151 results about "Rotor design" patented technology

A method of designing rotors for a Roots blower comprising a housing having cylindrical chambers, the housing defining an outlet port (19). The blower includes meshed, lobed rotors (37,39) disposed in the chambers, each rotor including a plurality N of lobes (47,49), each lobe having first (47a,49a) and second (47b,49b) axially facing end surfaces. Each lobe has its axially facing surfaces defining a twist angle (TA), and each lobe defines a helix angle (HA). The method of designing the rotor comprises determining a maximum ideal twist angle (TAM) for the lobe as a function of the number N of lobes on the rotor, and then determining a helix angle (HA) for each lobe as a function of the maximum ideal twist angle (TAM) and an axial length (L) between the end surfaces of the lobe. A rotor designed in accordance with this method is also provided.

A turbine / compressor comprises at least one magneto-electric device and a drive train coupled to the magneto-electric device. At least one rotor blade is coupled to the drive train. The rotor blade has a shaped leading edge with a series of spaced tubercles formed therealong.

A blender device including a rotor designed to engage with a motor device to be rotated; and an annular ring enclosing the rotor and having at least one axial orifice and a plurality of radial orifices for the passage of the blend. The blender also includes an admission duct for admitting particles intended to be incorporated into the blend, leading into the interior of the annular ring. The blender also effectively dispenses particles in a blend by introducing the particles with a high flow and decreasing product losses.

An improved magnetic drive for a mixing system and method, wherein stagnation or collection of material in the region of the containment shell and any magnetic rotor are alleviated by the provision of pitched blades provided as radially extending spokes in the inner magnetic rotor. This bladed rotor design may be particularly advantageous in the case of a side entry mixer.

Blood pump devices having improved rotor design are provided herein. Such blood pump devices include rotors having cantilevered support through a sealed mechanical bearing disposed outside a blood flow path of the device so as to avoid thrombus formation caused by blood contact with the bearing. The bearing means can be rotatably coupled with a proximal portion of the rotor shaft extending outside the fluid path, while a stator drives rotation of the rotor shaft so that one or more rotor blades on a distal portion of the rotor force blood flow through the device. The bearing means may include one or more radial bearings on a proximal portion of the rotor shaft that are isolated from the blood flow path by one or more rotary seals.

A vertical wind-driven electricity generation device and rotor design is described, which utilizes a unique segmented Savonius rotor and which is easily handled, transported, assembled and maintained,even by a single person. The blades of the rotor are segmented into a plurality of modest size blade pair segments, each of which comprises two (or optionally, three or four) low height, helically curved blade portions. The blade pair segments are preferably of the same height and diameter. The rotor is mounted on a central vertical shaft connected to a generator. When the plurality of blade portions are installed on the device's central shaft, the overall blade configuration functions as an unitary Savonius rotor. Flow of gas (normally air in the form of wind) causes the segmented Savonius rotor to move, turning the shaft and rotating member of the generator to rotate, causing the generator to generate electricity.

A fan rotor capable of avoiding coincidence will include a fan hub comprising one or more slots each designed to receive a fan blade; and one or more fan blades disposed within the slots. One or more slots will comprise an RZ′ baseline and have one or more second fan blades disposed therein while another set of slots will have an RZ baseline having one or more first fan blades disposed therein. The tips of the second fan blades will be positioned at a distance farther from the fan hub than the tips of the first fan blades disposed, which when implemented in a turbofan engine will avoid coincidence occurrences.

There is disclosed a design method of claw rotors, which is used for designing defined rotors conjugate engaged each other and conjugate rotors. Taking the parameterization definition of the motion curvilinears of an ineffective compression to a beginning of the air-intaking and start to end of exhausting of two rotors estimates and seeks out the optimum performance of the rotor. When the rotor designed by the present invention is for use in a vacuum pump, a compressor, a supercharger and the like, it can provide a higher compression ratio and a transfer volume.

A centrifugal dryer that has improved throughput capacity resulting from the combination of a high angle agglomerate catcher with optional overflow, increased dewatering capacity, a cylindrical dewatering feed chute, a modified rotor design with positionally and structurally modified lifters in the feed and dewatering section, the drying and propagating section, as well as the pellet discharge section, and an efficient circumferential foraminous membrane.

A fan or rotor design where the surface profile may be configured to desired dimensions particular to a given operating environment is disclosed.

The invention provides a rotor with an inclined magnetic pole and an asymmetric salient pole and a high-performance permanent magnet motor; the magnetic pole inclined pole is implemented in one magnetic pole polar distance, and the salient pole is arranged on one side of the magnetic pole and has asymmetry in the circumferential direction. According to the rotor design of the high-performance permanent magnet motor, the torque pulsation can be reduced, and the reduction of the output torque after torque pulsation can be effectively avoided, the low-torque pulsation of the motor is realized, the high-torque density operation is achieved, and the performance of the motor is greatly improved; the method specifically comprises the following steps that 1) the torque of a tooth groove is reduced; 2) the sinusoidal or quasi-sinusoidal back electromotive force is generated to reduce the torque pulsation; and 3) the axial direction of the adjacent magnetic poles is not overlapped, so that the overlarge attenuation of the torque density is avoided; and by virtue of the asymmetric salient pole rotor structure, the maximum values of the magnetic resistance torque and the permanent magnet torque are overlapped under the same or similar current phase angles, so that the torque loss caused by the magnetic pole inclined pole is made up by increasing the utilization rate of the two torque components, the low torque pulsation of the motor is ensured, and meanwhile, the high torque density is kept.

A power generating unit consists of an internal combustion engine (1) and a generator (2), the former comprising a crankshaft (8) received in a crankcase (5) and the generator comprising a generator housing (20) connected to the crankcase (5), a stator (36) and a rotor (30) that is connected so as to rotate with the crankshaft (8). The aim is to provide a power generation unit that requires little space and that allows a precise guidance of a rotor designed for the overall unit power. A concentric stub shaft (11) is fixedly connected at the one end to the crankshaft (8) and at the other end to the rotor (30). The generator housing (20), on its side facing the internal combustion engine (1), has a front plate (21) that accommodates a bearing (23) for the sub shaft (11). The rotor (30) is otherwise overhung.

The invention relates to a multi-purpose vertical take-off and landing unmanned aerial vehicle, which belongs to aviation system technology. A flip-wing V-22 Osprey, in which pitching and heading in a vertical take-off and landing state are controlled through periodical variable pitch, is available for tiltrotor aircrafts internationally. The scheme is not available for the tiltrotor aircrafts in domestic at the present stage. The biggest difficulty for the multi-purpose vertical take-off and landing unmanned aerial vehicle is excessive flight condition of the unmanned aerial vehicle from the vertical take-off and landing state to a level-flight state. The multi-purpose vertical take-off and landing unmanned aerial vehicle can take off and land like a helicopter and can also fly like a fixed-wing aircraft; and through the adoption of a coaxial dual-rotor design, the load capacity of the multi-purpose vertical take-off and landing unmanned aerial vehicle can be improved within a limited rotor diameter space. At present, an unmanned aerial vehicle, which can take off and land vertically and can also fly for a long time, is expected for both military use and civil use.

A generator may incorporate a positively restrained balance ring. A generator may include a rotor core including a rotor, and a balance ring. The balance ring may include a weight. The balancer may include a plurality of balance holes in the ring, at least one of the plurality of balance holes to receive a weighted insert. A method of balancing a rotor of a generator may include mounting a balance ring adjacent to a rotor core, and adjusting weights to be located at one or more of a plurality of positions equally spaced around the balance ring to balance the rotor.

This invention relates to a synchronous electric machine including a stator and a rotor, wherein the stator includes a multi-pole stator winding set, the rotor includes a multi-pole cylindrical rotor design or salient pole design with at least two-phase rotor winding set on the cylindrical rotor having the same number of poles as the stator, and the stator windings provide excitation to the rotor by means of stator current imbalance or superimposition, by secondary windings to produce harmonic flux or by a three-phase winding with an external source of excitation. Furthermore, the invention relates to a method for operating a synchronous electric machine.