CN111293839B - Sealing device for end part of air cooling motor and installation method of fan - Google Patents
Sealing device for end part of air cooling motor and installation method of fan Download PDFInfo
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- CN111293839B CN111293839B CN202010221588.9A CN202010221588A CN111293839B CN 111293839 B CN111293839 B CN 111293839B CN 202010221588 A CN202010221588 A CN 202010221588A CN 111293839 B CN111293839 B CN 111293839B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/14—Casings; Enclosures; Supports
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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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Abstract
The invention discloses a sealing device at the end part of an air-cooled motor and a fan installation method, wherein the air-cooled motor comprises an end cover, a rotating shaft, the sealing device and the fan, and the installation method comprises the following steps: firstly, a rotating shaft is arranged on an end cover through a bearing and penetrates out of the end cover; secondly, a sealing device is attached to the rear end face of the end cover, the sealing device is positioned on the periphery of the rotating shaft, and the rear end of the rotating shaft exceeds the sealing device; thirdly, a fan is arranged at the rear end of the rotating shaft and is fixedly connected with the sealing device in an attaching mode; the front end face of the fan is fixedly connected with the rear end face of the positioning ring and the rear end face of the outer protective barrel in an attaching mode. The invention achieves good protection effect by additionally arranging the sealing device, and meanwhile, the sealing device does not influence the original structure and performance of the motor.
Description
Technical Field
The invention relates to the technical field of air-cooled motors, in particular to a sealing device at the end part of an air-cooled motor and a fan installation method.
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 a sealing device at the end part of an air cooling motor and a fan mounting method.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a method for installing a sealing device and a fan at the end part of an air-cooled motor comprises an end cover, a rotating shaft, the sealing device and the fan, and the method for installing the air-cooled motor comprises the following steps:
firstly, a rotating shaft is arranged on an end cover through a bearing and penetrates out of the end cover;
secondly, a sealing device is attached to the rear end face of the end cover, the sealing device is positioned on the periphery of the rotating shaft, and the rear end of the rotating shaft exceeds the sealing device; the sealing device comprises an annular positioning ring, an annular inner protective barrel and an annular outer protective barrel which are sequentially distributed from inside to outside, the inner protective barrel is attached to the rear end face of the end cover, the positioning ring is positioned on the inner side of the inner protective barrel at intervals and seals a gap between the positioning ring and the inner protective barrel through first balls which are circumferentially arranged and lithium-based lubricating grease filled on the first balls, the outer protective barrel is positioned on the outer side of the inner protective barrel at intervals and seals the gap between the outer protective barrel and the inner protective barrel through second balls which are circumferentially arranged and lithium-based lubricating grease filled on the second balls;
thirdly, a fan is arranged at the rear end of the rotating shaft and is fixedly connected with the sealing device in an attaching mode; the front end face of the fan is fixedly connected with the rear end face of the positioning ring and the rear end face of the outer protective barrel in an attaching mode.
The front end outer wall of holding ring forms the holding ring convex part of external diameter increase, the annular outer wall of holding ring convex part is equipped with the holding ring arc wall, interior protection section of thick bamboo includes one and the corresponding first arc depressed part of holding ring arc wall, first arc depressed part and the cooperation of holding ring arc wall form the first ball passageway of approximate circular cross-section, the top of first arc depressed part is equipped with the first through-hole that runs through, the diameter of first through-hole is greater than the diameter of first ball, will interior protection section of thick bamboo insert the periphery of holding ring and make the holding ring arc wall aim at first arc depressed part from the back forward during installation, then put into first ball passageway one by one from first through-hole with first ball, fill out lithium base lubricating grease from first through-hole at last.
The top end of the first arc-shaped sunken 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 first annular sleeve is screwed into the first sealing cover in a spiral mode, the first ball enters the first ball channel after sequentially passing through the first annular sleeve and the first through hole, and the first annular sleeve is sealed by screwing the first sealing cover after lithium-based lubricating grease is filled into the first ball channel from the first annular sleeve.
The annular outer wall of the inner protective cylinder is provided with 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 cylinder 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 approximately circular cross section, the third arc-shaped concave part is provided with a through second through hole, the diameter of the second through hole is larger than that of a second ball, the outer protective cylinder is inserted into the periphery of the inner protective cylinder from back to front during installation and enables the third arc-shaped concave part to be aligned to the second arc-shaped concave part, the outer protective cylinder is rotated to enable the second through hole to face upwards, then the second balls are placed into the second ball channel one by one from the second through hole, and finally lithium-based lubricating grease is filled from the second through hole.
And a second annular sleeve is welded on the third arc-shaped sunken part, the second annular sleeve is over against the second through hole, the inner diameter of the second annular sleeve is equal to the diameter of the second through hole, a second seal cover is screwed into the second annular sleeve in a spiral mode, the second ball enters a second ball channel after passing through the second annular sleeve and the second through hole in sequence, and lithium-based lubricating grease is filled into the second ball channel from the second annular sleeve and then is screwed into the second seal cover to seal the second annular sleeve.
The annular outer wall of holding ring, the preceding terminal surface of fan, interior protective barrel and the cooperation of outer protective barrel form one and are located the grease chamber between first ball and the second ball, the grease intracavity is filled has lithium base lubricating grease, outer protective barrel is equipped with the inside and outside hole of annotating that runs through, annotate the hole intercommunication grease chamber.
Interior protective barrel is including the first interior ring section of thick bamboo and the interior ring section of thick bamboo of second that distribute with one heart, the internal diameter of the interior ring section of thick bamboo of second is less than the internal diameter of first interior ring section of thick bamboo, and the transition ring section of thick bamboo through the slope is connected in first interior ring section of thick bamboo and the second, first ball is located first interior ring section of thick bamboo place, leave the clearance between the annular inner wall of first interior ring section of thick bamboo and the annular outer wall of holding ring convex part, the diameter of first ball is greater than the clearance between the annular inner wall of first interior ring section of thick bamboo and the annular outer wall of holding ring convex part.
The second ball is arranged at the position of the second inner ring cylinder, a gap is reserved between the annular inner wall of the outer protection cylinder and the annular outer wall of the second inner ring cylinder, and the diameter of the second ball is larger than the gap between the annular inner wall of the outer protection cylinder and the annular outer wall of the second inner ring cylinder.
The front end of the outer protective 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 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 sealing device is additionally arranged, so that the operation of the fan and the heat dissipation of the whole machine are not influenced, the original structure of the motor is not influenced, and the sealing device is convenient and quick to install.
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, a sealing device for an end portion of an air-cooled motor and a method for installing a fan are provided, the air-cooled motor includes an end cover 1, a rotating shaft 2, a sealing device and a fan 5, the air-cooled motor further includes a casing 3, a fan cover 4 (components of a well-known motor such as a stator and a rotor are omitted here), the specific installation means of the end cover 1, the rotating shaft 2, the casing 3, the fan cover 4 and the fan 5 can refer to the prior art, the end cover 1 is fixedly connected to a rear end surface of the casing 3, a portion of the rotating shaft 2, which penetrates through the end cover 1 and is exposed out of the end cover 1, is connected with the fan 5, a bearing 11 and a shaft hole 13 are arranged in the center of the end cover 1, the rotating shaft 2 passes through the bearing 11 in an interference fit manner and passes through the shaft hole 13 in a clearance fit manner, a shaft shoulder 21 is arranged at a rear, in the pivot 2 is gone into to snap ring 22 card, the rear end outer fringe of casing 3 is connected with fan housing 4, fan housing 4 covers fan 5 including, fan housing 4 includes fan housing disc portion 41 and fan housing installation ring portion 42, fan housing installation ring portion 42 is used for the rear end outer fringe of fixed connection casing 3, wherein fan housing disc portion 41 is relative around with fan 5 level, offer the aperture that is used for the air inlet on fan housing disc portion 41, when fan 5 is rotatory together with pivot 2 with external wind from the aperture on this fan housing disc portion 41 inhale, and dispel the heat with the radiating fin that wind blows casing 3 outer wall along fan housing installation ring portion 42, above these all are the basic general knowledge in motor field, do not describe in detail here.
The mounting method of the present embodiment includes the steps of:
firstly, a rotating shaft 2 is arranged on an end cover 1 through a bearing 11, and the rotating shaft 2 penetrates out of the end cover 1; this is the conventional approach.
Secondly, a sealing device is attached to the rear end face of the end cover 1, the sealing device is positioned on the periphery of the rotating shaft 2, and the rear end of the rotating shaft 2 exceeds the sealing device; the sealing device comprises an annular positioning ring 6, an annular inner protective cylinder 7 and an annular outer protective cylinder 8 which are sequentially distributed from inside to outside, each section of the outer protective cylinder 8 can be formed by welding and splicing, and each section of the inner protective cylinder 7 can also be formed by welding and connecting.
Interior protective barrel 7 laminating is installed in the rear end face of end cover 1, and interior protective barrel 7 includes first collar 71, and the internal diameter of first collar 71 is greater than the external diameter of holding ring 6, and end cover screw hole 12 is evenly distributed to the rear end face circumference of end cover 1, passes first collar 71 and screws in end cover screw hole 12 through interior set screw 73 and realizes that first collar 71 and end cover 1 are fixed, wherein can also adorn the sealing strip (not drawn in the figure) between first collar 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 outer wall of the front end of the positioning ring 6 forms a positioning ring convex part 63 with an 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 inner protection cylinder 7 comprises a first inner ring cylinder 72 and a second inner ring cylinder 76 which are concentrically distributed, 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 positioned at the front side of the second inner ring cylinder 76, and the front end of the first inner ring cylinder 72 is connected with the inner edge of the first mounting ring 71. 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 front to 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 inner protection cylinder 7 comprises 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 approximately circular cross section, the positioning ring 6 is positioned at the inner side of the inner protection cylinder 7 at intervals and seals a gap between the positioning ring 6 and the inner protection cylinder 7 through first balls 9 arranged circumferentially and lithium-based lubricating grease filled on the first balls 9, and the first balls 9 are arranged at the position of the first inner ring cylinder 72, namely the first arc-shaped concave part 74 is arranged on the first inner ring cylinder 72.
The top end of the first arc-shaped recess 74 is provided with a first through hole 78 which penetrates through the first through hole 78, the diameter of the first through hole 78 is larger than that of the first ball 9, the inner protection tube 7 is inserted into the periphery of the positioning ring 6 from back to front during installation, the positioning ring arc-shaped groove 62 is aligned with the first arc-shaped recess 74, then the first ball 9 is placed into the first ball channel one by one from the first through hole 78, the first ball channel is filled with the first ball 9, and finally lithium-based lubricating grease is filled from the first through hole 78, so that the first ball channel is filled with the lithium-based lubricating grease. The positioning ring 6 can be synchronously rotated when lithium grease is injected, so that the lithium grease is enabled to be stained with each first ball 9, external dust and impurities can be prevented from entering the bearing 11 through the blocking effect of the lithium grease.
Lithium grease is filled between the adjacent first balls 9, the first balls 9 are not used as a means for reducing friction, the first balls 9 are used as a carrier for bearing the lithium grease, so that the lithium grease is not easy to lose during the rotation of the positioning ring 6, and the size of the first balls 9 is smaller than that of the first ball channels with the approximately circular cross sections.
The top end of the first arc-shaped concave portion 74 is welded with a first annular sleeve 79, the inner diameter of the first annular sleeve 79 is equal to the diameter of the first through hole 78, the first annular sleeve 79 is screwed into the first sealing cover 710 in a threaded mode, namely, the inner wall of the first annular sleeve 79 is provided with an inner thread, the outer wall of the rod portion of the first sealing cover 710 is provided with an outer thread matched with the outer thread, and the head portion of the first sealing cover 710 is a head portion capable of being screwed through 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 first ball 9 passes through the first annular sleeve 79 and the first through hole 78 in sequence and then enters the first ball passage, and lithium-based grease is filled into the first ball passage from the first annular sleeve 79 and then screwed into the first sealing cover 710 to seal the first annular sleeve 79.
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.
The annular outer wall of the inner protection cylinder 7 is provided with a second arc-shaped concave part 77, the concave directions of the second arc-shaped concave part 77 and the first arc-shaped concave part 74 are opposite, and the concave directions of the second arc-shaped concave part 77 and the positioning ring arc-shaped groove 62 are the same.
The outer protective cylinder 8 forms a third arc-shaped recess 85 corresponding to the second arc-shaped recess 77, the outer protective cylinder 8 includes an outer ring cylinder 82, and the third arc-shaped recess 85 is disposed on the outer ring cylinder 82. 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 outer protective cylinder 8 is positioned at the outer side of the inner protective cylinder 7 at intervals, and a gap between the outer protective cylinder 8 and the inner protective cylinder 7 is sealed by the second balls 91 which are circumferentially arranged and the lithium-based lubricating grease filled on the second balls 91; the second balls 91 are provided at the second inner ring cylinder 76, that is, the second arc-shaped recess 77 is provided at the second inner ring cylinder 76, the third arc-shaped recess 85 and the second arc-shaped recess 77 cooperate to form a second ball passage having an approximately circular cross section, the third arc-shaped recess 85 is provided with a second through hole 87 therethrough, the diameter of the second through hole 87 is larger than that of the second balls 91, the outer shield cylinder 8 is inserted into the inner shield cylinder (7 at the periphery thereof and the third arc-shaped recess 85 is aligned with the second arc-shaped recess 77 from the rear to the front when mounted, the outer shield cylinder 8 is rotated such that the second through hole 87 is directed upward, the second balls 91 are then individually inserted into the second ball passage from the second through hole 87, and finally the lithium-based grease is filled from the second through hole 87 such that the lithium-based grease is filled in the second ball passage, relative rotation between the inner shield cylinder 7 and the outer shield cylinder 8 can be generated when the lithium-based grease is filled (preferably, the inner shield cylinder 7 is rotated, ensuring that the second annular sleeve 88 is always positioned at the top end) to cause the lithium-based grease to be stained with each second ball 91, so that external dust and impurities can be prevented from entering the bearing 11 through the blocking effect of the lithium-based grease.
So that the lithium-based grease is filled between the adjacent second balls 91. The second ball 91 functions exactly as the first ball 9.
A second annular sleeve 88 is welded on the third arc-shaped sunken 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, a second sealing cover 89 is screwed in the second annular sleeve 88 in a screwing manner, and the inner side end surface of the second sealing cover 89 is matched with the inner wall of the third arc-shaped sunken part 85. The second cover 89 functions and is identical to the first cover 710 in structure.
The second balls 91 pass through the second annular sleeve 88 and the second through hole 87 in sequence and then enter the second ball channel, and lithium-based grease is filled into the second ball channel from the second annular sleeve 88 and then screwed into the second sealing cover 89 to seal the second annular sleeve 88.
A gap is reserved between the annular inner wall of the outer protective cylinder 8 and the annular outer wall of the second inner annular cylinder 76, and the diameter of the second ball 91 is larger than the gap between the annular inner wall of the outer protective cylinder 8 and the annular outer wall of the second inner annular cylinder 76. It is practical that 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.
Thirdly, a fan 5 is arranged at the rear end of the rotating shaft 2, and the fan 5 is fixedly connected with the sealing device in an attaching manner; 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 the rear end face of the positioning ring 6 and the rear end face of the outer protective barrel 8 in an attaching mode. Positioning ring screw holes 61 are uniformly distributed on the rear end face of the positioning ring 6 in the circumferential direction, back disc through holes 54 penetrating front and back are uniformly distributed on the back disc 51 in the circumferential direction, the back disc through holes 54 and the fan blades 52 are distributed in a staggered mode, the back disc through holes 54 are located on the periphery of the supporting ring 53, and the positioning ring fixing screws 55 penetrate through the back disc through holes 54 and are screwed into the positioning ring screw holes 61 to realize the installation and fixation of the fan 5 and the positioning ring 6.
The outer protective cylinder 8 comprises a second mounting ring 81, the rear end of the outer cylinder 82 is connected with the inner edge of the second mounting ring 81, the inner diameter of the second mounting ring 81 is larger than the outer diameter of the positioning ring 6, the back plate screw holes 56 are uniformly distributed on the front end surface of the back plate 51 in the circumferential direction, the second mounting ring 81 is attached to the front end surface of the back plate 51, the second mounting ring 81 passes through the second mounting ring 81 through the outer fixing screw 83 and is screwed into the back plate screw holes 56 to realize the mounting of the second mounting ring 81 and the back plate 51, wherein a sealing strip (not shown in the figure) can be further mounted between the second mounting ring 81 and the back plate 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 annular outer wall of holding ring 6, the preceding terminal surface of fan 5, interior protective barrel 7 and the cooperation of outer protective barrel 8 form one and are located a grease chamber 93 between first ball 9 and the second ball 91, the grease intracavity 93 intussuseption is filled with lithium base lubricating grease, outer protective barrel 8 is equipped with the interior outer filling hole 84 that runs through, fill and annotate hole 84 intercommunication grease chamber 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 front end of the outer protective cylinder 8 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 installation process of the sealing device of the invention is as follows: with reference to fig. 2, inserting the positioning rings 6 into the inner protective cylinder 7 from right to left, aligning the positioning ring arc-shaped grooves 62 with the first arc-shaped recesses 74, placing the first balls 9 one by one along the first annular sleeve 79, starting to inject the lithium-based grease from the first annular sleeve 79 when the first ball channels are filled with the first balls 9, keeping the first annular sleeve 79 facing upward and rotating the positioning rings 6 when the lithium-based grease is injected, so as to enable the lithium-based grease to be fully filled, and screwing the first sealing cover 710 after the lithium-based grease is completely injected, so as to complete the fitting of the positioning rings 6 and the inner protective cylinder 7; then the outer protective barrel 8 is inserted into the outer protective barrel 7 from right to left, the third arc-shaped concave part 85 is aligned with the second arc-shaped concave part 77, the second annular sleeve 88 is kept upward, the second balls 91 are placed along the second annular sleeve 88 one by one, when the second ball channel is filled with the second balls 91, lithium-based lubricating grease is injected from the second annular sleeve 88, the second annular sleeve 88 is kept upward when the lithium-based lubricating grease is injected, the inner protective barrel 7 is rotated, the lithium-based lubricating grease can be fully injected, and the second sealing cover 89 is screwed after the lithium-based lubricating grease is injected, so that the outer protective barrel 8 and the inner protective barrel 7 are matched and installed; 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, wherein the inner fixing screw 73 penetrates through the first installation ring 71 and is screwed into the end cover screw hole 12, then the fan 5 is inserted into the rotating shaft 2 from the right to the left until the fan 5 abuts against the shaft stop shoulder 21, and the outer fixing screw 83 and the positioning ring fixing screw 55 are screwed to realize the fixing of the rear end of the sealing device.
In the installation process of the sealing device, the outer protective cylinder 8 and the inner protective cylinder 7 can be installed in a matched mode firstly, and then the positioning ring 6 and the inner protective cylinder 7 can be installed in a matched mode.
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. A sealing device at the end part of an air cooling motor and a fan mounting method are characterized in that: the air-cooled motor comprises an end cover (1), a rotating shaft (2), a sealing device and a fan (5), and the installation method comprises the following steps:
firstly, a rotating shaft (2) is arranged on an end cover (1) through a bearing (11), and the rotating shaft (2) penetrates out of the end cover (1);
secondly, a sealing device is attached to the rear end face of the end cover (1), the sealing device is positioned on the periphery of the rotating shaft (2), and the rear end of the rotating shaft (2) exceeds the sealing device; the sealing device comprises an annular positioning ring (6), an annular inner protective cylinder (7) and an annular outer protective cylinder (8) which are sequentially distributed from inside to outside, wherein the inner protective cylinder (7) is attached to the rear end face of the end cover (1), the positioning ring (6) is positioned on the inner side of the inner protective cylinder (7) at intervals, a gap between the positioning ring (6) and the inner protective cylinder (7) is sealed by first balls (9) which are circumferentially arranged and lithium-based lubricating grease filled on the first balls (9), the outer protective cylinder (8) is positioned on the outer side of the inner protective cylinder (7) at intervals, and a gap between the outer protective cylinder (8) and the inner protective cylinder (7) is sealed by second balls (91) which are circumferentially arranged and lithium-based lubricating grease filled on the second balls (91);
thirdly, a fan (5) is arranged at the rear end of the rotating shaft (2) and the fan (5) is fixedly connected with the sealing device in an attaching mode; the front end face of the fan (5) is fixedly connected with the rear end face of the positioning ring (6) and the rear end face of the outer protective barrel (8) in an attaching mode.
2. The method for installing the sealing device and the fan at the end part of the air-cooled motor according to claim 1, wherein the sealing device comprises: 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 inner protective cylinder (7) comprises 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 approximately circular cross section, the top end of the first arc-shaped concave part (74) is provided with a through first through hole (78), the diameter of the first through hole (78) is larger than that of the first ball (9), the inner protective cylinder (7) is inserted into the periphery of the positioning ring (6) from back to front during installation, the positioning ring arc-shaped groove (62) is aligned to the first arc-shaped concave part (74), and then the first balls (9) are placed into the first ball channel one by one from the first through hole (78, finally, the first through hole (78) is filled with lithium grease.
3. The method for installing the sealing device and the fan at the end part of the air-cooled motor according to claim 2, wherein the sealing device comprises: the top end of the first arc-shaped concave portion (74) is welded with a first annular sleeve (79), the inner diameter of the first annular sleeve (79) is equal to the diameter of the first through hole (78), the first annular sleeve (79) is screwed into the first sealing cover (710), the first ball (9) sequentially passes through the first annular sleeve (79) and the first through hole (78) and then enters the first ball channel, and lithium-based lubricating grease is filled into the first ball channel from the first annular sleeve (79) and then is screwed into the first sealing cover (710) to seal the first annular sleeve (79).
4. The method for installing the sealing device and the fan at the end part of the air-cooled motor according to claim 2, wherein the sealing device comprises: the annular outer wall of the inner protection barrel (7) is provided with a second arc-shaped concave part (77), the concave directions of the second arc-shaped concave part (77) and the first arc-shaped concave part (74) are opposite, the outer protection barrel (8) forms a third arc-shaped concave part (85) corresponding to the second arc-shaped concave part (77), the third arc-shaped concave part (85) and the second arc-shaped concave part (77) are matched to form a second ball channel with an approximate circular cross section, the third arc-shaped concave part (85) is provided with a through second through hole (87), the diameter of the second through hole (87) is larger than that of the second ball (91), the outer protection barrel (8) is inserted into the periphery of the inner protection barrel (7) from back to front during installation, the third arc-shaped concave part (85) is aligned to the second arc-shaped concave part (77), and the outer protection barrel (8) is rotated to enable the second through hole (87) to face upwards, then, the second balls (91) are placed one by one in the second ball passage through the second through holes (87), and finally, the lithium-based grease is filled from the second through holes (87).
5. The method for installing the sealing device and the fan at the end part of the air-cooled motor according to claim 4, wherein the sealing device comprises: a second annular sleeve (88) is welded on the third arc-shaped concave portion (85), the second annular sleeve (88) is opposite to 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), a second sealing cover (89) is screwed into the second annular sleeve (88) in a threaded mode, second balls (91) sequentially pass through the second annular sleeve (88) and the second through hole (87) and then enter a second ball channel, and lithium-based lubricating grease is filled into the second ball channel from the second annular sleeve (88) and then is screwed into the second sealing cover (89) to seal the second annular sleeve (88).
6. The method for installing the sealing device and the fan at the end part of the air-cooled motor according to claim 1, wherein the sealing device comprises: the front end face of the annular outer wall of the positioning ring (6), the fan (5), the inner protective cylinder (7) and the outer protective cylinder (8) are matched to form a grease cavity (93) located between the first ball (9) and the second ball (91), lithium-based lubricating grease is filled in the grease cavity (93), the outer protective cylinder (8) is provided with a filling hole (84) which is penetrated through from inside to outside, and the filling hole (84) is communicated with the grease cavity (93).
7. The method for installing the sealing device and the fan at the end part of the air-cooled motor according to claim 2, wherein the sealing device comprises: the inner protection cylinder (7) comprises a first inner ring cylinder (72) and a second inner ring cylinder (76) which are concentrically distributed, 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 connected with the second inner ring cylinder (76) through an inclined transition ring cylinder (75), the first ball (9) is arranged at the position of the first inner ring cylinder (72), 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), and 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 convex part (63).
8. The method for installing the sealing device and the fan at the end part of the air-cooled motor according to claim 7, wherein the sealing device comprises: the second ball (91) is arranged at the position of the second inner ring cylinder (76), a gap is reserved between the annular inner wall of the outer protective cylinder (8) and the annular outer wall of the second inner ring cylinder (76), and the diameter of the second ball (91) is larger than the gap between the annular inner wall of the outer protective cylinder (8) and the annular outer wall of the second inner ring cylinder (76).
9. The method for installing the sealing device and the fan at the end part of the air-cooled motor according to claim 8, wherein the sealing device comprises: the front end of the outer protective cylinder (8) 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).
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| CN202010221588.9A CN111293839B (en) | 2020-03-26 | 2020-03-26 | Sealing device for end part of air cooling motor and installation method of fan |
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| CN202010221588.9A CN111293839B (en) | 2020-03-26 | 2020-03-26 | Sealing device for end part of air cooling motor and installation method of fan |
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| CN111293839B true CN111293839B (en) | 2021-01-12 |
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| CN107769437A (en) * | 2016-08-15 | 2018-03-06 | 田曼丽 | A kind of Cone-shaped electric machine |
| CN206850567U (en) * | 2017-04-20 | 2018-01-05 | 深圳市爱贝科精密机械有限公司 | A kind of waterproof and dustproof structure for ball electric spindle |
| JP6600667B2 (en) * | 2017-08-04 | 2019-10-30 | 東芝三菱電機産業システム株式会社 | Rotating electric machine and communication structure |
| CN208316470U (en) * | 2018-06-05 | 2019-01-01 | 常州安科特电机有限公司 | A kind of brake motor with dust cover |
| CN108900031A (en) * | 2018-07-11 | 2018-11-27 | 张明明 | A kind of low vibration motor of low noise |
| CN209233627U (en) * | 2018-11-21 | 2019-08-09 | 中达电机股份有限公司 | Level Four flame proof threephase asynchronous |
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