Oil filter structure of oil-free screw air compressor

Abstract

The utility model discloses an oil-free screw air compressor oil filter structure which comprises a gear rotor, a gear box cover and a gear box body, the gear box cover is installed and connected to the front end of the gear box body, the gear rotor is arranged in the gear box cover and the gear box body, and the gear rotor is connected to the gear box body. An oil pump is arranged at the outer end of the gear box cover, the oil filter body can effectively filter, remove and separate lubricating oil, air and impurities brought in by metal grinding, the filtered lubricating oil is conveyed into the oil pump, and the oil pump extrudes the lubricating oil when a pair of gears are meshed. High-pressure lubricating oil is formed and discharged into the oil filter cavity channel and the gearbox dispersion cavity channel through a pump and then dispersed to corresponding positions, so that a gear bearing part can be lubricated, friction damage and noise generated by friction are effectively reduced, the oil filter body is easy and convenient to replace, the machining cost is low, the oil filter body is used for filtering, replacement is easy and convenient, and the service life of the oil filter body is prolonged. And the processing cost is low.

Description

Technical Field

[0001] The utility model relates to the technical field of oil-free screw air compressors, in particular to an oil filter structure for an oil-free screw air compressor. Background Art

[0002] Oil-free screw air compressor is a special compressor. There is no lubricating oil in its compression chamber, only in the gear box. When working, the working principle of oil-free screw compressor is mainly to suck air into the machine through a pair of rotors that are not in direct contact and mesh with each other to rotate, then compress it, and finally discharge the high-pressure gas. The screw air compressor is mainly composed of two parts: the gear box and the rotor seat. The gear speed in the gear box can reach more than 10,000 rpm. The gear box lubrication method is splash lubrication. When the gear is running, the gear shaft throws the lubricating oil to the gear and bearing to form a lubricating film and provide lubrication. Under the splash lubrication method, the lubricating oil is usually located at the bottom of the gear box, and the centrifugal force is generated by the rotation of the gear to splash the lubricating oil onto the gear and bearing surface.

[0003] The lubricating oil in the gearbox of the existing oil-free screw air compressor directly enters the oil circuit, which will bring the impurities contained in the lubricating oil into the friction surface of the moving pair, accelerate the wear of the parts, thereby reducing the service life of the bearings and gears in the gearbox and clogging the oil circuit.

[0004] Therefore, a new oil filter structure for oil-free screw air compressor is proposed to solve the above technical problems. Utility Model Content

[0005] The purpose of the utility model is to provide an oil-free screw air compressor oil filter structure to solve the problem proposed in the above background technology that the lubricating oil in the gear box of the existing oil-free screw air compressor directly enters the oil circuit, thereby bringing the debris contained in the lubricating oil into the friction surface of the moving pair, accelerating the wear of the parts, thereby reducing the service life of the bearings and gears in the gear box and clogging the oil circuit.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an oil-free screw air compressor oil filter structure, comprising a gear rotor, a gear box cover and a gear box body, the gear box cover is installed and connected to the front end of the gear box body, the gear rotor is arranged inside the gear box cover and the gear box body, an oil pump is arranged at the outer end of the gear box cover, a gear box dispersion cavity is arranged on the inner side of the gear box cover, an oil filter cavity is arranged on the outer side of the gear box dispersion cavity at the gear box cover, and an oil filter body is arranged on the outer side of the lower end of the gear box cover.

[0007] Among them, the gearbox cover includes an oil filter installation groove, a cover shell and a cover cavity. The cover cavity is arranged inside the cover shell, and an oil filter installation groove is arranged on the outer side of the lower end of the cover shell. The cover shell is connected to the gearbox body.

[0008] Among them, the gear box dispersion cavity includes an upper oil circuit and a lower oil circuit, the upper oil circuit is connected to the front end bearing and gear of the gear box body, and the lower oil circuit is connected to the rear end synchronous gear and bearing of the gear box body.

[0009] Wherein, the oil discharge port of the oil pump is connected with the dispersion cavity of the gear box.

[0010] Wherein, the filter outlet of the oil filter body is connected with the oil inlet of the oil pump.

[0011] Wherein, the oil filter body is a gasoline filter.

[0012] In summary, due to the adoption of the above technology, the beneficial effects of the utility model are:

[0013] 1. In the utility model, the oil filter body can effectively filter, remove and separate the lubricating oil, air and impurities brought in by metal grinding. The filtered lubricating oil is delivered to the oil pump. The oil pump squeezes out the lubricating oil when a pair of gears are meshed, forming high-pressure lubricating oil which is discharged into the oil filter cavity and the gear box dispersion cavity through the pump, and then dispersed to the corresponding positions, so that the gear bearing parts can be lubricated, thereby effectively reducing friction damage and noise generated by friction. The replacement of the oil filter body is simple and convenient, and the processing cost is low.

[0014] 2. In the utility model, the oil filter body performs filtering, which makes replacement simple and convenient, and the processing cost is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the side plane structure of an oil filter structure for an oil-free screw air compressor of the utility model;

[0016] Figure 2 for Figure 1 Schematic diagram of the oil circuit in the AA area cross section of an oil filter structure for an oil-free screw air compressor of the utility model;

[0017] Figure 3 for Figure 2 A schematic diagram of the oil circuit in the DD area cross section of an oil filter structure for an oil-free screw air compressor according to the utility model;

[0018] Figure 4 This is a schematic diagram of the gear box cover structure of an oil filter structure for an oil-free screw air compressor of the utility model;

[0019] Figure 5The utility model is a schematic diagram of the gear box body structure of an oil filter structure for an oil-free screw air compressor.

[0020] In the figure: 1. Oil pump; 2. Oil filter body; 3. Oil filter cavity; 4. Gear rotor; 5. Gearbox cover; 51. Oil filter mounting groove; 52. Cover shell; 53. Cover inner cavity; 6. Gearbox body; 7. Gearbox dispersion cavity. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the utility model for which protection is claimed, but merely represents selected embodiments of the utility model.

[0022] Embodiment 1

[0023] Reference Figure 1-Figure 5 An oil filter structure for an oil-free screw air compressor comprises a gear rotor 4, a gear box cover 5 and a gear box body 6. The gear box cover 5 is installed and connected to the front end of the gear box body 6. The gear rotor 4 is arranged inside the gear box cover 5 and the gear box body 6. An oil pump 1 is arranged at the outer end of the gear box cover 5. A gear box dispersion cavity 7 is arranged on the inner side of the gear box cover 5. An oil filter cavity 3 is arranged on the outer side of the gear box dispersion cavity 7 at the gear box cover 5. An oil filter body 2 is arranged on the outer side of the lower end of the gear box cover 5.

[0024] In the utility model, the gearbox cover 5 includes an oil filter installation groove 51, a cover shell 52 and a cover inner cavity 53. The cover inner cavity 53 is arranged inside the cover shell 52, and the oil filter installation groove 51 is arranged on the outer side of the lower end of the cover shell 52. The cover shell 52 is connected to the gearbox body 6. The cover shell 52 of the gearbox cover 5 passes through the area of ​​the cover inner cavity 53, so that it can be installed and used accordingly. Due to the oil filter installation groove 51 on the inner side of the lower end of the cover shell 52, the oil filter body 2 can be installed and used accordingly.

[0025] In the utility model, the oil discharge port of the oil pump 1 is connected with the gear box dispersion cavity 7, so as to facilitate the through-conveying and conveying use.

[0026] In the utility model, the filter outlet of the oil filter body 2 is connected with the oil inlet of the oil pump 1, so that the oil can be filtered and transported for use.

[0027] In the utility model, the oil filter body 2 is a gasoline filter, which makes replacement simple and convenient, and has low processing cost.

[0028] Embodiment 2

[0029] Reference Figure 1-Figure 5 The gear box dispersion cavity 7 includes an upper oil circuit and a lower oil circuit. The upper oil circuit is connected to the front end bearing and gear of the gear box body 6, and the lower oil circuit is connected to the rear end synchronous gear and bearing of the gear box body 6, so that the lubricating oil can be transported to the designated parts for lubrication.

[0030] Working principle: When in use, the gear box composed of the gear rotor 4, the gear box cover 5 and the gear box body 6 is injected with lubrication through the oil suction port, and then flows into the oil filter body 2 for filtration. The oil filter body 2 can effectively filter, remove and separate the lubricating oil, air, and impurities brought in by metal grinding. The filtered lubricating oil is transported to the oil pump 1. The oil pump 1 squeezes out the lubricating oil when a pair of gears are engaged to form high-pressure lubricating oil, which is discharged into the oil filter cavity 3 and the gear box dispersion cavity 7 through the pump, and then dispersed to the corresponding position, so that the gear bearing parts can be lubricated, thereby effectively reducing friction damage and noise generated by friction. The replacement of the oil filter body 2 is simple and convenient, and the processing cost is low.

[0031] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

[0032] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

Claims

1. An oil-free screw air compressor oil filter structure, comprising a gear rotor (4), a gear box cover (5) and a gear box body (6), wherein the gear box cover (5) is mounted and connected to the front end of the gear box body (6), and the gear rotor (4) is arranged inside the gear box cover (5) and the gear box body (6), characterized in that: An oil pump (1) is arranged at the outer end of the gearbox cover (5), a gearbox dispersion cavity (7) is arranged on the inner side of the gearbox cover (5), an oil filter cavity (3) is arranged on the outer side of the gearbox dispersion cavity (7) at the gearbox cover (5), and an oil filter body (2) is arranged on the outer side of the lower end of the gearbox cover (5).

2. The oil filter structure for an oil-free screw air compressor according to claim 1, characterized in that: The gearbox cover (5) comprises an oil filter installation groove (51), a cover shell (52) and a cover inner cavity (53); the cover inner cavity (53) is arranged inside the cover shell (52); the oil filter installation groove (51) is arranged on the outer side of the lower end of the cover shell (52); and the cover shell (52) is connected to the gearbox body (6).

3. The oil filter structure for an oil-free screw air compressor according to claim 1, characterized in that: The gearbox dispersion cavity (7) comprises an upper oil circuit and a lower oil circuit, wherein the upper oil circuit is in communication with the front end bearing and the gear of the gearbox body (6), and the lower oil circuit is in communication with the rear end synchronous gear and the bearing of the gearbox body (6).

4. The oil filter structure for an oil-free screw air compressor according to claim 1, characterized in that: The oil discharge port of the oil pump (1) is in communication with the gear box dispersion cavity (7).

5. The oil filter structure for an oil-free screw air compressor according to claim 1, characterized in that: The filter outlet of the oil filter body (2) is connected to the oil inlet of the oil pump (1).

6. The oil filter structure for an oil-free screw air compressor according to claim 1, characterized in that: The oil filter body (2) is a gasoline filter.

Images