Dynamic Analysis of the X-shaped Groove Aerostatic Bearings with Disk-Spring Compensator.

Chen, Ming Fei; Lin, Yu

doi:10.1299/jsmec.45.492

Cited by 23 publications

(10 citation statements)

References 6 publications

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“…The last passive compensation solution presented herein is by Chen et al [23], who designed an Xshaped grooved bearing with an embedded disk spring damper compensator. As it is possible to see from Fig.…”

Section: Passive Compensation Methodsmentioning

confidence: 99%

A Historical Review of Gas Lubrication: From Reynolds to Active Compensations

Lentini¹,

Moradi²,

Colombo³

2018

Tribol. Ind.

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Friction and wear are tribological phenomena that have produced significant economic damage and environmental issues throughout our history. Different kinds of lubricants and coatings have been employed in the attempt of reducing friction losses. Because of their remarkable performance, gas lubricated systems are characterized by almost zero friction and wear. For this reason, they can be utilized in applications where rolling and fluid bearings cannot, e.g., metrology, medical equipment and tool machine. This paper reviews the evolution of gas lubrication through history. The topography of the subject is described from its origins to how it was shaped over the centuries, trying to preserve the logical cause and effect relationship of the events. For the sake of consistency, the review considers only the key past contributions which are strictly related to gas lubrication.

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Section: Passive Compensation Methodsmentioning

confidence: 99%

A Historical Review of Gas Lubrication: From Reynolds to Active Compensations

Lentini¹,

Moradi²,

Colombo³

2018

Tribol. Ind.

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“…In the presence of load variations, the valve makes it possible to increase the stiffness by a suitable regulation of the air supplied to the pad. Chen and Lin [12] proposed a disk-spring compensator to increase the static and dynamic performance bearing. Despite their relatively low costs and simple design, passive compensation solutions prove less effective than their active counterpart.…”

Section: Introductionmentioning

confidence: 99%

An aerostatic pad with an internal pressure control

et al. 2020

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Because of their almost zero friction and wear, aerostatic pads are widely used in applications where very precise positioning is required. However, this kind of bearing suffers from poor damping and low specific stiffness. This paper presents a new compensation strategy to increase air pad stiffness. This method exploits a custom-built pneumatic valve which can be easily integrated with any commercial pad. The design and the working principle of the proposed system are described and studied with the aid of a lumped parameter model. The effectiveness of the proposed compensation is numerically and experimentally evaluated. The results demonstrate that the solution represents a good and cost-effective method to enhance the static stiffness of aerostatic pads.

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“…Despite their limitations, the lower costs of passive compensation solutions may render them more attractive to be employed in industrial applications. Most of the current passive compensation solutions exploit low cost components such as elastic orifices [22], compliant surfaces [23], springs [24] or valves [25,26]. It has been found that designing passive compensation systems exploiting diaphragm valves can lead to significant increases in stiffness [26] and damping in a low frequency range [27].…”

Section: Introductionmentioning

confidence: 99%

On the Design of a Diaphragm Valve for Aerostatic Bearings

et al. 2020

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Because of their almost zero friction, cleanness and long life, aerostatic bearings are commonly used in many applications where high precision of positioning is required, e.g. machine tools, measuring machines, semiconductor manufacturing and power board testing. However, air bearings suffer from low relative stiffness and poor damping. Active and passive compensation are two effective methods to enhance the static and dynamic performance of these kinds of bearings. Despite their higher performance, active compensation solutions are too expensive to be used in industrial applications, as a consequence of the costs related to their controllers, actuators and sensors. This paper presents the design and performance of a passive compensation method that exploits a diaphragm valve. Thanks to its ease of integration, satisfactory performance and relatively low cost, this method could be a valuable solution to increasing the stiffness of aerostatic bearings. This work provides a procedure to design diaphragm valves depending on the type of the integrated pad and the desired nominal air gap height. Results demonstrate that, once correctly designed, the diaphragm valve makes it possible to obtain bearings with quasi-static infinite stiffness at the selected air gap height.

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Dynamic Analysis of the X-shaped Groove Aerostatic Bearings with Disk-Spring Compensator.

Cited by 23 publications

References 6 publications

A Historical Review of Gas Lubrication: From Reynolds to Active Compensations

A Historical Review of Gas Lubrication: From Reynolds to Active Compensations

An aerostatic pad with an internal pressure control

On the Design of a Diaphragm Valve for Aerostatic Bearings

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