JPS6091025A - Cooling construction of lubricated type bearing housing - Google Patents

Abstract

PURPOSE:To realize a cooling construction for a lubricated type bearing housing having a high cooling effect with a simple construction to allow easy assembly and maintenance, by inserting cooling medium supply pipes to the storage baths in the bearing housing. CONSTITUTION:At portions on the side wall of a bottom half member 12a of an oil lubricated type bearing housing 12 and facing to each deep bottom of oil baths 14, longitudinally long oval openings 17, 17 are formed and the openings 17, 17 are tightly sealed with oval cover members 19, 19 to which cooling water pipes 18 are installed. The cooling water pipe 18 is bent to U-shape and its cooling water inlet end 14a and outlet end 14b pass through the cover member 19 and project out to the outside of the cover member 19, and the through portions of the pipe 18 in the cover member 19 are sealed watertight. At a condition in which the U-shape bent side of the cooling water supply pipe 18 is inserted from the opening 17 of the bottom half member 2a into the deep bottom portion of the oil bath 14, the cover member 19 is tightly fastened to the bottom half member 12a with bolts 20.

Description

[Detailed description of the invention] Technical field The present invention relates to a cooling structure for a 1f9R type bearing box.

BACKGROUND ART FIGS. 1 and 2 show a conventional example of an oil-lubricated bearing box. In the figure, l is a bearing installed in a bearing box 2, an oil bath 3 is formed in the lower half member 2a of the bearing box 2, and a part of the bearing 1 is stored in the oil path 3. It is soaked in lubricating oil 4.

In the bearing box 2, cooling water retention spaces 5 and 6 are formed in the thick parts of the lower half member 2a and the upper half member 2b of the bearing box 2 in order to control the temperature of the bearing 1 and the lubricating oil 4. Retention space 5
．． An introduction hole 5a communicating with 6.

Cooling water supply pipes (not shown) are connected to each of the cooling water supply pipes 6a and the discharge holes 5b, 6b, and the cooling water is circulated and supplied to the retention spaces 5 and 6 through these pipes.

However, such a water cooling structure has the following problems.

(2) Since the cooling water retention spaces 5 and 6 are far from the oil bath 3, heat conduction between the supplied cooling water, lubricating oil 4, and bearing 1 is poor, and a sufficient cooling effect cannot be obtained.

■ The cooling water retention spaces 5 and 6 have a structure in which a groove is formed in the thick part of the bearing box 2, and the open side of this groove is sealed with a lid member that is joined by welding or tightening. If welding is used, the bearing box 2 itself should not be damaged due to the risk of water leakage from the parts or tightening parts.
This means that the material is limited to T-capable materials. Further, in the cooling water retention spaces 5 and 6 having such a structure, even if a blockage occurs inside, it cannot be repaired, which is inconvenient from the viewpoint of maintenance.

■ Moreover, the processing is complicated, making it difficult to manufacture and increasing manufacturing costs.

■ Cooling water supply pipe and cooling water retention space 5 of bearing box 2,
6. Stress due to the temperature difference between these materials is applied to the connection with 6, easily causing cracks and damage.

An object of the present invention is to provide a cooling structure for a lubricated bearing box that eliminates the above-mentioned drawbacks in the conventional example, has a simple structure, is easy to process, is easy to maintain, and has a high cooling effect.

Overview This invention provides a lubricated bearing box having a lubricant reservoir inside, in which an opening facing the lubricant reservoir is formed in the outer wall of the bearing housing, and a refrigerant supply pipe has an inlet end and a discharge end. The refrigerant supply pipe is inserted into the lubricant reservoir by removably closing the opening with a lid member attached so as to protrude outward.

Embodiment An embodiment of the present invention will be described based on FIGS. 3 to 5. Reference numeral 12 denotes an oil-lubricated bearing box, and the lower half member 12& and the upper half member 12b are fastened together with bolts 13... The bearing 11 is arranged in a lower half H inside the bearing box 12.
It is held by A' 12a and the upper half member 12b. At the inner bottom of the lower half member 12a, an oil bath 14 with a deep bottom divided into two is formed on both left and right end surfaces of the bearing box 12 with the intermediate bearing support part 31 in between. Four lubricating oils 16 supplied from the holes 15, 15 are received in this oil bath 14, and a part of the bearing 11 is covered with this lubricating oil 16.
immersed in

In the side wall of the lower half member 12a, a vertically elongated opening 171 is provided in a portion facing each deep bottom portion of the oil nozzle 14.
17 are formed, and these openings 17 are each sealed by oblong lid members 19 and 19 to which cooling water supply pipes 18 are attached.

The cooling water supply pipe 18 is bent into a U-shape, and its cooling water introduction end 113a and cooling water discharge end 18b penetrate the lid member 19 and protrude to the outer surface thereof. The (Eve penetration part of member 19 is watertightly treated. And,
Connect the U-shaped non-end side of the cooling water supply X-tube 18 to the lower half member 12.
With the cover member 19 inserted into the deep bottom of the oil bath 14 through the opening 17 of a, the lid member 19 is tightened and fixed to the peripheral edge of the opening 17 with bolts 20 . A gasket 21 is sandwiched between the peripheral edge of the opening 17 and the lid member 19, thereby sealing the opening 017 in a watertight manner.

End seal rings 22, 22 are attached to the shaft penetrating portions on both left and right end surfaces of the bearing box 12, respectively.

This end seal ring body 22 consists of a pair of split rings separated into the lower half member 12a side and the upper half member 12b side, and has a plurality of inward flanges 23 on its inner peripheral surface. They are placed around the perimeter at predetermined intervals. This inward flange 23... is connected to a rotating shaft 24 supported by a bearing 11 as shown in FIG.
A labyrinth is formed with a plurality of outward flanges 25 provided around the surface of the shaft, and this labyrinth prevents the lubricating oil 16 in the bearing box 12 from flowing out of the shaft penetrating portion. Ru.

A felt seal ring 26 is attached to the inner periphery of the outer end of the end seal ring 22, and this felt seal ring 26 prevents dust from entering the bearing box 12 from the shaft penetrating portion and exiting the bearing box 12. Prevents oil leakage. FIG. 6 is an enlarged view showing the attached state of the felt seal ring 26, in which the felt seal ring 26 is fitted into the recessed step 22& formed on the inner peripheral edge of the outer end of the end seal ring 22, and the 22
Seal force t<-
The felt seal ring 26 is sandwiched between the felt seal rings 28 and 28 . When the felt seal ring 26 is installed, it is set to have a slight tightening margin between it and the rotating shaft 24, and due to the initial wear and hardening of the felt seal ring 26 during use, the rotating shaft 24
By reducing the gap to zero, the effect of preventing oil leakage and dust intrusion is improved.

29... is a hole for tightening and fixing the end seal ring 22 to the lower half member 128 and the upper half member 12b, and 30. 30 is an air breather provided on the upper half member 12'b. This prevents an increase in the internal pressure of the bearing box 12 due to a rise in temperature.

Effects This invention has the above-described structure.9. A refrigerant supply pipe (cooling water supply pipe 1B
) is inserted, so the pipe is directly exposed to the lubricant (lubricant oil 1).
6), the cooling effect on the lubricant and even the bearings is greatly improved. In addition, there is no need to separately form a space for refrigerant retention in the thick part of the bearing box, making the structure simple and easy to process, reducing manufacturing costs. There will be no inconvenience such as leakage. Furthermore, since the refrigerant supply pipe is attached to a lid member that removably seals the pipe insertion opening formed on the outer wall of the bearing box, even if the refrigerant supply pipe becomes clogged, it can be easily repaired. Parts can be replaced and the cooling structure can be maintained.

[Brief explanation of drawings]

1 and 2 are a front view and a vertical sectional view of a conventional example, respectively, FIG. 3 is a front view showing an embodiment of the present invention, FIG. 4 is a partially cutaway vertical sectional view thereof, and FIG. Its plan view and FIG. 6 are partially enlarged sectional views thereof. 12...Bearing box, 12&...Lower half member, 12111
... Upper half member, 14 ... Oil bath (lubricant reservoir), 17 ... Opening, 18 ... Cooling water supply pipe (refrigerant supply), 18a ... Cooling water introduction end Part, 18
b...Cooling water discharge end, 19...Lid member, 21.
...Patsukin Applicant: Koyo Seiko Co., Ltd., Hiroshi. Figure 3 Figure 4

Claims (1)

[Claims] In a lubricated bearing box having a lubricant storage section inside, an opening facing the lubricant storage section is formed in an outer wall of the bearing box, and a refrigerant supply vibrator is arranged such that its introduction end and discharge end protrude outward. The flWm type bearing box cooling wtM is characterized in that the refrigerant supply pipe described in mI is inserted into the lubricant reservoir by removably closing the opening with a lid member attached to the lubricant reservoir.