Abstract: A structure of a fuel cell system and a controlling method thereof are provided. The structure of the fuel cell system includes a flow sensor that is configured to detect a flow of air introduced into the fuel cell system and an air compressor that is configured to compress the introduced air and has an air foil bearing to maintain minimum driving revolutions per minute or greater. Additionally, the system includes a flow adjuster that is connected to the fuel cell system. Accordingly, since an amount of air corresponding to a required amount of air of the fuel cell system is supplied by limiting or recirculating an excessive air supply while securing durability and durability of abrasion of the air compressor to which the air foil bearing is applied, a dry phenomenon of the fuel cell system including a stack due to the excessive supply of air is prevented.

Abstract: The present disclosure relates to an improved air foil thrust bearing having a reduced number of components and an increased load support area. The improved air foil thrust bearing comprises a base plate and a plurality of foils attached to the base plate, wherein each of the foils comprises a top foil section and a bump foil section connected to and integral with the top foil section.

Abstract: A thrust bearing includes: a thrust plate in a disc shape having an outer diameter and an inner diameter formed by perforating a central portion of the thrust plate; a plurality of bump foils disposed radially on a top surface of the thrust plate; a plurality of top foils in a panel shape covering each of the bump foils, where bottom surfaces of the top foils are in contact with upper ends of the bump foils; and metal blocks radially disposed on the top surface of the thrust plate and formed to be spaced apart from the bump foils. The thrust bearing can be included in an air compressor of a vehicle.

Abstract: A thrust bearing includes: a thrust plate in a disc shape having an outer diameter and an inner diameter formed by perforating a central portion of the thrust plate; a plurality of bump foils disposed radially on a top surface of the thrust plate; a plurality of top foils in a panel shape covering each of the bump foils, where bottom surfaces of the top foils are in contact with upper ends of the bump foils; and metal blocks radially disposed on the top surface of the thrust plate and formed to be spaced apart from the bump foils. The thrust bearing can be included in an air compressor of a vehicle.

Abstract: A structure of a fuel cell system and a controlling method thereof are provided. The structure of the fuel cell system includes a flow sensor that is configured to detect a flow of air introduced into the fuel cell system and an air compressor that is configured to compress the introduced air and has an air foil bearing to maintain minimum driving revolutions per minute or greater. Additionally, the system includes a flow adjuster that is connected to the fuel cell system. Accordingly, since an amount of air corresponding to a required amount of air of the fuel cell system is supplied by limiting or recirculating an excessive air supply while securing durability and durability of abrasion of the air compressor to which the air foil bearing is applied, a dry phenomenon of the fuel cell system including a stack due to the excessive supply of air is prevented.

Abstract: An air supply apparatus and method for a fuel cell, which supplies high-pressure air while avoiding a surge phenomenon of a turbo type compressor in a fuel cell system to which the turbo type compressor is applied is provided. In particular, a portion of air from an outlet of a compressor to an inlet of the compressor is recirculated to the supply of air supplied from the compressor to a stack. This recirculated air and external air introduced from the outside are mixed and supplied to the inlet of the compressor at a sufficiently high air pressure, allowing the compressor to avoid a surge region and enabling the supply of air with a high pressure and a low flow rate.

Abstract: A fuel cell system includes an enclosure having a fuel cell stack producing electricity via an electrochemical reaction between high temperature and high pressure compressed air generated by an air compressor and hydrogen used as fuel. A portion of the compressed air from the air compressor is introduced into the enclosure through a first pipe, and the compressed air flows towards the air compressor from the enclosure through a second pipe. The compressed air introduced into the enclosure via the first pipe removes moisture and hydrogen leaking out of the fuel cell stack and returns to the air compressor via the second pipe.