IPC分类号：
F04D29/62 | F04D29/42 | B22F3/105 | B23K15/00 | F04D29/02
国民经济行业分类号：
C4320 | C3442 | C3441 | C3462
当前申请(专利权)人：
FLUID HANDLING LLC
原始申请(专利权)人：
FLUID HANDLING LLC
当前申请(专利权)人地址：
8200 N. Austin Avenue, Morton Grove, Illinois, US
代理机构：
WÖRZ, VOLKER ALFRED
摘要：
A pump features a trimmed impeller having a trimmed impeller diameter that is less than a standard full-sized diameter of a standard full-sized impeller for a standard full-sized casing, and having a circumferential outer edge; and a modified standard full-sized casing having dimensions corresponding to the standard full-sized casing and configured to house the trimmed impeller for pumping a fluid, having an outer peripheral wall, and having an inner annular volute portion between the circumferential outer edge of the trimmed impeller and the outer peripheral wall configured with a volume of material deposited using an additive manufacturing process so as to fill in vacant space otherwise caused by the trimmed impeller diameter being less than the standard full-sized impeller diameter. The additive manufacturing process is a directed energy deposition.
技术问题语段：
The technical problem of this patent is to find a better way to make a pump with a trimmed impeller using a standard full-sized casing, which is more efficient than the existing methods that change the annular geometry of the pump when the impeller is trimmed.
技术功效语段：
The patent text describes a new technique to improve the efficiency of a pump by filling in the volute or other annular geometry using a common casing and a trimmed impeller. The technique matches the trimmed impeller's hydrodynamic properties with the annular geometry, which is achieved by using a unique technique that ensures a better match between the two. Overall, this technique helps to create a more efficient pump, even when using a trimmed impeller instead of a full diameter impeller.
权利要求：
1. A pump (2; 2'; 2"; 3) comprising: a trimmed impeller (2b') having a trimmed impeller diameter that is less than a standard full-sized diameter of a standard full-sized impeller (2b) for a standard full-sized casing (2a; 2a'), and having a circumferential outer edge (FT), characterized in that the pump (2; 2'; 2"; 3) comprises a modified standard full-sized casing (2a") having dimensions corresponding to the standard full-sized casing (2a; 2a') and configured to house the trimmed impeller (2b') for pumping a fluid, having an outer peripheral wall, and having an inner annular volute portion (Vp', Vp3) between the circumferential outer edge (FT) of the trimmed impeller (2b') and the outer peripheral wall configured with a volume of material deposited using an additive manufacturing process so as to fill in vacant space (Vc') otherwise caused by the trimmed impeller diameter being less than the standard full-sized impeller diameter.
2. A pump (2; 2'; 2"; 3) according to claim 1, wherein the additive manufacturing process includes a directed energy deposition.
3. A pump (2; 2'; 2"; 3) according to claim 1 or 2, wherein the volute (V) includes an impeller cutaway that has an extended impeller cut-away portion (3c, 3d, 3e) formed with a corresponding volume of material deposited using the additive manufacturing process.
4. A method of making a pump (2; 2'; 2"; 3) having trimmed impeller (2b') using a standard full-sized casing (2a; 2a'), characterized by configuring a trimmed impeller (2b') having a trimmed impeller diameter that is less than a standard full-sized diameter of a standard full-sized impeller (2b) for a standard full-sized casing (2a; 2a'), and having a circumferential outer edge (FT); and configuring a modified standard full-sized casing (2a") having dimensions corresponding to the standard full-sized casing (2a; 2a') and configured to house the trimmed impeller (2b') for pumping a fluid, having an outer peripheral wall, and having an inner annular volute portion (Vp', Vp3) between the circumferential outer edge (FT) of the trimmed impeller (2b') and the outer peripheral wall configured with a volume of material deposited using an additive manufacturing process so as to fill in vacant space (Vc') otherwise caused by the trimmed impeller diameter being less than the standard full-sized impeller diameter.
5. A method according to claim 4, wherein the method comprises using a directed energy deposition as the additive manufacturing process.
6. A method according to claim 4 or 5, wherein the method comprises forming an impeller cut-away of the volute that has an extended impeller cut-away portion (3c, 3d, 3e) with a corresponding volume of material deposited using the additive manufacturing process.