Clamp structure of equivalent blade centrifugal load

Abstract

The invention discloses an equivalent blade centrifugal load clamp structure, and relates to the technical field of aero-engine and gas turbine rotor supporting, the equivalent blade centrifugal load clamp structure comprises a lower base, a fixed block, a wedge block, an upper adapter and an upper base which are sequentially arranged from bottom to top; a tenon groove is formed in the fixing block, the tenon groove is matched with a tenon of a blade, the number of the wedge-shaped blocks is two, the end faces, close to each other, of the two wedge-shaped blocks form a clamping space, and the clamping space is matched with a blade body; and the wedge-shaped block is connected with the upper adapter through the side plate. The device is convenient to process, the rigidity is convenient to adjust, the influence of disassembly and assembly is overcome fundamentally, and the device has high engineering application value. The method can be compatible with other load detection methods, the physical significance is clear, the structure is simple and clear, the optimization result obtained on the basis of the structure is more effective subsequently, and a foundation is laid for the design of a supporting structure.

Description

Technical Field

[0001] The invention relates to the technical field of aero-engine and gas turbine rotor support, and in particular to a fixture structure for equivalent blade centrifugal load. Background Art

[0002] The blade is the core structure of the aircraft engine. Its structure and strength characteristics directly affect the dynamic characteristics of the rotor shaft system. Before the formal test, the blade strength is usually checked through a tensile test. Usually, the blade tensile test only fixes the base, but this structure has obvious disadvantages: the centrifugal load of the blade will not only generate centrifugal tensile stress, but also centrifugal bending stress.

[0003] In view of the gaps in current engineering practice, this application proposes a fixture structure for equivalent blade centrifugal load, which better solves the above-mentioned technical drawbacks and has high engineering value. Summary of the invention

[0004] The purpose of the present invention is to solve the defects in the prior art and to propose a fixture structure for equivalent blade centrifugal load.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A fixture structure for equivalent blade centrifugal load, comprising a lower base, a fixing block, a wedge block, an upper adapter and an upper base arranged in sequence from bottom to top;

[0007] The fixing block is provided with a mortise and tenon which matches with the tenon of the blade. The wedge blocks are divided into two groups, and the adjacent end faces of the two groups of wedge blocks form a clamping space which matches with the blade body. The wedge blocks are connected with the upper adapter through the side plates.

[0008] Furthermore, the upper base includes an upper fixing plate and an upper clamping plate, the upper clamping plate is fixedly connected to the upper fixing plate, a mounting groove is provided at the bottom of the upper clamping plate, and the upper adapter is connected to the upper clamping plate through the mounting groove; mounting holes are provided on the side walls of the mounting groove and the upper adapter.

[0009] Furthermore, the upper adapter includes an upper vertical plate, a horizontal plate and a lower vertical plate arranged from top to bottom, the plane where the upper vertical plate is located is perpendicular to the plane where the lower vertical plate is located, the upper vertical plate is adapted to the installation groove, and the lower vertical plate is connected to the two side plates.

[0010] Furthermore, an arc groove is provided on the working surface of the wedge-shaped block, and the arc grooves of the two wedge-shaped blocks are respectively matched with the two end surfaces of the blade body.

[0011] Furthermore, the lower base includes a lower fixed plate and a lower clamping plate, the lower clamping plate is fixedly connected to the lower fixed plate, a mounting groove is provided at the bottom of the lower clamping plate, and the fixing block is connected to the lower clamping plate through the mounting groove; the side wall of the mounting groove and the fixing block are provided with mounting holes.

[0012] Beneficial Effects

[0013] Compared with the prior art, the beneficial effect of the present invention is that by setting a wedge block, the angle between the blade axis and the geometric profile can be adjusted, which is mainly used to simulate the bending stress caused by centrifugal force. The present invention is easy to process and easy to adjust the stiffness, fundamentally overcomes the influence of disassembly and assembly, and has a high engineering application value. It is compatible with other load detection methods, has clear physical meaning, and a simple and clear structure. The subsequent optimization results obtained based on the proposed structure are more effective, which lays a foundation for the design of the support structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0015] Figure 1 The figure is a schematic diagram of the overall structure of the fixture.

[0016] Figure 2 Schematic diagram of the clamping structure of the wedge block.

[0017] Figure 3 A side view of the fixture.

[0018] In the figure: 1. upper base; 2. upper adapter; 3. side plate; 4. wedge block; 5. fixing block; 6. lower base. DETAILED DESCRIPTION

[0019] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0020] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "circumferential", "radial" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0021] In this application, 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 connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0022] Reference Figure 1-Figure 3 , a fixture structure for equivalent blade centrifugal load, comprising a lower base 6, a fixing block 5, a wedge block 4, an upper adapter 2 and an upper base 1 which are arranged in sequence from bottom to top;

[0023] The fixing block 5 is provided with a mortise and tenon which matches with the tenon of the blade. The wedge blocks 4 are divided into two groups, and the adjacent end faces of the two groups of wedge blocks 4 form a clamping space which matches with the blade body. The wedge blocks 4 are connected to the upper adapter 2 through the side plates 3.

[0024] The upper base 1 and the lower base 6 are provided with through holes for bolts to pass through, and the stretching machine is respectively connected to the upper base 1 and the lower base 6 by bolts; the upper adapter 2 is fixedly set on the lower base 6 by a bolt group, and the wedge block 4 is connected to the upper adapter 2 by the side plate 3 and the bolt group; the fixing block 5 is fixedly set above the lower base 6 by a bolt group.

[0025] The structure formed by combining the wedge block 4, the upper adapter 2 and the upper base 1 fixes the blade body part of the blade; the structure formed by combining the lower base 6 and the fixing block 5 fixes the tenon part of the blade.

[0026] The wedge block 4 is used to adjust the angle between the blade axis and the geometric profile, and is mainly used to simulate the bending stress caused by centrifugal force.

[0027] In other preferred embodiments, the upper base 1 includes an upper fixing plate and an upper clamping plate, the upper clamping plate is fixedly connected to the upper fixing plate, a mounting groove is provided at the bottom of the upper clamping plate, and the upper adapter 2 is connected to the upper clamping plate through the mounting groove; the side wall of the mounting groove and the upper adapter 2 are provided with mounting holes.

[0028] Among them, the upper adapter 2 includes an upper vertical plate, a horizontal plate and a lower vertical plate arranged from top to bottom. The plane where the upper vertical plate is located is perpendicular to the plane where the lower vertical plate is located. The upper vertical plate is adapted to the installation groove, and the lower vertical plate is connected to the two side plates 3.

[0029] In other preferred embodiments, an arc-shaped groove is formed on the working surface of the wedge-shaped block 4, and the arc-shaped grooves of the two wedge-shaped blocks 4 are respectively matched with the two end surfaces of the blade body.

[0030] In other preferred embodiments, the lower base 6 includes a lower fixed plate and a lower clamping plate, the lower clamping plate is fixedly connected to the lower fixed plate, a mounting groove is provided at the bottom of the lower clamping plate, and the fixing block 5 is connected to the lower clamping plate through the mounting groove; the side wall of the mounting groove and the fixing block 5 are provided with mounting holes.

[0031] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A fixture structure for equivalent blade centrifugal load, characterized in that: It includes a lower base, a fixing block, a wedge block, an upper adapter and an upper base which are arranged in sequence from bottom to top; The fixing block is provided with a mortise and tenon which matches with the tenon of the blade. The wedge blocks are divided into two groups, and the adjacent end faces of the two groups of wedge blocks form a clamping space which matches with the blade body. The wedge blocks are connected with the upper adapter through the side plates.

2. The fixture structure for equivalent blade centrifugal load according to claim 1, characterized in that: The upper base includes an upper fixing plate and an upper clamping plate, wherein the upper clamping plate is fixedly connected to the upper fixing plate, a mounting groove is provided at the bottom of the upper clamping plate, and the upper adapter is connected to the upper clamping plate through the mounting groove; mounting holes are provided through the side walls of the mounting groove and the upper adapter.

3. The fixture structure for equivalent blade centrifugal load according to claim 2, characterized in that: The upper adapter includes an upper vertical plate, a horizontal plate and a lower vertical plate arranged from top to bottom. The plane where the upper vertical plate is located is perpendicular to the plane where the lower vertical plate is located. The upper vertical plate is adapted to the installation groove, and the lower vertical plate is connected to the two side plates.

4. The fixture structure for equivalent blade centrifugal load according to claim 1, characterized in that: The working surface of the wedge-shaped block is provided with an arc groove, and the arc grooves of the two wedge-shaped blocks are respectively matched with the two end surfaces of the blade body.

5. The fixture structure for equivalent blade centrifugal load according to claim 1, characterized in that: The lower base includes a lower fixing plate and a lower clamping plate, the lower clamping plate is fixedly connected to the lower fixing plate, a mounting groove is provided at the bottom of the lower clamping plate, and the fixing block is connected to the lower clamping plate through the mounting groove; the side wall of the mounting groove and the fixing block are provided with mounting holes.

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