CN117833536A - Motor shaft sealing structure and motor - Google Patents
Motor shaft sealing structure and motor Download PDFInfo
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- CN117833536A CN117833536A CN202311619124.3A CN202311619124A CN117833536A CN 117833536 A CN117833536 A CN 117833536A CN 202311619124 A CN202311619124 A CN 202311619124A CN 117833536 A CN117833536 A CN 117833536A
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- 238000007789 sealing Methods 0.000 title claims abstract description 57
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 139
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 94
- 239000010439 graphite Substances 0.000 claims abstract description 94
- 230000006835 compression Effects 0.000 claims abstract description 14
- 238000007906 compression Methods 0.000 claims abstract description 14
- 230000000149 penetrating effect Effects 0.000 claims abstract description 10
- 238000003825 pressing Methods 0.000 claims description 79
- 210000004907 gland Anatomy 0.000 claims description 20
- 238000001816 cooling Methods 0.000 abstract description 2
- 230000003211 malignant effect Effects 0.000 abstract description 2
- 230000002093 peripheral effect Effects 0.000 description 10
- 238000005299 abrasion Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- 230000017525 heat dissipation Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 208000002925 dental caries Diseases 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- Sealing Devices (AREA)
Abstract
The invention discloses a motor shaft sealing structure and a motor, wherein the motor shaft sealing structure is used for sealing a rotating shaft of the motor, and comprises the following components: the end cover is arranged on the outer side of the rotating shaft in a penetrating mode, and an outer cavity is formed in the end cover around the rotating shaft; the shaft sleeve is sleeved on the rotating shaft and is positioned in the outer cavity; the graphite piece is arranged on the periphery of the shaft sleeve in a surrounding mode; and the compression assembly is arranged on the end cover so as to cover the outer cavity and is used for compressing the graphite piece axially and radially. According to the invention, the graphite piece is utilized to realize rotary sealing, and the cooling efficiency of the motor can be improved, the mechanical loss of the motor is reduced, the malignant influence of shaft current is eliminated, the performance of the motor is integrally improved, and the integral waterproof sealing of the motor is ensured.
Description
Technical Field
The invention relates to the technical field of motors, in particular to a motor shaft sealing structure and a motor.
Background
The shaft end of the motor is difficult to seal due to the rotation of the motor shaft. The motor has very big damage risk when working under comparatively adverse conditions such as external environment humidity is big, dust is big, and outside impurity such as sand soil or water gets into inside the motor and can corrode the inside metal parts of motor, seriously influences motor performance, probably takes place the motor phenomenon of burning down even. In the shaft end sealing structure of rotary motion, a packing seal, an oil seal and a lip-shaped sealing ring are generally adopted for sealing. At present, the mainstream waterproof seal in industry is through installing the oil blanket to the position of running through, but use the waterproof method of this kind of use oil blanket can cause the cost increase of certain degree owing to be limited to the life of oil blanket, simultaneously because the lip hardness of oil blanket is big, also harm the main shaft of being connected with it easily, leads to the pivot wearing and tearing great, the loss increases.
Disclosure of Invention
The embodiment of the invention provides a motor shaft sealing structure and a motor, and aims to solve the problem that an existing motor adopts an oil seal mode to cause great abrasion of a rotating shaft.
The invention provides a motor shaft sealing structure, which is used for sealing a rotating shaft of a motor and comprises the following components: an end cover, a shaft sleeve, a graphite piece and a compression assembly,
the end cover is arranged on the outer side of the rotating shaft in a penetrating way, and an outer cavity is formed in the end cover around the rotating shaft;
the shaft sleeve is sleeved on the rotating shaft and is positioned in the outer cavity;
the graphite piece is arranged on the periphery of the shaft sleeve in a surrounding mode;
and the compression assembly is arranged on the end cover so as to cover the outer cavity and is used for compressing the graphite piece axially and radially.
In the motor shaft sealing structure provided by the invention, the pressing assembly comprises the pressing cover and the pressing plate, the pressing cover is fixedly arranged on the end cover and covers the outer cavity, the pressing plate is arranged on one side of the pressing cover facing the outer cavity, and one side of the pressing plate facing away from the pressing cover presses the axial front end of the graphite piece.
In the motor shaft sealing structure provided by the invention, the pressing plate comprises an end plate and a side plate, wherein the end plate is arranged between the pressing cover and the axial front end of the graphite piece, and the side plate extends from the radial edge of the end plate to the radial edge of the graphite piece in a direction away from the pressing cover so as to press the radial direction of the graphite piece.
In the motor shaft sealing structure provided by the invention, the pressing assembly further comprises a pre-tightening piece and an elastic piece, wherein the pre-tightening piece is arranged in the gland in a penetrating way, one end of the elastic piece is abutted against the pre-tightening piece, and the other end of the elastic piece is abutted against the pressing plate; the pre-tightening piece is movably locked along the axial direction of the rotating shaft so as to adjust the pre-tightening force applied to the pressing plate.
In the motor shaft sealing structure provided by the invention, the gland is provided with the threaded hole, the pre-tightening piece is a locking bolt, and the locking bolt is in threaded locking with the threaded hole.
In the motor shaft sealing structure provided by the invention, the pressing assembly further comprises a fixing bolt, and the fixing bolt penetrates through the gland and is fixedly connected with the end cover.
In the motor shaft sealing structure provided by the invention, the motor shaft sealing structure further comprises a bearing, an inner cavity is formed in the end cover, the inner cavity is arranged on one side of the outer cavity away from the end cover, and the bearing is arranged on the outer side of the rotating shaft in a penetrating manner and is contained in the inner cavity.
In the motor shaft sealing structure provided by the invention, the graphite piece is the first graphite ring, the outer periphery of the shaft sleeve is provided with the outer periphery, the first graphite ring is sleeved on the outer periphery of the shaft sleeve, the compression assembly compresses the axial front end of the first graphite ring, and the axial rear end of the first graphite ring is compressed on the outer periphery.
In the motor shaft sealing structure provided by the invention, the graphite piece is a second graphite ring, the outer periphery of the shaft sleeve is provided with an outer periphery, the second graphite ring is sleeved on the outer periphery, the second graphite ring comprises a front end face ring, a rear end face ring and a side face ring, and the front end face ring, the rear end face ring and the side face ring are respectively arranged at the axial front end, the axial rear end and the radial outer periphery of the outer periphery in a surrounding mode.
The invention also provides a motor, which comprises the motor shaft sealing structure.
The invention provides a motor shaft sealing structure and a motor, wherein the motor shaft sealing structure comprises an end cover, a shaft sleeve, a graphite piece and a pressing component, the shaft penetrates through the end cover, an outer cavity is arranged in the end cover, the shaft sleeve is arranged in the outer cavity and sleeved on the shaft and synchronously rotates along with the shaft, the graphite piece is sleeved on the shaft sleeve, the pressing component covers the outer cavity, and simultaneously compresses the graphite piece axially and radially, so that the graphite piece is tightly combined with the shaft sleeve, the shaft sleeve synchronously rotates along with the rotation of the shaft when the shaft rotates, and the graphite piece is compressed on the shaft sleeve, thereby realizing rotary sealing, and the graphite piece has good self-lubricity, has frictional resistance smaller than an oil seal, and can properly improve motor noise and motor energy consumption; meanwhile, as the graphite piece has good heat dissipation capacity, heat caused by part of motor rotors can be conducted out; and graphite has good electric conductivity, and the structure can conduct the shaft current generated by the motor to the outside, so that the influence of the shaft current is avoided, and the service life and the reliability of the motor can be further improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic cross-sectional view of a motor shaft seal structure according to an embodiment of the present invention;
FIG. 2 is an enlarged view of the portion A of FIG. 1
FIG. 3 is a schematic cross-sectional view of a motor shaft seal structure according to another embodiment of the present invention;
fig. 4 is an enlarged view of a portion B of fig. 3;
FIG. 5 is an exploded view of a motor shaft seal assembly according to an embodiment of the present invention;
FIG. 6 is a schematic view of a platen of a motor shaft seal structure according to an embodiment of the present invention;
FIG. 7 is a schematic view of a shaft sleeve of a motor shaft seal structure according to an embodiment of the present invention;
FIG. 8 is a schematic view of an end cap of a motor shaft seal structure according to an embodiment of the present invention;
description of the drawings:
1. an end cap; 11. an outer cavity; 12. an inner cavity;
2. a shaft sleeve; 21. an outer peripheral edge;
3. a graphite member; 31. a first graphite ring; 32. a second graphite ring; 321. a front face ring; 322. a rear face ring; 323. a side ring;
4. a compression assembly; 41. a gland; 42. a pressing plate; 421. an end panel; 422. a side panel; 43. a pretension member; 44. an elastic member; 45. a fixing bolt;
5. a bearing;
6. a rotating shaft.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The terms of directions used in the present invention, such as "up", "down", "front", "back", "left", "right", "inside", "outside", "side", etc., refer only to the directions of the attached drawings. Accordingly, directional terminology is used to describe and understand the invention and is not limiting of the invention. In addition, in the drawings, structures similar or identical to those of the drawings are denoted by the same reference numerals.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
The common sealing scheme in the current motor scheme is that the oil seal is installed at the penetrating position of the output end of the rotating shaft and the end cover, the oil seal plays the role of isolating the inner cavity and the outer cavity, the oil seal is attached to the rotating shaft, lubricating grease is coated on one side of the oil seal during installation, the tightness of the inner cavity and the outer cavity of the motor can be ensured, but the mechanical loss is also relatively large because of poor heat conductivity and high hardness of the oil seal, the oil seal is in contact with the rotating shaft for a long time, the contact surface of the rotating shaft is easy to be worn, the contact surface of the rotating shaft and the oil seal is easy to be in clearance, the tightness of the oil seal is further invalid, and if the working condition is bad, the motor is easy to enter impurities and water, so that the motor is damaged.
According to the motor shaft sealing structure, the problem that the rotating shaft is abraded in an oil sealing mode in the existing motor is solved, the rotating sealing is achieved through the graphite piece, and the abrasion of the rotating shaft is greatly reduced due to the fact that the good self-lubricity of the graphite piece is utilized, and the friction resistance of the graphite piece is smaller than that of the oil sealing.
The embodiment of the invention aims to solve the problem of the abrasion of the rotating shaft, and the technical scheme is as follows:
the method comprises the specific solution that a shaft sleeve is used for sleeving a rotating shaft, the shaft sleeve synchronously rotates along with the rotating shaft, the shaft sleeve is positioned in an outer cavity of an end cover, a graphite piece is annularly arranged on the periphery of the shaft sleeve, the outer cavity is covered on the outer cavity through a pressing component cover, and meanwhile, the graphite piece is respectively pressed by the pressing component in the axial direction and the radial direction of the graphite piece, so that the graphite piece is tightly combined with the shaft sleeve; and the graphite piece has good electric conduction capacity, and the structure can conduct shaft current generated by the motor to the outside, so that the influence of the shaft current is avoided, and the service life of the motor can be further prolonged.
In order to better understand the above technical solutions, the following detailed description will refer to the accompanying drawings and specific embodiments.
Referring to fig. 1 to 8, fig. 1 is a schematic cross-sectional view of a motor shaft sealing structure provided in an embodiment of the present invention, and the embodiment of the present invention provides a motor shaft sealing structure for sealing a rotating shaft 6 of a motor, where the motor shaft sealing structure includes: the end cover 1 is arranged on the outer side of the rotating shaft 6 in a penetrating mode, and an outer cavity 11 is formed in the end cover 1 around the rotating shaft 6; the shaft sleeve 2 is sleeved on the rotating shaft 6 and is positioned in the outer cavity 11; a graphite member 3 disposed around the outer periphery of the sleeve 2; the compressing assembly 4 is arranged on the end cover 1 to cover the outer cavity 11, and the compressing assembly 4 is used for compressing the graphite piece 3 axially and radially.
Referring to fig. 1 to 5, specifically, for ease of understanding, further referring to fig. 1 and 3, an axial front end and an axial rear end in the present application are explained with reference to a rotating shaft 6 of the motor, the axial front end being an end of the rotating shaft 6 which is directed toward the outside of the motor in the axial direction, and the axial rear end being an end of the rotating shaft 6 which is directed toward the inside of the motor in the axial direction. Corresponding shaft holes are formed in the end cover 1, the shaft sleeve 2, the graphite piece 3 and the compression assembly 4, and the rotating shaft 6 penetrates through the components. The inside of end cover 1 is provided with two cavitys, is outer cavity 11 and interior cavity 12 respectively, and outer cavity 11 is used for placing axle sleeve 2 and graphite spare 3, and interior cavity 12 is used for placing bearing 5. The shaft sleeve 2 is in interference fit with the rotating shaft 6, the shaft sleeve 2 is sleeved into the rotating shaft 6 through heating expansion, the shaft sleeve 2 and the rotating shaft 6 rotate together when the motor works, and the shaft sleeve 2 penetrates out of the outer cavity 11. The graphite piece 3 is annular and sleeved on the periphery of the shaft sleeve 2. The compressing component 4 has two functions, namely, the end cover 1 serving as the outer cavity 11 is used on one hand, the compressing component 4 is fixed on the end cover 1, and the outer cavity 11 is covered at the same time; the function of the other hand is to compress the graphite member 3, but also from both directions. Specifically, the pressing assembly 4 applies pressure to the axial front end of the graphite member 3, ensuring tight pressing of the graphite member 3 in the axial direction; at the same time, the compression assembly 4 also applies pressure to the radial edge of the graphite member 3, thereby sufficiently fixing the graphite member 3 in the radial direction so as to be closely adhered to the sleeve 2. In this way, a gap-free seal is formed between the graphite member 3 and the sleeve 2, effectively closing the gap therebetween. This design prevents foreign matter from entering the outer chamber 11, and achieves the function of rotary sealing. The rotary sealing structure has high reliability, good sealing performance and long service life, and is suitable for high sealing requirements.
The structure of the pressing assembly 4 may be various, as long as it can press the graphite member 3 in the axial direction and the radial direction of the graphite member 3, and is not limited herein.
According to the embodiment, a traditional oil seal structure is replaced, the device is simple and easy to install, the cost of parts is low, the whole service life of the motor can be prolonged, the friction resistance of the graphite piece 3 is smaller than that of an oil seal due to the good self-lubricating property of the graphite piece, the noise and the energy consumption of the motor can be properly improved, and meanwhile, the graphite piece 3 has good heat dissipation capacity, the heat caused by part of a motor rotor can be led out, and the energy consumption of the motor is further improved; on the other hand, the graphite piece 3 with the structure has good electric conduction capacity, so that the influence of shaft current generated by the motor can be solved, and the service life of the motor is further prolonged.
In an embodiment, the pressing assembly 4 includes a pressing cover 41 and a pressing plate 42, the pressing cover 41 is fixedly arranged on the end cover 1 and covers the outer cavity 11, the pressing plate 42 is arranged on one side of the pressing cover 41 facing the outer cavity 11, and the pressing plate 42 presses the axial front end of the graphite member 3 on the side facing away from the pressing cover 41. Specifically, the pressing assembly 4 is composed of two parts, one is a pressing cover 41 for fixing with the end cap 1, and the other is a pressing plate 42 for pressing the graphite member 3. The edge portion of the pressing cover 41 is fixed to the end cap 1, and the middle portion of the pressing cover 41 covers the outer cavity 11. The gland 41, the pressure plate 42 and the graphite member 3 are arranged in sequence from outside to inside. Specifically, the axial front end of the pressing plate 42 is closely fitted to the pressing cover 41, and the axial rear end of the pressing plate 42 is closely fitted to the graphite member 3. Then, after the gland 41 is fixed with the end cover 1, pressure is applied to the pressing plate 42, and the pressure is transferred to the graphite piece 3 through the pressing plate 42, so that the axial compression of the graphite piece 3 is realized, the gap between the graphite piece 3 and the shaft sleeve 2 in the axial direction is eliminated, and good sealing is ensured.
Referring to fig. 6, in the present embodiment, the pressing plate 42 includes an end plate 421 and a side plate 422, the end plate 421 is disposed between the pressing cover 41 and the axial front end of the graphite member 3, and the side plate 422 extends from the radial edge of the end plate 421 to the radial edge of the graphite member 3 in a direction away from the pressing cover 41 to press the graphite member 3 in the radial direction. Specifically, the platen 42 is a cover structure that includes an end plate 421 and side plates 422, the side plates 422 being perpendicular to the end plate 421 when viewed in cross section, the end plate 421 being located on either side of the end plate 421. During assembly, the pressing plate 42 is covered on the axial front end of the graphite piece 3, the end plate 421 is located between the pressing cover 41 and the graphite piece 3, the end plate 421 is in contact with the axial front end of the graphite piece 3, the side plate 422 is located between the inner side wall of the cavity and the graphite piece 3, and the inner side of the side plate 422 is in contact with the radial edge of the graphite piece 3. Then, when the gland 41 is fixed to the end cap 1, a pressure is applied to the pressing plate 42, the pressure is transmitted to the axial front end of the graphite member 3 through the end plate 421, the end plate 421 is tightly fitted to the axial front end of the graphite member 3, the side plate 422 is tightly fitted to the radial edge of the graphite member 3, and the side plate 422 is tightly fitted to the radial edge of the graphite member 3. In addition, through the size design, can also make the outside of side board 422 and the inside wall laminating of cavity, further compress tightly the radial edge of graphite spare 3.
Referring to fig. 2 and 4, in an embodiment, the compressing assembly 4 further includes a pre-tightening member 43 and an elastic member 44, where the pre-tightening member 43 is disposed in the gland 41 in a penetrating manner, one end of the elastic member 44 abuts against the pre-tightening member 43, and the other end of the elastic member 44 abuts against the pressing plate 42; wherein the pre-tightening member 43 is movably locked along the axial direction of the rotating shaft 6 to adjust the pre-tightening force applied to the pressing plate 42. Since the graphite member 3 is worn out to some extent after the motor is operated for a long period of time, a gap is formed between the graphite member 3 and the sleeve 2. In order to prevent the influence of the gap caused by abrasion, the present embodiment provides a greater pre-tightening force by the cooperation of the pre-tightening member 43 and the elastic member 44, so as to ensure that the seal does not fail. Specifically, the pretensioner 43 is inserted into the gland 41 in the axial direction of the gland 41, and the pretensioner 43 is movable locked in the axial direction of the gland 41, that is, the pretensioner 43 is movable to a certain position in the axial direction of the gland 41 and is locked. The elastic member 44 is a spring, and both ends of the spring are respectively in contact with the pretensioner 43 and the pressing plate 42. When the graphite member 3 is worn to generate a gap, the pretensioner 43 is adjusted to move toward the direction of the spring, and is locked when the pretensioner 43 moves to a proper position, the pretensioner 43 compresses the spring, and the spring abuts against the pressing plate 42, so that the spring presses the graphite member 3 under pressure to eliminate the gap. In this embodiment, the axial position of the pre-tightening piece 43 is adjusted to provide a pre-tightening force, and the pre-tightening force is transmitted to the graphite piece 3 through the spring and the pressing plate 42, so that the graphite piece 3 and the shaft sleeve 2 are always tightly combined.
The movable locking structure of the pre-tightening member 43 may be any structure, as long as it can lock the pre-tightening member 43 to a certain position in the axial direction, and is not limited herein.
Preferably, the gland 41 is provided with a threaded hole, and the pretensioner 43 is a locking bolt, and the locking bolt is screwed and locked with the threaded hole. Specifically, the screw hole runs through gland 41, the screw hole has the internal thread, the locking bolt has the external screw thread, the spring is arranged in the screw hole, the one end butt locking bolt's tip of spring, the other end butt clamp plate 42 of spring, the external screw thread of locking bolt and the internal screw thread cooperation of screw hole, rotatory locking bolt makes locking bolt remove towards the spring, the gradual compression spring, after adjusting suitable pretightning force, stop rotatory locking bolt, the locking bolt lock, the pretightning force that is provided by the locking bolt is passed through the spring, clamp plate 42 is on the graphite spare 3, thereby eliminate the clearance, make graphite ring and axle sleeve 2 remain closely combining throughout.
Referring to fig. 1 and 3, in the present embodiment, the compression assembly 4 further includes a fixing bolt 45, and the fixing bolt 45 is fixedly connected to the end cap 1 through the gland 41. Specifically, the pressing cover 41 includes a middle portion that covers the outer cavity 11 and an edge portion for fixing with the end cap 1. Screw holes are formed near the edge of the end cover 1, and fixing bolts 45 penetrate through the edge part of the gland 41 to be matched and locked with the screw holes on the edge of the end cover 1, so that the gland 41 and the end cover 1 are fixed. The stability and the reliability of the compression assembly 4 are improved through the design, and the compression assembly has the characteristics of easy installation and disassembly, and is convenient to maintain and maintain.
Referring to fig. 5 and 8, in the present embodiment, the motor shaft sealing structure further includes a bearing 5, an inner cavity 12 is further formed in the end cover 1, the inner cavity 12 is disposed on a side of the outer cavity 11 away from the end cover 1, and the bearing 5 is disposed on an outer side of the rotating shaft 6 in a penetrating manner and is accommodated in the inner cavity 12. Specifically, the interior of the end cap 1 includes an outer cavity 11 and an inner cavity 12, the interior of the end cap 1 is bulged to form an annular platform that separates the interior of the end cap 1 to form the outer cavity 11 near the axial forward end and the inner cavity 12 near the axial rearward end. The bearing 5 is installed in the inner cavity 12, and the pivot 6 passes the bearing 5, and the bearing 5 provides stable support for the rotation of pivot 6, improves the life and the stability of motor.
Referring to fig. 2, in an embodiment, the graphite member 3 is a first graphite ring 31, an outer periphery 21 is disposed on an outer periphery of the sleeve 2, the first graphite ring 31 is sleeved on the outer periphery of the sleeve 2, the compressing assembly 4 compresses an axial front end of the first graphite ring 31, and an axial rear end of the first graphite ring 31 is compressed on the outer periphery 21. Specifically, there are various structural forms of the graphite member 3, and in this embodiment, the graphite member 3 is a first graphite ring 31 having an annular structure. The outer periphery of the shaft sleeve 2 is radially protruded to form a circle of outer periphery 21, the first graphite ring 31 is sleeved on the outer periphery of the shaft sleeve 2, and the first graphite ring 31 is positioned at the axial front end of the outer periphery 21. Accordingly, when the pressing plate 42 applies pressure toward the first graphite ring 31, the axially rear end of the first graphite ring 31 presses the axially front end of the outer peripheral edge 21, the outer peripheral edge 21 provides support to the first graphite ring 31, and the first graphite ring 31 is clamped in between by the pressing plate 41 and the outer peripheral edge 21. Thereby, the pressing plate 42 presses the first graphite ring 31 against the outer periphery 21, so that the pressing plate 42, the first graphite ring 31 and the outer periphery 21 of the sleeve 2 are tightly adhered, and good sealing performance is ensured.
Referring to fig. 4, in an embodiment, the graphite member 3 is a second graphite ring 32, an outer periphery of the sleeve 2 is provided with an outer periphery 21, the second graphite ring 32 is sleeved on the outer periphery 21, the second graphite ring 32 includes a front end surface ring 321, a rear end surface ring 322 and a side surface ring 323, and the front end surface ring 321, the rear end surface ring 322 and the side surface ring 323 are respectively surrounded on an axial front end, an axial rear end and a radial outer periphery of the outer periphery 21. Specifically, the graphite member 3 of the present embodiment is another second graphite ring 32 having an annular structure, and both the second graphite ring 32 and the first graphite ring 31 are annular in shape, but the second graphite ring 32 is also formed with an annular groove on the inner side of the second graphite ring 32 as compared with the first graphite ring 31. The outer periphery of the sleeve 2 is radially convex formed with a ring of outer periphery 21, which outer periphery 21 is provided in an annular groove, the entire outer periphery 21 being surrounded by the second graphite ring 32. Specifically, the second graphite ring 32 is fitted around the outer peripheral edge 21, the second graphite ring 32 forms a front end surface ring 321 at the axial front end of the outer peripheral edge 21, forms a rear end surface ring 322 at the axial rear end of the outer peripheral edge 21, forms a side surface ring 323 at the radial edges of the outer peripheral edge and the outer peripheral edge, and the front end surface ring 321, the rear end surface ring 322, and the side surface ring 323 enclose the outer peripheral edge 21. The front face ring 321 is in contact with the platen 42 and the outer periphery 21, respectively, and the rear face ring 322 is in contact with the outer periphery 21 and the inner wall of the cavity, respectively. When the pressure plate 42 applies pressure to the front end face ring 321, the pressure is transmitted to the rear end face ring 322 through the outer periphery 21 and then transmitted to the inner wall of the cavity, so that the front end face ring 321, the outer periphery 21, the rear end face ring 322 and the inner wall of the cavity are tightly attached to ensure good sealing performance. Through this design, the second graphite ring 32 cross-section presents the U-shaped, and this U-shaped second graphite ring 32 closely laminates with axle sleeve 2, the pressure that motor end cover 1 passed through clamp plate 42, through graphite ring self good lubricity, good elasticity, plays sealed effect.
Referring to fig. 1 to 8, the embodiment of the present invention further provides a motor including a rotating shaft 6 and a motor shaft sealing structure for sealing the rotating shaft 6, the motor shaft sealing structure being the motor shaft sealing structure in the above embodiment. The motor shaft sealing structure is described in detail in the above embodiments, and for brevity of description, it is not repeated here.
Specifically, during installation, the rotating shaft 6, the bearing 5 and the end cover 1 are firstly installed and fixed, the shaft sleeve 2 is in interference fit with the rotating shaft 6, the shaft sleeve 2 is sleeved into the rotating shaft 6 through heating expansion, the motor rotates together with the rotating shaft 6 during operation, the graphite piece 3 is structurally installed on the outer side of the shaft sleeve 2, the outer periphery 21 of the shaft sleeve 2 is in contact with the pressing plate 42, the pressing plate 42 is L-shaped (the end plate 421 is perpendicular to the side plate 422), the graphite piece 3 is fixed in the radial direction and the axial direction respectively, the outermost pressing cover 41 is locked on the motor end cover 1 through the fixing bolt 45, the pressing cover 41 is provided with a locking bolt, a spring is arranged below the locking bolt, and after the motor is assembled, a pretightening force is provided through the locking bolt and is transmitted to the graphite piece 3 through the spring and the pressing plate 42, so that the graphite piece 3 and the shaft sleeve 2 are tightly combined. The graphite member 3 has the advantages of good self-lubricity, high coefficient of restitution and the like, and can achieve the effect of sealing the rotating machinery part, so that the motor is isolated from the outside. Meanwhile, if the graphite piece 3 is worn due to long-term work, larger pretightening force can be provided through the locking bolt, so that the sealing is ensured not to fail.
Through the motor of this embodiment, adopted foretell motor shaft seal structure, utilize pretension piece 43 to compress tightly gland 41 and realize the adjustable fixed to graphite spare 3 to according to graphite spare 3 itself have good lubrication wear-resisting, electrically conductive etc. effect, can realize improving the cooling efficiency of motor, reduce motor mechanical loss, eliminate the malignant influence of shaft current, guarantee the whole waterproof seal of motor when wholly promoting motor performance.
While the invention has been described with reference to certain preferred embodiments, it will be understood by those skilled in the art that various changes and substitutions of equivalents may be made and equivalents will be apparent to those skilled in the art without departing from the scope of the invention. Therefore, the protection scope of the invention is subject to the protection scope of the claims.
Claims (10)
1. A motor shaft sealing structure for sealing a rotating shaft of a motor, comprising:
the end cover is arranged on the outer side of the rotating shaft in a penetrating way, and an outer cavity is formed in the end cover around the rotating shaft;
the shaft sleeve is sleeved on the rotating shaft and is positioned in the outer cavity;
the graphite piece is arranged on the periphery of the shaft sleeve in a surrounding mode;
and the compression assembly is arranged on the end cover so as to cover the outer cavity and is used for compressing the graphite piece axially and radially.
2. The motor shaft sealing structure according to claim 1, wherein the pressing assembly comprises a pressing cover and a pressing plate, the pressing cover is fixedly arranged on the end cover and covers the outer cavity, the pressing plate is arranged on one side of the pressing cover facing the outer cavity, and the pressing plate presses the front axial end of the graphite piece on the side, facing away from the pressing cover.
3. The motor shaft seal structure according to claim 2, wherein the pressing plate includes an end plate provided between the pressing cover and an axial front end of the graphite member, and a side plate extending from a radial edge of the end plate to a radial edge of the graphite member in a direction away from the pressing cover to press the graphite member in a radial direction.
4. The motor shaft sealing structure according to claim 2, wherein the pressing assembly further comprises a pre-tightening member and an elastic member, the pre-tightening member is arranged in the pressing cover in a penetrating manner, one end of the elastic member is abutted against the pre-tightening member, and the other end of the elastic member is abutted against the pressing plate; the pre-tightening piece is movably locked along the axial direction of the rotating shaft so as to adjust the pre-tightening force applied to the pressing plate.
5. The motor shaft seal structure according to claim 4, wherein the gland is provided with a screw hole, the pretension member is a lock bolt, and the lock bolt is screwed and locked with the screw hole.
6. The motor shaft seal arrangement of claim 2, wherein the compression assembly further comprises a fixing bolt fixedly connected to the end cap through the gland.
7. The motor shaft sealing structure according to claim 2, further comprising a bearing, wherein an inner cavity is formed in the end cover, the inner cavity is provided on a side of the outer cavity away from the end cover, and the bearing is provided on an outer side of the rotating shaft and is accommodated in the inner cavity.
8. The motor shaft seal structure according to any one of claims 1 to 7, wherein the graphite member is a first graphite ring, an outer periphery of the sleeve is provided with an outer periphery, the first graphite ring is sleeved on the outer periphery of the sleeve, the pressing assembly presses an axial front end of the first graphite ring, and an axial rear end of the first graphite ring is pressed on the outer periphery.
9. The motor shaft seal structure according to any one of claims 1 to 7, wherein the graphite member is a second graphite ring, an outer periphery of the sleeve is provided with an outer periphery, the second graphite ring is sleeved on the outer periphery, the second graphite ring includes a front end face ring, a rear end face ring and a side face ring, and the front end face ring, the rear end face ring and the side face ring are respectively provided around an axial front end, an axial rear end and a radial outer periphery of the outer periphery.
10. An electric machine comprising a motor shaft sealing structure as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311619124.3A CN117833536A (en) | 2023-11-29 | 2023-11-29 | Motor shaft sealing structure and motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311619124.3A CN117833536A (en) | 2023-11-29 | 2023-11-29 | Motor shaft sealing structure and motor |
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| Publication Number | Publication Date |
|---|---|
| CN117833536A true CN117833536A (en) | 2024-04-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311619124.3A Pending CN117833536A (en) | 2023-11-29 | 2023-11-29 | Motor shaft sealing structure and motor |
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| CN (1) | CN117833536A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118100509A (en) * | 2024-04-24 | 2024-05-28 | 云梦山(常州)科技有限公司 | Motor internal and external pressure balance system |
-
2023
- 2023-11-29 CN CN202311619124.3A patent/CN117833536A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118100509A (en) * | 2024-04-24 | 2024-05-28 | 云梦山(常州)科技有限公司 | Motor internal and external pressure balance system |
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