CN110701061A

CN110701061A - Multistage tubular pump device with novel structure

Info

Publication number: CN110701061A
Application number: CN201911171716.7A
Authority: CN
Inventors: 石丽建; 朱军; 袁尧; 汤方平; 尚晓君; 焦海峰; 杨帆
Original assignee: Yangzhou University
Current assignee: Yangzhou University
Priority date: 2019-11-26
Filing date: 2019-11-26
Publication date: 2020-01-17

Abstract

The utility model provides a multistage tubular pump device of novel structure, belong to hydraulic engineering equipment technical field, water guide cone formula structure as an organic whole before the impeller, reserve the keyway in wheel hub, the key is connected with the hub, it is fixed with impeller and preceding water guide cone, impeller wheel hub department reserves the blade mounting hole, it is fixed with blade root and wheel hub with the counter bore bolt, arrange the guide vane body at impeller play water position, the rivers are through first impeller, kinetic energy increases, the rivers circulation of first impeller export is retrieved to the guide vane body, change the flow state of the rivers of second impeller import department simultaneously, make the rivers kinetic energy of flowing through the second impeller further increase, lift and efficiency have been showing and have been improved, the rivers circulation is retrieved to last second guide vane body, eliminate some rivers complementary energy, thereby improve pumping unit's efficiency and lift. The blade and the rotor do not need to be welded, the angle of the blade is adjusted, the influence of clearance backflow on a flow field is reduced, the influence of friction torque on the performance of the pump device is reduced, and the efficiency and the lift of the pump device are effectively improved.

Description

Multistage tubular pump device with novel structure

Technical Field

The invention belongs to the technical field of hydraulic engineering equipment, relates to a tubular pump device, and particularly relates to a multistage tubular pump device with a novel structure.

Background

At present, the axial flow pump is widely applied to agricultural irrigation, drainage, water transfer and other projects due to the characteristics of large flow, low lift and the like. The full through-flow pump is a novel motor pump combining a submersible motor and a through-flow technology, and has the characteristics of large flow, low lift, small hydraulic loss, compact structure, convenience in installation and the like. The principle of the full tubular pump is that an impeller is arranged in an inner cavity of a motor rotor, blades are welded with the motor rotor to be a part of the rotor, the impeller is driven to rotate under the electromagnetic action between a motor stator and the rotor, water flows through the inner cavity of the rotor, a certain gap exists between the rotor and the stator, the gap is filled with water, large friction loss of a wheel disc is generated, torque is increased, and efficiency is reduced; and under the effect of impeller import pressure, can form the clearance backward flow from impeller export to impeller import, influence the indoor flow field of impeller to cause the loss of water conservancy, the reduction of efficiency and lift, this also is the problem that needs to solve at present urgently.

Disclosure of Invention

The invention aims to provide a multistage tubular pump device with a novel structure aiming at the defects of the existing full tubular pump in the using process.

The technical scheme of the invention is as follows: a multi-stage tubular pump device with a novel structure comprises a pump shell and a shaft arranged inside the pump shell; the method is characterized in that: the tubular pump device is also formed by connecting a hub, an impeller, a guide vane body, a bearing, a rotor, a stator and a water guide cone; the rotor forms circumference through rotor lock nut and axle and is connected fixedly, it is fixed that the rotor passes through bearing and axle formation circumference, the stator is fixed to be set up on stator shell's inner wall, the stator cover is put the outside of rotor forms the clearance with the rotor, be equipped with support piece between stator shell and the pump housing, the left side of stator, rotor is equipped with wheel hub, wheel hub passes through the bearing and connects the setting epaxially, be equipped with first guide vane body between wheel hub and the pump housing, be equipped with first impeller on the left wheel hub of first guide vane body, the left side of first impeller is equipped with preceding water guide cone, the right side of rotor and stator is equipped with the second impeller, the right side of second impeller is equipped with the second guide vane body, the right side of second guide vane body is connected and is equipped with back water guide cone.

The rotor is connected and fixed with a shaft through two rotor locking nuts, the number of each rotor locking nut is 6, the rotor locking nuts are uniformly distributed on the outer circle of the shaft, the left side and the right side of the rotor are respectively provided with a bearing, and the bearings are fixed through clamping rings.

The quantity of support piece is 6, and the interval evenly sets up between stator shell and pump housing, and support piece is the straight board, is equipped with the wire hole on one of them support piece.

The first guide vane body is provided with 7 guide vanes, the guide vanes are fixed outside the hub, 4 bearings connected with the shaft are arranged inside the hub, and the bearings are fixed in an axial positioning mode through positioning steps on the right side and clamping rings on the left side.

First impeller and preceding water cone set up in the left side of first guide vane body, and first impeller and preceding water cone formula structure as an organic whole, impeller wheel hub department leaves the blade mounting hole, is equipped with 3 fixed orificess on the mounting hole circumference, and the impeller diameter is 350mm, and the wheel hub ratio is 0.4, and the quantity of blade is 4 on the impeller, and the blade carries out blade angle modulation and fixes through the fixed orifices.

The second impeller and the first impeller are identical in structural size.

The stator forms the support through the bearing, is equipped with 2mm clearance between stator and the rotor.

The second guide blade body and the rear water guide cone are of an integrated structure, and the structural form of the second guide blade body is the same as that of the first guide blade body.

The invention has the beneficial effects that: the invention provides a multistage tubular pump device with a novel structure, which is provided with two auxiliary impellers, wherein a water guide cone in front of an impeller is of an integrated structure, a key groove is reserved in a hub, a key is connected with a shaft, the impeller and the front water guide cone are fixed, a blade mounting hole is reserved at the hub of the impeller, the root of the blade is fixed with the hub by a counter bore bolt, a guide blade body is arranged at the water outlet part of the impeller, water flows through a first impeller, kinetic energy is increased, the guide blade body recovers the water circulation quantity at the outlet of the first impeller, and simultaneously the flow state of water flow at the inlet of a second impeller is changed, so that the water flow energy flowing through the second impeller is further increased, the lift and the efficiency are remarkably improved, and finally the second guide blade body recovers the water circulation quantity, eliminates a part of water flow complementary energy, thereby improving the efficiency and. Compared with the traditional tubular pump structure, the tubular pump structure has the advantages that the blades and the rotor do not need to be welded, the angle of the blades can be adjusted, the structure is compact, the influence of clearance backflow on a flow field is reduced, the influence of friction torque on the performance of the pump device is reduced, and the efficiency and the lift of the pump device are effectively improved.

Drawings

FIG. 1 is a schematic view of the overall construction of a tubular pump according to the present invention.

FIG. 2 is a schematic view of a pump shaft structure according to the present invention.

Fig. 3 is a schematic sectional view at a-a in fig. 1.

FIG. 4 is a schematic cross-sectional view at B-B in FIG. 1.

In the figure: the pump comprises a pump shell 1, a hub 2, a first impeller 3, a first guide vane body 4, a bearing 5, a rotor locking nut 6, a support member 7, a stator 8, a wire outlet hole 9, a rotor 10, a second impeller 11, a second guide vane body 12, a shaft 13, a key groove 14, a front guide water cone 15, a rear guide water cone 16, a flange 17, a clamping ring 18, an external thread 19, a mounting hole 20 and a fixing hole 21.

Detailed Description

The invention will be further described with reference to the accompanying drawings in which:

as shown in fig. 1, a multistage tubular pump device with a novel structure comprises a pump housing 1 and a shaft 13 arranged inside the pump housing 1, wherein the tubular pump device is formed by connecting a hub 2, an impeller, a guide vane body, a bearing 5, a rotor 10, a stator 8 and a water guide cone; rotor 10 forms circumference through rotor lock nut 6 and axle 13 and is connected fixedly, rotor 10 forms circumference fixedly through bearing 10 and axle 13, stator 8 is fixed to be set up on stator housing's inner wall, stator 8 cover is put in rotor 10's the outside and is formed the clearance with rotor 10, be equipped with support piece 7 between stator housing and the pump casing 1, stator 8, rotor 10's left side is equipped with wheel hub 2, wheel hub 2 passes through bearing 5 and connects the setting on axle 13, be equipped with first guide vane body 4 between wheel hub 2 and the pump casing 1, be equipped with first impeller 3 on the left wheel hub 2 of first guide vane body 4, the left side of first impeller 3 is equipped with preceding water guide cone 15, rotor 10 is equipped with second impeller 11 with stator 8's right side, the right side of second impeller 11 is equipped with second guide vane body 12, the right side connection of second guide vane body 12 is equipped with back water guide cone 16.

As shown in fig. 1, a multistage tubular pump device with a novel structure is characterized in that a rotor 10 is fixedly connected with a shaft 13 through two rotor locking nuts 6, the number of each rotor locking nut 6 is 6, the rotor locking nuts 6 are uniformly distributed on the outer circle of the shaft 13, a bearing is respectively arranged on the left side and the right side of the rotor 10, and the bearings are fixed through clamping rings; the number of the supporting pieces 7 is 6, the supporting pieces 7 are uniformly arranged between the stator shell and the pump shell 1 at intervals, the supporting pieces 7 are straight plates, and one of the supporting pieces 7 is provided with a wire outlet hole 9; the first guide vane body 4 is provided with 7 guide vanes which are fixed outside the

hub

2, 4 bearings 5 connected with a shaft are arranged inside the hub 2, and the bearings 5 are axially positioned and fixed through a positioning step on the right side and a clamping ring 5 on the left side; the first impeller 3 and the front water guide cone 15 are arranged on the left side of the first guide vane body 4, the first impeller 3 and the front water guide cone 15 are of an integrated structure, a vane mounting hole 20 is reserved at the hub of the impeller, 3 fixing holes 21 are formed in the circumference of the mounting hole 20, the diameter of the impeller is 350mm, the hub ratio is 0.4, the number of vanes on the impeller is 4, and the vanes are subjected to vane angle adjustment and are fixed through the fixing holes 21; the second impeller 11 and the first impeller 3 have the same structure and size; the stator 8 forms a support through a bearing, and a 2mm gap is formed between the stator 8 and the rotor 10; the second guide vane body 12 and the rear water guide cone 16 are of an integrated structure, and the structural style of the integrated structure is the same as that of the first guide vane body 4.

As shown in FIG. 1, the working principle of the multistage tubular pump device with a novel structure is as follows: the invention fixes a rotor and a shaft through bolts, 6 bolts are arranged in one circle for two circles, 12 bolts are arranged in the two circles, a stator is arranged in a hub and corresponds to the rotor, the distance between the stator and the rotor is 2mm, winding coils are arranged on two sides of the stator, the stator is supported in the hub through bearings on two sides, and the bearings are locked through clamping rings. The stator and the rotor are arranged in the hub, and the rotor and the bearing are driven to rotate together under the electromagnetic action between the stator and the rotor; the outer part of the hub at the positions of the stator and the rotor is connected with a supporting piece, the supporting piece is 6 straight plates which play a role in fixing and supporting, and a wire outlet hole is reserved on the supporting piece, so that the device is convenient to electrify; the whole motor part is fixed with the first guide vane body and the second impeller by flanges. The installation of rotor and stator has got rid of the influence of the clearance backward flow between stator and rotor to water pump performance to and because the rotor disc friction torque that the clearance backward flow increases, improved pump device's efficiency greatly, avoided the welding of impeller rim and rotor, can realize the regulation of blade angle, also make the further compactness of structure simultaneously, the installation of being convenient for is dismantled.

The device is a two-stage water pump, wherein a pair of impellers is provided with 4 blades, the two pairs of impellers are arranged together, the diameter of the impeller is 350mm, the hub ratio is 0.4, the first impeller and the front water guide cone are integrated, a key groove is reserved in the hub, a key is connected with a shaft, and the impeller and the front water guide cone are fixed; a blade mounting hole is reserved at the impeller hub, the root of the blade is fixed with the hub by a counter bore screw and a positioning pin, a first guide blade body is arranged at the water outlet part of the first impeller, and the speed circulation of water flow at the outlet of the impeller is recovered; the second impeller is arranged behind the motor and connected with the shaft through threads, and the blades of the second impeller are installed the same as the blades of the first impeller and are also provided with second guide vanes. When the motor is electrified to work, the motor rotor drives the shaft to rotate together, and then the first impeller and the second impeller are driven to rotate through the biting force between the key groove and the threads. The two-stage axial flow pump is configured, so that the running lift of the pump station can be effectively improved, and the pump station can be applied to a high-lift and high-flow water pumping pump station.

The water pump blade adjusting mode in the device adopts a semi-adjusting mode, the impeller blade shaft is embedded into the mounting hole of the hub, the root of the blade leans against the positioning step in front of the mounting hole, three bolt holes are reserved in the mounting hole and are fixed in the hub body through bolts and positioning pins, and the blade angle can be adjusted by only dismounting the positioning pins and the screws.

Guide vane bodies are arranged behind the two auxiliary impellers in the device, bent guide vanes matched with the impellers are selected for the guide vanes, the number of the guide vanes is 7, the diameter of the guide vanes is 350mm, and the hub ratio is 0.4. The inside echelonment that sets up of first guide vane body wheel hub makes things convenient for the installation and the fixed of bearing, has arranged 4 bearings in it, and the bearing links to each other with the axle for the guide vane body does not rotate along with the axle together, and at bearing department one side with the snap ring, the opposite side sets up the location step, thereby fixes the bearing effectively. The second guide vane body has the same structure as the first guide vane body, and is integrated with the rear water guide cone. The rivers pass through first impeller, and kinetic energy increases, and the rivers circulation volume of first impeller export is retrieved to first guide vane body, changes the flow state of second impeller import department rivers simultaneously for the rivers kinetic energy of second impeller of flowing through further increases, and lift and efficiency have been showing and have been improved, and the rivers circulation volume is retrieved to last second guide vane body, eliminates partly rivers complementary energy, thereby improves pump unit's efficiency and lift. The units are connected through flanges, and rubber pads are arranged between the flanges to guarantee the sealing performance of the device, so that the units are convenient to install and maintain.

Claims

1. A multi-stage tubular pump device with a novel structure comprises a pump shell (1) and a shaft (13) arranged inside the pump shell (1); the method is characterized in that: the tubular pump device is also formed by connecting a hub (2), an impeller, a guide vane body, a bearing (5), a rotor (10), a stator (8) and a water guide cone; the rotor (10) forms circumferential connection with the shaft (13) through a rotor locking nut (6) and is fixed, the rotor (10) forms circumferential connection with the shaft (13) through a bearing (10) and is fixed, the stator (8) is fixedly arranged on the inner wall of the stator shell, the stator (8) is sleeved on the outer side of the rotor (10) and forms a gap with the rotor (10), a supporting piece (7) is arranged between the stator shell and the pump shell (1), the left sides of the stator (8) and the rotor (10) are provided with a hub (2), the hub (2) is connected and arranged on the shaft (13) through a bearing (5), a first guide vane body (4) is arranged between the hub (2) and the pump shell (1), a first impeller (3) is arranged on the left side of the first guide vane body (4), a front water guide cone (15) is arranged on the left side of the first impeller (3), the right sides of the rotor (10) and the stator (8) are provided with a second impeller (11), the right side of the second impeller (11) is provided with a second guide vane body (12), and the right side of the second guide vane body (12) is connected with a rear water guide cone (16).

2. The multistage tubular pump device with a novel structure as claimed in claim 1, wherein: the rotor (10) is connected and fixed with the shaft (13) through two rotor locking nuts (6), the number of each rotor locking nut (6) is 6, the rotor locking nuts (6) are uniformly distributed on the outer circle of the shaft (13), the left side and the right side of the rotor (10) are respectively provided with a bearing, and the bearings are fixed through clamping rings.

3. The multistage tubular pump device with a novel structure as claimed in claim 1, wherein: the number of the supporting pieces (7) is 6, the supporting pieces are evenly arranged between the stator shell and the pump shell (1) at intervals, the supporting pieces (7) are straight plates, and one of the supporting pieces (7) is provided with a wire outlet hole (9).

4. The multistage tubular pump device with a novel structure as claimed in claim 1, wherein: be equipped with 7 stator vanes on first guide vane body (4), the stator vane is fixed in wheel hub (2) outside, and wheel hub (2) inside is equipped with 4 bearings (5) with the hub connection, and bearing (5) carry out axial positioning fixedly through location step on right side and left snap ring (5).

5. The multistage tubular pump device with a novel structure as claimed in claim 1, wherein: first impeller (3) and preceding water guide cone (15) set up in the left side of first guide vane body (4), first impeller (3) and preceding water guide cone (15) formula structure as an organic whole, and impeller wheel hub department leaves blade mounting hole (20), is equipped with 3 fixed orificess (21) on mounting hole (20) circumference, and the impeller diameter is 350mm, and the wheel hub ratio is 0.4, and the quantity of blade is 4 on the impeller, and the blade carries out blade angle modulation and fixes through fixed orificess (21).

6. The multistage tubular pump device with a novel structure as claimed in claim 1, wherein: the second impeller (11) and the first impeller (3) are identical in structural size.

7. The multistage tubular pump device with a novel structure as claimed in claim 1, wherein: the stator (8) forms a support through a bearing, and a 2mm gap is formed between the stator (8) and the rotor (10).

8. The multistage tubular pump device with a novel structure as claimed in claim 1, wherein: the second guide vane body (12) and the rear water guide cone (16) are of an integrated structure, and the structural form of the second guide vane body is the same as that of the first guide vane body (4).