公开(公告)号：US06261055B1

公开(公告)日：2001-07-17

申请号：US09366478

申请日：1999-08-03

申请人： Jerzy A. Owczarek

发明人： Jerzy A. Owczarek

IPC分类号： F01B2502

CPC分类号： F01D9/02 ,  F01D1/02 ,  F01D25/30 ,  F05D2250/52

摘要： An annular diffuser having its inlet located at the exit of a last row of blades of a steam turbine having initially very slowly increasing cross-sectional area with distance to accommodate the diffusion produced by the decaying wakes in the diffuser so as to prevent flow separation from diffuser walls and as a result to foster the diffusion process and to increase the efficiency of the steam turbine. The rate of increase of cross-sectional area, which is much smaller than that appropriate in diffusers having uniform incompressible flow at their inlets, allows wakes which form near the trailing edges of the last turbine blades to dissipate while avoiding flow separation. In the diffuser of this invention, whether it is one of fixed shape or one whose cross-sectional area can be changed by making use of an adjustable guide vane which surrounds at least a portion of the bearing cone, at a distance from inlet of one half of diffuser height at inlet, the cross-sectional area increase is smaller than 5.0% of the inlet cross-sectional area. This is equivalent to the corresponding two-dimensional straight-wall diffuser angle of, approximately, 2.9 degrees. For the diffuser whose cross-sectional area can be changed as required depending on its inlet flow conditions, the above limit applies for preferably most of the travel path of the adjustable guide vane but at least for the adjustable guide vane position closest to the turbine last blades. The length of the diffuser of this invention, in its preferred embodiment, measured along its mean line, is larger than or at least equal to 90% of the length of last turbine blades. The outer flow guide which defines the outer wall of the diffuser should have radius of curvature at its beginning larger than one half of the length of turbine last blades and should have a horizontal tangent there.

摘要翻译： 一种环形扩散器，其入口位于蒸汽轮机的最后一排叶片的出口处，其最初具有非常缓慢增加的横截面积，具有距离，以适应由扩散器中的衰减的擦拭物产生的扩散，从而防止流体分离 扩散壁，从而促进扩散过程并提高蒸汽轮机的效率。 横截面积的增加率比在其入口处具有均匀不可压缩流量的扩散器中适当的增加，允许在最后涡轮叶片的后缘附近形成的擦拭物消散，同时避免流动分离。 在本发明的扩散器中，无论是固定形状还是其横截面积可以通过使用围绕至少一部分轴承锥体的可调节导向叶片在一个距离的入口 入口处散热器高度的一半，横截面积增加小于入口横截面积的5.0％。 这相当于相应的二维直壁扩散角约为2.9度。 对于可根据其入口流量条件根据需要改变其横截面面积的扩散器，上述极限适用于可调节导叶的优选大部分行进路径，但是至少对于最接近涡轮机的可调导向叶片位置 刀片。 在其优选实施例中，沿其平均线测量的本发明的扩散器的长度大于或至少等于最后涡轮叶片的长度的90％。 限定扩散器的外壁的外部流动引导件应该在其开始处具有大于涡轮机末端叶片的长度的一半的曲率半径，并且应当在那里具有水平切线。

公开(公告)号：US4720239A

公开(公告)日：1988-01-19

申请号：US658080

申请日：1984-10-09

申请人： Jerzy A. Owczarek

发明人： Jerzy A. Owczarek

IPC分类号： F01D5/14 ,  F01D5/16 ,  F04D21/00

CPC分类号： F01D5/141 ,  F01D5/16 ,  Y02T50/673 ,  Y10S415/914

摘要： In turbomachine apparatus having alternating rows of stator blades and rotor blades, there is provided discontinuities or nonuniformities on the downstream facing surfaces of at least one row of stator blades, the nonuniformities being adapted to disperse pressure waves reflected from downstream rotor blades. The nonuniformities may be an arrangement of grooves, ridges, or a combination of grooves and ridges on the downstream facing blade surfaces; other surface discontinuity configurations are also possible, such as an arrangement of potruding surface elements or dimples, or force-absorbing material selectively deposited on the dowstream-facing portion of the blade surfaces.

摘要翻译： 在具有交替排的定子叶片和转子叶片的涡轮机装置中，在至少一排定子叶片的下游表面上提供不连续性或不均匀性，该不均匀性适于分散从下游转子叶片反射的压力波。 不均匀性可以是在下游侧刀片表面上的槽，脊或凹槽和脊的组合的布置; 其它表面不连续构造也是可能的，例如刨花表面元件或凹坑的布置，或者选择性地沉积在叶片表面的面向朝下的部分上的吸力材料。

公开(公告)号：US06488470B1

公开(公告)日：2002-12-03

申请号：US09398863

申请日：1999-09-20

申请人： Jerzy A. Owczarek

发明人： Jerzy A. Owczarek

IPC分类号： F01B2502

CPC分类号： F01D1/02 ,  F01D9/02 ,  F01D25/30 ,  F05D2250/52

摘要： An annular diffuser has its inlet located at the exit of a last row of blades of a gas turbine having initially very slowly increasing cross-sectional area with distance to accommodate the diffusion produced by the decaying wakes in the diffuser so as to prevent flow separation from diffuser walls and as a result to foster the diffusion process and to increase the efficiency of the gas turbine. The rate of increase of cross-sectional area, which is much smaller than that appropriate in diffusers having uniform flow at their inlets, allows wakes which form near the trailing edges of the last turbine blades to dissipate while avoiding flow separation. In the diffuser of this invention, at a distance from inlet of one half of diffuser height at inlet, the cross-sectional area increase is smaller than 6.5% of the inlet cross-sectional area. This is equivalent to the corresponding two-dimensional straight-wall diffuser angle of, approximately 3.7 degrees.

摘要翻译： 环形扩散器具有其入口位于燃气轮机的最后一排叶片的出口处，其具有最初非常缓慢增加的横截面积，具有距离以适应由扩散器中的衰减的擦拭物产生的扩散，以防止流动分离 扩散壁，从而促进扩散过程并提高燃气轮机的效率。 横截面积的增加率比在其入口处具有均匀流动的扩散器中适当的增加的速度允许在最后涡轮叶片的后缘附近形成的擦拭物消散，同时避免流动分离。 在本发明的扩散器中，在入口处与扩散器高度的一半距离入口的距离处，横截面积增加小于入口横截面面积的6.5％。 这相当于相应的二维直壁扩散角约3.7度。

公开(公告)号：US06419448B1

公开(公告)日：2002-07-16

申请号：US09531541

申请日：2000-03-20

申请人： Jerzy A. Owczarek

发明人： Jerzy A. Owczarek

IPC分类号： F01D2530

CPC分类号： F01D1/02 ,  F01D25/30 ,  F05D2250/52 ,  Y10S415/914

摘要： A flow by-pass system is provided in a downward-discharging exhaust hood of a steam turbine to by-pass a small percentage of the total steam flow from the top portion of the exhaust hood to the vicinity of the condenser and in that way relieve excess pressure in the top portion incident to the more convoluted path of the main portion of steam passing from the top to the bottom and to decrease energy loss caused by friction and thus to improve turbine efficiency. The flow by-pass system includes by-pass conduits within the front portion of the exhaust hood extending from the top portion to the vicinity of the condenser. Such conduits are formed by covering over the corners between the outer and end walls of the exhaust hood and between the exhaust hood end wall and the bearing cone outside surface with by-pass walls to form flow passages in the corners behind the by-pass walls through which exhaust steam may pass from the region of higher pressure in the top portion of the exhaust hood to the region of lower pressure in vicinity of the condenser. Inlets and outlets are provided in the by-pass walls for entrance and exit of the turbine exhaust steam to the by-pass conduits.

摘要翻译： 在蒸汽涡轮机的向下排气排气罩中设置流量旁通系统，以将从排气罩顶部的总蒸汽流量的一小部分旁通至冷凝器附近，从而减轻 顶部的入口压力超过从顶部向底部通过的蒸汽主要部分的更多回旋路径，并减少由摩擦引起的能量损失，从而提高涡轮效率。 流量旁通系统包括从顶部到冷凝器附近的排气罩前部内的旁路管道。 这种导管通过覆盖在排气罩的外壁和端壁之间的角部以及在排气罩端壁和轴承锥体外表面之间的旁路壁上形成，以在旁路壁之后的角落中形成流动通道 通过该排气蒸汽可以从排气罩顶部的高压区域经过冷凝器附近的低压区域。 在旁路壁上设有入口和出口，用于涡轮机排气蒸汽进入旁路管道。

公开(公告)号：US5209634A

公开(公告)日：1993-05-11

申请号：US658224

申请日：1991-02-20

申请人： Jerzy A. Owczarek

发明人： Jerzy A. Owczarek

IPC分类号： F01D25/30

CPC分类号： F01D25/30

摘要： Apparatus for controlling the steam pressure at the exit of the last row of blades of a steam turbine by means of an adjustable guide vane assembly having a plurality of vane segments supported by the bearing cone that are moved to change the cross-sectional area of the exhaust flow passage so as to improve turbine efficiency under varying operating conditions by minimizing the average pressure in the annulus following the last row of turbine blades.

摘要翻译： 一种用于通过可调导叶组件来控制蒸汽涡轮机最后一排叶片出口处的蒸汽压力的装置，该可调节导叶组件具有由轴承锥体支撑的多个叶片段，所述多个叶片段被移动以改变所述叶片的横截面积 排气流动通道，以便通过使在最后一排涡轮机叶片之后的环形空间中的平均压力最小化，在变化的操作条件下提高涡轮效率。