CN2330427Y - Combined bearing - Google Patents
Combined bearing Download PDFInfo
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- CN2330427Y CN2330427Y CN 97230831 CN97230831U CN2330427Y CN 2330427 Y CN2330427 Y CN 2330427Y CN 97230831 CN97230831 CN 97230831 CN 97230831 U CN97230831 U CN 97230831U CN 2330427 Y CN2330427 Y CN 2330427Y
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- bearing
- spherical
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Abstract
The utility model relates to a combined bearing which comprises a radial thrust bearing, four rows of cylindrical roller bearings, clamping sleeves, a spherical pad, a sealing ring component, etc. The utility model is characterized in that the radial thrust bearing is replaced by a two-way thrust ball bearing whose a fixing ring is clamped by the clamping sleeves 4, 5; the inner spherical surface of the clamping sleeve 4 contacts the outer spherical surface of the end surface of one outer ring of the four rows of cylindrical roller bearings, and has the same spherical radius SR1 with the outer spherical surface; the outer spherical surface of the clamping sleeve 5 contacts the inner spherical surface of the spherical pad and has the same spherical radius SR2 with the inner spherical surface of the spherical pad; a moving ring of the two-way thrust ball bearing is pressed on the end surface of an inner ring of the four rows of cylindrical roller bearings by nuts and sleeves.
Description
The utility model relates to a kind of milling train combination bearing, is particularly useful for the radially combination bearing of thrust ball bearing one four-line column roller bearing of strip, wire rod and bar and shape mill roll bearing.
Prior art as shown in Figure 1, the radial and axial of roll 1 supported by four-line column roller bearing 2 and four-point contact ball 3 respectively.Owing in real work,, usually influence machine life and production because of ablation, the inefficacy that exists radial interference to produce bearing as the four-point contact ball 2 of thrust ball bearing radially.Once filed an application " a kind of four 1 row combination bearings " (application number is 97249439.1) in view of this.But still exist the problem of the following stated need do further improvement.
1. because four-point contact ball is a kind of radial-thrust bearing, it can bear simultaneously and radially reach axial load.During the supporting use of it and journal bearing one four-line column roller bearing, the radial interference problem is arranged.For fear of radial interference, leave the gap between the external diameter of four-point contact ball and box body hole or bearing bore diameter and the axle, promptly four-point contact ball is used as thrust bearing fully, though avoided mutual radial interference on certain program, problem does not solve yet fully.
2. rolling mill bearing is owing to work under heavy duty and hot conditions, therefore bearing clearance is all selected higher value, generally in 0.3 millimeter, so four-line column roller bearing is because the existence in gap, the axis of its bearing outer ring and the axis of inner ring do not overlap when work, and the distance between two axial lines is a bearing end-play half.And four-point contact ball is when bearing responsive to axial force, at first produce and move axially, treat to eliminate fully end play (also having eliminated radial clearance) afterwards, the steel ball of 360 ° of scope inner bearings of circumference and raceway only be 2 contact conditions with the Internal and external cycle raceway could operate as normal.This moment, the axis of bearing outer ring and inner ring overlapped owing to the elimination of bearing clearance, can therefore produce two kinds of situations owing to the difference that is contained in the two kinds of bearing normal operating conditions requirement on the roll neck:
1) (see figure 1) when radial load Pr is very big.Four-line column roller bearing 2 contacts with raceway at the loading zone roller, has the gap between non-loading zone roller and raceway.Because the axial force that four-point contact ball 3 bears is little, roll axis can not be back into the needed axial location of four-point contact ball operate as normal, the part steel ball is in 4 contact conditions in the four-point contact ball like this, make steel ball form two one rotating shaft lines, cause bearing to produce to skid strongly and generate heat phenomenon.
2) when radial load Pr very little (when being generally roll) in idle running, and axial force Pa big (owing to the friction between backing roll and the working roll produces), then can produce roll axis turns round by the four-point contact ball normal operation position, this moment, four-line column roller bearing bottom roller and raceway broke away from, and the gap occurred.When next root band steel wool base was nipped, four-point contact ball bore very big radial load on the one hand, produced very big bump on the other hand between the roller of four-line column roller bearing and the raceway.
3. though four-point contact ball and bearing housing body opening leave play, because:
1) the double semi outer rings 3A (see figure 1) of four-point contact ball requires end face to compress work, and general bearing box for rolling mill compresses through ring flange 10 with 8-2 M16 screw.Therefore, frictional force is very big between four-point contact ball and four-line column roller bearing end face, and the four-point contact ball outer ring was both thin narrow and do not have supporting, so strain is very big.Therefore, cycle surface also is difficult to the changing of the relative positions under impact loading, only produces distortion in the outer ring.
2) external cause that moves because of four-point contact ball (also being external force) is often with very big moment loading, therefore hinders at 4 and moves mutually with four row cylindrical bearing end faces.Because four-point contact ball participates in radially carrying, not only reduced the life-span of itself, make load skewness between the four-line column roller bearing raceway, strengthened the shock loading of four-line column roller bearing simultaneously, thereby reduced its life-span.
Shortcomings such as the purpose of this utility model is to overcome interference mutually between aforesaid bearing exactly, the life-span is low, axial carrying capacity is low, and then the combination bearing that a kind of bearing capacity is big, the life-span is high, cost is low is provided.
The purpose of this utility model is realized by following technical scheme:
A kind of combination bearing is specially adapted to strip and wire rod, the backing roll of bar and shape mill and working roll supporting combination bearing, comprise radial-thrust bearing, four-line column roller bearing, gripping sleeve, ball ring and seal ring assembly etc., it is characterized in that radial-thrust bearing is replaced by double-direction thrust ball bearing 3, and the circle of deciding of double-direction thrust ball bearing is clamped by gripping sleeve 4,5, the Internal Spherical Surface 4-3 of gripping sleeve 4 contacts with the spherical outside surface 2-5 of a cycle surface of four-line column roller bearing 2, and has identical spherical radius SR
1, the spherical outside surface 5-3 of gripping sleeve 5 contacts with the Internal Spherical Surface 6-1 of ball ring 6, and has identical spherical radius SR
2, the moving-coil of double-direction thrust ball bearing 3 relies on nut 8, cover 7 to compress with the end face of four-line column roller bearing inner ring 2-1.
The purpose of this utility model can also further be realized by following technical measures:
Aforesaid bearing, radius are SR
1And SR
2The centre of sphere of two pairs of spheres meet at 1 O on the axis of four-line column roller bearing 2 and double-direction thrust ball bearing 3.
Aforesaid bearing, radius are SR
1And SR
2One of two pairs of its inside and outside spherical surfaces of sphere be taper seat.
Aforesaid bearing, radius are SR
1And SR
2Two pairs of its inside and outside spherical surfaces of sphere be taper seat.
Aforesaid bearing is not established seal ring assembly 1.
It is that moving-coil and centre circle 3-2 are that the two kind structures of 3-1 for fixed circle are enclosed at moving-coil, two ends for fixed circle, two ends circle 3-1 that aforesaid bearing, double-direction thrust ball bearing 3 have centre circle 3-2; In three circles, the moving-coil internal diameter is the standard rolling bearing internal diameter, surely enclose internal diameter and external diameter and be non-fit diameter, the internal diameter 5-20 millimeter of the end circle 3-1 that its internal diameter encloses surely less than two conducts when centre circle 3-2 is moving-coil, when centre circle 3-2 when enclosing surely its external diameter greater than two external diameter 10-20 millimeters as the end circle 3-1 of moving-coil.
The utility model has the advantages that:
1. owing to adopt the combination bearing of journal bearing (being four-line column roller bearing) and two-way thrust ball bearing, avoided bearing mutual interference and to radially with the harmful effect in thrust bearing life-span.
2. thrust bearing is bigger than the axial carrying capacity of four-point contact ball, and its life-span is about 2-3 times of the latter.
3. thrust ball bearing low price, half that is about four-point contact ball is main right.
4. in this combination bearing, there is not sphere on the thrust ball bearing circle, so handling ease, and parts such as gripping sleeve, ball ring, cover are not consumable accessorys, can use for a long time.They both can be bought to Bearing Factory with the combination bearing form, also can buy four-line column roller bearing and double-direction thrust ball bearing separately to Bearing Factory, and were with the combination of parts oneself such as existing gripping sleeve, ball ring, cover, therefore easy to use.
5. when roller declination, bearing housing rotate, because two pairs of relative motions between the sphere are arranged, and avoided moment loading, improved the life-span of bearing significantly.
Below in conjunction with Figure of description and embodiment, the utility model is described in further detail:
Fig. 1 is rolling mill roll supporting and bearing arrangement schematic diagram and a stressing conditions in the prior art.
Fig. 2 is the schematic diagram of one of combined bearing structure that the utility model adopted.
Fig. 3 is two schematic diagram of combined bearing structure that the utility model adopted.
Embodiment:
Embodiment one
Fig. 2 is one of the utility model embodiment, the combination bearing that four-line column roller bearing of using for the backing roll that is suitable for four roll strip milling trains and double-direction thrust ball bearing etc. are formed.It comprises seal ring assembly 1, four-line column roller bearing 2, double-direction thrust ball bearing 3, gripping sleeve 4,5, ball ring 6 and overlaps 7 etc.Seal ring assembly 1 is formed by the outer ring 1-1 with certain elasticity (end face of outer ring has groove 1-5, forms to be similar to disk spring) and with screw 1-3 annulus 1-2 and sealing ring 1-4 fixed thereon.Seal ring assembly 1 contacts the hermetically-sealed construction of forming combination bearing with four-line column roller bearing inner ring 2-1.Four-line column roller bearing (is called for short four row bearing, down with) be with the outer ring 2-2 of ribs, two retainer 2-3 and four-row cylindrical roller 2-4 to form by no rib inner ring 2-1 and two, the end face of one of them outer ring makes sphere 2-5, inner ring 2-1 is the standard rolling bearing endoporus, with roll pins having be interference fit.Double-direction thrust ball bearing 3 has replaced traditional radially thrust ball bearing (routine four-point contact ball) structure, two end circle 3-1 is as moving-coil, bearing bore diameter with standard, be contained on the roll pins having with interference fits, its end face leans against respectively on the end face of the end face 2-6 of inner ring 2-1 and axle sleeve 7, compresses with nut 8.(be called for short thrust ball bearing) centre circle 3-2 is as fixed circle down together, and external diameter does not all have cooperation in it, leaves the gap for double-direction thrust ball bearing.Surely enclose external diameter greater than two moving inner ring external diameter 10-20 millimeters, clamping area 4-2, the 5-2 of the clamped cover 4,5 of its both ends of the surface clamp.Clamping area 4-2,5-2 are respectively perpendicular to the sphere 4-3 of gripping sleeve 4 and 5 and the axis of symmetry of 5-3.The Internal Spherical Surface 4-3 of gripping sleeve 4 has identical spherical radius SR with the spherical outside surface 2-5 of a cycle surface of four row bearing 2
1, and contact each other, the spherical outside surface 5-3 of gripping sleeve 5 has identical spherical radius SR with the Internal Spherical Surface 6-1 of ball ring 6
2, and contact each other, and compressed by bearing housing end cap 10.
The centre of sphere of above-mentioned two pairs of spheres that contact with each other is handed on 1 O on the axis of four row bearing 2 and thrust ball bearing 3.
When milling train produces roller declination or bearing housing rotation when working, two groups of sphere generation relative displacements are vertical with roll axis with the end face that guarantees double-direction thrust ball bearing, make the centre circle 3-2 (this example is fixed circle) of thrust ball bearing avoid bearing moment loading, whole steel ball rollers are contacted well with raceway.
For the ease of processing, reduction manufacturing cost, spherical radius is SR
1And SR
2Two groups of spheres in spherical outside surface and Internal Spherical Surface both one of or all can make the taper seat form.
Embodiment two
Fig. 3 is two the structure chart of the utility model embodiment, for being used for four roll strip operation roll of mill with the combination bearing of four-line column roller bearing with the double-direction thrust ball bearing composition.
Combination bearing is also by four bad roller bearings 2, double-direction thrust ball bearing 3, gripping sleeve 4,5 and overlap 7 etc. and form, but do not establish seal ring assembly 1.In addition, be centre circle 3-2 with double-direction thrust ball bearing as moving-coil, its internal diameter is that standard rolling bearing internal diameter and roll pins having are interference fits, the little 5-20 millimeter of end circle 3-1 that the internal diameter of moving-coil encloses surely than two conducts.Rely on nut 8 will overlap 7, the thrust ball bearing moving-coil, again through another set of 7 and inner ring 2-1 be pressed on the roll shaft shoulder.Clamping area 4-2, the 5-2 that two of thrust ball bearing 3 encloses gripping sleeve 4, the 5 surely axis of symmetry with sphere 4-3, the 5-3 of gripping sleeve respectively is vertical.The Internal Spherical Surface 4-3 of gripping sleeve 4 has identical spherical radius SR with the spherical outside surface 2-5 of four row bearing
1And contact with each other, the spherical outside surface 5-3 of gripping sleeve 5 has identical spherical radius SR with the Internal Spherical Surface of ball ring 6
2, and contact each other, they are compressed by bearing housing end cap 10, and thrust is regulated by changing the adjusting pad thickness.In addition, spherical radius is SR
1And SR
2The centre of sphere of two pairs of spheres meet at 1 O on the axis of four-line column roller bearing and double-direction thrust ball bearing equally.There is 1-2 millimeter gap in the cylindrical of gripping sleeve 4,5 and bearing housing hole on diameter.
During milling train work, when roller declination or bearing housing rotation, sphere 2-5 is relative with the 5-2 intercropping with 4-2,6-1, and slip is vertical with roll axis with the end face that guarantees thrust ball bearing 3, makes the centre circle of thrust ball bearing avoid bearing moment loading, makes whole steel balls and raceway be the excellent contact state.
For the ease of processing, spherical radius is SR equally
1With SR
2Two groups of spheres in, spherical outside surface and Internal Spherical Surface both one of or whole available taper seat replace.
Claims (6)
1. combination bearing, be particularly suitable for the backing roll and the working roll supporting combination bearing of strip and wire rod, bar and shape mill, comprise radial-thrust bearing, four-line column roller bearing, gripping sleeve, ball ring and seal ring assembly etc., it is characterized in that radial-thrust bearing is replaced by double-direction thrust ball bearing (3), and the circle of deciding of double-direction thrust ball bearing is clamped by gripping sleeve (4), (5), the Internal Spherical Surface (4-3) of gripping sleeve (4) contacts with the spherical outside surface (2-5) of a cycle surface of four-line column roller bearing (2), and has identical spherical radius SR
1, the spherical outside surface (5-3) of gripping sleeve (5) contacts with the Internal Spherical Surface (6-1) of ball ring (6), and has identical spherical radius SR
2, the moving-coil of double-direction thrust ball bearing (3) relies on nut (8), cover (7) to compress with the end face of four-line column roller bearing inner ring (2-1).
2. bearing according to claim 1 is characterized in that spherical radius is SR
1And SR
2The centre of sphere of two pairs of spheres meet at 1 O on the axis of four-line column roller bearing (2) and double-direction thrust ball bearing (3).
3. bearing according to claim 1 is characterized in that spherical radius is SR
1And SR
2Two pairs of spheres, one of its inside and outside spherical surface is a taper seat.
4. bearing according to claim 1 is characterized in that spherical radius is SR
1And SR
2Two pairs of spheres, its inside and outside spherical surface is taper seat.
5. bearing according to claim 1 is characterized in that not establishing seal ring assembly (1).
6. according to the described bearing of claim 1 to 5, it is characterized in that it is that moving-coil and centre circle (3-2) are fixed two kinds of structures of enclosing for moving-coil, two ends circles (3-1) for fixed circle, two ends circles (3-1) that double-direction thrust ball bearing (3) has centre circle (3-2); In three circles, the moving-coil internal diameter is the standard rolling bearing internal diameter, encloses internal diameter and external diameter surely and is non-fit diameter; When centre circle (3-2) is moving-coil, the internal diameter 5-20 millimeter of the end circle (3-1) that its internal diameter encloses surely less than two conducts, when centre circle (3-2) when enclosing surely, its external diameter is greater than two external diameter 10-20 millimeters as the end circle (3-1) of moving-coil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97230831 CN2330427Y (en) | 1997-12-26 | 1997-12-26 | Combined bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97230831 CN2330427Y (en) | 1997-12-26 | 1997-12-26 | Combined bearing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2330427Y true CN2330427Y (en) | 1999-07-28 |
Family
ID=33943234
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97230831 Expired - Fee Related CN2330427Y (en) | 1997-12-26 | 1997-12-26 | Combined bearing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2330427Y (en) |
-
1997
- 1997-12-26 CN CN 97230831 patent/CN2330427Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |