31results about How to "In line with the actual working status" patented technology

The invention discloses a method for overlaying a wear-resistant layer of a blade shroud of a turbine working blade. In the method, manual tungsten electrode argon arc welding is used, and the specific process parameters meet the requirements that: welding wires are selected from a T800 cobalt-based wear-resistant alloy welding wire which is researched according to a B50TF193 standard of AmericanGeneral Electric Company and an S-6 cobalt-based wear-resistant alloy welding wire which is researched according to an American metal society standard AMS5788; the diameters are phi 1.6mm and phi 1.2mm respectively; a mark and the diameter of a tungsten electrode are WCe20 and phi 2.0mm; the diameter of a nozzle is phi 12mm; welding current is between 20 and 25A; and the flow rate of protective gas is between 10L/min and 12L/min. By the method, the condition of incomplete penetration or over-melting of a Z-shaped gear switching part R is avoided, the problem of overheating of welding is also solved, and the occurrence probability of welding cracks is greatly reduced or avoided. The method completely meets the requirements of the wear-resistant layer in a high-temperature working state after welding.

The invention relates to a non-driving front suspension assembly comprehensive fatigue durability testing device and method. The testing device comprises an experiment table frame, an actuator assembly and a numerical control system; the experiment table frame comprises a front auxiliary frame fixing component, a steering gear fixing component, a portal frame, a rear auxiliary frame fixing component and a shock absorber fixing component; the experiment table frame is used for simulating the fixing effect of a suspension assembly on a vehicle body so as to fix the suspension assembly; the actuator assembly is controlled by the numerical control system to load a left tire and a right tire up and down separately; and the numerical control system is used for detecting the fatigue durability test data of various working conditions of the suspension assembly in different steering states. The influence of different steering angles on the fatigue durability test conclusion of the non-driving front suspension assembly is comprehensively considered, so that real and reliable experimental benchmarking data are provided for design of the non-driving front suspension assembly and fatigue life analysis and the like, thereby shortening the development period of each part of the non-driving front suspension assembly and lowering the cost and the like.

The invention provides a power distribution method and device of an electric vehicle power battery and an electric vehicle. The electric vehicle power battery comprises at least two series-connected battery groups in parallel. The power distribution method comprises a step of judging the number of the series-connected battery groups in a working state at present, a step of determining the maximum total discharging current of the electric vehicle power battery according to the maximum discharging current of a series-connected battery group in a working state at present if the number of the series-connected battery groups in a working state at present is one, a step of determining the maximum total discharging current of the electric vehicle power battery according to a condition whether the discharging between the series-connected battery groups in a working state at present is balanced and the maximum discharging current of the series-connected battery group whose actual discharging current exceeds a limit most easily in all series-connected battery groups in a working state at present if the number of the series-connected battery groups in a working state at present is larger than two, and a step of determining the total output power of the electric vehicle power battery according to the maximum total discharging current. The power distribution is reasonable.

The invention belongs to the technical field of wear test devices, and in particular relates to a tank type erosion wear test device and method. The tank type erosion wear test device comprises a bracket and a test sample clip, wherein the bracket is provided with a rotatable hollow roller; the hollow roller is provided with a sealing cover; a through hole is formed in the hollow roller or the sealing cover; the test sample clip is arranged in the hollow roller and is connected with the bracket; when the hollow roller rotates, the test sample clip is static and immobile; a blade is arranged on an inner wall of the hollow roller. According to the tank type erosion abrasion testing device and method, types of slurry milling materials, pH (Potential of Hydrogen) values of slurry, an erosion linear speed of a test sample and an erosion angle all can be adjusted, and the tank type erosion wear test device is applicable to researches on performance of wear-resisting materials; the position of the test sample in the hollow roller can be adjusted through a displacement device, and demands on the size of the test sample are not strict; tests for erosion wear performance of the test sample at different positions are realized; the adjustment of the erosion angle in a range of 0 to 90 degrees can be realized by adjusting the test sample clip.

The invention provides a rack experimental device with adjustable rigidity and a rigidity adjusting method thereof in order to solve the problem that the conventional rack experimental device has a bad fatigue test effect on the whole automobile or other parts of the automobile. According to arrangement of bolts and fastening nuts corresponding to bottom support through grooves and base through grooves and the setting of height of a supporting cylinder, the rigidity of the rack experimental device can be conveniently adjusted, particularly the rigidity can be adjusted in different directions, so that a fatigue test state accords with an actual operating state of the automobile body and the other parts of the automobile, the precision and effect of the fatigue test of the automobile body and the other parts of the automobile are greatly improved, and an accurate experimental validation guidance is provided for the design of the automobile and the parts.

The invention provides a method for establishing an excavating, material-taking and cutting resistance time history simulation model of a bucket wheel machine. The method comprises the following steps of establishing a material pile model; establishing a bucket finite unit model; and combining the material pile model and the bucket finite unit model. A sphere particle unit is coupled with the finite unit to establish the simulation model creatively, and model data required for simulation of a cutting resistance time history are provided.

The invention relates to a structure optimization design method of a machine tool component, in particular to a key host component structure optimization design method based on a machine tool workingstate. The method comprises the following steps: A, performing multi-working-condition topological optimization based on a machine tool motion state; B, parameterization reconstruction is carried outon the geometric model combined with the optimized topological structure; C, optimizing the shape and the size based on multiple working conditions of the machine tool in the motion state; D, performing production state evaluation based on machine tool machining and assembling conditions. The method is not limited to an assembly structure needing to be optimized, but comprehensively considers complete machine mounting structures such as the motion connecting piece and the supported piece, and fully considers various motion states and various working conditions of the machine tool, so that theoptimized design index is closer to the actual working state of the machine tool, and the optimized structure is higher in reliability.

The invention discloses a Farad meter for ultrahigh capacitance detection, which comprises a Farad meter panel, wherein a Farad capacitance value display is disposed on the Farad meter panel, one side of the Farad capacitance value display is successively equipped with a Farad capacitance range selection switch, a display of a testing voltage and a leak current, a testing voltage selection switch, an inner resistance value display and an inner resistance range selection switch, a capacitance testing button and a capacitance meter reading reset button are respectively disposed under the Farad capacitance value display, a binding post of a tested capacitance is disposed under the capacitance testing button and the capacitance meter reading reset button, one side of the binding post of the tested capacitance is successively equipped with a charging control switch, a constant-current selection switch and a power source switch, and an inner resistance testing button is disposed under the inner resistance value display. The Farad meter for the ultrahigh capacitance detection disclosed by the invention can better satisfy an actual working state of the ultrahigh capacitance, wherein measuring and control data needs not to be treated by intelligent computer processing, the capacitance can be displayed clearly and objectively, the structure is simple, and utilization is convenient.

The invention discloses a device and a method for measuring an axial dimension of an aero-engine rotor. The device can achieve the assembly of all parts of a rotor combination, can apply axial loading, better accords with the actual working state of the rotor, and is higher in measurement result accuracy. The rotor coaxial device is used for supporting front and rear fulcrums of the assembled rotor combination so that the fact that all stages of rotors of the rotor combination are coaxial is ensured, and the problem of axial deviation of the rotors caused by single-point support is avoided. The blade limiting device is used for circumferentially limiting the blade of the rotor so that the problem that a measurer needs to repeatedly confirm a measuring point due to the fact that the blade is not on a measuring head movement track of the three-coordinate measuring device or the measuring head is not in contact with the blade is solved, and the measuring efficiency is improved. The three-coordinate measuring device can complete the measurement of all axial dimensions in the same rotor state, does not need excessive measurement auxiliary tools, simplifies the dimension chain calculation, and is better in universality.

The invention provides a method for calculating axial force distribution of a core soil full-length bonding type counter-pulling anchor rod, which comprises the following steps of: carrying out stress analysis on an anchor rod stress micro-unit to obtain a corresponding anchoring body control differential equation and an axial force analytic expression; according to the anchoring body control differential equation and the axial force analytic expression of the stress micro-unit, establishing a full-length bonding type opposite-pulling anchor rod mechanical model according to the situation that deformation at the segmented position of the stress micro-unit is continuous and shear stress and shear displacement are in a linear elastic relation; and according to a mechanical model, substituting the stratum and anchor rod parameters, and calculating the axial force of the full-length bonding type opposite-pulling anchor rod. The core soil full-length bonding type opposite-pulling anchor rod mechanical model is provided which satisfies the actual working state of the opposite-pulling anchor rod, considers the influence of the double-sidewall method side pilot tunnel excavation sequence, is used for predicting the axial force of the opposite-pulling anchor rod at a certain position, provides a reference for design and construction of the opposite-pulling anchor rod, can further obtain distribution curve of the axial force of the full-length bonding type opposite-pulling anchor rod along the full length of the rod body, and can obtain the axial force distribution curve only by inputting simple geological exploration parameters.

The invention discloses a method and a device for correcting a wear profile of a main bearing of an engine, which belong to the technical field of engine bearing power, and are implemented by the following steps of: establishing an elastic hydrodynamic lubrication analysis model of the main bearing, and carrying out simulation analysis on the elastic hydrodynamic lubrication condition of the mainbearing; on the basis of an elastic hydrodynamic lubrication simulation analysis result of the main bearing, correcting a design molded line of the main bearing by utilizing a finite difference grid,and establishing a wear molded line of the main bearing so as to simulate a steady state achieved after the main bearing is in running-in; and carrying out optimization analysis on the elastic hydrodynamic lubrication analysis model of the main bearing by utilizing the wear profile of the main bearing. According to the method, a steady state achieved after running-in of the main bearing is simulated through the wear molded line of the main bearing, and the actual working state of the main bearing is better met, so that the simulation precision of elastic dynamic lubrication analysis of the main bearing is improved, and the misjudgment rate of the reliable durability of the main bearing is reduced.