Multifunctional scaled test bed for testing dynamic characteristics of rotor system shafting

Abstract

A multifunctional scaled test bed for testing the shafting dynamics characteristics of a rotor system belongs to the field of gas turbine dynamics testing, and comprises a test installation platform, a power device, a shaft coupling, a multi-plate pull rod rotor assembly structure, a sliding bearing and a supporting device, a thrust bearing and a supporting device, a sensor rack and a signal acquisition device. The multi-plate pull rod rotor assembly structure, the sliding bearing and the supporting device, the thrust bearing and the supporting device, the shaft coupling, the power device and the sensor rack are all installed on the test installation platform. The multi-plate pull rod rotor assembly structure, the sliding bearing and the supporting device, the thrust bearing and the supporting device, the shaft coupling and the power device are sequentially connected. The sensor rack is installed on the top of one side of the multi-plate pull rod rotor assembly structure. Sensors are installed on the sliding bearing and the supporting device, the thrust bearing and the supporting device and the sensor rack. The sensors are connected with the signal acquisition device. The dynamics characteristics of various types of gas turbines can be quickly and accurately tested and analyzed.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of gas turbine dynamics test, and particularly relates to a multifunctional scaled test bench for testing the shaft dynamics characteristics of a rotor system. BACKGROUND

[0002] Heavy-duty gas turbines play an irreplaceable role in the field of industrial power generation, and the corresponding experimental research is of great significance to perfecting rotor dynamics theory and improving the design level of gas turbines in China. The rotor structure of modern heavy-duty gas turbines mainly adopts a multi-disc assembly with pull rods or an integral welded structure design scheme, including a compressor section, a combustion chamber and a turbine section. The shaft structure is complex and huge. Due to safety, feasibility, economic cost and other factors, it is difficult to directly test and adjust the structure of the prototype machine during operation.

[0003] Different types of gas turbines have different dynamics characteristics. Even for different modified designs of the same type of machine, the dynamics characteristics will change greatly. If a scaled design and processing are only performed on a certain type of machine, there will inevitably be limitations in the research. Therefore, designing a shaft scaled test bench that can accurately reflect the dynamics characteristics of the gas turbine rotor is of great strategic significance to improving the design level of the gas turbine industry in China and realizing the self-design of the shaft structure of the gas turbine as soon as possible. SUMMARY

[0004] In order to solve the problems of response verification, fault analysis and structure optimization design of the shaft dynamics characteristics of heavy-duty gas turbines, the present application designs a multifunctional scaled test bench for verifying the shaft dynamics characteristics of gas turbines. The test bench can conveniently and quickly test and analyze the dynamic response of different types of gas turbine systems.

[0005] To achieve the above purpose, the technical scheme adopted by the present application is as follows:

[0006] A multifunctional scaled test bench for testing the shaft dynamics characteristics of a rotor system, comprising a test installation platform, a power device, a shaft coupling, a multi-disc pull rod rotor assembly structure, a sliding bearing and a supporting device, a thrust bearing and a supporting device, a sensor rack and a signal acquisition device. The multi-disc pull rod rotor assembly structure, the sliding bearing and the supporting device, the thrust bearing and the supporting device, the shaft coupling, the power device and the sensor rack are all installed on the test installation platform. The multi-disc pull rod rotor assembly structure, the sliding bearing and the supporting device, the thrust bearing and the supporting device, the shaft coupling and the power device are sequentially connected. The sensor rack is installed on the upper side of the multi-disc pull rod rotor assembly structure. Sensors are installed on the sliding bearing and the supporting device, the thrust bearing and the supporting device and the sensor rack. The sensors are connected with the signal acquisition device.

[0007] The multi-disc pull rod rotor assembly structure body adopts a modular design and is divided into a compressor section end shaft, a wheel disc, an intermediate transition shaft, a turbine section end shaft and a pre-tightening bolt.

[0008] The sliding bearing and support device is composed of a sliding bearing upper seat, a sliding bearing base, a sliding bearing, a sliding bearing baffle and a lifting ring screw.

[0009] The thrust bearing and support device is mainly composed of a thrust bearing baffle, a thrust bearing baffle ring, a four-point thrust bearing and a thrust bearing base.

[0010] The coupling is used for transmitting torque and is connected to the turbine section end shaft of the multi-disc pull rod rotor assembly structure and the output shaft of the power device through keys.

[0011] The power device is composed of a motor gland, a motor support and a high-pressure rotor electric spindle.

[0012] The sensor frame is mainly used for non-contact measurement of radial vibration during operation of the multi-disc pull rod rotor assembly structure.

[0013] The test installation platform is composed of a main base, a protective cover sliding rail and a protective cover.

[0014] The sensor frame moves axially along the assembly positioning groove on the test installation platform to measure the vibration of the shaft, the disc and the coupling at different positions.

[0015] After the above technical scheme is adopted, the present application has the following advantages:

[0016] 1. The multi-disc pull rod rotor adopts a modular design structure, which facilitates the rapid design of different gas turbine circumferential pull rod rotor structures, and effectively reduces the processing difficulty and experimental cost.

[0017] 2. Each disc is assembled by pull rods or bolts, and the design of the pin hole and the mouth structure on each disc effectively ensures the assembly accuracy.

[0018] 3. The test bench can be used for response testing, pull rod mistuning fault analysis, unbalance fault analysis, oil film vortex phenomenon testing, and structure optimization design of different types of gas turbine units. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 Figure 1 is a structural schematic diagram of a multifunctional scaled test bench for testing the dynamic characteristics of a gas turbine shaft system according to an embodiment;

[0020] Figure 2 Figure 1 is a structural schematic diagram of a multifunctional scaled test bench for testing the dynamic characteristics of a gas turbine shaft system according to an embodiment;

[0021] Figure 3 Figure 1 is a structural schematic diagram of a multifunctional scaled test bench for testing the dynamic characteristics of a gas turbine shaft system according to an embodiment;

[0022] Figure 4 Figure 1 is a structural schematic diagram of a multifunctional scaled test bench for testing the dynamic characteristics of a gas turbine shaft system according to an embodiment; Figure 1 Figure 2

[0023] Figure 5 Figure 1 is a structural schematic diagram of a multifunctional scaled test bench for testing the dynamic characteristics of a gas turbine shaft system according to an embodiment;

[0024] Figure 6 Figure 1 is a structural schematic diagram of a multifunctional scaled test bench for testing the dynamic characteristics of a gas turbine shaft system according to an embodiment;

[0025] Figure 7 Figure 1 is a structural schematic diagram of a multifunctional scaled test bench for testing the dynamic characteristics of a gas turbine shaft system according to an embodiment;

[0026] Figure 8 Figure 1 is a structural schematic diagram of a multifunctional scaled test bench for testing the dynamic characteristics of a gas turbine shaft system according to an embodiment;

[0027] Figure 9 Figure 1 is a structural schematic diagram of a multifunctional scaled test bench for testing the dynamic characteristics of a gas turbine shaft system according to an embodiment;

[0028] The parts in the figure are respectively:

[0029] ​​1 - Multi-disc pull rod rotor assembly structure; 1-1 - Compressor section end shaft; 1-2 - Disc; 1-2-1 - Pull rod through hole; 1-2-2 - Disc positioning pin hole; 1-2-3 - Unbalance amount adjusting hole; 1-2-4 - Disc assembly protrusion; 1-2-5 - Disc assembly recess; 1-3 - Intermediate transition shaft; 1-4 - Turbine section end shaft; 1-5 - Pre-tightening bolt; 1-6 - Circumferential pull rod; 2 - Sliding bearing and support device; 2-1 - Lifting ring screw; 2-2 - Ventilation cap; 2-3 - Sliding bearing upper seat; 2-4 - Sliding bearing base; 2-5 - Sliding bearing; 2-6 - Sliding bearing baffle; 2-7 - Sliding bearing assembly positioning groove; 3 - Thrust bearing and support device; 3-1 - Oil way joint; 3-2 - Assembly counterbore; 3-3 - Thrust bearing baffle; 3-4 - Thrust bearing baffle ring; 3-5 - Locking nut; 3-6 - Four-point thrust bearing; 3-7 - Thrust bearing base; 3-8 - Thrust bearing assembly positioning groove; 4 - Coupling; 5 - Power device; 5-1 - Motor gland; 5-2 - High-pressure rotor electric spindle; 5-3 - Motor support; 5-4 - Motor seat assembly positioning groove; 6 - Sensor rack; 6-1 - Sensor rack crossbeam; 6-2 - Sensor mounting hole; 7 - Test installation platform; 7-1 - Main base; 7-2 - Device mounting hole; 7-3 - Assembly positioning groove; 7-4 - Protective cover sliding rail; 7-5 - Protective cover; 7-6 - Base oil return groove. DETAILED DESCRIPTION

[0030] A multifunctional scaled test bench for testing the shafting dynamics characteristics of a rotor system, comprising a test installation platform 7, a power device 5, a coupling 4, a multi-disc pull rod rotor assembly structure 1, a sliding bearing and support device 2, a thrust bearing and support device 3, a sensor rack 6 and a signal acquisition device, the multi-disc pull rod rotor assembly structure 1, the sliding bearing and support device 2, the thrust bearing and support device 3, the coupling 4, the power device 5 and the sensor rack 6 are all installed on the test installation platform 7, the multi-disc pull rod rotor assembly structure 1, the sliding bearing and support device 2, the thrust bearing and support device 3, the coupling 4 and the power device 5 are sequentially connected, the sensor rack 6 is installed on the upper side of the multi-disc pull rod rotor assembly structure 1, sensors are installed on the sliding bearing and support device 2, the thrust bearing and support device 3 and the sensor rack 6, and the sensors are connected with the signal acquisition device. The components and devices have unified installation and positioning interfaces, and can be replaced or adjusted according to the actual design structure.

[0031] The multi-disc pull rod rotor assembly structure 1 body adopts modular design, and is divided into a compressor section end shaft 1-1, a disc 1-2, an intermediate transition shaft 1-3, a turbine section end shaft 1-4 and a pre-tightening bolt 1-5. The compressor section end shaft 1-1, the disc 1-2, the intermediate transition shaft 1-3, the pre-tightening bolt 1-5 and the turbine section end shaft 1-4 are sequentially connected, and the turbine section end shaft 1-4 is provided with sliding bearings and a supporting device 2. Threads and splines are machined on the end shaft, which are used for assembling with axial thrust bearings and transmitting power torque, respectively. Assembly holes, shape-position pin holes and unbalance amount adjusting holes are arranged in the circumferential direction of each disc, and each disc is assembled together through the assembly holes by using a pull rod or a bolt connection structure. The two end faces of each disc are designed to have a stop structure, so as to facilitate the convenience of rotor structure installation and the maintenance of assembly body radial precision. The shape-position pin holes function to ensure the installation precision between the discs and bear the tangential load. Twenty-four unbalance amount adjusting holes are uniformly arranged in the circumferential direction of each disc, and the angle between each hole is 15°. The shaft system unbalance amount can be added according to the requirement. The multi-disc pull rod rotor body can realize the scaled-down design of shaft systems of various types of gas turbines by replacing or adjusting the disc structure, quantity and position.

[0032] The sliding bearing and supporting device 2 is composed of a sliding bearing upper seat 2-3, a sliding bearing base 2-4, a sliding bearing 2-5, a sliding bearing baffle 2-6 and a lifting ring screw 2-1. The upper part and the lower part of the sliding bearing 2-5 are respectively provided with the sliding bearing upper seat 2-3 and the sliding bearing base 2-4. The top of the sliding bearing upper seat 2-3 is provided with the lifting ring screw 2-1 and a vent cap 2-2, and the bottom of the sliding bearing base 2-4 is provided with a sliding bearing assembly positioning groove 2-7. The two side faces of the sliding bearing 2-5 are respectively provided with the sliding bearing baffle 2-6. The sliding bearing upper seat and the sliding bearing base are cast by cast iron. According to the structure size of the sliding bearing, an oil supply and return pipeline is designed. The upper part of the bearing upper seat is provided with a lifting ring for facilitating disassembly and assembly. The sliding bearing upper seat and the sliding bearing base are connected by a bolt structure, and the relative position is ensured by a pin hole. The bearing base is positioned by a T-shaped block and connected and assembled by a fastening bolt with an experimental platform.

[0033] The thrust bearing and support device 3 is mainly composed of a thrust bearing baffle 3-3, a thrust bearing retainer 3-4, a four-point thrust bearing 3-6 and a thrust bearing base 3-7. The outer ring of the four-point thrust bearing 3-6 is connected with the thrust bearing base 3-7 through the thrust bearing baffle 3-3, and the thrust bearing retainer 3-4 is arranged between the four-point thrust bearing 3-6 and the thrust bearing baffle 3-3. The thrust bearing baffle 3-3 is connected with the thrust bearing base 3-7 through a locking nut 3-5. The oil joint 3-1 and the assembly counterbore 3-2 are arranged on the upper part of the thrust bearing base 3-7, and the thrust bearing assembly positioning groove 3-8 is arranged on the bottom of the thrust bearing base 3-7. The thrust bearing base is made of cast iron, and the thrust bearing baffle and the thrust bearing retainer are made of 45 steel. One side of the inner ring of the four-point thrust bearing is matched with the shaft shoulder of the multi-disc rotor end shaft, and the other side of the inner ring is fixed through the thread cooperation of the shrink nut and the multi-disc rotor end shaft. The outer ring of the four-point thrust bearing is assembled and fixed through the baffle and the bearing base. The above structure prevents the axial movement of the multi-disc rotor during operation.

[0034] The coupling 4 is used for transmitting torque, and the coupling 4 is connected with the turbine section end shaft 1-4 of the multi-disc pull rod rotor assembly structure 1 and the output shaft of the power device 5 through keys.

[0035] The power device 5 is composed of a motor gland 5-1, a motor support 5-3 and a high-pressure rotor electric spindle 5-2. The motor gland 5-1 and the motor support 5-3 are arranged on the upper part and the lower part of the high-pressure rotor electric spindle 5-2 respectively, and the motor seat assembly positioning groove 5-4 is arranged on the bottom of the motor support 5-3. The motor gland and the motor support are made of cast iron, and the structure is designed according to the structure size and the axial height of the high-pressure rotor electric spindle. In order to reduce the weight, the upper part of the motor gland is designed with a chamfer and other lightweight designs. The motor gland and the motor support, and the motor support and the experimental installation platform are connected through bolts.

[0036] The sensor rack 6 is mainly used for non-contact measurement of the radial vibration amount of the multi-disc pull rod rotor assembly structure 1 during operation. The sensor rack 6 is made of 45 steel, and sensor mounting holes 6-2 are reserved at 0°, 45°, 90°, 135° and 180° directions.

[0037] The test installation platform 7 is composed of a main base 7-1, a shield sliding rail 7-4 and a shield 7-5, the main base 7-1 is provided with the shield sliding rail 7-4, the shield sliding rail 7-4 is slidably connected with the shield 7-5, the main base 7-1 is provided with a device installation hole 7-2, three assembly positioning grooves 7-3 and a base oil return groove 7-6, and the number of the assembly positioning grooves 7-3 is three. The main base is made of cast iron, and the shield is made of 45 steel. The main base is used for mounting and bearing various experimental components, and the base is provided with three assembly positioning grooves for mounting and positioning the sliding bearing base, the four-point bearing base, the motor base and the sensor rack. During assembly, the positioning is achieved through key type positioning blocks, and the connection is achieved through bolts. The base oil return groove is arranged above the main base, and is used for collecting and cooling the lubricating oil of the sliding bearing pressure oil and the rotating components.

[0038] The sensor rack 6 moves along the assembly positioning groove 7-3 on the test installation platform 7 in the axial direction, so as to measure the vibration amount of the shaft, the disc and the coupling at different positions.

[0039] Embodiment one

[0040] The present application is described in conjunction with the accompanying drawings, and various aspects of the present application are described in the present disclosure with reference to the accompanying drawings, in which many embodiments are shown. The embodiments of the present disclosure are not necessarily intended to include all aspects of the present application. It should be understood that the various concepts and embodiments introduced above, as well as those described in more detail below, can be improved and adjusted without departing from the concept of the present application, and these all belong to the protection scope of the present application.

[0041] With reference to Figure 1 , Figure 2 , the present application provides a multifunctional scaled-down test bench for testing the shafting dynamic characteristics of a rotor system, the test bench comprises a multi-disc pull rod rotor 1, a sliding bearing and supporting device 2, a thrust bearing and supporting device 3, a coupling 4, a power device 5, a sensor rack 6, a test installation platform 7 and a shield 7-5. The sliding bearing and supporting device 2, the thrust bearing and supporting device 3, the power device 5 and the sensor rack 6 are positioned through key type positioning blocks and assembly positioning grooves 7-3, and are connected with the test installation platform 7 through bolts. Each supporting device can move in the axial direction, and is used for adjusting the supporting span of different scaled-down rotor models. The high-pressure rotor electric spindle 5-2 is connected with the multi-disc pull rod rotor through the coupling 4, and is used for transmitting power torque.

[0042] With reference to Figure 3 , Figure 4The multi-disc pull rod rotor 1 comprises a compressor section end shaft 1-1, a wheel disc 1-2, an intermediate transition shaft 1-3, a turbine section end shaft 1-4, a pre-tightening bolt 1-5 and a circumferential pull rod 1-6. The wheel disc 1-2 comprises a pull rod through hole 1-2-1, a wheel disc positioning pin hole 1-2-2, an unbalance amount adjusting hole 1-2-3, a wheel disc assembly protrusion 1-2-4 and a wheel disc assembly recess 1-2-5. The multi-disc pull rod rotor structure body adopts a modular design, the unbalance amount adjusting holes are arranged in the circumferential direction of each disc, the stop opening assembly mode is adopted, during assembly of each wheel disc, the assembly protrusion 1-2-4 of a previous wheel disc is matched with the assembly recess 1-2-5 of a subsequent wheel disc, a pin shaft is passed through the wheel disc positioning pin holes 1-2-2 of two adjacent wheel discs, and finally the circumferential pull rod 1-6 is passed through the pull rod through hole 1-2-1 and the pre-tightening bolt 1-5 is tightened with a certain amount of pre-tightening force, so that the assembly of the multi-disc pull rod rotor structure is completed. By replacing and adjusting the positions and structures of the wheel discs, the scaled-down design of shaft systems of various types of gas turbines can be realized.

[0043] Referring to Figure 5 The sliding bearing and support device 2 comprises a lifting ring screw 2-1, a vent cap 2-2, a sliding bearing upper seat 2-3, a sliding bearing base 2-4, a sliding bearing 2-5, a sliding bearing baffle 2-6 and a sliding bearing assembly positioning groove 2-7. The lifting ring screw 2-1 is used for lifting and replacing the sliding bearing and support device, the vent cap 2-2 is used for adjusting the pressure oil working condition, the sliding bearing upper seat 2-3 and the sliding bearing base 2-4 are connected through bolts, the sliding bearing 2-5 is coaxially installed with the sliding bearing baffle 2-6, the entire sliding bearing and support device 2 is matched with the assembly positioning groove 7-3 of the test installation platform through the sliding bearing assembly positioning groove 2-7, and the assembly of the sliding bearing and support device 2 with the test installation platform 7 is realized through bolts.

[0044] Referring to Figure 6 The thrust bearing and support device 3 comprises an oil way joint 3-1, an assembly counterbore 3-2, a thrust bearing baffle 3-3, a thrust bearing retainer 3-4, a locking nut 3-5, a four-point thrust bearing 3-6, a thrust bearing base 3-7 and a thrust bearing assembly positioning groove 3-8. One side inner ring of the four-point thrust bearing 3-6 is matched with the shaft shoulder of the multi-disc rotor turbine section end shaft 1-4, the other side inner ring is fixed through the locking nut 3-5 and the thread of the multi-disc rotor turbine section end shaft 1-4, the outer ring of the four-point thrust bearing 3-6 is assembled and fixed through the baffle 3-3 and the thrust bearing base 3-7, and the above structure prevents axial movement of the multi-disc rotor during operation.

[0045] Referring to Figure 7The power device 5 includes a motor gland 5-1, a high-pressure rotor electric main shaft 5-2, a motor support 5-3, and a motor seat assembly positioning groove 5-4. The motor gland 5-1, the high-pressure rotor electric main shaft 5-2, and the motor support 5-3 are connected by bolts, and the entire power device 5 is assembled and positioned with the assembly positioning groove 7-3 of the test installation platform through the motor seat assembly positioning groove 5-4, and is assembled with the test installation platform 7 by using bolts.

[0046] Referring to Figure 8 The sensor rack 6 is provided with sensor mounting holes in the directions of 0°, 45°, 90°, 135°, and 180°. The sensor rack 6 can be axially moved along the T-shaped groove on the test installation platform to measure the vibration amounts of shafts, discs, and couplings at different positions.

[0047] Referring to Figure 9 The test installation platform 7 includes a main base 7-1, a device mounting hole 7-2, an assembly positioning groove 7-3, a protective cover sliding rail 7-4, a protective cover 7-5, and a base oil return groove 7-6. The test installation platform 7 is provided with three assembly positioning grooves 7-3 for positioning and fixing the experimental device, and the assembly positioning grooves can meet the needs of module expansion in the later period. The main base 7-1 is provided with threaded holes on the surface for the installation of special experimental devices. The protective cover 7-5 can be axially slid along the protective cover sliding rail 7-4, and is moved to the disc during rotor testing and is fixed by a locking device. The oil return groove 7-6 is used for cooling and collecting the backflow of pressure oil and lubricating oil.

[0048] In summary, the multifunctional scaled-down test bench for testing the dynamic characteristics of a rotor system shafting has a modular design structure for the multi-disc pull rod rotor, which facilitates the rapid design of the structures of different gas turbine circumferential pull rod rotors, effectively reduces the processing difficulty and experimental cost, and effectively guarantees the assembly precision through the design of pin holes and stopper structures on each disc. The test bench can be used for response testing of different types of gas turbine units, pull rod mistuning fault analysis, unbalance fault analysis, oil film vortex phenomenon testing, and structure optimization design.

Claims

1. A multifunctional scaled test bench for testing the shafting dynamics characteristics of a rotor system, characterized in that: It includes test installation platform (7), power device (5), shaft coupling (4), multi-disc pull rod rotor assembly structure (1), sliding bearing and supporting device (2), thrust bearing and supporting device (3), sensor rack (6) and signal acquisition device, the multi-disc pull rod rotor assembly structure (1), sliding bearing and supporting device (2), thrust bearing and supporting device (3), shaft coupling (4), power device (5) and sensor rack (6) are all installed on the test installation platform (7), the multi-disc pull rod rotor assembly structure (1), sliding bearing and supporting device (2), thrust bearing and supporting device (3), shaft coupling (4) and power device (5) are sequentially connected, the sensor rack (6) is installed on the one side of the multi-disc pull rod rotor assembly structure (1) top, the sliding bearing and supporting device (2), thrust bearing and supporting device (3) and sensor rack (6) are all installed with sensor, the sensor is connected with signal acquisition device; The multi-disc pull rod rotor assembly structure (1) body adopts modular design, and is divided into compressor section end shaft (1-1), wheel disc (1-2), intermediate transition shaft (1-3), turbine section end shaft (1-4) and pre-tightening bolt (1-5) as a whole, and the turbine section end shaft (1-4) is provided with sliding bearing and supporting device (2); The sliding bearing and supporting device (2) is composed of sliding bearing upper seat (2-3), sliding bearing base (2-4), sliding bearing (2-5), sliding bearing baffle (2-6) and lifting ring screw (2-1), and the sliding bearing base (2-4) is provided with sliding bearing assembly positioning groove (2-7) in the bottom; The thrust bearing and supporting device (3) is mainly composed of thrust bearing baffle (3-3), thrust bearing baffle ring (3-4), four-point thrust bearing (3-6) and thrust bearing base (3-7), the upper part of the thrust bearing base (3-7) is provided with oil way joint (3-1) and assembly counterbore (3-2), and the bottom of the thrust bearing base (3-7) is provided with thrust bearing assembly positioning groove (3-8); The sensor rack (6) is used for non-contact measurement of radial vibration amount of the multi-disc pull rod rotor assembly structure (1) in the running process, is machined from 45 steel, and sensor mounting holes (6-2) are reserved in the 0°, 45°, 90°, 135° and 180° directions of the sensor rack (6).

2. The multifunctional scaled test bench for testing the shafting dynamics characteristics of a rotor system according to claim 1, characterized in that: The compressor section end shaft (1-1), wheel disc (1-2), intermediate transition shaft (1-3), pre-tightening bolt (1-5) and turbine section end shaft (1-4) are sequentially connected.

3. The multifunctional scaled test bench for testing the shafting dynamics characteristics of a rotor system according to claim 1, characterized in that: The upper part and the lower part of the sliding bearing (2-5) are respectively provided with sliding bearing upper seat (2-3) and sliding bearing base (2-4), the top of the sliding bearing upper seat (2-3) is provided with lifting ring screw (2-1) and air cap (2-2); the two side faces of the sliding bearing (2-5) are respectively provided with sliding bearing baffle (2-6).

4. The multifunctional scaled test bench for testing the shafting dynamics characteristics of a rotor system according to claim 1, characterized in that: The outer ring of the four-point thrust bearing (3-6) is connected with the thrust bearing base (3-7) through the thrust bearing baffle (3-3), and the four-point thrust bearing (3-6) is provided with a thrust bearing baffle (3-4) between the thrust bearing baffle (3-3), and the thrust bearing baffle (3-3) is connected with the thrust bearing base (3-7) through the locking nut (3-5).

5. The multifunctional scaled test bench for testing the shafting dynamics characteristics of a rotor system according to claim 1, characterized in that: The coupling (4) is used for transmitting torque, and the coupling (4) is connected with the turbine section end shaft (1-4) of the multi-disc pull rod rotor assembly structure (1) and the output shaft of the power device (5) through keys.

6. The multifunctional scaled test bench for testing the shafting dynamics characteristics of a rotor system according to claim 1, characterized in that: The power device (5) is composed of a motor gland (5-1), a motor support (5-3) and a high-pressure rotor electric spindle (5-2), the upper and lower parts of the high-pressure rotor electric spindle (5-2) are respectively provided with the motor gland (5-1) and the motor support (5-3), and the bottom of the motor support (5-3) is provided with a motor seat assembly positioning groove (5-4).

7. The multifunctional scaled test bench for testing the shafting dynamics characteristics of a rotor system according to claim 1, characterized in that: The test installation platform (7) is composed of a main base (7-1), a protective cover sliding rail (7-4) and a protective cover (7-5), the main base (7-1) is provided with the protective cover sliding rail (7-4), the protective cover sliding rail (7-4) is slidably connected with the protective cover (7-5), the main base (7-1) is provided with device mounting holes (7-2), assembly positioning grooves (7-3) and base oil return grooves (7-6), and the number of the assembly positioning grooves (7-3) is three.

8. The multifunctional scaled test bench for testing the shafting dynamics characteristics of a rotor system according to claim 1 or 7, characterized in that: The sensor frame (6) moves axially along the assembly positioning grooves (7-3) on the test installation platform (7) to measure the vibration amount of the shaft, the disc and the coupling at different positions.

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