes an inner cavity detection device for a gas turbine stationary blade to solve the problem of measuring the contour dimensions of the guide cavity of a gas turbine stationary blade. Utility Model Content

[0003] The main purpose of the utility model is to provide an inner cavity detection device for a gas turbine stator blade, which can effectively solve the problems in the background technology.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: an inner cavity detection device for a gas turbine stator blade, which includes two detection rods, namely a through rod and a stop rod. The outer contour size of the through rod is smaller than the theoretical inner contour size of the guide cavity, and the outer contour size of the stop rod is larger than the theoretical inner contour size of the guide cavity.

[0005] Preferably, the deviation between the outer contour dimensions of the through rod and the stop rod and the inner contour dimensions of the guide cavity is 0.1-0.2 mm.

[0006] Preferably, the deviation between the outer contour dimensions of the through rod and the stop rod and the inner contour dimensions of the guide cavity is 0.15 mm.

[0007] Preferably, a handle is provided at one end of the detection rod.

[0008] Preferably, the detection rod is provided with scales along the length direction.

[0009] Preferably, the "0" of the scale is located at the end of the detection rod away from the handle.

[0010] Compared with traditional technologies, the beneficial effects produced by the utility model are: the utility model adopts a pass rod and a stop rod to quickly and accurately effectively measure and control the contour size of the guide cavity inside the stator blade of the gas turbine, is easy to use, suitable for batch testing, and can ensure the consistency, stability and credibility of the data. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the scheme in the utility model, a brief introduction is given below to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0012] Figure 1 It is a three-dimensional schematic diagram of the overall structure of the utility model;

[0013] Figure 2 This is a schematic diagram of the structure of the existing gas turbine stator blades;

[0014] Figure 3 for Figure 2 Schematic cross-sectional view of ;

[0015] Figure 4 This is a schematic diagram of the guide cavity detection of the gas turbine stator blade.

[0016] The markings in the figure are as follows:

[0017] 1. Test rod; 2. Handle; 3. Scale; 4. Gas turbine stator; 5. Guide cavity; 6. Spoiler ridge. DETAILED DESCRIPTION

[0018] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0019] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiments of the utility model will be clearly and completely described below in conjunction with the accompanying drawings.

[0020] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features and technical solutions in the embodiments may be combined with each other.

[0021] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0022] Please refer to Figure 1 , provides an inner cavity detection device for a gas turbine stator blade, which includes a detection rod 1. The detection rod 1 is made of stainless steel and is replicated according to the inner cavity of a drawing model. There are two detection rods 1, namely a through rod and a stop rod. The outer contour size of the through rod is smaller than the theoretical inner contour size of the guide cavity 5, and the outer contour size of the stop rod is larger than the theoretical inner contour size of the guide cavity 5.

[0023] Furthermore, the outer contour dimensions of the through rod and the stop rod deviate from the inner contour dimensions of the guide cavity 5 by 0.1-0.2 mm. In the present embodiment, the outer contour dimensions of the through rod and the stop rod deviate from the inner contour dimensions of the guide cavity 5 by 0.15 mm, that is, the outer contour dimension of the through rod is 0.15 mm smaller than the theoretical inner contour dimension of the guide cavity 5, and the outer contour dimension of the stop rod is 0.15 mm larger than the theoretical inner contour dimension of the guide cavity 5.

[0024] A handle 2 is provided at one end of the detection rod 1 for easy use. A scale 3 is provided along the length direction of the detection rod 1, and the "0" of the scale 3 is provided at the end of the detection rod 1 away from the handle 2. During the detection, the penetration depth can be obtained according to the reading on the scale 3, so as to identify which spoiler ridge 6 has a size deviation.

[0025] like Figure 2-3 As shown, the detection method is: when detecting the inner cavity size of the guide cavity 5 of the gas turbine stator blade 4, the through rod and the stop rod are respectively inserted into the entrance position of the guide cavity 5 on the blade large edge plate. If the through rod can be completely inserted but the stop rod cannot be inserted, the contour size of the blade guide cavity 5 is qualified; if both the through rod and the stop rod can be inserted, it means that the size of the guide cavity 5 is too large, and it is necessary to analyze the spoiler ridge 6 with a specific size deviation according to the scale 3 of the stop rod insertion depth, and adjust the ceramic core structure size; if both the through rod and the stop rod cannot be inserted, it means that the size of the guide cavity 5 is too small, and it is necessary to analyze the spoiler ridge 6 with a specific size deviation according to the scale 3 of the through rod insertion depth, and check the size deviation, and micro-process the spoiler ridge 6 for the contour control of the guide cavity 5 according to the deviation amount, until the guide cavity 5 gas turbine stator blade 4 within the size tolerance range is obtained.

[0026] The detection rod 1 of the guide cavity 5 adopts the through-stop detection method, which can realize targeted and precise control of the contour size of the guide cavity 5; the scales 3 on the rod body of the through rod and the stop rod can accurately determine the spoiler edge 6 where the specific size deviation occurs, which is convenient for the mold repair or processing of the ceramic core; the addition of the handle 2 is more conducive to the use of the detection rod 1.

[0027] The shape of the guide cavity 5 detection rod 1 is replicated according to the upper and lower tolerances of the guide cavity 5 contour, and combined with the scales 3 of the pass and stop rods, precise control of the contour size of the guide cavity 5 inside the turbine stator 4 is achieved.

[0028] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] Obviously, the embodiments described above are only some embodiments of the utility model, rather than all embodiments. The preferred embodiments of the utility model are given in the accompanying drawings, but they do not limit the patent scope of the utility model. The utility model can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the utility model more thorough and comprehensive. Although the utility model is described in detail with reference to the aforementioned embodiments, for those skilled in the art, it is still possible to modify the technical solutions recorded in the aforementioned specific implementation methods, or to replace some of the technical features therein with equivalents. Any equivalent structure made using the contents of the utility model specification and the accompanying drawings, directly or indirectly used in other related technical fields, is also within the scope of patent protection of the utility model.

Claims

1. An inner cavity detection device for a gas turbine stator blade, characterized in that: It comprises detection rods, which are two detection rods, namely a through rod and a stop rod. The outer contour size of the through rod is smaller than the theoretical inner contour size of the guide cavity, and the outer contour size of the stop rod is larger than the theoretical inner contour size of the guide cavity.

2. The inner cavity detection device of a gas turbine stator blade according to claim 1 is characterized in that: The deviation between the outer contour dimensions of the through rod and the stop rod and the inner contour dimensions of the guide cavity is 0.1-0.2 mm.

3. The inner cavity detection device of a gas turbine stator blade according to claim 2 is characterized in that: The deviation between the outer contour dimensions of the through rod and the stop rod and the inner contour dimensions of the guide cavity is 0.15 mm.

4. The inner cavity detection device of a gas turbine stator blade according to claim 1 is characterized in that: A handle is provided at one end of the detection rod.

5. The inner cavity detection device of a gas turbine stator blade according to claim 1, characterized in that: The detection rod is provided with scales along the length direction.

6. The inner cavity detection device of a gas turbine stator blade according to claim 5, characterized in that: The "0" of the scale is set at the end of the detection rod away from the handle.

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