补汽调节阀空间多尺度精密装配控制方法研究

Research on Space Multi-scale Precision Assembly Control Method for Steam Compensating Valve

补汽调节阀技术可以降低机组额定负荷热耗,提高电网稳定性及调频能力,消除调频节流损失,被广泛应用于超超临界汽轮机组。作为一种超大型异形偏心结构,补汽调节阀焊接装配时需要多尺度精确控制同心度、组配错位、空间夹角。文章通过引入"引导装置+装配基点+激光定位",促使各阀壳组件相互作用、相互协作,共同组成"阀壳组件-力场-引导装置-力场-阀壳组件"系统和"阀壳组件-装配基点-光场-激光定位-光场-装配基点-阀壳组件"系统,该系统有效控制了组件装配的径向移动和周向旋转自由度,实现了超超临界汽轮机补汽调节阀的空间多尺度精密装配。

The technology of steam compensating regulating valve can reduce the heat consumption of the rated load of the unit,improve the stability and frequency modulation ability of the power grid, and eliminate the throttling loss. It is widely used in ultrasupercritical steam turbine unit. As a super-large heteromorphic eccentricity structure, multi-scale precise control of concentric degree, misalignment and space angle are required in the welding assembly of the steam regulating valve. In this paper, the "guide device + assembly base + laser positioning" is introduced to promote the interaction and cooperation of the valve shell assembly, and the system of "valve shell assembly-force field-guide device-force field-valve shell assembly" and the system of "valve shell assembly-assembly base point-light field-laser positioning-light field-assembly base point-valve shell group", and the system effectively controls the radial movement and circumferential rotation freedom of the assembly, and realizes the space multi-scale precision assembly of the ultra-supercritical steam turbine compensating valve.