Abstract:
This disclosure describes improvements that can expand the operating envelope of a compressor device. These improvements implement devices that vary flow parameters of a working fluid at the exit of the compressor device. In one embodiment, the device utilizes a nozzle that installs into the discharge opening on a volute of a centrifugal compressor. Actuation of the nozzle modifies a flow area through which the working fluid exits the centrifugal compressor. The change in the flow area increases the velocity of the working fluid, without the need to change the operating speed and/or other operating parameters of the centrifugal compressor.
Abstract:
This disclosure describes new construction for rotary elements that find use in compressor devices, e.g., centrifugal compressors and blowers. This construction utilizes composite materials (e.g., carbon fiber composites) that require less machine time and reduce the weight of the rotary element, while meeting the operational characteristics of compressor devices for use in a wide range of industrial applications. In one embodiment, the rotary element has a bi-furcated material design, which uses a first material (e.g., carbon fiber) to form blades and other features of an impeller and a second material (e.g., metal) to form a sleeve with properties that can securely affix the impeller to a drive shaft of the compressor device.
Abstract:
This disclosure describes new construction for rotary elements that find use in rotary displacement devices, e.g., positive displacement pumps and meters. The proposed construction may incorporate fibers, e.g., carbon fibers, disposed in a resin matrix. This construction can reduce the need to perform secondary processes that are necessary to utilize many rotary elements of conventional design. Moreover, examples of the rotary elements can improve operation of the displacement devices, e.g., by reducing resonance and allowing the displacement device to operate at increased speed.
Abstract:
Embodiments of a system and method can modify the position of diffuser vanes to improve performance of a compressor device, e.g., a centrifugal compressor. These embodiments include a feedback loop to manage the position of the diffuser vanes relative to one or more operating characteristics of an actuator that imparts movement to the diffuser vanes. In one embodiment, the system and method measure the operating characteristic for the actuator with the diffuser vanes at a first position and a second position. The system can compare values for the operating characteristics, wherein changes in the operating characteristic can identify other positions for the diffuser vanes to reduce input power the actuator consumes to move and/or maintain the position of the diffuser vanes. This feature can correlate with optimal performance of the compressor device and with peak compressor efficiency within the entire operating envelope of the compressor device.