Power transmission rotor vibration test bed with simulated multi-vibration source excitation

Abstract

The present application provides a power transmission rotor vibration test bench with simulated multi-vibration source excitation, comprising a T-slot workbench, a variable frequency motor, a transverse slotted sliding table, a motor support, a shaft coupling, a first rotating shaft, a first bearing seat, a mass disc, a shaft sleeve, a radial loading device, a large gear, a small gear, a second bearing seat, a second rotating shaft, a magnetic powder brake, a magnetic powder brake support, a first support, a second support, a tension controller, a frequency converter, a signal modulator, a data collector and a computer. The present application can be used for testing the rotor dynamics characteristics under various vibration excitation conditions. The transverse position of the variable frequency motor and the first bearing seat can be adjusted by the transverse slotted sliding table to simulate the conditions of shaft misalignment and gear transmission center distance change; the radial loading device is used to adjust the applied radial load; eccentric mass can be added in the mass disc to simulate unbalanced mass; different load conditions can be simulated by changing the braking force of the magnetic powder brake.

Description

Technical Field

[0001] The invention relates to the field of rotor dynamics and testing, in particular to a power transmission rotor vibration test bench with simulated multi-vibration source excitation. Background Art

[0002] Power transmission systems are key components in many mechanical devices and are widely used in automobiles, generators, compressors, and other equipment. When designing and developing power transmission systems, the dynamic characteristics of the rotor need to be fully tested to ensure its stability and reliability in actual operation. However, traditional rotor test benches can often only simulate a single or limited type of excitation, such as unbalanced mass, making it difficult to fully reflect the complex dynamic behavior of the rotor under actual operating conditions. In addition, the various components of traditional test benches are generally relatively fixed, and the position of parts such as motors, gears, and bearings cannot be flexibly adjusted, which greatly limits the scope and flexibility of the test.

[0003] With the continuous advancement of mechanical technology, the testing requirements for powertrain systems are becoming increasingly stringent. Existing rotor test benches are insufficient in simulating various dynamic excitation effects and cannot meet the demands of modern mechanical design. For example, in actual operation, rotors are not only subject to unbalanced forces but also encounter various dynamic excitations such as friction and vibration. Therefore, a test bench capable of simulating multiple dynamic excitations is needed to more comprehensively test and verify the vibration characteristics of rotors. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the present invention provides a power transmission rotor vibration test bench with simulated multi-source excitation. This test bench features a simple structure and easy operation. It can accommodate a variety of excitation conditions, including mass imbalance, shaft misalignment, radial loads, gear center distance variations, and load variations. This test bench can be used to simulate performance testing and fault diagnosis in automobiles and other transmission systems, providing a reference for rotor design and optimization.

[0005] To achieve the above-mentioned object, the technical solution adopted by the present invention is as follows: a power transmission rotor vibration test bench with simulated multi-vibration source excitation, comprising: a T-slot workbench, a variable frequency motor, a transverse grooved slide, a motor support, a coupling, a first rotating shaft, a first bearing seat, a mass disk, a bushing, a radial loading device, a large gear, a small gear, a second bearing seat, a second rotating shaft, a magnetic powder brake, a magnetic powder brake support, a first bracket, a second bracket, a tension controller, a frequency converter, a signal modulator, a data collector, and a computer;

[0006] The variable frequency motor is mounted on a transverse grooved slide, which is mounted on a T-slot workbench through a motor support. The variable frequency motor is connected to one end of the first rotating shaft through a coupling. Two first bearing seats, a mass disk and a large gear are arranged on the first rotating shaft. The mass disk is axially fixed by two bushings and circumferentially fixed to the first rotating shaft through a flat key. The large gear and the pinion are both axially fixed to the bushing through a shaft shoulder and circumferentially fixed to the rotating shaft through a flat key.

[0007] Two second bearing seats and a pinion are arranged on the second rotating shaft. The end away from the motor is connected to the magnetic powder brake through a coupling. The magnetic powder brake is installed on the magnetic powder brake support, and the magnetic powder brake support is installed on the T-slot workbench.

[0008] Furthermore, the side of the transverse grooved slide is marked with scales, and its main structure is a T-slot, which allows the variable frequency motor and the first bearing seat to move laterally. The variable frequency motor and the first bearing seat are fixed to the transverse grooved slide with bolts.

[0009] Furthermore, the variable frequency motor is driven by a frequency converter, which is connected to the variable frequency motor and adjusts the rotation speed of the variable frequency motor.

[0010] Furthermore, the second bearing seat is mounted on a T-slot workbench and can move axially along the T-slot, and the bearing therein is fixed in the bearing seat through a shoulder on the shaft and a bearing end cover.

[0011] Furthermore, the mass disk is connected to the first rotating shaft, axially fixed by two bushings, and circumferentially fixed to the first rotating shaft by a flat key; a plurality of holes are provided on the mass disk, in which bolts of different masses can be installed to conduct unbalanced mass experiments.

[0012] Furthermore, the radial loading device includes a retaining frame, and slide grooves are provided on both sides of the retaining frame, and the bearing bracket and the base are embedded and installed in the slide grooves; a bearing for the shaft to pass through is provided in the bearing bracket; a force adjustment piece is connected below the bearing bracket, and a compression spring is connected below the force adjustment piece; the threaded rod passes through the compression spring and the force adjustment piece; the loading nut is placed below the compression spring and connected to the threaded rod; the base is placed below the loading nut, and the threaded rod passes through it.

[0013] Furthermore, the large gear and the small gear are respectively located on the first rotating shaft and the second rotating shaft, and are axially fixed by the shaft shoulder and the shaft sleeve, and are circumferentially fixed by the flat key and the rotating shaft. The two gears are meshed to transmit power.

[0014] Furthermore, the magnetic powder brake is connected to one end of the second rotating shaft through a coupling, and the tension controller is connected to the magnetic powder brake, which can accurately control the braking torque generated by the magnetic powder brake and simulate the rotor operation under different loads.

[0015] Furthermore, the first bracket is provided with a plurality of holes, which can be used to place eddy current sensors to measure the vibration displacement signals of the rotor in the horizontal and vertical directions in real time.

[0016] Furthermore, the second bracket is used to place a photoelectric sensor, which is facing the large gear. A test strip is attached to the large gear, which can measure the rotor speed in real time.

[0017] Furthermore, the data collector is responsible for collecting the signal conditioned by the signal modulator, transmitting the signal to the computer, and performing corresponding processing on the measurement signal and displaying it.

[0018] Compared with the prior art, the present invention has the following technical effects:

[0019] (1) This test bench can simulate a variety of complex operating conditions, including rotor misalignment, mass imbalance, radial loads, gear transmission center distance changes, and different load conditions. This allows the test bench to fully evaluate the characteristics and stability of the rotor in actual applications during testing, such as performance testing and fault diagnosis of automotive transmission systems, and provide a reference for rotor design and optimization. Traditional test benches can usually only simulate a single excitation condition and cannot fully reflect the actual performance of the rotor under various operating conditions.

[0020] (2) The components of this test bench are easy to install and adjust. In particular, the scale on the horizontal grooved slide makes it more convenient and accurate to manually adjust the horizontal position of the variable frequency motor and the first bearing seat, which can adapt to different test requirements. This improves the flexibility of the test bench and reduces the difficulty of operation.

[0021] (3) This test bench is equipped with a variety of sensors that can comprehensively monitor the operating status of the rotor. Through the signal modulator and data acquisition device, the sensor signals are accurately processed and transmitted to the computer for real-time analysis and display. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 Schematic diagram of the overall system of the power transmission rotor vibration test bench with simulated multi-vibration source excitation according to the present invention;

[0023] Figure 2 Schematic diagram of the structure of the transverse grooved slide of the power transmission rotor vibration test bench with simulated multi-vibration source excitation of the present invention;

[0024] Figure 3 Schematic diagram of the structure of the radial loading device of the power transmission rotor vibration test bench with simulated multi-vibration source excitation of the present invention;

[0025] Figure 4 An exploded view of the radial loading device of the power transmission rotor vibration test bench with simulated multi-vibration source excitation according to the present invention;

[0026] Figure 5 This is a schematic diagram of the structure of a magnetic powder brake support of a power transmission rotor vibration test bench with simulated multi-vibration source excitation according to the present invention;

[0027] Figure 6 This is a schematic structural diagram of a first bracket of a power transmission rotor vibration test bench with simulated multi-vibration source excitation according to the present invention;

[0028] Figure 7 This is a schematic diagram of the second bracket structure of the power transmission rotor vibration test bench with simulated multi-vibration source excitation according to the present invention; DETAILED DESCRIPTION

[0029] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0030] The present invention provides a power transmission rotor vibration test bench with simulated multi-vibration source excitation, such as Figure 1 As shown, it includes a T-slot workbench 1, a frequency conversion motor 2, a transverse grooved slide 3, a motor support 4, a coupling 5, a first rotating shaft 6, a first bearing seat 7, a mass disk 8, a sleeve 9, a radial loading device 10, a large gear 11, a small gear 12, a second bearing seat 13, a second rotating shaft 14, a magnetic powder brake 15, a magnetic powder brake support 16, a first bracket 17, a second bracket 18, a tension controller 19, a frequency converter 20, a signal modulator 21, a data collector 22 and a computer 23;

[0031] The variable frequency motor 2 is mounted on a transverse grooved slide 3, which is mounted on a T-slot workbench 1 through a motor support 4. The variable frequency motor 2 is connected to one end of a first rotating shaft 6 through a coupling 5. Two first bearing seats 7, a mass disk 8, and a large gear 11 are arranged on the first rotating shaft 6. The mass disk 8 is axially fixed by two bushings 9 and circumferentially fixed to the first rotating shaft 6 through a flat key. The large gear 11 and the pinion 12 are both axially fixed to the bushing 9 through a shaft shoulder and circumferentially fixed to the rotating shaft through a flat key.

[0032] Two second bearing seats 13 and a pinion 12 are arranged on the second rotating shaft 14. The end away from the motor is connected to the magnetic powder brake 15 through a coupling 5. The magnetic powder brake 15 is installed on the magnetic powder brake support 16, and the magnetic powder brake support 16 is installed on the T-slot workbench 1.

[0033] The T-slot workbench 1 is provided with a plurality of T-slots, which are opened along the length direction of the workbench. The slots are spaced apart and evenly distributed on the workbench.

[0034] like Figure 2As shown, the side of the transverse grooved slide 3 is marked with scales, and its main structure is a T-slot, which allows the variable frequency motor 2 and the first bearing seat 7 to move horizontally. The variable frequency motor 2 and the first bearing seat 7 are fixed to the transverse grooved slide with bolts.

[0035] The transverse grooved slide 3 is fixed to the T-slot workbench 1 with bolts, and its axial position can be manually adjusted along the T-slot; the transverse grooved slide 3 can be used to adjust the lateral displacement of the variable frequency motor 2 so that the motor shaft and the axis of the first rotating shaft 6 are misaligned to perform a misalignment experiment; the lateral displacement of the two first bearing seats 7 on the first rotating shaft 6 can also be adjusted to change the center distance between the large gear 11 and the small gear 12 on the two shafts, and explore the response of the system when the gear center distance changes.

[0036] The variable frequency motor 2 is driven by a frequency converter 20 , which is connected to the variable frequency motor 2 and can adjust the speed of the variable frequency motor 2 .

[0037] The second bearing seat 13 is used to support the second rotating shaft 14, which is installed on the T-slot workbench 1 and can move axially along the T-slot. The bearing therein is fixed in the bearing seat through the shoulder on the shaft and the bearing end cover.

[0038] The mass disk 8 is connected to the first rotating shaft 6, and is axially fixed by two shaft sleeves 9, and is circumferentially fixed to the first rotating shaft 6 by a flat key; a plurality of holes are provided on the mass disk 8, and bolts of different masses can be installed in the holes to perform unbalanced mass experiments.

[0039] like Figure 3 and Figure 4 As shown, the radial loading device 10 includes a retaining frame 107, and slide grooves are provided on both sides of the retaining frame 107, and the bearing bracket 101 and the base 106 are embedded and installed in the slide grooves; a bearing for the shaft to pass through is provided in the bearing bracket 101; a force adjustment member 102 is connected to the bottom of the bearing bracket 101, and a compression spring 103 is connected to the bottom of the force adjustment member 102; the threaded rod 104 passes through the compression spring 103 and the force adjustment member 102; the loading nut 105 is placed under the compression spring 103 and connected to the threaded rod 104; the base 106 is placed under the loading nut 105, and the threaded rod 104 passes through it; by screwing the loading nut 105, the compression spring 103 is compressed, thereby transmitting force to the force adjustment member 102, and the force adjustment member 102 transmits force to the bearing bracket 101, thereby applying radial force to the shaft; a pressure sensor is provided on the force adjustment member 102, which can measure the radial force applied to the shaft in real time.

[0040] The large gear 11 and the small gear 12 are respectively located on the first rotating shaft 6 and the second rotating shaft 14, and are axially fixed to the shaft sleeve 9 through the shaft shoulder and circumferentially fixed to the rotating shaft through the flat key. The two gears are engaged to transmit power; the gears can use intact or faulty gears to simulate different transmission failure conditions.

[0041] The magnetic powder brake 15 is connected to one end of the second rotating shaft 14 through the coupling 5. The tension controller 19 is connected to the magnetic powder brake 15 to accurately control the braking torque generated by the magnetic powder brake 15 and simulate the rotor operation under different loads.

[0042] like Figure 6 As shown, the first bracket 17 is provided with a plurality of holes, each of which is distributed along the circumference of the mass disk. In this embodiment, the holes on the first bracket 17 are provided at positions of 0°, 45°, and 90°. Eddy current sensors are placed at the positions of 0° and 90°, respectively, to measure the vibration displacement signals of the rotor in the horizontal and vertical directions in real time. The sensors are then connected to a signal modulator 21, and finally to a computer 23 via a data collector 22, so that the measured data are processed and displayed accordingly.

[0043] In this embodiment, the second bracket 18 is used to place a photoelectric sensor, which is facing the large gear 11. A test strip is attached to the large gear 11, which can measure the rotor speed in real time. The sensor is then connected to the signal modulator 21, and finally connected to the computer 23 through the data collector 22 to process and display the measured data accordingly.

[0044] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0045] In the description of the present invention, unless otherwise specified, the meaning of "multiple" is two or more; the orientations or positional relationships indicated by the terms "upper", "lower", "inner", "outer", etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Claims

1. A power transmission rotor vibration test bench with simulated multi-vibration source excitation, characterized in that: include: T-slot workbench (1), frequency conversion motor (2), transverse groove slide (3), motor support (4), coupling (5), first rotating shaft (6), first bearing seat (7), mass disk (8), shaft sleeve (9), radial loading device (10), large gear (11), small gear (12), second bearing seat (13), second rotating shaft (14), magnetic powder brake (15), magnetic powder brake support (16), first bracket (17), second bracket (18), tension controller (19), frequency converter (20), signal modulator (21), data acquisition device (22) and computer (23); The variable frequency motor (2) is mounted on a transverse grooved slide (3), and the transverse grooved slide (3) is mounted on a T-groove workbench (1) via a motor support (4). The variable frequency motor (2) is connected to one end of a first rotating shaft (6) via a coupling (5). Two first bearing seats (7), a mass disk (8) and a large gear (11) are arranged on the first rotating shaft (6). The mass disk (8) is axially fixed by two shaft sleeves (9) and is circumferentially fixed to the first rotating shaft (6) by a flat key. The large gear (11) and the small gear (12) are both axially fixed to the shaft sleeve (9) by a shaft shoulder and are circumferentially fixed to the rotating shaft by a flat key. Two second bearing seats (13) and a pinion (12) are arranged on the second rotating shaft (14), and the end away from the motor is connected to the magnetic powder brake (15) through a coupling (5). The magnetic powder brake (15) is installed on the magnetic powder brake support (16), and the magnetic powder brake support (16) is installed on the T-slot workbench (1).

2. The power transmission rotor vibration test bench with simulated multi-vibration source excitation according to claim 1, characterized in that: The transverse grooved slide (3) is marked with scales, enabling the variable frequency motor (2) and the first bearing seat (7) to move in the transverse direction.

3. The power transmission rotor vibration test bench with simulated multi-vibration source excitation according to claim 1, characterized in that: The variable frequency motor (2) and the first rotating shaft (6) are connected via a coupling (5).

4. The power transmission rotor vibration test bench with simulated multi-vibration source excitation according to claim 1, characterized in that: The bearing seat is used to place the bearing and is fixed on the shaft through the bearing end cover and the shaft shoulder.

5. The power transmission rotor vibration test bench with simulated multi-vibration source excitation according to claim 1, characterized in that: The mass disk (8) is axially fixed by two shaft sleeves (9) and circumferentially fixed to the first rotating shaft (6) by a flat key; a plurality of holes are provided on the mass disk (8), and bolts of different masses can be installed in the holes to perform an unbalanced mass experiment.

6. The power transmission rotor vibration test bench with simulated multi-vibration source excitation according to claim 1, characterized in that: The radial loading device (10) comprises a retaining frame (107), a bearing support (101) provided in the retaining frame (107); a bearing for a shaft to pass through provided in the bearing support (101); a force adjustment member (102) is connected below the bearing support (101), and a compression spring (103) is connected below the force adjustment member (102); a threaded rod (104) passes through the compression spring (103) and the force adjustment member (102); a loading nut (105) is placed below the compression spring (103) and connected to the threaded rod (104); a base (106) is placed below the loading nut (105), the threaded rod (104) passes through it, and the base (106) is placed in the retaining frame (107).

7. The power transmission rotor vibration test bench with simulated multi-vibration source excitation according to claim 1, characterized in that: The large gear (11) and the small gear (12) are respectively located on the first rotating shaft (6) and the second rotating shaft (14), and are axially fixed by a shaft shoulder and a shaft sleeve (9), and are circumferentially fixed by a flat key and the rotating shaft, and the two gears are meshed.

8. The power transmission rotor vibration test bench with simulated multi-vibration source excitation according to claim 1, characterized in that: The magnetic powder brake (15) is connected to one end of the second rotating shaft (14) through a coupling (5) and is used to simulate the operation of the rotor under different load conditions.

9. The power transmission rotor vibration test bench with simulated multi-vibration source excitation according to claim 1, characterized in that: The first bracket (17) is provided with a plurality of holes for placing sensors.

10. The power transmission rotor vibration test bench with simulated multi-vibration source excitation according to claim 7, characterized in that: The large gear (11) and the small gear (12) can use intact gears or faulty gears.

Images