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US 2019/0128275 A1Published application
Wear Ring for Use in a Pump
AssigneeBoulden Company, Inc.
InventorsBrian Boulden, Robert Aronen
Life of this patent
Estimating the term…
Abstract
A device is disclosed including a wear ring formed as a hollow cylinder with an inside diameter and an outside diameter. The hollow cylinder may have multiple holes through at least a portion of the wear ring from the inside diameter towards the outside diameter. The multiple holes may be passages between the inside diameter and the outside diameter that allow fluid under pressure to pass between the inside diameter and the outside diameter through the multiple holes.
Claims22
A centrifugal pump comprising:
- an impeller,
- a rotating shaft;
- a metallic wear ring for reducing axial flow of fluid under pressure between a high pressure side and a low pressure side of the rotating shaft;
- a housing;
- and
- a gap between the rotating shaft and the wear ring that allows fluid under pressure to flow across the rotating shaft through the gap;
- wherein the housing has a solid housing wall, and wherein the wear ring is inserted into the housing against the solid housing wall;
- wherein the housing has a retainer for retaining the wear ring to prevent the wear ring from moving relative to the housing;
- wherein the impeller is connected to the rotating shaft, and the rotating shaft passes through the wear ring;
- and
- wherein the wear ring has multiple holes that allow fluid under pressure from the gap to enter the multiple holes;
- wherein the wear ring has an inside surface with an inside radius (R), and a length (L), and an inside surface area, wherein the inside surface area is measured as 2(pi)RL, and wherein the multiple holes between the rotating shaft and the solid housing wall comprise a portion of the inside surface area, and wherein a combination of the portions of the inside surface area from the multiple holes is at least two percent of the inside surface area.
9 more elements
A wear ring for a rotating shaft of a centrifugal pump configured to pump a fluid under pressure comprising:
- an outer layer made from a solid metallic material;
- an inner layer contacting the outer layer, wherein the inner layer is made from a metallic material, the inner layer having a first side configured to be in close proximity to the rotating shaft with a flow of the fluid under pressure passing between the rotating shaft and the inner layer, the inner layer having a second side which is in contact with the outer layer, and wherein the inner layer has multiple holes from the first side towards the second side;
- wherein the inner layer has an inside surface with an inside radius (R), and a length (L), and the first side includes an inside surface area, wherein the inside surface area is measured as 2(pi)RL, and wherein the multiple holes comprise a portion of the inside surface area, and wherein a combination of the portions of the inside surface area from the multiple holes is at least two percent of the inside surface area;
- a shoulder extending from the outer layer toward the inner layer to prevent the wear ring from moving along the rotating shaft;
- wherein a pumped fluid flows along the rotating shaft from a high pressure side of the rotating shaft to a low pressure side of the rotating shaft;
- and
- wherein the shoulder is on the low pressure side of the rotating shaft.
4 more elements
A method of making a wear ring assembly for a pump comprising:
- a) providing a cylindrical wear ring comprising:
- i) an inside surface;
- ii) an outside surface;
- b) providing a housing comprising:
- i) a low pressure side;
- ii) a high pressure side
- iii) a cylindrical opening to receive said wear ring;
- and
- iv) a shoulder that extends over the cylindrical opening on the low pressure side;
- c) forming holes through the wear ring that extend from the inside surface to the outside surface to form an apertured wear ring;
- d) inserting the apertured wear ring into the cylindrical opening of the housing to form said wear ring assembly;
- wherein the wear ring assembly is configured to be oriented over a shaft of a pump with the high pressure side proximal to said pump.
9 more elements
Dependencies are inferred from the claim text.