Gear pump operation should pay attention to matters

1, gear pump end and pump cover wear repair gear end face and pump cover the plane between the left a certain gap, said the end gap. Work wear and tear on the contact surface between the gear end face and the pump cover plane will increase the gap of this face, when the limit is exceeded, the pump oil will have a significant impact. When the gear end wear, the end surface can be polished, and then grind oil pump housing decomposition surface to ensure that the pump end clearance in the required range. 2, Diesel gear oil pump drive shaft and bushing repair after wear As the oil pump gear itself and the passive gear meshing generated by the radial thrust, easy to shaft and bushing bore eccentric wear and tear, increased clearance. Therefore, gear pump oil will leak due to increased clearance for the reduction of fuel supply. Drive shaft and bushing wear, you can repair journals or repair bushing method to restore coordination gap. In the minor wear of the journal, simply press the old sleeve put on the new sleeve, and the shaft can not be repaired, so with the gap can be restored to the allowable range. In the shaft and bushing wear are very serious, with a large increase in the gap, not only to replace the bushing, and the shaft also applies chrome or vibration welding to increase the diameter, and then grinding to the standard size to restore the journal and Bushing requirements. 3, the pump housing cavity and gear wear repair Pump housing cavity and gear wear, a significant impact on the pump oil. Gear pump when the shaft and the bushing or shaft hole wear serious, work in the tooth top and pump housing cavity surface will have an undivided contact. And because the pressure of the oil chamber is higher than that of the oil chamber, under the action of pressure difference, there is more contact between the tooth top and the oil inlet chamber of the pump housing. As a result, the cavity of the pump housing is more worn there, Top clearance increases. As a result, the pressure difference between the oil pump inlet and outlet oil chambers is reduced, and the effect of scraping oil and pressure oil on the gear teeth is reduced, resulting in a decrease of the oil supply pressure and a decrease of pump oil. The pump chamber cavity wear generally adopt lumen inlay method to be repaired.

Products made from WPC are suitable for indoor and outdoor use. Their properties are customisable depending on the ingredient composition. Numerous products are already available on the market; additional products are expected for the next few years.
WPC Products have already been used successfully in many areas:
Building industry
Furniture industry
Automotive industry
Measurement engineering

Wood plastic composite Marketing Opportunities
In recent years, the market of wood plastic composites in North America has increased greatly and attracted the interest of both the plastics and the forest products industries. These wood-based composites have been successful in the marketplace primarily because they deliver consistently appropriate structural performance at a reasonable cost.
In the building community, there is a growing demand for high-performance, low-maintenance, and low-cost building products. To meet this demand, natural fiber thermoplastic composites are being used to produce such products as landscape timbers, railing, decking, fence, window and door elements, panels, molding, roofing, and siding, even floor ,louver, and indoor furniture have been reported. Some research point that wood plastic composites have become a major player in the North American decking market. Qizhen indicate that the advantages of wood-plastic composites can cause increase demands for value-added products made from them, and the market will increase dramatically in the near future and continue to grow in long-term. Recycling may help the wood-plastic composites industry as the recycling industries prepares for their future materials and their needs.
The demand of wood pallets and shortage of solid wood provide a large market for wood plastic composites in North America and Asia region. Besides, wood pallets and shipping crates represent a large source of raw material available for use in value-add composites. Recycling and reproducing would provide good market for wood-plastic composites. Furthermore, some synthetic materials can provide additional market for recycled plastic.
The phase-out of chromated copper arsenate (CCA) may give wood plastic composites opportunities to increase awareness of alternatives to CCA-treated lumber. Kamdem et al. studied the properties of wood-plastic composites made of wood flour from CCA-treated wood and recycled HDPE.
Lignocellulosics will be used in the future to produce a wide spectrum of composite products ranging from very inexpensive, low-performance materials to materials that are relatively expensive and have high-performance characteristics. Taking advantage of the wide distribution, renewability, and recyclability of lignocellulosics, more markets will be developed for low-cost renewable materials. By chemically modifying the lignocellulosic cell wall to overcome some of its disadvantageous properties, new markets for high-performance composites will develop.
By incorporating continual new product development into a firm`s R&D process, the forest products industry can greatly benefit through increased profitability, improved customer and stakeholder perceptions, and reduced risk of litigation and regulation. Moreover, concurrent new product and market development efforts, integrating customer needs back into the design and engineering of new products, will provide competitive advantage to WPC industry innovators.
In Asia region, market for wood-plastic composites has just started recently, and has more potential than North America because of the great market demand and the shortage of wood. Especially in mainland China, market may increase with Olympic 2008 in Beijing. The constructions of civil buildings will also provide opportunities for wood-plastic composites applications.
The future of WPC will depend on many factors, including new product identification, product quality, consumer reaction, and success of research and development efforts. Success will also depend on how well the forest products and plastics industries continue to establish relationships and work with each other.

WPC Application

Wood Plastic Composite Products, WPC Products, Outdoor Decking, Outdoor Decking Board

Shangyu YongSheng New Material Co., Ltd. , http://www.wpc-deckingboard.com