CN200975361Y

CN200975361Y - Improved fan bearing structural body

Info

Publication number: CN200975361Y
Application number: CN 200620157753
Authority: CN
Inventors: 黄敬宏; 高志宗
Original assignee: Xinju Enterprise Co Ltd
Current assignee: Zippy Technology Corp
Priority date: 2006-11-09
Filing date: 2006-11-09
Publication date: 2007-11-14
Anticipated expiration: 2016-11-09

Abstract

The utility model relates to an improved fan spindle bearing structure which makes use of a bearing of the rotating fan and a slewing axis arranged inside the bearing. The bearing and the inner touching circumferential of the slewing axis form a first air cell and a second air cell with different section surface. The lubricant whose oil film tension is larger than the inner static pressure of the second air cell is positioned in the first air cell to locate the slewing axis according to the inner static pressure of the first and the second air cells and the oil film tension of the lubricant when the slewing axis is arranged in the bearing. The pressure difference between the first air cell and the second air cell pushes the lubricant to the second air cell according to the Bernoulli theorem, and forms an oil film therefore the slewing axis entity rotates without touching the bearing to reach the aim of little friction and loss by supporting the rotation of the oil film.

Description

Improved fan spindle bearing structure

Technical field

The utility model relates to a kind of improved fan spindle bearing structure, especially for the bearing structure of the lubricated fan shaft of carrying.

Background technique

Bearing is used for the weight of back shaft, and the parts of the motion of leading axle, and axle is called axle journal with the part of bearing support.Friction between axle journal and the bearing can make a large amount of power losses and damage bearing, therefore, when inquiring into bearing, must consider the method for reducing friction and the stress of every axle center generation, all take, therefore need have enough intensity and lubricated fully by bearing.

Bearing of a great variety, common ball bearing, liquid bearing and the ceramic bearing of mainly being divided into, modal is exactly ball bearing, it is to utilize 8 to 12 steel balls to support the weight of motor, that is to say, its rotation will produce the friction of metal surface, and steel ball will produce wearing and tearing (run out) when rotating.This specific character causes the bottleneck on the ball bearing purposes along with motor rotary speed is more and more higher.

The maximum differential of liquid bearing and ball bearing, be that liquid bearing uses oil film to replace traditional steel ball, shown in first figure, traditional bearing 11 inner edges in the sleeve 3 adhere to one deck oil film, it is smooth and easy that running shaft 1 can be rotated, flabellum 4 works done to the other end, and desirable liquid bearing is with oil film supporting rotating shaft 1, not direct contact bearing, that is to say that desirable liquid bearing Metal Contact can't occur when rotating, just do not have wear problems in theory, so liquid bearing has absorbing vibration than ball bearing, advantages such as it is low to wear and tear, but, still need constantly depositing and lubricated mechanism of its oiling agent of improvement in order to reach desirable " not having wearing and tearing " state of liquid bearing; Previous liquid bearing model utility such as TaiWan, China are announced No. 505208 " oil-impregnated bearing structure improvement ", its technological means is the room that improvement has a hollow for this bearing, and oil absorbent material of this room storing is filled lubricant oil, so that the lubricated of rotating shaft to be provided, the central authorities of this model utility have good lubricating, but the surface of contact lubrication effect of bearing two ends and rotating shaft obviously reduces; Similar model utility and for example TaiWan, China is announced No. 350495 " Oil-storage bearing structure ", be at bearing, form an oil storage space between the card door bolt of sleeve and sleeve, thereby hold more lubricant oil, and replenish often, though oil mass is enough, but can not guarantee the balanced mechanism of scattering of lubricant oil, may will cause wearing and tearing unbalanced, long-time and then cause contact surface abrasion between bearing and the axle center, not only can lower running effect and making a noise, in the course of time also can make bearing wear excessive and lose its function, therefore the life-span shortens many and reduces the life-span, and also when the river rises the boat goes up thereupon for manufacture cost; Therefore, how to guarantee that bearing has enough, the balanced lubricated most important problem of design bearing that promptly becomes.

The model utility content

Therefore, the most important purpose of the utility model is, oiling agent balancedly is distributed on the bearing, the wearing and tearing of minimizing and running shaft, and it is minimum that noise and vibrations are dropped to.

Improved fan spindle bearing structure of the present utility model, be at least two first air chambers of this bearing inner circumference edge cutting, and the terminal gap to this bearing lower edge and running shaft of first air chamber forms second air chamber, the sectional area of this first air chamber is greater than the sectional area of second air chamber, utilize the Bai Nuli equation described: the summation of pressure, kinetic energy and potential energy is the physical law of definite value, make this bearing air velocity difference build-up of pressure when rotated poor, the oiling agent that leaves in first air chamber is pushed through second air chamber; And first air chamber utilizes a groove to communicate with an outer air chamber, makes this bearing also can oiling agent be pushed through second air chamber by means of atmospheric pressure when low speed rotation.

Description of drawings

Fig. 1 is traditional embodiment's a decomposing schematic representation.

Fig. 2 is the utility model embodiment's a decomposing schematic representation.

Fig. 3 is the utility model embodiment's a sectional drawing.

Fig. 4 is the utility model embodiment's a bearing plan view.

Fig. 5 is the utility model embodiment's a bearing worm's eye view.

Fig. 6 is another embodiment's of the utility model a decomposing schematic representation.

Fig. 7 is another embodiment's of the utility model a sectional drawing.

Embodiment

See also Fig. 2 to Fig. 5, the utility model is a kind of improved fan spindle bearing structure, be used to help running shaft 1 when rotating, to reduce friction, make running shaft 1 work doing efficiency higher, the utility model includes a bearing 2 and and is configured in running shaft 1 in this bearing 2, one termination of this running shaft 1 is provided with a flabellum 4, the other end then combines with this bearing 2, wherein this bearing 2 and running shaft 1 contacts first air chamber 21 and second air chamber 22 that inner circumference edge forms at least two different cross-sectional, wherein this first air chamber 21 is extended internally but first profile groove 210 that is not communicated to the other end forms from end face by inner circumference edge, this first air chamber 21 is made of many groups first profile grooves 210 dividing equally the inner circumference edge angle, 22 of this second air chambers are installed the nargin gap with this running shaft 1 with the reservation of this bearing 2 and are formed, the utility model is installed in this bearing 2 in the sleeve 3 in addition, utilize first air chamber 21 of these sleeve 3 sealing larger sectional area, and in this first air chamber 21, insert the oiling agent 5 of oil film tension force at least greater than static pressure in second air chamber 22, so that this running shaft 1 forms the location with the interior static pressure of first air chamber 21 and second air chamber 22 and the oil film tension force of oiling agent 5 when being attached to bearing 2, and form gas-tight state between running

shaft

1 and 22 of second air chambers and bearing 2 and the sleeve 3, oiling agent 5 can't outwards be flowed because of atmospheric pressure, form the oil sealing of nature, avoid oiling agent 5 to run off.

According to the utility model, mainly utilize the Bai Nuli equation described: pressure, the summation of kinetic energy and potential energy is a definite value, and kinetic energy is directly proportional with the quadratic power of flow velocity, when the flow velocity of the air chamber of flowing through littler, the pressure difference principle that the pressure that produces is healed big, therefore, by first of the different big or small sectional areas that form between bearing 2 of the present utility model and the running shaft 1, two

air chambers

21,22, allow this running shaft 1 under stressed rotary state, because the sectional area of first air chamber 21 is greater than second air chamber 22, make the flow velocity of first air chamber 21 of flowing through slower, the pressure that causes first air chamber 21 is greater than second air chamber 22, forcing oiling agent 5 to be pushed by tangent plane to second air chamber 22 with the pressure difference of first air chamber 21 and second air chamber 22 forms the oil film cusp and makes running shaft 1 entity support rotation with the oil film with very big tension force but contact bearing 2 not, and this running shaft 1 extension touches this sleeve 3 bottoms, and be provided with the wear plate 31 that a high-abrasive material is made in these sleeve 3 bottoms, when running shaft 1 rotates, then only there is running shaft 1 end directly to contact with wear plate 31, reaches the purpose of low friction loss thus with the point-contact type attitude.

In addition, the utility model considers that more running shaft 1 is under the low-speed running state, and under the initial position state, because the entity flow velocity does not promote fully as yet and may cause oil film not produce fully as yet, such situation may cause running shaft 1 at first to activate, will contact with bearing 2 and cause wearing and tearing, therefore, the utility model forms the 3rd air chamber 24 in the crack between these bearing 2 outer periphery and this sleeve 3, perhaps the outer periphery at this bearing 2 are provided with the pressure difference of many group second profile grooves 240 with reinforcement the 3rd air chamber 24 and first air chamber 21, and the outer periphery angle that these many group second profile grooves 240 are also divided equally this bearing 2, the 3rd air chamber 24 relies on a plurality of grooves 23 to become connected state with this first air chamber 21, be communicated to the outside by the 3rd air chamber 24, thereby can come the oil film of reinforcement running shaft 1 initial operation to produce by means of the outside atmospheric pressure difference, and can assist the strong fix effect effectively.

Second profile groove 240 that the utility model is not defined for reinforcement the 3rd air chamber 24 and first air chamber, 21 pressure differences must be located at the outer periphery of this bearing 2, as long as can reach the purpose that ambient air is communicated with first air chamber 21, also can be located on flabellum 4 or the sleeve 3; See also Fig. 6 and Fig. 7, another embodiment is located at many groups the 3rd profile grooves 32 of the pressure difference of reinforcement the 3rd air chamber 24 and first air chamber 21 inner circumference edge of this sleeve 3, utilize many groups the 3rd profile grooves 32 of this sleeve 3 to reach the effect of pushing oiling agent 5 with atmospheric pressure equally, make this running shaft 1 have good lubricating effect with bearing 2.

For highlighting progressive of the present utility model, it is as follows to enumerate advantage of the present utility model now:

1. utilize pressure difference to push oiling agent 5, oiling agent 5 is evenly distributed.

2. the balanced merogenesis of the oil film of oiling agent 5 is in second air chamber 22, running shaft 1 is not almost contacted with bearing 2 and do not produce wearing and tearing.

3. because of running

shaft

1 and 22 of second air chambers and

bearing

2 and 3 gas-tight states of formation of sleeve; oiling agent 5 can't outwards be flowed because of atmospheric pressure; form the oil sealing of nature, avoid oiling agent 5 to run off, and the bigger oil film pressure of generation is protected bearing 2 in the running.

4. structure is simpler than previous model utility, saves cost, and is easy to quick production.

The above is a preferred embodiment of the present utility model only, is not limited to model utility.In the above-described embodiments, the utility model can have various changes and variation.All within spirit of the present utility model and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.

Claims

1. improved fan spindle bearing structure includes:

Bearing (2);

Be configured in the running shaft (1) in the described bearing (2);

It is characterized in that, described bearing (2) and running shaft (1) contact first air chamber (21) and second air chamber (22) that inner circumference edge forms at least two different cross-sectional, and on bearing (2), be provided with first air chamber (21) of sleeve (3) with the sealing larger sectional area, and in described first air chamber (21), insert the oiling agent (5) of oil film tension force at least greater than the static pressure in second air chamber (22), make when described running shaft (1) is installed in the bearing (2), with first, two air chambers (21,22) the oil film tension force of Nei static pressure and oiling agent (5) forms the location, and described running shaft (1) is under stressed rotary state, push to second air chamber (22) with the pressure official post oiling agent (5) of first air chamber (21) and second air chamber (22) and to form oil film and make running shaft (1) entity support rotation and contact bearing (2) not, reach the purpose of low friction loss with oil film.

2. improved fan spindle bearing structure according to claim 1 is characterized in that, described second air chamber (22) forms with the installing nargin gap of described running shaft (1) with the reservation of described bearing (2).

3. improved fan spindle bearing structure according to claim 1 is characterized in that, described first air chamber (21) by described bearing (2) inner circumference edge by end face inwardly with first profile groove (210) but be not communicated to the other end and form.

4. improved fan spindle bearing structure according to claim 3 is characterized in that, described first air chamber (21) constitutes with many groups first profile grooves (210) of dividing equally the inner circumference edge angle.

5. improved fan spindle bearing structure according to claim 1, the gap that it is characterized in that described bearing (2) outer periphery and described sleeve (3) forms the 3rd air chamber (24), and described bearing (2) is provided with groove (23), and to make described the 3rd air chamber (24) and described first air chamber (21) be connected state.

6. improved fan spindle bearing structure according to claim 5 is characterized in that, described bearing (2) outer periphery are provided with second profile groove (240) with the pressure difference of reinforcement the 3rd air chamber (24) with first air chamber (21).

7. improved fan spindle bearing structure according to claim 6 is characterized in that, described the 3rd air chamber (24) is made of many groups second profile grooves (240) of equal two-part bearing (2) outer periphery angle.

8. improved fan spindle bearing structure according to claim 5 is characterized in that, described sleeve (3) inner circumference edge is provided with the 3rd profile groove (32) with the pressure difference of reinforcement the 3rd air chamber (24) with first air chamber (21).

9. improved fan spindle bearing structure according to claim 8 is characterized in that, described the 3rd air chamber (24) is made of many groups the 3rd profile grooves (32) of dividing equally sleeve (3) inner circumference edge angle.

10. improved fan spindle bearing structure according to claim 1 is characterized in that, described running shaft (1) extends the described sleeve of contact (3) bottom, and is provided with the wear plate (31) that high-abrasive material is made in described sleeve (3) bottom.