Advanced Materials Research Vols. 201-203

Abstract: A new hybrid active power filter (NHAPF) and its corresponding controlling method are proposed in the paper, which can be applied in high voltage system. The topology structure of NHAPF is given and its compensating principle is described. The corresponding controlling method is a power direct control, which need not the lower pass filter and improve the performance of detecting precision and velocity. Simulating results show that the feasibility and validity of the compensated system. Harmonic currents and reactive power are compensated well.

Abstract: To solve technical problems of current roller conveyor, such as big volume, complex structure and heavy maintenance workload, a new roller conveyor has been researched by adopting advanced technology of three-phase A.C linear motor. It has no intermediate transmission units that exist in the conventional roller conveyor, and is a new form structure of the conveyor. The device consists mainly of rollers and linear motors. The roller serves as driving and load-bearing mechanism, and as the rotor of linear motor, too. In the process of operation, with rollers served as the carriers, the friction force between rollers and objects transmits the motion consummately to achieve the goal of transportation. This new conveyor can completely replace the current various types of roller conveyor with such features as simple structure, low failure rate and cost.

Abstract: The paper chooses SolidWorks as the developing platform and Electric Equipment as object, researches into the principle of redevelopment by parameter-driving based on 3D feature modeling system of SolidWorks is introduced. Intelligent-CAD system is developed oriented to Electric Equipment by the parametrization structural design actuation technology, the manufacture characteristic automatic diagnosis and the extraction technology, the manufacture characteristic and the design resources, the design knowledge intelligence matching technique and so on. Through applies this system, we should develop the parametrization model of vise crucial element quickly, should extraction and memory components characteristic information and completion of the design features and design resources, design knowledge matching, and so on. The system should achieve to quickly finish product design, to shorten the development cycle and reduce product development costs.

Abstract: According to the quality problems in one saw blade enterprise, six Sigma theory and method are used to improve the quality o f saw blades, and establish the 6σ DMAIC improvement model. Six sigma DMIAC procedures are applied to define the problems and set at target for improvement, the main quality are investigated， and measurement systems and process capability are evaluated. Then, we set a specific program for the improvements. At last, the project is successfully implemented, result shows that failure rate reduced to 0.3%, DPMO dropped below 160, and the process capability is improved largely.

Abstract: High hardness and abrasiveness, low ROP and seriously deviation are the features of Shanle block Xishanyao formation in Turpan-Hami Oilfield, whose lithology was conglomerate, glutenite, interbedded sandstone, large angle of bedding and many fractures. To enhance ROP at this high hardness and abrasive region, designing of PDC bit is introduced based on crown shape, blade, teeth, bit hydraulics and so on. The designed bit had a good performance in the test of Well He-3 at Shanle block.

Abstract: The integrated multilayer-wrapped high pressure vessel is a special kind of multilayered pressure vessel whose circumferential weld seams are able to be in an offset pattern. The fabrication quality is assured by controlling the gaps of the layers. The tightness of the wrapped layers can be inspected by the hydrostatic test. The stress at the outer shell of a DN1400 urea synthetic reaction tower of the integrated multilayer-wrapped has been measured at the time of the hydrostatic test. The results show that the longitudinal stress is identical to that of the theoretical value, and the ratio of the measured circumferential stress to the theoretical calculated one of the corresponding solid shell vessel is more than 0.5 when the hydrostatic test pressure reaches the design pressure. The averaged ratio of the measured circumferential stress to the theoretical calculated one is 0.61 of the two measured sections at the hydrostatic test pressure of 20 MPa. The conclusions are: (1) the fabrication quality of the integrated multilayer-wrapped high pressure vessel are able to be assured, and (2) the tightness of the wrapped layers can be inspected by measuring the circumferential stress at outer shell, and compared to that of the theoretical value of the corresponding solid shell vessel, and (3) it is realizable that the circumferential stress at outer shell of the multilayer-wrapped vessel being not less than 50% of that of the theoretical calculated one of the corresponding solid shell vessel at the design pressure.

Abstract: This paper discuss the develepment of constant-universal joint and bing up a new type of constant-universal Joint through analysing the advantages and disadvantages of constant-universal joint and simulation of movement with PROE that testified its possibility of constantspeed.the new type constant-universal Joint can attain the same function of Thomson constant-universal Joint,iding capacity,low friction loss and bearing axial load.Further,it get a more effective centring type.

Abstract: More and more attention is being paid to extrusion with multi-hole die in the manufacturing industry because of its advantages of high efficiency, high accuracy. However, there is a key factor that need to be taken into cosideration, such as diehole lacation on the multi-hole die. A optimization strategy integrated regression analysis for the multi-hole die design in profile extrusion process based on finite element simulation, GA, and regression theory was proposed, and an optimized model is established to predict the best location of diehole. A few examples show that the strategy is effective, feasible, and the model is accurate, applicable.

Abstract: Aiming at the quality early warning problem of manufacturing process, this study develops a quality early warning system base on Web form design, combining some auto parts companies operating practice. In addition, it analyses the design principle and application methods of the system. It has been proved that the system achieves real-time monitoring, diagnosis, early warning to abnormal volatility, and prevents the defective products from occurrence and outflow, and gives corresponding diagnosis views to abnormal fluctuations according to historical data. It has been proved that this system is effective in practice.

Abstract: Zhoushen Well X1 is a deep and exploration well, there are some difficulties in drilling fluids treating: The borehole is large, the open hole is long and the rock density proportion is high in the overlying strata. So the drilling fluids must have good suspended and sand carrying; there are brown mudstone, gypsum mudstone and light gray fine sandstone in the lower strata, swelling and hole shrinkage always happen. So the key point is ensuring well wall stability and preventing swelling and hole shrinkage. The drilling fluids must have strong Calcium-tolerance and good compatibility with formation for coping the swelling and hole shrinkage of the high conductivity mudstone in the deep well section. Because well temperature is high in the lower section, the stability of anti-high temperature is very important. The drilling fluids must have prevention against high temperature denseness ability and good rheological property.