A core structure of a four-stage filter composite oil-gas separator for an oil-injection screw.

Abstract

This utility model relates to the technical field of oil-injected screw air compressors, specifically to a four-stage filtration composite oil-gas separator core structure for oil-injected screw compressors. It includes an end cover flange, a main filter mechanism, and a secondary filter mechanism. The main filter mechanism comprises a coarse filter layer, a first condensing filter layer, a first outer metal mesh, a first intermediate metal mesh, and a first inner metal mesh. The secondary filter mechanism comprises a fine filter layer, a second condensing filter layer, a second outer metal mesh, a second intermediate metal mesh, and a second inner metal mesh. The main filter consists of a coarse filter layer and a first condensing filter layer, while the secondary filter consists of a fine filter layer and a second condensing filter layer. The filtration principle is coarse first, then fine, and they are used in a composite combination. The device is integrally connected and fixed by the outer, middle, and inner metal meshes, facilitating the passage of filtered oil. The secondary and main filters share the same end cover flange. Therefore, this device can perform four-stage layered filtration with high efficiency and long service life.

Description

Technical Field

[0001] This utility model relates to the field of oil-injected screw air compressor technology, and in particular to a core structure of a four-stage filter composite oil-gas separator for oil-injected screw compressors. Background Technology

[0002] The oil-gas separator cores commonly used in oil-injected screw air compressors on the market are usually single-core structures, consisting of a medium-precision filter layer, a condensation separation layer, and related components. They are mostly used in oil-injected screw air compressors with a volumetric flow rate of 80 cubic meters per minute and an exhaust pressure of 0.7–1.25 MPa or lower.

[0003] When an oil-injected screw air compressor is operating, the oil-air mixture discharged from the screw compressor undergoes cyclone, collision, and sedimentation separation in the oil-air separator. Large lubricating oil particles in the mixture are separated from the compressed air through these steps, with approximately 95% of the lubricating oil being separated. The remaining approximately 5% of the lubricating oil is filtered by the filter layer of a single oil-air separator core and then condensed by the condensation separation layer, completing the separation of lubricating oil from the compressed air. The condensed lubricating oil accumulates in the bottom oil reservoir due to gravity. This lubricating oil is then guided back to the screw compressor's air inlet via the oil return pipe under the pressure difference across the compressor system. The final compressed air supplied to the customer has an oil content of approximately 3 ppm. This design uses a medium-precision filter paper, has a large and rapidly rising pressure differential in the separator core, and typically has a service life of 4000 hours.

[0004] The lubricating oil collected in the bottom oil reservoir is dynamically returned through the oil separator return pipe under the action of the pressure difference before and after the compressor system. In order to ensure that the lubricating oil is quickly and cleanly discharged, there will be a state of mixed transportation of lubricating oil and compressed air, which seriously wastes compressed air. In addition, this oil-gas separator core has the following problems: the rated processing volume flow rate is too small, the oil-gas separator core filtration pressure difference is large and rises relatively quickly, and the oil content in the compressed air supplied to customers is too high. Currently, it is a single-stage filter, with low filtration efficiency and short service life. Utility Model Content

[0005] The purpose of this utility model is to provide a four-stage filter composite oil-gas separator core structure for oil-injected screw compressors. This solves the problem in the existing technology where lubricating oil accumulated in the bottom oil reservoir is dynamically returned through the oil return pipe under the action of the pressure difference before and after the compressor system. In order to ensure that the lubricating oil is quickly and cleanly discharged, there will be a state of mixed transportation of lubricating oil and compressed air, which seriously wastes compressed air. In addition, this oil-gas separator core has the problems of small rated processing volume flow rate, large oil-gas separator core filtration pressure difference and rapid rise, high oil content in the compressed air supplied to customers, and currently it is a single-stage filter with low filtration efficiency and short service life.

[0006] To achieve the above objectives, this utility model provides a four-stage filtration composite oil-gas separator core structure for an injecting screw, including an end cover flange, a main filter mechanism, and a secondary filter mechanism. The main filter mechanism includes a coarse filter layer, a first condensation filter layer, a first outer metal mesh, a first intermediate metal mesh, and a first inner metal mesh. The secondary filter mechanism includes a fine filter layer, a second condensation filter layer, a second outer metal mesh, a second intermediate metal mesh, and a second inner metal mesh. The coarse filter layer is disposed inside the first outer metal mesh, the first intermediate metal mesh is disposed inside the coarse filter layer, the first condensation filter layer is disposed inside the first intermediate metal mesh, the first inner metal mesh is disposed inside the first condensation filter layer, the second outer metal mesh is disposed inside the first inner metal mesh, the fine filter layer is disposed inside the second outer metal mesh, the second intermediate metal mesh is disposed inside the fine filter layer, the second condensation filter layer is disposed inside the second intermediate metal mesh, and the second inner metal mesh is disposed inside the second condensation filter layer.

[0007] The female filter mechanism further includes a first conductive sheet and a female oil storage bowl, and the female filter mechanism further includes a second conductive sheet and a female oil storage bowl. The first conductive sheet is disposed on the inner wall of the first inner metal mesh, the female oil storage bowl is disposed at the lower end of the first inner metal mesh, the second conductive sheet is disposed on the inner wall of the second inner metal mesh, and the female oil storage bowl is disposed at the lower end of the second inner metal mesh.

[0008] The core structure of the four-stage filter composite oil-gas separator for the oil injection screw also includes a female sleeve oil drain pipe and a female sleeve oil drain pipe. The female sleeve oil drain pipe is connected to the female sleeve oil storage bowl and is located at the lower end of the female sleeve oil storage bowl. One end of the female sleeve oil drain pipe is connected to the female sleeve oil storage bowl, and the other end of the female sleeve oil drain pipe passes through the female sleeve oil storage bowl.

[0009] The core structure of the four-stage filter composite oil-gas separator for the oil injection screw also includes two tie rods. One end of each tie rod is set on the first inner metal mesh, and the other end of each tie rod is connected to the oil storage bowl of the female sleeve.

[0010] The sub-filter mechanism is located inside the main filter mechanism, and the end cover flange is located at the upper end of both the main filter mechanism and the sub-filter mechanism.

[0011] This utility model discloses a four-stage composite oil-gas separator core structure for an oil-injection screw. The main filter consists of a coarse filter layer and a first coagulation filter layer, while the sub-filter consists of a fine filter layer and a second coagulation filter layer. The filtration principle is coarse first, then fine, and they are used in a composite combination. The device is connected and fixed as a whole by outer, middle, and inner metal meshes, which facilitates the passage of filtered oil. The sub-filter and the main filter share the same end cap flange. Thus, the device can perform four-stage layered filtration with high efficiency and long service life. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0014] 1-End cap flange, 2-Coarse filter layer, 3-First coagulation filter layer, 4-First outer metal mesh, 5-First intermediate metal mesh, 6-First inner metal mesh, 7-Fine filter layer, 8-Second coagulation filter layer, 9-Second outer metal mesh, 10-Second intermediate metal mesh, 11-Second inner metal mesh, 12-First conductive sheet, 13-Main sleeve oil reservoir, 14-Second conductive sheet, 15-Daughter sleeve oil reservoir, 16-Main sleeve oil drain pipe, 17-Daughter sleeve oil drain pipe, 18-Pull rod. Detailed Implementation

[0015] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0016] Please see Figure 1 ,in, Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0017] This utility model provides a four-stage filtration composite oil-gas separator core structure for an injecting screw, including an end cap flange 1, a main filter mechanism, and a secondary filter mechanism. The main filter mechanism includes a coarse filter layer 2, a first condensing filter layer 3, a first outer metal mesh 4, a first intermediate metal mesh 5, and a first inner metal mesh 6. The secondary filter mechanism includes a fine filter layer 7, a second condensing filter layer 8, a second outer metal mesh 9, a second intermediate metal mesh 10, and a second inner metal mesh 11. The coarse filter layer 2 is disposed inside the first outer metal mesh 4, the first intermediate metal mesh 5 is disposed inside the coarse filter layer 2, the first condensing filter layer 3 is disposed inside the first intermediate metal mesh 5, the first inner metal mesh 6 is disposed inside the first condensing filter layer 3, the second outer metal mesh 9 is disposed inside the first inner metal mesh 6, the fine filter layer 7 is disposed inside the second outer metal mesh 9, the second intermediate metal mesh 10 is disposed inside the fine filter layer 7, the second condensing filter layer 8 is disposed inside the second intermediate metal mesh 10, and the second inner metal mesh 11 is disposed inside the second condensing filter layer 8.

[0018] In this embodiment, the main filter consists of the coarse filter layer 2 and the first coagulation filter layer 3, and the sub-filter consists of the fine filter layer 7 and the second coagulation filter layer 8. The filtration principle is to use coarse first and then fine, and the filters are combined in a composite manner. The device is connected and fixed as a whole by outer, middle and inner metal meshes, which facilitates the passage of filtered oil. The sub-filter and the main filter share the end cap flange 1. Thus, the device can perform four-stage layered filtration with high efficiency and long service life.

[0019] Furthermore, the main filter mechanism further includes a first conductive sheet 12 and a main oil reservoir 13, and the secondary filter mechanism further includes a second conductive sheet 14 and a secondary oil reservoir 15. The first conductive sheet 12 is disposed on the inner wall of the first inner metal mesh 6, the main oil reservoir 13 is disposed at the lower end of the first inner metal mesh 6, the second conductive sheet 14 is disposed on the inner wall of the second inner metal mesh 11, and the secondary oil reservoir 15 is disposed at the lower end of the second inner metal mesh 11. The core structure of the four-stage filter composite oil-gas separator for the injection screw further includes a main oil drain pipe 16 and a secondary oil drain pipe 17. The main oil drain pipe 16 is connected to the main oil reservoir 13 and is located at the lower end of the main oil reservoir 13. One end of the secondary oil drain pipe 17 is connected to the secondary oil reservoir 15, and the other end of the secondary oil drain pipe 17 passes through the main oil reservoir 13. The core structure of the four-stage filter composite oil-gas separator for the oil injection screw also includes two tie rods 18. One end of each tie rod 18 is respectively disposed on the first inner metal mesh 6, and the other end of each tie rod 18 is respectively connected to the female sleeve oil storage bowl 13. The female sleeve filter mechanism is disposed inside the female sleeve filter mechanism, and the end cover flange 1 is disposed at the upper end of both the female sleeve filter mechanism and the female sleeve filter mechanism.

[0020] In this embodiment, the oil drain pipe is connected to the threaded hole on the female sleeve oil reservoir 13. Through the installation of the female sleeve oil drain pipe 17 and the female sleeve oil drain pipe 16, the oil in the female sleeve oil reservoir 13 and the female sleeve oil reservoir 15 can be drained and flow to the external zero-air-consumption oil drainer by gravity, so as to achieve the purpose of draining oil without consuming air.

[0021] The above-disclosed embodiments are merely one or more preferred embodiments of this application and should not be construed as limiting the scope of this application. Those skilled in the art can understand that all or part of the processes for implementing the above embodiments and equivalent changes made in accordance with the claims of this application still fall within the scope of this application.

Claims

1. A core structure for a four-stage filter composite oil-gas separator for an oil-injection screw, characterized in that, Includes end cap flange, main filter unit, and auxiliary filter unit; The master filter mechanism includes a coarse filter layer, a first coagulation filter layer, a first outer metal mesh, a first intermediate metal mesh, and a first inner metal mesh. The slave filter mechanism includes a fine filter layer, a second coagulation filter layer, a second outer metal mesh, a second intermediate metal mesh, and a second inner metal mesh. The coarse filter layer is disposed inside the first outer metal mesh, the first intermediate metal mesh is disposed inside the coarse filter layer, the first coagulation filter layer is disposed inside the first intermediate metal mesh, the first inner metal mesh is disposed inside the first coagulation filter layer, the second outer metal mesh is disposed inside the first inner metal mesh, the fine filter layer is disposed inside the second outer metal mesh, the second intermediate metal mesh is disposed inside the fine filter layer, the second coagulation filter layer is disposed inside the second intermediate metal mesh, and the second inner metal mesh is disposed inside the second coagulation filter layer.

2. The core structure of the four-stage filter composite oil-gas separator for the injection screw as described in claim 1, characterized in that, The main filter mechanism further includes a first conductive sheet and a main oil reservoir, and the secondary filter mechanism further includes a second conductive sheet and a secondary oil reservoir. The first conductive sheet is disposed on the inner wall of the first inner metal mesh, the main oil reservoir is disposed at the lower end of the first inner metal mesh, the second conductive sheet is disposed on the inner wall of the second inner metal mesh, and the secondary oil reservoir is disposed at the lower end of the second inner metal mesh.

3. The core structure of the four-stage filter composite oil-gas separator for the injection screw as described in claim 2, characterized in that, The core structure of the four-stage filter composite oil-gas separator for the oil injection screw also includes a female sleeve oil drain pipe and a female sleeve oil drain pipe. The female sleeve oil drain pipe is connected to the female sleeve oil storage bowl and is located at the lower end of the female sleeve oil storage bowl. One end of the female sleeve oil drain pipe is connected to the female sleeve oil storage bowl, and the other end of the female sleeve oil drain pipe passes through the female sleeve oil storage bowl.

4. The core structure of the four-stage filter composite oil-gas separator for the injection screw as described in claim 3, characterized in that, The core structure of the four-stage filter composite oil-gas separator for the oil injection screw also includes two tie rods. One end of each tie rod is set on the first inner metal mesh, and the other end of each tie rod is connected to the oil storage bowl of the female sleeve.

5. The core structure of the four-stage filter composite oil-gas separator for the injection screw as described in claim 4, characterized in that, The sub-filter mechanism is located inside the main filter mechanism, and the end cover flange is located at the upper end of both the main filter mechanism and the sub-filter mechanism.

Images