Negative pressure device for forming gearbox of oil-free screw air compressor

Abstract

The utility model relates to the technical field of oil-free screw air compressors, in particular to a negative pressure device for forming a gearbox of an oil-free screw air compressor, which comprises a gearbox and a negative pressure mechanism, the negative pressure mechanism comprises an air inlet pipe, a fan, an oil mist separator, an oil mist collecting pipe and an oil return pipe, the fan is arranged on one side of the gearbox, and the oil mist collecting pipe is arranged on the other side of the gearbox. One end of the air inlet pipe is fixedly connected with the fan, the other end of the air inlet pipe is fixedly connected with the oil mist separator, one end of the oil mist collecting pipe is fixedly connected with the oil mist separator, the other end of the oil mist collecting pipe is fixedly connected with the gearbox, one end of the oil return pipe is fixedly connected with the oil mist separator, and the other end of the oil return pipe is fixedly connected with the gearbox. Through the arrangement of the structure, the problems that the pressure of a gear box of an existing oil-free screw air compressor is unstable, and the phenomenon that oil leaks into a compression cavity from a labyrinth oil seal frequently occurs are solved.

Description

Technical Field

[0001] This utility model relates to the field of oil-free screw air compressor technology, and in particular to a negative pressure device for forming the gearbox of an oil-free screw air compressor. Background Technology

[0002] Oil-free screw air compressors are high-efficiency and reliable compressed air devices. Their core is a two-stage compressor unit, and the precision-machined rotor profile ensures efficient operation. This type of air compressor employs an oil-free design, avoiding oil contamination, and is suitable for industries with high compressed air quality requirements, such as electronics, chemicals, and pharmaceuticals. The main advantages of oil-free screw air compressors include high efficiency and maintenance-free operation. Their pre-assembled configuration simplifies installation, and the built-in cooling system enhances operational reliability. Furthermore, the oil-free design ensures the purity of the compressed air, making it suitable for applications involving precision equipment. In terms of application areas, oil-free screw air compressors are widely used in the electronics, chemical, and pharmaceutical industries, providing high-quality compressed air to meet the stringent air quality requirements of these industries. During operation, the gearbox operates under negative pressure, effectively preventing gearbox lubricating oil from entering the compression chamber and contaminating the compressed air.

[0003] However, the pressure in the gearbox of existing oilless screw air compressors is unstable, and oil leakage into the compression chamber often occurs at the labyrinth seal. Utility Model Content

[0004] The purpose of this invention is to provide a negative pressure device for forming the gearbox of an oilless screw air compressor, which solves the problem of unstable pressure in the gearbox of existing oilless screw air compressors and the frequent occurrence of oil leakage into the compression chamber at the labyrinth oil seal.

[0005] To achieve the above objectives, this utility model provides a negative pressure device for forming a gearbox of an oil-free screw air compressor, comprising a gearbox and a negative pressure mechanism. The negative pressure mechanism includes an air inlet pipe, a fan, an oil mist separator, an oil mist collection pipe, and an oil return pipe. The fan is disposed on one side of the gearbox. One end of the air inlet pipe is fixedly connected to the fan, and the other end of the air inlet pipe is fixedly connected to the oil mist separator. One end of the oil mist collection pipe is fixedly connected to the oil mist separator, and the other end of the oil mist collection pipe is fixedly connected to the gearbox. One end of the oil return pipe is fixedly connected to the oil mist separator, and the other end of the oil return pipe is fixedly connected to the gearbox.

[0006] The negative pressure mechanism further includes an air filter, which is fixedly connected to the air inlet pipe and located in the middle section of the air inlet pipe.

[0007] The negative pressure device forming the gearbox of the oil-free screw air compressor further includes a primary main unit and a secondary main unit. The primary main unit is fixedly connected to the gearbox and located on one side of the gearbox, and the secondary main unit is fixedly connected to the gearbox and located on one side of the primary main unit.

[0008] The negative pressure device forming the gearbox of the oil-free screw air compressor further includes a primary exhaust and a secondary exhaust. The primary exhaust is fixedly connected to the primary main unit and located on one side of the primary main unit, and the secondary exhaust is fixedly connected to the secondary main unit and located on one side of the secondary main unit.

[0009] This utility model discloses a negative pressure device for forming an oil-free screw air compressor gearbox. A fan is positioned on one side of the gearbox. One end of an air inlet pipe is fixedly connected to the fan, and the other end is fixedly connected to an oil mist separator. One end of an oil mist collection pipe is fixedly connected to the oil mist separator, and the other end is fixedly connected to the gearbox. One end of a return oil pipe is fixedly connected to the oil mist separator, and the other end is fixedly connected to the gearbox. The oil separated by the oil mist separator flows back into the gearbox under gravity through the return oil pipe. The air separated by the oil mist separator is drawn out by the fan and discharged into the atmosphere. The negative pressure is stabilized by setting the pressure of the gearbox. Attached Figure Description

[0010] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0011] Figure 1 This is a schematic diagram of the negative pressure device that forms the gearbox of an oil-free screw air compressor according to this utility model.

[0012] 1-Gearbox, 2-First-stage main unit, 3-Second-stage main unit, 4-Oil mist collection pipe, 5-Oil mist separator, 6-Oil return pipe, 7-Air filter, 8-Fan, 9-Intake pipe, 10-First-stage exhaust, 11-Second-stage exhaust. Detailed Implementation

[0013] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0014] Please see Figure 1 This utility model provides a negative pressure device for forming a gearbox of an oil-free screw air compressor, including a gearbox 1 and a negative pressure mechanism. The negative pressure mechanism includes an air inlet pipe, a fan 8, an oil mist separator 5, an oil mist collection pipe 4, and an oil return pipe 6. The fan 8 is disposed on one side of the gearbox 1. One end of the air inlet pipe is fixedly connected to the fan 8, and the other end of the air inlet pipe is fixedly connected to the oil mist separator 5. One end of the oil mist collection pipe 4 is fixedly connected to the oil mist separator 5, and the other end of the oil mist collection pipe 4 is fixedly connected to the gearbox 1. One end of the oil return pipe 6 is fixedly connected to the oil mist separator 5, and the other end of the oil return pipe 6 is fixedly connected to the gearbox 1.

[0015] In this embodiment, the oil separated by the oil mist separator 5 flows back to the interior of the gearbox 1 through the return oil pipe 6 under the action of gravity, and the air separated by the oil mist separator 5 is drawn out to the atmosphere by the fan 8. The negative pressure is stabilized by setting the pressure of the gearbox 1, which can effectively prevent the lubricating oil of the gearbox from entering the compression chamber and contaminating the compressed air.

[0016] Furthermore, the negative pressure mechanism also includes an air filter 7, which is fixedly connected to the air inlet pipe and located in the middle section of the air inlet pipe.

[0017] In this embodiment, the air filter 7 adjusts the air intake of the fan 8.

[0018] Furthermore, the negative pressure device forming the gearbox of the oilless screw air compressor also includes a primary host 2 and a secondary host 3. The primary host 2 is fixedly connected to the gearbox 1 and located on one side of the gearbox 1, and the secondary host 3 is fixedly connected to the gearbox 1 and located on one side of the primary host 2.

[0019] In this embodiment, the gearbox 1 drives both the primary host 2 and the secondary host 3 simultaneously.

[0020] Furthermore, the negative pressure device forming the gearbox of the oilless screw air compressor also includes a primary exhaust 10 and a secondary exhaust 11. The primary exhaust 10 is fixedly connected to the primary host 2 and located on one side of the primary host 2, and the secondary exhaust 11 is fixedly connected to the secondary host 3 and located on one side of the secondary host 3.

[0021] In this embodiment, the gearbox 1 drives the primary host 2 and the secondary component, and discharges compressed air through the primary exhaust 10 and the secondary exhaust 11 respectively.

[0022] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Those skilled in the art can understand that implementing all or part of the above-described embodiments and making equivalent changes in accordance with the claims of the present utility model are still within the scope of the utility model.

Claims

1. A negative pressure device for forming a gearbox of an oil-free screw air compressor, comprising a gearbox, characterized in that, It also includes a negative pressure mechanism, which comprises an air inlet pipe, a fan, an oil mist separator, an oil mist collection pipe, and an oil return pipe. The fan is located on one side of the gearbox. One end of the air inlet pipe is fixedly connected to the fan, and the other end of the air inlet pipe is fixedly connected to the oil mist separator. One end of the oil mist collection pipe is fixedly connected to the oil mist separator, and the other end of the oil mist collection pipe is fixedly connected to the gearbox. One end of the oil return pipe is fixedly connected to the oil mist separator, and the other end of the oil return pipe is fixedly connected to the gearbox.

2. The negative pressure device for forming the gearbox of an oil-free screw air compressor as described in claim 1, characterized in that, The negative pressure mechanism also includes an air filter, which is fixedly connected to the air inlet pipe and located in the middle section of the air inlet pipe.

3. The negative pressure device for forming the gearbox of an oil-free screw air compressor as described in claim 2, characterized in that, The negative pressure device forming the gearbox of the oil-free screw air compressor further includes a primary main unit and a secondary main unit. The primary main unit is fixedly connected to the gearbox and located on one side of the gearbox, and the secondary main unit is fixedly connected to the gearbox and located on one side of the primary main unit.

4. The negative pressure device for forming the gearbox of an oil-free screw air compressor as described in claim 3, characterized in that, The negative pressure device forming the gearbox of the oil-free screw air compressor further includes a primary exhaust and a secondary exhaust. The primary exhaust is fixedly connected to the primary main unit and located on one side of the primary main unit, and the secondary exhaust is fixedly connected to the secondary main unit and located on one side of the secondary main unit.

Images