11results about How to "Reduce internal friction" patented technology

The invention relates to the technical field of powder metallurgy, and discloses a forming agent and a preparation method thereof, and a hard alloy and a preparation method thereof. The forming agent is prepared from, by mass, 45%-55% of paraffin, 25%-35% of polyethylene glycol, 12%-18% of stearic acid and 5%-8% of the sum of fatty alcohol-polyoxyethylene ether and oleic acid, and the mass ratio of the fatty alcohol-polyoxyethylene ether to the oleic acid is (2-6): 1. The forming agent improves the forming process and improves the quality of the prepared hard alloy.

The invention belongs to the technical field of talcum powder. The invention provides high-dispersity talcum powder and a preparation method thereof.The preparation method comprises the following steps that S1, zirconium oxide beads are adopted as a grinding medium, the grinding medium and grinding materials are added into a charging barrel of a vertical sand mill, the grinding materials comprise talcum powder raw materials, carboxymethyl cellulose graft copolymers and sodium hexametaphosphate, the rotating speed is adjusted to be 9.5 m / s, the grinding time is 3-12 h, and a mixture is obtained; grinding to obtain ground powder; s2, adding an aqueous dispersion into the ground powder obtained in the S1, and adjusting the rotating speed to 9.5 m / s and the grinding time to 8-36 hours to obtain ground slurry; and S3, drying and crushing the ground slurry obtained in the S1 to obtain the high-dispersity talcum powder. The carboxymethyl cellulose grafted copolymer is added into the grinding material, so that the viscosity of grinding slurry is reduced, and meanwhile, the dispersity of talcum powder particles is improved.

The utility model belongs to the technical field of coffee powder making devices, and particularly relates to a high-caffeine freeze-drying instant coffee powder making device which comprises a grinding box and supporting legs fixed to the lower surface of the grinding box and further comprises a coarse grinding mechanism arranged on the surface of the grinding box. The coarse grinding mechanism comprises a feeding port and a discharging port which are formed in the surface of the grinding box, middle shafts are symmetrically and rotationally connected to the surface of the grinding box, grinding rollers are fixedly connected to the surfaces of the middle shafts, a material receiving hopper is arranged on the lower surface of each grinding roller, and a first inclined plate is arranged on the lower surface of each material receiving hopper; according to the utility model, the whole raw material can be crushed into fragments, and then coarse grinding is carried out, so that equipment abrasion or blockage caused by the fact that large particles directly enter a grinding cavity is avoided, the processing efficiency is improved, particle edges and corners can be effectively crushed, large particle residues are reduced, and coffee powder is finer and more uniform in particle size.

An actuation system includes a transmission shaft pivotable about a longitudinal axis thereof, a detent spring having an engaged state adapted to prevent pivoting of the transmission shaft and a released state adapted to allow pivoting of the transmission shaft, a detent actuation mechanism coupled to the detent spring and including a toggle actuator operable between a first position and a second position to cause the detent spring to transition between the engaged state and the released state, wherein the first position of the toggle actuator corresponds to the engaged state of the detent spring and the second position of the toggle actuator corresponds to the released state of the detent spring, and a stop mechanism coupled to the detent actuation mechanism, the stop mechanism being transitionable between a first biased state and a second biased state, wherein the stop mechanism applies a first biasing force when in the first biased state to assist the toggle actuator in maintaining the first position and the stop mechanism applies a second biasing force when in the second biased state to assist the toggle actuator in maintaining the second position.

This invention relates to the field of energy storage system control technology, and discloses an adaptive dynamic reconfiguration integrated control method and device for energy storage systems. This invention achieves pooled management of physical energy storage resources by constructing a virtual energy management platform at the software layer. It combines task performance constraints and multi-objective optimization to achieve dynamic configuration of virtual energy storage units. Through the conversion of logical topology to physical action commands, coupled with a safe topology reconfiguration strategy, it realizes autonomous and online reconfiguration of the electrical connections and operating modes of the energy storage system. Simultaneously, relying on closed-loop adaptive adjustment of comprehensive deviation values, it achieves real-time optimization of the system's operating status, effectively solving the problem of refined management of heterogeneous resources, meeting the grid's demand for rapid and seamless multi-task switching, significantly improving the flexibility, intelligence level, and operating economy of the energy storage system, and adapting to the complex operating requirements of high-proportion renewable energy power systems.

The utility model provides a variable-stiffness magnetorheological damper with bypass holes and capable of keeping low-speed stability. The magnetorheological damper is mainly composed of a piston rod, a piston head, a spring, a floating piston, a magnet exciting coil, a cylinder barrel and the like. Under the action of a magnetic field, an annular flow channel in the piston head generates a magnetorheological effect, so that the shear yield stress of magnetorheological fluid is increased, and damping force is generated. The floating piston is not only used for compensating volume change, but also provides resistance for the piston through the spring connected with the floating piston; the magnitude of the damping force can be changed by changing the magnitude of the current introduced into the magnet exciting coil; and different pressures are provided for the floating piston, so that the compression amount of the spring is changed, and the rigidity of the magnetorheological damper is changed. A bypass hole without a magnetic field effect is formed in the piston; when the speed of the piston is low, the magnetorheological fluid passes through the bypass hole under the pressure difference between the left hydraulic cavity and the right hydraulic cavity, so that the output damping force is reduced, sudden changes of the damping force and rigidity under the low-speed working condition are reduced, and the working stability is improved.

The present application relates to the technical field of chassis suspension system testing, and specifically discloses a vehicle unsprung mass measurement method, device, equipment and storage medium, the method comprising: controlling a target vehicle to move vertically up and down at a horizontal plane, the stiffness characteristic of the suspension system of the target vehicle being linear; obtaining spring elasticity and wheel normal pressure of at least two sampling points in the vertical up-and-down movement process of the target vehicle, the wheel normal pressure being the pressure given to the vehicle by the horizontal plane in the vertical direction; determining the mapping relationship between the spring elasticity and the wheel normal pressure based on the obtained spring elasticity and wheel normal pressure; calculating the target wheel normal pressure corresponding to zero spring elasticity according to the mapping relationship, and calculating the unsprung mass according to the target wheel normal pressure. The present application improves the accuracy of unsprung mass measurement.

The present application relates to polyvinyl chloride pipe manufacturing technology field, disclose a kind of modified PVC power cable protection pipe, including polyvinyl chloride resin, heat stabilizer, pentaerythritol, stearic acid, calcium carbonate, polyolefin alloy ionomer masterbatch and liquid complexing agent.Polyolefin alloy ionomer masterbatch is composed of octene-1 and ethylene copolymer, high-density polyethylene, maleic anhydride grafted polyolefin elastomer and active zinc oxide.Liquid complexing agent is composed of isopropyl tri (dioctyl pyrophosphoric acyloxy) titanate and epoxy soybean oil.Polyvinyl chloride dry mix and polyolefin alloy ionomer masterbatch are melt extruded when preparing, and liquid complexing agent is injected laterally.The present application forms toughening phase by polyolefin alloy ionomer masterbatch to absorb and disperse impact stress, and liquid complexing agent improves compatibility of formula raw materials.Lateral injection process promotes liquid complexing agent to directly act on mixed interface, and improves the compactness of modified PVC power cable protection pipe.

The utility model relates to bridge structure vibration control technical field, concretely relates to a kind of eddy current damper. Including: middle support component, damper cylinder and at least one movable rack;Wherein, middle support component, it is used to connect with main tower connecting piece;Damper cylinder is connected with middle support component, and damper cylinder middle part is supported on middle support component, and damper cylinder is equipped with at least one group of damping transmission assembly;At least one movable rack, it is movably arranged on damper cylinder, movable rack one end is engaged with damping transmission assembly, the other end is used to connect with main beam. The support position of damper in the embodiment of the application is optimized as main middle support, greatly reduce the secondary stress of structural member due to excessive deadweight, reduce the internal friction between gear, rack and other structural members due to deadweight, to enhance the reliability of eddy current damper axial tension and compression energy consumption, and the durability and service life of damper long-term use.

The invention belongs to the technical field of high polymer materials, and particularly relates to ABS-PS composite plastic with a high melt flow rate and a preparation method of the ABS-PS composite plastic. The preparation method comprises the following steps: S1, performing surface modification on montmorillonite powder by using chlorinated 1-hexadecyl-3-methylimidazole to obtain ionic liquid modified montmorillonite, and then mixing the ionic liquid modified montmorillonite, ABS resin and SAN resin for melting modification to obtain a modified ABS material; s2, mixing the modified ABS material, the PS material, a compatilizer, a titanate coupling agent and an antioxidant by using a high-speed mixer, and then feeding the mixture into a double-screw extruder for mixing and granulating to obtain the ABS-PS composite plastic with the high melt flow rate. The composite plastic disclosed by the invention has a relatively high melt flow rate and excellent flame retardant property, so that the composite plastic can be better applied to shells of household appliances such as air conditioners and the like.

This invention discloses a vibratory compaction device and operating method for road construction, relating to the field of road construction technology. It includes a drive vehicle with a lifting mechanism on its left side, a protective mechanism at the bottom of the lifting mechanism, and a rotating mechanism at the bottom of the lifting mechanism. A vibratory compaction mechanism is located at the bottom of the rotating mechanism to increase the compaction of the road surface. The vibratory compaction mechanism includes: a compaction component located at the bottom of the rotating mechanism; a kinetic energy component located at the top of the compaction component; and a vibration component located inside the compaction component. A compaction arc plate, which is fixedly installed near the bottom of the compaction box, is located on the outer ring of the compaction box. The compaction arc plate is arc-shaped, allowing it to better adapt to uneven parts of the road surface, such as potholes and bumps, during movement. The arc edge transitions more smoothly during compaction, reducing impact on the equipment and improving its service life.