CN110056456B - Prefilter assembly of air cleaner - Google Patents
Prefilter assembly of air cleaner Download PDFInfo
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- CN110056456B CN110056456B CN201910448890.5A CN201910448890A CN110056456B CN 110056456 B CN110056456 B CN 110056456B CN 201910448890 A CN201910448890 A CN 201910448890A CN 110056456 B CN110056456 B CN 110056456B
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- cyclone
- cyclone tube
- tube
- dust
- assembly
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- 238000011045 prefiltration Methods 0.000 title claims abstract description 49
- 238000007789 sealing Methods 0.000 claims description 45
- 230000002093 peripheral effect Effects 0.000 claims description 17
- 230000003014 reinforcing effect Effects 0.000 claims description 7
- 238000003825 pressing Methods 0.000 claims description 6
- 238000009434 installation Methods 0.000 abstract description 25
- 239000000428 dust Substances 0.000 description 125
- 238000007599 discharging Methods 0.000 description 36
- 239000003344 environmental pollutant Substances 0.000 description 21
- 231100000719 pollutant Toxicity 0.000 description 21
- 239000000306 component Substances 0.000 description 16
- 238000002347 injection Methods 0.000 description 12
- 239000007924 injection Substances 0.000 description 12
- 238000001914 filtration Methods 0.000 description 10
- 239000002245 particle Substances 0.000 description 10
- 230000005484 gravity Effects 0.000 description 9
- 239000012530 fluid Substances 0.000 description 7
- 239000004576 sand Substances 0.000 description 7
- 239000000356 contaminant Substances 0.000 description 6
- 230000005489 elastic deformation Effects 0.000 description 5
- 238000012423 maintenance Methods 0.000 description 5
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 230000008021 deposition Effects 0.000 description 4
- 238000001746 injection moulding Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000011010 flushing procedure Methods 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 229920002725 thermoplastic elastomer Polymers 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/02—Air cleaners
- F02M35/022—Air cleaners acting by gravity, by centrifugal, or by other inertial forces, e.g. with moistened walls
- F02M35/0223—Air cleaners acting by gravity, by centrifugal, or by other inertial forces, e.g. with moistened walls by centrifugal forces, e.g. cyclones
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Cyclones (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
The invention discloses a prefilter assembly of an air filter, wherein a plurality of cyclone pipes of the prefilter assembly are arranged in an upper cover, and each cyclone pipe is independently arranged; the cyclone tube sleeves are integrated on the lower cover, and the cyclone sheet at the periphery of the lower part of each cyclone tube is inserted into the cyclone tube sleeve and positioned at the opening of the sleeve. After the lower cover and the cyclone tube sleeve are integrally designed, the assembly steps are omitted between the cyclone tube sleeve and the lower cover, the installation gaps among the components are avoided, the installation cost is saved, the problems of installation dislocation or neglected loading are prevented, the concentricity and verticality requirements among the components are ensured, the tightness among the components is improved, and the prefiltering efficiency is further improved. The cyclone tube sleeve and the lower cover are integrated into a whole, and the cyclone tube is independently assembled, so that the flexibility of the cyclone tube assembled into the cyclone tube sleeve is ensured, the phenomenon that the cyclone tube is limited during assembly is avoided, and the assembly is easier to operate.
Description
Technical Field
The invention relates to the field of air filters of air inlet systems of engines, in particular to a prefilter assembly of an air filter.
Background
The engine is used as a power source of vehicles and engineering mechanical equipment, and the performance of the air inlet system directly influences the power output performance of the engine. The air inlet system of the engine mainly comprises three parts of a prefilter assembly, an air inlet pipeline and an air filter. The air filter is a core component of an air inlet system of the engine, and is mainly used for filtering pollutants such as dust, sand and the like in the air to provide clean air for the engine.
The desert air filter is a generic name of an air filter which integrates two parts of a prefilter assembly and an air inlet pipeline of an air inlet system into one shell, and the number of swirl tubes of the prefilter assembly is more, so that the desert air filter can be applied to vehicles used in severe working conditions such as mines, sand and stone factories, desert areas and the like with very high dust concentration for a long time. The working principle of the desert air filter is as follows: air in the atmosphere enters from an air inlet of the desert air filter under the driving of the negative pressure of the engine, passes through the prefilter assembly in the shell, and is subjected to primary filtration. The dirty outdoor air containing dust and sand particles generates rotational flow in the rotational flow pipe of the prefilter assembly, and the dust and sand particles with larger particle size and heavier weight are separated from the air; the cleaner air obtained after the primary filtration is subjected to secondary filtration through the main filter element and the safety filter element in the air filter, dust and the like with smaller particle size and lighter weight are intercepted by the filter element, and clean air is finally obtained and discharged from the air outlet of the cleaner air into the engine. With the continuous accumulation of working time, the quantity of pollutants filtered by the outer surface of the filter paper of the main filter element of the air filter is continuously increased, and finally the maximum resistance and dust holding capacity allowed by the design of the filter paper can be reached, namely the service life of the filter element is reached, and the filter element needs to be replaced at the moment.
As shown in fig. 1, the existing desert air filter is shown in fig. 1, a main filter element 2, a prefilter assembly 3 and a dust collecting cover assembly 5 are sequentially arranged in a shell 1 from top to bottom, an upper cover 31 of the prefilter assembly 3 is provided with a plurality of cyclone tubes 32 which are arranged in an array, the lower ends of the cyclone tubes 32 extend into cyclone tube sleeves 341, the lower ends of the cyclone tube sleeves 341 are sleeved on corresponding holes of a lower cover 34, and the upper surface of the upper cover 31 is a horizontal dust collecting surface 3100. The cyclone tube sleeve 341, the lower cover 34, and other components of the prefilter assembly 3 of the conventional desert air filter are generally manufactured and assembled independently. On the one hand, the assembly gaps among the parts are large, leakage points are large, and polluted air can enter the pre-filtering assembly 3 from the leakage points; on the other hand, the concentricity and verticality between the upper cover 31 and the cyclone tube 32, and between the cyclone tube sleeve 341 and the lower cover 34 are poor, resulting in poor sealability between the respective components, and thus, the prefilter efficiency of the prefilter assembly 3 is low. The assembly of each part of the traditional prefilter assembly 3 is basically finished by manpower, a large amount of manpower is required to be consumed, and the installation dislocation and even the neglected loading are easy to occur, so that the prefilter efficiency of the prefilter assembly 3 is affected, the production and assembly costs are high, each part has differences, the consistency and the stability of products are reduced, and the difficulty of maintenance of the products by end users is also increased. As shown in fig. 3, the lower end of the conventional cyclone tube 32 is cylindrical, when the cyclone tube 32 is inserted into the cyclone tube sleeve 341 below, if there is an assembly error that may cause the cyclone tube 32 to be skewed in the cyclone tube sleeve 341, the opening of the lower end of the skewed cylindrical cyclone tube 32 is very close to the inner wall of the cyclone tube sleeve 341, dirty air carrying dust is easy to block at the opening after entering, and dust pollutants separated at the opening are very easy to directly enter the cyclone tube 32 from the opening of the lower end of the cyclone tube 32 because of being very close to the opening of the lower end of the cyclone tube 32, so that the prefiltering efficiency of the cyclone tube 32 is reduced; the separated dust contaminants, if not entering the cyclone tube 32 from the lower end opening of the cyclone tube 32, cause an increase in air resistance therein, thereby decreasing the prefiltering efficiency. As shown in fig. 2, a circle of protruding portion 320 protrudes outwards from the periphery of the upper end of the cyclone tube 32, a boss 3101 is correspondingly arranged on the upper cover 31, the cyclone tube 32 is mounted on the upper cover 31 through the cooperation of the protruding portion 320 and the boss 3101, clearance fit is formed between the protruding portion and the boss 3101, the tightness of the matched position is poor, air is easy to leak from the matched position, and in the working process, the cyclone tube 32 is easy to loose under the action of external force.
Disclosure of Invention
The applicant provides a reasonable air filter prefilter assembly, which aims at the defects of low prefilter efficiency and the like caused by the fact that components such as a cyclone tube sleeve, a lower cover and the like of the existing desert air filter are manufactured and assembled independently, assembly gaps are large, leakage points are large, and the cyclone tube and cyclone sheet are integrated, the cyclone tube sleeve and the lower cover are integrated, so that the leakage points are reduced, and the prefilter efficiency is improved.
The technical scheme adopted by the invention is as follows:
a prefilter assembly of the air cleaner, a plurality of cyclone tubes of the prefilter assembly are arranged in an upper cover, and each cyclone tube is independently arranged; the cyclone tube sleeves are integrated on the lower cover, and the cyclone sheet at the periphery of the lower part of each cyclone tube is inserted into the cyclone tube sleeve and positioned at the opening of the sleeve.
The cyclone tube sleeve is integrated in the prefilter lower cover, and the lower cover and the cyclone tube sleeve are integrally formed by injection molding. After the integrated design is adopted, the assembling step is avoided between the cyclone tube sleeve and the lower cover, the installation gap between the components is avoided, the installation cost is saved, the problem of installation dislocation or neglected loading is prevented, the concentricity and perpendicularity requirements between the components are ensured, the tightness between the components is improved, and the prefiltering efficiency is further improved. The cyclone tube sleeve and the lower cover are integrated into a whole, each cyclone tube is independently inserted into the upper cover, and when the upper cover and the lower cover are buckled, each cyclone tube is required to be inserted into the cyclone tube sleeve corresponding to the cyclone tube sleeve.
As a further improvement of the above technical scheme:
the swirl plate is integrally integrated on the swirl tube.
The cyclone tube and the cyclone sheet are integrally formed by injection molding, so that the assembly steps are avoided, the installation gap between the parts is avoided, the installation cost is saved, the problems of installation dislocation or neglected loading are prevented, the concentricity and perpendicularity requirements between the parts are ensured, the tightness between the components is improved, and the prefiltering efficiency is further improved.
The contour dimension of the outermost periphery envelope line of the cyclone sheet is matched with the inner diameter of the cyclone tube sleeve.
The upper part of the cyclone tube is a cylindrical part, the lower part of the cyclone tube is a conical part, and the small diameter end of the conical part is 0.5-5 mm smaller than the large diameter end of the conical part.
The lower end of the cyclone tube is a cone part which contracts downwards, after the cyclone tube is inserted into the cyclone tube sleeve below, the distance between the outer surface of the cone part of the cyclone tube and the inner wall of the cyclone tube sleeve is large, dirty air carrying dust is not easy to block in the cyclone tube sleeve, even if the cyclone tube is skewed in the cyclone tube sleeve due to assembly errors, the outer surface of the cone part of the cyclone tube is still kept at a certain distance from the inner wall of the cyclone tube sleeve, no air inlet dead angle exists, and the dust is prevented from blocking at the dead angle. The conical part of the cyclone tube can also play a role in guiding when the cyclone tube sleeve is inserted, and the concentricity and perpendicularity requirements between the cyclone tube and the cyclone tube sleeve are ensured while the forming and assembly tolerances of plastic parts are counteracted, so that the tightness between components is improved, and the prefiltering efficiency is further improved.
Reinforcing ribs are arranged between the outer surfaces of the adjacent cyclone tube sleeves of the lower cover.
The reinforcing ribs are arranged between the adjacent cyclone tube sleeves, so that the integral strength of the parts is ensured, and the stability and reliability of the product are improved.
The upper surface of the upper cover is provided with a hole and is downwards extended with a hollow pipe, the upper end part of the cyclone pipe is inserted into the hollow pipe, the inner wall of the hollow pipe is provided with a convex back-off first, and the back-off first is in interference fit with the outer cylindrical surface of the cyclone pipe.
The outer wall of the cyclone tube is provided with a second back-off which is in interference fit with the inner wall of the hollow tube; the first back-off and the second back-off are arranged in a staggered manner to realize interlocking.
According to the invention, the inverted buckles are respectively arranged on the hollow pipe of the upper cover and the swirl tube and are respectively in interference fit with the matching surfaces, so that the tightness between the swirl tube and the upper cover is ensured, and the gas leakage is prevented; the two back-off buckles are mutually locked, so that each cyclone tube can be guaranteed to be installed in place, the cyclone tube is prevented from being separated from the hole of the hollow tube, and the cyclone tube is firmly installed.
The bottom surface of the hollow tube is a horizontal plane; the periphery of the cyclone tube is provided with a circle of limiting boss, the top surface of the limiting boss is a horizontal plane, and the limiting boss is matched with the bottom surface of the hollow tube to realize the limiting in the vertical direction.
The top surface of the limiting boss of the cyclone tube is matched with the bottom surface of the hollow tube, so that the vertical limiting is realized, and the cyclone tube is prevented from being installed and misplaced due to overpressure.
A sealing element mounting groove is formed between the inner edge and the outer edge of the outer periphery of the upper end of the lower cover of the prefiltering assembly, a flange is arranged on the outer periphery of the lower end of the upper cover and corresponds to the mounting groove, and the lower end face of the shell is contacted with the top face of the flange and the top face of the outer edge of the mounting groove; the special-shaped sealing rings are placed in the mounting grooves to realize sealing among the upper cover, the lower cover and the shell.
The upper end face of the second protruding part on the upper part of the special-shaped sealing ring is in pressing contact with the lower end face of the shell to realize sealing in the up-down direction; the inner peripheral surface of the first protruding part is in pressing contact with the outer peripheral wall surface below the flange of the upper cover to realize sealing in the horizontal direction.
According to the invention, the sealing between the three parts is realized by the special-shaped sealing rings, so that the tightness of the assembly is ensured, the structure is simplified, the sealing assembly is reduced, and the production cost is reduced. The upper end face of the second protruding part on the upper part of the special-shaped sealing ring is in compression contact with the lower end face of the shell to generate certain elastic deformation, so that the sealing in the up-down direction among the shell, the upper cover and the lower cover is realized. The special-shaped sealing ring is positioned in the sealing element installation position towards the protruding part I inside the filter, the inner peripheral surface of the protruding part I is in compression contact with the outer peripheral wall surface below the flange of the upper cover, and the inner peripheral surface of the protruding part I generates certain elastic deformation, so that the sealing in the horizontal direction among the shell, the upper cover and the lower cover is realized.
The beneficial effects of the invention are as follows:
the cyclone tube sleeve is integrated in the prefilter lower cover, and the lower cover and the cyclone tube sleeve are integrally formed by injection molding. After the integrated design is adopted, the assembling step is avoided between the cyclone tube sleeve and the lower cover, the installation gap between the components is avoided, the installation cost is saved, the problem of installation dislocation or neglected loading is prevented, the concentricity and perpendicularity requirements between the components are ensured, the tightness between the components is improved, and the prefiltering efficiency is further improved. The cyclone tube sleeve and the lower cover are integrated into a whole, each cyclone tube is independently inserted into the upper cover, and when the upper cover and the lower cover are buckled, each cyclone tube is required to be inserted into the cyclone tube sleeve corresponding to the cyclone tube sleeve. And the reinforcing ribs are arranged between the adjacent cyclone tube sleeves, so that the integral strength of the parts is ensured, and the stability and reliability of the product are improved.
The cyclone tube and the cyclone sheet are integrally formed by injection molding, so that the assembly steps are avoided, the installation gap between the parts is avoided, the installation cost is saved, the problems of installation dislocation or neglected loading are prevented, the concentricity and perpendicularity requirements between the parts are ensured, the tightness between the components is improved, and the prefiltering efficiency is further improved.
The lower end of the cyclone tube is a cone part which contracts downwards, after the cyclone tube is inserted into the cyclone tube sleeve below, the distance between the outer surface of the cone part of the cyclone tube and the inner wall of the cyclone tube sleeve is large, dirty air carrying dust is not easy to block in the cyclone tube sleeve, even if the cyclone tube is skewed in the cyclone tube sleeve due to assembly errors, the outer surface of the cone part of the cyclone tube is still kept at a certain distance from the inner wall of the cyclone tube sleeve, no air inlet dead angle exists, and the dust is prevented from blocking at the dead angle. The conical part of the cyclone tube can also play a role in guiding when the cyclone tube sleeve is inserted, and the concentricity and perpendicularity requirements between the cyclone tube and the cyclone tube sleeve are ensured while the forming and assembly tolerances of plastic parts are counteracted, so that the tightness between components is improved, and the prefiltering efficiency is further improved.
According to the invention, the inverted buckles are respectively arranged on the hollow pipe of the upper cover and the swirl tube and are respectively in interference fit with the matching surfaces, so that the tightness between the swirl tube and the upper cover is ensured, and the gas leakage is prevented; the two back-off buckles are mutually locked, so that each cyclone tube can be guaranteed to be installed in place, the cyclone tube is prevented from being separated from the hole of the hollow tube, and the cyclone tube is firmly installed. The top surface of the limiting boss of the cyclone tube is matched with the bottom surface of the hollow tube, so that the vertical limiting is realized, and the cyclone tube is prevented from being installed and misplaced due to overpressure.
According to the invention, the sealing between the three parts is realized by the special-shaped sealing rings, so that the tightness of the assembly is ensured, the structure is simplified, the sealing assembly is reduced, and the production cost is reduced. The upper end face of the second protruding part on the upper part of the special-shaped sealing ring is in compression contact with the lower end face of the shell to generate certain elastic deformation, so that the sealing in the up-down direction among the shell, the upper cover and the lower cover is realized. The special-shaped sealing ring is positioned in the sealing element installation position towards the protruding part I inside the filter, the inner peripheral surface of the protruding part I is in compression contact with the outer peripheral wall surface below the flange of the upper cover, and the inner peripheral surface of the protruding part I generates certain elastic deformation, so that the sealing in the horizontal direction among the shell, the upper cover and the lower cover is realized.
Drawings
Fig. 1 is a perspective cross-sectional view of a conventional desert air cleaner.
Fig. 2 is an enlarged view of the H portion in fig. 1.
Fig. 3 is a schematic view of a conventional cyclone tube inserted into a cyclone tube sleeve, wherein the cyclone tube is skewed within the cyclone tube sleeve.
Fig. 4 is a perspective view of an air cleaner employing the present invention.
Fig. 5 is an exploded view of fig. 4.
Fig. 6 is a cross-sectional view of fig. 4.
Fig. 7 is a cross-sectional view A-A of fig. 6.
Fig. 8 is an enlarged view of the portion B in fig. 6.
Fig. 9 is an enlarged view of a portion C in fig. 6.
Fig. 10 is an exploded view of the present invention.
Fig. 11 is a top view of the upper cover.
Fig. 12 is a cross-sectional view of F-F of fig. 11.
Fig. 13 is an enlarged view of a portion D in fig. 12.
Fig. 14 is a front view of the swirl tube.
Fig. 15 is an enlarged view of the portion E in fig. 14.
FIG. 16 is a schematic view of a cyclone tube inserted into a cyclone tube sleeve with the cyclone tube skewed within the cyclone tube sleeve.
Fig. 17 is a top view of the lower cover.
Fig. 18 is a cross-sectional view of G-G of fig. 17.
Figure 19 is a perspective view of the dust cup assembly.
Fig. 20 is a cross-sectional view of fig. 19.
Fig. 21 is a perspective view of the dust discharge valve.
In the figure: 1. a housing; 101. a convex ring; 2. a main filter element; 3. a prefilter assembly; 31. an upper cover; 3100. a horizontal dust collection surface; 3101. a boss; 310. a flat bottom surface; 311. a dust collection surface; 312. an outer peripheral wall surface; 313. a hollow tube; 314. a flange; 315. a first guiding and positioning part; 316. an inner wall; 317. reversely buckling; 319. a bottom surface; 32. swirl tube; 320. a boss; 321. swirl plates; 323. a limit boss; 324. a second step of back-off; 325. an outer wall; 33. a special-shaped sealing ring; 331. a first protruding part; 332. a second protruding part; 34. a lower cover; 341. a cyclone tube sleeve; 342. a mounting groove; 344. reinforcing ribs; 345. an inner edge; 346. an outer edge; 349. a second guiding and positioning part; 4. a first sealing element; 5. a dust collection cover assembly; 51. a cover body; 53. an ash discharging surface; 55. row of rowsA dust injection pipe; 56. a dust discharge valve; 57. dust-removing lip; 58. a long groove; 6. an outer end cap; 7. an air inlet; 8. an air outlet; 9. a second sealing element; 10. a safety filter element; 11. a cartridge cavity; 12. a dust collection chamber; 13. an air inlet cavity; 14. a dust discharging cavity; alpha (alpha) 1 、ɑ 2 : inclination angle.
Detailed Description
The following describes specific embodiments of the present invention with reference to the drawings.
As shown in fig. 4 and 5, the air filter adopting the invention sequentially comprises a shell 1, a prefilter assembly 3 and a dust collecting cover assembly 5 from top to bottom, wherein one side of the shell 1 is provided with an air outlet 8, the other side opposite to the shell 1 is fixedly provided with an outer end cover 6 through a buckle, and a sealing element II 9 is arranged between the shell 1 and the outer end cover 6; the shell 1 and the inner part of the outer end cover 6 are provided with a horizontal cylindrical main filter element 2, a concentric safety filter element 10 is arranged in the main filter element 2, and a filter element cavity 11 in the safety filter element 10 is communicated with the air outlet 8. The lower end of the shell 1 is fixed with the prefilter assembly 3 through a fastener, and a special-shaped sealing ring 33 is arranged between the prefilter assembly 3 and the shell 1; the prefilter assembly 3 is provided with an air inlet 7 on the same side as the outer end cap 6. The lower end of the prefilter assembly 3 is fixed with a dust collecting cover assembly 5 through a buckle, and a sealing piece I4 is arranged between the prefilter assembly and the dust collecting cover assembly.
As shown in fig. 6, the prefilter assembly 3 is located below the main filter element 2, and a cavity space between the prefilter assembly 3 and the outer surface of the main filter element 2 is a dust collecting cavity 12, and the dust collecting cavity 12 is communicated with an upper port of the cyclone tube 32. The upper cover 31 of the prefilter assembly 3 is arranged above the lower cover 34 through a special-shaped sealing ring 33, a hole is formed in the upper surface of the upper cover 31, a hollow pipe 313 extends downwards, the upper end parts of the cyclone pipes 32 are inserted into the hollow pipe 313, and a plurality of cyclone pipes 32 which are arranged in an array manner are arranged in a step manner, so that the cross section of the prefilter assembly 3 is approximately V-shaped; the cavity space among the outer wall of the swirl tube 32, the upper cover 31 and the lower cover 34 is an air inlet cavity 13, and the air inlet cavity 13 is communicated with the air inlet 7. As shown in fig. 10 and 11, a vertical hollow pipe 313 is provided in the upper cover 31 corresponding to each cyclone pipe 32, a vertical cyclone pipe sleeve 341 is integrated in the lower cover 34 corresponding to the cyclone pipe 32, a cyclone sheet 321 is provided at the lower periphery of the cyclone pipe 32, the cyclone sheet 321 can be integrated on the cyclone pipe 32, the cyclone sheet 321 can be manufactured independently, and is sleeved at the periphery of the cyclone pipe 32 in an assembling manner; the cyclone tube 32 comprises a cyclone plate 321 at the lower part thereof in the cyclone tube sleeve 341, the cyclone plate 321 is positioned at the mouth of the cyclone tube sleeve 341, and the outline dimension of the outermost peripheral envelope line of the cyclone plate 321 is matched with the inner diameter of the cyclone tube sleeve 341 so as to ensure the coaxiality requirement of the outer wall of the cyclone tube 32 and the inner wall of the cyclone tube sleeve 341. In this embodiment, the cyclone tube sleeves 341 and the lower cover 34 are integrally injection molded, and each cyclone tube 32 and the cyclone sheet 321 at the periphery of the cyclone tube sleeve are integrally injection molded, so that the installation step of the cyclone tube sleeve 341 is avoided, the installation gap is eliminated, the installation cost is saved, the problem of installation dislocation or neglected installation of the cyclone sheet 321 can be prevented, the concentricity and verticality requirements among all the components are ensured, the tightness among the components is improved, and the prefiltering efficiency is further improved. As shown in fig. 12, a first guiding and positioning part 315 is provided at the central part of the upper cover 31 in a protruding manner, as shown in fig. 18, and a second guiding and positioning part 349 is provided at the central part of the lower cover 34 in a protruding manner, as shown in fig. 7, so that the upper cover 31 and the lower cover 34 are mutually matched with each other and fixed by a fastener through the first guiding and positioning part 315 and the second guiding and positioning part 349.
As shown in fig. 6, the upper surface of the upper cover 31 is formed into an inverted trapezoid with two high sides and a low middle part by two dust collecting surfaces 311 and a flat bottom surface 310. In other embodiments, the upper surface of the upper cover 31 may be formed by two dust collecting surfaces 311 into a V shape with two high sides and a low middle; the upper surface of the upper cover 31 may be a concave arc surface with two high sides and a low middle. As shown in fig. 12, the dust collection surface 311 is a sloping plane having an inclination angle, and the inclination angle of the dust collection surface 311 is a 1 Inclination angle alpha 1 5 to 60 degrees, preferably 45 degrees. In other embodiments, the dust collecting surface 311 may be a multi-step stepped surface with both sides higher than the middle, and each stepped surface has an inclination angle of 5 to 60 degrees, preferably 45 degrees. The dust collection surface 311 may be a downward curved surface, and the inclination angle of the tangential plane at any point on the curved surface may be 0 to 90 degrees. The dust collecting surface 311 may be any two or a combination of inclined plane, curved surface and stepped surface. The two dust collection surfaces 311 may be either the same as described above or different surfaces. When the dust collecting surface 311 of the upper cover 31 is a bevel plane, a stepped surface or a downward curved surfaceDuring the process, pollutants such as dust, sand and the like falling on the dust collecting surface 311 slide down under the action of gravity and are timely discharged from the cyclone tube 32, so that the deposition of the pollutants on the dust collecting surface 311 is avoided, the influence of the pollutants on the filter element is avoided, the maintenance period of the filter element is prolonged, and the maintenance cost is reduced. As shown in fig. 6, the distance between the inverted trapezoid upper surface of the upper cover 31 and the main filter element 2 is reduced, and the vertical distance between each point on the upper surface of the upper cover 31 and the outer surface of the main filter element 2 is similar, so that the gas flow field is uniformly distributed between the dust collecting surface 311 and the main filter element 2, the air flow filtered by the surface of the filter element is uniform, each part of the main filter element 2 is fully utilized, and the utilization rate of the filter element is improved.
As shown in fig. 12 and 13, the inner hole of the hollow tube 313 is formed by an inner wall 316 and an inwardly protruding round of a reverse buckle 317 in sequence from top to bottom, and the bottom surface 319 of the hollow tube 313 is a horizontal surface. As shown in fig. 14, the cyclone tube 32 has a cylindrical upper portion and a conical lower portion, and after the cyclone tube 32 is inserted into the cyclone tube sleeve 341 below, the distance between the outer surface of the conical portion of the cyclone tube 32 and the inner wall of the cyclone tube sleeve 341 is large, and dirty air carrying dust is not easy to be blocked, as shown in fig. 16, even if the cyclone tube 32 is skewed in the cyclone tube sleeve 341 due to assembly errors, the outer surface of the conical portion of the cyclone tube 32 is still kept at a certain distance from the inner wall of the cyclone tube sleeve 341, no air inlet dead angle occurs, and the dust is prevented from being blocked at the dead angle. As shown in fig. 14 and 15, a circle of back-off second 324 is outwards protruded from an outer wall 325 at the upper end of the cylindrical part of the cyclone tube 32, a circle of limit boss 323 is convexly arranged on the periphery of the cyclone tube 32 below the back-off second 324, and the top surface of the limit boss 323 is a horizontal surface; the cyclone sheet 321 is integrated on the outer wall of the lower end of the cylindrical part of the cyclone tube 32, and the conical part of the cyclone tube 32 is positioned below the cyclone sheet 321. As shown in fig. 14, the cyclone sheet 321 is a curved cyclone sheet, and the included angle between the tangential plane of the curved surface of the cyclone sheet 321 and the horizontal line is 15-60 degrees, so that the best cyclone effect is obtained under the condition of not increasing the air inlet resistance; the small diameter end of the conical part is 0.5-5 mm smaller than the large diameter end, so that the conical part can play a guiding role when being inserted into the cyclone tube sleeve 341, and the concentricity and perpendicularity requirements between the cyclone tube 32 and the cyclone tube sleeve 341 can be ensured while the forming and assembling tolerances of plastic parts are counteracted, the tightness between components is improved, and the prefiltering efficiency is further improved.
As shown in fig. 9, the first back-off 317 of the hollow pipe 313 is staggered with the second back-off 324 of the cyclone pipe 32 in height, after the upper end of the cyclone pipe 32 is inserted into the hollow pipe 313 of the upper cover 31, the second back-off 324 of the cyclone pipe 32 is in interference fit with the inner wall 316 of the hollow pipe 313, and the first back-off 317 of the hollow pipe 313 is in interference fit with the outer cylindrical surface of the cylindrical part of the cyclone pipe 32, so that the tightness between the cyclone pipe 32 and the upper cover 31 is ensured, and gas leakage is prevented; the first back-off 317 and the second back-off 324 are interlocked, so that each cyclone tube 32 can be ensured to be installed in place, and the cyclone tube 32 is prevented from falling out of the hole of the hollow tube 313, so that the cyclone tube 32 is more firmly installed; the outer wall 325 of swirl tube 32 mates with the inner wall 316 of hollow tube 313; the top surface of the limit boss 323 of the swirl tube 32 is matched with the bottom surface 319 of the hollow tube 313, so that the limit in the vertical direction is realized, and the swirl tube 32 is prevented from being installed in dislocation due to overpressure.
As shown in fig. 6 and 8, the upper end outer peripheral flange of the lower cover 34 is provided with a mounting groove 342, the height of the mounting groove 342 near the inner edge 345 inside the filter is lower, and the height of the outer edge 346 is higher; a flange 314 is outwardly protruded at the outer circumference of the lower end of the upper cover 31 corresponding to the position of the mounting groove 342, and the lower end surface of the housing 1 is in contact with the flange 314 of the upper cover 31 and the outer edge 346 of the mounting groove 342. The special-shaped sealing ring 33 is placed in the mounting groove 342, the special-shaped sealing ring 33 has a special-shaped cross section, the upper part of the special-shaped sealing ring 33 is provided with a second protruding part 332 protruding upwards, and a first protruding part 331 protruding inwards is arranged towards the inside of the filter; the upper end face of the second protruding part 332 is in pressing contact with the lower end face of the shell 1, a circle of protruding rings 101 are downwards protruding on the lower end face of the shell 1, and the protruding rings 101 further press the upper end face of the second protruding part 332; the upper end surface of the second protruding part 332 generates certain elastic deformation, so that the sealing among the shell 1, the upper cover 31 and the lower cover 34 in the up-down direction is realized; the inner peripheral surface of the first boss 331 is in pressing contact with the outer peripheral wall surface 312 below the flange 314 of the upper cover 31, and the inner peripheral surface of the first boss 331 is elastically deformed to a certain extent, so that the horizontal sealing among the casing 1, the upper cover 31 and the lower cover 34 is realized. The air filter of the invention simultaneously realizes the sealing of each surface among the upper cover 31, the lower cover 34 and the shell 1 by one special-shaped sealing ring 33, simplifies the structure, reduces the sealing assembly, reduces the production cost, ensures the tightness of the assembly and improves the prefilter efficiency.
As shown in fig. 6, 17 and 18, the outer surfaces of the adjacent cyclone tube sleeves 341 of the lower cover 34 are connected and reinforced by the reinforcing ribs 344, the reinforcing ribs 344 ensure the integral strength of the lower cover 34 and the cyclone tube sleeves 341, and the stability and reliability of the product are improved. The top surface of the lower cover 34 has a cross section with high sides and low middle, which basically corresponds to the undulating shape of the upper cover 31, and the top surface of the lower cover 34 may be an inclined plane with an inclination angle of 5-60 degrees, preferably 45 degrees; the inclination angle of the tangent plane at any point on the curved surface is 0-90 degrees; the top surfaces of the left and right sides of the lower cover 34 may be either one of the surfaces described above, or may be a combination of two different surfaces. The shape of the lower cover 34 is contoured in accordance with the geometry of the upper cover 31, so that the space size of the prefilter assembly 3 can be reduced, thereby reducing the overall space size of the air cleaner and saving the cost of raw materials. As shown in fig. 6, because the cyclone tube sleeve 341 is arranged at a height matching with the cyclone tube 32, the bottom of the lower cover 34 is also a stepped surface, the cross section of the cover body 51 of the dust collecting cover assembly 5 is in an inverted trapezoid shape, and the shape of the bottom of the lower cover 34 is matched with the shape of the cover body 51, so that on one hand, the path from falling of pollutants such as dust from the cyclone tube sleeve 341 to discharging from the dust discharging valve 56 is short, the filtering efficiency is improved, and on the other hand, the lower cover 34 is just positioned in the cover body 51, the structure is compact, and the volume of the whole product is reduced. The cavity space between the lower cover 34 and the cover body 51 is the dust discharging cavity 14, and the dust discharging cavity 14 is communicated with the lower port of the cyclone tube 32 through the cyclone tube sleeve 341.
As shown in fig. 19 and 20, a dust exhaust injection pipe 55 is arranged at the inner bottom of the cover body 51 of the dust collecting cover assembly 5, and one end of the dust exhaust injection pipe 55 positioned outside the cover body 51 can be externally connected with injection airflow for efficient discharge of dust; the cover 51 is fixed with a strip dust discharging valve 56 outside the dust discharging injection pipe 55, the dust discharging valve 56 and the cover 51 can also be integrated into one piece, oneThe body forming structure can save the installation cost, reduce the assembly work, avoid the installation clearance between the parts, improve the tightness, and then guarantee the prefiltering efficiency in the system. As shown in fig. 20, the cover 51 has a symmetrical ash discharge surface 53 on the inner surface, the ash discharge surface 53 is an inclined plane having an inclination angle a, and the inclination angle a of the ash discharge surface 53 2 Inclination angle alpha 2 5 to 60 degrees, preferably 45 degrees. In other embodiments, the ash discharging surface 53 may be a multi-step surface, a downward curved surface or a composite surface formed by any combination of a bevel surface, a step surface and a curved surface, and the inclination angle of the tangential plane at any point on the curved surface is 0-90 degrees; the two ash discharge surfaces 53 may be either one of the surfaces described above or a combination of two different surfaces. The ash discharging surface 53 of the dust collecting cover is set to be an inclined plane, a stepped surface and a downward curved surface, has a larger inclination angle, and pollutants such as dust, sand and the like falling on the ash discharging surface 53 timely slide down and are timely discharged under the action of gravity, so that the deposition of the pollutants is avoided.
As shown in fig. 20 and 21, an oblong long groove 58 is formed in the dust exhaust valve 56, the cross section of the long groove 58 is triangular, and in other embodiments, the cross section of the long groove 58 may be U-shaped or arc-shaped; the bottom of the long groove 58 is provided with two vertically parallel long dust-discharging lips 57, and the dust-discharging lips 57 are made of rubber and thermoplastic elastomer flexible materials; a certain gap is arranged between the two dust-discharging lips 57, the gap value is about 0.5 mm-2 mm, and when negative pressure exists in the air filter, the two dust-discharging lips 57 can be tightly closed under the action of the negative pressure to realize the sealing of an internal system. The upper port of the long groove 58 is track-shaped, the length dimension is 1.5-50 times of the width dimension, the flow area of the upper port of the long groove 58 is large, the dust holding capacity is large, the dust flowing in unit time is large, and the dust discharging capacity is improved. The length of the dust exhausting lip 57 is longer than the length of the opening of the long groove 58, and the two outer ends of the dust exhausting lip 57 extend outwards for a certain length along the length direction of the long groove 58 so as to ensure that the dust exhausting lip 57 seals the two end parts of the long groove 58, the length of the dust exhausting lip 57 is longer, the opening of the dust exhausting lip 57 is larger when the dust exhausting lip 57 is opened, and the dust exhausting capacity is improved; the height of the dust exhausting lip 57 is 5 mm-50 mm, the thickness of the two lips of the dust exhausting lip 57 is 0.5 mm-5 mm, the height of the dust exhausting lip 57 is larger, the thickness is relatively thinner, the dust exhausting lip 57 can be tightly closed, and the stability and reliability of the internal system sealing are improved.
When the air filter of the invention is in operation, the air inlet 7 is connected with a high-level air-entraining pipeline or other pipelines, the air outlet 8 is connected with an engine air inlet pipeline, and when the engine is in normal operation, the inside of the air filter is in a negative pressure state, and the dust-discharging lip 57 at the lower end of the dust-discharging valve 56 is attached, so that the inside of a filtering system of the air filter is in a closed state. As shown in fig. 4, 5, 6 and 7, external polluted air containing various dust pollutants with different particle sizes is introduced into an air inlet 7 of an air filter through an air entraining pipeline, enters the pre-filtering assembly 3 from the air inlet 7, firstly enters an air inlet cavity 13 between the outer wall of each cyclone tube 32, an upper cover 31 and a lower cover 34, under the action of internal negative pressure, air fluid downwards enters a cyclone tube sleeve 341 and passes through the area of a cyclone plate 321, cyclone is generated by high-speed rotation under the guide action of the cyclone plate 321, dust pollutants with larger particle sizes and heavier weight in the air fluid are concentrated to the inner circumferential surface of the cyclone tube sleeve 341 under the action of centrifugal force, and as the boundary fluid flow velocity of the wall surface of the inner circumferential surface approaches zero, the dust pollutants with larger particle sizes and heavier weight, which are close to the wall surface, are separated and slide down under the action of gravity. The prefilter assembly 3 separates the dust pollutants with larger particle size and heavier mass to obtain cleaner prefilter air fluid, the prefilter air fluid is turned upwards from the bottom opening of the cyclone tube 32 to enter the cyclone tube 32, flows out of the upper opening of the cyclone tube 32 into the dust collection cavity 12 to reach the outer surface of the main filter element 2, then passes through the main filter element 2 and the safety filter element 10 to enter the filter element cavity 11, the dust pollutants with smaller particle size and lighter weight are further filtered by the main filter element 2, and finally clean air meeting the requirements of engine cleanliness is obtained, and the clean air passes through the safety filter element 10 and then enters an engine air inlet pipeline through the air outlet 8.
The dust and contaminant with larger particle diameter and heavier mass separated and sliding in the cyclone tube sleeve 341 is discharged into the dust discharging cavity 14 from the lower part of the cyclone tube sleeve 341 and falls onto the dust discharging surface 53 of the dust collecting cover assembly 5, and the dust and contaminant falling onto the dust discharging surface 53 slides into the dust discharging valve 56 under the action of gravity because the dust discharging surface 53 is an inclined surface. When the dust contaminant in the dust discharge valve 56 is deposited to a certain amount, the dust discharge lip 57 is opened by the gravity of the dust contaminant, and discharged from the opening of the dust discharge lip 57. The dust exhaust injection pipe 55 is connected with the injection fan, when the deposition amount of dust in the dust exhaust valve 56 reaches a certain amount and is not discharged, the injection fan can be started to discharge the dust, and when the injection fan does not work, the pressure of the dust exhaust injection pipe 55 is equal to the pressure in the dust collecting cover assembly 5.
The air filter adopting the invention is also suitable for a back-flushing system, when the air filter is applied to the back-flushing system, the air outlet 8 is connected with a three-way pipeline, one interface of the three-way pipeline is connected with an air inlet pipeline of the engine, and the other interface is connected with the back-flushing system. When the back-blowing system operates, clean compressed air is blown into a filter element cavity 11 in the safety filter element 10 from an air outlet 8, and passes through the safety filter element 10 and the main filter element 2 to strip dust pollutants deposited on the outer surface of the main filter element 2 to a dust collection cavity 12; the dust and pollutant in the dust collecting cavity 12 flows out of the cyclone tube 32 into the dust discharging cavity 14 of the dust discharging valve 56 along with the compressed air fluid under the combined action of gravity and the compressed air fluid, and the other part falls on the dust collecting surface 311 of the upper cover 31 of the pre-filtering assembly 3, and the dust and pollutant descends along the inclined surface and gathers into the cyclone tube 32 under the action of gravity due to the inclined angle of the dust collecting surface 311, and flows out of the cyclone tube 32 into the dust discharging cavity 14 of the dust discharging valve 56. Under the pressure of the compressed air, the dust-discharging lip 57 of the dust-discharging valve 56 is opened, and most of dust pollutants in the dust-discharging cavity 14 of the dust-discharging valve 56 are directly discharged from the dust-discharging lip 57; a portion of the dust contaminants within the dust discharge chamber 14 fall onto the dust discharge surface 53 and under the force of gravity slide along the dust discharge surface and are discharged from the dust discharge lip 57.
The dust collecting surface 311 of the upper cover 31 of the pre-filtering assembly 3 and the ash discharging surface 53 of the cover body 51 of the dust collecting cover assembly 5 are inclined planes with inclined angles, stepped inclined planes or downward curved surfaces, and pollutants such as dust, sand and the like falling on the dust collecting surface can slide into the cyclone tube 32 under the action of gravity and then enter the dust collecting cover assembly 5 to be discharged from the dust discharging valve 56 in time. The pollutants are discharged in time, so that the deposition of the pollutants is avoided, the maintenance period of the air filter is prolonged, and the maintenance cost is reduced.
The above description is illustrative of the invention and is not intended to be limiting, and the invention may be modified in any form without departing from the spirit of the invention. For example, a small cone-shaped dust collecting surface is further provided on the upper end portion of the hollow pipe 313 on the dust collecting surface 311, so that dust more easily slides into the cyclone pipe 32. The upper surface of the upper cover 31, the top surface of the lower cover 34, or both sides of the dust discharging surface 53 of the cover body 51 may be arranged in an axisymmetric manner or may be arranged in an asymmetric manner with respect to the longitudinal center axis of the filter element.
Claims (7)
1. A prefilter assembly for an air cleaner, comprising: a plurality of cyclone tubes (32) of the prefilter assembly (3) are arranged in the upper cover (31), and each cyclone tube (32) is independently arranged; a plurality of cyclone tube sleeves (341) are integrally integrated on the lower cover (34), and cyclone sheets (321) at the periphery of the lower part of each cyclone tube (32) are inserted into the cyclone tube sleeves (341) and positioned at the opening parts of the sleeves; the bottom surface (319) of the hollow pipe (313) is a horizontal surface; a circle of limiting boss (323) is arranged on the periphery of the cyclone tube (32), the top surface of the limiting boss (323) is a horizontal surface, and the limiting boss is matched with the bottom surface (319) of the hollow tube (313) to realize limiting in the vertical direction; a sealing element mounting groove (342) is formed between an inner edge (345) and an outer edge (346) of the outer periphery of the upper end of the lower cover (34) of the prefiltering assembly (3), a flange (314) is arranged on the outer periphery of the lower end of the upper cover (31) and corresponds to the mounting groove (342), and the lower end face of the shell (1) is in contact with the top face of the flange (314) and the top face of the outer edge (346) of the mounting groove (342); the special-shaped sealing rings (33) are placed in the mounting grooves (342) to realize sealing among the upper cover (31), the lower cover (34) and the shell (1); the upper end surface of a second bulge part (332) at the upper part of the special-shaped sealing ring (33) is in pressing contact with the lower end surface of the shell (1) to realize sealing in the up-down direction; the inner peripheral surface of the first boss 331 is in pressing contact with the outer peripheral wall surface 312 below the flange 314 of the upper cover 31 to realize sealing in the horizontal direction.
2. The air cleaner prefilter assembly of claim 1, wherein: the cyclone sheet (321) is integrally integrated on the cyclone tube (32).
3. The air cleaner prefilter assembly of claim 1, wherein: the outermost peripheral envelope contour dimension of the cyclone sheet (321) is matched with the inner diameter of the cyclone tube sleeve (341).
4. The air cleaner prefilter assembly of claim 1, wherein: the upper part of the cyclone tube (32) is a cylindrical part, the lower part is a conical part, and the small diameter end of the conical part is 0.5-5 mm smaller than the large diameter end.
5. The air cleaner prefilter assembly of claim 1, wherein: reinforcing ribs (344) are arranged between the outer surfaces of the adjacent cyclone tube sleeves (341) of the lower cover (34).
6. The air cleaner prefilter assembly of claim 1, wherein: the upper surface of upper cover (31) is seted up porosely and downwardly extending has hollow tube (313), and the upper end of swirl tube (32) inserts in hollow tube (313), is equipped with protruding back-off one (317) at inner wall (316) of hollow tube (313), back-off one (317) and the outer cylinder interference fit of swirl tube (32).
7. The air cleaner prefilter assembly of claim 6, wherein: the outer wall (325) of the cyclone tube (32) is provided with a second back-off buckle (324), and the second back-off buckle (324) is in interference fit with the inner wall (316) of the hollow tube (313); the first back-off (317) and the second back-off (324) are arranged in a staggered mode to realize interlocking.
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| CN201910448890.5A CN110056456B (en) | 2019-05-28 | 2019-05-28 | Prefilter assembly of air cleaner |
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| CN201910448890.5A CN110056456B (en) | 2019-05-28 | 2019-05-28 | Prefilter assembly of air cleaner |
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| CN110056456B true CN110056456B (en) | 2024-04-09 |
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| CN208330577U (en) * | 2018-05-04 | 2019-01-04 | 中国第一汽车股份有限公司 | A kind of air cleaner of double cyclone structure |
| CN109184968A (en) * | 2018-10-11 | 2019-01-11 | 上海弗列加滤清器有限公司 | A kind of air cleaner assy |
| CN209800128U (en) * | 2019-05-28 | 2019-12-17 | 无锡亿利环保科技有限公司 | Pre-filtering assembly of air filter |
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| US3048959A (en) * | 1959-10-27 | 1962-08-14 | Novo Ind Corp | Air cleaning device and method |
| JP2003138993A (en) * | 2001-10-29 | 2003-05-14 | Wako Industrial Co Ltd | Cyclone air cleaner |
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| CN110056456A (en) | 2019-07-26 |
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