PEP - II pump gear with shaft, with perfect hardening process, a longer working life can be obtained. "D" type bearings is a combination of forced lubrication mechanism of the polymer surface of the bearing, and returns to the pump suction side, in order to ensure effective lubrication of the axis of rotation. This feature reduces the possibility of polymer retention and degradation. Precision machining of the pump body can make "D" type bearings and gear shaft precise coordination, ensure not eccentric gear shaft, in case the gear wear and tear. Parkool seal structure constitute a water-cooled sealed together with the ptfe lip seal. This shaft seal is actually not contact surface, its sealing principle is the polymer cooled to a half molten state to form a seal. Can also be used Rheoseal seal, it tables inside the shaft seal has reverse spiral groove processing, can make the polymer was back pressure back to imports. For ease of installation, the manufacturer has designed a ring bolt mounting surface, so that to match the other equipment flange installation, which makes the cylinder flange manufacture more easily. PEP - II gear pump with the heating elements match the specifications of the pump, are available for user selection, this ensures fast heating and heat control. Unlike pump in heating mode, these elements damage is limited to a board that has nothing to do with the entire pump.
Gear pump by an independent motor drive, can effectively block the upstream pressure fluctuation and flow fluctuation. In the gear pump outlet pressure pulsation can be controlled within 1%. Using a gear pump in the extrusion production lines, can improve the flow output speed, reduce the material in the extruder shear and the resident time, reduce the extrusion temperature and the pressure pulsation in order to improve productivity and product quality.
2. The mechanical design
Abstract: the machine is composed of mechanical devices and other components. It is a device used to convert or transfer energy, such as engines, turbines, vehicles, cranes, printing machine, washing machine, camera, camera and so on. Many of the principles and design method is not only applicable to the design of the machine, also apply to the design of the machine. Terms of the meaning of "mechanical design" rather than "mechanical design" is more widely some, mechanism design, including mechanical design. Based on the analysis of motion and the design structure, want to the products and future maintenance in mechanical design must also be considered. In the field of mechanical engineering and other engineering fields, all of which need to mechanical equipment, such as switches, CAM, valves, vessels, mixer, etc.
Keywords: design process design rules of mechanical design
The design process
Design before you start to think of the machine's actuality, existing machine need in durability, efficiency, weight, speed, or cost improvement. A new machine must have the function of the machine can perform before.
In the initial stages of design, designer should be allowed to give full play to the creativity, and not subject to any constraints. Produced even though many impractical ideas, also can in the early stages of the design, namely before the drawings are correct. Only in this way, not to block innovation of thinking. Usually, and several sets of design scheme is put forward, and then compared. Is likely to be a final decision on the plan, the use of some are not in the plan.
Generally when to analyzing characteristics of the shape characteristics and the size of the component parts thoroughly, can the comprehensive design and analysis. Then more objective analysis the superiority of machine performance, and its safety, weight, durability, and cost competitiveness within the results of the analysis must also be considered. Each critical part to optimize its scale and size, also want to keep in harmony with the other components.
Also want to select raw materials and processing methods of raw materials. By mechanics principle to analysis and implement these important features, such as the static response of the best use of energy and friction, as dynamic inertia, acceleration and energy; Including the strength of the elastic material, stress and stiffness of the material such as physical properties, as well as fluid lubrication and fluid dynamics of the drive. Design process is a process of repetition and cooperation, whether formal or informal, and each stage is very important for designers. 齿轮和轴机械设计英文文献和翻译(3):http://www.youerw.com/fanyi/lunwen_299.html