Axis-stable fan bearing system

Abstract

The present invention discloses a fan bearing system with a stable axis, comprising a sleeve, a plane bearing, a plane rotating sheet, a main bearing and an axis. The main bearing is fixedly installed in the sleeve, and the axis can be rotatably inserted in the main bearing. A plane rotating sheet is fixedly sleeved on the circumferential outer surface of the axis away from one end of the fan blade. The plane bearing is fixedly installed on the inner side of the lower end of the sleeve, and the plane bearing is supported on the flat surface of the lower end surface of the plane rotating sheet. The present invention forms a "T"-shaped relative rotation mode with the main bearing by adding a horizontal rotating surface and a plane bearing, and forms an oil groove on the main bearing and the plane bearing. When the fan is running, oil flows from the outer diameter of the oil groove to the inner diameter direction, and the formed oil pressure pushes the rotor group outward to float, so that the plane rotating sheet and the plane bearing form non-contact relative rotation, thereby achieving the effect of plane rotation support and making the fan run in a balanced manner. At the same time, the plane rotating sheet blocks the lower end of the main bearing, which can avoid the risk of the fan blade falling off.

Description

Technical Field

[0001] The invention relates to a fan, and in particular to a fan bearing system with a stable axis. 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.

[0003] In addition, the fan blades rely on magnetic attraction to remain in the set position, and there is a risk of the blades falling off when the fan is subjected to external force. Summary of the invention

[0004] In order to overcome the above-mentioned defects, the present invention provides a fan bearing system with a stable axis. The fan bearing system with a stable axis enables the bearing to rotate more balanced, extends the service life of the fan, and avoids the risk of fan blades falling off.

[0005] The technical solution adopted by the present invention to solve its technical problems is: a fan bearing system with a stable axis, including a sleeve, a plane bearing, a plane rotating piece, a main bearing and an axis, wherein the main bearing is fixedly installed in the sleeve, and the axis used to be fixedly connected to the fan blades can be rotatably inserted in the main bearing, and a plane rotating piece is fixedly sleeved on the circumferential outer surface of the axis away from one end of the fan blades, the plane bearing is fixedly installed on the inner side of the lower end of the sleeve, and the plane bearing is supported on the flat lower end surface of the plane rotating piece.

[0006] As a further improvement of the present invention, the plane bearing is a planar annular structure, and a plurality of first oil grooves extending spirally 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 first oil grooves are filled with bearing oil.

[0007] As a further improvement of the present invention, at least one axial end face of the main bearing is a smooth plane or a plane formed with a second oil groove, the second oil groove is filled with bearing oil, and a plurality of second oil grooves extend spirally from the outer diameter to the inner diameter of the main bearing.

[0008] As a further improvement of the present invention, the width of the first oil groove gradually narrows from the outer radial direction to the inner diameter direction of the plane bearing, and the width of the second oil groove gradually narrows from the outer radial direction to the inner diameter direction of the main bearing.

[0009] As a further improvement of the present invention, the depths of the first oil groove and the second oil groove are both less than 0.2 mm.

[0010] As a further improvement of the present invention, the main bearing is an oil-containing bearing, a machined bearing or a ceramic bearing.

[0011] As a further improvement of the present invention, the structure in which the main bearing is fixedly installed in the sleeve is as follows: a T-shaped hole with an inner diameter at the upper end being larger than the inner diameter at the lower end is formed on the inner side of the sleeve, the main bearing is inserted into the T-shaped hole, the lower end of the bearing is tightly against the step surface formed between the two ends of the sleeve, and a fixing ring is also fixedly inserted into the inner side of the open end of the sleeve, the fixing ring is tightly against the upper end surface of the main bearing.

[0012] As a further improvement of the present invention, a buffer sheet is further provided, and the buffer sheet is tightly clamped between the upper end surface of the main bearing and the lower end surface of the fixing ring.

[0013] 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.

[0014] As a further improvement of the present invention, the axis and the plane rotating piece are fixedly connected by interference fit or laser welding, and the plane bearing is assembled to the bottom of the sleeve by interference fit or gluing.

[0015] The beneficial effects of the present invention are as follows: the present invention forms a "T"-shaped relative rotation mode with the main bearing by adding a horizontal rotating surface and a plane bearing, and forms an oil groove on the main bearing and the plane bearing. When the fan is running, the oil flows from the outer diameter to the inner diameter of the oil groove, and the oil pressure formed pushes the rotor group outward to float, so that the plane rotating sheet 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. At the same time, the plane rotating sheet blocks the lower end of the main bearing, which can avoid the risk of fan blades falling off. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the first structural principle of the present invention;

[0017] Figure 2 It is a schematic diagram of the second structural principle of the present invention;

[0018] Figure 3 for Figure 2 Enlarged view of part A in the middle;

[0019] Figure 4 The main view of the interference fit between the axis and the plane rotating piece;

[0020] Figure 5 The main view of the welding and fixed connection between the axis and the plane rotating piece;

[0021] Figure 6 This is a structural diagram of the first oil groove on the plane bearing of the present invention;

[0022] Figure 7 A three-dimensional diagram of a first structure of a main bearing of the present invention;

[0023] Figure 8It is a stereoscopic diagram of the second structure of the main bearing of the present invention.

[0024] Bushing---1 Plane bearing---2 Plane rotating piece---3

[0025] Main bearing---4 Axis---5 First oil groove---6

[0026] Smooth surface---7 Second oil groove---8 Fixed ring---9

[0027] Buffer sheet---10 Motor housing---11 Permanent magnet ring---12

[0028] Stator coil assembly---13 Fan blades---14 Circuit board---15

[0029] Fan frame --- 16 Welding point --- 17 DETAILED DESCRIPTION

[0030] Embodiment: A fan bearing system with a stable axis comprises a sleeve 1, a plane bearing 2, a plane rotating piece 3, a main bearing 4 and an axis 5, wherein the main bearing 4 is fixedly installed in the sleeve 1, and the axis 5 for being fixedly connected to the fan blades can be rotatably inserted in the main bearing 4, and a plane rotating piece 3 is fixedly sleeved on the circumferential outer surface of the axis 5 away from one end of the fan blades, the plane bearing 2 is fixedly installed on the inner side of the lower end of the sleeve 1, and the plane bearing 2 is supported on the flat lower end surface of the plane rotating piece 3.

[0031] During assembly, the rotating piece is first fixedly mounted on the shaft 5, the plane bearing 2 is mounted on the bottom of the lower end of the sleeve 1, the combined shaft 5 and the rotating piece are placed in the sleeve 1 with the plane bearing 2, and then the main bearing 4 is fixedly installed, and then the coil assembly and the base are sequentially assembled (the assembly order of the two can be interchangeable due to different designs), and finally the fan blade assembly with the motor housing and the permanent magnet is welded and assembled with the shaft 5 to form a fan. The fan has a plane rotating piece 3 fixedly mounted on the shaft 5, and a relative rotation of a plane support is added. A plane bearing 2 is designed, which forms a "T"-shaped relative rotation mode with the main bearing 4, so that the shaft 5 rotates more balanced, avoiding friction between the shaft 5 and the main bearing 4 during the rotation process, which is beneficial to improving the service life of the fan. At the same time, when the fan blades rotate, the plane rotating piece 3 blocks the lower end of the main bearing 4, which can avoid the risk of the fan blades falling off.

[0032] The plane bearing 2 is a plane annular structure, and a plurality of first oil grooves 6 are formed on the surface of one end of the plane bearing 2 facing the plane rotating piece 3, which extend in a spiral direction from the outer diameter to the inner diameter, and the first oil grooves 6 are filled with bearing oil. The spiral oil grooves are provided on the plane bearing 2 to accommodate the bearing oil. When the fan is running, the oil flows from the outer diameter to the inner diameter of the groove of the plane bearing 2, and the oil pressure formed pushes the rotor group outward to float, so that the relative rotation between the plane bearing 2 and the plane rotating piece 3 is smoother and the friction is small.

[0033] At least one axial end face of the main bearing 4 is a smooth plane 7 or a plane formed with a second oil groove 8 , the second oil groove 8 is filled with bearing oil, and a plurality of second oil grooves 8 spirally extend from the outer diameter to the inner diameter direction of the main bearing 4 .

[0034] The width of the first oil groove 6 gradually narrows from the outer radial direction to the inner diameter direction of the plane bearing 2 , and the width of the second oil groove 8 gradually narrows from the outer radial direction to the inner diameter direction of the main bearing 4 .

[0035] The depths of the first oil groove 6 and the second oil groove 8 are both less than 0.2 mm, which not only ensures that the plane bearing 2 is fully lubricated, but also helps to reduce the height of the fan.

[0036] The main bearing 4 is an oil-containing bearing, a machined bearing or a ceramic bearing.

[0037] The structure of the main bearing 4 fixedly installed in the sleeve 1 is as follows: a T-shaped hole with an inner diameter of the upper end larger than that of the lower end is formed inside the sleeve 1, the main bearing 4 is inserted into the T-shaped hole, the lower end of the bearing is tightly against the step surface formed between the two ends of the sleeve 1, and a fixing ring 9 is fixedly inserted inside the open end of the sleeve 1, and the fixing ring 9 is tightly against the upper end surface of the main bearing 4. The fixing ring 9 and the step surface of the sleeve 1 are clamped on both ends of the main bearing 4 to achieve fixed installation of the main bearing 4.

[0038] A buffer sheet 10 is also provided, and the buffer sheet 10 is tightly clamped between the upper end surface of the main bearing 4 and the lower end surface of the fixing ring 9. The buffer sheet 10 can be increased or decreased according to the structural requirements.

[0039] There is a set gap between the lower end of the shaft core 5 and the bottom surface of the sleeve 1. The shaft core 5 does not contact the bottom surface of the sleeve 1 to avoid rotational friction.

[0040] The axis 5 is fixedly connected to the plane rotating piece 3 by interference fit or laser welding, and the plane bearing 2 is assembled to the bottom of the sleeve 1 by interference fit or gluing. The axis 5 and the fan blade are also fixedly connected by laser welding. During welding, the upper end of the axis 5 forms a step structure with a contracted diameter. The center hole of the fan blade is sleeved on the outer side of the upper end of the axis 5 and stopped on the step surface of the axis 5. The upper end face of the axis 5 is higher than the upper end face of the fan blade by a set distance, and then laser welding is performed between the outer side of the circumference of the axis 5 and the upper end of the center hole of the fan blade.

Claims

1. A fan bearing system with a stable axis, characterized in that: The invention comprises a shaft sleeve (1), a plane bearing (2), a plane rotating sheet (3), a main bearing (4) and an axis (5), wherein the main bearing is fixedly installed in the shaft sleeve, the axis used for being fixedly connected to the fan blade is rotatably inserted in the main bearing, a plane rotating sheet is fixedly sleeved on the circumferential outer surface of one end of the axis away from the fan blade, the plane bearing is fixedly installed on the inner side of the lower end of the shaft sleeve, and the plane bearing is supported on the lower end surface of the plane rotating sheet, the plane bearing is a plane annular structure, and a plurality of first oil grooves (6) are formed on the surface of one end of the plane bearing facing the plane rotating sheet, which spirally extend from the outer diameter to the inner diameter, and the first oil grooves are filled with bearing oil. At least one axial end face of the main bearing is a smooth plane (7) or a plane formed with a second oil groove (8), the second oil groove is filled with bearing oil, and a plurality of second oil grooves spirally extend from the outer diameter of the main bearing to the inner diameter direction. The structure of the main bearing fixedly installed in the sleeve is as follows: a T-shaped hole with an upper inner diameter larger than a lower inner diameter is formed on the inner side of the sleeve, the main bearing is inserted into the T-shaped hole, the lower end of the bearing is tightly against a step surface formed between the two ends of the sleeve, a fixing ring (9) is fixedly inserted into the inner side of the sleeve opening, the fixing ring is tightly against the upper end face of the main bearing, and a buffer plate (10) is also provided, the buffer plate is tightly clamped between the upper end face of the main bearing and the lower end face of the fixing ring.

2. The fan bearing system with stable axis according to claim 1, characterized in that: The width of the first oil groove gradually narrows from the outer radial direction to the inner diameter direction of the plane bearing, and the width of the second oil groove gradually narrows from the outer radial direction to the inner diameter direction of the main bearing.

3. The fan bearing system with stable axis according to claim 1, characterized in that: The depths of the first oil groove and the second oil groove are both less than 0.2 mm.

4. The fan bearing system with stable axis according to claim 1, characterized in that: The main bearing is an oil-containing bearing, a machined bearing or a ceramic bearing.

5. The fan bearing system with stable axis according to claim 1, characterized in that: There is a set gap between the lower end of the shaft core and the bottom surface of the shaft sleeve.

6. The fan bearing system with axial stability according to claim 1, characterized in that: The axis and the plane rotating piece are fixedly connected by interference fit or laser welding, and the plane bearing is assembled to the bottom of the sleeve by interference fit or gluing.

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