44results about How to "The method is versatile" patented technology

The invention discloses a method for preparing a calcium silicate hydrate nano film, which is a method for preparing a calcium silicate hydrate (C-S-H) nano film by using a magnetron sputtering method. Calcium silicate hydrate powder is calcined, and then the calcined powder is pressed into a target with a steel mold, and then a film of a certain thickness is deposited on the surface of the substrate by magnetron sputtering technology, and finally the film sample is placed in calcium hydroxide saturated Soak in the aqueous solution to get the nano film of calcium silicate hydrate. The invention lays a foundation for the observation of the microscopic morphology of the calcium silicate hydrate on the microscopic scale, the research on the mechanical properties, the durability and the like.

The invention discloses a method for establishing a mesh model of a steam-water separator under a specific desteam fraction condition, comprising the following steps: establishing a three-dimensionalgeometric model of a steam-water separator assembly in a steam generator and establishing a fluid domain geometric model on the basis of the three-dimensional geometric model; The unstructured tetrahedral mesh model of steam-water separator with full desteam in the descending annulus is established. Marking the grid cells in the descending annulus channel of the steam-water separator according tothe required desteam fraction, and setting the marked grid cells as porous media; The mesh model of steam-water separator with arbitrary degassing fraction in the descending annulus is established byadding a drag term which is three orders of magnitude larger than that in the other two directions to the porous media. The invention can flexibly adjust the descending annular cavity desteam share, and avoids repetitive geometric modeling work.

The invention discloses a calculation method for coupling condensation and evaporation on both sides of the containment of a pressurized water reactor, which comprises the following steps: establishing a simplified geometric model of the calculation domain of the containment of the pressurized water reactor; Grid division to obtain the grid model of each part; by setting the interface of each part in the containment calculation domain of the pressurized water reactor as the grid interface to realize the splicing of the grids of each part; within the range of the fluid domain grid model in the containment The steam condensation calculation is carried out inside; the temperature distribution in the solid domain of the containment body structure is calculated by the heat conduction relation; the flow field and temperature field of the liquid film in the fluid domain outside the containment are calculated by using the liquid film model.

The invention provides a crawling control method for a hybrid electric vehicle. An engine of the hybrid electric vehicle provides power for a front axle through a transmission, a drive motor provides power for a rear axle, and a high-voltage power battery provides electric energy for the drive motor. The method includes the steps that whether the hybrid electric vehicle meets the following conditions that a gear shifting lever is in a reverse gear or a forward gear, the value of the vehicle speed is lower than a preset vehicle speed value, and an accelerator pedal is loosened or not is detected; when the hybrid electric vehicle meets all the conditions, whether the transmission is in a neutral position or not is detected; if the detection result shows that the transmission is in the neutral position, the drive motor is controlled to drive the hybrid electric vehicle, and the hybrid electric vehicle is in a crawling mode; if the detection result shows that the transmission is not in the neutral position, after the transmission is in the neutral position, the drive motor is controlled to drive the hybrid electric vehicle, and the hybrid electric vehicle is in the crawling mode. The invention further provides a crawling control device. The crawling control method is simple, easy to implement and high in universality.

The invention discloses a cooling and evaporation coupling calculation method on both sides of a liquid metal helical tube steam generator, which comprises the following steps: establishing a geometric model of the helical tube steam generator computational domain prototype; Partial meshing is carried out to obtain the mesh model of each part, and the boundary conditions are set; the splicing of the meshes of each part is realized by setting the interface of each part in the calculation domain of the spiral tube steam generator as the mesh interface; the liquid state The physical properties of the metal are imported according to the turbulent Pr number correction relationship; reasonable initialization and boundary condition correction are performed; steam evaporation is performed in all areas of the helical tube steam generator including: solid area and the grid model of the shell side and tube side fluid domain , lead-bismuth condensation, coupled flow and heat transfer calculations in the solid region of the tube wall.

The invention provides a multi-shaft-hole automatic aligning method based on a laser tracker, and belongs to the technical field of large part assembly control. The multi-shaft-hole automatic aligningmethod comprises the steps that firstly, a multi-shaft-hole automatic aligning system constituted by the laser tracker, a mechanical arm and a computer is set up, and a shaft part is mounted on the end face of the mechanical arm; a shaft part coordinate system and a perforated part coordinate system are built, and a rotation matrix and a translation vector between the two coordinate systems are obtained; four non-collinear reflecting target spheres are mounted on the shaft part, and the target positions corresponding to all the target spheres are calculated; and an initial jacobian matrix ofthe mechanical arm is obtained; movement of the mechanical arm is controlled in an iterating mode from the initial position, thus the shaft part gets close to the perforated part gradually, and when the four reflecting target spheres reach the target portions, the shaft part and the perforated part are aligned. Movement of the mechanical arm is controlled in a closed-loop mode through measuring data of the laser tracker, multi-shaft-hole high-precision automatic aligning can be achieved, and the assembly efficiency and robustness are improved.