Reusable oil seal filter element shell structure

Abstract

The utility model discloses a reusable oil seal filter core shell structure, which comprises a screw main machine, an oil separation barrel, an oil separation core mechanism and a minimum pressure valve, the screw main machine is embedded in the tail end of the oil separation barrel, the top of the oil separation barrel is provided with the oil separation core mechanism, and the oil separation core mechanism comprises an oil separation core shell, an oil separation core body and a sealing assembly. An annular base is arranged on the top face of the oil separation barrel, the oil separation core body is installed in the annular base, the oil separation core shell is connected to the annular base in a clamped mode, a sealing assembly is arranged between the oil separation core shell and the annular base, and the oil separation core body is sealed in the oil separation core shell. The minimum pressure valve is arranged on the side face of the annular base, an exhaust pipeline is arranged between the screw main machine and the oil separation barrel, compressed air enters the oil separation core mechanism through the exhaust pipeline, and after the oil separation core mechanism filters oil liquid, the clean compressed air is discharged outwards through the minimum pressure valve. The utility model has the advantages that the oil separation core shell is convenient to replace, the failure rate of the filter core is small, and the service life is long.

Description

Technical Field

[0001] The utility model belongs to the technical field of air compressors, and in particular relates to a reusable oil seal filter element shell structure. Background Art

[0002] Screw air compressors are one of the power sources in the modern industrial field. The air compressor oil separator is an important air compressor accessory. During the compression process of the oil-injected screw air compressor, lubricating oil is involved in the whole process. Therefore, the gas discharged from the compressor contains a large amount of oil vapor. The function of the oil separator is to separate the oil from the compressed air so that the air compressor can supply clean compressed air to the outside.

[0003] The oil separator core is a consumable part of the screw air compressor. During use, as time goes by, the filtering performance of the oil separator core will gradually decrease, so it is necessary to replace the oil separator core regularly. In addition, the oil separator core is also prone to blockage, breakage and burning. Burning is manifested in the carbonization of part or all of the filter screen of the oil separator core, and even the metal shell of the oil separator core is burned. The main reason is that when installing the oil separator core, there is no reliable connection between the oil separator core shell and the oil separator barrel, and there is no grounding. When there is static electricity, the oil mist is ignited, causing the oil separator core to burn out. At present, the oil separator core part of the existing screw air compressor is difficult to simultaneously meet the performance requirements of reliable sealing connection, easy replacement and prevention of static electricity accumulation. Utility Model Content

[0004] In response to the above problems and technical requirements, the utility model provides a reusable oil seal filter element housing structure, which can effectively seal the oil separator core housing and the air compressor housing. The oil separator core housing is easy to replace, the filter element failure rate is low, and the service life is long.

[0005] The technical scheme of the utility model is as follows: a reusable oil seal filter shell structure, including a screw main unit, an oil separator barrel, an oil separator core mechanism and a minimum pressure valve, the screw main unit is embedded and installed in the tail end of the oil separator barrel, the oil separator core mechanism is provided on the top of the oil separator barrel, the oil separator core mechanism includes an oil separator core shell, an oil separator core body and a sealing component, an annular base is provided on the top surface of the oil separator barrel, the oil separator core body is installed in the annular base, the oil separator core shell is clamped on the annular base, a sealing component is provided between the oil separator core shell and the annular base, and the oil separator core shell seals the oil separator core body inside; the minimum pressure valve is arranged on the side of the annular base, the minimum pressure valve is connected to the core of the oil separator core body, an exhaust pipe is provided between the screw main unit and the oil separator barrel, the screw main unit discharges compressed air with oil, the compressed air enters the oil separator core mechanism through the exhaust pipe, the oil separator core mechanism filters the oil, and the clean compressed air is discharged outward through the minimum pressure valve. In the above scheme, the oil separator core shell and the annular base are snap-connected. When the oil separator core body needs to be replaced, the oil separator core shell can be removed by using commonly used standardized disassembly tools, which is more versatile and can be reused.

[0006] Furthermore, the oil separator core body includes a conductive upper cover, a conductive lower cover and a filter cartridge, the conductive upper cover is closed and covers the upper end face of the filter cartridge, the conductive lower cover is correspondingly covered on the lower end face of the filter cartridge, the core of the conductive lower cover is provided with an air outlet, the air outlet corresponds to the core of the filter cartridge, the clean air filtered by the filter cartridge is discharged outward through the air outlet, and the conductive upper cover and the conductive lower cover are both made of conductive metal. The static electricity accumulated on the filter cartridge can be released through the conductive upper cover and the conductive lower cover, preventing static electricity accumulation and avoiding oil separator core ablation.

[0007] Furthermore, the sealing assembly includes an end face sealing ring and an arc face sealing ring, a raised cover ring is arranged on the oil separator core shell, the oil separator core shell and the annular base are interference fit, the cover ring and the end face of the annular base are pressed tightly, the end face sealing ring is arranged on the contact surface between the cover ring and the annular base, and an arc face sealing ring is arranged between the outer side surface of the oil separator core shell and the inner wall of the annular base. Two sets of sealing rings are arranged between the oil separator core shell and the annular base, which can withstand the impact of high-pressure gas and maintain a stable sealing effect.

[0008] Furthermore, an exhaust cavity leading to the minimum pressure valve is provided at the bottom of the annular base, a piston and a spring are provided in the minimum pressure valve, the spring is fixedly connected in the valve, the front end of the spring is connected to the piston, the piston seals the exhaust cavity port under the action of the spring, and the compressed air rushing out of the exhaust cavity pushes the piston backward, so that the compressed air can be discharged outward through the minimum pressure valve. The minimum pressure valve seals the piston at the exhaust cavity port, and air cannot enter the annular base through the minimum pressure valve. The minimum pressure valve has a one-way exhaust characteristic, which ensures the sealing effect in the oil separation core mechanism.

[0009] Furthermore, the inner top surface of the oil separator core shell is pressed tightly against the conductive upper cover of the oil separator core body.

[0010] Furthermore, the exhaust pipe includes a main engine exhaust pipe, an oil separator barrel vertical cavity pipe and an oil separator barrel top cavity pipe. The front end of the screw main engine is connected with a horizontal main engine exhaust pipe. The oil separator barrel vertical cavity pipe and the oil separator barrel top cavity pipe are respectively arranged on the front end surface and the top of the oil separator barrel. The main engine exhaust pipe is connected to the bottom end of the oil separator barrel vertical cavity pipe. One end of the oil separator barrel top cavity pipe is connected to the top end of the oil separator barrel vertical cavity pipe, and the other end passes into the space between the outside of the filter element barrel and the outer shell of the oil separator element.

[0011] Furthermore, an oil return valve is also provided on the side of the annular base, and the oil return valve guides the oil filtered by the oil separation core body outward.

[0012] Compared with the prior art, the beneficial effects of the utility model are: 1) The utility model adopts the form of two sets of sealing rings and a piston-type minimum pressure valve to seal the oil separator core mechanism. The redundantly arranged multiple sealing structures have a good sealing effect, which can ensure that the oil separator core mechanism does not overflow gas when subjected to compressed air, and the filtering effect is stable; 2) A conductive upper cover and a conductive lower cover are arranged on the oil separator core body. The conductive upper cover contacts and presses the oil separator core shell, which can better fix the filter cartridge, and the conductive lower cover contacts the annular base. The upper and lower covers can release the static current on the filter cartridge in time to prevent sparks from ablation, and have a good protective effect on the oil separator core mechanism and the oil separator barrel; 3) When the filtering effect of the oil separator core body decreases, it is only necessary to remove the oil separator core shell and replace the filter cartridge part of the oil separator core to put it back into use. The oil separator core shell is a cylindrical clip-on structure, which is simple to replace and not easy to damage, so it can be used multiple times, saving costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is the overall structural diagram of the reusable oil seal filter housing structure of the utility model;

[0014] Figure 2 It is an exploded view structure of the reusable oil seal filter housing structure of the utility model;

[0015] Figure 3 It is a top view of the reusable oil seal filter housing structure of the utility model;

[0016] Figure 4 for Figure 3 The cross-sectional structure diagram at AA in the middle;

[0017] Figure 5 for Figure 4 A partial enlarged view of the

[0018] Figure 6 for Figure 3 The cross-sectional structure diagram at the middle BB;

[0019] Figure 7 This is a structural diagram of the oil-separating core body of the utility model;

[0020] Marked in the figure are: screw main unit 1, main unit exhaust pipe 11, oil separator barrel 2, annular base 21, exhaust cavity 22, oil separator barrel vertical cavity pipe 23, oil separator barrel top cavity pipe 24, oil return valve 25, oil separator core mechanism 3, oil separator core shell 4, cover ring 41, oil separator core body 5, conductive upper cover 51, filter element barrel 52, conductive lower cover 53, air outlet 531, sealing assembly 6, end face sealing ring 61, arc surface sealing ring 62, minimum pressure valve 7, piston 71, spring 72. DETAILED DESCRIPTION

[0021] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0022] like Figure 1-7 The utility model shows a reusable oil seal filter housing structure, including a screw main unit 1, an oil separator barrel 2, an oil separator core mechanism 3 and a minimum pressure valve 7. The screw main unit 1 is embedded and installed in the tail end of the oil separator barrel 2. The oil separator core mechanism 3 is provided on the top of the oil separator barrel 2. The oil separator core mechanism 3 includes an oil separator core housing 4, an oil separator core body 5 and a sealing assembly 6. An annular base 21 is provided on the top surface of the oil separator barrel 2. The oil separator core body 5 is installed in the annular base 21. The oil separator core housing 4 is clamped on the annular base 21. A sealing assembly 6 is provided between the oil separator core housing 4 and the annular base 21. The oil separator core housing 4 seals the oil separator core body 5 inside.

[0023] The sealing assembly 6 includes an end face sealing ring 61 and an arc face sealing ring 62. A raised cover ring 41 is provided on the oil separator core housing 4. The oil separator core housing 4 and the annular base 21 are interference fit. The cover ring 41 and the end face of the annular base 21 are pressed tightly. The end face sealing ring 61 is arranged on the contact surface between the cover ring 41 and the annular base 21. An arc face sealing ring 62 is arranged between the outer side of the oil separator core housing 4 and the inner wall of the annular base 21. The oil separator core body 5 includes a conductive upper cover 51, a conductive lower cover 53 and a filter cartridge 52. The conductive upper cover 51 is sealed and covered on the upper end face of the filter cartridge 52. The conductive lower cover 53 is correspondingly covered on the lower end face of the filter cartridge 52. The core of the conductive lower cover 53 is provided with an air outlet 531. The air outlet 531 corresponds to the core of the filter cartridge 52. The clean air filtered by the filter cartridge 52 is discharged outward through the air outlet 531. The conductive upper cover 51 and the conductive lower cover 53 are both made of conductive metal. The inner top surface of the oil separator core housing 4 is pressed against the conductive upper cover 51 of the oil separator core body 5. The conductive upper cover 51 contacts and presses the oil separator core housing 4, which can better fix the filter cartridge 52, and the conductive lower cover 53 contacts the annular base 21. The upper and lower covers can timely release the static current on the filter cartridge 52 to prevent sparks from ablation, and have a good protective effect on the oil separator core mechanism and the oil separator barrel.

[0024] The minimum pressure valve 7 is arranged on the side of the annular base 21, and the minimum pressure valve 7 is connected to the core of the oil separator core body 5. An exhaust pipe is arranged between the screw main unit 1 and the oil separator barrel 2. The screw main unit 1 discharges compressed air with oil, and the compressed air enters the oil separator core mechanism 3 through the exhaust pipe. After the oil separator core mechanism 3 filters the oil, the clean compressed air is discharged to the outside through the minimum pressure valve 7.

[0025] The bottom of the annular base 21 is provided with an exhaust cavity 22 leading to the minimum pressure valve 7. The minimum pressure valve 7 is provided with a piston 71 and a spring 72. The spring 72 is fixedly connected in the valve. The front end of the spring 72 is connected to the piston 71. The piston 71 seals the exhaust cavity 22 port under the action of the spring 72. The compressed air rushing out of the exhaust cavity 22 pushes the piston 71 backward, so that the compressed air can be discharged outward through the minimum pressure valve 7. The side of the annular base 21 is also provided with an oil return valve 25, which guides the oil filtered by the oil separation core body 5 outward.

[0026] The exhaust pipe includes a main engine exhaust pipe 11, an oil separator barrel vertical cavity pipe 23 and an oil separator barrel top cavity pipe 24. The front end of the screw main engine 1 is connected with a horizontal main engine exhaust pipe 11. The oil separator barrel vertical cavity pipe 23 and the oil separator barrel top cavity pipe 24 are respectively arranged on the front end surface and the top of the oil separator barrel. The main engine exhaust pipe 11 is connected to the bottom end of the oil separator barrel vertical cavity pipe 23. One end of the oil separator barrel top cavity pipe 24 is connected to the top end of the oil separator barrel vertical cavity pipe 23, and the other end passes into the space between the outside of the filter element barrel 52 and the oil separator core shell 4.

[0027] The working principle of the utility model is as follows: the screw main unit 1 compresses the air and discharges it outward through the main unit exhaust pipe 11, and the compressed air mixed with oil mist enters the space between the oil separator core shell 4 and the oil separator core body 5 through the main unit exhaust pipe 11, the oil separator barrel vertical cavity pipe 23 and the oil separator barrel top cavity pipe 24 in turn, and the filter cartridge 52 filters the oil mist in the compressed air, and the clean compressed air enters the core of the filter cartridge 52 and enters the exhaust cavity 22 through the air outlet hole 531. As the pressure in the exhaust cavity 22 increases, the air pressure pushes the piston 71 of the minimum pressure valve 7 outward, so that the end of the exhaust cavity 22 is opened, and the compressed air is discharged outward through the minimum pressure valve 7; when more oil mist is collected in the oil separator core body 5, the oil mist accumulates in the annular base 21 to form oil liquid, and the oil liquid flows to the oil return valve 25 through the pipeline and is discharged outward through the oil return valve 25. The recovered oil liquid can be used as the lubricating fluid of the screw main unit 1 again.

[0028] The above are only several preferred embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any changes and substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. Reusable oil seal filter housing structure, characterized by: It includes a screw main unit, an oil separator barrel, an oil separator core mechanism and a minimum pressure valve. The screw main unit is embedded and installed at the tail end of the oil separator barrel. The oil separator core mechanism is arranged on the top of the oil separator barrel. The oil separator core mechanism includes an oil separator core shell, an oil separator core body and a sealing component. An annular base is arranged on the top surface of the oil separator barrel. The oil separator core body is installed in the annular base. The oil separator core shell is clamped on the annular base. A sealing component is arranged between the oil separator core shell and the annular base. The oil separator core shell seals the oil separator core body inside; the minimum pressure valve is arranged on the side of the annular base. The minimum pressure valve is connected to the core of the oil separator core body. An exhaust pipe is arranged between the screw main unit and the oil separator barrel. The screw main unit discharges compressed air with oil. The compressed air enters the oil separator core mechanism through the exhaust pipe. After the oil separator core mechanism filters the oil, the clean compressed air is discharged outward through the minimum pressure valve.

2. The reusable oil seal filter housing structure according to claim 1, characterized in that: The oil separator core body includes a conductive upper cover, a conductive lower cover and a filter cartridge. The conductive upper cover is closed and covers the upper end surface of the filter cartridge, and the conductive lower cover is correspondingly covered on the lower end surface of the filter cartridge. The core of the conductive lower cover is provided with an air outlet, and the air outlet corresponds to the core of the filter cartridge. The clean air filtered by the filter cartridge is discharged outwardly through the air outlet. The conductive upper cover and the conductive lower cover are both made of conductive metal.

3. The reusable oil seal filter housing structure according to claim 2, characterized in that: The sealing assembly includes an end face sealing ring and an arc surface sealing ring. A circle of raised cover ring is provided on the oil separator core shell. The oil separator core shell and the annular base are interference fit. The cover ring and the end face of the annular base are pressed tightly. The end face sealing ring is arranged on the contact surface between the cover ring and the annular base. An arc surface sealing ring is provided between the outer side surface of the oil separator core shell and the inner wall of the annular base.

4. The reusable oil seal filter housing structure according to claim 3 is characterized in that: An exhaust cavity leading to the minimum pressure valve is provided at the bottom of the annular base. A piston and a spring are provided in the minimum pressure valve. The spring is fixedly connected in the valve. The front end of the spring is connected to the piston. The piston seals the exhaust cavity port under the action of the spring. The compressed air rushing out of the exhaust cavity pushes the piston backward, so that the compressed air can be discharged outward through the minimum pressure valve.

5. The reusable oil seal filter housing structure according to claim 4, characterized in that: The inner top surface of the oil separator core shell is pressed tightly against the conductive upper cover of the oil separator core body.

6. The reusable oil seal filter housing structure according to claim 5, characterized in that: The exhaust pipe includes a main engine exhaust pipe, an oil separator barrel vertical cavity pipe and an oil separator barrel top cavity pipe. The front end of the screw main engine is connected with a horizontal main engine exhaust pipe. The oil separator barrel vertical cavity pipe and the oil separator barrel top cavity pipe are respectively arranged on the front end surface and the top of the oil separator barrel. The main engine exhaust pipe is connected to the bottom end of the oil separator barrel vertical cavity pipe. One end of the oil separator barrel top cavity pipe is connected to the top end of the oil separator barrel vertical cavity pipe, and the other end passes into the space between the outside of the filter element barrel and the outer shell of the oil separator element.

7. The reusable oil seal filter housing structure according to claim 6, characterized in that: An oil return valve is also provided on the side of the annular base, and the oil return valve guides the oil filtered by the oil separation core body outward.

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