JPS6257848A - Bearing cooling device - Google Patents

Abstract

PURPOSE:To improve workability by connecting a liquid pipe to the upper side of the liquid sump part of a liquid sump case body which is connected to a hollow chamber, providing a partition member for preventing a vapor from entering said liquid pipe, in said liquid case body, and confining the connecting part to said hollow chamber only to its upper part. 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 8 as shown by the arrow A. The working fluid coagulated and liquefied in the radiating device 8 is once stored in the liquid sump part 14 of a liquid sump case body 12 via a liquid pipe 15 as shown by the arrow B, and, then, is returned to the upper side of the hollow chamber 7 via the inner wall of an overflow pipe 13, while the vapor is prevented from entering the liquid pipe 15 by means of a partition member 16. By repeating these behaviors, the generated quantity of heat in the bearing 3 is thermally transferred to the radiating device 8 to efficiently carry out cooling. The connecting part to the hollow chamber 7 of the pedestal 4 is confined only to its upper part and there is no connecting part in the place below a rotary shaft 1, 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 portion of a ring such as an ID machine. [Prior Art] FIG. 2 shows a conventional bearing cooling device disclosed in, for example, Japanese Unexamined Patent Publication No. 57-632O.

[1]
For example, (2) is a rotating shaft of a machine tool, and (2) is a bearing mechanism.
It is composed of a bearing f3) that rotatably supports the rotating shaft (1), and a bearing stand (4) that supports this bearing (3). (5) is a boot IJ connected to a drive motor (not shown) via a V-belt (not shown), (6) is a bearing mechanism (
2), etc., (7) is an annular hollow chamber formed in, for example, the bearing stand (4) of the bearing mechanism (2) and filled with a working liquid such as ammonia or chlorofluorocarbon, and (8) is a heat dissipation device. and is cooled by a cooling fan (9). 0
a steam pipe that communicates the hollow chamber (7) with the heat dissipation device;
ctn is a liquid pipe that communicates the heat dissipation device (8) and the hollow chamber (7). Note that after the interiors of the hollow chamber (7), heat dissipation device (8), and steam pipe (10, liquid pipe 01) are vacuumed, a predetermined amount of working liquid such as ammonia or fluorocarbon is sealed inside them. Next, the operation will be explained. The rotating shaft (1) is rotated by the rotational force transmitted by the driving electric motor to the pulley (5) via the V-belt. With this rotation, the bearing (3) generates heat due to lI friction and its temperature rises. The amount of heat generated in this bearing (3) is transmitted to the bearing stand (4). The heat of the bearing (3) received by the bearing stand (4) is used as latent heat of vaporization when the working liquid such as fluorocarbons in the hollow chamber (7) is heated and vaporized, and the vapor of the vaporized fluorocarbons is released as its own vapor. Using steam pressure 1-
Then, the steam passes through the steam pipe αG to the heat dissipation device (8), where it is cooled by the surrounding air by the cooling fan (9). The latent heat is released to the surrounding air, and the amount of heat of the bearing (3) is released to the surrounding air. Condensed and liquefied. The working liquid passes through the liquid pipe α]) and moves into the hollow chamber (7) using gravity.
) - Return. By repeating the following operation as in C1, the amount of heat generated by the bearing (3) is transported to the heat radiating device [11] for efficient cooling. [Problems to be Solved by the Invention] However, in the conventional device configured as described above, the steam pipe αO is communicated with the hollow chamber (7) in the upper direction of the bearing stand (4), and the liquid pipe Ql) It communicates with the hollow chamber (7) of the bearing stand (4) located below the rotating shaft (1).
41 liquid tube C1l! The communication part is on the lower side, and there were problems such as the connection work and maintenance required. This invention was made to solve the above-mentioned problems, and an object thereof is to obtain a bearing cooling device with good workability. [Means for Solving the Problems] The bearing cooling bag W according to the present invention is provided with a liquid reservoir housing that communicates with the hollow chamber and has a liquid reservoir portion on the upper side of the bearing mechanism. The liquid pipe is connected to the upper part of the liquid reservoir in the body, and a partition member is installed in the liquid reservoir housing to prevent vapor from entering the liquid pipe.
It's another thing. [Function] In the bearing cooling device of the present invention, the working liquid that is not condensed and liquefied in the heat dissipation device returns to the upper hollow chamber through the liquid pipe and the liquid reservoir portion of the liquid reservoir housing. [Embodiment of the Invention] An embodiment of the invention will be described below with reference to FIG. In FIG. 1, (1) to (4), (7), and αa are the same as the configuration of the conventional device described above. (121 is a liquid reservoir housing that is disposed above the bearing stand (4) of the bearing mechanism (2), communicates with the hollow chamber (7), and has a liquid reservoir part α4I formed by the overflow pipe surface; aB is The liquid pipe a16+, which communicates with the upper side of the liquid reservoir 5041 of the liquid reservoir housing ①, is disposed in the center of the liquid reservoir housing 0, and is a tubular partition member that prevents vapor from entering the liquid pipe. Next, the operation (1) will be explained.The amount of heat generated by the bearing (31) is transmitted to the bearing stand (4) as in the conventional case, and the working liquid in the hollow chamber (7) is vaporized and becomes steam, passing through the steam pipe α0.・Move the heat dissipation device to (8) as shown by arrow A.
), the working liquid passes through the liquid pipe (to) as shown by arrow B and is stored in the liquid reservoir part α4) of the liquid reservoir housing (company), and then passes through the inner wall of the overflow pipe. Return to the upper hollow chamber (7). By repeating such operations, the amount of heat generated by the bearing A3) is transported to the heat radiating device for efficient cooling. Incidentally, entry of steam into the liquid pipe head is prevented by the partition member (2). By the way, the only part of the bearing stand (4) that communicates with the hollow chamber (7) is the upper part, and the lower part of the rotating shaft (1) has 7! ＜This simplifies the connection work and maintenance of these communicating parts. In the above embodiment, the hollow chamber (7) is provided in the bearing stand (4) of the bearing mechanism (2). (3) and bearing stand (4
) may be provided with a hollow chamber (7) between them, and the same effect as in the above embodiment can be achieved. By the way, in the above explanation, the case of a bearing cooling device applied to a machine tool was described, but it goes without saying that this invention is not limited to this and can also be applied to cooling the bearing part of a rotating electrical machine such as a DC machine. This provides the same effect as the above embodiment. [Effects of the Invention] As explained above, the present invention includes a liquid reservoir housing that communicates with the hollow chamber and has a liquid reservoir part on the upper side of the bearing mechanism,
The liquid pipe is connected to the upper part of the liquid reservoir part of the liquid reservoir housing, and by providing a partition member in the liquid reservoir housing to prevent steam from entering the liquid pipe, the communication part of the hollow chamber of the bearing mechanism is Only the upper part is used, and the workability is improved (b bearing cooling device can be obtained).

[Brief explanation of the drawing]

FIG. 1 is an enlarged cross-sectional side view of essential parts showing a bearing cooling device according to an embodiment of the present invention. FIG. 2 is a cross-sectional side view showing a conventional bearing cooling device. (7) is a hollow chamber, (8
) is the heat dissipation device, qO is the steam pipe, Q2+ is the liquid reservoir housing, α4
) is a liquid reservoir, the egg is a liquid pipe, and the west is a partition member O. In addition, the same reference numerals in the drawings indicate the same or equivalent parts.

Claims (1)

[Claims] (1) 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 this hollow chamber to a heat radiating device; and a steam pipe that guides the steam generated by vaporizing the working liquid in the hollow chamber, and condenses it in the heat radiating device. and a liquid pipe for returning the liquefied working liquid to the hollow chamber, wherein a liquid reservoir housing communicating with the hollow chamber and having a liquid reservoir section is disposed above the bearing mechanism, The liquid pipe is connected to the upper side of the liquid reservoir part of the reservoir housing, and a partition member is provided in the liquid reservoir housing to prevent vapor from entering the liquid pipe, and the working liquid condensed and liquefied by the heat dissipation device is A bearing cooling device characterized in that the cooling is returned to an upper side of the hollow chamber.