35results about How to "Meet different load requirements" patented technology

The invention discloses a freight truck frame, which comprises longitudinal beams, side beams and a penetrating beam with a concave-convex structure. The penetrating beam penetrates the longitudinal beams and is connected with the side beams; a top end face of the penetrating beam is flush with those of the longitudinal beams and the side beams; a plurality of mounting parts which are recessed towards the bottom and extend transversely are arranged on the penetrating beam opposite to the longitudinal beams in a matching mode; the longitudinal beams are connected to the mounting parts; and the cross section of the penetrating beam is bilaterally symmetrical relative to a transverse centre line of the penetrating beam. The freight truck is provided with the freight truck frame. The freight truck and the freight truck frame reduce the dead weight of the whole truck, increase the stress section and enhance the bending resistance and torsion resistance, and can meet different load requirements.

The invention discloses a high-rigidity light launching box and relates to a launching box used for supporting, fixing, transporting and storing missiles. The high-rigidity light launching box is high in both circumferential rigidity and longitudinal rigidity and light and can provide large storage space for the missiles, and the stress on the corners of the launching box can be effectively diffused. The high-rigidity light launching box comprises an outer skin, an inner skin, longitudinal ribs and ring ribs evenly distributed between the outer skin and the inner skin. The ring ribs are connected with the outer skin and the inner skin through glue respectively, the ring ribs are installed on the inner skin in a sleeved mode, small rounded corners are adopted for the corners of the inner skin, the outer skin and the ring ribs, the space between the inner skin and the ring ribs is filled with a heat preserving layer, reinforcing blocks are arranged on the corners of the heat preserving layer, filling interfaces are arranged on the longitudinal ribs, a 35-degree laying layer is adopted for the inner skin, the longitudinal rib laying layers and the ring rib laying layers respectively comprise 0-degree laying layers and 90-degree laying layers, the proportion of the laying layers of the longitudinal ribs is as follows: n 0 degree: n 90 degrees= 2:1- 3:1, and the proportion of the laying layers of the ring ribs is as follows: n 90 degrees: n 0 degree= 2:1- 3:1.

The invention discloses a device and method for performing distributed energy utilization on molten salt stored energy and belongs to the technical field of photo-thermal power generation. The device comprises molten salt heat storage tanks and a steam generator, and the molten salt heat storage tanks are internally provided with electric heaters, drainage pipes and molten salt pumps; the steam generator is provided with a heat source inlet, a heat source outlet, a cooling water inlet and a stream outlet; the electric heaters are connected with electric signal processing equipment through wires; the drainage pipes are connected with the heat source outlet through first pipes, and the molten salt pumps are connected with the heat source inlet through second pipes; the cooling water inlet is connected with a water source through a third pipe; and the steam outlet is connected with a steam turbine, a steam converter, a heating heat supply network and a lithium bromide unit correspondingly through fourth pipes. By means of the device, renewable resources can be effectively utilized, the energy comprehensive utilization rate is high, the occupied area is small, the cost is low, emission of various pollutants is reduced, and good economic and social benefits are achieved.

The invention discloses a rotor wing lifting mechanism for coaxial double rotor wings. The rotor wing lifting mechanism comprises a lifting shaft inner control system, a lifting shaft torque transmission system, a lifting shaft guiding and positioning system and a lifting shaft lifting power system which are independent of a transmission system and can slide up and down. The invention further discloses a flight device provided with the rotor wing lifting mechanism. The height size of the coaxial double-rotor helicopter is variable, and the coaxial double-rotor helicopter is more suitable for vehicle-mounted transportation and ground and ship-borne storage; the coaxial type double-rotor flying car is low in gravity center and small in windward resistance during ground running, the stabilityand reliability of the system are improved, the vehicle running design requirement is met, and the vehicle road running standard is met; and the blades with different diameters can be quickly matchedby adjusting the distance between the rotors, so that different load requirements are met, and the aerodynamic efficiency of the coaxial double-rotor helicopter is optimized.

The invention discloses a three-phase digital generator which is particularly applied to a three-phase non-equilibrium and non-linear load. The three-phase digital generator comprises an engine, a three-phase permanent magnet generator or three (three groups of three-phase generator windings), three three-phase rectifying and voltage-stabilizing modules, three DC/AC converters, three LC filters and a rectifier bridge. The three-phase digital generator is characterized in that the three-phase permanent magnet generator can be composed of a stator and a rotor or three stators and three rotors. The three-phase digital generator provided by the invention has the advantages that: (1) the three-phase digital generator is particularly applied to a three-phase non-equilibrium and non-linear load; (2) the volume and the weight of the three-phase digital generator are substantially less than the volume and the weight of a traditional three-phase generator, which can save a lot of copper materials, improve the efficiency, and save fuels; (3) the output voltage is stable; (4) the output harmonic is low and environmentally friendly; (5) an output power factor is controllable and can meet requirements of different loads; (6) three-phase output is symmetrical for any loads; and (7) three-phase output of the three-phase digital generator can also be used in a parallel manner by multiple machines to increase the output power.

The invention discloses a variable-mass power centrifuge and an experimental method. Mass distribution of a centrifuge system is changed through electromagnetic force, so that the rotational inertia of the system is changed, the rotation angular velocity and the angular acceleration of the centrifuge are changed, and an excitation effect is achieved in both the radial and tangential directions. The power centrifuge comprises a fixed electromagnetic device, the generated electromagnetic force acts on a sliding mass block, so that the sliding mass block moves radially according to a certain rule, and the magnitude and the frequency of the electromagnetic force are adjustable; on the other hand, the sliding mass block is adjustable in size, and the size of the sliding mass block can be increased or decreased according to specific experimental requirements. A plurality of experiment cabins can be arranged on an experiment table, power centrifugal experiments with the same excitation frequency but different excitation amplitudes can be carried out for experimental parts in the same type at the same time, and comparative experiments under the same excitation environment can be carried out for different experimental parts. The adverse effect of hydraulic excitation is avoided, a novel method is provided for multidirectional excitation, multiple different types of excitation can be realized, operation is simple and convenient, and control is convenient.

The invention relates to a rail damper with a built-in bottom plate and a design method thereof, the damper comprises a bottom plate, a roof, a rubber layer, and an elastic clasp of a rail pressed together with the roof, the damper is characterized in that the bottom plate is placed in the roof and is in vulcanization connection with the roof through a rubber layer. The vulcanized joint surfaces of the bottom plate and roof are both inclined planes, and the bottom plate is provided with anchoring mounting holes for being fixedly connected with a sleeper. The bottom plate is arranged in the roof, and the installation position of the rail damper is designed in the inner part of the product to reduce the requirement for the installation size of the sleeper, which is suitable for the connection of a small sleeper and a rail damper, thus improving the transverse stiffness of the rail damper. The rigidity of the rail damper can be adjusted, the probability of permanent deformation of the rubber layer can be reduced, the reliability of use of the rail damper is improved, the vulcanization molding is simpler, the requirements of mold, technology and equipment are lower, and the transverserestraint performance of the rail damper is improved. The safe driving performance of small curve radius sections is improved.

The invention provides a rear-mounted three-level gearbox assembly with double shifting forks. The rear-mounted three-level gearbox assembly comprises a gearbox housing; an input shaft, an angle gear shaft and a middle shaft are disposed in the gearbox housing; the input shaft is sequentially provided with first driving teeth and second driving teeth; medium-low speed gear transition teeth, medium speed gear middle teeth and low speed gear middle teeth are disposed on the middle shaft; the input shaft is in key joint with a medium-high speed gear clutch which is provided with the medium-high speed gear shifting fork; the middle shaft is in key joint with a low speed gear clutch which is provided with the low speed gear shifting fork; a low speed gear shifting fork shaft is disposed on the low speed gear shifting fork; a medium-high speed gear shifting fork shaft is disposed on the medium-high speed gear shifting fork; first grooves are formed in the outer side of the low speed gear shifting fork shaft; second grooves are formed in the outer side of the medium-high speed gear shifting fork shaft; the first grooves and the second grooves are each provided with a shifting fork shaft control mechanism. The gear shifting structure is reasonable in design, three-level speed changing is achieved, and the requirements for running with heavy load and fast running with light load are met.

The invention discloses a three-phase four-line digital generator which is especially applicable to three-phase non-balance non-linear loads. The three-phase four-line digital generator comprises an engine, one or two three-phase permanent magnetic generators, two three-phase commutating and voltage-stabilizing modules, three direct-current alternating-current converters, three LC filters and one rectifier bridges. The three-phase four-line digital generator is characterized in that the three-phase permanent magnetic generator can be composed of one stator and one rotor or two stators and two rotors. Direct-current output ends of the two three-phase commutating and voltage-stabilizing modules are connected in series, and a center line is led out. The three-phase four-line digital generator has the advantages of being especially suitable for the three-phase non-balance non-linear loads; being small in size and weight, high in efficiency and low in oil consumption; being stable in output voltage; being low in output harmonic wave and environment-friendly; being controllable in output power factor and capable of meeting requirements of different loads; being symmetrical in three-phase output for any load; and being capable of being used in multi-generator parallel-connection mode and increasing output power.