Abstract
The positional accuracy of disc storing mechanism for benthic drill is the guarantee of long hole coring in deep sea. Aiming the lack of positional accuracy analysis on disc storing mechanism, the mathematic model of the positional accuracy for disc storing mechanism is presented by using complex vector and matrix analyzing method. The analytical formula of crank rotation positional accuracy is acquired through rotation positional analysis of crank in disc storing mechanism driven by hydraulic cylinder. Adopting numerical nonlinear iteration solution method of Newton-Simpson, the variation rule of rotation positional error for disc storing mechanism to cylinder length is acquired, which supports an important theory, leading to tolerance design for dimensional parameters of disc storing mechanism.
Highlights
Benthic drill coring technology is currently the most potential marine resources exploration technology
The mathematic model of the positional accuracy for disc storing mechanism is presented by using complex vector and matrix analyzing method
Increasing the cylinder length Δl2 and setting at 5.43 mm, the positional error on each position is shown in Table 1, and the curve of positional error to cylinder length changes is shown as Fig. (4)
Summary
Benthic drill coring technology is currently the most potential marine resources exploration technology. In order to ensure the working reliability of disc storing mechanism, the positional accuracy analysis of the disc storing mechanism is absolutely necessary, which supply a great value to efficient completion of multiple core sampling, and a guarantee to deeper sea exploration. 1874-155X/14 positional accuracy analysis of disc storing mechanism driven by hydraulic cylinder has not been studied yet. In order to get the variation rule of rotation positional error for disc storing mechanism to cylinder length, the simulation using the model is done. These supply a lead to tolerance design for dimensional parameters of disc storing mechanism
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