National Repository of Grey Literature 2 records found  Search took 0.01 seconds. 
Safety valve for presses
Macků, Ondřej ; Vostřel, Josef (referee) ; Škopán, Miroslav (advisor)
This diploma thesis deals with the design of the safety pneumatic valve. This valve is a part of the two-handed control system device which is used with mechanical press. Operational calculation of important parts and strength control of the most stressed construction part is done in this paper. Further the calculation defining leaking of compressed air from one of the chamber of valve is presented. The result of this calculation is the time dependence of the chambre pressure. Partial drawing documentation which contains production drawings of the main parts of valve and the drawing of the assembly is a part of the appendix.
Optimization of ultrasonic leak detector of pneumatic system
Macků, Ondřej ; Mazal, Pavel (referee) ; Vlašic, František (advisor)
The thesis deals with design and optimization of exchangeable modules for localization of air distributable ultrasound in concept of ultrasound probe design. Several series of these modules were manufactured using the technology of rapid prototyping and tested on artificially created source of air leak. Based on these verification experiments two types covering wide use for identification of pneumatic systems leaks were selected and modified. These two types are long range module for more accurate and expended reach of the leak detection and focusing attachment for narrowing the received range of scanning module and elimination of surrounding ultrasound. Part of the thesis is also analysis of the acoustic signal processed by modern acoustic emission analysers which allow besides standard parameters recording also continuous sampling up to 10 MHz and design solution for attachment of add-on modules to the detector. The thesis is beneficial for raising awareness of leak measurements, prototype manufacturing by using the 3D printing and designing and manufacturing of modules.