TW201441489A - Fluid pump low turbulence impeller - Google Patents

Abstract

A fluid pump low turbulence impeller includes a first base wall, a second base wall, a plurality of diversion blades, and a plurality of blocking plates. The second base wall is formed with an inlet. Every two adjacent diversion blades and blocking plates corresponding thereto and connected therewith collectively define a flow channel. An outlet of the flow channel is defined between every two adjacent ones of the blocking plates. Each flow channel includes a laminar flow area aligning with the outlet, a turbulence area aligning with the blocking plates, and a transition flow area aligning with the blocking plates. With the design of the blocking plates blocking the turbulence area and the transition area, fluid can only flow out of the outlet through the laminar flow area. As such, the fluid discharged from the outlet of each flow channel is in a low turbulence state so as to significantly prevent fluid from generating a phenomenon of backward flowing resulting from a negative pressure and a phenomenon of cavitation caused by turbulence. When the fluid pump low turbulence impeller is in operation, the rotational speed thereof can be raised to increase the efficiency of discharging fluid.

Description

Fluid pumping low turbulent flow impeller

The present invention relates to a pump impeller, and more particularly to a centrifugal fluid pumping low turbulent flow impeller.

Referring to FIG. 1 and FIG. 2, a general centrifugal pump impeller 1 generally includes a first base wall 11, a second base wall 12 spaced apart from the first base wall 11, and a plurality of pieces connected to the first base wall 11 and The blade 13 between the second base walls 12. An inlet 121 for fluid inflow is formed in the center of the second base wall 12. The blades 13 are annular and spaced apart, each blade 13 has a first leaf surface 131, and a second leaf surface 132 opposite the first leaf surface 131, the first leaf of each two adjacent blades 13 The surface 131 and the second leaf surface 132 jointly define a flow path 14 for the fluid to flow out, and the thickness of each of the blades 13 is uniform, and the width of each flow path 14 is gradually widened from the inner side toward the outer circumference of the pump impeller 1. .

When the motor drives the pump impeller 1 to rotate in a rotational direction R through the drive shaft, the fluid flows into the pump impeller 1 via the inlet 121, and then flows out of an outlet 140 of each passage 14 by centrifugal force. Since the width of each flow passage 14 is gradually widened from the inner side toward the outer circumference of the pump impeller 1, each flow passage 14 has a laminar flow region 141 adjacent to the first vane surface 131, A turbulent zone 142 adjacent to the second foliar surface 132, and a transitional flow zone 143 between the laminar flow zone 141 and the turbulent zone 142, the laminar flow zone 141, the turbulent zone 142 and the transitional flow zone 143 simultaneously correspond to Exit 140. When a fluid flows into each of the flow passages 14, a portion of the fluid flows out through the laminar flow region 141 in an arrow D direction, and a part of the fluid first forms a reverse-rotating vortex V in the turbulent flow region 142 and then flows out through the outlet 140, so that The fluid exiting the outlet 140 creates a highly turbulent state. As a result, the fluid is caused to flow back due to the negative pressure, which is liable to cause cavitation and damage of the blade 13. If the rotational speed of the pump impeller 1 is increased, the above phenomenon is more serious, so that the existing pump impeller 1 cannot be rotated at the time of operation, so the fluid discharge efficiency is poor.

Therefore, the main object of the present invention is to provide a fluid-pumped low-turbulent flow impeller through which the fluid flowing out through the outlet of each flow channel exhibits a low turbulent flow state, which can greatly reduce cavitation caused by turbulence. Thereby, energy consumption can be reduced to improve fluid discharge efficiency.

Thus, the fluid pumping low turbulent flow impeller of the present invention comprises a first base wall, a second base wall, a plurality of guide vanes, and a plurality of flaps.

The first base wall includes a first inner wall surface and a first outer peripheral edge, the second base wall is spaced apart from the first base wall, and the second base wall includes a second inner wall surface facing the first inner wall surface. And a second outer periphery, the second base wall is formed with an inlet, and a plurality of guide vanes are connected between the first inner wall surface and the second inner wall surface, and the guide vanes are annularly spaced apart from each other Each of the guide vanes includes an inner end and an outer end opposite to the inner end a side end, a first leaf surface between the inner side end and the outer side end, and a second leaf surface opposite to the first leaf surface, the plurality of flaps being disposed on the first side of the first base wall The outer periphery and the second outer periphery of the second base wall, the blocks are spaced apart from each other and together form a ring shape, each of the blocks being connected to the corresponding outer end of the guide vane, two phases The adjacent guide vanes and the correspondingly connected flaps jointly define a first-class track, and each of the two adjacent adjacent flaps defines an outlet of the flow passage, and each of the flow props has a neighboring corresponding The first leaf surface of the guide vane is aligned with the laminar flow region of the exit position, and a turbulent flow region adjacent to the corresponding second vane surface of the guide vane and aligned with the flap position.

Each of the flow passages also has a transition flow zone between the laminar flow zone and the turbulent zone and aligned with the stop position.

Each of the blocking pieces includes a connecting end connected to the corresponding outer end of the guiding vane, and an end opposite to the connecting end.

Each of the blocking pieces further includes a stopping surface formed between the connecting end and the end, and the stopping surface of each of the blocking pieces is connected with the corresponding second leaf surface of the guiding vane, and each of the blocking surfaces The surface is sandwiched between the second leaf surface and the angle is an obtuse angle.

The blocking piece is connected between the first outer peripheral edge of the first base wall and the second outer peripheral edge of the second base wall, and the connecting end of each of the blocking pieces is integrally connected to the corresponding diversion The outer end of the blade.

The fluid pumping low turbulent flow impeller further comprises a ring sleeve sleeved and fixed to the first outer circumference of the first base wall and the second outer circumference of the second base wall, the collar comprising two Interlaced loops and such baffles, The flaps are connected between the two loops.

The utility model has the advantages that the turbulent flow zone and the transition flow zone are blocked by the flow blocks, so that the fluid can only flow out of the outlet through the laminar flow zone, whereby the fluid discharged from the outlet of each flow channel It is a state of low turbulence, which can greatly reduce the backflow phenomenon caused by the negative pressure of the fluid and the cavitation phenomenon caused by the turbulent flow to avoid the damage of the guide vane. Furthermore, the fluid-pumped low turbulent impeller can increase its rotational speed during operation to increase fluid discharge efficiency.

200, 210‧‧‧ fluid pumped low turbulent flow impeller

220‧‧‧Fluid pumping low turbulent flow impeller

2‧‧‧First base wall

21‧‧‧First inner wall

22‧‧‧First outer periphery

23‧‧‧Axis joint

3‧‧‧ second base wall

31‧‧‧Second inner wall

32‧‧‧Second outer periphery

33‧‧‧ entrance

4‧‧‧Guide vanes

41‧‧‧Inside

42‧‧‧Outside

43‧‧‧First foliar

44‧‧‧Second leaf

50‧‧‧ collar

5‧‧‧Block

51‧‧‧Connecting end

End of 52‧‧‧

53‧‧‧stop surface

54‧‧‧ ring

6‧‧‧ flow path

60‧‧‧Export

61‧‧‧Laminar flow zone

62‧‧‧ Turbulent Zone

63‧‧‧Transitional flow zone

A‧‧‧ angle

D‧‧‧ arrow

R‧‧‧Rotation direction

V‧‧‧ eddy current

Other features and effects of the present invention will be apparent from the following description of the drawings, wherein: FIG. 1 is a partial cross-sectional perspective view of a conventional centrifugal pump impeller; FIG. 2 is a front view of a conventional centrifugal pump impeller BRIEF DESCRIPTION OF THE DRAWINGS FIG. 3 is a partially cutaway perspective view showing a first preferred embodiment of a fluid pumping low turbulent flow impeller according to the present invention, illustrating a first base wall, a second base wall, and a guide vane; And FIG. 4 is a side cross-sectional view showing the first preferred embodiment of the fluid pumping low turbulent flow impeller of the present invention; FIG. 5 is the first of the fluid pumping low turbulent flow impeller of the present invention; A front cross-sectional view of the preferred embodiment illustrates that some of the fluid in the laminar flow region of the inflow channel will flow out of the outlet, and part of the fluid flowing into the turbulent zone and the transitional flow zone will be blocked by the stop surface of the baffle. Figure 6 is a second preferred embodiment of the fluid pumping low turbulent flow impeller of the present invention A partial cross-sectional perspective view of the example, illustrating that the collar is sleeved and fixed to the first outer peripheral edge of the first base wall and the second outer peripheral edge of the second base wall, and the collar has a loop and a flap; FIG. 7 is the present invention A front cross-sectional view of a second preferred embodiment of a fluid pumped low turbulent flow impeller illustrating that a portion of the fluid in the laminar flow region of the inflow passage will flow out of the outlet and into the turbulent region and portions of the transitional flow region The fluid is blocked by the stop surface of the flap; Figure 8 is a perspective view of a third preferred embodiment of the fluid pumped low turbulent flow impeller of the present invention; and Figure 9 is a third comparison of the fluid pumped low turbulent flow impeller of the present invention. A schematic front cross-sectional view of a preferred embodiment.

Before the present invention is described in detail, it should be noted that in the following description, similar elements are denoted by the same reference numerals.

Referring to Figure 3, there is shown a first preferred embodiment of the fluid pumping low turbulent flow impeller of the present invention. The fluid pumping low turbulent flow impeller 200 is disposed in a housing (not shown) of the centrifugal pump, centrifuged The pumped motor drives the fluid pumping low turbulent flow impeller 200 to rotate through a drive shaft (not shown).

Referring to FIGS. 3, 4 and 5, the fluid pumping low turbulent flow impeller 200 includes a first base wall 2, a second base wall 3, a plurality of guide vanes 4, and a plurality of flaps 5. The first base wall 2 is circular and includes a first inner wall surface 21 and a first outer peripheral edge 22. A shaft joint 23 is disposed at the center of the first base wall 2, and the shaft joint portion 23 is connected to the drive shaft and can be rotated by the motor. The second base wall 3 is spaced apart from the first base wall 2 and parallel to each other, and the second base wall 3 It is annular and includes a second inner wall surface 31 facing the first inner wall surface 21, and a second outer peripheral edge 32. The second base wall 3 is formed with an inlet 33 for supplying fluid such as air or water. The guide vanes 4 are connected between the first inner wall surface 21 of the first base wall 2 and the second inner wall surface 31 of the second base wall 3, and the guide vanes 4 are annularly arranged at intervals. The guide vane 4 has an arc shape and includes an inner end 41, an outer end 42 opposite to the inner end 41, a first foliar 43 between the inner end 41 and the outer end 42, and a first The second leaf surface 44 of the leaf surface 43.

The blocking piece 5 is disposed on the first outer peripheral edge 22 of the first base wall 2 and the second outer peripheral edge 32 of the second base wall 3. In the embodiment, the blocking pieces 5 are connected to the first inner wall surface 21 Between the second inner wall surface 31 and between the first outer peripheral edge 22 and the second outer peripheral edge 32, the flaps 5 are spaced apart from each other and together form a ring shape. Each flap 5 is coupled to the outer end 42 of the corresponding guide vane 4 for blocking fluid. Each of the two adjacent guide vanes 4 and their correspondingly connected baffles 5 together define a first-class track 6, and an outlet 60 for the flow path 6 is defined between each two adjacent baffles 5. Each flow passage 6 has a laminar flow region 61 adjacent to the first foliar surface 43 of the corresponding guide vane 4 and aligned with the outlet 60, a second foliar surface 44 adjacent to the corresponding guide vane 4 and aligned with A turbulent zone 62 at the position of the flap 5, and a transition flow zone 63 between the laminar flow zone 61 and the turbulent zone 62 and aligned with the stop 5 position.

Specifically, in the present embodiment, each of the blocking pieces 5 includes a connecting end 51 connected to the outer end 42 of the corresponding guiding vane 4, and an end 52 opposite to the connecting end 51, wherein each blocking piece 5 The connecting end 51 is integrally connected to the outer end 42 of the corresponding guide vane 4, thereby ensuring There is no gap between the respective flaps 5 and the correspondingly connected guide vanes 4 to prevent fluid from flowing out through the aforementioned gaps.

In addition, each of the blocking pieces 5 further includes a blocking surface 53 formed between the connecting end 51 and the end 52 for blocking fluid, and each blocking surface 53 is connected to the second leaf surface 44 of the corresponding guide vane 4. And an angle A is commonly sandwiched, and the angle A is an obtuse angle, wherein the angle of the angle A can be adjusted according to actual design requirements.

When the motor drives the fluid-pumped low-turbulent flow impeller 200 to rotate in a rotational direction R through the drive shaft, the fluid flows into the fluid-pumped low-turbulent flow impeller 200 via the inlet 33, and the fluid is pumped by the low-turbulent flow impeller 200. The centrifugal force generated causes fluid to flow into each of the flow passages 6. A part of the fluid flowing into the laminar flow region 61 of each flow path 6 flows directly through the outlet 60 in the direction of an arrow D, and a part of the fluid flowing into the turbulent flow zone 62 and the transitional flow zone 63 is blocked by the baffle 5. The face 53 blocks and cannot directly discharge the fluid pumping turbulent flow impeller 200, that is, the counter-rotating vortex V formed by the fluid in the turbulent zone 62 is blocked by the stop surface 53 and cannot be discharged. Thereby, the fluid discharged from the outlet 60 of each flow path 6 is in a state of exhibiting low turbulence, which can greatly reduce the backflow phenomenon of the fluid due to the negative pressure and the cavitation phenomenon caused by the turbulent flow, thereby avoiding the guide vane. 4 damage. Furthermore, the fluid-pumped low-turbulent flow impeller 200 can be increased in rotational speed during operation to increase fluid discharge efficiency.

It should be noted that, in the present embodiment, the length of each of the baffles 5 corresponds to the design of the size of the outlet 60. The size of the outlet 60 is based on the inlet 33 area and the inlet 33 flow rate and the fluid pumping low turbulent flow leaves. The outer diameter of the wheel 200 and the flow rate of the outlet 60 are determined by the ratio of the reduction between the two.

Referring to FIG. 6 and FIG. 7, a second preferred embodiment of the fluid-pumped low-turbulent flow impeller of the present invention is substantially the same as the first preferred embodiment. The difference is that the fluid pumped low turbulent flow impeller 210 further includes a set of rings 50.

In this embodiment, the collar 50 is sleeved and fixed to the first outer peripheral edge 22 of the first base wall 2 and the second outer peripheral edge 32 of the second base wall 3, and the collar 50 is permeable, for example, by welding or screwing. The first outer peripheral edge 22 of the first base wall 2 and the second outer peripheral edge 32 of the second base wall 3 are fixed. The collar 50 includes two spaced apart loops 54, and a plurality of baffles 5 connected between the two loops 54, which are integrally formed between the two loops 54.

Referring to Figures 8 and 9, there is shown a third preferred embodiment of the fluid-pumped low-turbulent flow impeller of the present invention. The overall structure of the fluid-pumped low-turbulent flow impeller 220 is substantially the same as that of the first preferred embodiment. The difference lies in the shape of each of the guide vanes 4.

In the present embodiment, the inner end 41 of each of the guide vanes 4 is slightly tilted, and the fluid-pumped low-turbulent flow impeller 220 is applied to a fluid having a specific gravity of less than 1, such as air.

In summary, the fluid-pumped low-turbulent flow impellers 200, 210, 220 of the embodiments are designed to block the turbulent zone 62 and the transitional flow zone 63 of the flow passage 6 by the respective baffles 5, so that the fluid is only The outlet 60 can flow out through the laminar flow region 61, whereby the fluid discharged from the outlet 60 of each flow passage 6 exhibits a low turbulent flow, which can greatly reduce the backflow of the fluid due to the negative pressure. Image and cavitation caused by turbulence to avoid damage of the guide vanes 4. Furthermore, the fluid-pumped low-turbulent flow impellers 200, 210, 220 can increase their rotational speed during operation to increase the efficiency of fluid discharge, so that the object of the present invention can be achieved.

The above is only the preferred embodiment of the present invention, and the scope of the present invention is not limited thereto, that is, the simple equivalent changes and modifications made by the patent application scope and patent specification content of the present invention, All remain within the scope of the invention patent.

200‧‧‧Fluid-pumped low-turbulence flow impeller

2‧‧‧First base wall

21‧‧‧First inner wall

23‧‧‧Axis joint

4‧‧‧Guide vanes

41‧‧‧Inside

42‧‧‧Outside

43‧‧‧First foliar

44‧‧‧Second leaf

5‧‧‧Block

51‧‧‧Connecting end

End of 52‧‧‧

53‧‧‧stop surface

6‧‧‧ flow path

60‧‧‧Export

61‧‧‧Laminar flow zone

62‧‧‧ Turbulent Zone

63‧‧‧Transitional flow zone

A‧‧‧ angle

D‧‧‧ arrow

R‧‧‧Rotation direction

V‧‧‧ eddy current

Claims (6)

A fluid pumping low turbulent flow impeller comprising: a first base wall comprising a first inner wall surface; and a first outer peripheral edge, a second base wall spaced apart from the first base wall, the second base The wall includes a second inner wall surface facing the first inner wall surface, and a second outer circumference, the second base wall is formed with an inlet, and a plurality of guide vanes are connected to the first inner wall surface and the second inner wall surface The guide vanes are annularly spaced apart from each other, each of the guide vanes including an inner end, an outer end opposite to the inner end, and a first between the inner end and the outer end a leaf surface, and a second leaf surface opposite to the first leaf surface, and a plurality of flaps disposed on the first outer circumference of the first base wall and the second outer circumference of the second base wall, The baffles are spaced apart from each other and together form a ring shape, each baffle being connected to the corresponding outer end of the guide vane, and each of the two adjacent guide vanes and their correspondingly connected baffles are common Defining a first-class track, and defining the flow path between each two adjacent segments An outlet, each flow prop having a laminar flow region adjacent to the corresponding first vane of the guide vane and aligned with the exit position, and a second vane adjacent to the corresponding guide vane A turbulent zone aligned to the position of the flap. The fluid-pumped low-turbulence flow impeller of claim 1, wherein each of the flow passages further has a transition flow zone between the laminar flow zone and the turbulent zone and aligned with the baffle position. The fluid-pumping low-turbulence flow impeller of claim 2, wherein each of the baffles includes a connection end coupled to the outer end of the corresponding guide vane, and an end opposite the connection end. The fluid-pumping low-turbulent flow impeller according to claim 3, wherein each of the blocking pieces further includes a stopping surface formed between the connecting end and the end, and the blocking surface of each of the blocking pieces corresponds to The second leaf surface of the guide vane is connected, and each of the blocking surface and the second leaf surface connected to each other is at an angle which is an obtuse angle. The fluid-pumping low-turbulence flow impeller of claim 4, wherein the baffles are coupled between the first outer periphery of the first base wall and the second outer periphery of the second base wall, each The connecting end of the flap is integrally formed to the corresponding outer end of the guide vane. The fluid pumping low turbulent flow impeller of claim 4, further comprising a ring sleeve sleeved and fixed to the first outer circumference of the first base wall and the second second base wall The outer periphery of the collar includes two spaced apart loops and the flaps, the flaps being coupled between the loops.