Process for producing different lift pumps by using existing pump body mold

Abstract

The invention discloses a process for producing pumps with different lifts by using an existing pump body mold. The process comprises the following steps: step 1, selecting an original pump with performance parameters similar to required performance parameters; secondly, a volute mud core box of an original pump body is taken out, and a movable block is additionally arranged in the direction of a water outlet of a partition tongue of the mud core box; step 3, manufacturing a loam core by using the volute loam core box added with the loose piece, modeling by using an original pump body outer mold, putting a new volute loam core into a pump body core cavity, closing the box, and pouring to produce a new pump body; fourthly, the new pump body casting is machined, all the machining procedures are completed, and a new pump body part is formed; 5, after the pump body parts are qualified through the static pressure test, an original impeller is used for assembling a new pump head, performance testing is conducted on the new pump head, and if the new pump head is qualified through the test, production of different lift pumps is completed; according to the method, only one loose piece needs to be additionally arranged on an existing pump body core box mold, the manufacturing period is short, and the production cost and the cost are greatly reduced correspondingly.

Description

technical field [0001] The invention relates to the technical field of production of pumps with different lifts, in particular to a process for producing pumps with different lifts by utilizing existing pump body molds. Background technique [0002] The range of performance parameters of pump products is wide, and the performance requirements of customers are also different. Even a series of products sometimes cannot fully meet the requirements of use. Especially in recent years, due to technological requirements, the customer has increased the performance parameter requirements of a pump product from the original one working condition point to the requirements of two or three working condition points at the same time. Different flow points Corresponding to different head requirements. The specific description is: at the dead point of the pump, the head value is required to be not less than H 0 ; at flow rate Q 1 , head is H 1 ; at flow rate Q 2 , head is H 2 , and Q ...

AI Technical Summary

Problems solved by technology

It is not easy to find a pump type that can just meet the performance requirements of the three operating points at the same time, especially in the H 1 with H 2 It is even more difficult to achieve when the numerical drop requirement is large

Because if the method of cutting the outer diameter of the impeller is adopted, the heads of the three working condition points will all decrease at the same time, which cannot meet the working condition requirements

Originally, a new pump was designed according to the performance parameters of the pump body and re-molded for production, which resulted in high cost and long production cycle.

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