JPS61293133A - Hydrogen pressure regulator for hydrogen-cooled rotary electric machine - Google Patents

Abstract

PURPOSE:To improve operation efficiency, by circulating cooling water flowing through the stator windings of a rotary electric machine, with a separate pump, and by cooling/heating the alloy which adsorbs/discharges the hydrogen gas for cooling the generator by a part of the cooling water. CONSTITUTION:The stator coils 2 of a rotary electric machine 1 are formed with hollow conductors, and headers 8a, 8b are connected to a separate pure water feeder 9 with pipes 10a, 10b. Pure water is circulated in a space between a tank 11 and the coils 2 via a pump 12 and a cooler 13, and a part of the water is fed back to the tank 11 through a pipe 18a, a heating pipe 16 in a case 14, and a pipe 18b. Hydrogen storage alloy 17 is contained in the case 14, and is heated/cooled with circulation water to discharge/adsorb hydrogen gas, and the hydrogen gas communicates with the space section 4 of the rotary electric machine 1 through a pipe 20. When the load of the rotary electric machine 1 is lightened, then the temperature of the circulation water falls, and hydrogen gas is adsorbed by the alloy 17, and the pressure of the hydrogen gas is reduced. As a result, the load of a cooling fan 6 fitted on a rotor is lightened, and efficiency can be improved.

Description

Detailed Description of the Invention [Technical Field of the Invention] The present invention relates to a hydrogen-cooled rotating electric machine, and particularly to a hydrogen-cooled rotating electric machine that uses a hydrogen storage alloy to adjust the hydrogen gas pressure inside the machine according to load fluctuations. It relates to a pressure regulating device.

[Technical background of the invention and its problems]

Some rotating electric machines, such as turbine generators, use hydrogen gas as a cooling medium.

In this case, it is necessary to increase the heat capacity of the hydrogen gas in the aircraft as the capacity of the turbine generator increases, i.e., (specific weight) x (specific heat) to increase the cooling effect. Especially in large capacity aircraft, the hydrogen gas in the aircraft Some have a pressure of 5.2 atm, for example.

However, in recent years, turbine generators have been used more frequently, and are sometimes used not only at 100% load but also at partial load. During this partial load, the electrical loss of the generator is small, and there is no need to keep the hydrogen gas pressure at 5.2 atm for cooling purposes. If the hydrogen gas pressure inside the machine is left at 5.2 atm during partial load, the windage loss of the rotor and the fan power will be reduced to 100%.
Since it is the same as when under load, the efficiency of the generator decreases. Therefore, in such a case, by lowering the hydrogen gas pressure inside the machine, the windage loss of the rotor and the fan power can be reduced, and the efficiency of the generator can be improved.

By the way, in conventional hydrogen-cooled rotating electric machines, the hydrogen gas inside the machine is injected using a high-pressure hydrogen gas cylinder. Therefore, in order to adjust the hydrogen gas pressure inside the machine according to load fluctuations, it is necessary to release hydrogen gas from inside the machine. The hydrogen gas was then re-injected from a high-pressure hydrogen gas cylinder. However, this method requires complicated operations for injecting and discharging hydrogen gas, requires sufficient safety measures when handling hydrogen gas, and consumes a large amount of hydrogen gas. There are also problems from the perspective of effective energy use.

In order to solve this problem, for example, there is an invention described in Japanese Utility Model Application Publication No. 55-12720, in which the hydrogen gas pressure inside the turbine generator can be adjusted by a pressure adjustment mechanism according to load fluctuations. There is something I did.

FIG. 6 shows a hydrogen gas pressure adjustment system in such a conventional hydrogen-cooled turbine generator. That is,
As shown in FIG. 6, in a turbine generator 31 connected to an external load system, hydrogen gas filled in a hydrogen gas cylinder 33 can be supplied to the inside 32 of the machine via a pressure regulating valve 34. The hydrogen gas pressure control system includes a relief hydrogen reserve chamber 36 that communicates with the inside of the machine via a pressure control valve 35, a piston 37 that adjusts the volume of this reserve chamber 36 and allows hydrogen gas to flow in and out of the inside of the machine 32, and this screw 1. The magnitude of the load is detected from the output of the piston drive mechanism 38 and the turbine generator 31 that drive the engine 37, and a drive command is given to the piston drive mechanism 38 according to the load fluctuation, and a drive command is given to the pressure regulating valve 35. It consists of a load following mechanism 39 that gives opening/closing commands.

Therefore, in the hydrogen gas pressure adjustment system of a turbine generator with such a configuration, the pressure in the hydrogen gas cylinder 33 is normally controlled to be constant by reducing the pressure by the pressure adjustment valve 34, and when there is a load change, the pressure in the hydrogen gas cylinder 33 is controlled to be constant. Follow-up control mechanism 3
Based on the command from 9, the piston 37 is driven to adjust the volume of the reserve chamber 36, and the opening degree of the pressure regulating valve 35 is controlled to adjust the in-machine hydrogen gas pressure of the turbine generator 32 according to load fluctuations. can do.

However, in the hydrogen gas pressure adjustment system of such a turbine generator, the volume of the reserve chamber 36 is adjusted by a piston 37 that slides on the circumferential surface of the reserve chamber. If the seal is not adequate, there is a risk that hydrogen gas, which is under high pressure on the side communicating with the inside of the machine, may leak to the back of the piston, which is in atmospheric conditions, leading to an explosion.

Therefore, recently, a method has been developed that allows the hydrogen gas pressure inside the aircraft to be easily adjusted without using the relief hydrogen reserve chamber described above or a driving device such as a piston that adjusts the volume of this reserve chamber, and without the consumption of hydrogen gas. The use of hydrogen storage alloys is being considered.

This hydrogen storage alloy is a combination of metal atoms such as titanium and Mitsushmetal, which have the property of absorbing hydrogen very well.When the temperature is lowered or the pressure is increased, the hydrogen storage alloy absorbs hydrogen gas and generates heat, and vice versa. When the pressure is increased or decreased, the absorbed hydrogen gas is released and the heat is taken away from the surroundings. Also, the temperature of the alloy itself changes depending on the pressure value of the hydrogen gas being sent; conversely, the temperature of the alloy itself changes. There is a correlation in that the pressure of the hydrogen gas generated also differs depending on the situation. 2 shows an example of the characteristics of a hydrogen storage alloy whose case is filled with hydrogen gas. That is, as shown in Figure 2, if the temperature of the hydrogen storage alloy is maintained at 50°C, the equilibrium hydrogen gas pressure inside the case will be 5.2 atm, which is
When cooled to 0'C, hydrogen is adsorbed and the equilibrium hydrogen gas pressure becomes 4.0 atm. When the temperature of the hydrogen storage alloy is raised again to 50° C. from this state, the equilibrium hydrogen pressure in the case becomes 5.2 atm.

Therefore, by utilizing the characteristics of such a hydrogen storage alloy, it is possible to change the internal hydrogen pressure of a hydrogen-cooled turbine generator depending on the load.

In this case, it is conceivable to control the hydrogen gas pressure inside the machine by forcibly changing the temperature of the hydrogen storage alloy using a heater and a cooler, but it would be more convenient if this could be done automatically.

(Object of the Invention) The present invention was made in view of the above-mentioned circumstances, and its purpose is to provide a stationary type hydrogen-cooled turbine generator without the risk of explosion, and to prevent hydrogen gas from being injected into or discharged from the inside of the hydrogen-cooled turbine generator. In addition, the hydrogen gas pressure inside the machine can be automatically and safely and efficiently adjusted according to load fluctuations.
It is an object of the present invention to provide a hydrogen pressure regulating device for a hydrogen-cooled rotating electric machine, which allows effective use of energy.

[Summary of the invention]

In order to achieve such an object, the present invention installs a case containing a hydrogen storage alloy that releases or adsorbs hydrogen gas in response to temperature changes in a rotating electrical machine that uses hydrogen gas as a cooling medium. The cooling water flow path formed in the case is connected to the winding cooling water circulation system of the rotating electrical machine so that the winding cooling water can flow in and out of the cooling water flow path, and the hydrogen storage is performed. It is characterized by being able to automatically adjust the in-machine hydrogen gas pressure according to load fluctuations by cooling or heating the alloy.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows an example of the configuration of a hydrogen pressure regulating device for a hydrogen-cooled rotating electric machine according to the present invention. In FIG. 1, 1 is a stator frame of a rotating electric machine, for example a turbine generator,
A stator core 3 having a stator winding 2 made of a hollow conductor through which cooling water can flow in and out is attached to its inner peripheral surface, and a gas ventilation space 4 is formed at its back. Reference numeral 5 denotes a rotor supported by a bearing, and a self-supporting fan 6 is attached to the rotor 5 to forcefully circulate hydrogen gas 7 sealed inside the machine at a pressure higher than atmospheric pressure. Further, 8a and 8b are headers for passing cooling water through the hollow conductor of the stator winding 2, and these headers 8a and 8b
A pure water supply device 9 installed outside the machine connects the pipes 10a and 1
Connected via 0b. This pure water supply device 9 includes a tank 11, a pump 12. It is composed of a cooler 13 and an ion exchange resin (not shown). On the other hand, 14 is a case provided outside the machine, and this case 14 has an upper header 15 at approximately the center of the circumferential surface of the cylinder. A powdered hydrogen storage alloy 17 is filled in the extra-tube space formed between each of these heat transfer tubes 16 along the direction of the heat transfer tube.

In such a case 14, one opening of the cylindrical body is connected to the middle of a pipe 10a connecting between the cooling water outflow side header 88 of the stator winding 2 and the tank 11 of the pure water supply device 9. A pipe 1 is connected to the pipe 18a that has been removed, and the pipe 1 returns the cooling water to the tank 11 of the pure water supply device 9 through the other opening of the cylindrical body.
8b to form a bypass path that bypasses a portion of the cooling water. Furthermore, the upper header 1 included in the case 14
5 is provided with a breathable filter 19 to prevent dust and particulates from floating or scattering into the cabin, and this part is connected via piping 20 to the gas ventilation space 4 inside the cabin, and hydrogen Hydrogen gas released from the storage alloy 17 or adsorbed by the hydrogen storage alloy 17 can be circulated to and from the inside of the machine.

In addition, 218.21b and 2IC are pipes 18a that form a cooling water bypass path connected to both end openings of the case 14,
18b and the pulp provided at appropriate locations on the pipe 20 that serves as a hydrogen gas flow path connecting the upper header 15 and the inside of the machine.
These are to prevent hydrogen gas inside the machine from being released into the atmosphere when the case 14 is removed from the generator side.

In the hydrogen pressure regulating device for the hydrogen-cooled turbine generator configured as described above, cooling water is supplied from the tank 11 of the pure water supply device 9 to the hollow conductor of the stator winding 2 through the pipe 10b.
, flows into the tank 1 of the pure water supply device 9 through the inflow header 8b, and from the outflow header 88 through the piping 10a.
Return to 1. It is assumed that the stator winding 2 is cooled by the stator winding cooling water circulation system, and at this time, the hydrogen storage alloy 17 filled in the case 14 is bypassed from the stator winding cooling water circulation system at that time. It is assumed that the flow rate of the cooling water is adjusted to correspond to the permissible hydrogen pressure for cooling the load of the rotating electric machine. In such a state, when the load on the generator increases, the current flowing through the stator winding 2 increases, and heat is generated in the conductor in proportion to the square of the current.

Therefore, the temperature of the cooling water flowing out to the outflow side header 88 through the hollow conductor of the stator winding 2 increases.

When a part of the cooling water whose temperature has increased flows from the stator winding cooling water circulation system described above through the cooling water flow path in the case 14 to the tank 11 of the pure water supply device 9, the hydrogen storage alloy filled in the case 15 17 is warmed, and the release of hydrogen gas from the hydrogen storage alloy 17 into the cabin is promoted. This increases the pressure of the hydrogen gas circulating inside the machine, which improves cooling of the heat generating parts inside the machine.

On the other hand, as the load on the generator decreases, the current flowing through the stator winding 2 also decreases, so the temperature of the cooling water flowing out to the outflow side header 88 through the hollow conductor of the stator winding 2 decreases. When a part of this cooling water whose temperature has decreased flows from the stator winding cooling water circulation system described above through the case 14 to the tank 11 of the pure water supply device 9, the hydrogen storage alloy 17 filled in the case 14 is cooled. , hydrogen gas inside the aircraft is adsorbed by the hydrogen storage alloy 17. This reduces the pressure of the hydrogen gas circulating inside the machine, which reduces wind damage on the surface of the rotor 5 and reduces fan power, improving the efficiency of the generator. In this case, hydrogen gas released into the machine from the hydrogen storage alloy 17 filled in the case 14 or adsorbed by the hydrogen storage alloy 17 from inside the machine flows through the filter 19 provided in the upper header 15 of the case 14, so the hydrogen storage Even if Alloy 17 is in powder form, this hydrogen storage alloy will not flow into the machine together with the gas flow or adhere to insulators and lower the electrical withstand voltage, improving reliability. It will be expensive.

As described above, in this embodiment, a plurality of heat transfer tubes 16 are disposed along the longitudinal direction of the cylinder inside the case 14 which has the upper header 15 at approximately the center of the circumferential surface of the cylinder, and each of these heat transfer tubes 16 is disposed along the longitudinal direction of the cylinder. A case 14 filled with a powdered hydrogen storage alloy 17 in the space outside the tubes formed between the heat tubes 1 (! Cooling water flows in and out from the cooling water system, and case 1
4 is communicated with the gas ventilation space inside the aircraft, and hydrogen gas is released from the hydrogen storage alloy 17 into the aircraft interior due to temperature changes of the cooling water, or hydrogen gas inside the aircraft is adsorbed by the hydrogen storage alloy. , the hydrogen gas pressure inside the machine can be automatically adjusted according to load fluctuations. In other words, the temperature of the cooling water in the stator windings is sensitive to the load, so when there is a load change, the hydrogen gas pressure inside the machine is quickly and automatically adjusted, and when the load increases, the heat generating parts inside the machine can be effectively cooled. Furthermore, when the load decreases, wind damage on the rotor surface and fan power can be reduced to improve the efficiency of the generator. In addition, since the hydrogen storage alloy 17 filled in the case 14 is heated and cooled by flowing cooling water in and out from the stator winding cooling water system of the generator, it is particularly useful for heaters and coolers. There is no need to use energy, and energy can be used effectively. Furthermore, case 14
Since a filter 19 is provided in the hydrogen gas flow path of the upper header 15, even if the hydrogen storage alloy 17 is in powder form, the powder can be prevented from entering the machine due to the gas flow, thereby increasing reliability. It becomes highly sexual. Furthermore, since the case 14 is provided outside the machine, if replacement or the like is required, it can be done without stopping the generator, and maintenance is easy.

In the above embodiment, one set of cases is installed outside the machine, but two sets of cases are provided, and when one set reaches the end of its lifespan, it is switched to the other set. Alternatively, the hydrogen storage alloy may be replaced and kept on standby as a reserve.

Next, another embodiment of the present invention will be described.

Fig. 3 shows another configuration example of a hydrogen pressure regulating device for a hydrogen-cooled rotating electrical machine. The same parts as in Fig. 1 are given the same symbols and their explanations are omitted, and only the different parts will be described here. . In this embodiment, as shown in FIG. 3, piping is provided that allows cooling water to flow into one opening of the case 14 from the stator winding cooling water system that connects the cooling water outflow side header 88 and the tank 11 of the pure water supply device 9. A cooling water reheater 22 is provided in the middle of the cooling water reheater 18a, and a piping 2 is installed between the piping 10b of the pure water supply device 9 and the piping 18a upstream of the cooling water reheater 22.
3 to bypass a portion of the low-temperature cooling water on the outlet side of the cooler 13. still,
24a, 24b, 24C are pipes 23, 10a, 10
This is a valve installed in the middle of b.

Here, in describing the effect of the above configuration, first, the piping 1
The reason why the cooling water reheater 22 is provided in the middle of the cooling water reheater 8a and a portion of the low temperature cooling water on the outlet side of the cooler 13 is bypassed to the piping 18a on the upstream side thereof will be described. In the case 14, a hydrogen storage alloy 17 filled inside the case 14
If the relationship between temperature and hydrogen equilibrium pressure matches the cooling water outlet temperature based on the load and the allowable hydrogen gas pressure in the machine,
By heating and cooling the hydrogen storage alloy 17 according to the cooling water outlet temperature, it is possible to automatically adjust the hydrogen gas pressure inside the machine according to load fluctuations without adding external cooling or heating heat. be.

However, in reality, there is no hydrogen storage alloy in which the cooling water outlet temperature and the allowable internal hydrogen gas pressure completely match. Figure 4 is a characteristic diagram showing the relationship between stator winding cooling water outlet temperature and allowable in-machine hydrogen pressure, and the relationship between hydrogen storage alloy temperature and hydrogen equilibrium pressure, where the solid line (A) shows the load and stator winding cooling water. Examples of the characteristics of the stator winding cooling water outlet temperature derived from the relationship between outlet temperature, load, and allowable hydrogen pressure are shown. d)
are characteristic examples showing the relationship between temperature and hydrogen equilibrium pressure of different types of hydrogen storage alloys. As can be seen from this characteristic diagram, the characteristics of the hydrogen storage alloy are shown by the chain double-dashed line (with respect to the solid line A, which is necessary for the operation of a hydrogen-cooled rotating electric machine, that is, the load (cooling water outlet temperature) and the allowable internal hydrogen pressure) a) Two-dot line (b).

There are several cases as shown in dashed lines (C) and (d).

Now, adjust the hydrogen pressure adjustment range to 4.2 to 2 9/cI
In the case of a hydrogen storage alloy with characteristics to the upper right of the solid line (A), such as the two-dot chain line (a), the outlet cooling water of the stator winding must always be further cooled before use. Furthermore, in the case of a hydrogen storage alloy with characteristics below the solid line A, as shown by the dashed-dotted line (C), it is necessary to always heat the outlet cooling water of the stator windings, resulting in energy loss. It is. On the other hand, in the case of hydrogen storage alloys having the characteristics of the dotted line (b) and the dashed-dotted line (d), they intersect with the solid line (A) in the pressure adjustment range, which is advantageous in terms of energy and is a desirable hydrogen storage alloy. I can say that. However, even if a hydrogen storage alloy with such characteristics is used, the characteristics do not match those shown by the solid line (A), so it is actually necessary to finely adjust the temperature of the stator winding cooling water. In other words, when using a hydrogen storage alloy with the characteristics shown in dotted line (b), if the stator winding cooling water outlet temperature is 80"C at 100% load, the hydrogen equilibrium pressure at that time will be approximately 5 K9/crl. Yes, 100%
Since the required hydrogen pressure at load exceeds 4.2 to 9/crl, at this point, the stator winding cooling water is slightly cooled and
It is necessary to make it reach the X11 point. Furthermore, when the hydrogen storage alloy is heated at a stator winding cooling water outlet temperature of 65°C at 75% load, the hydrogen equilibrium pressure is approximately 1.0 OK9/cM.
At this point, the stator winding cooling water is heated to
It is necessary to make it come to the 'Y' point.

In addition, when using a hydrogen storage alloy with the characteristics shown in dashed-dotted line (d), the characteristics in (b) above will be reversed, and the stator winding cooling water will be heated at 100% load, and at 75% load. In this case, it is necessary to cool the stator winding cooling water to cool the hydrogen storage alloy.

In this way, when heating and cooling the hydrogen storage alloy with the stator winding cooling water, the minimum amount of external heat is used to adjust the temperature of the cooling water reheater 22 and the outlet side of the cooler 13 in order to finely adjust the temperature of the hydrogen storage alloy. A portion of the low-temperature cooling water is bypassed through the pipe 23.

In the hydrogen pressure regulating device for the hydrogen-cooled turbine generator configured as described above, the stator winding 2 is cooled by the stator winding cooling water circulation system as in the above-described embodiment, and at this time, the case 14 is filled with water. It is assumed that the temperature of the hydrogen storage alloy 17 is adjusted to a temperature corresponding to the permissible hydrogen pressure for cooling the load of the rotating electric machine by cooling water bypassed from the stator winding cooling water circulation system at that time. In this situation, when the load on the generator increases, the current flowing through the stator winding 2 increases, and heat is generated in the conductor in proportion to the square of the current, so the stator winding 2 The temperature of the cooling water flowing out to the outflow side header 8a through the hollow conductor increases. A part of the cooling water whose temperature has increased flows from the stator winding cooling water circulation system described above to the cooling water reheater 22,
After heating the returned cooling water to an appropriate temperature, Case 1
4 and flows to the tank 11 of the pure water supply device 9.

Therefore, the hydrogen storage alloy 1 filled in the case 14
7 is warmed by the return cooling water heated by the cooling water reheater 22, so that release of hydrogen gas from the hydrogen storage alloy 17 into the interior of the aircraft is promoted.

As a result, the pressure of the hydrogen gas circulating inside the machine increases and becomes the permissible hydrogen gas pressure for the load, so that cooling of the heat generating parts inside the machine is improved. In this case, the cooling water reheater 22 is energized, and the valve 24a provided in the pipe 23 is closed.

On the other hand, as the load on the generator decreases, the current flowing through the stator winding 2 also decreases, so the temperature of the cooling water flowing out to the outflow side header 88 through the hollow conductor of the stator winding 2 decreases. A part of the cooling water whose temperature has decreased joins a part of the cooling water with a low temperature on the outlet side of the cooler 13 and flows through the case 14 to the tank 11 of the pure water supply device 9.
The hydrogen storage alloy 17 filled in the hydrogen storage alloy 17 is cooled. Therefore, the hydrogen gas inside the machine is adsorbed by the hydrogen storage alloy 17, and the pressure of the hydrogen gas circulating inside the machine is reduced to the permissible hydrogen gas pressure for the load at that time, causing wind damage on the surface of the rotor 5. This reduces fan power and improves generator efficiency. In this case, the cooling water reheater 22 is not energized, and the valve 24a provided in the pipe 23 is open.

As described above, in this embodiment, a pipe 18a that allows cooling water to flow into one opening of the case 14 from the stator winding cooling water system connecting the cooling water outlet header 88 and the tank 11 of the pure water supply device 9 is installed. A cooling water reheater 22 is provided, and a piping 23 connects the piping 10b of the pure water supply device 9 and the piping 18a upstream of the cooling water reheater 22, thereby cooling the outlet side of the cooler 13 at a lower temperature. Since the configuration is such that a portion of the water is bypassed, when the load increases or decreases, the in-machine hydrogen gas pressure can be adjusted to the allowable hydrogen gas pressure for the load by using the minimum amount of energy.

In addition, by heating the hydrogen storage alloy in the cooling water reheater before the load increases and raising the in-flight hydrogen pressure to the allowable hydrogen pressure for the load at the time of increase, the time required for pressure adjustment when the load increases It is possible to adjust the hydrogen pressure inside the aircraft by eliminating it.

In this embodiment, in order to lower the temperature of the return cooling water, a part of the low-temperature cooling water on the outlet side of the cooler 13 is bypassed by the pipe 23, but as shown in FIG. A cooler 25 may be provided in series with the cooling water reheater 22 in the pipe 18a through which cooling water returns from the cooling system to the case 14 and flows therein.

In each of the above-mentioned embodiments, a stator winding water cooling system is used as a medium for cooling and heating the hydrogen storage alloy. A water cooling system may also be used.

〔Effect of the invention〕

As described above, according to the present invention, in a rotating electric machine that uses hydrogen gas as a cooling medium, a case containing a hydrogen storage alloy that releases or adsorbs hydrogen gas due to changes in humidity is used to supply hydrogen gas to the in-machine hydrogen gas circulation system. The hydrogen is stored by connecting the cooling water flow passage formed in the case so as to be able to flow in and out of the case, and connecting the winding cooling water circulation system of the rotating electric machine to allow the winding cooling water to flow in and out of the cooling water flow passage. Since the alloy is cooled or heated, hydrogen gas can be injected into and discharged from the inside of the hydrogen-cooled turbine generator in a stationary type without the danger of explosion, and the hydrogen gas pressure inside the machine can be transferred to the rotating electrical machine. It is possible to provide a hydrogen pressure regulating device for a hydrogen-cooled rotating electric machine that can automatically adjust safely and efficiently in accordance with changes in the load of the hydrogen-cooled rotating electric machine, thereby making it possible to use energy effectively.

[Brief explanation of drawings]

Fig. 1 is a configuration explanatory diagram showing one embodiment of a hydrogen-cooled rotating electric machine according to the present invention, Fig. 2 is a characteristic diagram of a hydrogen storage alloy used in the same embodiment, and Fig. 3 is a diagram showing another embodiment of the present invention. FIG. 4 is a characteristic diagram showing the relationship between the stator winding cooling water outlet temperature and allowable in-machine hydrogen pressure, and the relationship between the hydrogen storage alloy and hydrogen equilibrium pressure. FIG. FIG. 6 is a block diagram showing the main parts of the embodiment. FIG. 6 is a block diagram showing the hydrogen pressure adjustment system of a conventional turbine generator. 1...Stator frame, 2...Stator winding, 3...Stator core, 4...Space, 5...・Rotor, 6...Self-fan, 7...Hydrogen gas, Ba, Bb...Header, 9...Pure water device, 10a, LOb・・・・
,... Piping, 11... Tank, 12...
...Pump, 13...Cooler, 14...
・Case, 15... Upper header of case, 1
6... Heat exchanger tube, 17... Hydrogen storage alloy, '18a, '18b... Piping, 19...
...Top header, 20...Piping, 218-21
G... Valve, 22... Cooling water reheater, 23... Piping, 24a to 24c...
・Valve, 25... Cooler. Applicant's representative Patent attorney Takehikotan Suzue Figure 3 - Marshal 'C65'C Alloy luck/fixation - Volume 5 a Ling Sokitake A3 Ward Imaginary Figure 4

Claims (2)

[Claims] (1) In a rotating electric machine that uses hydrogen gas as a cooling medium, a case housing a hydrogen storage alloy that releases or adsorbs hydrogen gas due to temperature changes is connected to the hydrogen gas circulation system inside the machine so that hydrogen gas can flow in and out, and A cooling water flow path formed in the case is connected to the winding cooling water circulation system of the rotating electrical machine, and winding cooling water is caused to flow in and out of the cooling water flow path to cool or heat the hydrogen storage alloy. A hydrogen pressure adjustment device for a hydrogen-cooled rotating electric machine, characterized in that hydrogen gas pressure is automatically adjusted according to load fluctuations. (2) In a rotating electric machine that uses hydrogen gas as a cooling medium, a case containing a hydrogen storage alloy that releases or adsorbs hydrogen gas due to temperature changes is connected to the hydrogen gas circulation system inside the machine so that hydrogen gas can flow in and out, and The cooling water flow passage formed in the case is connected to the winding cooling water circulation system of the rotating electrical machine, and the winding cooling water is supplied to the cooling water flow passage by a cooling water reheater and a cooler provided on the upstream side of the case. The temperature of the hydrogen storage alloy can be finely adjusted to match the permissible hydrogen gas pressure for the load by cooling or heating the hydrogen storage alloy by heating or cooling it and then allowing it to flow in and out. Hydrogen pressure adjustment device for hydrogen-cooled rotating electric machines.