News

Pump housing molds play a crucial role in the manufacturing industry, primarily producing the casings needed by factories through metal forming processes (die casting or casting).

As the core pressure-bearing component of pump systems, the casting quality of pump casings directly determines operational stability, service life, and safety performance. Across industrial applications—from centrifugal pumps for agricultural irrigation to corrosion-resistant pumps in chemical plants, and high-temperature/high-pressure pumps in power systems—these cast casings play an indispensable role. High-quality casings effectively withstand medium pressure and resist corrosion, ensuring smooth fluid flow. Conversely, substandard casings may develop leaks or cracks, potentially causing equipment failures or even safety incidents. Therefore, in-depth research into material selection, process optimization, quality control, and technological innovation for pump casings is crucial for enhancing the overall performance of pump systems.

Abstract: This paper focuses on the locations, causes, and improvement measures of cracks that are prone to occur in the pump body of multi-stage pumps during sand casting. Starting from the structure of the multi-stage pump body and combining with the key processes of sand casting, a systematic analysis is conducted. The study indicates that the flange connection area of the multi-stage pump body, the root of the blades, and the areas with sudden changes in wall thickness are the high-risk points for cracks. The main reasons are structural stress concentration, improper casting process control, and the characteristics of stainless steel material. The main text deeply explores the influence mechanism of each process on casting defects (such as cracks), and proposes targeted optimization solutions, including improving the structural design, enhancing the strength of the sand mold, and controlling the pouring parameters. The full text emphasizes reducing the occurrence rate of cracks in the casting pump body through refined operation management and improving the reliability and production efficiency of the stainless steel multi-stage pump body.

From August 27th to 28th, 2025, the large domestic state-owned enterprise Shenyang Blower Works Group Nuclear Pump Co., Ltd. came to our company for factory inspection.

The pump casing is usually a closed metal shell that is used to contain the rotating parts and other important structures of the pump. During the operation of the pump, it plays a role of protection and support to ensure the normal operation of the pump.