A centrifugal compressor assembly is provided. The centrifugal compressor assembly includes a scroll assembly having a suction plate defining an inlet fluid passage, a suction plate housing, a diffuser plate, and a collector. The suction plate is detachably coupled to the suction plate housing, the suction plate housing is detachably coupled to the collector, and the diffuser plate is detachably coupled to the collector. The centrifugal compressor assembly further includes an impeller rotatably mounted in the scroll assembly for compressing fluid introduced through the inlet fluid passage, and a variable geometry diffuser system.

A centrifugal compressor includes: a rotor that includes a shaft rotatably disposed inside a casing and impellers fixed to an outer periphery of the shaft; a diaphragm that surrounds the impellers from an outer peripheral side; a suction-side casing head disposed separately from the diaphragm on a side on which fluid is sucked; a temperature controlling mechanism that is provided inside the suction-side casing head and is configured to control ambient temperature through flow of a heating medium; a heat insulating body disposed between the suction-side casing head and the diaphragm; and a locking structure that locks the heat insulating body and the suction-side casing head with each other to be relatively displaceable in a radial direction.

The present disclosure relates to a light, in particular, to a light having a fly killing function that can be used for lighting and killing flies comprising at least one LED chip, a fly storage means, a negative pressure fan, a fan hanger, a ventilation net, and a power supply; wherein the fly storage means is connected to the fan hanger, the LED chip is secured to a lower end of the fly storage means, the fly storage means comprises an air inlet and a fly storage groove, the negative pressure fan is mounted onto the fan hanger above the fly storage means, a gap is provided between the blades of the negative pressure fan and an upper end of the fly storage means to allow flies to go through; the ventilation net comprises a plurality of ventilation holes having a size that is able to stop flies from passing therethrough, and the ventilation net is provided circumferentially between the outside wall of the fan hanger and the outside wall of the fly storage means, and the fan hanger, the ventilation net, and the fly storage means form a closed space except the ventilation holes and the air inlet.

A fan includes a metal plate, multiple cylindrical coils, a frame and an impeller. Multiple teeth annularly arranged and connected with each other are formed on the metal plate. Each cylindrical coil is arranged between adjacent teeth, and each end of the cylindrical coil is arranged toward corresponding tooth. The frame is arranged on a surface of the metal plate and extended along an edge of the metal plate. A flow channel and an air outlet connected to the flow channel are formed by the frame. The impeller is arranged in the flow channel. A stator structure of the fan is simplified by forming the teeth on the metal plate.

An impeller 1 according to the present invention includes a disc portion 30 fixed to a rotary shaft 101 that rotates around an axis line O, a cover portion 50 disposed to face the disc portion 30, and a plurality of blade portions 40 provided between the disc portion 30 and the cover portion 50. The impeller 1 includes a first segment SG1 configured of a first disc portion 31 that is a portion of the disc portion 30 on one side of the axis line O, a second segment SG2 in which a second disc portion 35 that is a portion of the disc portion 30 on another side of the axis line O, the cover portion 50, and the blade portions 40 are integrally configured, and a joining layer CL configured to join, by friction welding, the first segment SG1 and the second segment SG2.

Disclosed is an embodiment of a dual seal arrangement for the high-speed shaft of a supercharger with a centrifugal compressor and a mechanical speed step-down transmission to the shaft. A ring located about the shaft splits the rotational speed of the shaft between two seals, so that each seal spins at a speed of roughly half the speed of the shaft. The arrangement can also be used to split the shaft speed between two bearings in the same manner. The high-speed shaft may also have a turbine attached, to form a driven turbocharger.

A system for controlling the clearance distance between an impeller blade tip of a centrifugal compressor and a radially inner surface of an impeller shroud in a turbine engine. The system comprises a thermal driver coupled between the impeller shroud and engine casing by hinged linkages. The thermal driver includes an annular ring and annular seal which together define thermal driver cavity. Relatively warm or relatively cool air supplied to the thermal driver cavity cause expansion and contraction, respectively, of the annular ring which is translated by linkages into axially forward and aft motion, respectively.

Provided is a rotary machine including a rotating resinous impeller, a rotary shaft penetrating the impeller, and a fastening portion screwed to the rotary shaft, in which the rotary shaft includes a penetrating shaft portion facing an inner peripheral surface of the impeller, a tip shaft portion screwed to the fastening portion, and a fastening reception portion sandwiching the impeller between the fastening reception portion and the fastening portion, the penetrating shaft portion has a non-circular portion and an outline of a cross section of the non-circular portion orthogonal to a rotational axis deviates from a perfect circle about the rotational axis, and the impeller includes a connecting portion engaging with the non-circular portion.

A turbo compressor includes a driving unit including a stator and a rotor that are configured to generate a rotational force and a rotary shaft that is connected to and rotated by the rotor, an impeller connected to the rotary shaft to pressurize a suction refrigerant in the radial direction of the rotary shaft and a casing that receives the driving unit and the impeller and supports the rotary shaft. The casing includes a first shell to which the stator is fixed and that rotatably supports the rotary shaft, and a second shell that is spaced apart from the first shell and surrounds the first shell. A shell passage is defined between the first and second shells. The discharged refrigerant cools the driving unit, which improves the efficiency of the compressor.

An impeller includes a disk that has tubular first and second disk members, a blade that is integrally provided with the second disk member, and a cover that is integrally provided with the blade and covers the blade. The first disk member has a ring-shaped recessed portion therein. The second disk member has a ring-shaped engaging portion that is configured to engage with the first disk member by being inserted into the recessed portion. A first shrink-fitting portion is provided in a boundary portion between an outer circumferential surface of the engaging portion and an inner circumferential surface of the recessed portion that comes into contact with the outer circumferential surface.