6results about How to "Improve unit efficiency" patented technology

This utility model discloses a flat-jaw vise with accurate positioning and high positioning precision. The lower end of the fixed jaw is fixedly installed on one end of the base, and the support of the pushing mechanism is slidably and fixedly installed on the base. The lower end of the movable jaw clamping block is slidably installed on the base, with a movable jaw fixed at one end and a mounting hole at the upper end and a threaded hole I at the lower end of the other end. A steel ball mounting groove is formed on the U-shaped groove wall near the movable jaw. The upper surface of the L-shaped angle block is provided with an inclined surface, which is placed in the U-shaped groove of the clamping block. Its lower end is slidably installed on the base, and its inclined surface presses against the steel ball. A set screw threaded into the threaded hole I of the clamping block is pressed against the end face of the L-shaped angle block away from the movable jaw. The lead screw passes through the mounting hole of the clamping block and abuts against the end face of the L-shaped angle block away from the movable jaw. This utility model has a good inclined pressing effect, accurate positioning, good stability, and high positioning precision, which can meet the needs of high-precision machining of workpieces.

The invention provides a hot rolling oxide scale control method for a cover-withdrawing deep-drawing structural steel strip and the cover-withdrawing deep-drawing structural steel strip. By controlling a cooling mode in a hot rolling process and combining rough rolling, finish rolling and coiling processes, the thickness of an oxidation layer of the obtained steel strip is smaller than or equal to 11 microns, the oxidation layer structure is a proeutectoid Fe3O4 + eutectoid structure (Fe + Fe3O4) + FeO, the oxidation layer is free of a Fe2O3 phase, the proportion of the proeutectoid Fe3O4 is 70-80%, the proportion of the eutectoid structure is 10-20%, the proportion of FeO is about 10%, and obvious precracks exist in the oxidation layer structure. On the basis, during acid rolling, the acid pickling speed can be increased to 160-180 m / min, the defects that in an original technology, an oxide layer is not prone to being completely washed, and the defects of over-acid pickling and under-acid pickling are likely to be formed are overcome, the problem that the environment is polluted by acid pickling rime fog does not exist, and the steel belt obtained after acid pickling is excellent in surface quality and good in technical and economic index.

The present application belongs to the technical field of stator manufacturing, and particularly relates to a stator design method for integrated general fluid machinery and a general fluid module. The stator design method for integrated general fluid machinery comprises the following steps: 1) determination of an electric drive diameter; 2) determination of an effective electric drive length; and 3) determination of a pole pitch. Through the above operation process, the operation efficiency and stability of the general fluid module applying the stator can be effectively ensured or even improved. Another object of the present application is to provide a general fluid module applying the stator design method, so that through integrated design, the intermediate connecting frame and the number of vulnerable components and friction loss are reduced, thereby further improving the overall efficiency of the unit.

The application discloses a design method and a sealing structure of a straight-through labyrinth sealing structure based on an agent model optimization and a non-uniform distribution of sealing teeth, and relates to a design method and a sealing structure of a straight-through labyrinth sealing structure. In order to solve the problems that the existing labyrinth sealing optimization depends on complex structure changes or additional components, is high in cost and is not suitable for old unit reconstruction, and a non-uniform distribution lacks a systematic design method and mechanism guidance, the design method comprises the following steps: determining design variables and constraint conditions, wherein the design variables comprise an axial total length L, a tooth number n and an axial coordinate of a middle tooth; generating sample points by using a Latin hypercube sampling; obtaining a leakage amount by CFD simulation; constructing a Kriging agent model; and optimizing by using a genetic algorithm and iteratively verifying until the accuracy is met. The application belongs to the technical field of rotary machinery sealing.

The invention provides a hot-rolled oxide scale control method for a steel strip for a cover withdrawing flux-cored wire and the steel strip for the cover withdrawing flux-cored wire. According to the control method, through a specific cooling mode in a hot rolling process, soaking, rough rolling, finish rolling and coiling processes are combined, the thickness of an oxidation layer of the obtained steel strip is smaller than or equal to 10 microns, the oxidation layer structure is proeutectoid Fe3O4 + eutectoid tissue (Fe + Fe3O4) + FeO, the oxidation layer does not contain Fe2O3 phase components, the proportion of proeutectoid Fe3O4 is about 20%, the proportion of eutectoid tissue is about 70%, the proportion of FeO is about 10%, and obvious precracks exist in the oxidation layer structure. In acid rolling, the acid pickling process speed can be increased to 170-190 m / min, the defects that in an original process technology, an oxide layer is not prone to being completely washed, and over-acid pickling is prone to being formed are overcome, the problem that the environment is polluted by acid pickling rime fog does not exist, and the steel belt obtained after acid pickling is excellent in surface quality and good in technical and economic index.

The invention discloses a galloping early warning method for a wind turbine generator group in the same offshore wind field, and the method comprises the following steps: 1, obtaining the operation data of a certain group of offshore wind turbine generators, carrying out the data preprocessing, correlation analysis and feature screening, and obtaining a data set; 2, constructing an XGBoost model, and carrying out training until the model prediction effect is optimal, so as to obtain an optimal XGBoost model; and step 3, through the optimal XGBoost model, predicting the average generator speed of the group of offshore wind turbine generators, and monitoring the difference value between a predicted value and a true value to complete galloping early warning of the group of offshore wind turbine generators. And 4, performing data filling through a GAIN network, and migrating the data to other offshore wind turbine generators of the same wind farm by utilizing migration learning to realize galloping early warning of all the offshore wind turbine generators of the whole wind farm. The galloping early warning and monitoring accuracy can be improved, and the galloping monitoring hidden danger and early warning cost of the offshore wind turbine generator can be reduced.