JPH0413455Y2 - - Google Patents

Description

[Detailed Description of the Invention] "Industrial Application Field" The present invention relates to a rolling bearing assembly with a water-cooled jacket that accommodates cylindrical roller bearings, spherical roller bearings, etc. that support rolls in continuous casting equipment, etc. .

"Prior Art" A bearing box 1 that supports a conventional rolling roll shaft 9 for continuous casting is divided into two parts, an upper member 2 and a lower member 3, as shown in FIG. 5, for example, for assembly to the shaft 9. As shown in FIG. 6, the top side of the upper member 2 is provided with a water cooling jacket 4 for cooling the bearing, which has a substantially quadrilateral planar shape. Outlets 6 are formed on both sides of the circumferential edge 7 of the water cooling jacket 4 approximately at the center thereof.

A cover 21 is fixedly connected to the water cooling jacket 4 of the upper member 2 by welding.

Generally, as a means to enhance the cooling effect of the water cooling jacket 4, it is desirable to make the quadrilateral shape of the water cooling jacket 4 as large as possible. However, depending on the size of the bearing assembly, the peripheral edge 7, especially the left and right side The thickness becomes thinner.

Therefore, the diameters of the supply port 5 and the discharge port 6 in the upper member 2 inevitably become small, and there is also the disadvantage that they cannot be formed in some cases.

Therefore, in order to make the supply port 5 and the discharge port 6 large, it is also known that the supply port 5 and the discharge port 6 are formed at diagonal corners of the water cooling jacket 4, as shown in FIGS. 7 and 8. There is.

By forming the supply/discharge ports in this way, the area of the water cooling jacket can be increased, and as a result, the amount of cooling water supplied can be increased compared to the conventional one, and the cooling capacity can be improved.

``Problem that the invention aims to solve'' However, if the amount of cooling water supplied to the water cooling jacket 4 is an appropriate amount, there is no problem, but if the amount of water decreases, as shown in FIG. 8, the upper and lower corners of the water cooling jacket 4 A vortex is generated, and air pockets 8, 8 are formed due to cavitation caused by this vortex.

When the amount of cooling water decreases by about 20%, the area of this air pocket becomes considerably large.

The air pocket 8 prevents passage of cooling water,
As a result, thermal expansion occurs in the cover 21 due to a decrease in cooling capacity for the upper member 2 of the bearing box, particularly the cover 21, and this causes the cover 2 of the upper member
1 will be deformed and there is a risk that the welded part will subsequently break.

The air pockets described above become larger as the supply amount of cooling water decreases, and the cooling effect decreases.

Therefore, the technical problem of the present invention is to improve the cooling effect without changing the shape of the water cooling jacket or the position of the cooling water supply/discharge port.

"Means for Solving the Problems" The configuration for eliminating the above-mentioned defects and solving the technical problems is as follows.

The bearing box that accommodates the rolling bearing is formed integrally with one member, or is divided into two parts, an upper member and a lower member, and the top side of the bearing box has a planar shape. A substantially quadrilateral water-cooled jacket for cooling the bearing is provided, and the water-cooled jacket has a cooling water supply port and a cooling water discharge port formed at substantially diagonal corners of the water-cooled jacket. In a rolling bearing assembly in which a rolling bearing is housed in a rolling bearing assembly, a weir is provided at least on the peripheral edge of the water cooling jacket on the supply side.

"Function" By providing a weir at least on the peripheral edge of the supply side of the cooling water jacket, the supplied cooling water impinges on the weir and turbulence occurs in the flow, and as a result, the generation of vortices is suppressed. It has been experimentally confirmed that no air pockets are formed even with a small amount of water.

"Example" An embodiment of the present invention will be described based on the drawings.

FIG. 1 is a partially sectional front view of the rolling bearing assembly of the present invention, and FIG. 2 is a partially sectional plan view of the upper member.

The bearing box 100 in FIG.
and lower member 103, and these upper and lower members 103
The rolling bearing 101 accommodated between the lower parts 102 and 103 has an outer ring 1011 divided into upper and lower parts and a cage (not shown) divided into two parts between the inner ring 1012, or is provided with a cage. A large number of rollers 1013 are arranged without any problems.

The upper member 102 has a curved surface 102 that matches the outer circumference of the outer ring 1011 of the rolling bearing 101, as shown in FIG.
7 is formed on the inner periphery, and a curved water cooling jacket 1021 is formed on the top side, and the planar shape of the water cooling jacket 1021 is approximately quadrilateral as shown in FIG. A cooling water supply port 1022 and a cooling water discharge port 1023 are formed at substantially diagonal corners 1024 and 1025 of the water cooling jacket 1021.

104 is a weir, and the water cooling jacket 102
1 at least on the supply port 1022 side periphery 102
6.

Preferably, the length of the weir 104 is approximately 1/4 of the axial width l of the water cooling jacket 1021.

Note that the thickness, width, and length of the weir 104 are changed as appropriate depending on the size of the water cooling jacket.

Reference numeral 105 fastens the lower end, that is, the male threaded portion, of the fastening bolt 106 inserted into the through hole 105 formed at the left and right ends of the upper member 102 to the female threaded portion 1031 of the lower member 103.

A cover 1028 covers the opening of the water cooling jacket of the upper member 102, and the cover 1028 is attached to the upper member by welding.

The lower member 103 has a rolling bearing 1 as shown in FIG.
Curved surface 1034 that matches the outer circumference of the outer ring 1011 of 01
is formed, and the water cooling jacket 1
Cooling water grooves 1032 and 1033 communicating with the supply port 1022 and the discharge port 1023 of 02 are formed on the left and right sides, respectively.

Therefore, in the embodiment shown in FIGS. 1 and 2, the cooling water supplied to the upper member 102 through the cooling water channel 1032 of the lower member 103 is supplied to the peripheral edge of the water cooling jacket 1021 on the supply port 1022 side. 1
By impinging on the weir 104 provided at 026, the flow is disturbed and the formation of air pockets is prevented.

Therefore, the cooling water flows evenly over the entire surface of the water cooling jacket 1021.

FIG. 3 is a partially sectional front view showing another embodiment of the present invention, and the difference from the first embodiment is a weir 1041.
The position is approximately at the center of the peripheral edge 1026 of the water cooling jacket 1021.

Therefore, the cooling water supplied from the supply side 1022 impinges on the weir 1041 provided in the center, causing turbulence in the water flow, changing the direction of the water flow flowing diagonally, and preventing the formation of air pockets. .

Other configurations are the same as those of the first embodiment, so the same reference numerals are given, and the explanation thereof will be omitted.

In the example, the bearing box that accommodates the rolling bearing is explained as a split type in which it is divided into two parts, an upper member and a lower member. It may also be implemented.

``Effect of the invention'' By providing a weir at an appropriate location on the periphery of the water cooling jacket at least on the side of the cooling water supply port,
The cooling water flowing along the diagonal impinges on the weir, causing turbulence in the water flow, thereby preventing the formation of air pockets within the water cooling jacket.

Therefore, the cooling water uniformly spreads over the entire circumference of the inner surface of the water cooling jacket formed on the upper member, and exerts a sufficient cooling effect on the upper member, especially the cover.
Since it can be cooled with about 60% of the amount of water used in the past, it not only helps to save water, but also provides high safety against fluctuations in water amount and is extremely effective in preventing deformation of the cover.

[Brief explanation of the drawing]

Fig. 1 is a partially sectional front view of the rolling bearing assembly of the present invention, Fig. 2 is a partially sectional plan view of the upper member, and Fig. 3 is a partially sectional plan view of the upper member.
The figure is a partially sectional front view showing another embodiment of the present invention.
FIG. 4 is a partially sectional plan view of the upper member in FIG. 3, and FIGS. 5 to 8 are views showing conventionally known examples.
5 and 7 are partially sectional front views, and FIGS. 6 and 8 are partially sectional plan views. Explanation of symbols, 100... Bearing box, 101... Rolling bearing, 102... Upper member, 103... Lower member, 1021... Water cooling jacket, 1022...
... Supply port, 1023 ... Discharge port, 104, 104
1...Weir.

Claims (1)

[Claims for Utility Model Registration] (1) The bearing box that accommodates the rolling bearing is integrally formed from one member, or is divided into two parts, an upper member and a lower member, and A water-cooled jacket for cooling the bearing is provided on the top side of the bearing box, and the water-cooled jacket has a substantially quadrilateral planar shape, and the water-cooled jacket has a cooling water supply port and a cooling water discharge port.
In a rolling bearing assembly formed at a substantially diagonal corner of the water cooling jacket and housing a rolling bearing in the bearing box, a weir is provided at least at a peripheral edge on the supply port side of the water cooling jacket. A rolling bearing assembly featuring: (2) The rolling bearing assembly according to claim 1 of the utility model registration claim, wherein the rolling bearing is a full complement roller bearing without a cage. (3) The rolling bearing assembly according to claim 1 of the utility model registration claim, wherein the rolling bearing is a roller bearing with a cage. (4) A rolling bearing assembly according to any one of claims 1 to 3 of the claims registered as a utility model, in which the bearing components excluding the rolling elements are semicircular and divided into two parts.