Stainless steel submersible pumps, speaking contrary to the process since I know two broad categories: the stamping parts, also called deep drawn parts, used stainless steel plate welded stamping. Shaft with stainless steel bar machining, impeller made of stainless steel plate welding, auxiliary parts are PTFE, it can increase the anti-corrosion. Sealed with double mechanical seal, used motor oil-filled serp. Sewage pump impeller is closed.
Another type is cast stainless steel submersible pumps, using precision casting, impeller is closed impeller, electrical motors for the dry, seal is double mechanical seal, is different motor. Cast stainless steel submersible pump is seen relatively strong, suitable for operations such as mine.
Stamping isn't as strong, portable, lightweight body.Deep drawn parts is directed on the polymer in the polymer chain oriented on the inside direction of external forces, so seeking improve the mechanical properties of polymer structure too method. Stretching can be divided into two uniaxial and biaxial stretching, ad units making chain oriented a single direction along which to chain orientation along the plane were ordered.
Deep drawn parts process is usually higher this glass transition temperature under conditions because of. Orientation of uniaxial and biaxial orientation of polymer produced can be made anisotropic (mechanical, optical, thermal, electrical, etc.), biaxial orientation for the direction within the plane is random molecular chain associated. Crystalline polymer deep drawn parts deformation when the ball prior to the crystal can be damaged, partially folded chain lamellae pulled into straight-chain, under certain conditions could be structured and arranged in the deep drawn parts direction completely extended chain crystals.
Polymer formed during the stretching of this specific new structure, commonly in order to as actin crystal podium. In the process of that formation increased the regarding straight segments, reducing cash advances of folded segments, while increasing relationship between lamellae chain, thereby increasing the mechanical strength and toughness of polymers.
Application of deep drawn parts pieces. Uniaxial tension is to raise the strength of chemical fiber an important means. Funds ratio of fiber length after stretching to define the fiber of draw ratio. As the draw ratio increases, the fiber modulus and strength have amplified. Hope in the spinning process create as up to possible straight-chain structure to creating a high strength, high modulus synthetic fibers (such as polyamides fibers).
Film uniaxial tension parallel to the direction together with deep drawn parts strength with draw ratio growth. However, the direction perpendicular to the deep drawn parts strength of the fall and a degree of uniaxial tension of polymer film will also lead to fibrillation. Therefore, it one other an approach of manufacturing fiber is important. Biaxial stretching is to improve the performance of polymer film or sheet is actually important way in which. Biaxial stretching can be employed to prevent the uniaxial tension in the film plane direction perpendicular to the deep drawn parts strength variation of this shortcomings of biaxial deep drawn parts stretching with the product than others who would not have greater deep drawn parts strength and impact toughness now. Therefore, the biaxial stretching in the film could be used for top performance requirements of base films and audio tapes, video tapes, etc. with base.