JPS6257850A - Bearing cooling device - Google Patents

Abstract

PURPOSE:To improve workability by providing the liquid sump part of a liquid sump case body which is connected to a hollow chamber, in an opening part on the upper side of a bearing, connecting a liquid pipe to the upper part of the liquid sump part, providing a partition member for preventing a vapor from entering said liquid pipe, on said 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 via a vapor pipe 10 as shown by the arrow A. The working fluid coagulated and liquefied in the radiating device is once stored in the liquid sump part 15 of a liquid sump case body 13 via a liquid pipe 16 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 14, while the vapor is prevented from entering the liquid pipe 16 by means of a partition member 17. By repeating these actions, the generated quantity of heat in the bearing 3 is thermally transferred to the radiating device, 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 [Field of Industrial Application] The present invention relates to a bearing cooling device for cooling a bearing portion of, for example, a machine tool.

[Conventional technology]

FIG. 2 shows a conventional bearing cooling device disclosed in, for example, Japanese Unexamined Patent Publication No. 57-76320.
For example, is the rotating shaft of a machine tool, (2) is the bearing mechanism, and 1
It is composed of a bearing (3) that rotatably supports a rotating shaft (1), and a bearing stand (4) that supports this bearing (3). (5) is a boot IJ connected to a drive electric motor (not shown) via a V-belt (not shown), (6) is a bed that supports the bearing mechanism (2), etc., and (7) is the bearing machine $+2).
For example, C is formed on the bearing stand (4) and ammonia, 20
An annular hollow chamber (8) in which a working liquid is sealed, such as 7, is a heat dissipation device and is cooled by a cooling fan (9).

αq is a steam pipe that communicates the hollow chamber (7) and the heat radiating device (8), and (b) is a liquid pipe that communicates the heat radiating device (8) and the hollow chamber (7). Note that after the hollow chamber (7), the heat dissipation device (8), the steam pipe αq, and the liquid pipe (b) are vacuumed, a predetermined amount of a 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 to the gooey (5) by the driving electric motor via the V-belt. With this rotation, the bearing (3) generates heat due to friction and its temperature rises.The amount of heat generated in the bearing (3) is transmitted to the bearing stand (4). The amount of heat received by the bearing (3) in the bearing stand (4) is exerted as heat in the evaporation layer when the working liquid such as fluorocarbons in the hollow chamber (7) is heated and vaporized. uses its own vapor pressure to move the steam pipe (IG1) to the heat dissipation device (8), and is cooled by the surrounding air by the cooling fan (9). It returns to a liquid state, but the latent heat of condensation is released to the surrounding air, and the heat of one bearing (3) is radiated to the surrounding air.The condensed and liquefied working liquid is transferred to a hollow chamber (7 ) Par - back. By repeating such operations, the amount of heat generated by the bearing (3) is transferred to the heat radiating device (8) for efficient cooling.

[Problem that the invention seeks to solve]

However, in the conventional device configured as described above, the steam pipe section communicates with the hollow chamber (1) located above the bearing stand (4), and the liquid pipe (B) is located below the rotating shaft (R). The bearing pedestal (4) is connected to the hollow chamber (7) of the bearing pedestal (4).
) The communication part of the liquid pipe CLυ is on the lower side, and this problem has arisen in that it requires time and effort to connect and maintain the teapot.

This invention was made to solve the problems mentioned above.
The purpose of this invention is to obtain a bearing cooling device with good workability.

[Means for solving problems]

The bearing cooling device according to the present invention includes an opening extending in the longitudinal direction of the shaft that communicates with the hollow chamber on the upper side of the bearing mechanism,
A liquid reservoir housing that communicates with the hollow chamber and has a liquid reservoir S is disposed at the opening of the bearing mechanism, and a liquid pipe on the upper side of the liquid reservoir of the liquid reservoir fiber is communicated with the liquid reservoir ring body. It is equipped with two partition members to prevent steam from entering.

[For production]

In the bearing cooling device according to the second aspect of the present invention, the working liquid condensed and liquefied in the heat dissipation device flows through the liquid pipe and the liquid reservoir S of the liquid reservoir housing and returns to the hollow chamber on the upper side.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to FIG. In Figure 1, (1) to (4), (7), α
Q is the same as the configuration of the conventional device described above. (2) is an opening formed on the upper side of the bearing stand (4) of the bearing mechanism (2) and extending in the longitudinal direction of the shaft that communicates with the hollow chamber (7);
) is arranged so as to cover the opening 0 of the bearing stand (4), and communicates with the hollow chamber (7) through the opening (2), and also allows the liquid reservoir 1 to flow from the overflow 'W'. In the formed liquid reservoir housing, αQ is a liquid pipe connected to the upper side of the liquid reservoir part α0 of the liquid reservoir housing (toward).

The α force is a tubular partition member that is disposed in the liquid reservoir housing (toward) and prevents vapor from entering the liquid pipe αQ.

Next, the operation will be explained. The amount of heat generated by the bearing (3) is transmitted to the bearing stand (4) as in the conventional case, and the working liquid in the hollow chamber (7) is vaporized and converted into steam. [It moves through the steam pipe section to the black heat dissipation device (8) as shown by arrow A. Heat dissipation device 8
) The working liquid condensed and liquefied flows through the liquid pipe α・− as shown by arrow B.
After the liquid is assembled and stored in the liquid reservoir part αG of the liquid reservoir housing (A).

Upper hollow chamber (7) through the inner wall of the overflow pipe
Return to By repeating such operations, the amount of heat generated by the fifth bearing (3) is transferred to the heat dissipation device δζ and efficiently cooled. Incidentally, the entry of steam from the liquid pipe αQ・＼ is prevented by the partition member Q″t). By the way, the only part of the bearing stand (4) that communicates with the hollow chamber (7) is the upper part, and the rotating shaft (1) In the lower position, there are no communicating parts, which simplifies the connection work and maintenance of these communicating parts.

Incidentally, in the above embodiment, the hollow chamber (7) was provided in the bearing stand (4) of the bearing mechanism (2), but
2) bearing (3), or bearing (3) and bearing stand (4)
A hollow chamber (7) may be provided between the two, 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 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.

〔Effect of the invention〕

As explained above, this invention forms a shaft opening extending in the longitudinal direction of the shaft communicating with the hollow chamber on the upper side of the bearing mechanism,
A liquid reservoir housing 6 is provided which communicates with the opening IC hollow chamber of the bearing mechanism through the opening part A P and has a liquid reservoir part, and connects a liquid pipe to something above the liquid reservoir part of the liquid reservoir housing, Since a partition member is provided to prevent vapor from entering the liquid pipe in the liquid reservoir housing≦ζ, the communication part of the hollow chamber of the bearing mechanism is only at the upper part, and a bearing cooling device with good workability is obtained. be able to.

[Brief explanation of the drawing]

FIG. 2 is an enlarged cross-sectional side view of a main part of a bearing cooling device according to an embodiment of the present invention, and FIG. 2 is an H-plane side view showing a conventional bearing cooling device.

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 an opening extending in the longitudinal direction of the shaft communicating with the hollow chamber is formed on the upper side of the bearing mechanism; disposing a liquid reservoir housing communicating with the hollow chamber through the opening and having a liquid reservoir in the opening, and communicating the liquid pipe above the liquid reservoir of the liquid reservoir housing;
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 returned to the upper side of the hollow chamber. Bearing cooling device.