阅读说明：本技术 一种气液泵esa (Gas-liquid pump ESA ) 是由 赵志妹 于 2020-12-29 设计创作，主要内容包括：本发明涉及气液泵领域,公开了一种气液泵ESA,包括泵体,泵体上设有蜗壳流道和轴承悬架,轴承悬架内设有旋转轴,旋转轴穿过泵体,泵体内部在蜗壳流道的出口处安装有叶轮,叶轮包括叶轮本体、叶片、前盖板、后盖板和轮毂,叶轮的中心与轮毂一端连接,轮毂另一端与旋转轴连接,前盖板套在叶轮本体上,后盖板套在轮毂上,叶轮本体上沿圆周方向安装多个叶片,所有叶片均匀分布,叶片背离轮毂的一面与前盖板紧贴,前盖板覆盖叶片,叶片靠近轮毂的一面与后盖板紧贴,后盖板覆盖所述叶片的面积小于所述叶片的面积,在实际使用时,叶片选择会将液体和气体吸入泵体内部后再由泵内加压混合,使气体与液体充分溶解,避免输送管路中存在气泡。(The invention relates to the field of gas-liquid pumps, and discloses an ESA (electronic static pressure relief) of a gas-liquid pump, 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 penetrates through the pump body, an impeller is arranged at an 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 blades, which is far away from the hub, is tightly attached to the front cover plate, the surface of the blades, which is close to the hub, the gas and the liquid are fully dissolved, and bubbles in the conveying pipeline are avoided.)

1. A gas-liquid pump ESA characterized by: comprises a pump body, wherein a volute flow channel and a bearing suspension are arranged on the pump body, a rotating shaft is arranged in the bearing suspension, the rotating shaft penetrates through the pump body, an impeller is arranged at an outlet of the volute flow channel 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 back 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 is far away from the hub, is clung to the front cover plate, the front cover plate covers the blade, one surface of the blade, which is close to the hub, is tightly attached to the rear cover plate, and the area of the rear cover plate, which covers the blade, is smaller than that of the blade.

2. A gas-liquid pump ESA according to claim 1, characterized in that: the pump is characterized in that 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.

3. A gas-liquid pump ESA according to claim 2, characterized in that: 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.

4. A gas-liquid pump ESA according to any of claims 1, characterized in that: the volute flow channel is in an inverted horn shape, and two flow baffles are arranged at the center of the volute flow channel in the vertical direction.

5. 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.

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

7. 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.

8. A gas-liquid pump ESA according to any of claims 1-7, 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 key through key connection.

9. A gas-liquid pump ESA according to claim 8, 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.

Technical Field

The invention relates to the field of gas-liquid pumps, in particular to an ESA (automatic vapor deposition) of a gas-liquid pump.

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.

Disclosure of Invention

In view of the defects of the background art, the invention provides the gas-liquid pump ESA, and aims to solve the technical problem that the conventional centrifugal pump needs to be matched with a gas-liquid mixing device for use when conveying two media, namely gas and liquid, and cannot independently convey the two media, namely the gas and the liquid.

In order to solve the technical problems, the invention provides the 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.

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 invention has the beneficial effects that: 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 rotates at a high speed, liquid and gas are sucked into the pump body by the blades and then are pressurized and mixed 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 invention has the following drawings:

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

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

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

fig. 4 is a schematic structural view of a mechanical seal stationary ring, a mechanical seal moving ring and a mechanical seal blocking sleeve which are arranged in a pump cover of the invention.

Detailed Description

The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution 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 foregoing, it is to be understood that various changes and modifications may be made by those skilled in the art without departing from the spirit and scope of the 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.