CN220354120U

CN220354120U - a pump

Info

Publication number: CN220354120U
Application number: CN202321325239.7U
Authority: CN
Inventors: 陈言琛; 曾祥友; 韦立川
Original assignee: Shenzhen Envicool Technology Co Ltd
Current assignee: Shenzhen Envicool Technology Co Ltd
Priority date: 2023-05-29
Filing date: 2023-05-29
Publication date: 2024-01-16
Anticipated expiration: 2033-05-29

Abstract

The utility model relates to the technical field of power equipment, and particularly discloses a pump which comprises a pump shell, rotary driving equipment, an impeller and a sealing structure. The pump comprises a pump shell, a pump cavity, a fluid inlet and a fluid outlet, wherein the pump cavity is formed in the pump shell; the rotary driving device is fixedly connected with the pump shell, and the shaft core part of the rotary driving device is arranged in the pump cavity; the impeller is arranged in the pump cavity and fixedly arranged on the shaft core; the sealing structure is used for sealing the pump cavity, and the sealing structure is close to the water suction inlet of the impeller. By applying the pump provided by the utility model, the sealing structure is positioned at the low pressure side in the pump cavity, so that the sealing pressure is not increased due to the increase of the impeller stage number, the leakage risk is reduced, the reliability of the pump is improved, and the service life of the pump is prolonged. And the fluid inlet and the fluid outlet are arranged on the pump shell, so that the flow resistance is small, the pump shell is simple in structure and convenient for later maintenance.

Description

Pump with a pump body

Technical Field

The utility model relates to the technical field of power equipment, in particular to a pump.

Background

The pump is a rotary machine which converts electric energy into mechanical energy and converts the mechanical energy into kinetic energy, and is a device commonly used for pressurizing and conveying working fluid. The impeller of the traditional pump absorbs water and is arranged at the fluid inlet, the mechanical shaft seal is arranged at the impeller outlet, and the sealing pressure is increased along with the increase of the multistage impeller for each stage, namely, the fluid pressure at the rotary mechanical shaft seal is correspondingly increased along with the increase of the multistage impeller, so that the risk of liquid leakage exists in the long-term.

In the process of implementing the present utility model, the inventor finds that at least the following problems exist in the prior art: how to effectively solve the problems of easy leakage and the like of the pump sealing structure due to larger pressure is a problem which needs to be solved by the prior art.

Disclosure of Invention

Therefore, the present utility model is directed to a pump, which can effectively solve the problem that the pump sealing structure is easy to leak due to the high pressure.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

a pump, comprising:

the pump comprises a pump shell, wherein a pump cavity is formed in the pump shell, and a fluid inlet for externally connecting fluid and a fluid outlet for discharging fluid are formed in the pump shell;

the rotary driving device is fixedly connected with the pump shell, and a shaft core part of the rotary driving device is arranged in the pump cavity;

the impeller is arranged in the pump cavity and fixedly arranged on the shaft core;

and the sealing structure is used for sealing the pump cavity and is close to the water suction inlet of the impeller.

Optionally, in the pump, a water suction inlet of the impeller is close to the fluid inlet, and an outlet of the impeller is close to the fluid outlet.

Optionally, in the pumping, the impeller is three or more stages of impellers.

Optionally, in the above pump, the sealing structure includes a seal groove seat and a mechanical shaft seal, where the seal groove seat is used to seal and fix with a bearing of the rotary driving device, and the mechanical shaft seal is used to seal and fix with a shaft core of the rotary driving device.

Optionally, in the above pump, the pump casing includes a driving casing and a pump cavity casing that are mutually adapted and connected, the pump cavity is disposed in the pump cavity casing, and the rotary driving device is disposed in the driving casing.

Optionally, in the above pump, the seal groove seat and the driving shell are integrally formed, and a seal ring is installed at a connection position between the driving shell and the pump cavity shell.

Optionally, in the above pump, lugs are respectively disposed at the outer sides of the driving shell and the pump cavity shell, and each lug is respectively connected through a bolt.

Optionally, in the above pump, the mechanical shaft seal includes a stationary ring mechanical seal and a moving ring mechanical seal that are mutually matched, the stationary ring mechanical seal is fixed on the seal groove seat, and the moving ring mechanical seal is disposed on the shaft core.

Optionally, in the pumping, a sealing gasket is further disposed on the mechanical seal of the moving ring.

Optionally, in the above pump, the fluid outlet and the fluid inlet are both disposed on an outer circumferential surface of the pump casing, or the fluid inlet is disposed on an outer circumferential surface of the pump casing, and the fluid outlet is disposed on an axial end surface of the pump casing.

The pump provided by the utility model seals the pump cavity through the sealing structure, and the sealing structure is close to the water suction inlet of the impeller, namely, the sealing structure is positioned at the suction side of the impeller in the pump cavity, and the fluid pressure is increased towards the outlet direction of the impeller along with the increase of the number of stages of the impeller, so that the sealing pressure is not increased along with the increase of the number of stages of the impeller, the leakage risk is reduced, and the reliability and the service life of the pump are improved. In addition, the pump provided by the utility model has the advantages that the fluid inlet and the fluid outlet are arranged on the pump shell, and the flow resistance is smaller because of the flow channel which enters from one end of the pump shell and exits from the other end. And the pump shell has simple structure and lower cost, and is convenient for later maintenance.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of an exploded view of a pump according to one embodiment of the present utility model;

FIG. 2 is another schematic view of FIG. 1;

fig. 3 is a schematic diagram of the stereoscopic apparatus of fig. 1.

The figures are marked as follows:

pump housing 1, fluid inlet 11, fluid outlet 12, pump chamber 13, drive housing 14, pump chamber housing 15;

a rotary drive device 2, a shaft core 21, a bearing 22;

impeller 3, volute 31, nut 32;

sealing structure 4, mechanical shaft seal 41, sealing groove seat 42, annular groove 421, sealing gasket 5 and bolt 6.

Detailed Description

The embodiment of the utility model discloses a pump, which is used for reducing the risk of leakage of a sealing structure due to high pressure.

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1-3, fig. 1 is a schematic diagram illustrating an explosion structure of a pump according to an embodiment of the utility model; FIG. 2 is another schematic view of FIG. 1; fig. 3 is a schematic diagram of the stereoscopic apparatus of fig. 1.

In one embodiment, the present utility model provides a pump comprising a pump housing 1, a rotary drive device 2, an impeller 3 and a seal arrangement 4. The pump casing 1 is internally provided with a pump cavity 13, and two ends of the pump casing 1 corresponding to the axial direction of the pump cavity 13 are respectively provided with a fluid inlet 11 for externally connecting fluid and a fluid outlet 12 for discharging fluid, namely, the pump cavity 13 is used for integrally guiding the fluid and is a straight channel. It will be appreciated that in use, the fluid inlet 11 and the fluid outlet 12 are connected to a circuit of working fluid such as a cooling circuit, the fluid enters the pump chamber 13 from the fluid inlet 11, flows through the pump chamber 13 under the suction of the impeller 3 and is discharged from the fluid outlet 12. The fluid inlet 11 and the fluid outlet 12 are provided at both ends of the pump chamber 13, and may be provided on the outer peripheral surface of the pump casing 1 or may be provided on the end surface of the pump casing 1.

The rotary driving device 2 is fixedly connected with the pump shell 1, and a shaft core 21 of the rotary driving device 2 is partially arranged in the pump cavity 13; the impeller 3 is arranged in the pump cavity 13, and the impeller 3 is fixedly arranged on the shaft core 21. The impeller 3 is driven by the rotary driving device 2, and the impeller 3 works on the fluid due to different circumferential installation angles. The number of impellers 3 may be one or more, i.e. one-stage impellers 3 or a plurality of stages of impellers 3 connected in series, the specific number is not limited herein.

The sealing structure 4 is arranged close to the suction inlet of the impeller 3 and the suction inlet of the impeller 3 is close to the fluid inlet 11 and the outlet of the impeller 3 is close to the fluid outlet 12, so that fluid enters the pump chamber 13 from the fluid inlet 11 and then enters the impeller suction inlet under the suction of the impeller, along the IGV-volute of the impeller, is thrown out from the outlet of the impeller and exits the pump chamber 13 from the fluid outlet 12.

It will be appreciated that the pump chamber 13 is for fluid passage and should remain sealed except for the fluid inlet 11 and the fluid outlet 12. The specific arrangement of the impeller 3 and the rotary driving device 2 can refer to a conventional pumping structure, and the structure of the pump body and the arrangement of the positions of the fluid inlet 11, the fluid outlet 12 and the impeller are adopted, so that a straight channel type pump cavity 13 is formed, and the sealing structure 4 is positioned in a low pressure area of the pump cavity 13; in addition, in this embodiment, the impeller 3 is preferably a three-stage or three-stage impeller, the sealing structure is close to the water intake inlet of the impeller in the pump cavity, and the fluid pressure increases along with the increase of the impeller stage number towards the outlet direction of the impeller, so that the sealing pressure is not increased along with the increase of the impeller stage number, the leakage risk is reduced, and the reliability and the service life of the pump are improved.

According to the pump provided by the utility model, the shaft core 21 of the rotary driving device 2 is partially arranged in the pump cavity 13, the sealing structure 4 is used for sealing the pump cavity, and the sealing structure is close to the water suction inlet of the impeller in the pump cavity, namely, the sealing structure 4 is positioned at the low pressure side in the pump cavity 13, so that the sealing pressure is not increased due to the increase of the number of stages of the impeller 3, the leakage risk is reduced, and the reliability and the service life of the pump are improved. In addition, the pump provided by the utility model has the advantages that the fluid inlet 11 and the fluid outlet 12 are arranged at the pump shell, in particular at the two axial ends of the pump cavity 13, so that a straight channel type flow channel with one inlet end and the other outlet end is formed, and the flow resistance is smaller. In addition, the pump shell 1 has simple structure and lower cost, and is convenient for later maintenance.

In one embodiment, the sealing structure 4 comprises a sealing groove seat 42 and a mechanical shaft seal 41, the sealing groove seat 42 is used for sealing and fixing with the bearing 22 of the rotary driving device 2, and the mechanical shaft seal 41 is used for sealing and fixing with the shaft core 21 of the rotary driving device 2. The seal groove seat 42 is disposed at the connection between the bearing 22 and the pump cavity 13, and is used for preventing fluid from leaking from the bearing 22, the shaft core 21 is partially disposed in the pump cavity 13, and the mechanical shaft seal 41 is disposed on the shaft core 21 to keep the pump cavity 13 sealed at the shaft core 21, so as to prevent fluid from leaking from the shaft core 21. During installation, the mechanical shaft seal 41 and the seal groove seat 42 are matched and combined into an integral seal structure 4 so as to realize the sealing of the pump cavity 13.

In one embodiment, the pump housing 1 comprises a drive housing 14 and a pump chamber housing 15 which are adapted to each other, the rotary drive device 2 being fixed in the drive housing 14, and the shaft core 21 being provided in the drive housing 14 through the pump chamber housing 15. The pump shell 1 adopts a driving shell 14 and a pump cavity shell 15 which are matched, and the split structure is convenient for installing parts such as the impeller 3 in the pump cavity. The structure of the driving housing 14 may be correspondingly set according to the rotation driving apparatus 2, and the structure of the pump chamber housing 15 may be correspondingly set according to the number of impellers 3, etc.

In one embodiment, seal groove seat 42 is integrally formed with drive housing 14 and a seal ring is installed at the junction between drive housing 14 and pump chamber housing 15. The seal groove seat 14 and the driving shell 14 are integrally formed, so that the seal groove seat 42 and the bearing 22 have better sealing performance, and are convenient to process and reliable in connection. The drive housing 14 and the pump chamber housing 15 are connected with each other in a reliable sealing manner by the arrangement of a sealing ring. Specifically, the outer circumferential surface of the seal groove seat 42 is provided with a ring groove 421, and a seal ring is installed in the ring groove 421. The drive housing 14 and the pump chamber housing 15 are reliably and hermetically connected by the combination of the seal groove seat 42 and the seal ring. By the arrangement, the sealing ring is also arranged on the low pressure side of the pump cavity 13, so that the sealing pressure is not increased due to the increase of the number of stages of the impeller 3, and the leakage risk is reduced.

Each stage of impeller 3 is specifically disposed in the tubular body 15, and impeller 3 guide vanes (IGVs) or scroll shells 31, which are matched with each stage of impeller 3, can be respectively disposed, and act on the fluid inside guide of the impeller 3. The impeller 3 may be fixed to the shaft core 21 by nuts 32 and washers.

In one embodiment, lugs are provided on the outside of the drive housing 14 and pump housing 15, respectively, each lug being connected by a bolt 6, respectively. Through setting up the journal stirrup, further strengthened the reliability of connecting between drive shell 14 and the pump chamber shell 15, prevent that the fluid from revealing in the pump chamber 13, and be convenient for personnel carry out the dismouting to bolt 6. The driving shell 14 and the pump cavity shell 15 are connected through the bolts 6, so that the tightness of the pump cavity 13 is ensured, and meanwhile, the assembly and the disassembly are convenient.

In one embodiment, the mechanical shaft seal 41 comprises a stationary mechanical seal and a moving mechanical seal that cooperate, the stationary mechanical seal being secured to the seal groove seat 42, the moving mechanical seal being disposed on the shaft core 21. The stationary ring mechanical seal is arranged on the seal groove seat 42 and is in sealing connection with the seal groove seat 42, the movable ring mechanical seal is arranged on the shaft core 21 and is in sealing connection with the shaft core 21, and the movable ring mechanical seal and the stationary ring mechanical seal can be kept sealed before each other, so that the sealing at the shaft core 21 is realized. The mechanical shaft seal can always maintain reliable sealing in the rotation process of the shaft core 21, and fluid leakage is effectively prevented.

In one embodiment, the ring mechanical seal is also provided with a sealing gasket 5. The sealing gasket 5 is specifically sleeved on the shaft core 21 and is located at one end, far away from the sealing groove seat 42, of the movable ring mechanical seal, and sealing is enhanced in an auxiliary mode through the sealing gasket 5, so that sealing reliability is improved.

In one embodiment, the fluid outlet 12 and the fluid inlet 11 are both provided on the outer circumferential surface of the pump housing 1. The two can be arranged in parallel. In other embodiments, the fluid inlet 11 is provided on the outer circumferential surface of the pump casing 1, and the fluid outlet 12 is provided on the axial end surface of the pump casing 1, that is, the fluid inlet 11 is provided on the outer circumferential surface of the pump casing 1 so as to be close to the seal structure 4, and the fluid outlet 12 is provided on the end surface of the pump body opposite to the penetrating end of the axial core 21. The specific fluid outlet 12 can be arranged according to the position of the fluid inlet and outlet of the pump external equipment.

In one embodiment, the fluid inlet 11 is provided on a side of the impeller 3 adjacent to the rotary drive device 2 close to the rotary drive device 2. It will be appreciated that where the impeller 3 adjacent to the rotary drive device 2 is referred to herein as the one impeller 3 closest to the rotary drive device 2, i.e. the primary impeller 3, the fluid inlet 11 is provided on the side of the primary impeller 3 closest to the rotary drive device 2, and the seal arrangement 4 is correspondingly located in the lowest region of fluid pressure within the pump chamber 13, as shown in figure 2, the region indicated by the dashed box being the seal pressure region, which is located before the primary impeller 3. By setting up as above, taking this pump for circulation heat dissipation as an example, the external fluid flows from the fluid inlet 11 to seal the pressure area, the sealing structure 4, the impeller 3, IGV, and the primary impeller 3 or the multistage impeller 3 guides the fluid to the fluid outlet 12 due to the centrifugal force, and works on the system, thereby circulation heat dissipation. Because the sealing structure 4 of the pump is arranged on the suction side of the impeller 3, the sealing is ensured, and meanwhile, the liquid leakage is caused by large sealing pressure due to the multistage serial pressure increase of the impeller 3. Specifically, a flow guiding structure, such as a flow guiding ring, is arranged on one side of the primary impeller 3, which is close to the rotary driving device 2, and a through hole is formed in the flow guiding ring, so that fluid entering from the fluid inlet 11 enters the primary impeller 3 under the action of the flow guiding structure.

In one embodiment, the rotary drive device 2 is a motor, the housing of which, for example, the drive housing 14, is provided with bearings 22 at both ends, respectively, for supporting, fixing and rotating the shaft core 21.

In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present utility model is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A pump, comprising:

the pump comprises a pump shell (1), wherein a pump cavity (13) is formed in the pump shell (1), and a fluid inlet (11) for externally connecting fluid and a fluid outlet (12) for discharging fluid are formed in the pump shell (1);

the rotary driving device (2) is fixedly connected with the pump shell (1), and a shaft core (21) of the rotary driving device (2) is partially arranged in the pump cavity (13);

the impeller (3) is arranged in the pump cavity (13), and the impeller (3) is fixedly arranged on the shaft core (21);

and the sealing structure (4) is used for sealing the pump cavity (13), and the sealing structure (4) is close to the water suction inlet of the impeller (3).

2. Pump according to claim 1, characterized in that the suction inlet of the impeller (3) is close to the fluid inlet (11) and the outlet of the impeller (3) is close to the fluid outlet (12).

3. Pump according to claim 2, characterized in that the impeller (3) is a three or more stage impeller.

4. Pump according to claim 1, characterized in that the sealing structure (4) comprises a sealing groove seat (42) and a mechanical shaft seal (41), the sealing groove seat (42) being adapted to be sealingly fastened with a bearing (22) of the rotary drive device (2), the mechanical shaft seal (41) being adapted to be sealingly fastened with a shaft core (21) of the rotary drive device (2).

5. Pump according to claim 4, characterized in that the pump housing (1) comprises a drive housing (14) and a pump chamber housing (15) which are adapted to each other, the pump chamber (13) being provided in the pump chamber housing (15), the rotary drive device (2) being provided in the drive housing (14).

6. Pump according to claim 5, characterized in that the sealing groove seat (42) is provided integrally with the drive housing (14) and in that a sealing ring is mounted at the connection between the drive housing (14) and the pump chamber housing (15).

7. Pump according to claim 5, characterized in that lugs are provided outside the drive housing (14) and the pump chamber housing (15), respectively, which lugs are connected by means of bolts (6), respectively.

8. The pump according to claim 4, characterized in that the mechanical shaft seal (41) comprises a stationary ring mechanical seal and a moving ring mechanical seal cooperating with each other, the stationary ring mechanical seal being fixed to the seal groove seat (42), the moving ring mechanical seal being arranged on the shaft core (21).

9. Pump according to claim 8, characterized in that the mechanical seal of the moving ring is further provided with a sealing gasket (5).

10. Pump according to claim 1, characterized in that the fluid outlet (12) and the fluid inlet (11) are both provided on the outer circumferential surface of the pump housing (1), or the fluid inlet (11) is provided on the outer circumferential surface of the pump housing (1), the fluid outlet (12) being provided on the axial end surface of the pump housing (1).