| Ventilator has a very wide range of applications in the domain of health care. Ithas become an essential medical equipment of hospital for the clinical rescue andtreatment of acute and chronic respiratory failure or respiratory insufficiency causedby varies reasons, for it can help patients enhance breathing, relieve anoxia and theresort of carbon dioxide, and improve ventilatory function. As a core component ofbattlefield first-aid ventilator, electric air supply device plays an extremely importantrole in rescuing the badly-wounded invalid in exceptional cases.In order to address the needs of battlefield first-aid ventilator applications, thisthesis designs a new type of electric air supply device which can meet theperformance requirements of the air supply of the battlefield first-aid ventilator.Firstly, this thesis gave a comprehensive description of the research backgroundand types of the ventilator, as well as the research status and development trend ofelectric air supply device’s performance impact.Secondly, this thesis introduced the performance requirements of air supplydevice for the battlefield first-aid ventilator and then developed a reasonablestructural design of a new portable electromechanical air supply device. Meanwhile,its working principle and speed control principle was analyzed by applying breathingmachine drive motor.Subsequently, this thesis focused on two-dimensional modeling and simulationresearch of the portable breath electromechanical dynamic air supply device by takinginto account six factors, such as the size of the inner diameter, the number of blades,blade thickness, and distance from the center to the entrance, center distance inwardand outward. Furthermore, this thesis investigated the way to get the cloud andsimulation data in the fluid analysis software FLUENT using MOVING MESHmethod which changed the single variable of the influencing factors and analysisindependently. This method can be used to determine preliminarily the performance ofa new designed electric air supply device.Finally, we measured the pressure and flow-rate of the new fan and compared theobtained data to the simulation results. The analysis result shows that the newlydesigned electric air supply device meets all the performance requirements. |
