KR20000039553A - Compact fan structure having sleeve bearing - Google Patents

Abstract

PURPOSE: A compact fan structure having a sleeve bearing is provided to prevent leakage of oil from permeating out from the sleeve bearing due to the rotation of a wing part by providing a lid to an end part of the main body and a felt between the sleeve bearing and the main body, and re-supply oil absorbed by the felt by a difference of pressure from an inner part of the main body, thereby reducing noise. CONSTITUTION: A compact fan structure having a sleeve bearing includes a protruded main body(11) vertically mounted on a supporting plate(10), a sleeve bearing(12) mounted in the main body, and a wing(20) of which rotation shaft(21) is rotatably mounted in the main body to rotate the wing by a change of magnetic power in the supporting of the sleeve bearing, wherein the main body is provided with a felt(22) with a predetermined distance between an internal end part of the main body and the sleeve bearing and a lid(23) at an end part thereof.

Description

Compact fan structure with sleeve bearing

The present invention relates to a compact fan structure having a sleeve bearing, and more particularly, having a felt and a stopper at the tip of the body on which the sleeve bearing is mounted, to prevent leakage of oil impregnated in the sleeve bearing to the outside along the axis of rotation. By recirculation, the present invention relates to a compact fan structure having a sleeve bearing which can not only extend the service life but also increase the quietness.

Generally, a bearing is a general term for a mechanical element subjected to a load acting on a rotating shaft while supporting a rotating shaft which rotates or reciprocates. The bearing is manufactured in various ways depending on the direction in which the load is applied or the movement of the rotating shaft surface and the bearing inner surface. Doing.

In particular, the classification according to the movement between the surface of the rotating shaft and the bearing inner surface is generally divided into two types. It can be divided into a roller bearing with a rotating body inserted therein.

As described above, ball bearings and sleeve bearing types are applied to a small fan used for cooling in a computer or general home appliance among various types of bearings.

The small fan includes a support plate 100 composed of a plate body having a predetermined size as shown in the accompanying drawing 1 and configured to allow air to flow through the center, and a body 110 formed perpendicular to the center of the support plate 100. Rotating shaft 210 is inserted into the blade 200 is rotated by the magnetic force change.

In particular, the body 110 is provided with a sleeve bearing 120 in contact with the rotating shaft 210, the sleeve bearing 120 is responsible for the rotational support of the wing.

The sleeve bearing 120 is a bearing supporting a load by friction between the rotating shaft 210 and the inner surface of the bearing. The sleeve bearing 120 uses an oil-impregnated bearing to reduce friction and leaks of oil. O-rings are used at the end of the body to prevent this.

However, the conventional sleeve bearing has linear contact with the rotating shaft and the bearing inner surface, which are the general characteristics of the bearing, so that the oil escapes to the outside of the body when the rotating shaft rotates, resulting in greater frictional force. Somewhat falling problems have arisen.

The present invention has been made in view of this point, and the oil impregnated in the sleeve bearing does not escape from the body in which the bearing is installed, and also enables the oil to be supplied back to the bearing along the rotational axis, thereby providing a smooth oil supply. The purpose of this invention is to provide a compact fan structure with a sleeve bearing that can extend the service life of the sleeve bearing, as well as prevent leakage of oil and direct contact between the rotating shaft and the bearing inner surface, which can significantly reduce noise and vibration. have.

In order to achieve the above object, the present invention is provided with a sleeve bearing inside the body protruding perpendicular to the center of the support plate, the sleeve is equipped with a rotating shaft of the blade so that it can rotate by the change of magnetic force while being supported by the sleeve bearing In the fan structure having a bearing, the body is provided with a felt to have a predetermined distance between the inner end and the sleeve bearing, the end is characterized in that the end is closed with a lid.

1 is a perspective view showing a fan with a conventional sleeve bearing,

2 is an exploded perspective view showing the configuration of a fan having a sleeve bearing according to the present invention;

3 is a cross-sectional view showing a fan according to the present invention.

<Description of the code | symbol about the principal part of drawing>

10. 100: support plate 11, 110: body

12, 120: sleeve bearing 20, 200: wing

21, 210: rotating shaft 22: felt

23: lid

Hereinafter, with reference to the accompanying drawings showing the configuration of a fan having a sleeve bearing according to the invention in more detail as follows.

The present invention is inserted into the rotary shaft 21 of the blade 20 in the sleeve bearing 12 installed perpendicular to the body 11 formed in the center of the support plate 10, the magnetic force generated by receiving power from the outside In a typical small fan structure rotated by change, the tip of the sleeve bearing 12 provided to support the rotation of the rotary shaft 21 is closed with a lid 23 to prevent oil from leaking to the outside, The felt 22 is inserted between the lid 23 and the sleeve bearing 12 so that oil leaked into the sleeve bearing can be absorbed and recycled without being discharged to the outside.

In more detail, the body 11 is formed in a cylindrical shape to support the sleeve bearing 12 by inserting it therein, and the length of the body 11 is formed to be slightly longer than that of the sleeve bearing 12.

In the body 11, the sleeve bearing 12 impregnated with lubricating oil is inserted and installed, and the rotation shaft 21 is fitted in the center thereof. In this case, between the front end of the sleeve bearing 12 and the end of the body 11 is inserted. The predetermined space portion is formed in the.

In the present invention, the felt 22 is inserted into the space portion to absorb the oil leaking from the sleeve bearing 12, and the lid 23 is attached to the end of the body 11 from the sleeve bearing 12. It is to prevent the oil leaked out of the body (11) to be discharged.

At this time, the felt 22 and the lid 23 is used to form a through hole 24 in the center thereof, the rotary shaft 21 is fitted into the through hole 24.

Here, the felt 22 is used to make a thick cloth by mechanically rubbing the wool fibers such as wool in a wet state, this felt is oil that oozes out of the sleeve bearing in response to the heat generated by the rotation of the shaft Will absorb.

Hereinafter, the operational effects of the present invention will be described with reference to the accompanying drawings.

In the fan structure of the present invention, when the blade 20 rotates, the sleeve bearing 12 and the rotating shaft 21 are rotated and supported by friction due to line contact, and at this time, the wear of the sleeve bearing 12 The impregnated oil will leak out.

The oil that leaks out in the longitudinal direction along the rotating shaft 21, the felt 22 is to absorb this oil so that it can no longer escape outward.

At this time, the lid 23 is to assist the function of the felt 22, to prevent the oil not absorbed by the felt 22 is discharged to the outside of the body 11 to further enhance the lubrication effect.

On the other hand, the oil absorbed by the felt 22 is introduced into the sleeve bearing 12 again by the capillary phenomenon, which is the body (as the oil is drawn out of the body 11 by the rotation of the rotating shaft 21) A pressure difference is generated between the inside and the outside of 11), and oil is re-introduced into the rotation shaft 21 by the pressure difference.

Tables 1 and 2 below show the results of simultaneously operating the fan with a felt 22 and the lid 23 and a conventional fan (fan with an oil ring) according to the present invention under the same conditions.

Table 1

division One 2 3 4 5 6 7 8 9 10 98/2/1 electric current 0.150 0.158 0.153 0.155 0.154 0.152 0.154 0.154 0.159 0.157 RPM 2130 2091 2110 2060 2088 2070 2200 2110 2120 2170 noise ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ 98/2/6 electric current 0.150 0.154 0.150 0.149 0.152 0.148 0.151 0.148 0.156 0.152 RPM 2220 2260 2190 2200 2160 2170 2190 2180 2100 2190 noise ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ 98/2/9 electric current 0.147 0.153 0.149 0.144 0.150 0.143 0.149 0.152 0.150 0.154 RPM 2210 2190 2190 2290 2170 2280 2260 2080 2240 2190 noise ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ 98/2/14 electric current 0.144 0.154 0.150 0.142 0.150 0.143 0.147 0.145 0.145 0.149 RPM 2300 2230 2210 2340 2200 2260 2270 2230 2320 2260 noise ○ ○ ○ ○ ○ ○ ○ ○ ○ ○

division One 2 3 4 5 6 7 8 9 10 98/3/5 electric current 0.135 0.146 0.144 0.140 0.144 0.137 0.141 0.143 0.148 0.146 RPM 2400 2330 2280 2350 2240 2300 2320 2210 2280 2270 noise ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ 98/4/14 electric current 0.136 0.146 0.139 0.140 0.141 0.143 0.141 0.142 0.140 0.147 RPM 2420 2350 2330 2290 2280 2270 2350 2220 2390 2270 noise ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ 98/5/20 electric current 0.145 0.142 0.140 0.144 0.143 0.143 0.143 0.143 0.144 0.147 RPM 2400 2410 2380 2260 2260 2230 2330 2230 2330 2260 noise ○ ○ ○ ○ ○ ○ ○ ○ ○ ○

TABLE 2

division One 2 3 4 5 6 7 8 9 10 98/2/1 electric current 0.157 0.156 0.158 0.156 0.155 0.153 0.152 0.155 0.154 0.152 RPM 2110 2150 2080 2120 2070 2120 2130 2045 2100 2110 noise ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ 98/2/6 electric current 0.150 0.158 0.157 0.158 0.158 0.158 0.157 0.155 0.154 0.156 RPM 2220 2110 2190 2130 2160 2160 2100 2120 2180 2150 noise 0 0 ○ ○ ○ ○ × 0 ○ ○ 98/2/9 electric current 0.155 0.152 0.155 0.156 0.157 0.158 0.159 0.160 0.156 0.157 RPM 2170 2160 2210 2140 2150 2080 2110 2170 2160 2150 noise × × ○ ○ ○ × × ○ ○ ○ 98/2/14 electric current 0.153 0.152 0.154 0.157 0.158 0.157 0.156 0.156 0.155 0.155 RPM 2230 2210 2250 2170 2190 2190 2190 2170 2230 2190 noise × × ○ ○ ○ × × ○ ○ ○

division One 2 3 4 5 6 7 8 9 10 98/3/5 electric current 0.145 0.147 0.149 0.147 0.149 0.148 0.152 0.149 0.148 0.147 RPM 2300 2240 2290 2270 2280 2300 2210 2290 2300 2270 noise × × ○ ○ ○ × × ○ ○ ○ 98/4/14 electric current 0.144 0.142 0.149 0.148 0.147 0.147 0.149 0.146 0.146 0.138 RPM 2320 2320 2300 2220 2320 2320 2260 2320 2480 2260 noise × × ○ ○ ○ × × × ○ ○ 98/5/20 electric current 0.147 0.141 0.150 0.153 0.150 0.146 0.151 0.148 0.143 0.150 RPM 2300 2420 2270 2240 2270 2250 2220 2320 2400 2270 noise × × ○ ○ ○ × × × ○ ○

Here, Table 1 and Table 2 is a small fan according to the present invention to measure the current, RPM and noise generation 10 times, Table 2 is a small fan adopting the O-ring method (conventional production method). It is the result measured about ten samples on the same conditions as the small pan of this invention. The measured values were obtained from seven measurements between February 1, 1998 and May 20, the same year.

Therefore, the measurement using the felt according to the present invention does not generate noise even if it rotates for a long time at high temperature, there is no noise, but the fan adopting the 0-ring method has a line between the bearing and the shaft shaft due to the oil leakage over time It can be seen that the noise caused by the contact.

As described above, the present invention provides a felt between the sleeve bearing and the body on which it is installed, and includes a lid at the tip of the body, so that oil leaking from the sleeve bearing by the rotation of the blade is absorbed by the felt to prevent oil leakage. In addition, the oil absorbed in the felt can be re-supplied again by the pressure difference with the inside of the body is to reduce the noise.

Claims (1)

The sleeve bearing 12 is provided in the body 11 protruding perpendicularly to the center of the support plate 10, and the blade 20 is rotated by magnetic force change while receiving the support of the sleeve bearing 12. In the fan structure having a small sleeve bearing to which the rotating shaft 21 is mounted, The body 11 is provided with a felt 22 to have a predetermined gap between the inner end and the sleeve bearing 12, the end of which has a sleeve bearing, characterized in that the lid 23 is closed Mini fan structure.