US20170159669A1 - Impeller, And Pump And Fluid Delivery Device Using The Impeller - Google Patents
Impeller, And Pump And Fluid Delivery Device Using The Impeller Download PDFInfo
- Publication number
- US20170159669A1 US20170159669A1 US15/369,126 US201615369126A US2017159669A1 US 20170159669 A1 US20170159669 A1 US 20170159669A1 US 201615369126 A US201615369126 A US 201615369126A US 2017159669 A1 US2017159669 A1 US 2017159669A1
- Authority
- US
- United States
- Prior art keywords
- base plate
- impeller
- blades
- pump
- equal
- 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
- 239000012530 fluid Substances 0.000 title claims abstract description 28
- 210000000078 claw Anatomy 0.000 claims description 9
- 230000007704 transition Effects 0.000 claims description 4
- 230000000717 retained effect Effects 0.000 claims description 2
- 239000007788 liquid Substances 0.000 description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
Images
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
- F04D29/18—Rotors
- F04D29/22—Rotors specially for centrifugal pumps
- F04D29/2205—Conventional flow pattern
- F04D29/2216—Shape, geometry
-
- 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
- F04D29/18—Rotors
- F04D29/22—Rotors specially for centrifugal pumps
- F04D29/24—Vanes
- F04D29/242—Geometry, shape
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D13/00—Pumping installations or systems
- F04D13/02—Units comprising pumps and their driving means
- F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D13/00—Pumping installations or systems
- F04D13/02—Units comprising pumps and their driving means
- F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
- F04D13/0606—Canned motor pumps
-
- 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
- F04D29/18—Rotors
- F04D29/22—Rotors specially for centrifugal pumps
- F04D29/2205—Conventional flow pattern
-
- 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
- F04D29/18—Rotors
- F04D29/22—Rotors specially for centrifugal pumps
- F04D29/2205—Conventional flow pattern
- F04D29/2222—Construction and assembly
-
- 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
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/426—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps
- F04D29/4293—Details of fluid inlet or outlet
Definitions
- This invention relates to an impeller, and in particular, to a centrifugal impeller and a pump and a fluid delivery device using the impeller.
- a centrifugal pump usually includes a motor which drives an impeller to rotate.
- a pump housing and a suction pipe are filled with liquid.
- the impeller rotates at high speed, the impeller drives the liquid between blades to rotate therewith.
- the centrifugal force the liquid is thrown from a center of the impeller to an outer edge of the impeller, and its kinetic energy is increased accordingly.
- the liquid enters a pump casing, because a flow passage in the volute pump casing expands progressively, the speed of the flow progressively decreases. As a result, part of the kinetic energy is converted into static pressure energy, such that the liquid is discharged from an outlet with high pressure.
- the impeller of the conventional pump includes an base plate and straight blades disposed on the base plate.
- the blades are usually uniformly distributed on the impeller.
- such a centrifugal pump has poor liquid delivery efficiency.
- An impeller includes an base plate, a plurality of long blades and a plurality of short blades disposed on the base plate.
- the impeller further includes a shaft mounting portion disposed on the base plate.
- the plurality of long blades and the plurality of short blades are alternatively arranged on the base plate and surround the shaft mounting portion.
- the long blades and the short blades are all arcuate blades.
- the shaft mounting portion is a circular cylinder protruding from the base plate.
- the long blade extend along radial directions of the base plate, each long blade has a terminating end adjacent to the radial rim of the base plate and a start end of each long blade relatively closed to the shaft mounting portion comparing to the terminating end of the long blade, a ratio of a distance between a start end of each long blade and an outer circumferential surface of the shaft mounting portion, to a diameter of the base plate is greater than or equal to 0.219, and less than or equal to 0.4;
- a ratio of a distance between a start position of each of the short blades and the start position of one adjacent long blade, to the diameter of the base plate is greater than or equal to 0.219, and less than or equal to 0.4.
- the long blades are spaced from each other at uniform intervals
- the short blades are spaced from each other at uniform intervals
- distances between a start end of each short blade and start ends of two long blades neighboring the short blade are the same;
- the base plate defines a plurality of balance holes in the base plate.
- the balance holes uniformly distributed on the base plate.
- centers of the balance holes are located on a same circle, and a ratio of a diameter of the circle to a diameter of the base plate is greater than or equal to 0.36, and less than or equal to 0.9;
- a cross section area of each balance hole is greater than or equal to 9 mm 2 , and less than or equal to 240 mm 2 ;
- each balance hole has at least one of the following shapes: round, square, triangle, and rectangle.
- the shaft mounting portion is connected to the base plate with a smooth transition therebetween.
- a pump includes a driving mechanism and an impeller in accordance with any one as described above.
- the impeller is connected to the driving mechanism, and the driving mechanism is configured to drive the impeller to rotate.
- the pump further includes a pump housing, the pump housing includes a main body and a cover disposed on the main body, the main body includes a volute-shaped receiving portion and a flow guide portion ( 343 ) connected to the receiving portion, the driving mechanism is mounted to the cover, and the receiving portion defines a receiving chamber accommodating the impeller.
- the pump housing includes a main body and a cover disposed on the main body, the main body includes a volute-shaped receiving portion and a flow guide portion ( 343 ) connected to the receiving portion, the driving mechanism is mounted to the cover, and the receiving portion defines a receiving chamber accommodating the impeller.
- the profile of the receiving chamber of the receiving portion is a spiral line substantially formed by a plurality of arc segments approximated, a ratio of a diameter D 1 to a diameter D 2 is greater than or equal to 1.05, and less than or equal to 1.1, wherein D 1 is a diameter of one of the arc segments, at which the starting point of the spiral line is located, D 2 is a diameter of the base plate;
- a ratio of an outlet flow area of the receiving portion to an outlet flow area of the impeller is greater than or equal to 0.2, and less than or equal to 0.5;
- a ratio of a distance between the impeller and a bottom wall of the receiving portion of the main body to the diameter of the base plate is greater than or equal to 0.04, and less than or equal to 0.12.
- the flow guide portion defines an outlet passage communicating with the receiving chamber of the receiving portion, and a diameter of the outlet passage increases progressively in a direction away from the receiving portion; and/or, the pump further includes an inlet pipe, the inlet pipe is disposed at one side of the receiving portion opposite from the cover, and an inner chamber of the inlet pipe is in communication with the receiving chamber of the receiving portion.
- the cover includes a mounting portion and a cover portion disposed on the mounting portion, the cover portion covers on the main body, and the driving mechanism is mounted in the mounting portion.
- the pump further comprises a mounting base , and the mounting portion of the cover is fixedly disposed on the mounting base.
- the mounting base includes a base body and a retaining portion disposed on the base body, the retaining portion includes two opposed claws, and the mounting portion is retained between the two claws.
- the driving mechanism is a single phase motor.
- the impeller includes the alternatively arranged long and short arcuate blades, which further optimizes the design of the flow passage in the pump housing, thereby resulting in more smooth and stable flow of the fluid and enhanced fluid delivery efficiency.
- FIG. 1 is a perspective view of a pump according to one embodiment of the present invention.
- FIG. 2 is a perspective, exploded view of the pump of FIG. 1 .
- FIG. 3 is a perspective, exploded view of the pump of FIG. 1 , viewed from another aspect.
- FIG. 4 is a sectional view of a pump housing of the pump of FIG. 1 , taken along line IV-IV thereof
- FIG. 5 is a perspective view of an impeller of the pump of FIG. 2 .
- FIG. 6 is a top plan view of the impeller of the pump of FIG. 5 .
- FIG. 7 is a cross sectional view of the pump of FIG. 1 , taken along line VII-VII thereof.
- a component when a component is described to be “fixed” to another component, it can be directly fixed to the another component or there may be an intermediate component.
- a component when a component is described to be “connected” to another component, it can be directly connected to the another component or there may be an intermediate component.
- a component When a component is described to be “disposed” on another component, it can be directly disposed on the another component or there may be an intermediate component.
- the directional phraseologies such as “perpendicular” or similar expressions are for the purposes of illustration only.
- a pump 100 in accordance with one embodiment of the present invention is used to draw a liquid such as water or oil so as to deliver the liquid from a container to another container or an outside environment, for example, drain water off a water pool.
- the pump 100 is a centrifugal pump. It should be understood that the pump 100 may also be used to draw and/or drain a fluid such as gas.
- the pump 100 includes a mounting base 10 , a pump housing 30 , a driving mechanism 50 , and an impeller 70 .
- the pump housing 30 is connected to the mounting base 10 , and the driving mechanism 50 and the impeller 70 are received in the pump housing 30 .
- the impeller 70 is disposed on the driving mechanism 50 .
- the driving mechanism 50 is used to drive the impeller 70 to rotate to deliver the liquid from one side of the pump housing 30 to the other side of the pump housing 30 , thus achieving the fluid delivery by the pump.
- the mounting base 10 is generally an irregular block-shaped base body for mounting the pump housing 30 and receiving electric control elements (not shown) for driving the pump 100 to operate.
- the mounting base 10 includes a base body 12 and a retaining portion 14 disposed on the base body 12 .
- the electric control elements are disposed in the base body 12 . It should be understood that, in some other embodiments, the base body 12 may receive another element such as a heat dissipating element.
- the retaining portion 14 is disposed on one side of the base body 12 , which includes two claws 141 .
- the two claws 141 are disposed adjacent each other and spaced apart from each other.
- the two claws 141 are used to retain the pump housing 30 . It should be understood that the number of the claws 141 is not limited to two, which may also be three, four or more.
- the pump housing 30 includes a cover 32 , a main body 34 , and an inlet pipe 36 .
- the cover 32 covers one side of the main body 34
- the inlet pipe 36 is disposed at the other side of the main body 34 .
- the cover 32 includes a mounting portion 321 and a cover portion 323 connected to the mounting portion 321 .
- the mounting portion 321 is generally hollow cylindrical, which is mounted on the retaining portion 14 and located between the two claws 141 .
- the mounting portion 321 is used to receive the driving mechanism 50 .
- the cover portion 323 is disposed at one end of the mounting portion 321 , for covering the main body 34 .
- the main body 34 is disposed on the cover portion 323 , which includes a volute-shaped receiving portion 341 and a flow guide portion 343 connected to a circumferential side of the receiving portion 341 .
- the receiving portion 341 defines a receiving chamber 3411 in communication with an inner chamber of the cover 32 , for receiving the impeller 70 .
- the flow guide portion 343 is generally hollow tubular and defines an outlet passage 3431 along the central axis thereof and communicating with the receiving chamber 3411 , for allowing the fluid such as water, oil or gas to flow therethrough.
- the central axis of the flow guide portion 343 is substantially perpendicular to a central axis of the receiving portion 341 .
- the inlet pipe 36 is generally hollow tubular, which is disposed on one side of the receiving portion 341 away from the cover 32 , with a central axis of the inlet pipe 36 substantially parallel to or coincident with the central axis of the receiving portion 341 .
- a inlet passage 361 is defined in the inlet pipe 36 along the central axis thereof.
- the inlet passage 361 communicates with the receiving chamber 3411 , which provides a passage for allowing the fluid such as water, oil or gas to flow therethrough.
- the main body 34 is volute shaped.
- the profile of the receiving chamber of the receiving portion 341 is a spiral line substantially formed by a plurality of arc segments approximated.
- the plurality of arc segments includes 4 arc segments.
- a diameter of one of the arc segments, at which the starting point of the spiral is located, is denoted by Dl.
- a diameter of the outlet passage 3431 in the flow guide portion 343 progressively increases in a direction away from the receiving chamber 3411 , such that a dynamic head of the fluid out of the receiving portion 341 is converted into a static head, thus ensuring smooth fluid delivery.
- An outlet flow area of the receiving portion 341 which is a cross-sectional area at the joint between the flow guide portion 343 and the receiving portion 341 , is denoted by A 1 .
- the driving mechanism 50 is a rotary motor and, preferably, a single phase motor.
- the driving mechanism 50 is disposed in the mounting portion 321 of the cover 32 , for driving the impeller 70 to rotate.
- the driving mechanism 50 includes a driving body 52 and a driving shaft 54 disposed on the driving body 52 , and the driving body 52 is fixedly disposed in the mounting portion 321 .
- the driving shaft 54 is disposed at one end of the driving body 52 adjacent the main body 34 and extends from within the cover 32 into the receiving chamber 3411 of the main body 34 .
- the driving shaft 54 can rotate, under the driving the driving body 52 , to drive the impeller 70 to rotate.
- the driving mechanism 50 is a single phase brushless motor.
- the single phase brushless motor is capable of directed rotation, under the control of an electronic speed regulator, without additional backstop mechanism disposed in the pump 100 , which improves the operating efficiency and stability of the pump 100 .
- the impeller 70 is mounted on the driving shaft 54 and received in the receiving chamber 3411 .
- the impeller 70 includes an base plate 72 , a shaft mounting portion 74 , long blades 76 , and short blades 78 .
- the shaft mounting portion 74 is disposed substantially at a center of the base plate 72
- the long blades 76 and the short disc 78 are disposed on the base plate 72 .
- the base plate 72 is substantially a circular disc, which is fixedly attached around the driving shaft 54 and is capable of rotation under the driving of the driving shaft 54 .
- a diameter of the base plate 72 which is also a diameter of the base plate 70 , is denoted by D 2 .
- a ratio of the diameter D 1 of the first inner surface arc segment of the receiving portion 341 of the housing 34 to the diameter D 2 of the base plate 72 (the diameter D 2 of the impeller) is denoted by m, where m is equal to or greater than 1.05, and equal to or less than 1.1. That is,
- Balance holes 721 are formed in the base plate 72 .
- the balance holes 721 are through holes passing through the base plate 72 , and the number of the balance holes 721 is three.
- the three balance holes 721 are arranged into a regular triangle which is centered at a center point of the base plate 72 , and are spaced at uniform intervals on the base plate 72 .
- the balance holes 721 are round through holes. Centers of the three balance holes 721 are located on a same circle. A diameter of the circle on which the centers of the three balance holes 721 are located is denoted by D 3 . That is, the diameter at the locations of the three balance holes 721 is denoted by D 3 .
- the balance holes 721 of the base plate 72 can balance the flow pressure on opposite sides of the base plate 72 , maintain rotation stability of the impeller 70 , and can thus reduce the operational vibration of the pump 100 and ensure the operation efficiency of the pump 100 .
- the shape of the balance holes 721 is not limited to the round-hole shape as described above. Rather, the balance holes 721 may also be designed to be holes of another shape, such as triangular holes, square holes, rectangular holes, or other polygonal holes, or any combination of the listed holes, as long as the three balance holes 721 pass through the base plate 72 and are uniformly distributed on the base plate 72 such that the flow pressures on opposite sides of the impeller are balanced so as to reduce the axial vibrations applied to the impeller 70 during rotation. It should also be understood that the number of the balance holes 721 is not limited to three; rather, it may be four, five, six or more.
- a ratio of the diameter D 3 at the locations of the three balance holes 721 to the diameter D 2 of the impeller 72 is greater than or equal to 0.36, and less than or equal to 0.9. That is, the ratio of the diameter D 3 at the locations of the three balance holes 721 to the diameter D 2 of the impeller 72 (impeller diameter D 2 ) is:
- the ratio of the diameter D 3 at the locations of the three balance holes 721 to the diameter D 2 of the impeller 72 is in the range of 0.36 ⁇ 0.9, the axial force applied to the impeller 70 during rotation is relatively small, such that stable rotation of the impeller 70 can be achieved and the operation efficiency of the pump 100 can be ensured.
- a cross section area of each balance hole 721 is denoted by S1.
- the shaft mounting portion 74 is substantially circular cylindrical, which is disposed substantially perpendicularly on one side of the impeller 72 opposite from the driving shaft 54 and is coaxial with the driving shaft 54 .
- the shaft mounting portion 74 is located between the three balance holes 721 .
- An end of the shaft mounting portion 74 is connected to base plate 72 with a smooth transition therebetween, for facilitating maintaining the rotation stability of the impeller 70 .
- each long blade 76 has a terminating end adjacent to the radial rim of the base plate 72 and a start end of each long blade 76 relatively closed to the shaft mounting portion 74 comparing to the terminating end of the long blade 76 .
- a distance from the start end of each long blade 76 to an outer circumferential surface of the rotary shaft 74 is denoted by T 1 .
- the width of the flow passage in the main body 34 is optimized, which makes the flow of the fluid in the main body 34 more stable and smooth and, at the same time, can prevent foreign matters from jamming the inlet of the impeller 70 .
- each short blade 78 is disposed on the base plate 72 adjacent the shaft mounting portion 74 and surrounding the shaft mounting portion 74 .
- the number of the short blades 78 is three, and the three short blades 78 are uniformly distributed along the circumferential direction of the base plate 72 .
- Each short blade 78 is disposed between two adjacent long blades 76 , i.e. each short blade 78 and each long blade 76 are alternatively arranged.
- Each short blade 78 is an arcuate blade, and the three short blades 78 extend along radial directions of the base plate 72 to a radial rim of the base plate 72 .
- each short blade 78 has a terminating end adjacent to the radial rim of the base plate 72 and a start end of each short blade 78 relatively closed to the shaft mounting portion 74 comparing to the terminating end of the short blade 78 .
- a distance from the start end of each short blade 78 to the start position of one adjacent long blade 76 is denoted by T 2 .
- the width of the flow passage in the main body 34 is optimized, which makes the flow of the fluid in the main body 34 more stable and smooth and, at the same time, can prevent foreign matters from jamming the inlet of the impeller 70 .
- the plurality of the long blades 76 are disposed on the base plate 72 and are spaced from each other at uniform intervals
- the plurality of the short blades 78 are disposed on the base plate 72 and are spaced from each other at uniform intervals.
- the distance T 2 between the start end of each short blade 78 and the start end of one of two long blades 76 neighboring the short blade 78 may be equal or unequal to the distance T 2 between the start end of the short blade 78 and the start end of the other one long blade 76 neighboring the short blade 78 . It is more helpful for stabilizing the flow when the distances T 2 are all equal.
- a blade outlet flow passage is cooperatively bounded by a distal end of each long blade 76 , a distal end of each short blade 78 , and the edge of the base plate 72 .
- a blade outlet flow area is denoted by A 2 (indicated by the broken line of FIG. 6 ).
- the three long blades 76 and the three short blades 78 form six blade outlet flow passages on the base plate 72 , and a total area of the six blade outlet flow passages is referred as an impeller outlet flow area denoted by A 3 (not labeled).
- a ratio of A 1 to A 3 is denoted by k. In this embodiment, k is greater than or equal to 0.2, and less than or equal to 0.5. That is, the ratio of A 1 to A 3 satisfies:
- the pump housing 30 When the ratio of the outlet flow area A 1 of the receiving portion 341 of pump housing 30 to the impeller outlet flow area A 3 is in the range of 0.2 ⁇ 0.5, the pump housing 30 provides therein the flow passage with sufficient width for flowing of the fluid. In addition, this increases the velocity of the fluid and hence enhances the efficiency of the pump 100 while ensuring a compact size of the pump 100 .
- the long blades 76 and the short blades 78 have substantially the same height along an axial direction of the base plate 72 .
- the impeller 70 is received in the receiving chamber 3411 , top ends of the long blades 76 and/or the short blades 78 are spaced from a bottom wall of the receiving chamber 3411 by a predetermined gap. That is, the predetermined gap is formed between the impeller 70 and the bottom wall of the receiving portion 341 .
- the predetermined gap is referred to as an impeller gap denoted by T 3 .
- a ratio of the impeller gap T 3 to the diameter D 2 of the base plate 72 (impeller diameter D 2 ) is denoted by G.
- G is greater than or equal to 0.04, and less than or equal to 0.12. That is, the ratio of the impeller gap T 3 to the diameter D 2 of the base plate 72 is:
- the receiving chamber 3411 provides therein the determined flow passage for flowing of the fluid. In addition, this increases the velocity of the fluid and hence enhances the efficiency of the pump 100 while ensuring a compact size of the pump 100 .
- the impeller 70 is first mounted to the driving shaft 54 of the driving mechanism 50 , and the driving body 52 of the driving mechanism 50 is received and fixed in the mounting portion 321 of the cover 32 .
- the cover 32 is then placed to cover on the receiving chamber 3411 of the housing 34 , with the impeller 70 received in the receiving chamber 3411 .
- the assembled pump housing 30 is mounted to the mounting base 10 .
- the pump housing 30 is first filled with a fluid such as water, oil or gas, the inlet pipe 36 is fluidly connected with a container receiving the fluid, and the flow guide portion 343 is fluidly connected to the outside environment or another container for receiving the fluid.
- the driving mechanism 50 is then driven to rotate, which in turn drives the impeller 70 to rotate in the pump housing 30 .
- the fluid continuously flows from the container and the inlet pipe into the pump housing 30 , and is delivered to the outside environment or the another container for receiving the fluid via the flow guide portion 343 .
- the impeller 70 includes the alternatively arranged long and short arcuate blades, which further optimizes the design of the flow passage in the pump housing, thereby resulting in more smooth and stable flow of the fluid and enhanced fluid delivery efficiency.
- the extending direction of the blades of the impeller 70 is in compliance with the rotation direction of the impeller 70 , which reduces the occurrence of unstable phenomenon in the flow passage such as flow separation and secondary flow and hence improves the overall performance of the centrifugal pump.
- the pump 100 uses the single phase motor as the driving mechanism for driving the impeller 70 to rotate, which makes it easier to start the pump at low voltage.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
An impeller, and a pump and a fluid delivery device using the pump are disclosed. An impeller includes an base plate and a plurality of long blades and a plurality of short blades disposed on the base plate. The impeller further includes a shaft mounting portion disposed on the base plate. The plurality of long blades and the plurality of short blades are alternatively arranged on the base plate and surround the shaft mounting portion. The long blades and the short blades are all arcuate blades. The above fluid delivery device, the pump and the impeller have improved efficiency.
Description
- This non-provisional patent application claims priority under 35 U.S.C. §119(a) from Patent Application No. 201510882338.9 filed in The People's Republic of China on Dec. 3, 2015.
- This invention relates to an impeller, and in particular, to a centrifugal impeller and a pump and a fluid delivery device using the impeller.
- A centrifugal pump usually includes a motor which drives an impeller to rotate. Prior to startup of the pump, a pump housing and a suction pipe are filled with liquid. When the impeller rotates at high speed, the impeller drives the liquid between blades to rotate therewith. Because of the centrifugal force, the liquid is thrown from a center of the impeller to an outer edge of the impeller, and its kinetic energy is increased accordingly. When the liquid enters a pump casing, because a flow passage in the volute pump casing expands progressively, the speed of the flow progressively decreases. As a result, part of the kinetic energy is converted into static pressure energy, such that the liquid is discharged from an outlet with high pressure. At the same time, because the liquid is thrown out, a vacuum is established at a central area of the impeller and, as a result, the pressure at the liquid level is greater than that at the central area of the impeller. Therefore, the liquid in the suction pipe enters the pump due to the pressure difference. As the impeller rotates continuously, the liquid is continuously sucked in and propelled out, thereby achieving the liquid delivery purpose.
- The impeller of the conventional pump includes an base plate and straight blades disposed on the base plate. In order to make the flow of the fluid in the pump more stable, the blades are usually uniformly distributed on the impeller. However, such a centrifugal pump has poor liquid delivery efficiency.
- Thus, there is a desire for an impeller with improved efficiency, and a pump and a fluid delivery device using the impeller.
- An impeller includes an base plate, a plurality of long blades and a plurality of short blades disposed on the base plate. The impeller further includes a shaft mounting portion disposed on the base plate. The plurality of long blades and the plurality of short blades are alternatively arranged on the base plate and surround the shaft mounting portion. The long blades and the short blades are all arcuate blades.
- Preferably, the shaft mounting portion is a circular cylinder protruding from the base plate.
- Preferably, the long blade extend along radial directions of the base plate, each long blade has a terminating end adjacent to the radial rim of the base plate and a start end of each long blade relatively closed to the shaft mounting portion comparing to the terminating end of the long blade, a ratio of a distance between a start end of each long blade and an outer circumferential surface of the shaft mounting portion, to a diameter of the base plate is greater than or equal to 0.219, and less than or equal to 0.4;
- and/or, a ratio of a distance between a start position of each of the short blades and the start position of one adjacent long blade, to the diameter of the base plate is greater than or equal to 0.219, and less than or equal to 0.4.
- Preferably, the long blades are spaced from each other at uniform intervals, the short blades are spaced from each other at uniform intervals, and distances between a start end of each short blade and start ends of two long blades neighboring the short blade are the same;
- Preferably, the base plate defines a plurality of balance holes in the base plate.
- Preferably, the balance holes uniformly distributed on the base plate.
- Preferably, centers of the balance holes are located on a same circle, and a ratio of a diameter of the circle to a diameter of the base plate is greater than or equal to 0.36, and less than or equal to 0.9;
- and/or, a cross section area of each balance hole is greater than or equal to 9 mm2, and less than or equal to 240 mm2;
- and/or, each balance hole has at least one of the following shapes: round, square, triangle, and rectangle.
- Preferably, the shaft mounting portion is connected to the base plate with a smooth transition therebetween.
- A pump includes a driving mechanism and an impeller in accordance with any one as described above. The impeller is connected to the driving mechanism, and the driving mechanism is configured to drive the impeller to rotate.
- Preferably, the pump further includes a pump housing, the pump housing includes a main body and a cover disposed on the main body, the main body includes a volute-shaped receiving portion and a flow guide portion (343) connected to the receiving portion, the driving mechanism is mounted to the cover, and the receiving portion defines a receiving chamber accommodating the impeller.
- Preferably, the profile of the receiving chamber of the receiving portion is a spiral line substantially formed by a plurality of arc segments approximated, a ratio of a diameter D1 to a diameter D2 is greater than or equal to 1.05, and less than or equal to 1.1, wherein D1 is a diameter of one of the arc segments, at which the starting point of the spiral line is located, D2 is a diameter of the base plate;
- and/or, a ratio of an outlet flow area of the receiving portion to an outlet flow area of the impeller is greater than or equal to 0.2, and less than or equal to 0.5;
- and/or, a ratio of a distance between the impeller and a bottom wall of the receiving portion of the main body to the diameter of the base plate is greater than or equal to 0.04, and less than or equal to 0.12.
- Preferably, the flow guide portion defines an outlet passage communicating with the receiving chamber of the receiving portion, and a diameter of the outlet passage increases progressively in a direction away from the receiving portion; and/or, the pump further includes an inlet pipe, the inlet pipe is disposed at one side of the receiving portion opposite from the cover, and an inner chamber of the inlet pipe is in communication with the receiving chamber of the receiving portion.
- Preferably, the cover includes a mounting portion and a cover portion disposed on the mounting portion, the cover portion covers on the main body, and the driving mechanism is mounted in the mounting portion.
- Preferably, the pump further comprises a mounting base , and the mounting portion of the cover is fixedly disposed on the mounting base.
- Preferably, the mounting base includes a base body and a retaining portion disposed on the base body, the retaining portion includes two opposed claws, and the mounting portion is retained between the two claws.
- Preferably, the driving mechanism is a single phase motor.
- In the pump of the present invention, the impeller includes the alternatively arranged long and short arcuate blades, which further optimizes the design of the flow passage in the pump housing, thereby resulting in more smooth and stable flow of the fluid and enhanced fluid delivery efficiency.
-
FIG. 1 is a perspective view of a pump according to one embodiment of the present invention. -
FIG. 2 is a perspective, exploded view of the pump ofFIG. 1 . -
FIG. 3 is a perspective, exploded view of the pump ofFIG. 1 , viewed from another aspect. -
FIG. 4 is a sectional view of a pump housing of the pump ofFIG. 1 , taken along line IV-IV thereof -
FIG. 5 is a perspective view of an impeller of the pump ofFIG. 2 . -
FIG. 6 is a top plan view of the impeller of the pump ofFIG. 5 . -
FIG. 7 is a cross sectional view of the pump ofFIG. 1 , taken along line VII-VII thereof. - Below, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
- The technical solutions of the embodiments of the present invention will be clearly and completely described as follows with reference to the accompanying drawings. Apparently, the embodiments as described below are merely part of, rather than all, embodiments of the present invention. Based on the embodiments of the present disclosure, any other embodiment obtained by a person skilled in the art without paying any creative effort shall fall within the protection scope of the present invention.
- It is noted that, when a component is described to be “fixed” to another component, it can be directly fixed to the another component or there may be an intermediate component. When a component is described to be “connected” to another component, it can be directly connected to the another component or there may be an intermediate component. When a component is described to be “disposed” on another component, it can be directly disposed on the another component or there may be an intermediate component. The directional phraseologies such as “perpendicular” or similar expressions are for the purposes of illustration only.
- Unless otherwise specified, all technical and scientific terms have the ordinary meaning as understood by people skilled in the art. The terms used in this disclosure are illustrative rather than limiting. The term “and/or” as used in this disclosure means that each and every combination of one or more associated items listed are included.
- Referring to
FIG. 1 , apump 100 in accordance with one embodiment of the present invention is used to draw a liquid such as water or oil so as to deliver the liquid from a container to another container or an outside environment, for example, drain water off a water pool. In this embodiment, thepump 100 is a centrifugal pump. It should be understood that thepump 100 may also be used to draw and/or drain a fluid such as gas. - Referring to
FIG. 2 andFIG. 3 , thepump 100 includes a mountingbase 10, apump housing 30, adriving mechanism 50, and animpeller 70. In the illustrated specific embodiment, thepump housing 30 is connected to the mountingbase 10, and thedriving mechanism 50 and theimpeller 70 are received in thepump housing 30. Theimpeller 70 is disposed on thedriving mechanism 50. Thedriving mechanism 50 is used to drive theimpeller 70 to rotate to deliver the liquid from one side of thepump housing 30 to the other side of thepump housing 30, thus achieving the fluid delivery by the pump. - In this embodiment, the mounting
base 10 is generally an irregular block-shaped base body for mounting thepump housing 30 and receiving electric control elements (not shown) for driving thepump 100 to operate. - The mounting
base 10 includes abase body 12 and a retainingportion 14 disposed on thebase body 12. The electric control elements are disposed in thebase body 12. It should be understood that, in some other embodiments, thebase body 12 may receive another element such as a heat dissipating element. The retainingportion 14 is disposed on one side of thebase body 12, which includes two claws 141. The two claws 141 are disposed adjacent each other and spaced apart from each other. The two claws 141 are used to retain thepump housing 30. It should be understood that the number of the claws 141 is not limited to two, which may also be three, four or more. - In this embodiment, the
pump housing 30 includes acover 32, amain body 34, and aninlet pipe 36. In the illustrated specific embodiment, thecover 32 covers one side of themain body 34, and theinlet pipe 36 is disposed at the other side of themain body 34. - The
cover 32 includes a mountingportion 321 and acover portion 323 connected to the mountingportion 321. The mountingportion 321 is generally hollow cylindrical, which is mounted on the retainingportion 14 and located between the two claws 141. The mountingportion 321 is used to receive thedriving mechanism 50. Thecover portion 323 is disposed at one end of the mountingportion 321, for covering themain body 34. - The
main body 34 is disposed on thecover portion 323, which includes a volute-shapedreceiving portion 341 and aflow guide portion 343 connected to a circumferential side of the receivingportion 341. The receivingportion 341 defines a receivingchamber 3411 in communication with an inner chamber of thecover 32, for receiving theimpeller 70. Theflow guide portion 343 is generally hollow tubular and defines anoutlet passage 3431 along the central axis thereof and communicating with the receivingchamber 3411, for allowing the fluid such as water, oil or gas to flow therethrough. The central axis of theflow guide portion 343 is substantially perpendicular to a central axis of the receivingportion 341. - The
inlet pipe 36 is generally hollow tubular, which is disposed on one side of the receivingportion 341 away from thecover 32, with a central axis of theinlet pipe 36 substantially parallel to or coincident with the central axis of the receivingportion 341. Ainlet passage 361 is defined in theinlet pipe 36 along the central axis thereof. Theinlet passage 361 communicates with the receivingchamber 3411, which provides a passage for allowing the fluid such as water, oil or gas to flow therethrough. - Referring to
FIG. 4 , themain body 34 is volute shaped. The profile of the receiving chamber of the receivingportion 341 is a spiral line substantially formed by a plurality of arc segments approximated. In one embodiment, the plurality of arc segments includes 4 arc segments. A diameter of one of the arc segments, at which the starting point of the spiral is located, is denoted by Dl. A diameter of theoutlet passage 3431 in theflow guide portion 343 progressively increases in a direction away from the receivingchamber 3411, such that a dynamic head of the fluid out of the receivingportion 341 is converted into a static head, thus ensuring smooth fluid delivery. - Further, the
flow guide portion 343 and the receivingportion 341 are connected with smooth transition therebetween. An outlet flow area of the receivingportion 341, which is a cross-sectional area at the joint between theflow guide portion 343 and the receivingportion 341, is denoted by A1. - Referring again to
FIG. 2 andFIG. 3 , in this embodiment, thedriving mechanism 50 is a rotary motor and, preferably, a single phase motor. Thedriving mechanism 50 is disposed in the mountingportion 321 of thecover 32, for driving theimpeller 70 to rotate. Specifically, thedriving mechanism 50 includes a drivingbody 52 and a drivingshaft 54 disposed on the drivingbody 52, and the drivingbody 52 is fixedly disposed in the mountingportion 321. The drivingshaft 54 is disposed at one end of the drivingbody 52 adjacent themain body 34 and extends from within thecover 32 into the receivingchamber 3411 of themain body 34. The drivingshaft 54 can rotate, under the driving the drivingbody 52, to drive theimpeller 70 to rotate. - In this embodiment, the
driving mechanism 50 is a single phase brushless motor. The single phase brushless motor is capable of directed rotation, under the control of an electronic speed regulator, without additional backstop mechanism disposed in thepump 100, which improves the operating efficiency and stability of thepump 100. - Referring also to
FIG. 5 , theimpeller 70 is mounted on the drivingshaft 54 and received in the receivingchamber 3411. Theimpeller 70 includes anbase plate 72, ashaft mounting portion 74,long blades 76, andshort blades 78. In the illustrated specific embodiment, theshaft mounting portion 74 is disposed substantially at a center of thebase plate 72, and thelong blades 76 and theshort disc 78 are disposed on thebase plate 72. - Referring also to
FIG. 6 , thebase plate 72 is substantially a circular disc, which is fixedly attached around the drivingshaft 54 and is capable of rotation under the driving of the drivingshaft 54. A diameter of thebase plate 72, which is also a diameter of thebase plate 70, is denoted by D2. A ratio of the diameter D1 of the first inner surface arc segment of the receivingportion 341 of thehousing 34 to the diameter D2 of the base plate 72 (the diameter D2 of the impeller) is denoted by m, where m is equal to or greater than 1.05, and equal to or less than 1.1. That is, -
m=D1:D2=1.05˜1.10 - Balance holes 721 are formed in the
base plate 72. In this embodiment, the balance holes 721 are through holes passing through thebase plate 72, and the number of the balance holes 721 is three. The threebalance holes 721 are arranged into a regular triangle which is centered at a center point of thebase plate 72, and are spaced at uniform intervals on thebase plate 72. In this embodiment, the balance holes 721 are round through holes. Centers of the threebalance holes 721 are located on a same circle. A diameter of the circle on which the centers of the threebalance holes 721 are located is denoted by D3. That is, the diameter at the locations of the threebalance holes 721 is denoted by D3. - The balance holes 721 of the
base plate 72 can balance the flow pressure on opposite sides of thebase plate 72, maintain rotation stability of theimpeller 70, and can thus reduce the operational vibration of thepump 100 and ensure the operation efficiency of thepump 100. - It should be understood that the shape of the balance holes 721 is not limited to the round-hole shape as described above. Rather, the balance holes 721 may also be designed to be holes of another shape, such as triangular holes, square holes, rectangular holes, or other polygonal holes, or any combination of the listed holes, as long as the three
balance holes 721 pass through thebase plate 72 and are uniformly distributed on thebase plate 72 such that the flow pressures on opposite sides of the impeller are balanced so as to reduce the axial vibrations applied to theimpeller 70 during rotation. It should also be understood that the number of the balance holes 721 is not limited to three; rather, it may be four, five, six or more. - Preferably, a ratio of the diameter D3 at the locations of the three
balance holes 721 to the diameter D2 of the impeller 72 (impeller diameter D2) is greater than or equal to 0.36, and less than or equal to 0.9. That is, the ratio of the diameter D3 at the locations of the threebalance holes 721 to the diameter D2 of the impeller 72 (impeller diameter D2) is: -
D3:D2=0.36˜0.9 - When the ratio of the diameter D3 at the locations of the three
balance holes 721 to the diameter D2 of the impeller 72 (impeller diameter D2) is in the range of 0.36˜0.9, the axial force applied to theimpeller 70 during rotation is relatively small, such that stable rotation of theimpeller 70 can be achieved and the operation efficiency of thepump 100 can be ensured. - A cross section area of each
balance hole 721 is denoted by S1. Preferably, S1 is greater than or equal to 9 mm2, and less than or equal to 240 mm2, i.e. S1=9˜240 mm2. - The
shaft mounting portion 74 is substantially circular cylindrical, which is disposed substantially perpendicularly on one side of theimpeller 72 opposite from the drivingshaft 54 and is coaxial with the drivingshaft 54. Theshaft mounting portion 74 is located between the three balance holes 721. An end of theshaft mounting portion 74 is connected tobase plate 72 with a smooth transition therebetween, for facilitating maintaining the rotation stability of theimpeller 70. - There are a plurality of the
long blades 76 disposed on thebase plate 72 adjacent theshaft mounting portion 74 and surrounding theshaft mounting portion 74. In this embodiment, the number of thelong blades 76 is three, and the threelong blades 76 are uniformly distributed along a circumferential direction of thebase plate 72. Eachlong blade 76 is an arcuate blade, and the threelong blades 76 extend along radial directions of thebase plate 72 to a radial rim of thebase plate 72. In other words, eachlong blade 76 has a terminating end adjacent to the radial rim of thebase plate 72 and a start end of eachlong blade 76 relatively closed to theshaft mounting portion 74 comparing to the terminating end of thelong blade 76. A distance from the start end of eachlong blade 76 to an outer circumferential surface of therotary shaft 74 is denoted by T1. - Preferably, a ratio of the distance T1 to the diameter D2 of the base plate 72 (that is impeller diameter D2) is ranged from 0.219˜0.4, i.e. T1/D2=0.219˜0.4.
- When the ratio of T1:D2 is defined in such range, the width of the flow passage in the
main body 34 is optimized, which makes the flow of the fluid in themain body 34 more stable and smooth and, at the same time, can prevent foreign matters from jamming the inlet of theimpeller 70. - There are a plurality of the
short blades 78 disposed on thebase plate 72 adjacent theshaft mounting portion 74 and surrounding theshaft mounting portion 74. In this embodiment, the number of theshort blades 78 is three, and the threeshort blades 78 are uniformly distributed along the circumferential direction of thebase plate 72. Eachshort blade 78 is disposed between two adjacentlong blades 76, i.e. eachshort blade 78 and eachlong blade 76 are alternatively arranged. Eachshort blade 78 is an arcuate blade, and the threeshort blades 78 extend along radial directions of thebase plate 72 to a radial rim of thebase plate 72. In other words, eachshort blade 78 has a terminating end adjacent to the radial rim of thebase plate 72 and a start end of eachshort blade 78 relatively closed to theshaft mounting portion 74 comparing to the terminating end of theshort blade 78. A distance from the start end of eachshort blade 78 to the start position of one adjacentlong blade 76 is denoted by T2. - Preferably, a ratio of the distance T2 to the diameter D2 of the base plate 72 (base plate D2) is ranged from 0.219˜0.4, i.e. T2/D2=0.219˜0.4.
- When the ratio of T2/D2=0.219˜0.4 is defined in such range, the width of the flow passage in the
main body 34 is optimized, which makes the flow of the fluid in themain body 34 more stable and smooth and, at the same time, can prevent foreign matters from jamming the inlet of theimpeller 70. - In this embodiment, the plurality of the
long blades 76 are disposed on thebase plate 72 and are spaced from each other at uniform intervals, the plurality of theshort blades 78 are disposed on thebase plate 72 and are spaced from each other at uniform intervals. The distance T2 between the start end of eachshort blade 78 and the start end of one of twolong blades 76 neighboring theshort blade 78 may be equal or unequal to the distance T2 between the start end of theshort blade 78 and the start end of the other onelong blade 76 neighboring theshort blade 78. It is more helpful for stabilizing the flow when the distances T2 are all equal. - Referring to
FIG. 6 , a blade outlet flow passage is cooperatively bounded by a distal end of eachlong blade 76, a distal end of eachshort blade 78, and the edge of thebase plate 72. A blade outlet flow area is denoted by A2 (indicated by the broken line ofFIG. 6 ). The threelong blades 76 and the threeshort blades 78 form six blade outlet flow passages on thebase plate 72, and a total area of the six blade outlet flow passages is referred as an impeller outlet flow area denoted by A3 (not labeled). A ratio of A1 to A3 is denoted by k. In this embodiment, k is greater than or equal to 0.2, and less than or equal to 0.5. That is, the ratio of A1 to A3 satisfies: -
k=A1:A3=0.2˜0.5 - When the ratio of the outlet flow area A1 of the receiving
portion 341 ofpump housing 30 to the impeller outlet flow area A3 is in the range of 0.2˜0.5, thepump housing 30 provides therein the flow passage with sufficient width for flowing of the fluid. In addition, this increases the velocity of the fluid and hence enhances the efficiency of thepump 100 while ensuring a compact size of thepump 100. - Referring also to
FIG. 7 , further, thelong blades 76 and theshort blades 78 have substantially the same height along an axial direction of thebase plate 72. When theimpeller 70 is received in the receivingchamber 3411, top ends of thelong blades 76 and/or theshort blades 78 are spaced from a bottom wall of the receivingchamber 3411 by a predetermined gap. That is, the predetermined gap is formed between theimpeller 70 and the bottom wall of the receivingportion 341. The predetermined gap is referred to as an impeller gap denoted by T3. - A ratio of the impeller gap T3 to the diameter D2 of the base plate 72 (impeller diameter D2) is denoted by G. Preferably, G is greater than or equal to 0.04, and less than or equal to 0.12. That is, the ratio of the impeller gap T3 to the diameter D2 of the
base plate 72 is: -
G=T3:D2=0.04˜0.12 - When the ratio of the impeller gap T3 to the diameter D2 of the base plate 72 (impeller diameter D2) is in the range of 0.04˜0.12, the receiving
chamber 3411 provides therein the determined flow passage for flowing of the fluid. In addition, this increases the velocity of the fluid and hence enhances the efficiency of thepump 100 while ensuring a compact size of thepump 100. - In assembly of the
pump 100 of this embodiment, theimpeller 70 is first mounted to the drivingshaft 54 of thedriving mechanism 50, and the drivingbody 52 of thedriving mechanism 50 is received and fixed in the mountingportion 321 of thecover 32. Thecover 32 is then placed to cover on the receivingchamber 3411 of thehousing 34, with theimpeller 70 received in the receivingchamber 3411. Finally, the assembledpump housing 30 is mounted to the mountingbase 10. In use of thepump 100 of this embodiment, thepump housing 30 is first filled with a fluid such as water, oil or gas, theinlet pipe 36 is fluidly connected with a container receiving the fluid, and theflow guide portion 343 is fluidly connected to the outside environment or another container for receiving the fluid. Thedriving mechanism 50 is then driven to rotate, which in turn drives theimpeller 70 to rotate in thepump housing 30. Under the action of the centrifugal force and a pressure difference established between the blades of theimpeller 70 and the inner surface of thepump housing 30, the fluid continuously flows from the container and the inlet pipe into thepump housing 30, and is delivered to the outside environment or the another container for receiving the fluid via theflow guide portion 343. - In the
pump 100 of the present invention, theimpeller 70 includes the alternatively arranged long and short arcuate blades, which further optimizes the design of the flow passage in the pump housing, thereby resulting in more smooth and stable flow of the fluid and enhanced fluid delivery efficiency. In addition, the extending direction of the blades of theimpeller 70 is in compliance with the rotation direction of theimpeller 70, which reduces the occurrence of unstable phenomenon in the flow passage such as flow separation and secondary flow and hence improves the overall performance of the centrifugal pump. Moreover, thepump 100 uses the single phase motor as the driving mechanism for driving theimpeller 70 to rotate, which makes it easier to start the pump at low voltage. - Although the invention is described with reference to one or more embodiments, the above description of the embodiments is used only to enable people skilled in the art to practice or use the invention. It should be appreciated by those skilled in the art that various modifications are possible without departing from the spirit or scope of the present invention. The embodiments illustrated herein should not be interpreted as limits to the present invention, and the scope of the invention is to be determined by reference to the claims that follow.
- Although the invention is described with reference to one or more embodiments, the above description of the embodiments is used only to enable people skilled in the art to practice or use the invention. It should be appreciated by those skilled in the art that various modifications are possible without departing from the spirit or scope of the present invention. The embodiments illustrated herein should not be interpreted as limits to the present invention, and the scope of the invention is to be determined by reference to the claims that follow.
Claims (17)
1. An impeller comprising:
an base plate;
a shaft mounting portion disposed on the base plate,
a plurality of long blades and a plurality of short blades disposed on a side of the base plate, the plurality of long blades and the plurality of short blades being alternatively arranged on the base plate along a circumferential direction of the base plate, and surrounding the shaft mounting portion, the long blades and the short blades being all arcuate blades.
2. The impeller of claim 1 , wherein the shaft mounting portion is a circular cylinder protruding from the base plate.
3. The impeller of claim 1 , wherein each the long blade extend along radial directions of the base plate, each long blade has a terminating end adjacent to the radial rim of the base plate and a start end of each long blade relatively closed to the shaft mounting portion comparing to the terminating end of the long blade, a ratio of a distance between a start end of each long blade and an outer circumferential surface of the shaft mounting portion, to a diameter of the base plate is greater than or equal to 0.219, and less than or equal to 0.4, and/or, a ratio of a distance between a start position of each of the short blades and the start position of one adjacent long blade, to the diameter of the base plate is greater than or equal to 0.219, and less than or equal to 0.4.
4. The impeller of claim 3 , wherein the long blades are spaced from each other at uniform intervals, the short blades are spaced from each other at uniform intervals, and distances between a start end of each short blade and start ends of two long blades neighboring the short blade are the same.
5. The impeller of any of claims 1 , wherein the base plate defines a plurality of balance holes in the base plate.
6. The impeller of claim 5 , wherein the balance holes uniformly distributed on the base plate.
7. The impeller of claim 6 , wherein centers of the balance holes are located on a same circle, and a ratio of a diameter of the circle to a diameter of the base plate is greater than or equal to 0.36, and less than or equal to 0.9;
and/or, a cross section area of each balance hole is greater than or equal to 9 mm2, and less than or equal to 240 mm2;
and/or, each balance hole has at least one of the following shapes: round, square, triangle, and rectangle.
8. The impeller of any of claims 1 , wherein the shaft mounting portion is connected to the base plate with a smooth transition therebetween.
9. A pump comprising:
a driving mechanism; and
an impeller connected to the driving mechanism, the driving mechanism being configured to drive the impeller to rotate, the impeller comprising:
an base plate;
a shaft mounting portion disposed on the base plate; and
a plurality of long blades and a plurality of short blades disposed on the base plate, the plurality of long blades and the plurality of short blades being alternatively arranged on the base plate along a circumferential direction of the base plate, and surrounding the shaft mounting portion, the long blades and the short blades being all arcuate blades.
10. The pump of claim 9 , wherein the pump further includes a pump housing, the pump housing includes a main body and a cover disposed on the main body, the main body includes a volute-shaped receiving portion and a flow guide portion (343) connected to the receiving portion, the driving mechanism is mounted to the cover, and the receiving portion defines a receiving chamber accommodating the impeller.
11. The pump of claim 10 , wherein the profile of the receiving chamber of the receiving portion is a spiral line substantially formed by a plurality of arc segments approximated, a ratio of a diameter D1 to a diameter D2 is greater than or equal to 1.05, and less than or equal to 1.1, wherein D1 is a diameter of one of the arc segments, at which the starting point of the spiral line is located, D2 is a diameter of the base plate;
and/or, a ratio of an outlet flow area of the receiving portion to an outlet flow area of the impeller is greater than or equal to 0.2, and less than or equal to 0.5;
and/or, a ratio of a distance between the impeller and a bottom wall of the receiving portion of the main body to the diameter of the base plate is greater than or equal to 0.04, and less than or equal to 0.12.
12. The pump of claim 10 , wherein the flow guide portion defines an outlet passage communicating with the receiving chamber of the receiving portion, and a diameter of the outlet passage increases progressively in a direction away from the receiving portion;
and/or, the pump housing further includes an inlet pipe, the inlet pipe is disposed at one side of the receiving portion opposite from the cover, and an inner chamber of the inlet pipe is in communication with the receiving chamber of the receiving portion.
13. The pump of claim 10 , wherein the cover includes a mounting portion and a cover portion disposed on the mounting portion, the cover portion covers on the main body, and the driving mechanism is mounted in the mounting portion.
14. The pump of claim 13 , wherein the pump further comprises a mounting base, and the mounting portion of the cover is fixedly disposed on the mounting base.
15. The pump of claim 14 , wherein the mounting base includes a base body and a retaining portion disposed on the base body, the retaining portion includes two opposed claws, and the mounting portion is retained between the two claws.
16. The pump of claim 10 , wherein the driving mechanism is a single phase motor.
17. A fluid delivery device comprising:
a driving mechanism; and
an impeller connected to the driving mechanism, the driving mechanism being configured to drive the impeller to rotate, the impeller comprising:
an base plate;
a shaft mounting portion disposed on the base plate; and
a plurality of long blades and a plurality of short blades disposed on the base plate, the plurality of long blades and the plurality of short blades being alternatively arranged on the base plate and surrounding the shaft mounting portion, the long blades and the short blades being all arcuate blades.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201510882338.9A CN106837853A (en) | 2015-12-03 | 2015-12-03 | Impeller and the pump machine and fluid delivery system using the impeller |
CN201510882338.9 | 2015-12-03 |
Publications (1)
Publication Number | Publication Date |
---|---|
US20170159669A1 true US20170159669A1 (en) | 2017-06-08 |
Family
ID=58722752
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US15/369,126 Abandoned US20170159669A1 (en) | 2015-12-03 | 2016-12-05 | Impeller, And Pump And Fluid Delivery Device Using The Impeller |
Country Status (5)
Country | Link |
---|---|
US (1) | US20170159669A1 (en) |
JP (1) | JP2017115866A (en) |
CN (1) | CN106837853A (en) |
DE (1) | DE102016123171A1 (en) |
MX (1) | MX2016015843A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20180266430A1 (en) * | 2017-03-20 | 2018-09-20 | New Motech Co., Ltd. | Pump for circulating water |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP4206478A4 (en) * | 2020-11-12 | 2024-02-28 | Welling Wuhu Motor Mfg Co Ltd | Impeller, drainage pump, and air-conditioning indoor unit |
CN113082506B (en) * | 2021-05-12 | 2023-04-28 | 苏州大学 | Blood pump applied to artificial heart |
-
2015
- 2015-12-03 CN CN201510882338.9A patent/CN106837853A/en active Pending
-
2016
- 2016-11-30 DE DE102016123171.1A patent/DE102016123171A1/en not_active Withdrawn
- 2016-12-01 MX MX2016015843A patent/MX2016015843A/en unknown
- 2016-12-05 US US15/369,126 patent/US20170159669A1/en not_active Abandoned
- 2016-12-05 JP JP2016235763A patent/JP2017115866A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20180266430A1 (en) * | 2017-03-20 | 2018-09-20 | New Motech Co., Ltd. | Pump for circulating water |
US10502224B2 (en) * | 2017-03-20 | 2019-12-10 | New Motech Co., Ltd. | Pump for circulating water |
Also Published As
Publication number | Publication date |
---|---|
CN106837853A (en) | 2017-06-13 |
JP2017115866A (en) | 2017-06-29 |
DE102016123171A1 (en) | 2017-06-08 |
MX2016015843A (en) | 2018-05-31 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US10495102B2 (en) | Impeller and pump using the impeller | |
EP3133294B1 (en) | Fan, diffuser, and vacuum cleaner having the same | |
RU2720874C2 (en) | Impeller unit for centrifugal pumps | |
US20170159669A1 (en) | Impeller, And Pump And Fluid Delivery Device Using The Impeller | |
US10233944B2 (en) | Impeller structure with improved rotation stability | |
JP2016142200A (en) | Centrifugal compressor | |
KR101694847B1 (en) | spurt pump | |
KR102153561B1 (en) | Centrifugal blood pump | |
US7153097B2 (en) | Centrifugal impeller and pump apparatus | |
KR102512291B1 (en) | Fan Motor and Manufacturing the Same | |
JP2016017500A (en) | Centrifugal blower | |
JP2015178776A (en) | Centrifugal impeller and centrifugal pump including the same | |
US20100040461A1 (en) | Volute for centrifugal pump | |
KR20200007329A (en) | Disc for rotary disc pumps | |
JP2013057275A (en) | Centrifugal pump | |
JP2010174630A (en) | Pump impeller, and pump | |
JP2017180374A (en) | Pump device | |
US9410548B2 (en) | Pumping device | |
JP5766461B2 (en) | Pump device | |
US11181119B2 (en) | Impeller and water pump having the same | |
JP2008151074A (en) | Pump | |
KR100300344B1 (en) | Pump | |
WO2019220579A1 (en) | Multi-stage pump | |
JP2009007959A (en) | Centrifugal pump | |
KR20210033452A (en) | Fan Motor |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: JOHNSON ELECTRIC S.A., SWITZERLAND Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:FANG, CHUAN HUI;XUE, FENG;CHEN, MING JU;AND OTHERS;REEL/FRAME:040603/0705 Effective date: 20161129 |
|
STPP | Information on status: patent application and granting procedure in general |
Free format text: NON FINAL ACTION MAILED |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |