Aero-engine high-pressure compressor rotor diversified assembly device and assembly method

Abstract

The application discloses an aero-engine high-pressure compressor rotor multi-element assembly device and an assembly method, the assembly device comprising a trolley chassis, a trolley bottom plate, a rotary table and a clamp, wherein the lower end of the trolley chassis is provided with a roller, the trolley bottom plate is fixedly connected to the upper end of the trolley chassis, and a hollow operation area is formed between the lower end of the trolley bottom plate and the upper end of the trolley chassis, the rotary table is rotatably connected to the trolley bottom plate through a thrust ball bearing, and the clamp is arranged above the rotary table and rotates synchronously with the rotary table. The assembly device has the functions of transportation and other functions, and when the device is used for assembly, the purpose of convenient assembly of each process is achieved, and the expected assembly quality, convenient transportation, convenient hoisting and improved assembly efficiency are achieved.

Description

Technical Field

[0001] This invention belongs to the field of high-pressure compressor rotor assembly technology for aero-engines, and particularly relates to assembly tooling, equipment and assembly methods for core components of aero-engines. Background Technology

[0002] The high-pressure compressor rotor of an aero-engine is the most complex component in the assembly of core aero-engine parts. The process is complicated, involving not only assembly but also various combined turning, milling, and grinding processes. Therefore, the rotor will inevitably undergo repeated transfers and fixture disassembly and assembly. This not only increases the quality risk of the high-pressure compressor rotor being damaged by bumps and scratches, but also greatly reduces the assembly efficiency of the high-pressure compressor rotor.

[0003] Currently, the assembly of high-pressure compressor rotors for aero engines involves several processes, including the assembly of the pre-drum, third-stage disc, first to ninth-stage blades, application of sealant to the tenon grooves of the first to third-stage discs, assembly of jigs before blade tip grinding, pre-assembly of the gear teeth, pre-assembly before applying carbide coating, final assembly of the fourth to ninth-stage blades, and assembly of locking pins. These processes require repeated hoisting and disassembly on a high-pressure compressor rotor transport vehicle, necessitating a large workforce, significant time commitment, and a high risk of injury from impacts and scratches, thus greatly extending the high-pressure compressor rotor assembly cycle. Furthermore, because the high-pressure rotor is a rotating body, workers need to move it back and forth during blade assembly, sealant application, and locking pin assembly, and the fixed fixtures are merely wooden blocks, resulting in a high safety risk.

[0004] High-pressure compressor rotors have complex shapes and a large number of blades, and repeated hoisting poses a high risk. Therefore, traditional assembly platforms and tooling are not only time-consuming and labor-intensive to build and assemble, but also pose high safety risks, low assembly efficiency, low assembly continuity, and low product quality consistency. Summary of the Invention

[0005] To address the numerous problems associated with traditional assembly tooling and routes, this invention aims to design a diversified assembly device and method for high-pressure compressor rotors of aero engines. The assembly device has multiple functions, including transportation, to facilitate assembly at each stage, achieve reliable assembly quality, convenient transportation, easy hoisting, and improved assembly efficiency.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A diversified assembly unit for high-pressure compressor rotors of aero-engines, including...

[0008] A vehicle chassis, wherein rollers are mounted on the lower end of the vehicle chassis;

[0009] The vehicle floor plate is fixedly connected to the upper end of the vehicle chassis, and a hollow operating area is formed between the lower end of the vehicle floor plate and the upper end of the vehicle chassis.

[0010] A turntable, which is rotatably connected to the vehicle floor via a thrust ball bearing;

[0011] A clamp is provided above the turntable and rotates synchronously with it.

[0012] Furthermore, the rollers include a pair of fixed rollers and a pair of moving rollers. The fixed rollers do not rotate or translate relative to the chassis, but only rotate around their own axes. The moving rollers can rotate relative to the chassis while rotating around their own axes, thereby enabling the chassis to steer.

[0013] Furthermore, a bearing housing is provided on the vehicle floor, the thrust ball bearing is assembled in the bearing housing, and the shaft ring of the thrust ball bearing is fitted with the bearing sleeve. A counterweight is installed on the upper end of the bearing sleeve, and the turntable is fixed on the counterweight.

[0014] Furthermore, a support column is provided on the counterweight block and located outside the turntable, the upper end of the support column is connected to the support plate, and a part of the clamp is fixed on the support plate.

[0015] Furthermore, the counterweight is also equipped with a hand-operated positioner, which includes a locking pin that moves up and down. The vehicle floor has a pin hole, and the pin hole is located on the path of the locking pin's up and down movement.

[0016] Furthermore, the surface of the clamp that contacts the rotor of the high-pressure compressor of the aero-engine is covered with a layer of flexible material.

[0017] Furthermore, a back panel is also connected to the vehicle floor, and the back panel is equipped with handlebars and a storage box.

[0018] Furthermore, an oil collection box is placed in the hollowed-out operating area.

[0019] A method for assembling a high-pressure compressor rotor for an aero-engine, employing the aforementioned diversified assembly device, and comprising:

[0020] To install the high-pressure compressor rotor, first open the clamps and hoist the high-pressure compressor rotor onto the turntable. The small end of the high-pressure compressor drum shaft should face down and contact the turntable. After installation, lock the clamps in place. The clamps should be secured at the step in the middle of the drum shaft.

[0021] Keep the drum shaft of the high-pressure compressor rotor in a fixed state, and carry out the assembly of the third-stage high-pressure compressor disc assembly, the assembly of the front drum assembly, the application of sealant to the tenon groove of the third-stage disc, the application of sealant to the tenon groove of the first and second stages, the assembly of blades, the deburring of blades and the grinding of locking pins.

[0022] The high-pressure compressor rotor is rotated by a turntable, and the following processes are carried out: applying glue to the tenon grooves of the first, second and third stage blades, selecting and assembling the fourth to ninth stage blades, removing burrs after grinding the blade tips, and grinding and installing the locking pins.

[0023] The rotor gear pre-assembly fixture, the carbide-coated pre-assembly fixture, and the blade pre-assembly fixture are installed in the hollowed-out operating area between the chassis and the frame.

[0024] The assembly method for high-pressure compressor rotors of aero engines also includes sending the high-pressure compressor rotor, which is already installed on the multi-assembly device, into a drying equipment for drying treatment of the high-pressure compressor rotor without disassembling it.

[0025] The existing assembly method uses a combination of wooden blocks, transfer vehicles, and slings to complete the assembly of the high-pressure air compressor. This requires back-and-forth hoisting, multiple people working together, high assembly risk, ineffective quality assurance, and low assembly efficiency.

[0026] Compared with the prior art, the assembly device and assembly method of the present invention have the following characteristics:

[0027] ① Diversified assembly, realizing integrated assembly of multiple processes;

[0028] ② To achieve the function of radial fixation and axial rotation of the high-pressure compressor rotor;

[0029] ③ Achieve integrated clamping function for horizontal machining fixtures of high-pressure compressor rotors;

[0030] ④ Achieve integrated transportation and assembly of high-pressure compressor rotor;

[0031] ⑤ The rotor blades and locking pins are assembled, and the tenon and groove sealant can be applied at specific points;

[0032] ⑥ The safety factor is greatly improved compared to traditional assembly methods;

[0033] ⑦ Reduce the number of hoisting and transfer operations between different processes;

[0034] ⑧. The assembly efficiency of the high-pressure compressor rotor has been greatly improved. Attached Figure Description

[0035] Figure 1 This is a front view of the multi-assembly device in this invention;

[0036] Figure 2 for Figure 1 The left view;

[0037] Figure 3 A three-dimensional view of a multi-functional assembly of a high-pressure compressor rotor;

[0038] In the diagram: 1. Vehicle underframe, 2. Back panel, 3. Oil collection box, 4. Vehicle floor plate, 5. Bearing seat, 6. Bearing sleeve, 7. Turntable, 8. Counterweight, 9. Clamp, 10. Support plate, 11. Support column, 12. Document box, 13. Acrylic box, 14. Wheel pad, 15. Handlebar, 16. Thrust ball bearing, 17. First bolt, 18. Second bolt, 19. Fixed wheel, 20. Moving wheel, 21. Hand-operated positioning device. Detailed Implementation

[0039] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. However, it should not be construed that the scope of the subject matter of the present invention is limited to the following embodiments. All modifications, substitutions and alterations made based on ordinary technical knowledge and common practices in the art without departing from the above-described technical concept of the present invention are included within the scope of the present invention.

[0040] like Figures 1-3 As shown, this is the multi-functional assembly device for the high-pressure compressor rotor of the aero-engine designed according to the present invention. It can also be regarded as a multi-functional transportation device. The assembly device mainly consists of a chassis 1, a back plate 2, an oil receiving box 3, a chassis plate 4, a bearing seat 5, a bearing sleeve 6, a turntable 7, a counterweight 8, a clamp 9, a support plate 10, a support column 11, a document box 12, an acrylic box 13, a wheel pad 14, a handle 15, a thrust ball bearing 16, a first bolt 17, a second bolt 18, a fixed wheel 19, a moving wheel 20, and a hand-operated positioning device 21.

[0041] The diversified assembly device is mainly based on the assembly vehicle body (vehicle floor 4) and the bearing lockable turntable 7. The high-pressure compressor rotor is placed in the clamp 9. The contact surface between the clamp 9 and the high-pressure compressor rotor is made of flexible and non-polluting contact material to fix the high-pressure compressor rotor and prevent tipping and contact scratches. The rotation of the turntable 7 is achieved by the cooperation of the bearing seat 5, the thrust ball bearing 16, the counterweight 8, and the bearing sleeve 6. The bearing seat 5, the counterweight 8, and the bearing sleeve 6 are all ring structures and are installed by combining the first bolt 17 and the second bolt 18. The bearing seat 5 is installed on the vehicle floor 4, the thrust ball bearing 16 is installed on the bearing seat 5, and part of the bearing sleeve 6 is installed in the inner hole of the shaft ring of the thrust ball bearing 16, while the other part is pressed against the end face of the shaft ring of the thrust ball bearing 16 to support the counterweight 8. The counterweight 8 is used to adjust the center of gravity position of the high-pressure compressor rotor when it rotates to ensure that it does not tip over. A support plate 10 is mounted on the counterweight 8 via multiple support columns 11. The non-moving part of the clamp 9 is fixed to the upper end of the support plate 10. The moving part of the clamp 9 rotates around the non-moving part, thereby opening and locking the clamp 9. The function of the high-pressure compressor rotor rotating around its axis is achieved by the turntable 7. The rotation of the high-pressure compressor rotor is stopped and started by manually controlling the locking pin (the hand-operated positioner 21 is fixed on the counterweight 8, and the locking pin can move up and down to insert or pull out the pin control on the chassis plate 4) through the hand-operated positioner 21. The fixture (a heavy mandrel-type fixture) for horizontal machining of the high-pressure compressor rotor is made possible by the hollow operating space of the chassis plate 4, which makes the installation and disassembly of the fixture more convenient and greatly improves the safety factor. An oil receiving box 3 is also placed in the hollow operating space. The software data of the high-pressure compressor rotor can be placed in the file box 12. Inside the acrylic box 13, the chassis 1 is designed as a trolley with fixed wheels 19 and moving wheels 20, enabling transportation between various assembly processes and providing integrated drying for the high-pressure compressor rotor. The chassis 1 is connected to the fixed wheels 19 and moving wheels 20 via wheel pads 14. The fixed wheels 19 can only rotate on their own axis, while the moving wheels 20 can rotate relative to the chassis 1, thus enabling the steering of the multi-functional assembly device. The chassis 1 and chassis plate 4 are constructed of steel plates to enhance the structural strength of the assembly device. The fixed wheels 19 and moving wheels 20 are made of high-temperature resistant materials to prevent damage to them during drying. A back plate 2 is also connected to the chassis plate 4 for mounting the handle 15 for pushing the multi-functional assembly device, as well as the document box and acrylic box 13.

[0042] During the assembly of the high-pressure compressor rotor, first open clamp 9 and use a lifting tool to hoist the high-pressure compressor rotor onto the turntable 7 on the vehicle floor 4, with the small end of the high-pressure compressor drum shaft facing downwards and contacting the turntable 7. After installation, lock clamp 9 in place, securing it at the middle step of the drum shaft. This solves the safety hazard caused by placing the high-pressure compressor rotor on a wooden block during traditional assembly, effectively preventing the risk of the wooden block aging or being knocked over by human error. Similarly, any assembly process requiring the drum shaft to be fixed in the middle can be performed on this multi-functional assembly device. Assembly of the third-stage high-pressure compressor disc assembly, assembly of the front drum assembly, application of sealant to the third-stage disc tenon groove, application of sealant to the first and second-stage tenon grooves, blade assembly, blade deburring, and grinding of locking pins can all be performed on this assembly device. The high-pressure compressor is fixed to the multi-functional assembly device and locked with clamp 9. The rotor of the high-pressure compressor can be rotated around the axis by the turntable 7. This enables some processes that require the rotor to rotate to be carried out better and to improve efficiency, such as applying glue to the tenon grooves of the first, second and third stage blades, selecting and assembling the fourth to ninth stage blades, removing burrs after grinding the blade tips, and grinding and installing the locking pins. After the high-pressure compressor has a self-rotating function on this device, the efficiency of these assembly processes will be greatly improved and the safety risks will be greatly reduced.

[0043] The chassis plate 1 of the multi-functional assembly unit is designed with a hollow structure in the middle, which allows for the installation and removal of machining and grinding fixtures, thereby reducing the number of times the high-pressure compressor rotor needs to be hoisted back and forth and shortening the assembly cycle. Therefore, the assembly fixtures for machining the high-pressure compressor rotor's teeth, the assembly fixtures for applying hard alloy, and the assembly fixtures for machining and grinding the blades can all be performed on the multi-functional assembly unit.

[0044] The multi-functional assembly unit is designed as a trolley structure, enabling high-safety transportation between various assembly stages. The wheels of the multi-functional assembly unit are steerable and made of high-temperature resistant material, allowing the high-pressure compressor rotor to be directly pushed to dry after being coated with adhesive, which is convenient, fast, and improves efficiency.

[0045] Contents not described in detail in this specification are prior art known to those skilled in the art. Although illustrative specific embodiments of the invention have been described above to facilitate understanding by those skilled in the art, it should be understood that the invention is not limited to the scope of the specific embodiments. Various modifications are readily apparent to those skilled in the art as long as they fall within the spirit and scope of the invention as defined and determined by the appended claims, and all inventions utilizing the concept of this invention are protected.

Claims

1. A method for assembling a high-pressure compressor rotor for an aero-engine, characterized in that: The assembly equipment used includes: The vehicle chassis (1) has rollers installed at its lower end; The vehicle floor plate (4) is fixedly connected to the upper end of the vehicle chassis (1), and a hollow operating area is formed between the lower end of the vehicle floor plate (4) and the upper end of the vehicle chassis (1); Turntable (7), which is rotatably connected to the vehicle floor (4) via a thrust ball bearing (16); Clamp (9), the clamp (9) is set above the turntable (7) and rotates synchronously with the turntable (7); Assembly methods include: To install the high-pressure compressor rotor, first open the clamp (9), then hoist the high-pressure compressor rotor onto the turntable (7), with the small end of the high-pressure compressor drum shaft facing down and in contact with the turntable (7). After installation, lock the clamp (9) in place, with the clamp (9) locked at the middle step of the drum shaft. Keep the drum shaft of the high-pressure compressor rotor in a fixed state, and carry out the assembly of the third-stage high-pressure compressor disc assembly, the assembly of the front drum assembly, the application of sealant to the tenon groove of the third-stage disc, the application of sealant to the tenon groove of the first and second stages, the assembly of blades, the deburring of blades and the grinding of locking pins. The high-pressure compressor rotor is driven to rotate by the turntable (7), and the following processes are carried out: applying glue to the tenon grooves of the first, second and third stage blades, selecting and assembling the fourth to ninth stage blades, removing burrs after grinding the blade tips, and grinding and installing the locking pins. The rotor gear pre-assembly fixture, the carbide-coated pre-assembly fixture, and the blade pre-assembly fixture are installed in the hollowed-out operating area between the chassis plate (4) and the chassis frame (1).

2. The assembly method for a high-pressure compressor rotor of an aero-engine according to claim 1, characterized in that: The rollers include a pair of fixed rollers (19) and a pair of moving rollers (20). The fixed rollers (19) do not rotate or translate relative to the chassis (1), but only rotate around their own axis. The moving rollers (20) can rotate relative to the chassis (1) while rotating around their own axis, thereby realizing the steering of the chassis (1).

3. The assembly method for a high-pressure compressor rotor of an aero-engine according to claim 1, characterized in that: The vehicle floor (4) is provided with a bearing seat (5), the thrust ball bearing (16) is assembled in the bearing seat (5), and the shaft ring of the thrust ball bearing (16) is matched with the bearing sleeve (6). A counterweight (8) is installed on the upper end of the bearing sleeve (6), and the turntable (7) is fixed on the counterweight (8).

4. The assembly method for a high-pressure compressor rotor of an aero-engine according to claim 3, characterized in that: A support column (11) is provided on the counterweight (8) and located outside the turntable (7). The upper end of the support column (11) is connected to the support plate (10). A part of the clamp (9) is fixed on the support plate (10).

5. The assembly method for a high-pressure compressor rotor of an aero-engine according to claim 3, characterized in that: The counterweight (8) is also provided with a hand-operated locator (21), which includes a locking pin that moves up and down. The vehicle floor plate (4) has a pin hole, and the pin hole is located on the path of the locking pin moving up and down.

6. The assembly method for a high-pressure compressor rotor of an aero-engine according to claim 1, characterized in that: The surface of the clamp (9) that contacts the rotor of the high-pressure compressor of the aero-engine is covered with a flexible material layer.

7. The assembly method for a high-pressure compressor rotor of an aero-engine according to claim 1, characterized in that: The vehicle floor (4) is also connected to a back plate (2), on which a handle (15) and a storage box are provided.

8. The assembly method of a high-pressure compressor rotor for an aero-engine according to claim 1, characterized in that: An oil collection box (3) is placed in the hollowed-out operating area.

9. The assembly method for a high-pressure compressor rotor of an aero-engine according to claim 1, characterized in that: This also includes sending the high-pressure compressor rotor, which is already installed on the multi-assembly unit, into a drying equipment for drying the high-pressure compressor rotor without disassembling it.

Images