WO2017024646A1 - Bearing structure of main drive gearbox - Google Patents

Abstract

A bearing structure of a main drive gearbox comprises a gear shaft (1) and a thrust bearing seat (4). The edge of the thrust bearing seat (4) is sealed by using an end cover. Alignment roller bearings (8) are disposed in the direction parallel to the gear shaft (1). Thrust alignment roller bearings (10) are disposed in the direction perpendicular to the gear shaft (1). A spacer sleeve (2) is provided between the two thrust alignment roller bearings (10). Block pieces (9) are provided between the alignment roller bearings (8) and the thrust alignment roller bearings (10). Springs (6) are provided between the two thrust alignment roller bearings (10). One end of each spring (6) is fixed to the thrust bearing seat (4) by using a screw (5), and the other end of each spring (6) compresses the thrust alignment roller bearing (10) by compressing an ejection block (7). The original condition in which alignment roller bearings (8) bear dual force is changed by additionally disposing thrust alignment roller bearings in a twenty-roller mill, so that the thrust alignment roller bearings bear axial force, and the alignment roller bearings bear radial force. Therefore, force borne by the bearings is reduced in a limited space, the structure of the gearbox is compact, and the weight of the gearbox is reduced.

Description

Bearing structure of main transmission gear box Technical field

The present invention relates to a bearing structure, and in particular to a bearing structure of a main drive gearbox.

Background technique

Generally, there are one bearing, a spherical roller bearing or a tapered roller bearing on both sides of the gear shaft of the gear box. These two bearings can bear radial force and axial force at the same time. For the helical gear reducer and the two-way rotation force, both sides The bearing will bear both radial and axial forces, and the force will be more complicated than simply bearing the radial force, which will affect the bearing life. For the ordinary gearbox, the problem of reducing the force can be achieved by increasing the gear center distance and increasing the bearing. However, for the main drive of the twenty-roll mill, the four-axis output pitch is small, and the size can not be adjusted basically, that is, the gear center distance is small and the bearing cannot be increased by increasing the center distance to increase the bearing life. Now in order to overcome this problem, the bearings are staggered, which will increase the size of the gearbox structure, increase the weight and increase the production cost.

Summary of the invention

The object of the present invention is to overcome the above problems existing in the prior art, and to provide a bearing structure of a main transmission gear box, which is suitable for a bearing structure in a gear box of a twenty-high rolling mill, in order to improve the bearing in a limited space. Stress, increase life expectancy.

In order to achieve the above technical effects and achieve the above technical effects, the present invention is achieved by the following technical solutions:

A bearing structure of a main transmission gearbox includes a gear shaft and a thrust bearing seat, the edge of the thrust bearing seat is sealed by an end cover, and the gear shaft is provided with a self-aligning roller bearing in a parallel direction, the gear shaft a thrust centering roller bearing is disposed in a vertical direction, and a spacer sleeve is disposed between the two thrust self-aligning roller bearings, and a flap is disposed between the spherical roller bearing and the thrust spherical roller bearing, and two A spring is disposed between the thrust centering roller bearings, one end of the spring is fixed to the thrust bearing seat by a screw, and the other end of the spring is pressed against the thrust centering roller bearing by pressing the top block.

As an optimization, the two thrust-aligning roller bearings are arranged symmetrically.

As an optimization, the thrust bearing housing has eight holes on the circumference, four holes are forward, and four holes are reversed and symmetrically arranged.

As an optimization, the spring, the top block and the thrust centering roller bearing are each disposed within the thrust bearing housing.

The beneficial effects of the invention are:

The invention has novel design and simple structure. By setting the structure in the gear box of the twenty-roll mill, the double-stressing condition of the original self-aligning roller bearing is changed by adding the thrust-aligning roller bearing, so that the thrust-aligning roller bearing bears the shaft. The force, the self-aligning roller bearing is subjected to radial force, reducing the bearing force, increasing the life in a limited space, and making the gearbox Compact size, reduced weight and cost savings.

DRAWINGS

The drawings described herein are intended to provide a further understanding of the invention, and are intended to be a part of the invention. In the drawing:

Figure 1 is an overall view of the gearbox;

Fig. 2 is an enlarged view of a portion I.

The figures indicate: 1, gear shaft, 2, spacer sleeve, 3, end cover, 4, thrust bearing seat, 5, screw, 6, spring, 7, top block, 8, self-aligning roller bearing, 9, block Sheet, 10, thrust spherical roller bearings.

detailed description

The invention will be described in detail below with reference to the drawings in conjunction with the embodiments.

Referring to Fig. 1, the gear wheel of the general ten-roll mill has a self-aligning roller bearing on both sides of the gear shaft, and is subjected to radial force and axial force at the same time. For the helical gear reduction box and the two-way rotation force, both sides The bearing will bear both radial and axial forces, and the force will be more complicated than simply bearing the radial force, which will affect the bearing life. However, for the main drive of the twenty-roll mill, the four-axis output pitch is small, and the size can not be adjusted basically, that is, the gear center distance is small and the bearing cannot be increased by increasing the center distance to increase the bearing life. Overcome the problem of force by setting the I structure.

Referring to FIG. 2, a bearing structure of a main transmission gearbox includes a gear shaft 1 and a thrust bearing housing 4, and the thrust bearing housing 4 is uniformly provided with eight holes on the circumference thereof for fixing the spring 6 Four of the eight holes are forward, four holes are reversed, and are symmetrically disposed, the edge of the thrust bearing block 4 is sealed by the end cap 3, and the parallel direction of the gear shaft 1 is fixed by screws Two aligning roller bearings 8 are arranged on the upper and lower sides for sharing the longitudinal force of the shaft, and two thrust aligning roller bearings 10 are arranged in the vertical direction of the gear shaft 1 for sharing the axial force, two of the above A spacer sleeve 2 is disposed between the thrust spherical roller bearings 10 for adjusting a gap between the two thrust spherical roller bearings 10, and the spherical roller bearing 8 and the thrust spherical roller bearing 10 are disposed between the thrust roller bearings 10 a blocking piece 7, between the two thrust-aligning roller bearings 10 is provided with a spring 6, one end of the spring 6 is fixed to the thrust bearing block 4 by a screw 5, and the other end of the spring 6 is pressed against the top block 7 Press the thrust centering roller bearing 10 .

Two of the thrust spherical roller bearings 10 are symmetrically arranged.

The spring 6, the top block 7 and the thrust centering roller bearing 10 are each disposed within the thrust bearing housing 4.

The above description is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Claims (4)

A bearing structure of a main drive gearbox, comprising: a gear shaft (1) and a thrust bearing seat (4), the edge of the thrust bearing seat (4) being sealed by an end cover (3), A aligning roller bearing (8) is disposed in a parallel direction of the gear shaft (1), and a thrust aligning roller bearing (10) is disposed in a vertical direction of the gear shaft (1), and the two thrust aligning roller bearings (10) Between the gap sleeve (2) is provided, between the aligning roller bearing (8) and the thrust aligning roller bearing (10) is provided with a flap (7), two of the thrust aligning roller bearings A spring (6) is provided between (10), one end of the spring (6) is fixed to the thrust bearing seat (4) by a screw (5), and the other end of the spring (6) is pressed against the top block ( 7) Press the thrust centering roller bearing (10). The bearing structure of a main transmission gearbox according to claim 1, characterized in that two of said thrust spherical roller bearings (10) are symmetrically arranged. The bearing structure of the main transmission gearbox according to claim 1, wherein the thrust bearing housing (4) has eight holes on the circumference, four holes are positive, and four holes are reversed. , symmetric setting. A bearing structure for a main transmission gearbox according to claim 1, wherein said spring (6), said top block (7) and said thrust spherical roller bearing (10) are both disposed at said stop Push the bearing housing (4).

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