US20190323490A1 - Pumping assembly - Google Patents
Pumping assembly Download PDFInfo
- Publication number
- US20190323490A1 US20190323490A1 US15/961,306 US201815961306A US2019323490A1 US 20190323490 A1 US20190323490 A1 US 20190323490A1 US 201815961306 A US201815961306 A US 201815961306A US 2019323490 A1 US2019323490 A1 US 2019323490A1
- Authority
- US
- United States
- Prior art keywords
- pump
- port
- pumping assembly
- end cap
- assembly
- 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
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B23/00—Pumping installations or systems
- F04B23/04—Combinations of two or more pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
- F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B23/00—Pumping installations or systems
- F04B23/04—Combinations of two or more pumps
- F04B23/06—Combinations of two or more pumps the pumps being all of reciprocating positive-displacement type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/16—Casings; Cylinders; Cylinder liners or heads; Fluid connections
Definitions
- This invention is directed toward a pumping assembly. More specifically, and without limitation, this invention relates to a hydrostatic pumping assembly with a two pump assembly having only two ports.
- Pumping assemblies are well known in the art.
- One problem with current pumping assemblies relates to providing larger displacements.
- Larger displacement requires increasing the size of components and elements related to force considerations, such as shafts, bearings, and rotating kits.
- those pumping assemblies that do have larger displacements are difficult to manufacture and distribute due to the cost of production and retail cost for such pumping assemblies.
- the pumps are controlled independently and function as separate or individual pumps irrespective of the presence of the other pump. This further complicates operation of such a pumping assembly.
- Another objective of this invention is to provide a pumping assembly that allows the incorporation of existing qualified components.
- Yet another objective of this invention is to provide a pumping assembly with a larger displacement.
- Another objective of this invention is to provide a pumping assembly with two pumps and simplified plumbing.
- Yet another objective of this invention is to provide a pumping assembly that reduces redundant elements.
- the present invention relates to a pump assembly.
- the pump assembly includes a first pump and a second pump that are connected to an end cap that has only a first port and a second port.
- This arrangement allows the use of pumps that have been previously designed and qualified to be combined to provide a larger displacement substantially the same as their combined displacement.
- the use of smaller pumps to achieve a larger displacement rather than a single larger pump having the same displacement allows for superior performance associated with smaller parts.
- the ability to use existing pumps reduces time and costs dedicated to design and development.
- Sharing the first port and the second port shortens the related plumbing while eliminating components that are needed when separate pumps are used. Similarly, the shared ports allows for the pump to operate in tandem, which improves performance.
- the pumps are variable displacement pumps.
- the use of variable displacement pumps provide a range of displacements, including those available from each individual pump and the combination of pumps.
- FIG. 1 is a cut-away side view of a pumping assembly
- FIG. 2 is a side view of a pumping assembly
- FIG. 3 is a schematic view of a pumping assembly.
- a pumping assembly 10 having a first pump 12 and a second pump 14 connected to an end cap 16 .
- the first pump 12 and the second pump 14 are hydrostatic variable displacement pumps that are configured to operate independently of each other or in combination.
- the first pump 12 is a 210 cc/rev pump and the second pump 14 is a 210 cc/rev pump, which provide a combined 420 cc/rev.
- the end cap 16 has a first side 18 and a second side 20 with a core 22 therebetween that is shared by the first pump 12 and the second pump 14 .
- the end cap 16 is centrally located with the first pump 12 and the second pump 14 connected in an end-to-end fashion such that the first pump 12 and the second pump 14 substantially mirror each other.
- a conduit 24 is in liquid communication with the first pump 12 and the second pump 14 is in liquid communication with the core 22 . In this way the flow from the first pump 12 and the second pump 14 flows from the respective pump 12 , 14 to the core 22 .
- the core 22 is in liquid communication with a first port 26 and a second port 28 that extend through to the core 22 from a third side 30 of the end cap 16 .
- the first port 26 is on the third side 30 and the second port 28 is on a fourth side 32 of the end cap 16 .
- the first port 26 and the second port 28 are the only ports on the pumping assembly 10 , which are both in communication with the first pump 12 and the second pump 14 .
- first pump 12 , second pump 14 , and the end cap 16 share a housing 34 providing a one-piece pump assembly 10 .
- first pump 12 and second pump 14 have their own independent housing that connects to the end cap 16 , which provides a three-piece pump assembly 10 .
- the first pump 12 and second pump 14 each have a control system 36 , a bearing 38 , a shaft 40 , a rotating kit 42 , a valve plate 44 , a swashplate 46 , a servo 48 , and one or more valves 50 . In other embodiments, some or all of these elements are shared. As seen in the Figures, the pump assembly 10 has a shared shaft 40 .
- the first pump 12 and the second pump 14 receive a flow from the first port 26 that is pumped in tandem by the first pump 12 and the second pump 14 through the conduit 24 and into the core 22 . From the core 22 a combined flow that has a cc/rev that is substantially equal to the combined cc/rev of the first pump 12 and the second pump passes out the second port 28 .
- the control system 36 is shared, the first pump 12 and second pump 14 are controlled together.
- the first pump 12 and the second pump 14 are capable of separate control, including when the first pump 12 and the second pump 14 have variable displacement, which allows for a greater range in selective displacement.
- a pumping assembly 10 that allows the incorporation of existing qualified components, has a larger combined displacement than the pumps, simplifies plumbing, reduces redundant elements, and improves upon the art.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
- This invention is directed toward a pumping assembly. More specifically, and without limitation, this invention relates to a hydrostatic pumping assembly with a two pump assembly having only two ports.
- Pumping assemblies are well known in the art. One problem with current pumping assemblies relates to providing larger displacements. Larger displacement requires increasing the size of components and elements related to force considerations, such as shafts, bearings, and rotating kits. The increase in size, and the associated costs, limits the ability to design larger displacement pumping assemblies. Likewise, those pumping assemblies that do have larger displacements are difficult to manufacture and distribute due to the cost of production and retail cost for such pumping assemblies.
- The use of larger displacement pump assemblies are also slower compared to smaller pump assemblies because of the large components present in the larger displacement pump assemblies. So although a greater displacement is reached, the pump is not as fast.
- This in turn has led to end-consumers attempting to combine the plumbing of two smaller displacement pumping assemblies to provide a larger displacement, which can be less expensive than a larger displacement pumping assembly. However, this approach also has its deficiencies. The combination of two pumping assemblies in this manner causes unnecessary duplication of elements that provide for additional points of failure and inhibits proper flow of the combined pumping assembly thereby decreasing efficiency. These redundancies also increase costs along with the costs related to additional hoses and fittings used to plumb the pumps together. Additional plumbing also extends the length of the system.
- When two pumps are used to provide a greater displacement, the pumps are controlled independently and function as separate or individual pumps irrespective of the presence of the other pump. This further complicates operation of such a pumping assembly.
- Thus it is a primary objective of this invention to provide a pumping assembly that improves upon the art.
- Another objective of this invention is to provide a pumping assembly that allows the incorporation of existing qualified components.
- Yet another objective of this invention is to provide a pumping assembly with a larger displacement.
- Another objective of this invention is to provide a pumping assembly with two pumps and simplified plumbing.
- Yet another objective of this invention is to provide a pumping assembly that reduces redundant elements.
- These and other objectives, features, and advantages of the invention will become apparent from the specification and claims.
- In general, the present invention relates to a pump assembly. The pump assembly includes a first pump and a second pump that are connected to an end cap that has only a first port and a second port. This arrangement allows the use of pumps that have been previously designed and qualified to be combined to provide a larger displacement substantially the same as their combined displacement. The use of smaller pumps to achieve a larger displacement rather than a single larger pump having the same displacement allows for superior performance associated with smaller parts. Similarly, the ability to use existing pumps reduces time and costs dedicated to design and development.
- Sharing the first port and the second port shortens the related plumbing while eliminating components that are needed when separate pumps are used. Similarly, the shared ports allows for the pump to operate in tandem, which improves performance.
- In some arrangements of the present invention, the pumps are variable displacement pumps. The use of variable displacement pumps provide a range of displacements, including those available from each individual pump and the combination of pumps.
-
FIG. 1 is a cut-away side view of a pumping assembly; -
FIG. 2 is a side view of a pumping assembly; and -
FIG. 3 is a schematic view of a pumping assembly. - With reference to the Figures a
pumping assembly 10 is shown having afirst pump 12 and asecond pump 14 connected to anend cap 16. Thefirst pump 12 and thesecond pump 14 are hydrostatic variable displacement pumps that are configured to operate independently of each other or in combination. For example, thefirst pump 12 is a 210 cc/rev pump and thesecond pump 14 is a 210 cc/rev pump, which provide a combined 420 cc/rev. - The
end cap 16 has afirst side 18 and asecond side 20 with acore 22 therebetween that is shared by thefirst pump 12 and thesecond pump 14. In the arrangement shown, theend cap 16 is centrally located with thefirst pump 12 and thesecond pump 14 connected in an end-to-end fashion such that thefirst pump 12 and thesecond pump 14 substantially mirror each other. - A
conduit 24 is in liquid communication with thefirst pump 12 and thesecond pump 14 is in liquid communication with thecore 22. In this way the flow from thefirst pump 12 and thesecond pump 14 flows from therespective pump core 22. Thecore 22 is in liquid communication with afirst port 26 and asecond port 28 that extend through to thecore 22 from athird side 30 of theend cap 16. In other arrangements, thefirst port 26 is on thethird side 30 and thesecond port 28 is on afourth side 32 of theend cap 16. Thefirst port 26 and thesecond port 28 are the only ports on thepumping assembly 10, which are both in communication with thefirst pump 12 and thesecond pump 14. - In the exemplary embodiment shown in the Figures, the
first pump 12,second pump 14, and theend cap 16 share a housing 34 providing a one-piece pump assembly 10. In other arrangements, thefirst pump 12 andsecond pump 14 have their own independent housing that connects to theend cap 16, which provides a three-piece pump assembly 10. - In some embodiments, the
first pump 12 andsecond pump 14 each have acontrol system 36, abearing 38, ashaft 40, a rotatingkit 42, avalve plate 44, aswashplate 46, aservo 48, and one ormore valves 50. In other embodiments, some or all of these elements are shared. As seen in the Figures, thepump assembly 10 has a sharedshaft 40. - In operation, the
first pump 12 and thesecond pump 14 receive a flow from thefirst port 26 that is pumped in tandem by thefirst pump 12 and thesecond pump 14 through theconduit 24 and into thecore 22. From the core 22 a combined flow that has a cc/rev that is substantially equal to the combined cc/rev of thefirst pump 12 and the second pump passes out thesecond port 28. When thecontrol system 36 is shared, thefirst pump 12 andsecond pump 14 are controlled together. In other arrangements, thefirst pump 12 and thesecond pump 14 are capable of separate control, including when thefirst pump 12 and thesecond pump 14 have variable displacement, which allows for a greater range in selective displacement. - Therefore, a
pumping assembly 10 has been provided that allows the incorporation of existing qualified components, has a larger combined displacement than the pumps, simplifies plumbing, reduces redundant elements, and improves upon the art. - From the above discussion and accompanying figures and claims, it will be appreciated that the
pumping assembly 10 offers many advantages over the prior art. It will be appreciated further by those skilled in the art that other various modifications could be made to the device without parting from the spirit and scope of this invention. All such modifications and changes fall within the scope of the claims and are intended to be covered thereby. It should be understood that the examples and embodiments described herein are for illustrative purposes only and that various modifications or changes in the light thereof will be suggested to persons skilled in the art and are to be included in the spirit and purview of this application.
Claims (12)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US15/961,306 US20190323490A1 (en) | 2018-04-24 | 2018-04-24 | Pumping assembly |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US15/961,306 US20190323490A1 (en) | 2018-04-24 | 2018-04-24 | Pumping assembly |
Publications (1)
Publication Number | Publication Date |
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US20190323490A1 true US20190323490A1 (en) | 2019-10-24 |
Family
ID=68236826
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US15/961,306 Abandoned US20190323490A1 (en) | 2018-04-24 | 2018-04-24 | Pumping assembly |
Country Status (1)
Country | Link |
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US (1) | US20190323490A1 (en) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3643434A (en) * | 1969-07-23 | 1972-02-22 | Bosch Gmbh Robert | Hydraulic apparatus with axially aligned hydraulic units |
US5540563A (en) * | 1994-09-16 | 1996-07-30 | Sauer Inc. | Unitary housing for double hydraulic unit |
US8820067B2 (en) * | 2010-11-25 | 2014-09-02 | Technoboost | Variable displacement hydraulic machine, in particular for a motor vehicle |
-
2018
- 2018-04-24 US US15/961,306 patent/US20190323490A1/en not_active Abandoned
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3643434A (en) * | 1969-07-23 | 1972-02-22 | Bosch Gmbh Robert | Hydraulic apparatus with axially aligned hydraulic units |
US5540563A (en) * | 1994-09-16 | 1996-07-30 | Sauer Inc. | Unitary housing for double hydraulic unit |
US8820067B2 (en) * | 2010-11-25 | 2014-09-02 | Technoboost | Variable displacement hydraulic machine, in particular for a motor vehicle |
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Owner name: DANFOSS POWER SOLUTIONS INC., IOWA Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:CRONBAUGH, JOSHUA;REEL/FRAME:045624/0427 Effective date: 20180416 |
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