CN218817016U

CN218817016U - Downdraft axial-flow pump

Info

Publication number: CN218817016U
Application number: CN202122599602.1U
Authority: CN
Inventors: 金可友
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-04-24
Filing date: 2021-10-27
Publication date: 2023-04-07
Anticipated expiration: 2031-10-27

Abstract

The utility model belongs to the technical field of fluid transportation equipment, in particular to a downdraft axial-flow pump, which comprises a pump shell, a motor, an impeller and a plurality of guide vanes, wherein the lower end of the pump shell is provided with a liquid inlet, the upper end of the pump shell is provided with a liquid outlet, and a liquid channel is formed between the liquid inlet and the liquid outlet; the motor is arranged in the pump shell and is provided with a motor shell connected with the pump shell and a motor shaft extending out of the bottom of the motor shell; the impeller is arranged at the extending end of the motor shaft and is positioned above the liquid inlet; a plurality of vanes are disposed in the fluid passageway above the impeller. Specifically, the vanes are circumferentially and evenly distributed between the motor and pump casings. Consider from the direction at motor shaft place, traditional axial-flow pump, the mounted position of stator and impeller need be reserved to the end that stretches out at the motor shaft, and the utility model discloses only need reserve the mounted position of impeller can, reduced the height of axial-flow pump like this and simplified the mounting means, greatly reduced the weight of product, the person of facilitating the use transport and operation.

Description

Downdraft axial-flow pump

Technical Field

The utility model belongs to the technical field of fluid transportation equipment, refer in particular to a downdraft axial-flow pump.

Background

At present, a plurality of water pumps with downdraft structures are available, such as sewage pumps, downdraft deep well pumps and the like. Because the liquid inlet of the downdraft water pump is arranged below the water pump, the downdraft water pump has the characteristic of draining accumulated water to the maximum extent. Therefore, the water-proof and movable pipe rack has more and more applications in flood fighting and water-proof, movable pipe rack and other occasions.

The existing downdraft water pump structure is basically a centrifugal impeller volute structure, and has high lift and low flow. For example, the mining downdraft water pump with the authorization notice No. CN2526552Y comprises a motor part, a check valve, a backflow tank body, a water pump body, a water inlet joint and the like, and the product is very inconvenient to maintain and carry due to the complex structure, large volume and heavy weight.

In addition, due to the structural limitation of the centrifugal pump, the flow of the water pump is low, and the requirements of irrigation and drainage rush repair and other occasions cannot be met.

Disclosure of Invention

The utility model aims at providing a downdraft axial-flow pump that simple structure, small, light in weight, flow are big.

The purpose of the utility model is realized like this:

a downdraft axial flow pump comprising:

the pump shell is provided with a liquid inlet at the lower end and a liquid outlet at the upper end, and a liquid channel is formed between the liquid inlet and the liquid outlet;

the motor is arranged in the pump shell and is provided with a motor shell connected with the pump shell and a motor shaft extending out of the bottom of the motor shell, and the impeller is arranged at the extending end of the motor shaft and is positioned above the liquid inlet; and

and the guide vanes are arranged in the fluid channel above the impeller and used for guiding the liquid.

The utility model discloses further be provided with, stator circumference and evenly distributed are in between motor casing and the pump case.

The utility model is further provided with that the pump shell is provided with an upper shell body provided with the liquid outlet, a guide vane body used for connecting the guide vane and a lower shell body provided with the liquid inlet in sequence, and the lower shell body is sleeved outside the impeller;

the motor casing comprises an upper end cover, a motor cylinder and a lower end cover, and the upper end cover, the motor cylinder and the lower end cover form a motor inner cavity;

wherein the guide vane is arranged between the guide vane body and the motor barrel.

The utility model discloses further be provided with, the connected mode of stator and guide vane body and the connected mode of stator and motor casing do: integrally formed or welded or fastened.

The utility model discloses further be provided with, be provided with cable installation passageway between motor barrel and the guide vane body.

The utility model discloses be provided with further, the motor casing is still including sealed lid, form sealed chamber between lower extreme cover and the sealed lid, sealed intracavity is provided with mechanical seal structure, the motor shaft passes and connects the impeller behind sealed chamber and the mechanical seal structure.

The utility model discloses be provided with further, the lower extreme of the guide vane body extends the shaping and has the ring flange, the upper end of casing is rolled over outward and is formed the installation limit down, and the installation limit passes through the fix with screw on the ring flange.

The utility model discloses further be provided with, the pump case is still including filtering the screen panel, should filter the screen panel parcel and be in the inlet is outside, and connect and be in on the ring flange.

The utility model discloses be provided with further, the up end height of the guide vane body is less than the up end of motor jar, the lower terminal surface height of the guide vane body is higher than the lower terminal surface of sealed lid.

Compared with the prior art, the utility model outstanding and profitable technological effect is:

1. the utility model discloses an axial-flow type water pump has overcome the not enough shortcoming of current centrifugal water pump flow, greatly increased liquid channel's size, can satisfy user's demand with bigger rated flow. Simultaneously, the motor sets up in liquid passage, can carry out cooling with the help of liquid, improves the cooling effect of motor, guarantees the normal work of motor, also helps installing more powerful motor simultaneously.

2. The utility model discloses a stator setting is in between the stator body and the motor section of thick bamboo, from the direction consideration at motor shaft place, traditional axial-flow pump, the mounted position of stator and impeller need be reserved to the end that stretches out at the motor shaft, and the utility model discloses only need reserve the mounted position of impeller can, reduced the axial-flow pump like this highly and simplified the mounting means, greatly reduced the weight of product, the person of facilitating the use transport and operation.

3. The utility model discloses a lower casing directly links to each other with the guide vane body, has saved the intermediate junction part for simple structure, dismouting easy maintenance has further reduced the volume, has reduced weight, and it is more suitable for carrying.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is one of the schematic views of the installation structures of the guide vane and the guide vane body of the present invention.

Fig. 3 is a second schematic view of the installation structure of the guide vane and the guide vane body of the present invention.

The reference numerals in the figures denote the meanings:

1-a pump casing; 2, a motor; 3-an impeller; 4-guide vanes; 5-a cable installation channel;

11-a liquid inlet; 12-a liquid outlet; 13-a liquid channel; 14-an upper shell; 15-a guide vane body; 16-a lower housing; 17-a flange plate; 18-a filter screen;

21-motor casing; 211-upper end cap; 212-motor barrel; 213-lower end cap; 214-a sealing cover; 22-motor shaft; 23-a mechanical seal structure; 24-a first oil hole; 25-second oil hole.

Detailed Description

The invention will be further described with reference to specific embodiments below:

the first embodiment is as follows:

as shown in fig. 1, a downdraft axial flow pump includes a pump housing 1, a motor 2, an impeller 3, and a plurality of guide vanes 4.

A liquid inlet 11 is arranged at the lower end of the pump shell 1, a liquid outlet 12 is arranged at the upper end of the pump shell, and a liquid channel 13 is formed between the liquid inlet 11 and the liquid outlet 12. The motor 2 is installed inside the pump housing 1 and has a motor housing 21 connected to the pump housing 1 and a motor shaft 22 protruding from the bottom of the motor housing 21. The impeller 3 is installed at the extending end of the motor shaft 22, and the impeller 3 is positioned above the liquid inlet 11. A number of guide vanes 4 are arranged in the fluid channel above the impeller 3 for guiding the liquid.

Specifically, the pump casing 1 sequentially has an upper casing 14 provided with the liquid outlet 12, a guide vane body 15 for connecting the guide vane 4, and a lower casing 16 provided with the liquid inlet 11, and the lower casing 16 is sleeved outside the impeller 3 and forms a liquid pumping structure. The upper housing 14 and the vane guide body 15 may be formed by welding or may be formed integrally.

The motor casing 21 includes an upper end cover 211, a motor barrel 212 and a lower end cover 213, the upper end cover 211, the motor barrel 212 and the lower end cover 213 form a motor inner cavity, and a stator mounted on the inner wall of the motor barrel 212 and a rotor arranged on the motor shaft 22 are arranged in the motor inner cavity. And a second oil filling hole 25 used for filling heat conduction oil into the motor is arranged above the upper end cover 211, a second plugging screw is arranged on the second oil filling hole 25, and a second O-shaped ring is arranged on the joint end surface of the second plugging screw and the upper end cover 211 and used for sealing. The upper cover 211 and the lower cover 213 are provided with plane bearings to which the motor shaft 22 is attached, respectively.

The motor 2 drive impeller 3 of this embodiment rotates, carries out the drawing of liquid, then exports liquid from liquid outlet 12 through stator 4, because the motor sets up in liquid passage 13, consequently, at the motor 2 during operation, the work production of motor 2 heat can be taken away to liquid, ensures motor 2's normal work.

As shown in fig. 2 to 3, the guide vanes 4 are circumferentially and uniformly distributed between the motor casing 21 and the pump casing 1. Specifically, the guide vane 4 is disposed between the guide vane body 15 and the motor barrel 212, and functions to fixedly connect the guide vane body 15 and the motor barrel 212. The guide vane 4 is an arc-shaped guide vane, and because the liquid entering the impeller moves spirally, the guide vane 4 is used for changing the spirally-moved liquid into axial movement, so that the energy loss in the liquid transportation process can be reduced. In addition, the connection mode of the guide vane 4 and the guide vane body 15 and the connection mode of the guide vane 4 and the motor casing 21 can be integrally formed or welded or connected by fasteners.

Considering from the direction that the motor shaft is located, traditional axial-flow pump, the mounted position of stator and impeller need be reserved to the end that stretches out at the motor shaft, and motor casing, stator and impeller arrange in proper order on the motor shaft promptly, and this embodiment, only need reserve impeller 3 the mounted position can, reduced axial-flow pump's axial height like this and simplified the mounting means, greatly reduced the weight of product, convenience of customers transport and operation.

Preferably, the motor housing 21 further comprises a tapered sealing cover 214, the tapered outer surface of which can guide the fluid into the liquid channel 13. A sealing cavity is formed between the lower end cover 213 and the sealing cover 214, a mechanical sealing structure 23 is arranged in the sealing cavity, and the motor shaft 22 passes through the sealing cavity and the mechanical sealing structure 23 and then is connected with the impeller 3. The sealing cavity can effectively prevent liquid from entering the inner cavity of the motor, and the sealing performance is ensured. In order to reduce the abrasion of the mechanical sealing structure 23, lubricating oil is filled in the sealing cavity, a first oil filling hole is formed in the sealing cover 214, and a first blocking screw is arranged in the first oil filling hole 24. And a first O-shaped ring is arranged on the combined end surface of the first blocking screw and the sealing cover 214. In addition, the sealing caps 214 are respectively provided with a rotary bearing to which the motor shaft 22 is mounted.

Preferably, the lower end of the guide vane body 15 is extended and formed with a flange 17, which are integrally formed, so as to simplify the connection structure therebetween. The upper end of the lower shell 16 is turned outwards to form a mounting edge, and the mounting edge is fixed on the flange 17 through screws.

In addition, the pump shell 1 further comprises a filter screen 18 for preventing impurities from entering, and the filter screen 18 is wrapped outside the liquid inlet 11 and is also connected to the flange 17. In addition, the filter screen 18 is a metal screen, which needs to support the weight of the whole product, and a liquid inlet height difference is arranged between the lower end surface of the metal screen and the liquid inlet 11, so that the impeller 3 can conveniently absorb liquid. The filter screen cover 18 and the lower shell 16 of the embodiment are connected to the flange 17 at the same time, so that a connecting structure can be simplified, and the assembly efficiency is improved.

In this embodiment, the upper end surface of the guide blade body 15 is lower than the upper end surface of the motor barrel 212, and the lower end surface of the guide blade body 15 is higher than the lower end surface of the sealing cover 214. That is, the guide vane body 15 and the guide vane are mounted not only exclusively on the axial length of the axial flow pump, but also on the other hand, the volume and weight of the product can be further reduced.

Preferably, a cable mounting channel 5 for mounting an electrical cable is provided between the motor barrel 212 and the guide vane body 15. In this embodiment, the cable installation channel 5 is formed by an annular installation column, which is fixed on the sidewall of the motor barrel 212 after passing through the liquid channel 13 from the outside of the guide vane body 15, and is not communicated with the liquid channel 13, and is directly communicated with the inner cavity of the motor and the outside.

Example two:

the structure of this embodiment is basically the same as that of the first embodiment, and the difference is that: the guide vanes are replaced by a plurality of connecting strips, and the function of fixedly connecting the pump shell 1 and the motor barrel 212 is achieved.

The connection mode of the two ends of the connecting strip can be integrally formed or welded or connected by fasteners.

The above-mentioned embodiment is only the preferred embodiment of the present invention, and does not limit the protection scope of the present invention according to this, so: all equivalent changes made according to the structure, shape and principle of the utility model should be covered within the protection scope of the utility model.

Claims

1. A downdraft axial flow pump, comprising:

the liquid pump comprises a pump shell (1), a liquid inlet (11) is formed in the lower end of the pump shell, a liquid outlet (12) is formed in the upper end of the pump shell, and a liquid channel (13) is formed between the liquid inlet (11) and the liquid outlet (12);

the motor (2) is arranged in the pump shell (1) and is provided with a motor shell (21) connected with the pump shell (1) and a motor shaft (22) extending out of the bottom of the motor shell (21);

the impeller (3) is arranged at the extending end of the motor shaft (22) and is positioned above the liquid inlet (11); and

a number of guide vanes (4) arranged in the fluid channel above the impeller (3) for liquid guiding;

wherein the guide vanes (4) are circumferentially and uniformly distributed between the motor casing (21) and the pump casing (1).

2. The downdraft axial flow pump according to claim 1, wherein the pump housing (1) has an upper housing (14) provided with the liquid outlet (12), a guide vane body (15) for connecting the guide vane (4), and a lower housing (16) provided with the liquid inlet (11) in this order, and the lower housing (16) is sleeved on the outer side of the impeller (3);

the motor shell (21) comprises an upper end cover (211), a motor cylinder (212) and a lower end cover (213), and the upper end cover (211), the motor cylinder (212) and the lower end cover (213) form a motor inner cavity;

wherein the guide vane (4) is arranged between the guide vane body (15) and the motor barrel (212).

3. A downdraft axial flow pump according to claim 2, wherein: the connection mode of stator blade (4) and stator blade body (15) and the connection mode of stator blade (4) and motor casing (21) do: integrally formed or welded or fastened.

4. A downdraft axial flow pump according to claim 3, wherein: a cable installation channel (5) is arranged between the motor barrel (212) and the guide vane body (15).

5. A downdraft axial flow pump according to claim 2, wherein: the motor shell (21) further comprises a conical sealing cover (214), a sealing cavity is formed between the lower end cover (213) and the sealing cover (214), a mechanical sealing structure (23) is arranged in the sealing cavity, and the motor shaft (22) penetrates through the sealing cavity and the mechanical sealing structure (23) and then is connected with the impeller (3).

6. A downdraft axial flow pump according to claim 5, wherein: the lower end of the guide vane body (15) is extended and formed with a flange (17), the upper end of the lower shell (16) is turned outwards to form a mounting edge, and the mounting edge is fixed on the flange (17) through screws.

7. A downdraft axial flow pump according to claim 6, wherein: the pump shell (1) further comprises a filter screen (18), and the filter screen (18) is wrapped outside the liquid inlet (11) and connected to the flange (17).

8. A downdraft axial flow pump according to claim 7, wherein: the height of the upper end face of the guide vane body (15) is lower than that of the upper end face of the motor barrel (212), and the height of the lower end face of the guide vane body (15) is higher than that of the lower end face of the sealing cover (214).