Over-rotation test piece and over-rotation test piece installation tool and method

Abstract

The invention aims to provide an over-rotation test piece, an over-rotation test piece mounting tool and an over-rotation test piece mounting method. The over-rotation test piece comprises a turbine disc unit, a plurality of blade units and a baffle ring. The turbine disc unit comprises a plurality of mortises formed along the disc circumference, the blade units comprise tenons and balancing weights, the tenons and the tenons of real blades are of the same structure, and the weight and the mass center position of the balancing weights are consistent with the blade bodies of the real blades. The tenons of the multiple blade units are installed on the periphery of the turbine disc unit through the mortises in the circumferential direction, and the baffle rings are arranged at one ends of the mortises to limit the tenons to be disengaged from the mortises in the first direction. Through the over-rotation test piece, the test cost of an over-rotation test can be reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of gas turbine engines, and in particular to an overspeed test piece, an overspeed test piece installation tool and a method. Background Art

[0002] The low-pressure turbine rotor is composed of a multi-stage rotor, each stage of the rotor is composed of a turbine disk 90, blades 91 and an open retaining ring 92, such as Figure 1 As shown, the inner side of the blade 91 adopts a tenon structure 93 to cooperate with the tenon groove on the turbine disk, and the outer side adopts a serrated blade crown to engage with each other. The open retaining ring 92 is installed between the turbine disk 90 and the blade 91 (moving blade) to prevent the blade 91 from falling off the turbine disk 90.

[0003] Since the outer side of the turbine blades uses a serrated blade crown, they are interlocked and become one with the turbine disk, and will not fall off the turbine disk during the flipping process. The turbine disk is a key component of the aircraft engine turbine rotor. According to airworthiness requirements, an overspeed test is required. The turbine rotor components are equipped with blades or blade counterweights on the test bench. The overspeed test is carried out at 120% of its maximum allowable speed and the load is maintained for 5 minutes. After the test, the parts are required to be free of cracks. Due to the complex structure of turbine blades and the difficulty of processing, the cost of using real blades for overspeed test pieces is relatively high.

[0004] How to provide a low-cost superrotation test piece is a problem that needs to be solved urgently. Summary of the invention

[0005] The object of the present invention is to provide an over-rotation test piece capable of reducing the test cost of the over-rotation test.

[0006] The super-rotation test piece for achieving the above-mentioned purpose comprises:

[0007] The turbine disk unit comprises a plurality of tongues and grooves provided along the circumference of the disk;

[0008] A plurality of blade units, including a tenon and a counterweight, wherein the tenon has the same structure as the tenon of a real blade, the weight and the center of mass position of the counterweight are consistent with those of the blade body of the real blade, and the tenons of the plurality of blade units are circumferentially mounted on the outer periphery of the turbine disk unit through the tenon groove; and

[0009] A retaining ring is arranged at one end of the tenon groove to limit the tenon from coming out of the tenon groove along a first direction.

[0010] In one or more embodiments, the counterweight block is in the shape of a rectangular block.

[0011] On the other hand, according to some embodiments of the present application, a super-rotation test piece installation tool is also provided, which is characterized in that it is used to flip and assemble the super-rotation test piece as described above, and the super-rotation test piece installation tool includes an annular opening and a mounting portion, and the annular opening can be sleeved on the outer periphery of the plurality of blade units installed in the turbine disk unit. In the sleeved state, the mounting portion is aligned with the mounting edge of the turbine disk unit to allow the mounting portion to be fixedly connected to the mounting edge by fasteners.

[0012] In one or more embodiments, the super-rotation test piece installation tool comprises a first annular portion, a second annular portion and an annular connecting portion, wherein the annular connecting portion connects the outer edge of the first annular portion with the outer edge of the second annular portion, and the first annular portion, the second annular portion and the annular connecting portion are located outside the annular opening;

[0013] Wherein, an annular mounting edge is arranged along the radial inner side of the first annular portion, and the mounting portion is a through hole opened along the annular mounting edge.

[0014] In one or more embodiments, the superrotation test piece installation tool is a ring-shaped piece formed by splicing a plurality of petals.

[0015] In one or more embodiments, the cross-section of the super-rotation test piece mounting fixture is U-shaped.

[0016] On the other hand, according to some embodiments of the present application, a method for installing a super-rotation test piece is provided, characterized in that the super-rotation test piece is assembled using the super-rotation test piece installation tool as described above, comprising the following steps:

[0017] a. inserting the tenons of the plurality of blade units into the tenon grooves respectively along the first direction;

[0018] b. installing the retaining ring between the turbine disk unit and the plurality of blade units;

[0019] c. The annular opening of the super-rotation test piece installation tool is sleeved on the outer periphery of the plurality of blade units, and the mounting portion is fixedly connected to the mounting edge by fasteners to form an assembly unit body;

[0020] d. The assembly unit is flipped 180 degrees and then installed in the super-rotation test piece. During the flipping process, the super-rotation test piece installation tool restricts the tenon of the blade unit from coming out of the tenon groove along the second direction, and the second direction is opposite to the first direction;

[0021] e. After removing the fasteners, remove the over-speed test piece installation tool from the turbine disk unit.

[0022] In one or more embodiments, the super-rotation test piece includes a multi-stage turbine disk unit and a blade unit, and the super-rotation test piece is assembled step by step using steps a to e.

[0023] In one or more embodiments, the super-rotation test piece installation tool is an annular piece formed by splicing a plurality of petals. In the step e, the plurality of petals are removed from the turbine disk unit respectively in the radial direction.

[0024] In one or more embodiments, the fasteners are bolts and nuts.

[0025] The beneficial effects of the present invention are:

[0026] The super-rotation test piece with this configuration uses a counterweight block to simulate the blade configuration, thereby solving the problem of high cost of testing with real blades. At the same time, the weight and center of mass position of the counterweight block are consistent with the weight and center of mass of the blade body part of the real blade, which can ensure the authenticity and reliability of the test.

[0027] Since the super-rotation test piece uses a counterweight block to replace the blade body, the non-serrated blade crown on the outer side of the blade is engaged with the turbine disk to become one with it. Through the above-mentioned super-rotation test piece installation tooling and installation method, it is possible to prevent the blade unit from being detached from the super-rotation test piece installation tooling fixed on the turbine disk unit when the super-rotation test piece is flipped during the installation process, thereby preventing the blade unit from falling off the turbine disk unit, thereby ensuring the safety of the test.

[0028] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Moreover, the same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0030] Figure 1 A schematic diagram showing a conventional turbine disc structure is shown;

[0031] Figure 2 A half-section schematic diagram of some embodiments of the super-rotation test piece is shown;

[0032] Figure 3 Shows a three-dimensional schematic diagram of some embodiments of the super-rotation test piece;

[0033] Figure 4 A three-dimensional schematic diagram of some embodiments of the super-rotation test piece installation tooling in an installed state is shown;

[0034] Figures 5 to 8 A schematic diagram of the assembly process according to the super-rotation test piece installation method is shown. DETAILED DESCRIPTION

[0035] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0037] In order to reduce the cost of the super rotation test, on the one hand, according to some embodiments of the present application, a super rotation test piece is provided. Figure 2 shows a half-section schematic diagram of some embodiments of the super-rotation test piece, Figure 3 The three-dimensional schematic diagram of some embodiments of the super-rotation test piece is shown, and the super-rotation test piece includes a turbine disk unit 1, a plurality of blade units 2, and a retaining ring 3. A mortise 10 is provided in the circumference of the turbine disk unit 1, and each blade unit 2 includes a tenon 20 and a counterweight 21. The tenon 20 has the same structure as the tenon of a real blade, and the weight and center of mass position of the counterweight 21 are consistent with the weight and center of mass of the blade body of a real blade, so that a real blade can be simulated by a counterweight having a real tenon structure. The tenons 20 of the plurality of blade units 2 are circumferentially installed on the outer periphery of the turbine disk unit 2 through the tenon 10. The retaining ring 3 is arranged at one end of the tenon 10 to limit the tenon 20 from coming out of the tenon 10 in a first direction. It can be understood that the first direction can be understood as the insertion direction of the tenon 20 when it is installed in the tenon 10.

[0038] The super-rotation test piece with this configuration uses a counterweight block to simulate the blade configuration, thereby solving the problem of high cost of testing with real blades. At the same time, the weight and center of mass position of the counterweight block are consistent with the weight and center of mass of the blade body part of the real blade, which can ensure the authenticity and reliability of the test.

[0039] In some specific embodiments, a sealing ring 4 is further provided on the turbine disk unit 1 .

[0040] In some embodiments of the present super-rotation test piece, the counterweight block 21 is in the shape of a rectangular block. The counterweight block 21 in the shape of a rectangular block is easier to process and easier to determine the position of its center of mass, thereby further reducing the test cost.

[0041] In some other embodiments different from those shown in the figures, the counterweight block 21 may also be in other shapes that are convenient for processing.

[0042] In order to realize the assembly of the super-rotation test piece provided in one or more of the above embodiments, on the other hand, according to some embodiments of the present application, a super-rotation test piece installation tool is also provided. Figure 4 A three-dimensional schematic diagram of the installation state of some embodiments of the superrotation test piece installation tooling is shown. The superrotation test piece installation tooling 5 is used to flip and assemble the superrotation test piece as described above. The superrotation test piece installation tooling 5 includes an annular opening 50 and a mounting portion 51. The annular opening 50 can be sleeved on the outer periphery of a plurality of blade units 2 installed in the turbine disk unit 1. In the sleeved state, the mounting portion 51 is aligned with the mounting edge 11 of the turbine disk unit 1 to allow the mounting portion 51 to be fixedly connected to the mounting edge 11 by the fastener 6.

[0043] On the other hand, according to some embodiments of the present application, a method for installing a super-rotation test piece is provided, wherein the super-rotation test piece is assembled using the super-rotation test piece installation tooling described above. Figures 5 to 7 The schematic diagram of the process of assembling the super-rotation test piece according to the installation method of the super-rotation test piece is shown, which includes the following steps:

[0044] a. Figure 5 As shown, the tenons 20 of the plurality of blade units 2 are respectively inserted into the tenon grooves 10 along a first direction;

[0045] b. The retaining ring 3 is installed between the turbine disk unit 1 and the plurality of blade units 2;

[0046] c. Figure 6 As shown, the annular opening 50 of the super-rotation test piece installation tool 5 is sleeved on the outer periphery of the plurality of blade units 2, and the installation portion is fixedly connected to the installation edge 11 by the fastener 6 to form an assembly unit body;

[0047] d. Figure 7 As shown in the figure, turn the assembly unit 180 degrees and install it into the super-rotation test piece. Figure 8 As shown, during the flipping process, the super-rotation test piece installation tool 5 restricts the tenon 20 of the blade unit 2 from escaping from the tenon groove 10 along the second direction, which is opposite to the first direction, that is, the second direction is a disassembly direction opposite to the installation direction.

[0048] e. After removing the fastener 6 , remove the over-speed test piece installation tool 5 from the turbine disk unit 1 .

[0049] Since the super-rotation test piece uses a counterweight block 21 to replace the blade body, the non-serrated blade crown on the outer side of the blade is engaged with the turbine disk to become a whole. Through the above-mentioned super-rotation test piece installation tooling and installation method, it is possible to prevent the blade unit 2 from being detached from the super-rotation test piece installation tooling 5 fixed on the turbine disk unit 1 when the super-rotation test piece is flipped during the installation process, thereby preventing the blade unit 2 from falling off the turbine disk unit 1, thereby ensuring the safety of the test.

[0050] In a specific embodiment, the annular opening 50 is a circular ring that matches the shape of the counterweight 21 . In the installed state, the counterweight 21 is entirely accommodated in the annular opening 50 .

[0051] In some embodiments of the super-rotation test piece installation tool, the super-rotation test piece 5 installation tool includes a first annular portion 501, a second annular portion 502, and an annular connecting portion 503. The annular connecting portion 503 connects the outer edge of the first annular portion 501 with the outer edge of the second annular portion 502. The first annular portion 501, the second annular portion 502, and the annular connecting portion 503 form an annular opening 50. An annular mounting edge 504 is provided along the radial inner side of the first annular portion 501, and the mounting portion 51 is a through hole opened along the annular mounting edge 504.

[0052] In some embodiments of the super-rotation test piece installation tool, the super-rotation test piece installation tool 5 is a ring-shaped member formed by splicing multiple petals. Further, in step e, the multiple petals can be removed from the turbine disk unit in the radial direction, thereby saving the time required for disassembling the super-rotation test piece installation tool and simplifying the test steps.

[0053] In some embodiments of the super-rotation test piece installation tool, the cross-section of the super-rotation test piece installation tool is U-shaped, and the opening of the U-shape is the annular opening 50 .

[0054] In some embodiments of the superrotation test piece installation method, Figure 8 As shown, the super-rotation test piece includes a multi-stage turbine disk unit 1 and a blade unit 2, and the super-rotation test piece is assembled step by step using steps a to e.

[0055] In some embodiments of the super-rotation test piece installation method, the fasteners 6 are bolts and nuts.

[0056] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0057] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0058] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "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 an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0059] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A super rotation test piece, characterized in that: include: The turbine disk unit comprises a plurality of tongues and grooves provided along the circumference of the disk; A plurality of blade units, including a tenon and a counterweight block, wherein the tenon has the same structure as the tenon of a real blade, the weight and the center of mass position of the counterweight block are consistent with the blade body of the real blade, and the tenons of the plurality of blade units are circumferentially mounted on the outer periphery of the turbine disk unit through the tenon groove; as well as A retaining ring is arranged at one end of the tenon groove to limit the tenon from coming out of the tenon groove along a first direction.

2. The superrotation test piece according to claim 1, characterized in that: The counterweight block is in a rectangular block shape.

3. A super-rotation test piece installation tool, characterized in that: Used to flip and assemble the super-rotation test piece as described in any one of claims 1 to 2, the super-rotation test piece installation tool includes an annular opening and a mounting portion, the annular opening can be sleeved on the outer periphery of a plurality of the blade units installed in the turbine disk unit, and in the sleeved state, the mounting portion is aligned with the mounting edge of the turbine disk unit to allow the mounting portion to be fixedly connected to the mounting edge by fasteners.

4. The super-rotation test piece installation tool as claimed in claim 3, characterized in that: The super-rotation test piece installation tool comprises a first annular portion, a second annular portion and an annular connecting portion, wherein the annular connecting portion connects the outer edge of the first annular portion with the outer edge of the second annular portion, and the first annular portion, the second annular portion and the annular connecting portion are located outside the annular opening; Wherein, an annular mounting edge is arranged along the radial inner side of the first annular portion, and the mounting portion is a through hole opened along the annular mounting edge.

5. The super-rotation test piece installation tool as claimed in claim 4, characterized in that: The super-rotation test piece installation tool is a ring-shaped piece formed by splicing a plurality of petals.

6. The super-rotation test piece installation tool as claimed in claim 3, characterized in that: The cross section of the super-rotation test piece installation tool is U-shaped.

7. A method for installing a super-rotation test piece, characterized in that: Assembling the super-rotation test piece using the super-rotation test piece installation tool as described in any one of claims 3 to 6 comprises the following steps: a. inserting the tenons of the plurality of blade units into the tenon grooves respectively along the first direction; b. installing the retaining ring between the turbine disk unit and the plurality of blade units; c. The annular opening of the super-rotation test piece installation tool is sleeved on the outer periphery of the plurality of blade units, and the mounting portion is fixedly connected to the mounting edge by fasteners to form an assembly unit body; d. The assembly unit is flipped 180 degrees and then installed in the super-rotation test piece. During the flipping process, the super-rotation test piece installation tool restricts the tenon of the blade unit from coming out of the tenon groove along the second direction, and the second direction is opposite to the first direction; e. After removing the fasteners, remove the over-speed test piece installation tool from the turbine disk unit.

8. The method for installing a super-rotation test piece according to claim 7, characterized in that: The super-rotation test piece includes a multi-stage turbine disk unit and a blade unit, and the super-rotation test piece is assembled step by step using steps a to e.

9. The method for installing a super-rotation test piece according to claim 7, characterized in that: The super-rotation test piece installation tool is a ring-shaped piece formed by splicing a plurality of petals. In step e, the plurality of petals are removed from the turbine disk unit respectively along the radial direction.

10. The method for installing a super-rotation test piece according to claim 7, characterized in that: The fasteners are bolts and nuts.

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