JPH037041A - Cooling device for waterwheel bearing of vertical shaft waterwheel generator - Google Patents

Abstract

PURPOSE:To eliminate auxiliary machine and to facilitate maintenance by providing a plurality of heat pumps having a waterwheel bearing oil sump as a heating section and a cooling air path in the partition of an air guide as a condenser section. CONSTITUTION:A partition 5 is formed integrally with an outside air guide 1 and circumferentially splits a space formed by the outside air guide 1 and an inside air guide 2 equally into three sections. Air enters through three suction ports 1a then flows through the space of the air guide and delivered upward through a delivery port 5a, while furthermore the air passes through the air guide and reaches to a generator thus cooling the generator. On the other hand, a plurality of pipes are arranged across a waterwheel bearing oil sump 10 and the cooling air path in the partition 5 and working liquid is encapsulated in the pipes thus constituting a heat pipe 4 where the waterwheel bearing oil sump 10 functions as a heating suction and the cooling air path in the partition 5 functions as a condenser section. Since the oil in the waterwheel bearing oil sump can be cooled without requiring a fan, maintenance can be facilitated.

Description

[Detailed description of the invention] [Industrial application field]

The second invention relates to a water turbine bearing cooling device in which a heat pipe is formed in an oil self-contained water turbine bearing of a vertical shaft water turbine generator that drives an outlet pipe ventilation type generator.

[Conventional technology]

Conventionally, in self-contained oil bearings for vertical shaft turbine generators,
It is known to insert heat pipes into water turbine bearing oil tanks. However, since there is no cooling air to cool the heat pipe on the water turbine side, which is the condensing part of the heat pipe, it was necessary to provide a forced fan driven by a motor. Alternatively, it was necessary to circulate cooling water to the condensing section.

[Problem to be solved by the invention]

Conventional systems that use forced fans driven by motors or cooling water have the drawbacks of requiring time and effort for maintenance and consuming auxiliary power. An object of the present invention is to provide a water turbine bearing cooling device for a vertical shaft water turbine generator that does not use these auxiliary machines and does not require time and effort for maintenance.

[Means to solve the problem]

The above purpose is to connect the upper part of the water wheel bearing oil tank, the barrel of the generator, and the lower part of the generator bearing oil tank so as to suck air and guide it to the generator in the water wheel bearing of the chamber shaft water turbine that drives the outlet pipe ventilation type photoelectric machine. a double-walled air guide consisting of an outer air guide and an inner air guide; A partition is provided to guide the water turbine bearing oil tank rearward and upward, and a plurality of vertical pipes are provided spanning the water turbine bearing oil tank and the cooling air passage in the partition, and hydraulic fluid is sealed in the pipes to cause the water turbine bearing oil tank to generate heat. This is achieved by a water turbine bearing cooling device for a vertical shaft water turbine generator, which has a heat pipe with the cooling air passage in the partition as a condensing part.

[For use]

A double-walled air guide consisting of an outer air guide and an inner air guide is provided between the upper part of the water turbine bearing oil tank and the barrel of the generator and the lower generator bearing oil tank so as to suck air and guide it to the generator; A partition is provided which is fixed to the air guide and divides the space of the air guide into a plurality of spaces in the circumferential direction, and guides the air upward after circulating in the circumferential direction. Since multiple heat pipes are provided in the vertical direction spanning the passage, air is sucked in from the intake port of the outer air guide and circulated in the circumferential direction within the partition, allowing air to flow parallel to the fins of the heat pipe, thereby increasing the heat pipe. Can be cooled.

【Example】

The present invention will be described in detail below based on the drawings. FIG. 1 is a sectional view of a water turbine bearing cooling device for a vertical shaft water turbine generator according to an embodiment of the present invention, and FIG. 2 is a sectional view taken along line AA in FIG. In FIG. 1, the outer air guide 1 has an upper part fixed to a barrel 9 and a lower part fixed to a water turbine bearing oil tank 10, and an inner air guide 2 has an upper part fixed to a generator lower bearing oil tank 8 and a lower part to a water turbine bearing oil tank 10. Fixed. The water wheel shaft 3 is connected to a generator shaft 7, and is supported by a main bearing 6 within a water wheel bearing oil tank 10. The water turbine bearing oil tank lO is covered with a bearing cover 11. The partition 5 is made integrally with the outer air guide 1, and divides the space formed by the outer air guide 1 and the inner air guide 2 into three equal parts in the circumferential direction, as shown in FIG. In Figure 2, air enters from three suction ports 1a, circulates in the circumferential direction through the air guide space, is discharged upward from the discharge port 5a, and then passes through the air guide to reach the generator to cool the generator. do. The oil in the water wheel bearing oil tank 10 is supported by the main bearing 6. As the water wheel shaft 30 rotates, the oil in the main bearing 6 is pushed upward by the pumping action of the radial holes drilled in a portion of the collar of the water wheel shaft 3. At that time, a plurality of vertical pipes are provided spanning the water turbine bearing oil tank 10 and the cooling air passage in the partition 5, and the pipes are filled with working fluid to make the water turbine bearing oil tank 10 a heat generating part, and the cooling air inside the partition 5 is heated. A heat pipe 4 was constructed in which the air passage serves as a condensing section. Each heat pipe is provided with fins in its heat generating section and condensing section. The partition 5 covers the top of the heat pipe so that the cooling air flows parallel to the fins of the heat pipe 4 and has a sufficient flow velocity, and the inner air guide 2 prevents air from flowing to the cross section where the heat pipe 4 is not present. It is partitioned closer to the outer diameter side. The heat pipe 4 is filled with water or fluorocarbon as a working fluid, and the working fluid heated by the oil in the water turbine bearing oil tank 10 is
It evaporates and rises, is cooled by cooling air in the condensing section, condenses, and then descends due to gravity. Thereafter, similar operations are repeated to cool the oil in the water turbine bearing oil tank IO. The above has explained the turbine bearing cooling system for an indoor shaft water turbine that drives an outlet pipe ventilation type photoelectric machine. Heat pipes can be used in the same way as in the case of . In the case of the inlet pipe ventilation type, the air that has cooled the generator is guided through a double-walled air guide, and the cooling air is circulated from top to bottom to cool the heat pipe. τEffect of the Invention According to the present invention, an outer air guide and an inner air guide are provided between the upper part of the water turbine bearing oil tank and the barrel of the generator and the lower generator bearing oil tank so as to suck air and guide it to the generator. a double-walled air guide, and a partition that is fixed to the outer air guide and divides the space of the air guide into a plurality of spaces in the circumferential direction, and guides the air upward after circulating in the circumferential direction; A plurality of heat pipes are provided in which the water turbine bearing oil tank is used as a heat generating part and the cooling air passage in the partition is used as a condensing part, and the oil in the water turbine bearing oil tank can be cooled without using a fan, which facilitates maintenance. In addition, since the air guide is double-walled, the pressure inside the water turbine bearing oil tank is maintained at atmospheric pressure, so it is possible to completely prevent oil mist from the water turbine bearing from being sucked in by the generator's air intake.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a water turbine bearing cooling device for a vertical shaft water turbine generator according to an embodiment of the present invention, and FIG. 2 is a sectional view taken along line AA in FIG. l: Outside air guide, 1a: Suction port, 2: Inside air guide, 3: Water wheel shaft, 4: Heat pipe, 5: Partition, 5a
: Discharge port, 6: Main bearing, 7: Generator shaft, 8: Generator lower bearing oil tank, 9: Barrel, lO: Water turbine bearing oil tank.

Claims (1)

[Claims] 1) In the water turbine bearing of the vertical shaft water turbine that drives the outlet pipe ventilation type generator, so as to suck air and guide it to the generator,
A double-walled air guide consisting of an outer air guide and an inner air guide is provided between the upper part of the water turbine bearing oil tank, the barrel of the generator, and the lower generator bearing oil tank; It is divided into a plurality of pipes in the circumferential direction and is provided with a partition that allows air to circulate in the circumferential direction and then guides it upward, and in this case, a plurality of vertical pipes are provided that span the water turbine bearing oil tank and the cooling air passage in the partition. A water turbine bearing for a vertical shaft water turbine generator, characterized in that a heat pipe is formed by filling a pipe with working fluid to make the water turbine bearing oil tank a heat generating part and a cooling air passage in the partition as a condensing part. Cooling system.