Rapid Response To Low Consumption Air Vacuum Integrated Components

Pneumatic vacuum system which adopts vacuum generator to generate vacuum has been increasingly widely applied in industry automation market for its unique advantages. However, there exists the contradiction of response time and air consumption in most of this kind of pneumatic vacuum systems. At present a separated, double-nozzle vacuum system has been developed and dissolved the contradiction. Whereas this vacuum system still has the problems such as more complicated structure, larger dimension, lower reliability and higher cost. In another word, the research of a new quick-response, low air consumption, vacuum integrated component is highly appreciated for its practical sense and application value, enabling a simple structure, miniaturization, integratilization and cost-efficiency.A new quick-response, low air consumption vacuum integrated component has been developed, utilizing the diaphragm to detect the vacuum feedback signal then control the switching. The research consists of the following contents:(1) Aiming at the practice requirement of quick-response, high volume flow switching, a new switching control valve has been researched and developed. This low-pressure and high-sensitivity control valve utilizes diaphragm to detect vacuum feedback and adopts the separate design of pilot valve and main valve, enjoying the quick response, and high reliability switching control of high volume flow.(2) To analyze the system performance and optimize the structure parameters, a pneumatic control dynamic model of pilot valve and main valve switching control was built. Though simulation the working process of the system was analyzed, which making a foundation for continuous experimentations and choosing better structure parameters of switching control valve.(3) Foundational performance test of switching control valve has been done for the deep research of switching control valve's performance. The test result indicates that the switching control valve can realize the switching from high volume flow to low volume flow reliably. Meanwhile, the structure parameters of pilot part were proved to be the main factors that can affect the system performance.(4) The integration research of the quick-response, low air consumption vacuum integrated component has been completed, and meanwhile the main performance index have been analyzed and compared through experimentations. The research indicates that if the supply pressure is 0.45MPa, compared with single-nozzle vacuum system, the response time of quick-response, low air consumption vacuum integrated component is shortened by 27% and the air consumption is reduced by 16.1%. Along with time going, the air consumption of the quick-response, low air consumption vacuum integrated component is obviously decreased. Therefore this vacuum integrated component is highlighted for its quick-response and low air consumption.