Abstract: According to the present disclosure, at least two fluid inlet/outlet pipes, each of which is provided with a filter, are installed outside a structure to be bent and an end of each of the fluid inlet/outlet pipes is connected to a pressure sensor provided on the structure. Thus, since a fluid in the state in which low-frequency and high-frequency components of the disturbances generated outside the structure are removed therefrom acts on the pressure sensor, the underwater pressure sensing apparatus is capable of measuring fluid pressure in a stable state.

Abstract: According to the present disclosure, at least two fluid inlet/outlet pipes, each of which is provided with a filter, are installed outside a structure to be bent and an end of each of the fluid inlet/outlet pipes is connected to a pressure sensor provided on the structure. Thus, since a fluid in the state in which low-frequency and high-frequency components of the disturbances generated outside the structure are removed therefrom acts on the pressure sensor, the underwater pressure sensing apparatus is capable of measuring fluid pressure in a stable state.

Abstract: A rotary compressor including a cylinder to form a compression chamber, and including a vane slot including a vane guide part recessed outward from an inner surface of the compression chamber and an extended part having a width wider than the width of the vane guide part by a predetermined extension width in an outer end area of the vane guide part, a roller to eccentrically rotate in the compression chamber and to compress a medium, a vane reciprocatingly accommodated in the vane slot, and contacted to an outer surface of the roller to divide the compression chamber, and a filling member accommodated in a space of the extension width in the extended part.

Abstract: A rotary compressor including a cylinder to form a compression chamber, and including a vane slot including a vane guide part recessed outward from an inner surface of the compression chamber and an extended part having a width wider than the width of the vane guide part by a predetermined extension width in an outer end area of the vane guide part, a roller to eccentrically rotate in the compression chamber and to compress a medium, a vane reciprocatingly accommodated in the vane slot, and contacted to an outer surface of the roller to divide the compression chamber, and a filling member accommodated in a space of the extension width in the extended part.

Abstract: A variable capacity rotary compressor includes a housing having a compressing chamber, a roller to rotate in the compressing chamber while coming into contact with an inner peripheral surface of the compressing chamber, a vane to move forward and rearward along a guiding groove in accordance with rotation of the roller, the guiding groove being formed in the housing in a radial direction of the compressing chamber, a vane control device to regulate restriction and release of the vane as to whether or not the vane comes into continuous contact with an outer peripheral surface of the roller, and a controller to output a control signal to the vane control device for the variation of a compression capacity, so as to regulate a proportion of restriction and release of the vane, and a capacity variation method using the variable capacity rotary compressor.

Abstract: A rotary compressor is disclosed. The compressor reduces frictional loss in a contact part between the rolling piston and the eccentric sheave and in contact parts between the crankshaft and the main and sub bearings by achieving smooth lubrication to the contact parts. In the compressor, a lubricating groove is formed on the outer surface of the eccentric sheave. A hole communicating with the internal oil conduit of the crankshaft is formed in the lubricating groove and supplies oil from the oil conduit to the outer surface of the sheave. Lubricating grooves are also formed on the inner surfaces of the main and sub bearings so as to facilitate oil supply for the contact parts between the crankshaft and the bearings.