Abstract
Vibration control is important in maintaining the silence of the underwater vehicle. Among the many methods of vibration control, isolation is by far the most efficient approach. However, as one of the major vibration sources in underwater vehicle, the vibration isolation of the sea-water pump has not been well explored. The sea-water pipe is the primary vibration transmit path from the sea-water pump to the housing. In order to realize the vibration isolation of the sea-water pump, the sea-water pipe must have certain flexibility and damping. In this study, scaled model tests were carried out to investigate the isolation effectiveness of flexible pipes in isolated sea-water pump. Specifically, three types of flexible pipes, i.e., double layer metal bellows (DLMB), rubber pipes (RP) and bellows coated rubber (BCR) were designed and tested. Tests were carried out under the operation rotate speeds of the sea-water pump. Our results show that compared with single layer metal bellows (SLMB), the isolation effectiveness of DLMB and BCR were significant and stable in high frequency regions. The optimal pipe can be chosen for different vibration reduction requirements in practical engineering.
Highlights
Thermodynamic underwater vehicle power system includes the main engine and multiple auxiliary engines
There are two basic directions to decrease the impact of the sea-water pump generated vibration for the whole vehicle in practical engineering, the first is reducing the vibration of the pump itself, e.g., reduce rotting speed and the optimized structural form
To promote the structural damping of double layer metal bellows (DLMB), a bellows coated rubber (BCR) was formed after a layer of rubber was covered on the outer surface of the double-layer
Summary
Thermodynamic underwater vehicle power system includes the main engine and multiple auxiliary engines. The vibration reduction design of the sea-water pipe is of great importance housing during operation. The vibration reduction design of the sea-water pipe is of great for the silence of underwater vehicle. Due to its good vibration isolation and impact resistance, the flexible pipe transmission of mechanical vibration energy of the power equipment to the housing. Besides the can effectively isolate the transmission of mechanical vibration energy of the power equipment to the function of vibration reduction, the advantage of flexible pipes includes the role of displacement housing. Path from the sea-water pump to the housing, the design of flexible pipe is much more significant. As the primary transfer path from the sea-water pump to the housing, the design of flexible pipe is for the vibration reduction of the housing.
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