CN214617064U - Integrated pipeline pump with high cavitation resistance - Google Patents
Integrated pipeline pump with high cavitation resistance Download PDFInfo
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- CN214617064U CN214617064U CN202022298428.2U CN202022298428U CN214617064U CN 214617064 U CN214617064 U CN 214617064U CN 202022298428 U CN202022298428 U CN 202022298428U CN 214617064 U CN214617064 U CN 214617064U
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- pump
- annular groove
- pump impeller
- inducer
- motor rotor
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Abstract
An embodiment of the utility model provides a high anti cavitation's integration tubing pump, include: the pump comprises a pump shell, wherein a motor stator which is coaxially arranged with the pump shell is arranged on the inner side wall of the pump shell; the hub is coaxially arranged in the pump shell; the pump impeller is rotatably arranged on the hub, a motor rotor is arranged on a rim of the pump impeller, and the motor rotor is arranged corresponding to the motor stator; the inducer is coaxially connected with the pump impeller and is positioned at the upstream of the pump impeller; the utility model discloses not only ensure tubing pump overall structure's compactedness, based on the preliminary pressure boost effect of inducer convection cell moreover for the fluid no longer produces the cavitation when the pump impeller flows through, and carry out the booster pumping again by the pump impeller convection cell, effectively improved tubing pump's anti cavitation erosion performance, can carry out the pumping to the form of going straight out to the fluid.
Description
Technical Field
The utility model relates to a tubing pump technical field especially relates to a high anti cavitation's integration tubing pump.
Background
An axial flow pump is a pump that generates a driving force for a liquid by rotating blades of an impeller and transports the liquid in an axial direction. Traditional axial-flow pump includes the pump casing, pump impeller and the guide vane body of coaxial arrangement, and pump impeller arranges along the rivers direction in the pump casing with the guide vane body in proper order, and pump impeller and guide vane body connect in same root pivot, drive pump impeller's rotation by the pivot to reach the purpose to the rivers pump sending with this. Due to the arrangement limitation of the rotating shaft, the water outlet side of the pump shell is required to be designed into a bent pipe structure, so that the flow of the inlet and the outlet of the axial flow pump is distributed in different directions unless the structures of a water inlet pipe section and a water outlet pipe section which bring considerable loss are further arranged to ensure the conveying direction, and the size of the axial flow pump is further increased.
Cavitation is the phenomenon in which a flowing fluid generates bubbles due to a decrease in local pressure. When the pump generates cavitation, the erosion of the machine parts can be caused at the cavitation part, and further development can cause the reduction of the pump head and the generation of vibration noise and vibration. For the existing axial flow pump, the cavitation erosion resistance of the pump is improved by optimizing the hydraulic design of the axial flow pump, so that the cavitation erosion resistance is limited to a certain extent and is difficult to further improve. In practical use, the driving structure of the transmission shaft adopted by the axial flow pump also causes the complex integral structure, the design is not compact enough, the cavitation resistance is poor, and the wide application of the axial flow pump is severely restricted.
SUMMERY OF THE UTILITY MODEL
An embodiment of the utility model provides an integration tubing pump of high anti cavitation for solve the not compact enough of current axial-flow pump's global design, the relatively poor problem of cavitation resistance.
An embodiment of the utility model provides a high anti cavitation's integration tubing pump, include: the pump comprises a pump shell, wherein a motor stator which is coaxially arranged with the pump shell is arranged on the inner side wall of the pump shell; a hub coaxially mounted within the pump housing; the pump impeller is rotatably arranged on the hub, a motor rotor is arranged on a rim of the pump impeller, and the motor rotor is arranged corresponding to the motor stator; the inducer is coaxially connected with the pump impeller, and the inducer is positioned at the upstream of the pump impeller.
According to the utility model discloses a high anti cavitation's integration tubing pump of embodiment still includes: the rotary supporting piece is rotatably installed on the hub, and the pump impeller and the inducer are installed on the rotary supporting piece simultaneously.
According to the utility model discloses an integrated tubing pump of high anti cavitation, the inducer including set up in last heliciform stator of rotary support piece.
According to the utility model discloses a high anti cavitation's integration tubing pump, be formed with first annular groove on wheel hub's the lateral wall, rotary support piece rotate install in first annular groove.
According to the utility model discloses a high anti cavitation's integration tubing pump, rotary support piece with be provided with support bearing between the tank bottom of first annular groove, the upstream cell wall of first annular groove with be provided with thrust bearing between rotary support piece's the tip.
According to the utility model discloses an integrated tubing pump of high anti cavitation, support bearing includes two, and respectively with the pump impeller reaches the inducer is corresponding.
According to the utility model discloses a high anti cavitation's integration tubing pump, be formed with annular bulge on the upper reaches cell wall of first annular groove, the bellied side of annular form in the notch of first annular groove, opposite side butt thrust bearing.
According to the utility model discloses a high anti cavitation's integration tubing pump, be formed with second annular groove on the inside wall of pump casing, electric motor rotor stretch into to in the second annular groove, place in the motor stator the tank bottom of second annular groove.
According to the utility model discloses a high anti cavitation's integration tubing pump, electric motor rotor keeps away from a side of rim with form first clearance between the motor stator, electric motor rotor's downstream end with be formed with the second clearance between the low reaches cell wall of second annular groove, electric motor rotor's upstream end with be formed with the third clearance between the upstream cell wall of second annular groove, the second clearance first clearance reaches the third clearance communicates in proper order.
According to the utility model discloses a high anti cavitation's integration tubing pump of embodiment still includes: the guide vane body is located at the downstream of the pump impeller, and the hub is connected with the pump shell through the guide vane body.
The embodiment of the utility model provides a pair of high anti cavitation's integration tubing pump, the inducer that drives the upper reaches through the pump impeller rotates, and integrated electric motor rotor on pump impeller's rim, cooperate by the motor stator on electric motor rotor and the pump casing inside wall and constitute driving motor, thereby can be rotatory along wheel hub by driving motor simultaneous drive pump impeller and inducer, not only ensure tubing pump overall structure's compactedness, and based on the preliminary pressure boost effect of inducer to the fluid, make the fluid no longer produce cavitation when flowing through pump impeller, and carry out the booster pumping once more by pump impeller to the fluid, the anti cavitation performance of tubing pump has effectively been improved, can carry out the pumping to the form of fluid with the straight-in outing.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic cross-sectional view of an integrated pipeline pump with high cavitation resistance according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a partial enlarged structure at K1 in fig. 1 according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a partially enlarged structure at K2 in fig. 1 according to an embodiment of the present invention.
In the figure, 1, a pump housing; 2. a hub; 3. a pump impeller; 4. an inducer; 5. a guide blade body; 6. a motor rotor; 7. a motor stator; 8. a rotating support; 9. a first annular groove; 10. a support bearing; 11. a thrust bearing; 12. an annular projection; 13. a second annular groove; 14. a first gap; 15. a second gap; 16. a third gap.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 1, the present embodiment provides an integrated piping pump with high cavitation resistance, including: the pump casing 1 is characterized in that a motor stator 7 which is coaxially arranged with the pump casing 1 is arranged on the inner side wall of the pump casing 1; the hub 2 is coaxially arranged in the pump shell 1; the pump impeller 3 is rotationally arranged on the hub 2, the rim of the pump impeller 3 is provided with a motor rotor 6, and the motor rotor 6 is arranged corresponding to the motor stator 7; the inducer 4, the inducer 4 is coaxially connected to the pump impeller 3, and the inducer 4 is located upstream of the pump impeller 3, wherein the arrow direction in fig. 1 indicates the pumping direction of the fluid in the pump housing 1.
Specifically, the pipeline pump shown in this embodiment, inducer 4 through pump impeller 3 drive upper reaches rotates, and integrated motor rotor 6 on pump impeller 3's rim, cooperate by motor rotor 6 and motor stator 7 on the pump casing 1 inside wall and constitute driving motor, thereby can drive pump impeller 3 and inducer 4 simultaneously by driving motor and rotate along wheel hub 2, not only ensure pipeline pump overall structure's compactness, and based on the preliminary pressure boost effect of inducer 4 to the fluid, make the fluid no longer produce the cavitation when flowing through pump impeller 3, and carry out the booster pumping once more by pump impeller 3 to the fluid, the cavitation erosion resistance performance of pipeline pump has effectively been improved.
It should be noted that, because the motor rotor 6 shown in the present embodiment is integrated on the rim of the pump impeller 3, and the motor rotor 6 and the motor stator 7 on the inner sidewall of the pump housing 1 form the driving motor, the pump impeller 3 in the present embodiment does not need to be provided with a driving rotating shaft coaxially connected with the pump impeller, so that the internal structure of the pipeline pump can be greatly simplified, the compactness of the pump can be improved, and the cavitation erosion resistance of the pump can be enhanced; meanwhile, the pump housing 1 shown in this embodiment may be directly designed as a straight cylinder structure, so that the fluid is pumped by the pump impeller 3 in a straight-in and straight-out manner, and both ends of the pump housing 1 may be respectively connected with the straight pipe sections through flanges, wherein the motor rotor 6 and the motor stator 7 shown in this embodiment are both in an annular structure and are arranged at the same flow direction position in the pump housing 1.
Preferably, in order to ensure the reliability of the synchronous rotation of the pump impeller 3 and the inducer 4, the present embodiment is further provided with a rotary support 8, the rotary support 8 may be a bearing known in the art, the rotary support 8 is rotatably mounted on the hub 2, and the pump impeller 3 and the inducer 4 are simultaneously mounted on the rotary support 8.
As shown in fig. 1, the inducer 4 shown in the present embodiment includes a helical vane provided on the rotary support 8. So, when fluid inhales from the entry side of pump casing 1, because inducer 4 is along with pump impeller 3 synchronous revolution, the fluid of coming flow can be guided to the heliciform stator on the inducer 4, obtains certain pressure promotion back at the fluid, is carried out the pump sending by pump impeller 3 again, and then based on the effect of inducer 4, has effectively improved the cavitation erosion resistance of tubing pump.
As shown in fig. 1 and 2, based on the modification of the above embodiment, a first annular groove 9 is formed on the sidewall of the hub 2 shown in this embodiment, and the rotary support 8 is rotatably mounted in the first annular groove 9. Here, by rotatably mounting the rotary support 8 in the first annular groove 9, on the one hand the rotary support 8 can be positioned by the first annular groove 9, and on the other hand the rotary support 8 can also be prevented from being directly exposed outside the hub 2, resulting in an influence on the flow and pumping of the fluid in the pump housing 1.
As shown in fig. 2, a support bearing 10 is provided between the rotary support member 8 and the groove bottom of the first annular groove 9 in the present embodiment, and the support bearing 10 can provide radial support for the rotary support member 8, prevent large friction loss between the rotary support member 8 and the hub 2, and thereby ensure the normal operation of the pump impeller 3 and the inducer 4.
Meanwhile, since the fluid pressure at the downstream is greater than the fluid pressure at the upstream in the pump housing 1, the present embodiment can prevent the pump impeller 3 from moving toward the upstream by the fluid pressure difference between the upstream and downstream by providing the thrust bearing 11 between the upstream groove wall of the first annular groove 9 and the end of the rotary support member 8 and providing the rotary support member 8 with the thrust bearing 11 in the axial direction.
As shown in fig. 2, preferably, in order to better balance the fluid acting force and provide radial support to the gravity of the rotating support 8, two support bearings 10 are provided in the present embodiment, wherein one support bearing 10 corresponds to the position of the pump impeller 3 in the radial direction, and the other support bearing 10 corresponds to the position of the inducer 4 in the radial direction.
As shown in fig. 2, in order to achieve a better positioning of the thrust bearing 11, the present embodiment forms an annular projection 12 on the upstream groove wall of the first annular groove 9, one side edge of the annular projection 12 is formed in the notch of the first annular groove 9, and the other side edge abuts against the thrust bearing 11.
It should be noted here that, since the support bearing 10 is disposed between the rotary support 8 and the groove bottom of the first annular groove 9, and the thrust bearing 11 is disposed between the upstream groove wall of the first annular groove 9 and the end of the rotary support 8, so that a cooling channel is formed between the rotary support 8 and the first annular groove 9, the fluid pressure difference between the upstream and downstream in the pump housing 1 can be utilized, so that a part of the water flow in the main flow enters from the downstream inlet of the cooling channel and exits from the upstream outlet thereof, and natural water cooling of the support bearing 10 and the thrust bearing 11 is realized during the flow of the water flow in the cooling channel, wherein the support bearing 10 can be a deep groove ball bearing or a water lubricated bearing, and the thrust bearing 11 can be a one-way thrust tapered roller bearing or a one-way thrust cylindrical roller bearing or a water lubricated thrust bearing.
As shown in fig. 1 and fig. 3, in the present embodiment, a second annular groove 13 is formed on an inner sidewall of the pump housing 1, the motor rotor 6 extends into the second annular groove 13, and the motor stator 7 is disposed in a groove bottom of the second annular groove 13. Here, by inserting the motor rotor 6 into the second annular groove 13, it is possible to prevent the motor rotor 6 from disturbing the flow of the mainstream fluid in the pump housing 1, and to facilitate the motor rotor 6 and the motor stator 7 to be well fitted to constitute a driving motor by which the pump impeller 3 is stably driven to rotate around the hub 2.
As shown in fig. 3, in the present embodiment, a first gap 14 is formed between a side surface of the motor rotor 6 away from the rim and the motor stator 7, a second gap 15 is formed between a downstream end of the motor rotor 6 and a downstream groove wall of the second annular groove 13, a third gap 16 is formed between an upstream end of the motor rotor 6 and an upstream groove wall of the second annular groove 13, and the second gap 15, the first gap 14, and the third gap 16 are sequentially communicated.
Specifically, in actual operation, the first gap 14 formed between the motor rotor 6 and the motor stator 7 can prevent friction and collision between the rotating motor rotor 6 and the stationary motor stator 7, and since the second gap 15, the first gap 14 and the third gap 16 are sequentially communicated and form a cooling channel for naturally cooling the motor stator 7 and the motor rotor 6, when the fluid is pumped by the pipeline pump, the pressure of the fluid at the downstream is greater than that of the fluid at the upstream, and under the action of the pressure difference, a part of the water flow in the main flow enters from the inlet of the second gap 15, flows through the first gap 14 between the motor stator 7 and the motor rotor 6, and naturally cools the motor stator 7, and then flows out from the outlet of the third gap 16.
Referring to fig. 1, based on the improvement of the above embodiment, the present embodiment further includes a vane guide 5, the vane guide 5 is located downstream of the pump impeller 3, and the hub 2 is connected to the pump housing 1 through the vane guide 5.
Specifically, the vane guide 5 shown in this embodiment is fixed and located at the outlet side of the pump housing 1, and since the pump housing 1 is fixedly connected to the hub 2 and the pump housing 1, the vane guide 5 serves as a support for supporting the hub 2, so that the vane guide is distributed in the central axial direction of the pump housing 1, and on the other hand, the circumferential velocity of the pump impeller 3 to the main flow is recovered, so as to improve the efficiency of the pipe pump.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. An integrated pipeline pump with high cavitation resistance, which is characterized by comprising:
the pump comprises a pump shell, wherein a motor stator which is coaxially arranged with the pump shell is arranged on the inner side wall of the pump shell;
a hub coaxially mounted within the pump housing;
the pump impeller is rotatably arranged on the hub, a motor rotor is arranged on a rim of the pump impeller, and the motor rotor is arranged corresponding to the motor stator;
the inducer is coaxially connected with the pump impeller and is positioned at the upstream of the pump impeller;
further comprising: the rotating support piece is rotatably arranged on the hub, and the pump impeller and the inducer are simultaneously arranged on the rotating support piece; the inducer comprises a helical vane disposed on the rotating support; the inducer is used for preliminary pressurization before fluid in the pump shell passes through the pump impeller.
2. The integrated piping pump of high cavitation resistance according to claim 1, wherein a first annular groove is formed on a side wall of said hub, and said rotary support is rotatably mounted in said first annular groove.
3. The integrated piping pump of high cavitation resistance according to claim 2, wherein a support bearing is provided between the rotary support and the groove bottom of the first annular groove, and a thrust bearing is provided between the upstream groove wall of the first annular groove and the end of the rotary support.
4. The integrated piping pump of high cavitation resistance according to claim 3, wherein said support bearings comprise two and correspond to said pump impeller and said inducer, respectively.
5. The integrated piping pump of high cavitation resistance according to claim 3, wherein an annular projection is formed on an upstream groove wall of the first annular groove, one side edge of the annular projection being formed in a notch of the first annular groove, and the other side edge abutting against the thrust bearing.
6. The integrated piping pump of any one of claims 1 to 5, wherein a second annular groove is formed on an inner side wall of said pump housing, said motor rotor protrudes into said second annular groove, and said motor stator is built in a groove bottom of said second annular groove.
7. The integrated pipe pump with high cavitation resistance as recited in claim 6, wherein a first gap is formed between a side surface of the motor rotor away from the rim and the motor stator, a second gap is formed between a downstream end of the motor rotor and a downstream groove wall of the second annular groove, a third gap is formed between an upstream end of the motor rotor and an upstream groove wall of the second annular groove, and the second gap, the first gap and the third gap are sequentially communicated.
8. The integrated piping pump of high cavitation resistance according to any one of claims 1 to 5, further comprising: the guide vane body is located at the downstream of the pump impeller, and the hub is connected with the pump shell through the guide vane body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022298428.2U CN214617064U (en) | 2020-10-15 | 2020-10-15 | Integrated pipeline pump with high cavitation resistance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022298428.2U CN214617064U (en) | 2020-10-15 | 2020-10-15 | Integrated pipeline pump with high cavitation resistance |
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| Publication Number | Publication Date |
|---|---|
| CN214617064U true CN214617064U (en) | 2021-11-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202022298428.2U Active CN214617064U (en) | 2020-10-15 | 2020-10-15 | Integrated pipeline pump with high cavitation resistance |
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|---|---|
| CN (1) | CN214617064U (en) |
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2020
- 2020-10-15 CN CN202022298428.2U patent/CN214617064U/en active Active
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