CN203604442U

CN203604442U - Water-lubricated bearing

Info

Publication number: CN203604442U
Application number: CN201320654288.5U
Authority: CN
Inventors: 钱忠; 黄燕红; 尹忠慰; 高耿员; 李正
Original assignee: SHENKE SLIDE BEARING Inc
Current assignee: SHENKE SLIDE BEARING Inc
Priority date: 2013-10-22
Filing date: 2013-10-22
Publication date: 2014-05-21
Anticipated expiration: 2023-10-22

Abstract

The utility model discloses a water-lubricated bearing, which comprises a bearing bush and a journal, the inner surface of the bearing bush is divided into two different arc sections, a major arc section with central angle of greater than 180 degrees takes a bearing center as the center of a circle, a minor arc section with the central angel of less than 180 degrees takes the center of the journal as the center of circle, the minor arc section forms a transition arc on the inner surface of the bearing bush, and a positive pressure region and a negative pressure region which generate acting force to the rotating journal are formed on two sides of the transition arc. The acting force of the positive pressure region and a negative pressure region formed on two sides of the transition arc on the inner surface of the bearing bush to the journal has no mutual offset phenomenon, and the bearing capacity of the water-lubricated bearing can be greatly enhanced.

Description

A kind of water lubriucated bearing

Technical field:

The utility model relates to technical field of bearings, especially relates to a kind of water lubriucated bearing.

Background technique:

Bearing is that machinery works the parts of fixing and reducing load friction factor in mechanical transmission course, and kind is comparatively various.For a long time, sliding bearing is all made up of metal construction conventionally, to use oil as working medium, need to consume a large amount of oil plants and metal material.And in order to prevent the leakage of lubricant oil, also need it to seal, make bearing structure quite complicated, and be difficult to solve the problems such as various friction, vibration, noise, power consumption, reliability and the life-spans that produce because of the motion of friction pair, especially inevitably there is the serious environmental pollution problem bringing because of oil leak.

Can overcome the problems such as the existing environmental pollution of oil-lubricated bearing, on market, also there is the water lubriucated bearing take water as working medium, although compare traditional oil lubrication, water lubriucated bearing has the characteristic of clean and environmental protection, but because the viscosity of water is lower, it is in the time forming hydrodynamic lubrication, and bearing capacity is relatively low.With current common several water lubriucated bearings, the running accuracy of elliptic bearing (see figure 1) is relative with stability better, but because it forms when moisture film, the bearing capacity that upper and lower moisture film produces inevitably exists offseting phenomenon, therefore bearing capacity is relatively little, and power consumpiton is large.Also there is same defect in two oil film wedge dislocation bearings (as shown in Figure 2), if added, bearing is slotted, and weakened again its bearing capacity.Therefore, elliptic bearing and two oil film wedge dislocation bearing, equally as the bearing of two oil film wedges, are not suitable for the occasion that requirement for bearing capacity is higher.How to improve water lubriucated bearing bearing capacity, become the problem that people pay close attention to.

Model utility content:

The purpose of this utility model is just to provide a kind of water lubriucated bearing for the deficiency of prior art existence, and this water lubriucated bearing has feature simple in structure, bearing capacity is large.

For achieving the above object, water lubrication axle of the present utility model, comprise bearing shell and axle journal, described inner surface of bearing bush is divided into two sections of different arc sections, wherein, central angle is greater than the major arc section of 180 degree take bearing centre as the center of circle, and central angle is less than the minor segment of 180 degree take journal centre as the center of circle, minor segment forms the transition arc of inner surface of bearing bush, and the both sides of transition arc form zone of positive pressure and the negative pressuren zone that the axle journal to rotating produces active force.

As technique scheme preferably, active force and the attached nip of the zone of positive pressure of stating to axle journal is less than 90 degree to the angle between axle journal active force.

As technique scheme preferably, smooth transition between described minor segment and major arc section.

As technique scheme preferably, the middle branch of described major arc section center, minor segment center and minor segment is located along the same line.

The beneficial effects of the utility model are: the transition arc both sides of its inner surface of bearing bush form zone of positive pressure and negative pressuren zone, loading ability of bearing is made a concerted effort to be to the maximum of axle journal active force in zone of positive pressure and negative pressuren zone, because zone of positive pressure and negative pressuren zone do not exist the phenomenon of cancelling out each other to the active force of axle journal, therefore can greatly improve the bearing capacity of water lubriucated bearing.

Accompanying drawing explanation:

Below in conjunction with accompanying drawing, the utility model is described further:

Fig. 1 is the end-face structure figure of existing elliptic bearing;

Fig. 2 is the end-face structure figure of existing pair of oil film wedge dislocation bearing;

Fig. 3 is the end-face structure figure of water lubriucated bearing of the present utility model;

Fig. 4 is the pressure-plotting of water lubriucated bearing of the present utility model;

Fig. 5 is the bearing capacity schematic diagram of water lubriucated bearing of the present utility model.

Embodiment:

Therefore the following stated only, for embodying the preferred embodiment of the utility model principle, does not limit protection domain of the present utility model.

Water lubriucated bearing of the present utility model, comprises bearing shell 10 and axle journal 20, and wherein, bearing shell 10 internal surfaces are divided into two sections of different arc sections, and wherein, the major arc section 11(that central angle is greater than 180 degree is the AMB section in Fig. 3) with bearing centre O _bfor the center of circle, its radius is R _b; The minor segment 12(that central angle is less than 180 degree is ANB section in Fig. 3) with the O of journal centre _jfor the center of circle, its radius is R _j; Gap c=R between bearing inner race and axle journal _b-R _j, the throw of eccentric that e is bearing, the eccentric ratio k=e/c of bearing, can change the bearing capacity of bearing by the central angle Φ of appropriate design minor segment 12.

Minor segment 12 forms the transition arc of inner surface of bearing bush, and the both sides of transition arc form zone of positive pressure 13 and it should be noted that with negative pressuren zone 14(: axle journal 20 sense of rotation are when different, zone of positive pressure 13 and negative pressuren zone 14.

Smooth transition between minor segment 12 and major arc section 11; The middle branch of major arc Duan11 center, minor segment 12 centers and minor segment 12 is located along the same line, and that is to say: major arc section 11 and minor segment 12 are all divided into symmetrical two halves by this straight line.

As shown in Figure 5: in the time that axle journal 20 rotates counterclockwise with angular velocity omega, the left side of transition arc is zone of positive pressure 13, and right side is negative pressuren zone 14, and zone of positive pressure 13 is F to the active force of axle journal 20 ₁, negative pressuren zone 14 is F to the active force of axle journal 20 ₂, F ₁and F ₂between angle

be less than 90 degree, both F that makes a concerted effort are greater than F ₁and F ₂, when minor segment 12(transition arc) central angle Φ change time, distributed areas and the shape of zone of positive pressure 13 and negative pressuren zone 14 also will change, F ₁and F ₂between angle also will change, angle

less, the F that makes a concerted effort is larger, that is to say that the bearing capacity of bearing is larger, in the time that other conditions are constant, has minimum angle

time bearing bearing capacity F reach maximum.

Claims

1. a water lubriucated bearing, comprise bearing shell and axle journal, it is characterized in that: described inner surface of bearing bush is divided into two sections of different arc sections, wherein, central angle is greater than the major arc section of 180 degree take bearing centre as the center of circle, central angle is less than the minor segment of 180 degree take journal centre as the center of circle, and minor segment forms the transition arc of inner surface of bearing bush, and the both sides of transition arc form zone of positive pressure and the negative pressuren zone that the axle journal to rotating produces active force.

2. a kind of water lubriucated bearing according to claim 1, is characterized in that: active force and the negative pressuren zone of described zone of positive pressure to axle journal is less than 90 degree to the angle between axle journal active force.

3. a kind of water lubriucated bearing according to claim 2, is characterized in that: smooth transition between described minor segment and major arc section.

4. a kind of water lubriucated bearing according to claim 3, is characterized in that: the middle branch of described major arc section center, minor segment center and minor segment is located along the same line.