Complete machine state rotor concentricity measuring tool and method

Abstract

The whole machine state rotor concentricity measuring tool comprises a mounting seat, a measuring rod, a pull rod and a measuring head assembly, and the mounting seat is fixed on a rear bearing casing mounting edge of a rotor; one end of the measuring rod is pivoted with the mounting seat to form a lever structure; the pull rod is arranged at one end, pivoted with the mounting seat, of the measuring rod and is used for providing pulling force for the measuring rod so as to drive the measuring rod to rotate around the pivoted part; the measuring head assembly is arranged on the measuring rod. According to the tool, the contact between the measuring head and the disc center cylindrical surface of each stage of disc can be realized under the condition that the rotor is in complete machine assembly, so that the accurate measurement of the concentricity is completed. The invention further provides a whole machine state rotor concentricity measuring method.

Description

Technical Field

[0001] The invention relates to the field of measurement, and in particular to the field of concentricity measurement of a complete engine. Background Art

[0002] Aircraft engines mainly include rotor components and stator components. The rotor components refer to rotating parts, while the stator components refer to non-rotating parts. Among them, the rotor components are formed by multiple stages of rotors connected by bolts, which constitute the engine working parts; the stator components are composed of a front bearing casing, multiple transfer casings and a rear bearing casing, which are mainly used to support the rotor and change the airflow direction of each stage of the rotor.

[0003] During the operation of the engine, the rotor rotates at high speed, and the installation coaxiality of each rotor directly affects the safe operation of the engine. When assembling the engine, the rotors at each level are assembled step by step. During assembly, the runout value of the rotor disc center (or connection stop) at each level can be monitored through a turntable to evaluate the installation quality of the rotor. When assembling the rotor, the assembly coaxiality of each disc must be ensured to reduce the uneven mass distribution caused by the rotor's non-concentricity, which causes engine vibration and radial friction between the rotor and stator. However, after the engine is formed, it is impossible to evaluate the concentricity of the rotors at each level through a turntable. In particular, after the engine has been working for a long time, the connecting bolts between the rotors may fail, causing the concentricity of the rotors at each level to exceed the design value. Under the existing technical conditions, it is impossible to evaluate the connection status of the rotors in the whole machine state. Therefore, it is impossible to know whether the rotor connection has failed, and it is difficult to make the correct decision to continue to work or disassemble the engine. Summary of the invention

[0004] An object of the present invention is to provide a rotor concentricity measurement tool in a complete machine state, which can realize the measurement of the rotor concentricity in the complete machine state.

[0005] To achieve the above-mentioned purpose, the whole machine rotor concentricity measurement tooling includes a mounting seat, a measuring rod, a pull rod and a probe assembly. The mounting seat is fixed on the mounting edge of the rear load-bearing casing of the rotor; the measuring rod is used to extend into the inner cavity of the rotor, and one end is pivoted to the mounting seat to form a lever structure; the pull rod is arranged at one end where the measuring rod and the mounting seat are pivoted, and is used to provide pulling force to the measuring rod, thereby driving the measuring rod to rotate around the pivot joint; the probe assembly is arranged on the measuring rod.

[0006] In one or more embodiments, the measuring rod includes a screw rod and a mounting rod, both ends of the mounting rod are provided with bosses that cooperate with the screw rod thread, the probe assembly includes a probe and a probe mounting seat mounted on the mounting rod, the probe mounting seat is also connected to the screw rod thread, and the probe is set to stop at the end of the probe mounting seat.

[0007] In one or more embodiments, a threading hole is provided on the mounting rod.

[0008] In one or more embodiments, the mounting seat includes a clamping boss protruding toward one side of the rotor inner cavity, and the mounting rod is pivotally connected to the mounting seat via the clamping boss.

[0009] In one or more embodiments, the mounting seat includes a through cavity for the mounting rod to pass through, the mounting rod is pivotally connected to the mounting seat at the through cavity, and the through cavity is also configured as a space allowing the measuring rod to rotate.

[0010] In one or more embodiments, the pull rod is fixedly disposed on the mounting rod, or is pivotally connected to the mounting rod.

[0011] In one or more embodiments, the mounting seat also includes a limiting boss protruding toward the opposite side of the rotor inner cavity, the limiting boss includes a hole cavity for the pull rod to pass through, and the end of the pull rod also includes a nut threadedly connected thereto, and the nut is used to abut against the bottom of the limiting boss to limit the position of the pull rod.

[0012] In one or more embodiments, the cavity is a strip-shaped cavity.

[0013] In one or more embodiments, the mounting seat further includes a buckle protruding toward the opposite side of the rotor inner cavity for engaging the pull rod.

[0014] Another object of the present invention is to provide a method for measuring the concentricity of a rotor in a complete machine state, which method is performed using the above-mentioned complete machine rotor concentricity measuring tool, and the method comprises the following steps: fixing the mounting seat on the rear load-bearing casing mounting edge of the rotor; pivotally connecting the measuring rod to the mounting seat, and extending the measuring rod into the inner cavity of the rotor; pulling the pull rod to adjust the radial position of the probe; rotating the rotor to measure the concentricity of the rotor.

[0015] The above-mentioned rotor concentricity measurement tool for the whole machine state uses the rear load-bearing casing mounting edge of the rotor as the fulcrum, and realizes the contact between the probe and the disk cores of different diameters at each stage through a measuring rod extending into the inner cavity of the rotor and a pull rod for adjusting the radial position of the probe. The vibration of the disk core at each stage can be measured by the probe, and it is evaluated whether the connection status of the rotors at each stage meets the working requirements of the engine. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] 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:

[0017] Figure 1 It is a simplified diagram of the engine structure;

[0018] Figure 2 This is a schematic diagram of the rotor concentricity measurement tooling in the complete machine state and the engine in a matching state;

[0019] Figure 3 It is a schematic diagram of the mounting seat and the mounting edge of the rear bearing receiver in a mating state;

[0020] Figure 4 This is a cross-sectional view of the rotor concentricity measurement tool in the complete machine state;

[0021] Figure 5 This is an oblique view of the rotor concentricity measurement tooling in the complete machine state;

[0022] Figure 6 is a front view of an embodiment of a measuring rod;

[0023] Figure 7 is an oblique view of an embodiment of a measuring rod;

[0024] Figures 8A-8B It is a schematic diagram of the structure on both sides of the mounting base.

[0025] Symbols and Markings

[0026] 10 Rotor parts

[0027] 11 Roulette

[0028] 12 stator components

[0029] 13 Connecting bolts

[0030] 14 Front bearing receiver

[0031] 15 Rear bearing receiver

[0032] 16 Adapter

[0033] 17 Front bearing

[0034] 18 Rear bearing

[0035] 19 Rotor cavity

[0036] 20 Mounting Seat

[0037] 21 Clamping boss

[0038] 22 Limiting boss

[0039] 23 Cavity

[0040] 30 Measuring rod

[0041] 31 Screw

[0042] 32 Mounting rod

[0043] 33 Boss

[0044] 35 Pivot

[0045] 40 Tie rod

[0046] 45 Rod

[0047] 46 U-shaped seat

[0048] 50 Probe assembly

[0049] 51 Probe

[0050] 52 Probe Mounting Base

[0051] 54 Data line

[0052] 150 Rear bearing receiver installation edge DETAILED DESCRIPTION

[0053] 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.

[0054] 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.

[0055] like Figure 1 As shown, the engine includes a rotor component 10, a wheel disc 11, a stator component 12, connecting bolts 13, a front load-bearing casing 14, a rear load-bearing casing 15, an adapter casing 16, a front bearing 17, a rear bearing 18 and a rotor cavity 19. The rotor component is formed by connecting multiple stages of rotors through bolts, constituting the engine working parts; the stator component is composed of a front load-bearing casing, multiple adapter casings and a rear load-bearing casing, and is mainly used to support the rotor and change the airflow direction of each stage of the rotor to achieve a diversion effect.

[0056] During the rotation of the rotor, the connection status of the rotor is evaluated by measuring the disc center runout of each stage of the rotor. If the bolts are loose and the rotor connection fails, the measured rotor disc center runout value will inevitably be abnormal. After the engine is assembled, the concentricity of the rotor is difficult to measure accurately. The whole machine rotor concentricity measurement tool disclosed in the present invention is used to measure the concentricity of each stage of the rotor in the whole machine state, and then evaluate whether the connection status of each stage of the rotor meets the working requirements of the engine.

[0057] Reference Figures 2 to 5It is understood that the complete rotor concentricity measuring tool comprises a mounting seat 20, a measuring rod 30, a pull rod 40 and a probe assembly 50. The mounting seat 20 is fixed on the mounting edge of the rear bearing casing, the measuring rod 30 extends into the inner hole 19 of the rotor, and the measuring rod 30 is fixed on the mounting seat 20 in a pivoting manner to form a lever structure, which can rotate around the pivoting part.

[0058] The mounting seat 20 is fixed on the rear bearing casing mounting edge 150 of the rotor. The measuring rod 30 is used to extend into the rotor inner cavity 19. The measuring rod 30 is provided with a probe assembly 50. One end of the measuring rod 30 is pivotally connected to the mounting seat 20 to form a lever structure. The pull rod 40 is provided at one end of the measuring rod 30 pivotally connected to the mounting seat 20 to provide a pulling force in the up and down directions to the measuring rod 30, thereby driving the measuring rod 30 to rotate around the pivot point A. For details, refer to Figure 2 As shown, the pivot position A enables the measuring rod 30 to form a lever structure at point A, which can be moved along Figure 2 The probe assembly 50 moves in the up and down directions as shown, thereby changing the radial position of the probe assembly 50.

[0059] Specifically, Figure 6 and Figure 7 As shown, the measuring rod 30 includes a screw rod 31 and a mounting rod 32, and bosses 33 are provided at both ends of the mounting rod 32 for threaded cooperation with the screw rod 31. The probe assembly 50 includes a probe 51 and a probe mounting seat 52 sleeved on the mounting rod 32, and the probe mounting seat 52 is also threadedly connected to the screw rod 31. The probe 51 is set to stop at the end of the probe mounting seat 52.

[0060] The probe 51 can move axially along the direction of the screw 31 under the drive of the screw 31. When the screw 31 rotates, it can drive the probe mounting seat 52 to reciprocate along the mounting rod 32, and adjust the probe 51 to reach any section in the direction of the engine axis. At the same time, in conjunction with the pull rod 40, the probe 51 can be adjusted in both the axial and radial directions to meet the requirements of the probe 51 contacting the rotor disc core cylindrical surface of different cross-sections and sizes. The axial adjustment of the probe 51 and the rotation of the probe rod 31 are both achieved through the threaded mechanism, which has a high self-locking property and can ensure that the probe is in a stable state during measurement.

[0061] Preferably, the mounting rod 32 is provided with a threading hole for the data line 54 connected to the probe 51 to pass through. Figure 3 and Figure 4 shown.

[0062] In some embodiments of the pivot structure, the mounting seat 20 includes a clamping boss 21 protruding toward one side of the rotor inner cavity 19, and the double clamping boss 21 forms a clamping cavity for accommodating the mounting rod 32, as shown in FIG. Figure 5 and Fig. 8AIt is understood that the mounting rod 32 is pivotally connected to the mounting seat 20 by means of a pin or a pivot member 35 through the clamping boss 21. In other embodiments of the pivot structure, the mounting seat 20 is provided with a through cavity for the mounting rod 32 to pass through, and the mounting rod 32 is pivotally connected to the mounting seat 20 at the through cavity, and the through cavity is also configured to allow the measuring rod 30 to rotate.

[0063] The pull rod 40 is fixedly disposed on the mounting rod 32, or is pivotally connected to the mounting rod 32. Figure 5 In the illustrated embodiment, the pull rod 40 includes a rod body 45 and a U-shaped seat 46 , and the U-shaped seat 46 is pivotally connected to the end of the mounting rod 32 via a connecting member such as a pin or a shaft.

[0064] In order to fix the position of the pull rod 40, the mounting seat 20 further includes a limiting boss 22 protruding toward the opposite side of the rotor cavity, such as in combination with Figure 5 and Figure 8B It is understood that the limiting boss 22 includes a hole 23 for the pull rod 40 to pass through. Figure 5 In the embodiment shown, the cavity 23 is a strip-shaped cavity. The end of the pull rod 40 also includes a nut 41 threadedly connected thereto, and the nut 41 is used to abut against the bottom of the limiting boss 22, such as Figure 4 As shown, the upper and lower positions of the limit pull rod 40 are controlled to further control the radial positions of the mounting rod 32 and the measuring head.

[0065] There may be other embodiments for fixing the pull rod 40, such as the mounting seat further comprising a buckle protruding toward the opposite side of the rotor inner cavity, the buckle is used to engage the pull rod to fix the radial position of the mounting rod 32 and the probe.

[0066] In this way, by squeezing the nut 41 and the limiting boss 22 with the strip-shaped cavity 23, downward pressure is applied to the mounting rod 32, thereby realizing the rotation of the measuring rod 30 around the pivot joint and the adjustment of the measuring head 51 in the radial direction to meet the measurement of disk center runout of different sizes.

[0067] Combined with the introduction of the above-mentioned tooling for measuring the concentricity of the rotor in the whole machine state, a method for measuring the concentricity of the rotor in the whole machine state can also be understood. The method is performed using the above-mentioned tooling and specifically includes the following steps: fixing the mounting seat 20 on the rear load-bearing casing mounting edge 150 of the rotor; pivotally connecting the measuring rod 30 to the mounting seat 20, and extending the measuring rod 30 into the rotor inner cavity 19; pulling the pull rod 40 to adjust the radial position of the probe 51; rotating the rotor to achieve the measurement of the rotor concentricity.

[0068] For wheels of different diameters, the axial position of the probe is adjusted by the screw 31, and the radial position of the screw is adjusted by the pull rod 40 to achieve contact with the center of each stage of the disk, and then measure the beat of the center of each stage of the rotor disk. The beat value is used to determine whether the rotor connection has failed, which serves as a basis for evaluating the rotor connection status.

[0069] 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 multiple times 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.

[0070] 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. The complete machine rotor concentricity measurement tool is characterized by: include: A mounting seat, fixed on the rear bearing casing mounting edge of the rotor; A measuring rod, used to extend into the inner cavity of the rotor, one end of which is pivotally connected to the mounting seat to form a lever structure; a pull rod, disposed at one end where the measuring rod and the mounting seat are pivotally connected, and used to provide a pulling force to the measuring rod, thereby driving the measuring rod to rotate around the pivot point; and The probe assembly is arranged on the measuring rod.

2. The tooling according to claim 1, characterized in that: The measuring rod includes a screw rod and a mounting rod, both ends of the mounting rod are provided with bosses that cooperate with the screw rod thread, the probe assembly includes a probe and a probe mounting seat sleeved on the mounting rod, the probe mounting seat is also connected to the screw rod thread, and the probe is set to stop at the end of the probe mounting seat.

3. The tooling according to claim 1, characterized in that: The mounting rod is provided with a threading hole.

4. The tooling as claimed in claim 2, characterized in that: The mounting seat comprises a clamping boss protruding toward one side of the rotor inner cavity, and the mounting rod is pivotally connected to the mounting seat via the clamping boss.

5. The tooling as claimed in claim 2, characterized in that: The mounting seat comprises a through cavity for the mounting rod to pass through, the mounting rod is pivotally connected to the mounting seat at the through cavity, and the through cavity is also configured as a space allowing the measuring rod to rotate.

6. The tooling as claimed in claim 2, characterized in that: The pull rod is fixedly arranged on the mounting rod, or is pivotally connected to the mounting rod.

7. The tooling according to claim 6, characterized in that: The mounting seat also includes a limiting boss protruding toward the opposite side of the rotor inner cavity, the limiting boss includes a hole cavity for the pull rod to pass through, and the end of the pull rod also includes a nut threadedly connected thereto, the nut is used to abut against the bottom of the limiting boss to limit the position of the pull rod.

8. The tooling according to claim 7, characterized in that: The cavity is a strip-shaped cavity.

9. The tooling according to claim 6, characterized in that: The mounting seat also includes a buckle protruding toward the opposite side of the rotor inner cavity, which is used for engaging the pull rod.

10. The method for measuring the rotor concentricity of the complete machine is characterized by: The method is performed using the complete rotor concentricity measurement tool as described in any one of claims 1 to 9, comprising the following steps: Fix the mounting base on the rear bearing casing mounting edge of the rotor; The measuring rod is pivotally connected to the mounting seat, and the measuring rod is extended into the inner cavity of the rotor; Pull the rod to adjust the radial position of the probe; Rotate the rotor to measure the rotor concentricity.

Images