CN116293022A - Multistage coupling type breather valve - Google Patents
Multistage coupling type breather valve Download PDFInfo
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- CN116293022A CN116293022A CN202211094459.3A CN202211094459A CN116293022A CN 116293022 A CN116293022 A CN 116293022A CN 202211094459 A CN202211094459 A CN 202211094459A CN 116293022 A CN116293022 A CN 116293022A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/10—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
- B01D46/12—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces in multiple arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15D—FLUID DYNAMICS, i.e. METHODS OR MEANS FOR INFLUENCING THE FLOW OF GASES OR LIQUIDS
- F15D1/00—Influencing flow of fluids
- F15D1/02—Influencing flow of fluids in pipes or conduits
- F15D1/04—Arrangements of guide vanes in pipe elbows or duct bends; Construction of pipe conduit elements for elbows with respect to flow, e.g. for reducing losses of flow
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K24/00—Devices, e.g. valves, for venting or aerating enclosures
- F16K24/04—Devices, e.g. valves, for venting or aerating enclosures for venting only
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- Engineering & Computer Science (AREA)
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- Mechanical Engineering (AREA)
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- Fluid Mechanics (AREA)
- Separating Particles In Gases By Inertia (AREA)
Abstract
The invention discloses a multistage coupling type air-permeable valve, which comprises an air-permeable valve main body and a diffusion cyclone separation structure, wherein a filter layer structure is arranged in the air-permeable valve main body, the diffusion cyclone separation structure is provided with a diffuser and a cyclone separation piece which are connected, the cyclone separation piece is connected with the air-permeable valve main body, and a rotary guide vane structure is arranged in the cyclone separation piece. The breather valve can realize super-strong interception of oil mist aerosol in the running process of the electric automobile, improves the toughness and the air permeability of the membrane material to the maximum extent, further effectively improves the oil-proof air permeability characteristic and the service life of the breather valve, and improves the running safety of the electric automobile.
Description
Technical Field
The invention relates to the technical field of ventilation valves, in particular to a multistage coupling type ventilation valve.
Background
Along with the proposal of the targets of carbon neutralization and carbon peak, each industry is actively added into the energy-saving and emission-reducing teams through product optimization transformation, wherein the electric automobile gradually enters the field of view of the masses as an energy-saving product with near zero emission. The safety performance of electric vehicles is the most important concern, and this requires that the electric and mechanical products of electric vehicles have a high protection level. The gearbox, the oil cooling motor and the electric control equipment of the vehicle must ensure that pollutants such as liquid drops and dust cannot enter the gearbox, or else the electronic components or the rotating parts are damaged, so that the service life of the gearbox, the oil cooling motor and the electric control equipment is reduced. Some devices such as an electronic engine controller are often affected by external environmental temperature and pressure fluctuation in use, and when the protective box body is in absolute sealing, the problem of unbalanced internal and external pressure exists. When the equipment works, internal electronic components generate heat, so that air in the shell is heated and expanded, if the air cannot be discharged in time, the pressure in the box body can be continuously increased and gathered at the weakest part on the shell, and when the equipment stops working or the temperature is reduced, the internal pressure is reduced to form negative pressure due to respiratory effect, and the conditions can cause adverse effects on the performance of the equipment. To solve the above problems, a waterproof and breathable valve is often introduced into the device to prevent water and dirt and balance the internal and external pressures. In addition, lubricating oil is required to be added between a plurality of internal parts of an automobile to prevent abrasion, but lubricating oil drops are splashed due to collision and friction between parts and high-speed running of equipment in the running process of the equipment, or oil mist is changed into suspension in air in a box due to the rising of the running temperature of the equipment and the high-speed running of the equipment, and in order to prevent the oil drops from penetrating into external pollution equipment through an air permeable valve, the air permeable valve is required to have excellent oil-proof performance.
At present, the traditional air-permeable valve mainly achieves the purposes of water resistance, air permeability and oil resistance through the waterproof air-permeable membrane and the filtering membrane material inside the traditional air-permeable valve, however, the traditional air-permeable valve has the following problems: (1) The oil-proof performance is poor, and oil mist cannot be captured and intercepted in time to cause oil mist leakage, so that the safe operation of equipment is affected; (2) The oil discharge performance is poor, and a large amount of oil mist can be captured but liquid cannot be discharged in time, so that the oil-proof performance of the membrane material is poor due to over saturation or the service life of the membrane material is reduced due to ulceration; (3) In order to achieve a higher filtering effect, the traditional ventilation valve often uses a plurality of layers of single membrane materials, and has poor ventilation performance; (4) The membrane material has lower strength and poorer compression resistance and high temperature resistance; (5) The air holes are directly contacted with the outside, so that impurities such as dust in the atmosphere are easy to enter the polluted membrane materials, and even the operation of equipment is influenced; (6) The threaded fit mode is single, can't satisfy the installation of no screw design equipment.
Disclosure of Invention
The invention provides a multistage coupling type breather valve, which can realize super interception of oil mist aerosol in the running process of an electric automobile, furthest improve the toughness and the breather performance of a membrane material, further effectively improve the oil-proof breather characteristic and the service life of the breather valve, and improve the running safety of the electric automobile.
A multi-stage coupled breather valve, comprising:
the ventilation valve main body is internally provided with a filter layer structure;
the diffusion cyclone separation structure is provided with a diffusion piece and a cyclone separation piece which are connected, the cyclone separation piece is connected with the ventilation valve main body, and a rotary guide vane structure is arranged in the cyclone separation piece.
The multistage coupled ventilation valve comprises a rotary guide vane structure, wherein the rotary guide vane structure comprises a central shaft, and a first guide vane structure and a second guide vane structure which are connected to the central shaft, the first guide vane structure is provided with a plurality of first blades distributed along a first rotation direction, the second guide vane structure is provided with a plurality of second blades distributed along a second rotation direction, and the rotation direction of the first blades is opposite to that of the second blades.
The multistage coupled ventilation valve as described above, wherein the diffuser has a diffuser passage that tapers radially in a direction toward the cyclonic separating member.
The multistage coupling type ventilation valve, wherein the inner wall surface of the diffusion channel comprises a strong oil-repellent ring surface and a strong oil-philic ring surface, and the strong oil-philic ring surface and the strong oil-repellent ring surface are sequentially arranged along the direction facing the cyclone separating piece; the oil drop contact angle of the strong oil-repellent area is larger than or equal to 150 degrees, and the oil drop contact angle of the strong oil-philic area is 0-10 degrees.
The multistage coupling type ventilation valve comprises a filter layer structure, wherein the filter layer structure comprises a metal filter layer, a nonmetal filter layer and an oil-repellent water-repellent film layer which are sequentially stacked, and the metal filter layer is positioned at the bottom of the ventilation valve main body and is connected with the rotary guide vane structure.
The multistage coupling type ventilation valve comprises the metal filter layer, wherein the metal filter layer comprises a central circular area located at a central position, and a sawtooth inner ring area and a sawtooth outer ring area located at edge positions, and a sawtooth structure is arranged at the joint of the sawtooth inner ring area and the sawtooth outer ring area.
The multistage coupling type ventilation valve comprises a central circular area, a sawtooth outer ring area, a sawtooth inner ring area and a sawtooth outer ring area, wherein the central circular area and the sawtooth outer ring area are super-oil-repellent and water-repellent areas, and the sawtooth inner ring area is a super-oleophilic and hydrophilic area.
The multi-stage coupling type ventilation valve, wherein the nonmetallic filter layer is composed of a plurality of nonmetallic fiber filter layers which are arranged in a laminated mode; the nonmetallic fiber filter layer comprises a sawtooth inner area positioned at the central position and a sawtooth outer ring area positioned at the edge position, and a sawtooth structure is arranged at the joint of the sawtooth inner area and the sawtooth outer ring area.
The multistage coupling type ventilation valve is characterized in that the sawtooth inner area is a super-oil-repellent water-repellent area, the sawtooth outer ring area is a super-oleophilic hydrophilic area, and the contact angle of oil drops in the sawtooth outer ring area of each nonmetallic filter layer is sequentially increased along the direction away from the metallic filter layer.
The multi-stage coupled ventilation valve as described above, wherein the area of the zigzag outer ring region of the non-metal filtration layer is greater than the area of the zigzag outer ring region of the metal filtration layer.
The multistage coupled ventilation valve as described above, wherein the zigzag inner region of the non-metallic filter layer and/or the central circular region of the metallic filter layer is provided with at least one lyophilic strip.
The multistage coupling type ventilation valve is characterized in that a sawtooth structure is arranged at the edge of the lyophilic strip.
The multistage coupled ventilation valve as described above, wherein an outer zigzag structure is provided at an edge of the zigzag structure of the non-metal filter layer and/or at an edge of the zigzag structure of the metal filter layer.
The multistage coupling type ventilation valve is characterized in that a membrane placing table is arranged between the nonmetal filter layer and the oil-repellent water-repellent film layer, the membrane placing table comprises an open pore area positioned at the center position and an annular area positioned at the edge position, and the oil-repellent water-repellent film layer is arranged on the open pore area.
The multistage coupling type ventilation valve comprises a valve body and a valve cap, wherein the valve body and the valve cap are buckled together, a plurality of grooves are formed in the opening edge of the valve body along the circumferential direction of the valve body, a plurality of bosses are formed in the top of the valve cap along the circumferential direction of the valve cap, and the bosses are embedded into the grooves in the state that the valve cap is buckled on the valve body.
The multistage coupling type ventilation valve is characterized in that at least one ventilation hole is formed in the side wall of the valve body along the circumferential direction of the side wall of the valve body, the valve cap is provided with an outer annular wall extending towards the valve body, and at least one ventilation hole is blocked by the outer annular wall.
The multistage coupled ventilation valve as described above, wherein a retention tab is disposed within the ventilation valve body, the retention tab configured to secure the metallic filter layer and the non-metallic filter layer laminated within the ventilation valve body.
Compared with the prior art, the technical scheme provided by the invention has the following beneficial effects:
(1) The multistage coupling type ventilation valve provided by the invention has excellent trapping capability for oil drops. Primary cyclone separation and trapping of oil drops can be realized through the bottom diffuser and the rotary guide vane structure, secondary filtration and trapping of the oil drops can be realized through the metal filter layer, tertiary filtration and trapping of the oil drops can be realized through the nonmetal filter layer on the upper part, quaternary interception of the oil drops can be realized through the oil-repellent water-repellent film on the top, and the interception and trapping effect of the breather valve on oil mist is effectively enhanced through the multistage coupling design.
(2) The multistage coupling type breather valve has excellent liquid discharge capacity. The liquid drops can be automatically discharged under the action of gravity through the non-uniform modification treatment of the bottom expanding piece, the two-stage guide vanes can be respectively reversely discharged through the blade rotation direction opposite and the middle slotting design of the rotary guide vanes, the liquid discharge speed is effectively improved, the upper metal filter layer and the nonmetal filter layer form liquid discharge channels of the liquid drops from top to bottom under the sawtooth structure and the reasonable modification area, the liquid discharge capacity of the ventilation valve is further enhanced, and the phenomenon that the trapped liquid drops enter the upstream along with the air flow again due to untimely liquid discharge of the traditional ventilation valve is effectively reduced.
(3) The multistage coupling type breather valve has excellent compression resistance and high temperature resistance. The invention uses the metal filter layer as the pressure-bearing filter member, and has excellent high temperature resistance and pressure-bearing capacity, thereby further improving the overall pressure resistance and high temperature resistance of the ventilation valve.
(4) The multistage coupling type breather valve of the present invention has excellent air permeability. According to the invention, the rotary guide vanes and the multi-layer filter layer are coupled to replace the traditional multi-layer single filter layer design, so that the air permeability reduction caused by excessive filter layers is effectively avoided, the multi-stage coupling design realizes timely drainage of the filter layers, and the air permeability reduction problem caused by blocking of pores among fibers by oil drops is effectively reduced, so that the air permeability of the air permeable valve is obviously improved on the premise of not reducing the filtering effect.
(5) The multistage coupling type ventilation valve can realize long-period stable operation under multiple working conditions. The invention adopts the design of coupling the diffusion cyclone separation structure and the filter layer structure to realize the rapid liquid discharge of separating and capturing liquid drops, avoids the problem of material ulcer caused by untimely liquid discharge of the filter layer, can realize the normal operation of the ventilation valve under the working conditions of high pressure and high temperature by the design of the metal filter layer, and simultaneously provides a corresponding optimization scheme under the working conditions of different degrees of oil mist concentration, so that the invention can safely and stably operate for a long period under various severe working conditions.
(6) The multistage coupling type breather valve has excellent antifouling and dustproof performances. The invention adopts the design of the composite buckle type cap, which not only can ensure that the air smoothly passes through the air holes to maintain the balance of the internal pressure and the external pressure, but also can prevent the air holes from being directly exposed in the external environment, and can prevent dust and other particles in the air from polluting the membrane material through the air holes, and even can influence the normal operation of the equipment.
(7) The multistage coupling type breather valve has strong installation applicability. According to the invention, the cyclone cylinders with three different matching modes are adopted, the corresponding air-permeable valves have three mounting modes, and the air-permeable valves with different matching modes can be selected according to the requirements of mounting equipment, so that the invention has wide application scenes and strong universality.
Drawings
In order to more clearly illustrate the invention or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the invention and that other drawings can be obtained from them without inventive effort for a person skilled in the art. In the drawings:
FIG. 1 is a schematic view of the overall structure of a multi-stage coupled ventilation valve according to the present invention;
FIG. 2 is a schematic diagram of the overall cross-sectional structure of the multi-stage coupled ventilation valve according to the present invention;
FIG. 3 is a schematic cross-sectional view of a diffuser for a multi-stage coupled ventilation valve according to the present invention;
FIG. 4 is a schematic view of a rotary vane structure of a multi-stage coupled ventilation valve according to the present invention;
FIG. 5 is a schematic view of a single vane of a multi-stage coupled ventilation valve according to the present invention;
FIG. 6 is a schematic view of a projection function of a vane of a multi-stage coupled ventilation valve according to the present invention;
FIG. 7 is a schematic view of a partially modified metal fiber felt structure of a multi-stage coupled ventilation valve according to the present invention;
FIG. 8 is a schematic cross-sectional view of a nonmetallic fiber filtering layer of a multistage coupled ventilation valve according to the present invention;
FIG. 9 is a schematic illustration of a non-metallic fiber filter layer structure of a multi-stage coupled ventilation valve according to the present invention;
FIG. 10 is a schematic view of a cross-sectional composite sawtooth structure of a multi-stage coupled ventilation valve according to the present invention;
FIG. 11 is a schematic illustration of the structure of a lyophilic strip of a multi-stage coupled ventilation valve according to the present invention;
FIG. 12 is a schematic view of a zigzag structure on a lyophilic strip of a multi-stage coupled ventilation valve according to the present invention;
FIG. 13 is a schematic view of a membrane placement table of a multi-stage coupled ventilation valve according to the present invention;
FIG. 14 is a schematic view of the structure of a bonnet of a multi-stage coupled ventilation valve according to the present invention;
FIG. 15 is a schematic cross-sectional view of a valve body of a multi-stage coupled ventilation valve according to the present invention;
FIG. 16 is a schematic view of a screw-threaded swirl pot of a multi-stage coupled ventilation valve according to the present invention;
FIG. 17 is a schematic structural view of a dual seal ring mating swirl pot of a multi-stage coupled ventilation valve according to the present invention;
fig. 18 is a schematic structural view of a snap-fit cyclone cartridge of the multi-stage coupling type ventilation valve according to the present invention.
Reference numerals illustrate:
10. a breather valve body; 11. a valve body; 111. ventilation holes; 112. a groove; 113. a retention tab; 12. a valve cap; 121. a boss; 13. a filter layer structure; 131. a metal filter layer; 1311. a central circular region; 1312. a serrated inner ring region; 1313. a serration outer ring region; 1314. a saw tooth structure; 132. a non-metal filter layer; 132a, a first non-metallic fibrous filtration layer; 132b, a second non-metallic fibrous filtration layer; 132c, a third non-metallic fibrous filtration layer; 132d, fourth A non-metallic fibrous filtration layer; 1321. a serration inner region; 1322. a serration outer ring region; 1323. a saw tooth structure; 133. a film placing table; 1331. an annular region; 1332. an open area; 134. an oil-repellent water-repellent film layer; 135. an outer saw tooth structure; 14. a lyophile strip; 141. a saw tooth structure; 20. a diffusion cyclone separation structure; 21. a spreading member; 211. a strong oil-repellent annulus; 212. a strong oleophilic torus; 22. a cyclone separator; 221. a swirl pot; 23. a rotary vane structure; 231. a central shaft; 232. a first vane structure; 233. a second guide vane structure; 234. a first blade; 235. a second blade; A. a first rotational direction; B. a second rotational direction; d (D) 1 Diameter; d (D) 2 Diameter; H. blade height; K. a diffusion passage; l (L) 1 Length; l (L) 2 Length; l (L) 3 Length; l (L) 4 Length; n, inner wall surface; r is R 3 The outer diameter of the blade; a. height of the steel plate; b. wall thickness; c. spacing; d. diameter; d, d 1 Diameter of the necking end; d, d 2 The diameter of the flaring end; e. spacing; f. blade thickness; g. a width; h. height of the steel plate;
a saw tooth angle; />
A saw tooth angle; />
Saw tooth angle.
Detailed Description
In order to make the technical solution of the present invention better understood by those skilled in the art, the technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, shall fall within the scope of the invention.
It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
As shown in fig. 1 and 2, the present invention provides a multi-stage coupled type breather valve, which comprises a breather valve body 10 and a diffusion cyclone separation structure 20; wherein, a filter layer structure 13 is arranged in the breather valve main body 10; the diffusion cyclone separation structure 20 is provided with a diffusion piece 21 and a cyclone separation piece 22 which are connected, the cyclone separation piece 22 is connected with the breather valve body 10, and a rotary guide vane structure 23 is arranged in the cyclone separation piece 22.
According to the multistage coupling type breather valve, the diffuser 21 and the rotary guide vane structure 23 can realize primary cyclone separation and trapping of oil drops and have excellent liquid draining capacity, and the filter layer structure 13 in the breather valve main body 10 can carry out multistage filtration and trapping on the oil drops, so that the escape of the oil drops is reduced to the greatest extent. The multistage coupling type ventilation valve can be applied to an electric automobile, can realize super-strong interception of oil mist aerosol in the running process of the electric automobile, improves the toughness and the ventilation performance of the membrane material to the maximum extent, further effectively improves the oil-proof ventilation characteristic and the service life of the ventilation valve, and improves the running safety of the electric automobile.
Specifically, the bottom of the breather valve body 10 is connected with a diffuser cyclone separation structure 20, which may be an integral structure or may be connected together by welding or other means. In the present embodiment, the breather valve body 10 is cylindrical, and the filter layer structure 13 is located in the cylindrical breather valve body 10; the diffusion cyclone separation structure 20 is located at the bottom end of the ventilation valve main body 10, and is mainly used for primarily separating and capturing liquid drops, the diffusion pressing piece 21 and the cyclone separation piece 22 of the diffusion cyclone separation structure 20 can be of an integrated structure, and can be connected together in other modes such as welding, wherein the cyclone separation piece 22 is cylindrical and is directly connected with the ventilation valve main body 10, the cyclone separation piece 22 comprises a cyclone cylinder 221 and a rotary guide vane structure 23 arranged in the cyclone cylinder 221, in the embodiment, the inner diameter of the cyclone cylinder 221 is 5 mm-9 mm, the wall thickness is 1 mm-3 mm, and the height is 10 mm-14 mm.
When the breather valve works, gas carrying oil drops firstly enters the diffusion cyclone separation structure 20, the diffusion piece 21 in the diffusion cyclone separation structure 20 realizes preliminary collection of large-particle oil drops and flows back into the equipment along the diffusion piece 21, then the gas enters the cyclone separation piece 22, the rotating guide vane structure 23 in the cyclone separation piece 22 can realize further collection and separation of the oil drops, the collected oil drops flow back into the equipment through the diffusion piece 21, the gas passing through the diffusion cyclone separation structure 20 enters the filter layer structure 13 in the breather valve main body 10, the filter layer structure 13 can realize multi-layer separation collection of the oil drops, and the collected oil drops flow back into the equipment through the cyclone separation piece 22 at the lower part.
According to one embodiment of the invention, as shown in fig. 3, the diffuser 21 has a diffuser passage K which tapers radially in the direction towards the cyclone 22. The part can realize that the liquid-containing airflow is quickly rushed and accelerated to enter the upper rotary guide vane structure 23, and the liquid drops can be primarily trapped after the liquid drops impact the wall surface of the diffuser 21.
Further, the inner wall surface N of the diffusion passage K includes a strong oil-repellent annular surface 211 and a strong oil-repellent annular surface 212, and the strong oil-repellent annular surface 212 and the strong oil-repellent annular surface 211 are sequentially arranged in a direction toward the cyclone separator 22; the contact angle of the oil drop of the strong oil-repellent annular surface 211 is larger than or equal to 150 degrees, the contact angle of the oil drop of the strong oil-philic annular surface 212 is 0-10 degrees, and the intercepting and refluxing effects on the liquid drop can be improved by arranging annular surfaces with different contact angles of the oil drops.
Specifically, in this embodiment, the diffuser 21 is designed to have a narrow top and a wide bottom, wherein the height a of the diffuser 21 is 5mm to 8mm, the wall thickness b is 1mm to 3mm, and the diameter d of the necking end 1 3 mm-5 mm, diameter d of flaring end 2 The flow rate increase double value is determined from 8mm to 10mm by the following formula:
wherein M is the flow rate increase by a factor of two; r is R 1 、R 2 The radii of the flaring end and the necking end are respectively m; lambda is a resistance coefficient and the value is 0.01-0.05;
the angle of the diffusion opening is 20-70 degrees.
The active liquid discharge of the diffuser 21 is realized by the asymmetric strong oil-repellent ring surface 211 and the strong oil-philic ring surface 212, wherein the lower part of the inner wall surface N of the diffuser 21, namely the height a of about 3/4-4/5 of the diffuser 21, is formed into the strong oil-philic ring surface 212 by using a mask and a needle to spray the modifying solution, and the upper part of the inner wall surface N of the diffuser 21, namely the height a of about 1/5-1/4 of the diffuser 21, is formed into the strong oil-repellent ring surface 211 by using a needle to spray the modifying solution and a sharp etching method, the oil drop contact angle of the strong oil-repellent ring surface 211 is not less than 150 degrees, wherein the strong oil-repellent ring surface 211 is favorable for splashing in a box body or adhering oil drops running at a high speed along with air flow, and the strong oil-repellent ring surface 211 is favorable for forming a liquid flow barrier at the junction of two areas, so that the liquid trapped by the strong oil-philic ring surface 212 cannot continuously flow upwards along with the air flow, continuously gathers at the junction of the two areas and then automatically discharges back downwards due to the action of gravity, thereby improving the interception reflux effect of liquid drops.
According to one embodiment of the invention, as shown in fig. 4, the rotary vane structure 23 comprises a central shaft 231 and a first vane structure 232 and a second vane structure 233 connected to the central shaft 231, the first vane structure 232 having a plurality of first blades 234 arranged in a first direction of rotation a, the second vane structure 233 having a plurality of second blades 235 arranged in a second direction of rotation B, the first direction of rotation a being opposite to the second direction of rotation B.
The rotary vane structure 23 separates liquid droplets from the air stream by using centrifugal force generated during the rotation of the high-speed air stream formed by the diffuser 21 along the multiple blades; the first blades 234 and the second blades 235 are arranged in opposite rotation directions, so that the airflow is forced to form cross flow reversion, reverse steady flow rotation is changed into forward steady flow rotation, double inertial acceleration is realized, and the inertial trapping of liquid drops is accelerated.
Specifically, as shown in fig. 1 and 5, the upper and lower positions of the second guide vane structure 233 and the first guide vane structure 232 with opposite rotation directions are fixed on the central shaft 231 and are arranged in the cyclone separator 22, in this embodiment, the height h of the central shaft 231 is 10 mm-14 mm, the first rotation direction a of the first guide vane structure 232 with the diameter d of 1 mm-1.5 mm can be counterclockwise, the second rotation direction B of the second guide vane structure 233 is clockwise, the distance c between the first guide vane structure 232 and the second guide vane structure 233 is 0.1 mm-0.5 mm, the number of blades (i.e., the first blade 234 and the second blade 235) of the first guide vane structure and the second guide vane structure are 6-9, the blades are all equidistantly arranged, the distance e is about 0.4mm, and the thickness f of the blades is about 0.1 mm.
The vane functions in the first vane structure 232 and the second vane structure 233 are specially made, so that the phenomenon that large-size lubricating oil drops are wrapped and escaped by air flow due to the working condition of sudden increase of exhaust gas quantity during engine starting and sudden acceleration can be effectively prevented, and specific manufacturing parameters of the vanes are determined by the following formula:
y＝σε -1 x 2 +[σ(1-R 3 ε -1 sinβ)-0.1H]x+0.9H
wherein σ=0.1h [1-9 (R 3 sinα) -1 ]
ε＝(ω 2 -R 3 ωsinα) -1
ω＝0.1Hcotα
As shown in fig. 5Wherein R is 3 The outer diameter of the blade is 2 mm-4 mm; h is the height of the blade, which is 4 mm-6 mm; alpha is the angle of the blade outlet angle and is 40-70 degrees; beta is the blade wrap angle, 80-120 degrees; sigma, omega and epsilon have no specific meaning.
As shown in FIG. 6, the vane function is calculated based on the projection of the vane onto the two-dimensional plane of the center axis 231, the y-axis is vertically upward, the x-axis is horizontally leftward in the projection plane, and the function curve is stretched R in the direction perpendicular to the projection plane 3 The three-dimensional graph obtained by the length is the required blade, the blade function of the first guide vane structure 232 is given here, and the blade function of the second guide vane structure 233 is y-axis symmetrical with the blade function, so that the description is omitted. In the running process of the device, the high-speed liquid-containing airflow firstly enters the first guide vane structure 232, primary inertial separation of liquid drops is realized under the action of centrifugal force, the separated liquid drops flow back along the cylinder wall of the cyclone separation piece 22, then enter the second guide vane structure 233 for secondary separation, the airflow is forced to form cross flow reversion by the second blades 235 of the second guide vane structure 233 with the opposite rotation direction with the first guide vane structure 232, reverse steady flow rotation is suddenly changed into forward steady flow rotation, so that double inertial acceleration is realized, the inertial capture of the liquid drops is accelerated, in addition, the airflow can be quickly changed into forward flow from reverse direction due to the existence of a tiny space c between the first guide vane structure 232 and the second guide vane structure 233, the liquid-containing airflow is impacted on the lower side of the second guide vane structure 233 under the action of inertia at the moment of transition, so that the capture action of the liquid drops is further enhanced, meanwhile, the liquid drops captured by the first blades 234 and the second blades 235 can be reversely discharged along the respective blades under the action of self gravity and the chamfer angle, so that the backflow of the liquid drops captured by the inertia is accelerated, and the upward drag flow generated by the effect of the captured liquid drops under the action of the air flow is reduced.
According to one embodiment of the present invention, as shown in fig. 1 and 2, the filter layer structure 13 includes a metal filter layer 131, a non-metal filter layer 132, and an oil-repellent water-repellent film 134 that are sequentially stacked, wherein the metal filter layer 131 is located at the bottom of the breather valve body 10 and is connected to the rotary vane structure 23.
The metal filter layer 131 can realize the secondary filtration and trapping of oil drops passing through the diffusion cyclone separation structure 20, the nonmetal filter layer 132 positioned at the upper part of the metal filter layer 131 can realize the tertiary filtration and trapping of the oil drops, and the oil-repellent water-repellent film 134 positioned at the top can realize the quaternary interception of the oil drops.
According to one embodiment of the present invention, as shown in fig. 7, the metal filter layer 131 includes a central circular region 1311 at a central position, and a saw tooth inner ring region 1312 and a saw tooth outer ring region 1313 at edge positions, and a saw tooth structure 1314 is provided at the junction of the saw tooth inner ring region 1312 and the saw tooth outer ring region 1313. The metal filter layer 131 is arranged in the valve body 11, the bottom of the metal filter layer 131 is welded on the rotary guide vane structure 23, the strength of the filter membrane material above the metal filter layer 131 and the rotary guide vane structure 23 can be increased, the pressure resistance and the high temperature resistance of the ventilation valve are improved, and meanwhile, the interception effect of liquid drops can be effectively improved.
Further, the central circular region 1311 and the serration outer-ring region 1313 are super-oil-repellent, water-repellent regions, and the serration inner-ring region 1312 is a super-oleophilic, hydrophilic region.
Specifically, as shown in fig. 2, the metal filter layer 131 in this embodiment is a locally modified metal fiber felt, and the locally modified metal fiber felt is made of metal fibers, so that the metal filter layer has high compression resistance and high temperature resistance, the metal texture of the locally modified metal fiber felt is easy to be connected with the central shaft 231 of the rotary vane structure 23 at the bottom in a spot welding manner, and after the connection is completed, the locally modified metal fiber felt can be directly and reversely buckled in the bottom valve port area of the valve body 11, so that the strength of the cyclone element under the high-air-speed condition can be ensured, and the locally modified metal fiber felt has the characteristics of simple welding and quick installation.
The partially modified metal fiber felt in this embodiment is of diameter D 1 A circular element with a size of 16 mm-18 mm and a common size of 17.5mm is divided into a central circular area 1311, a sawtooth inner ring area 1312 and a sawtooth outer ring area 1313 from inside to outside according to different functions, and a sawtooth structure 1314 is arranged at the joint of the sawtooth inner ring area 1312 and the sawtooth outer ring area 1313. Wherein the diameter of the central circular region 1311 is 85% -95% of the inner diameter size of the cyclone 22, and the region uses electrochemistryThe method of spraying or vapor deposition is treated into an ultra-oil-repellent and water-repellent area, so that upward impact penetration of liquid drops impacted by high-speed air flow inertia can be effectively prevented. The saw tooth inner ring region 1312 is a super-oleophilic hydrophilic treatment region with an inner diameter equal to the diameter of the central circular region 1311 and an outer diameter equal to the diameter of the saw tooth circumscribed circle.
The diameter of the metal filter layer 131 is D 1 The number of teeth of the tooth structure 1314 is n 1 ，n 1 Is determined by the following formula:
wherein D is 1 The diameter of the sawtooth circumscribed circle is in mm; l (L) 1 The length of the sawtooth bevel edge is 1-3 mm;
the saw tooth angle is 15-60 degrees; equation calculation value n 1 For rounding down, uniform distribution of the saw teeth and no overlapping can be ensured.
The saw tooth outer ring area 1313 is an area except the central circular area 1311 and the saw tooth inner ring area 1312 of the locally modified metal fiber felt, the area is treated into super oil-repellent water-repellent area by adopting the same method as the central circular area 1311, and liquid drops entering the area enter the super-oleophilic hydrophilic area under the action of gradient force caused by the wettability difference between the area and the adjacent area, so that the accumulation of liquid at the edge corners of the locally modified metal fiber felt is effectively prevented, and the local ulcer and unsmooth liquid discharge of the filter material are caused.
The local modified metal fiber felt is also used for supporting the nonmetal filter layer 132 above the metal fiber felt, when the liquid drop concentration is higher or the running time of equipment is longer, the nonmetal filter layer 132 is easy to reach an oversaturated or wetted state, and the local modified metal fiber felt can effectively prevent the filter material from sinking and damaging phenomena caused by the negative pressure working condition of the nonmetal filter layer 132 in the state, thereby effectively improving the strength and the service life of the filter membrane material.
According to one embodiment of the present invention, as shown in fig. 8 and 9, the non-metallic filter layer 132 is composed of a plurality of non-metallic fiber filter layers arranged in a stack; the nonmetallic fiber filtering layer comprises a sawtooth inner area 1321 positioned at the central position and a sawtooth outer ring area 1322 positioned at the edge position, and a sawtooth structure 1323 is arranged at the joint of the sawtooth inner area 1321 and the sawtooth outer ring area 1322.
Further, the sawtooth inner region 1321 is a super oil-repellent water-repellent region, the sawtooth outer ring region 1322 is a super oil-repellent hydrophilic region, and the contact angle of oil drops in the sawtooth outer ring region 1322 of each nonmetallic fiber filter layer sequentially increases in the direction away from the metallic filter layer 131. The nonmetal filter layer 132 is mainly used for capturing small-size liquid drops which are not filtered and intercepted by the diffusion cyclone separation structure 20 and the metal filter layer 131, and further enhancing the filtering performance of the ventilation valve on various-size liquid drops in different particle size ranges. Still further, the area of the jagged outer annular region 1322 of the non-metallic filter layer 132 is greater than the area of the jagged outer annular region 1313 of the metallic filter layer 131.
Specifically, in this embodiment, the nonmetallic filter layer is formed by four layers of nonmetallic fiber filter elements with different modification treatments, and the nonmetallic fiber filter elements and the partially modified metallic fiber felt are tightly stacked and built in the valve body 11, and the diameters D of the nonmetallic fiber filter elements and the partially modified metallic fiber felt are 1 The same and placed in turn from bottom to top, the first nonmetallic fiber filter layer is the main trapping layer of the liquid drop, as shown in fig. 9, the layer is divided into a sawtooth inner area 1321 and a sawtooth outer ring area 1322, wherein the sawtooth inner area 1321 has the same number and sawtooth angle as the sawtooth in the metallic filter layer 131, and the length L of the sawtooth hypotenuse 2 Is determined by the following formula:
wherein D is 1 、L 1 And D 2 、L 2 The diameter of the sawtooth circumcircle and the length of the sawtooth hypotenuse in the metal filter layer 131 and the first nonmetallic fiber filter layer are respectively in mm, the area is modified into an ultra-oil-repellent water-repellent area (the contact angle of liquid drops is not less than 150 ℃), and an area with a gap of 0.2-1.0 mm is reserved at the outer edge of the sawtooth, namely, the area of the sawtooth outer ring1322, the region is treated as a super-oleophilic hydrophilic region (super-hydrophilic region, the contact angle of the liquid drops is 0-10 °), when the liquid drops enter the metal filter layer 131 along with the air flow, the sawtooth inner region 1321 intercepts most of the liquid drops outside, the sawtooth outer ring region 1322 becomes an outer annular communication region, not only can absorb and trap the liquid drops entering the region, but also is convenient for the liquid in different sawtooth regions to mutually permeate, and avoids the phenomenon of excessive accumulated liquid in a few sawtooth regions.
As can be seen from the foregoing, the area of the sawtooth outer ring region 1322 of the first non-metal fiber filter layer is larger than the area of the sawtooth outer ring region 1313 of the metal filter layer 131, that is, the range of the oleophilic region of the layer is larger than the range of the outer oleophobic region of the metal fiber layer at the bottom of the layer, and the number and angle of the sawtooth of the two filter layers are the same, so that the strong lyophile overlapping region exists between the present filter layer and the metal filter layer 131 at the bottom of the present filter layer, and the region forms a liquid conveying channel, so that a large amount of liquid trapped in the sawtooth outer ring region 1322 can be quickly and directionally flowed to the sawtooth inner ring region 1312 of the metal filter layer 131 under the sawtooth tip effect and the plane wettability difference effect of the present filter layer, and then be quickly discharged back to the box body through the bottom air inlet.
Wherein, the sawtooth tip effect is that the sawtooth tip causes the shape gradient in the plane, after the liquid drop enters the sawtooth region, the liquid drop near the tip is not easy to spread due to the smaller pattern area, the contact angle of the part is larger, the corresponding pattern area relatively far away from the tip is larger, the liquid drop is easy to spread, the contact angle of the liquid drop is relatively smaller, and the difference of the contact angles of the liquid drop before and after the liquid drop leads to the generation of the Laplace pressure F from the tip to the bottom L Promote the liquid drop to move from the tip to the bottom, and the Laplace pressure F L Is determined by the following formula:
wherein F is L The Laplace pressure is given by N; f is the surface tension of the droplet in N/m; s is the contact area of the liquid drop and the plane, and the unit is m 2 ；R 4 、R 5 The radius of the droplet in m is expressed as the droplet relatively far from the tip and near the tip, respectively.
The plane wettability difference effect refers to that the difference of contact angles of liquid drops in different areas of the plane is larger due to the difference of wettability in the same plane, the larger the contact angle value is, the higher the surface energy of the liquid drops is, the easier the liquid drops are to migrate to the area (more wettable area) with reduced surface energy, and the force which is generated by the difference of wettability in the plane and promotes the migration of the liquid drops is the wettability gradient force F L * Determined by the following formula:
wherein F is L * Is a wettability gradient force, and the unit is N; f is the surface tension of the droplet in N/m; r is R 6 The unit is m, which is the base radius of the liquid drop in contact with the plane; θ 1 、θ 2 The contact angles of the drops in the strongly and weakly wetting regions are expressed in degrees, respectively.
At Laplace pressure F L Under the synergistic effect of the wettability gradient force, the directional migration effect of the liquid drops is accelerated. The second non-metallic fiber filter layer 132b is the same modified as the in-saw tooth area 1321 of the first non-metallic fiber filter layer 132a, but the saw tooth outer ring area 1322 is a strongly wetted area (liquid contact angle is 10 ° to 30 °), the third non-metallic fiber filter layer 132c is the same modified as the in-saw tooth area 1321 of the first non-metallic fiber filter layer 132a, but the saw tooth outer ring area 1322 is a moderately wetted area (liquid contact angle is 30 ° to 50 °), the fourth non-metallic fiber filter layer 132d is the same modified as the in-saw tooth area 1321 of the first non-metallic fiber filter layer 132a, but the saw tooth outer ring area 1322 is a weakly wetted area (liquid contact angle is 50 ° to 70 °), as shown in fig. 8.
As a further preferred aspect of the present invention, in another embodiment of the present invention, the non-metallic filter layer 132 may be increased in the number of layers of non-metallic fiber filter layers as desired, which is the same modified as the inner region 1321 of the serration of the first non-metallic fiber filter layer, but the outer region 1322 of the serration is a weak wetting region (liquid contact angle is 50 ° to 70 °).
The arrangement mode that the wettability of the nonmetallic fiber filter element is gradually decreased from bottom to top in the sawtooth inner region 1321 can realize that most of liquid drops are captured and intercepted in the lower filter layer, so that the filtering efficiency of the liquid drops is guaranteed, the cleanliness of the upper filter layer is improved, the air permeability of the filter layer is improved, and the downward liquid drainage and backflow of the liquid drops under the action of the wettability gradient can be realized.
According to one embodiment of the invention, an outer serration structure 135 is provided at the edge of the serration structure of the non-metallic filter layer 132 and/or at the edge of the serration structure of the metallic filter layer 131. Specifically, as shown in fig. 10, the zigzag structure of the metal filter layer 131 and the non-metal filter layer 132 can be further modified into a vertically and horizontally composite zigzag structure, i.e. the linear edges on both sides of the zigzag are modified into uniformly distributed outer zigzag structures 135, and the length L of the zigzag edges 3 Is 0.8 mm-1.0 mm, and the saw tooth angle
The liquid collecting and draining capacity is further increased under the compound saw tooth tip effect at 15-60 degrees.
According to one embodiment of the present invention, as shown in FIG. 11, the intra-serration area 1321 of the non-metallic filter layer 132 and/or the central circular area 1311 of the metallic filter layer 131 are provided with at least one lyophilic strip 14, which may be used in high speed operation gearboxes or where the oil mist content is significantly higher. Further, as shown in fig. 12, a saw tooth structure 141 is provided at the edge of the lyophilic strip 14.
Specifically, under the working condition that the oil mist concentration is higher, the lyophilic strips 14 may be disposed inside the non-metal filtering layer 132 and/or the metal filtering layer 131 (the number of pairs of lyophilic strips 14 may be 1 pair, 2 pairs, and 3 pairs according to the requirement), as shown in fig. 11, the strips are disposed in pairs, in this embodiment, the width g of the lyophilic strips 14 is 0.2 mm-1.0 mm, the lyophilic strips 14 are disposed in pairs, and the angles between the two pairs of lyophilic strips 14 are 90 ° perpendicular to each other, which of course only provides the case of a pair of lyophilic strips 14, and multiple sets of lyophilic strips 14 may be disposed according to the actual requirement, where the angles between the lyophilic strips 14 are 45 ° when two sets of lyophilic strips 14 are disposed, and the angles between the lyophilic strips 14 are 30 ° when three pairs of lyophilic strips 14 are disposed, which is not limited. The arrangement of the lyophilic strips 14 breaks down the pressure of the liquid discharged from a single area, and the liquid drops can not only move to the lyophilic edge area, but also move to the lyophilic strips 14 area, and follow the principle of 'nearby liquid discharge', so that the arrangement of the lyophilic strips 14 is beneficial to the rapid aggregation and directional diversion and displacement of the liquid in the circular inner area.
Further, under severe conditions with extremely high oil mist concentration, as shown in FIG. 12, each lyophilic strip 14 may be provided with a saw tooth structure 141 on both sides, wherein the saw tooth angle
15-60 DEG, length L of the bevel edge of the saw tooth 4 The liquid is 1 mm-1.5 mm, and the rapid collection of the liquid in the sub-region is more promoted under the sawtooth tip effect.
According to one embodiment of the present invention, as shown in fig. 1, a film placing table 133 is disposed between the non-metal filter layer 132 and the oil and water repellent film 134, the film placing table 133 includes an opening area 1332 at a central position and an annular area 1331 at an edge position, and the oil and water repellent film 134 is disposed on the opening area 1332.
Specifically, as shown in fig. 2 and 13, the membrane placing table 133 in this embodiment is circular, and is mainly used for placing the top oil-repellent water-repellent film 134, which has the same diameter as the inner diameter of the valve body 11, and is placed in the valve body 11 at a position about 2mm higher than the total height of the metal filter layer and the nonmetal filter layer, and has a thickness of 0.8mm. The membrane placing table 133 is composed of an annular region 1331 with the annular width of about 0.5mm and an opening region 1332 uniformly provided with circular holes with the interval of 0.1-0.3 mm and the diameter of 1-2 mm, the annular region 1331 is designed to facilitate the connection of the membrane placing table 133 and the valve body 11 in an ultrasonic welding mode and the like, and the opening region 1332 is provided with circular holes which are mainly used for realizing quick passage of gas and reducing the influence on the air permeability of the multistage coupling type air-permeable valve.
The oil-repellent water-repellent film 134 is fixed on the film placing table 133 by ultrasonic welding, adhesive bonding or other means, and has the same size as the nonmetallic filter layer 132, and is mainly used for preventing liquid drops and dust impurities in the air from entering the ventilation valve, so as to influence the normal operation of the equipment. The oil and water repellent film layer 134 is typically an ePTFE film or other dense polymeric material film.
According to one embodiment of the present invention, as shown in fig. 1, the breather valve body 10 further includes a valve body 11 and a bonnet 12 fastened together, the opening edge of the valve body 11 is provided with a plurality of grooves 112 along its circumferential direction, the top of the bonnet 12 is provided with a plurality of bosses 121 along its circumferential direction, and the bosses 121 are embedded in the grooves 112 in a state that the bonnet 12 is fastened to the valve body 11.
Further, as shown in fig. 14 and 15, at least one vent hole 111 is formed in the sidewall of the valve body 11 along the circumferential direction thereof, and the bonnet 12 has an outer circumferential wall extending toward the valve body 11, and the at least one vent hole 111 is blocked by the outer circumferential wall.
Specifically, as shown in fig. 15, the valve body 11 in this embodiment is cylindrical, the inner diameter is 16 mm-18 mm, the wall thickness is 1 mm-3 mm, the difference between the height of the valve body 11 and the total height of the metal filter layer 131 and the nonmetal filter layer 132 in the valve body is 8 mm-10 mm, 4-6 evenly distributed grooves 112 are formed in the upper edge of the valve body 11, the groove depth is 0.5 mm-1 mm, and the length is 4 mm-6 mm; two rectangular ventilation holes 111 which are symmetrically distributed are formed at the position about 1mm away from the lower edge of the groove 112, so that the internal and external pressure of the box body can be balanced conveniently, the width of the rectangular ventilation holes is 1 mm-1.5 mm, and the length of the rectangular ventilation holes is 15 mm-20 mm; as described above, a space with a height of 2.5mm to 5.5mm is provided between the ventilation holes 111 and the oil-repellent film 134, which is mainly used for buffering the air flow entering through the ventilation holes 111, and preventing the impact damage to the filter element caused by the too high flow rate.
As shown in fig. 2 and 14, the outer diameter of the valve cap 12 in this embodiment is 2 mm-4 mm larger than the outer diameter of the valve body 11, and 1 mm-2 mm thick, the cap peak extends downward to 0.8 mm-1.2 mm beyond the ventilation holes, and a boss 121 is embedded in the valve cap 12 and is matched and connected with the groove 112 on the valve body 11. The bonnet 12 covers the top of the protective shell, and the design of the cap peak can prevent large particle pollutants in the air from entering the ventilation valve through the ventilation holes to influence the normal operation of the equipment, and can ensure that the air normally enters the ventilation valve to maintain the balance of internal pressure and external pressure in the working state of the equipment. Specifically, the valve cap 12 is made of nylon or metal, and is manufactured into a composite buckle type by adopting a 3D printing technology or turning pin processing.
According to one embodiment of the present invention, as shown in fig. 2, a retention sheet 113 is provided in the ventilation valve body 10, and the retention sheet 113 is configured such that a metal filter layer 131 and a non-metal filter layer 132 are press-fitted and fixed in the ventilation valve body 10.
Specifically, as shown in fig. 15, in this embodiment, four retention pieces 113 with a length and a width of 0.5mm and a thickness of 0.2mm to 0.5mm are equidistantly installed inside the valve body 11, and the installation height thereof is the total height of the metal filter layer 131 and the nonmetal filter layer 132, and this design can realize the fixation of the filter layer structure 13, and prevent the filter layer structure 13 from moving upwards and dislocating due to pressure variation or severe vibration.
According to the multistage coupling type ventilation valve, when the multistage coupling type ventilation valve is installed, the cyclone cylinder 221 in the diffusion cyclone separation structure 20 is matched and connected with a workpiece to be installed, as shown in fig. 16, 17 and 18, three cyclone cylinders 221 in matched forms are provided, namely a threaded matched type, a double-sealing ring matched type and a snap-fit type, so that the installation requirements of different equipment can be met, and the practicability of the ventilation valve is improved.
The foregoing description of the embodiments has been provided for the purpose of illustrating the general principles of the invention, and is not meant to limit the scope of the invention, but to limit the invention to the particular embodiments, and any modifications, equivalents, improvements, etc. that fall within the spirit and principles of the invention are intended to be included within the scope of the invention.
Claims (17)
1. A multi-stage coupled ventilation valve, comprising:
the ventilation valve main body is internally provided with a filter layer structure;
the diffusion cyclone separation structure is provided with a diffusion piece and a cyclone separation piece which are connected, the cyclone separation piece is connected with the ventilation valve main body, and a rotary guide vane structure is arranged in the cyclone separation piece.
2. The multi-stage coupled ventilation valve of claim 1, wherein the rotary vane structure comprises a central shaft and first and second vane structures connected to the central shaft, the first vane structure having a plurality of first blades arranged in a first rotational direction and the second vane structure having a plurality of second blades arranged in a second rotational direction, the first rotational direction being opposite the second rotational direction.
3. The multi-stage coupled ventilation valve of claim 1 or 2, wherein the diffuser has a diffuser passage that tapers radially in a direction toward the cyclonic separating member.
4. The multi-stage coupled breather valve of claim 3, wherein the inner wall surface of the diffuser passage comprises a strong oil-repellent annulus and a strong oil-philic annulus, the strong oil-philic annulus and the strong oil-repellent annulus being disposed in sequence in a direction toward the cyclonic separating member; the oil drop contact angle of the strong oil-repellent area is larger than or equal to 150 degrees, and the oil drop contact angle of the strong oil-philic area is 0-10 degrees.
5. The multi-stage coupled breather valve of claim 1, wherein the filter layer structure comprises a metal filter layer, a non-metal filter layer, and an oil and water repellent film layer that are sequentially stacked, wherein the metal filter layer is located at the bottom of the breather valve body and is connected to the rotary vane structure.
6. The multi-stage coupled ventilation valve of claim 5, wherein the metal filter layer comprises a central circular region at a central location, and a serrated inner ring region and a serrated outer ring region at edge locations, wherein the intersection of the serrated inner ring region and the serrated outer ring region is provided with a serrated structure.
7. The multi-stage coupled breather valve of claim 6, wherein the central circular region and the outer zigzag ring region are super oil and water repellent regions, and the inner zigzag ring region is a super oleophilic hydrophilic region.
8. The multi-stage coupled ventilation valve of claim 5, wherein the non-metallic filter layer is comprised of a plurality of non-metallic fibrous filter layers arranged in a stack; the nonmetallic fiber filter layer comprises a sawtooth inner area positioned at the central position and a sawtooth outer ring area positioned at the edge position, and a sawtooth structure is arranged at the joint of the sawtooth inner area and the sawtooth outer ring area.
9. The multi-stage coupled ventilation valve of claim 8, wherein the inner region of the serration is a super-oil and water repellent region, the outer region of the serration is a super-oleophilic hydrophilic region, and the contact angle of oil drops in the outer region of the serration of each of the non-metallic filter layers increases in sequence in a direction away from the metallic filter layer.
10. The multi-stage coupled ventilation valve of claim 6 or 8, wherein an area of the zigzag outer ring region of the non-metallic filter layer is greater than an area of the zigzag outer ring region of the metallic filter layer.
11. The multi-stage coupled ventilation valve of claim 6 or 8, wherein the intra-serration region of the non-metallic filter layer and/or the central circular region of the metallic filter layer is provided with at least one lyophile strip.
12. The multi-stage coupled ventilation valve of claim 11, wherein the edges of the lyophile strips are provided with a saw tooth structure.
13. The multi-stage coupled ventilation valve of claim 6 or 8, wherein an outer serration structure is provided at an edge of the serration structure of the non-metallic filter layer and/or at an edge of the serration structure of the metallic filter layer.
14. The multi-stage coupled breather valve of claim 5, wherein a membrane placement platform is disposed between the non-metallic filter layer and the oil and water repellent membrane layer, the membrane placement platform comprising an open area at a central location and an annular area at an edge location, the oil and water repellent membrane layer disposed on the open area.
15. The multi-stage coupling type breather valve according to claim 1, wherein the breather valve body comprises a valve body and a bonnet fastened together, a plurality of grooves are provided at an opening edge of the valve body along a circumferential direction thereof, a plurality of bosses are provided at a top of the bonnet along a circumferential direction thereof, and the bosses are embedded in the grooves in a state that the bonnet is fastened to the valve body.
16. The multi-stage coupled breather valve of claim 15, wherein the sidewall of the valve body is provided with at least one breather hole along a circumferential direction thereof, the bonnet has an outer annular wall extending toward the valve body, and at least one of the breather holes is blocked by the outer annular wall.
17. The multi-stage coupled breather valve of claim 5, wherein a retention tab is disposed within the breather valve body, the retention tab configured to secure the metallic filter layer and the non-metallic filter layer laminated within the breather valve body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211094459.3A CN116293022A (en) | 2022-09-08 | 2022-09-08 | Multistage coupling type breather valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211094459.3A CN116293022A (en) | 2022-09-08 | 2022-09-08 | Multistage coupling type breather valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116293022A true CN116293022A (en) | 2023-06-23 |
Family
ID=86820950
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211094459.3A Pending CN116293022A (en) | 2022-09-08 | 2022-09-08 | Multistage coupling type breather valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116293022A (en) |
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2022
- 2022-09-08 CN CN202211094459.3A patent/CN116293022A/en active Pending
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