JPS5917025A - Cooling device of oil in bearing oil tank - Google Patents

Abstract

PURPOSE:To eliminate the leakage of water into oil in an oil tank, by drilling plural holes to an oil pan and fixing a heat resistor from a bottom face of the oil pan in accordance with a number of the holes. CONSTITUTION:Plural holes are drilled to an oil pan 11 fixed to the bottom part of an oil frame 8 of a bearing oil tank, and a heat resistor 12 is fixed from a bottom face of the oil pan 11 in accordance with a number of the holes in the oil pan 11. A heat column 15 is provided to an upper side of the heat resistor 12, and plural fins 16 are fixed to the periphery of the heat column 15. Hair pin pipes 13 are inserted into the heat resistor 12, and water used as a cooling medium is allowed to circulatively flow in the hair pin pipes 13.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cooling device for oil in a vertical bearing oil tank, and more particularly to a cooling structure in which a finned heat column is provided in an oil tank for storing lubricating oil.

Conventionally, among vertical axis machines, for example, as shown in Fig. 1,
In order to support the rotor of a hydroelectric generator in a predetermined position, there is one in which a runner 2 is fixed to a rotating shaft 1. As the runner 2 rotates, lubricating oil is drawn between the runner 2 and the bearing 3, and the runner 2 is supported by the bearing 3. Bearing 3 is oil frame 8
Fixed.

It is fixed to the bottom of the frame 8. And oil pa/6
An oil dam 4 is fixed inside. Furthermore, a bearing oil tank device is constructed by fixing the oil claim 8 with a bearing frame 9. Further, in the oil tank, there is an oil level 30 up to almost the top of the height of the set bearing 3.

Heat is then generated due to shearing of the oil film interposed between the rotating runner 2 and the bearing 3. This heat is transmitted to the oil cooler 5 and carried out to the outside using water flowing through the pipes of the oil cooler 5 as a medium. The load applied to the shaft reaches the oil frame 8 from the bearing through the oil film, and is supported by the bearing frame 9 from the oil frame 8.

This conventional vertical shaft type bearing oil tank device has the following drawbacks.

(1) Since the flange 10 of the oil cooler 5 and the oil pan 6 are tightened with bolts in the oil tank, there is a high possibility of water leakage.

(2) If there are scratches on either the flange surface or the oil pan surface, a gap will form, and water will leak from that gap.

If a gap occurs at the joint, water will leak through that gap.

As described above, when water is mixed into the lubricating oil, the viscosity of the lubricating oil decreases, and the bearing oil film becomes unable to withstand the load, resulting in a major drawback in that the bearing papitt seeding surface burns out.

The present invention has been made in view of the above drawbacks. The invention is illustrated in FIG. The oil pan 11 fixed to the bottom of the oil frame 8 of the bearing oil tank has a plurality of holes penetrated therein, and a heat register 12 is fixed to the bottom surface of the oil pan 11 according to the number of holes in the oil pan 11. . A heat column 15 is installed on the upper side (oil groove side) of the heat disc 12.
A plurality of fins 16 are fixed to the outer periphery of the heat column 15. By the way, in Heat Jisku 12,
A hairbin pipe 13 is inserted, and water as a cooling medium is circulated through the hairbin pipe 13.

Therefore, the heat generated by the shearing of the oil film between the rotating runner 2 and the bearing 3 is transmitted to the fins 16 through the lubricating oil, and from the fins 16 to the heat column 15.
, the heat sister 12, and the hairbin pipe 13, and is transmitted from the hairbin pipe 13 to the cooling water flowing through this pipe. This heat is then carried out to the outside.

According to the present invention, the bearing can be cooled continuously, and since there is no flange of the oil cooler in the oil bath of the oil tank, there is no water leakage, which is effective in preventing burnout of the bearing bapitt sliding surface. Note that 7 in the figure is an oil cover.

[Brief explanation of the drawing]

Fig. 1 Fi is a cross-sectional view of the oil tank portion of a conventional vertical shaft rotating machine;
FIG. 2 is a cross-sectional view of the oil tank portion of the rotating machine of the present invention, and FIG. 3 is a cross-sectional view taken along the line 1--2 in FIG. 2.

Claims (1)

[Claims] 1. In a bearing oil tank of a vertical rotating machine, a heat column is fixed to a heat sister that passes through an oil pan and is fixed to this oil pan and holds a cooling pipe, and faces into the bearing oil tank. An oil cooling device in a bearing oil tank characterized by having a plurality of fins fixed to the surface.