Power transmission rotor vibration test bench capable of simulating multi-vibration-source excitation

Abstract

The invention provides a power transmission rotor vibration test bench capable of simulating multi-vibration-source excitation. Comprising a T-groove workbench, a variable frequency motor, a transverse sliding table with a groove, a motor support, a coupler, 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 and a signal modulator. A data collector; and a computer. The device can be used for testing the dynamic characteristics of the rotor under various vibration excitation working conditions. The transverse positions of the variable frequency motor and the first bearing seat can be adjusted through the transverse sliding table with the groove, and the working conditions of shaft misalignment and gear transmission center distance change are simulated; a radial loading device is adopted to adjust the applied radial load; an eccentric mass can be added into the mass disc to simulate an unbalanced mass; different load working conditions are 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] The power transmission system is a key component in many mechanical devices and is widely used in automobiles, generators, compressors and other equipment. When designing and developing the power transmission system, the dynamic characteristics of the rotor need to be fully tested to ensure its stability and reliability in actual work. However, traditional rotor test benches can often only simulate a single or limited type of excitation, such as unbalanced mass, and it is difficult to fully reflect the complex dynamic behavior of the rotor under actual working conditions. In addition, the structures of various parts of traditional test benches are generally relatively fixed, and the positions of motors, gears, bearings and other parts cannot be flexibly adjusted, which greatly limits the scope and flexibility of the test.

[0003] With the continuous development of mechanical technology, the testing requirements for power transmission systems are becoming higher and higher. Existing rotor test benches are insufficient in simulating multiple dynamic excitation effects and cannot meet the needs of modern mechanical design. For example, the rotor in actual work will not only be affected by unbalanced forces, but also encounter multiple dynamic excitations such as friction and vibration. Therefore, a test bench that can simulate multiple dynamic excitations is needed to more comprehensively test and verify the vibration characteristics of the rotor. Summary of the invention

[0004] In view of the shortcomings of the prior art, the present invention provides a power transmission rotor vibration test bench with simulated multi-vibration source excitation, which has the characteristics of simple structure and convenient operation; a variety of excitation conditions can be set, including mass imbalance, shaft misalignment, radial load, gear transmission center distance change, load change, etc. It can be used to simulate the performance test and fault diagnosis of automobiles or other transmission systems, providing a reference for the design and optimization of rotors.

[0005] To achieve the above-mentioned purpose, the technical scheme adopted by the present invention is: a power transmission rotor vibration test bench with simulated multi-vibration source excitation, comprising: a T-slot workbench, a variable frequency motor, a transverse groove slide, a motor support, a coupling, a first rotating shaft, a first bearing seat, a mass disk, a 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 bracket, a second bracket, a tension controller, a frequency converter, a signal modulator, a data collector and a computer; The variable frequency motor is mounted on a transverse grooved slide, the transverse grooved slide 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 sleeves, and is circumferentially fixed with the first rotating shaft through a flat key, the large gear and the pinion are axially fixed with the shaft shoulder and the sleeve, and are circumferentially fixed with the rotating shaft through a flat key; The second rotating shaft is provided with two second bearing seats and a pinion gear, and 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.

[0006] 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.

[0007] Furthermore, the variable frequency motor is driven by a frequency converter, and the frequency converter is connected to the variable frequency motor and adjusts the rotation speed of the variable frequency motor.

[0008] Furthermore, the second bearing seat is installed on the T-slot workbench and can move axially along the T-slot, and the bearing therein is fixed in the bearing seat through the shoulder on the shaft and the bearing end cover.

[0009] 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, and bolts of different masses can be installed in the holes to perform unbalanced mass experiments.

[0010] 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.

[0011] 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 a shaft shoulder and a shaft sleeve, and are circumferentially fixed by a flat key and the rotating shaft, and the two gears are meshed to transmit power.

[0012] 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 operation of the rotor under different loads.

[0013] 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.

[0014] Furthermore, the second bracket is used to place a photoelectric sensor, which is directly opposite to the large gear. A test strip is attached to the large gear, which can measure the rotor speed in real time.

[0015] Furthermore, the data collector is responsible for collecting the signal conditioned by the signal modulator, transmitting the signal to the computer, and processing and displaying the measured signal accordingly.

[0016] Compared with the prior art, the present invention has the following technical effects:

[0017] (1) The test bench can simulate a variety of complex working conditions, including rotor misalignment, mass imbalance, radial load, gear transmission center distance changes and different load conditions. This enables the test bench to fully evaluate the characteristics and stability of the rotor in actual applications during the test process, 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 working conditions.

[0018] (2) The components of this test bench are easy to install and adjust. In particular, the scale on the transverse grooved slide makes it more convenient and accurate to manually adjust the transverse position of the variable frequency motor and the first bearing seat, which can meet different test requirements. This improves the flexibility of the test bench and reduces the difficulty of operation.

[0019] (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 signal is accurately processed and transmitted to the computer for real-time analysis and display. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a general schematic diagram of a power transmission rotor vibration test bench system with simulated multi-vibration source excitation of the present invention;

[0021] Figure 2 It is a schematic diagram of the structure of the transverse grooved slide table of the power transmission rotor vibration test bench with simulated multi-vibration source excitation of the present invention;

[0022] Figure 3 It is a schematic structural diagram of a radial loading device of a power transmission rotor vibration test bench with simulated multi-vibration source excitation according to the present invention;

[0023] Figure 4 An exploded view of a radial loading device of a power transmission rotor vibration test bench having simulated multi-vibration source excitation according to the present invention;

[0024] Figure 5 It 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;

[0025] Figure 6 It is a schematic diagram of the first bracket structure of the power transmission rotor vibration test bench with simulated multi-vibration source excitation of the present invention;

[0026] Figure 7 It is a schematic diagram of the second bracket structure of the power transmission rotor vibration test bench with simulated multi-vibration source excitation of the present invention; DETAILED DESCRIPTION

[0027] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0028] 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 groove 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; The variable frequency motor 2 is installed on the transverse grooved slide 3, and the transverse grooved slide 3 is installed on the T-slot workbench 1 through the motor support 4. The variable frequency motor 2 is connected to one end of the first rotating shaft 6 through the 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 sleeves 9 and circumferentially fixed with the first rotating shaft 6 by a flat key. The large gear 11 and the pinion 12 are axially fixed with the sleeve 9 by a shaft shoulder and circumferentially fixed with 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 a magnetic powder brake support 16 , and the magnetic powder brake support 16 is installed on the T-slot workbench 1 .

[0029] The T-slot workbench 1 is provided with a plurality of T-slots, which are arranged along the length direction of the workbench, and the slots are spaced apart from each other and evenly distributed on the workbench.

[0030] like Figure 2 As 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.

[0031] The transverse grooved slide 3 is fixed on 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 not aligned, and a misalignment experiment can be performed. 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, so as to explore the response of the system when the gear center distance changes.

[0032] The variable frequency motor 2 is driven by a frequency converter 20 , and the frequency converter 20 is connected to the variable frequency motor 2 and can adjust the rotation speed of the variable frequency motor 2 .

[0033] 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.

[0034] The mass disk 8 is connected to the first rotating shaft 6, and is axially fixed by two bushings 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.

[0035] 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 lower part of the bearing bracket 101, and a compression spring 103 is connected to the lower part of 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 under the compression spring 103 and connected to the threaded rod 104; a base 106 is placed under the loading nut 105, and the threaded rod 104 passes through it; the compression spring 103 is compressed by screwing the loading nut 105, thereby transmitting the force to the force adjustment member 102, and the force adjustment member 102 transmits the 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.

[0036] 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 the shaft shoulder and the shaft sleeve 9, and circumferentially fixed by the flat key and the rotating shaft. The two gears are meshed to transmit power; the gears can use intact or faulty gears to simulate different transmission fault conditions.

[0037] 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 to simulate the operation of the rotor under different loads.

[0038] like Figure 6 As shown, a plurality of holes are formed on the first bracket 17, and the holes are distributed along the circumference of the mass disk. In this embodiment, the holes on the first bracket 17 are formed at positions of 0°, 45°, and 90°, and 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, and then the sensors are connected to the signal modulator 21, and finally connected to the computer 23 via the data acquisition device 22, and the measured data are processed and displayed accordingly.

[0039] 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 via the data acquisition device 22 to process and display the measured data accordingly.

[0040] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0041] In the description of the present invention, unless otherwise specified, "multiple" means two or more; the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, and does 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 worktable (1), frequency conversion motor (2), transverse groove slide (3), motor support (4), coupling (5), first rotating shaft (6), first bearing seat (7), mass plate (8), bushing (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), 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 via two shaft sleeves (9), and is circumferentially fixed to the first rotating shaft (6) via a flat key, the large gear (11) and the small gear (12) are both axially fixed to the shaft sleeve (9) via a shaft shoulder, and are circumferentially fixed to the rotating shaft via a flat key; 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 a magnetic powder brake (15) via a coupling (5); the magnetic powder brake (15) is mounted on a magnetic powder brake support (16); and the magnetic powder brake support (16) is mounted on a T-slot workbench (1).

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

3. The multi-excitation simulation power transmission rotor test bench 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 multi-excitation simulation power transmission rotor test bench 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 multi-excitation simulation power transmission rotor test bench 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 multi-excitation simulation power transmission rotor test bench according to claim 1, characterized in that: The radial loading device (10) comprises a retaining frame (107), a bearing support (101) being arranged in the retaining frame (107); a bearing for a shaft to pass through being arranged in the bearing support (101); a force adjustment member (102) being connected below the bearing support (101), and a compression spring (103) being connected below the force adjustment member (102); a threaded rod (104) passing through the compression spring (103) and the force adjustment member (102); a loading nut (105) being arranged below the compression spring (103) and being connected to the threaded rod (104); a base (106) being arranged below the loading nut (105), the threaded rod (104) passing through the nut, and the base (106) being arranged in the retaining frame (107).

7. The multi-excitation simulation power transmission rotor test bench 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 via a shaft shoulder and a shaft sleeve (9), and circumferentially fixed via a flat key and the rotating shaft, and the two gears are meshed.

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

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

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

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