Abstract: A connection device serves for connecting a first tube end, which can be connected to a vacuum pump, to a second tube end which can be connected to a chamber to be evacuated. To this end, the connection element has a tube element for fluidically connecting the vacuum pump to the chamber to be evacuated. The tube element is connected on each side via a connection element to the respective tube end. At least one of the two connection elements is configured here in such a way that it is exclusively suitable for transmitting torques. Furthermore, a decoupling element is provided for mechanically decoupling the at least one connection element, which is exclusively suitable for transmitting torques, from the corresponding tube end.

Abstract: A device for storing kinetic energy, which has a flywheel in a housing. The flywheel is mounted in the housing via a shaft. A motor-generator unit is provided for storing energy as well as for energy recovery. In order to improve efficiency, a vacuum pump for evacuating the interior is arranged in the housing. The vacuum pump is disposed on the shaft.

Abstract: A connection device serves for connecting a first tube end, which can be connected to a vacuum pump, to a second tube end which can be connected to a chamber to be evacuated. To this end, the connection element has a tube element for fluidically connecting the vacuum pump to the chamber to be evacuated. The tube element is connected on each side via a connection element to the respective tube end. At least one of the two connection elements is configured here in such a way that it is exclusively suitable for transmitting torques. Furthermore, a decoupling element is provided for mechanically decoupling the at least one connection element, which is exclusively suitable for transmitting torques, from the corresponding tube end.

Abstract: A device for storing kinetic energy, which has a flywheel in a housing. The flywheel is mounted in the housing via a shaft. A motor-generator unit is provided for storing energy as well as for energy recovery. In order to improve efficiency, a vacuum pump for evacuating the interior is arranged in the housing. The vacuum pump is disposed on the shaft.

Abstract: A rotor disc for a vacuum pump, in particular a turbo molecular pump, having an inner ring. The inner ring is connected to a plurality of blade elements extending radially outward. The inner ring has at least one expansion joint. For assembly, the inner ring can be surrounded by a retaining ring and arranged on a hollow cylindrical carrier element as applicable.

Abstract: A rotor disc for a vacuum pump, in particular a turbo molecular pump, having an inner ring. The inner ring is connected to a plurality of blade elements extending radially outward. The inner ring has at least one expansion joint. For assembly, the inner ring can be surrounded by a retaining ring and arranged on a hollow cylindrical carrier element as applicable.

Abstract: A multi-stage pump rotor (10) for a turbomolecular pump has at least two separate blade disk rings (17), each having a motor ring (12) and at least one blade disk (14). A cylindrical reinforcement pipe (18), which surrounds the rotor rings (12) of the blade disk rings (17) on the outside without clearance, is provided between the blade disks (14) of adjacent blade disk rings (17). The reinforcement pipe (18) absorbs a large part of the tangential forces occurring during operation such that the pump rotor (10) has improved stability at high rotor speeds.

Abstract: A ball bearing (1) has an inner race (2) and an outer race (3). In order to prevent the rotating parts from being damaged when the bearing assembly fails, the bearing has emergency bearing surfaces (14, 15) which are concentric to the rotational axis (6) and of which one is a part of the rotating bearing race and the other is a part of the fixed bearing race. During normal operation, the emergency bearing surfaces (14, 15) are situated opposite one another with a relatively narrow gap (24) therebetween. But, in the event of failure, the surfaces (14, 15) engage and function as emergency bearing surfaces.

Abstract: A vacuum side channel compressor (10) comprises a pump stator (14) and a pump rotor (12), which surround a side channel (31,32,33,34). An axial bearing (22) is provided for mounting the pump rotor (12). A sealing gap (40) is formed next to the side channel between the pump stator (14) and the pump rotor (12), part of which forms a conical ring whose imaginary cone apex (50) lies in the vicinity of the axial bearing (22).

Abstract: A multi-stage vacuum pump includes at least one turbo-compressor stage (11) and is equipped with a circular compressor stage (33) on the pressure side of the turbo-compressor stage. The pump has small axial dimensions, enabling the compression to be increased without significantly increasing the space requirement.

Abstract: A mechanical vacuum pump includes a rotor made of a light metal alloy by powder metallurgy. The powder metallurgy increases the resistance of the rotor to heat and creep.

Abstract: A side channel pump, preferably a vacuum pump, includes a driven rotor (16) and a fixed stator (14). The rotor (16) and the stator (14) define a pump channel circulating in a peripheral direction. Blades are fixed onto the rotor, protruding into the cross-section of the pump channel. The pump channel also includes a blade-free side channel (44). The pump channel (22) containing the side channel (44) extends in a helical manner around the rotor (16). The pump channel is advantageously not limited to the length of a winding but can have the length of substantially any number of uninterrupted windings. As a result, a high suction performance and a high compression ratio in the pump can be obtained.

Abstract: A ball bearing (1) has an inner race (2) and an outer race (3). In order to prevent the rotating parts from being damaged when the bearing assembly fails, the bearing has emergency bearing surfaces (14, 15) which are concentric to the rotational axis (6) and of which one is a part of the rotating bearing race and the other is a part of the fixed bearing race. During normal operations the emergency bearing surfaces (14, 15) are situated opposite one another with a relatively narrow gap (24) therebetween. But, in the event of failure, the surfaces (14, 15) engage and function as emergency bearing surfaces.

Abstract: A friction vacuum pump (1) comprises a fixed element (7) bearing rows of stator blades (3) and a rotating element (6) bearing rows of rotor blades (2). The rows of stator blades and rotor blades are arranged concentrically with respect to an axis of rotation (4) of the rotating element (6) and mesh with each other. In order to create in the axial direct a short friction pump, the elements (6, 7) bearing the rows of rotor blades and stator blades extend in a substantially radial manner and the longitudinal axes of the blades (2, 3) extend in a substantially axial manner.

Abstract: The invention relates to a magnetic bearing having a fixed first bearing portion and a movable second bearing portion which is contactlessly supported on the first bearing portion. The first bearing portion (12) comprises a magnetic coil (42) generating a magnetic field and having a yoke (44). The second bearing portion (18) comprising a permanent magnet (50) which is magnetized in alignment with the yoke (44). The permanent magnet of the second bearing portion has an attracting effect upon the yoke of the first bearing portion. To avoid this, the first bearing portion is provided with a permanently magnetized compensation magnet (54) which is located opposite the permanent magnet (50) of the second bearing portion (18) and is magnetized oppositely to the permanent magnet (50).

Abstract: A mechanical kinetic vacuum pump with a stator (1), a rotor (6, 7) made from an aluminum or magnesium alloy and a rotor (6, 7) and a bearing shaft (3). The shaft (3) and the rotor (6, 7) are connected by a shrink- or screw-fit in a secure permanent connection. The rotor (6, 7) is made by spray forming. The main alloying component in the aluminum or magnesium alloy is silicon which is present in an amount such that the alloy has an expansion coefficient which essentially corresponds to the expansion coefficient of the shaft material.

Abstract: A rotor (12) is mounted in a stator (14) with radial magnetic bearings (16, 19) and with an axial magnetic bearing (40) in a contactless manner. The axial magnetic bearing (40) produces an axial magnetic field with a magnet coil (40) and a yoke iron (44) mounted on the stator (14). An axially magnetized permanent magnet (50) is provided on the rotor (12), located approxaimately axially opposite the yoke iron (44). A permanently axially magnetized compensating magnet (54) is provided on the stator (14) and arranged axially opposite the permanent magnet of the rotor (50) and polarized in the opposite direction, such that the permanent magnet (50) of the rotor and the compensating magnet (54) repel each other. In a center position, the rotor is bias-free by compensating the forces of attraction between the permanent magnet of the rotor and the yoke iron. As a result, the center position of the rotor can be adjusted with relatively small magnet coil flows.

Abstract: A vacuum line (10) comprising a vacuum-tight flexible tube section (22) and a vibration damper (16) axially parallel to the flexible tube section (22) serves to connect tow vacuum devices (12, 14). The vibration damper (16) is an actively regulated axial magnetic bearing. Thereby, a vibration damper with good dampening properties is realized. By changing the regulation parameters, the vibration damper is adaptable and not subjected to any mechanical wear. The transmission of structure-borne noise is avoided by the contactless vibration dampening.

Abstract: A vacuum pump has two shafts (3, 4) and two rotors (1, 2) which co-operate with each other and which are fixed to the shafts. The rotors are cantilevered on the shafts. The rotors are fixed to the shafts in a manner which is devoid of backlash, even during temperature changes. In order to achieve this, the shafts (3, 4) are made of a material having a modulus of elasticity which is as high as possible, e.g., steel. The rotors (1, 2) are made of a material having a density which is as low as possible, e.g., aluminum or a titanium alloy. Structures (8; 11, 12, 13; 14, 15; 25, 27; 38, 41; 43, 44, 45; etc.) are provided to ensure that the rotors (1, 2) are fixed to the shafts (3, 4) in a manner which is devoid of backlash at all operating temperatures.

Abstract: A magnetic bearing for rapidly rotating machines (1), in particular, for turbo compressors, drag vacuum pumps, or similar, includes two bearings (3, 4), each with a stator magnetic-ring set (5, 7) and a rotor magnetic-ring set (6, 8). Movement of the rotor is damped by magnetic-ring sets (5, 6; 7, 8) arranged concentrically to each other. The stator magnetic-ring set (5 or 7) is arranged externally and the rotor magnetic-ring set (6 or 8) is arranged internally. Non-magnetic elements with good electrical conducting properties (32, 54, 55) are connected to the outer circumference surfaces of at least one part of the magnetic ring of each of the stator-side magnetic-ring sets (5, 7).