Advanced Materials Research Vols. 201-203

Abstract: Different varieties of hemp (Canabis sativa L.) are cultivated in many regions in China for the production of hemp plant fiber. The objective of this study was to evaluate differences in the growth cycle, yield, quality of fiber and spinnability among the different varieties. We analyzed and compared the yield, fiber percentage, chemical components, breaking strength and spinnability, which determines fiber combing yield and fineness, of different hemp fiber from eight C. sativa varieties (Longjiang 1#, USO-14, Yun-hemp 1#, Shandong hemp, Qingshui hemp, Ningxia 6757, Ningxia 6762, and USO-31). We analyzed the data with a gray near-optimized method to select the variety of hemp that gave the best quality of fiber and was, therefore, the most suitable for cultivation in Heilongjiang Province. The results identified Longjiang 1# as the most suitable variety, USO-14 is the next best, and Yun-hemp 1# as the least suitable.

Abstract: An analysis method for commonality of module & part in modular product family was put forward. The part and module commonality in module layer and component part layer of product family were identified, respectively. The formulations of the two commonalities take into account amount of component part or module, variety, volume, price/cost of the part or module, size, geometry, material, manufacturing process, assembly. According to the source of parts, the mathematical formulas of self-made parts and purchased parts were set up respectively in the component part layer. Finally, an example of drive axle of wheel loader was given to indicate the effectiveness of the proposed method.

Abstract: Research and development are made about reciprocating air-cool oilless compressors series products in order to meet maket demond. Piston pings and guiding pings are made by filled PTFE material to achieve the oilless lubrication between cylinders and pistons. Grease lubrication bearings are used and designed in structure to achieve the oilless lubrication of connecting rod larger heads, connecting rod smaller heads and main bearings. The optimal dynamic balance can achieve by a new-type dynamic balance system which are made up of inner balance weight and outer balance weight to make the compressor run stationary. The crankcase bottom are all opened, three-stage fans are used to cool the compressor, these make the compressor cool better to improve the compressor life. The radius-length ratio λ is taken as 1/6 to 1/7 to reduce side pressure greatly. The reciprocating air-cool oilless compressors series products have better properties, can run smoothly and reliably and go into mass production.

Abstract: The small landslide physical model testing frame was designed and made in order to analyze the induction mechanism of landslide by rainfall and reservoir water level variation by adopting the physical model tests. It is consisted by exterior frame, internal body box, water supply and discharge pipelines, hoisting jacks and steel rollers. Some functions such as uniform sample preparation, confined effect reduction, lifting flexibility as well as water level change simulation and so on are realized through some design technologies like removable model frame, adjustable width, rotatable frame body ,mobile model frame and water supply and discharge pipeline and so on.

Abstract: This paper offers five factors affecting the design of product innovation. It involves that demand and need, the development of science and technology, enterprise, society and nature. Through the analysis, the author built a relational graph of the five factors affecting the design of product innovation.

Abstract: This paper deals with the energy-saving product design involving the product energy property into design process. On the basis of the energy factors concepts, the paper analyzes the extraction process and energy effectiveness model of energy factors. To study the air-conditioning refrigeration system, the paper establishes the energy information model, recognizes the crucial and controllable energy element and extracts the energy factor set C = {compressor volumetric efficiency λ, motor efficiency ηd, power frequency fd, heat transfer performance coefficient φ, finned lateral general area Ao}. Then it makes a further decomposition of coupling energy factors λ, φ and finds out the corresponding design parameter. In the end, the paper maps the energy factors and design parameter into design process, establishes the energy effectiveness model and presents several measurers for decreasing the energy consumption during the actual use of air-conditioner.

Abstract: In order to grasp the direction of product upgrading and promote the innovation capability of enterprise, a model of innovative evolution process for Product Platform is proposed based on Evolutionary Design. The model consists of five parts. The product platform module genes expression is an important part of this model, the acquisition and operation of genes was highlighted during its evolution process. Finally, a sample was given expressing the method as mentioned before.

Abstract: The detailed design and development of the intelligent creel mechanical structure and control system is based on the research and analysis of specific operation and practical functions, which realizes its functions of intelligent analysis, right amount of supply and prompt storing. As the transmission of the carpet yarns from the storage unit to the loom, the intelligent creel is able to automatically make analysis of the usage amount of different yarns according to different orders, makes more reasonable supplies to the loom and prepares yarns before used up, which makes best use of the yarn and increases the production efficiency. Meanwhile, a lot of time and labor of replacing yarns is saved.

Abstract: This paper gives the evaluation method of the design scheme of power transmission system and builds the evaluation index system and fuzzy comprehensive evaluation model based on the index of dynamic property and energy consumption economy of battery electric vehicle. And the evaluation index system and evaluation model can be used to provide basis for the decision of the design scheme.

Abstract: Variant design has been recognized as an effective measure to implement mass customization. Assembly consists of different types of parts. Its variant design is a profound issue need to be explored. Three aspects were discussed in this paper, namely, 1) part classification and dimension constraint satisfaction priority, 2) part reuse, 3) dimension conflict and variant postponing. Firstly, dimension constraint network among parts was constructed based on graph. And variant dimension transferring was exploited. Secondly, reusable part can be found from existing parts through similarity analysis. Thirdly, aiming at dimension constraint conflicts, variant postponing was proposed to concentrate variant design to few parts so as to reduce the number of variant part.