A measuring device and usage method for the combined runout of a rotor

Abstract

The present invention belongs to the field of rotor measurement technology, and discloses a device for measuring the vibration of a rotor assembly and a method for using the device. The device comprises a first bracket, a second bracket, and a third bracket, wherein arc-shaped support surfaces of equal height are respectively provided on the tops of the first bracket, the second bracket, and the third bracket, a first adjusting roller is fixedly provided on the first bracket, a second adjusting roller is fixedly provided on the third bracket, a low-pressure turbine rotor to be measured is provided on the first bracket and the second bracket, and a low-pressure compressor rotor to be measured is provided on the third bracket, and shaft cavity nuts are respectively fixedly provided at the centers of the low-pressure turbine rotor to be measured and the low-pressure compressor rotor, and the low-pressure compressor rotor and the low-pressure turbine rotor are matched with the shaft cavity nuts through the low-pressure turbine shaft. The low-pressure compressor rotor and the low-pressure turbine rotor are ensured to be concentric and coaxial, avoiding manual alignment, repeated disassembly and adjustment, which may cause damage to the parts, reducing the difficulty of operation during measurement, and improving the detection efficiency.

Description

Technical Field

[0001] The present invention belongs to the technical field of rotor measurement, and in particular relates to a device for measuring rotor assembly runout and a method for using the device. Background Art

[0002] The gas generator is approximately 4,300 mm long, with the low-pressure compressor and low-pressure turbine rotor assembly running through almost the entirety of the gas generator. When the engine is running, the rotor assembly rotates at the same speed. Ensuring concentricity during high-speed operation is a critical and challenging step in engine assembly. Currently, rotor assembly runout inspections, such as face runout, circular runout, and coaxiality, are performed using a conventional lathe as a reference surface, aided by fixtures, steady rests, and runout gauges. Runout inspections require extensive preparatory work, complex and time-consuming installation of process equipment, and can easily damage components. When inspecting runout, such as circular runout, face runout, and coaxiality, the axis of the low-pressure turbine and low-pressure compressor rotors can easily deviate from the horizontal line, making runout measurement difficult and resulting in inaccurate values. Operators must repeatedly disassemble and assemble the low-pressure compressor and low-pressure turbine rotors, constantly adjusting them to obtain accurate measurements. This adjustment process can easily damage components. The measurement process is cumbersome, challenging, and inefficient. Summary of the Invention

[0003] The purpose of the present invention is to provide a device and method for measuring rotor assembly runout to solve the problems in the prior art;

[0004] In order to achieve the above object, the present invention provides the following technical solutions:

[0005] A device for measuring the vibration of a rotor combination includes a first bracket, a second bracket and a third bracket, wherein arc-shaped support surfaces of equal height are respectively provided on the tops of the first bracket, the second bracket and the third bracket, a first adjusting roller is fixedly provided on the first bracket, and a second adjusting roller is fixedly provided on the third bracket, a low-pressure turbine rotor to be measured is provided on the first bracket and the second bracket, and a low-pressure compressor rotor to be measured is provided on the third bracket, shaft cavity nuts are respectively fixedly provided at the centers of the low-pressure turbine rotor to be measured and the low-pressure compressor rotor, and the low-pressure compressor rotor and the low-pressure turbine rotor are matched with the shaft cavity nut through the low-pressure turbine shaft.

[0006] Furthermore, the first adjusting roller and the second adjusting roller each include a fixing portion and an adjusting portion, the fixing portion being fixedly connected to the outer sides of the first bracket and the second bracket respectively, and the adjusting portion being fixedly connected to the fixing portion.

[0007] Furthermore, an adjusting rod is provided on the top of the adjustment portion, and one end of the adjusting rod is in contact with and connected to the low-pressure turbine rotor and the low-pressure compressor rotor to be measured.

[0008] Furthermore, the outer wall of the shaft cavity nut is transitionally matched with the hole wall of the central hole of the low-pressure turbine rotor and the low-pressure compressor rotor respectively.

[0009] Furthermore, it also includes a dynamic ring, which is arranged at one end surface of the low-pressure compressor rotor and fixedly connected to the central shaft neck of the low-pressure compressor rotor.

[0010] Furthermore, it also includes an inter-shaft sealing sleeve, which is fixedly arranged inside the shaft neck of the low-pressure compressor rotor.

[0011] Furthermore, threads matching with the shaft cavity nuts are provided at both ends of the low-pressure turbine shaft.

[0012] A method for using a device for measuring rotor assembly runout, comprising:

[0013] A first bracket, a second bracket, and a third bracket are arranged on a horizontal ground or a horizontal measuring platform, and shaft cavity nuts are respectively arranged inside the first bracket, the second bracket, and the third bracket;

[0014] A journal on one side of the low-pressure turbine rotor is arranged on the arc-shaped support surface of the first bracket, and a journal on the other side of the low-pressure turbine rotor is arranged on the second bracket;

[0015] A shaft neck on one side of the low-pressure compressor rotor is set on the third bracket, and then the low-pressure turbine shaft is threadedly connected to the shaft cavity nuts in the low-pressure turbine rotor and the low-pressure compressor rotor respectively to measure the combined vibration of the low-pressure turbine rotor and the low-pressure compressor rotor.

[0016] Furthermore, when the turbine shaft is respectively matched with the low-pressure turbine rotor and the low-pressure compressor rotor to be measured, the axes of the low-pressure compressor rotor, the low-pressure turbine shaft rotor and the low-pressure turbine shaft are on the same horizontal straight line.

[0017] Furthermore, when measuring the runout of the rotor assembly, the axis of the low-pressure turbine shaft is automatically aligned by the center stand.

[0018] Compared with the prior art, the advantages of the present invention are:

[0019] The present invention provides a device for measuring the combined rotor runout, which is structured through a first bracket, a second bracket and a third bracket, and wherein shaft cavity nuts are respectively arranged in the centers of the first bracket, the second bracket and the third bracket, and arc-shaped supporting surfaces of equal height are arranged on the tops of the first bracket, the second bracket and the third bracket, and the low-pressure compressor rotor and the low-pressure turbine rotor are connected through the turbine shaft, so that when the low-pressure compressor rotor and the low-pressure turbine rotor to be measured are placed on the first bracket, the second bracket and the third bracket for measurement, the heights of the centers of the low-pressure compressor rotor and the low-pressure turbine rotor are on the same horizontal line, ensuring that the low-pressure compressor rotor and the low-pressure turbine rotor are concentric and coaxial, avoiding manual alignment, repeated disassembly and adjustment, which may cause damage to parts, reducing the difficulty of operation during measurement, and improving detection efficiency; at the same time, through the structure of the first adjusting roller and the second adjusting roller, axial movement of the low-pressure turbine rotor and the low-pressure pressure rotor to be measured is avoided, further ensuring the accuracy of the measured rotors such as end face runout, circular runout, and coaxiality.

[0020] Furthermore, through the method of using the rotor combination runout measuring device of the present invention, when measuring the circular runout, end face runout and coaxiality of the low-pressure compressor rotor and the low-pressure turbine shaft rotor, it is avoided that the operator repeatedly disassembles and assembles the rotor and makes continuous adjustments during the measurement process, causing collision damage to the low-pressure compressor rotor and the low-pressure turbine rotor and the parts matching them, resulting in great operating difficulty and low measurement efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0022] In the attached figure:

[0023] Figure 1 This is a schematic diagram of the overall structure of a device for measuring rotor assembly runout according to the present invention;

[0024] Among them: a first bracket 1, a second bracket 2, a third bracket 3, a first adjusting roller 4, a second adjusting roller 5, a low-pressure turbine shaft 6, a low-pressure turbine rotor 7, and a low-pressure compressor rotor 8. DETAILED DESCRIPTION

[0025] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments. It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other.

[0026] The following detailed description is an exemplary description and is intended to provide further detailed description of the present invention. Unless otherwise indicated, all technical terms used in the present invention have the same meaning as those generally understood by those skilled in the art to which the present invention belongs. The terms used in the present invention are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention.

[0027] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" 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 invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more. In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0028] The present invention takes the low-pressure compressor rotor 8 and the low-pressure turbine rotor 7 as examples to illustrate the device and method of use of the present invention. When performing the rotor assembly runout measurement of the present invention, the main runouts measured are end face runout, circular runout, coaxiality and the flexible deformation of the rotor. Specifically, Figure 1As shown, it includes a first bracket 1, a second bracket 2 and a third bracket 3. The tops of the first bracket 1, the second bracket 2 and the third bracket 3 are respectively provided with arc-shaped supporting surfaces of equal height. Preferably, the curvature and arc shape of the supporting surfaces are consistent with the curvature of the supported rotor shaft neck, such as the curvature of the arc-shaped supporting surfaces of the first bracket 1 and the second bracket 2 is consistent with the shaft neck of the low-pressure turbine rotor 7, and the curvature of the arc-shaped supporting surface on the third bracket 3 is consistent with the curvature of the low-pressure compressor rotor 8; a first adjusting roller 4 is fixedly provided on the first bracket 1, and a second adjusting roller 5 is fixedly provided on the third bracket 3. The low-pressure turbine rotor 7 to be measured is provided on the first bracket 1 and the second bracket 2, and the low-pressure compressor rotor 8 to be measured is provided on the third bracket 3. The centers of the low-pressure turbine rotor 7 to be measured and the low-pressure compressor rotor 8 are respectively fixed with shaft cavity nuts, and the low-pressure compressor rotor 8 and the low-pressure turbine rotor 7 are matched with the shaft cavity nuts through the low-pressure turbine shaft 6.

[0029] Specifically, when the low-pressure compressor rotor 8 and the low-pressure turbine rotor 7 are arranged on the first bracket 1, the second bracket 2 and the third bracket 3, the rear journal of the low-pressure turbine rotor 7 is placed on the arc-shaped support surface at the top of the first bracket 1, the front journal of the low-pressure turbine rotor 7 is arranged on the arc-shaped support surface at the top of the second bracket 2, and the front journal of the low-pressure compressor rotor 8 is arranged on the arc-shaped support surface at the top of the third bracket 3. The rear journal of the low-pressure compressor rotor 8 and the front journal of the low-pressure turbine rotor 7 are fixedly connected via the low-pressure turbine shaft 6; adjustable rollers are respectively provided on the outside of the first bracket 1 and the third bracket 3 to prevent the rotor assembly formed by the low-pressure compressor rotor 8 and the low-pressure turbine rotor 7 from axial movement; a crossbeam simulating the front mounting flange surface of the front casing is designed to facilitate the installation and tightening of the sleeve nut. When measuring the rotor assembly, the second bracket 2 is removed, and the axis of the assembly rotor is automatically aligned by the center frame, and alignment can be achieved without subsequent adjustment, avoiding the time-consuming and labor-intensive alignment by the measurement personnel, which may cause damage to the components. The measurement process is cumbersome, difficult to operate and inefficient.

[0030] Specifically, the first adjusting roller 4 and the second adjusting roller 5 each include a fixed part and a regulating part. The fixed part is fixedly connected to the outer sides of the first bracket 1 and the second bracket 2, respectively. The regulating part is fixedly connected to the fixed part. An adjusting rod is provided on the top of the regulating part. One end of the adjusting rod is in contact with and connected to the low-pressure turbine rotor 7 and the low-pressure compressor rotor 8 to be measured.

[0031] Preferably, the outer wall of the shaft cavity nut is transitionally matched with the hole wall of the center hole of the low-pressure turbine rotor 7 and the low-pressure compressor rotor 8 respectively. Such an arrangement ensures that when the low-pressure turbine shaft 6 and the shaft cavity nut are matched, the threaded connection between the low-pressure turbine shaft 6 and the shaft cavity nut can be guaranteed, while avoiding the relative movement of the shaft cavity nut in the low-pressure compressor rotor 8 and the low-pressure turbine rotor 7, which causes the problem that the low-pressure turbine shaft 6 and the shaft cavity nut cannot be connected.

[0032] Specifically, it also includes a dynamic ring, which is arranged at one end surface of the low-pressure compressor rotor 8 and fixedly connected to the central journal of the low-pressure compressor rotor 8.

[0033] Specifically, it also includes an inter-shaft sealing sleeve, which is fixedly arranged inside the shaft neck of the low-pressure compressor rotor 8.

[0034] Specifically, both ends of the low-pressure turbine shaft 6 are provided with threads that match the shaft cavity nuts.

[0035] A method for using a rotor assembly runout measuring device of the present invention includes:

[0036] A first bracket 1, a second bracket 2 and a third bracket 3 are arranged on a horizontal ground or a horizontal measuring platform, and shaft cavity nuts are respectively arranged inside the first bracket 1, the second bracket 2 and the third bracket 3; a shaft neck on one side of the low-pressure turbine rotor 7 is arranged on the arc-shaped supporting surface of the first bracket 1, and a shaft neck on the other side of the low-pressure turbine rotor 7 is arranged on the second bracket 2; a shaft neck on one side of the low-pressure compressor rotor 8 is arranged on the third bracket 3, and then the low-pressure turbine shaft 6 is threadedly connected to the shaft cavity nuts in the low-pressure turbine rotor 7 and the low-pressure compressor rotor 8, respectively, to measure the combined vibration of the low-pressure turbine rotor 7 and the low-pressure compressor rotor 8.

[0037] Specifically, after the turbine shaft is matched with the low-pressure turbine rotor 7 and the low-pressure compressor rotor 8 to be measured, the axes of the low-pressure turbine rotor 7, the low-pressure compressor rotor 8 and the turbine shaft are in the same horizontal straight line.

[0038] Specifically, when measuring the runout of the rotor assembly, the axis of the low-pressure turbine shaft 6 is automatically aligned by the center stand.

[0039] The principle of the present invention is as follows: a low-pressure turbine rotor 7 is arranged on a first bracket 1, a low-pressure compressor rotor 8 is arranged on a second bracket 2, and the shaft neck on one side of the low-pressure turbine rotor 7 on the first bracket 1 is arranged on the first bracket 1, and the shaft neck on the other side of the low-pressure turbine rotor 7 is arranged on the second bracket 2; the shaft neck on one side of the low-pressure compressor rotor 8 is arranged on the third bracket 3, and shaft cavity nuts are respectively arranged in the center holes of the low-pressure turbine rotor 7 and the low-pressure compressor rotor 8, so that the low-pressure turbine rotor 7 and the low-pressure compressor rotor 8 are matched with the shaft cavity nuts through the low-pressure turbine shaft 6, so that the axes of the low-pressure turbine rotor 7 and the low-pressure compressor rotor 8 are on the same horizontal line, thereby realizing rapid alignment of the low-pressure turbine rotor 7 and the low-pressure compressor rotor 8. At the same time, when the low-pressure turbine rotor 7 and the low-pressure compressor rotor 8 are matched with the shaft cavity nut using the low-pressure turbine shaft 6, a dynamic ring and an inter-shaft sealing sleeve are provided on the low-pressure turbine shaft 6 for measuring the end face runout of the low-pressure turbine rotor 7 and the low-pressure compressor rotor 8.

[0040] It is understood from common technical knowledge that the present invention may be implemented by other embodiments that do not depart from its spirit or essential features. Therefore, the embodiments disclosed above are, in all respects, merely illustrative and not exclusive. All modifications within the scope of the present invention or equivalent to the scope of the present invention are intended to be encompassed by the present invention.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be covered by the scope of protection of the claims of the present invention.

Claims

1. A device for measuring rotor assembly runout, characterized in that: The invention comprises a first bracket (1), a second bracket (2) and a third bracket (3), wherein arc-shaped supporting surfaces of equal height are respectively provided on the tops of the first bracket (1), the second bracket (2) and the third bracket (3), a first adjusting roller (4) is fixedly provided on the first bracket (1), and a second adjusting roller (5) is fixedly provided on the third bracket (3), a low-pressure turbine rotor (7) to be measured is provided on the first bracket (1) and the second bracket (2), and a low-pressure compressor rotor (8) to be measured is provided on the third bracket (3), and shaft cavity nuts are respectively fixedly provided at the centers of the low-pressure turbine rotor (7) to be measured and the low-pressure compressor rotor (8), and the low-pressure compressor rotor (8) and the low-pressure turbine rotor (7) are matched with the shaft cavity nut through the low-pressure turbine shaft (6).

2. The device for measuring rotor assembly runout according to claim 1, characterized in that: The first adjusting roller (4) and the second adjusting roller (5) both comprise a fixing portion and an adjusting portion, the fixing portions being fixedly connected to the outer sides of the first bracket (1) and the second bracket (2), respectively, and the adjusting portion being fixedly connected to the fixing portions.

3. The device for measuring rotor assembly runout according to claim 2, characterized in that: An adjusting rod is provided on the top of the adjustment portion, and one end of the adjusting rod is in contact with and connected to the low-pressure turbine rotor (7) and the low-pressure compressor rotor (8) to be measured.

4. The device for measuring rotor assembly runout according to claim 1, characterized in that: The outer wall of the shaft cavity nut is transitionally matched with the hole walls of the center holes of the low-pressure turbine rotor (7) and the low-pressure compressor rotor (8).

5. The device for measuring rotor assembly runout according to claim 1, characterized in that: It also includes a dynamic ring, which is arranged at one end surface of the low-pressure compressor rotor (8) and is fixedly connected to the central journal of the low-pressure compressor rotor (8).

6. The device for measuring rotor assembly runout according to claim 1, characterized in that: It also includes an inter-shaft sealing sleeve, which is fixedly arranged inside the shaft neck of the low-pressure compressor rotor (8).

7. The device for measuring rotor assembly runout according to claim 1, characterized in that: Both ends of the low-pressure turbine shaft (6) are provided with threads that match the shaft cavity nut.

8. A method for using the rotor assembly runout measuring device according to claim 1, characterized in that: include, A first bracket (1), a second bracket (2), and a third bracket (3) are arranged on a horizontal ground or a horizontal measuring platform, and shaft cavity nuts are respectively arranged inside the first bracket (1), the second bracket (2), and the third bracket (3); A journal on one side of the low-pressure turbine rotor (7) is provided on the arc-shaped support surface of the first bracket (1), and a journal on the other side of the low-pressure turbine rotor (7) is provided on the second bracket (2); A journal on one side of the low-pressure compressor rotor (8) is provided on the third bracket (3), and then the low-pressure turbine shaft (6) is threadedly connected to the shaft cavity nuts in the low-pressure turbine rotor (7) and the low-pressure compressor rotor (8), respectively, to measure the combined runout of the low-pressure turbine rotor (7) and the low-pressure compressor rotor (8).

9. The method for using the device for measuring rotor assembly runout according to claim 8, characterized in that: When the turbine shaft is respectively matched with the low-pressure turbine rotor (7) and the low-pressure compressor rotor (8) to be measured, the axes of the low-pressure compressor rotor (8), the low-pressure turbine shaft (6) rotor and the low-pressure turbine shaft (6) are on the same horizontal straight line.

10. The method for using the device for measuring rotor assembly runout according to claim 8, characterized in that: When measuring the rotor assembly runout, the axis of the low-pressure turbine shaft (6) is automatically aligned by the center stand.

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