CN212297308U - Heat-conducting fin, bearing composite support heat radiation structure and vacuum pump - Google Patents

Abstract

The utility model provides a conducting strip, bearing composite support heat radiation structure and vacuum pump, including pivot, bearing end cover, flexible packing ring and conducting strip all are located between bearing and the bearing end cover, one side and bearing end cover or bearing looks butt of flexible packing ring, opposite side and conducting strip looks butt, and the conducting strip includes the body, and the middle part of body has first through-hole, and the body adopts flexible heat conduction material to make. The conducting strip sets up between bearing and bearing end cover, the conducting strip can be relative with the terminal surface of bearing to distribute away the heat of bearing, the conducting strip can be directly with bearing and bearing end cover looks butt, utilize the elastic energy of conducting strip, alleviate vibrations between bearing and the bearing end cover, reach better buffering shock attenuation effect, the conducting strip can also realize heat-conduction simultaneously, can give the life who extends the bearing effectively, overall structure is small and exquisite, the installation is convenient.

Description

Heat-conducting fin, bearing composite support heat radiation structure and vacuum pump

Technical Field

The utility model relates to a bearing heat radiation structure's of pump technical field, concretely relates to conducting strip, bearing composite support heat radiation structure and vacuum pump.

Background

Along with the development of science and technology, the demand of users on high-speed operation bearings is more and more common, and the high-speed operation bearings are applied in scenes under severe working conditions, but when the existing high-speed bearings are applied under some special working conditions, such as working conditions of jolting, vibration, high speed, vacuum and the like, the service life and the heat dissipation of the bearings have great problems. In particular, in the fields requiring continuous high-speed operation such as molecular pumps and vacuum pumps, the requirements for the life of bearings and heat dissipation are high.

The chinese patent application with the publication number CN206211765U discloses a bearing heat dissipation device for a brushless motor of a dust collector, which comprises a motor rotor, a bearing, a motor stator, and a motor casing outside the motor stator, wherein the upper end part of the motor casing is provided with a first casing end cover, the central position of the first casing end cover is provided with a first bearing chamber, the lower end part of the motor casing is provided with a second casing end cover, the central position of the second casing end cover is provided with a second bearing chamber, the first bearing chamber and the second bearing chamber are internally provided with a bearing outer ring, the first bearing chamber and the second bearing chamber are internally provided with a heat conduction element and a rubber ring, and the heat conduction element and the rubber ring are sleeved on the bearing outer ring.

The whole bearing can generate more heat in the running process of the motor, wherein the heat generated by the upper end surface and the lower end surface of the bearing is more due to the rotation of the balls in the bearing, the heat conducting element is only arranged at the circumferential outer edge of the bearing in the prior art, although the heat conducting element can achieve a certain heat dissipation effect, the heat dissipation effect is poor, the heat on the balls of the bearing still needs to be dissipated in an auxiliary manner by utilizing the convection of air, and the heat dissipation effect cannot meet the requirement in a vacuum environment; and the bearing end cover are in rigid butt joint, and under the bumping working condition, the service life of the bearing can be influenced by the direct collision of the bearing and the bearing end cover.

Disclosure of Invention

An object of the utility model is to provide a conducting strip, bearing composite support heat radiation structure and vacuum pump to only dispel the heat to bearing circumference outer fringe among the solution prior art, the radiating effect is poor, and probably takes place between bearing and the bearing end cover to bump the technical problem who shakes.

In order to achieve the above object, the utility model adopts the following technical scheme: the heat conducting fin is used for being arranged between a bearing and a bearing end cover in a cushioning mode, and comprises a body, wherein two opposite side faces of the body are respectively abutted to the bearing and the bearing end cover, and the body is made of a flexible heat conducting material.

Furthermore, the body is an annular body, a first through hole used for being sleeved outside the rotating shaft is formed in the middle of the body, an extension hole is formed in the body, and the extension hole is communicated with the first through hole.

Further, the extension hole is a strip-shaped hole, and the side edge of the strip-shaped hole is provided with a communicating hole communicated with the first through hole.

Further, the number of the extension holes is at least two, and the extension holes are arranged around the first through hole.

Furthermore, the body is also provided with a fixing hole for fixing the bearing or the bearing end cover.

The utility model also discloses a bearing composite support heat radiation structure, locate including pivot, cover epaxial bearing, bearing cap, flexible packing ring, and as above the conducting strip, the flexible packing ring with the conducting strip all is located the bearing with between the bearing cap, one side of flexible packing ring with the bearing cap or bearing looks butt, the opposite side with conducting strip looks butt.

Further, the outer edge surface of the heat-conducting fin is the same as the outer edge surface of the bearing end cover.

Furthermore, the flexible gasket is an annular gasket, the outer edge of the rotating shaft is sleeved with the flexible gasket, and the bearing end cover is provided with a containing groove for containing the flexible gasket.

Further, the depth of the receiving groove is less than or equal to the thickness of the flexible gasket.

The utility model also discloses a vacuum pump, include as above bearing composite support heat radiation structure.

The utility model provides a conducting strip, bearing composite support heat radiation structure and vacuum pump compare with prior art, have following advantage:

1. the utility model discloses a conducting strip sets up between bearing and bearing end cover, the conducting strip can be relative with the terminal surface of bearing, the conducting strip adopts the better material of thermal conductivity, directly cover and locate on the bearing, both can lead the heat that produces on the bearing, and can distribute away fast, no matter be under vacuum environment or the non-vacuum environment, all can reach better radiating effect, the conducting strip is flexible material simultaneously, can alleviate vibrations between bearing and the bearing end cover, avoid direct rigid collision between bearing and the bearing end cover, great increase the life of bearing.

2. The utility model discloses a bearing composite support heat radiation structure, combine together through flexible packing ring and conducting strip, flexible packing ring is direct with conducting strip and bearing cap looks butt, and through the conducting strip contact between flexible packing ring and the bearing, utilize the elastic energy of flexible packing ring, alleviate vibrations between bearing and the bearing cap, and the conducting strip adopts flexible heat conduction material to make, combine together conducting strip and flexible packing ring, can reach better buffering shock attenuation effect, the conducting strip can also realize the heat dissipation simultaneously, can give the life who extends the bearing effectively, overall structure is small and exquisite, the installation is convenient.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural view of a heat conducting fin according to an embodiment of the present invention;

fig. 2 is a schematic cross-sectional structural view of a heat dissipation structure of a bearing composite support provided in an embodiment of the present invention;

fig. 3 is a schematic cross-sectional structural diagram of a vacuum pump provided in an embodiment of the present invention;

fig. 4 is a partially enlarged structural view of a portion a in fig. 3.

Description of reference numerals:

1. a bearing; 2. a bearing end cap; 3. a rotating shaft; 4. a heat conductive sheet; 5. a flexible gasket; 21. a second through hole; 22. accommodating grooves; 41. a body; 42. a first through hole; 43. an extension hole; 44. a communicating hole; 45. and (7) fixing holes.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.

Example 1

Referring to fig. 1 and fig. 2, the heat-conducting fin 4 of the present invention will now be described. The heat conducting fin 4 is used for being arranged between the bearing 1 and the bearing end cover 2 in a cushioning mode, and comprises a body 41, and two opposite side faces of the body 41 are respectively abutted to the bearing 1 and the bearing end cover 2.

The utility model provides a conducting strip 4, compared with the prior art, it sets up between bearing 1 and bearing end cover 2, the cover is located on pivot 3, conducting strip 4 is relative with bearing 1's up end, because the wall thickness on bearing 1's the upper and lower terminal surface is thinner or not be equipped with sealed fixed wall, therefore the heat of bearing 1's upper and lower terminal surface gives off speed faster, on bearing 1 up end was located to conducting strip 4 lid this moment, can contact the heat that produces on the conduction bearing 1, and the conduction is gone out, and contact between conducting strip 4 and the bearing 1, even be in vacuum environment and also can not influence thermal propagation, under non-vacuum environment, conducting strip 4 also can auxiliary bearing 1's heat dissipation.

Specifically, bearing 1 and bearing end cover 2 are prior art generally, bearing 1 that the conventionality adopted, bearing 1's inside is provided with inner circle (not shown), outer lane (not shown) and locates a plurality of ball (not shown) between inner circle and the outer lane, can take place relative rotation between inner circle and the outer lane, the ball is at the rotational friction between inner circle and outer lane to produce more heat, heat is passed to heat-conducting element and is dispelled the heat to bearing 1 through the air convection through the outer lane among the prior art, its conduction efficiency is lower. The utility model provides a conducting strip 4 directly sets up the tip at bearing 1, the heat that the ball produced this moment can be transmitted to conducting strip 4 through the heat-conducting mode of contact heat dissipation, even whole structure is in vacuum environment and also can guarantee the quick transmission of heat that the bearing produced to the conducting strip, in order to avoid causing the heat to gather at the bearing, influence bearing life, under non-vacuum environment, conducting strip 4 also can combine the convection current of air supplementary to dispel the heat to bearing 1.

Preferably, the heat conducting strip 4 generally adopts flexible heat conducting material, and the heat conducting strip 4 both can have better heat conductivility promptly, and can reach the effect of elastic buffer for can realize flexible butt between bearing end cover 2 and the bearing 1. The flexible heat conduction material can be made of beryllium bronze, silicon rubber or foamed rubber and the like.

The heat conducting plate 4 is generally installed in a circular shape, the first through hole 42 is located in the central region of the main body 41, and the aperture of the first through hole 42 is larger than the diameter of the rotating shaft 3, so that the first through hole 42 can be sleeved outside the rotating shaft 3, and the first through hole 42 does not contact with the rotating shaft 3. The body 41 is provided with an extension hole 43, and the extension hole 43 is communicated with the first through hole 42. The extending hole 43 can reduce the rigidity of the whole heat conducting sheet 4, so that the contact rigidity between the bearing 1 and the heat conducting sheet 4 is reduced, and the purpose of flexible connection is realized. In addition, the contact area with air can be enlarged by the extension holes 43, and the heat dissipation efficiency of the whole heat conducting sheet 4 in a non-vacuum environment is improved.

Further, please refer to fig. 1 together, as a specific embodiment of the heat conducting strip 4 provided by the present invention, the extension hole 43 is a bar-shaped hole, and a communication hole 44 communicated with the first through hole 42 is disposed at a side of the bar-shaped hole. The shape of the extension hole 43 is a long strip-shaped through hole, the long strip-shaped through hole can be fan-shaped and is annularly arranged at the outer edge of the first through hole 42, one end of the communication hole 44 is connected with the communication hole 44, and the other end of the communication hole is communicated with the strip-shaped hole, so that the rigidity of the heat conducting strip is reduced, the weight of the whole heat conducting strip 4 can be reduced through the extension hole 43, and the bending resistance and the like of the whole heat conducting strip 4 are enhanced. Of course, according to the actual situation and the specific requirement, in other embodiments of the present invention, the extension holes 43 may also be in a flower shape, an S shape or other shapes, which is not limited herein.

Preferably, the number of the extension holes 43 is at least two, and the extension holes 43 are arranged around the first through hole 42, that is, the number of the extension holes 43 is two or more, and a plurality of the extension holes 43 are uniformly and annularly arranged outside the first through hole 42.

Further, referring to fig. 1 and 4, as a specific embodiment of the heat conducting fin 4 provided by the present invention, the body 41 is further provided with a fixing hole 45 for fixing with the bearing 1 or the bearing end cap 2. Specifically, the fixing holes 45 are disposed at the outer edge of the body 41, the fixing holes 45 are used for fixing the whole heat conducting fin 4 to the bearing 1 or the bearing end cover 2, so as to ensure the stability of the whole heat conducting fin 4, and the number and the size of the fixing holes 45 can be adjusted according to the actual application place or the specification of the bearing 1 and the specification of the bearing end cover 2, which is not limited herein.

Example 2

Referring to fig. 2, the present invention further provides a bearing composite support heat dissipation structure, the bearing composite support heat dissipation structure includes a rotating shaft 3, a bearing 1, a bearing end cap 2, a flexible gasket 5, and a heat conducting strip 4 as described in embodiment 1, the rotating shaft 3 passes through the first through hole 42, the flexible gasket 5 and the heat conducting strip 4 are both located between the bearing 1 and the bearing end cap 2, one side of the flexible gasket 5 is abutted to the bearing end cap 2, and the other side is abutted to the heat conducting strip 4.

The utility model provides a bearing composite support heat radiation structure, combine together through flexible packing ring 5 and conducting strip 4, flexible packing ring 5 can be directly with conducting strip 4 and bearing end cover 2 looks butt, and through the contact of conducting strip 4 between flexible packing ring 5 and the bearing 1, utilize the elastic energy of flexible packing ring 5 and conducting strip 4 simultaneously, alleviate vibrations between bearing 1 and the bearing end cover 2, conducting strip 4 can also realize the heat dissipation simultaneously, can give the life who extends bearing 1 effectively, the whole structure is small and exquisite, the installation is convenient.

Because the jolt and the vibration of the output shaft of the motor are mainly in the circumferential direction of the output rotating shaft 3, in devices such as a vacuum pump or a molecular pump, the jolt and the vibration born by the bearing 1 also come from the axial direction of the rotating shaft 3, the axial limit of the bearing 1 in the prior art is generally limited by a rigid limit structure in direct contact with the bearing end cover 2, the direct conflict of rigidity cannot be suitable for the environments of jolt, vibration and high speed, and the flexible limit is adopted to achieve a good buffering and damping effect compared with the rigid limit.

The flexible gasket 5 is generally made of a flexible material with certain resilience, such as rubber or silica gel, the flexible gasket 5 and the heat conducting fins 4 are sleeved on the rotating shaft 3 and are located between the bearing end cover 2 and the bearing 1, the flexible gasket 5 and the heat conducting fins 4 are combined, and the flexible gasket is combined with the rigid material to absorb shock and enhance heat conducting capacity.

Preferably, the bearing 1, the bearing end cover 2, the heat conducting sheet 4 and the flexible gasket 5 are all sleeved on the rotating shaft 3, wherein the inner edge of the bearing 1 is directly attached to the rotating shaft 3, the first through hole 42 and the second through hole 21 of the bearing end cover 2 and the heat conducting sheet 4 are far larger than the outer edge of the rotating shaft 3, so that a large gap is formed between the bearing end cover 2 and the heat conducting sheet 4 and the rotating shaft 3, and the flexible gasket 5 is clamped inside the bearing end cover 2.

Preferably, the heat conducting sheet 4 is attached to a side surface of the bearing end cover 2 close to the bearing 1, and the aperture of the first through hole 42 may be larger than the diameter of the second through hole 21, or equal to the diameter of the second through hole 21, so that heat generated by the bearing 1 can be uniformly transferred to the bearing end cover 2 or other adjacent components through the heat conducting sheet 4, thereby enhancing the heat dissipation effect.

Wherein, the outer edge surface of the heat conducting fin 4 is the same as the outer edge surface of the bearing end cover 2. That is, the circumferential outer edge of the heat conducting fin 4 does not exceed the circumferential outer edge of the bearing end cover 2, or the maximum diameter of the heat conducting fin 4 is smaller than or equal to the maximum diameter of the bearing end cover 2, so that the heat dissipation area of the heat conducting fin 4 can be enlarged to the maximum, and the installation of other parts is not influenced.

Preferably, other components capable of dissipating heat and abutting against the heat conducting sheet 4 are further arranged on the outer side of the rotating shaft 3, and the components can be combined with the heat conducting sheet 4 to dissipate heat of the bearing and the bearing end cover more quickly.

Further, refer to fig. 2 to 4, as the utility model provides a bearing composite support heat radiation structure's a specific embodiment, flexible packing ring 5 is the annular packing ring, 3 outer fringe of pivot are located to flexible packing ring 5 cover, just seted up on bearing cap 2 and held flexible packing ring 5's holding tank 22, the degree of depth of holding tank 22 is less than or equal to flexible packing ring 5's thickness. Specifically, bearing end cover 2 is seted up flutedly on a side towards bearing 1, and this recess is holding tank 22 promptly, and flexible packing ring 5 can inlay the inside of locating this holding tank 22, prescribes a limit to the position of flexible packing ring 5 through this holding tank 22, and the upper surface of flexible packing ring 5 and the inner wall butt of holding tank 22, and the lower surface is direct and the looks butt of conducting strip 4. The inside of holding tank 22 is located for the extrusion to flexible packing ring 5, can reach better buffering and resilience effect this moment.

Example 3

Referring to fig. 3 and 4, the present invention further provides a vacuum pump, which includes the bearing composite support heat dissipation structure as described in embodiment 2.

The utility model provides a vacuum pump, compared with the prior art, it adopts the bearing composite support heat radiation structure in embodiment 2, utilize flexible gasket 5 and conducting strip 4's elastic energy, alleviate vibrations between bearing 1 and the bearing end cover 2, the conducting strip 4 can also realize the contact heat dissipation simultaneously, make the bearing structure who is in vacuum environment in the vacuum pump still can reach better radiating effect, can give the life who extends bearing 1 effectively, overall structure is small and exquisite, can not influence the installation of other spare parts of vacuum pump and choose for use, replaceability is strong, the life of whole vacuum pump has been prolonged.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications can be made without departing from the scope of the invention.

Claims (10)

1. The conducting strip is used for being cushioned between the bearing (1) and the bearing end cover (2), and is characterized in that: the bearing comprises a body (41), wherein two opposite side surfaces of the body (41) are respectively abutted to a bearing (1) and a bearing end cover (2), and the body (41) is made of a flexible heat conduction material.

2. A heat conductive sheet as claimed in claim 1, wherein: the rotating shaft is characterized in that the body (41) is an annular body, a first through hole (42) used for being sleeved outside the rotating shaft (3) is formed in the middle of the body (41), an extension hole (43) is formed in the body (41), and the extension hole (43) is communicated with the first through hole (42).

3. A heat conductive sheet as claimed in claim 2, wherein: the extension holes (43) are strip-shaped holes, and communication holes (44) communicated with the first through holes (42) are formed in the side edges of the extension holes (43).

4. A heat conductive sheet as claimed in claim 2, wherein: the number of the extension holes (43) is at least two, and the extension holes (43) are arranged around the first through hole (42).

5. A thermally conductive sheet as claimed in any one of claims 1 to 4, wherein: the body (41) is further provided with a fixing hole (45) for fixing the bearing (1) or the bearing end cover (2).

6. Bearing composite support heat radiation structure is located including pivot (3), cover bearing (1) and bearing end cover (2) on pivot (3), its characterized in that still includes:

a flexible gasket (5); and

the thermally conductive sheet as claimed in any of claims 1 to 5, wherein the flexible gasket (5) and the thermally conductive sheet (4) are each located between the bearing (1) and the bearing cap (2), and one side of the flexible gasket (5) abuts against the bearing cap (2) or the bearing (1) and the other side abuts against the thermally conductive sheet (4).

7. The composite bearing support heat dissipation structure of claim 6, wherein: the outer edge surface of the heat-conducting fin (4) is the same as the outer edge surface of the bearing end cover (2).

8. The composite bearing support heat dissipation structure of claim 6, wherein: the flexible gasket (5) is an annular gasket, the outer edge of the rotating shaft (3) is sleeved with the flexible gasket (5), and the bearing end cover (2) is provided with a containing groove (22) for containing the flexible gasket (5).

9. The composite bearing support heat dissipation structure of claim 8, wherein: the depth of the accommodation groove (22) is less than or equal to the thickness of the flexible gasket (5).

10. Vacuum pump, its characterized in that: a composite support and heat dissipation structure comprising a bearing as claimed in any one of claims 6 to 9.

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