Abstract
To measure the distance and direction between the flanges of two seabed pipelines, a measuring device for pulling a rope in seawater was designed. Addressing the sealing problem of the key equipment the rotating shaft of the rope winch, we used the magnetic coupling principle to transfer the driving moment, and converted the dynamic seal into a static seal structure to reliably seal the motor. Through an experiment measuring two pipelines with the underwater rope pulling device, we verified that the measuring accuracy of the device meets the design requirements, and confirmed the feasibility of applying magnetic coupling technology in winches.
Highlights
As the depth of marine development increases, connections of two pipelines on the seafloor are required for the development of deep-sea oil and gas resources
This paper presents a new type of underwater winch structure based on magnetic coupling technology
Based on the design of a measuring system that measures the distance and direction of two pipelines 1500 m deep in water, a pulling rope winch was designed
Summary
As the depth of marine development increases, connections of two pipelines on the seafloor are required for the development of deep-sea oil and gas resources. The torpedo could bear a pressure of 4.5 MPa with a maximum speed of 3200 rpm [6] This method has been successfully applied in the China CR 01 6000 m underwater robot. O-ring seals withstand rotational pressure than 1.5 MPa withstarting a line speed of the rotating shaft can of 3.5 m/s. This type of dynamic seal60method and a line speed of the rotating shaft within [11] This type of dynamic seal method experiences abrasion. Mechanical seals can be applied under a maximum pressure ofis pressure of 45 MPa and a line speed of 100 m/s These seals have a complex structure and the cost. When magnetic fluid is used to seal the liquid, its durability decreases to some extent due to diffusion, to diffusion, especially in deep-water environments [14].
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