Tool and method for carrying out flexibility inspection on engine rotor by simulating rotation of motor

Abstract

The invention discloses a tool and method for carrying out flexibility inspection on an engine rotor by simulating motor rotation, the tool mainly comprises a tool front part, a tool middle part and a tool tail part, the tool front part comprises a spline and a positioning pin which are arranged on one surface of a mounting seat, and a straight gear I arranged on the other surface of the mounting seat; the tool middle part comprises a straight gear II meshed with the straight gear I and a bevel gear I fixed on one surface of the straight gear II; the tool tail comprises a second bevel gear meshed with the first bevel gear and a hand rocker fixed to the tail of the second bevel gear. The detection method comprises the steps that after the tool is installed, the crank handle is rotated to drive the engine rotor to rotate at a low speed, and the flexibility of the rotor is detected by judging the rotating hand feeling. According to the invention, the function of checking the rotation flexibility of the axial-flow air compressor can be realized without dismounting the air inlet channel, the structure is simple, the influence on judgment caused by abnormal sound is not easily generated, the flexibility of the engine rotor can be simply and effectively checked, and the checking result is stable and reliable.

Description

Technical Field

[0001] The invention relates to the field of turboprop engines, and in particular to a tool and a method for simulating motor rotation to perform flexibility inspection on an engine rotor. Background Art

[0002] During the test of the aircraft turboprop engine, the axial compressor rotor needs to be checked for flexibility and scratch-free rotation after each stop. There are currently two conventional methods for checking the flexibility of the axial compressor rotor:

[0003] First, remove the front end of the compressor inlet and disconnect the starter motor, and then manually rotate the first-stage blades of the axial compressor. The disadvantages of this solution are that the operation is relatively complicated and the disassembly and reassembly takes a long time; and frequent disassembly and assembly of the inlet can easily cause the sealing rubber ring at the connection to be cut, breeding the hidden danger of redundant objects.

[0004] Use the starter motor to directly run the cold machine. The disadvantages of this solution are that the motor has a high speed and loud noise, the test driver cannot find the jamming phenomenon in time in the control room through the intercom system, and it is easy to expand the scope of damage.

[0005] The invention application with publication number CN117145595A discloses an aircraft engine blade rotation device, which adopts the method of external stepper motor, and drives the coupling through the stepper motor on the fixed frame to rotate the worm gear in the gear box, and the worm gear shaft transmits torque to the spline shaft, and the spline shaft transmits the rotation to the gear set of the central transmission device, and the gear transmission drives the engine shaft to rotate, thereby rotating the engine blades. Although the above patent effectively improves the inspection efficiency during inspection, it still needs to be positioned and installed in advance and the motor needs to be debugged, and the overall operation is still relatively complicated. Summary of the invention

[0006] In view of this, an object of the present invention is to provide a tool and method for simulating the rotation of an engine rotor to check the flexibility of the engine rotor. Without removing the intake duct, the engine rotor can be rotated by controlling the tool, so that the flexibility of the engine rotor can be checked simply and effectively.

[0007] In one aspect of the present invention, a tool for simulating motor rotation to check the flexibility of an engine rotor is provided, comprising:

[0008] The front part of the tooling, the middle part of the tooling, and the tail part of the tooling;

[0009] The front part of the tooling has a spline, a mounting seat, a spur gear 1, and a positioning pin. The mounting seat is provided with a positioning pin, which can cooperate with the mounting part on the engine for positioning. The spline and the spur gear 1 are respectively fixed on the two sides of the mounting seat through ball bearings, and the spline and the positioning pin are in the same plane. The middle part of the tooling has a spur gear 2 and a bevel gear 1. The spur gear 2 is connected to the bottom of the bevel gear 1 by welding, and the spur gear 2 is meshed with the spur gear 1 at the front part of the tooling. The rear part of the tooling has a bevel gear 2 and a hand crank. The hand crank is welded to the bottom of the bevel gear 2, and the bevel gear is meshed with the bevel gear 1 in the middle part of the tooling.

[0010] Furthermore, the spline is subjected to anodizing surface treatment to increase the corrosion resistance of the spline and improve the service life of the tooling.

[0011] Furthermore, the spline connection is to the gear set inside the engine, and the rotation of the hand crank can be directly transmitted to the gear set inside the engine through the gear combination of the tooling, thereby realizing low-speed rotation of the axial compressor rotor.

[0012] Furthermore, the internal gear transmission ratio of the tooling is the same as the actual transmission ratio in the engine accessory gear set, so one rotation of the hand crank corresponds to one rotation of the axial compressor rotor, thereby controlling the rotor rotation rate not to be too fast, ensuring that no abnormal scraping occurs between the engine blades and the guide vane, while also simulating the real feel of hand-operating the compressor rotor.

[0013] Furthermore, the hand crank is subjected to anti-slip polishing treatment.

[0014] Furthermore, the positioning pin is a positioning piece extending along the axial direction of the mounting seat and plug-fitting with the mounting hole on the engine.

[0015] Furthermore, a clamp fixing edge is provided on the mounting seat, and after the tooling is installed, the clamp is used for circumferential fixation.

[0016] Another aspect of the present invention provides a method for checking the flexibility of an engine rotor by simulating the rotation of an electric motor, comprising the following steps: without disassembling the axial flow compressor, aligning the locating pins, connecting the spline to the corresponding spline sleeve on the engine, and using a clamp to fix it circumferentially, the transmission ratio of the tooling is the same as the actual transmission ratio in the engine accessory gear set, and the spline drives the axial flow compressor rotor to rotate at a low speed by manually operating the hand crank. The operator's method of checking and determining the flexibility of the engine rotor using the tooling is consistent with the method of manually turning the axial flow blades.

[0017] Furthermore, the tooling is powered by manually rotating a crank handle, bevel gear one and bevel gear two are first-stage speed change, spur gear one and spur gear two are second-stage speed change, and the rotation amplitude of the crank handle can be controlled to control the axial compressor rotor to rotate to a free position.

[0018] Furthermore, the tooling changes the movement direction of the operator's hand from the engine axis to perpendicular to the engine axis through a combination of bevel gears, thereby increasing the movement space during operation.

[0019] The present invention has the following advantages:

[0020] 1. The tool is connected to the gear set of the engine through a spline and fixed with a clamp. This installation method is simple and can check the flexibility of the axial compressor rotor without disassembling the intake duct.

[0021] 2. The tool changes the direction of rotation through the combination of bevel gears, which reduces the size of the tool and facilitates installation and inspection in a small space.

[0022] 3. This tool simulates the same transmission ratio of the engine accessory gear set and the manual operation of the hand crank to drive the axial compressor rotor to rotate at a low speed, thus avoiding the operational risk of scraping the engine blades and guides due to excessive motor speed when using the starting motor for disc rotor inspection. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is the engine gear transmission combination.

[0024] Figure 2 This is a schematic diagram of the tooling structure.

[0025] Figure 3 This is a diagram showing the position of the tooling installed on the engine.

[0026] Figure 4 This is a diagram of the installation interface and quick-release clamp.

[0027] In the figure: 1 spline, 2 mounting seat, 3 spur gear 1, 4 positioning pin, 5 spur gear 2, 6 bevel gear 1, 7 bevel gear 2, 8 hand crank. DETAILED DESCRIPTION

[0028] In order to more clearly understand the above-mentioned objectives, features and advantages of the present disclosure, the scheme of the present invention will be further described below. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0029] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein; it is obvious that the embodiments in the specification are only part of the embodiments of the present invention, rather than all of the embodiments.

[0030] In order to facilitate understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. Embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the inventive content of the present application more thorough and comprehensive.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification are only for describing specific embodiments and are not intended to limit the present application.

[0032] Example 1

[0033] like Figure 2 In this embodiment, a tooling is provided for simulating the rotation of a motor to check the flexibility of an engine rotor, including: a spline 1, a mounting seat 2, a spur gear 1 3, a locating pin 4, a spur gear 2 5, a bevel gear 1 6, a bevel gear 2 7, and a hand crank 8.

[0034] Furthermore, the spline is a 12-tooth spline, the spur gear 1 3 is a 17-tooth spur gear, the spur gear 2 5 is a 34-tooth spur gear, the bevel gear 1 6 is an 18-tooth bevel gear, and the bevel gear 2 7 is a 45-tooth bevel gear.

[0035] Furthermore, a locating pin 4 is arranged on the surface of the mounting seat 2, and the locating pin 4 can cooperate with the mounting part on the engine for positioning. The spline 1 and the spur gear 3 are respectively fixed on the two sides of the mounting seat 2 through ball bearings, and the spline 1 and the locating pin 4 are in the same plane.

[0036] Further, spur gear 1 3 is meshed with spur gear 2 5, and bevel gear 1 6 is meshed with bevel gear 2 7. Spur gear 2 5 is connected to the bottom of bevel gear 1 6 by welding, and hand crank 8 is connected to the bottom of bevel gear 2 7 by welding.

[0037] like Figures 1 to 4 The spline 1 is subjected to anodizing surface treatment to increase corrosion resistance and prolong the service life of the tooling.

[0038] Furthermore, the spline 1 is connected to the gear set inside the engine, and the rotation of the hand crank 8 can be directly transmitted to the gear set inside the engine through the gear combination of the tooling, thereby realizing the low-speed rotation of the axial compressor rotor.

[0039] Furthermore, the gear ratio inside the tooling is the same as the gear ratio inside the engine accessory gear set, and one rotation of the hand crank 8 corresponds to one rotation of the axial compressor rotor.

[0040] Furthermore, the hand crank 8 is subjected to anti-slip polishing treatment.

[0041] Furthermore, the positioning pin 4 is a positioning piece extending along the axial direction of the mounting seat 2 and plugged into the mounting hole on the engine. The shapes of the positioning pin 4 may be different in different embodiments, but the functions are the same, and they are all used for positioning during tooling installation.

[0042] Furthermore, a clamp fixing edge is provided on the mounting seat 2, and after the tooling is installed, the clamp is used for circumferential fixation.

[0043] Example 2

[0044] The implementation method of Example 2 is generally consistent with that of Example 1, and can achieve the same technical effect as Example 1, except that: for different models of aircraft engines, the transmission ratio of the gear set of the tooling and the transmission ratio of the engine compressor rotor to the starter motor gear need to be designed to be the same.

[0045] Furthermore, in different embodiments, the shape of the spline 1 may be different, but the functions are the same. The design of the spline 1 matches the internal gear set of the aircraft accessory casing to realize the rotation of the engine rotor.

[0046] Example 3

[0047] Based on the various embodiments of the tooling for checking the flexibility of the engine rotor by simulating the rotation of the motor as described above, this embodiment also provides corresponding inspection method embodiments. After the engine stops, remove the starter motor. Without disassembling the axial flow compressor, connect the spline 1 of the tooling to the corresponding spline sleeve on the engine, and align the locating pin 4 at the same time, and use a fixing clamp to fix the tooling circumferentially. The transmission ratio of the tooling is the same as the actual transmission ratio in the engine accessory gear set, and one rotation of the hand crank 8 corresponds to one rotation of the axial flow compressor rotor. By manually operating the hand crank 8, the spline 1 drives the axial flow compressor rotor to rotate at a low speed. The operator's method of checking and judging the flexibility of the engine rotor using the tooling is consistent with the method of manually turning the axial flow blades.

[0048] Furthermore, the tooling is powered by manually rotating a crank handle 8, bevel gear 1 6 and bevel gear 2 7 are first-stage speed change, spur gear 1 3 and spur gear 2 5 are second-stage speed change, and the rotation amplitude of the crank handle 8 can be controlled to control the axial compressor rotor to rotate to a free position.

[0049] Furthermore, the tooling changes the movement direction of the operator's hand from the engine axis to perpendicular to the engine axis through a combination of bevel gears, thereby increasing the movement space during operation.

[0050] So far, various embodiments of the present invention have been described in detail. In order to avoid obscuring the concept of the present invention, some details known in the art are not described. Based on the above description, those skilled in the art can fully understand how to implement the technical solution disclosed here.

[0051] Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present invention. It should be understood by those skilled in the art that the above embodiments may be modified or some technical features may be replaced by equivalents without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A tool for simulating the rotation of a motor to check the flexibility of an engine rotor, characterized in that: Including the front part, the middle part and the tail part of the tooling; The front part of the tooling comprises a spline (1), a mounting seat (2), a spur gear one (3), and a positioning pin (4); the spline (1) and the spur gear one (3) are respectively connected to two sides of the mounting seat (2), and the positioning pin (4) and the spline (1) are on the same side; The middle part of the tooling includes a spur gear 2 (5) and a bevel gear 1 (6), wherein the spur gear 2 (5) is connected to the bottom of the bevel gear 1 (6), and the spur gear 2 (5) is meshed with the spur gear 1 (3) at the front part of the tooling; The tail portion of the tooling comprises a second bevel gear (7) and a hand crank (8), wherein the hand crank (8) is fixed to the bottom of the second bevel gear (7), and the second bevel gear (7) is meshed with a first bevel gear (6) in the middle portion of the tooling.

2. The tool for checking the flexibility of an engine rotor by simulating the rotation of a motor according to claim 1, characterized in that: The spline (1) is subjected to anodizing surface treatment.

3. The tool for checking the flexibility of an engine rotor by simulating the rotation of a motor according to claim 1, characterized in that: The tooling is connected to the internal gear set of the engine via a spline (1), and the rotation of the hand crank (8) is transmitted to the internal gear set of the engine via the gear combination of the tooling, thereby realizing low-speed rotation of the axial compressor rotor.

4. The tool for checking the flexibility of an engine rotor by simulating the rotation of a motor according to claim 1, characterized in that: The gear set transmission ratio of the tooling is the same as the transmission ratio of the engine compressor rotor to the starter motor gear.

5. The tool for checking the flexibility of an engine rotor by simulating the rotation of a motor according to claim 1, characterized in that: The surface of the hand crank (8) is subjected to anti-skid polishing treatment.

6. The tool for checking the flexibility of an engine rotor by simulating the rotation of a motor according to claim 1, characterized in that: The positioning pin (4) is a positioning piece extending along the axial direction of the mounting seat (2) and plugging and cooperating with the mounting hole on the engine.

7. The tool for checking the flexibility of an engine rotor by simulating the rotation of a motor according to claim 1, characterized in that: After the tooling is installed, the mounting seat (2) and the mounting surface of the engine are circumferentially fixed by a clamp.

8. A method for checking the flexibility of an engine rotor by simulating the rotation of a motor according to claims 1 to 7, characterized in that: The invention comprises the following steps: without disassembling the axial flow compressor, aligning the positioning pin to connect the spline (1) to the corresponding spline sleeve on the engine, and fixing it circumferentially with a clamp; the transmission ratio of the tool is the same as the actual transmission ratio in the engine accessory gear set; the spline (1) drives the axial flow compressor rotor to rotate at a low speed by manually operating a hand crank (8); the operator uses the tool to check and determine the flexibility of the engine rotor in the same way as the manual inspection and determination method of the axial flow blades.

9. The method for checking the flexibility of an engine rotor by simulating the rotation of a motor according to claim 8, characterized in that: The tooling is powered by manually rotating a crank handle (8), bevel gear 1 (6) and bevel gear 2 (7) form a first-stage speed change, spur gear 1 (3) and spur gear 2 (5) form a second-stage speed change, and the axial compressor rotor can be rotated to a free position.

10. The method for checking the flexibility of an engine rotor by simulating the rotation of a motor according to claim 8, characterized in that: By combining bevel gear 1 (6) and bevel gear 2 (7), the operating direction of the operator's hand is changed from the engine axial direction to perpendicular to the engine axial direction.

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