CN112473251A - Magnetic gear variable speed type oil smoke separation structure and range hood - Google Patents
Magnetic gear variable speed type oil smoke separation structure and range hood Download PDFInfo
- Publication number
- CN112473251A CN112473251A CN202011291963.3A CN202011291963A CN112473251A CN 112473251 A CN112473251 A CN 112473251A CN 202011291963 A CN202011291963 A CN 202011291963A CN 112473251 A CN112473251 A CN 112473251A
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- ring
- annular wall
- outer rotor
- inner rotor
- oil
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
- B01D45/12—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces
- B01D45/14—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces generated by rotating vanes, discs, drums or brushes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C15/00—Details
- F24C15/20—Removing cooking fumes
Abstract
The invention discloses a magnetic gear variable-speed type oil smoke separation structure and a range hood, wherein the magnetic gear variable-speed type oil smoke separation structure comprises: the rotary oil-isolating ring, the magnetic gear speed-changing mechanism, the blowing fan and the motor; the magnetic gear speed change mechanism comprises an inner rotor assembly, a middle stator assembly and an outer rotor assembly; the middle stator component is arranged between the inner rotor component and the outer rotor component, the outer rotor component and the inner rotor component rotate in opposite directions, and the rotating speed of the outer rotor component is greater than that of the inner rotor component; the inner rotor assembly, the blast fan and the motor rotating shaft rotate in the same direction and at the same speed; the rotary oil-separating ring and the outer rotor component rotate in the same direction and at the same speed. The invention realizes the speed-up conversion from a low-speed motor rotating shaft to a high-speed rotating oil-separating ring without contact, and the high-speed rotating oil-separating ring can capture and fling away grease particles more efficiently by virtue of stronger centrifugal force, thereby greatly improving the grease separation rate and the internal cleanness of the range hood.
Description
Technical Field
The invention belongs to the technical field of range hoods, and particularly relates to a magnetic gear variable-speed type oil smoke separation structure and a range hood.
Background
Along with the improvement of the living standard of people, the internal cleanness and the working noise of a range hood product become two important performance evaluation indexes in the field of range hood products except for the oil smoke absorption effect. At present, for guaranteeing inside cleanliness and the work efficiency of parts such as blast fan, motor of lampblack absorber, current lampblack absorber product is through setting up oil smoke separator in air intake department, blocks big particulate matter such as grease, water particle inside separator and through the oil groove filtering to realize the effective separation of grease particle and oil smoke gas.
The oil fume separation device on the current market has the following three common technical solutions: 1) an inner and an outer double-layer oil mesh type oil-smoke separation mesh structure. Usually, the outer oil net is in a long-strip hole shape, the inner oil net is in a net hole shape, oil particles are captured, condensed and collected after oil smoke passes through the two oil nets, and oil smoke gas enters the next-stage air channel. However, in order to ensure the effective air inlet area of the range hood, the mesh area of the oil screen is not too small, and the area of the grease blocking particles is limited, so that the oil-smoke separation efficiency of the structure is not high, and the double-layer oil screen structure also causes the defects of complex structure, excessive number of parts and complex disassembly and cleaning steps. 2) Static oil-separating net cover + rotary oil-separating ring/fan structure. The static oil separation net cover is a first-stage filter net, the shape of the net holes is mostly a rhombic or polygonal structure, and the static oil separation net cover is a fixing part and is generally fixed on the shell of the range hood through screws; the rotary oil-separating ring is a secondary filter screen, is usually made into a fan shape or a ring shape with a plurality of stainless steel filaments uniformly distributed combined structure, and is a rotating piece which generally has two fixing modes: firstly, the rotary oil-separating ring is fastened on one side end face of the blast fan through a locking nut, and the rotary oil-separating ring and the blast fan are of an integrated structure and rotate at the same speed; and secondly, the rotary oil-isolating ring is fastened at the tail end of the motor rotating shaft through a locking nut, is separated from the blowing fan, is integrated with the motor rotating shaft, and rotates at the same speed. By means of the centrifugal force action of the rotary oil-separating ring, grease particles are more efficiently thrown away and enter the oil groove, and the oil-smoke separation rate of the structure is higher than that of the first structure. However, the oil-smoke separation rate is limited by the centrifugal force of the rotating oil-separating ring, i.e. the rotating speed of the rotating oil-separating ring, and since the rotating speed of the rotating oil-separating ring is always consistent with the speed of the blower fan or the rotating shaft of the motor, the oil-smoke separation rate is actually limited by the rotating speed of the motor (the blower fan and the motor rotate coaxially), while the rotating speed of the motor of the range hood is not high, and the maximum rotating speed is generally lower than 1500 rpm. In addition, because the rotatory oil interceptor ring directly links with blast fan or motor shaft, the rotatory oil interceptor ring can bring unbalanced disturbance, seriously influences the dynamic balance of back both, and great noise is produced to the high possibility, reduces user's comfort in use.
Disclosure of Invention
Aiming at the defects or the improvement requirements of the prior art, the invention provides a magnetic gear variable-speed type oil smoke separation structure and a range hood. By adopting the magnetic gear speed change mechanism, the rotation speed increasing conversion from the low-speed motor rotating shaft to the high-speed rotating oil-separating ring is realized in a non-contact manner, the high-speed rotating oil-separating ring can capture and fling away grease particles more efficiently by virtue of stronger centrifugal force, and the grease separation rate and the internal cleanness of the range hood are improved to a great extent. The magnetic gear speed change mechanism is small in size, is integrally arranged in the accommodating cavity of the locking nut of the blowing fan, and the oil fume separation structure does not have a complex multi-layer filtering net cover, so that the wind resistance of an oil fume air channel cannot be increased, and the oil fume suction efficiency of the range hood can be effectively ensured. More preferably, the rotary oil-separating ring is independently arranged on the outer rotor component of the magnetic gear speed change mechanism, is not in any mechanical contact with the motor, the motor rotating shaft and the blowing fan, can not bring unbalanced disturbance, and can influence the rotary dynamic balance of the motor, the motor rotating shaft and the blowing fan, so that extra work noise of the range hood can not be generated, and the use comfort of a user is improved.
The invention discloses a magnetic gear variable speed type oil smoke separation structure, which comprises:
the rotary oil-isolating ring, the magnetic gear speed-changing mechanism, the blowing fan and the motor;
the magnetic gear speed change mechanism comprises an inner rotor assembly, a middle stator assembly and an outer rotor assembly; the middle stator component is arranged between the inner rotor component and the outer rotor component so as to realize the reverse rotation of the outer rotor component and the inner rotor component, and the rotating speed of the outer rotor component is greater than that of the inner rotor component;
the inner rotor assembly and the blowing fan are connected with a motor rotating shaft of the motor, so that the inner rotor assembly, the blowing fan and the motor rotating shaft rotate in the same direction and at the same speed;
the rotary oil-separating ring is connected with the outer rotor assembly so as to enable the rotary oil-separating ring and the outer rotor assembly to rotate in the same direction and at the same speed; the rotary oil-separating ring is arranged behind the blowing fan along the airflow direction.
Optionally, the inner rotor assembly, the intermediate stator assembly and the outer rotor assembly are arranged radially in sequence or axially in sequence.
Optionally, the inner rotor assembly includes an inner rotor core and an inner rotor magnetic steel; the inner rotor magnetic steel is formed by circumferentially and sequentially adjacently arranging inner rotor magnetic steel blocks with different polarities and annularly arranging the inner rotor magnetic steel blocks on the outer side of the inner rotor iron core, and the inner rotor magnetic steel is connected with the inner rotor iron core; the outer rotor assembly comprises an outer rotor iron core, outer rotor magnetic steel and an outer rotor shell; the outer rotor magnetic steel is formed by circumferentially and sequentially arranging outer rotor magnetic steel blocks with different polarities adjacently and annularly arranging the outer rotor magnetic steel blocks on the outer side of the inner rotor magnetic steel, the outer rotor iron core is sleeved on the outer side of the outer rotor magnetic steel and is connected with the outer rotor iron core, the outer rotor shell is sleeved on the outer side of the outer rotor iron core, and the outer rotor shell is connected with the outer rotor iron core; the outer rotor shell is connected with the rotary oil isolating ring; the middle stator component comprises a modulation ring and a stator support, a plurality of modulation units are arranged on the periphery of the modulation ring, the modulation ring is arranged between the inner rotor magnetic steel and the outer rotor magnetic steel, and the modulation ring is fixed through the stator support.
Optionally, the outer rotor shell comprises a first annular wall and a second annular wall which are arranged in sequence along the axial direction, and a first annular connecting plate for connecting the first annular wall and the second annular wall; the first annular wall is disposed adjacent to the rotary oil-separating ring, and the second annular wall is disposed adjacent to the blower fan; the stator support comprises a third annular wall, a fourth annular wall and a second annular connecting plate, wherein the third annular wall and the fourth annular wall are sequentially arranged along the axial direction; the third annular wall is disposed adjacent to the rotary oil-separating ring, and the fourth annular wall is disposed adjacent to the blower fan; the outer rotor shell is sleeved on the outer side of the stator support, the first annular wall is sleeved on the outer side of the third annular wall, and a bearing is arranged between the first annular wall and the third annular wall; the first annular connecting plate is connected with the rotary oil-separating ring, and the rotary oil-separating ring is sleeved outside the first annular wall; the second annular wall is sleeved on the outer side of the fourth annular wall, the fourth annular wall is connected with the modulation ring, and the inner side wall of the second annular wall is connected with the outer rotor iron core; the third annular wall and the motor rotating shaft are axially arranged oppositely.
Optionally, the second annular wall is provided with a first limiting part for limiting the outer rotor assembly to move axially towards one side of the rotary oil-separating ring; and/or the first annular wall is provided with a second limiting part for limiting the axial movement of the bearing towards one side of the rotary oil-separating ring, the third annular wall is provided with a third limiting part for limiting the axial movement of the bearing towards one side of the blowing fan, and the bearing is clamped between the second limiting part and the third limiting part; and/or the modulation ring is formed by sequentially axially stacking a plurality of modulation ring sheets; and/or the distance between the rotary oil-separating ring and the blast fan is not more than 1 mm.
Optionally, the range hood further comprises a range hood end cover, and the range hood end cover is arranged on one side, away from the blowing fan, of the rotary oil isolating ring; the range hood end cover is connected with the stator support, and the range hood end cover is connected with the range hood shell to fix the stator support and the modulation ring.
Optionally, the range hood end cover comprises an end cover inner ring, an end cover outer ring and structural ribs; the outer ring of the end cover is sleeved on the outer side of the inner ring of the end cover, the inner ring of the end cover is connected with the outer ring of the end cover through the structural ribs, and the structural ribs are arranged in the circumferential direction.
Optionally, the inner rotor assembly is arranged close to one side of the blower fan, and the outer rotor assembly is arranged close to one side of the rotary oil-separating ring; the inner rotor assembly comprises inner rotor magnetic steel and an inner rotor yoke; the inner rotor magnetic steels with different polarities are circumferentially and sequentially arranged on the surface of one side, close to the middle stator component, of the inner rotor yoke; the middle stator component comprises a modulation ring and a stator bracket; the modulation ring is fixed through the stator bracket; the outer rotor component comprises outer rotor magnetic steel and an outer rotor yoke; the outer rotor magnetic steels with different polarities are circumferentially and sequentially arranged on the surface of one side, close to the middle stator assembly, of the outer rotor yoke.
Optionally, the blower fan is connected with the motor rotating shaft through a blower fan locking nut; the locking nut of the blowing fan comprises a threaded annular wall, a fifth annular wall and a sixth annular wall which are sequentially arranged from inside to outside along the radial direction, a third annular connecting plate used for connecting the threaded annular wall and the fifth annular wall, and a fourth annular connecting plate used for connecting the fifth annular wall and the sixth annular wall; the third annular connecting plate and the fourth annular connecting plate are axially arranged at two ends of the fifth annular wall respectively, the threaded annular wall and the fifth annular wall are arranged on the third annular connecting plate at the same side, the third annular connecting plate is arranged close to the blowing fan, and the fourth annular connecting plate is arranged close to the rotary oil-separating ring; the fifth annular wall and the sixth annular wall are arranged on the same side of the fourth annular connecting plate; the thread ring wall is in threaded connection with the motor rotating shaft so as to fix the blowing fan on the motor rotating shaft, and the third annular connecting plate and the fifth ring wall are jointly surrounded to form a containing cavity for containing the magnetic gear speed change mechanism.
The invention also discloses a range hood, which comprises: a range hood shell and any one of the magnetic gear variable-speed type oil fume separation structures; the range hood shell is arranged on the outer side of the magnetic gear variable speed type oil fume separation structure; the range hood casing corresponds rotatory oil ring is equipped with the air intake, the range hood casing corresponds the air-blower is equipped with the air outlet.
In general, compared with the prior art, the above technical solution contemplated by the present invention can achieve the following beneficial effects:
1. in the invention, the rotary oil-separating ring, the blast fan and the motor rotating shaft are in a split structure, the blast fan and the inner rotor assembly are connected with the motor rotating shaft, so that the blast fan, the inner rotor assembly and the motor rotating shaft rotate in the same direction and at the same speed, but the rotary oil-separating ring is connected with the outer rotor assembly and rotates in the same direction and at the same speed, the rotation direction of the outer rotor assembly is opposite to that of the inner rotor assembly, the rotation speed of the outer rotor assembly is higher than that of the blast fan, the rotation direction of the rotary oil-separating ring is opposite to that of the blast fan, and the oil smoke particles can be more effectively blocked by virtue of the advantage of high rotation speed, so that the problem that the oil smoke separation rate in the prior art is limited by oil-separating centrifugal force (namely the rotation speed of the rotary oil-separating; in addition, the rotary oil-separating ring is not connected with the blast fan or the motor rotating shaft, so that the rotary oil-separating ring is not in any mechanical contact with the motor rotating shaft rotating at low speed, the rotary oil-separating ring is not disturbed by unbalance of the blast fan or the motor any more, and the rotary dynamic balance of the blast fan and the motor is not influenced, so that extra work noise of the range hood is not generated, the generation probability of the noise is reduced, and the use comfort of a user is improved; more preferably, the high-speed rotation of the rotary oil-separating ring is realized through the magnetic gear speed change mechanism, the dynamic balance is good, and the noise is low.
2. According to the range hood, the structural arrangement mode of the magnetic gear speed change mechanism for realizing the different-speed operation of the rotary oil-isolating ring and the motor rotating shaft can be radial or axial, and the structure can be selectively arranged according to the structure of the range hood, so that the diversification and personalized setting of the range hood product are improved, and different market requirements are met. More preferably, according to the application environment of the range hood, different transmission ratios of the magnetic gear speed change mechanism can be obtained by adjusting the number of poles of the inner rotor magnetic steel, the number of poles of the outer rotor magnetic steel and the number of modulation units of the modulation ring, so that the diversification and the application range of the range hood are further improved. Preferably, the modulation ring is formed by axially and sequentially overlapping a plurality of modulation ring sheets, so that the iron loss of the magnetic gear speed change mechanism is reduced, and the service life of the magnetic gear speed change mechanism is prolonged.
3. In the invention, the magnetic gear speed change mechanism arranged in the radial direction has a compact structure, not only realizes the limiting and positioning of each component in the radial direction, but also realizes the limiting and positioning of each component in the axial direction, so that the magnetic gear speed change mechanism runs more stably and has low noise; preferably, the magnetic gear speed change mechanism can be accommodated in an internal cavity of a locking nut of the blowing fan for mounting the blowing fan, and does not occupy any flow channel space of axial oil smoke (fluid), so that the reduction of the air draft efficiency of the range hood due to the increase of wind resistance in the flow channel can be avoided. More excellent, the quantity restriction and the width restriction of structure rib have further reduced the axial runner windage of lampblack absorber to the good convulsions efficiency of this lampblack absorber has been guaranteed.
Drawings
FIG. 1 is a schematic diagram of an exploded view of an embodiment of a magnetic gear variable-speed oil-smoke separation structure according to the present invention;
FIG. 2 is a schematic structural view of another embodiment of a magnetic gear variable-speed oil-smoke separation structure according to the present invention;
FIG. 3 is a schematic cross-sectional view of another embodiment of a magnetic gear variable-speed oil-smoke separation structure according to the present invention;
FIG. 4 is a schematic structural view of one embodiment of a range hood end cover of the present invention;
FIG. 5 is a schematic cross-sectional view of FIG. 4;
FIG. 6 is a schematic structural diagram of one embodiment of a stator frame of the present invention;
fig. 7 is a schematic structural view of an embodiment of an outer rotor casing according to the present invention;
FIG. 8 is a schematic structural diagram of an embodiment of a magnetic gear shifting mechanism of the present invention;
FIG. 9 is a schematic diagram of the exploded view of FIG. 8;
fig. 10 is a schematic structural diagram of an embodiment of the range hood of the present invention.
In all the figures, the same reference numerals denote the same features, in particular: 1-range hood end cover, 101-bolt mounting hole, 102-spigot surface, 103-right end surface, 104-end cover fixing bolt mounting hole, 105-end cover inner ring, 106-structural rib, 107-end cover outer ring, 108-end cover fixing bolt, 2-rotary oil-separating ring, 201-first rotary oil-separating ring fastening rivet mounting hole, 3-magnetic gear speed change mechanism, 4-blower fan locking nut, 5-blower fan, 6-motor, 7-motor rotating shaft, 8-inner rotor iron core, 9-inner rotor magnetic steel, 901-inner rotor magnetic steel block, 10-stator support, 1001-thread blind hole, 1002-modulation ring fastening rivet mounting hole, 1003-stator support shaft shoulder, 1004-support left end surface, 11-modulation ring, 103-right end surface, 104-first rotary oil-separating ring fastening rivet mounting hole, 3-magnetic gear speed change mechanism, modulation fan locking nut, 1101-modulation unit, 1102-modulation ring fixing through hole, 12-outer rotor magnetic steel, 1201-outer rotor magnetic steel block, 13-outer rotor iron core, 14-outer rotor shell, 1401-second rotary oil-separating ring fastening rivet mounting hole, 1402-left end stop face, 1403-right end stop face, 1404-inner surface, 15-bearing, 16-magnetic gear fastening bolt, 17-rotary oil-separating ring fastening rivet, 18-modulation ring fastening rivet, 19-bearing retainer ring, 20-modulation ring retainer ring, 21-key, 22-outer rotor yoke, 23-inner rotor yoke, 24-range hood casing, 2401-air inlet and 2402-air outlet.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
In an embodiment of the present invention, as shown in fig. 1 to 7, the present invention discloses a magnetic gear speed change type oil smoke separating structure, comprising: the rotary oil-separating ring 2, the magnetic gear speed-changing mechanism 3, the blast fan 5 and the motor 6; the magnetic gear speed change mechanism 3 comprises an inner rotor assembly, a middle stator assembly and an outer rotor assembly; the middle stator component is arranged between the inner rotor component and the outer rotor component so as to realize the reverse rotation of the outer rotor component and the inner rotor component, and the rotating speed of the outer rotor component is greater than that of the inner rotor component; the inner rotor assembly and the blowing fan 5 are both connected with a motor rotating shaft 7 of the motor 6, so that the inner rotor assembly, the blowing fan 5 and the motor rotating shaft 7 rotate in the same direction and at the same speed; the rotary oil-separating ring 2 is connected with the outer rotor component, so that the rotary oil-separating ring 2 and the outer rotor component rotate in the same direction and at the same speed; the rotary oil-trap ring 2 is disposed behind the blower fan 5 in the direction of air flow. In practical application, when this lampblack absorber is in operating condition, the oil smoke realizes the oil smoke separation via the 5 outflow of blast fan through rotatory oil separator ring 2 earlier under the effect of blast fan 5, and whole process noise at work is little, oil smoke separation efficiency is high and effectual, therefore the inside cleanliness factor of lampblack absorber is good for the performance index of this lampblack absorber is greater than current lampblack absorber far away.
Optionally, the inner rotor assembly, the intermediate stator assembly and the outer rotor assembly are arranged radially in sequence.
Optionally, the inner rotor assembly includes an inner rotor core 8 and an inner rotor magnetic steel 9; the inner rotor iron core 8 is sleeved on the outer side of the motor rotating shaft 7 and connected with the motor rotating shaft 7, the inner rotor magnetic steel 9 is formed by circumferentially and sequentially adjacently arranging inner rotor magnetic steel blocks 901 with different polarities and annularly arranging the inner rotor magnetic steel blocks on the outer side of the inner rotor iron core 8, and the inner rotor magnetic steel 9 is connected with the inner rotor iron core 8; the outer rotor component comprises an outer rotor iron core 13, outer rotor magnetic steel 12 and an outer rotor shell 14; the outer rotor magnetic steel 12 is formed by circumferentially and sequentially arranging outer rotor magnetic steel blocks 1201 with different polarities adjacently and annularly arranging the outer rotor magnetic steel blocks on the outer side of the inner rotor magnetic steel 9, an outer rotor iron core 13 is sleeved on the outer side of the outer rotor magnetic steel 12, the outer rotor magnetic steel 12 is connected with the outer rotor iron core 13, an outer rotor shell 14 is sleeved on the outer side of the outer rotor iron core 13, and the outer rotor shell 14 is connected with the outer rotor iron core 13; the outer rotor shell 14 is connected with the rotary oil-separating ring 2; the middle stator assembly comprises a modulation ring 11 and a stator support 10, a plurality of modulation units 1101 are arranged on the periphery of the modulation ring 11, the modulation ring 11 is arranged between inner rotor magnetic steel 9 and outer rotor magnetic steel 12, and the modulation ring 11 is fixed through the stator support 10.
Alternatively, the outer rotor casing 14 includes a first annular wall and a second annular wall arranged in this order along the axial direction, and a first annular connecting plate for connecting the first annular wall and the second annular wall; the first annular wall is arranged close to the rotary oil-separating ring 2, and the second annular wall is arranged close to the blast fan 5; the stator support 10 comprises a third annular wall and a fourth annular wall which are sequentially arranged along the axial direction, and a second annular connecting plate used for connecting the third annular wall and the fourth annular wall; the third annular wall is arranged close to the rotary oil-separating ring 2, and the fourth annular wall is arranged close to the blast fan 5; the outer rotor shell 14 is sleeved outside the stator support 10, the first annular wall is sleeved outside the third annular wall, and a bearing 15 is arranged between the first annular wall and the third annular wall; the first annular connecting plate is connected with a rotary oil-separating ring 2, and the rotary oil-separating ring 2 is sleeved outside the first annular wall; the second annular wall is sleeved on the outer side of the fourth annular wall, the fourth annular wall is connected with the modulation ring 11, and the inner side wall of the second annular wall is connected with the outer rotor iron core 13; the third annular wall is arranged opposite to the motor rotating shaft 7 in the axial direction.
Alternatively, the modulation ring 11 is formed by a plurality of modulation ring sheets stacked in sequence in the axial direction. Preferably, the modulation ring sheets are gear-shaped silicon steel sheets, a modulation unit 1101 is formed by a tooth-shaped structure of each gear-shaped silicon steel sheet, the tooth-shaped structure is provided with a modulation ring fixing through hole 1102, the stator support 10 is provided with a modulation ring fastening rivet installation hole 1002 corresponding to the modulation ring fixing through hole 1102, and the modulation ring fastening rivet 18 sequentially penetrates through the modulation ring fastening rivet installation hole 1002 and the modulation ring fixing through hole 1102 and then is matched with the modulation ring baffle ring 20, so that the modulation ring 11 is positioned and fastened. It should be noted that the outer rotor housing 14, the stator frame 10 and the modulation ring baffle ring 20 are made of non-magnetic materials, such as aluminum alloy, non-magnetic stainless steel, etc. In practical application, the inner rotor magnetic steel 9 can be directly attached to the inner rotor iron core 8 through the magnetic attraction between the inner rotor magnetic steel and the inner rotor iron core 8, and is fixed on the inner rotor iron core 8 through magnetic steel glue; similarly, the outer rotor magnetic steel 12 may also be connected to the outer rotor iron core 13 through magnetic attraction and magnetic steel glue.
Alternatively, the second annular wall is provided with a first stopper portion for restricting the outer rotor assembly from moving axially toward the side of the rotary oil slinger 2. Alternatively, the first annular wall is provided with a second stopper portion for restricting the axial movement of the bearing 15 toward the side of the oil slinger 2, the third annular wall is provided with a third stopper portion for restricting the axial movement of the bearing 15 toward the side of the blower fan 5, and the bearing 15 is interposed between the second stopper portion and the third stopper portion. Specifically, the second limiting portion limits the left end of the outer ring of the bearing 15, so that the outer ring of the bearing 15 is conveniently installed in interference fit with the first ring wall, and preferably, the second limiting portion further comprises a fourth limiting portion (namely, a bearing baffle ring 19 in the following) for limiting the right end of the outer ring of the bearing 15, and the fourth limiting portion is detachably connected with the outer rotor housing 14, so that the bearing 15 is conveniently detached from and limited by the first ring wall; the inner ring of the bearing 15 is fixedly mounted on the third annular wall by the range hood end cover 1 and a third limiting part (namely, a stator bracket shaft shoulder 1003).
Preferably, the inner diameter of the second annular wall is not equal, and the inner diameter of the first right annular wall section near the side of the blower fan 5 is greater than the inner diameter of the first left annular wall section near the side of the rotary oil-separating ring 2, so that the second annular wall forms a right end stop surface 1403 (i.e., a first limit portion) at the junction of the first right annular wall section and the first left annular wall section, the outer rotor core 13 is in interference fit with the inner surface 1404 of the first right annular wall section, and the end surface of the outer rotor core 13 near the side of the first left annular wall section abuts against the right end stop surface 1403; the end part of the first ring wall on the side far away from the second ring wall forms a left-end spigot surface 1402, that is, the inner diameter size of the second right ring wall on the side of the first ring wall close to the second ring wall is larger than the inner diameter size of the second left ring wall on the side of the first ring wall far away from the second ring wall, so that the first ring wall forms a left-end spigot surface 1402 (that is, a second limiting part) at the junction of the second right ring wall section and the second left ring wall section; the outer diameter of the third right annular wall of the third annular wall close to the fourth annular wall is greater than the outer diameter of the third left annular wall of the third annular wall far from the fourth annular wall, so that a stator support shaft shoulder 1003 (i.e., a third limiting portion) is formed at the junction of the third right annular wall and the third left annular wall, and the bearing 15 is limited between the stator support shaft shoulder 1003 and the left end seam allowance face 1402 to ensure that the outer rotor housing 14 is rotatably disposed on the stator support 10. In practice, the outer race of the bearing 15 is an interference fit with the first annular wall.
Preferably, the end surface of the bearing 15 close to the fourth ring wall is further limited by the bearing retaining ring 19 sleeved outside the third ring wall and the stator support shaft shoulder 1003, and the bearing retaining ring 19 is connected with the first annular connecting plate of the outer rotor housing 14. Specifically, the rotary oil-separating ring 2 comprises an inner ring plate, an outer ring and structural ribs which extend in the radial direction and are respectively connected with the inner ring plate and the outer ring at two ends, and the structural ribs are arranged in a radial shape; the outer side of the first ring wall is sleeved with the inner ring plate, a first rotary oil-separating ring fastening rivet mounting hole 201, a second rotary oil-separating ring fastening rivet mounting hole 1401 and a third rotary oil-separating ring fastening rivet mounting hole are axially and correspondingly arranged on the inner ring plate, the first ring connecting plate and the bearing baffle ring 19, and the rotary oil-separating ring fastening rivet 17 sequentially penetrates through the first rotary oil-separating ring fastening rivet mounting hole 201, the second rotary oil-separating ring fastening rivet mounting hole 1401 and the third rotary oil-separating ring fastening rivet mounting hole to realize the connection of the inner ring plate, the first ring connecting plate and the bearing baffle ring 19. In practical applications, the cross-sectional shape of the bearing retainer 19 may be a straight shape or an L-shape.
Alternatively, the interval between the rotary oil-separating ring 2 and the blower fan 5 is not more than 1 mm. Namely, the distance between the end surface of the rotary oil-separating ring 2 close to one side of the blast fan 5 and the end surface of the blast fan 5 close to one side of the rotary oil-separating ring 2 is not more than 1mm, so that the oil smoke entering the blast fan 5 is ensured to flow through the rotary oil-separating ring 2 first, and the excellent performance of isolating the oil smoke by the range hood is ensured.
Optionally, the range hood further comprises a range hood end cover 1, wherein the range hood end cover 1 is arranged on one side, away from the blowing fan 5, of the rotary oil-isolating ring 2; lampblack absorber end cover 1 is connected with stator support 10, and lampblack absorber end cover 1 is connected with lampblack absorber casing 24 to realize modulation ring 11's fixed.
Optionally, the range hood end cover 1 comprises an end cover inner ring 105, an end cover outer ring 107 and structural ribs 106; the end cover outer ring 107 is sleeved outside the end cover inner ring 105, the end cover inner ring 105 and the end cover outer ring 107 are connected through structural ribs 106, and the structural ribs 106 are arranged circumferentially. Preferably, the number of structural ribs 106 is no more than 10, and the width of the structural ribs 106 is no more than 30 mm. Preferably, the number of the structural ribs 106 is 5, and the structural ribs are uniformly distributed between the end cover inner ring 105 and the end cover outer ring 107 and are arranged in a radial shape; preferably, the structural ribs 106 are 20mm wide. It is worth mentioning that the number and width of the structural ribs 106 can be specifically set according to the size or actual needs of the range hood.
Optionally, a circular truncated cone protrudes from one side of the end cover inner ring 105 facing the rotary oil-separating ring 2, a right end face 103 of the circular truncated cone, which is far away from one side of the end cover inner ring 105, is arranged close to the third annular wall, the circular truncated cone is sleeved on the outer side of the end portion of the third annular wall, which is far away from one side of the fourth annular wall, a threaded blind hole 1001 is arranged on the end face of the third annular wall, which is far away from the fourth annular wall, a bolt mounting hole 101 is arranged on the circular truncated cone corresponding to the threaded blind hole 1001, and a magnetic gear fastening bolt 16 sequentially penetrates through the bolt mounting hole 101 and then. The circular truncated cone is provided with a notch surface 102 corresponding to the third annular wall, so that a bracket left end surface 1004 of the stator bracket 10 on the side close to the circular truncated cone abuts against the notch surface 102 to restrict axial displacement of the stator bracket 10 toward the magnetic gear fastening bolt 16. Optionally, an end cover fixing bolt mounting hole 104 is formed in the end cover outer ring 107, and an end cover fixing bolt 108 penetrates through the end cover fixing bolt mounting hole 104 and then is connected with the range hood housing 24 to fixedly connect the range hood end cover 1 with the range hood housing 24, so that fixing of the middle stator assembly is achieved.
Optionally, the blower fan 5 is connected with the motor rotating shaft 7 through the blower fan locking nut 4; the locking nut 4 of the blowing fan comprises a threaded annular wall, a fifth annular wall and a sixth annular wall which are sequentially arranged from inside to outside along the radial direction, a third annular connecting plate used for connecting the threaded annular wall and the fifth annular wall, and a fourth annular connecting plate used for connecting the fifth annular wall and the sixth annular wall; the third annular connecting plate and the fourth annular connecting plate are axially arranged at two ends of the fifth annular wall respectively, the threaded annular wall and the fifth annular wall are arranged on the third annular connecting plate at the same side, the third annular connecting plate is close to the blowing fan 5, and the fourth annular connecting plate is close to the rotary oil-separating ring 2; the fifth annular wall and the sixth annular wall are arranged on the same side of the fourth annular connecting plate; the thread ring wall is in threaded connection with the motor rotating shaft 7 so as to fix the blowing fan 5 on the motor rotating shaft 7, and the third annular connecting plate and the fifth ring wall jointly enclose a containing cavity for containing the magnetic gear speed change mechanism 3.
In practical application, the magnetic gear speed change mechanism 3 changes the air gap permeance by arranging the modulation ring 11 between the air gaps of the inner rotor assembly and the outer rotor assembly, so that the space harmonic rotation speed of the air gap magnetic field is changed to realize the variable speed rotation of the inner rotor and the outer rotor. And different transmission ratios can be obtained by adjusting the number of poles of the inner rotor magnetic steel, the number of poles of the outer rotor magnetic steel and the number of the modulation units 1101 of the modulation ring 11. As shown in FIG. 3, the number of inner rotor magnetic steel blocks is recorded as 901, i.e. the number of inner rotor magnetic steel poles is piThe number of the outer rotor magnetic steel blocks 1201, namely the number of the outer rotor magnetic steel poles is poThe number of the modulation units 1101 of the modulation ring 11 is Z, the rotating speed of the inner rotor assembly (the motor rotating shaft 7, the inner rotor iron core 8 and the inner rotor magnetic steel 9) is niAn outer rotor component (outer rotor magnetic steel 12,The outer rotor shell 14 and the rotary oil-separating ring 2) have the rotating speed of noA transmission ratio of Gr。
In order to effectively improve the efficiency of the oil-fume separation of the rotary oil-separating ring 2, it is necessary to realize stable rotation at a rotation speed noNeed to be higher than the rotating speed n of the rotating shaft 7 of the motoriThat is, in order to stably realize the speed-up conversion from the inner rotor assembly to the outer rotor assembly in the magnetic gear speed change mechanism 3, the above-defined physical quantities must satisfy the following relationship:
note that the inner rotor assembly has a rotation speed opposite to the rotation speed of the outer rotor assembly in sign, i.e., the rotation directions of the inner rotor assembly and the outer rotor assembly are opposite; the number of poles of the inner rotor magnetic steel is more than that of the outer rotor magnetic steel; rotating speed n of rotary oil-separating ring 2oWith the rotation speed n of the motor shaft 7iSpeed multiple between, i.e. transmission ratio GrDepending on the number p of poles of magnetic steel of the inner rotoriNumber p of poles of magnetic steel with outer rotoroThe ratio of (a) to (b).
Illustratively, as shown in FIG. 3, when the number of poles p of the inner rotor magnetic steel is equal toi12, number of poles p of outer rotor magnetic steelo4, when the number Z of the modulation units is 16, the 3-time rotation speed increase from the motor rotating shaft 7 to the rotary oil-separating ring 2 can be realized.
In another embodiment of the present invention, as shown in fig. 8 and 9, unlike the above-described embodiments, the inner rotor assembly, the middle stator assembly, and the outer rotor assembly of the present embodiment are arranged axially in order. The inner rotor component is arranged close to one side of the blast fan 5, and the outer rotor component is arranged close to one side of the rotary oil-separating ring 2; the inner rotor assembly comprises inner rotor magnetic steel 9 and an inner rotor yoke 23; the inner rotor magnetic steels 9 with different polarities are circumferentially and sequentially arranged on the surface of the inner rotor yoke 23 close to one side of the middle stator component; the middle stator assembly comprises a modulation ring 11 and a stator bracket 10; the modulation ring 11 is fixed by the stator support 10; the outer rotor component comprises outer rotor magnetic steel 12 and an outer rotor yoke 22; the outer rotor magnetic steels 12 with different polarities are circumferentially arranged on the surface of the outer rotor yoke 22 close to one side of the middle stator assembly in sequence. Illustratively, as shown in FIGS. 8 and 9,the number p of poles of the outer rotor magnetic steel of the embodiment o8, the number Z of the modulation units is 32, and the number p of the magnetic steel poles of the inner rotoriAt 24, the speed of the motor rotating shaft 7 to the rotating oil-separating ring 2 can be increased by 3 times.
Exemplarily, as shown in fig. 1 to 7, a magnetic gear speed change type oil smoke separation structure includes: the range hood comprises a range hood end cover 1, a rotary oil-isolating ring 2, a magnetic gear speed change mechanism 3, a blowing fan locking nut 4, a blowing fan 5, a motor 6 and a motor rotating shaft 7; wherein, the magnetic gear speed change mechanism 3 includes: the rotor comprises an inner rotor iron core 8, inner rotor magnetic steel 9, a stator support 10, a modulation ring 11, outer rotor magnetic steel 12, an outer rotor iron core 13, an outer rotor shell 14, a bearing 15, a magnetic gear fastening bolt 16, a rotary oil-isolating ring fastening rivet 17, a modulation ring fastening rivet 18, a bearing retaining ring 19 and a modulation ring retaining ring 20.
The rotary oil-separating ring 2, the blast fan 5 and the motor rotating shaft 7 are in a split structure. The blower fan 5 is fastened on the surface of the motor shaft 7 through a blower fan lock nut 4, and the rotary oil-separating ring 2 is independently fastened on the high-speed outer rotor shell 14 of the magnetic gear speed-changing mechanism 3 through a rotary oil-separating ring fastening rivet 17 and rotates at the same speed. Wherein, the magnetic gear speed change mechanism 3 realizes the speed change between two rotors (namely an inner rotor component and an outer rotor component) without mechanical contact: the motor rotating shaft 7, the inner rotor iron core 8 and the inner rotor magnetic steel 9 form a low-speed inner rotor assembly of the magnetic gear speed change mechanism 3, and the rotating speed of the inner rotor assembly is the same as that of the motor 6; the outer rotor magnetic steel 12, the outer rotor iron core 13, and the outer rotor case 14 constitute a high-speed outer rotor assembly of the magnetic gear speed change mechanism 3. The magnetic gear speed change mechanism 3 belongs to a concentric magnetic field modulation type permanent magnet gear topology, and preferably adopts a radial magnetic gear structure (of course, an axial structure can also be used as another preferable scheme), and the schematic cross-sectional view of the concentric radial magnetic gear structure is shown in fig. 3, and comprises an inner rotor assembly (a motor rotating shaft 7, an inner rotor iron core 8 and inner rotor magnetic steel 9), a middle stator assembly (a modulation ring 11 and a stator support 10, and the modulation ring 11 and the stator support 10 are connected through a modulation ring fastening rivet 18) and an outer rotor assembly (an outer rotor magnetic steel 12, an outer rotor iron core 13 and an outer rotor shell 14).
The inner rotor magnetic steel 9 and the outer rotor magnetic steel 12 are respectively clung to the outer surface of the inner rotor iron core 8 and the inner surface of the outer rotor iron core 13 through magnetic steel glue. The right end face of the inner rotor iron core 8 is abutted against the shaft shoulder of the motor rotating shaft 7, and the inner surface of the inner rotor iron core is abutted against the outer surface of the motor rotating shaft 7 and is connected and fastened through a key 21. The left end face of the outer rotor core 13 abuts against the left end seam allowance face 1402 of the outer rotor housing 14 and is fastened to the inner surface 1404 of the outer rotor housing 14 by interference fit.
The outer rotor case 14 has a z-shaped cylindrical structure and is made of a non-magnetic material (e.g., aluminum alloy, non-magnetic stainless steel, etc.). The right end face of the lower edge of the rotary oil-separating ring 2 is tightly attached to the left end face (namely, a first annular connecting plate) of the outer rotor shell 14, and the rotary oil-separating ring fastening rivet 17 is matched with the first rotary oil-separating ring fastening rivet mounting hole 201 and the second rotary oil-separating ring fastening rivet mounting hole 1401, so that the rotary oil-separating ring 2 is fastened and connected with the outer rotor shell 14. Preferably, in order to ensure that the oil smoke particles do not enter the blowing fan 5, the distance from the right end surface of the rotary oil-separating ring 2 to the left end surface of the blowing fan 5 is less than 1 mm. The rotary oil-separating ring 2 is independently positioned on the high-speed outer rotor shell 14 of the magnetic bearing, does not have any mechanical contact with the low-speed motor rotating shaft 7, and can block oil smoke particles more effectively by virtue of the advantage of high rotating speed.
The modulation ring 11 is formed by axially laminating gear-shaped silicon steel sheets, a plurality of modulation units 1101 are circumferentially and uniformly distributed, a modulation ring fixing through hole 1102 is formed in each modulation unit 1101, and the modulation ring 11 is arranged between the stator support 10 and the modulation ring retaining ring 20 in parallel. The stator support 10 and the modulation ring baffle ring 20 are made of non-magnetic materials (such as aluminum alloy, non-magnetic stainless steel and the like). The stator support 10 is a z-shaped cylindrical structure, and a plurality of modulation ring fastening rivet mounting holes 1002 are axially and uniformly distributed on one end of the stator support. The modulation ring fastening rivet 18 is matched with the modulation ring fastening rivet mounting hole 1002, the modulation ring fixing through hole 1102 and the modulation ring baffle ring 20, so that the modulation ring 11 is positioned and fastened.
The outer ring of the bearing 15 and the outer rotor shell 14 are in interference fit, the right end face of the outer ring of the bearing 15 abuts against the left end face of the bearing retaining ring 19 of the L-shaped thin plate, and the left end face of the outer ring of the bearing 15 abuts against the left end seam allowance face 1402 of the outer rotor shell 14; the right end face of the inner ring of the bearing 15 abuts against the stator support shaft shoulder 1003, and the left end face of the inner ring of the bearing 15 abuts against the right end face 103 of the range hood end cover 1. Because the outer rotor shell 14 is fastened and connected with the bearing retainer ring 19 through the rotary oil-proof ring fastening rivet 17, the range hood end cover 1 is fastened on the range hood shell 24 through the end cover fixing bolt 108, the left end face 1004 of the stator support 10 is limited on the spigot face 102 of the range hood end cover 1, and the effective fixation of the range hood end cover is realized through the matching between the magnetic gear fastening bolt 16 and the bolt mounting hole 101 and the threaded blind hole 1001, the bearing 15 is reliably limited and fixed on the stator support 10, and the range hood end cover is prevented from sliding in the axial direction.
The range hood end cover 1 is in a flat circular ring shape and is divided into an end cover inner ring 105, a structural rib 106 and an end cover outer ring 107. The thickness of the cross section of the end cover inner ring 105 needs to be thicker than the structural ribs 106 and the end cover 107 so as to support the stator frame 10 reliably. In addition, in order to reduce lampblack absorber axial flow channel windage resistance, structural rib 106 number should not be too much, and the width should not be too thick, and structural rib 106 number is preferred 5 in this embodiment, and the width is 20 mm.
The magnetic gear speed change mechanism 3 is integrally arranged in the inner cavity of the locking nut 4 of the blowing fan, and does not occupy the flow channel space of any axial oil smoke (fluid), so that the increase of the wind resistance in the flow channel can be avoided, and the air draft efficiency of the range hood is reduced.
In the embodiment, by adopting the magnetic gear speed change mechanism 3, the rotation speed increasing conversion from the low-speed motor rotating shaft 7 to the high-speed rotating oil-separating ring 2 is realized in a non-contact manner, and the high-speed rotating oil-separating ring 2 can more efficiently capture and throw away grease particles by virtue of stronger centrifugal force, so that the grease separation rate and the internal cleanness of the range hood are greatly improved. The magnetic gear speed change mechanism 3 is small in size and is integrally arranged in the blast fan locking nut 4, and the oil smoke separation structure does not have a complex multi-layer filtering screen, so that the wind resistance of an oil smoke air channel cannot be increased, and the oil smoke suction efficiency of the range hood can be effectively ensured. More preferably, the rotary oil-separating ring 2 is independently arranged on the outer rotor shell 14 of the magnetic gear speed change mechanism 3, and does not have any mechanical contact with the motor 6, the motor rotating shaft 7 and the blowing fan 5 of the range hood, so that unbalanced disturbance can not be brought, the rotary dynamic balance of the three is influenced, extra work noise of the range hood can not be generated, and the use comfort of a user is improved.
In another embodiment of the present invention, as shown in fig. 1 to 10, a range hood includes: a range hood shell 24 and any one of the magnetic gear variable-speed type oil fume separation structures; the range hood shell 24 covers the outer side of the magnetic gear variable speed type oil smoke separation structure; the range hood shell 24 is provided with an air inlet 2401 corresponding to the rotary oil-isolating ring 2, and the range hood shell 24 is provided with an air outlet 2402 corresponding to the blower.
It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. The utility model provides a magnetic gear variable speed formula oil smoke separation structure which characterized in that includes:
the rotary oil-isolating ring, the magnetic gear speed-changing mechanism, the blowing fan and the motor;
the magnetic gear speed change mechanism comprises an inner rotor assembly, a middle stator assembly and an outer rotor assembly; the middle stator component is arranged between the inner rotor component and the outer rotor component so as to realize the reverse rotation of the outer rotor component and the inner rotor component, and the rotating speed of the outer rotor component is greater than that of the inner rotor component;
the inner rotor assembly and the blowing fan are connected with a motor rotating shaft of the motor, so that the inner rotor assembly, the blowing fan and the motor rotating shaft rotate in the same direction and at the same speed;
the rotary oil-separating ring is connected with the outer rotor assembly so as to enable the rotary oil-separating ring and the outer rotor assembly to rotate in the same direction and at the same speed; the rotary oil-separating ring is arranged behind the blowing fan along the airflow direction.
2. The magnetic gear speed-changing type oil-smoke separation structure of claim 1, wherein:
the inner rotor assembly, the middle stator assembly and the outer rotor assembly are sequentially arranged in the radial direction or the axial direction.
3. The magnetic gear speed-changing type oil-smoke separation structure of claim 2, wherein:
the inner rotor assembly comprises an inner rotor iron core and inner rotor magnetic steel; the inner rotor magnetic steel is formed by circumferentially and sequentially adjacently arranging inner rotor magnetic steel blocks with different polarities and annularly arranging the inner rotor magnetic steel blocks on the outer side of the inner rotor iron core, and the inner rotor magnetic steel is connected with the inner rotor iron core;
the outer rotor assembly comprises an outer rotor iron core, outer rotor magnetic steel and an outer rotor shell; the outer rotor magnetic steel is formed by circumferentially and sequentially arranging outer rotor magnetic steel blocks with different polarities adjacently and annularly arranging the outer rotor magnetic steel blocks on the outer side of the inner rotor magnetic steel, the outer rotor iron core is sleeved on the outer side of the outer rotor magnetic steel and is connected with the outer rotor iron core, the outer rotor shell is sleeved on the outer side of the outer rotor iron core, and the outer rotor shell is connected with the outer rotor iron core; the outer rotor shell is connected with the rotary oil isolating ring;
the middle stator component comprises a modulation ring and a stator support, a plurality of modulation units are arranged on the periphery of the modulation ring, the modulation ring is arranged between the inner rotor magnetic steel and the outer rotor magnetic steel, and the modulation ring is fixed through the stator support.
4. The magnetic gear speed-changing type oil-smoke separation structure according to claim 3, characterized in that:
the outer rotor shell comprises a first annular wall, a second annular wall and a first annular connecting plate, wherein the first annular wall and the second annular wall are sequentially arranged along the axial direction; the first annular wall is disposed adjacent to the rotary oil-separating ring, and the second annular wall is disposed adjacent to the blower fan;
the stator support comprises a third annular wall, a fourth annular wall and a second annular connecting plate, wherein the third annular wall and the fourth annular wall are sequentially arranged along the axial direction; the third annular wall is disposed adjacent to the rotary oil-separating ring, and the fourth annular wall is disposed adjacent to the blower fan;
the outer rotor shell is sleeved on the outer side of the stator support, the first annular wall is sleeved on the outer side of the third annular wall, and a bearing is arranged between the first annular wall and the third annular wall; the first annular connecting plate is connected with the rotary oil-separating ring, and the rotary oil-separating ring is sleeved outside the first annular wall;
the second annular wall is sleeved on the outer side of the fourth annular wall, the fourth annular wall is connected with the modulation ring, and the inner side wall of the second annular wall is connected with the outer rotor iron core;
the third annular wall and the motor rotating shaft are axially arranged oppositely.
5. The magnetic gear speed-changing type oil-smoke separation structure according to claim 3, characterized in that:
the second annular wall is provided with a first limiting part for limiting the outer rotor assembly to axially move towards one side of the rotary oil separating ring; and/or the presence of a gas in the gas,
the first annular wall is provided with a second limiting part for limiting the axial movement of the bearing towards one side of the rotary oil separating ring, the third annular wall is provided with a third limiting part for limiting the axial movement of the bearing towards one side of the blowing fan, and the bearing is clamped between the second limiting part and the third limiting part; and/or the presence of a gas in the gas,
the modulation ring is formed by sequentially axially stacking a plurality of modulation ring sheets; and/or the presence of a gas in the gas,
the distance between the rotary oil-separating ring and the blast fan is not more than 1 mm.
6. The magnetic gear speed change type oil smoke separation structure according to claim 3, further comprising:
the range hood end cover is arranged on one side, far away from the blast fan, of the rotary oil isolating ring; the range hood end cover is connected with the stator support, and the range hood end cover is connected with the range hood shell to fix the stator support and the modulation ring.
7. The magnetic gear speed-changing type oil-smoke separation structure of claim 6, wherein:
the range hood end cover comprises an end cover inner ring, an end cover outer ring and structural ribs; the outer ring of the end cover is sleeved on the outer side of the inner ring of the end cover, the inner ring of the end cover is connected with the outer ring of the end cover through the structural ribs, and the structural ribs are arranged in the circumferential direction.
8. The magnetic gear speed-changing type oil-smoke separation structure of claim 2, wherein:
the inner rotor assembly is arranged close to one side of the blast fan, and the outer rotor assembly is arranged close to one side of the rotary oil-isolating ring;
the inner rotor assembly comprises inner rotor magnetic steel and an inner rotor yoke; the inner rotor magnetic steels with different polarities are circumferentially and sequentially arranged on the surface of one side, close to the middle stator component, of the inner rotor yoke;
the middle stator component comprises a modulation ring and a stator bracket; the modulation ring is fixed through the stator bracket;
the outer rotor component comprises outer rotor magnetic steel and an outer rotor yoke; the outer rotor magnetic steels with different polarities are circumferentially and sequentially arranged on the surface of one side, close to the middle stator assembly, of the outer rotor yoke.
9. The magnetic gear speed change type oil smoke separation structure according to any one of claims 1 to 8, characterized in that:
the blowing fan is connected with the motor rotating shaft through a blowing fan locking nut; the locking nut of the blowing fan comprises a threaded annular wall, a fifth annular wall and a sixth annular wall which are sequentially arranged from inside to outside along the radial direction, a third annular connecting plate used for connecting the threaded annular wall and the fifth annular wall, and a fourth annular connecting plate used for connecting the fifth annular wall and the sixth annular wall; the third annular connecting plate and the fourth annular connecting plate are axially arranged at two ends of the fifth annular wall respectively, the threaded annular wall and the fifth annular wall are arranged on the third annular connecting plate at the same side, the third annular connecting plate is arranged close to the blowing fan, and the fourth annular connecting plate is arranged close to the rotary oil-separating ring; the fifth annular wall and the sixth annular wall are arranged on the same side of the fourth annular connecting plate;
the thread ring wall is in threaded connection with the motor rotating shaft so as to fix the blowing fan on the motor rotating shaft, and the third annular connecting plate and the fifth ring wall are jointly surrounded to form a containing cavity for containing the magnetic gear speed change mechanism.
10. A range hood, comprising: a range hood casing and a magnetic gear variable-speed type oil-smoke separation structure as claimed in any one of claims 1 to 9; the range hood shell is arranged on the outer side of the magnetic gear variable speed type oil fume separation structure; the range hood casing corresponds rotatory oil ring is equipped with the air intake, the range hood casing corresponds the air-blower is equipped with the air outlet.
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| CN112473251B (en) | 2022-06-17 |
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