Wear reduction device for rotary solids handling equipment
US8979476B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 21, 2011 |
| Grant date | Mar 17, 2015 |
| Priority date | — |
| Expiry date | Aug 16, 2033 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04D29/167
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A pump for solids handling is provided having a suction liner in combination with an impeller. The suction liner has a suction liner spiral design. The impeller has forward curved impeller suction side pump out vanes. The suction liner spiral design and the forward curved impeller suction side pump out vanes are configured to handle solids substantially having a weight concentration (Cw)<about 40% and/or a solids size distribution <about 200 microns, and to exclude abrasive solids from an impeller/suction side liner gap by increasing the resistance to slurry flow from a high pressure area at the periphery of the impeller periphery, and expel the solids which do manage to enter the impeller/suction side liner gap by guiding the solids away from a suction eye of the impeller, so abrasive erosion is substantially prevented to significantly reduce wear and a tight clearance is substantially maintained at the impeller/suction side liner gap between the impeller and the suction liner, which prevents degradation of pump performance through excessive leakage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.