A multifunctional torsional vibration test system

Abstract

The application discloses a multifunctional torsional vibration test system, which solves the technical problems of single function and large energy consumption of the torsional vibration test equipment in the prior art. It comprises a three-phase feeding module, a regenerative rectification module, a driving control module, a filter module, an inverter module and a torsional vibration motor. The three-phase feeding module is electrically connected with the regenerative rectification module. The regenerative rectification module is electrically connected with the driving control module through a DC bus A. The driving control module is electrically connected with the filter module through a DC bus B. The filter module is electrically connected with the inverter module through a DC bus C. The inverter module is electrically connected with the torsional vibration motor. The torsional vibration motor is connected with a load through a mechanical transmission device. The driving control module receives the input of a torque pulsation control signal, adjusts and outputs the torque pulsation control signal to the inverter module, so that the electric energy circulates through the DC bus. The application can realize various torsional vibration tests, has low power consumption and high motor control precision.

Description

TECHNICAL FIELD

[0001] The present application relates to a torsional vibration test system, in particular to a multifunctional torsional vibration test system, and belongs to the technical field of testing. BACKGROUND

[0002] The engine front end drive mainly includes an automatic tension pulley, a load pulley and an idler pulley, the function of the front end drive is to transmit power of the engine to each accessory and make it work at a proper speed, avoid the situation of serious driving belt slip, shaking and abnormal sound, so as to control the noise and vibration of the drive itself, therefore, the design of the engine front end drive will directly affect the efficiency and reliability of the engine.

[0003] During the design process of the engine front end drive, the test items needed to be carried out include: tension pulley endurance test; speed impact test; overspeed test; sawtooth cycle test; tension pulley deflection test; online monitoring of the rotational speed of each output shaft in the drive; online monitoring of the temperature of each bearing in the drive; online monitoring of the temperature and amplitude of the belt; online monitoring of the angle swing value of the tension pulley; online monitoring of the dynamic tension of the belt; online monitoring of the dynamic load of the idler.

[0004] During the design process of the engine front end drive, the test is generally carried out through a torsional vibration test device. However, the existing torsional vibration test device has the disadvantages of single function and large energy consumption.

[0005] The applicant finds that the prior art at least has the following technical problems:

[0006] 1. In the prior art, the torsional vibration test device has a single function;

[0007] 2. In the prior art, the torsional vibration test device has large energy consumption. SUMMARY

[0008] The present application relates to a torsional vibration test system, in particular to a multifunctional torsional vibration test system, and belongs to the technical field of testing.

[0009] To achieve the above-mentioned purpose, the present application provides the following technical solutions:

[0010] The multifunctional torsional vibration test system comprises a three-phase power supply module and a driving control system, the driving control system comprises a regenerative rectifier module, a driving control module, a filter module, an inverter module and a torsional vibration motor, the three-phase power supply module is electrically connected with the regenerative rectifier module, the regenerative rectifier module is electrically connected with the driving control module through a DC bus A, the driving control module is electrically connected with the filter module through a DC bus B, the filter module is electrically connected with the inverter module through a DC bus C, the inverter module is electrically connected with the torsional vibration motor, and the torsional vibration motor is connected with a load through a mechanical transmission device, wherein the functions of each component are as follows:

[0011] The three-phase power supply module is used for providing three-phase alternating current to the regenerative rectifier module and accepting the feedback electric energy of the regenerative rectifier module.

[0012] The regenerative rectifier module is used for rectifying the three-phase alternating current provided by the three-phase power supply module and converting the three-phase alternating current into direct current input to the DC bus A, and feeding back part of the electric energy in the DC bus A to the three-phase power supply module.

[0013] The driving control module is used for receiving the input of a torque pulsation control signal, adjusting and outputting the torque pulsation control signal to the inverter module, and circulating electric energy through the DC bus A, the DC bus B and the DC bus C.

[0014] The filter module is used for isolating noise signals and preventing the torque pulsation control signal from being disturbed.

[0015] The inverter module is used for converting the torque pulsation control signal output by the driving control module into alternating current, delivering the alternating current to the torsional vibration motor, and monitoring the rotating speed of the torsional vibration motor.

[0016] The torsional vibration motor is used for driving the load to realize torsional vibration simulation through the mechanical transmission device.

[0017] The load is a front end train system simulation device of a to-be-tested engine, which is used for being driven by the torsional vibration motor to realize torsional vibration simulation.

[0018] Further, the inverter unit detects the motor speed through a pulse encoder interface.

[0019] Further, the torsional vibration motor is a single-output shaft.

[0020] Further, the three-phase power supply module comprises a plurality of three-phase step-up isolation transformers.

[0021] Further, the rectification mode of the regenerative rectifier module comprises four-quadrant rectification.

[0022] Further, the driving control module adjusts the torque pulsation control signal in a speed mode and a torque mode, the speed mode adjusts the frequency and amplitude of the torque pulsation control signal by torque limiting, and the torque mode adjusts the frequency and amplitude of the torque pulsation control signal by speed limiting.

[0023] Further, the driving control module controls the torsional vibration motor to switch between the motoring mode and the regenerative braking mode to circulate electric energy through the DC bus A, the DC bus B, and the DC bus C.

[0024] Further, when the torsional vibration motor switches to the motoring mode, the control mode of the torsional vibration motor includes a constant torque control mode, a constant speed control mode, a torque pulsation simulation control mode, and other custom program control modes.

[0025] Further, the driving control module inputs the torque pulsation control signal in the following modes:

[0026] The user defines the amplitude and frequency to generate the torque pulsation control signal.

[0027] The torque pulsation control signal is generated by tracking an externally generated pulsation simulation signal.

[0028] The torque pulsation control signal is generated by using a torque pulsation data packet downloaded into the driving control module, and the torque pulsation data packet includes a torque data table and an average speed instruction.

[0029] Further, the driving control module is controlled in the following modes:

[0030] A remote control mode, in which the driving control module receives instructions and control quantities transmitted by an upper computer through a communication network, and the driving control module can simultaneously perform data interaction communication with the upper computer through the communication network, and the control quantities include the frequency and amplitude of the torque pulsation control signal.

[0031] A local control mode, in which the driving control module inputs instructions and control quantities through a control keyboard or a human-computer interaction interface, controls the start and stop of the driving control system, and controls whether to monitor the working condition of the driving control system through the control keyboard or the human-computer interaction interface.

[0032] Further, when the driving control system is monitored in the local control mode, the monitored parameters include the speed of the torsional vibration motor, the voltage and current of the system.

[0033] Further, the driving control system includes multiple protection functions such as grounding, short circuit, overcurrent, overvoltage, open phase, and electric leakage.

[0034] Further, the load includes a crankshaft, a pulley, a generator, an air conditioner, a water pump, and a fan.

[0035] Based on the above technical solutions, the embodiment of the present application can at least produce the following technical effects:

[0036] (1) The multifunctional torsional vibration test system provided by the present application realizes the following main functions: 1. Engine torque simulation output function; 2. Dynamic output according to a given torque curve; 3. High-frequency torque output (not only can simulate engine fundamental frequency torque output, but also can simulate generating torque pulsation harmonic output signal, and truly simulate engine working condition); 4. NVH noise, vibration and smoothness test configuration (can meet the requirements of extremely low torque fluctuation and super-silence test); 5. Simulation of rotational inertia. The system can be applied to the simulation test of various engine front end drive train accessory systems, transmissions, drive chains, tension pulleys, drive belts, etc.

[0037] (2) The multifunctional torsional vibration test system provided by the present application effectively reduces system power consumption and saves energy by circulating energy through a DC bus between the system leading phase (power supply) end and the output load end. BRIEF DESCRIPTION OF DRAWINGS

[0038] Figure 1 is a structural schematic diagram of the embodiment of the present application. DETAILED DESCRIPTION

[0039] The preferred embodiment of the present application will be described in detail in combination with the accompanying Figure 1 The preferred embodiment of the present application will be described in detail in combination with the accompanying

[0040] As shown in the accompanying Figure 1 The present application provides a multifunctional torsional vibration test system, which comprises a three-phase power supply module and a drive control system. The drive control system comprises a regenerative rectifier module, a drive control module, a filter module, an inverter module and a torsional vibration motor. The three-phase power supply module is electrically connected with the regenerative rectifier module. The regenerative rectifier module is electrically connected with the drive control module through a DC bus A. The drive control module is electrically connected with the filter module through a DC bus B. The filter module is electrically connected with the inverter module through a DC bus C. The inverter module is electrically connected with the torsional vibration motor. The torsional vibration motor is connected with a load through a mechanical transmission device. The functions of each component are as follows:

[0041] The three-phase power supply module is used to provide three-phase alternating current to the regenerative rectifier module and accept the feedback power from the regenerative rectifier module;

[0042] The regenerative rectifier module is used to rectify the three-phase alternating current provided by the three-phase power supply module and convert it into direct current input to the DC bus A, and feedback part of the power in the DC bus A to the three-phase power supply module;

[0043] The drive control module is configured to receive an input of the torque ripple control signal, adjust and output the torque ripple control signal to the inverter module, and circulate electric energy through the DC bus A, the DC bus B and the DC bus C.

[0044] The filter module is configured to isolate noise signals and prevent the torque ripple control signal from being disturbed.

[0045] The inverter module is configured to convert the torque ripple control signal output by the drive control module into alternating current, deliver the alternating current to the torsional vibration motor, and monitor the rotational speed of the torsional vibration motor.

[0046] The torsional vibration motor is configured to drive the load through a mechanical transmission device to realize torsional vibration simulation.

[0047] The load is a front-end wheel train simulation device of an engine to be tested, which is driven by the torsional vibration motor to realize torsional vibration simulation.

[0048] Preferably, the inverter unit detects the motor speed through a pulse encoder interface, uses an incremental encoder interface, supports TTL signals, and monitors A, B and M (Z) three-way signals.

[0049] The torsional vibration motor is a single-output shaft.

[0050] The preferred embodiment of the present application selects an AC asynchronous servo motor (AC torsional vibration motor), and the technical parameter indexes of the motor are as follows:

[0051] Rated power: 210HP (157kW) Rated voltage: 460V AC

[0052] Rated current: 252Apm Rated torque: 854Nm

[0053] Rated speed: 1750rpm Constant power speed: 2150rpm

[0054] Maximum mechanical speed: >2800rpm Rotational inertia: 0.468 kg.m^2

[0055] Overload capacity: 170% (below rated speed).

[0056] Further, the three-phase feeding module comprises a plurality of three-phase step-up isolation transformers, and preferably, in the preferred embodiment of the present application, a three-phase step-up isolation transformer with a main side of 380VAC and a secondary side of 460VAC is adopted.

[0057] Further, the rectification mode of the regenerative rectification module comprises four-quadrant rectification.

[0058] Further, the driving control module adjusts the torque pulsation control signal in a mode including a speed mode and a torque mode, the speed mode adjusts the frequency and amplitude of the torque pulsation control signal by torque limiting, and the torque mode adjusts the frequency and amplitude of the torque pulsation control signal by speed limiting.

[0059] Further, the driving control module controls the torsional vibration motor to switch between the motoring mode and the regenerative braking mode to circulate electric energy through the DC bus A, the DC bus B and the DC bus C.

[0060] Further, when the torsional vibration motor is switched to the motoring mode, the control mode of the torsional vibration motor includes a constant torque control mode, a constant speed control mode, a torque pulsation simulation control mode and other self-defined program control modes.

[0061] Further, the driving control module inputs the torque pulsation control signal in a mode including:

[0062] The user defines the amplitude and frequency to generate the torque pulsation control signal.

[0063] The torque pulsation control signal is generated by tracking an externally generated pulsation simulation signal.

[0064] The torque pulsation control signal is generated by using a torque pulsation data packet downloaded into the driving control module, the torque pulsation data packet includes a torque data table and an average speed instruction.

[0065] In the preferred embodiment of the present application, the torsional vibration signal can be a single sine or cosine, different order harmonics or superposition of several harmonics.

[0066] Further, the driving control module is controlled in a mode including:

[0067] A remote control mode, the driving control module receives instructions and control quantities transmitted by the upper computer through the communication network, the driving control module can also communicate with the upper computer through the communication network, and the control quantities include the frequency and amplitude of the torque pulsation control signal.

[0068] A local control mode, the driving control module inputs instructions and control quantities through a control keyboard or a man-machine interactive interface, and controls the start and stop of the driving control system, and controls whether to monitor the working condition of the driving control system through the control keyboard or the man-machine interactive interface.

[0069] Further, when the driving control system is monitored in the local control mode, the monitored parameters include the speed of the torsional vibration motor, the voltage and current of the system.

[0070] Further, the drive control module has a ground fault detection alarm function, and has motor overheat, overcurrent, overload and other protection functions.

[0071] Preferably, the drive control module has a specific hardware configuration comprising:

[0072] The extended DSP E270 master control board realizes high-speed digital signal processing at a main frequency of 280MHz and simultaneously runs a fast vector rotation control with a coprocessor of the same level;

[0073] The current regulation module realizes high dynamic response and stable DC output;

[0074] The DSP control cooperates with double current loop regulation;

[0075] The built-in current calculator can realize accurate current control without external sensors, and can also share an external current sensor to achieve higher accuracy, or be switched for different application requirements;

[0076] The high-resolution feedback interface can monitor high-resolution voltage feedback signals;

[0077] The 3-channel analog input and 2-channel analog output can realize conversion of various instructions and feedback modes;

[0078] The multi-channel selectable digital isolation input / output realizes reliable and editable multi-channel input / output;

[0079] The RS232 / 485 communication interface realizes simple communication, and the rate can reach 230K Baud Rate;

[0080] Various optional industrial network communication interfaces.

[0081] In the preferred embodiment of the application, the drive control module can smoothly switch between torque mode and speed mode, and the control precision requirements are as follows:

[0082] Torque control precision: error ≤ ±3% (full scale);

[0083] Speed control precision: error ≤ ±0.01% (full scale).

[0084] In the preferred embodiment of the application, the torque pulsation simulation function is realized by simulating the torsional vibration working condition at a given basic speed (including zero speed working condition), generating controllable torque pulsation of torque frequency and torque amplitude, providing high dynamic torque response required for torque pulsation simulation, and outputting high-frequency sinusoidal torque curve. During the test process, the torque pulsation speed, frequency and amplitude can be adjusted online through the host computer (control computer), and the pulsation frequency range is not less than 30-200Hz.

[0085] Further, the drive control system comprises multiple protection functions such as grounding, short circuit, over current, over voltage, open phase, electric leakage and the like.

[0086] Further, the load comprises a crankshaft, a pulley, a generator, an air conditioner, a water pump and a fan.

[0087] The above merely provides a specific implementation of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A multi-functional torsional vibration testing system comprising a three-phase power feeding module and a drive control system, characterized in that, The drive control system comprises a regenerative rectifier module, a drive control module, a filter module, an inverter module, a torsional vibration motor, the three-phase power supply module is electrically connected with the regenerative rectifier module, the regenerative rectifier module is electrically connected with the drive control module through a DC bus A, the drive control module is electrically connected with the filter module through a DC bus B, the filter module is electrically connected with the inverter module through a DC bus C, the inverter module is electrically connected with the torsional vibration motor, and the torsional vibration motor is connected with a load through a mechanical transmission device, wherein the functions of each component are as follows: the three-phase power supply module is used for providing three-phase alternating current to the regenerative rectifier module and receiving the feedback power of the regenerative rectifier module; The regenerative rectifier module is used for rectifying the three-phase alternating current provided by the three-phase power supply module and converting the three-phase alternating current into direct current input to the DC bus A, and feeding back part of the power in the DC bus A to the three-phase power supply module; The drive control module is used for receiving the input of the torque pulsation control signal, adjusting and outputting the torque pulsation control signal to the inverter module, and circulating the power through the DC bus A, the DC bus B and the DC bus C; The filter module is used for isolating noise signals and preventing the torque pulsation control signal from being disturbed; The inverter module is used for converting the torque pulsation control signal output by the drive control module into alternating current and delivering the alternating current to the torsional vibration motor, and is used for monitoring the rotating speed of the torsional vibration motor; The torsional vibration motor is used for driving the load to realize torsional vibration simulation through the mechanical transmission device; The load is a front end wheel train simulation device of an engine to be tested, which is driven by the torsional vibration motor to realize torsional vibration simulation; The drive control module adjusts the torque pulsation control signal in the mode of rotating speed and torque, the rotating speed mode adjusts the frequency and amplitude of the torque pulsation control signal through torque limiting, and the torque mode adjusts the frequency and amplitude of the torque pulsation control signal through rotating speed limiting; The drive control module inputs the torque pulsation control signal in the mode of user-defined amplitude, frequency generation of the torque pulsation control signal; The torque pulsation control signal is generated by tracking an externally generated pulsation simulation signal; The torque pulsation control signal is generated by using a torque pulsation data packet downloaded into the drive control module, and the torque pulsation data packet comprises a torque data table and an average speed instruction.

2. The multi-functional torsional vibration testing system according to claim 1, wherein The three-phase power supply module comprises a plurality of three-phase step-up isolation transformers.

3. The multi-functional torsional vibration testing system according to claim 1, wherein The rectification mode of the regenerative rectifier module comprises four-quadrant rectification.

4. The multi-functional torsional vibration testing system according to claim 1, wherein The drive control module circulates the power through the DC bus A, the DC bus B and the DC bus C by controlling the torsional vibration motor to switch between the electric driving mode and the regenerative braking mode.

5. The multi-functional torsional vibration testing system according to claim 1, wherein When the torsional vibration motor is switched to the electric driving mode, the control mode of the torsional vibration motor comprises a constant torque control mode, a constant rotating speed control mode, a torque pulsation simulation control mode and other self-defined program control modes.

6. The multi-functional torsional vibration testing system according to claim 1, wherein The drive control module is controlled in a mode including a remote control mode, in which the drive control module receives instructions and control quantities transmitted by an upper computer through a communication network, the drive control module can simultaneously communicate with the upper computer through the communication network, and the control quantities include the frequency and amplitude of a torque pulsation control signal, and the upper computer is a control computer; A local control mode, in which the drive control module inputs instructions and control quantities through a control keyboard or a man-machine interactive interface, controls the start and stop of the drive control system, and controls whether to monitor the working condition of the drive control system through the control keyboard or the man-machine interactive interface.

7. The multi-functional torsional vibration testing system according to claim 1, wherein The load includes a crankshaft, a pulley, a generator, an air conditioner, a water pump and a fan.

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