647results about How to "Constant speed" patented technology

A system for actively controlling the working line location within a low pressure compressor. The system includes a plurality of variable inlet guide vanes that are adjusted to maintain the working line at a constant level as the low pressure compressor rotates at a constant speed.

A printing system including at least one printhead for printing material to create a printed product, and an object incorporation device that incorporates inorganic semiconductors into the product being printed whilst the at least one printhead prints the product.

An object of the present invention is to provide an image projector capable of projecting a high-quality image while realizing small size. In the image projector, a light flux is deflected two-dimensionally by turning a reflector for reflecting a light flux emitted from a light source around a second axis almost orthogonal to a first axis as a center by resonant drive while turning the reflector around the first axis as a center by non-resonant drive. Shape of one or more optical surfaces of a projection optical system for projecting an image onto a projection plane by guiding light onto the projection plane includes a shape for performing a correction for maintaining scanning speed of the light flux along one scan direction on the projection plane almost constant and a shape for performing a correction for suppressing a distortion in an image along the other scan direction almost orthogonal to the one scan direction on the projection plane. By controlling turn of the reflector, at least one of a correction for maintaining scanning speed of the light flux along the other scan direction on the projection plane almost constant and a correction for suppressing a distortion in an image along the one scan direction on the projection plane is performed.

A hydraulic turbine power generator mounted on a single shaft wherein the hydraulic turbine means includes a plurality of reaction type turbine stages arranged to be in combination, rotatably responsive to the hydraulic fluid coupled to the turbines. One of the turbine stages having axial turbine runner means mounted to the single shaft and having a plurality of adjustable blades for permitting the pitch of the blades to be adjusted for controlling the effective operative fluid head to cause the shaft to rotate at a preselected speed and including means for adjusting the pitch of the adjustable blades. The turbine stages can be a Francis type turbine and a Kaplan type turbine. The hydraulic turbine power generator can be oriented in an upward direction to cause the fluid flow to travel upwardly through the turbine stages and function as a two phase turbine expander resulting in the separation of the liquid phase from the gas / vapor stage.

A three dimensional object creation system that prints objects layer by layer, the system including a plurality of printheads, the system printing at least part of each of multiple layers simultaneously.

A process and apparatus for producing hydrocarbon oil from the thermal decomposition of waste plastics in a continuous process which comprises melting of a waste plastic feedstock into an auger assisted melt reactor to remove chlorine and organics contained in the waste plastic, and transferring the melted waste plastic into an heated screw pyrolysis reactor which includes a transitional metal heat transfer medium. The hydrocarbon gas from the pyrolysis reactor is fed into a vessel containing metal trays for a second decomposition which is connected with an alkali treatment 2-step process gas reactor to remove acidic gases, and any inorganic solids. The hydrocarbon gases are separated by three separate condensers. The hydrocarbon fraction of the first condenser is recycled back into the pyrolysis reaction for further thermal treatment, and the hydrocarbon fractions are collected in the remaining condensers.

A three dimensional object creation system that prints objects layer by layer, the system printing at least part of each of multiple layers simultaneously, wherein each layer is defined by a plurality of voxels arranged in a regular array and wherein the voxels of each layer are printed so as to be offset by half a voxel relative to the voxels of adjacent layers in a first direction, a second direction perpendicular to the first direction or both the first and second directions.

An optical scanning device is disclosed, which comprises a light source unit, a scanning unit for scanning a scanning surface with a light from the light source unit in a first direction and a second direction orthogonal to the first direction, and an optical unit for guiding the scanning light onto the scanning surface. The scanning unit has a deflection surface which sine-wave-drives in the first direction. The optical unit has an optical surface whose arbitrary cross section in the first direction has a shape where a second order derivative of the function representing a shape of the cross section changes so as to diverge a light stronger as toward the periphery from the center. And the optical surface is configured by arranging the shape of each cross section in the first direction in the second direction.

A three dimensional object creation system that prints objects layer by layer, the system including a plurality of printheads, the system printing at least part of each of multiple layers simultaneously, wherein the printheads are configured such that at least one of the layers may be printed with a first set of materials and at least one other of the layers may be printed with a second set of materials, and wherein the first and second sets are not the same.

A three dimensional object creation system that prints objects layer by layer, the system including a plurality of printheads, the system printing at least part of each of multiple layers simultaneously, the system configured to enable at least one first printhead that is initially configured to print at least part of a first layer to be dynamically reconfigured to print at least part of a second layer, and wherein if at least one printhead initially configured to print the second layer fails whilst printing said second layer, said at least one first printhead is dynamically reconfigured to complete the printing of at least part of said second layer.

A system that prints three dimensional products, the system including an object incorporation device that inserts at least one non-printed object into at least one cavity created during the printing process, the object incorporation device incorporating the at least one non-printed object into the at least one cavity during the printing of the respective printed object.

The invention relates to a turbine engine (1) with a semi-fixed turbine, particularly for aircraft driving a receiver (2) controlled so as to preserve a roughly constant rotation speed. The turbine engine, in particular via a gear system (20), drives the receiver and an LP compressor (6) with an LP turbine (14). According to the invention, the gear system has a torque control system (26) maintaining a constant ratio between the drive torque of the receiver transmitted by the gear system and the drive torque of the LP compressor transmitted by this same gear system.

A drive assembly for a supercharger for an internal combustion engine provides a continuously variable drive ratio between the engine and supercharger to provide a substantially, constant drive speed to the supercharger, thereby optimizing performance. The continuously variable drive may function in increments as well as allow the supercharger to free-wheel. The drive assembly includes a planetary gear drive assembly and a continuously variable hydrostatic transmission having a rotating, variably coupled master and slave pump and motor which, by adjusting its drive ratio, adjusts the ratio of the planetary gear assembly and thus the drive ratio between the engine and the supercharger.

The invention discloses an electromobile range extender and a control method. The electromobile range extender consists of an engine, an engine ECU (Electronic Control Unit), an electronic throttle valve controller, a direct current starter, an engine speed sensor, an alternating current permanent magnet synchronous motor, a three-phase full-control rectifier, filter capacitors, voltage sampling resistors, a current sensor, a freewheeling diode and a three-phase full-control rectifying voltage regulation phase-shift trigger, wherein the engine is started by the starter and then drags the alternating current permanent magnet synchronous motor to generate electricity and output the three-phase alternating current voltage to the thyristor three-phase full-control rectifier; after the direct current pulsating voltage output by the rectifier is filtered by the two filter capacitors connected in series, the three-phase full-control rectifying voltage regulation phase-shift trigger acquires the output voltage and current of the range extender to obtain the output power, and adjusts a conduction angle according to the power to realize closed-loop control of the power; and the electronic throttle valve controller acquires the engine speed, adjusts the throttle valve opening, and realizes the closed-loop control of the engine speed. The electromobile range extender and the control method have the advantages of low cost and high control precision.

The invention discloses a power inspection tour flying robot air route planning method based on a three-dimensional digital map in the technical field of power transmission line inspection tour flying robot air route planning method research. The method comprises: acquiring three-dimensional data information of terrain and surface features near a power line by using laser scanning technology and constructing a corresponding three-dimensional digital map; generating a barrier map according to the three-dimensional digital map and establishing a safe flight path for the inspection tour flying robot; if a weather condition which is not beneficial to flying robot inspection tour happens, immediately making an emergency landing in order to enable the flying robot safely land as near as possible, and reclaiming the flying robot after the emergency situation finishes; if no special weather condition happens, enabling the flying robot to determine whether an inspection tour task is completed after performing inspection tour for a certain time; if the inspection tour task is completed, enabling the flying robot to return along the original safe flight path; and if the inspection tour task is not completed, enabling the flying robot to perform autonomous risk avoiding according to the established safe flight path.

Rotational force of a driving motor is transferred to a photosensitive drum via a planetary-roller reduction device, so that the photosensitive drum is rotated. A speed detector set on the shaft of the photosensitive drum detects the rotational speed of the photosensitive drum. In accordance with the detected rotational speed of the photosensitive drum, the rotational speed of the driving motor is adjusted so that the photosensitive drum is rotated at a constant speed.

An object is to provide a image projection device which has a small size but can project an image having a high image quality. To achieve the object, in an image projection device, a reflection part which reflects a light flux from a light source is, while being rotated around a first axis by non-resonance driving, rotated by resonance driving around a second axis which is substantially perpendicular to the first axis, and thereby the light flux is deflected in a two-dimensional direction. By controlling the rotation of the reflection part, a correction for suppressing an image distortion along one scanning direction on a projection surface, and a correction for keeping substantially constant a scanning speed of the light flux along the other scanning direction on the projection surface, are performed. Here, the relationship of 10°<θ<70° is satisfied, where θ represents an angle of inclination of the light flux, which is projected to the projection surface, toward the other scanning direction relative to a normal line of the projection surface, in a case where the reflection part is in a central position of the rotations around the first and second axes.

The invention discloses a multi-configuration rope drive parallel robot and a space position and posture solution method thereof. The multi-configuration rope drive parallel robot is characterized by comprising a movable platform, a plurality of rope drive devices, a main rack and a plurality of ropes, wherein the rope drive devices can be arranged in an arbitrary position of the main rack according to task requirements; the movable platform is in an inner space of the main rack, and positions and postures of the movable platform can be freely changed in the inner space; the flexible ropes connected with the rope drive devices are arranged on the movable platform; and the rope drive devices pull the movable platform through the self ropes to move in arbitrary positions of the space in the main rack. According to the multi-configuration rope drive parallel robot, position and posture control precision of the rope drive parallel robot and utilization efficiency of robot devices can be improved.

The invention discloses an asynchronous motor frequency converter device with low-voltage ride through capability. An alternating-direct-alternating mode is adopted for a frequency converter, namely, firstly converting a working frequency alternating power supply into a direct current power supply by a rectifier; and then converting the direct current power supply into an alternating power supplywith controllable voltage and frequency through an inversion link and providing the alternating power supply to an asynchronous motor. A diode rectification module in the inner part is switched in after the working frequency alternating power supply is switched in the frequency converter; the alternating current is converted into direct current; the output of a rectifier bridge is switched into aBOOST module; the output of the BOOST module is switched into the input of a DC / AC (direct current / alternating current) inverter module; and the output of the inverter module, serving as an alternating current supply, is directly supplied to the asynchronous motor. Under the normal condition, the BOOST module is not started, when the drop of the power grid voltage is detected, the BOOST module starts automatically, sufficient direct current voltage sources for the inversion link are ensured, and the stable operation of the asynchronous motor is ensured.

A PTO transmission transmits power from an engine-driven shaft to a PTO shaft. The transmission includes a variable displacement hydraulic pump driven by the engine-driven shaft. A planetary transmission unit includes a ring gear driven by the engine-driven shaft, a planet carrier drivingly coupled to the PTO shaft, planet gears rotatably mounted on the planet carrier and in meshing engagement with the ring gear, and a sun gear in meshing engagement with the planet gears and drivingly connected to a fixed displacement variable speed hydraulic motor hydraulically driven by the pump. A one-way clutch is coupled to the sun gear. The one-way clutch allows the sun gear to rotate in only one direction so that at rated engine speed all power is transmitted mechanically.

The invention relates to split-chamber pressure exchangers. Split-chamber pressure exchangers are characterized in that the pressure exchange chambers and the pistons thereof are split in two. Each fluid passes through the corresponding chamber thereof, such that said fluids cannot be mixed. The cross sections of the chambers can be varied in order to vary the transmitted pressure. The reverse line operation can be established and synchronized using a U-shaped tube with telescopic sides and a fixed base filled with fluid or diametrically opposed curved lines, and multiple arrangements can be used. Split-chamber pressure exchangers can be used as surface or well pumping systems and the pumping fluid used can differ from the fluid to be pumped. Different levels of any material can be exploited at any storage site using a chamber with elastic walls filled with fluid and attached to the bottom. Electric power can be generated by centrifuging the pre-pumped fluid.

The invention relates to a method of, and an apparatus for, conveying sheet like products (10, 10′), in particular printed products. In each case two or more products (10, 10′) are gripped together, in the region of their leading edges (10a, 10a′), by grippers (3) of a gripper conveyor (1) such that the edges (10a, 10a′) are alternately spaced apart from one another. In at least one transfer region (4), the products (10, 10′) are transferred to at least one removal arrangement (2) such that each product (10, 10′) at most partially overlaps the previously transferred product (10, 10′), the leading edges (10a, 10a′) of the products (10, 10′) being spaced apart from one another. The invention has the advantage that the products are directly accessible for further processing.

The invention discloses a rust removing and paint spraying device for the inner wall of a pipeline. The rust removing and paint spraying device comprises a bottom plate, rust removing equipment, power equipment and paint spraying equipment, wherein a connecting rod is connected between the rust removing equipment and the power equipment, and a hook is connected between the paint spraying equipment and the power equipment. The rust removing and paint spraying device is characterized in that the power equipment comprises an electricity transmission line and a driving mechanism, the driving mechanism is provided with an electricity inlet interface, and a pantograph is connected to the electricity inlet interface; the electricity transmission line is provided with an elastic insulating layer, a sliding groove is arranged in the insulating layer, and the pantograph is connected in the sliding groove in a sliding manner; an impeller shell is further arranged on the bottom plate, an impeller is arranged in the impeller shell in a rotating manner, and the impeller is driven by the driving mechanism to rotate; the driving mechanism is provided with a plurality of air bag wheels, and the air bag wheels communicate with the impeller shell; and the paint spraying equipment comprises a cylinder, a piston is arranged in the cylinder, one end of the cylinder is provided with a nozzle, and the other end of the cylinder communicates with the impeller shell. Compared with the prior art, the rust removing and paint spraying device has the advantages that the rust removing and paint spraying device can continuously work and uniformly spray a paint on the inner wall of the pipeline.

The invention discloses a tension roll control device for a plate and strip processing line and a tension control method, belonging to the field of tension control of tension rolls on the plate and strip processing line in the metallurgical industry. The tension roll control device comprises a tension roll group, an auxiliary roll frequency converter and a main roll frequency converter, and further comprises an auxiliary roll speed encoder, a main roll speed encoder, a load distributor, a tension regulator, a feedforward compensation unit and a tensiometer, wherein two ends of the load distributor are respectively connected with the auxiliary roll frequency converter and the main roll frequency converter; the auxiliary roll frequency converter comprises an auxiliary roll rotation speed control unit and an auxiliary roll torque control unit; and the main roll frequency converter comprises a main roll rotation speed control unit and a main roll torque control unit. The tension roll control device has the advantages of high control response speed and high control precision. A control method of the tension roll control device comprises the steps of: (1) main / slave load distribution for the tension rolls; (2) complex tension control of the tension rolls; and (C) dynamic compensation. The method has the advantages of small steady state error of a torque loop, short anti-disturbance recover time, constant rotation speed and good anti-disturbance performance.

The present document describes a blade sharpening system comprising a blade sharpening device, a blade holding apparatus and a controller operatively coupled to the blade sharpening device and said blade holding apparatus to control sharpening of said blade, and methods of using the same.

An f-theta lens is composed of a negative lens element of a negative power, and second and third lens elements of a positive power, arranged in this order from the side of a optical deflection device, wherein at least one surface of the lens elements is a cylindrical surface that has a refractive power only in the deflecting direction. The f-theta lens satisfies the conditions: N1>N2=N3, υ1<υ2=υ3, and 4<=|f23 / f1.D0|<=16, wherein N1, N2 and N3 represent refractive indexes, υ1, υ2 and υ3 Abbe constants of the first to third lens elements respectively, f1 the focal length of the first lens element, f23 the composite focal length of the second and third lens elements, and D0 a distance from the optical deflection device to the lens surface of the first lens element.