CN111293814B - End sealing device for air-cooled motor - Google Patents
End sealing device for air-cooled motor Download PDFInfo
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- CN111293814B CN111293814B CN202010226405.2A CN202010226405A CN111293814B CN 111293814 B CN111293814 B CN 111293814B CN 202010226405 A CN202010226405 A CN 202010226405A CN 111293814 B CN111293814 B CN 111293814B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/10—Casings or enclosures characterised by the shape, form or construction thereof with arrangements for protection from ingress, e.g. water or fingers
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/15—Mounting arrangements for bearing-shields or end plates
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
- H02K9/04—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
- H02K9/06—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium with fans or impellers driven by the machine shaft
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- Power Engineering (AREA)
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Abstract
The invention discloses an end sealing device of an air cooling motor, which comprises an end cover, a rotating shaft, a machine shell, a fan cover and a fan, wherein the fan is connected with a positioning ring and an outer protective cylinder, the outer wall of the positioning ring is provided with a positioning ring arc-shaped groove, the end cover is connected with the inner protective cylinder, the inner protective cylinder comprises a first inner ring cylinder and a second inner ring cylinder, the first inner ring cylinder forms a first arc-shaped concave part, the first arc-shaped concave part and the positioning ring arc-shaped groove are matched to form a first ball channel, first balls are filled in the first ball channel, lithium-based lubricating grease is filled between the first balls, the second inner ring cylinder comprises a second arc-shaped concave part, the outer protective cylinder comprises an outer ring cylinder, the outer ring cylinder forms a third arc-shaped concave part, the third arc-shaped concave part and the second arc-shaped concave part are matched to form a second ball channel, and lithium-based lubricating grease. According to the invention, two protections are formed by the first ball and the second ball which are attached with the lithium-based lubricating grease, so that dust and impurities are difficult to enter.
Description
Technical Field
The invention relates to the technical field of motors, in particular to a sealing device for an end part of an air cooling motor.
Background
The fan is covered by the air cooling motor through the fan cover, a small hole for air inlet is formed in the fan cover, a large gap is formed at the joint of the shell and the fan cover, and air enters from the small hole of the fan cover and is blown out from the gap between the shell and the fan cover to blow the radiating fins on the shell.
The motor with the structure has the disadvantages that the small holes of the fan cover, the gap between the shell and the fan cover form a passage for dust and impurities and the like to enter, the dust and impurities can pollute the bearing after entering, the service life of the bearing is reduced, the service life of the motor is finally influenced, and improvement is needed.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides the air-cooled motor end sealing device, two protections are formed by the first ball and the second ball which are attached with lithium-based lubricating grease, dust and impurities are difficult to enter, the sealing protection effect is good, and the service life of the motor is long.
In order to achieve the purpose, the technical scheme of the invention is as follows:
an end sealing device of an air-cooled motor comprises an end cover, a rotating shaft, a casing, a fan cover and a fan, wherein the end cover is fixedly connected to the rear end face of the casing, the rotating shaft penetrates out of the end cover, the part of the rotating shaft exposed out of the end cover is connected with the fan, the outer edge of the rear end of the casing is connected with the fan cover, the fan cover covers the fan, the front end face of the fan is fixedly connected with an annular positioning ring and an outer protective cylinder, the outer wall of the front end of the positioning ring forms a positioning ring convex part with an increased outer diameter, the annular outer wall of the positioning ring convex part is provided with a positioning ring arc-shaped groove, the rear end face of the end cover is fixedly connected with an inner protective cylinder, the inner protective cylinder comprises a first inner cylinder and a second inner cylinder which are concentrically distributed, the first inner cylinder forms a first arc-shaped concave part corresponding to the positioning ring arc-shaped groove, the first ball channel is filled with first balls, lithium-based lubricating grease is filled between adjacent first balls, the second inner ring barrel comprises a second arc-shaped concave part, the concave directions of the second arc-shaped concave part and the first arc-shaped concave part are opposite, the outer protective barrel comprises an outer ring barrel, the outer ring barrel forms a third arc-shaped concave part corresponding to the second arc-shaped concave part, the third arc-shaped concave part and the second arc-shaped concave part are matched to form a second ball channel with an approximate circular cross section, the second ball channel is filled with second balls, and lithium-based lubricating grease is filled between adjacent second balls.
The inner diameter of the second inner ring cylinder is smaller than that of the first inner ring cylinder, the first inner ring cylinder is located on the front side of the second inner ring cylinder, the first inner ring cylinder and the second inner ring cylinder are connected through an inclined transition ring cylinder, and a gap is reserved between the annular inner wall of the first inner ring cylinder and the annular outer wall of the positioning ring convex portion.
The top end of the first arc-shaped concave part is provided with a first through hole in a penetrating mode, the top end of the first arc-shaped concave part is welded with a first annular sleeve, the inner diameter of the first annular sleeve is equal to the diameter of the first through hole, the diameter of the first through hole is larger than that of a first ball, a first sealing cover is screwed into the first annular sleeve in a spiral mode, and the diameter of the first ball is larger than a gap between the annular inner wall of the first inner ring cylinder and the annular outer wall of the convex part of the positioning ring.
The lower end face of the first sealing cover is matched with the inner wall of the first arc-shaped sunken part.
A gap is reserved between the annular inner wall of the outer ring cylinder and the annular outer wall of the second inner ring cylinder, the third arc-shaped concave portion is provided with a second through hole, a second annular sleeve is welded on the third arc-shaped concave portion and faces the second through hole, the inner diameter of the second annular sleeve is equal to the diameter of the second through hole, the diameter of the second through hole is larger than that of a second ball, a second sealing cover is screwed into the second annular sleeve in a spiral mode, and the diameter of the second ball is larger than the gap between the annular inner wall of the outer ring cylinder and the annular outer wall of the second inner ring cylinder.
The end face of the inner side of the second sealing cover is matched with the inner wall of the third arc-shaped sunken part.
The front end of the outer ring cylinder is provided with a bending part which is bent outwards, the bending part is positioned on the periphery of the transition ring cylinder, and a sealing ring is attached between the bending part and the transition ring cylinder.
The annular outer wall of the positioning ring, the front end face of the fan, the inner protection barrel and the outer protection barrel are matched to form a grease cavity between the first ball and the second ball, and lithium-based lubricating grease is filled in the grease cavity.
The outer ring cylinder is provided with an inner filling hole and an outer filling hole which are penetrated through, and the filling holes are communicated with the grease cavity.
The invention has the beneficial effects that: the first ball and the second ball which are attached with the lithium-based lubricating grease form two-way protection, dust and impurities are difficult to enter, the sealing protection effect is good, and the service life of the motor is long; meanwhile, lithium-based lubricating grease is filled in a grease cavity between the first ball and the second ball, so that the protection effect is further enhanced; the invention does not affect the operation of the fan and the heat dissipation of the whole machine when in work.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is an enlarged view taken at A in FIG. 1;
fig. 3 is a schematic structural diagram of a fan according to the present invention.
In the figure: end cap 1, bearing 11, end cap screw hole 12, shaft hole 13, rotating shaft 2, shaft retaining shoulder 21, snap ring 22, casing 3, fan cover 4, fan cover disc part 41, fan cover mounting ring part 42, fan 5, back disc 51, fan blade 52, support ring 53, back disc through hole 54, positioning ring fixing screw 55, back disc screw hole 56, positioning ring 6, positioning ring screw hole 61, positioning ring arc-shaped groove 62, positioning ring convex part 63, inner protection tube 7, first mounting ring 71, first inner ring tube 72, inner fixing screw 73, first arc-shaped concave part 74, transition ring tube 75, second inner ring tube 76, second arc-shaped concave part 77, first through hole 78, first annular sleeve 79, first seal cover 710, outer protection tube 8, second mounting ring 81, outer ring tube 82, outer fixing screw 83, filling hole 84, third arc-shaped concave part 85, bending part 86, second through hole 87, second annular sleeve 88, second seal cover 89, First ball 9, second ball 91, sealing washer 92, grease chamber 93.
Detailed Description
The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings, in the present invention, referring to fig. 1, the left side is the front end, and the right side is the back end.
As shown in fig. 1-3, an end sealing device for an air-cooled motor includes an end cover 1, a rotating shaft 2, a casing 3, a fan housing 4 and a fan 5, where the end cover 1 is fixedly connected to a rear end surface of the casing 3, the rotating shaft 2 penetrates through the end cover 1, and a portion of the rotating shaft 2 exposed outside the end cover 1 is connected to the fan 5, a bearing 11 and a shaft hole 13 are disposed at a center of the end cover 1, the rotating shaft 2 passes through the bearing 11 in an interference fit manner, and the rotating shaft 2 passes through the shaft hole 13 in a clearance fit manner, a shaft shoulder 21 is disposed at a rear end of the rotating shaft 2, a front end of the fan 5 abuts against the shaft shoulder 21, a rear end of the fan 5 is fixed by a snap ring 22, the snap ring 22 is clamped into the rotating shaft 2, the outer edge of the rear end of the casing 3 is connected to the fan housing 4, the fan housing 4 covers the fan, the fan housing disk portion 41 is horizontally opposite to the fan 5 in the front-back direction, a small hole for air intake is formed in the fan housing disk portion 41, when the fan 5 rotates along with the rotating shaft 2, external air is sucked from the small hole in the fan housing disk portion 41, and the air is blown to the radiating fins on the outer wall of the machine shell 3 along the fan housing mounting ring portion 42 for heat radiation, which are the basic common knowledge in the field of motors and are not described in detail herein.
The fan 5 comprises a back disc 51 positioned at the front end, a plurality of fan blades 52 are uniformly distributed on the front end surface of the back disc 51 in the circumferential direction, a support ring 53 is arranged at the center of the front end surface of the back disc 51, the inner diameters of the back disc 51 and the support ring 53 are matched with the outer diameter of the rotating shaft 2 at the corresponding position, the inner edges of the fan blades 52 are connected with the outer edge of the support ring 53, and the outer edges of the fan blades 52 are flush with the outer edge of the back disc 51.
The front end face of the fan 5 is fixedly connected with an annular positioning ring 6 and an outer protection barrel 8, positioning ring screw holes 61 are circumferentially and uniformly distributed on the rear end face of the positioning ring 6, back plate through holes 54 which penetrate through the back plate 51 are circumferentially and uniformly distributed on the back plate 51, the back plate through holes 54 and fan blades 52 are distributed in a staggered mode, the back plate through holes 54 are located on the periphery of the supporting ring 53, and the positioning ring fixing screws 55 penetrate through the back plate through holes 54 and are screwed into the positioning ring screw holes 61 to achieve installation and fixation of the fan 5 and the positioning ring.
Each section of outer protective tube 8 can adopt the welding concatenation to form, outer protective tube 8 includes a second collar 81, the internal diameter of second collar 81 is greater than the external diameter of holding ring 6, the preceding terminal surface circumference equipartition dorsal disk screw 56 of dorsal disk 51, the installation that second collar 81 and dorsal disk 51 were realized to the preceding terminal surface of second collar 81 laminating dorsal disk 51 and pass second collar 81 and twist dorsal disk screw 56 through outer set screw 83 and realize second collar 81 and dorsal disk 51, wherein can also adorn the sealing strip (not drawn in the figure) between second collar 81 and the dorsal disk 51, for example: a groove is formed in the back disc 51, a sealing strip is arranged in the groove, and the second mounting ring 81 is attached to the back disc 51 and then presses the sealing strip to realize sealing of the back disc 51 and the sealing strip.
The outer wall of the front end of the positioning ring 6 forms a positioning ring convex part 63 with the increased outer diameter, the annular outer wall of the positioning ring convex part 63 is provided with a positioning ring arc-shaped groove 62, the rear end face of the end cover 1 is fixedly connected with an inner protection cylinder 7, and all sections of the inner protection cylinder 7 can also be formed by welding connection. The inner protection cylinder 7 comprises a first mounting ring 71, the inner diameter of the first mounting ring 71 is larger than the outer diameter of the positioning ring 6, end cover screw holes 12 are circumferentially and uniformly distributed on the rear end surface of the end cover 1, the first mounting ring 71 is fixed with the end cover 1 by an inner fixing screw 73 penetrating through the first mounting ring 71 and screwed into the end cover screw hole 12, and a sealing strip (not shown in the figure) can be further arranged between the first mounting ring 71 and the end cover 1, for example: a groove is formed in the end cover 1, a sealing strip is arranged in the groove, and the first mounting ring 71 is attached to the end cover 1 and then presses the sealing strip to realize sealing of the end cover 1 and the sealing strip.
The inner protective cylinder 7 comprises a first inner ring cylinder 72 and a second inner ring cylinder 76 which are concentrically distributed, and the front end of the first inner ring cylinder 72 is connected with the inner edge of the first mounting ring 71.
The inner diameter of the second inner ring cylinder 76 is smaller than the inner diameter of the first inner ring cylinder 72, the first inner ring cylinder 72 is located at the front side of the second inner ring cylinder 76, the first inner ring cylinder 72 and the second inner ring cylinder 76 are connected through an inclined transition ring cylinder 75, the diameter of the transition ring cylinder 75 is gradually reduced from the front to the back, and a gap is reserved between the annular inner wall of the first inner ring cylinder 72 and the annular outer wall of the positioning ring protrusion 63.
The first inner ring cylinder 72 forms a first arc-shaped recess 74 corresponding to the positioning ring arc-shaped groove 62, the first arc-shaped recess 74 and the positioning ring arc-shaped groove 62 are matched to form a first ball channel with an approximately circular cross section, the first ball channel is filled with first balls 9, and lithium-based lubricating grease is filled between adjacent first balls 9, the first balls 9 are not used as a means for reducing friction, the first balls 9 are used as carriers for bearing the lithium-based lubricating grease, so that the lithium-based lubricating grease is not easy to run off in the rotation process of the positioning ring 6, and the size of the first balls 9 is smaller than that of the first ball channel with the approximately circular cross section.
The second inner ring 76 includes a second arcuate recess 77, the second arcuate recess 77 being recessed in the opposite direction from the first arcuate recess 74, the second arcuate recess 77 being recessed in the same direction as the retaining ring arcuate slot 62.
The outer protective cylinder 8 comprises an outer ring cylinder 82, and the rear end of the outer ring cylinder 82 is connected with the inner edge of the second mounting ring 81. The outer ring cylinder 82 forms a third arc-shaped recess 85 corresponding to the second arc-shaped recess 77, the third arc-shaped recess 85 and the second arc-shaped recess 77 cooperate to form a second ball channel with an approximately circular cross section, the second ball channel is filled with second balls 91, and lithium-based grease is filled between adjacent second balls 91. The second ball 91 functions exactly as the first ball 9.
First arc depressed part 74's top is equipped with the first through-hole 78 that runs through, and the top welding of first arc depressed part 74 has first annular cover 79, first annular cover 79's internal diameter equals the diameter of first through-hole 78, the diameter of first through-hole 78 is greater than the diameter of first ball 9, and first ball 9 is packed into the back from first annular cover 79 and is passed first through-hole 78 and get into first ball passageway, treats that first ball 9 piles up the back and can inject lithium base grease into first ball passageway for lithium base grease fills up first ball passageway, can synchronous rotation holding ring 6 when injecting lithium base grease, makes lithium base grease be stained with each first ball 9, can stop external dust impurity outside through lithium base grease's the effect of blockking like this, and external dust impurity can not get into bearing 11.
The first annular sleeve 79 is screwed into the first sealing cover 710 in a threaded manner, namely, the inner wall of the first annular sleeve 79 is provided with an internal thread, the outer wall of the rod part of the first sealing cover 710 is provided with an external thread matched with the internal thread, and the head part of the first sealing cover 710 is a head part which can be screwed by an inner hexagonal tool. The lower end surface of the first cover 710 matches with the inner wall of the first arc-shaped recess 74, so that the natural transition of the inner wall of the first arc-shaped recess 74 can be ensured without causing interference to the first ball 9.
The diameter of the first ball 9 is larger than the gap between the annular inner wall of the first inner ring cylinder 72 and the annular outer wall of the positioning ring protrusion 63, so that the first ball 9 does not break away from the first ball channel, the positioning ring 6 can smoothly rotate due to the gap between the annular inner wall of the first inner ring cylinder 72 and the annular outer wall of the positioning ring protrusion 63, and in fact, a gap exists between the whole inner protection cylinder 7 and the positioning ring 6.
A gap is left between the annular inner wall of the outer ring cylinder 82 and the annular outer wall of the second inner ring cylinder 76, and the existence of the gap enables the outer protective cylinder 8 to rotate smoothly.
The third arc-shaped depressed part 85 is provided with a second through hole 87, a second annular sleeve 88 is welded on the third arc-shaped depressed part 85, the second annular sleeve 88 is over against the second through hole 87, the inner diameter of the second annular sleeve 88 is equal to the diameter of the second through hole 87, the diameter of the second through hole 87 is larger than that of the second ball 91, the second ball 91 is loaded from the second annular sleeve 88 and then passes through the second through hole 87 and enters the second ball channel, lithium-based lubricating grease can be injected into the second ball channel after the second ball 91 is fully stacked, so that the second ball channel is fully filled with the lithium-based lubricating grease, and when the lithium-based lubricating grease is injected, relative rotation can be generated between the inner protective cylinder 7 and the outer protective cylinder 8 (the inner protective cylinder 7 is preferentially selected to rotate, the second annular sleeve 88 is ensured to be always positioned at the top end), so that the lithium-based lubricating grease is enabled to be fully adhered to each second ball 91, thus, external dust can be prevented outside through the blocking effect of the lithium, external dust impurities do not enter the bearing 11.
The second annular sleeve 88 is screwed into a second cover 89, and the inner end surface of the second cover 89 is matched with the inner wall of the third arc-shaped recess 85. The second cover 89 functions and is identical to the first cover 710 in structure.
The diameter of the second balls 91 is larger than the gap between the annular inner wall of the outer ring cylinder 82 and the annular outer wall of the second inner ring cylinder 76 so that the second balls 91 do not escape from the second ball passage.
The front end of the outer ring cylinder 82 is provided with a bending part 86 which is bent outwards, the bending part 86 is positioned on the periphery of the transition ring cylinder 75, and a sealing ring 92 is attached between the bending part 86 and the transition ring cylinder 75. In the present invention, an arc-shaped annular small groove may be formed in the outer wall of the transition cylinder 75, and the sealing ring 92 is just inserted into the small groove, so that the sealing ring 92 is reliably mounted, the bent portion 86 is only in contact with the sealing ring 92, and the sealing ring 92 may block the lithium-based grease from locally overflowing (actually, the lithium-based grease overflows very rarely, and even if the lithium-based grease overflows a little, the motor is not affected).
The annular outer wall of the positioning ring 6, the front end face of the fan 5, the inner protection cylinder 7 and the outer protection cylinder 8 are matched to form a grease cavity 93 located between the first ball 9 and the second ball 91, and lithium-based lubricating grease is filled in the grease cavity 93.
The outer ring cylinder 82 is provided with an inner filling hole 84 and an outer filling hole 84, and the inner filling hole 84 is communicated with the grease cavity 93. Lithium-based lubricating grease can be filled into the grease cavity 93 through the filling hole 84, the filling hole 84 can be plugged through a cover after the lithium-based lubricating grease is filled, the filling hole 84 can be provided with threads, and the cover is screwed in to cover the filling hole 84. Lithium-based lubricating grease is injected into the grease cavity 93, so that the region between the first ball 9 and the second ball 91 is protected, and the sealing effect is further improved.
The installation process of the invention is as follows: firstly, the positioning ring 6, the inner protective cylinder 7 and the outer protective cylinder 8 are assembled and put into the first ball 9 and the second ball 91, lithium-based lubricating grease is filled, the first sealing cover 710 and the second sealing cover 89 are covered, then the positioning ring 6, the inner protective cylinder 7 and the outer protective cylinder 8 are installed on the rear end face of the end cover 1 together, and then the fan 5 and the fan cover 4 are installed.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (9)
1. The utility model provides an air-cooled motor tip sealing device, includes end cover (1), pivot (2), casing (3), fan housing (4) and fan (5), end cover (1) fixed connection is at the rear end face of casing (3), end cover (1) and pivot (2) are worn out in pivot (2) and expose part outside end cover (1) and be connected with fan (5), the rear end outer fringe of casing (3) is connected with fan housing (4), including fan housing (4) cover fan (5), its characterized in that: the front end face of the fan (5) is fixedly connected with an annular positioning ring (6) and an outer protective cylinder (8), the outer wall of the front end of the positioning ring (6) forms a positioning ring convex part (63) with the outer diameter increased, the annular outer wall of the positioning ring convex part (63) is provided with a positioning ring arc-shaped groove (62), the rear end face of the end cover (1) is fixedly connected with an inner protective cylinder (7), the inner protective cylinder (7) comprises a first inner ring cylinder (72) and a second inner ring cylinder (76) which are concentrically distributed, the first inner ring cylinder (72) forms a first arc-shaped concave part (74) corresponding to the positioning ring arc-shaped groove (62), the first arc-shaped concave part (74) and the positioning ring arc-shaped groove (62) are matched to form a first ball channel with an approximate circular cross section, the first ball channel is filled with first balls (9), and lithium-based lubricating grease is filled between the adjacent first balls (9), the second inner ring cylinder (76) comprises a second arc-shaped recess (77), the recess directions of the second arc-shaped recess (77) and the first arc-shaped recess (74) are opposite, the outer protection cylinder (8) comprises an outer ring cylinder (82), the outer ring cylinder (82) forms a third arc-shaped recess (85) corresponding to the second arc-shaped recess (77), the third arc-shaped recess (85) and the second arc-shaped recess (77) are matched to form a second ball channel with an approximately circular cross section, the second ball channel is filled with second balls (91), and lithium-based lubricating grease is filled between adjacent second balls (91).
2. The air-cooled motor end seal assembly of claim 1, further comprising: the inner diameter of the second inner ring cylinder (76) is smaller than that of the first inner ring cylinder (72), the first inner ring cylinder (72) is located on the front side of the second inner ring cylinder (76), the first inner ring cylinder (72) is connected with the second inner ring cylinder (76) through an inclined transition ring cylinder (75), and a gap is reserved between the annular inner wall of the first inner ring cylinder (72) and the annular outer wall of the positioning ring convex part (63).
3. The air-cooled motor end sealing device of claim 2, wherein: the top end of the first arc-shaped concave portion (74) is provided with a first through hole (78) which penetrates through the first arc-shaped concave portion, a first annular sleeve (79) is welded at the top end of the first arc-shaped concave portion (74), the inner diameter of the first annular sleeve (79) is equal to the diameter of the first through hole (78), the diameter of the first through hole (78) is larger than that of a first ball (9), the first annular sleeve (79) is screwed into a first sealing cover (710) in a screwing mode, and the diameter of the first ball (9) is larger than a gap between the annular inner wall of the first inner ring barrel (72) and the annular outer wall of the positioning ring convex portion (63).
4. The air-cooled motor end sealing device of claim 3, wherein: the lower end surface of the first cover (710) is matched with the inner wall of the first arc-shaped concave part (74).
5. The air-cooled motor end seal assembly of claim 1, further comprising: a gap is reserved between the annular inner wall of the outer ring cylinder (82) and the annular outer wall of the second inner ring cylinder (76), a second through hole (87) is formed in the third arc-shaped sunken portion (85), a second annular sleeve (88) is welded on the third arc-shaped sunken portion (85), the second annular sleeve (88) is over against the second through hole (87), the inner diameter of the second annular sleeve (88) is equal to the diameter of the second through hole (87), the diameter of the second through hole (87) is larger than that of a second ball (91), a second sealing cover (89) is screwed in the second annular sleeve (88) in a screwing mode, and the diameter of the second ball (91) is larger than the gap between the annular inner wall of the outer ring cylinder (82) and the annular outer wall of the second inner ring cylinder (76).
6. The air-cooled motor end sealing device of claim 5, wherein: the inner side end face of the second sealing cover (89) is matched with the inner wall of the third arc-shaped concave part (85).
7. The air-cooled motor end sealing device of claim 2, wherein: the front end of the outer ring cylinder (82) is provided with a bending part (86) which is bent outwards, the bending part (86) is positioned on the periphery of the transition ring cylinder (75), and a sealing ring (92) is attached between the bending part (86) and the transition ring cylinder (75).
8. The air-cooled motor end seal assembly of claim 1, further comprising: annular outer wall, the preceding terminal surface of fan (5), interior protective barrel (7) and the cooperation of outer protective barrel (8) of holding ring (6) form one and are located grease chamber (93) between first ball (9) and second ball (91), grease chamber (93) intussuseption is filled with lithium base lubricating grease.
9. The air-cooled motor end seal assembly of claim 8, further comprising: the outer ring cylinder (82) is provided with an inner filling hole (84) and an outer filling hole (84) which penetrate through the outer ring cylinder, and the filling hole (84) is communicated with the grease cavity (93).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010226405.2A CN111293814B (en) | 2020-03-26 | 2020-03-26 | End sealing device for air-cooled motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010226405.2A CN111293814B (en) | 2020-03-26 | 2020-03-26 | End sealing device for air-cooled motor |
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| CN111293814A CN111293814A (en) | 2020-06-16 |
| CN111293814B true CN111293814B (en) | 2021-01-12 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP5475606B2 (en) * | 2010-09-30 | 2014-04-16 | 株式会社東芝 | Fully closed main motor |
| US8480385B2 (en) * | 2010-11-25 | 2013-07-09 | Asia Vital Components Co., Ltd. | Waterproof and dustproof fan motor structure and fan using the same |
| JP2017093026A (en) * | 2015-11-02 | 2017-05-25 | 株式会社ミツバ | Method of manufacturing rotor yoke of outer rotor type motor, rotor yoke of outer rotor type motor, outer rotor type motor, and electric fan |
| CN107623403A (en) * | 2016-07-13 | 2018-01-23 | 天津辰宝机电科技有限公司 | A kind of switched reluctance machines applied to instrument field |
| CN107769437A (en) * | 2016-08-15 | 2018-03-06 | 田曼丽 | A kind of Cone-shaped electric machine |
| CN107086701B (en) * | 2017-05-19 | 2018-07-06 | 广东风准电机有限公司 | A kind of waterproof sealing formula motor |
| CN209233627U (en) * | 2018-11-21 | 2019-08-09 | 中达电机股份有限公司 | Level Four flame proof threephase asynchronous |
| CN110707859B (en) * | 2019-09-30 | 2021-12-17 | 荣成市恒力电机有限公司 | Explosion-proof motor that security performance is high |
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