IPC分类号：
F04D1/00 | F04D13/00 | F04D29/00 | F04D29/40 | F04D29/42
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 60053 US
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 addressed in this patent is the decreased efficiency of pumps that use a trimmed impeller in a pump casing. The problem is that the annular geometry of the pump casing is designed to match the full-sized impeller when it is installed, but when the impeller is trimmed, the efficiency of the pump decreases. The patent proposes a new technique to improve the efficiency of pumps with trimmed impellers by adding material to fill in the vacant space caused by the trimmed impeller.
技术功效语段：
The present invention provides a new and unique technique to improve the efficiency of a pump with a trimmed impeller. By using an additive manufacturing process to fill in the vacant space caused by the trimmed impeller, the pump can achieve better performance even when the impeller is trimmed. This technique involves configuring a modified standard full-sized casing to house the trimmed impeller and utilize the hydrodynamic properties of the annular geometry of the impeller. This approach ensures that the pump performs better than a standard full-sized casing with a trimmed impeller.
权利要求：
WHAT WE CLAIM IS:
1 . A pump comprising:
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.
2. A pump according to claim 1 , wherein the additive manufacturing process a directed energy deposition.
3. A pump according to claim 1 , wherein the volute includes an impeller cutaway that has an extended impeller cut-away portion formed with a corresponding volume of material deposited using the additive manufacturing process.
4. A method of making a pump having trimmed impeller using a standard full- sized casing, comprising:
configuring 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
configuring 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. 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, wherein the method comprises forming an impeller cut-away of the volute that has an extended impeller cut-away portion with a corresponding volume of material deposited using the additive manufacturing process.