A method for using a dynamic balancing device having a core machine unit bearing mechanism

Abstract

The application discloses a kind of dynamic balancing device using method containing core machine unit bearing mechanism, comprising the following steps: S1, construct analog support environment: in final assembly station, the rear bearing of supporting rotor is assembled with a split type detection bearing seat tooling outside machine case into rigid module;S2, system integration and sensing coupling: rotor system is loaded into machine case;S3, in situ balance debugging;S4, tooling conversion and state solidification;The application belongs to the field of aero-engine and gas turbine manufacturing and assembly technology, and the technical effect reached is: by using detection bearing seat tooling with exactly same installation interface and internal cavity structure with formal bearing seat tooling, it is ensured that the mechanical support environment of rotor during balancing test is completely consistent with real working environment, which makes the perfect balance state debugged in test state can be preserved without damage, completely after replacing formal tooling, reduce error source.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical fields of aero-engine and gas turbine manufacturing and assembly, in particular to a method for using a dynamic balancing device containing a core engine unit bearing mechanism. BACKGROUND

[0002] When the rotor of an aero-engine core engine (usually including a high-pressure compressor, a combustor and a high-pressure turbine) is dynamically balanced, the traditional process has inherent defects. The traditional method is to place the rotor (including the shaft, the high-pressure rotor and the high-pressure turbine rotor) separately on an external balancing machine for adjustment. After the balance meets the standard, the rotor is disassembled, assembled into the casing and the high-pressure turbine rotor is reinstalled. This "balancing-disassembly-reassembly" process inevitably introduces assembly errors, destroys the adjusted balance state, causes the whole machine vibration to exceed the standard, and requires repeated debugging, which seriously affects the production efficiency and product reliability.

[0003] Therefore, the existing needs are not met, and for this purpose, we propose a method for using a dynamic balancing device containing a core engine unit bearing mechanism. SUMMARY

[0004] To this end, the present application provides a method for using a dynamic balancing device containing a core engine unit bearing mechanism to solve the above problems in the prior art.

[0005] In order to achieve the above-mentioned purpose, the present application provides the following technical scheme:

[0006] According to the first aspect of the present application, a method for using a dynamic balancing device containing a core engine unit bearing mechanism, comprising: achieving high-precision balancing by simulating real support boundary conditions and directly measuring dynamic force at the final assembly stage, comprising the following steps:

[0007] S1, constructing a simulated support environment: at the final assembly station, the rear bearing of the rotor is assembled with a split detection bearing seat tooling outside the casing to form a rigid module, wherein the detection bearing seat tooling is configured to simulate the support stiffness and dynamic boundary conditions of the real engine bearing seat;

[0008] S2, system integration and sensor coupling: assemble the rotor system into the casing; install the assembled rigid module to the corresponding installation interface of the casing, and integrate a force sensing unit for directly measuring the unbalance force of the rotor on the force transmission path; connect the driving mechanism and the balancing analysis system;

[0009] S3, in-situ balancing debugging: drive the rotor system to rotate, calculate the unbalance of the rotor system based on the dynamic force signal measured by the force sensing unit using the hard support dynamic balancing principle; according to the calculation result, adjust the in-situ weight of the rotor system through the pre-set operation window on the casing;

[0010] S4, tool conversion and state solidification: after the balance is up to the standard, the rear bearing is taken out from the detection bearing seat tool and installed to the formal bearing seat tool, so as to realize the non-destructive transplantation and solidification of the balance state obtained by debugging to the final product state.

[0011] Further, step S1 constructs a simulation support environment, realizes non-destructive and rapid clamping of the rear bearing by placing the rear bearing into the cavity of the split detection bearing seat tool and locking the two split housings by fasteners, and forms a rigid functional module that can be transplanted as a whole.

[0012] Further, in the system integration and sensing coupling step S2, when the rigid module is installed to the rear bracket, it is ensured that the installation interface, connection size and internal bearing cavity structure are consistent with the formal bearing seat tool, so as to accurately simulate the dynamic boundary conditions of the rotor under real service.

[0013] Further, the specific method of integrating the force sensing unit on the force transmission path is to arrange a piezoelectric force sensor group between the installation flanges of the detection bearing seat tool and the rear bracket, for directly detecting and collecting dynamic force vector signals excited by the rotor imbalance.

[0014] Further, the system integration and sensing coupling also includes arranging a key phase sensor for capturing the phase reference signal of the rotating shaft during rotation.

[0015] Further, the specific method of calculating the imbalance amount by using the hard support dynamic balancing principle is that the balance analysis system receives the force signal and the phase signal, extracts the dynamic force component synchronous with the rotating speed through frequency spectrum analysis, and calculates the size and phase angle of the imbalance mass moment in two preset correction planes based on the influence coefficient method or the least square algorithm.

[0016] Further, the specific method of performing in-situ weight adjustment is that the operator removes the sealing plate of the window on the casing according to the instructions of the balance analysis system, and directly adds, deletes or adjusts the weight mechanism on the exposed rotor disc through the window without disassembling and hoisting out the rotor system.

[0017] Further, the weight adjustment operation is performed on the last stage disc of the high pressure rotor or high vortex rotor, and the weight is realized by operating the pre-set weight threaded hole on the disc.

[0018] Further, it also includes an operation sub-step of enabling an auxiliary support mechanism to temporarily support the cantilever end of the rotating shaft before disassembling the detection bearing seat tool in the tool conversion and state solidification step.

[0019] Further, the auxiliary support mechanism is enabled by driving the telescopic drive member to act, so that the roller connected to the output end thereof is lifted and forms rolling contact with the roller surface of the rotating shaft to safely bear the weight of the rotor system.

[0020] The present application has the following advantages:

[0021] 1. The use method of the dynamic balancing device containing a core engine unit bearing mechanism, by adopting a detection bearing seat tooling having the same installation interface and internal cavity structure as the formal bearing seat tooling, ensures that the mechanical support environment of the rotor during the balancing test is completely consistent with the real working environment, which makes the perfect balance state debugged in the test state be preserved intact and completely after the formal tooling is replaced, fundamentally eliminates the error sources such as reference change and bolt pre-tightening force difference caused by secondary assembly in the traditional process, and realizes the ultimate balancing precision.

[0022] 2. The use method of the dynamic balancing device containing a core engine unit bearing mechanism, the split type shell design realizes safe and reliable clamping of the bearing outside the bearing housing through the cooperation of the two shells and the connecting piece, and after the stable "bearing-tooling" module is formed, the whole installation is carried out, which completely avoids the high-risk operation of pressing or impact disassembly of high-precision bearings in the narrow space inside the engine, not only greatly reduces the operation difficulty and the requirement for personnel skills, but more importantly, fundamentally protects the precision and reliability of the bearing, and improves the safety and robustness of the whole process.

[0023] 3. The use method of the dynamic balancing device containing a core engine unit bearing mechanism, by integrating the piezoelectric force sensor group and the key phase sensor to form a high-rigidity measurement system, and combining the calibration window provided on the bearing housing, a high-efficiency "perception-computation-execution" closed-loop system is established, so that the high-precision dynamic balancing process can be seamlessly embedded into the assembly process, and the steps of repeatedly lifting and disassembling the rotor are saved, which greatly shortens the assembly cycle of the engine while ensuring the quality, and improves the production efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is a front view of the use method of the dynamic balancing device containing a core engine unit bearing mechanism proposed by the present application;

[0025] Figure 2 It is an exploded view of Figure 1

[0026] Figure 3 It is a side view of Figure 2

[0027] Figure 4 It is a front view of Figure 2 ​​​

[0028] Figure 5 is a schematic exploded view of the rear bracket; Figure 3

[0029] Figure 6 is a sectional view of the rear bracket; Figure 5

[0030] Figure 7 is a front view of the rear bracket; Figure 6

[0031] Figure 8 is a front view of the rear bracket;

[0032] Figure 9 is a side view of the rear bracket; Figure 8

[0033] Figure 10 is a right view of the rear bracket; Figure 8

[0034] Figure 11 is a sectional view of the rear bracket;

[0035] Figure 12 is a sectional side view of the rear bracket.

[0036] In the figure: 1, machine case; 101, window; 102, cover plate; 2, support adapter tool; 3, rotating shaft; 301, roller shaft; 302, high-pressure rotor; 303, high-vortex rotor; 401, front bearing; 402, front bracket; 403, rear bearing; 404, rear bracket; 405, through hole; 406, connecting flange; 5, detection bearing seat tool; 501, shell; 502, fixed cavity; 503, connecting piece; 504, connecting hole; 505, fixed hole; 601, piezoelectric force sensor group; 602, key phase sensor; DETAILED DESCRIPTION

[0037] The following will illustrate the embodiments of the present application by specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the disclosure. Obviously, the described embodiments are part of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0038] Example 1:

[0039] With reference to Figure 1 - Figure 12 A dynamic balancing device using method containing a core machine unit bearing mechanism, comprising:

[0040] ​​​​​The core fixed base is the casing 1, and the support adapter 2 is fixed on the two side walls of the casing 1 by bolts to stably support the whole core unit on the external support;

[0041] The rotor system is provided with a rotating shaft 3 in the casing 1, and the rotating shaft 3 comprises a roller shaft 301 and a high-pressure rotor 302 and a high-vortex rotor 303 fixedly installed on the roller shaft 301;

[0042] The standard support end is provided with a front bearing 401 and a front support 402 to rotatably connect the left end of the rotating shaft 3 with the casing 1;

[0043] The measurement support end is connected with the casing 1 through a rear bearing 403, and the core of the measurement support end is that a detection bearing seat tool 5 is installed on the rear support 404 by bolts, and the rear bearing 403 is accommodated in the detection bearing seat tool 5;

[0044] The detection bearing seat tool 5 comprises two housings 501, and arc-shaped fixing cavities 502 are symmetrically formed in the inner sides of the two housings 501, and the two fixing cavities 502 jointly form a complete cylindrical cavity for accommodating and clamping the rear bearing 403; connecting pieces 503 (such as ear plates) are arranged on the two sides of the two housings 501, and the two housings 501 are fastened together by bolts passing through fixing holes 505 on the connecting pieces 503, so that the rear bearing 403 is reliably fixed in the tool; the detection bearing seat tool 5 is installed on the connecting flange 406 on the outer side of the rear support 404 through the connecting holes 504 on the housings 501; the shape and size of the detection bearing seat tool 5, the connecting interface (i.e. the position and size of the connecting holes 504) and the structure of the internal fixing cavities 502 are completely same as the corresponding structures of the formal bearing seat tool, which ensures the consistency of the support stiffness and the boundary conditions from the perspective of rotor dynamics;

[0045] The integrated measurement system is provided with a piezoelectric force sensor group 601 between the mounting interface between the base of the detection bearing seat tool 5 and the connecting flange 406 of the rear support 404; and a key phase sensor 602 is installed on the outer side of the detection bearing seat tool 5 to detect the key phase mark on the rotating shaft 3;

[0046] The driving and correction system is connected with the left end of the rotating shaft 3 through a connecting shaft; a window 101 is formed on the casing 1 opposite to the rotor correction plane, and the window is sealed by a detachable sealing plate 102;

[0047] The whole machine assembly, detection and balancing process is as follows:

[0048] 1. Tooling installation: rotor system is installed into the casing 1; the rear bearing 403 is clamped and fixed in the detection bearing seat tooling 5 according to the structure and method described above; the assembled detection bearing seat tooling 5 is installed onto the connecting flange 406 of the rear support 404 through the bolt passing through the connecting hole 504;

[0049] 2. System fixation and connection: the casing 1 is fixed through the support adapter tooling 2; the driving mechanism is connected; the signal output ends of the piezoelectric force sensor group 601 and the key phase sensor 602 are connected to the balance analysis system through the cable;

[0050] 3. Data acquisition: the rotor is driven to rotate to the balance speed; the sensor acquires data;

[0051] 4. Unbalance amount calculation and counterweight instruction: the balance analysis system is configured to perform the following specific functions: receiving the key phase sensor 602 signal as a reference; receiving the piezoelectric force sensor group 601 signal and performing signal conditioning (such as amplification, filtering) and frequency spectrum analysis (such as fast Fourier transform FFT); calculating the size and phase of the unbalance amount in two correction planes based on the known influence coefficient method or least square method algorithm; outputting the counterweight addition instruction to the operator;

[0052] 5. Counterweight operation: the operator disassembles the cover plate 102 of the corresponding window 101 according to the instruction and uses the tool to operate the counterweight mechanism (such as the counterweight bolt in scheme P2) on the rotor;

[0053] 6. Verification: repeat steps 3-5 (data acquisition and counterweight operation) until the balance is qualified;

[0054] 7. Final state recovery: after the balance is completed, the driving mechanism and the connecting shaft are disassembled; the detection bearing seat tooling 5 is disassembled from the rear support 404, the shell connecting bolts are loosened, the two shells 501 are opened, and the rear bearing 403 is separated; then, the formal bearing seat tooling is connected with the rear bearing 403, and the formal tooling is installed onto the rear support 404; finally, all the cover plates 102 are assembled back;

[0055] Working principle: the device works based on the hard support dynamic balance measurement principle and the boundary condition simulation consistency principle; the piezoelectric force sensor group 601 integrated between the detection bearing seat tooling 5 and the connecting flange 406 constitutes a high-rigidity measurement system, the natural frequency of which is much higher than the working speed of the rotor, and it can directly and accurately measure the dynamic force vector caused by the unbalance of the rotor, rather than the vibration displacement, has strong anti-interference ability, and the measurement result is direct and accurate; the key phase sensor 602 provides an accurate phase reference;

[0056] The core function of the split housing design of the two housings 501 is to realize the lossless clamping and rapid transplantation of the bearing; it allows the rear bearing 403 to be safely and reliably fixed as a rigid module outside the case, avoiding the high risk of press-fitting or impact operation on high-precision bearings in a narrow space, greatly improving the operation safety and equipment reliability, and reducing the harsh requirements on the skills of the operators; this device seamlessly embeds the high-precision dynamic balancing process into the assembly process, eliminating the steps of repeatedly lifting and disassembling the rotor, greatly shortening the assembly cycle of the engine and improving the production efficiency.

[0057] Embodiment Two:

[0058] The same as Embodiment One, and further, a dynamic balancing device using method containing a core machine unit bearing mechanism provides three preferred counterweight installation position schemes:

[0059] Scheme P1 (counterweight disc scheme): special counterweight discs are machined or installed at the left and right ends of the roller shaft 301 of the rotating shaft 3, and the discs are provided with evenly distributed threaded holes or T-shaped grooves for installing counterweight blocks or balance screws;

[0060] Scheme P2 (wheel disc scheme, preferred): directly use the existing largest diameter disc on the rotor assembly as the correction plane; that is, install holes (such as evenly distributed threaded blind holes) on the last stage compressor disc of the high-pressure rotor 302 and the turbine disc of the high-turbine rotor 303 for screwing in counterweight bolts of different specifications or installing counterweight blocks.

[0061] Embodiment Three:

[0062] The same as Embodiment One, and further, the inside of the rear support 404 is provided with a hollow structure, the inner wall of which is provided with an extension rod 701, the output end of the extension rod 701 is fixedly connected with a connecting frame 702, one end of the connecting frame 702 is rotatably connected with a roller 703 on both sides, and the outer wall of the roller 703 is in rolling connection with the outer wall of the roller shaft 301; when it is necessary to disassemble the bearing seat detection tool 5, the extension rod 701 is controlled to drive the connecting frame 702 and the roller 703 to rise, so that they are in contact with the outer wall of the roller shaft 301.

[0063] Working principle: after balancing, disassemble the driving mechanism and the connecting shaft; start the extension rod 701 to make the roller 703 rise and support the roller shaft 301; disassemble the detection bearing seat tool 5 from the rear support 404, loosen the housing connecting bolts, open the two housings 501, and separate from the rear bearing 403; then, connect the formal bearing seat tool with the rear bearing 403, and install the formal tool on the rear support 404; finally, retract the auxiliary support and install all the sealing plates 102.

Claims

1. A method of using a dynamic balancing apparatus having a core machine unit bearing mechanism, characterized by, High-precision balancing is achieved by simulating real support boundary conditions and directly measuring dynamic force in the assembly stage, including the following steps: S1, constructing a simulated support environment: in the assembly station, the rear bearing of the support rotor is assembled with a split detection bearing seat tooling outside the casing to form a rigid module, wherein the detection bearing seat tooling is configured to simulate the support stiffness and dynamic boundary conditions of the real engine bearing seat; S2, system integration and sensing coupling: the rotor system is installed in the casing; the assembled rigid module is installed to the corresponding installation interface of the casing, and a force sensing unit for directly measuring the unbalance force of the rotor is integrated in the force transmission path; the driving mechanism and the balancing analysis system are connected; the specific method of integrating the force sensing unit in the force transmission path is to arrange a piezoelectric force sensor group between the detection bearing seat tooling and the mounting flange of the rear support for directly detecting and collecting dynamic force vector signals excited by the rotor unbalance; S3, in-situ balancing debugging: drive the rotor system to rotate, calculate the unbalance of the rotor system based on the dynamic force signals measured by the force sensing unit using the hard support dynamic balancing principle; and according to the calculation result, adjust the rotor system in-situ through the pre-set operation window on the casing; S4, tooling conversion and state solidification: after the balancing is qualified, the rear bearing is removed from the detection bearing seat tooling and installed to the formal bearing seat tooling, so as to realize the non-destructive transplantation and solidification of the balancing state obtained in the debugging to the final product state.

2. The method of using a dynamic balancing apparatus having a core machine cell bearing mechanism of claim 1, wherein, In step S1 of constructing a simulated support environment, the rear bearing is clamped non-destructively and quickly by being placed in the cavity of the split detection bearing seat tooling and locked by fasteners, forming a rigid functional module that can be transplanted as a whole.

3. The method of using a dynamic balancing apparatus having a core machine cell bearing mechanism of claim 1, wherein, In step S2 of system integration and sensing coupling, when the rigid module is installed to the rear support, the installation interface, connection size and internal bearing cavity structure are ensured to be consistent with the formal bearing seat tooling, so as to accurately simulate the rotor dynamic boundary conditions under real service.

4. The method of using a dynamic balancing apparatus having a core machine cell bearing mechanism of claim 1, wherein, The system integration and sensing coupling also includes setting a key phase sensor for capturing the phase reference signal of the rotating shaft during rotation.

5. The method of using a dynamic balancing apparatus having a core machine cell bearing mechanism of claim 1, wherein, The specific method of calculating the unbalance using the hard support dynamic balancing principle is that the balancing analysis system receives the force signal and the phase signal, extracts the dynamic force component synchronous with the rotating speed through frequency spectrum analysis, and calculates the size and phase angle of the unbalance mass moment in two preset correction planes based on the influence coefficient method or the least square algorithm.

6. The method of using a dynamic balancing apparatus having a core machine cell bearing mechanism of claim 1, wherein, The specific method of in-situ weight adjustment is that the operator removes the sealing plate of the window on the casing according to the instruction of the balancing analysis system, and directly adjusts the weight mechanism on the exposed rotor disc through the window without disassembling or hoisting out the rotor system.

7. The method of using a dynamic balancing apparatus having a core machine cell bearing mechanism of claim 6, wherein, The weight adjustment operation is carried out on the last stage disc of the high pressure rotor or high vortex rotor, and the weight is realized by operating the pre-set weight threaded hole on the disc.

8. The method of using a dynamic balancing apparatus having a core machine cell bearing mechanism of claim 7, wherein, Also included in the tool change and state solidification steps is a sub-step of activating a built-in auxiliary support mechanism to temporarily support the cantilevered end of the rotating shaft before disassembling the detection bearing seat tool.

9. The method of using a dynamic balancing apparatus having a core machine cell bearing mechanism of claim 8, wherein, The auxiliary support mechanism is activated by driving the telescopic drive member to move, causing the rollers connected to the output end thereof to rise and form rolling contact with the rolling surface of the rotating shaft to safely bear the weight of the rotor system.

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