CN212396148U

CN212396148U - Multi-step gradient composite oil-gas separation filter

Info

Publication number: CN212396148U
Application number: CN202021847700.1U
Authority: CN
Inventors: 黄彪统
Original assignee: Zhuhai Sanfam Filter Co ltd
Current assignee: Zhuhai Sanfam Filter Co ltd
Priority date: 2020-08-28
Filing date: 2020-08-28
Publication date: 2021-01-26
Anticipated expiration: 2030-08-28

Abstract

The utility model discloses a multi-step gradient composite oil-gas separation filter, belonging to the technical field of filters, which comprises a filter layer, flanges arranged at the upper end and the lower end of the filter layer, and a lower end cover; the filter layer comprises at least two layers of structures, and the lengths of the filter layer structures are gradually reduced from the air inlet side to the air outlet side; the lower end cover is provided with a connecting part which protrudes towards the inner side of the lower end cover and is matched with the filter layer, the connecting part is of a ladder-shaped structure, and the number of steps of the connecting part is equal to the number of layers of the filter layer structure. The utility model discloses a compound oil-gas separation filter of multistage gradient can effectively reduce the product pressure differential, improve separation efficiency, has prolonged life greatly, can satisfy high-efficient energy-conserving user demand well.

Description

Multi-step gradient composite oil-gas separation filter

Technical Field

The utility model relates to a filter technical field, concretely relates to compound oil-gas separation filter of multistage gradient.

Background

The air compressor oil-gas separation filter consists of a plurality of parts, namely a metal end cover, a metal supporting framework, sealing glue and a filtering and separating filter material, and has the main function of filtering micro-oil drops and solid particles in an oil-gas mixture in an air compressor system to meet the requirement of clean air utilization. Wherein, the micro-oil drop comes from the head and is carried along with the air flow, and the sources of the solid particles mainly come down to the following four aspects: (1) the new oil is not clean; (2) metal particles generated by the running friction of the main machine; (3) contaminants generated by high temperature oxidation in the lubrication system; (4) haze and other environmental pollution.

The filter element is used as an element for filtering pollutants actually, and in the using process, microparticles deposited on the filter paper are accumulated continuously to block filter holes and reduce the filtering efficiency, so that the service life and the stability of the filter frequently appear, and even stop is caused when the filter is serious; along with the increase of interception pollutant, the pressure drop that the air current produced through the filter core increases, and when the filtration micropore area of filter paper blockked up gradually, will reduce the filtration efficiency of filter, the pressure drop increase will lead to the energy consumption increase, reduces the life of filter.

In addition, the sealing ring surface of the lower end cover of the traditional air compressor oil-gas separation filter is flat, the separated lubricating oil is pushed inwards along the air flow and is attached to the surface of the lower filter material to reduce the flow area, the pressure difference is large, more lubricating oil is collected in the groove of the lower end cover, and the oil return load of an oil return pipe is increased; on the other hand, the filter material only has a well net skeleton winding filter material, leads to filter core separation efficiency lower, life is shorter.

SUMMERY OF THE UTILITY MODEL

In order to overcome the not enough of prior art, the utility model aims to provide a compound oil-gas separation filter of multistage gradient, the utility model discloses can effectively reduce product pressure differential, improve separation efficiency, prolong life greatly, can satisfy high-efficient energy-conserving user demand well.

In order to solve the above problem, the utility model discloses the technical scheme who adopts as follows:

a multi-step gradient composite oil-gas separation filter comprises a filter layer, flanges arranged at the upper end and the lower end of the filter layer, and a lower end cover; the filter layer comprises at least two layers of structures, and the lengths of the filter layer structures are gradually reduced from the air inlet side to the air outlet side; the lower end cover is provided with a connecting part which protrudes towards the inner side of the lower end cover and is matched with the filter layer, the connecting part is of a ladder-shaped structure, and the number of steps of the connecting part is equal to the number of layers of the filter layer structure.

As a preferred embodiment of the present invention, the distance between the step of the connecting portion and the bottom of the lower end cover is gradually decreased from inside to outside, and the radius of the step is gradually increased from inside to outside.

As the utility model discloses preferred embodiment, the lower part end cover still has ring flange and oil trap, the ring flange is connected with the lower extreme of connecting portion, the oil trap is connected with the upper end of connecting portion and caves in to the outside of lower part end cover.

Further preferably, the cross section of the oil storage groove is in an inverted trapezoid shape.

As the utility model discloses preferred embodiment, the filtering layer includes by the preceding separating layer, coarse separation layer and the smart separating layer that the side set gradually of admitting air side to the side of exhaling, have the clearance between preceding separating layer and the coarse separation layer, between coarse separation layer and the smart separating layer.

As a preferred embodiment of the present invention, the number of the steps of the connecting portion is three, including a first step, a second step and a third step which are connected in sequence; the first step is bonded with the lower end part of the pre-separation layer, the second step is bonded with the lower end part of the coarse separation layer, and the third step is bonded with the lower end part of the fine separation layer.

As the utility model discloses preferred embodiment, between pre-separating layer and the second step, all be provided with between thick separating layer and the third step and keep off the rubber ring.

As a preferred embodiment of the present invention, the pre-separation layer comprises a pre-separation filter material and an outer support perforated plate net which are sequentially arranged from outside to inside; the pre-separation filter material is polyester fiber cotton.

As a preferred embodiment of the present invention, the coarse separation layer comprises a coarse separation folded filter material and a middle support pore plate mesh which are sequentially arranged from outside to inside; the rough separation folding filter material consists of a galvanized folding wire mesh, a non-woven fabric layer, a glass fiber filter material, a non-woven fabric layer and a galvanized folding wire mesh which are sequentially arranged from outside to inside.

As the utility model discloses preferred embodiment, fine separating layer includes the fine winding layer of glass, first internal stay perforated plate net, gathers the cotton layer of water conservancy diversion and second internal stay perforated plate net that outside-in set gradually.

Compared with the prior art, the beneficial effects of the utility model reside in that:

the utility model provides a compound oil-gas separation filter of multistage gradient sets up the connecting portion that lower part end cover and filtering layer are connected into the echelonment structure, make the sealed anchor ring of lower part end cover be the ladder anchor ring that has the height drop, make the micro oil that intercepts via the filtering layer of multilayer layer structure can utilize the dead weight to subside in the lower part end cover outside along the ladder anchor ring of lower part end cover and outwards arrange through the compound mode of multistage gradient, reduce the deposit of lubricating oil, reduce the resistance of whole filter core widely, effectively avoid micro oil to drop to adhere to the lower part surface of filtering layer and cause the flow area to reduce and pressure differential great; meanwhile, the connecting part protruding towards the inner side of the lower end cover can increase the contact area between the oil-gas mixture and the outer side of the lower end cover, so that the oil-gas mixture which rises can be subjected to mechanical collision coarse separation, the content of micro-oil drops carried in air flow is greatly reduced, the oil resistance of filter materials in a filter layer is reduced, and the separation efficiency is greatly improved. On the other hand, due to the ladder-shaped design of the connecting part, each step is bonded with an independent separation filter material, the filter materials are distributed from coarse to fine from outside to inside in precision, and are subjected to multi-stage gradient composite separation, so that the separation efficiency of the filter element is greatly improved, the dust holding capacity is large, the pressure difference is increased more slowly, and the service life of a product is greatly prolonged.

To sum up, the utility model discloses can effectively reduce product pressure differential and resistance, improve separation efficiency, prolong life greatly, can satisfy high-efficient energy-conserving user demand well, improve the market competition and the brand influence power of product greatly.

Drawings

Fig. 1 is a partial cross-sectional view of a multi-step gradient composite oil-gas separation filter according to the present invention;

FIG. 2 is an enlarged view of part A of FIG. 1 according to the present invention;

FIG. 3 is an enlarged view of a portion B of FIG. 1 according to the present invention;

fig. 4 is a schematic structural diagram of the lower end cap according to the present invention.

The reference numbers illustrate: 1. a lower end cap; 101. a connecting portion; 102. a circular ring flange; 103. an oil storage groove; 2. a first-level rubber blocking ring; 3. a second-stage rubber blocking ring; 4. pre-separating the filter material; 5. an outer support perforated plate net; 6. roughly separating the folded filter material; 7. a middle support orifice plate net; 8. a glass fiber winding layer; 9. a first inner support perforated deck web; 10. a coagulated flow-guiding cotton layer; 11. a second inner support perforated plate web; 12. and (4) a flange.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

As shown in figure 1, for the multi-step gradient composite oil-gas separation filter of the present invention, it includes a filter layer, a flange 12 and a lower end cover 1. The flange 12 is arranged at the upper end of the filtering layer and used for connection, sealing and installation, and the center of the flange 12 is provided with an opening which is an exhaust port and used for exhausting clean air flow after oil-gas separation. The filter layer mainly used as filter core main part intercepts tiny solid particles such as oil drops and dust in to the oil-gas mixture and filters, the utility model discloses a filter layer includes at least two-layer filter media layer structure, and the length of filter layer structure is steadilyd decrease gradually in proper order by the side of admitting air to the side of giving vent to anger, and the terminal surface that all layer structures are close to flange 12 one side is the parallel and level terminal surface, and every layer upon layer structure has the difference in height between being close to the terminal surface of lower part end cover 1. Correspondingly, the lower end cover 1 is arranged at the lower end of the filter layer, the lower end cover 1 is provided with a connecting part 101 which protrudes towards the inner side of the lower end cover and is matched with the filter layer, the connecting part 101 is in a step-shaped structure, and the number of steps of the connecting part 101 is equal to the number of layers of the filter layer structure. Preferably, the step height of the connecting portion 101 is equal to the height difference between every two adjacent layer structures, the distance from the step of the connecting portion 101 to the bottom of the lower end cover 1 gradually decreases from inside to outside, and the step radius gradually increases from inside to outside. According to the above technical scheme, the utility model discloses a set up connecting portion 101 of lower part end cover 1 to echelonment structure, make the sealed anchor ring face of lower part end cover 1 be the ladder anchor ring face that has the height drop, make the micro oil that gets off through the filtering layer interception of multilayer layer structure can utilize the dead weight to subside in lower part end cover 1 outside along the ladder anchor ring face of lower part end cover 1 and outwards arrange through the compound mode of multistage gradient, reduce the deposit of lubricating oil, reduce the resistance of whole filter core widely, effectively avoid micro oil to drop to adhere to the lower part surface of filtering layer and cause the flow area to reduce and pressure differential great; on the other hand, the connecting part 101 protruding towards the inner side of the lower end cover 1 can increase the contact area between the oil-gas mixture and the outer side of the lower end cover 1, so that the rising oil-gas mixture is subjected to mechanical collision coarse separation, the content of micro-oil drops carried in air flow is greatly reduced, the oil resistance of filter materials in a filter layer is reduced, and the separation efficiency is greatly improved.

Specifically, referring to fig. 4, the lower end cap 1 further has a circular ring rib 102 and an oil reservoir groove 103, and the circular ring rib 102, the connecting portion 101 and the oil reservoir groove 103 are integrally press-formed. Wherein, the annular flange 102 is connected with the lower end of the connecting part 101, and is used for being connected with the filtering layer and playing a role in sealing and fixing the filtering layer. The oil storage groove 103 is connected with the upper end of the connecting part 101 and is sunken towards the outer side of the lower end cover 1, so that an oil storage space is formed in the filtering layer by the oil storage groove 103, and tiny oil drops in filtered air flow can be gathered in the oil storage space and finally sucked away by an oil return pipe. Preferably, the cross section of the oil storage groove 103 is in an inverted trapezoid shape, and the inverted trapezoid structure can further increase the contact area between the oil-gas mixture and the outer side of the lower end cover 1, so that the mechanical collision rough separation effect between the oil-gas mixture and the oil-gas mixture is stronger, the content of micro oil drops carried in the air flow is reduced, the oil resistance of the filter material in the filter layer is reduced, and the oil-gas separation efficiency is further improved.

The number of steps of the lower end cover 1 depends on the number of layers of a layer structure of the filter layer, the specific number can be set according to actual requirements, and the number is preferably 2-4. Taking a three-step gradient composite oil-gas separation filter with a better effect as an example, as shown in fig. 1, a filter layer of the composite oil-gas separation filter specifically comprises a pre-separation layer, a coarse separation layer and a fine separation layer which are sequentially arranged from an air inlet side to an air outlet side, and gaps are arranged between the pre-separation layer and the coarse separation layer and between the coarse separation layer and the fine separation layer. Gaps are reserved among the layer structures, so that the contact area between the airflow and the filter material can be increased. Correspondingly, the number of the steps of the connecting part 101 is three, and the connecting part comprises a first step, a second step and a third step which are sequentially connected from top to bottom; the first step is bonded with the lower end part of the pre-separation layer, the second step is bonded with the lower end part of the coarse separation layer, and the third step is bonded with the lower end part of the fine separation layer. Further, rubber blocking rings are arranged between the pre-separation layer and the second step and between the coarse separation layer and the third step; wherein, the fender rubber ring that the cover was established between pre-separation layer and the second step keeps off rubber ring 2 for one-level, and the fender rubber ring that the cover was established between thick separation layer and the third step keeps off rubber ring 3 for the second grade, and glue flow direction outside when its effect all is preventing to bond.

Specifically, referring to fig. 2 and 3, the pre-separation layer comprises a pre-separation filter material 4 and an outer support pore plate mesh 5 which are arranged from outside to inside in sequence; the pre-separation filter material 4 is used for intercepting and separating large oil drops in an oil-gas mixture so as to reduce the load of each layer of filter material on the inner side; the outer supporting perforated plate net 5 is fixedly bonded between the flange 12 and the lower end cover 1 and is used for supporting the pre-separation filter material 4. The pre-separation filter material 4 adopts a low-precision porous filter material, has a large dust holding capacity, increases the pressure difference more slowly, and can greatly prolong the service life of products, such as polyester fibers, polyurethane fibers, polyamide fibers, polypropylene fibers, spandex fibers, polyester fibers and other fiber filter materials, and preferably selects 10 mm-thick polyester fiber cotton. The coarse separation layer comprises a coarse separation folded filter material 6 and a middle support pore plate net 7 which are arranged from outside to inside in sequence; the rough separation folding filter material 6 consists of a galvanized folding wire mesh layer, a non-woven fabric layer, six glass fiber filter materials, a non-woven fabric layer and a galvanized folding wire mesh layer which are sequentially arranged from outside to inside, and the filter material with the folding structure can roughly separate most of tiny oil drops and has the functions of dust holding and dirt holding; the middle supporting porous plate net 7 is fixedly bonded between the flange 12 and the lower end cover 1 and is used for supporting the coarse separation folded filter material 6. The fine separation layer comprises a glass fiber winding layer 8, a first inner supporting hole plate net 9, a condensation flow guide cotton layer 10 and a second inner supporting hole plate net 11 which are sequentially arranged from outside to inside; the glass fiber winding layer 8 is formed by winding six layers of high-precision glass fiber filter materials, and the glass fiber winding layer 8 mainly has the function of finely separating residual micro-oil drops with small particle sizes from the previous-stage filter material, so that the oil content of exhaust gas is less than or equal to 1ppm after the multistage filter material is separated; the first inner supporting hole plate net 9 is also bonded and fixed between the upper end cover and the lower end cover and is used for supporting the glass fiber winding layer 8; the condensed flow guide cotton layer 10 is used for catching a part of oil drops condensed and separated from the glass fiber winding layer 8 when the condensed flow guide cotton blows to the inner side along with the air flow, and the oil drops are settled and guided to the oil storage groove 103 of the lower end cover 1 by gravity, so that the oil drops are sucked by the oil return pipe for reuse; the second inner supporting perforated net 11 is also bonded and fixed between the upper and lower end caps for supporting the condensed flow guide cotton layer 10. Can know by the structure of above-mentioned filtering layer, the utility model discloses an all bond on every level of step of lower part end cover 1 and have independent separation filter media, the filter media precision is by outer to interior from thick to the smart distribution, multistage gradient composite separation: the residual micro oil drops after the first-stage separation enter the second-stage separation, so that solid particles such as micro dust and the like contained in the micro oil drops are intercepted, and the micro residual oil drops after the second-stage separation enter the fine separation layer to carry out third-stage fine separation, so that the separation efficiency of the filter element is greatly improved, the filter element has large dust holding capacity, the pressure difference is increased more slowly, and the service life of a product is greatly prolonged.

The working principle of the air compressor is as follows: after the air compressor compresses air through the main engine, the oil-gas mixture with tiny oil drops is discharged into the oil-gas separation filter arranged in the oil-gas barrel through a pipeline, and the oil-gas separation filter is used for separating lubricating oil in the oil-gas mixture as far as possible so as to meet the requirements of clean air and environmental protection, so that the oil-gas separation filter is required to have low filter element resistance, high separation efficiency and long service life. Will follow respectively below reducing the filter core resistance, improving separation efficiency and promoting the three aspect of life and come the concrete analysis the utility model discloses a how to obtain above beneficial effect.

Firstly, reduce the resistance of the filter element

As shown in fig. 1 and 4, the large arrows indicate the flow direction of the air flow, and the small arrows indicate the flow direction of the lubricating oil. The oil-gas mixture with large and small oil drops ascends from the lower part of the lower end cover 1, the airflow is firstly in collision contact with the lower end cover 1, and the mechanical collision separation at the position can separate most of the oil drops with larger particle size, so that the oil drop content in the airflow is reduced; then the air current bypasses the lower end cover 1 to continuously rise, and enters the filter element from the outside of the filter layer to the inside, the three filter layers are distributed at intervals, a certain gap is reserved between each two filter layers, the lubricating oil separated by the filter materials at all levels is settled at the step of the connecting part 101 of the lower end cover 1 under the action of gravity, and the lubricating oil is discharged outwards from the lower part under the action of self weight and finally drops from the outside of the lower end cover 1 because the height of the three steps is gradually reduced from the inside to the outside. The resistance of the filter element is related to the amount of lubricating oil adhering to the filter material, and the resistance of the filter element is lower as the amount of oil drops entering and adhering to the filter element is smaller. Therefore, the utility model discloses lubricating oil that the filter media at different levels separated down receives gravity to subside in the step department of 1 connecting portion 101 of lower part end cover and outwards discharge, effectively reduces the adsorption capacity of filter media at different levels to greatly reduced filter core resistance.

Secondly, improving the separation efficiency:

as shown in fig. 2 and 3, each step of the lower end cover 1 is connected with a filter layer to form a three-stage gradient composite separation structure, and the filtering precision is gradually improved from outside to inside. The pre-separation layer intercepts and separates large oil drops in the oil-gas mixture, removes a part of oil drops with large particle size, and effectively lightens the load of each stage of filter material behind; the coarse separation layer is used for performing coarse separation on most oil drops with small particle sizes; the fine separation layer is mainly used for finely separating micro oil drops with fine particle sizes remained in the previous stage of filter material separation, and the oil content of exhaust gas after the multistage filter material separation is ensured to be less than or equal to 1 ppm. The lubricating oil content of the oil-gas mixture before entering the filter element is certain, the oil content is gradually reduced after the air flow passes through the first-stage separation unit, and after three-stage separation of pre-separation, coarse separation and fine separation, the separation efficiency is greatly improved compared with that of the filter element in the traditional process, and the use requirement of extremely low oil content can be well met.

Third, the service life is prolonged

As shown in FIG. 3, the folding structure of the coarse separation layer not only can coarsely separate most of tiny oil drops, but also has the functions of dust holding and dirt holding, so that the scaling substances in fine dust and lubricating oil in the airflow are intercepted in the folding structure, the area of the unfolded coarse separation layer of the folding structure is larger, and the dust holding and dirt holding capacity is greatly enhanced. In addition, the coarse separation layer also can adopt the glass fiber material of lower precision as the filter media, and the average aperture macropore is many, holds dirt holding capacity reinforce, combines folding filter media, and filter core pressure differential increases can be slower, and filter core life will be more permanent.

To sum up, the utility model discloses a compound oil-gas separation filter of multistage gradient carries out mechanical collision through the echelonment structure of lower part end cover 1 to the big oil droplet in the updraft and carries out coarse separation, then oil droplet and impurity separation in with oil-gas mixture through the filtering layer of the compound separation of tertiary gradient, utilize the action of gravity to discharge outside through the lubricating oil that separates each level filter media from inside to outside step height drop at last, reduce the stock of lubricating oil, the content volume concentration that finally reaches oil-gas mixture lubricating oil is less than or equal to 1ppm, reduce the resistance of whole filter core widely. Therefore, the utility model discloses a compound oil-gas separation filter of multistage gradient has separation efficiency height, low, the long service life's of filtration resistance advantage, can satisfy high-efficient energy-conserving user demand well, has improved the market competition and the brand influence of product greatly, the utility model discloses a lower end cover and filter structure not only are applicable to the oil-gas separation, also can be applicable to in other gas-liquid separations, and application scope is wide, has very excellent marketing prospect.

The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention cannot be limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are all within the protection scope of the present invention.

Claims

1. The utility model provides a compound oil-gas separation filter of multistage gradient which characterized in that: comprises a filter layer, flanges arranged at the upper end and the lower end of the filter layer, and a lower end cover; the filter layer comprises at least two layers of structures, and the lengths of the filter layer structures are gradually reduced from the air inlet side to the air outlet side; the lower end cover is provided with a connecting part which protrudes towards the inner side of the lower end cover and is matched with the filter layer, the connecting part is of a ladder-shaped structure, and the number of steps of the connecting part is equal to the number of layers of the filter layer structure.

2. The multi-step gradient composite oil-gas separation filter as claimed in claim 1, wherein: the distance between the step of the connecting part and the bottom of the lower end cover is gradually reduced from inside to outside, and the radius of the step is gradually increased from inside to outside.

3. The multi-step gradient composite oil-gas separation filter as claimed in claim 2, wherein: the lower end cover is also provided with a circular ring flange and an oil storage groove, the circular ring flange is connected with the lower end of the connecting part, and the oil storage groove is connected with the upper end of the connecting part and is sunken towards the outer side of the lower end cover.

4. The multi-step gradient composite oil-gas separation filter as claimed in claim 3, wherein: the cross section of the oil storage groove is in an inverted trapezoid shape.

5. The multi-order gradient composite oil-gas separation filter as claimed in any one of claims 1 to 4, wherein: the filtering layer comprises a pre-separation layer, a coarse separation layer and a fine separation layer which are sequentially arranged from the air inlet side to the air outlet side, and gaps are arranged between the pre-separation layer and the coarse separation layer and between the coarse separation layer and the fine separation layer.

6. The multi-step gradient composite oil-gas separation filter as claimed in claim 5, wherein: the number of the steps of the connecting part is three, and the connecting part comprises a first step, a second step and a third step which are connected in sequence; the first step is bonded with the lower end part of the pre-separation layer, the second step is bonded with the lower end part of the coarse separation layer, and the third step is bonded with the lower end part of the fine separation layer.

7. The multi-step gradient composite oil-gas separation filter as claimed in claim 6, wherein: and rubber blocking rings are arranged between the pre-separation layer and the second step and between the coarse separation layer and the third step.

8. The multi-step gradient composite oil-gas separation filter as claimed in claim 5, wherein: the pre-separation layer comprises a pre-separation filter material and an outer support pore plate net which are sequentially arranged from outside to inside; the pre-separation filter material is polyester fiber cotton.

9. The multi-step gradient composite oil-gas separation filter as claimed in claim 5, wherein: the coarse separation layer comprises a coarse separation folded filter material and a middle support pore plate net which are sequentially arranged from outside to inside; the rough separation folding filter material consists of a galvanized folding wire mesh, a non-woven fabric layer, a glass fiber filter material, a non-woven fabric layer and a galvanized folding wire mesh which are sequentially arranged from outside to inside.

10. The multi-step gradient composite oil-gas separation filter as claimed in claim 5, wherein: the fine separation layer comprises a glass fiber winding layer, a first inner supporting hole plate net, a condensation flow guide cotton layer and a second inner supporting hole plate net which are sequentially arranged from outside to inside.