Abstract: A pump system includes a triple-gear pump which pressurizes a fluid using three gears; an outlet flow path which guides the fluid from a first pressure-increasing portion to an outlet; a first flow path which guides the fluid from the first pressure-increasing portion to a second pressure-increasing portion; a second flow path which guides the fluid from the second pressure-increasing portion to the outlet flow path; a third flow path connected to the first flow path and the second flow path; a first valve device provided in the first flow path; a second valve device provided in the second flow path, and a control device which controls the first valve device. When the first pressure-increasing portion and the second pressure-increasing portion are switched from a parallel state to a series state, the control device causes the first valve device to open after the second valve device is closed.

Abstract: A steam turbine includes a rotor shaft, a casing disposed so as to cover the rotor shaft and having a shaft penetration part through which the rotor shaft passes, and a casing support extending axially toward an inner side of the casing through an outer surface of the casing at a periphery of the shaft penetration part and supporting the casing.

Abstract: A device for processing of a liquid that includes a device-input for receiving the liquid to be processed at an input-pressure, a device-output for returning the processed liquid at an output-pressure, and a process chamber having a chamber-inlet and a chamber-outlet, and a feed-line for connecting the chamber-inlet to the device-input. The feed-line includes a multi-stage pump for increasing the pressure of the liquid from the input-pressure to a feed-pressure at the chamber-inlet, a discharge-line for connecting the chamber-outlet to the device-output which discharge-line includes back-pressure means adapted to maintain a discharge-pressure at the chamber-outlet upstream of the back-pressure means at an excess-pressure above the output-pressure, and to reduce the pressure of the liquid from the discharge-pressure to the output-pressure downstream of the back-pressure means. The pump in the feed-line is a first stage of a multiple-stage gear pump.

Abstract: A multi-stage dry pump includes: a plurality of pump chambers each including a cylinder and a rotor housed in the cylinder; a first rotor shaft that is a rotation shaft of the rotors; a fixed bearing that rotatably supports the first rotor shaft and restricts a movement thereof along an axis direction of the first rotor shaft; and a free bearing that rotatably supports the first rotor shaft and permits a movement thereof along the axis direction of the first rotor shaft; wherein: the plurality of pump chambers is disposed between the fixed bearing and the free bearing; and a first pump chamber of the plurality of pump chambers which has a lower pressure and on the aspiration side is placed in proximity to the fixed bearing.

Abstract: A multi-staged screw compressor system includes a gearbox, a drive gear located in the gearbox, and a first, second and third screw compressor that are fastened to the gearbox and coupled to the drive gear such that the first, second, and third screw compressors are all driven in common by the drive gear. During operation the first screw compressor compresses a flow of gaseous fluid from an inlet pressure to a first intermediate pressure, the second screw compressor compresses the flow of fluid from the first intermediate pressure to a second intermediate pressure, and the third screw compressor compresses the flow of fluid from the second intermediate pressure to a final pressure. The final pressure is at least thirty times the inlet pressure.

Abstract: A multistage vacuum pump includes a stator housing a multistage rotor assembly, each stage having intermeshing Roots rotor components, wherein the tip radius of the rotor components at an inlet stage of the pump is larger than the tip radius of the rotor components at an exhaust stage of the pump, wherein a meshing clearance between the rotor components at the inlet stage of the pump is greater than a meshing clearance between the rotor components at the exhaust stage of the pump.

Abstract: A three-gear type gear pump or double gear pump wherein the first driven gear and the second driven gear are opposed to one another with the driving gear disposed between them, wherein the number of teeth of the driving gear is greater than the number of teeth of each of the first driven gear and the second driven gear.

Abstract: A tandem type trochoid pump is comprised of a drive shaft having a non-circular end portion, a spacer positioned between a first trochoid pump and a second trochoid pump in a housing body, a first fixing portion for fixing a first inner rotor of the first trochoid pump to the drive shaft in a rotational direction, and a second fixing portion for fixing a second inner rotor of the second trochoid pump to the drive shaft in the rotational direction.

Abstract: The invention pertains to an apparatus for premixing additives and feeding them into a polymer melt stream. The apparatus has a conducting element 2, first and a second intermediate element 4a and 4b, and a pump assembly 6, wherein the polymer melt stream is guided through channels 8 and 10 of the conducting element. The second intermediate element 4a has a feed element 12 that extends into the first channel 8 to form a ring channel. The feed element 12 is surrounded by openings 14, through which a portion of the polymer melt is drawn off, so that it can be mixed with an additive inside the pump assembly 6. This mixture is then returned via the feed element 12 to the polymer melt stream. The apparatus according to the invention makes it possible to decrease the residence times of the polymer and requires very little in the way of apparatus.

Abstract: The invention is relative to a series of gear motors for differing output volumes with at least two gear motors. Each gear motor has at least two intermeshing displacing elements, a first displacing element and a second displacing element in the form of gears. The individual gear motors of the series comprise substantially identical dimensions for the axial interval between the theoretical axes and between the theoretical axes of rotation of the two displacing elements, and a substantially identical gearing width in the form of a substantially identical axial extension of the gearing elements. The individual gear motors differ from each other at least as regards the size of the tip circle diameter of at least one of the two displacing elements.

Abstract: The instant invention relates to a displacement-type rotary system steam-turbine engine that among other mainly functions as a displacing-type steam engine. Through the partial utilization of the kinetic energy generated by the impinging steam molecules upon the rotor blades said invention functions additionally similar to a radial flow turbine.

Abstract: A double-staged, rotary pump and a fluid flow control device is disclosed. An inner rotary member is fixed to a rotatable drive shaft. The inner rotary member has n circumferentially spaced radially projecting teeth. An intermediate rotary member having n+1 internal teeth encircles the inner rotary member and is mounted for rotation about an axis eccentrically disposed from the drive shaft axis. The intermediate member has n+1 circumferentially spaced radially projecting teeth. An outer rotary member having n+2 circumferentially spaced internal teeth encircles the intermediate member and is mounted for rotation about an axis coincident with the drive shaft axis. The inner rotary member drivingly engages the intermediate rotary member which in turn drivingly engages the outer rotary member, all members rotating in the same direction.

Abstract: A rotary internal combustion engine having separately housed compression and power rotors, and wherein there is a pair of sealing rotors positioned adjacent to diametrically opposite peripheral edges of each rotor to form two sealed pressure chambers in each housing.

Abstract: In a double-acting rotary compressor having two compression spaces each constituted by at least one variable-volume compression chamber which is put into communication first with the suction enclosure and then with the discharge enclosure, the power consumption at low delivery is reduced by causing the two compression spaces to discharge in parallel into a common duct in the vicinity of maximum delivery and connecting the spaces in series for deliveries below a predetermined value by joining the outlet of the first space to the second space at a point at which the compression chamber is already isolated from the suction enclosure.