CN217055605U - Novel vertical centrifugal pump - Google Patents

Abstract

The utility model provides a novel vertical centrifugal pump relates to centrifugal pump technical field, and this novel vertical centrifugal pump includes: the pump comprises an outer shell, an inner shell accommodated in the outer shell, a pump shaft penetrating through the inner shell, a power source arranged at the top of the outer shell, a multistage impeller arranged in the inner shell and arranged on the pump shaft, a guide vane arranged on the inner shell and matched with the impeller, and a support structure arranged at the periphery of the pump shaft between the power source and the impeller; wherein, the bottom of the outer shell is provided with an external water inlet and an external water outlet; the top of the inner shell is provided with an inner water inlet, and the bottom of the inner shell is provided with an inner water outlet; a water inlet channel for communicating an external water inlet with an internal water inlet is formed between the inner shell and the outer shell; the inner water outlet is communicated with the outer water outlet; the power source is in power connection with the pump shaft to drive the pump shaft to rotate; the sealing device is safer and more reliable in sealing and has prolonged service life.

Description

Novel vertical centrifugal pump

Technical Field

The application relates to the technical field of centrifugal pumps, in particular to a novel vertical centrifugal pump.

Background

The structure of all the prior clear water multistage vertical centrifugal pumps adopts a traditional structure concept, the flow direction of the liquid to be sent is generally adopted as the lower part for water inlet, and after pressurization, the upper part for water outlet or the lower part for water outlet after the water outlet is turned by a shell. For example, chinese patent CN201611027447.3 discloses a multistage centrifugal pump, which adopts the similar structure, and the mechanical seal between the motor and the multistage impeller 4 is under the action of high-pressure water for a long time. Referring specifically to fig. 1, in the prior art, a vertical multistage centrifugal pump motor 1 is arranged at the top, the pressure of fluid is increased after the fluid is pressurized by the action of an impeller, a high-pressure cavity is formed above a multistage impeller 4, and a mechanical sealing structure is arranged between the high-pressure cavity and the motor. The mechanical seal always needs to be kept sealed at the outlet end of the pump, and the outlet end is under the action of high pressure for a long time, so that the movable ring and the static ring of the mechanical seal are easily abraded, and the service life is greatly shortened. If the replacement is not carried out in time, leakage is easily generated at the high-pressure end, and pollution and potential safety hazards are caused.

SUMMERY OF THE UTILITY MODEL

The technical problem that this application will be solved lies in, to prior art's the aforesaid not enough, provides a novel vertical centrifugal pump.

This novel vertical centrifugal pump includes:

an outer shell, the bottom of which is provided with an external water inlet and an external water outlet;

the top of the inner shell is provided with an internal water inlet, and the bottom of the inner shell is provided with an internal water outlet; a water inlet channel for communicating an external water inlet with an internal water inlet is formed between the inner shell and the outer shell; the inner water outlet is communicated with the outer water outlet;

a pump shaft arranged in the inner shell in a penetrating way; a power source mounted at the top of the outer casing, the power source being in power connection with the pump shaft

So as to drive the pump shaft to rotate;

a multistage impeller disposed within the inner housing and mounted on the pump shaft;

the guide vane is arranged on the inner shell and is matched with the impeller;

a support structure disposed at a periphery of the pump shaft between the power source and the impeller, the support structure

The support structure is provided with a sealing structure.

In some embodiments, the seal structure is a mechanical seal.

In some embodiments, the power source has a drive shaft; the drive shaft and the pump

The shafts are connected through a coupling.

In some embodiments, the coupling is a wafer-type coupling.

In some embodiments, the power source is an electric motor.

In some embodiments, the outer water inlet and the outer water outlet are disposed on opposite sides of the outer housing.

In some embodiments, the outer housing comprises: the motor mounting seat is arranged above the sleeve body; the supporting structure is arranged on the motor mounting seat and the sleeve body

For supporting the pump shaft.

In the application, the sealing structure between the power source and the multistage impeller only bears the inlet pressure of the pump, the sealing structure and the outer shell do not bear the working pressure of the pump, the sealing is safer and more reliable,

the service life is prolonged.

Drawings

Fig. 1 is a schematic diagram of a prior art structure in the background art of the present application.

Fig. 2 is a schematic structural diagram of a novel vertical centrifugal pump in the embodiment of the present application.

Detailed Description

The following are specific embodiments of the present application and are further described with reference to the accompanying drawings, but the present application is not limited to these embodiments. In the following description of the present invention,

specific details are provided, such as specific configurations and components, merely to facilitate a thorough understanding of the embodiments of the application. Accordingly, it will be apparent to those skilled in the art that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of the present application. In addition, descriptions of well-known functions and constructions are omitted for clarity and conciseness.

In addition, the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

Referring to fig. 2, the present application provides a novel vertical centrifugal pump, including: the device comprises an outer shell 10, an inner shell 20, a pump shaft 40, a power source 50, a multi-stage impeller 60, guide vanes 70 and a support structure 80.

In the present embodiment, the bottom of the outer casing 10 is provided with an external water inlet 11 and an external water outlet 12. The inner shell 20 is accommodated in the outer shell 10, and the top of the inner shell is provided with an inner water inlet 21 and the bottom of the inner shell is provided with an inner water outlet 22; a water inlet channel 30 which is communicated with the external water inlet 11 and the internal water inlet 21 is formed between the inner shell 20 and the outer shell 10; the inner water outlet 22 communicates with the outer water outlet 12. The pump shaft 40 penetrates inside the inner housing 20. The power source 50 is installed on the top of the outer casing 10, and the power source 50 is in power connection with the pump shaft 40 to drive the pump shaft 40 to rotate. A multistage impeller 60 is disposed within the inner housing 20 and mounted on the pump shaft 40. Vanes 70 are mounted on the inner housing 20 and are fitted to the impeller 60. A support structure 80 disposed at the periphery of the pump shaft 40 is disposed between the power source 50 and the impeller 60, and a sealing structure is disposed on the support structure 80.

In operation, the power source 50 drives the pump shaft 40 to rotate, thereby driving the multistage impeller 60 to rotate and forming a negative pressure on the water inlet side. Fluid enters from an external water inlet 11 at the bottom of the outer shell 10, passes through the water inlet passage 30 from bottom to top to reach an internal water inlet 21 of the inner shell 20, then moves downwards along the inner shell 20, forms high-pressure water after being pressurized by the multistage impeller 60, is discharged from an internal water outlet 22 of the inner shell 20, and then is conveyed to a pipeline through an external water outlet 12 on the outer shell 10.

The support structure 80 is disposed at the periphery of the pump shaft 40 between the power source 50 and the impeller 60, and is capable of supporting the pump shaft 40. The support structure 80 is provided with a sealing structure for preventing fluid from leaking into the accommodating cavity in which the motor is located to damage the motor. In the prior art, the mechanical sealing structure needs to bear pressurized high-pressure water, so that the movable ring and the static ring of the mechanical sealing are easily abraded, and the service life is greatly shortened. If the replacement is not carried out in time, leakage is easily generated at the high-pressure end, and pollution and potential safety hazards are caused. In the present application, the fluid borne by the sealing structure on the supporting structure 80 is not pressurized by the impeller, and the mechanical seal and the outer sleeve do not bear the working pressure of the pump, so that the seal is safer and more reliable.

In some embodiments, the sealing structure is a mechanical seal. The mechanical seal is a shaft seal device which is kept jointed by one or a plurality of pairs of end faces which slide relatively and are vertical to a shaft under the action of fluid pressure and the elasticity or magnetic force of a compensation mechanism and matched with auxiliary seal to achieve leakage resistance. Mechanical seals are within the scope of the prior art and are not explained in detail here.

The power source 50 has a drive shaft 51; the drive shaft 51 is connected to the pump shaft 40 by a coupling 52. In some embodiments, the coupling 52 is a wafer-type coupling. Further, the power source 50 is a motor, an internal combustion engine, or the like.

In the embodiment of the present application, the centrifugal pump is a vertical pump, and the external water inlet 11 is disposed at the bottom of the outer casing 10 for facilitating water absorption. In some embodiments, the outer water inlet 11 and the outer water outlet 12 are arranged on opposite sides of the outer housing 10, angularly displaced by 180 ° in the horizontal direction.

Referring to fig. 1, the outer case 10 includes: a sleeve body 13 arranged on the periphery of the inner shell 20, and a motor mounting seat 14 arranged above the sleeve body 13; the supporting structure 80 is disposed between the motor mounting base 14 and the cover 13 for supporting the pump shaft 40. The supporting structure 80 and the sleeve body 13 are sealed by a sealing ring. Here, since the water pressure received by the seal ring is not pressurized, the seal is not likely to leak.

In the embodiment of the application, the sealing structure between the power source and the multistage impeller only bears the inlet pressure of the pump, and the sealing structure and the outer shell do not bear the working pressure of the pump, so that the sealing is safer and more reliable, and the service life is prolonged.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an", and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

In the description of the present application, it is to be understood that the terms "upper", "lower", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application.

The specific embodiments described herein are merely illustrative of the spirit of the application. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the present application as defined by the appended claims.

Claims (7)

1. A novel vertical centrifugal pump is characterized by comprising:

an outer shell (10) provided with an external water inlet (11) and an external water outlet (12) at the bottom;

an inner shell (20) accommodated in the outer shell (10), the top of which is provided with an internal water inlet (21) and the bottom of which is provided with an internal water outlet (22); a water inlet channel (30) communicated with the external water inlet (11) and the internal water inlet (21) is formed between the inner shell (20) and the outer shell (10); the inner water outlet (22) is communicated with the outer water outlet (12);

a pump shaft (40) arranged in the inner shell (20) in a penetrating way;

the power source (50) is arranged at the top of the outer shell (10), and the power source (50) is in power connection with the pump shaft (40) to drive the pump shaft (40) to rotate;

a multistage impeller (60) disposed within the inner housing (20) and mounted on the pump shaft (40);

a guide vane (70) mounted on the inner housing (20) and adapted to the impeller (60);

a supporting structure (80) arranged on the periphery of the pump shaft (40) is arranged between the power source (50) and the impeller (60), and a sealing structure is arranged on the supporting structure (80).

2. The novel vertical centrifugal pump of claim 1, wherein said sealing structure is a mechanical seal.

3. Vertical centrifugal pump, according to claim 1, characterized in that said power source (50) has a drive shaft (51); the driving shaft (51) is connected with the pump shaft (40) through a coupling (52).

4. Vertical centrifugal pump according to claim 3, characterized in that said coupling (52) is a wafer coupling.

5. Vertical centrifugal pump according to claim 1, characterized in that said power source (50) is an electric motor.

6. Vertical centrifugal pump according to claim 1, characterized in that the external water inlet (11) and outlet (12) are arranged on opposite sides of the outer casing (10).

7. Vertical centrifugal pump, according to claim 1, characterized in that said outer casing (10) comprises: a sleeve body (13) arranged on the periphery of the inner shell (20) and a motor mounting seat (14) arranged above the sleeve body (13); the supporting structure (80) is arranged between the motor mounting seat (14) and the sleeve body (13) and used for supporting the pump shaft (40).

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