Characteristics of contactless swirl vane gripper by investigating the negative pressure and clearance

Kumar, Sandeep; Karthick, P.; Boovendravarman, S.; Raghul, Ks.; Thiyagu, S.

doi:10.1016/j.matpr.2020.04.044

Cited by 3 publications

(1 citation statement)

References 8 publications

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“…In general, with a body diameter of up to 100 mm at 258 L/min air consumption, commercial vortex modules can provide a grip force of 44 N. The Bernoulli module provides a grip force up to 14 N for a maximum outer diameter of 150 mm at 291 L/min air consumption instead of providing smooth gripping operation [ 12 ]. As the maximum grip force that can be achieved in a non-contact environment is limited due to the availability of only one module specification, researchers have focused on finding the optimal shape design that allows more control over the flow behavior inside the module [ 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 ]. Their results significantly improved the air head’s internal structure and created an efficient vacuum on the workpiece.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Non-Contact Grip Force and Swirl Stability by a Combined Venturi–Vortex Air Head

2021

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A combination of the venturi module and the vortex cup was proposed to solve vortex instability and to enhance grip capacity. Mounting a venturi suction pad inside the vortex cup improved vacuum generation efficiency. When the vortex cup properly maintained the non-contact air gap and generated an equivalent vacuum to achieve a sealing effect around the open gap of the suction pad, the combined head improved grip capacity and stabilized the non-contact environment. Furthermore, the flow patterns around the venturi chamber and the swirl inside the vortex cup were analyzed based on the design elements of each module. In a module that integrated some of the venturi’s features internally, increased air consumption of the vortex cup was required than that of the venturi. However, it supported a wide range of non-contact grips. The coupled model effectively protected the vacuum suction features of the venturi suction pad in all non-contact environments in that range.

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