38 results about "Force chain" patented technology

A drive mechanism for an injection molding machine has an output element that is moveable in a straight line and an electric motor drive unit having an electric motor and a piston-cylinder unit which has a first piston-cylinder unit in the force chain between the output element of the electric-motor drive unit and the movable component. A rapid actuating movement is possible and, the action of a high force is also achievable wherein a second piston-cylinder unit and a third piston-cylinder unit. A fluidic connection between the first cylinder chamber and the second cylinder chamber is controllable via a valve. When the valve is open, the second hydraulic piston displaces pressurized liquid from the second cylinder chamber into the first cylinder chamber, to actuate the movable component and, when the valve is closed, the third hydraulic piston displaces pressurized liquid from the third cylinder chamber into the first cylinder chamber to exert a high force on the movable component.

The invention relates to a device and a method for measuring force chains of particle deposits, wherein the device for measuring the force chains of the particle deposits comprises a pressure-sensing container, a fluorescence spectrum detector, an air compressor, a semispherical pressure head and a feeding device of the semispherical pressure head; the semispherical pressure head extends into thetransparent pressure-sensing container; the feeding device is connected with the air compressor; the fluorescence spectrum detector is arranged on one side face of the pressure-sensing container; onewall face of the pressure-sensing container corresponds to the fluorescence spectrum detector; a cover of the pressure-sensing container is provided with an excitation light source; and a power source connector is further arranged on the cover. With the adoption of the device and the method provided by the invention, the occurrence of the deposit of particulate matters can be effectively prevented, the transfer manner of the force chains of the particle deposits is clearly understood, and the guidance for how to effectively remove the debris deposited beds from boreholes can be provided.

The invention provides a dynamic force chain observation device of a flexible polishing wear particle group. The dynamic force chain observation device comprises an image processing device and a particle control device. The image processing device comprises a light source generator, a light source collector and a data analyzer. The light source generator is located at the bottommost end of an observation region. The light source transmitted by the light source generator penetrates through a lower polarized light device and points to a particle control device in the observation region composed of the lower polarized light device and an upper polarized light device. The upper surface of the particle control device is covered with a transparent baffle. The light source collector is located over the upper polarized light device. The light source collection view of the light source collector covers the light source transmitted out by the upper polarized light device. The data input end of the data analyzer is connected with the data output end of the light source collector. The data signal output end of the data analyzer is connected with a display screen of the data analyzer. The dynamic force chain observation device has the advantages that the external applying parameters of photoelastic particles can be detected in real time, the motion state of the photoelastic particles can be adjusted through sliding blocks, and simulation of the flexible polishing machining test is achieved.

The invention discloses a mold adjusting apparatus of a drawbar type injection molding machine. The apparatus is arranged on an end face of an injection molding machine mold adjusting template. The apparatus comprises a motor, and mold adjusting nuts. The mold adjusting nuts rotate under the driving of the motor. The motor is connected to a first gear. A gear ring is arranged at the center of the end face of the mold adjusting template. The first gear is engaged with the gear ring. Four second gears are uniformly distributed on the outer side of the gear ring. Each second gear is connected to the mold adjusting template through a core shaft arranged at the center of the second gear. The second gears are respectively engaged with the gear ring. A third gear is linked on the outer diameter of each mold adjusting nut. The third gears are engaged with the second gears. Each second gear is positioned between a corresponding third gear and the gear ring. With the mold adjusting apparatus provided by the invention, a driving force chain-transmission characteristic of prior arts is eliminated, and the driving force is transmitted by gear engagement, such that the purpose of mold adjusting is achieved. The transmission precision is high, the transmission process is smooth, the structure is simple, and the installation is convenient. Therefore, the mold adjusting process can be carried out more convenient, and the mold adjusting controlling is more precise.

The invention discloses a method for realizing visualization of a rock crushing process based on an EDEM. The method comprises the steps of constructing a rock physical model; obtaining rock particleposition information and establishing a force chain network model; defining a mechanical relationship of bonding bonds among particles in the model and acquiring intrinsic mechanical parameters of therock; calculating bond bearing information in the force chain network model under the action of an external load, judging the bond by utilizing a fracture criterion of the bond, judging whether crackaggregation intersection is formed or not, and when two sections of the crack are expanded to the surface of the rock, enabling the rock to form macroscopic fracture. According to the invention, thefracture position information and model reconstruction information of the bonding bond in the whole process are calculated to realize visualization of the rock crushing process; the stress change of the bonding bonds in the crushing process is analyzed from the microcosmic perspective, the fracture sequence of the bonding bonds in the crushing process is analyzed from the microcosmic perspective,the rock crushing characteristics are analyzed from the macroscopic perspective, visualization of the rock crushing process is achieved, and the rock crushing mechanism is conveniently analyzed and researched.

The invention, which relates to the technical field of photoelasticity and particle mechanics, discloses a particle material contact stress visualization test loading device comprising a photo-elasticexperiment device and a loading device that work independently. The loading device includes a rectangular frame; a horizontal baffle is connected to the middle part of the upper end of the rectangular frame by a vertical axial spiral head and a vertical baffle is connected to the middle of the front side of the rectangular frame by a horizontal shearing spiral head. In addition, the invention also discloses a using method of the device. A particle sample is loaded by the loading device; the dynamic stress change of the particle sample is dynamically captured by using the photo-elastic experiment device; and then the stress change image is analyzed by a computer. According to the invention, the contact stress state of the particle material can be studied deeply by three kinds of loading modes of the loading device; the visual image displaying of the stress distribution (force chain) of the particle material can be provided by using the photo-elastic experiment device; and the image isanalyzed by using computer software to obtain the stress distribution of all positions.

An improved drive mechanism for a windmill has: (a) a drive chain driven into movement by a wind wheel shaft driven into rotation by wind movement against a wind wheel; (b) a drive chain sprocket driven by the drive chain and coupled to a force chain sprocket to correspondingly drive a force chain; (c) a chain pin coupled at one position to the force chain and also coupled to a captive slide; and (d) a pump rod connected to the slide and driven an equal distance in each direction by the driven slide in order to convert full mechanical force equally on both the full upstroke and the full downstroke of the pump rod. The improved drive mechanism improves the efficiency of the power cycle by transitioning to the full upstroke with only a minimal dwell on either end of the stroke for transition to movement in the opposite direction. Full mechanical force can thus be applied equally on both the full upstroke and the full downstroke. A high reliability oil bucket chain link lubrication system is used to flood the entire chain mechanism with abundant oil to avoid the problems in traditional pumps of loss of priming, seal wear, etc.

The invention relates to the field of precision measurement, in particular to a photic double refraction principle based instrument used for observing and recording bearing structure configuration and features of a force chain in a granular system in real time. Functions of a photoelastic device, a multi-way loading system, a data collection display system, an industrial camera and a granular placement instrument are integrated, compressing and shearing of granular materials can be observed, and the features of the contact force chain can be visually observed. The photoelastic instrument is simple in operation, multiple in loading mode, and the comprehensive function of visualizing and integrating displacement, force and photoelastic images is achieved.

The invention relates to a particulate matter fluid-solid coupling photoelastic experiment device and a using method thereof, and belongs to the technical field of photoelastic experiments. The deviceis mainly composed of a bearing frame, a sealed container, a loading system, a water pressure supply system and a light source system. The device is applied to research on force chain structure evolution and action of the discrete particles in a specific water pressure environment, and the force chain evolution condition in a discrete particle system under the fluid-solid coupling condition can be observed very conveniently. In combination with extraction and analysis of digital images in the later period, spatial physical parameters such as displacement and rotation and mechanical parameterssuch as inter-particle contact normal and tangential force are calculated from the particle scale, and force chain strength distribution and configuration composition are obtained on the mesoscopic scale. within combination with a stress-strain relationship directly obtained by an experiment, multi-scale mechanical behavior research on the loose geologic body can be carried out deeply, a disaster-causing mechanism of the water environment on the loose geologic body is revealed, and an experiment basis is provided for constructing an engineering geologic safety control theoretical system in China.

The invention discloses a method of applying limestone to a lower-layer structure of a double-layer drainage pavement and belongs to the technical field of road engineering. The method comprises the following steps: the aggregate grading, the porosity and the thickness of the lower-layer structure of the double-layer drainage pavement are designed; multiple groups of discrete element digital models of the double-layer drainage pavement structure are constructed, and a load is applied to obtain force chain distribution of the load in the lower-layer structure of the double-layer drainage pavement; the average particle size of aggregates, bearing the main load along a force chain path, in the mixture is determined and corresponds to the closest standard sieve mesh interval; the aggregates between the sieve mesh intervals are made of basalt or dolerite, and the aggregates in a size of other sieve meshes are limestone; and the performance of an asphalt mixture of two stone materials is verified. According to the method in the invention, the aggregates which bear the main load are made of basalt or dolerite, and the other aggregates are limestone, the stress characteristics of the two kinds of aggregates are fully utilized, and the cost of the lower-layer structure of the double-layer drainage pavement is effectively reduced while the performance of the asphalt mixture is ensured.

The invention provides a granular material buffer performance measuring system. A granular substance is a rapid energy dissipating system, and energy is consumed mainly through intergranular non-elastic collision and sliding friction, and an intergranular force chain structure can increase the action area and the action time of external load, so impact load is certainly buffered, and destroys brought by the impact are reduced. The measuring system is composed of a fixed support, a granule impact system, a mechanical response measuring system and an image acquisition system, so vertical impact to the granular substance is realized, the acceleration of an impact substance and the impact force born by a baseboard can be accurately measured, the change of the surface form of the granule and the movement of the impact substance in the impact process is recorded, and a reliable device is provided for accurately measuring the buffer performance of the granular substance. The device can realize control and adjustment of the thickness of a granule layer and the impact height, and the influences of the thickness of the granule layer and the impact height on the buffer characteristic of the granule layer are researched.

The invention relates to an abrasive particle constraining device for particle force chain observation, which comprises an upper transparent layer, a lower transparent layer and a controller module, and is characterized by further comprising a DTU module and a cloud server, wherein the controller module is connected with the DTU module, and the DTU module is wirelessly connected with the cloud server. The cloud server is internally provided with a virtual reality diagnosis and maintenance module, wherein the virtual reality diagnosis and maintenance module includes a fault database stored withfault information and an expert experience database stored with solutions corresponding to the fault information. Due to adoption of the technical scheme, the technicians need not to go to the site of the abrasive particle constraining device for particle force chain observation personally for troubleshooting in the case that there is no available network interface or Internet around for the abrasive particle constraining device for particle force chain observation, thereby realizing a function of remote maintenance for the abrasive particle constraining device for particle force chain observation.

The invention discloses a method for reducing the initial pressure of the bottom of a large material bin. The material bin, a material bin fixing device, a connecting device, a feeding device, a reinforcing bracket and lifting devices are included. A gap between the material bin and the feeding device is connected through the connecting device, the connecting device plays a role in material blocking and sealing, and material leakage and dust overflow are prevented. The material bin is fixed to the ground through the material bin fixing device, the feeding device is located below the material bin and used for conveying materials, and the lifting devices are installed below the reinforcing bracket and used for supporting the feeding device. By means of the lifting devices, the feeding device can rise or fall by a certain height. When the materials are contained in the material bin and the feeding device is ready to start to convey the materials, the lifting devices fall from the high position point by 20-120 mm. At the moment, the structure of a material force chain in the material bin is changed, the bin pressure is reduced, and the torque provided by a motor required for restarting the feeding device is reduced. When the materials in the material bin are completely discharged, the lifting devices rise and reset to the high position point.