## 1 Introduction
The geometric structures of these three components all have a direct impact on the magnitude and fluctuation level of the hydraulic radial force on the impeller. Regarding the suction chamber, [PERSON] et al. [25] carried out a numerical simulation of the internal flow field of a double-suction centrifugal pump with a semi-spiral suction chamber. They proposed that adding a baffle in the suction chamber can reduce the pressure pulsation amplitude within the impeller and the overall radial force exerted on the impeller. In terms of the volute, [PERSON] et al. [26] found that after changing the geometric shape of the single volute to a double one, the radial force and pulsation amplitude on the impeller during the starting process of the centrifugal pump can be effectively reduced. At the rated rotational speed, the radial force can be reduced by approximately 80%. However, the vector distribution of the radial force for the double volute type is more complex and disordered than that of the single volute type. Due to the complex shape of the impeller blades that rotate at high speeds, many researchers have focused on design improvements for the impeller structure. For example, [PERSON] [27] et al. compared the influences of single suction and double-suction impellers on pressure oscillation and radial force, respectively. The results showed that the double-suction impeller can promote a relatively uniform flow at its outlet and alleviate the interaction effect between the impeller and the volute, thus effectively weakening the hydraulic radial force on the impeller. In addition, adjusting the hub size [28], the tip clearance [29], and the key size parameters of the blades such as the blade thickness, outlet angle, and curvature [30] are also important means to achieve the suppression of the hydraulic radial force on the impeller. Although a large number of studies have been conducted on the evolution laws and fluctuation characteristics of the hydraulic radial force on the centrifugal pump impeller under different flow conditions and different structures and have provided certain theoretical guidance for the suppression of the hydraulic radial force on the impeller in the field of engineering design, most existing studies regard the impeller as a whole. A multitude of studies have delved into the evolution laws and fluctuation characteristics of the hydraulic radial force acting on the centrifugal pump impeller under diverse flow conditions and various structural setups. These studies have furnished theoretical guidance for the suppression of the impeller's hydraulic radial force within the realm of engineering design. Nonetheless, the majority of existing research endeavors consider the impeller as an integrated entity. By means of computational fluid dynamics (CFD) technology, they predict the hydraulic radial force of the impeller under different structural and operating condition schemes, so as to help designers screen out better schemes. In many industrial application scenarios, although the above-mentioned \"design-simulation-iteration\" process has achieved certain improvement effects in reducing the force level, limited by the complex and changeable time-frequency characteristics of the hydraulic radial force on the impeller, it is unable to deeply reveal the internal relationship between the local flow field excitation and the overall radial force characteristics. As a result, the relevant optimization design work lacks sufficient pertinence and efficiency. Based on the logical framework driven by data, this paper takes an end-suction centrifugal pump as the research object. Through high-precision CFD simulation, an impeller hydraulic load dataset covering multiple operating conditions is constructed, and the composition mechanism and variation characteristics of the hydraulic radial force of the centrifugal pump impeller are analyzed through data analysis and mining.