Magnetic suspension vacuum pump diffuser structure

Abstract

The utility model belongs to the field of diffuser structures, and particularly relates to a magnetic suspension vacuum pump diffuser structure which comprises a diffuser body, a first connecting end and a second connecting end are arranged at the two ends of the diffuser body respectively, the first connecting end is connected with a vacuum pump, and the second connecting end is connected with an external device. At least four reinforcing ribs are arranged on the outer side wall of the diffuser body in the circumferential direction of the diffuser body and located between the first connecting end and the second connecting end, the two ends of each reinforcing rib are connected with the first connecting end and the second connecting end respectively, and transition sections are arranged between the connecting positions of the reinforcing ribs and the diffuser body and between the connecting positions of the reinforcing ribs and the first connecting end and between the second connecting end and the diffuser body. Lifting ring holes are formed in the reinforcing ribs in a penetrating mode, and a circulation cavity communicated with a vacuum pump is formed in the diffuser body. The hoisting device is reasonable in structural design, high in strength and capable of achieving flexible hoisting at the same time.

Description

Technical Field

[0001] The utility model belongs to the field of diffuser structures, and specifically relates to a diffuser structure of a magnetic levitation vacuum pump. Background Technique

[0002] Compared with the traditional water ring vacuum pump, the magnetic levitation vacuum pump has the advantages of high efficiency, energy saving, fast response, strong stability, low noise and convenient maintenance, and can be widely used in industries such as chemical engineering, thermoelectric power, and food.

[0003] However, the complex working environment may cause damage to the equipment, reduction of working efficiency and shortening of service life; for example, when the magnetic levitation vacuum pump is applied to the chemical industry, its working gas is usually high-temperature, highly corrosive, and humid gas with high requirements for vacuum degree. Although there is a gas-water separator for preliminary washing and drying of the gas, it is still difficult to ensure the purity of the gas. The high-temperature, high vacuum degree (which will exert a force on the pneumatic components), highly corrosive, and humid gas first enters the primary diffuser, and then is transported out through the air flow channel, two-stage series pipeline, secondary diffuser, secondary air flow channel, etc.

[0004] Thus, it can be seen that under such harsh working conditions, the diffuser of the magnetic levitation vacuum pump faces severe tests. In order to ensure the stable operation and long service life of the magnetic levitation vacuum pump, the diffuser needs to have high strength to withstand gas pressure and mechanical stress; it needs to have corrosion resistance to resist the erosion of corrosive gases; it needs to have high-temperature resistance to remain stable in a high-temperature working gas environment; and in order to facilitate installation, maintenance and reduce the overall weight of the equipment, it is also required that the diffuser has a simple structure and light weight.

[0005] As Figure 1 shown, the existing vacuum pump diffuser structure has low strength and is prone to deformation, which affects the gas diffusion effect and the performance of the vacuum pump.

[0006] In addition, only one lifting ring is installed on the existing vacuum pump diffuser. One lifting ring limits the angle and direction selection of the diffuser during lifting, and it is impossible to flexibly select different lifting points according to the actual situation, which brings many inconveniences to the lifting operation and reduces the working efficiency. Content of the Utility Model

[0007] The main technical problem to be solved by the utility model is to provide a diffuser structure of a magnetic levitation vacuum pump with reasonable structural design, which not only has high strength but also realizes flexible lifting.

[0008] To solve the above technical problems, the utility model provides the following technical solutions:

[0009] A diffuser structure of a magnetic levitation vacuum pump, comprising a diffuser body. A first connection end and a second connection end are respectively arranged at both ends of the diffuser body. The first connection end is connected to the vacuum pump, and the second connection end is connected to an external device. At least four reinforcing ribs are arranged on the outer side wall of the diffuser body along its circumference and between the first connection end and the second connection end. Both ends of the reinforcing ribs are respectively connected to the first connection end and the second connection end. A transition section is provided between the connection points of the reinforcing ribs with the first connection end, the second connection end and the diffuser body. Hoisting ring holes are all penetrated through the reinforcing ribs. A flow cavity communicated with the vacuum pump is arranged in the diffuser body.

[0010] The following is the further optimization of the above technical solution by the present utility model:

[0011] The transition section is an arc-shaped groove, and one end of the arc-shaped groove is tangent to the outer side surface of the reinforcing rib, and the other end of the arc-shaped groove is tangent to the outer side surface of the diffuser body.

[0012] Further optimization: The diffuser body is made of stainless steel.

[0013] Further optimization: The wall thickness of the diffuser body is 5-7 mm.

[0014] Further optimization: The flow cavity includes a first air inlet section, a second air inlet section, and an air outlet section that are connected in sequence.

[0015] Further optimization: The inner diameter of the first air inlet section gradually decreases along the gas flow direction, and the inner diameter of the second air inlet section remains unchanged.

[0016] Further optimization: The inner diameter of the air outlet section gradually increases along the gas flow direction.

[0017] Further optimization: Both the first air inlet section and the air outlet section are arc-shaped sections, and the second air inlet section is a straight section.

[0018] The present utility model will be further described below in conjunction with the drawings and embodiments. Description of the Drawings

[0019] Figure 1 It is a schematic structural diagram of the vacuum pump diffuser in the background technology of the present utility model;

[0020] Figure 2 It is a schematic overall structural diagram of the embodiment of the present utility model;

[0021] Figure 3 It is a cross-sectional view of the embodiment of the present utility model.

[0022] In the figure: 1 - diffuser body; 2 - first connection end; 3 - second connection end; 4 - reinforcing rib; 5 - arc-shaped groove; 6 - lifting ring hole; 7 - flow cavity; 71 - first air intake section; 72 - second air intake section; 73 - air outlet section. Detailed implementation manner

[0023] As Figure 2-3 shown, a structure of a magnetic levitation vacuum pump diffuser includes a diffuser body 1. At both ends of the diffuser body 1, a first connection end 2 and a second connection end 3 are respectively arranged. The first connection end 2 is connected to a vacuum pump, and the second connection end 3 is connected to an external device. Along the circumferential direction of the outer side wall of the diffuser body 1 and between the first connection end 2 and the second connection end 3, at least four reinforcing ribs 4 are arranged. Both ends of the reinforcing ribs 4 are respectively connected to the first connection end 2 and the second connection end 3. A transition section is provided between the joints of the reinforcing ribs 4 with the first connection end 2, the second connection end 3, and the diffuser body 1. Lifting ring holes 6 are all penetrated through the reinforcing ribs 4. A flow cavity 7 communicated with the vacuum pump is arranged inside the diffuser body 1.

[0024] With such a design, first of all, the reinforcing ribs 4 are arranged on the outer side wall of the diffuser body 1, and both ends of the reinforcing ribs 4 are respectively connected to the first connection end 2 and the second connection end 3, which can significantly improve the overall structural strength and rigidity of the diffuser. This enables the diffuser to better withstand internal pressure, external impact, and various loads during the installation and use process, reduces the risk of deformation and damage, and extends the service life of the diffuser.

[0025] Secondly, lifting ring holes 6 are penetrated through the middle position of the reinforcing ribs 4, which provides convenience for the lifting and installation of the diffuser. During the installation and maintenance process, the diffuser can be accurately and safely moved and positioned by using lifting equipment through the lifting ring holes 6, improving the operation convenience and work efficiency. At the same time, it also reduces the risk of damage that may be caused during the manual handling process.

[0026] A transition section is provided between the joints of the reinforcing ribs 4 with the first connection end 2, the second connection end 3, and the diffuser body 1, which can effectively reduce the stress concentration phenomenon. Under the action of force, the transition section can make the force evenly distributed and transmitted, reducing the possibility of cracks and fractures generated at the joints due to stress concentration, and further improving the structural reliability and stability of the diffuser.

[0027] The transition section is an arc-shaped groove 5, and one end of the arc-shaped groove 5 is tangent to the outer side surface of the reinforcing rib 4, and the other end of the arc-shaped groove 5 is tangent to the outer side surface of the diffuser body 1.

[0028] With such a design, the arc-shaped groove 5 is tangent to the outer side surface of the reinforcing rib 4 and the outer side surface of the diffuser body 1, which can achieve a smooth transition of stress at the connection part, greatly disperse the stress, significantly reduce the risk of structural fatigue and damage caused by stress concentration, and enhance the overall structural strength and durability of the diffuser.

[0029] In this embodiment, the diffuser body 1 is made of stainless steel.

[0030] With such a design, firstly, stainless steel has good corrosion resistance and can be used for a long time in humid, chemically active or harsh working environments without rusting or being corroded easily, thus extending the service life of the diffuser; secondly, stainless steel has relatively high strength and hardness, can withstand large pressures, impacts and vibrations, and is not easily deformed or damaged, ensuring the stability and reliability of the diffuser during operation; in high-temperature environments, stainless steel can still maintain the stability of its structure and performance, making it suitable for some vacuum pump systems with relatively high working temperatures; in addition, the surface of stainless steel is smooth, not prone to bacteria growth and dirt accumulation, facilitating cleaning and maintenance, and meeting some application scenarios with high hygiene requirements.

[0031] The wall thickness of the diffuser body 1 is 5 - 7 mm.

[0032] The flow cavity 7 includes a first intake section 71, a second intake section 72, and an outlet section 73 that are connected in sequence.

[0033] The inner diameter of the first intake section gradually decreases along the gas flow direction, and the inner diameter of the second intake section 72 remains unchanged.

[0034] The inner diameter of the outlet section 73 gradually increases along the gas flow direction.

[0035] With such a design, the inner diameter of the first intake section 71 gradually decreases, enabling the gas flow entering the flow cavity 7 from the gas inlet of the flow cavity 7 to gradually accelerate. The inner diameter of the second intake section 72 remains unchanged, so that the flow rate of the gas entering the flow cavity 7 can stabilize. The inner diameter of the outlet section 73 gradually increases from small to large, enabling the gas to gradually release pressure in the outlet section 73 and avoiding sudden changes in the flow rate of the outflowing gas.

[0036] Both the first intake section 71 and the outlet section 73 are arc-shaped sections, and the second intake section 72 is a straight section.

[0037] From this, it can be seen that the gas gradually accelerates in the first intake section 71, the accelerated gas stabilizes in the second intake section 72, and the pressure is gradually released and the gas gradually decelerates in the outlet section 73.

[0038] For those of ordinary skill in the art, according to the teachings of the present utility model, without departing from the principles and spirit of the present utility model, changes, modifications, substitutions, and variations made to the embodiments still fall within the protection scope of the present utility model.

Claims

1. A diffuser structure of a magnetic levitation vacuum pump, comprising a diffuser body (1), with a first connection end (2) and a second connection end (3) respectively arranged at both ends of the diffuser body (1). The first connection end (2) is connected to the vacuum pump, and the second connection end (3) is connected to an external device, characterized in that: On the outer side wall of the diffuser body (1), at least four reinforcing ribs (4) are arranged circumferentially between the first connection end (2) and the second connection end (3). Both ends of the reinforcing rib (4) are respectively connected to the first connection end (2) and the second connection end (3). A transition section is provided between the connection points of the reinforcing rib (4) with the first connection end (2), the second connection end (3) and the diffuser body (1). A lifting ring hole (6) is penetrated through each of the reinforcing ribs (4). A flow cavity (7) communicating with a vacuum pump is arranged in the diffuser body (1).

2. The structure of a diffusion device of a magnetic levitation vacuum pump according to claim 1, wherein: The transition section is an arc-shaped groove (5), and one end of the arc-shaped groove (5) is tangent to the outer side surface of the reinforcing rib (4), and the other end of the arc-shaped groove (5) is tangent to the outer side surface of the diffuser body (1).

3. The structure of a diffusion device of a magnetic levitation vacuum pump according to claim 2, wherein: The diffuser body (1) is made of stainless steel material.

4. A diffuser structure of a magnetic levitation vacuum pump according to claim 3, characterized in that: The wall thickness of the diffuser body (1) is 5 mm - 7 mm.

5. A diffuser structure of a magnetic levitation vacuum pump according to claim 4, characterized in that: The flow cavity (7) includes a first air intake section (71), a second air intake section (72), and an air outlet section (73) connected in sequence.

6. The structure of a diffuser for a magnetic levitation vacuum pump according to claim 5, wherein: The inner diameter of the first air intake section (71) gradually becomes smaller along the gas flow direction, and the inner diameter of the second air intake section (72) remains unchanged.

7. The structure of a diffusion device of a magnetic levitation vacuum pump according to claim 6, characterized in that: The inner diameter of the air outlet section (73) gradually becomes larger along the gas flow direction.

8. The structure of a diffusion device of a magnetic levitation vacuum pump according to claim 7, wherein: Both the first air intake section (71) and the air outlet section (73) are arc sections, and the second air intake section (72) is a straight section.

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