Abstract: A axially split casing with flange connection of two casing halves, wherein the casing upper part (1) is bolted to the casing lower part (2) with split line bolts (5) on the circumference of the axial split line flange (3). An axially divided casing extension (9), which is surrounded by a coaxially arranged axially unsplit ring (11) on the outer circumference, is arranged at one or both end faces (4) of the casing upper part (1) and the casing lower part (2) in the area of the casing axis (8). Wedge-shaped tensioning elements (14), which are tensioned by means of tension bolts (15) between surfaces (13) arranged in the ring (11) and countersurfaces (12) of the collar (10) of the casing extension (9), may be additionally arranged between surfaces (12, 13) arranged in the ring (11) and the collar (10) of the casing extension (9).

Abstract: A spiral housing with a spiral cross-section for a turbomachine, in which a disk diffuser with an upstream annular disk space is asymmetrical to the spiral cross-section. This spiral cross-section has a base circle of substantially constant diameter. The spiral cross-section also has a tongue region and a region adjacent to the tongue with circular spiral cross-sections extending to where an outside diameter of the spiral cross-section equals a specific diameter and the circular spiral cross-sections continue thereafter to increase in cross-section only axially.

Abstract: A geared multishaft turbocompressor with impellers arranged in series in terms of flow, which are fastened to two or more pinion shafts, which are arranged in parallel to one another and are driven directly via a central gear or indirectly via pinion shafts on the circumference of the central gear. Two or more compressor impellers are arranged in the same direction of flow in the area of the high-pressure stages III and IV on a pinion shaft. An intercooler is arranged between an intermediate outlet housing and an intermediate inlet nozzle. In stage III, the gas enters the impeller through the inlet nozzle, and it leaves the compressor via an intermediate outlet housing. After intercooling, the gas again enters stage IV via the inlet nozzle, and it leaves this stage via the outlet housing after flowing through the second impeller. An analogous arrangement of the stages Ia, IIa, IIIa is used in the radial expander, with opposite direction of the gas flow.

Abstract: A geared multishaft turbocompressor with impellers arranged in series in terms of flow, are attached to two or more pinion shafts (6), which are arranged in parallel to one another and are driven directly via a central gear (5) or indirectly via pinion shafts at the circumference of the central gear (5). A plurality of impellers (8, 8a) are arranged in series, via the interstage diaphram of a disk-type diffuser (9) and of a return ring (10), on at least one pinion shaft end (6) in high-pressure stages following low-pressure stages (first pinion shaft or first and second pinion shafts) after the second or third pinion shaft (6). Reversing the direction of flow, i.e., admission of the gas on the high-pressure side and discharge of the gas on the low-pressure side, as well as with simultaneous reversal of the direction of rotation, a radial expander (turbine) is obtained with the same basic design.

Abstract: An internal combustion engine charging unit is disclosed which includes a displacement compressor connected to a drive shaft of an internal combustion engine so as to be driven by the internal combustion engine. The displacement compressor is preferably a screw compressor including a main rotor and a secondary rotor. An exhaust gas turbine is connected to an exhaust line of the internal combustion engine. The shaft of the gas turbine is preferably connected to one of the main rotor, secondary rotor or both the main rotor and the secondary rotor.

Abstract: An internal combustion engine charging unit is disclosed which includes a displacement compressor connected to a drive shaft of an internal combustion engine so as to be driven by the internal combustion engine. The displacement compressor is preferably a screw compressor including a main rotor and a secondary rotor. An exhaust gas turbine is connected to an exhaust line of the internal combustion engine. The shaft of the gas turbine is preferably connected to one of the main rotor, secondary rotor or both the main rotor and the secondary rotor.

Abstract: A liquid-sealed shaft seal for sealing the lead-through between an inner space and an outer space of a shaft with feed bores for a sealing liquid which is supplied at higher pressure than the pressure in the inner space. The seal includes partial seal gaps extending on both sides of these feed bores, and includes an inner partial seal gap in the form of a threaded shaft seal with recycling toward the sealing liquid feed. A disk with a larger outside diameter than the diameter of the inner partial seal gap is placed between the inner and outer partial seal gaps, and forms a pump chamber with the seal housing. A radial pressure increase of the supplied sealing liquid occurs in the pump chamber at higher speeds of rotation, and bores that are connected to a pressure chamber open into its radially outer area.

Abstract: A gear train comprises a central wheel for rotation about a central axis and a plurality of pinions engaged with either inner or out circumferential teeth of the central wheel. The pinions are mounted on shafts and have teeth which are meshed with the teeth of the central wheel. A relative position of the pinion and central wheel teeth is influenced through external adjusting forces applied to the wheel and pinions. To this end, the pinions are mounted in active magnetic bearings whose magnetic force is controlled through sensors which sense the radial position of the central wheel. In this way, the radial position of the pinion shafts can be controlled using the magnetic bearings and as a function of the radial position of the circumference of the central wheel to maintain a desired spacing between the wheel and pinion teeth. This control can be used to compensate for centrifugal and thermal expansion or contraction forces.

Abstract: A liquid sealed shaft seal for a rotatable shaft comprises a housing disposed around the shaft and defining a seal chamber which can be supplied with sealing liquid. A seal disc is fixed to the shaft and extends into the chamber. An axially movable piston is mounted on the housing for axial movement toward and away from a side face of the seal disc. The piston is provided with a slide ring which engages the slide disc when the shaft is at a standstill and which, through a circumferentially induced increase in pressure for the sealing liquid in the chamber, is moved axially away from the disc when the shaft and disc rotate. A resilient bellows is connected between the piston and the housing for biasing the piston toward the disc.

Abstract: A liquid packing for shafts comprises a seal ring rotating at the machine speed, and a non-rotating seal ring which is tightly fitted to the housing and axially yielding. The rotating ring is made of a material of high thermal conductivity, high strength and surface hardness in the sealing area. The rotating ring carries one or more floating rings, with a sealing gap concentric with the shaft being formed therebetween. The rotating ring is made of a hardened copper beryllium alloy, the non-rotating ring of slide carbon.

Abstract: A fluid sealed shaft seal has a radial sealing gap formed between radial surfaces of a first seal ring rotating with a shaft, and a second stationary seal ring biased toward the first ring and connected over a packing element to a housing. The stationary seal ring carries at least one sealing fluid supply bore and at least one sealing fluid discharge bore for supplying and discharging sealing fluid to and from the gap, to maintain a gap width. Spiral grooves are provided radially outwardly or radially inwardly of the supply and discharge bores for supplying an auxiliary sealing fluid to establish a high pressure annular area to prevent escape of the sealing fluid from the gap.

Abstract: In a liquid packing, the inlet pressure of the sealing liquid is substantially increased above the gas pressure at the high pressure side, by means of a centrifugal packing which is enclosed at both sides by an annular floating body and provided, at both sides, with flow passages and, radially farther, with annular flanges to obtain a safe seal. Check valves opening at a definite intermediate pressure effect a flow of the sealing liquid through the high pressure-side sealing gap between the shaft packing and the floating body and passages in the floating body, to mix it with the supplied sealing liquid, whereby the friction heat produced in the sealing gap is removed to a large extent.

Abstract: In a shaft seal having a radial plane seal ring gap and comprising a seal ring rotating with a shaft, and a non-rotating seal ring mounted on a housing of the seal through an element which is elastically yielding in every direction and serves as a packing at the same time, the sealing fluid flows into the sealing gap through supply bores and through associated distributing pockets which are provided in the non-rotating seal ring and/or at the outer or inner circumference of the rotating seal ring. Sensors for measuring the sealing gap are provided in the non-rotating seal ring on the gap side. By means of the measured values, electromagnets disposed in the seal housing to face each other and cooperating with opposite magnetizable bodies provided in the non-rotating seal ring, are electronically controlled to maintain a predetermined constant small width of the seal gap.

Abstract: A seal device for a shaft rotating with respect to a housing comprises a rotating seal ring having opposite radial side surfaces and a circumferential end surface. The rotating seal ring is connected for co-rotation with the shaft. A non-rotating seal ring is non-rotatably connected to the housing over a yielding packing element and surrounds at least a portion of the rotating seal ring to define axial plane sealing gaps and an annular circumferential gap. Sealing fluid is pumped to each gap over bores communicating with the radial plane gaps. An electromagnet is connected to the housing and attracts or repels magnetic material in a radially extending portion of the non-rotating seal ring for regulating the width of each radial plane gap. Electromagnet is connected over a control unit to a sensor for sensing each gap, to maintain a selected gap width for each gap by regulating the activation of the electromagnet. The non-rotating seal ring is also slidable within a smooth sleeve connected to the housing.

Abstract: A gas seal for a rotatable shaft of a housing which comprises, a first rotatable dimensionally stable seal ring connected to the shaft. A diaphragm is connected to the housing which exerts an axial bias on a second rotatable seal ring. The bias of the diaphragm provides a gap space between the rotatable and fixed seal ring which is supplied with a sealing gas. The material of the fixed ring is different from that of the diaphragm. A compensating ring is connected unilaterally to the fixed ring and of a material at least partly the same as the fixed ring. A slide seat is defined between the compensating ring and the fixed ring to permit axial movement of at least a part of the compensating ring. This part is connected in turn to the diaphragm so that stress free transmission of axial thrust is provided between the seal ring and the diaphragm.

Abstract: A fluid-locked shaft seal comprises a housing with a shaft rotating therein having a seal ring affixed thereto for rotation therewith. A packing ring is disposed in the housing around the shaft and is fixed radially in respect to the shaft but is held by flexible means which permits its axial movement to some extent. A slide ring in the housing around the shaft is located between the seal ring and the packing ring and connected to the shaft for rotation that is substantially half the speed of rotation of the shaft. A pump rotor is formed with the seal and disposed on the side of the seal ring which is adjacent to the slide ring and generates a fluid flow in a deflecting channel which is defined in the housing by slide ring and the seal ring. A plurality of stationary impellers are disposed in the deflection channel and the slide ring has a turbine portion disposed in this channel.

Abstract: A gas-sealed shaft packing, comprises a rotary sealing ring which is adapted to be fixed to the shaft for rotation therewith and which has respective end surfaces which are spaced apart slightly from respective fixed sealing rings to define a sealing gap on respective sides of the rotary sealing ring. The fixed rings are biased toward the movable ring and gas conduits extend from a housing into each fixed ring and terminate in the gap between the fixed ring and the associated rotary sealing ring. The fixed rings are held by flange members which extend radially inwardly from the housing toward the shaft and resilient diaphragms are disposed between the flanges and the fixed rings or non-rotatable rings so as to urge them toward the rotatable sealing ring carried by the shaft.