139results about How to "Reduce axial load" patented technology

A fastening system including a two piece swage type fastener including a pin and a collar in which the pin has relatively wide lock grooves and in which the lock grooves have a generally smooth root contour with the collar having a shank portion with a wall thickness defining an excess volume of material prior to swage greater than the volume of the confronting lock grooves and with the clearance between the inside diameter of the collar shank portion and the diameter of crests of the lock grooves being a minimum to reduce the compressive force required to swage the collar shank into the lock grooves and with the excess volume of collar shank material providing only a partial fill of the lock grooves upon swage.

An electric machine (10) has a disk-shaped rotor (24) disposed in an operating space between two opposing stator assemblies (11, 12) to provide two axial air gaps (15, 16). The rotor (24) has a hub (28) and an outer ring (26) of non-magnetic material and is further provided with a plurality of permanent magnetic elements (25) for coupling flux that is induced by the magnetic field of the stator assemblies (11, 12). The permanent magnetic elements (25) are spaced apart and reluctance poles (27) are positioned in spaces between the magnetic elements (25) to couple additional flux induced by the magnetic field of the stator assemblies (11, 12). Various constructions and shapes (40-45) for the PM magnetic elements (25) are disclosed, and including PM covers (60) of ferromagnetic material for enhancing q-axis flux in the air gaps (15, 16) and for reducing harmonics where toothed stators are used. Methods of providing increased torque using the the various rotor constructions are also disclosed.

Methods and transducers for producing acoustical signals having a spiral wavefront with omnidirectional magnitude and a phase that varies with angle and transducers for producing broadband omnidirectional reference signals for underwater navigation and communication.

An integrated sheath assembly for inserting f a medical device such as a percutaneous pump into a vessel can include a first sheath having a first lumen defining a first opening between proximal and distal ends of the first sheath for passage of a portion of the pump and a second sheath having a second lumen defining a second opening between proximal and distal ends of the second sheath. The second lumen is expandable to allow passage of the first sheath containing the portion of the pump. The first sheath fills a space between the second sheath and the portion of the percutaneous pump when the first sheath containing the percutaneous pump is inserted into the second lumen. The first sheath has a first hub, and the second sheath has a second hub. In some embodiments, a single sheath and a movable connector can be integrated on the medical device.

A Darrieus rotor supported by a bearing system to rotate about a vertical axis for capturing wind energy has an alternator that is directly-driven by the rotor and converts rotational power from the rotor into electrical power. An electronic controller controls the electrical load applied to the alternator and the power output from the alternator to an output. The alternator is constructed having a substantially constant reluctance torque for all angular positions of rotation of the rotor. The bearing system includes upper and lower rolling element mechanical bearings that provide radial support of the rotor against wind load and axial support of the rotor, and a magnetic bearing that provides axial lift that reduces the axial load on the mechanical bearings and reduces the starting torque for rotating the rotor. The electronic controller applies minimal electrical load to the alternator until the rotor is at a rotational speed greater than a deadband for the rotor in the instantaneous wind speed, whereby the electronic controller, the alternator and the bearing system together avoid retarding forces that would otherwise prevent passive self-starting.

The invention provides an ore crushing machinery without adding a crushing medium, which is a dry crushing machinery with a tower type structure; a rotating part is in the form of a longitudinal rotating shaft; one or more impeller main bodies are mounted on a shaft in series; a plurality of replaceable wear resistant blades and surface protective plates are arranged on each impeller main body, so that the impeller main body forms a rotor impeller group assembly with single-layer or multi-layer blades; a wear resistant lining layer, which comprises an upper lining plate, a material guide lining plate, an arc main lining plate, a bottom lining plate, a wear resistant fixing ring and so on, is correspondingly arranged on the periphery of each impeller; an interior cavity of each impeller forms a crushing chamber; and the crushing chambers in various stages are communicated with each other in a vertical direction. The ore crushing machinery provided by the invention has the advantages of high one-time crushing efficiency, high fine powder qualified rate, convenience in controlling, wide inlet material particle range, long service life, convenience in maintenance and no dust and noise pollution, and is very suitable for ore dressing metallurgy and architectural material industries; and standard dry powders or ore pulps can be directly produced, so that the production process is greatly simplified and production cost is reduced.

The present invention relates to a double-suction microminiature paddle pump. It is characterized by that its pump paddle wheel and motor rotor are formed into one body, the centre of said motor rotor is equipped with two paddle wheel inlets which are respectively communicated with pump paddle wheel, the cross-sectional area of said two inlets is progressively expanded along flowing direction; said two paddle wheel inlets ar respectively communicated with two suction inlets of pump. Said pump has no need of mechanical drive shaft, and can implement high-effective and safety conveyance.

Disclosed is a supercharged electric servo deep-drawing cushion. At least one supercharged electric cylinder is fixed on the bottom of a body of a press; pistons of the supercharged electric cylinders are connected with the bottom of a top crown; one end of a material ejecting rod is connected with the top crown; the other end of the material ejecting rod is connected with a blank holder; and each supercharged electric cylinder is an alternating-current servo electric cylinder which has functions of an electric cylinder and functions of a supercharged cylinder. The supercharged electric servo deep-drawing cushion has a deep-drawing action and a material ejecting action; after the supercharged electric servo deep-drawing cushion is combined with an upper mold or a lower mold of the press, the optional blank holder force required for tensile deformation of workpieces can be realized, and mechanical energy is transformed into electric energy in a deep-drawing process. The supercharged electric servo deep-drawing cushion is simple in structure and low in failure rate; the supercharged electric cylinders has the functions of the electric cylinder and the functions of the supercharged cylinders, so that the working load of the supercharged electric cylinders is greatly reduced; and the supercharged electric servo deep-drawing cushion which is integrated in design is compact in structure.

The invention discloses an annular pressure downhole control valve, and belongs to the technical field of oil-gas well engineering. The annular pressure downhole control valve is designed to solve theproblem of annular pressure anomaly in an oil-gas well. The annular pressure downhole control valve comprises a coupling and an outer cylinder which is in fit connection with the coupling; the coupling and the outer cylinder are matched to form a first accommodating cavity and a second accommodating cavity, the first accommodating cavity communicates with a casing pipe, and the second accommodating cavity communicates with the exteriors of the first accommodating cavity and the casing pipe to form a one-way flow channel; and the second accommodating cavity is internally provided with a valvecore which can move along the inner wall of the second accommodating cavity to open or close the one-way flow channel. According to the annular pressure downhole control valve, the abnormal annular pressure in oil-gas well completion and production engineering can be alleviated, integrity and production safety of a wellbore are ensured, the structure is simple, the machining cost is low, and the cost of controlling the annular pressure can be effectively reduced.

A pipe part ( 100 ) for conveying a solid particulate material, comprising an outer tubular element ( 1 ) stretching along a longitudinal axis (A) and having first ( 9 ) and second ( 12 ) sections axially displaced from each other. An inner tubular element ( 20 ) is disposable inside the outer tubular element ( 1 ) and adapted for longitudinally conveying the solid particulate material from one end to another end. The inner tubular element ( 20 ) comprises an aeration-fluid-permeable wall part ( 23 ), and is sealingly connected with-and flexibly supported by-the first and second sections ( 9,12 ) to form an aeration fluid distribution chamber ( 40 ) between the first and second sections ( 9,12 ) and the inner ( 20 ) and outer ( 1 ) tubular elements. The aeration fluid distribution chamber ( 40 ) is provided with an aeration fluid inlet ( 15 ) to define an aeration fluid flow path ( 19 ) between the aeration fluid inlet ( 15 ) through the aeration-fluid-permeable wall part ( 23 ) via the aeration fluid distribution chamber ( 40 ).

The handpiece (1) includes at the front a collet (10) arranged for strongly gripping the shank of a removable tool housed in guide bores (23, 25). The collet includes two or several arms (26) attached to an annular part (22) of the collet to grip the tool shank. Preferably, the collet arms are levers each having a support surface which is far from the jaw (20) and on which a gripping mechanism (17) exerts a force which is multiplied by the lever. The gripping mechanism includes a sliding sleeve (40) having an inner conical surface (44) which produces said force on the collet levers via balls (45). This arrangement enables a smaller gripping spring (42) to be used, or such spring to be omitted. The balls (51) of the releasing mechanism are guided in helical slots (57) having a flexible lateral strip (58) which holds the gripping mechanism in position via a snap fit.

The invention belongs to the field of vehicle shock absorbing equipment and particularly discloses a gear and rack shock absorber. The gear and rack shock absorber comprises a supporting box and a rack. The supporting box is provided with a slide hole for the rack to pass through. A motor and a rotating shaft are further arranged in the supporting box. A first belt wheel is installed on an output shaft of the motor. One end of the rotating shaft is provided with a gear meshed with the rack. The other end of the rotating shaft is provided with a second belt wheel. The first belt wheel and the second belt wheel are connected through a belt. A displacement sensor is arranged over the rack. A controller is further arranged in the supporting box. The controller is electrically connected with the motor and the displacement sensor.

A method is provided for manufacturing a compound helically toothed planet gear for a planetary gear set wherein the individual gear elements of the compound planet gear have different leads. The method identifies and utilizes the several factors affecting gear timing for compound helical planet gears having different leads to provide planet gears capable of attaining equal load share among the several gears of the planetary gear set. Specifically, the method of the present invention utilizes a mounting shoulder and bore axis to provide common locating features for use throughout the manufacturing process The method further provides for bore honing and removal of equal amounts of material from both sides of each gear tooth in the gear finishing process so as not to alter gear timing between the compound gear elements.

The invention discloses a motor cooling structure of an immersed pump. The motor cooling structure comprises a sealing member, a cooling coil, a circulation impeller, a circulation guide vane and an adjusting device, wherein the adjusting device is communicated with a motor shell; the cooling coil is installed outside the motor shell and immersed inside an sucking channel of the pump body; the upper end of the cooling coil is communicated with the sealing member and the lower end is communicated with the adjusting device; the sealing member is a hollow shell with a reinforced circulation chamber; and a circulation impeller and a circulation guide vane are installed inside the reinforced circulation chamber. The motor cooling structure has the benefits that the motor temperature rising problem is solved; the cooling liquid has a lubrication function to the motor; the motor has strong circulation stability and can work for a long term without changing the cooling liquid; so that the cooling condition of the motor is significantly improved and the period for changing the cooling liquid is prolonged; and the axial load of a main pump bearing is reduced, so that the reliability and the stability of the motor operation are effectively improved. As a result, the operation environment of the motor is improved, the service lives of components and maintenance period of equipment are prolonged; and the expense of a whole project is saved.

The invention discloses a separated reaction flywheel body. The separated reaction flywheel body comprises a wheel rim, a wheel spoke, adjusting gaskets and a wheel hub, wherein the wheel rim is in coaxial clearance fit with the wheel spoke and connected with the wheel spoke through bolts; the wheel spoke and the wheel hub form an integrated structure through a welding process; the adjusting gaskets are nonmetal epoxy glass cloth plates, are clamped between the wheel spoke and the wheel rim and are used for adjusting damping coefficient of the whole wheel body and suppressing resonance amplification of the wheel body during working under a vibration environment. The wheel rim adopts an annular cylinder structure, and screw holes are formed in the internal side of the cylinder and the wheel rim can be coaxially connected with the wheel spoke through screws. The wheel rim is the far end of the wheel body in a radial direction and is made of a high-density stainless steel material so that the rotation inertia can be increased as much as possible. Central shallow holes are formed in the centers of two end surfaces of the wheel rim and used for reducing weight to realize dynamic balance. The separated reaction flywheel body disclosed by the invention is advantaged in that the machining process of the separated reaction flywheel body is simple, the structural strength / mass ratio and structural stiffness / mass ratio of the separated reaction flywheel body are high and the mass of the separated reaction flywheel body is obviously reduced; therefore, the axial load of the reaction flywheel is reduced and the reliability of the reaction flywheel is improved.

The invention relates to a ring roller milling device, comprising a mill ring, a roller, a roller shaft, a roller arm, a mill shell, an oil cylinder and a reductor connected together. One end of the roller is fixedly connected with the roller arm which is connected with a fulcrum shaft, and the other end is connected with the roller arranged in the mill ring. The mill ring is a ring provided with a bottom; a curved groove is arranged on the inner wall circling the ring, and the groove structure matches the roller; during no-load operation, the central line of the roller is vertical with the bottom surface of the mill ring, and the roller is tangent with the curved groove of the inner wall of the mill ring; the distance of shaft centers is equal to the maximum diameter of the roller. The invention has the advantages of high compactness of the burden bed and low material fluidity; burden-bed milling of powder material can be realized and the milling efficiency is relatively high.

The invention discloses an automatic spinning bobbin replacing device which comprises a mounting plate and two round baffle plates. Two ends of the mounting plate are of symmetrical hollow arc-shapedstructures, the two round baffle plates are fixedly mounted on the inner side walls of the hollow arc-shaped structures, separately, a placing table is fixedly arranged in the middle of the mounting plate, reciprocating mechanisms are arranged in the two round baffle plates, two wiring mechanisms are symmetrically arranged on the placing table, each reciprocating mechanism comprises a straight rod, and two ends of each straight rod are fixedly connected to rolling balls. The automatic spinning bobbin replacing device is simple in structure. A bobbin can reciprocate by means of simple devices such as the straight rod and a connecting rod. When the bobbin moves to a special position, a gear bank can drive the bobbin to rotate to connect yarns for spinning on the two bobbins together througha twister, so that the spinning bobbin is replaced automatically. The replacing speed is higher, and ceaseless production can be achieved.

A machine room-less elevator apparatus which enables to reduce an installation space and whose cost can be reduced. The elevator apparatus has an elevator car (4), a counterweight (5), a guide rail (6) for the car, a guide rail (7) for the counterweight, a rope (8) for suspending the car and the counterweight, a sheave (9a) placed at an elevator shaft top section (3) and over which the rope (8) is passed, a motor (9b) for driving the sheave, and a hoist (9) for lifting and lowering the car and the counterweight. The elevator apparatus further has car sheaves (19, 20) arranged at the elevator shaft top section (3), a car suspension sheave (13) provided under the car (4), a counterweight sheave (30) provided at the elevator shaft top section (3), and a counterweight suspension sheave (15) provided at the counter weight (5). The rope (8) is connected at one end to a position near the center of the upper part of the car, passed over a hoist sheave (9a) after it is passed over the car sheaves (19, 20) and the car suspension sheave (13), and suspended via the counterweight suspension sheave (15) and the counterweight sheave (30). The other end is connected to a position near the center of the upper part of the counterweight (5).

The invention discloses a method and a system for increasing damping of a transmission chain of a variable-speed wind power generator. The method for increasing the damping of the transmission chain of the variable-speed wind power generator comprises the following steps of obtaining the rotation speed of a high-speed shaft of the variable-speed wind power generator; performing high pass filtering on the rotation speed of the high-speed shaft to obtain the filtered rotation speed; performing phase compensation calculation on the filtered rotation speed to obtain the compensated rotation speed, and performing amplitude-limited filtering on the compensated rotation speed; according to the preset damping increase proportion coefficient, the compensated rotation speed after amplitude-limited filtering, and the electromagnetic torque before damping increase of the transmission chain, calculating the electromagnetic torque after the damping increase of the transmission chain. The method and the system for increasing the damping of the transmission chain of the variable-speed wind power generator have the advantages that the damping effect is effectively increased, the resonance of the system is eliminated, and the axial load of the wind power generator is reduced.

Provided is an eight-ball fixed type constant velocity universal joint of an undercut free type, which is capable of increasing a torque capacity at high operating angles while securing durability at low operating angles. When a distance between a center of a track groove (32) and a center of a ball (37) is denoted by Rt, and when an axial distance between the center of the track groove (32) and a joint center plane (P) is denoted by F, a ratio R1 of F to Rt is set to fall within a range of 0.061≦R1≦0.087. When a radial offset amount, which is a distance between the center of the track groove (32) and a joint center axial line (X) is denoted by fr, a ratio R3 of fr to Rt is set to fall within a range of 0.07≦R3≦0.19. When an effective cured-layer depth with Hv 513 is denoted by Di and the diameter of the ball is denoted by d, a bottom surface of a track groove of an inner joint member includes a cured layer with an effective cured-layer depth ratio Di / d of at least 0.111 or more.

Methods and transducers for producing acoustical signals having a spiral wavefront with omnidirectional magnitude and a phase that varies with angle and transducers for producing broadband omnidirectional reference signals for underwater navigation and communication.

The invention discloses a method for constructing an independent pile tower crane foundation supported on an excavation slope. The steps are as follows: geologic drilling analysis is carried out on the excavation slope to draw up a construction scheme; according to the scheme, holes are dug on the excavation slope, water is pumped during the operation of digging the holes, retaining wall moulding boards are supported, and concrete retaining walls are cast. The diameter of each hole bottom is enlarged, and backing concrete is cast to form an expansion head. Independent supporting piles and the tower crane bearing foundation are cast by the concrete, the diameter of the independent supporting pile is equal to or larger than 1.42 times of the side length of each standard knot of a tower body, the depth of the independent supporting pile is equal to or larger than 1.5 times of the height of a pile foundation suspension arm, and the top face of the tower crane bearing foundation is lower than a natural terrace. The construction method has the advantages of low production cost, reliable quality, simple machines and equipment, convenient construction and operation and higher single-pile bearing force, thereby meeting the requirement of casting the tower crane bearing platform foundation; and the construction method has no noise during construction, no discharge of mud solution, little effect on ambient environment and buildings and small space occupation.

The invention relates to an engine turbine and compressor rotor connection and torque transmission device which comprises a compressor rotor, a turbine rotor and a connecting screw.The compressor rotor is provided with an inner spline.The turbine rotor is provided with an outer spline matched with the inner spline of the compressor rotor.One end of the connecting screw is provided with a thread and installed in an inner cavity of the compressor rotor, and the other end of the connecting screw is provided with a step and clamped on a step of an inner cavity of the turbine rotor.An outer spline is arranged on the step of the connecting screw and matched with the inner spline on the inner cavity of the turbine rotor.The outer spline on the connecting screw is of a hollow structure and is axially provided with six evenly-distributed through grooves.The device can be smoothly installed and detached and has the advantages of being simple in structure, stable in connection, low in cost, reliable in work, convenient to install and the like.