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在多级离心泵中作为平衡转子轴向力用的卸荷装置(平衡盘)上,工作端面间隙是由两块板构成,一块是固定不动的(图1,止推盘1),第二块(卸荷盘2)是转动着的。热电站给水泵的卸荷装置是在高压差(10～20兆帕),颇大的轮盘圆周速度(80～120米/秒)及窄的端面间隙(0.1～0.2毫米)的条件下运转的。该卸荷装置是决定泵的可靠性和经济性最重要的部件之一,并对泵的计算精度提出了更高的要求。然而,已知的计算流经平衡盘端面缝隙泄漏量的方法却不考虑轮盘的回转。在评价回转对流经端面缝隙泄漏量的影响
In multistage centrifugal pumps, as the unloading device (balancing disc) used to balance the axial force of the rotor, the working end surface clearance is composed of two plates, one is fixed (FIG. 1, thrust plate 1), the Two (unloading tray 2) is rotating. The thermal power station feed pump unloading device is operating at high pressure differential (10 to 20 MPa), considerable disc circumferential speed (80 to 120 m / s) and narrow end clearance (0.1 to 0.2 mm) of. The unloading device is to determine the reliability and economy of the pump one of the most important components, and the calculation of the pump made higher requirements. However, the known method of calculating the amount of leakage through the end face of a balance disc does not consider the revolution of the wheel. In the evaluation of rotary convection flow through the end gap leakage