CA2447872A1 - Pump bushing device and associated methods - Google Patents
Pump bushing device and associated methods Download PDFInfo
- Publication number
- CA2447872A1 CA2447872A1 CA002447872A CA2447872A CA2447872A1 CA 2447872 A1 CA2447872 A1 CA 2447872A1 CA 002447872 A CA002447872 A CA 002447872A CA 2447872 A CA2447872 A CA 2447872A CA 2447872 A1 CA2447872 A1 CA 2447872A1
- Authority
- CA
- Canada
- Prior art keywords
- pump
- bushing device
- pump bushing
- axial bore
- cylindrical body
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/04—Shafts or bearings, or assemblies thereof
- F04D29/046—Bearings
- F04D29/047—Bearings hydrostatic; hydrodynamic
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/08—Sealings
- F04D29/10—Shaft sealings
- F04D29/106—Shaft sealings especially adapted for liquid pumps
- F04D29/108—Shaft sealings especially adapted for liquid pumps the sealing fluid being other than the working liquid or being the working liquid treated
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/08—Sealings
- F04D29/10—Shaft sealings
- F04D29/12—Shaft sealings using sealing-rings
- F04D29/126—Shaft sealings using sealing-rings especially adapted for liquid pumps
- F04D29/128—Shaft sealings using sealing-rings especially adapted for liquid pumps with special means for adducting cooling or sealing fluid
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2240/00—Components
- F04C2240/60—Shafts
- F04C2240/605—Shaft sleeves or details thereof
Abstract
A pump bushing device (10) that is adapted and configured to admit pressuriz ed flushing fluid into a seal cavity of a pump, flushing debris therefrom witho ut removal of the pump bushing device, including a cylindrical body (12) defini ng an axial bore (14) extending therethrough for accommodating a shaft of a pum p; a plurality of circumferentially spaced-apart, axially-extending, angled slo ts (16) formed in an inner peripheral wall of the axial bore; and a plurality o f apertures (20) extending radially inward at an angle from the outer peripher y of the cylindrical body to the axial bore. Wherein the plurality of angled slots and the plurality of apertures receive pressurized flushing fluid.</SD OAB>
Description
PUMP BUSHING DEVICE
AND ASSOCIATED METHODS
Cross-Reference to Related Application This non-provisional utility patent application claims priority to Applicant's co-pending provisional patent application, entitled "PUMP BUSHING", U.S. Serial No.
60/297,971, filed June 13, 2001, which is hereby incorporated in full by reference.
Field of the Invention The present invention relates generally to a pump bushing device and associated methods. More specifically, the present invention relates to a rotary pump bushing that is adapted and configured to admit pressurized flushing fluid into a seal cavity of a pump, flushing debris therefrom without removal of the pump bushing.
Background of the Invention In centrifugal or rotary pumps, such as those used in Lulp and paper manufacturing, mining operations, and similar working environments, a slurry of abrasive debris may collect in a seal cavity of the pump. Typically, this debris is trapped in the seal cavity by a pump bushing that accommodates an impeller shaft of the pump. The result is increased friction, decreased pump efficiency, and decreased pump life.
Thus, what is needed is a rotary pump bushing that is adapted and configured to admit pressurized flushing fluid into the seal cavity of the pump, flushing the debris therefrom without removal of the pump bushing. What is also needed is a rotary pump bushing that has a relatively simple design, is relatively easy to manufacture, and is relatively inexpensive to produce.
Brief Summary of the Invention In various embodiments of the present invention, a rotary pump bushing is provided that is defined by a cylindrical body having an axial bore extending therethrough for accommodating an impeller shaft of a pump. A plurality of circumferentially spaced-dart, axially-extending, angled slots are formed in an inner peripheral wall of the axial bore. The angled slots receive pressurized flushing fluid through a plurality of corresponding apertures that extend radially inward at an angle from the outer periphery of the cylindrical body to the axial bore. This angular orientation of the slots and the apertures imparts rotation to the pressurized flushing fluid, aiding in the removal of debris from a seal cavity of the pump.
In one preferred embodiment of the present invention, a pump bushing device that is adapted and configured to admit pressurized flushing fluid into a seal cavity of a pump, flushing debris therefrom without removal of the pump bushing device, includes a cylindrical body defining an axial bore extending therethrough for accommodating a shaft of a pump; a plurality of circumferentially spaced-apart, axially-extending, angled slots formed in an inner peripheral wall of the axial bore; and a plurality of apertures corresponding to the plurality of angled slots, the plurality of apertures extending radially inward at an angle from the outer periphery of the cylindrical body to the axial bore. Wherein the plurality of angled slots and the plurality of apertures receive pressurized flushing fluid In another preferred embodiment of the present invention, a method for admitting pressurized flushing fluid into a seal cavity of a pump, flushing debris therefrom without removal of a pump bushing device, includes providing a cylindrical body defining an axial bore extending therethrough for accommodating a shaft of a pump; providing a plurality of circumferentially spaced-apart, axially-extending, angled slots formed in an inner peripheral wall of the axial bore; and providing a plurality of apertures corresponding to the plurality of angled slots, the plurality of apertures extending radially inward at an angle from the outer periphery of the cylindrical body to the axial bore. Wherein the plurality of angled slots and the plurality of apertures receive pressurized flushing fluid.
These and other aspects of the present invention will become more readily apparent to those of ordinary skill in the art based upon the following detailed description of the invention taken in conjunction with the drawings described herein below.
Brief Description of the Drawings So that those of ordinary skill in the art to which the present invention pertains will more readily understand how to make and use the pump bushing device of the present invention, preferred embodiments thereof will be described in detail herein below with reference to the drawings, wherein:
Figure 1 is a perspective view of one embodiment of a pump bushing adapted and configured to admit pressurized flushing fluid into a seal cavity of a pump, flushing debris therefrom without removal of the pump bushing;
Figure 2 is a side elevation view of the pump bushing of Figure l;
AND ASSOCIATED METHODS
Cross-Reference to Related Application This non-provisional utility patent application claims priority to Applicant's co-pending provisional patent application, entitled "PUMP BUSHING", U.S. Serial No.
60/297,971, filed June 13, 2001, which is hereby incorporated in full by reference.
Field of the Invention The present invention relates generally to a pump bushing device and associated methods. More specifically, the present invention relates to a rotary pump bushing that is adapted and configured to admit pressurized flushing fluid into a seal cavity of a pump, flushing debris therefrom without removal of the pump bushing.
Background of the Invention In centrifugal or rotary pumps, such as those used in Lulp and paper manufacturing, mining operations, and similar working environments, a slurry of abrasive debris may collect in a seal cavity of the pump. Typically, this debris is trapped in the seal cavity by a pump bushing that accommodates an impeller shaft of the pump. The result is increased friction, decreased pump efficiency, and decreased pump life.
Thus, what is needed is a rotary pump bushing that is adapted and configured to admit pressurized flushing fluid into the seal cavity of the pump, flushing the debris therefrom without removal of the pump bushing. What is also needed is a rotary pump bushing that has a relatively simple design, is relatively easy to manufacture, and is relatively inexpensive to produce.
Brief Summary of the Invention In various embodiments of the present invention, a rotary pump bushing is provided that is defined by a cylindrical body having an axial bore extending therethrough for accommodating an impeller shaft of a pump. A plurality of circumferentially spaced-dart, axially-extending, angled slots are formed in an inner peripheral wall of the axial bore. The angled slots receive pressurized flushing fluid through a plurality of corresponding apertures that extend radially inward at an angle from the outer periphery of the cylindrical body to the axial bore. This angular orientation of the slots and the apertures imparts rotation to the pressurized flushing fluid, aiding in the removal of debris from a seal cavity of the pump.
In one preferred embodiment of the present invention, a pump bushing device that is adapted and configured to admit pressurized flushing fluid into a seal cavity of a pump, flushing debris therefrom without removal of the pump bushing device, includes a cylindrical body defining an axial bore extending therethrough for accommodating a shaft of a pump; a plurality of circumferentially spaced-apart, axially-extending, angled slots formed in an inner peripheral wall of the axial bore; and a plurality of apertures corresponding to the plurality of angled slots, the plurality of apertures extending radially inward at an angle from the outer periphery of the cylindrical body to the axial bore. Wherein the plurality of angled slots and the plurality of apertures receive pressurized flushing fluid In another preferred embodiment of the present invention, a method for admitting pressurized flushing fluid into a seal cavity of a pump, flushing debris therefrom without removal of a pump bushing device, includes providing a cylindrical body defining an axial bore extending therethrough for accommodating a shaft of a pump; providing a plurality of circumferentially spaced-apart, axially-extending, angled slots formed in an inner peripheral wall of the axial bore; and providing a plurality of apertures corresponding to the plurality of angled slots, the plurality of apertures extending radially inward at an angle from the outer periphery of the cylindrical body to the axial bore. Wherein the plurality of angled slots and the plurality of apertures receive pressurized flushing fluid.
These and other aspects of the present invention will become more readily apparent to those of ordinary skill in the art based upon the following detailed description of the invention taken in conjunction with the drawings described herein below.
Brief Description of the Drawings So that those of ordinary skill in the art to which the present invention pertains will more readily understand how to make and use the pump bushing device of the present invention, preferred embodiments thereof will be described in detail herein below with reference to the drawings, wherein:
Figure 1 is a perspective view of one embodiment of a pump bushing adapted and configured to admit pressurized flushing fluid into a seal cavity of a pump, flushing debris therefrom without removal of the pump bushing;
Figure 2 is a side elevation view of the pump bushing of Figure l;
Figure 3 is a cross-sectional view of the pump bushing of Figure 2 taken along line 3-3;
Figure 4 is a front end view of the pump bushing of Figure 1;
Figure 5 is a cross-sectional view of the pump bushing of Figure 2 taken along line 5-S;
Figure 6 is a perspective view of another embodiment of a pump bushing adapted and configured to admit pressurized flushing fluid into a seal cavity of a pump, flushing debris therefrom without removal of the pump bushing;
Figure 7 is a side elevation view of one half of a cylindrical body of the pump bushing of Figure 6;
Figure 8 is a cross-sectional view of the pump bushing ofFigure 7 taken along line C-C;
Figure 9 is a side elevation view of another half of the cylindrical body of the pump bushing of Figure 6;
Figure 10 is a front end view of the pump bushing of Figure 6; and Figure 11 is a partial cross-sectional view of the pump bushing of Figure 9 taken along line D-D.
Detailed Description of the Invention Refernng now to the drawings, wherein like reference numerals identify like structural elements and features of the pump bushing of the present invention, there is illustrated in Figure 1 one embodiment of a pump bushing adapted and configured to admit pressurized flushing fluid into a seal cavity of a pump, flushing debris therefrom without removal of the pump bushing. The pump bushing is designated generally by reference numeral 10 herein.
Refernng to Figure 1, in one embodiment of the present invention, the pump bushing 10 includes a cylindrical body 12 including two hemi-cylindrical portions 12a and 12b that are secured together by, for example, threaded fasteners or dowel pins (see Figure S). This configuration enables the pump bushing 10 to be installed in and/or removed from a pump (not shown), such as a centrifugal pump or a rotary pump, relatively easily.
Preferably, the cylindrical body 12 has an axial bore 14 extending therethrough for accommodating an impeller shaft (not shown) of the pump.
Referring to Figures 2 and 3, a plurality of circumferentially spaced-apart, axially-extending, angled slots 16 or troughs are defined in an inner peripheral v~all 18 of the axial bore 14. For example, as illustrated in Figure 4, the centerline of each of the plurality of angled slots 16 varies or tapers approximately 0.219 inches from beginning to end. Those of ordinary skill in the art will readily appreciate that this dimension may be modified without departing from the spirit or scope of the present invention. Preferably, the angled slots 16 are radially tapered, i.e. the angled slots 16 become shallower as they approach the end of the axial bore 14. The angled slots 16 receive pressurized flushing fluid through a plurality of corresponding circumferentially spaced-apart inlet ports 20 or apertures that extend radially inward at an angle from the outer periphery of the cylindrical body 12 to the axial bore 14.
The angled slots 16 extend from the inlet ports 20 to a common annular discharge groove 22 formed at the end of the axial bore 14 (see Figure 1). This angular orientation of the slots 16 and the inlet ports 20 imparts rotation to the pressurized flushing fluid, aiding in the removal of debris from a seal cavity of the pump.
In an alternative embodiment of the present invention, each of the plurality of angled slots 16 extends directly from an inlet port groove 26 to the axial bore 14.
Thus, in this configuration, there are no corresponding circumferentially spaced,apart inlet ports 20 or apertures that extend radially inward at an angle from the outer periphery of the cylindrical body 12 to the axial bore 14. In this alternative embodiment of the present invention, the pressurized flushing fluid is introduced directly into each of the plurality of angled slots 16.
Referring to Figure 3, each of the plurality of inlet ports 20 extends radially inward from the inlet port groove 26 in the outer periphery of the cylindrical body 12 to the axial bore 14 at an angle of approximately 25 degrees relative to the longitudinal axis of the pump bushing 10. Those of ordinary skill in the art will readily appreciate that this dimension may be modified without departing from the spirit or scope of the present invention. The orientation of the angled slots 16 and each of the plurality of inlet ports 20 is adapted and configured to impart a rotational component of motion to the pressurized flushing fluid. This rotational component of motion aids in the axial movement of debris and its removal from the seal cavity of the pump.
Referring to Figures 6 through 11, in another embodiment of the present invention, a pump bushing 100 includes a cylindrical body 112 including two hemi~cylindrical portions 112a and 112b (see Figures 7 and 9) that are secured together by dowel pins (see Figure 8).
This configuration enables the pump bushing 100 to be installed in and/or removed from a pump, such as a centrifugal pump or a rotary pump, relatively easily.
Preferably, the cylindrical body 112 has an axial bore 114 extending therethrough for accommodating an impeller shaft of the pump. As illustrated in Figure 11, the pump bushing 100 includes a plurality of angled slots 116 that extend from an inlet port groove 126 to the axial bore 114, and terminate in an annular discharge groove 122 at the front end of the pump bushing 100.
The pump bushing 10, 100 of the present invention may have an overall length of approximately 1 to 4 inches (preferably 1-1/8 to 3-7/8 inches), an outside diameter (OD) of approximately 1 to 13 inches (preferably 2 to 12-1/16 inches), an axial bore diameter of approximately 1 to 11 inches (preferably 1-3/8 to 10-9/16 inches), an inlet port diameter of approximately 1 to 12 inches (preferably 1-11/16 to 11-5/16 inches), and an inlet port width of approximately 1/4 to 2 inches (preferably 3/8 to 1-15/16 inches). The counter axial bore diameter is approximately equal to the impeller shaft diameter plus 3/8 inches. The counter axial bore depth is approximately 3/8 inches. The inlet port groove dimension is approximately 3/8 inches minimum with, for example, a radial depth of 1/8 inches.
Preferably, the pump bushing 10, 100 is made of carbon graphite filled polytetrafluoroethylene (PTFE) or any other suitable material, including both metallic and non-metallic materials.
Although the pump bushing device and associated methods of the present invention have been illustrated and described with reference to preferred embodiments and examples thereof, other embodiments and examples may achieve the same results and/or perform similar functions. Accordingly, changes in and modifications to the pump bushing device and associated methods of the present invention will be apparent to those of ordinary skill in the art without departing from the spirit or scope of the present invention.
The following claims are intended to cover all such equivalent embodiments and examples.
Figure 4 is a front end view of the pump bushing of Figure 1;
Figure 5 is a cross-sectional view of the pump bushing of Figure 2 taken along line 5-S;
Figure 6 is a perspective view of another embodiment of a pump bushing adapted and configured to admit pressurized flushing fluid into a seal cavity of a pump, flushing debris therefrom without removal of the pump bushing;
Figure 7 is a side elevation view of one half of a cylindrical body of the pump bushing of Figure 6;
Figure 8 is a cross-sectional view of the pump bushing ofFigure 7 taken along line C-C;
Figure 9 is a side elevation view of another half of the cylindrical body of the pump bushing of Figure 6;
Figure 10 is a front end view of the pump bushing of Figure 6; and Figure 11 is a partial cross-sectional view of the pump bushing of Figure 9 taken along line D-D.
Detailed Description of the Invention Refernng now to the drawings, wherein like reference numerals identify like structural elements and features of the pump bushing of the present invention, there is illustrated in Figure 1 one embodiment of a pump bushing adapted and configured to admit pressurized flushing fluid into a seal cavity of a pump, flushing debris therefrom without removal of the pump bushing. The pump bushing is designated generally by reference numeral 10 herein.
Refernng to Figure 1, in one embodiment of the present invention, the pump bushing 10 includes a cylindrical body 12 including two hemi-cylindrical portions 12a and 12b that are secured together by, for example, threaded fasteners or dowel pins (see Figure S). This configuration enables the pump bushing 10 to be installed in and/or removed from a pump (not shown), such as a centrifugal pump or a rotary pump, relatively easily.
Preferably, the cylindrical body 12 has an axial bore 14 extending therethrough for accommodating an impeller shaft (not shown) of the pump.
Referring to Figures 2 and 3, a plurality of circumferentially spaced-apart, axially-extending, angled slots 16 or troughs are defined in an inner peripheral v~all 18 of the axial bore 14. For example, as illustrated in Figure 4, the centerline of each of the plurality of angled slots 16 varies or tapers approximately 0.219 inches from beginning to end. Those of ordinary skill in the art will readily appreciate that this dimension may be modified without departing from the spirit or scope of the present invention. Preferably, the angled slots 16 are radially tapered, i.e. the angled slots 16 become shallower as they approach the end of the axial bore 14. The angled slots 16 receive pressurized flushing fluid through a plurality of corresponding circumferentially spaced-apart inlet ports 20 or apertures that extend radially inward at an angle from the outer periphery of the cylindrical body 12 to the axial bore 14.
The angled slots 16 extend from the inlet ports 20 to a common annular discharge groove 22 formed at the end of the axial bore 14 (see Figure 1). This angular orientation of the slots 16 and the inlet ports 20 imparts rotation to the pressurized flushing fluid, aiding in the removal of debris from a seal cavity of the pump.
In an alternative embodiment of the present invention, each of the plurality of angled slots 16 extends directly from an inlet port groove 26 to the axial bore 14.
Thus, in this configuration, there are no corresponding circumferentially spaced,apart inlet ports 20 or apertures that extend radially inward at an angle from the outer periphery of the cylindrical body 12 to the axial bore 14. In this alternative embodiment of the present invention, the pressurized flushing fluid is introduced directly into each of the plurality of angled slots 16.
Referring to Figure 3, each of the plurality of inlet ports 20 extends radially inward from the inlet port groove 26 in the outer periphery of the cylindrical body 12 to the axial bore 14 at an angle of approximately 25 degrees relative to the longitudinal axis of the pump bushing 10. Those of ordinary skill in the art will readily appreciate that this dimension may be modified without departing from the spirit or scope of the present invention. The orientation of the angled slots 16 and each of the plurality of inlet ports 20 is adapted and configured to impart a rotational component of motion to the pressurized flushing fluid. This rotational component of motion aids in the axial movement of debris and its removal from the seal cavity of the pump.
Referring to Figures 6 through 11, in another embodiment of the present invention, a pump bushing 100 includes a cylindrical body 112 including two hemi~cylindrical portions 112a and 112b (see Figures 7 and 9) that are secured together by dowel pins (see Figure 8).
This configuration enables the pump bushing 100 to be installed in and/or removed from a pump, such as a centrifugal pump or a rotary pump, relatively easily.
Preferably, the cylindrical body 112 has an axial bore 114 extending therethrough for accommodating an impeller shaft of the pump. As illustrated in Figure 11, the pump bushing 100 includes a plurality of angled slots 116 that extend from an inlet port groove 126 to the axial bore 114, and terminate in an annular discharge groove 122 at the front end of the pump bushing 100.
The pump bushing 10, 100 of the present invention may have an overall length of approximately 1 to 4 inches (preferably 1-1/8 to 3-7/8 inches), an outside diameter (OD) of approximately 1 to 13 inches (preferably 2 to 12-1/16 inches), an axial bore diameter of approximately 1 to 11 inches (preferably 1-3/8 to 10-9/16 inches), an inlet port diameter of approximately 1 to 12 inches (preferably 1-11/16 to 11-5/16 inches), and an inlet port width of approximately 1/4 to 2 inches (preferably 3/8 to 1-15/16 inches). The counter axial bore diameter is approximately equal to the impeller shaft diameter plus 3/8 inches. The counter axial bore depth is approximately 3/8 inches. The inlet port groove dimension is approximately 3/8 inches minimum with, for example, a radial depth of 1/8 inches.
Preferably, the pump bushing 10, 100 is made of carbon graphite filled polytetrafluoroethylene (PTFE) or any other suitable material, including both metallic and non-metallic materials.
Although the pump bushing device and associated methods of the present invention have been illustrated and described with reference to preferred embodiments and examples thereof, other embodiments and examples may achieve the same results and/or perform similar functions. Accordingly, changes in and modifications to the pump bushing device and associated methods of the present invention will be apparent to those of ordinary skill in the art without departing from the spirit or scope of the present invention.
The following claims are intended to cover all such equivalent embodiments and examples.
Claims (20)
1. A pump bushing device that is adapted and configured to admit pressurized flushing fluid into a seal cavity of a pump, flushing debris therefrom without removal of the pump bushing device, the pump bushing device comprising:
a cylindrical body defining an axial bore extending therethrough for accommodating a shaft of a pump;
a plurality of circumferentially spaced-apart, axially-extending, angled slots formed in an inner peripheral wall of the axial bore;
a plurality of apertures corresponding to the plurality of angled slots, the plurality of apertures extending radially inward at an angle from the outer periphery of the cylindrical body to the axial bore; and wherein the plurality of angled slots and the plurality of apertures receive pressurized flushing fluid.
a cylindrical body defining an axial bore extending therethrough for accommodating a shaft of a pump;
a plurality of circumferentially spaced-apart, axially-extending, angled slots formed in an inner peripheral wall of the axial bore;
a plurality of apertures corresponding to the plurality of angled slots, the plurality of apertures extending radially inward at an angle from the outer periphery of the cylindrical body to the axial bore; and wherein the plurality of angled slots and the plurality of apertures receive pressurized flushing fluid.
2. The pump bushing device of Claim 1, wherein the cylindrical body comprises two hemi-cylindrical portions.
3. The pump bushing device of Claim 2, wherein the two hemi-cylindrical portions are secured together by a plurality of fasteners.
4. The pump bushing device of Claim 3, wherein the plurality of fasteners comprise a plurality of fasteners selected from the group consisting of threaded fasteners and dowel pins.
5. The pump bushing device of Claim 1, wherein a plurality of inlet ports are in communication with an inlet port groove.
6. The pump bushing device of Claim 1, further comprising an annular discharge groove formed in the cylindrical body at an end of the axial bore.
7. The pump bushing device of Claim 1, wherein the pump bushing device comprises a rotary pump bushing device.
8. The pump bushing device of Claim 1, wherein the pump bushing device comprises a material selected from the group consisting of polytetrafluoroethylene (PTFE), a metallic material, and a non-metallic material.
9. The pump bushing device of Claim 1, wherein the pump comprises a centrifugal pump.
10. The pump bushing device of Claim 1, wherein the shaft comprises an impeller shaft.
11. A method for admitting pressurized flushing fluid into a seal cavity of a pump, flushing debris therefrom without removal of a pump bushing device, the method comprising:
providing a cylindrical body defining an axial bore extending therethrough for accommodating a shaft of a pump;
providing a plurality of circumferentially spaced-apart, axially-extending, angled slots formed in an inner peripheral wall of the axial bore;
providing a plurality of apertures corresponding to the plurality of angled slots, the plurality of apertures extending radially inward at an angle from the outer periphery of the cylindrical body to the axial bore; and wherein the plurality of angled slots and the plurality of apertures receive pressurized flushing fluid.
providing a cylindrical body defining an axial bore extending therethrough for accommodating a shaft of a pump;
providing a plurality of circumferentially spaced-apart, axially-extending, angled slots formed in an inner peripheral wall of the axial bore;
providing a plurality of apertures corresponding to the plurality of angled slots, the plurality of apertures extending radially inward at an angle from the outer periphery of the cylindrical body to the axial bore; and wherein the plurality of angled slots and the plurality of apertures receive pressurized flushing fluid.
12. The method of Claim 11, wherein the cylindrical body comprises two hemi-cylindrical portions.
13. The method of Claim 12, wherein the two hemi-cylindrical portions are secured together by a plurality of fasteners.
14. The method of Claim 13, wherein the plurality of fasteners comprise a plurality of fasteners selected from the group consisting of threaded fasteners and dowel pins.
15. The method of Claim 11, wherein a plurality of inlet ports are in communication with an inlet port groove.
16. The method of Claim 11, further comprising providing an annular discharge groove formed in the cylindrical body at an end of the axial bore.
17. The method of Claim 11, wherein the pump bushing device comprises a rotary pump bushing device.
18. The method of Claim 11, wherein the pump bushing device comprises a material selected from the group consisting of polytetrafluoroethylene (PTFE), a metallic material, and a non-metallic material.
19. The method of Claim 11, wherein the pump comprises a centrifugal pump.
20. The method of Claim 11, wherein the shaft comprises an impeller shaft.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US29797101P | 2001-06-13 | 2001-06-13 | |
| US60/297,971 | 2001-06-13 | ||
| PCT/US2002/018937 WO2002101243A2 (en) | 2001-06-13 | 2002-06-13 | Pump bushing device and associated methods |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2447872A1 true CA2447872A1 (en) | 2002-12-19 |
Family
ID=23148460
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002447872A Abandoned CA2447872A1 (en) | 2001-06-13 | 2002-06-13 | Pump bushing device and associated methods |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20030026718A1 (en) |
| AU (1) | AU2002306166A1 (en) |
| CA (1) | CA2447872A1 (en) |
| WO (1) | WO2002101243A2 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017190250A1 (en) * | 2016-05-06 | 2017-11-09 | Optimal Pump Solutions Inc. | Bushing for rotary fluid pumping equipment |
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| US6834862B2 (en) * | 2002-01-23 | 2004-12-28 | Mark R. Wilkinson | Shaft sealing system for a rotary mechanical device |
| EP1996817A4 (en) * | 2005-11-28 | 2011-07-06 | Cadtech Innovations | Bushing and lantern ring for rotary fluid pumping equipment |
| US20070170657A1 (en) * | 2006-01-20 | 2007-07-26 | Wilkinson Mark R | Stuffing box bushing, assembly and method of manufacture |
| GB0609115D0 (en) * | 2006-05-09 | 2006-06-21 | Aes Eng Ltd | Seal Cavity Protection |
| US9181956B2 (en) * | 2010-12-21 | 2015-11-10 | Hamilton Sundstrand Corporation | Seal shaft for controlling fluid flow within an air cycle machine |
| US9470104B2 (en) * | 2013-01-31 | 2016-10-18 | Hamilton Sundstrand Corporation | Air cycle machine with seal shaft |
| GB2515998B (en) * | 2013-05-01 | 2015-11-18 | Aes Eng Ltd | PFR bushing |
| USD824967S1 (en) | 2015-11-09 | 2018-08-07 | Seal Ryt Corporation | Bearing with integral diverted lantern ring for a rotary mechanical device |
| US10072758B2 (en) | 2015-11-09 | 2018-09-11 | Seal Ryt Corporation | Stuffing box body with integral diverted lantern ring |
| US10393272B2 (en) * | 2015-11-24 | 2019-08-27 | Kaydon Ring & Seal, Inc. | Sleeve configured for use in a non-contacting gas seal and gas seal including the sleeve |
| USD888788S1 (en) * | 2017-06-07 | 2020-06-30 | Us Synthetic Corporation | Radial bearing |
| CA3064424C (en) | 2017-06-07 | 2022-03-29 | Us Synthetic Corporation | Bearing assemblies, related bearing apparatuses, and related methods |
| USD888787S1 (en) * | 2017-06-07 | 2020-06-30 | Us Synthetic Corporation | Radial bearing |
| US11054036B2 (en) | 2018-09-27 | 2021-07-06 | Seal-Ryt Corp. | Pillar lantern ring for a shaft sealing system |
| EP3792527A1 (en) * | 2019-09-10 | 2021-03-17 | Alfa Laval Corporate AB | Gasket, fluid flow control valve and method of cleaning such a valve |
| USD944876S1 (en) * | 2020-03-05 | 2022-03-01 | Seal-Ryt Corp. | Extractable cylindrical sealing element |
| USD944875S1 (en) * | 2020-03-05 | 2022-03-01 | Seal-Ryt Corp. | Extractable cylindrical sealing element with lantern ring |
| US11073212B1 (en) * | 2020-12-03 | 2021-07-27 | John A. Kozel | Packing cartridge and method of installation |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4456266A (en) * | 1981-12-14 | 1984-06-26 | General Electric Company | Throttle bushing |
| US4878676A (en) * | 1987-09-18 | 1989-11-07 | Chaldar, Inc. | Seal-flushing in centrifugal-pumps, improved methods and apparatuses |
| US5184945A (en) * | 1991-12-27 | 1993-02-09 | Assoma, Inc. | Bushing structure for using in magnetically driving centrifugal pumps |
| US5213468A (en) * | 1992-02-24 | 1993-05-25 | Fairbanks Morse Pump Corporation | Bearing flushing system |
| US5195867A (en) * | 1992-03-05 | 1993-03-23 | Barrett, Haentjens & Co. | Slurry pump shaft seal flushing |
| US6079942A (en) * | 1998-05-19 | 2000-06-27 | Simpson Industries, Inc. | Pump seal flushing ring |
| US6099243A (en) * | 1999-01-29 | 2000-08-08 | Caterpillar Inc. | Centrifugal pump with seal cooling and debris flushing arrangement |
| US6443715B1 (en) * | 1999-11-19 | 2002-09-03 | Campbell Hausfeld/Scott Fetzer Company | Pump impeller |
-
2002
- 2002-06-13 WO PCT/US2002/018937 patent/WO2002101243A2/en active Application Filing
- 2002-06-13 CA CA002447872A patent/CA2447872A1/en not_active Abandoned
- 2002-06-13 US US10/170,557 patent/US20030026718A1/en not_active Abandoned
- 2002-06-13 AU AU2002306166A patent/AU2002306166A1/en not_active Abandoned
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017190250A1 (en) * | 2016-05-06 | 2017-11-09 | Optimal Pump Solutions Inc. | Bushing for rotary fluid pumping equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2002101243A3 (en) | 2003-03-20 |
| WO2002101243A2 (en) | 2002-12-19 |
| US20030026718A1 (en) | 2003-02-06 |
| AU2002306166A1 (en) | 2002-12-23 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| FZDE | Discontinued |