464results about How to "Increase the moment of inertia" patented technology

A conventional length golf club with a grip including a heavy counterweight, the mass of which is sufficient to cause the center of gravity of the whole golf club to be located within the boundaries of the grip. The counterweight may be an elongated member with a bore through its interior, and in order to achieve the object of placing the center of gravity within the boundaries of the grip, it must have a substantially larger cross-section than the standard-diameter shaft of a golf club. The grip may include a lower support section made of a substantially less massive material than the counterweight. In a preferred embodiment, the grip has an elliptical cross section with the major axis of the ellipse perpendicular to the face of the club head.

The invention discloses a high permeability new energy power grid connection system and stability control method which belongs to the field of a new energy power system. When new energy has high permeability (50% to 100%), a power grid connection system is composed of a prime mover, a motor and a synchronous generator, or is composed of a motor and a synchronous generator. Rotors of the units are coaxially connected. New energy power is transmitted and converted to power the motor. According to the invention, the method is different from a traditional new energy direct grid connection method; a high permeability new energy power system has enough inertia; the frequency stability of the system is improved; the synchronous generator is retained to effectively damp system oscillation; through voltage and reactive power control, the power angle and the voltage stability of the system are improved; the peaking capacity of traditional thermal power and hydropower units and the like is retained; and through coordinated control of the motor, the synchronous generator and the prime mover, the dynamic regulation characteristic of the system is improved.

The invention discloses a flywheel energy storing device. The device includes a vacuum container arranged on the outer layer. A rotary shaft is arranged in the center of the vacuum container. A radial-axial permanent magnetic bearing is nested in the upper end of the rotary shaft. The lower end of the rotary shaft is sleeved with a flywheel, a single-winding outer rotor magnetic suspension switch reluctance motor, and a permanent magnetic bias radial-axial magnetic bearing successively from top down. The rotary shaft penetrates through the center of the flywheel and is connected with the flywheel. The flywheel is nested in an outer rotor of the single-winding outer rotor magnetic suspension switch reluctance motor. According to the invention, by combining that the single-winding outer rotor magnetic suspension switch reluctance motor can drive the flywheel directly and has a high-speed suspension function with that the radial-axial magnetic bearing and a hybrid magnetic shaft have characteristics of controllable suspension in forced uninstallation, five degree of freedom and high-reliability suspension of the flywheel are realized. Besides, operation speed of the flywheel is increased and system power consumption and size are reduced.

The invention provides a body in white bend resistance structure and an arrangement mode thereof. The lower end of a lower vertical plate of a column A is in overlap connection with a sill strip. The upper end of the lower vertical plate of the column A is in overlap connection with an outer plate of the column A. The outer plate of the column A is in overlap connection with an upper beam of a column B. The upper end of an outer plate of the column B is in overlap connection with the upper beam of the column B. The lower end of the outer plate of the column B is in overlap connection with the sill strip. Two to three layers of spot welding connection is formed at each overlap joint to form a closed structure. The bend resistance section of the sill strip, the bend resistance section of the vertical plate of the column A, the bend resistance section of the outer plate of the column A and the bend resistance section of the upper beam of the column B are each in a closed annular shape. Due to the fact that the bend resistance sections form the closed annular shapes and are composed of three or four sheet metal parts, the bend resistance is improved; due to extending sections at the upper and lower ends of the outer plate of the column B, the overlap connection efficiency of the upper beam and the sill strip of the column B and the outer plate of the column B is enhanced, and the bend resistance performance is improved; the transverse and longitudinal staggered closed structure has the effect of enhancing inertia torque, and the bend resistance performance is improved.

The invention discloses a manufacture method of a Z-shaped steel sheet pile through continuous cold roll forming by continuously rolling and forming with a cold bending unit and distributing preliminary shafts at both sides of a central shaft. Web plates are continuous so as to greatly improve the modulus and the flexible rigidity of a cross section and fully exert the mechanical characteristic of the cross section. The manufacture process takes great effects in aspects, such as controlling the quality of the cold-bent Z-shaped steel sheet pile, improving the matched accuracy and the connection strength of the preliminary shafts of the steel sheet pile, and the like. The invention controls the product size and overcomes the defects generated in the processing process by performing the preliminary shafts of the cold-bent Z-shaped steel sheet pile and wholly forming the Z-shaped steel sheet pile.

The invention provides a single column maritime wind power generation device with a circumferential stabilizing column, and belongs to the technical field of ocean energy resource utilization. The single column maritime wind power generation device with the circumferential stabilizing column comprises a wind power generation set, a single column base, the circumferential stabilizing column, a supporting structure, a berthing system and a fixed ballast system; the wind power generation set is fixed on the single column base; the circumferential stabilizing column is fixed at the periphery of the single column base; both ends of the supporting structure are connected with the circumferential stabilizing column and the single column base respectively; the middle part and the bottom of the single column base are connected with the berthing system and the fixed ballast system respectively; and the berthing system is connected with the seabed. By arranging the circumferential stabilizing column, a larger waterline plane inertial moment can be obtained in a smaller waterline plane area; meanwhile, due to the low gravity center of the single column base, the stability requirement is met and the high water power performance is gained; therefore, a stable, economic and flexible floating base is provided for the wind power generation set, so the single column maritime wind power generation device with the circumferential stabilizing column is particularly applicable to deep water regions of the open sea.

The invention provides an undersized log light wood structure composite shear wall, and belongs to the technical field of shear walls. The undersized log light wood structure composite shear wall comprises undersized log composite studs, a wood-based structural board, top beam boards, a bottom beam board and a gypsum board. The undersized log composite studs are vertically arranged, each two adjacent undersized log composite studs are parallel to each other, the upper end of each undersized log composite stud is fixed on the top beam boards, the lower end of each undersized log composite stud is fixed on the bottom beam board, the undersized log composite studs, the top beam boards and the bottom beam board form a wall formwork, the wood-based structural board is fixed on one side of the wall formwork, and the gypsum board is fixed on the other side of the wood-based structural board. Undersized logs are applied in the light wood structure, and the undersized log composite studs substitute for most of dimension stock studs, so that consumption of dimension stocks is reduced, domestic undersized log resources can be utilized fully, cost of the light wood structure can be lowered, and application of the light wood structure in China and particularly in modern rural buildings is benefitted.

The invention relates to a method for regulating and controlling a posture of a spacecraft by the flow velocity and an actuating mechanism thereof and belongs to the field of control to the posture of the spacecraft. The method comprises the following steps that: according to a difference value of a current posture and a desired posture, a three-axis control moment vector required by the spacecraft is obtained, and according to a principle of the momentum moment, a relation between the three-axis control moment vector and the variation of a liquid fuel flowing angular velocity is obtained; according to the working principle of ring-shaped pipe liquid angular momentum exchange equipment, a relation between the liquid fuel flowing angular velocity and the change rate of a velocity vector inthe tangential direction of a pipe when liquid fuel flows is obtained; according to corresponding generated required conditions, the power of the pressure pump is controlled to apply work to the liquid, so that the flow velocity of the liquid is changed, and thus, the angular momentum H of a mass center of the spacecraft is changed and the posture of the spacecraft 10 is changed; and the changed posture is measured by a sensor and is compared with the desired posture and the steps are circularly repeated from the beginning of the step 1. The actuating mechanism for regulating and controlling the posture of the spacecraft by the flow velocity, which is used for implementing the method disclosed by the invention, comprises a liquid filled ring-shaped pipe, the pressure pump, an oil storage tank, a valve, a liquid outlet connecting pipe, a liquid return connecting pipe and a control mechanism.

The invention provides a flywheel energy storage rotor shaft device which comprises an upper bearing, a nonmagnetic shaft, a motor rotor mandril, a motor rotor, a flywheel, a lower end shaft and a lower bearing. A dynamic balance process plate is arranged at the upper end of a motor rotor shaft. Due to the fact that the dynamic balance process plate is arranged at the upper end of the motor rotor shaft, when the flywheel rotates in a high speed, the flywheel can reach balance, vibration in operation is reduced, device noise in the operation is reduced and the whole device can operate stably. Meanwhile, a structure of the flywheel is in a dumbbell shape and stress level of the flywheel is lower than that of a hollow flywheel by 50%. The thickness of an outer flange of the flywheel is increased and rotational inertia of the flywheel is improved.

The invention provides a continuous twining reinforced structure wall pipe. The pipe wall of the continuous twining reinforced structure wall pipe is a spiral circumference; a center line is considered as an axis for specific strip-shaped plastic materials to twine in a spiral manner; the edges of the each adjacent specific strip-shaped plastic materials are overlapped to be integrated with each other to form a continuous solid wall pipe-shaped structure; reinforced adhesive materials which has the same spiral twining form is straddled and pressed on the positions on which overlapping joints of the adjacent specific strip-shaped materials are positioned; a specific single wall corrugated pipe which has the same spiral twining form is straddled and pressed on the reinforced adhesive materials; a strip-shaped material which has the same spiral twining form straddles the specific single wall corrugated pipe in a pressing manner, and adhesive to the pipe wall through a pressing wheel mechanism.

The invention discloses a flywheel motor adopting a no-cross one-range winding, relating to the technical field of the motor and solving the problems that the existing flywheel motor has complex structure, large power consumption and poor moment stability. A rotor in the invention is a wheel body of a flywheel; an outer rotor iron core and an inner rotor iron core of the rotor are fixedly connected on a torque output shaft; a no-iron core frame type stator is fixed between the inner rotor iron core and the outer rotor iron core; permanent magnets are fixed on the inner rotor iron core or the outer rotor iron core and the side wall corresponding to the no-iron core frame type stator; a winding of the no-iron core frame type stator consists of a plurality of groups of planar coils which areevenly distributed and fixed on the side wall of the frame; two adjacent groups of planar coils have an electric angle of 240 degrees, and have no cross; three position sensors are respectively fixedon the frames at the central positions of three adjacent groups of planar coils; and the ratio of the number Z of the planar coils and the number 2p of poles of the permanent magnets is 3 / 4. The flywheel motor is applicable to the technical fields of posture control of the satellites and control moment gyros and the like.

A Co-Ni-base alloy, being characterized in that a composition of the alloy comprises at least Co, Ni, Cr, Mo, W and Fe, and percentages by weight of the composition are from 25% to 45% of Co, from 25% to 40% of Ni, from 18% to 26% of Cr, from 3% to 11% of Mo, from 0.5% to 9% of W, wherein a sum of Mo and W is from 4% to 13% by weight, and from 1.1% to 5% of Fe.

The invention relates to a novel load-bearing and heat-insulation integrated prefabricated fabricated-type shear wall and a construction method, and belongs to the technical field of fabricated-type building construction. The novel prefabricated fabricated-type shear wall comprises an inner blade plate, an outer blade plate, a heat-insulation structure layer and a plurality of connecting pieces made of fiber reinforced plastic, wherein both the inner blade plate and the outer blade plate are provided with vertically-distributed steel bars and transversely-distributed steel bars. A restrained edge member area is provided with longitudinal stress steel bars, stirrups and first steel sleeves. According to the novel prefabricated fabricated-type shear wall, the thickness of a wall body is reduced, so that the effective usable area of a building is increased, the structures of the inner blade plate and the outer blade plate are optimized, so that the two sides of the heat-insulation structure layer are effectively protected, and the connecting pieces and the stirrups adopt the fiber reinforced plastic, so that heat-insulation performance of the heat-insulation structure layer is improved; and meanwhile, the wall body has excellent mechanical properties. The construction method has the advantages of being simple in operation, high in construction efficiency and the like.

The invention relates to a diaphragm spring for a normally open type clutch, belonging to the technical field of the automatic clutch of the automobile. The diaphragm spring is of disc-shaped structure and comprises a disc-spring part, a plurality of jointing finger parts and a plurality of stress releasing holes, wherein the plurality of jointing finger parts with the same structure are centrally symmetrical by the center of a circle of the diaphragm spring; and the outer ends of the jointing finger parts are fixedly connected with the disc-spring part which is provided with the plurality of stress releasing holes along the peripheral direction. The diaphragm spring not only reserves the advantages of being capable of reducing resilience force and having zero rigidity in a wearing route of a frictional plate, but also overcomes the problem of overlarge pressure, thus leading the elastic deformation of a thrust plate and a housing to decrease, leading the starting operation of an executive device to become easy and leading the load borne in the process of the executive device to obviously decrease.

The invention discloses a flying wheel energy storage type rivetless connection device of a servo motor and a connection method of the connection device. The connection device comprises a motor, wherein an output shaft of the motor is connected with a shaft; a flying wheel is fixed on the shaft; a clutch is connected together with the flying wheel; the clutch is fixed at an optical shaft end of a screw rod; a screw rod nut is fixed with a nut sleeve; the nut sleeve is fixed on a sliding block; the sliding block is configured on a guide rail; the guide rail is fixed on a rack; a punch head is connected with the nut sleeve; a plate material is placed on the rack below the punch head; the rack is provided with a die cavity; the motor drives the flying wheel, the clutch and the screw rod to do rotary movement; the flying wheel stores energy for increasing the rotary inertia, and the rotary movement of the flying wheel is converted into the linear movement by the screw rod nut; the flying wheel is separated from the clutch the moment the punch head is in contact with the plate material, and the screw rod transmits a torque for driving the punch head to do linear impact movement for punching the plate material; and when the deformation amount reaches the expected requirement, and the plate material is filled in the die cavity of the rack, and the connection is finished. According to the flying wheel energy storage type rivetless connection device, the connector bonding quality and the production efficiency are guaranteed, and the connection device has the advantages of time-saving, labor-saving and energy-saving.

The invention relates to a cantilever mechanism for piezoelectric power generation. The cantilever mechanism comprises a base (1), an elastic substrate (2), a piezoelectric material thin sheet (3), mass blocks (4) and a wire, wherein one end of the elastic substrate (2) is connected with the base (1), the piezoelectric material thin sheet (3) is laminated with the elastic substrate (2), the mass blocks (4) are arranged at one end, far away from the base (1), of the elastic substrate (2), an electrode (31) and an electrode (32) are arranged on the surface of the piezoelectric material thin sheet (3), an electrode cutting line (33) is arranged between the electrode (31) and the electrode (32), the electrode cutting line (33) is formed in an area in a middle line in the direction from the base (1) to the mass blocks (4), wherein the electrodes are not arranged in the area. The mass blocks (4) are symmetrically distributed and arranged relative to the electrode cutting line (33), and the cantilever mechanism for piezoelectric power generation has multi-mode characteristics and broadband characteristics.

The invention discloses a method for improving the stability of a virtual synchronous machine grid-connected inverter system with the consideration of sampling delay. The method comprises the steps: establishing a small signal state space model of a VSG grid-connected inverter system; analyzing the structure of the VSG grid-connected inverter system, and determining the position of a delay link; determining a small signal state space equation of each link in the VSG grid-connected inverter system; establishing a small signal state space delay correction model of the VSG grid-connected invertersystem according to the small signal state space model of the VSG grid-connected inverter system and the small signal state space equation of each link of the VSG grid-connected inverter system; on the basis of the delay correction model, analyzing the stability of the VSG grid-connected inverter system, and determining a control parameter value range capable of enabling the VSG grid-connected inverter system to stably operate, thereby improving the stability of the VSG grid-connected inverter system. The problem that an existing VSG model is not accurate enough is solved, and the problem that the stability of the VSG grid-connected inverter system is not high due to the fact that the stability of the VSG grid-connected inverter system is analyzed on the basis of an ideal VSG model is solved.

The invention discloses a crude stalk chopper capable of automatically adjusting the feeding height, which comprises a chopper component, a feeding mechanism (4) and the like. The chopper component comprises a chopper shell (2), a movable tool holder (8), a movable blade (9), a hammer leaf (14) and a fixed blade (10) which are arranged in the chopper shell (2), wherein the fixed blade (10) is fixedly connected with a rack (7), the movable blade (9) and the hammer leaf (14) are both fixedly connected with the movable tool holder (8), the movable tool holder (8) is connected with a power shaft (51), and the power shaft (51) is connected with a motor (6) through a belt transmission case (5); a throwing device (1) which is arranged above the chopper shell (2) is communicated with the outlet of the chopper shell (2); a feeding trough (3) is communicated with the inlet of the feeding mechanism (4), and the outlet of the feeding mechanism (4) is communicated with the inlet of the chopper shell (2). The chopper is applicable to the chopping of cotton stalks, mulberry twigs and other kinds of crude stalks.

The invention relates to the arrangement of a battery, which provides an electric motorcycle capable of preventing the complexity of the body structure and ensuring the good driving performance thereof.The electric motorcycle (1) comprises a motor (50) for applying the rotation driving force on the trailing wheel (WR) thereof, a battery (30) for providing electric power to the motor (50), a FET electromotor driving part (60) for driving the motor (50),a control base board (40) for controlling the FET electromotor driving part (60),and a swing arm (20).The shaft of the swing arm mounted on themotorcycle body in a freely swinging way supports the rear wheel (WR).The swing arm accommodates the motor (50), the FET electromotor driving part (60) and the control base board (40).The battery (30) arranged inside the swing arm (20) is close to the swinging axle (21) of the swing arm (20).The battery (30) is in an elongated shape and the length direction of the battery points to the width direction of the motorcycle.The FET electromotor driving part (60) and the control base board (40) are arranged in a non-overlapping way when the motorcycle is viewed from the side thereof.

The invention relates to a multi-locomotive fixing and rolling test platform which comprises two or three test platforms. Each test platform comprises a pair of counter-force frames (1), an upper axle (2) and test unit groups, wherein the test unit groups comprise test units having same number with single locomotive wheel pairs (41). All the test units adopt the structure that shafts of a track wheel pair (43) for supporting the locomotive wheel pairs (41) are connected with shafts of winding asynchronous motors (36), and the diameter / length ratio of the winding asynchronous motors is larger than 1; stator windings of all the winding asynchronous motors (36) of each test unit group are connected with a power grid by a three-phase switch I (63) of a stator three-phase bus bar (53) of each asynchronous motor, and rotor windings are connected in parallel to a rotor three-phase bus bar (49) of each asynchronous motor; and the rotor three-phase bus bars of the asynchronous motors of all the test unit groups are connected by a breaker (62). The test platform carries out a mutual accompanying test by multiple locomotives and has reliable synchronization and convenient test and can form the mutual feedback of energy, reduce the capacity of a power supply and save energy sources and cost.

The invention discloses a flying saucer and two smoke- and fire-free engines. The flying saucer is composed of a cabin and a disk which rotates round the cabin. The disk includes a disk-shaped wing and a rotary engine. The cabin includes a driving cabin, a passenger cabin and a device cabin. The rotary engine sucks air which is mixed with water, and then the mixture is jetted out horizontally through jet tubes installed on the edge of the disk according to the sprayer principle, so that a generated reactive force enables the disk to rotate at a high speed, thereby generating an upward raising force on the disk. Four fixing wings are installed outside the device cabin to eliminate reverse rotation of the cabin. A vector engine and a diesel power generating set are installed in the device cabin under the disk. The vector engine sucks large amount of air through an air inlet duct in the passenger cabin to form vacuum above the passenger cabin, which enables air pressure difference between an upper surface and a lower surface of the disk to be increased, thereby generating a huge raising force. The sucked air is compressed to form high-pressure gas which is discharged into vector jet tubes and is jetted out, wherein the directions and the angles of the vector jet tubes are adjustable to generate pushing forces in different directions, thereby achieving maneuvering flight of the flying saucer.

The invention relates to a momentum wheel based on a disc type structure. The momentum wheel comprises a lower layer stator and an upper layer stator, wherein the upper layer stator and the lower layer stator are fixed in parallel; an air gap is formed between the upper layer stator and the lower layer stator; a rotor is arranged in the air gap; a mass block is arranged at the outer side of the rotor; the upper and lower planes of the inside are provided with annular sector grooves in the radial direction; a permanent magnet is fixed in each groove; the magnetizing directions of the permanent magnets at the upper and lower layers are identical; the N poles and the S poles are alternately arranged; stator tooth grooves are formed in the upper layer stator and the lower layer stator; a coil is wound in each stator groove; the stators are fixed with the outer sides of bearings; the center of the rotor is a motor middle shaft; the bearings sheath the middle shaft; and the top of the middle shaft is provided with a photoelectric encoder. The momentum wheel has the advantages that in the moving process, the input is a three-phase power supply; a permanent magnet motor of an axial magnetic field structure is used, the momentum wheel can output great torque; by using the disc type structure of the momentum wheel, the structure of the momentum wheel is compact, and the axial size of the momentum wheel is effectively reduced; fractional-slot structure windings are used, so that the tooth groove torque of the momentum wheel can be effectively reduced, and the movement of the momentum wheel is smooth and stable; and meanwhile, the photoelectric encoder is used, so that the rotation condition of the momentum wheel can be precisely measured.

An anti-buckling supporting member with a lattice type double-rectangular-pipe cross section comprises two anti-buckling branches which are connected through a plurality of steel batten plates, wherein each branch adopts an anti-buckling supporting member provided with a linear core and a restraint concrete-filled rectangular steel pipe; long edges of the two branches are parallelly arranged at appropriate intervals, a lattice type member formed by connecting the plurality of steel batten plates which are distributed longitudinally is taken as a whole for common work, the steel batten plates and branch short edges, namely short edges of the restraint rectangular steel pipes, are in welded connection through trihedral angle welding seams; and end parts of the linear cross section cores of the two branches extend out of circumferential restraint members, and are connected through a ribbed plate to form an H-shaped cross section which can be connected with a frame member through a high-strength bolt and a connecting plate. The lattice type cross section can increase inertia moment of the whole cross section of the anti-buckling supporting member and the whole flexural rigidity, thereby particularly suitable for a design of a large-tonnage anti-buckling support member, the support end part is conveniently connected with the frame member, and the lower branch still can sufficiently play energy-dissipating capacity when eccentric bending moment is added.

The present invention relates to beam crane, and is especially one kind of self-repaired pre-stressed beam crane and the method of applying external pre-stress to repair the downwards bent beam of beam crane. The method of the present invention includes the following steps: 1. fixing stretching bearing and fixed bearing separately on two ends below the lower cover of the crane beam; 2. stringing steel strands separately in the fixing anchor beside the fixed bearing and the stretching anchor beside the stretching bearing to anchor the fixed end and to pressing the stretching anchor to the outer side of the stretching bearing; 3. regulating the initial stress of each steel strand with jack for equalized stress; 4. fixing 1-4 staying devices on the lower cover of the crane beam and setting the steel strands; and 5. stretching the steel strand of the stretching anchor with jack for the beam to bend upwards, anchoring the stretching end and regulating the staying devices for proper stress.

The invention relates to the technical field of aircrafts, in particular to a cradle head used for carrying an imaging device on an aircraft. The cradle head comprises a course shaft motor, a transverse rolling shaft motor, a pitch shaft motor and a controller. The course shaft motor and the transverse rolling shaft motor are connected through a first connecting shaft arm. The transverse rolling shaft motor and the pitch shaft motor are connected through a second connecting shaft arm. The controller is located below the course shaft motor or on the aircraft. According to the cradle head, since the controller is arranged below the course shaft motor, the overall mass of a structure below the course shaft motor can be increased; after the mass of the structure below a course shaft is increased, the rotational inertia of the course shaft is increased accordingly, and then the problems that the rotational inertia of the course shaft is small and stability cannot be improved are solved. Meanwhile, the controller is a necessary component of the cloud platform and avoids increase of the overall mass of the cradle head while increasing the overall mass of the structure below the course shaft motor, thereby further ensuring low overall mass of the cradle head.