CN206539604U - A kind of four row cylinders and taper roller combination bearing - Google Patents

Abstract

A four-row cylindrical and tapered roller combined bearing, which belongs to the field of roll rolling bearings, is characterized in that the double-row cylindrical roller and double-row tapered roller combined bearing; the inner ring of the double-row cylindrical roller bearing and the inner ring of the double-row tapered roller bearing The bearing inner spacer is installed between them; the left and right rows of tapered rollers are respectively installed on the inner ring of the double-row tapered roller bearing through the cage, and the left and right rows of cylindrical rollers are installed on the outer ring of the three-row bearing through the cage. Inside: The outer ring of the three-row bearing, together with the left and right rows of cylindrical rollers and the cylindrical roller cage, are installed on the inner ring of the double-row cylindrical roller bearing and the outer circumference of the right row of tapered rollers, and the outer ring of the three-row bearing is equipped with lubricating oil The outer ring of the left row of tapered roller bearings is installed on the outer circumference of the left row of tapered roller bearings; the outer ring of the three-row bearing and the outer ring of the left row of tapered roller bearings is installed with an oil-conducting outer spacer, and the outer circumference of the oil-conducting outer spacer There is an oil storage groove in the middle, which communicates with the cavities between the left and right rows of tapered rollers through the radial oil guide groove and the left and right inclined holes. The advantage is that the bearing force is reasonable and uniform during rolling, and the service life of the bearing is improved.

Description

A Four-row Cylindrical and Tapered Roller Combined Bearing

technical field

The utility model belongs to the technical field of roll rolling bearings, in particular to a four-row cylinder and tapered roller combined bearing.

Background technique

The roll bearing is one of the basic components of a high-efficiency rolling mill. Since the roll bearing has to bear a large rolling force under the condition that the radial dimension is limited, the rolling bearings used in the rolling mill mostly use four-row cylindrical roller bearings or four-row roller bearings. row tapered roller bearings. The radial load capacity of four-row cylindrical roller bearings is larger than that of four-row tapered roller bearings of the same size. Four-row tapered roller bearings can bear axial loads while bearing radial loads, but four-row cylindrical roller bearings cannot bear axial loads. Bearings that can withstand axial loads must be installed on the rolls in order to exert four-row cylindrical roller bearings. The sub-bearing bears the characteristics of large radial load, which will make the roll assembly structure complicated.

At the same time, in the production and use of existing rolling mills, it is common that the working life of the bearing is much lower than the design life, and even a major accident of bearing burning occurs. The distribution is uneven, the load on the bearing far away from the roll side is small, and the bearing on the side close to the roll bears an excessive load, causing premature damage to the bearing.

Contents of the invention

The purpose of this utility model is to provide a new four-row cylindrical and tapered roller combined bearing, which can effectively overcome the shortcomings of the prior art.

The utility model of the present invention is realized in this way, as shown in Figure 1, it is characterized in that: a bearing inner spacer ring 7 is installed between the double row cylindrical roller bearing inner ring 1 and the double row tapered roller bearing inner ring 14; The rollers 11, 9 are installed on the inner ring 14 of the double-row tapered roller bearing through the left and right rows of tapered roller cages 13, 8 respectively; the left and right rows of cylindrical rollers 6, 2 are installed through the cylindrical roller cage 4 Inside the three-row bearing outer ring 3; the three-row bearing outer ring 3 together with the left and right cylindrical rollers 6, 2 and cylindrical roller cage 4 are installed on the double-row cylindrical roller bearing inner ring 1 and the right row of tapered rollers on the outer circumference of the child 9; the outer ring 12 of the left row of tapered roller bearings is set on the outer circumference of the left row of tapered roller bearings 11; Spacer 10. On the outer circumference of the three-row bearing outer ring 3, a lubricating oil port 5 communicates with the cavity between the left and right column rollers 6, 2; An oil storage groove 10.1 is formed in the middle of the circumference, and communicates with the cavities between the left and right rows of tapered rollers 11, 9 through radial oil guide holes 10.2 and left and right inclined holes 10.3, 10.3'.

The utility model advantage and positive effect are:

(1) According to the characteristic that the roll bears both radial load and axial load during the rolling work, the present invention adopts a four-row bearing combined with cylindrical and tapered rollers, and installs the double-row cylindrical roller bearing near the roll On the roll neck of the body, the stress condition of the bearing is improved, the assembly structure of the roll is simplified, and the bearing capacity and service life of the bearing are improved.

Description of drawings

Fig. 1 is a sectional view of the utility model. A summary is attached.

Figure 2 shows the structure of the oil guide outer spacer.

In the figure: 1—inner ring of double row cylindrical roller bearing; 2—right row of cylindrical roller; 3—outer ring of three row bearing; 4—cylindrical roller cage; 5—lubricating oil port; 6 ——Left row of cylindrical rollers; 7——Bearing inner spacer; 8——Right row of tapered roller cage; 9——Right row of tapered rollers; 10——Oil guide outer spacer; 11——Left row Tapered roller; 12—left row tapered roller bearing outer ring; 13—left row tapered roller cage; 14—double row tapered roller bearing inner ring; 15—roll neck; 10.1—storage Oil groove; 10.2——radial oil guide hole; 10.3, 10.3'——left and right oblique holes.

detailed description

As shown in Fig. 1, four columns of the utility model and tapered rollers form a bearing and are installed on the roll neck 15 of the roll. The installation sequence is: (1) install the cylindrical roller cage 4 together with the left and right columns of cylindrical rollers 6, 2 in the three-row bearing outer ring 3, and install the left and right column of tapered roller cages 13, 8 together with the left 1. The right row of tapered rollers 11 and 9 are installed on the double row tapered roller bearing inner ring 14; (2) the double row cylindrical roller bearing inner ring 1 is installed on the innermost section of the roll neck 15; (3) the The outer ring 3 of the three-row bearing is installed on the inner ring 1 of the double-row cylindrical roller bearing together with the cylindrical roller cage 4 and the left and right rows of cylindrical rollers 6 and 2; (4) Set the inner spacer ring 7 of the bearing on the roll On the roll neck 15, it conflicts with the inner ring 1 of the double-row cylindrical roller bearing; (5) the inner ring 14 of the double-row tapered roller bearing together with the left and right rows of tapered roller cages 13, 8 and the left and right rows of tapered The rollers 11 and 9 are set together on the roll neck 15, which is in conflict with the inner spacer ring 7 of the bearing; (6) The oil guide outer spacer ring 10 is set on the inner ring 14 of the double-row tapered roller bearing, and it is in contact with the inner ring 7 of the three-row bearing The outer ring 3 is in conflict with each other; (7) Put the inner ring 12 of the left row of tapered roller bearings on the left row of tapered rollers 11, and it is in conflict with the oil guide outer spacer ring 10.

Claims (1)

1. A four-row cylindrical and tapered roller combined bearing, characterized in that: a bearing inner spacer ( 7); the left and right rows of tapered rollers (11, 9) are respectively installed on the double row tapered roller bearing inner ring (14) through the left and right rows of tapered roller cages (13, 8); the left and right rows The cylindrical rollers (6, 2) are installed inside the three-row bearing outer ring (3) through the cylindrical roller cage (4); the three-row bearing outer ring (3) together with the left and right cylindrical rollers (6, 2) ) and the cylindrical roller cage (4) are installed on the outer circumference of the double row cylindrical roller bearing inner ring (1) and the right row tapered roller bearing (9); the left row tapered roller bearing outer ring (12) is installed on the left On the outer circumference of the row of tapered rollers (11), an oil guide outer spacer (10) is installed between the three-row bearing outer ring (3) and the left row of tapered roller bearing outer ring (12). (3) The lubricating oil port (5) is formed on the outer circumference to communicate with the cavity between the left and right column rollers (6, 2); the outer circumference of the oil guide outer spacer (10) is formed with The oil storage groove (10.1) communicates with the cavity between the left and right rows of tapered rollers (11, 9) through the radial oil guide hole (10.2) and the left and right inclined holes (10.3, 10.3').