Liquid ring vacuum pump with rotatable pump body structure

Abstract

The invention belongs to the technical field of liquid ring vacuum pumps, and particularly relates to a rotatable pump body structure liquid ring vacuum pump which comprises a pump body, an impeller, a pump shaft, a pump body side cover and a distributor, the pump shaft sequentially penetrates through the pump body, the distributor and the impeller and is rotatably connected to the pump body side cover, and the impeller is fixedly installed on the pump shaft. And a rotary pump body structure surrounding the impeller is arranged in the pump body. The pump shaft drives the impeller to rotate, the impeller drives the liquid ring to rotate at a high speed, the rotating liquid ring drives the rotating pump body to rotate through friction force, the liquid ring and the rotating pump body are made to be relatively static, and friction between liquid and the rotating pump body and energy loss are greatly reduced.

Description

Technical Field

[0001] This invention relates to the field of liquid ring vacuum pump technology, and in particular to a liquid ring vacuum pump with a rotatable pump body structure. Background Technology

[0002] During operation, the impeller drives the liquid to rotate, and the liquid will rub against the inner wall of the pump body, resulting in a large amount of energy loss and pump body wear. To address the aforementioned issues, Chinese Patent Application No. 202311307692.X discloses a high-efficiency liquid ring vacuum pump. The pump impeller is eccentrically mounted within the housing. An internal gear is formed on the inner wall of the pump housing, and toothed ribs are added to the radial outer edge of the impeller. Refer to the appendix of the patent specification. Figure 3 This method involves the impeller rotating while the casing rotates. Due to the internal meshing transmission structure between the impeller and the casing, the casing rotates together with the impeller. The impeller drives the casing to rotate in the same direction using the gear meshing principle, thereby reducing the relative speed between the casing and the liquid ring and reducing hydraulic losses caused by the high-speed rotation of the liquid ring. However, this gear transmission is inefficient, and there are significant losses in the gears and the liquid ring. It is necessary to develop a more efficient and wear-resistant mechanism to solve the problems existing in the current technology. Summary of the Invention

[0003] Based on the technical problems existing in the prior art, the present invention proposes a rotatable pump body structure liquid ring vacuum pump, including but not limited to a conical structure and a flat disc structure.

[0004] This invention proposes a rotatable pump body structure liquid ring vacuum pump, comprising a pump body, an impeller, a pump shaft, a pump body side cover, and a distributor. The pump shaft passes sequentially through the pump body, the distributor, and the impeller and is rotatably connected to the pump body side cover. The impeller is fixedly mounted on the pump shaft. The pump body contains a bearing and a rotating pump body surrounding the impeller. The outer ring of the bearing is fixedly connected to the inner wall of the pump body, and the inner ring of the bearing is fixedly connected to the rotating pump body. The pump shaft drives the impeller to rotate, the impeller drives the liquid ring to rotate, and the rotating liquid ring drives the rotating pump body to rotate through friction. The bearing ensures the stable rotation of the rotating pump body, keeping the liquid ring and the rotating pump body relatively stationary, greatly reducing friction and energy loss between the liquid and the rotating pump body.

[0005] Preferably, a gap seal is provided at the connection between the rotary pump body and the distributor, and a gap seal is also provided at the connection between the rotary pump body and the pump body side cover. During the rotation of the rotary pump body with the liquid ring, the gap seal between the rotary pump body and the distributor and the pump body side cover can effectively prevent the fluid inside the pump from leaking from the gap between the two, which not only avoids the pressure loss caused by the leakage of internal high-pressure fluid, but also prevents external air from seeping in and affecting the vacuum degree. At the same time, the gap seal structure does not make rigid contact with the rotating rotary pump body, which can reduce friction loss, ensure the smooth rotation of the rotary pump body, maintain the relative static state of the liquid ring and the rotary pump body, and further ensure the efficient operation of the vacuum pump.

[0006] Preferably, the pump body side cover is provided with an air inlet pipe and an air outlet pipe; the gas to be pumped enters the pump through the air inlet pipe, is compressed under the action of the impeller and liquid ring, and is then discharged through the air outlet pipe, thereby realizing the pumping and venting functions of the vacuum pump.

[0007] Preferably, a first magnet is fixedly installed on the inner wall of the pump body, and a second magnet is fixedly installed on the outer wall of the rotary pump body. The same magnetic poles of the first and second magnets are arranged opposite each other, and the first and second magnets are arranged between two bearings. When the first and second magnets replace the bearings, the repulsion between the first and second magnets generates a levitation force, causing the rotary pump body to levitate within the pump body without contacting the pump body. This eliminates mechanical friction loss and prevents subsequent bearing wear. It also allows the rotary pump body to rotate with the liquid ring. In another scenario, when the first and second magnets are used in conjunction with the bearings, it effectively reduces subsequent wear of the rolling elements inside the bearings, extends service life, and maintains the high efficiency of the vacuum pump.

[0008] Preferably, the first magnet has a semi-enclosed structure, and the second magnet has a fully enclosed structure.

[0009] Preferably, both the first magnet and the second magnet can be composed of a single magnet or composed of multiple magnets joined together.

[0010] Preferably, both the first magnet and the second magnet are permanent magnets.

[0011] Preferably, both the first magnet and the second magnet are electromagnets.

[0012] Preferably, the first magnet and the second magnet are a combination of an electromagnet and a permanent magnet.

[0013] Preferably, the inner circumference of the rotary pump body is fixedly connected with a plurality of spokes arranged in an annular array. The spokes arranged in an annular array can enhance the structural strength of the rotary pump body. At the same time, during the rotation of the liquid ring, the liquid ring will directly drive the rotary pump body to rotate synchronously by pushing the spokes, rather than mainly driving the rotary pump body to rotate by friction. This can reduce the relative motion with the liquid ring, reduce the liquid flow resistance and energy loss.

[0014] Preferably, the length direction of the spokes forms an angle of 30°-90° with the tangent direction of the spokes at the position of the rotating pump body; this angle setting allows the spokes to better adapt to the rotation direction of the liquid ring, reduces the relative friction and hydraulic loss between the liquid ring and the spokes, and further improves the operating efficiency of the vacuum pump.

[0015] Preferably, sealing plate bushings are installed at both ends of the rotary pump body. The sealing plate bushings rotate together with the rotary pump body as the liquid ring rotates. In this way, the rotary pump body with sealing plate bushings can further wrap the formed liquid ring, thereby further reducing the frictional loss between the liquid ring and the pump body.

[0016] Compared with the prior art, the present invention provides a liquid ring vacuum pump with a rotatable pump body structure, which has the following beneficial effects: 1. A rotatable pump body structure liquid ring vacuum pump, wherein the rotatable pump body structure connects the rotatable pump body to the pump body through bearings, and the rotatable pump body is rotated by the friction of the liquid ring, so that the liquid ring and the rotatable pump body are relatively stationary, which greatly reduces the friction and energy loss between the two; the bearing arrangement ensures the stability of the rotation of the rotatable pump body.

[0017] 2. A rotatable pump body structure liquid ring vacuum pump, in which the magnetic levitation structure replaces the bearing, utilizes the principle of repulsion between like magnetic poles to suspend the rotating pump body, directly achieving relative stillness between the rotating pump body and the liquid ring. When the magnetic levitation structure is used in conjunction with the bearing, it can avoid wear caused by mechanical contact of the rolling elements inside the bearing, further reducing energy loss, extending the service life of the equipment, and ensuring stable operation of the rotating pump body.

[0018] 3. A rotatable pump body structure liquid ring vacuum pump, wherein the spokes enhance the structural strength of the rotatable pump body, and the direct drive of the rotatable pump body reduces the relative motion between the liquid ring and the rotatable pump body, thereby reducing liquid flow resistance and energy loss. The spoke design with a specific angle can better adapt to the rotation direction of the liquid ring and improve operating efficiency. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of a rotatable pump body structure liquid ring vacuum pump proposed in this invention; Figure 2 This is a side view of a liquid ring vacuum pump with a rotatable pump body structure proposed in this invention. Figure 3 This is a side cross-sectional view of a liquid ring vacuum pump with a rotatable pump body structure proposed in this invention. Figure 4 This is a schematic diagram of the installation structure of a rotatable pump body structure liquid ring vacuum pump proposed in this invention, where the first and second magnets are permanent magnets. Figure 5 This is a schematic diagram of the installation structure of a rotatable pump body structure liquid ring vacuum pump proposed in this invention, where the first and second magnets are a combination of permanent magnets and electromagnets. Figure 6 This is a schematic diagram of the spoke mounting structure of a rotatable pump body structure liquid ring vacuum pump proposed in Embodiment 1 of the present invention; Figure 7 This is a schematic diagram of the spoke mounting structure of a rotatable pump body structure liquid ring vacuum pump proposed in Embodiment 2 of the present invention; Figure 8 This is a schematic diagram of the sealing plate bushing installation structure of a rotatable pump body structure liquid ring vacuum pump proposed in this invention. Figure 9 For the present invention Figure 1 A magnified structural diagram at point A.

[0020] In the diagram: 1. Pump body; 2. Rotary pump body; 3. Bearing; 4. Impeller; 5. Pump shaft; 6. Pump body side cover; 7. Inlet pipe; 8. Outlet pipe; 9. Distributor; 10. First magnet; 11. Second magnet; 12. Spokes; 13. Sealing plate bushing. Detailed Implementation

[0021] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0022] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0023] Reference Figures 1-3 and Figure 9A rotatable pump body structure liquid ring vacuum pump includes a pump body 1, an impeller 4, a pump shaft 5, a pump body side cover 6, and a distributor 9. The pump shaft 5 passes through the pump body 1, the distributor 9, and the impeller 4 in sequence and is rotatably connected to the pump body side cover 6. The impeller 4 is fixedly installed on the pump shaft 5. The pump body 1 is provided with a bearing 3 and a rotating pump body 2 surrounding the impeller 4. The outer ring of the bearing 3 is fixedly connected to the inner wall of the pump body 1, and the inner ring of the bearing 3 is fixedly connected to the rotating pump body 2. In use, the pump shaft 5 drives the impeller 4 to rotate, the impeller 4 drives the liquid ring to rotate, and the rotating liquid ring drives the rotating pump body 2 to rotate through friction. The bearing 3 ensures that the rotating pump body 2 rotates stably, so that the liquid ring and the rotating pump body 2 are relatively stationary, which greatly reduces the friction between the liquid and the rotating pump body 2 and the energy loss.

[0024] Furthermore, refer to Figure 8 The rotary pump body 2 is equipped with sealing plate bushings 13 at both ends. The sealing plate bushings 13 will rotate together with the rotary pump body 2 as the liquid flows. In this way, the rotary pump body 2 with sealing plate bushings 13 can further wrap the formed liquid ring, thereby further reducing the friction loss between the liquid ring and the pump body 1.

[0025] Among them, a gap seal is provided at the position where the rotary pump body 2 is connected to the distributor 9, and a gap seal is also provided at the position where the rotary pump body 2 is connected to the pump body side cover 6. During use, as the rotary pump body 2 rotates with the liquid ring, the gap seal between it and the distributor 9 and the pump body side cover 6 effectively prevents the fluid inside the pump from leaking out from the gap between them. This avoids pressure loss caused by leakage of internal high-pressure fluid and prevents external air from seeping in and affecting the vacuum level. At the same time, the gap seal structure does not make rigid contact with the rotating rotary pump body 2, which can reduce friction loss, ensure the smooth rotation of the rotary pump body 2, maintain the relative static state between the liquid ring and the rotary pump body 2, and further ensure the efficient operation of the vacuum pump.

[0026] The pump body side cover 6 is equipped with an air inlet pipe 7 and an air outlet pipe 8; In use, the gas to be pumped enters the pump through the inlet pipe 7, is compressed by the impeller 4 and the liquid ring, and is then discharged through the outlet pipe 8, thus realizing the pumping and exhaust functions of the vacuum pump.

[0027] In Example 1, refer to Figure 6 Multiple spokes 12 arranged in a ring array are fixedly connected to the inner circumference of the rotary pump body 2. In use, the spokes 12 distributed in a ring array can enhance the structural strength of the rotary pump body 2. At the same time, during the rotation of the liquid ring, the liquid ring will directly drive the rotary pump body 2 to rotate synchronously by pushing the spokes 12, rather than mainly driving the rotary pump body 2 to rotate by friction. This can reduce the relative motion with the liquid ring, reduce the liquid flow resistance, energy loss and frictional heat.

[0028] In Example 2, refer to Figure 6 and Figure 7 The length direction of the spoke 12 forms an angle of 30°-90° with the tangent direction of the position of the spoke 12 on the rotary pump body 2; In use, this angle setting allows the spokes 12 to better adapt to the rotation direction of the liquid ring, reducing the relative friction and hydraulic loss between the liquid ring and the spokes 12, and further improving the operating efficiency of the vacuum pump.

[0029] Furthermore, a first magnet 10 is fixedly installed on the inner wall of the pump body 1, and a second magnet 11 is fixedly installed on the outer wall of the rotary pump body 2. The same magnetic poles of the first magnet 10 and the second magnet 11 are arranged opposite to each other, and the first magnet 10 and the second magnet 11 are arranged between two bearings 3. In use, when the first magnet 10 and the second magnet 11 replace the bearing 3, the first magnet 10 and the second magnet 11 generate a levitation force due to the repulsion of their like magnetic poles, causing the rotary pump body 2 to suspend inside the pump body 1 without contacting it. There is no mechanical friction loss, so there will be no problem of subsequent wear of the bearing 3. At the same time, the rotary pump body 2 can also rotate with the liquid ring. In another case, when the first magnet 10 and the second magnet 11 are used together with the bearing 3, the subsequent wear of the rolling elements inside the bearing 3 can be effectively reduced, the service life can be extended, and the high efficiency of the vacuum pump can be maintained.

[0030] It should be noted that the arrangement and structure of the first magnet 10 and the second magnet 11 are as follows: Figure 4 and Figure 5 To explain, the first magnet 10 has a semi-enclosed structure, which is not limited to a semicircle, a minor arc, a part of an ellipse, or a part of a polygon, and its cross-sectional shape is symmetrical. The second magnet 11 has a fully enclosed structure, such as a circular structure. Both the first magnet 10 and the second magnet 11 can be composed of a single magnet or composed of multiple magnets spliced ​​together. It should also be noted that the first magnet 10 and the second magnet 11 can be permanent magnets, electromagnets, or a combination of both. If it is a permanent magnet, its own magnetism can generate a uniform radial repulsive force to ensure that the rotary pump body 2 is stably suspended in the pump body 1. If it is an electromagnet, the magnetic field strength can be controlled by adjusting the current, and the radial repulsive force can be flexibly adjusted to adapt to the suspension requirements under different working conditions. If it is a combination of permanent magnets and electromagnets, it can rely on the permanent magnets to provide basic repulsive force, and can also use the electromagnets for dynamic fine-tuning to further optimize the suspension stability and adaptability.

[0031] Working principle: Pump shaft 5 drives impeller 4 to rotate, impeller 4 drives liquid ring to rotate, and the rotating liquid ring drives rotating pump body 2 to rotate through friction. Bearing 3 ensures stable rotation of pump body 2, keeping the liquid ring and pump body 2 relatively stationary, reducing friction and energy loss. Seals at the gaps between pump body 1 and distributor 9, and between pump body 1 and pump body side cover 6, prevent fluid leakage inside the pump and maintain stable working pressure. Gas to be pumped enters the pump through inlet pipe 7, is compressed under the action of impeller 4 and liquid ring, and is then discharged through outlet pipe 8. The repulsion between the same magnetic poles of the first magnet 10 and the second magnet 11 generates a levitation force, causing the rotary pump body 2 to levitate within the pump body 1. It can be used as a replacement for the bearing 3 or in conjunction with the bearing 3. The spokes 12 on the inner wall of the rotary pump body 2 are pushed when the liquid ring rotates, causing the rotary pump body 2 to rotate synchronously, reducing relative motion loss and frictional heat.

[0032] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A rotatable pump body structure liquid ring vacuum pump, comprising a pump body (1), an impeller (4), a pump shaft (5), a pump body side cover (6), and a distributor (9), characterized in that, The pump shaft (5) passes through the pump body (1), distributor (9) and impeller (4) in sequence and is rotatably connected to the pump body side cover (6). The impeller (4) is fixedly installed on the pump shaft (5). The pump body (1) is provided with a bearing (3) and a rotating pump body (2) surrounding the impeller (4). The outer ring of the bearing (3) is fixedly connected to the inner wall of the pump body (1), and the inner ring of the bearing (3) is fixedly connected to the rotating pump body (2). The inner wall of the pump body (1) is fixedly installed with a first magnet (10), and the outer wall of the rotary pump body (2) is fixedly installed with a second magnet (11). The same magnetic poles of the first magnet (10) and the second magnet (11) are arranged opposite to each other, and the first magnet (10) and the second magnet (11) are arranged between two bearings (3).

2. The rotatable pump body structure liquid ring vacuum pump according to claim 1, characterized in that, A gap seal is provided at the position where the rotary pump body (2) is connected to the distributor (9), and a gap seal is also provided at the position where the rotary pump body (2) is connected to the pump body side cover (6).

3. The rotatable pump body structure liquid ring vacuum pump according to claim 1, characterized in that, The pump body side cover (6) is provided with an air inlet pipe (7) and an air outlet pipe (8).

4. A rotatable pump body structure liquid ring vacuum pump according to claim 1, characterized in that, The first magnet (10) has a semi-enclosed structure, and the second magnet (11) has a fully enclosed structure.

5. A rotatable pump body structure liquid ring vacuum pump according to claim 1, characterized in that, Both the first magnet (10) and the second magnet (11) can be composed of a single magnet or composed of multiple magnets joined together.

6. A rotatable pump body structure liquid ring vacuum pump according to claim 1, characterized in that, Both the first magnet (10) and the second magnet (11) are permanent magnets.

7. A rotatable pump body structure liquid ring vacuum pump according to claim 1, characterized in that, Both the first magnet (10) and the second magnet (11) are electromagnets.

8. A rotatable pump body structure liquid ring vacuum pump according to claim 1, characterized in that, The first magnet (10) and the second magnet (11) are a combination of an electromagnet and a permanent magnet.

9. A rotatable pump body structure liquid ring vacuum pump according to claim 1, characterized in that, The inner circumference of the rotary pump body (2) is fixedly connected with multiple spokes (12) arranged in an annular array.

10. A rotatable pump body structure liquid ring vacuum pump according to claim 9, characterized in that, The length direction of the spoke (12) forms an angle of 30°-90° with the tangent direction of the position of the spoke (12) on the rotating pump body (2).

11. A rotatable pump body structure liquid ring vacuum pump according to claim 1, characterized in that, The rotary pump body (2) is equipped with sealing bushings (13) at both ends.

12. A rotatable pump body structure liquid ring vacuum pump according to claim 1, characterized in that, The pump shaft (5) drives the impeller (4) to rotate, and the impeller (4) drives the liquid ring to rotate at high speed. The rotating liquid ring drives the rotating pump body (2) to rotate through friction, so that the liquid ring and the rotating pump body (2) are relatively stationary, thereby reducing friction.

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