A double rotor test bench device

Abstract

The present invention discloses a dual-rotor test bench device, which belongs to the technical field of gas turbines and aeroengines, and includes an optical platform and a drive system, a dual-rotor system, a control system and a test system; the optical platform includes an optical platform table and vibration isolation legs; the drive system includes a first drive unit and a second drive unit; the dual-rotor system includes a low-pressure rotor connected to the first drive unit through a spring coupling and a high-pressure rotor connected to the second drive unit through a drive assembly, and the axis of the low-pressure rotor and the high-pressure rotor are arranged on the same horizontal line; the control system includes a trio motion controller; the test system includes a displacement sensor and a sensor base for fixing the displacement sensor. The present invention adopts a dual-rotor test bench device of the above structure, which has a scientific structure, simple process, few workpieces, light weight and low cost, high speed, and is easy to promote, and can be used to carry out experiments such as the dynamic characteristics of the dual-rotor system.

Description

Technical Field

[0001] The invention relates to the technical field of gas turbines and aeroengines, and in particular to a dual-rotor test bench device. Background Art

[0002] Aircraft engines are known as the heart of aviation equipment and are one of the important elements that determine the performance, reliability and economy of aviation equipment. Among them, gas turbines have become a more common aircraft engine. The basic reason for this phenomenon is mainly because gas turbines are lighter than internal combustion engines under the same conditions of use, which enables aircraft to have faster flight speeds and higher flight altitudes.

[0003] The dual-rotor structure is the most common one, and the relevant experimental research on this structure has become one of the important research contents in this field. In the experimental research, the cost of using actual engines for experiments is high and there are also great risks, so many experimental studies are carried out using rotor test benches.

[0004] Nowadays, an intermediate bearing is provided between the inner and outer rotors of the test bench involved in the prior art, and the intermediate bearing can play a supporting and connecting role. However, in order to meet different test functions, there are very few test benches that can change the structure of the test bench conveniently and quickly. At the same time, in the dual-rotor system, the outer rotor shaft cannot be directly driven by the motor. Therefore, how to better meet the requirements of transmitting speed but not force to the outer rotor shaft has also become a difficult problem. Summary of the invention

[0005] The purpose of the present invention is to provide a dual-rotor test bench device to solve the problems existing in the above-mentioned background technology.

[0006] To achieve the above object, the present invention provides a dual-rotor test bench device, comprising an optical platform and a drive system, a dual-rotor system, a control system and a test system arranged above the optical platform;

[0007] The optical platform includes an optical platform table and vibration isolation legs arranged under the optical platform table. The optical platform table is an important part of the vibration isolation system. Its function is to provide a rigid platform without relative deformation. When a vibration source is transmitted to the table, the honeycomb structure and damping of the table can effectively reduce the vibration deformation of the optical platform. In addition to support, the main function of the vibration isolation legs is to isolate the vibration from the ground.

[0008] The driving system includes a first driving unit and a second driving unit, the first driving unit and the second driving unit are connected to the optical platform table through a first base and a second base respectively, and the first base and the second base are used to fix and adjust the position of the driving unit;

[0009] The dual rotor system includes a low-pressure rotor connected to a first drive unit through a spring coupling and a high-pressure rotor connected to a second drive unit through a drive assembly, and the axes of the low-pressure rotor and the high-pressure rotor are arranged on the same horizontal line;

[0010] The control system includes the trio motion controller, which sends control signals to the drive controller in the form of pulses and directions, and the drive controller provides rotational energy power to the drive motor;

[0011] The test system includes a displacement sensor and a sensor base for fixing the displacement sensor, and is mainly used to monitor the vibration displacement of the bearings, wheels and shafts with longer spans used in the test bench device.

[0012] Preferably, the low-pressure rotor and the high-pressure rotor are connected via an intermediate bearing or a double squirrel cage structure.

[0013] Preferably, the low-pressure rotor includes a low-pressure rotor shaft and a first bearing, a second bearing and a fifth bearing arranged on the low-pressure rotor shaft, the first bearing, the second bearing and the fifth bearing are connected to the optical platform table through a first bearing support, a second bearing support and a fifth bearing support, respectively; a low-pressure compressor wheel and a low-pressure turbine wheel are also arranged on the low-pressure rotor shaft.

[0014] Preferably, the high-pressure rotor includes a high-pressure rotor shaft and a third bearing and a fourth bearing arranged on the high-pressure rotor shaft, the third bearing is connected to the optical platform table top via a third bearing support, a fourth bearing disc is arranged on the fourth bearing, and a high-pressure compressor wheel and a high-pressure turbine wheel are also arranged on the high-pressure rotor shaft, and the low-pressure compressor wheel and the low-pressure turbine wheel, and the high-pressure compressor wheel and the high-pressure turbine wheel are fixedly connected to the low-pressure rotor shaft and the high-pressure rotor shaft respectively through a locking structure.

[0015] Preferably, the drive assembly includes a drive shaft, a drive shaft lifting lug, a support bearing and a drive shaft support, two support bearings are provided, the drive shaft is connected to the drive shaft support via the two support bearings, and the drive shaft lifting lug is provided on the drive shaft.

[0016] Preferably, one end of the second driving unit is connected to a driving main bevel gear, one side of the driving main bevel gear is meshingly connected to a driving slave bevel gear, and the driving slave bevel gear is connected to the input end of the driving shaft.

[0017] Preferably, the output end of the drive shaft and the input end of the high-pressure rotor shaft are both provided with four drive shaft lifting ears, and the drive shaft and the high-pressure rotor shaft are connected by means of the drive shaft lifting ears using fishing line or kite line to achieve speed transmission without force transmission to the high-pressure rotor.

[0018] Preferably, the first bearing and the third bearing are ball bearings, the second bearing, the fourth bearing and the fifth bearing are roller bearings, and the first bearing and the first bearing support, the second bearing and the second bearing support, the third bearing and the third bearing support, the fourth bearing and the fourth bearing disk, and the fifth bearing and the fifth bearing support are all connected by bolts.

[0019] Preferably, the double squirrel cage structure includes a first squirrel cage structure and a second squirrel cage structure, the first squirrel cage structure is composed of a second bearing support and a third bearing support connected to a first solid thin rod by bolt two; the second squirrel cage structure is composed of a fourth bearing disc and a fifth bearing support connected to a second solid thin rod by bolt three.

[0020] Preferably, the intermediate bearing is configured as a roller bearing.

[0021] Therefore, the present invention adopts a dual-rotor test bench device with the above structure, which has the following beneficial effects:

[0022] (1) Through the rapid replacement of parts, the construction of a dual-rotor test bench with intermediate bearings and a double-cage structure test bench can be realized conveniently and quickly;

[0023] (2) The optical platform table is an important part of the vibration isolation system. Its main function is to provide a platform without relative deformation. When a vibration source is transmitted to the optical platform table, its honeycomb structure and damping can effectively reduce the vibration deformation of the optical platform. In addition to the supporting function, the vibration isolation legs can also isolate the vibration from the ground.

[0024] (3) The lifting lug of the driving shaft is connected to the lifting lug of the high-pressure rotor input end by means of a fishing line, a kite line, etc., so as to better meet the requirement of transmitting speed without transmitting force for the high-pressure rotor shaft drive.

[0025] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of the dual-rotor test bench of the present invention;

[0027] Figure 2 A top view of the dual-rotor test bench of the present invention;

[0028] Figure 3 This is a schematic diagram of the structure of Embodiment 1 of the present invention;

[0029] Figure 4 This is a schematic diagram of the structure of Embodiment 2 of the present invention;

[0030] Figure 5 It is a schematic diagram of the low-pressure rotor structure of the present invention;

[0031] Figure 6 This is a schematic diagram of the high-pressure rotor structure of the present invention;

[0032] Figure 7 This is a schematic diagram of the first squirrel cage structure of the present invention;

[0033] Figure 8 A schematic diagram of the structure of the second squirrel cage is provided for the invention;

[0034] Reference numerals

[0035] 1. Optical platform table; 2. First drive unit; 3. Second drive unit; 4. First base; 5. Second base; 6. Shrapnel coupling; 7. Low-pressure rotor; 8. High-pressure rotor; 9. First bearing support; 10. Second bearing support; 11. Third bearing support; 12. Fourth bearing disc; 13. Fifth bearing support; 14. Drive assembly; 15. Low-pressure compressor wheel; 16. High-pressure compressor wheel; 17. Low-pressure turbine wheel; 18. High-pressure turbine wheel; 19. Intermediate bearing; 20. Drive main bevel gear; 21. Drive slave bevel gear. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0037] like Figure 1-2 As shown, a dual-rotor test bench device includes an optical platform and a drive system, a dual-rotor system, a control system and a test system arranged above the optical platform;

[0038] The optical platform includes an optical platform table top 1 and a vibration isolation leg arranged below the optical platform table top 1, and the main function is to provide a horizontal and stable table top with a vibration isolation effect;

[0039] The driving system includes a first driving unit 2 and a second driving unit 3, which are connected to the optical platform table 1 through a first base 4 and a second base 5 respectively. The first base 4 and the second base 5 are used to fix and adjust the position of the driving unit, specifically two sets of high-speed spindle drive motors and inverters, which drive the low-pressure rotor 7 and the high-pressure rotor 8 respectively;

[0040] The dual rotor system includes a low-pressure rotor 7 connected to the first drive unit 2 through a spring coupling 6 and a high-pressure rotor 8 connected to the second drive unit 3 through a drive assembly 14, and the axes of the low-pressure rotor 7 and the high-pressure rotor 8 are arranged on the same horizontal line;

[0041] The control system mainly includes the motion control card and its associated components;

[0042] The test system mainly includes a multi-channel high-speed data acquisition card and several eddy current sensors and acceleration sensors.

[0043] like Figure 5-6 As shown, the low-pressure rotor 7 includes a low-pressure rotor shaft and a first bearing, a second bearing and a fifth bearing arranged on the low-pressure rotor shaft. The first bearing, the second bearing and the fifth bearing are connected to the optical platform table 1 through a first bearing support 9, a second bearing support 10 and a fifth bearing support 13 respectively; a low-pressure compressor wheel 15 and a low-pressure turbine wheel 17 are also arranged on the low-pressure rotor shaft.

[0044] The high-pressure rotor 8 includes a high-pressure rotor shaft and a third bearing and a fourth bearing arranged on the high-pressure rotor shaft. The third bearing is connected to the optical platform table 1 through a third bearing support 11. A fourth bearing disc 12 is arranged on the fourth bearing. A high-pressure compressor wheel 16 and a high-pressure turbine wheel 18 are also arranged on the high-pressure rotor shaft. The low-pressure compressor wheel 15 and the low-pressure turbine wheel 17, and the high-pressure compressor wheel 16 and the high-pressure turbine wheel 18 are respectively fixedly connected to the low-pressure rotor shaft and the high-pressure rotor shaft through a locking structure. Figure 6 shown.

[0045] The driving assembly 14 includes a driving shaft, a driving shaft lifting lug, a support bearing and a driving shaft support. Two support bearings are provided. The driving shaft is connected to the driving shaft support via the two support bearings. The driving shaft lifting lug is provided on the driving shaft.

[0046] One end of the second driving unit 3 is connected to a driving main bevel gear 20 , one side of the driving main bevel gear 20 is meshedly connected to a driving slave bevel gear 21 , and the driving slave bevel gear 21 is connected to the input end of the driving shaft.

[0047] The output end of the drive shaft and the input end of the high-pressure rotor shaft are both provided with four drive shaft hanging ears, through which the drive shaft and the high-pressure rotor shaft are connected by fishing line or kite line, so as to transmit speed to the high-pressure rotor 8 without transmitting force. The high-pressure rotor 8 is driven by the motor driving the drive shaft through gears, and then the driving force is transmitted to the high-pressure rotor 8 through the soft connection (thin wire, etc.) between the hanging ears. In this way, it is possible to avoid transmitting lateral force to the high-pressure rotor 8, thereby affecting the dynamic behavior of the rotor.

[0048] The first bearing and the third bearing are both ball bearings, the second bearing and the fifth bearing are both roller bearings, and the first bearing and the first bearing support 9, the second bearing and the second bearing support 10, the third bearing and the third bearing support 11, and the fifth bearing and the fifth bearing support 13 are all connected by bolts.

[0049] Embodiment 1

[0050] like Figure 3 As shown, the low-pressure rotor 7 and the high-pressure rotor 8 are connected by an intermediate bearing 19, that is, when the test bench constructed is a test bench with an intermediate bearing 19 structure, a dual-rotor test bench with an intermediate bearing 19 (such as a dual-rotor aircraft engine) is realized, and the second support of the high-pressure rotor 8 is provided with an intermediate bearing 19, and the intermediate bearing 19 is a roller bearing.

[0051] Embodiment 2

[0052] like Figure 4 As shown, the low-pressure rotor 7 and the high-pressure rotor 8 are connected by a double-cage structure, that is, the test bench constructed is a double-cage structure test bench, realizing a double-rotor test bench with a double-cage structure (without an intermediate bearing 19, such as the GT25000 gas turbine structure), as shown in FIG. Figure 7-8 As shown, the double squirrel cage structure includes a first squirrel cage structure and a second squirrel cage structure. The first squirrel cage structure is composed of a second bearing support 10 and a third bearing support 11 connected to a first solid thin rod by bolt two; the second squirrel cage structure is composed of a fourth bearing disc 12 and a fifth bearing support 13 connected to a second solid thin rod by bolt three.

[0053] Therefore, the present invention adopts a dual-rotor test bench device of the above structure, and realizes the construction of two different test benches by replacing parts. The components are highly concentric when assembled to ensure that the vibration caused by the imbalance of the rotor system during operation is minimized and the imbalance accuracy grade standard of rotating machinery is met. The dual-rotor test bench of the present invention can simulate the dual-rotor structure system of the aircraft engine to a great extent, and has a scientific structure, simple process, few workpieces, light weight and low cost, high speed and easy promotion. It can be used to carry out experiments such as the dynamic characteristics of the dual-rotor system, and is suitable for scientific researchers to carry out related work on the structural optimization design of the dual-rotor system of gas turbines and aircraft engines.

[0054] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that they can still modify or replace the technical solution of the present invention with equivalents, and these modifications or equivalent replacements cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of the present invention.

Claims

1. A dual-rotor test bench device, characterized in that: It includes an optical platform and a driving system, a dual-rotor system, a control system and a testing system arranged above the optical platform; The optical platform includes an optical platform table top and vibration isolation legs arranged below the optical platform table top; The driving system includes a first driving unit and a second driving unit, and the first driving unit and the second driving unit are connected to the optical platform table through a first base and a second base respectively; The dual rotor system includes a low-pressure rotor connected to a first drive unit through a spring coupling and a high-pressure rotor connected to a second drive unit through a drive assembly, and the axes of the low-pressure rotor and the high-pressure rotor are arranged on the same horizontal line; The control system includes the trio motion controller; The test system includes a displacement sensor and a sensor base for fixing the displacement sensor; The driving assembly includes a driving shaft, a driving shaft lifting lug, a support bearing and a driving shaft support, two support bearings are provided, the driving shaft is connected to the driving shaft support through the two support bearings, and the driving shaft lifting lug is provided on the driving shaft; The low-pressure rotor and the high-pressure rotor are connected via an intermediate bearing or a double squirrel cage structure; The low-pressure rotor comprises a low-pressure rotor shaft and a first bearing, a second bearing and a fifth bearing arranged on the low-pressure rotor shaft, wherein the first bearing, the second bearing and the fifth bearing are connected to the optical platform table through a first bearing support, a second bearing support and a fifth bearing support respectively; The high-pressure rotor comprises a high-pressure rotor shaft and a third bearing and a fourth bearing arranged on the high-pressure rotor shaft, the third bearing is connected to the optical platform table through a third bearing support, and a fourth bearing disc is arranged on the fourth bearing; The output end of the drive shaft and the input end of the high-pressure rotor shaft are both provided with four drive shaft lifting ears, and the drive shaft and the high-pressure rotor shaft are connected by means of the drive shaft lifting ears using fishing line or kite line; The double squirrel cage structure includes a first squirrel cage structure and a second squirrel cage structure. The first squirrel cage structure is composed of a second bearing support and a third bearing support connected to a first solid thin rod through bolt two; the second squirrel cage structure is composed of a fourth bearing disc and a fifth bearing support connected to a second solid thin rod through bolt three.

2. A dual-rotor test bench device according to claim 1, characterized in that: A low-pressure compressor wheel and a low-pressure turbine wheel are also arranged on the low-pressure rotor shaft.

3. A dual-rotor test bench device according to claim 2, characterized in that: A high-pressure compressor wheel and a high-pressure turbine wheel are also provided on the high-pressure rotor shaft, and the low-pressure compressor wheel and the low-pressure turbine wheel, and the high-pressure compressor wheel and the high-pressure turbine wheel are fixedly connected to the low-pressure rotor shaft and the high-pressure rotor shaft respectively through a locking structure.

4. A dual-rotor test bench device according to claim 3, characterized in that: One end of the second driving unit is connected to a driving main bevel gear, one side of the driving main bevel gear is meshedly connected to a driving slave bevel gear, and the driving slave bevel gear is connected to the input end of the driving shaft.

5. A dual-rotor test bench device according to claim 1, characterized in that: The first bearing and the third bearing are both ball bearings, the second bearing, the fourth bearing and the fifth bearing are all roller bearings, and the first bearing and the first bearing support, the second bearing and the second bearing support, the third bearing and the third bearing support, the fourth bearing and the fourth bearing disc, and the fifth bearing and the fifth bearing support are all connected by bolts.

6. A dual-rotor test bench device according to claim 1, characterized in that: The intermediate bearing is configured as a roller bearing.

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