JPS607877Y2 - Support bearing for link lever in vibration device of strand casting mold - Google Patents

Description

[Detailed description of the invention] The present invention relates to a support bearing for a link lever in a vibration device for a strand casting mold, and the support bearing is a bearing in which a rotating shaft for transmitting lever force is fixed to a member to be pivoted. It is supported by a housing.

This type of support bearing helps to relieve the loads generated when the vibrating table vibrates with the strand casting mold while avoiding sliding friction.

In this case, very high requirements are placed on the bearings in order to achieve the most precise guidance possible and the longest possible operating time of the vibrating device.

This precision is necessary in order to be able to adhere to the defined rocking path, which determines the surface quality of the cast strand.

The required length of service life emerges from the standard operating requirements to permit minimal maintenance times for normal turn-around operations in foundries.

Known support bearings consist of plain bearings or roller bearings, the properties of which do not meet the particular requirements of a rocking bearing member.

A particular disadvantage of these bearings, which impairs their precision and service life, is manifested in the fact that the relatively mutually rotating parts of the rotating shaft or bearing link rotate only slightly.

For 360° around the axis of rotation, this rotational movement generally amounts to approximately 1° for a corresponding lever length of the vibrating rond.

A particular disadvantage is that during slight circumferential movements, the lubrication by lubricating media such as grease, graphite, oil mist, etc. is insufficient, which does not solve the problem at all.

The lack of lubrication is substantially caused by the scales, which in both plain and roller bearings act only in the form of point contact.

From the drawbacks mentioned above, it is readily apparent that the service life is insufficient, that is, the bearing surfaces wear out too quickly, as well as the insufficient precision of this type of bearing.

The problem underlying the invention is to provide a support bearing without using conventional plain or roller bearings, which has not only higher precision and a longer service life, but also There are also further advantages with regard to the maintenance work that must be carried out.

In this invention, the rotating shaft has limited elasticity that matches the hardness of the force generated during mold vibration, is fitted into a material that has vibration damping properties, and is supported by a bearing housing. , has solved the problem presented.

At the same time, the solution according to the invention also eliminates the lubrication problem.

Another advantage is that the precision is clearly greater, since the bearing clearances known from plain or roller bearings are completely eliminated.

Another advantage of the invention consists in the principle of avoiding wear between bearing parts that move relative to each other.

After all, when applying the support bearing according to the invention, there is no longer any reason to carry out special maintenance work, ie the support bearing according to the invention does not actually require maintenance.

An embodiment of the invention is shown schematically in the drawing and will be explained in detail below.

The vibrating table 1 generally supports a strand casting mold (not shown in detail) and moves the object in a vertical or curved oscillation.

Steel strand casting equipment for cast strand slabs has a weight of more than 20 mega-pounds for the vibrating table 1 including the casting.

For billet strand casting equipment, the vibrating table 1 and mold together reach a weight of up to 10 megalbs.

The support bearing 2 according to the present invention forms a link for a lever 3, and the lever 3 transfers the swinging power from a drive motor (not shown in detail) to the vibration table 1 via an eccentric member or the like.

This supporting bearing 2 has a bearing housing 4 and a rotating shaft 5, which are the main components of the bearing 2.

A plurality of levers 3 (FIG. 2) support the vibrating table 1 and, depending on their identical or different lever lengths, generate only vertical or curved movements for casting curved strands.

All of these levers 3 are pivotally connected in pairs to a pull rod 6, which performs a reciprocating movement 7.

Further, the support bearing 2 has a material 8 having a limited elasticity that matches the hardness to the force generated during casting vibration, and the elastic material 8 is a rubber-like material, such as natural rubber or plastic. Become.

As the loads originating from the central region increase, the elastic material 8 needs to become harder.

Another useful material with elastic properties and rocking damping action 8
In particular, rubbers or rubber compounds of various types are suitable, and metal parts may also be included in the compounds.

This material 8 comprises an external sleeve 1 which may be attached to a vibrating table 1 or a pull bar 6 or a lever 3, for example.
0 and a sleeve 11 which may be attached to the rotating shaft 5, and is installed in the annular space 9 and fixed to each sleeve.

However, the sleeves 10 and 11 are only necessary when the rotating shaft 5 and the bearing housing 4 are not to be directly connected via the elastic material 8.

The direct connection between the components to be connected in a flexible manner, that is, in this embodiment, the vibration table 1 and the rotary shaft 5, the rotary shaft 5 has a polygonal cross section 5b at least in the length 5a of the elastic material 8. This may also be done by (Figure 5).

The rotating shaft 5 has a flat portion 5e on the shaft journal 5c to 5d.
The flat portion 5e is indicated by a cross symbol in FIGS. 5 and 6.

The elastic properties of the material 8 then serve to adjust the pivot angle 12 with respect to the component to be flexibly connected, for example the bearing housing 4.

For this purpose, the lever 3 forming the fork-shaped bearing points 3c to 3d is provided with rotating shaft journals 5c to 5.
A corresponding notch 3e for d is provided.

As shown in FIG. 4, the rotating shaft 5 is inserted into the lever 3 obliquely with respect to the vertical setting direction 13 and corresponding to the turning angle 12, so that the lever 3 receives the weight of the vibration table 1 or the strand casting mold. The position of is as shown in Figure 3,
The elastic material 8 is then under the desired tension, which is particularly advantageous for the alternating stress of the support bearing when the mold is swung up and down.

It is obvious that the tension between the part to be pivoted and this axis of rotation 5 can also be applied to other link locations.

Regarding this, in another embodiment shown in FIG. 6, the link parts are formed into bearing stands 14A, 14B, and the rotary shaft 5 is mounted inside these parts.

In each case, the sleeve 10 on the bearing side should have a pivot angle 12 that corresponds to the tension force exerted by the elastic material 8 on the sleeve 11 fixed to the rotating shaft 5, so that a tension is present. .

The cooling device 15 for a liquid or gaseous cooling medium 16 includes:
The elastic material 8 is cooled, and in this case a nozzle 17 is provided in the exemplary embodiment, by means of which a cooling medium 16 is supplied.
, for example by spraying water directly onto the material 8 .

According to the present invention, the rotating shaft is fitted in a material that has limited elasticity by matching the hardness to the force generated during casting vibration and has vibration damping properties, and is supported by the bearing housing. This has the advantage that the bearing gaps found in conventional plain bearings or roller bearings can be completely eliminated, allowing highly accurate movement, and in principle, wear between bearing members that move relative to each other can be avoided. has.

The support bearing according to the invention can be applied anywhere in the vibrating device of a strand casting mold, where a small pivoting angle is required due to the pivoting motion and elasticity is required in the direction of the pivoting motion of the rotating shaft.

In addition, the support bearing according to the invention is also suitable for absorbing shear forces acting perpendicularly to the direction of rocking force in a limited circumference.

The support bearing also takes up the thermal expansion of the mold vibration table or mold.

Below, preferred embodiments of the present invention will be listed.

■ A support bearing for a link lever in a vibration device for a strand casting mold, in which a rotating shaft that transmits lever force is supported by a bearing housing fixed to a member to be pivoted. The elastic material 8 is fitted with a material 8 having a limited elasticity, the hardness of which is matched to the forces occurring during the movement, and which has rocking damping properties. A support bearing for a link lever, characterized in that it is installed in an annular space 9 between a rotating shaft 5 and a sleeve 11 surrounding the rotating shaft 5, and is fixed to each sleeve.

By this measure, an independent component is created which can be installed in an exchangeable manner at the respective desired bearing location of the vibration device.

(2) The supporting bearing according to item 0, wherein the elastic material 8 is formed from a rubber compound made of a combination of various types of rubber or a rubber compound having a metal member inserted therein.

(2) The supporting bearing as described in the previous item (1) and (2), wherein the elastic material 8 is made of natural rubber or plastic.

In the case of vibrating devices, it is particularly important for strand casting operations that the power transmission rod from the vibrating motor be mounted without play.

No play can be achieved by several measures according to the basic idea of the invention.

(2) The support bearing according to any one of the preceding items 1 to 2, wherein the rotating shaft 5 has a polygonal cross section 5b in at least a length portion of the elastic material 8.

(2) The rotating shaft 5 has a flat portion 5e on the shaft journals 5c and 5d, and the flat portion is attached to the lever 3 at a predetermined turning angle 12 with respect to the bearing housing 4. The support bearing according to any one of items 1 to 2.

This pivoting angle results in a tensioning of the elastic material which is particularly advantageous for the alternating stress of the support bearing when the mold is swung up and down.

■ The link lever 3 has a fork-shaped bearing part 3c, 3
d, and a rotating shaft journal 5c.

The support bearing according to any one of the preceding items 1 to 5, wherein the notch 3e of 5d extends in the vertical setting direction 13 of the rotation shaft journals 5c and 5d at a turning angle 12. .

The above-mentioned tensions inside the support bearing according to the invention can also be created already during installation of the strand casting mold or the mold with the vibrating table.

The steady rocking motion inside the support bearing naturally generates heat which may reduce the high service life of the support bearing according to the invention.

■ Cooling device 15 for liquid or gaseous cooling medium 16
The supporting bearing according to any one of the preceding items 1 to 2, characterized in that it is attached especially for the elastic material 8.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway front view showing the installation of a strand casting mold vibration table inside a vibration device using a support bearing according to the present invention, Fig. 2 is a side view showing the installation of the mold vibration table, and Fig. 3 4 is a side view showing the pivoting of the mold vibration table of FIG. 3 during vibration operation; FIG. 5 is a cutaway of FIG. 3. Vertical section shown by line ■-■,
Fig. 6 is a vertical sectional view showing the support bearing cut along the line VI-VI in Fig. 3, and Fig. 7 is a vertical cross-sectional view showing the support bearing corresponding to the section line
(2) It is a side view belonging to FIG. 6 showing the cross-section. 1... Vibration table, 2... Support bearing, 3... Lever 4... Bearing mount, 5... Rotating shaft, 5b... Polygonal cross section, 5c, 5d... Shaft journal, 5e
...Flat part, 8...Material, 9...
... Annular space, 10 ... External sleeve, 11.
... Sleeve, 12 ... Turning angle, 13
... Vertical setting direction, 15 ... Cooling device.

Claims (1)

[Scope of utility model registration request] This is a support bearing for a link lever in a vibration device for a strand casting mold, in which a rotating shaft for transmitting lever force is supported by a bearing housing fixed to a member to be pivoted. A material 8 having limited elasticity that matches the hardness to the force generated by the force and having rocking damping properties
A support bearing for a link lever, characterized in that it is fitted in and supported by a bearing housing.