The multi-stage pump null which uses the steel sheet make intermediate casing and the said intermediate

摘要

PURPOSE: To eliminate a need for a machining work and to prevent the occurrence of an error by a method wherein a cylinder part on the faucet protrusion side connected to a bottom part and a cylinder part on the faucet recessed side provided at an opening end part with a flange part are formed integrally with each other on both sides of the central part of the cylindrical side part of an intermediate casing. ;CONSTITUTION: The intermediate casing of a pump is formed such that a steel plate is press-molded to form a body (a). In this case, a cylinder part 23 on the faucet protrusions side connected to a bottom part 22 is integrally formed on one side of a central part 2'Meanwhile, a cylinder part 25 on the faucet recessed side provided at an opening end part with a flange part 26 is integrally formed on the other side of the central part 21. In which case, the outside diameter of the central part 21 is set to a value higher the outside diameters of the cylinder part 25 on the faucet protrusion side and the outside diameter of the flange part 26. An adjoining other cylinder part 25 on the faucet recessed side is fitted in the outside diameter surface of the cylinder part 23 on the faucet protrusion side and the end face of a rise on the bottom part 22 side is brought into contact with the end face of adjoining other flange part 26.;COPYRIGHT: (C)1994,JPO