CN204061305U - Fluid Pump Low Turbulence Flow Impeller - Google Patents

Abstract

A fluid pumping low turbulence impeller comprises a first base wall, a second base wall, a plurality of guide vanes and a plurality of baffle plates, wherein the second base wall is provided with an inlet, each two adjacent guide vanes and the corresponding connected baffle plates thereof jointly define a flow channel, an outlet of the flow channel is defined between each two adjacent baffle plates, each flow channel is provided with a laminar flow area aligned with the outlet, a turbulent flow area aligned with the baffle plates and a transitional flow area aligned with the baffle plates, and by means of the design mode that the baffle plates block the turbulent flow area and the transitional flow area, the fluid can only flow out of the outlet through the laminar flow region, so that the fluid discharged from the outlet of each flow passage is in a low-turbulence state, the backflow phenomenon of the fluid caused by negative pressure and the cavitation phenomenon caused by turbulence can be greatly reduced, and the rotating speed of the fluid pumping low-turbulence impeller can be improved when the fluid pumping low-turbulence impeller operates so as to increase the efficiency of discharging the fluid.

Description

Fluid Pump Low Turbulence Flow Impeller

technical field

The utility model relates to a pump impeller, in particular to a centrifugal fluid pump low-turbulence flow impeller.

Background technique

1 and 2, the general centrifugal pump impeller 1 usually 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 between the first base wall 11 and the first base wall 11. The vanes 13 between the second base walls 12 . An inlet 121 is formed at the center of the second base wall 12 for fluid to flow in. The blades 13 are annular and arranged at intervals, each blade 13 has a first blade surface 131, and a second blade surface 132 opposite to the first blade surface 131, the first blades of every two adjacent blades 13 The surface 131 and the second blade surface 132 jointly define a flow channel 14 for the fluid to flow out. The thickness of each blade 13 is uniform, and the width of each flow channel 14 gradually widens from the inside toward the outer periphery of the pump impeller 1. .

When the motor drives the pump impeller 1 to rotate along a rotation direction R through the transmission shaft, the fluid flows into the pump impeller 1 through the inlet 121 , and then flows out through an outlet 140 of each channel 14 due to centrifugal force. Since the width of each flow channel 14 gradually widens from the inside toward the outer periphery of the pump impeller 1, each flow channel 14 has a laminar flow region 141 adjacent to the first blade surface 131, and a laminar flow region 141 adjacent to the second blade surface 132. The turbulent flow zone 142 and a transitional flow zone 143 located between the laminar flow zone 141 and the turbulent flow zone 142 , the laminar flow zone 141 , the turbulent flow zone 142 and the transitional flow zone 143 correspond to the outlet 140 at the same time. When fluid flows into each channel 14, part of the fluid will flow out through the laminar flow region 141 along the direction of an arrow D, while part of the fluid will first form a counter-rotating vortex V in the turbulent flow region 142 and then flow out through the outlet 140, so that The fluid flowing out of the outlet 140 will form a state of high turbulence. In this way, the fluid will flow back due to the negative pressure, and then cavitation is likely to occur, resulting in damage to the blade 13 . If the rotation speed of the pump impeller 1 increases, the aforementioned phenomenon becomes more serious, so the rotation speed of the existing pump impeller 1 cannot be increased during operation, so the fluid discharge efficiency is poor.

Contents of the invention

The main purpose of this utility model is to provide a low-turbulence flow impeller for fluid pumps. The fluid flowing out through the outlets of each flow channel is in a low-turbulence state, which can greatly reduce the cavitation phenomenon caused by turbulence. Therefore, energy consumption can be reduced to improve fluid discharge efficiency.

The purpose of the utility model and the solution to the background technical problems are achieved by adopting the following technical solutions. According to the utility model, the fluid pump low-turbulence flow impeller includes a first base wall, a second base wall, and a plurality of guides Flow blade, the first base wall includes a first inner wall surface, and a first outer peripheral edge, the second base wall is spaced from the first base wall, and the second base wall includes a wall facing the first inner wall surface The second inner wall surface and a second outer peripheral edge, the second base wall forms an inlet, the guide vane is connected between the first inner wall surface and the second inner wall surface, and the guide vane is annular Arranged at intervals from each other, each guide vane includes an inner end, an outer end opposite to the inner end, a first vane surface between the inner end and the outer end, and a first vane opposite to the first vane The second leaf surface of the surface.

The fluid pump low turbulence impeller also includes a plurality of baffles, the baffles are arranged on the first outer peripheral edge of the first base wall and the second outer peripheral edge of the second base wall, and the baffles are mutually Arranged at intervals and jointly form a ring shape, each of the baffles is connected to the outer end of the corresponding guide vane, and every two adjacent guide vanes and their corresponding connected baffles jointly define a flow channel, and an outlet of the flow channel is defined between every two adjacent baffles, and each of the flow channels has a side adjacent to the first blade surface of the corresponding guide vane and aligned at the outlet position a laminar flow area, and a turbulent flow area adjacent to the second blade surface of the corresponding guide vane and aligned with the position of the baffle.

Each of the flow channels also has a transitional flow area located between the laminar flow area and the turbulent flow area and aligned with the position of the baffle.

Each of the baffles includes a connection end connected with the outer end of the corresponding guide vane, and an end opposite to the connection end.

Each of the baffles also includes a stop surface formed between the connecting end and the end, the stop surface of each baffle is connected to the second blade surface of the corresponding guide vane, each of the baffles An included angle is formed between the stop surface and the connected second blade surface, and the included angle is an obtuse angle.

The baffle 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 baffle is integrally connected to the corresponding guide the outboard end of the blade.

The fluid pump low turbulence flow impeller also includes a collar, which is sheathed and fixed on the first outer peripheral edge of the first base wall and the second outer peripheral edge of the second base wall, and the collar includes two There are spaced apart rings and the blocking piece, and the blocking piece is connected between the two rings.

The beneficial effect of the utility model is that: by means of the turbulent flow area and the transitional flow area of the flow channel blocked by each baffle, the fluid can only flow out of the outlet through the laminar flow area, thereby, the outlet of each flow channel is discharged The fluid is in a state of low turbulence, which can greatly reduce the backflow phenomenon caused by negative pressure and the cavitation phenomenon caused by turbulent flow, so as to avoid damage to the guide vanes. Furthermore, the rotational speed of the low-turbulence impeller of the fluid pump can be increased during operation, so as to increase the efficiency of fluid discharge.

Description of drawings

Fig. 1 is a partial sectional perspective view of an existing centrifugal pump impeller;

Fig. 2 is a front view sectional schematic diagram of an existing centrifugal pump impeller, illustrating the flow mode of fluid;

Fig. 3 is a partial sectional perspective view of the first preferred embodiment of the low-turbulence flow impeller of the fluid pump of the present invention, illustrating the connection relationship between the first base wall, the second base wall, guide vanes and baffles;

Fig. 4 is a side view sectional schematic diagram of the first preferred embodiment of the low turbulent flow impeller of the fluid pump of the present invention;

Fig. 5 is a front view sectional schematic diagram of the first preferred embodiment of the low-turbulence flow impeller of the fluid pump of the present invention, illustrating that part of the fluid in the laminar flow region of the inflow channel will flow out from the outlet, and flow into the turbulent flow region and Part of the fluid in the transition flow area will be blocked by the blocking surface of the baffle;

Fig. 6 is a partial sectional perspective view of the second preferred embodiment of the low-turbulence flow impeller of the fluid pump of the present invention, illustrating that the collar is sleeved and fixed on the first outer peripheral edge of the first base wall and the second base wall of the second base wall. Two outer peripheral edges, and the collar has a ring and a stopper;

Fig. 7 is the front sectional schematic diagram of the second preferred embodiment of the low turbulent flow impeller of the fluid pump of the utility model, illustrating that part of the fluid in the laminar flow region of the inflow channel will flow out from the outlet, and flow into the turbulent flow region and Part of the fluid in the transition flow area will be blocked by the blocking surface of the baffle;

Fig. 8 is a perspective view of the third preferred embodiment of the low-turbulence flow impeller of the fluid pump of the present invention; and

Fig. 9 is a schematic front sectional view of the third preferred embodiment of the low-turbulence flow impeller of the fluid pump of the present invention.

Detailed ways

Below in conjunction with accompanying drawing and embodiment the utility model is described in detail.

Referring to Fig. 3, it is the first preferred embodiment of the low turbulent flow impeller of the fluid pump of the present invention, the low turbulent flow impeller 200 of the fluid pump is arranged in a housing (not shown) of the centrifugal pump, The motor of the centrifugal pump drives the low turbulence flow impeller 200 of the fluid pump to rotate through a transmission shaft (not shown).

Referring to FIG. 3 , FIG. 4 and FIG. 5 , the fluid pump low-turbulence flow impeller 200 includes a first base wall 2 , a second base wall 3 , a plurality of guide vanes 4 , and a plurality of baffles 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 connection portion 23 is disposed at the center of the first base wall 2 , and the shaft connection portion 23 is used for connecting to a transmission shaft and being driven by a motor to rotate. The second base wall 3 is spaced apart from the first base wall 2 and is parallel to each other. The second base wall 3 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 base wall 3 forms an inlet 33 for a fluid such as air or water to flow in. 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 from each other, each The guide vane 4 is arc-shaped and includes an inner end 41, an outer end 42 opposite to the inner end 41, a first blade surface 43 between the inner end 41 and the outer end 42, and a first blade surface opposite to the first blade. The second blade surface 44 of the surface 43 .

The blocking piece 5 is arranged 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 this embodiment, the blocking piece 5 is 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 blocking pieces 5 are spaced apart from each other and together form a ring shape. Each baffle 5 is connected to the outer end 42 of the corresponding guide vane 4 for blocking fluid. Every two adjacent guide vanes 4 and their corresponding connecting baffles 5 jointly define a flow channel 6 , and an outlet 60 of the flow channel 6 is defined between every two adjacent baffles 5 . Each flow channel 6 has a laminar flow region 61 adjacent to the first blade surface 43 of the corresponding guide vane 4 and aligned with the outlet 60, a second blade surface 44 adjacent to the corresponding guide vane 4 and aligned with the A turbulent flow area 62 at the position of the baffle 5 , and a transitional flow area 63 located between the laminar flow area 61 and the turbulent flow area 62 and aligned with the baffle 5 .

Specifically, in this embodiment, each baffle 5 includes a connection end 51 connected to the outer end 42 of the corresponding guide vane 4, and a terminal 52 opposite to the connection end 51, wherein each baffle 5 The connecting end 51 is integrally connected to the outer end 42 of the corresponding guide vane 4, thereby ensuring that there will be no gap between each baffle plate 5 and the correspondingly connected guide vane 4, so as to prevent the fluid from passing through the aforementioned The gap flows out.

In addition, each blocking piece 5 also includes a blocking surface 53 formed between the connection end 51 and the end 52 to block fluid, and each blocking surface 53 is connected to the second blade surface 44 of the corresponding guide vane 4 And jointly form an included angle A, the included angle A is an obtuse angle, wherein, the size of the included angle A can be adjusted according to actual design requirements.

When the motor drives the fluid pump low turbulence impeller 200 to rotate along a rotation direction R through the transmission shaft, the fluid will flow into the fluid pump low turbulence impeller 200 through the inlet 33, and the fluid pump low turbulence impeller 200 rotates by means of the fluid pump. The generated centrifugal force makes the fluid flow into each flow channel 6 . Part of the fluid flowing into the laminar flow region 61 of each channel 6 will flow out directly along the direction of an arrow D through the outlet 60, and part of the fluid flowing into the turbulent flow region 62 and the transition flow region 63 will be blocked by the baffle 5 The surface 53 prevents the fluid from being directly discharged out of the pump low-turbulence flow impeller 200 , that is to say, the counter-rotating vortex V formed by the fluid in the turbulent flow region 62 is blocked by the blocking surface 53 and cannot be discharged. In this way, the fluid discharged from the outlet 60 of each flow channel 6 is in a state of low turbulence, which can greatly reduce the backflow phenomenon caused by negative pressure and the cavitation phenomenon caused by turbulent flow, so as to avoid the flow of guide vanes 4 damage. Furthermore, the rotational speed of the fluid pump low-turbulence flow impeller 200 can be increased during operation, so as to increase the efficiency of fluid discharge.

It should be noted that, in this embodiment, the length of each baffle 5 corresponds to the design of the area of the outlet 60, and the size of the area of the outlet 60 is based on the area of the inlet 33, the flow rate of the inlet 33, and the low-turbulence flow impeller 200 of the fluid pump. Outer diameter and outlet 60 flow rate, the reduction ratio formed by the ratio of the two is determined.

Referring to Fig. 6 and Fig. 7, it is the second preferred embodiment of the fluid pump low turbulent flow impeller 210 of the utility model. Same, except that the fluid pump low turbulence flow impeller 210 also includes a collar 50 .

In this embodiment, the collar 50 is sleeved and fixed between 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 can be locked by, for example, welding or screws. It is 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 in a manner. The collar 50 includes two spaced rings 54 , and a plurality of blocking pieces 5 connected between the two rings 54 , and the blocking pieces 5 are integrally connected between the two rings 54 .

Referring to Fig. 8 and Fig. 9, it is the third preferred embodiment of the fluid pump low turbulent flow impeller of the present invention, the overall structure and operation mode of the fluid pump low turbulent flow impeller 220 are roughly the same as those of the first preferred embodiment The same example, the difference lies in the shape of each guide vane 4 .

In this embodiment, the inner end 41 of each guide vane 4 is slightly tilted, and the fluid pump low-turbulence flow impeller 220 is applied to a fluid with a specific gravity less than 1, such as air.

To sum up the above, the fluid pump low-turbulence flow impellers 200, 210, 220 of the various embodiments are designed in such a way that the turbulent flow area 62 and the transition flow area 63 of the flow channel 6 are blocked by each baffle plate 5, so that the fluid can only pass through The laminar flow zone 61 flows out of the outlet 60, whereby the fluid discharged from the outlet 60 of each flow channel 6 is in a state of low turbulence, which can greatly reduce the backflow phenomenon of fluid caused by negative pressure and the cavitation caused by turbulence Phenomenon, to avoid damage to the guide vane 4. Furthermore, the rotational speed of the low-turbulence flow impellers 200, 210, 220 of the fluid pump can be increased during operation to increase the efficiency of fluid discharge, which can indeed achieve the purpose of the utility model.

Claims (6)

1. the low disorderly flow impellers of fluid pumping, comprise one first basal wall, one second basal wall, and number of guide vanes, this first basal wall comprises one first internal face, and one first outer periphery, this second basal wall and this first basal wall are separately, this second basal wall comprises one towards the second internal face of this first internal face, and one second outer periphery, this second basal wall is formed with an entrance, described guide vane is connected between this first internal face and this second internal face, described guide vane is arrangement spaced apart annularly, respectively this guide vane comprises a medial extremity, one in contrast to the outboard end of this medial extremity, one the first blade face between this medial extremity and this outboard end, and one in contrast to second blade face on this first blade face, it is characterized in that:

The low disorderly flow impellers of this fluid pumping also comprises multi-disc catch, described catch is arranged at these first outer periphery of this first basal wall and these second outer periphery of this second basal wall, the arrangement spaced apart of described catch also forms a ring-shaped jointly, respectively this catch is connected to this outboard end of this corresponding guide vane, every two adjoining these guide vanes and corresponding this catch connected thereof define a runner jointly, and between every two adjoining these catch, define an outlet of this runner, respectively this runner has one and is adjacent to this first blade face of this corresponding guide vane and is aligned in the laminar region of this exit position, and one is adjacent to this second blade face of this corresponding guide vane and is aligned in the turbulent region of this catch position.

2. the low disorderly flow impellers of fluid pumping according to claim 1, is characterized in that: respectively this runner also has one between this laminar region and this turbulent region and is aligned in the transition flow region of this catch position.

3. the low disorderly flow impellers of fluid pumping according to claim 2, is characterized in that: respectively this catch comprises a connecting end connected with this outboard end of this corresponding guide vane, and one in contrast to the end of this connecting end.

4. the low disorderly flow impellers of fluid pumping according to claim 3, it is characterized in that: respectively this catch also comprises one and is formed at stopping surface between this connecting end and this end, respectively this stopping surface of this catch is connected with this second blade face of this corresponding guide vane, respectively press from both sides an angle between this stopping surface and this second blade face be connected, this angle is an obtuse angle.

5. the low disorderly flow impellers of fluid pumping according to claim 4, it is characterized in that: described catch is connected between these first outer periphery of this first basal wall and these second outer periphery of this second basal wall, respectively this connecting end of this catch is connected to this outboard end of this corresponding guide vane one-body moldedly.

6. the low disorderly flow impellers of fluid pumping according to claim 4, it is characterized in that: also comprise a collar, this collar is sheathed and be fixed on these first outer periphery of this first basal wall and these second outer periphery of this second basal wall, this collar comprises two rings separately and described catch, and described catch is connected between this two ring.