Exhaust structure and sliding vane air compressor

Abstract

This utility model provides an exhaust structure and a vane-type air compressor, belonging to the field of air compressor technology. It includes an oil reservoir, an end cover, and an oil-gas separator. The oil reservoir contains a stator-rotor vane assembly for compressed air. A first oil-impact chamber is formed between the portion of the oil reservoir above the internal liquid level and the outer periphery of the stator-rotor vane assembly. The end cover is fixedly connected to the end wall of the oil reservoir, and a second oil-impact chamber is provided inside the end cover, communicating with the first oil-impact chamber. The oil-gas separator is connected to the end cover and communicates with the second oil-impact chamber. The high-pressure air discharged from the stator-rotor vane assembly sequentially passes through the first oil-impact chamber, the second oil-impact chamber, and the oil-gas separator. The exhaust structure and vane-type air compressor provided by this utility model allow the high-pressure air to undergo two collisions to remove oil before entering the oil-gas separator during the exhaust process. Compared to methods that rely entirely on the oil-gas separator, this significantly reduces the oil content in the exhaust gas.

Description

Technical Field

[0001] This utility model belongs to the field of air compressor technology, specifically relating to an exhaust structure and a vane air compressor. Background Technology

[0002] As a common type of air compressor, the vane air compressor operates by creating a continuously changing compression chamber between a ring of vanes telescopically mounted on the rotor and the inner wall of the stator. This operating method results in a relatively smooth air compression process with minimal gas pulsation, thus offering significant advantages in vibration and noise control. However, the vane air compressor requires sufficient lubricating oil to lubricate the vanes during operation. Consequently, the air compression process involves direct contact with the lubricating oil, leading to an increase in the oil content of the exhaust gas. Although existing technologies employ oil-gas separators installed in the exhaust passage to reduce the oil content to some extent, this still falls short of applications with stringent requirements for compressed air oil content, necessitating further improvements. Utility Model Content

[0003] This utility model provides an exhaust structure and a vane air compressor, aiming to reduce the oil content in the exhaust of the vane air compressor.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: Firstly, an exhaust structure is provided, comprising:

[0005] An oil reservoir is provided with a stator and rotor vane assembly for compressed air. The portion of the oil reservoir above the liquid level inside it forms a first oil impact chamber with the outer periphery of the stator and rotor vane assembly.

[0006] An end cap is fixedly connected to the end wall of the oil reservoir. The end cap has a second oil impact chamber inside, which is connected to the first oil impact chamber.

[0007] An oil-gas separator is connected to the end cap and communicates with the second oil-impact chamber;

[0008] The high-pressure air discharged from the stator and rotor vane assembly passes sequentially through the first oil-impact chamber, the second oil-impact chamber, and the oil-gas separator.

[0009] In conjunction with the first aspect, in one possible implementation, the outer periphery of the stator and rotor vane assembly and the inner wall of the oil reservoir have a plurality of first oil-impacting plates that are distributed at intervals and crosses with each other, and the first oil-impacting chamber forms a curved first exhaust path based on each of the first oil-impacting plates.

[0010] In some embodiments, the stator and rotor vane assembly has a first exhaust passage that extends obliquely upward above the liquid surface and connects to a first oil-impact chamber, and the cavity wall of the first oil-impact chamber is provided with a first exhaust hole for connecting to a second oil-impact chamber; wherein the first exhaust hole and the first exhaust passage are respectively located at both ends of the first exhaust path.

[0011] For example, the upper and lower walls of the second oil-impact chamber have a plurality of second oil-impact plates that are distributed at intervals and crosses with each other, and the second oil-impact chamber forms a curved second exhaust path based on each of the second oil-impact plates.

[0012] For example, the end cap is provided with a second exhaust passage and a third exhaust passage that are connected to the second oil-impact chamber at both ends of the second exhaust path; the second exhaust passage is connected to the first exhaust port, and the third exhaust passage is connected to the oil-gas separator.

[0013] In one possible implementation, the oil-gas separator is inverted and mounted on the top wall of the end cap. The oil-gas separator has a central exhaust pipe and an oil-blocking chamber surrounding the central exhaust pipe. The oil-blocking chamber is connected to a third exhaust channel, and the central exhaust pipe is used to discharge clean, high-pressure air.

[0014] In some embodiments, the end cap is provided with a fourth exhaust passage, which is connected to the central exhaust pipe, and an exhaust valve is provided in the fourth exhaust passage.

[0015] For example, the side wall of the end cap is provided with a pressure gauge that communicates with the fourth exhaust passage.

[0016] For example, the two adjacent sidewalls of the end cap are respectively provided with a second vent hole and a third vent hole. Both the second vent hole and the third vent hole are connected to the fourth vent channel. Both the second vent hole and the third vent hole can be detachably connected with plugs.

[0017] The beneficial effects of the exhaust structure provided by this utility model are as follows: Compared with the prior art, in the exhaust structure of this utility model, the stator and rotor vane assembly discharges high-pressure air into the first oil-impact chamber, causing collisions that detach most of the oil mist from the high-pressure gas. This completes the first oil-gas separation as the high-pressure air passes through the first oil-impact chamber. Then, as the high-pressure air passes through the second oil-impact chamber, it undergoes another collision to remove oil, completing the second oil-gas separation. Finally, it enters the oil-gas separator for the third oil-gas separation. Throughout the exhaust process, the high-pressure air undergoes two collisions to remove oil before entering the oil-gas separator. Compared to the prior art's method of solely relying on the oil-gas separator for high-pressure air oil removal, this significantly reduces the oil content in the exhaust, enabling the vane air compressor to meet the application requirements of applications with strict requirements for high-pressure air oil content. This is beneficial for increasing the market share of vane air compressors.

[0018] Secondly, this utility model embodiment also provides a vane air compressor, including the above-mentioned exhaust structure.

[0019] The beneficial effects of the sliding vane air compressor provided by this utility model are as follows: Compared with the prior art, the sliding vane air compressor of this utility model adopts the above-mentioned exhaust structure. In the entire exhaust process, the high-pressure air first undergoes two collisions to remove oil before entering the oil-gas separator. Compared with the prior art, which simply relies on the oil-gas separator to remove oil from high-pressure air, it can greatly reduce the oil content in the exhaust. This allows the sliding vane air compressor to meet the application requirements of occasions with strict requirements for the oil content of high-pressure air, which is conducive to increasing the market share of the sliding vane air compressor. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the exhaust structure provided in an embodiment of the present utility model;

[0021] Figure 2 This is a schematic diagram of the internal structure of the oil storage tank used in an embodiment of the present utility model;

[0022] Figure 3 This is a three-dimensional structural diagram of the end cap used in an embodiment of the present utility model;

[0023] Figure 4 A schematic diagram of the internal structure of the exhaust structure provided in this embodiment of the utility model after partial cross-section of the oil-gas separator;

[0024] Figure 5 This is a schematic diagram of the end cap cut along its fourth exhaust channel in an embodiment of the present invention.

[0025] In the diagram: 10, oil reservoir; 101, first oil impact chamber; 1011, first exhaust path; 102, first exhaust port; 103, first oil impact plate; 20, stator and rotor vane assembly; 21, first exhaust channel; 30, end cover; 301, second oil impact chamber; 3011, second oil impact plate; 3012, second exhaust path; 302, second exhaust channel; 303, third exhaust channel; 304, fourth exhaust channel; 3041, exhaust valve; 305, second exhaust port; 306, third exhaust port; 40, oil-gas separator; 41, central exhaust pipe; 42, oil blocking chamber; 50, pressure gauge. Detailed Implementation

[0026] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0027] It should be noted that when a component is referred to as "set on" or "connected to" another component, it can be directly on the other component or indirectly on the other component.

[0028] It should be understood that the terms "upper", "lower", "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 application 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 application.

[0029] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" or "several" means two or more, unless otherwise explicitly specified.

[0030] Please refer to the following: Figures 1 to 5 The exhaust structure provided by this utility model will now be described. The exhaust structure includes an oil reservoir 10, an end cap 30, and an oil-gas separator 40. The oil reservoir 10 is provided with a stator-rotor vane assembly 20 for compressed air. The portion of the oil reservoir 10 above the internal liquid level and the outer periphery of the stator-rotor vane assembly 20 form a first oil impact chamber 101. The end cap 30 is fixedly connected to the end wall of the oil reservoir 10. The end cap 30 is provided with a second oil impact chamber 301, which communicates with the first oil impact chamber 101. The oil-gas separator 40 is connected to the end cap 30 and communicates with the second oil impact chamber 301. The high-pressure air discharged from the stator-rotor vane assembly 20 passes sequentially through the first oil impact chamber 101, the second oil impact chamber 301, and the oil-gas separator 40.

[0031] It should be explained that the stator and rotor vane assembly 20 used in this embodiment can be a structure of the prior art. Specifically, the rotor rotates eccentrically inside the stator, and a ring of vanes is provided on the outer periphery of the rotor to contact the inner wall of the stator. When the rotor rotates, the space between adjacent vanes changes continuously to achieve air compression.

[0032] The oil-gas separator 40 used in this embodiment can be a commonly used oil-gas separation element in the art, which mainly relies on the filter element to block oil mist. As prior art, it will not be described in detail here.

[0033] In this embodiment, the first oil-impact chamber 101 and the second oil-impact chamber 301 can be understood as being able to continuously collide with the chamber wall during the passage of high-pressure air, thereby enabling the oil mist carried in the high-pressure air to adhere to the chamber wall and achieve oil-gas separation. Specifically, the first oil-impact chamber 101 and the second oil-impact chamber 301 can adopt a curved extension or labyrinth-type chamber structure to increase the number of collisions between the chamber wall and the high-pressure air, thereby improving the oil-gas separation effect.

[0034] It should be understood that the first impact chamber 101 is located above the liquid surface of the oil reservoir 10, so the lubricating oil separated by impact can fall directly into the bottom of the oil reservoir 10; the second impact chamber 301 and the oil-gas separator 40 should both be provided with channels for returning oil to the oil reservoir 10 at their respective bottoms, so as to avoid excessive accumulation of lubricating oil in the second impact chamber 301 and the oil-gas separator 40, which would affect the oil-gas separation effect. The above-mentioned method of setting the channels for returning oil can adopt the existing method, such as the structure of the oil-gas separation element returning oil to the oil reservoir 10 in the prior art, which will not be described in detail here.

[0035] Compared with the prior art, the exhaust structure provided in this embodiment, in which the stator and rotor vane assembly 20 discharges high-pressure air into the first oil-impact chamber 101, causing collisions that detach most of the oil mist from the high-pressure gas. This process completes the first oil-gas separation as the high-pressure air passes through the first oil-impact chamber 101. Then, as the high-pressure air passes through the second oil-impact chamber 301, it undergoes another collision and oil removal, completing the second oil-gas separation. Finally, it enters the oil-gas separator 40 for the third oil-gas separation. Throughout the exhaust process, the high-pressure air undergoes two collision-based oil removal processes before entering the oil-gas separator 40. Compared to the prior art's reliance solely on the oil-gas separator 40 for high-pressure air oil removal, this significantly reduces the oil content in the exhaust, enabling the vane air compressor to meet the application requirements of applications with strict oil content requirements for high-pressure air and thus increasing the market share of vane air compressors.

[0036] In some embodiments, see Figure 2 The outer periphery of the stator and rotor vane assembly 20 and the inner wall of the oil reservoir 10 have a plurality of first oil impact plates 103 that are distributed intermittently. The first oil impact chamber 101 forms a curved first exhaust path 1011 based on each of the first oil impact plates 103.

[0037] The first oil-impacting plate 103 on the outer periphery of the stator and rotor vane assembly 20 and the first oil-impacting plate 103 on the inner wall of the oil storage tank 10 are arranged crosswise to ensure that the high-pressure air can impact each first oil-impacting plate 103 as it passes through the first oil-impacting chamber 101 along the first exhaust path 1011. This increases the number of impacts to remove oil and causes the oil mist carried in the high-pressure air to adhere to the first oil-impacting plate 103, thereby reducing the oil content of the high-pressure air after passing through the first oil-impacting chamber 101.

[0038] Specifically, such as Figure 2 As shown, the stator and rotor vane assembly 20 has a first exhaust channel 21 that extends obliquely upward to above the liquid surface and connects to the first oil impact chamber 101. The cavity wall of the first oil impact chamber 101 is provided with a first exhaust hole 102 for connecting to the second oil impact chamber 301. The first exhaust hole 102 and the first exhaust channel 21 are respectively located at both ends of the first exhaust path 1011.

[0039] The high-pressure air generated by the stator and rotor vane assembly 20 enters the first oil-impact chamber 101 through the first exhaust channel 21. Here, the first exhaust channel 21 is set to be inclined upward to connect to the first oil-impact chamber 101, and the outlet of the first exhaust channel 21 is located above the surface of the lubricating oil. This can prevent the high-pressure air from blowing the lubricating oil at the bottom of the oil reservoir 10, which would cause the oil content to increase. Furthermore, the first exhaust hole 102 and the first exhaust channel 21 are respectively placed at both ends of the first exhaust path 1011, thereby ensuring that the high-pressure air can hit each of the first oil-impact plates 103 in sequence along the curved first exhaust path 1011 to remove oil before being discharged through the first exhaust hole 102, thereby improving the effect of the first oil-gas separation and reducing the final oil content of the high-pressure air.

[0040] For a specific structural form of the aforementioned second oil-impact chamber 301, please refer to Figure 4 The upper and lower walls of the second oil-impact chamber 301 have several second oil-impact plates 3011 that are distributed at intervals and crosses with each other. The second oil-impact chamber 301 forms a curved second exhaust path 3012 based on each second oil-impact plate 3011.

[0041] The second oil-impact chamber 301 and the first oil-impact chamber 101 have the same oil removal method. Here, the second oil-impact plate 3011 on the upper cavity wall of the second oil-impact chamber 301 extends downward to the space between adjacent second oil-impact plates 3011 on the lower cavity wall. At the same time, the second oil-impact plates 3011 on the lower cavity wall also extend upward to the space between adjacent second oil-impact plates 3011 on the upper cavity wall, thus forming a pattern in which the second oil-impact plates 3011 are distributed in a staggered manner. After the high-pressure air enters the second oil-impact chamber 301, it can impact each second oil-impact plate 3011 in sequence along the second exhaust path 3012, thereby ensuring the number of high-pressure air impacts and improving the impact oil removal effect of the second oil-impact chamber 301.

[0042] It should be noted that, as Figure 4 As shown, in this embodiment, the end cap 30 is provided with a second exhaust channel 302 and a third exhaust channel 303 that are respectively connected to the second oil impact chamber 301 at both ends of the second exhaust path 3012; the second exhaust channel 302 is connected to the first exhaust hole 102, and the third exhaust channel 303 is connected to the oil-gas separator 40.

[0043] After the high-pressure air undergoes the first impact oil removal, it enters the second exhaust channel 302 through the first exhaust port 102, then enters the second impact oil chamber 301, and after passing through the second impact oil chamber 301 along the curved second exhaust path 3012, it enters the oil-gas separator 40 through the third exhaust channel 303, ensuring that the space of the second exhaust chamber can be fully utilized to improve the impact oil removal effect.

[0044] Among the possible implementation methods, please combine... Figures 3 to 5It is understood that the oil-gas separator 40 is inverted and mounted on the top wall of the end cover 30. The oil-gas separator 40 has a central exhaust pipe 41 and an oil-blocking cavity 42 arranged around the outer periphery of the central exhaust pipe 41. The oil-blocking cavity 42 is connected to the third exhaust channel 303, and the central exhaust pipe 41 is used to discharge clean high-pressure air.

[0045] The oil-gas separator 40 is installed in an inverted manner, which facilitates the condensation of oil mist that has separated from the high-pressure air into oil droplets, which then slide downwards and flow back into the oil storage tank 10. Here, the oil blocking chamber 42 can be understood as a cavity equipped with an oil filter element (a common structure of oil-gas separation elements in the prior art). After being de-oiled by impacts on both sides, the high-pressure air enters the oil blocking chamber 42. The oil filter element in the oil blocking chamber 42 blocks the fine oil mist particles within the oil blocking chamber 42, thereby reducing the oil content of the high-pressure air entering the central exhaust pipe 41 to meet the requirements.

[0046] In some embodiments, such as Figure 5 As shown, the end cap 30 is provided with a fourth exhaust passage 304, which is connected to the central exhaust pipe 41, and an exhaust valve 3041 is provided in the fourth exhaust passage 304. Since it is not convenient to directly connect the oil-gas separator 40 to the high-pressure gas pipeline, the fourth exhaust passage 304 connected to the central exhaust pipe 41 is provided in the end cap 30. The fourth exhaust passage 304 is connected to the high-pressure gas pipeline to deliver high-pressure air to the gas-consuming end, and the exhaust valve 3041 in the fourth exhaust passage 304 controls the pressure of the finally discharged high-pressure air. This simplifies the connection structure between the oil-gas separator 40 and the end cap 30, making it convenient to disassemble and replace the oil-gas separator 40.

[0047] In order to know the output high-pressure air pressure value at any time, such as Figure 5 As shown, the side wall of the end cap 30 is provided with a pressure gauge 50 that communicates with the fourth exhaust passage 304.

[0048] For a simplified installation layout of the vane air compressor and the layout of the high-pressure air piping between units, please refer to [link / reference needed]. Figure 5 The end cap 30 has a second exhaust port 305 and a third exhaust port 306 on its two adjacent side walls, respectively. Both the second exhaust port 305 and the third exhaust port 306 are connected to the fourth exhaust channel 304. A plug can be detachably connected to both the second exhaust port 305 and the third exhaust port 306. The high-pressure air pipeline of the air-using unit can be connected to the second exhaust port 305 with the plug removed, or it can be connected to the third exhaust port 306 with the plug removed. Alternatively, both the second exhaust port 305 and the third exhaust port 306 can be unplugged and connected to one air-using unit respectively, thereby meeting the requirement of two air-using units simultaneously obtaining high-pressure air.

[0049] Based on the same inventive concept, combined with Figures 1 to 5It is understood that this application also provides a vane air compressor, including the above-described exhaust structure.

[0050] The vane air compressor provided in this embodiment, compared with the prior art, adopts the above-mentioned exhaust structure. In the entire exhaust process, the high-pressure air undergoes two collisions to remove oil before entering the oil-gas separator 40. Compared with the prior art, which relies solely on the oil-gas separator 40 for high-pressure air oil removal, this method can greatly reduce the oil content in the exhaust. This allows the vane air compressor to meet the application requirements of situations where the oil content of high-pressure air is strictly controlled, which is conducive to increasing the market share of the vane air compressor.

[0051] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An exhaust structure characterized by, include: An oil reservoir is provided inside with a stator and rotor vane assembly for compressed air. The portion of the oil reservoir above the liquid level inside it forms a first oil impact chamber with the outer periphery of the stator and rotor vane assembly. An end cap is fixedly connected to the end wall of the oil storage shell. The end cap has a second oil impact chamber inside, which communicates with the first oil impact chamber. An oil-gas separator is connected to the end cap and communicates with the second oil-impact chamber; The high-pressure air discharged from the stator and rotor vane assembly passes sequentially through the first oil impact chamber, the second oil impact chamber, and the oil-gas separator.

2. The exhaust structure according to claim 1, characterized by The outer periphery of the stator and rotor vane assembly and the inner wall of the oil reservoir have a plurality of first oil-impacting plates that are distributed at intervals and crosses with each other. The first oil-impacting chamber forms a curved first exhaust path based on each of the first oil-impacting plates.

3. The exhaust structure according to claim 2, characterized by The stator and rotor vane assembly has a first exhaust channel that extends obliquely upward to above the liquid surface and connects to the first oil impact chamber. The cavity wall of the first oil impact chamber is provided with a first exhaust hole for connecting to the second oil impact chamber. The first exhaust hole and the first exhaust channel are respectively located at both ends of the first exhaust path.

4. The exhaust structure according to claim 3, characterized by The upper and lower walls of the second oil-impact chamber have a plurality of second oil-impact plates that are distributed at intervals and crosses with each other, and the second oil-impact chamber forms a curved second exhaust path based on each of the second oil-impact plates.

5. The exhaust structure according to claim 4, characterized by The end cap is provided with a second exhaust passage and a third exhaust passage that are respectively connected to the second oil impact chamber at both ends of the second exhaust path; the second exhaust passage is connected to the first exhaust hole, and the third exhaust passage is connected to the oil-gas separator.

6. The exhaust structure according to claim 5, characterized by The oil-gas separator is inverted and mounted on the top wall of the end cap. The oil-gas separator has a central exhaust pipe and an oil-blocking cavity surrounding the central exhaust pipe. The oil-blocking cavity is connected to the third exhaust channel, and the central exhaust pipe is used to discharge clean high-pressure air.

7. The exhaust structure according to claim 6, characterized by The end cap is provided with a fourth exhaust channel, which is connected to the central exhaust pipe, and an exhaust valve is provided in the fourth exhaust channel.

8. The exhaust structure according to claim 7, characterized by The side wall of the end cap is provided with a pressure gauge that communicates with the fourth exhaust passage.

9. The exhaust structure according to claim 7, wherein The end cap has a second vent hole and a third vent hole on two adjacent side walls, respectively. The second vent hole and the third vent hole are connected to the fourth vent channel. A plug can be detachably connected to both the second vent hole and the third vent hole.

10. A sliding vane air compressor characterized by, Includes the exhaust structure as described in any one of claims 1-9.

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