JPS6257842A - Bearing cooling device - Google Patents

Abstract

PURPOSE:To improve workability and maintainability by connecting a liquid pipe to both of a radiating device and a vapor pipe and making a working fluid which is coagulated and liquefied in said radiating device return to a hollow chamber via said liquid pipe and said vapor pipe. CONSTITUTION:The generated quantity of heat in a bearing 3 is transferred to a pedestal 4 and a working fluid in a hollow chamber 7 is vaporized to become a vapor and moved to a radiating device via a vapor pipe 10 as shown by the arrow A. The working fluid which is coagulated and liquefied in the radiating device is returned to the hollow chamber 7 via the inner walls of a liquid pipe 12 and the vapor pipe 10 as shown by the arrow B. By repeating these behaviors, the generated quantity of heat in the bearing 3 is thermally transferred to the radiating device, to carry out cooling effectively. The connecting part to the hollow chamber 7 of the pedestal 4 is only in one place on the upper part, and there is no connecting part in the place below a rotary shaft 1, thereby, simplifying the labor of the connecting operation, maintenance, etc. of the connecting part.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a bearing cooling device for cooling a bearing center of a machine tool or the like.

[Conventional technology]

FIG. 2 shows a conventional bearing cooling device disclosed in, for example, Japanese Unexamined Patent Publication No. 57-78320.
is, for example, a rotating shaft of a machine tool, +211, and is composed of a bearing (31) that rotatably supports the rotating shaft +11, and a bearing stand 14 that supports this bearing f31'i. (6) A V-belt (
(not shown), f6+ is a bearing mechanism (21 etc., fully supported bed, (7) is a bearing mechanism (
2), for example, formed on the bearing stand +41 and containing ammonia,
An annular hollow chamber in which a working liquid such as fluorocarbon is sealed (8)
is a heat dissipation device, and is cooled by a cooling fan (9). (lO) is a steam pipe that communicates the hollow chamber t71 and the heat radiating device (8), and 1ll) is the steam pipe that communicates the heat radiating device (8) with the hollow chamber (
This is a liquid pipe that fully communicates with 7). Note that after the interiors of the hollow chamber (7), heat dissipation device (8), steam pipe (tlO), and liquid pipe (11) are vacuumed, a predetermined amount of working liquid such as ammonia or chlorofluorocarbon is sealed inside them.

Next, the operation will be explained. The rotating shaft (11) is rotated by the rotational force transmitted to the pulley (5) via the V-belt '2 by the drive 'a cutting machine. With this rotation, the bearing (3)
1 generates heat due to friction and the temperature rises.

The amount of heat generated in this bearing (3) is transmitted to the pedestal (4).

The amount of heat received by the bearing (31) in the bearing stand (4) is transferred to the hollow chamber (7).
) When heating and vaporizing the working liquid such as fluorocarbons, the vaporized fluorocarbons are generated as latent heat of vaporization, and the vaporized fluorocarbons are passed through the steam pipe 1101 using its own vapor pressure to the heat dissipation device (8).
and is cooled by ambient air by a cooling fan (9). At this time, the vapor of fluorocarbon, etc. condenses and liquefies and becomes a liquid, but the latent heat of condensation is released to the surrounding air, and the heat forging of @uke (3) is radiated to the surrounding air. The condensed working liquid passes through the liquid pipe (Illk) to the hollow chamber (7) using force. +81K heat is transported for efficient cooling.

[Problems to be Solved by the Invention] However, in the conventional device configured as described above, the steam pipe (10) is connected to the hollow chamber +71 VC located below the 1lII pedestal (4), and the liquid pipe (+11) It communicates with the hollow chamber () of the bearing stand (4) located below the rotating shaft Il+.

This invention has many problems such as the pedestal (4) has two communication points and the liquid pipe (11) has a communication point on the lower side, which requires time and effort for connection work and maintenance. This was developed in order to solve the following problems, and the object is to obtain a bearing cooling device with good workability.

[Means for solving problems]

In the bearing cooling device according to the present invention, 1, a liquid pipe total heat dissipation device and a steam pipe are connected to each other.

[Effect]

In the bearing cooling device according to the present invention, the working liquid condensed and liquefied in the heat dissipation device returns to the first hollow chamber through the liquid pipe and the steam pipe.

[Embodiments of the invention]

Is the following an example of this invention? This will be explained based on FIG. In FIG. 1, ill −+41, 171,
tlol has the same configuration as the conventional device described in [7] above.

(12) is a liquid pipe that fully communicates with the heat dissipation device (8) and the steam pipe (lO).

Next, the operation will be explained. The amount of heat generated by the bearing (310) is transmitted to the VC @ pedestal (4) as before, and the working liquid in the hollow chamber (7) is vaporized and becomes steam through the steam pipe lot to the heat dissipation device (8) as shown by arrow A. Move. Heat dissipation device (8)
The working liquid condensed and liquefied is drained into the hollow chamber (7) through the inner wall of the liquid pipe and steam pipe as shown by arrow B. By repeating this operation, the amount of heat generated by the bearing (3j) is increased. #!II is transported to a heat dissipation device for efficient cooling.

By the way, the communication part of the bearing stand (4) with the hollow chamber (71) is only at the northern part, and there is no communication part below the 1 rotation axis fil, and the connection work of these communication parts is arranged eζ
In the above embodiment, the case where the hollow chamber is provided in the bearing mechanism (21 bearing stand + 41) is described, but the bearing mechanism 12
A hollow chamber (7) may be provided between the first bearing (3) or between the bearing (3) and the bearing stand (41), and the same effect as in the above embodiment can be obtained.

By the way, in the above explanation, the case of a bearing cooling device for machine tools was described, but this invention is not limited to this and can be applied to cooling of bearings of rotating machines such as DC machines. Of course, the same effects as in the above embodiment can be achieved.

〔Effect of the invention〕

As explained above, in this invention, by connecting the liquid pipe to the steam pipe, the communication part of the hollow chamber of the bearing mechanism is narrowed upward. 9. Bearing Cooling Device with Good Workability? Obtainable.

[Brief explanation of drawings]

FIG. 1 is an enlarged cross-sectional side view of essential parts of a bearing cooling device according to an embodiment of the present invention, and FIG. 2 is a cross-sectional side view showing a conventional bearing cooling device. In the figure, (2) is the bearing mechanism, (7) is the hollow chamber, and (8) is the bearing mechanism.
) is a heat dissipation device, +101 is a steam pipe, (in Japan is a liquid pipe.) The same reference numerals in Figures 9 and 9 indicate the same - or corresponding parts.

Claims (1)

[Claims] an annular hollow chamber formed inside the bearing mechanism and filled with a working liquid; a steam pipe that guides the steam generated by vaporizing the working liquid in the hollow chamber to a heat radiating device; and a liquid pipe for returning the working liquid into the hollow chamber, wherein the liquid pipe is connected to the steam pipe, and the working liquid condensed and liquefied by the heat dissipation device is passed through the inner wall of the steam pipe and into the hollow chamber. A bearing cooling device characterized in that the bearing cooling device is made to return to its original position.