Fan bearing system

Abstract

The invention discloses a fan bearing system, comprising an axis, a plane rotating piece, a plane bearing, a rotating bearing and a sleeve. The rotating bearing is fixed in the sleeve, and the axis used for being fixedly connected with the fan blade is inserted in the inner ring of the rotating bearing. The plane rotating piece is fixedly sleeved on the outer circumferential surface of the axis, and the plane bearing is sleeved on the outer circumference of the axis, and the plane bearing is clamped between the lower end surface of the plane rotating piece and the upper end surface of the rotating bearing. The invention forms a relative rotation of the plane support by adding a horizontal rotating surface, forming a "T"-shaped relative rotation mode. The permanent magnet ring and the plane rotating piece are magnetically attracted to each other, so that the plane rotating piece and the plane bearing maintain a certain extrusion pressure. The oil pressure formed when the fan is running pushes the rotor group outward until it floats, and the thrust of the oil pressure is balanced with the suction force of the permanent magnet ring on the plane rotating piece, so that the plane rotating piece and the plane bearing form a non-contact relative rotation, thereby achieving the effect of plane rotation support and making the fan run in a balanced manner.

Description

Technical Field

[0001] The invention relates to a fan, and in particular to a fan bearing system. Background Art

[0002] Generally, fans operate by relative rotation of the outer diameter of the shaft and the inner diameter of the bearing. In this mode, due to the axial clearance between the shaft and the bearing, the running volume will swing, causing contact friction between the shaft and the bearing, which will affect the service life of the fan. Summary of the invention

[0003] In order to overcome the above defects, the present invention provides a fan bearing system, which forms a "T"-shaped relative rotation mode through a plane bearing and a rotating bearing, so that the bearing rotates more balanced and the service life of the fan is extended.

[0004] The technical solution adopted by the present invention to solve its technical problems is: a fan bearing system, including an axis, a plane rotating piece, a plane bearing, a rotating bearing and a sleeve, the rotating bearing is fixedly installed in the sleeve, the axis used for fixed connection with the fan blades is inserted in the inner ring of the rotating bearing, the plane rotating piece is fixedly sleeved on the outer circumference of the axis, the plane bearing is sleeved on the outer circumference of the axis, and the plane bearing is clamped between the lower end face of the plane rotating piece and the upper end face of the rotating bearing.

[0005] As a further improvement of the present invention, the plane bearing is a plane annular structure, and a plurality of oil grooves spirally extending from the outer diameter to the inner diameter are formed on the surface of one end of the plane bearing facing the plane rotating plate, and the oil grooves are filled with lubricating oil.

[0006] As a further improvement of the present invention, the width of each oil groove on the plane bearing gradually narrows from the outer diameter to the inner diameter of the plane bearing.

[0007] As a further improvement of the present invention, the depth of the oil groove is less than 0.2 mm.

[0008] As a further improvement of the present invention, the planar rotating sheet is a smooth-surfaced circular ring made of magnetic conductive material, and is also provided with a permanent magnet ring, which is fixedly installed in the shaft sleeve and clamped between the plane bearing and the upper end surface of the rotating bearing.

[0009] As a further improvement of the present invention, a magnetic focusing ring is provided, which is fixedly installed in the shaft sleeve. A fixed groove is formed on the surface of one end of the magnetic focusing ring facing the plane bearing, and the permanent magnet ring is fixedly inserted in the fixed groove.

[0010] As a further improvement of the present invention, the bearing is one of a powder metallurgy oil-containing bearing, a machined bearing and a ceramic bearing.

[0011] As a further improvement of the present invention, a buffer plate is further provided, and the buffer plate is tightly clamped between the upper end surface of the rotating bearing and the lower end surface of the magnetic focusing ring.

[0012] As a further improvement of the present invention, there is a set gap between the lower end of the shaft core and the bottom surface of the sleeve.

[0013] As a further improvement of the present invention, the axis and the planar rotating piece are fixedly connected by interference fit or laser welding, and when the laser welding fixing structure is adopted, a chamfered surface is formed on the inner side of the planar rotating piece, the welding point is completely accommodated in the space formed by the planar rotating piece and the axis, and the upper end height of the welding point is lower than the set distance of the upper end surface of the planar rotating piece.

[0014] The beneficial effects of the present invention are as follows: the present invention forms a relative rotation of a plane support by adding a horizontal rotating surface, designs a plane bearing, forms a "T"-shaped relative rotation mode with the rotating bearing, and adds a permanent magnet ring to make it magnetically attracted to the plane rotating piece, so that the plane rotating piece and the plane bearing maintain a certain extrusion pressure. When the fan is running, the oil flows from the outer diameter to the inner diameter direction of the plane bearing groove, and the oil pressure formed pushes the rotor group outward until it floats. The thrust of the oil pressure is balanced with the suction force of the permanent magnet ring on the plane rotating piece, so that the plane rotating piece and the plane bearing form a non-contact relative rotation, thereby achieving the effect of plane rotating support, making the fan run more balanced and extending the service life of the fan. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is an exploded view of the structural principle of the present invention;

[0016] Figure 2 It is a schematic diagram of the oil groove structure of the plane bearing of the present invention;

[0017] Figure 3 It is a schematic diagram of the rotor assembly structure of the present invention;

[0018] Figure 4 This is a front view of the first structural principle of the present invention;

[0019] Figure 5 for Figure 4 Enlarged view of middle C;

[0020] Figure 6 It is the second structural principle front view of the present invention.

[0021] Axis---1 Plane rotating piece---2 Plane bearing---3

[0022] Rotating bearing---4 Bushing---5 Oil groove---6

[0023] Permanent magnet ring---7 Magnetic ring---8 Buffer sheet---9

[0024] Motor housing---10 Fan blade---11 Magnet---12

[0025] Fan frame---13 Circuit board---14 Stator coil assembly---15

[0026] Soldering points --- 16 DETAILED DESCRIPTION

[0027] Embodiment: A fan bearing system comprises an axis 1, a plane rotating piece 2, a plane bearing 3, a rotating bearing 4 and a sleeve 5, wherein the rotating bearing 4 is fixedly installed in the sleeve 5, and the axis 1 for fixed connection with the fan blade is inserted in the inner ring of the rotating bearing 4, and the plane rotating piece 2 is fixedly sleeved on the outer circumferential surface of the axis 1, the plane bearing 3 is sleeved on the outer circumference of the axis 1, and the plane bearing 3 is clamped between the lower end surface of the plane rotating piece 2 and the upper end surface of the rotating bearing 4.

[0028] The motor housing is placed in an injection mold for injection molding to form a combination of the motor housing 10 and the fan blades 11, and then welded to the shaft 1 combined with the plane rotating piece 2, and then the magnet 12 is installed to form a rotor assembly. By fixing a plane rotating piece 2 on the shaft 1, a relative rotation of a plane support is added, and a plane bearing 3 is designed, which forms a "T"-shaped relative rotation mode with the rotating bearing 4, so that the bearing center rotates more balanced, avoiding friction between the shaft 1 and the rotating bearing 4 during the rotation process, which is beneficial to improving the service life of the fan.

[0029] The plane bearing 3 is a plane annular structure, and a plurality of oil grooves 6 are formed on the surface of one end of the plane bearing 3 facing the plane rotating piece 2, which extend spirally from the outer diameter to the inner diameter direction, and the oil grooves 6 are filled with lubricating oil. The lubricating oil is contained by providing the spiral oil grooves 6 on the plane bearing 3. When the fan is running, the oil flows from the outer diameter to the inner diameter direction of the groove of the plane bearing 3, and the oil pressure formed pushes the rotor group outward to float, so that the relative rotation between the plane bearing 3 and the plane rotating piece 2 is smoother and the friction is small.

[0030] The width of each oil groove 6 on the plane bearing 3 gradually narrows from the outer diameter to the inner diameter of the plane bearing 3 .

[0031] The depth of the oil groove 6 is less than 0.2 mm, which not only ensures that the plane bearing 3 is fully lubricated, but also helps to reduce the height of the fan.

[0032] The plane rotating piece 2 is a circular ring with a smooth surface made of magnetic conductive material, and is also provided with a permanent magnet ring 7, which is fixedly installed in the shaft sleeve 5, and the permanent magnet ring 7 is clamped between the plane bearing 3 and the upper end surface of the rotating bearing 4. The plane bearing 3 is fixed on the permanent magnet ring 7 by physical methods such as glue to achieve fixed positioning. The permanent magnet ring 7 and the plane rotating piece 2 are magnetically attracted to each other, so that the plane rotating piece 2 and the plane bearing 3 maintain a certain extrusion pressure. When the fan is running, the oil flows from the outer diameter to the inner diameter direction of the groove of the plane bearing 3, and the oil pressure formed pushes the rotor group outward to float. The thrust of the oil pressure is balanced with the suction force of the permanent magnet ring 7 on the plane rotating piece 2, so that the plane rotating piece 2 and the plane bearing 3 form a non-contact relative rotation, achieving the function of plane rotation support, making the fan run more balanced, and extending the service life of the fan.

[0033] A magnetic focusing ring 8 is also provided, which is fixedly installed in the shaft sleeve 5. A fixed groove is formed on the surface of the magnetic focusing ring 8 facing the plane bearing 3, and the permanent magnetic ring 7 is fixedly inserted in the fixed groove. The permanent magnetic ring 7 is fixed to the upper surface of the magnetic focusing ring 8 by physical methods such as glue. The magnetic focusing ring 8 is tightly pressed on the bearing and is interference fit with the shaft sleeve 5 or fixed with glue, which plays the role of installing the permanent magnetic ring 7 and fixing the bearing.

[0034] The bearing is one of a powder metallurgy oil-containing bearing, a machined bearing and a ceramic bearing.

[0035] A buffer sheet 9 is also provided, and the buffer sheet 9 is tightly clamped between the upper end surface of the rotating bearing 4 and the lower end surface of the magnetic focusing ring 8. The buffer sheet 9 can be increased or decreased according to the structural requirements.

[0036] There is a set gap A between the lower end of the shaft core 1 and the bottom surface of the shaft sleeve 5. The shaft core 1 does not contact the bottom surface of the shaft sleeve 5 to avoid rotational friction.

[0037] The axis 1 and the plane rotating piece 2 are fixedly connected by interference fit or laser welding, and when the laser welding fixing structure is adopted, a chamfered surface is formed on the inner side of the plane rotating piece, and the welding spot 16 is completely accommodated in the space formed by the plane rotating piece 2 and the axis 1, and the upper end height of the welding spot 16 is lower than the set distance B of the upper end surface of the plane rotating piece 2. Laser welding is adopted, and the welding point between the plane rotating piece 2 and the axis 1 is designed to be sunken to ensure that the height B of the weld spot after welding is lower than the surface of the plane rotating piece 2, that is, B>0, to avoid interference between the plane rotating piece 2 and the parts when the high-speed rotation occurs, and to avoid wind resistance.

Claims

1. A fan bearing system, characterized in that: The invention comprises an axis (1), a plane rotating sheet (2), a plane bearing (3), a rotating bearing (4) and a sleeve (5), wherein the rotating bearing is fixedly installed in the sleeve, and the axis for being fixedly connected to the fan blade is inserted in the inner ring of the rotating bearing. A plane rotating sheet is fixedly sleeved on the outer circumferential surface of the axis, and the plane bearing is sleeved on the outer circumferential surface of the axis, and the plane bearing is clamped between the lower end surface of the plane rotating sheet and the upper end surface of the rotating bearing. The plane bearing is a plane annular structure, and a plurality of oil grooves (6) are formed on the surface of one end of the plane bearing facing the plane rotating sheet and spirally extending from the outer diameter to the inner diameter direction, and the oil grooves are filled with lubricating oil. The plane rotating sheet is a circular ring with a smooth surface made of magnetic conductive material, and is also provided with a permanent magnet ring (7), which is fixedly installed in the sleeve, and the permanent magnet ring is clamped between the plane bearing and the upper end surface of the rotating bearing. A magnetic focusing ring (8) is also provided, which is fixedly installed in the sleeve, and a fixed groove is formed on the surface of one end of the magnetic focusing ring facing the plane bearing, and the permanent magnet ring is fixedly inserted in the fixed groove.

2. The fan bearing system according to claim 1, characterized in that: The width of each oil groove on the plane bearing gradually narrows from the outer diameter to the inner diameter of the plane bearing.

3. The fan bearing system according to claim 1, characterized in that: The oil groove depth is less than 0.2 mm.

4. The fan bearing system according to claim 1, characterized in that: The bearing is one of a powder metallurgy oil-containing bearing, a machined bearing and a ceramic bearing.

5. The fan bearing system according to claim 1, characterized in that: A buffer sheet (9) is also provided, and the buffer sheet is tightly clamped between the upper end surface of the rotating bearing and the lower end surface of the magnetic focusing ring.

6. The fan bearing system according to claim 1, characterized in that: There is a set gap (A) between the lower end of the shaft and the bottom surface of the sleeve.

7. The fan bearing system according to claim 1, characterized in that: The axis and the plane rotating piece are fixedly connected by interference fit or laser welding, and when the laser welding fixing structure is adopted, a chamfered surface is formed on the inner side of the plane rotating piece, and the welding point (16) is completely accommodated in the space formed by the plane rotating piece and the axis, and the upper end height of the welding point is lower than the set distance (B) of the upper end surface of the plane rotating piece.

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