125 results about "Viscous effect" patented technology

The present invention discloses a structural and mechanical model and modeling methods for human bone based on bone's hierarchical structure and on its hierarchical mechanical behavior. The model allows for the assessment of bone deformations, computation of strains and stresses due to the specific forces acting on bone during function, and contemplates forces that do or do not cause viscous effects and forces that cause either elastic or plastic bone deformation.

The invention discloses a hemostatic non-viscous material and a preparation method thereof. The material comprises a non-viscous layer of a compact structure, and a hemostatic layer of a loose structure. The non-viscous layer is composed of at least two non-viscous sublayers wrapped up layer by layer. The apertures of small holes in each non-viscous sublayer are of a gradient structure and gradually decrease from outside to inside. The hemostatic layer is also provided with spongy small holes. According to the method, the air-drying, the freeze-drying, the activation and the complexation are conducted respectively. In this way, the non-viscous layer of the compact structure and the hemostatic layer of the loose structure are prepared. Meanwhile, the hemostatic and non-viscous effect of the material is remarkably improved. The material and the method are convenient in clinical application.

A perforated soundproof structure is formed by oppositely arranging an external plate 1 and an internal plate 2 having a number of through-holes 2a. The board thickness, hole diameter and open area ratio of the internal plate 2 are set to satisfy design conditions to give rise to a viscous effect in the air passing through the through-holes 2a, and the design conditions are set so that the frequency bandwidth to attain an absorption coefficient of 0.3 or more is 10% or more of the resonance frequency.

The invention discloses a double-layer hydrogel bionic hand and a preparation method thereof. The double-layer hydrogel bionic hand is formed by bonding a layer of polyacrylic acid hydrogel with pH responsiveness and viscidity and a layer of Fe<3+> cross-linked polyacrylic acid hydrogel through the viscous effect; the double-layer hydrogel bionic hand can be similar to a human hand to achieve bionic actions of hand closing and opening through a method of changing the pH values and ionic strengths of solutions in the solutions with the different pH values, and the effects of grabbing and releasing objects are achieved.

The invention discloses an iterative propulsion disturbance domain updating method for aircraft dynamic aerodynamic characteristic simulation. Aiming at the problem that a large amount of invalid calculation exists in an existing aircraft dynamic aerodynamic characteristic numerical simulation method, three kinds of dynamic calculation domains of unsteady, convection and viscosity are adopted, anda solving thought that only non-convergent unsteady units are solved and the viscosity effect is only considered in a local area is provided, wherein the unsteady dynamic calculation domain only comprises grid units which play a leading role in the unsteady effect at each physical moment; the convection dynamic calculation domain only comprises grid units which are disturbed in each iteration step and are not converged yet, the viscosity dynamic calculation domain only comprises grid units which play a leading role in the viscosity effect in the convection dynamic calculation domain, and thethree types of dynamic calculation domains can be updated in a self-adaptive mode in each iteration step. By avoiding invalid calculation in unsteady numerical simulation and reducing the number of iteration steps required for inner iteration to reach a convergence state, the calculation efficiency of aircraft dynamic aerodynamic characteristic numerical simulation can be remarkably improved.

The present invention discloses a structural and mechanical model and modeling methods for human bone based on bone's hierarchical structure and on its hierarchical mechanical behavior. The model allows for the assessment of bone deformations, computation of strains and stresses due to the specific forces acting on bone during function, and contemplates forces that do or do not cause viscous effects and forces that cause either elastic or plastic bone deformation.

The invention discloses a production process for converting gray black barite into a white barite finished product. The process flow comprises: crushing black barite raw ore, roasting, grinding into powder, washing with water, pickling overflow liquid obtained after washing with water, rinsing, filtering, drying, finely breaking, packing and obtaining finished product, wherein the bottomflow liquid obtained after washing with water is filtered, the product obtained is dried and finely ground, and the ground product is packed and thus, the drilling fluid finished product is obtained. When the production process is used, gray black barite can be converted into white barite which can be directly used in paint making, coating, paper making and the like industries as a filler, the density of barite can be increased greatly, the corresponding indexes such as alkali metal content and viscous effect can be improved correspondingly, the prepared drilling fluid weighting agent can meet high-density and high-quality drilling fluid requirements, the application range of the gray black barite can be obviously expanded and the utilization value of the gray black barite can be increased.

The lift and drag performance of all vehicles is strongly influenced by viscous effects, and in turn, laminar separation bubbles. This application employs an effective fluid boundary layer control strategy that reduces parasitic drag, allows for more usable angles of attack, and delays or stops separation. In the approach of this application, the control surface effectively uses the Magnus effect to delay or stop a separation bubble from forming, which can increase lift, reduce drag, and delay degrees of stall by directly manipulating the velocity gradient in the fluid boundary layer.

The invention discloses a gradational-section low-frequency sound absorber design method. By constructing a gradational section structure folded in space, the sound absorber can thus absorb low-frequency sound waves effectively by utilizing structural resonance and air thermal viscous effects. Compared with the traditional uniform channel sound absorber, the sound absorber constructed by the method can achieve a lower sound absorption frequency in the same volume, and can change the sound absorption frequency without changing the shape. By installing a plurality of sound absorbers with different peak absorption frequencies in parallel, low-frequency broadband sound absorption at a sub-wavelength scale can be realized. In summary, the sound absorber constructed by the method of the invention has the characteristics of simple structure, low processing difficulty and easy installation and use.

The invention provides a method for testing concrete viscous effect evolution under an erosion condition. The method comprises concrete relaxation time evolution test and concrete damage evolution determination under an erosion condition. The method can be operated simply, provides a concrete relaxation time test method under an erosion condition, provides a concrete damage evolution determination method, can accurately test a concrete material viscous effect evolution rule under the erosion condition and does not damage a test piece to be detected.

The invention discloses a concrete spreader. The concrete spreader comprises a support (1) and a hopper (2) connected with the support (1). A discharging outlet (4) is formed in the lower end of the hopper (2). A discharging accelerating device (3) is arranged in the discharging outlet (4). Compared with the prior art, since the discharging accelerating device is arranged in the discharging outlet, under the effect of the discharging accelerating device, concrete falling via the discharging outlet has a certain initial velocity, the falling velocity is higher, and the concrete is compact whenfalling into a tube pile steel mould; the discharging accelerating device enables the volume of the concrete passing through the discharging outlet within a unit time period to be greater than the volume of the concrete falling under gravity within the unit time period, and the purpose of increasing the output capacity can be achieved without needing to increasing the opening degree of the discharging outlet; and in addition, the discharging accelerating device does not make complete contact with the concrete, a viscous effect of the concrete on the discharging accelerating device is small, accordingly, power needed for the discharging accelerating device is low, and abrasion is small.

The invention provides a ceiling type air conditioner indoor unit. The ceiling type air conditioner indoor unit comprises a shell, a heat exchanger and a laminar flow fan, wherein the shell is provided with air inlets and air outlets; the heat exchanger is arranged in the shell; the laminar flow fan is arranged in the shell, and comprises a plurality of annular disks which are arranged in parallelat intervals and are fixedly connected with each other; when the plurality of annular disks are driven to rotate, air is sucked into a cavity on a radial inner side from one axial end, and then air boundary layers on the surfaces of the annular disks are driven by the annular disks to rotationally move from inside to outside along a radial direction due to the viscous effect to form laminar flowwind, in order that air is driven to flow through the heat exchanger from the air inlets, and then flow to the air outlets in order to return to a room; two guide plates which are arranged oppositelyand rotationally are arranged on each air outlet; each guide plate is provided with a plurality of ventilation micro-holes along a thickness direction; and two guide plates can rotate in a deviating way to positions where the air outlets are opened, so that a channel formed between the two guide plates is used for guiding the air outlet direction, or rotate toward to each other to positions wherethe air outlets are closed, so that air outlet current is blown through the plurality of ventilation micro-holes.

The invention relates to a pure radial supersonic speed micro turbine structure with an air bearing. The structure is characterized in that air flow enters a turbine stator runner (5) from the radial direction, and then the flowing direction of the air flow in a turbine is always kept in the radial direction; according to a stator part, stator blades (2), an upper casing (1) and a lower casing (4) form a contraction and release flow channel, and the cross section area of a throat part of the flow channel is equal to the critical area of designed flow, so that airflow is accelerated to supersonic speed; an inlet blade of a rotor impeller (3) is in a blunt end shape to block part of the flow area so as to adapt to the small flow design requirement of the micro turbine; and dynamic pressure grooves (7) are engraved in the back face and the edge of the rotor impeller (3) and matched with the lower casing (4) to form a dynamic pressure air bearing runner (6), and when the rotating speed of the turbine reaches a design value, air in the dynamic pressure grooves provides supporting force due to the viscous effect, and the thrust and radial bearing effects are achieved. The structure can realize expansion acting of small-flow high-pressure gas and has the characteristics of being compact in structure, extremely high in rotating speed, small in required flow, capable of acting by using cold air, high in expansion ratio and strong in acting capacity.

The invention relates to the technical field of lithium ion batteries, and in particular relates to a polar plate positioning mechanism, a lithium ion battery lamination device and a lithium ion battery lamination method. The polar plate positioning mechanism is used for location of a polar plate, the polar plate positioning mechanism comprises a positioning placing plate, the upper surface of the positioning placing plate is used for placing the polar plate, the upper surface of the positioning placing plate is provided with a liquid guiding channel, and the liquid guiding channel is used for discharge of an electrolyte on the polar plate. The lithium ion battery lamination device and the lithium ion battery lamination method both adopt the polar plate positioning mechanism, the polar plate positioning mechanism and the lithium ion battery lamination device can improve the viscous effect of the polar plate in the process of positioning due to excess electrolyte, and have the advantages of good localization effect, the lithium ion battery lamination method can effectively pre discharge the excess electrolyte on the polar plate for preliminary positioning, and the lamination method is simple, and has good lamination effect.

The invention provides an indoor unit of a wall-mounted air conditioner. The indoor unit of the wall-mounted air conditioner comprises a shell, an evaporator and two laminar flow fans, wherein a cavity is defined in the shell, the shell comprises a front panel and a rear shell, the rear shell is provided with an air inlet, and the front panel is defined with two air outlets; the evaporator is arranged at the position, corresponding to the air inlet, inside the cavity and is configured to exchange heat with air entering the cavity through the air inlet, the evaporator is provided with a peripheral wall and a bottom wall, the bottom wall is parallel to the front panel, and the peripheral wall is positioned on one side close to the front panel; and the two laminar flow fans are arranged on the front side of the evaporator and are configured to enable air subjected to heat exchange of the evaporator to form laminar flow air by utilizing a viscosity effect and enable the laminar flow air tobe blown out from the air outlets. According to the indoor unit of the wall-mounted air conditioner, laminar air supply is realized through the viscosity effect, the noise is low, and the air quantity is high; the two laminar flow fans can respectively and independently control air supply; and the cover buckle type evaporator greatly increases the heat exchange area and effectively improves the overall working efficiency of the indoor unit of the wall-mounted air conditioner.