CN211259354U

CN211259354U - Bearing structure of blower

Info

Publication number: CN211259354U
Application number: CN201921926600.5U
Authority: CN
Inventors: 林嘉佑
Original assignee: Taijia Chengdu Glass Fiber Co ltd
Current assignee: Taijia Chengdu Glass Fiber Co ltd
Priority date: 2019-11-08
Filing date: 2019-11-08
Publication date: 2020-08-14
Anticipated expiration: 2029-11-08

Abstract

The utility model discloses a forced draught blower bearing structure, including the bearing frame, open on the bearing frame and have the shaft hole that supplies the main shaft to pass through, it has the ring channel to open on the inside wall in shaft hole, is equipped with the bearing in the ring channel, and the bearing includes bearing inner race and bearing outer race, form annular assembly passageway between bearing inner race and the bearing outer race, the assembly passageway is provided with two sets of coaxial holders, is equipped with the first through-hole perpendicular with the bearing axis on the bearing frame upper wall, overlaps on the outer circumferential wall of glib hypomere and is equipped with the sleeve coaxial with it, and the sleeve up end is equipped with the second through-hole that supplies the glib to pass through, is equipped with a plurality of evenly distributed first oilholes at its lower section along sleeve circumference; the lower wall of the bearing seat is provided with an oil unloading hole. Compared with the prior art, the utility model provides a forced draught blower bearing structure makes lubricating oil can be better contact with forced draught blower main shaft bearing rolling element through the improvement to forced draught blower bearing structure, makes the rolling element fully lubricated.

Description

Bearing structure of blower

Technical Field

The utility model relates to a forced draught blower specifically is forced draught blower bearing arrangement.

Background

A blower is a machine that converts mechanical energy of a prime mover into a transport gas and supplies the transport gas with energy. The blower transmits the power of the motor to the impeller to do work through the main shaft, one end of the main shaft is the impeller, and the other end of the main shaft is connected with the coupler and the motor. The main shaft is generally assisted by a bearing to rotate uniformly and stably. The abrasion of a transmission part is a common problem of a fan, particularly, a bearing runs for a long time, parts are easy to abrade in a friction mode, and the bearing also can generate a large amount of heat to cause the temperature of the bearing to be too high in long-term high-speed running, so that the metal between a main shaft and the bearing is fatigued, a fit clearance is generated, and the main shaft is deformed due to uneven stress.

Generally, lubricating oil is added into a bearing to reduce the rotary friction of a rolling body in the bearing, and heat generated by the friction in the bearing and other heat transmitted from the outside are taken away, and reasonable lubrication is the key for relieving impact load concentrated stress and prolonging the service life of the bearing and a main shaft. However, in actual lubrication, lubricating oil is difficult to enter a bearing rolling body of a main shaft of a blower, the utilization rate is extremely low, old lubricating oil is filled in the bearing to influence the lubricating effect, poor lubrication is caused, and the bearing is damaged by accelerated wear.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome prior art lubricating oil and be difficult to get into forced draught blower main shaft bearing rolling element, the not enough of lubricating oil low-usage provides a forced draught blower bearing structure, through the improvement to forced draught blower bearing structure, makes lubricating oil can be better with forced draught blower main shaft bearing rolling element contact, makes the rolling element fully lubricated.

The purpose of the utility model is mainly realized through the following technical scheme:

the bearing structure of the air feeder comprises a bearing seat, wherein a shaft hole for a main shaft to pass through is formed in the bearing seat, an annular groove is formed in the inner side wall of the shaft hole, a bearing is arranged in the annular groove, the bearing comprises a bearing outer ring and a bearing inner ring, an annular assembly channel is formed between the bearing outer ring and the bearing inner ring, the assembly channel is provided with two groups of coaxial retainers, rolling bodies are assembled in the retainers, the two groups of retainers are connected through a connecting rod, a first through hole vertical to the axis of the bearing is formed in the upper wall of the bearing seat, the lower section of an oil nozzle penetrates through the first through hole and extends inwards to the assembly channel, the axis of the oil nozzle is positioned between the two groups of retainers; the outer circumferential wall of the lower section of the oil nozzle is sleeved with a sleeve coaxial with the oil nozzle, two ends of the sleeve are closed, the upper end surface of the sleeve is provided with a second through hole through which the oil nozzle passes, the lower section of the sleeve is provided with a plurality of first oil holes uniformly distributed along the circumferential direction of the sleeve, and the first oil holes are communicated with the assembly channel; the lower wall of the bearing seat is provided with an oil unloading hole.

In the prior art, a bearing of an air feeder is usually lubricated by a mode of supplying lubricating oil on one side, the lubricating oil enters the bearing from the side and is difficult to enter a rolling body, and gradually flows to the rolling body in the operation of the bearing, the lubricating oil flows in the bearing and then contacts with the rolling body of the bearing, most of the lubricating oil is retained at other positions of the bearing, the utilization rate of the lubricating oil is not high, and poor lubrication can be caused; in addition, current glib talker only has an oil pipe, and a large amount of lubricating oil once flows out from the position of producing oil, and partly can the cladding rolling element, and most can flow out along the direction of producing oil, flows to other positions along bearing inner race and inner circle inner wall, causes the waste of lubricating oil, also makes the lubricating oil cladding of rolling element insufficient, and lubricated effect is poor.

According to the technical scheme, the bearing is provided with two groups of retainers, namely the bearing is provided with two rows of rolling bodies which are distributed annularly, the oil nozzle is arranged above the two groups of rolling bodies of the bearing, the axis of the oil nozzle is positioned between the two groups of retainers, even if the oil nozzle is positioned between the two rows of rolling bodies, lubricating oil directly enters the rolling bodies of the bearing from the central position, and the two rows of rolling bodies of the bearing can be uniformly lubricated at the same time; the technical scheme is that a sleeve with a first oil hole is sleeved on the oil outlet pipe, so that lubricating oil flows out from the periphery of the oil outlet pipe along the first oil hole, the first oil hole arranged in the circumferential direction enables the lubricating oil to uniformly flow out along the circumference, the injected lubricating oil is shunted, and the shunted lubricating oil can be in contact with more parts of a bearing rolling element so as to fully lubricate the rolling element; it can be seen that in the technical scheme, the bearing is provided with two rows of rolling bodies, the oil nozzle is arranged at the central position of the first bearing, and the first oil hole arranged in the circumferential direction is utilized, so that lubricating oil can accurately reach the inner ring of the bearing along the first oil hole, and can be better contacted with the rolling bodies of the bearing, and the rolling bodies are fully lubricated.

It needs to be further explained that the bearing of the technical scheme can select a double-row self-aligning cylindrical roller bearing; the sleeve in the technical scheme can enable the upper end of the sleeve to be fixed on the inner side wall of the upper end of the bearing seat, or the upper end face of the sleeve is fixedly connected with the outer circumferential wall of the oil nozzle; when the main shaft rotates in the technical scheme, the inner ring of the bearing rotates to enable the rolling body to roll; according to the technical scheme, the inner side wall of the bearing outer ring and the outer side wall of the bearing inner ring are both provided with annular grooves which are coaxial with the bearing, the bearing outer ring and the bearing inner ring are coaxial, and the annular grooves of the bearing outer ring and the bearing inner ring form an assembly channel.

It needs to be further explained that a main shaft is sleeved in the bearing, and an oil seal is arranged at the joint of the end face of the bearing seat and the outer circumferential wall of the main shaft.

Furthermore, a rotating motor is arranged on the bearing seat, a bevel gear is arranged at the output end of the rotating motor, the upper section of the sleeve penetrates through the first through hole and then extends outwards, a planetary gear matched with the bevel gear is arranged on the extending section of the sleeve, an O-shaped rotating sealing ring is arranged in the second through hole, and the inner circular wall of the O-shaped rotating sealing ring is in contact with the outer circular wall of the oil nozzle.

Because the lubricating oil has high consistency and poor fluidity, the technical scheme is that the rotating motor is arranged, and the sleeve rotates by utilizing the motor to enable the lubricating oil to quickly flow out to enter the bearing; in addition, when no motor control is provided, the lubricating oil falls down along the gravity direction, when the axis of the bearing is in the horizontal direction, the lubricating oil flows down along the gravity direction to reach the central positions of two rows of rollers to be contacted with the end faces of the rollers, when the axis of the bearing is in the vertical direction, the lubricating oil flows to the rollers on one side along the gravity direction, and under the natural state, the contact surface between the lubricating oil and the rollers is small and uneven, and the lubricating effect is poor.

Furthermore, a plurality of side plates are uniformly arranged at the bottom end of the sleeve along the circumferential direction of the inner wall of the sleeve, a centrifugal area is formed between every two adjacent side plates, and each centrifugal space is provided with at least one first oil hole communicated with the assembly channel.

This technical scheme sets up a plurality of curb plates in the sleeve, and two adjacent curb plates, sleeve circumference wall and sleeve inside wall form a centrifugal space to the correspondence is equipped with at least one first oilhole, and this kind of mode of setting up evenly divides into a plurality of centrifugal spaces with the route of producing oil, makes lubricating oil can follow the even first oilhole of following in centrifugal space and gets into the bearing, makes better and the contact of bearing rolling element of lubricating oil, makes the rolling element fully lubricated.

Further, the outer diameter of the lower section of the oil nozzle is gradually reduced from top to bottom along the axial direction of the oil nozzle to form a conical oil outlet pipe, the bottom of the oil outlet pipe is connected with an oil column, a plurality of third oil holes are formed in the outer wall of the oil outlet pipe along the axial direction of the oil column, a plurality of guide grooves are formed in the outer circumferential wall of the oil outlet pipe along the axial direction of the oil column, and the guide grooves are uniformly distributed along the.

This technical scheme sets up the oil column in oil pipe, is to divide into the trickle of stranded lubricating oil that flows from the glib talker into the stranded along the guide slot on the outer periphery wall of oil column, and the position that touches when making lubricating oil whereabouts reaches the bearing is more, the area is bigger, makes lubricating oil can be faster more even contact with the bearing rolling element, makes the rolling element fully lubricated. The oil outlet pipe shape and the third oil hole in the technical scheme are used for leading lubricating oil to the oil column from the oil outlet pipe.

Furthermore, an annular oil groove is formed in the end face of the bearing inner ring, a plurality of second oil holes are formed in the bearing inner ring along the annular oil groove, one end of each second oil hole is communicated with the annular oil groove, and the other end of each second oil hole is communicated with the assembly channel.

The lubricating oil that adds probably falls on the bearing terminal surface in adding or follow-up rotation when the bearing rotates, makes the lubricating oil that gets into in the bearing reduce, and this technical scheme sets up annular oil groove and second oilhole at bearing inner race terminal surface, utilizes oil groove and oilhole to introduce the bearing with the rolling element contact in the lubricating oil that falls on bearing inner race terminal surface, improves lubricating oil utilization ratio, makes better and the contact of bearing rolling element of lubricating oil, makes the rolling element fully lubricated.

Furthermore, the end face of the bearing inner ring is provided with an annular taper sleeve coaxial with the bearing inner ring, the taper sleeve is sleeved with a nut in threaded connection with the taper sleeve, the inner circumferential wall of the taper sleeve is provided with a conical surface, the conical surface extends towards the bearing inner ring along the axial direction of the taper sleeve, the end face of the bearing inner ring is provided with a conical hole matched with the conical surface extension section, a positioning ring is arranged between the taper sleeve and the end face of the bearing inner ring, and the taper sleeve is pulled by rotating the nut to move axially along the bearing so that the bearing is fixed on the taper sleeve.

Because the bearing runs at a high speed for a long time, the stability of the bearing also influences the lubricating effect in the bearing, the oil nozzle of the bearing running stably can be just opposite to the middle position of two rows of rolling bodies, so that the lubricating oil is fully contacted with the rolling bodies, once the bearing deviates, the lubricating oil is likely to fall on the outer side of the bearing and cannot enter the inner diameter of the bearing, the lubricating oil is wasted, and the lubricating effect of the bearing is poor. This technical scheme sets up taper sleeve and nut on the bearing, utilizes nut and taper sleeve cooperation to make the bearing fix on the taper sleeve, increases bearing stability, and inside reaching the bearing, better and the contact of bearing rolling element made the rolling element fully lubricated can be accurate when making lubricating oil add.

It needs to be further explained that the end surface of the bearing inner ring can extend outwards along the bearing, the annular taper sleeve is sleeved on the extension section, and the outer circumferential wall of the extension section is a conical surface and is matched with the conical surface of the inner circumferential wall of the taper sleeve; the outer circumferential wall of the main shaft can also be provided with a conical surface matched with the conical surface of the inner circumferential wall of the taper sleeve.

To sum up, compared with the prior art, the utility model has the following beneficial effects:

1. the utility model has the advantages that two rows of rolling bodies distributed annularly are arranged in the bearing by arranging the two groups of holding frames, and the oil nozzle is arranged above the two groups of rolling bodies of the bearing, so that lubricating oil directly enters the rolling bodies of the bearing from the central position, and the two rows of rolling bodies of the bearing can be lubricated simultaneously and uniformly; the sleeve with the first oil hole is sleeved on the oil outlet pipe to divide injected lubricating oil, and the motor is used for driving the sleeve to rotate to control the lubricating oil to flow out, so that the lubricating oil can be in contact with more parts of the bearing rolling element, and the rolling element is fully lubricated.

2. The utility model discloses set up cyclic annular oil groove and second oilhole at bearing inner circle terminal surface, utilize oil groove and oilhole will fall on the lubricating oil of bearing inner circle terminal surface and contact with the rolling element in introducing the bearing, improve lubricating oil utilization ratio, make better and the contact of bearing rolling element of lubricating oil, make the rolling element fully lubricated.

Drawings

The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:

FIG. 1 is a cross-sectional view of a blower bearing;

FIG. 2 is a schematic view of a nozzle tip;

FIG. 3 is a schematic view of the nozzle tip and sleeve assembly;

FIG. 4 is a schematic diagram of the inner side plate structure of the sleeve;

the bearing comprises a bearing seat 1, a bearing seat 2, a bearing outer ring 201, a bearing inner ring 202, an oil groove 2021, a second oil hole 2022, a retainer 203, a connecting rod 204, a rolling body 205, a nozzle 3, an oil outlet pipe 301, a third oil hole 302, an oil column 303, a guide groove 304, a sleeve 305, a first oil hole 306, a side plate 307, a planetary gear 308, a rotating motor 309, a bevel gear 310, a taper sleeve 401, a taper cone 402, a nut 403, a positioning ring 404, an oil unloading hole 5 and a spindle 6.

Detailed Description

To make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the following examples and drawings, and the exemplary embodiments and descriptions thereof of the present invention are only used for explaining the present invention, and are not intended as limitations of the present invention.

Example 1:

as shown in fig. 1-3, the embodiment discloses a blower bearing structure, which includes a bearing seat 1, wherein the bearing seat 1 is provided with a shaft hole for a main shaft 6 to pass through, an annular groove is formed on an inner side wall of the shaft hole, a bearing 2 is arranged in the annular groove, the bearing 2 includes a bearing outer ring 201 and a bearing inner ring 202, an annular assembly passage is formed between the bearing outer ring 201 and the bearing inner ring 202, the assembly passage is provided with two sets of coaxial retainers 203, rolling bodies 205 are assembled in the retainers 203, the two sets of retainers 203 are connected with each other through a connecting rod 204, the upper wall of the bearing seat 1 is provided with a first through hole perpendicular to an axis of the bearing 2, a lower section of an oil nozzle 3 penetrates through the first through hole and extends inwards to the assembly passage, an axis of the oil nozzle 3 is located between the two sets of retainers 203, and an upper; a sleeve 305 coaxial with the oil nozzle 3 is sleeved on the outer circumferential wall of the lower section of the oil nozzle 3, two ends of the sleeve 305 are closed, a second through hole through which the oil nozzle 3 passes is formed in the upper end surface of the sleeve 305, a plurality of first oil holes 306 uniformly distributed are formed in the lower section of the sleeve 305 along the circumferential direction of the sleeve 305, and the first oil holes 306 are communicated with the assembly channel; the lower wall of the bearing seat 1 is provided with an oil unloading hole 5. The present embodiment can also dispose the first oil hole 306 at the bottom end of the sleeve 305. In the embodiment, the bearing 2 is provided with two groups of cages, namely the bearing 2 is provided with two rows of rolling bodies 205 distributed annularly, the oil nozzle 3 is arranged above the two groups of rolling bodies 205 of the bearing, the oil outlet pipe 301 is arranged between the two groups of cages, namely the two rows of rolling bodies 205, and lubricating oil directly enters the rolling bodies 205 of the bearing from a central position, so that the two rows of rolling bodies 205 of the bearing can be lubricated uniformly at the same time; in this embodiment, a sleeve with a first oil hole 306 is further sleeved on the oil outlet pipe, so that the lubricating oil flows out from the periphery of the oil outlet pipe 301 along the first oil hole 306, the first oil hole 306 arranged in the circumferential direction enables the lubricating oil to uniformly flow out along the circumference, the injected lubricating oil is divided, and the divided lubricating oil can contact with more parts of the bearing rolling element 205, so that the rolling element 205 is fully lubricated; it can be seen that in the present embodiment, by setting the bearing as two rows of rolling elements 205 and arranging the oil nozzle at the middle position of the two rows of rolling elements 205, the first oil hole 306 arranged in the circumferential direction is utilized to enable the lubricating oil to accurately reach the bearing inner ring along the first oil hole 306, and to better contact with the bearing rolling elements 205, so as to fully lubricate the rolling elements 205; in the embodiment, the following ring is used for sealing the gap between the outer circumferential wall of the oil nozzle 3 and the second through hole, and the following ring is made of the solid self-lubricating material, so that when friction occurs between the following ring and the outer circumferential wall of the oil nozzle 3, the solid self-lubricating material can form a layer of lubricating film between the outer circumferential wall of the oil nozzle 3 and the inner circumferential wall of the second through hole, so that the sealing effect and the lubricating effect are achieved, and the loss of the oil nozzle and the second through hole is reduced to the maximum extent.

Preferably, the outer diameter of the lower section of the oil nozzle 3 is gradually decreased from top to bottom along the axial direction thereof to form a tapered oil outlet pipe 301, the bottom of the oil outlet pipe 301 is connected with an oil column 303, the outer wall of the oil outlet pipe 301 is provided with a plurality of third oil holes 302, the outer circumferential wall of the oil column 303 is provided with a plurality of guide grooves 304 along the axial direction thereof, and the guide grooves 304 are uniformly distributed along the circumferential direction of the oil column 303. In this embodiment, the oil column is disposed in the oil outlet pipe, so as to divide the single-strand lubricating oil flowing out from the oil nozzle into multiple strands of fine flows along the guide groove on the outer circumferential wall of the oil column, so that the lubricating oil reaches more positions and has a larger area of the bearing when falling, and the lubricating oil can contact the bearing rolling element 205 more quickly and uniformly, thereby fully lubricating the rolling element 205.

An annular oil groove 2021 is formed in an end surface of the bearing inner race 202, a plurality of second oil holes 2022 are formed in the bearing inner race 202 along the annular oil groove 2021, and one end of each of the second oil holes 2022 is communicated with the annular oil groove 2021 while the other end is communicated with the assembly passage. In this embodiment, the annular oil groove and the second oil hole are formed in the end surface of the bearing inner ring 202, and the lubricating oil falling on the end surface of the bearing inner ring is introduced into the bearing to contact with the rolling element 205 through the oil groove and the oil hole, so that the utilization rate of the lubricating oil is improved, the lubricating oil is better contacted with the bearing rolling element 205, and the rolling element 205 is fully lubricated.

Preferably, the bearing 2 can be a double-row self-aligning cylindrical roller bearing; the upper end of the sleeve 305 is fixed on the inner side wall of the upper end of the bearing seat 1, or the upper end face of the sleeve 305 is fixedly connected with the outer circumferential wall of the oil nozzle 3.

Preferably, the bearing 2 is sleeved on the main shaft 6, the axis of the main shaft 6 is parallel to the horizontal direction, the oil nozzle 3 is arranged above the main shaft 6, and the bearing inner ring 202 rotates when the main shaft 6 rotates.

Preferably, the axis of the second oil hole 2022 is directed from the inner side wall of the oil groove 2021 to the axial middle of the outer side wall of the bearing inner race 202. In this embodiment, the axis of the second oil hole is arranged from the inner side wall of the oil groove to the axial middle part of the outer side wall of the bearing inner ring, so that the second oil hole is distributed in a ring shape and is in the shape of the axial middle part of the outer side wall of the bearing inner ring, the axial middle part of the outer side wall of the bearing inner ring is the side where two rows of rolling elements 205 are close to, and the lubricating oil falling on the end surface of the bearing inner ring can reach the central positions of the two rows of rolling elements 205 through the second oil hole from the oil groove, thereby further improving the utilization rate.

In the bearing structure of the blower disclosed in this embodiment, two rows of rolling bodies 205 are annularly distributed in the bearing by arranging two groups of cages, and the oil nozzles are arranged above the two groups of rolling bodies 205 in the bearing 2, so that the lubricating oil directly enters the rolling bodies 205 of the bearing from the central position, and the two rows of rolling bodies 205 of the bearing can be uniformly lubricated at the same time; the sleeve with the first oil hole is sleeved on the oil outlet pipe to divide the injected lubricating oil, so that the lubricating oil can be in contact with more parts of the bearing rolling element 205, and the rolling element 205 is fully lubricated.

Example 2:

as shown in fig. 4, the present embodiment is different from embodiment 1 in that a rotating motor 309 is disposed on the bearing housing 1, a bevel gear 310 is disposed on an output end of the rotating motor 309, an upper section of the sleeve 305 extends outward after passing through the first through hole, a planetary gear 308 engaged with the bevel gear 310 is disposed on an extending section of the sleeve 305, an O-shaped rotary seal ring is disposed in the second through hole, and an inner circumferential wall of the O-shaped rotary seal ring contacts with an outer circumferential wall of the oil nipple 3.

Preferably, a plurality of side plates 307 are uniformly arranged at the bottom end of the sleeve 305 along the circumferential direction of the inner wall of the sleeve 305, a centrifugal area is formed between two adjacent side plates 307, and each centrifugal space is provided with at least one first oil hole 306 communicated with the assembly channel.

Because the lubricating oil has high consistency and poor fluidity, the lubricating oil can rapidly flow out of the bearing by arranging the rotating motor 309 and rotating the sleeve 305 by using the motor; in addition, when the motor control is not performed, the lubricating oil falls down along the gravity direction, when the bearing axis is in the horizontal direction, the lubricating oil flows down along the gravity direction to reach the central position of two rows of rollers to be in contact with the end faces of the rollers, when the bearing axis is in the vertical direction, the lubricating oil flows to one side of the rollers along the gravity direction, and in a natural state, the contact surface between the lubricating oil and the rollers is small and uneven, and the lubricating effect is poor. By arranging a plurality of side plates 307 in the sleeve, a centrifugal space is formed by two adjacent side plates 307, the circumferential wall of the sleeve 305 and the inner side wall of the sleeve 305, and at least one first oil hole 306 is correspondingly arranged, the arrangement mode uniformly divides an oil outlet path into a plurality of centrifugal spaces, so that lubricating oil can uniformly enter the bearing 2 from the centrifugal spaces along the first oil holes 306, the lubricating oil can be better contacted with the bearing rolling body 205, and the rolling body 205 can be fully lubricated.

Example 3:

the difference between this embodiment and embodiment 1 is that the end surface of the inner bearing ring 202 is provided with an annular taper sleeve 401 coaxial with the inner bearing ring, a nut 403 in threaded connection with the taper sleeve 401 is sleeved on the taper sleeve 401, the inner circumferential wall of the taper sleeve 401 is provided with a tapered surface 402, the tapered surface 402 extends towards the inner bearing ring 202 along the axial direction of the taper sleeve 401, the end surface of the inner bearing ring 202 is provided with a tapered hole matched with the extension of the tapered surface 402, a positioning ring 404 is arranged between the taper sleeve 401 and the end surface of the inner bearing ring 202, and the taper sleeve is pulled by rotating the nut 403 to move axially along the bearing 2 so that the bearing 2 is fixed on. In the embodiment, the taper sleeve and the nut 403 are arranged on the bearing, the bearing 2 is fixed on the taper sleeve by matching the nut 403 with the taper sleeve, the stability of the bearing 2 is improved, and lubricating oil can accurately contact the inside of the bearing 2 when being added, so that the lubricating oil can better contact with the bearing rolling body 205, and the rolling body 205 is fully lubricated.

The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above description is only the embodiments of the present invention, and is not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. The blower bearing structure comprises a bearing seat (1), a shaft hole for a main shaft (6) to pass through is formed in the bearing seat (1), an annular groove is formed in the inner side wall of the shaft hole, it is characterized in that a bearing (2) is arranged in the annular groove, the bearing (2) comprises a bearing outer ring (201) and a bearing inner ring (202), an annular assembly channel is formed between the bearing outer ring (201) and the bearing inner ring (202), the assembly channel is provided with two groups of coaxial cages (203), rolling bodies (205) are assembled in the cages (203), the two groups of cages (203) are connected through connecting rods (204), the upper wall of the bearing seat (1) is provided with a first through hole which is vertical to the axis of the bearing (2), the lower section of the oil nozzle (3) penetrates through the first through hole and extends inwards to the assembly channel, the axis of the oil nozzle (3) is positioned between the two groups of holding frames (203), and the upper section of the oil nozzle (3) extends outwards and is connected with an external oil pipe; the outer circumferential wall of the lower section of the oil nozzle (3) is sleeved with a sleeve (305) coaxial with the oil nozzle, two ends of the sleeve (305) are closed, the upper end surface of the sleeve (305) is provided with a second through hole through which the oil nozzle (3) passes, the lower section of the sleeve (305) is provided with a plurality of first oil holes (306) uniformly distributed along the circumferential direction of the sleeve (305), and the first oil holes (306) are communicated with the assembly channel; the lower wall of the bearing seat (1) is provided with an oil unloading hole (5).

2. The blower bearing structure according to claim 1, wherein the bearing seat (1) is provided with a rotating motor (309), an output end of the rotating motor (309) is provided with a bevel gear (310), an upper section of the sleeve (305) extends through the first through hole and then extends outwards, an extension section of the sleeve (305) is provided with a planetary gear (308) which is matched with the bevel gear (310), an O-shaped rotating seal ring is arranged in the second through hole, and an inner circumferential wall of the O-shaped rotating seal ring is contacted with an outer circumferential wall of the oil nozzle (3).

3. The bearing structure for the blower according to claim 1, wherein a plurality of side plates (307) are provided uniformly in the circumferential direction of the inner wall of the sleeve (305) at the bottom end of the sleeve (305), a centrifugal region is formed between two adjacent side plates (307), and each centrifugal space is provided with at least one first oil hole (306) communicating with the fitting passage.

4. The bearing structure of the blower according to claim 1, characterized in that the outer diameter of the lower section of the oil nozzle (3) is gradually reduced from top to bottom along the axial direction to form a conical oil outlet pipe (301), the bottom of the oil outlet pipe (301) is connected with an oil column (303), the outer wall of the oil outlet pipe (301) is provided with a plurality of third oil holes (302), the outer circumferential wall of the oil column (303) is provided with a plurality of guide grooves (304), and the guide grooves (304) are uniformly distributed along the circumferential direction of the oil column (303).

5. The bearing structure for the blower according to claim 1, characterized in that an annular oil groove (2021) is provided on the end face of the bearing inner race (202), a plurality of second oil holes (2022) are provided on the bearing inner race (202) along the annular oil groove (2021), and one end of the second oil holes (2022) communicates with the annular oil groove (2021) and the other end communicates with the fitting passage.

6. The blower bearing structure according to claim 1, characterized in that the end face of the bearing inner ring (202) is provided with an annular taper sleeve (401) coaxial with the bearing inner ring, the taper sleeve (401) is sleeved with a nut (403) in threaded connection with the taper sleeve, the inner circumferential wall of the taper sleeve (401) is provided with a conical surface (402), the conical surface (402) extends towards the bearing inner ring (202) along the axial direction of the taper sleeve (401), the end face of the bearing inner ring (202) is provided with a conical hole matched with the extending section of the conical surface (402), a positioning ring (404) is arranged between the taper sleeve (401) and the end face of the bearing inner ring (202), and the taper sleeve is pulled by rotating the nut (403) to move axially along the bearing (2) so that the bearing (2) is fixed on the taper sleeve.