CN210623098U - Multistage axial flow pipeline pump - Google Patents
Multistage axial flow pipeline pump Download PDFInfo
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- CN210623098U CN210623098U CN201921210269.7U CN201921210269U CN210623098U CN 210623098 U CN210623098 U CN 210623098U CN 201921210269 U CN201921210269 U CN 201921210269U CN 210623098 U CN210623098 U CN 210623098U
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- axial flow
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Abstract
The utility model relates to the technical field of axial-flow pumps, and provides a multistage axial-flow pipeline pump, which comprises a pump shell, a pump impeller and a guide vane body which are coaxially arranged, wherein the inner side of the pump shell is provided with a wheel hub which is arranged along the central axis of the pump shell, and the wheel hub is connected with the pump shell through the guide vane body; the hub is provided with a multistage pump impeller in a rotating way along the axial direction; a motor rotor is arranged on the rim of the pump impeller, and a motor stator corresponding to the motor rotor is arranged on the side wall of the pump shell; the utility model discloses compact structure has ensured that the liquid that transports passes in and out along the equidirectional, has realized the independent regulation to each stage pump impeller rotational speed for the interval of axial compressor tubing pump high efficiency work obtains broadening widely, has reached the requirement of large-traffic and big lift of axial compressor tubing pump when the fluid pumping.
Description
Technical Field
The utility model relates to an axial-flow pump technical field especially relates to a multistage axial-flow tubing pump.
Background
An axial flow pump is a pump that transports liquid by the force of the rotating impeller blades on the liquid. The axial-flow pump is structurally characterized by comprising a pump shell, a pump impeller and a guide vane body which are coaxially arranged, wherein the pump impeller and the guide vane body are arranged along the water flow direction in the pump shell, the pump impeller and the guide vane body are connected to the same rotating shaft, the rotating shaft drives the pump impeller to rotate, the pumping purpose of water flow is achieved, the rotating shaft is arranged to lead the water outlet side of the pump shell to be set into an elbow structure, the inlet and outlet flow of the axial-flow pump is not in the same direction, unless the water inlet pipe section and the water outlet pipe section which bring considerable loss are further arranged, the conveying direction is guaranteed, and the size of the axial-flow pump is further increased.
Compared with impeller pumps in two forms of a centrifugal pump and a mixed flow pump, the axial flow pump has the characteristics of large flow and small lift, and has important application prospects in occasions with large flow requirements, such as south-to-north water transfer engineering and the like. When the high-flow liquid transportation environment needs to provide higher lift, a common method is to apply a multi-stage axial-flow pump, provide a certain lift through each stage of impeller, and obtain higher lift by connecting in series.
However, in order to obtain a higher lift, the conventional multistage axial flow pump has a longer size requirement in the flow direction, and the application thereof may be restricted in the application context of limited space; in addition, all the impellers of the traditional multistage axial-flow pump share the same rotating shaft, and all the impellers can only rotate at the same rotating speed in the same direction, so that the operation condition of the traditional axial-flow pump can be adjusted only by adjusting the single rotating speed, and the rotating speed adjustable range of the traditional multistage axial-flow pump is smaller and the high-efficiency working interval is narrower.
Disclosure of Invention
Technical problem to be solved
The utility model aims at providing a multistage axial compressor tubing pump for there is the rotational speed mode single in solving traditional multistage axial-flow pump, and the narrower problem of high efficiency work interval.
(II) technical scheme
In order to solve the technical problem, the utility model provides a multistage axial flow pipeline pump, including coaxial pump casing, pump impeller and the guide vane body of arranging, the inboard of pump casing is equipped with the wheel hub of arranging along its axis, be connected through the guide vane body between wheel hub and the pump casing; the hub is provided with a plurality of stages of pump impellers along the axial direction;
the pump impeller is characterized in that a motor rotor is arranged on a rim of the pump impeller, and a motor stator corresponding to the motor rotor is arranged on the side wall of the pump shell.
Preferably, in the present invention, the water inlet end and the water outlet end of the pump housing are correspondingly provided with one guide vane body;
each stage of the pump impeller is positioned between the two guide vane bodies, and the rotation directions of the adjacent two stages of the pump impellers are opposite.
Preferably, in the utility model discloses in at different levels pump impeller turn to the same, adjacent two-stage it is equipped with one to correspond between the pump impeller the guide vane body.
Preferably, in the present invention, the motor stator is disposed in the side wall of the pump housing, and an annular opening corresponding to the motor stator is disposed on the inner side wall of the pump housing;
the motor rotor extends into the annular opening, and a first cooling channel is formed between the motor rotor and the two side walls of the annular opening and between the motor rotor and the motor stator.
Preferably, the pump impeller in the utility model comprises a rotating sleeve and impeller blades, wherein the impeller blades are circumferentially and uniformly distributed along the outer side wall of the rotating sleeve;
the rotating sleeve is rotatably arranged on the hub; the motor rotor is mounted on the rim of each impeller blade.
Preferably, in the utility model discloses in the last annular groove of having seted up of wheel hub, it installs to rotate the cover in the annular groove.
Preferably, in the utility model, a support bearing is arranged between the bottom of the annular groove and the inner side wall of the rotating sleeve;
a thrust bearing is arranged between the wall of the annular groove facing the water inlet side of the pump shell and the end part of the rotating sleeve;
and a second cooling channel is formed between the rotating sleeve and the two groove walls and the groove bottom of the annular groove.
Preferably, in the utility model discloses in the annular groove orientation still be equipped with the spacing limit of annular on the cell wall of pump casing side of intaking, the spacing limit of annular is established the notch department of annular groove, and right thrust bearing carries out the backstop spacing.
(III) technical effects
The utility model provides a multistage axial compressor tubing pump, through setting up the rotatory multistage pump impeller along fixed wheel hub, and every stage pump impeller all makes rotary motion under the magnetic field force effect between the motor stator of corresponding level and the electric motor rotor, thereby can realize the independent regulation to the rotational speed of each stage pump impeller, it is single rotational speed regulation mode for traditional multistage axial flow pump, but the adjustable parameter obtains greatly increased, and when the pump impeller of a certain level appears flowing when worsening, can be through adjusting the rotational speed of its upper reaches or low reaches pump impeller, with control global flow field, thereby make the interval of axial compressor tubing pump high efficiency work obtain widening widely; meanwhile, the impellers of the multi-stage pump work simultaneously, and the requirements of the axial flow pipeline pump on large flow and large lift during fluid pumping are met.
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 sectional structure view of a first multi-stage axial flow pipeline pump according to an embodiment of the present invention;
fig. 2 is a schematic sectional structure view of a second multi-stage axial flow pipeline pump according to an embodiment of the present invention;
FIG. 3 is an enlarged partial view of FIG. 1 at K1;
fig. 4 is a partially enlarged schematic view of a part K2 in fig. 1.
In the figure: 1-a pump shell, 2-a pump impeller, 201-a rotating sleeve, 202-an impeller blade, 3-a guide vane body, 4-a hub, 5-a motor rotor, 6-a motor stator, 7-an annular opening, 8-a first cooling channel, 9-an annular groove, 10-a support bearing, 11-a thrust bearing, 12-a second cooling channel and 13-an annular limiting edge.
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 in the present invention, all other embodiments obtained by a person skilled 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. 1-2, the present embodiment provides a multi-stage axial-flow pipeline pump, including a pump housing 1, a pump impeller 2 and a vane guide body 3, which are coaxially arranged, wherein a hub 4 arranged along a central axis of the pump housing 1 is disposed inside the pump housing 1, and the hub 4 is connected with the pump housing 1 through the vane guide body 3; the hub 4 is provided with a multistage pump impeller 2 in an axial rotating way; the rim of the pump impeller 2 is provided with a motor rotor 5, and the side wall of the pump shell 1 is provided with a motor stator 6 corresponding to the motor rotor 5, wherein the motor rotor 5 and the motor stator 6 are both in a cylindrical structure.
As can be seen from the structure shown in fig. 1-2, a stationary hub 4 arranged along the central axis of the pump housing 1 is provided, a multi-stage pump impeller 2 arranged along the main flow direction (indicated by the arrow) of the fluid is rotatably mounted on the hub 4, and each stage of pump impeller 2 performs a rotational motion under the action of the magnetic field force between the motor stator 6 and the motor rotor 5 of the corresponding stage, so that the rotational speed of each stage of pump impeller 2 can be independently adjusted, and each stage of pump impeller 2 can correspondingly achieve the effect of pumping the water flow, so that the axial flow pipeline pump shown in this embodiment has greatly increased adjustable parameters compared with the conventional single rotational speed adjusting mode of the multi-stage axial flow pump, and can adjust the rotational speed of the upstream or downstream pump impeller 2 when the flow of the pump impeller 2 of a certain stage is deteriorated, so as to control the global flow field, and further greatly widen the interval of the high-efficiency work of the axial flow pipeline pump. In addition, the axial-flow pipeline pump shown in the embodiment also meets the requirements of large flow and large lift when the fluid is pumped by simultaneously working the multi-stage pump impellers.
Further, referring to fig. 1, in the present embodiment, a guide vane body 3 is correspondingly disposed at the water inlet end and the water outlet end of the pump housing 1; the pump impellers 2 of each stage are positioned between the two guide vane bodies 3, and the rotation directions of the pump impellers 2 of the two adjacent stages are opposite.
Specifically, in the axial-flow pipeline pump shown in this embodiment, the adjacent two-stage pump impeller 2 is designed to be in a contra-rotating operating state, in actual operation, the pump impeller 2 can be directly arranged according to the first-stage forward rotation, the second-stage reverse rotation and the third-stage forward rotation in the main flow direction in the pump housing 1, all the pump impellers 2 are arranged in this order, no guide vane body needs to be added between the adjacent two-stage pump impeller 2, only the guide vane body 3 needs to be arranged at the downstream of the last-stage pump impeller 2, and the final circulation is recovered, wherein the guide vane body 3 is arranged at the water inlet end of the pump housing 1, which is beneficial to providing prerotation for the pump impeller 2 at the water inlet end of the pump housing 1.
Because the rotation directions of the two adjacent stages of pump impellers 2 are opposite, the pump impeller 2 positively rotating at the upper stage can provide positive circumferential speed, and the pump impeller 2 reversely rotating at the lower stage has the functions of the guide vane bodies 3 and the pump impeller 2, so that on one hand, the ring volume provided by the pump impeller 2 at the previous stage can be recovered, the pressure of transported fluid is increased, on the other hand, the circumferential speed in the reverse direction can be further provided, the total pressure of the fluid is further increased, and the operation is carried out in sequence, and therefore the multi-stage pressurization effect of the transported fluid can be realized without the guide vane bodies 3.
Therefore, compared with the conventional multistage axial flow pump in which the impeller of the multistage pump is driven to rotate by the same rotating shaft, the multistage axial flow pipeline driven by the electromagnetism shown in the embodiment not only realizes that the pump housing 1 is designed into a straight-through structure convenient for liquid to directly enter and exit, but also greatly reduces the distance between the adjacent two stages of pump impellers 2. Therefore, the axial flow pipeline pump shown in the embodiment is more compact in structure, smaller in size in the flow direction and wider in application range.
Further, referring to fig. 2, in the present embodiment, the pump impellers 2 at each stage have the same rotation direction, and a guide vane body 3 is correspondingly disposed between two adjacent pump impellers 2.
Specifically, in the axial-flow pipeline pump shown in this embodiment, in order to realize multi-stage supercharging, in terms of structural design, a first-stage pump impeller, a first-stage guide vane body, a second-stage pump impeller, and a second-stage guide vane body are adopted, and the pump impeller 2 and the guide vane body 3 of each stage are sequentially arranged in this order.
Thus, the pump impeller 2 of each stage provides a circumferential velocity (i.e., a circulation volume) to the fluid, thereby increasing the kinetic energy of the fluid, and then recovers the circulation volume of the pump impeller 2 of the stage through the pump guide vanes downstream of the stage, and provides a flow angle required for rotation of the pump impeller 2 of the next stage and support for the hub 4. Therefore, under the sequential action of the multistage pump impeller 2 and the guide vane body 3, the pressure of the fluid is increased step by step, and the overall pressure of the fluid pumped from the water outlet end of the pump shell 1 is greatly improved.
Further, referring to fig. 3, in the present embodiment, the motor stator 6 is disposed in the side wall of the pump housing 1, and an annular opening 7 is disposed on the inner side wall of the pump housing 1 and corresponding to the motor stator 6; the motor rotor 5 of each stage of pump impeller 2 extends into the annular opening 7 corresponding to the motor stator 6 of the corresponding stage, and a first cooling channel 8 is formed between the motor rotor 5 and two side walls of the annular opening 7 and between the motor stator 6.
Specifically, when the axial flow pipeline pump pumps fluid in the pump housing 1 step by step, 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 downstream inlet of the first cooling channel 8, flows between the motor stator 6 and the motor rotor 5, naturally cools the motor stator 6, and finally flows out from the upstream outlet of the first cooling channel 8. In this way, during operation of the pump impeller 2 of each stage, the motor stator 6 of the stage corresponding thereto can be cooled by the water flow naturally flowing in the corresponding first cooling channel 8.
Further, in the present embodiment, the pump impeller 2 includes a rotating sleeve 201 and impeller blades 202, and the impeller blades 202 are uniformly distributed along the outer side wall of the rotating sleeve 201 in a circumferential manner, so as to ensure the stability of the rotation of the pump impeller 2 on the hub 4, and avoid the problem of center of gravity shift; the rotating sleeve 201 is rotatably mounted on the hub 4; the motor rotor 5 is mounted on the rim of each impeller blade 202.
Further, in order to prevent the axial movement of the pump impeller 2 during the rotation of the hub 4, the hub 4 is provided with an annular groove 9, and the rotating sleeve 201 is rotatably mounted in the annular groove 9.
Further, referring to fig. 4, in the present embodiment, a support bearing 10 is provided between the groove bottom of the annular groove 9 and the inner side wall of the rotating sleeve 201 to prevent a large frictional loss from occurring between the rotating sleeve 201 and the hub 4 of the pump impeller 2 during rotation, and thereby ensure the normal operation of the pump impeller 2.
Meanwhile, since the fluid pressure at the downstream is higher than the fluid pressure at the upstream in the pump housing 1, the pump impeller 2 can be effectively prevented from moving toward the upstream under the action of the fluid pressure difference between the upstream and downstream by providing the thrust bearing 11 between the groove wall of the annular groove 9 toward the water inlet side of the pump housing 1 and the end of the rotating sleeve 201.
In addition, by providing the second cooling channel 12 between the rotating sleeve 201 and the two groove walls and the groove bottom of the 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 main flow enters from the downstream inlet of the second cooling channel 12 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 main flow in the second cooling channel 12, wherein it should be noted herein that 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 bearing.
Further, in this embodiment, an annular limiting edge 13 is further disposed on a wall of the annular groove 9 facing the water inlet side of the pump housing 1, and the annular limiting edge 13 is disposed at a notch of the annular groove 9 and limits the thrust bearing 11 by stopping, thereby further ensuring the stability of the rotation of the pump impeller 2.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (8)
1. A multi-stage axial flow pipeline pump comprises a pump shell, a pump impeller and a guide vane body which are coaxially arranged, and is characterized in that a hub arranged along the central axis of the pump shell is arranged on the inner side of the pump shell, and the hub and the pump shell are connected through the guide vane body;
the hub is provided with a plurality of stages of pump impellers in a rotating way along the axial direction of the hub;
the pump impeller is characterized in that a motor rotor is arranged on a rim of the pump impeller, and a motor stator corresponding to the motor rotor is arranged on the side wall of the pump shell.
2. The multi-stage axial flow duct pump of claim 1,
the water inlet end and the water outlet end of the pump shell are correspondingly provided with the guide vane body;
each stage of the pump impeller is positioned between the two guide vane bodies, and the rotation directions of the adjacent two stages of the pump impellers are opposite.
3. The multi-stage axial flow duct pump of claim 1,
the rotation directions of the pump impellers of all levels are the same, and one guide vane body is correspondingly arranged between the adjacent pump impellers of two levels.
4. The multi-stage axial flow tube pump according to any one of claims 1 to 3, wherein the motor stator is disposed in a side wall of the pump housing, and an annular opening disposed corresponding to the motor stator is provided on an inner side wall of the pump housing;
the motor rotor extends into the annular opening, and a first cooling channel is formed between the motor rotor and the two side walls of the annular opening and between the motor rotor and the motor stator.
5. The multistage axial flow pipeline pump according to any one of claims 1 to 3, wherein the pump impeller includes a rotating sleeve and impeller blades which are circumferentially and uniformly distributed along an outer side wall of the rotating sleeve;
the rotating sleeve is rotatably arranged on the hub; the motor rotor is mounted on the rim of each impeller blade.
6. The multi-stage axial flow duct pump of claim 5, wherein said hub defines an annular groove therein, said rotating sleeve being rotatably mounted in said annular groove.
7. The multi-stage axial flow duct pump of claim 6,
a supporting bearing is arranged between the groove bottom of the annular groove and the inner side wall of the rotating sleeve;
a thrust bearing is arranged between the wall of the annular groove facing the water inlet side of the pump shell and the end part of the rotating sleeve;
and a second cooling channel is formed between the rotating sleeve and the two groove walls and the groove bottom of the annular groove.
8. The multistage axial flow tube pump according to claim 7, wherein a wall of the annular groove facing the water inlet side of the pump housing is further provided with an annular limiting edge, and the annular limiting edge is provided at a notch of the annular groove and performs a stop limit on the thrust bearing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921210269.7U CN210623098U (en) | 2019-07-30 | 2019-07-30 | Multistage axial flow pipeline pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921210269.7U CN210623098U (en) | 2019-07-30 | 2019-07-30 | Multistage axial flow pipeline pump |
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| Publication Number | Publication Date |
|---|---|
| CN210623098U true CN210623098U (en) | 2020-05-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921210269.7U Expired - Fee Related CN210623098U (en) | 2019-07-30 | 2019-07-30 | Multistage axial flow pipeline pump |
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| CN (1) | CN210623098U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110296086A (en) * | 2019-07-30 | 2019-10-01 | 中国船舶重工集团公司第七一九研究所 | A kind of multistage axial flow pipeline pump |
| CN112177943A (en) * | 2020-10-15 | 2021-01-05 | 武汉第二船舶设计研究所(中国船舶重工集团公司第七一九研究所) | Integrated pipeline pump supported by wheel rim |
| CN112177944A (en) * | 2020-10-15 | 2021-01-05 | 武汉第二船舶设计研究所(中国船舶重工集团公司第七一九研究所) | Integrated pipeline pump with high cavitation resistance |
| CN112228355A (en) * | 2020-10-15 | 2021-01-15 | 武汉第二船舶设计研究所(中国船舶重工集团公司第七一九研究所) | An integrated pipeline pump with wide and high efficiency area |
-
2019
- 2019-07-30 CN CN201921210269.7U patent/CN210623098U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110296086A (en) * | 2019-07-30 | 2019-10-01 | 中国船舶重工集团公司第七一九研究所 | A kind of multistage axial flow pipeline pump |
| CN112177943A (en) * | 2020-10-15 | 2021-01-05 | 武汉第二船舶设计研究所(中国船舶重工集团公司第七一九研究所) | Integrated pipeline pump supported by wheel rim |
| CN112177944A (en) * | 2020-10-15 | 2021-01-05 | 武汉第二船舶设计研究所(中国船舶重工集团公司第七一九研究所) | Integrated pipeline pump with high cavitation resistance |
| CN112228355A (en) * | 2020-10-15 | 2021-01-15 | 武汉第二船舶设计研究所(中国船舶重工集团公司第七一九研究所) | An integrated pipeline pump with wide and high efficiency area |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200526 Termination date: 20210730 |
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| CF01 | Termination of patent right due to non-payment of annual fee |