CN215171098U

CN215171098U - Gas-liquid pump ESA

Info

Publication number: CN215171098U
Application number: CN202023258885.5U
Authority: CN
Inventors: 赵志妹
Original assignee: Ace Equipment Wuxi Co ltd
Current assignee: Ace Equipment Wuxi Co ltd
Priority date: 2020-12-29
Filing date: 2020-12-29
Publication date: 2021-12-14
Anticipated expiration: 2030-12-29

Abstract

The utility model relates to the field of gas-liquid pumps, and discloses a gas-liquid pump ESA, which comprises a pump body, wherein a volute flow passage and a bearing suspension are arranged on the pump body, a rotating shaft is arranged in the bearing suspension, the rotating shaft passes through the pump body, an impeller is arranged at the outlet of the volute flow passage in the pump body, the impeller comprises an impeller body, blades, a front cover plate, a rear cover plate and a hub, the center of the impeller is connected with one end of the hub, the other end of the hub is connected with the rotating shaft, the front cover plate is sleeved on the impeller body, the rear cover plate is sleeved on the hub, a plurality of blades are arranged on the impeller body along the circumferential direction, all the blades are uniformly distributed, one surface of the blade, which deviates from the hub, is clung to the front cover plate, one surface of the blade, which is close to the hub, is clung to the rear cover plate, the area of the rear cover plate is smaller than that of the blades, when in actual use, the blades can suck liquid and gas into the pump body and then mix by pressurization, the gas and the liquid are fully dissolved, and bubbles in the conveying pipeline are avoided.

Description

Gas-liquid pump ESA

Technical Field

The utility model relates to a gas-liquid pump field, concretely relates to gas-liquid pump ESA.

Background

At present, the single-stage single-suction centrifugal pump is widely applied to various industries due to the advantages of wide flow and lift range, simple structure, low manufacturing cost, convenience in installation and maintenance and the like. In the use process, a conveying medium has a gas-liquid two-phase flow under a specific condition, a conventional centrifugal pump is generally only used for conveying a clean and impurity-free liquid medium, gas or particles are not allowed to exist in a pipeline, if gas or bubbles are mixed in the pipeline, when the bubbles are broken in the high-speed operation process, surrounding liquid can quickly fill cavities, liquid particles impact each other, and the liquid particles strike the surface of an overflowing component in the process of impacting each other, so that the overflowing component is abraded, abnormal sound is generated, and unit vibration is generated, and the performance of the pump is influenced. If a conventional centrifugal pump is to be capable of delivering two media, namely gas and liquid, at the same time, a gas-liquid mixing device, such as an air compressor, a pressure vessel, an ejector and the like, is required to be installed on the centrifugal pump to fully mix the gas and the liquid. This approach not only complicates the structure of the centrifugal pump, but also increases the cost of application of the centrifugal pump.

SUMMERY OF THE UTILITY MODEL

In view of the deficiency of the background art, the utility model provides a gas-liquid pump ESA, the technical problem that solve need cooperate gas-liquid mixing device to use together when carrying two kinds of media of gas and liquid for current centrifugal pump, can not carry two kinds of media of gas and liquid alone.

For solving the technical problem, the utility model provides a following technical scheme: the utility model provides a gas-liquid pump ESA, which comprises a pump body, be equipped with spiral case runner and bearing suspension on the pump body, be equipped with the rotation axis in the bearing suspension, the rotation axis passes the pump body, the impeller is installed in the exit of spiral case runner to the pump body is inside, the impeller includes impeller body, the blade, the front shroud, back shroud and wheel hub, the center and the wheel hub one end of impeller are connected, the wheel hub other end is connected with the axis of rotation, the front shroud cover is on impeller body, back shroud cover is on wheel hub, follow a plurality of blades of circumferencial direction installation on the impeller body, all blade evenly distributed, the one side that the blade deviates from wheel hub is hugged closely with the front shroud, the front shroud covers the blade, the one side that the blade is close to wheel hub is hugged closely with the back shroud, the back shroud covers the area of blade is less than the area of blade.

When the impeller is actually used, the front cover plate completely covers one surface of the blade, which is far away from the hub, and the rear cover plate does not completely cover one surface of the blade, which is close to the hub, so that the stress of the impeller in the rotating process can be reduced, and the impeller is insensitive to the change of axial displacement on the axial lead.

As a further technical scheme, a pump cover is further installed on the pump body, the bearing suspension is fixed on the pump cover, a cavity is formed in the pump cover, a mechanical seal static ring, a mechanical seal dynamic ring and a mechanical seal blocking sleeve are sequentially arranged in the cavity along the direction close to the wheel hub, and the rotating shaft penetrates through the mechanical seal static ring, the mechanical seal dynamic ring and the mechanical seal blocking sleeve and then is connected with the wheel hub.

Furthermore, a sealing cavity body which is obliquely arranged is arranged in the pump cover, a plurality of guide plates are arranged in the sealing cavity body, and the sealing cavity body is communicated with the interior of the volute flow channel through a flushing pipe.

When the device is actually used, the guide plates form a directional loop, liquid in a volute flow channel enters the sealed cavity from the flushing pipe and then can flush the sealed cavity, and the flushed liquid enters the pump body from the cavity provided with the mechanical seal static ring.

As a further technical scheme, the volute flow channel is in an inverted trumpet shape, and two flow baffles are arranged at the center of the volute flow channel in the vertical direction. The two flow baffle plates can prevent the medium with large flow from generating turbulent flow when passing through the volute flow channel.

As a further technical scheme, the thickness of the blade is gradually increased from the two ends of the blade to the middle of the blade.

As a further technical scheme, five, six or seven blades are uniformly distributed on the impeller.

As a further technical scheme, a balance hole is formed in the rear cover plate, and a balance ring is arranged at one end, far away from the hub, of the rear cover plate. When the balance ring is actually used, the axial force can be effectively balanced through the balance hole and the balance ring, and the operation efficiency of the pump is improved.

As a further technical scheme, the pump body is a volute type pump body, the impeller is arranged in the center of the pump body, and the center of the impeller is connected with the hub through key connection. The keyed coupling ensures that the centers of all the vanes coincide with the center of the pump body.

Furthermore, the volute channel is arranged above the impeller, and a pear-shaped inner channel is arranged below the impeller in the pump body.

Compared with the prior art, the utility model beneficial effect who has is: firstly, all the blades are uniformly distributed on the impeller body, the front cover plate completely covers the blades, the inlet loss is reduced, the efficiency of the open impeller is improved, in addition, the area of the rear cover plate covering the blades is smaller than the area of the blades, the impeller is of a semi-open structure, the conveying requirements of different media can be met by adjusting the distance between the rear cover plate and the pump cover, when the impeller of the utility model rotates at a high speed, the blades suck liquid and gas into the pump body and then pressurize and mix the liquid and the gas in the pump, so that the gas and the liquid are fully dissolved, and bubbles in a conveying pipeline are avoided; secondly, a sealing cavity is arranged in the pump cover and is communicated with a volute flow channel through a flushing pipe, the interior of the pump body can be cooled by injecting liquid into the sealing cavity, and the heat dissipation problem of long-time operation of the pump is solved; in addition, the balance hole and the balance ring are arranged on the rear cover plate, so that the axial force can be effectively balanced, and the operating efficiency of the pump is improved.

Drawings

The utility model discloses there is following figure:

fig. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic structural view of the impeller of the present invention;

FIG. 3 is a schematic view of the thickness of the impeller blade of the present invention;

fig. 4 is the structure schematic diagram of the mechanical seal stationary ring, the mechanical seal rotating ring and the mechanical seal blocking sleeve installed in the pump cover of the utility model.

Detailed Description

The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic drawings and illustrate the basic structure of the present invention only in a schematic manner, and thus show only the components related to the present invention.

As shown in fig. 1-4, the gas-liquid pump ESA comprises a pump body 1, wherein a volute flow channel 13, a pump cover 3 and a bearing suspension 8 are arranged on the pump body 1.

Wherein the top at the pump body 1 is installed to the spiral case runner 13, impeller 2 is installed at the exit of spiral case runner 13 inside the pump body 1, impeller 2 includes impeller body 20, blade 22, front shroud 21, back shroud 23 and wheel hub 24, impeller body 20's center is connected with wheel hub 24 one end, front shroud 21 overlaps on impeller body 20, back shroud 23 overlaps on wheel hub 24, a plurality of blades 22 of edge circumferencial direction installation on impeller body 20, all blades 22 evenly distributed, the one side that blade 22 deviates from wheel hub 24 is hugged closely with front shroud 21, front shroud 21 covers blade 22, the one side that blade 22 is close to wheel hub 24 is hugged closely with back shroud 23, the area that back shroud 23 covers blade 22 is less than blade 22's area.

Further, in the present embodiment, the pump body 1 is a volute type pump body, the impeller 2 is located at the center of the pump body 1, the center of the impeller 2 is connected to the hub 24 through a key connection, and the key connection can ensure that the centers of all the blades coincide with the center of the pump body 1. Further, a pear-shaped inner flow passage 12 is provided below the impeller 2 inside the pump body 1.

Further, in this embodiment, six blades 22 are uniformly distributed on the impeller body 20, and the thickness of the blades 22 gradually increases from the two ends of the blades to the middle of the blades 22.

Further, in this embodiment, the front cover plate 21 and the impeller body 20 are integrally formed, the rear cover plate 23 and the hub 24 are integrally formed, the rear cover plate 23 covers one third of the blade 22 from the root of the blade 22, the rear cover plate 23 is provided with a balance hole 25, and one end of the rear cover plate 23 away from the hub 24 is provided with a balance ring 26. In practical use, axial force can be effectively balanced through the balance hole 25 and the balance ring 26, and the operation efficiency of the pump is improved.

Further, in this embodiment, the volute flow channel 13 is in an inverted trumpet shape, and two baffle plates 11 are installed at the center of the volute flow channel 13 in the vertical direction. The two baffle plates 11 can prevent the medium with large flow from generating turbulence when passing through the volute flow channel 11.

Further, in the present embodiment, the pump cover 3 is mounted on the right side surface of the pump body 1 through a stud, the bearing suspension 8 is mounted on the pump cover 3, two angular contact ball bearings 16 are arranged in the bearing suspension 8 side by side, the rotating shaft 7 is mounted in the two angular contact ball bearings 16, and the rotating shaft 7 penetrates through the pump cover 3 and then is connected with the other end of the hub 24. In actual use, the two angular contact ball bearings 16 arranged side by side can better balance axial force, and the service life of the angular contact ball bearing 16 is prolonged.

In this embodiment, a cavity 17 is formed in the pump cover 3, the mechanical seal stationary ring 4, the mechanical seal moving ring 5 and the mechanical seal blocking sleeve 6 are sequentially arranged in the cavity 17 along a direction close to the hub 24, the mechanical seal blocking sleeve 6 compresses the mechanical seal stationary ring 4 and the mechanical seal moving ring 5 in the cavity, and the rotating shaft 7 penetrates through the mechanical seal stationary ring 4, the mechanical seal moving ring 5 and the mechanical seal blocking sleeve 6 and then is connected with the hub 24.

Further, in this embodiment, a seal cavity 14 is disposed in the pump cover 3 in an inclined manner, a plurality of guide plates 15 are mounted in the seal cavity 14, and the seal cavity 14 is communicated with the interior of the volute flow channel 13 through the flushing pipe 9. In practical use, the guide plates 15 form a directional loop, liquid in the volute flow channel 13 enters the sealed cavity from the flushing pipe 9 and then can flush the sealed cavity, heat dissipation is achieved, and the flushed liquid flows into the pump body 1 from the cavity 17.

In light of the above, the present invention is not limited to the above embodiments, and various changes and modifications can be made by the worker without departing from the scope of the present invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. A gas-liquid pump ESA characterized by: the volute flow passage is in a horn shape, two flow baffles are installed at the center of the volute flow passage in the vertical direction, a rotating shaft is arranged in the bearing suspension and penetrates through the pump body, an impeller is installed at the outlet of the volute flow passage inside the pump body and comprises an impeller body, blades, a front cover plate, a rear cover plate and a hub, the center of the impeller is connected with one end of the hub, the other end of the hub is connected with the rotating shaft, the front cover plate is sleeved on the impeller body, the rear cover plate is sleeved on the hub, a plurality of blades are installed on the impeller body in the circumferential direction, all the blades are uniformly distributed, one surface of each blade, which is deviated from the hub, is tightly attached to the front cover plate, the front cover plate covers the blades, and one surface, which is close to the hub, of the blades is tightly attached to the rear cover plate, the area of the rear cover plate covering the blade is smaller than that of the blade; the pump body is also provided with a pump cover, the bearing suspension is fixed on the pump cover, the pump cover is provided with a cavity, a mechanical seal static ring, a mechanical seal dynamic ring and a mechanical seal blocking sleeve are sequentially arranged in the cavity along the direction close to the hub, and the rotating shaft penetrates through the mechanical seal static ring, the mechanical seal dynamic ring and the mechanical seal blocking sleeve and then is connected with the hub; the pump cover is internally provided with a sealing cavity body which is obliquely arranged, a plurality of guide plates are arranged in the sealing cavity body, and the sealing cavity body is communicated with the interior of the volute flow channel through a flushing pipe.

2. A gas-liquid pump ESA according to claim 1, characterized in that: the thickness of the blade gradually increases from the two ends of the blade to the middle of the blade.

3. A gas-liquid pump ESA according to claim 1, characterized in that: five, six or seven blades are uniformly distributed on the impeller body.

4. A gas-liquid pump ESA according to claim 1, characterized in that: the rear cover plate is provided with a balance hole, and one end of the rear cover plate, which is far away from the hub, is provided with a balance ring.

5. A gas-liquid pump ESA according to any of claims 1-4, characterized in that: the pump body is a volute type pump body, the impeller is arranged in the center of the pump body, and the center of the impeller is connected with the hub through key connection.

6. A gas-liquid pump ESA according to claim 5, characterized in that: the volute flow channel is arranged above the impeller, and a pear-shaped inner flow channel is arranged below the impeller in the pump body.