A measuring device

Abstract

A measuring device for implementing a run-out measurement in an engine assembly process, comprising a first measuring rod for mounting a measuring instrument, a stator support seat for connecting a stator part of the engine, a rotor support seat for connecting a rotor part of the engine, and 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 are respectively rotatable relative to the inner ring.

Description

Technical Field

[0001] This invention relates to the field of aircraft engine assembly technology, and more specifically to a measuring device. Background Technology

[0002] Aero-engines have complex structures, numerous and varied parts, and require high precision in manufacturing, making assembly extremely difficult. To ensure the quality of aero-engine assembly, a large amount of data needs to be measured during the assembly process. Sometimes, measuring a single data point often requires purchasing many specialized tooling fixtures, equipment, and repeated assembly and disassembly. Currently, the assembly of the low-pressure turbine-stator unit of an aero-engine is mostly achieved using a precision turntable in conjunction with specialized tooling. This assembly measurement method is relatively complex, typically only achieving stator rotation or fixture rotation, resulting in long cycles, low accuracy, and high cost of measuring equipment. Summary of the Invention

[0003] The purpose of this invention is to provide a measuring device that can ensure reliable connection and concentricity of the engine rotor and stator assembly, thereby reducing assembly difficulty.

[0004] The aforementioned measuring device is used to perform runout measurement during engine assembly, including:

[0005] The first measuring rod is used to mount the measuring instrument;

[0006] Stator support, used to connect the stator components of the engine;

[0007] Rotor support for connecting the rotor components of the engine; and

[0008] The rotating mechanism includes an inner ring, a middle ring, and an outer ring;

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

[0010] In one or more embodiments, the stator support is clearance-fitted with the stator components of the engine.

[0011] In one or more embodiments, the rotor support is clearance-fitted with the rotor component of the engine.

[0012] In one or more embodiments, the stator support is further provided with a limiting element to restrict the axial movement of the rotating mechanism relative to the stator support.

[0013] In one or more embodiments, the rotating mechanism further comprises roller components and a retainer, the roller components being connected by the retainer, and being 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 components are conical rollers.

[0015] In one or more embodiments, the measuring device further comprises a moving device, and the measuring device is arranged on the moving device.

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

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

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

[0019] The above measuring device can avoid the dependence on a precision rotary table in the conventional engine rotating stator assembly measurement method, and a precise rotating mechanism is used to ensure the precision of the engine rotor component and stator component runout measurement. In the measurement process, the rotating stator component can be rotated alone, the runout measurement is convenient and fast, and the hole probe inspection requirement of the rotor assembly can be met. BRIEF DESCRIPTION OF DRAWINGS

[0020] The above and other features, aspects and advantages of the present application will become more apparent by reference to the following description taken in conjunction with the accompanying drawings, in which:

[0021] Figure 1 is a structural schematic diagram of an existing engine rotating stator assembly measurement device.

[0022] Figure 2 is a rotating stator assembly measurement technical scheme schematic diagram according to an embodiment of the present application. DETAILED DESCRIPTION

[0023] The application will be further described below in connection with specific embodiments and drawings, and more details are set forth in the following description in order to fully understand the application, but the application can be implemented in many other ways different from the description, and those skilled in the art can make similar generalizations and deductions according to actual application without departing from the concept of the application, and therefore the protection scope of the application should not be limited by the content of the specific embodiments. It should be noted that these and subsequent other drawings are only examples, and are not drawn according to the condition of the same scale, and should not be used as a limitation on the actual protection scope required by the application.

[0024] As shown in Figure 1 , the traditional engine assembly measurement method usually uses a precision turntable 9 to cooperate with a rotor assembly seat 71 to realize assembly and measurement, the precision turntable 9 includes a runout measuring rod 93, which is arranged on a turntable base 91 through a turntable support rod 92, the rotor assembly seat 71 is fixed on the precision turntable 8, used for positioning and supporting the low vortex rotor and the stator 7, the runout measurement is realized by rotating the precision turntable 8, and the assembly process depends on the turntable resource. In the long assembly process, the runout measurement reference needs to be frequently adjusted, the process is relatively complex, the assembly period is relatively long, after the low vortex rotor support cone wall is installed, the assembly reference cannot be directly measured, the reference needs to be converted, and the measurement accuracy is affected.

[0025] To solve the foregoing problems, the application provides a measurement device, which can be used for implementing runout measurement in the engine assembly process, can ensure that the assembly connection between the engine rotor and the stator is reliable, the concentricity and the coaxiality are real and reliable, and the assembly difficulty is reduced, so as to solve the problems of complex measurement, long period and low accuracy of the traditional aero-engine rotor and stator assembly method to a certain extent.

[0026] As shown in Figure 2 , the measurement 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 for installing a measuring instrument (not shown in the figure), the stator support seat 3 is used for connecting a stator component (not shown in the figure) of the engine, the rotor support seat 2 is used for connecting a rotor component (not shown in the figure) of the engine, 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 be respectively rotated relative to the inner ring 41.

[0027] The measuring device can avoid the dependence on the precision rotary table in the traditional engine rotor-stator assembly measurement method, and the precision rotating mechanism 4 is used to ensure the accuracy of the runout measurement of the engine rotor component and the stator component. In the measurement process, the rotor-stator component can be rotated alone, the runout measurement is convenient and fast, and the hole probe inspection requirement of the rotor assembly can be met.

[0028] Specifically, the measuring device fixes and installs the stator support seat 3 on the outer ring 42 of the rotating mechanism 4, the stator support seat 3 has a stator component connecting end 30, and the engine stator component can be fixedly connected to the stator component connecting end 30, so as to realize the independent rotation of the stator component. The measuring instrument on the first measuring rod 1 is used to realize the runout measurement function in the assembly process of the engine stator component. The rotor support seat 2 is fixedly installed on the middle ring 43 of the rotating mechanism 4, the rotor support seat 2 has a rotor component connecting end 20, and the engine rotor component can be fixedly connected to the rotor component connecting end 20, so as to realize the independent rotation of the rotor component. The measuring instrument is used to realize the runout measurement function in the assembly process of the engine rotor component, so that the rotor-stator component can be rotated alone in the runout measurement process. The rotation of the rotor component can better simulate the rotation state of the component in the actual working process of the engine, so that the runout measurement result is more accurate.

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

[0030] In the 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 gap fit, and synchronous rotation of the two can be realized by, for example, a stop fit, so that the stator component and the rotor component can rotate relative to the inner ring 41 of the rotating mechanism 4, respectively. In the runout measurement process, the inner ring 41 is fixed, for example, the inner ring 41 is fixedly installed in a plane to ensure that it cannot move, and the plane can be regarded as a reference plane for runout measurement. The first measuring rod 1 is also fixedly installed in the plane and located at the center of the inner ring 41, so that the runout measurement of the stator component or the rotor component can be implemented.

[0031] The first limiting piece 31 is also arranged on the stator support seat 3, which can be a limiting nut and is threadedly connected to the stator support seat 3 to limit the movement of the outer ring 42 of the rotating mechanism 4 relative to the stator support seat 3 in the axial direction, so as to avoid the movement of the component during the runout measurement and improve the measurement accuracy.

[0032] The rotating mechanism 4 further comprises roller components 44 and a retainer, so that the rotating mechanism 4 has a structure similar to a bearing, a plurality of roller components 44 are connected through the retainer, and the roller components 44 are arranged between the inner ring 41 and the middle ring 43 and between the middle ring 43 and the outer ring 42 after assembly with the retainer, so as to realize the relative rotation between the stages. The roller components 44 can be conical rollers, which can not only realize relative rotation but also bear axial load, 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] As shown in Figure 2 In the embodiment, the measuring device further comprises a mobile device 5, which can be a trolley. The measuring device is arranged on the mobile device 5, so as to realize flexible conversion of the assembly station and in-plant transportation function, and provide a basis for pulsating assembly.

[0034] The mobile device 5 has a mounting seat 51, which is in interference fit with the inner ring 41. Through the interference fit between the inner ring 41 and the mounting, the accuracy of the run-out measurement reference can be realized, the connection is stable and reliable, frequent adjustment of the measurement reference during the measurement process is avoided, the assembly cycle can be shortened, and the assembly efficiency is improved. The mounting seat 51 and the inner ring 41 can further adopt a stop opening fit mode to ensure synchronous rotation therebetween.

[0035] The mounting seat 51 is further provided with a second limiting piece 511, which can be a limiting nut and is threadedly connected to the mounting seat 51, so as to limit the axial movement of the inner ring 41 of the rotating mechanism 4 relative to the mounting seat 51, avoid the movement of the components during the run-out measurement, and improve the measurement accuracy.

[0036] In other embodiments, the first limiting piece 31 and the second limiting piece 511 can also adopt different structures from the foregoing embodiments, for example, limiting bosses and limiting grooves arranged on the stator support seat 3 / mounting seat 51 and the rotating mechanism outer ring 42 / inner ring 41, respectively, so as to realize the axial limiting of the rotating mechanism 4 relative to the stator support seat 3 / mounting seat 51 through the cooperation of the limiting bosses and the limiting grooves.

[0037] In the embodiment, the mobile device 5 is further provided with a second measuring rod 6 for mounting a measuring instrument. As shown in Figure 2 The second measuring rod 6 is arranged on the outer side relative to the first measuring rod 1, and can be respectively used for measuring the components on the inner and outer circumferential sides of the rotating stator assembly unit, thereby improving the use range of the measuring device.

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

[0039] 1) Install the engine stator case to the stator support seat 3, fixed by nut, install the first outer ring assembly, and measure the runout of the outer ring honeycomb;

[0040] 2) Install the low-pressure first turbine disk assembly to the rotor support seat 2, fixed by the pressing plate;

[0041] 3) Install the second guide vane assembly and the outer ring assembly to the stator case, and measure the runout of the guide vane and the outer ring honeycomb;

[0042] 4) Install the low-pressure second turbine disk assembly to the low-pressure first turbine disk assembly, and measure the runout of the disk core;

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

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

Claims

1. A measuring device for performing a run-out measurement during an engine assembly process, characterized in that The utility model relates to a kind of measurement device, comprising: First measuring rod, for installing measuring instrument; Stator support seat, for connecting the stator component of the engine; Rotor support seat, for connecting the rotor component of the engine; And Rotary mechanism, comprising inner ring, middle ring and outer ring; Wherein, the first measuring rod is located at the center of the rotary mechanism, the rotor support seat is arranged on the middle ring, the stator support seat is arranged on the outer ring, so that the rotor support seat and the stator support seat can be rotated relative to the inner ring respectively.

2. The measuring device of claim 1, wherein, The stator support seat is connected with the stator component of the engine with clearance fit.

3. The measuring device of claim 1, wherein, The rotor support seat is connected with the rotor component of the engine with clearance fit.

4. The measuring device of claim 1, wherein, The stator support seat is further provided with a limiting piece to limit the axial movement of the rotary mechanism relative to the stator support seat.

5. The measuring device of claim 1, wherein, The rotary mechanism further comprises roller components and a cage, the roller components are connected by the cage and arranged between the inner ring and the middle ring, the middle ring and the outer ring.

6. The measuring device of claim 5, wherein, The roller components are conical rollers.

7. The measuring device of claim 1, wherein, The measurement device further comprises a mobile device, and the measurement device is arranged on the mobile device.

8. The measuring device of claim 7, wherein, The mobile device has a mounting seat, and the mounting seat is in interference fit with the inner ring.

9. The measuring device of claim 8, wherein, The mounting seat is further provided with a limiting piece to limit the axial movement of the rotary mechanism relative to the mounting seat.

10. The measuring device of claim 7, wherein, The mobile device is further provided with a second measuring rod for installing measuring instrument.

Images