Measuring device

Abstract

A measuring device is used for implementing run-out measurement in the engine assembling process and comprises a first measuring rod, a stator supporting seat, a rotor supporting seat and a rotating mechanism, the first measuring rod is used for installing a measuring instrument, the stator supporting seat is used for being connected with a stator component of an engine, and the rotor supporting seat is used for being connected with a rotor component of the engine. The rotating mechanism comprises an inner ring, a middle ring and an outer ring, the first measuring rod is located at the center of the rotating mechanism, the rotor supporting seat is arranged on the middle ring, and the stator supporting seat is arranged on the outer ring, so that the rotor supporting seat and the stator supporting seat can respectively rotate relative to the inner ring.

Description

Technical Field

[0001] The invention relates to the technical field of aero-engine assembly, and in particular to a measuring device. Background Art

[0002] Aircraft engines have complex structures, a large number of parts and a wide variety of parts. The parts processing and manufacturing are of high precision, and the assembly is extremely difficult. In order to ensure the assembly quality of aircraft engines, a large amount of data needs to be measured during the assembly process. Sometimes, in order to measure a certain data, it is often necessary to purchase a lot of special tooling, tools, equipment, and repeatedly assemble and disassemble many times to achieve it. At present, the assembly of the rotor and stator unit of the low-pressure turbine of aircraft engines is mostly achieved by a precision turntable combined with special tooling. This assembly measurement method is relatively complicated, and usually can only achieve stator rotation or measuring tool rotation, with a long cycle, low precision, and high measuring tool cost. Summary of the invention

[0003] The purpose of the present invention is to provide a measuring device, which can ensure that the engine rotor and stator are assembled and connected in place reliably, and the concentricity and coaxiality are true and reliable, thereby reducing the difficulty of assembly.

[0004] The measuring device is used to measure the runout during the engine assembly process, and comprises:

[0005] A first measuring rod, used for mounting a measuring instrument;

[0006] A stator support seat, used for connecting the stator component of the engine;

[0007] A rotor support for connecting a rotor component of the engine; and

[0008] A rotating mechanism, comprising an inner ring, a middle ring and an outer ring;

[0009] Wherein, the first measuring rod is located at the center of the rotating mechanism, the rotor support seat is arranged on the middle ring, and the stator support seat is arranged on the outer ring, so that the rotor support seat and the stator support seat can rotate respectively relative to the inner ring.

[0010] In one or more embodiments, the stator support seat is connected with the stator component of the engine by clearance fit.

[0011] In one or more embodiments, the rotor support is connected to a rotor component of the engine with a clearance fit.

[0012] In one or more embodiments, a limit member is further provided on the stator support seat to limit the axial movement of the rotating mechanism relative to the stator support seat.

[0013] In one or more embodiments, the rotating mechanism further includes a roller component and a retaining frame, and the roller component is connected through the retaining frame and is arranged between the inner ring and the middle ring, and between the middle ring and the outer ring.

[0014] In one or more embodiments, the roller component is a tapered roller.

[0015] In one or more embodiments, the measuring device further includes a mobile device, and the measuring device is disposed on the mobile device.

[0016] In one or more embodiments, the moving device has a mounting seat, and the mounting seat is interference-fitted with the inner ring.

[0017] In one or more embodiments, a limit member is further provided on the mounting seat to limit the axial movement of the rotating mechanism relative to the mounting seat.

[0018] In one or more embodiments, the mobile device is further provided with a second measuring rod for mounting a measuring instrument.

[0019] The above-mentioned measuring device can avoid the reliance on a precision turntable in the traditional engine rotor-stator assembly measurement method, and adopts a precise rotating mechanism to ensure the accuracy of the runout measurement of the engine rotor components and stator components. During the measurement process, the rotor and stator components can rotate independently, the runout measurement is convenient and fast, and can meet the needs of borescope inspection of the rotor assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above and other features, properties and advantages of the present invention will become more apparent through the following description in conjunction with the accompanying drawings and embodiments, in which:

[0021] Figure 1 The invention is a structural schematic diagram of an existing engine rotor and stator assembly measuring device.

[0022] Figure 2 It is a schematic diagram of a rotor-stator assembly measurement technology solution according to an embodiment of the present application. DETAILED DESCRIPTION

[0023] The present invention is further described below in conjunction with specific embodiments and drawings. More details are described in the following description to facilitate a full understanding of the present invention, but the present invention can obviously be implemented in a variety of other ways different from the description. Those skilled in the art can make similar generalizations and deductions based on actual application situations without violating the connotation of the present invention. Therefore, the protection scope of the present invention should not be limited by the content of this specific embodiment. It should be noted that these and other subsequent drawings are only examples, which are not drawn according to the conditions of equal proportions, and should not be used as a limitation on the protection scope of the actual requirements of the present invention.

[0024] like Figure 1 As shown, the traditional engine assembly measurement method usually adopts a precision turntable 9 in conjunction with a rotor-stator assembly seat 71 to achieve assembly and measurement. The precision turntable 9 includes a runout measuring rod 93, which is arranged on the turntable base 91 through a turntable support rod 92. The rotor-stator assembly seat 71 is fixed on the precision turntable 8, which is used to position and support the low-vortex rotor and stator 7. The runout measurement is achieved by rotating the precision turntable 8. The assembly process depends on turntable resources. During the long assembly process, the runout measurement benchmark needs to be frequently adjusted. The process is relatively complicated and the assembly cycle is long. After the low-vortex rotor support cone wall is installed, the assembly benchmark cannot be directly measured and the benchmark needs to be converted, which affects the measurement accuracy.

[0025] In order to solve the aforementioned problems, the present application provides a measuring device, which can be used to implement vibration measurement during the engine assembly process, thereby ensuring that the assembly connection between the engine rotor and stator is reliable, the concentricity and coaxiality are true and reliable, and the assembly difficulty is reduced, so as to achieve the purpose of solving the problems of complex measurement, long cycle, low precision, etc. existing in the traditional aircraft engine rotor and stator assembly method to a certain extent.

[0026] like Figure 2 As shown, the measuring device includes a first measuring rod 1, a stator support seat 3, a rotor support seat 2 and a rotating mechanism 4, the first measuring rod 1 is used to install a measuring instrument (not shown in the figure), the stator support seat 3 is used to connect the stator component of the engine (not shown in the figure), the rotor support seat 2 is used to connect the rotor component of the engine (not shown in the figure), and the rotating mechanism 4 includes an inner ring 41, a middle ring 43 and an outer ring 42, wherein the first measuring rod 1 is located at the center of the rotating mechanism 4, the rotor support seat 2 is arranged on the middle ring 43, and the stator support seat 3 is arranged on the outer ring 42, so that the rotor support seat 2 and the stator support seat 3 can rotate respectively relative to the inner ring 41.

[0027] The above-mentioned measuring device can avoid the reliance on a precision turntable in the traditional engine rotor-stator assembly measurement method, and adopts a precise rotating mechanism 4 to ensure the accuracy of the runout measurement of the engine rotor components and stator components. During the measurement process, the rotor and stator components can be rotated independently, the runout measurement is convenient and fast, and can meet the needs of borescope inspection of the rotor assembly.

[0028] Specifically, the measuring device is implemented by fixing the stator support seat 3 on the outer ring 42 of the rotating mechanism 4, the stator support seat 3 having a stator component connection end 30, and the engine stator component can be fixedly connected to the stator component connection end 30, thereby realizing the independent rotation of the stator component, and cooperating with the measuring instrument on the first measuring rod 1 to realize the vibration measurement function during the assembly process of the engine stator component; fixing the rotor support seat 2 on the middle ring 43 of the rotating mechanism 4, the rotor support seat 2 having a rotor component connection end 20, and the engine rotor component can be fixedly connected to the rotor component connection end 20, thereby realizing the independent rotation of the rotor component, and cooperating with the measuring instrument to realize the vibration measurement function during the assembly process of the engine rotor component, so that the rotor and stator components can rotate independently during the vibration measurement process, wherein the rotation of the rotor components can better simulate the rotation state of the components during the actual operation of the engine, so that the vibration measurement result is more accurate.

[0029] Figure 2 A specific implementation of the measuring device provided in the present application is shown, and the measuring device is further described by taking this implementation as an example.

[0030] In this embodiment, the stator support seat 3 and the stator component of the engine, and the rotor support seat 2 and the rotor component of the engine are connected by a small clearance fit, and the synchronous rotation of the two can be achieved by, for example, stopper fit, so that the stator component and the rotor component can rotate relative to the inner ring 41 of the rotating mechanism 4. During the runout measurement process, the inner ring 41 is fixed, for example, the inner ring 41 can be fixedly installed in a plane to ensure that it cannot move. The plane can be regarded as the reference plane for the runout measurement. The first measuring rod 1 is also fixedly installed in the plane and located at the center of the inner ring 41, and the runout measurement of the stator component or the rotor component can be implemented.

[0031] A first limit member 31 is also provided on the stator support seat 3. The first limit member 31 can be a limit nut, which is threadedly connected to the stator support seat 3 to limit the axial movement of the outer ring 42 of the rotating mechanism 4 relative to the stator support seat 3, thereby avoiding movement of components during the vibration measurement process and improving the measurement accuracy.

[0032] The rotating mechanism 4 further includes a roller component 44 and a cage, so that the rotating mechanism 4 has a structure similar to a bearing, and multiple roller components 44 are connected by the cage. After the roller components 44 and the cage are assembled, they are arranged between the inner ring 41 and the middle ring 43, and between the middle ring 43 and the outer ring 42 to achieve relative rotation between each level. The roller component 44 can be a tapered roller, which can withstand axial loads while achieving relative rotation, thereby improving the connection stability between the inner ring 41 and the middle ring 43, and between the middle ring 43 and the outer ring 42.

[0033] like Figure 2 As shown, in this embodiment, the measuring device also includes a mobile device 5, which can be a trolley. The measuring device is arranged on the mobile device 5, which can realize the flexible conversion of assembly stations and the in-factory transportation function, and provide a basis for pulsating assembly.

[0034] The moving device 5 has a mounting seat 51, and the mounting seat 51 is interference-fitted with the inner ring 41. The interference fit between the inner ring 41 and the mounting seat can achieve accurate runout measurement datum, stable and reliable connection, avoid frequent adjustment of the measurement datum during measurement, shorten the assembly cycle, and improve assembly efficiency. The mounting seat 51 and the inner ring 41 can also be further fitted with a stopper to ensure synchronous rotation between the two.

[0035] A second limit member 511 is also provided on the mounting seat 51. The second limit member 511 can be a limit nut, which is threadedly connected to the mounting seat 51 to limit the axial movement of the inner ring 41 of the rotating mechanism 4 relative to the mounting seat 51, thereby avoiding movement of components during the runout measurement and improving the measurement accuracy.

[0036] In other embodiments, the first limiting member 31 and the second limiting member 511 may also adopt a structure different from that in the aforementioned embodiments, such as a limiting boss and a limiting groove respectively arranged on the stator support seat 3 / mounting seat 51 and the outer ring 42 / inner ring 41 of the rotating mechanism, and the axial limitation of the rotating mechanism 4 relative to the stator support seat 3 / mounting seat 51 is achieved through the cooperation of the limiting boss and the limiting groove.

[0037] In this embodiment, the mobile device 5 is also provided with a second measuring rod 6 for mounting a measuring instrument. Figure 2 As shown, the second measuring rod 6 is arranged outside the first measuring rod 1, and can be used to measure the runout of the components on the inner and outer sides of the rotor-stator assembly unit, thereby increasing the use range of the measuring device.

[0038] The engine assembly and testing process using the measuring device in the above embodiment is as follows:

[0039] 1) Install the stator casing of the engine onto the stator support seat 3, fix it with nuts, install the first-level outer ring assembly, and measure the runout of the outer ring honeycomb;

[0040] 2) Install the low-pressure first-stage turbine disk assembly onto the rotor support seat 2 and fix it with a pressure plate;

[0041] 3) Install the secondary guide vane assembly and outer ring assembly on the stator casing, and measure the runout of the guide vane and outer ring honeycomb;

[0042] 4) Install the low-pressure second-stage turbine disk assembly onto the low-pressure first-stage turbine disk assembly and measure the runout of the disk center;

[0043] 5) Repeat steps 3-4 to gradually complete the installation of other guide vane assemblies, outer ring assemblies and turbine disk assemblies, as well as the runout measurement.

[0044] Although the present invention is disclosed as above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art may make possible changes and modifications without departing from the spirit and scope of the present invention. Therefore, any modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention shall fall within the protection scope defined by the claims of the present invention.

Claims

1. A measuring device for measuring runout during engine assembly, characterized in that: include: A first measuring rod, used for mounting a measuring instrument; A stator support seat, used for connecting the stator component of the engine; A rotor support seat, used for connecting the rotor component of the engine; as well as A rotating mechanism, comprising an inner ring, a middle ring and an outer ring; Wherein, the first measuring rod is located at the center of the rotating mechanism, the rotor support seat is arranged on the middle ring, and the stator support seat is arranged on the outer ring, so that the rotor support seat and the stator support seat can rotate respectively relative to the inner ring.

2. The measuring device according to claim 1, characterized in that The stator support seat is connected with the stator component of the engine through clearance fit.

3. The measuring device according to claim 1, characterized in that The rotor support seat is connected with the rotor component of the engine through clearance fit.

4. The measuring device according to claim 1, characterized in that The stator support seat is also provided with a limiting member to limit the axial movement of the rotating mechanism relative to the stator support seat.

5. The measuring device according to claim 1, characterized in that The rotating mechanism further includes a roller component and a retaining frame. The roller component is connected through the retaining frame and is arranged between the inner ring and the middle ring, and between the middle ring and the outer ring.

6. The measuring device according to claim 5, characterized in that The roller component is a tapered roller.

7. The measuring device according to claim 1, characterized in that The measuring device further comprises a moving device, and the measuring device is arranged on the moving device.

8. The measuring device according to claim 7, characterized in that The moving device has a mounting seat, and the mounting seat is interference-fitted with the inner ring.

9. The measuring device according to claim 8, characterized in that The mounting seat is also provided with a limiting member to limit the axial movement of the rotating mechanism relative to the mounting seat.

10. The measuring device according to claim 7, characterized in that The mobile device is also provided with a second measuring rod for mounting a measuring instrument.

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