Development of a single-shot linear actuator for a deep-sea sampling valve

Abstract

In this article, a new kind of linear actuator for the deep-sea sampling valve has been described. Based on the working principle of the triggering ring, the actuator employs a preloaded spring to generate an output force and linear movement. The actuator is designed to be used 4000 m underwater and can produce a force of 510 N at the maximal output displacement of 3.5 mm, which can be easily modified by changing the preloaded spring and spring seats. The actuator has been successfully tested to actuate the sampling valve at an ambient pressure of 40 MPa.

Development of an electric control gas-tight sampler for seafloor hydrothermal fluids

“…According to the characteristics and working principle of the sampling valve, a single-shot linear actuator is designed (Wu et al, 2009). As shown in Fig.…”

“…Consequently, the load capacity of the triggering ring is dramatically improved. For more information about this actuator, please refer to Wu et al (2009).…”

“…The sampler is designed to work at the seafloor with a maximum depth of 4000 m. Wu et al (2009) demonstrated that the sampling valve, actuator, and …”