A compressor stator blade casing assembly structure and method thereof

Abstract

A compressor stator blade casing assembly structure includes: a stator casing, the inner wall of which has an annular groove; a plurality of stator blades, which are arranged circumferentially in the stator casing; the upper edge plate of each stator blade is inserted into the annular groove, wherein an assembly adjustment groove is processed between the upper edge plates of two adjacent stator blades; an assembly adjustment sheet is inserted into the annular groove and located in the assembly adjustment groove, so that the upper edge plates of each stator blade are squeezed together in the annular groove. And, a compressor stator blade casing assembly method includes: according to the deviation between the sum of the sizes of the upper edge plates of each stator blade and the design value, the assembly adjustment groove is processed between the upper edge plates of two adjacent stator blades, and the corresponding assembly adjustment sheet is processed; the upper edge plates and assembly adjustment sheets of each stator blade are inserted into the annular groove of the inner wall of the stator casing, and the assembly adjustment sheet is located in the assembly adjustment groove, and the sum of the effective sizes of the upper edge plates of each stator blade is consistent with the design value.

Description

Technical Field

[0001] The present application belongs to the technical field of compressor stator blade casing assembly design, and specifically relates to a compressor stator blade casing assembly structure and method. Background Art

[0002] In the engine, the compressor stator blades are arranged circumferentially in the stator casing, and the upper edge plates at the blade tips are clamped in the annular grooves on the inner wall of the stator casing. The upper edge plates clamped in the annular grooves on the inner wall of the stator casing are pressed against each other to form a stable structure.

[0003] Each stator blade in the compressor is processed separately, and dimensional errors are inevitably introduced. When the number of stator blades is large, when the upper edge plates of each stator blade are inserted into the annular grooves on the inner wall of the stator casing, the dimensional errors of the upper edge plates of each stator blade accumulate, and there is a situation where the deviation from the design value is large. If the cumulative dimensions of the upper edge plates of each stator blade are greater than the design value and exceed the allowable range, it will be impossible to insert the upper edge plates of each stator blade into the annular grooves on the inner wall of the stator casing; if the cumulative dimensions of the upper edge plates of each stator blade are less than the design value, the design value will be exceeded. If the measured value exceeds the allowable range, there will be a large gap between the upper edge plates of each stator blade inserted into the annular groove on the inner wall of the stator casing, which makes it easy for the upper edge plates of each stator blade to rotate circumferentially in the annular groove on the inner wall of the stator casing. On the one hand, the upper edge plates of each stator blade will suffer severe impact damage when the compressor is working. On the other hand, each stator blade will rotate back and forth in a large range when the compressor is working, making it difficult to ensure the stability of the airflow in the compressor flow channel, affecting the performance of the engine and limiting the improvement of the overall performance of the engine.

[0004] For the above problems, the current practice is to reprocess and replace one or more stator blades so that the cumulative size of the upper edge plates of each stator blade is within the range allowed by the design value. This practice has the following defects:

[0005] 1) The stator blades have a high cost. Reprocessing and replacing one or more stator blades is costly and uneconomical.

[0006] 2) The structure of the stator blades is complex and the processing precision is high. Specialized personnel and equipment are needed for processing. The reprocessing and replacement of one or more stator blades takes a long time.

[0007] This application is proposed in view of the above-mentioned technical defects.

[0008] It should be noted that the disclosure of the above background technology content is only used to assist in understanding the inventive concept and technical solution of the present invention, and it does not necessarily belong to the prior art of this patent application. In the absence of clear evidence that the above content has been disclosed on the filing date of this application, the above background technology should not be used to evaluate the novelty and creativity of the present application. Summary of the invention

[0009] The purpose of the present application is to provide a compressor stator blade casing assembly structure and method thereof, so as to overcome or alleviate at least one aspect of the known technical defects.

[0010] The technical solution of this application is:

[0011] On the one hand, a compressor stator blade casing assembly structure is provided, comprising:

[0012] The stator casing has an annular groove on its inner wall;

[0013] A plurality of stator blades are arranged circumferentially in the stator casing; the upper edge plate of each stator blade is inserted into the annular groove, wherein an assembly adjustment groove is processed between the upper edge plates of two adjacent stator blades;

[0014] The assembly adjustment sheet is clamped in the annular clamping groove and is located in the assembly adjustment groove, so that the upper edge plates of each stator blade are squeezed together in the annular clamping groove.

[0015] According to at least one embodiment of the present application, in the above-mentioned compressor stator blade casing assembly structure, the assembly adjustment groove is divided into two halves on the upper edge plates of the two stator blades between which the assembly adjustment groove is processed.

[0016] According to at least one embodiment of the present application, in the above-mentioned compressor stator blade-casing assembly structure, the assembly adjustment groove opens toward the stator casing.

[0017] According to at least one embodiment of the present application, in the above-mentioned compressor stator blade casing assembly structure, the corner portions of the assembly adjustment sheet and the assembly adjustment groove are in rounded contact with each other.

[0018] According to at least one embodiment of the present application, in the above-mentioned compressor stator blade casing assembly structure, the stator casing is composed of two parts that are butt-jointed along the radial direction;

[0019] A stop notch is formed at the butt joint of the two stator casings and on the upper edge plate of the stator blades there;

[0020] The compressor stator blade casing assembly structure also includes:

[0021] Two stop blocks, each stop block is correspondingly stuck in a stop notch.

[0022] On the other hand, a compressor stator blade casing assembly method is provided, comprising:

[0023] According to the deviation between the sum of the dimensions of the upper edge plates of each stator blade and the design value, an assembly adjustment groove is processed between the upper edge plates of two adjacent stator blades, and a corresponding assembly adjustment piece is processed;

[0024] Insert the upper edge plate and assembly adjustment piece of each stator blade into the annular groove on the inner wall of the stator casing. The assembly adjustment piece is located in the assembly adjustment groove, and the sum of the effective dimensions of the upper edge plates of each stator blade is consistent with the design value, so that the upper edge plates of each stator blade are squeezed together in the annular groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic diagram of the compressor stator blade casing assembly structure provided in an embodiment of the present application;

[0026] Figure 2 It is a schematic diagram of machining and assembling an adjustment groove between upper edge plates of two adjacent stator blades provided in an embodiment of the present application;

[0027] Figure 3 is a schematic diagram of an assembly adjustment sheet provided in an embodiment of the present application;

[0028] Figure 4 It is a schematic diagram of clamping the assembly adjustment sheet in the annular clamping groove between the upper edge plates of two adjacent stator blades provided by an embodiment of the present application;

[0029] in:

[0030] 1- stator casing; 2- stator blades; 3- assembly and adjustment blades.

[0031] In order to better illustrate this embodiment, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product; in addition, the drawings are used for illustrative purposes, and the terms describing the positional relationship are limited to illustrative purposes and cannot be understood as limitations on this patent. DETAILED DESCRIPTION

[0032] In order to make the technical solution and advantages of the present application clearer, the technical solution of the present application will be further described in detail in detail and in detail in conjunction with the accompanying drawings. It can be understood that the specific embodiments described here are only partial embodiments of the present application, which are only used to explain the present application, not to limit the present application. It should be noted that, for the convenience of description, only the parts related to the present application are shown in the accompanying drawings, and other related parts can refer to the general design. In the absence of conflict, the embodiments in the present application and the technical features in the embodiments can be combined with each other to obtain new embodiments.

[0033] In addition, unless otherwise defined, the technical terms or scientific terms used in the description of this application shall be the common meanings understood by the general technicians in the field to which this application belongs. The words "upper", "lower", "left", "right", "center", "vertical", "horizontal", "inside", "outside" and other words indicating orientation used in the description of this application are only used to indicate the relative direction or positional relationship, and do not imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. When the absolute position of the described object changes, its relative positional relationship may also change accordingly, so it cannot be understood as a limitation on this application. The "first", "second", "third" and similar terms used in the description of this application are only used for descriptive purposes to distinguish different components, and cannot be understood as indicating or implying relative importance. The similar words "one", "one" or "the" used in the description of this application should not be understood as an absolute limitation on quantity, but should be understood as the existence of at least one. The similar words "including" or "comprising" used in the description of this application mean that the elements or objects appearing in front of the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects.

[0034] In addition, it should be noted that, unless otherwise clearly specified and limited, the words "installed", "connected", "connected" and similar terms used in the description of this application should be understood in a broad sense. For example, the connection can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, an indirect connection through an intermediate medium, or the internal connection of two components. Technical personnel in the field can understand their specific meanings in this application according to the specific circumstances.

[0035] The following is combined with Figures 1 to 4 This application is described in further detail.

[0036] On the one hand, a compressor stator blade casing assembly structure is provided, comprising:

[0037] The stator casing 1 has an annular groove on its inner wall;

[0038] A plurality of stator blades 2 are arranged circumferentially in the stator casing 1; the upper edge plate of each stator blade 2 is inserted into the annular groove, wherein an assembly adjustment groove is processed between the upper edge plates of two adjacent stator blades 2;

[0039] The assembly adjustment sheet 3 is clamped in the annular clamping groove and located in the assembly adjustment groove, so that the upper edge plates of each stator blade 2 are pressed together in the annular clamping groove.

[0040] For the compressor stator blade casing assembly structure disclosed in the above embodiment, it can be understood by those skilled in the art that it can be assembled according to the following steps:

[0041] According to the deviation between the sum of the sizes of the upper edge plates of each stator blade 2 and the design value, an assembly adjustment groove is processed between the upper edge plates of two adjacent stator blades 2, and a corresponding assembly adjustment piece 3 is processed;

[0042] The upper edge plates and assembly adjustment pieces 3 of each stator blade 2 are inserted into the annular grooves on the inner wall of the stator casing. The assembly adjustment pieces 3 are located in the assembly adjustment grooves, and the sum of the effective dimensions of the upper edge plates of each stator blade 2 is consistent with the design value, that is, it is within the allowable range of the design value, so that the upper edge plates of each stator blade 2 are squeezed together in the annular grooves to form a stable structure.

[0043] For the assembly structure between the compressor stator blade casings disclosed in the above-mentioned embodiment, technicians in the field can also understand that when the cumulative deviation of the size of the upper edge plate of each stator blade inserted into the annular groove on the inner wall of the stator casing from the design value is large, there is no need to reprocess or replace one or more stator blades. It is only necessary to process the assembly adjustment groove between the upper edge plates of two adjacent stator blades 2 and the corresponding assembly adjustment piece 3 according to the deviation between the sum of the sizes of the upper edge plates of each stator blade 2 and the design value, and insert the upper edge plate and assembly adjustment piece 3 of each stator blade 2 into the annular groove on the inner wall of the stator casing so that the assembly adjustment piece 3 is located in the assembly adjustment groove, and the sum of the effective sizes of the upper edge plates of each stator blade 2 is consistent with the design value. It is only designed to partially modify the upper edge plates of two adjacent stator blades 2, and retain the original main structure of the stator blade 2. The cost required is low, and the processing is simple. No special personnel and equipment are required, and the time required is short.

[0044] In some optional embodiments, in the above-mentioned compressor stator blade casing assembly structure, the assembly adjustment groove is divided into two parts, and the upper edge plates of the two stator blades 2 with the assembly adjustment groove processed therebetween, that is, the upper edge plates of the two stator blades 2 each have half of the assembly adjustment groove, so as to avoid the situation where one stator blade 2 seriously deviates from the design position after the assembly is completed.

[0045] In some optional embodiments, in the above-mentioned compressor stator blade casing assembly structure, the assembly adjustment groove opens toward the stator casing 1. When assembling the structure, the assembly adjustment piece 3 can be first clamped into the assembly adjustment groove so that the assembly adjustment piece 3 is reliably clamped between two adjacent stator blades 2, and then clamped into the annular clamping groove, which can ensure that the assembly adjustment piece 3 is accurately positioned during the assembly process to avoid jamming and falling off.

[0046] In some optional embodiments, in the above-mentioned compressor stator blade casing assembly structure, the assembly adjustment piece 3 and the assembly adjustment groove have a rounded corner contact to avoid generating large local stress and causing structural damage.

[0047] In some optional embodiments, in the above-mentioned compressor stator blade casing assembly structure, the stator casing 1 is composed of two parts connected radially to facilitate the assembly of the structure, and an assembly adjustment groove can be processed between the upper edge plates of two adjacent stator blades 3 in the corresponding stator blade 2 in each part of the stator casing 1 for installing the assembly adjustment piece 3;

[0048] A stop notch is formed at the butt joint of the two stator casings 1 and on the upper edge plate of the stator blades 2 there.

[0049] The compressor stator blade casing assembly structure also includes:

[0050] There are two stop blocks, each of which is correspondingly clamped in a stop notch to reliably limit the rotation of the upper edge plate of each stator blade 3 clamped in the annular clamping groove.

[0051] On the other hand, a compressor stator blade casing assembly method is provided, comprising:

[0052] According to the deviation between the sum of the sizes of the upper edge plates of each stator blade 2 and the design value, an assembly adjustment groove is processed between the upper edge plates of two adjacent stator blades 2, and a corresponding assembly adjustment piece 3 is processed;

[0053] The upper edge plate and assembly adjustment piece 3 of each stator blade 2 are inserted into the annular groove on the inner wall of the stator casing. The assembly adjustment piece 3 is located in the assembly adjustment groove, and the sum of the effective dimensions of the upper edge plates of each stator blade 2 is consistent with the design value, so that the upper edge plates of each stator blade 2 are squeezed together in the annular groove.

[0054] The compressor stator blade casing assembly method disclosed in the above embodiment is used to realize the assembly of the compressor stator blade casing assembly structure disclosed in the above embodiment. The description is relatively simple. For specific related matters, please refer to the description of the relevant part of the compressor stator blade casing assembly structure. Its technical effect can also refer to the technical effect of the relevant part of the compressor stator blade casing assembly structure, which will not be repeated here.

[0055] The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0056] So far, the technical solution of the present application has been described in conjunction with the preferred embodiments shown in the accompanying drawings. Those skilled in the art should understand that the scope of protection of the present application is obviously not limited to these specific embodiments. Without departing from the principles of the present application, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the scope of protection of the present application.

Claims

1. A compressor stator blade casing assembly structure, characterized in that: include: A stator casing (1), the inner wall of which has an annular groove; A plurality of stator blades (2) are arranged in the stator casing (1) along a circumferential direction; the upper edge plate of each stator blade (2) is inserted into the annular groove, wherein an assembly adjustment groove is processed between the upper edge plates of two adjacent stator blades (2); An assembly adjustment sheet (3) is clamped in the annular clamping groove and is located in the assembly adjustment groove, so that the upper edge plates of each stator blade (2) are pressed together in the annular clamping groove; The assembly adjustment groove is divided into two parts, and the upper edge plates of the two stator blades (2) are processed with the assembly adjustment groove between them; The assembly adjustment groove opens toward the stator casing (1).

2. The compressor stator blade casing assembly structure according to claim 1, characterized in that: The assembly adjustment piece (3) is in rounded contact with the corner portion of the assembly adjustment groove.

3. The compressor stator blade casing assembly structure according to claim 1, characterized in that: The stator casing (1) is composed of two parts connected radially; A stop notch is formed at the butt joint of the two parts of the stator casing (1) and on the upper edge plate of the stator blade (2) at that location; The compressor stator blade casing assembly structure further includes: Two stop blocks, each of which is correspondingly clamped in one of the stop notches.

4. A compressor stator blade casing assembly method, characterized in that: include: According to the deviation between the sum of the dimensions of the upper edge plates of each stator blade (2) and the design value, an assembly adjustment groove is machined between the upper edge plates of two adjacent stator blades (2), and a corresponding assembly adjustment piece (3) is machined; The upper edge plates of each stator blade (2) and the assembly adjustment plate (3) are inserted into the annular groove on the inner wall of the stator casing. The assembly adjustment plate (3) is located in the assembly adjustment groove, and the sum of the effective dimensions of the upper edge plates of each stator blade (2) is consistent with the design value, so that the upper edge plates of each stator blade (2) are pressed together in the annular groove.

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