Rotor disc heartbeat measuring tool and method

Abstract

The invention provides a rotor disc heartbeat measuring tool which is used for measuring a disc heartbeat value in a rotor, the rotor comprises a first shaft neck and a second shaft neck which are located at the two axial ends, the tool comprises a supporting base, a measuring rod and a sensor, and the supporting base comprises a pair of measuring rod supporting pieces and a pair of rotor supporting frames; the pair of rotor support frames are respectively used for supporting the first shaft neck and the second shaft neck; the measuring rod is used for extending into a rotor disc cavity and is supported by a pair of measuring rod supporting pieces; the sensor is movably arranged on the measuring rod, and the height of the measuring rod supporting piece and the height of the rotor supporting frame are adjustable. The tool can accurately measure the disc heartbeat value in a complete rotor state.

Description

Technical Field

[0001] The invention relates to the field of testing, and in particular to the field of rotor runout testing. Background Art

[0002] The rotor of an aircraft engine is composed of a multi-stage disc assembly, and adjacent disc assemblies are connected by bolts, such as Figure 1 As shown, the axially distributed first-stage disk, second-stage disk and other multi-stage disks are connected by bolts to form an engine rotor assembly. Whether the disks at each stage are coaxial is an important indicator for evaluating the connection quality of the engine rotor.

[0003] When assembling the rotor, the coaxiality of each disc must be ensured to reduce the uneven mass distribution caused by the rotor's non-concentricity, avoid engine vibration and radial friction between the rotor and stator. When assembling the rotor, the runout value of the rotor disc center or the connection stop at each level can be monitored on the turntable to evaluate the installation quality of the rotor.

[0004] In the case of a complete rotor, because the engine rotor is similar to a pocket structure, the inner diameter of the center hole of each disc is larger than the diameter of the two end journals, and it is difficult for the measuring head on the turntable to pass through the journal hole to reach the center of the rotor disc. Therefore, in the state of a complete rotor, it is very difficult to use the turntable to evaluate whether the concentricity of each rotor is qualified. In addition, after the engine has been working for a long time, the connecting bolts between the rotors may fail, causing the concentricity of each rotor to exceed the design value. Under the existing technical conditions, it is impossible to evaluate the connection status of each disc in the state of a complete rotor. Therefore, it is impossible to know whether the connection between the rotor discs has failed, and it is difficult to make the correct decision to continue to work or disassemble and reinstall the engine rotor. Summary of the invention

[0005] An object of the present invention is to provide a rotor disk centerline runout measurement tool capable of accurately measuring the disk centerline runout value in a complete rotor state.

[0006] To achieve the above-mentioned purpose, a rotor disk center beat measuring tool is used to measure the disk center beat value in a rotor, wherein the rotor comprises a first shaft neck and a second shaft neck located at both ends of the axial direction, and the tool comprises a supporting base, a measuring rod and a sensor, wherein the supporting base comprises a pair of measuring rod supports and a pair of rotor support frames, wherein the pair of rotor support frames are respectively used to support the first shaft neck and the second shaft neck; the measuring rod is used to extend into the rotor disk cavity and is supported by the pair of measuring rod supports; the sensor is movably and rotatably arranged on the measuring rod, wherein the measuring rod support and the rotor support frame are arranged to be height-adjustable.

[0007] In one or more embodiments, the support base includes a support column and a guide groove located on the support column, and the measuring rod support and the rotor support frame are arranged on both sides of the support column and include a guide protrusion that cooperates with the guide groove.

[0008] In one or more embodiments, the guiding protrusion is a wheel or a bump.

[0009] In one or more embodiments, the rotor support frame comprises a roller, and the roller is used for rolling cooperation with the first journal or the second journal.

[0010] In one or more embodiments, the rotor support frame further includes a fixing plate for supporting the roller, and the guiding protrusion is provided on the fixing plate.

[0011] In one or more embodiments, the first journal and the second journal include protrusions, the roller includes a circumferential groove, and the protrusions are embedded in the circumferential groove.

[0012] In one or more embodiments, the support base includes a pair of extension members, and the pair of extension members are respectively used to connect with the measuring rod support frame and the rotor support member to drive the measuring rod support frame and the rotor support member to move up and down.

[0013] In one or more embodiments, the elongated member is a threaded member or a pneumatic component.

[0014] In one or more embodiments, the threaded member is axially limited on the support base by a retaining ring.

[0015] In one or more embodiments, the measuring rod includes a screw, a rod body and a measuring seat, the screw and the rod body pass through the measuring seat, and the screw is threadedly connected to the measuring seat, the rod body is rotatably matched with the measuring seat, and the sensor is fixed on the measuring seat; the screw is used to drive the measuring seat to move axially and rotate.

[0016] In one or more embodiments, both ends of the rod body are provided with snap rings, and the top of the measuring rod support frame is provided with a snap groove that cooperates with the snap rings.

[0017] In one or more embodiments, the measuring rod support comprises an avoidance groove for avoiding the screw rod.

[0018] In one or more embodiments, the support base is provided with universal wheels.

[0019] In one or more embodiments, the measuring rod also includes a micro camera.

[0020] Another object of the present invention is to provide a rotor disk core beat measurement method, which uses the above-mentioned rotor disk core beat measurement tool for measurement, and the method includes the following steps: placing the first shaft neck and the second shaft neck of the rotor on a pair of rotor support frames respectively; extending a measuring rod with a sensor into the rotor disk cavity, and placing both ends on a pair of measuring rod supports respectively; rotating the measuring rod so that the sensor probe on the measuring rod abuts against the rotor disk core cylindrical surface; adjusting the height of the measuring rod support and / or the rotor support frame so that the sensor probe on the measuring rod can contact the rotor disk core cylindrical surface with different inner diameters.

[0021] The above-mentioned rotor disk heart beat measurement tool uses a rotor support frame to support the first shaft neck and the second shaft neck of the complete rotor respectively, and obtains the heart beat value of the rotor disk of this stage by using a sensor through the rotation of the rotor. Through the accurate measurement of the beat value, it is judged whether the connection of the rotor of this stage is reliable and whether the coaxiality between the various stages of the disk meets the design requirements, thereby providing a decision-making basis for the engine rotor to continue to work or disassemble. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] 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:

[0023] Figure 1 It is a schematic diagram of the engine rotor structure;

[0024] Figure 2 It is a schematic diagram of the rotor disk heartbeat measurement;

[0025] Figure 3 is a schematic diagram of one embodiment of a rotor disk heartbeat measurement tool;

[0026] Figure 4 is a cross-sectional view of an embodiment of a rotor disk heartbeat measurement tool;

[0027] Figure 5 The figure is a disassembled parts diagram of one embodiment of a rotor disk heartbeat measurement tool.

[0028] Symbols and Markings

[0029] 1 Support base

[0030] 2 Measuring rod

[0031] 5 Extension

[0032] 6 retaining ring

[0033] 8 Sensors

[0034] 10 Base

[0035] 11 Support column

[0036] 13 Rotor support frame

[0037] 14 Measuring rod support

[0038] 21 Screw

[0039] 22 Rod body

[0040] 23 Measuring seat

[0041] 25 Snap ring

[0042] 71 Guide convex body

[0043] 72 Guide slot

[0044] 100 Turntable

[0045] 101 First Level Disk

[0046] 102 Second Level Disk

[0047] 110 First journal

[0048] 120 Second journal

[0049] 130 Bolt

[0050] 131 Roller

[0051] 132 Fixed plate

[0052] 140 disc cavity

[0053] 145 Card slot 146 Avoidance slot DETAILED DESCRIPTION

[0054] The present invention is further described below in conjunction with specific embodiments and drawings. More details are elaborated in the following description to facilitate a full understanding of the present invention. However, the present invention can obviously be implemented in a variety of other ways different from the description herein. 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.

[0055] It should be noted that these and other subsequent drawings are only examples and are not drawn to scale, and should not be used to limit the actual scope of protection required by the present invention.

[0056] Figure 1The structure diagram of the engine rotor component is shown, including a first-stage disk 101, a second-stage disk 102 and other multi-stage turntables 100. The turntables 100 of each stage are connected to each other by bolts 130. A disk cavity 140 is formed on the radial inner side of the turntable 100. The rotor center measurement is to measure the runout value of the rotor center through a sensor located in the disk cavity 140.

[0057] The rotor further includes a front journal and a rear journal located at two axial ends, which are denoted by a first journal 110 and a second journal 120 in the embodiment shown in the drawings.

[0058] Reference Figures 2 to 5 As shown, the rotor disk centerline runout measuring tool disclosed in the present invention is used to measure the disk centerline runout value in a complete rotor state. The tool comprises a support base 1 , a measuring rod 2 and a sensor 8 .

[0059] The support base 1 includes a pair of measuring rod supports 14 and a pair of rotor supports 13 , wherein the pair of rotor supports 13 are respectively used to support the first journal 110 and the second journal 120 . The measuring rod 2 is used to extend into the rotor disc cavity 140 and is supported by the pair of measuring rod supports 14 .

[0060] The sensor 8 is movably arranged on the measuring rod 2 to obtain the runout value of the rotor disc center in real time, and to evaluate whether the connection status of each level of rotor meets the engine working requirements based on the axis runout value established by the disc center of each level relative to the front and rear journals.

[0061] In some embodiments, Figure 3 and Figure 5 As shown, the support base 1 includes a base 10, a support column 11 fixed on the base 10, and a guide groove 72 located on the support column 11. The measuring rod support 14 and the rotor support frame 13 are respectively arranged on both sides of the support column 11, and each includes a guide protrusion 71 matched with the guide groove 72.

[0062] The guide protrusion 71 is a wheel or a bump

[0063] The guide protrusion 71 forms a limit guide, so that the rotor support frame 13 and the measuring rod support frame 14 can only move up and down relative to the support base 1. In this way, the measuring rod support 14 and the rotor support frame 13 are fixed on both sides of the support base 1, and support the end of the journal and the measuring rod 2 respectively.

[0064] In some preferred embodiments, the rotor support frame 13 includes a roller 131 and a fixing plate 132 for carrying the roller 131 , and the roller 131 is used for rolling cooperation with the first journal 110 or the second journal 120 .

[0065] The fixing plate 132 is provided with a guide protrusion 71. Figure 2As shown, the roller 131 on the rotor support frame 13 on one side supports the first journal 110 , and the roller 131 ′ on the rotor support frame 13 ′ on the other side supports the second journal 120 , so as to jointly support the rotation of the rotor.

[0066] In some embodiments, in order to avoid separation of the roller and the journal, a protrusion is provided on the journal, and the roller 131 includes a circumferential groove (not shown in the figure), and the protrusion is embedded in the circumferential groove to achieve rolling cooperation between the roller and the journal.

[0067] Therefore, when the rotor is in a complete state, the front and rear bearing mounting cylinders of the rotor are used as positioning references, and the front and rear journals of the rotor are supported by a support frame with rollers. The two rollers are in contact with the bearing mounting cylinders on the front and rear journals of the rotor respectively, and the rotor can rotate along its own axis on the support frame with rollers.

[0068] In some embodiments, the measuring rod 2 includes a screw 21 and a measuring seat 23. The measuring rod 2 as a whole passes through the inner cavity 140 of the engine rotor, and is supported on both sides by the measuring rod support 14. The screw 21 passes through the measuring seat 23 and is threadedly connected to the measuring seat 23, and the sensor 8 is fixed on the measuring seat 23. The measuring rod 2 also includes a rod body 22 that passes through the measuring seat, which is supported by the measuring rod support 14 on both sides, rotatably cooperates with the measuring seat 23, and rolls with the roller 131, and the rotor rotates along its own axis on the supporting roller.

[0069] In this way, the screw rod 21 can drive the measuring seat 23 to move axially and rotate.

[0070] The screw 21 is limited by the retaining ring 24 on the axial side, and the screw 21 is threadedly connected to the measuring seat 23. During the rotation of the screw 21, the measuring seat 23 can be driven to move linearly along the rod body 22. A clamping ring 25 is provided on the measuring rod body 22, which can be clamped in the clamping groove 145 at the top of the measuring rod support frame 14 to form an axial sub-positioning.

[0071] The measuring rod support 14 also includes an escape groove 146 for escaping the screw rod 21. The screw rod 21 can freely rotate through the escape groove 146. Figure 3 and Figure 5 shown.

[0072] Preferably, the support base 10 includes a pair of extension members 5, and the pair of extension members 5 are respectively used to connect with the measuring rod support frame 14 and the rotor support member 13 to drive the measuring rod support frame 14 and the rotor support member 13 to move up and down.

[0073] Specifically, the extension member includes but is not limited to a threaded member or a pneumatic component. Figure 5The threaded part shown is fixed in the mounting hole on the cross bar 12 of the support frame base 1 by the retaining ring 6, and the rotor support frame 13 and the measuring rod support frame 14 are driven up and down by the thread to meet the contact between the sensor probe and the rotor disk core cylindrical surface with different inner diameters.

[0074] The above structure makes the height of the measuring rod support frame 14 and the rotor support 13 adjustable. The height of the measuring rod support frame 14 is adjustable, which can realize the sensor probe to contact the cylindrical surface of the rotor disk center with different inner diameters. The sensor mounting seat moves axially under the control of the screw rod, which can meet the measurement of the disk center beats of various levels.

[0075] When the elongated member rotates, it can drive the rotor support frame 13 to move up and down, thereby achieving horizontal support of the rotor.

[0076] In some embodiments, in order to realize the transfer of the measuring tool, the support base 1 is also provided with universal wheels (not shown in the figure). In order to ensure the accurate position of the sensor probe, the measuring rod also includes a micro camera.

[0077] During the rotation of the rotor, the sensor is used to measure the disc center beat to evaluate the connection status of the rotor. If the bolts are loose and the rotor connection fails, the measured rotor disc center beat value will inevitably be abnormal.

[0078] The present application also discloses a method for measuring the rotor disk center beat: the first shaft neck and the second shaft neck of the rotor are respectively placed on a pair of rotor support frames; a measuring rod with a sensor is extended into the disk cavity of the rotor, and both ends are respectively placed on a pair of measuring rod support members; the measuring rod is rotated so that the sensor probe on the measuring rod is against the rotor disk center cylindrical surface; the height of the measuring rod support member and / or the rotor support frame is adjusted so that the sensor probe on the measuring rod can contact the rotor disk center cylindrical surfaces with different inner diameters.

[0079] Therefore, the above-mentioned measuring tool uses the front and rear bearing mounting cylindrical surfaces of the rotor as the positioning reference, supports the front and rear journals of the rotor through a support frame with rollers, and the measuring rod for fixing the sensor passes through the inner hole of the engine rotor. By adjusting the installation height of the measuring rod on the support frame, the sensor probe can be brought into contact with the disc center cylindrical surfaces of rotor discs with different inner diameters. The rotor can rotate on the supporting rollers, and during the rotation, the sensor probe can be brought into contact with the disc center cylindrical surfaces of rotor discs with different inner diameters. Even if the inner diameter of the disc center hole of each stage of the rotor disc is larger than the aperture of the two end journals and the diameters are different and located on different axial sections, the probe can be brought into contact with the disc center cylindrical surfaces of each stage of the disc by adjusting the threaded drive rotor support frame and the measuring rod support frame, thereby evaluating whether the connection of each stage of the disc is reliable in the complete rotor state.

[0080] The measuring tool also has the advantages of simple structure and easy manufacture and use.

[0081] It should be noted that the use of terms such as "first" and "second" in the above introduction to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and do not represent priority, and therefore cannot be understood as limiting the scope of protection of this application.

[0082] At the same time, the present application uses specific words to describe the embodiments of the present application. For example, "one embodiment", "an embodiment", and / or "some embodiments" refer to a certain feature, structure or characteristic related to at least one embodiment of the present application. Therefore, it should be emphasized and noted that "one embodiment" or "an embodiment" or "an alternative embodiment" mentioned twice or more in different positions in this specification does not necessarily refer to the same embodiment. In addition, some features, structures or characteristics in one or more embodiments of the present application can be appropriately combined.

[0083] 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 rotor disc centerline beat measurement tool, used to measure the disc centerline beat value in a rotor, wherein the rotor comprises a first journal and a second journal located at both ends of the axial direction, characterized in that: The tool includes: A support base, comprising a pair of measuring rod support members and a pair of rotor support frames, wherein the pair of rotor support frames are used to support the first shaft journal and the second shaft journal respectively; A measuring rod, used to extend into the rotor disc cavity and supported by the pair of measuring rod support members; A sensor is movably and rotatably arranged on the measuring rod; Wherein, the measuring rod support and the rotor support frame are arranged to be height-adjustable.

2. The rotor disk heartbeat measurement tool according to claim 1, characterized in that: The support base comprises a support column and a guide groove on the support column. The measuring rod support and the rotor support frame are arranged on both sides of the support column and comprise guide protrusions matched with the guide groove.

3. The rotor disk heartbeat measurement tool according to claim 2, characterized in that: The guiding protrusion is a wheel or a bump.

4. The rotor disk heartbeat measurement tool according to claim 2, characterized in that: The rotor support frame includes a roller, and the roller is used for rolling cooperation with the first journal or the second journal.

5. The rotor disk heartbeat measurement tool according to claim 4, characterized in that: The rotor support frame also includes a fixing plate for supporting the roller, and the fixing plate is provided with the guiding protrusion.

6. The rotor disk heartbeat measurement tool according to claim 4, characterized in that: The first journal and the second journal include protrusions, the roller includes a circumferential groove, and the protrusions are embedded in the circumferential groove.

7. The rotor disk heartbeat measurement tool according to claim 2, characterized in that: The support base includes a pair of elongated members, and the pair of elongated members are respectively used to connect with the measuring rod support frame and the rotor support frame to drive the measuring rod support frame and the rotor support frame to move up and down.

8. The rotor disk heartbeat measurement tool according to claim 7, characterized in that: The elongated member is a threaded member or a pneumatic component.

9. The rotor disk heartbeat measurement tool according to claim 8, characterized in that: The threaded member is axially limited on the support base by a retaining ring.

10. The rotor disk heartbeat measurement tool according to claim 1, characterized in that: The measuring rod comprises a screw, a rod body and a measuring seat, the screw and the rod body penetrate the measuring seat, the screw is threadedly connected with the measuring seat, the rod body is rotatably matched with the measuring seat, and the sensor is fixed on the measuring seat; The screw is used to drive the measuring seat to move axially and rotate.

11. The rotor disk heartbeat measurement tool according to claim 10, characterized in that: Both ends of the rod body are provided with snap rings, and the top of the measuring rod support frame is provided with a snap groove matched with the snap rings.

12. The rotor disk heartbeat measurement tool according to claim 10, characterized in that: The measuring rod support also includes an escape groove for escaping the screw rod.

13. The rotor disk heartbeat measurement tool according to claim 1, characterized in that: The support base is provided with universal wheels.

14. The rotor disk heartbeat measurement tool according to claim 1, characterized in that: The measuring rod also includes a micro camera.

15. A method for measuring the heartbeat of a rotor disk, characterized in that: The rotor disk heartbeat measurement tool according to any one of claims 1 to 14 is used for measurement, and the method comprises the following steps: Placing a first journal and a second journal of the rotor on a pair of rotor support frames respectively; The measuring rod with the sensor is extended into the disc cavity of the rotor, and both ends are respectively placed on a pair of measuring rod support members; Rotate the measuring rod so that the sensor probe on the measuring rod abuts against the cylindrical surface of the rotor disc core; The height of the measuring rod support and / or the rotor support frame is adjusted so that the sensor probe on the measuring rod can contact the cylindrical surface of the rotor disk core with different inner diameters.

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