Force characteristics and two-dimensional pressure fields of air flotation units with different numbers and distribution radii of orifices

Yu, Xubo; Zou, Chengye; Shi, Kaige; Li, Xin

doi:10.1177/0954406219875761

Cited by 3 publications

(3 citation statements)

References 21 publications

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“…Chen X et al [5][6] proposed a non-contact air-film system with directional porous cushion, and studied the basic characteristics of pressure distribution and viscous force of air-film. Yu X et al [7][8] dominant pressure distribution considering the inclination angle and center height of inclined airflow film. The pressure field of inclined airflow film with different inclination angles and center height was experimentally measured, and the results were in good agreement with the theoretical results.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on the Influence of Air Conveyor System Parameters on Vibration of Glass Substrate

Ma,

Huang,

et al. 2024

AETR

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In this paper, the method of experimental research is used to minimize the micro-vibration amplitude of 0.6 mm thick glass substrates in the air conveyor system. The optimal parameter combination of the small orifice throttling glass substrate air conveyor system is obtained as follows: orifice diameter 0.25 mm, orifice spacing 60 mm and air-film thickness 50 μm. Secondly, based on the orthogonal experimental data, the influence of the main parameters of the air conveyor system at the micro vibration of the glass substrate is analyzed by variance analysis technology. The results show that the three principal parameters of the air conveyor system have significant influence on the vibration of the glass substrate. Among them, the thickness of the air-film has the greatest influence on the vibration of the glass substrate, the diameter of the orifice has the second influence, and the spacing of the orifice has the least influence. Finally, the influence of the three key parameters of orifice diameter, orifice spacing and film thickness on the micro vibration of glass substrate in the orifice throttling air flotation support system was studied and discussed, and the relationship curves between the maximum amplitude of micro-vibration of glass substrate and the main parameters of air flotation system were obtained.

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Section: Introductionmentioning

confidence: 99%

Experimental Study on the Influence of Air Conveyor System Parameters on Vibration of Glass Substrate

Ma,

Huang,

et al. 2024

AETR

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“…The Reynolds equation is used to model the air flow in the laminar flow region. 27 The mass flow conservation and the depression recovery factor [28][29][30] and the airflow characteristics in different regions can be coupled by using the pressure loss coefficient in the entrance. This model is used to predict the pressure distribution and the static characteristics of the bearings.…”

Section: Introductionmentioning

confidence: 99%

“…The air flow in the pressure depression region is modelled by coupling the inertial and viscous effects. The Reynolds equation is used to model the air flow in the laminar flow region 27 . The mass flow conservation and the depression recovery factor 28–30 and the airflow characteristics in different regions can be coupled by using the pressure loss coefficient in the entrance.…”

Section: Introductionmentioning

confidence: 99%

Novelfull‐regionmodel of inherent orifice aerostatic bearings considering air flow in orifice and clearance

Zhang

Wang

et al. 2022

Lubrication Science

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The performance of inherent orifice‐restricted aerostatic bearings (IORABs) is directly determined by the coupling of air flow in the orifice and clearance. This paper presents a novel full‐region model to analyse the performance of IORABs. The air flowing in the orifice is treated to be adiabatic. The air flow in the pressure depression region of the clearance, which is the key factor influencing the bearing performance, including inertial and viscous terms, is modelled. The Reynolds equation is used to simulate the air flow in the laminar flow region of the clearance. By using this model, the pressure distribution, including the pressure depression characteristics, could be accurately predicted and achieved substantial agreement with the experimental results. The predicted load capacity is accorded well with the published experimental data without relying on the discharge coefficients. The airflow characteristics in the orifice are crucial in determining the bearing performance and directly influenced by the orifice inner surface shape (OISS). Therefore, the pressure distribution and the static characteristics of the bearings with coupling different OISS are also systematically analysed by using this model. Narrowing and widening OISS influence the pressure depression region and the pressure value of the turning point to directly influence the static characteristics of the bearings. The full‐region model and the results are significantly for guiding the precisely calculating and designing the IORABs.

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Experimental investigation and theoretical modeling on Bernoulli gripper using water for supply power enhancement

Li,

Cao,

2024

Physics of Fluids

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Bernoulli gripper is a fluid-driven vacuum suction device, widely used in automated production lines, with suction force regarded as its key mechanical indicator. Previous design methods for optimizing the structure and parameters showed very limited enhancement in suction force due to the compressibility of air, which limits the supply pressure and supply power. Therefore, this study proposes an innovative design for replacing the fluid medium from compressible gas to incompressible liquid (e.g., water). It was experimentally validated that the gripper using water can increase the supply power several times and the suction force dozens of times compared with that using air. Then, the pressure distribution and flow field of the gripper were investigated experimentally, implying that the flow field exists in the water-film zone and the bubble zone, with radial lines of water flow of equal cross section formed in the bubble zone. Furthermore, a model of pressure distribution was established, including the water-film zone, the bubble zone, and the boundary between the two. The theoretical results were basically consistent with the experimental results. This study provides an innovative idea, theoretical model, and experimental data for the optimal design and application of the Bernoulli gripper.

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Force characteristics and two-dimensional pressure fields of air flotation units with different numbers and distribution radii of orifices

Cited by 3 publications

References 21 publications

Experimental Study on the Influence of Air Conveyor System Parameters on Vibration of Glass Substrate

Experimental Study on the Influence of Air Conveyor System Parameters on Vibration of Glass Substrate

Novelfull‐regionmodel of inherent orifice aerostatic bearings considering air flow in orifice and clearance

Experimental investigation and theoretical modeling on Bernoulli gripper using water for supply power enhancement

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