Stator and vacuum pump

Abstract

The application discloses a kind of stator and vacuum pump, it is related to vacuum pump technical field, including stator main body and purging module, the stator main body inside is limited to the compression cavity for accommodating rotor, the purging module is set to the outer wall of the stator main body, and the purging module has gas inlet connector, the inside of the purging module is provided with inflow chamber, the inflow chamber and the compression cavity are communicated by blowing gas connector.The application is introduced into inflow chamber by setting blowing gas module, directly introduced into compression cavity by blowing gas connector, effectively relieve the gas reflux caused pipeline blockage, simplify the pipeline structure of gas path purging, to reduce the processing difficulty.

Description

Technical Field

[0001] This application relates to the field of vacuum pump technology, specifically to a stator and a vacuum pump. Background Technology

[0002] A vacuum pump is a device that uses mechanical, physical, or chemical methods to draw gas from a closed space to create a vacuum environment. In some processes that use vacuum pumps, it is necessary to purge the pump with high-temperature gas.

[0003] Existing patent CN202310390650.0, entitled "Stator and its Manufacturing Method and Vacuum Pump," discloses a stator comprising a wall having an outer peripheral surface, a first end wall, and a second end wall; the first end wall and the second end wall are disposed opposite to each other; the two opposite ends of the outer peripheral surface are respectively connected to the first end wall and the second end wall; the wall defines a compression cavity for accommodating a rotor; the compression cavity has a cavity wall extending from the first end wall to the second end wall; a gas pipeline is constructed inside the wall, the gas pipeline having a gas inlet and a gas outlet; the gas inlet is disposed on the outer peripheral surface, and the gas outlet is disposed on the cavity wall; the gas pipeline is arranged around the compression cavity to utilize the residual heat of the stator to heat the purge gas of the gas pipeline.

[0004] The stator requires the machining of a surrounding gas pipeline, which is difficult and detrimental to production. Utility Model Content

[0005] The main objective of this application is to provide a stator and a vacuum pump that address the aforementioned technical problems.

[0006] The technical solution adopted in this application is as follows:

[0007] First aspect:

[0008] A stator includes a stator body and a purging module. The stator body defines a compression chamber for accommodating a rotor. The purging module is disposed on the outer wall of the stator body and has an air inlet connector. The purging module has an inflow chamber inside and the inflow chamber and the compression chamber are interconnected through the air purging connector.

[0009] Optionally, the air blowing connector is provided with multiple connectors to blow air to different locations of the compression chamber.

[0010] Optionally, the stator body wall and the purge module wall are provided with blind holes of the same diameter for installing the air blowing connector. The blind hole on the purge module side extends into the inlet chamber side to form a throttling hole, and the blind hole on the stator body side extends into the compression chamber side to form a purge hole.

[0011] Optionally, a conical throttling cap is formed on one side of the inlet chamber of the throttling orifice.

[0012] Optionally, the diameter of the throttling orifice is less than the diameter of the purge orifice, which is less than the diameter of the blind orifice.

[0013] Optionally, a backflow chamber is formed inside the air blowing connector, and a sealing ring is provided between the air blowing connector and the stator body and the purging module.

[0014] Optionally, the purging module is disposed on the top or side surface of the stator body.

[0015] Optionally, when the purging module is disposed on the side of the stator body, a partition is provided in the inlet chamber to divide the inlet chamber into an upper chamber and a lower chamber.

[0016] The second aspect:

[0017] A vacuum pump includes a rotor and the aforementioned stator, the rotor being disposed within the compression chamber.

[0018] Compared with the prior art, the beneficial effects of this application are:

[0019] In the technical solution of this application, after the gas is introduced into the inlet chamber by setting the air blowing module, it is directly introduced into the compression chamber through the air blowing connector, which simplifies the pipeline structure of the air purging, effectively alleviates the pipeline blockage caused by gas backflow, and thus reduces the processing difficulty. Attached Figure Description

[0020] Figure 1 A schematic diagram of the stator (with the purging module located on the top surface) provided in an embodiment of this application;

[0021] Figure 2 for Figure 1 A sectional view;

[0022] Figure 3 A schematic diagram of the stator (with the purge module located on the side) provided in an embodiment of this application;

[0023] Figure 4 for Figure 3 A diagram showing the internal structure of the purging module.

[0024] Explanation of the labels in the attached drawings:

[0025] 1-Stator body, 101-Compression chamber, 2-Purge module, 201-Inlet chamber, 2011-Upper chamber, 2012-Lower chamber, 3-Inlet connector, 4-Blower connector, 401-Reverse flow chamber, 5-Sealing ring, 6-Throttle orifice, 7-Throttle cap, 8-Purge hole, 9-Baffle plate. Detailed Implementation

[0026] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0027] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0028] In this application, unless otherwise expressly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0029] Furthermore, if the embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0030] See attached document Figures 1 to 4As shown, this application embodiment provides a stator, including a stator body 1 and a purging module 2. The stator body 1 defines a compression chamber 101 for accommodating a rotor. The purging module 2 is disposed on the outer wall of the stator body 1 and has an air inlet connector 3. The purging module 2 has an inflow chamber 201 inside. The inflow chamber 201 and the compression chamber 101 are interconnected through an air blowing connector 4.

[0031] Compared to complex gas path designs, the technical solution provided in this embodiment simplifies the gas purging pipeline structure by introducing gas into the inlet chamber 201 through the blowing module and then directly introducing it into the compression chamber 101 through the blowing connector 4. The entire gas pipeline structure is simple, thereby reducing the processing difficulty.

[0032] Specifically:

[0033] like Figures 1 to 4 As shown, to assemble the purging module 2 and the stator body 1 into one unit via the air-blowing connector 4, the walls of the stator body 1 and the purging module 2 are provided with blind holes of the same diameter for installing the air-blowing connector 4. The air-blowing connector 4 is inserted into the blind hole, and sealing rings 5 ​​are provided at both ends of the air-blowing connector 4. The sealing rings 5 ​​are used to ensure that the air-blowing connector 4 is tightly fitted with the stator body 1 and the purging module 2 to form a seal. Alternatively, the air-blowing connector 4 can be installed in the blind hole by a threaded connection. The air-blowing connector 4 has a central hole, which forms a backflow chamber 401. After the air-blowing connector 4 is assembled into the blind hole, the blind hole on the side of the purging module 2 extends into the inflow chamber 201 to form a throttling hole 6, and the blind hole on the side of the stator body 1 extends into the compression chamber 101 to form a purging hole 8.

[0034] In the above embodiment, air is blown into the compression chamber 101 through the air inlet connector 3. After the airflow enters the air blowing module, the inlet chamber 201 can stabilize the pressure, reducing the formation of a high-pressure jet inside the air blowing connector 4. After the airflow enters the air blowing connector 4, it blows into the compression chamber 101 through the purging hole 8. Additionally, when the gas in the compression chamber 101 flows back towards the inlet chamber 201, the backflow chamber 401 can mitigate the backflow impact. Furthermore, when the backflow enters the inlet chamber 201 through the throttling hole 6, the larger inlet chamber 201 can deposit dust, preventing further backflow of dust to the air inlet connector 3.

[0035] In a preferred embodiment, such as Figure 2 and Figure 4 As shown, there are multiple air blowing connectors 4. It is easy to understand that the dispersed arrangement of multiple air blowing connectors 4 can achieve purging of different positions of the compression chamber 101, which is beneficial to improving the purging effect.

[0036] Furthermore, as described above, a conical throttling cap 7 is formed on one side of the inlet chamber 201 of the throttling orifice 6. It is easy to understand that since the conical throttling cap 7 has a slope, when backflow occurs, it can prevent the crushed material from accumulating at the inlet of the throttling orifice 6.

[0037] In this embodiment, the purging module 2 can be optionally located on the top surface of the stator body 1 (e.g., ...). Figure 1 and Figure 2 (as shown) or side (such as) Figure 3 and Figure 4 As shown), specifically, when the purging module 2 is located on the side of the stator body 1, a partition 9 is provided in the inlet chamber 201 to divide the inlet chamber 201 into an upper chamber 2011 and a lower chamber 2012. A gap is maintained between the partition 9 and the inlet chamber 201 to allow dust to settle into the lower chamber 2011. The advantage of this design is that when backflow occurs, the dust flowing back into the inlet chamber 201 will be deposited in the lower chamber 2012 due to gravity. If the backflow is high-pressure gas, it will cause the airflow inside the entire inlet chamber 201 to be turbulent, and the dust will run around in the inlet chamber, affecting other pipelines. Therefore, by setting the partition 9, most of the turbulent airflow will directly affect the upper chamber 2011, while the lower chamber 2012 is less affected by the turbulent airflow, thereby reducing the airflow to other pipelines and reducing dust pollution of other pipelines.

[0038] In contrast, when the purging module 2 is located on the top surface of the stator body 1, due to the low height of the purging module 2, it is difficult to add a baffle inside the purging module 2 to allow the dust to sink to the bottom of the inlet chamber 201 by gravity. Therefore, when the purging module 2 is located on the top surface of the stator body 1, no baffle structure is designed. However, when the purging module 2 is located on the side of the stator body 1, the width of the purging module 2 is used as the height for the design, thus providing a higher space for the dust to sink to the bottom of the inlet chamber 201 by gravity. Therefore, a baffle structure is designed.

[0039] As can be seen from the above, the stator provided in this application embodiment simplifies the pipeline structure for cavity gas purging, has a simple structure, is easy to process, and strengthens and optimizes gas pressure stabilization and gas backflow suppression, making it more practical. By purging the cavity with gas, it alleviates the accumulation of process dust and the blockage of the rotor, and dilutes the corrosive gases compressed in the process, thereby reducing the corrosion rate of the stator cavity.

[0040] Meanwhile, this application also provides a vacuum pump, including a rotor and a stator, wherein the stator adopts the structure of some or all of the foregoing embodiments, and will not be described in detail here. The rotor is disposed in a compression chamber. In the embodiment, the compression chamber is generally figure-eight shaped. Each compression chamber has two rotors for compressing gas.

[0041] The above description is only a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A stator, characterized in that, The device includes a stator body and a purging module. The stator body has a compression chamber defined inside for accommodating the rotor. The purging module is disposed on the outer wall of the stator body and has an air inlet connector. The purging module has an inflow chamber inside and the inflow chamber and the compression chamber are interconnected through the air blowing connector.

2. The stator according to claim 1, characterized in that, The air blowing connector is provided with multiple parts to blow air to different positions of the compression chamber.

3. The stator according to claim 1, characterized in that, The stator body wall and the purge module wall are provided with blind holes of the same diameter for installing the air blowing connector. The blind hole on the purge module side extends into the inlet chamber side to form a throttling hole, and the blind hole on the stator body side extends into the compression chamber side to form a purge hole.

4. The stator according to claim 3, characterized in that, The throttling orifice is located on one side of the inlet chamber and has a conical throttling cap.

5. The stator according to claim 3, characterized in that, The diameter of the throttling orifice is less than the diameter of the purging orifice, which is less than the diameter of the blind orifice.

6. The stator according to claim 1, characterized in that, The air blowing connector has a backflow chamber inside, and a sealing ring is provided between the air blowing connector, the stator body, and the purging module.

7. The stator according to claim 1, characterized in that, The purging module is disposed on the top or side surface of the stator body.

8. The stator according to claim 7, characterized in that, When the purging module is located on the side of the stator body, a partition is provided in the inflow chamber to divide the inflow chamber into an upper chamber and a lower chamber.

9. A vacuum pump, characterized in that, It includes a rotor and a stator as described in any one of claims 1-8, wherein the rotor is disposed within the compression chamber.

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