Tire Recycling Plant granulates waste tires into rubber powder of 40-150 mesh, and separate steel, fiber and nylon completely at normal temperature, without pollution.
Tyre Recycling Line is environmental protection and energy saving, and market prospect broadness.
We would design the Tyre Recycling Production Line as customer's different requests.
SUMAC has exported Tire Rubber Recycling Plant to India, Georgia and other countries. If you are interested in tire recycling machines, pls feel free to contact us!
Tire Recycling Plant,Tyre Recycling Line,Tyre Recycling Production Line,Tire Rubber Recycling Plant SUMAC AUTO RECYCLING EQUIPMENT CO., LTD , https://www.autorecyclingchina.com
1 principle demonstration simulation software main function module The main function of this part is to visually demonstrate the working principle of ultrasonic motor. There are mainly traveling wave demonstrations in the stator, demonstration of the elliptical motion trajectory of the stator tooth surface, and demonstration of the driving and power output mechanism of the ultrasonic motor, so as to have an intuitive understanding of the working principle of the ultrasonic motor. In addition, it can also simulate the distortion of traveling wave and elliptical motion generated in various non-ideal situations (such as two-phase amplitude unequal, or phase difference not equal to 9tb, etc.).
2 parameter setting fund project: National Natural Science Foundation of China (50235010) The main function of this part is to input various parameters of ultrasonic motor A-wave ultrasonic motor performance analysis and optimization design value (mainly stator, friction layer and pressure) The material property parameters, geometric dimension parameters and other parameters of the pre-stress, modal order, etc. of the electric ceramic are used for subsequent performance prediction or simulation parameter analysis of the ultrasonic motor.
2.3 Performance prediction This part can calculate the transient response of the ultrasonic motor under the input alternating voltage excitation of a given amplitude according to the various parameters of the ultrasonic motor (such as starting and closing characteristics, overshoot and stability). Amplitude, etc.), can also calculate the motor speed corresponding to different load moments under a given pre-pressure, that is, the load characteristic curve of the ultrasonic motor. The main function of this module is to predict the output characteristics of the ultrasonic motor in the design stage, in order to check whether the design prototype can achieve the expected performance.
2.4 Parameter Analysis In order to evaluate the dynamic characteristics of the ultrasonic motor, we propose the following indicators: the natural frequency of the bending vibration of each step of the stator; the modal mass and modal stiffness corresponding to the bending modes of each order; the stator based on the piezoelectric ceramic excitation Response displacement, vertical vibration velocity amplitude and corresponding tangential rotational speed of the rotor.
Force coefficient and electromechanical coupling coefficient based on piezoelectric ceramic excitation; equivalent capacitance and equivalent inductance in piezoelectric ceramic/elastomer composite stator vibrating body equivalent circuit.
Piezoelectric ceramics correspond to the clamping capacitance of each order bending mode.
These dynamic characteristics description indicators contain both mechanical and corresponding electrical characteristics, and more concentratedly reflect the dynamic characteristics of the ultrasonic motor. In particular, the electrical characteristic index has been obtained only after the ultrasonic motor is manufactured and measured by the equivalent circuit principle, and this paper can be directly calculated, which provides the predictability of the ultrasonic motor and can pass very effectively. An example of simulation results for the modal-order analysis of the stator dynamic characteristic index using the software.
Optimization design principle of 3-row wave ultrasonic motor The design of ultrasonic motor involves the determination of many parameters. Each parameter has more or less influence on the dynamic index of ultrasonic motor. When designing and selecting parameters for ultrasonic motor Based on the following principles: Ultrasonic motor performance prediction and parameter analysis program flow The parameter analysis example of the stator's dynamic characteristic index has other additional conditions, such as maximum speed, stall torque, sensitivity to external load changes (load characteristics). Soft and hard) and so on, even the size (outer diameter, thickness), weight, etc., in some special occasions such as aerospace, precision instruments, MEMS, etc., sometimes these must become strictly adhered to Qualifications. Therefore, at the beginning of the design of the ultrasonic motor, the most important design requirements should be clarified first.
In this paper, the no-load speed and the stall torque of the ultrasonic motor are two important design indicators. According to the characteristics of the ultrasonic motor load characteristic curve, after determining the two indexes, the load characteristics of the ultrasonic motor are roughly determined. Another design indicator is the diameter of the stator. The stator diameter has a certain relationship with the no-load speed and the stall torque. After determining the no-load speed and the stall torque, the diameter of the stator also has a general range.
For the standardization of product design, it is generally necessary to pre-select a relatively regular value.
It is determined that the design parameters closely related to the design index are directly related to the no-load speed. The operating modes (wavenumber, frequency), amplitude, stator diameter, tooth height, etc. of the ultrasonic motor are closely related to the stall torque. Material, coefficient of friction and pre-pressure.
The design requirements of an ultrasonic motor are generally its rated output power, that is, a certain torque is output at a certain speed. In addition, the overall optimization goal of the ultrasonic motor is of course to achieve the highest efficiency while meeting the design requirements. However, it should be noted that the local optimization objectives of each functional module should be clarified, and the interaction between the modules should be considered as much as possible. This is especially important where the overall mathematical model of the ultrasonic motor is not perfect.
The parameter range is initially selected, the variable parameter analysis is carried out, the optimization parameters are analyzed and determined, and the performance prediction is performed according to the simulation model.
Adjust the parameters to get the optimal solution.
According to the module division of the ultrasonic motor power system, in order to obtain good dynamic characteristics of the ultrasonic motor, the stator resonance module and the friction drive module are optimized, that is, the stator and the friction interface are designed.
The main function of the stator of the ultrasonic motor is to generate resonance under the excitation of the piezoelectric ceramic induced strain, thereby effectively converting electrical energy into mechanical energy and storing it in the form of vibration energy. Therefore, the key to the optimal design of the stator is to ensure the maximum conversion of the electromechanical coupling energy within the range of parameters that can be selected under the premise of meeting the design requirements. For this reason, the modal, material, size and piezoelectric ceramics of the stator should be used. Several aspects have been considered. The design of the friction interface mainly includes two aspects, one is the choice of friction material, and the other is the size of the friction layer and the selection of the pre-pressure.
In this paper, the damping loss, electromechanical coupling coefficient and vibration velocity of stator vibration (implicit amplitude and pre-pressure) are used as evaluation indexes. The three are combined as the target of stator optimization design; the power loss of friction interface is optimized as friction interface. The goal of the design. Mainly to achieve better efficiency and friction drive performance in meeting the requirements of use.
The design example and performance analysis of the 4-line wave ultrasonic motor are shown in the stator and its working mode of the ultrasonic motor applied to the air valve developed by the China Southern Ultrasonic Motor Research Center. The parameters are shown in the following table. .
545 type air valve ultrasonic motor stator structure and working mode 545 type air valve ultrasonic motor stator structure parameter table outer diameter working mode inner diameter working frequency stator base thick stator material steel tooth high voltage electric ceramic piezoelectric ceramic thick The prediction results of the no-load speed and the stalling torque under different pre-pressures are shown as the change curves of the output power, sliding loss power and friction interface efficiency of the ultrasonic motor friction interface under different pre-pressures. There are many charts for the optimization design details obtained by this design program. Due to space limitations, they are not listed here. For details, please refer to the analysis of the parameters of the ultrasonic motor. It is found that the B7 mode is more appropriate. The frequency of the working mode is 36. The amplitude (when no pre-pressure is applied) is 2Lm, and the electromechanical coupling coefficient and each evaluation index are relatively high. Through the analysis of its output characteristics, it is found that the pre-pressure can be selected as 100N. At this time, the stall torque is 0. 16Nm, the no-load speed is 140r/min, and the corresponding spacing D is slightly smaller than zero, which can ensure good contact of the stator and rotor. Without causing a large friction loss, the working point can be selected at a load torque of 0.1 Nm and a rotational speed of 90 r/min. At this time, the transmission efficiency of the friction interface can be the idling speed of the 545 type air valve ultrasonic motor and the blocking torque with the pre-pressure. The variation of the ultrasonic motor friction interface under different pre-pressure characteristics 5 Conclusion The ultrasonic motor performance simulation analysis software was compiled to predict the output characteristics of the ultrasonic motor at the design stage.
The dynamic characteristics description index of the ultrasonic motor is defined, and the variable parameter simulation analysis is performed, and the trend and sensitivity of each index with the parameter can be calculated.
Several theoretical principles for optimal design of ultrasonic motor are proposed. Based on the simulation results of dynamic characteristics, the basic methods for optimal design of stator dynamic characteristics and friction interface transmission characteristics are given. Constructive suggestions are put forward for the optimization of design parameters.
The ultrasonic motor dynamic simulation research has played a very good guiding role in the optimization design. The ultrasonic motor performance simulation analysis software developed in this paper has played an auxiliary analysis and design role in the research and development of the rotating traveling wave ultrasonic motor, and its effect is very remarkable.
