CN110005553B - Conical dust collecting surface structure of air filter - Google Patents
Conical dust collecting surface structure of air filter Download PDFInfo
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- CN110005553B CN110005553B CN201910448980.4A CN201910448980A CN110005553B CN 110005553 B CN110005553 B CN 110005553B CN 201910448980 A CN201910448980 A CN 201910448980A CN 110005553 B CN110005553 B CN 110005553B
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- dust collecting
- cyclone
- tube
- dust
- collecting surface
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- 239000000428 dust Substances 0.000 title claims abstract description 165
- 230000003014 reinforcing effect Effects 0.000 claims description 6
- 239000003344 environmental pollutant Substances 0.000 abstract description 35
- 231100000719 pollutant Toxicity 0.000 abstract description 35
- 239000004576 sand Substances 0.000 abstract description 17
- 230000005484 gravity Effects 0.000 abstract description 14
- 238000011045 prefiltration Methods 0.000 description 29
- 238000007599 discharging Methods 0.000 description 22
- 238000009434 installation Methods 0.000 description 20
- 239000000306 component Substances 0.000 description 17
- 238000002347 injection Methods 0.000 description 12
- 239000007924 injection Substances 0.000 description 12
- 239000002245 particle Substances 0.000 description 11
- 239000000356 contaminant Substances 0.000 description 9
- 238000012423 maintenance Methods 0.000 description 9
- 238000001914 filtration Methods 0.000 description 7
- 239000012530 fluid Substances 0.000 description 6
- 230000008021 deposition Effects 0.000 description 5
- 238000007789 sealing Methods 0.000 description 5
- 238000011010 flushing procedure Methods 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 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
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 229920002725 thermoplastic elastomer Polymers 0.000 description 1
Classifications
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- 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
- F02M35/0226—Air cleaners acting by gravity, by centrifugal, or by other inertial forces, e.g. with moistened walls by gravity or by mass inertia, e.g. labyrinths, deflectors
-
- 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
- F02M35/08—Air cleaners with means for removing dust, particles or liquids from cleaners; with means for indicating clogging; with by-pass means; Regeneration of cleaners
- F02M35/084—Dust collection chambers or discharge sockets, e.g. chambers fed by gravity or closed by a valve
-
- 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
- F02M35/08—Air cleaners with means for removing dust, particles or liquids from cleaners; with means for indicating clogging; with by-pass means; Regeneration of cleaners
- F02M35/086—Dust removal by flushing, blasting, pulsating or aspirating flow, washing or the like; Mechanical dust removal, e.g. by using scrapers
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Cyclones (AREA)
Abstract
The invention discloses a conical dust collecting surface structure of an air filter, a cyclone tube is arranged in a hollow tube of an upper cover, the upper end part of the hollow tube is provided with a conical dust collecting surface, and the conical dust collecting surface is positioned above the cyclone tube. According to the invention, the hollow pipes are arranged on the same horizontal plane of the upper cover and correspond to the cyclone pipes, the upper end part of each hollow pipe is provided with the small-sized conical dust collecting surface, the conical dust collecting surface is of a conical dust collecting surface structure or a pyramid dust collecting surface structure, and pollutants such as dust, sand and the like slide down from the conical dust collecting surface to enter the cyclone pipes to be discharged under the action of gravity, so that the pollutants are not deposited on the upper surface of the upper cover, and the influence of the pollutants on the filter element is avoided.
Description
Technical Field
The invention relates to the field of air filters of air inlet systems of engines, in particular to a conical dust collecting surface structure 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.
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, a plurality of swirl tubes 32 which are arranged in an array are arranged on an upper cover 31 of the prefilter assembly 3, the lower ends of the swirl tubes 32 extend into swirl tube sleeves 341, and the lower ends of the swirl tube sleeves 341 are sleeved on corresponding holes of a lower cover 34. The upper surface of the upper cover 31 is a horizontal dust collection surface 3100, and contaminants such as dust and sand falling on the horizontal dust collection surface 3100 cannot be sufficiently transferred into the cyclone tube 32 and discharged from the dust discharge valve 56 at the bottom. Along with the accumulation of working time, the deposited pollutants on the horizontal dust collection surface 3100 are continuously increased, and can be adsorbed on the outer surface of the main filter element 2 which is nearer under the action of negative pressure, so that the service life of the filter element is influenced, the maintenance period of the air filter is shortened, and the maintenance cost of the air filter is increased.
The cyclone tube 32, cyclone sheet 321 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, the cyclone sheet 321 is small in size and large in number, the cyclone sheet 321 is assembled on the cyclone tube 32, a large amount of labor is required to be consumed, the installation dislocation and even the neglected loading are easy to occur, the prefilter efficiency of the prefilter assembly 3 is further affected, the production and assembly costs are high, each part is different, 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. 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 conical dust collecting surface structure of the air filter aiming at the defects that the horizontal dust collecting surface inside the existing desert air filter cannot timely discharge ash, so that the maintenance period of a filter element is short and the like, and the conical dust collecting surface is arranged above a cyclone tube, so that the timely ash discharge is facilitated, and the maintenance period of the air filter is prolonged.
The technical scheme adopted by the invention is as follows:
a cone-shaped dust collecting surface structure of an air filter is characterized in that a cyclone tube is arranged in a hollow tube of an upper cover, a cone-shaped dust collecting surface is arranged at the upper end part of the hollow tube, and the cone-shaped dust collecting surface is positioned above the cyclone tube.
As a further improvement of the above technical scheme:
the conical dust collecting surface is a conical dust collecting surface or a pyramid dust collecting surface.
According to the invention, the hollow pipes are arranged on the same horizontal plane of the upper cover and correspond to the cyclone pipes, the upper end part of each hollow pipe is provided with the small-sized conical dust collecting surface, the conical dust collecting surface is of a conical dust collecting surface structure or a pyramid dust collecting surface structure, and pollutants such as dust, sand and the like slide down from the conical dust collecting surface to enter the cyclone pipes to be discharged under the action of gravity, so that the pollutants are not deposited on the upper surface of the upper cover, and the influence of the pollutants on the filter element is avoided.
The top ends of the adjacent conical dust collecting surfaces are connected through V-shaped zigzag edges.
The top ends of the adjacent conical dust collecting surfaces are connected to form a horizontal edge.
The tops of adjacent pyramid-shaped dust collecting surfaces are connected to form V-shaped zigzag edges, the zigzag edges have slopes, dust, sand and other pollutants falling on the zigzag edges slide under the action of gravity, and the dust collecting area is only the top point of the pyramid-shaped dust collecting surface, so that the pollutants are prevented from being deposited on the upper end part of the hollow pipe. The top ends of adjacent conical dust collecting surfaces are connected to form horizontal edges, the area of the edges capable of collecting dust is small, and pollutants such as dust, sand and the like are not easy to deposit on the upper end part of the hollow pipe in a large quantity.
The cyclone tube comprises a cyclone tube sleeve, wherein the cyclone tube sleeve is integrated on the lower cover, the cyclone tube sleeve and the lower cover are integrally formed, and reinforcing ribs are arranged between the outer surfaces of adjacent cyclone tube sleeves.
The periphery of the cyclone tube is integrated with a cyclone sheet, and the cyclone tube and the cyclone sheet are integrally formed.
The cyclone tube sleeve of the air filter is integrated in the prefilter lower cover, and the lower cover and the cyclone tube sleeve are integrally formed. 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 integrally designed and then are of integral structural rigidity, and the cyclone tube is independently designed, so that flexibility of the cyclone tube assembled into the cyclone tube sleeve is guaranteed, and overlimit during assembly is avoided. 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, so that the assembly step is avoided, the installation gap between the components is avoided, the installation cost is saved, the problems of installation dislocation or neglected loading are 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 inner wall of the hollow pipe is provided with a convex back-off first, and after the cyclone pipe is inserted into the hollow pipe, 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 after the cyclone tube is inserted into the hollow tube; the first back-off and the second back-off are arranged in a staggered manner to realize interlocking.
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 air filter is characterized in that the hollow pipe of the upper cover and the cyclone tube are respectively provided with the back-off, and the two back-off are respectively in interference fit with the matching surface, so that the tightness between the cyclone 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.
The beneficial effects of the invention are as follows:
according to the invention, the hollow pipes are arranged on the same horizontal plane of the upper cover and correspond to the cyclone pipes, the upper end part of each hollow pipe is provided with the small-sized conical dust collecting surface, the conical dust collecting surface is of a conical dust collecting surface structure or a pyramid dust collecting surface structure, and pollutants such as dust, sand and the like slide down from the conical dust collecting surface to enter the cyclone pipes to be discharged under the action of gravity, so that the pollutants are not deposited on the upper surface of the upper cover, and the influence of the pollutants on the filter element is avoided.
The tops of adjacent pyramid-shaped dust collecting surfaces are connected to form V-shaped zigzag edges, the zigzag edges have slopes, dust, sand and other pollutants falling on the zigzag edges slide under the action of gravity, and the dust collecting area is only the top point of the pyramid-shaped dust collecting surface, so that the pollutants are prevented from being deposited on the upper end part of the hollow pipe. The top ends of adjacent conical dust collecting surfaces are connected to form horizontal edges, the area of the edges capable of collecting dust is small, and pollutants such as dust, sand and the like are not easy to deposit on the upper end part of the hollow pipe in a large quantity.
The cyclone tube sleeve of the air filter is integrated in the prefilter lower cover, and the lower cover and the cyclone tube sleeve are integrally formed. 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 integrally designed and then are of integral structural rigidity, and the cyclone tube is independently designed, so that flexibility of the cyclone tube assembled into the cyclone tube sleeve is guaranteed, and overlimit during assembly is avoided. 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, so that the assembly step is avoided, the installation gap between the components is avoided, the installation cost is saved, the problems of installation dislocation or neglected loading are 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 air filter is characterized in that the hollow pipe of the upper cover and the cyclone tube are respectively provided with the back-off, and the two back-off are respectively in interference fit with the matching surface, so that the tightness between the cyclone 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.
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 perspective view of an air cleaner employing the present invention.
Fig. 4 is a perspective view of an upper cover provided with a conical dust collecting surface.
Fig. 5 is a cross-sectional view of fig. 4.
Fig. 6 is a perspective view of an upper cover provided with a pyramid-shaped dust collection surface.
Fig. 7 is a cross-sectional view of fig. 6.
Fig. 8 is an enlarged view of a portion a in fig. 5.
Fig. 9 is a front view of the cyclone tube.
Fig. 10 is an enlarged view of a portion B in fig. 9.
Fig. 11 is a perspective view of the dust cup assembly.
Fig. 12 is a cross-sectional view of fig. 11.
Fig. 13 is a perspective view of the dust discharge valve.
In the figure: 1. a housing; 2. a main filter element; 3. a prefilter assembly; 31. an upper cover; 3100. a horizontal dust collection surface; 3101. a boss; 313. a hollow tube; 3131. a conical dust collection surface; 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; 34. a lower cover; 341. a cyclone tube sleeve; 5. a dust collection cover assembly; 51. a cover body; 53. an ash discharging surface; 55. a dust-discharging 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; alpha (alpha) 2 And (3) gamma: inclination angle.
Detailed Description
The following describes specific embodiments of the present invention with reference to the drawings.
As shown in fig. 3, 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 is arranged between the shell 1 and the outer end cover 6; the inside of shell 1 and outer end cover 6 is equipped with main filter core 2, and main filter core 2 inside is equipped with concentric safe filter core, and the inside filter core chamber and the gas outlet 8 intercommunication of safe filter core. The lower end of the shell 1 is fixed with the prefilter assembly 3 through a fastener, and a sealing ring 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 the dust collecting cover assembly 5 through a buckle, and a sealing element is arranged between the prefilter assembly and the dust collecting cover assembly.
As shown in fig. 4 to 7, the upper end surface of the upper cover 31 of the prefilter assembly 3 is a horizontal plane, a plurality of swirl tubes 32 are arrayed in the upper cover 31, a hole is formed in the upper end surface of the upper cover 31 and a plurality of hollow tubes 313 extend downwards, a small-sized conical dust collecting surface 3131 is arranged at the upper end part of each hollow tube 313, and the swirl tubes 32 are located below the conical dust collecting surface 3131. As shown in fig. 4 and 5, the conical dust collecting surface 3131 has a conical dust collecting surface structure, and the included angle γ between the bus and the central axis of the cyclone tube 32 is 5 to 85 degrees, preferably 30 degrees. As shown in fig. 6 and 7, the cone-shaped dust collecting surface 3131 may be a pyramid-shaped dust collecting surface structure, and the pyramid may be a triangular pyramid, a rectangular pyramid, a pentagonal pyramid, a hexagonal pyramid, or the like, or may be a plurality of pyramids according to actual needs, and the included angle γ between the pyramid surface and the central axis of the cyclone tube 32 is 5-85 degrees, preferably 30 degrees. The top ends of the adjacent conical dust collecting surfaces 3131 are connected to form horizontal edges, the area of the edges capable of collecting dust is small, and pollutants such as dust, sand and the like are not easy to deposit on the upper end part of the hollow pipe 313 in a large amount; the top ends of the adjacent conical dust collection surfaces 3131 can be connected into V-shaped bent edges with slopes, the bent edges have slopes, and pollutants such as dust, sand and the like falling on the bent edges can slide down under the action of gravity, so that the deposition of the pollutants is avoided. Contaminants such as dust, sand particles and the like slide down from the conical dust collection surface 3131 under the action of gravity and are timely discharged from the cyclone tube 32, so that the deposition of the contaminants on the dust collection surface is avoided, the influence of the contaminants 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. 5, 7 and 8, the inner hole at the lower end of the hollow tube 313 is an inner wall 316 and a circle of reverse buckling ribs 317 protruding inwards from top to bottom, and the bottom surface 319 of the hollow tube 313 is a horizontal surface. As shown in fig. 9, the swirl tube 32 has a cylindrical portion at the upper portion and a conical portion at the lower portion. As shown in fig. 9 and 10, 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 plane; 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. 9, 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. 4, 6 and 8, 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.
The lower part of each cyclone tube 32 with the cyclone sheet 321 is correspondingly positioned in the vertical cyclone tube sleeve 341, and the outline dimension of the outermost peripheral envelope of the cyclone sheet 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. Swirl tube sleeve 341 is integrated on lower cap 34 of prefilter assembly 3. 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. The outer surfaces of the adjacent cyclone tube sleeves 341 of the lower cover 34 can be connected and reinforced by using reinforcing ribs, the reinforcing ribs can ensure the integral strength of the lower cover 34 and the cyclone tube sleeves 341, and the stability and reliability of products are improved.
As shown in fig. 11 and 12, 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; an elongated dust discharging valve is fixed below the dust discharging injection pipe 55 outside the cover body 5156, dust valve 56 and lid 51 also can adopt integrated into one piece structure, and integrated into one piece structure can practice thrift installation cost, reduces the equipment work, has avoided the installation clearance between the part, improves the leakproofness, and then guarantees the prefiltering efficiency in the system. As shown in fig. 12, 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. 13, the dust exhaust valve 56 is provided with an oblong long groove 58, the cross section of the long groove 58 is triangular, and in other embodiments, the cross section of the long groove 58 can 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. External polluted air containing dust pollutants with various particle sizes and types 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 a cavity space 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 a cyclone sheet 321 area, cyclone is generated by high-speed rotation under the guide action of the cyclone sheet 321, the 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 flow velocity of the boundary fluid 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 from the upper opening of the cyclone tube 32 and reaches the outer surface of the main filter element 2, then passes through the main filter element 2 and the safety filter element to enter the filter element cavity, 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 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 slipped in the cyclone tube sleeve 341 is discharged 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 slips 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 core cavity in the safety filter core from the air outlet 8, and passes through the safety filter core and the main filter core 2 to strip dust pollutants deposited on the outer surface of the main filter core 2; the stripped dust and pollutant flows out of the cyclone tube 32 into the dust discharge valve 56 along with the compressed air fluid, and falls on the small cone-shaped dust collecting surface 3131 of the upper cover 31 of the prefilter assembly 3, and the dust and pollutant falls down along the inclined plane and gathers into the cyclone tube 32 under the action of gravity due to the inclined angle of the small cone-shaped dust collecting surface 3131, and flows out of the cyclone tube 32 into the dust discharge 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 valve 56 are directly discharged from the dust-discharging lip 57; a portion of the dust contaminants within the dust discharge valve 56 fall onto the dust discharge face 53 and under the force of gravity slide along the dust discharge face and are discharged from the dust discharge lip 57.
The air filter of the invention is provided with the small cone-shaped dust collection surface 3131 on the upper cover 31 of the prefilter assembly 3, the dust discharge surface 53 of the cover body 51 of the dust collection cover assembly 5 is an inclined plane with an inclined angle, a stepped surface or a downward curved surface, and the pollutants such as dust, sand and the like falling on the dust collection cover assembly 5 can slide into the cyclone tube 32 under the action of gravity and then enter the dust collection cover assembly 5 to be discharged from the dust discharge 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.
Claims (5)
1. The utility model provides an air cleaner's toper dust collection face structure which characterized in that: the cyclone tube (32) is arranged in the hollow tube (313) of the upper cover (31), the upper end part of the hollow tube (313) is provided with a conical dust collecting surface (3131), and the conical dust collecting surface (3131) is positioned above the cyclone tube (32); the conical dust collecting surface (3131) is a conical dust collecting surface or a pyramid dust collecting surface; the inner wall (316) of the hollow pipe (313) is provided with a protruding inverted first button (317), and after the cyclone pipe (32) is inserted into the hollow pipe (313), the inverted first button (317) is in interference fit with the outer cylindrical surface of the cyclone pipe (32); the outer wall (325) of the cyclone tube (32) is provided with a second back-off button (324), and after the cyclone tube (32) is inserted into the hollow tube (313), the second back-off button (324) is in interference fit with the inner wall (316) of the hollow tube (313); the first back-off button (317) and the second back-off button (324) are arranged in a staggered manner to realize interlocking; 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.
2. The conical dust collecting surface structure of an air cleaner according to claim 1, wherein: the top ends of adjacent conical dust collecting surfaces (3131) are connected through V-shaped zigzag edges.
3. The conical dust collecting surface structure of an air cleaner according to claim 1, wherein: the top ends of adjacent conical dust collecting surfaces (3131) are connected to form a horizontal edge.
4. The conical dust collecting surface structure of an air cleaner according to claim 1, wherein: the cyclone tube (32) comprises cyclone sheets (321) at the lower part, the cyclone tube sleeve (341) is arranged in the cyclone tube sleeve, the cyclone tube sleeve (341) is integrated on the lower cover (34), the cyclone tube sleeve (341) and the lower cover (34) are integrally formed, and reinforcing ribs are arranged between the outer surfaces of the adjacent cyclone tube sleeves (341).
5. The conical dust collecting surface structure of an air cleaner according to claim 1, wherein: swirl tube (32) periphery is integrated with swirl piece (321), and swirl tube (32) and swirl piece (321) are through integrated into one piece.
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| CN201910448980.4A CN110005553B (en) | 2019-05-28 | 2019-05-28 | Conical dust collecting surface structure of air filter |
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| CN110005553B true CN110005553B (en) | 2024-04-02 |
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| CN110005553A (en) | 2019-07-12 |
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