CN111720357A

CN111720357A - Fan and self-lubricating bearing thereof

Info

Publication number: CN111720357A
Application number: CN201910216593.8A
Authority: CN
Inventors: 苏彦文
Original assignee: Enermax Technology Corp
Current assignee: Enermax Technology Corp
Priority date: 2019-03-21
Filing date: 2019-03-21
Publication date: 2020-09-29

Abstract

The invention discloses a fan and a self-lubricating bearing thereof. The ceramic cylinder body has two end faces, one outer ring connected between the end faces and with several grooves extending from one end face to the other end face. The end covers cover the end faces respectively. Therefore, the lubricating oil contained in the self-lubricating bearing can be prevented from being thrown out of the self-lubricating bearing.

Description

Fan and self-lubricating bearing thereof

Technical Field

The present invention relates to a fan, and more particularly, to a fan and a self-lubricating bearing thereof, wherein the self-lubricating bearing can prevent lubricating oil from being thrown out.

Background

The invention relates to a fan bearing, wherein a ceramic self-lubricating bearing can adsorb lubricating oil through pores of a ceramic material, and when a fan rotates, the lubricating oil flows between the self-lubricating bearing and a rotating shaft so as to reduce resistance. However, the conventional self-lubricating bearing has a disadvantage that the rotating shaft drives the lubricating oil to rotate and flow when the fan rotates, so that a part of the lubricating oil is thrown out of the bearing to contaminate other adjacent elements in the device where the fan is located.

In view of the above, the present invention is directed to the prior art, and an improved method and apparatus for solving the above problems.

Disclosure of Invention

The invention aims to provide a fan and a self-lubricating bearing thereof, which can prevent lubricating oil from being thrown out.

To achieve the above object, the present invention provides a self-lubricating bearing, which comprises a ceramic cylinder and a pair of end caps. The ceramic cylinder body has two end faces, one outer ring connected between the end faces and with several grooves extending from one end face to the other end face. The end covers cover the end faces respectively.

In the self-lubricating bearing, the grooves are respectively communicated with the inner side and the outer side of the ceramic cylinder. The grooves are arranged in parallel with each other on the outer annular surface. The grooves are respectively parallel to the axial extension of the ceramic cylinder on the outer ring surface. At least one tenon is respectively arranged on each end cover in a protruding way, at least one jack is respectively formed on each end face of the ceramic cylinder body corresponding to at least one tenon on each end cover, and each tenon is respectively inserted into each corresponding jack.

The present invention further provides a fan, which includes a fan frame, the self-lubricating bearing, a rotating shaft, and an impeller. The self-lubricating bearing is arranged in the fan frame. One end of the rotating shaft rod is connected with the ceramic cylinder in a penetrating way. The impeller is connected with the other end of the rotating shaft lever.

In the fan, the fan frame forms a bearing sleeve, and the ceramic cylinder body is arranged in the bearing sleeve in a penetrating way. At least one end cover is provided with a shaft hole, and the rotating shaft rod penetrates into the ceramic cylinder body through the shaft hole. At least one tenon is respectively arranged on each end cover in a protruding way, at least one jack is respectively formed on each end face of the ceramic cylinder body corresponding to at least one tenon on each end cover, and each tenon is respectively inserted into each corresponding jack. Each groove is respectively communicated with the inner side and the outer side of the ceramic cylinder body. The grooves are arranged in parallel with each other on the outer annular surface. The grooves are respectively parallel to the axial extension of the ceramic cylinder on the outer ring surface.

According to the fan and the self-lubricating bearing thereof, two ends of the ceramic cylinder are respectively sealed by the end covers, and the end covers can prevent lubricating oil flowing along the axial direction of the self-lubricating bearing from overflowing the self-lubricating bearing. And the grooves at the two ends of the ceramic cylinder are respectively sealed by end covers to form a pipeline for the backflow of lubricating oil. Therefore, the lubricating oil can be prevented from being thrown out of the self-lubricating bearing when the impeller rotates.

The invention is described in detail below with reference to the drawings and specific examples, but the invention is not limited thereto.

Drawings

Fig. 1 is an exploded perspective view of a fan according to a preferred embodiment of the present invention.

Fig. 2 is a perspective view of a fan according to a preferred embodiment of the invention.

Fig. 3 is a sectional view of a fan according to a preferred embodiment of the present invention.

Fig. 4 is a partially enlarged view of fig. 3.

Fig. 5 is a perspective exploded view of a self-lubricating bearing according to a preferred embodiment of the present invention.

Fig. 6 is a perspective view of a self-lubricating bearing according to a preferred embodiment of the present invention.

Fig. 7 and 8 are sectional views of a self-lubricating bearing according to a preferred embodiment of the present invention.

Wherein, the reference numbers:

100 fan frame

110 bearing sleeve

120 pressing cover

200 self-lubricating bearing

201 top end

202 bottom end

210 ceramic cylinder

211/211a end face

212 outer annular surface

213 groove

214/214a jack

220/220a end cap

221/221a axle hole

224/224a tenon

300 rotating shaft

400 impeller

510 stator coil assembly

520 rotor magnet

Detailed Description

Referring to fig. 1 to 3, a fan according to a preferred embodiment of the present invention includes a fan frame 100, a self-lubricating bearing 200, a rotating shaft 300, an impeller 400, a stator coil assembly 510, and a rotor magnet 520.

In the present embodiment, the fan frame 100 is preferably made by plastic injection molding, the fan frame 100 is a ring frame, and a bearing sleeve 110 is formed at the center of the fan frame 100. The bearing sleeve 110 is disposed along the annular center axis of the fan frame 100 in the axial direction. The bearing sleeve 110 is open at one end and closed at the other end.

The self-lubricating bearing 200 is disposed in the fan frame 100, and specifically the ceramic cylinder 210 is inserted into the bearing sleeve 110 of the fan frame 100. Preferably, the open end of the bearing sleeve 110 is disposed upward for placing the self-lubricating bearing 200, and the open end of the bearing sleeve 110 is provided with a gland 120 for fixing the self-lubricating bearing 200 inside the bearing sleeve 110.

Referring to fig. 5 to 8, in the present embodiment, the self-lubricating bearing 200 preferably includes a ceramic cylinder 210 and a pair of end caps 220/220 a. The ceramic cylinder 210 has pores therein so that the pores can adsorb the lubricating oil. The ceramic cylinder 210 is vertically disposed inside the bearing sleeve 110, and has two ends, a top end 201 and a bottom end 202. The top end 201 and the bottom end 202 of the ceramic cylinder 210 respectively form an end surface 211/211a, and the outer side of the ceramic cylinder 210 forms an outer annular surface 212 connected between the pair of end surfaces 211/211 a. The surface of the ceramic cylinder 210 is provided with a plurality of grooves 213, each groove 213 extends from one end surface 211 to the other end surface 211a through the outer ring surface 212, the pair of end caps 220/220a respectively cover the corresponding end surfaces 211/211a to seal the grooves 213 on the end surfaces 211/211a into pipelines, and the outer ring surface 212 is attached to the inner wall surface of the bearing sleeve 110 to seal the grooves 213 on the outer ring surface 212 into pipelines. At least one axial hole 221 is formed in the end cap 220 of the top end 201 of the ceramic cylinder 210, and in the present embodiment, the end caps 220/220a of the two ends of the ceramic cylinder 210 are preferably formed with the axial hole 221/221a, so that the self-lubricating bearing 200 can be installed upside down. Each end cap 220/220a is provided with at least one tenon 224/224a, each end face 211/211a of the ceramic cylinder 210 is provided with at least one insertion hole 214/214a corresponding to at least one tenon 224/224a on each end cap 220/220a, and each tenon 224/224a is inserted into each corresponding insertion hole 214/214a, so that each end cap 220/220a is fixed at the top end 201 and the bottom end 202 of the ceramic cylinder 210 respectively; the insertion holes 214/214a may be filled with a part of lubricant beforehand, so that the lubricant can be absorbed in the pores inside the ceramic cylinder 210 when the fan is operated, and the part of lubricant flows from the insertion holes 214/214a into the inside of the ceramic cylinder 210 through the pores for lubrication.

In the present embodiment, the grooves 213 are respectively connected to the inside and the outside of the ceramic cylinder 210, so that the lubricant oil can flow between the inside and the outside of the ceramic cylinder 210. The grooves 213 are arranged parallel to each other on the outer annular surface 212. The grooves 213 extend on the outer annular surface 212 in parallel to the axial direction of the ceramic cylinder 210. The present invention is not limited to the arrangement of the grooves 213, but the above-described preferred arrangement can prevent the grooves 213 from increasing the flow resistance of the lubricating oil due to an excessively large turning width between the end surfaces 211/211a and the outer ring surface 212.

One end of the rotary shaft 300 is penetrated through the ceramic cylinder 210, and the rotary shaft 300 is penetrated through the ceramic cylinder 210 through the shaft hole 221. The impeller 400 is connected to the other end of the rotating shaft 300.

The stator coil assembly 510 is annular, and it fits around the bearing sleeve 110 and preferably snaps over the gland 120 to secure the gland 120. The stator coil assembly 510 includes a plurality of coils arranged in a ring array and arranged around the bearing sleeve 110. The rotor magnet 520 is disposed on the impeller 400, the rotor magnet 520 has a ring shape, and the rotor magnet 520 surrounds the stator coil assembly 510 and is spaced apart from the stator coil assembly 510.

When the stator coil assembly 510 is turned on, the rotor magnet 520 is induced to rotate the impeller 400 about the rotating shaft 300. When the rotating shaft 300 rotates, the lubricant contained in the ceramic cylinder 210 infiltrates between the rotating shaft 300 and the ceramic cylinder 210 to reduce the resistance between the rotating shaft 300 and the ceramic cylinder 210. When the rotary shaft 300 rotates, the lubricating oil between the rotary shaft 300 and the ceramic cylinder 210 is rotated and thrown toward the distal end 201 of the ceramic cylinder 210. The lubricant oil flows back from the top end 201 of the ceramic cylinder 210 to the bottom end 202 of the ceramic cylinder 210 through the grooves 213 and enters between the rotating shaft 300 and the ceramic cylinder 210. When the rotating shaft 300 stops operating, the lubricant oozed from the ceramic cylinder 210 during operation is absorbed by the ceramic cylinder 210 by the capillary principle and flows back to the pores in the ceramic cylinder 210, on the other hand, the excessive lubricant which cannot be absorbed by the ceramic cylinder 210 flows into the gap between the fan frame 100 and the ceramic cylinder 210 through the groove 213, and the lubricant is stored in the gap between the fan frame 100 and the ceramic cylinder 210 for recycling when the rotating shaft 300 rotates next time.

In the fan and the self-lubricating bearing 200 thereof, two ends of the ceramic cylinder 210 are respectively sealed by the end cover 220/220a, and the end cover 220/220a can prevent lubricating oil flowing along the axial direction of the self-lubricating bearing 200 from overflowing the self-lubricating bearing 200. And the grooves 213 at the two ends of the ceramic cylinder 210 are respectively closed by end caps 220/220a to form a pipeline for the return flow of the lubricating oil. Therefore, the lubricating oil can be prevented from being thrown out of the self-lubricating bearing 200 when the impeller 400 rotates.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.

The present invention is capable of other embodiments, and various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A self-lubricating bearing, comprising:

the ceramic cylinder body is provided with end faces at two ends respectively, an outer ring surface connected between the end faces is formed at the outer side of the ceramic cylinder body, a plurality of grooves are formed in the surface of the ceramic cylinder body, and each groove extends from one end face to the other end face through the outer ring surface; and

and a pair of end covers respectively covering the end faces.

2. The self-lubricating bearing of claim 1, wherein each groove communicates with the inside and outside of the ceramic cylinder.

3. A self-lubricating bearing according to claim 1, wherein the plurality of grooves are arranged parallel to one another on the outer annular surface.

4. A self-lubricating bearing according to claim 1, wherein the grooves each extend parallel to the axial direction of the ceramic cylinder on the outer annular surface.

5. The self-lubricating bearing of claim 1, wherein each end cap is provided with at least one tenon, each end face of the ceramic cylinder is provided with at least one insertion hole corresponding to at least one tenon of each end cap, and each tenon is inserted into each corresponding insertion hole.

6. A fan, comprising:

a fan frame;

the self-lubricating bearing of claim 1, disposed within the fan frame;

one end of the rotating shaft rod is connected with the ceramic cylinder in a penetrating way; and

an impeller connected to the other end of the rotating shaft.

7. The fan as claimed in claim 6, wherein the fan frame forms a bearing sleeve, and the ceramic cylinder is inserted into the bearing sleeve.

8. The fan as claimed in claim 6, wherein at least one of the end caps has an axial hole, and the rotating shaft penetrates the ceramic cylinder through the axial hole.

9. The fan as claimed in claim 6, wherein each of the end caps is provided with at least one tenon, each of the end faces of the ceramic cylinder is provided with at least one insertion hole corresponding to at least one tenon of each of the end caps, and each tenon is inserted into the corresponding insertion hole.

10. The fan as claimed in claim 6, wherein each of the grooves communicates with an inner side and an outer side of the ceramic cylinder, respectively.

11. The fan as claimed in claim 6, wherein the plurality of grooves are arranged in parallel with each other on the outer circumferential surface.

12. The fan as claimed in claim 6, wherein the grooves extend on the outer circumferential surface in parallel to the axial direction of the ceramic cylinder, respectively.