Experimental study on pressure resistance performance of the plastic housing for the underwater robot system
The underwater housing is used to protect the electronic parts of the underwater robot system from water and pressure. The housing made of a metal material is widely used, but the weight is heavy and the price is expensive. So in recent years the housing of plastic material that is inexpensive and lightweight is being used in shallow water depth. In this paper, we have obtained the pressure resistance performance in several plastic housing specimens by the high pressure experiments. In the experiments result, we know the pressure resistance performance of the oil filled housing specimen better than other specimens.
Design of an inexpensive waterproof housing
Last year, Lake Superior State University's engineering department started a program in undergraduate research and began the task of developing a remotely operated underwater vehicle (ROV). As the students researched the different technologies available for use they became aware that very little information was available for the design of underwater housings with through-hole connectors and motor shafts. Furthermore, commercially available housings were well beyond their budget. Because of this, they set out to design a low cost housing that could be manufactured either by them or by a local business. The goal was to develop 18" aluminum housings with endcaps for under $200. Multiple housings could then be connected to create an ROV. The housings would be designed for up to 300-foot depths. The endcaps would allow for either through-hole connectors or a motor shaft depending on the application. At this time the students have designed, built and tested the housing design and are well on their way to complete the ROV. It is believed that this information would be useful for a wide variety of audiences including any educational group interested in the development of their own ROV. This paper discusses the technical aspects of the design process and provides for development of a low-cost housing. A complete schematic and bill of materials are presented.
Study on urea-modified phenol formaldehyde resin adhesive
A reasonable technology to synthesize Urea-Modified Phenol Formaldehyde resins is realized by reacting phenol,urea and formaldehyde.The resin's feasibility is explored.The experiment result of shows that storable stability of the modified resin is good.The curing temperature of PUF resins was 25 ℃,lower than that of PF resins.The curing speed of PUF resins is faster than that of PF resins at the same curing temperature.The physical properties of the birch plywood bonded with PUF resins is similar to that of the birch plywood bonded with normal PF resins.The mechanical properties of the birch plywood bonded with PUF resins can achieve the demands of GB/T9846-1988.Free formaldehyde content of plywood is lower than the E1 level set by GB18580-2001.The cost of the adhesive is lowered for the use of urea,and its comprehensive properties is better than that of PF resins.