The Research On Mechanism Of The Super-Frequency Hydraulic Vibrator And Static Press Bearing

The technology of hydraulic vibration is a new field in hydraulic technology, and the super-frequency hydraulic vibration is a front edge subject and is always a key in study. Due to varying in working object and medium, the delivered mode and mechanism of vibration energy of super-frequency hydraulic vibrator is different. Combining the application in pratic engineering, this paper presents the theory of super-frequency vibration and wave. The paper summarizes the current situation and the trend of the hydraulic vibrator in home and abroad systematically, and designs the super-frequency hydraulic vibrator with the frequency adjustment turn slide valve on the basis of the analysis schemes of various hydraulic vibrators and the frequency adjustment valve. According to the theoretical and systematical analysis on the mechanism, the paper confirms that it can carry out steplessly adjustable frequency and controllable amplitude and certifies that the scheme of super-frequency hydraulic vibrator with the frequency adjustment turn slide valve is feasible; in addition the paper puts forward the principle of design and the method of calculation. In order to reduce the wear and leakage between the cylinder wall and piston caused by high speed reciprocate, a static press bearing on the contacting section is designed in the super-frequency hydraulic vibrator system. The loading principles of hydraulic static press bearing, one-way valve and laser boring flow regulating valve are presented in this paper, and the calculation of examples is carried out in detail. Through the analysis and research on working characteristic of zero lap valve be equivalent with turn slide valve, a more accurate mathematics model is established using four way slide valve instead of a turn one which can accomplish the analysis of the whole dynamic system and dynamic stiffness characteristic. Analyzing the transfer function, it shows that the gain factor, natural frequency, damping ratio are key factors affecting the system performance. Using AMEsim, the valve controlled hydraulic cylinder model is created and the dynamic computer simulating research is preceded. In the simulation, changing the frequency, vibrating mass, system pressure and spring stiffness and analyzed each main system parameter to the influence of the hydraulic vibrator function, the response curves of batch of the disturbing forces, displacement, velocity and acceleration are obtained. The consistent in the simulating results and the theoretical analysis results proves that the design of super-frequency hydraulic vibrator is reasonable and practicable.