摘要:
The invention relates to a rotor device (1) in which a rotor (3, 30, 32, 36, 42) interacts with a fluid. The invention is characterized in that: a) the rotor device (1) comprises a support tube (2); b) a rotor (3, 30, 32, 36, 42) is mounted in said support tube (2) in a rotating manner; c) the rotor (3, 30, 32, 36, 42) is configured such that it can interact with a fluid flowing through the support tube (2); d) on both end faces the rotor (3, 30, 32, 36, 42) has axially magnetized permanent-magnet rotor magnets (7, 8; 46, 47); e) permanent-magnet stator magnets (18, 19; 52, 53) which are connected to the support tube (2) are mounted axially opposite the face ends of the rotor (3, 30, 32, 36, 42); f) each stator magnet (18, 19; 52, 53) is axially magnetized in such a way that adjacent stator and rotor magnets (18, 19; 7, 8; 46, 47; 52, 53) attract each other; and g) the rotor device (1) comprises a magnetic axially stabilizing device (22, 23, 27; 58, 59, 66) for the rotor (3, 30, 32, 36, 42).
摘要:
The invention relates to an oscillating piston drive, especially for on oscillating piston vacuum pump. Said oscillating piston drive comprises a housing (2), with a cylinder (3) that is configured within the housing and with a piston (4) that reciprocates within the cylinder. The drive is further provided with an electromagnetic drive for the piston (4) which comprises an electromagnet (11) at the stator end and at least one permanent magnet (1, 19) at the piston end. The aim of the invention is to prolong the service life of such an oscillating piston drive. To this end, permanent magnets (15, 16) are also provided at the stator end and the permanent magnets (18, 19) of the piston (4) and the permanent magnets (15, 16) of the stator are configured and arranged in such a manner that the piston (4) has a substantially central axial position in a non-operative state.
摘要:
The invention concerns a direct current electric motor with a reference axis Z-Z and comprising a first body (A) bearing a first polar part (11), a second body (B) bearing a second polar part (12), said first body and second body having a degree of relative movement transverse to the reference axis, said first polar part and said second polar part being separated by a first air gap (13) transverse to the reference axis and extending along a relative movement line (100) arranged transverse to the reference axis, and by at least a second air gap (16, 17) distinct from the first but parallel thereto. It also comprises a permanent magnetisation bar (14) integral with the first body and generating magnetic flux lines circulating in the first and second polar parts and passing through said first and second air gaps, said permanent magnetisation bar having, relative to the reference axis, a constant magnetising direction over its whole length, electrically conductive strands (15) integral with the second body, extending in said first air gap parallel to the reference axis and connected to an electric source such that the currents circulating therein have, at all times, a common direction parallel to said reference axis.
摘要:
A polyphase spindle DC motor (figure 1A, 1B) providing a torque (figure 1A) and an additional radial force (F, figure 1B) within the spindle motor utilizing the spindle components (magnets and stator laminations). Interaction between the magnets and currents flowing through conductors create the torque and radial force (F) required for overall stability and efficient operation of the system.
摘要:
A rotary pump for pumping fluids through a patient having a housing with an internal region, a stator member and an impeller positioned within the housing and having impeller blades, wherein the impeller is magnetically suspended and rotated, and wherein the geometric configuration of the rotary pump is sized and proportioned to minimize stagnant and traumatic fluid flow within the rotary pump. The plurality of magnetic impeller blades are preferably rare earth, high-energy-density magnets selected from the group consisting of samarium cobalt and neodymium-iron-boron alloy.
摘要:
A backup bearing (30) for supplying backup to magnetic bearings is provided, the backup bearing comprising: an outer race (32) disposed about the axis (Y) of a stationary shaft (17), the outer race mounted to a flywheel assembly (16) for rotational movement about the axis; an inner race (36) spaced from the outer race (32) and disposed about the axis (Y), the inner race (36) being substantially stationary with respect to the axis (Y); and a plurality of rolling elements (34) each having a central axis with each element being spaced from the inner race (36) and disposed between the inner (36) and outer race (32) for rotational movement therebetween. Rotation of the outer race (32) causes corresponding rotation of the plurality of rolling elements (34) such that upon contact of the rolling elements (34) with the inner race (36), the speed differential between the rotating rolling elements (34) and the substantially stationary inner race (36) causes each rolling element (34) contacting the inner race (36) to accelerate about its central axis with little wear on the rolling elements (34) due to skid damage because neither the inner race (36) nor the outer race (32) inertia needs to be overcome since both are always functioning at their operational speeds.
摘要:
The invention relates to a canned electric motor for a centrifugal pump, having a rotor (3) with an axis of rotation (A) and a stator (4), in which the rotor (3) is a hollow cylindrical outside rotor running in the direction of the axis of rotation (A) and the stator (4) is inside the rotor (3), and in which at least the surface of the rotor (4) facing the rotor (3) is surrounded by an impermeable material.
摘要:
A compressor (10; 100; 200; 300; 500) with a build-in reciprocating motor, comprises a cylindrical housing (20; 120; 210; 510) with two ends thereof fitted with tow opposing electromagnets (30; 130; 230; 530), each has a circular inner pole (36; 136) and a coaxial annular outer pole (34; 134). A free piston (50; 150; 250; 560; 600) is disposed in the housing between the two electromagnets, dividing the interior of the housing into two chambers (I, II). The piston carries permanent magnets (40; 140, 145; 561; 610), providing inner and outer poles (44, 46; 141, 146) which have conical surface portions (43, 49; 141, 146) complementary with the corresponding poles (34, 36; 134, 136) of the electomagnets. Sliding pole pieces (630 and 660) can be used to increase the stroke length and reduce the piston's total weight. Valves (61, 63, 65; 161, 165) are fitted to form one-way flow passage connecting the inlet and the outlet of the compressor. In operation, the complementary surfaces of the electromagnets and the permanent magnets form concentric forces which drive the free piston axially while keeping it magnetically suspended, so as to minimize the frictional resistance to the piston's movements and to reduce its wear to minimum. Buffer mechanisms, including air, spring and/or magnetic cushioning, are formed between the piston and each of the electromagnets to prevent direct physical impact between them. A movable support (280; 580) provides automatic adjustment of piston's stroke length in response to changes of output pressure. A circuit (285, 283, 212, 211, 221) is formed to circulate a lubricant for keeping the piston lubricated. Magnetic coupling arrangement (570, 545, 555) is made to further improve the compressor's energy efficiency. In application, a number of the compressors can be connected in series to build up a high pressure output.
摘要:
In a magnetically mounted, position-stabilised flywheel, the force-generating systems (M1) at least for the rotary drive are designed to operate on the electrodynamic principle and located inside the wheel hub. The coils are situated on the stator (S) and the associated permanent magnets are situated on the rotor (R). Unwanted oscillations are effectively damped. Transferring the drive to the interior of the hub permits the use of small coils. The angular range of the wheel is sufficiently large.
摘要:
In a magnetically mounted oscillation-damped flywheel, both the force generating systems (M1, M2) for the radial drive and transverse movement and the corresponding control sensors (SE1...SE4) are located in the wheel hub. Parasitic oscillations can thus be drastically attenuated without any adverse effect on the wheel's swivelling range.